WO2013136944A1 - Coal dry distillation device - Google Patents

Description

Coal carbonization equipment

The present invention relates to a coal carbonization apparatus for carbonizing dried coal, and is particularly useful when applied to reforming porous low-grade coal (low quality coal) having a high water content such as lignite and subbituminous coal. It is a thing.

Low-grade coal (low quality coal) with high water content such as lignite and sub-bituminous coal has a low calorific value per unit weight, so heat treatment and drying will increase the calorific value per unit weight. I have to.

As such a coal reforming apparatus for reforming low-grade coal, for example, there is an external heating type rotary kiln which is a dry distillation apparatus of an indirect heating method in which low-grade coal is indirectly heated by a heating gas to dry distillation. The low-grade coal is dried before the rotary kiln to become dry coal, and the dry coal is supplied to the inner cylinder. The dry coal is carbonized by indirect heating to become carbonized coal, and the carbonized coal is discharged from the inner cylinder.

JP 2003-176985 A

By the way, by the above-mentioned dry distillation, pyrolysis gas (dry distillation gas) such as carbon monoxide, water vapor, methanol, and tar is generated from the above-mentioned dry coal (low-grade coal), and at the same time, trace component gas such as mercury is also generated. . The rotary kiln described above has a structure in which there is a distance between the heating unit that heats the dry coal and the discharge unit that discharges the dry coal, and the dry coal cools when moving to the discharge unit. Will go. Since the cold carbonized carbon adsorbs the mercury in the carbonized gas, the mercury concentration per unit weight of the carbonized carbon increases.

From the above, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a coal carbonization apparatus capable of producing carbonized carbon having a low mercury content.

A coal carbonization apparatus according to a first invention for solving the above-described problem has an inner cylinder to which dry coal is supplied and an outer cylinder that covers the inner cylinder, and the inner gas is heated by the heated gas supplied to the outer cylinder. A coal dry distillation apparatus having a dry distillation apparatus main body that indirectly heats the dry coal in a cylinder to generate dry distillation coal and dry distillation gas, and suppresses adsorption of mercury contained in the dry distillation gas to the dry distillation coal. Alternatively, the present invention is characterized by comprising low mercury-containing dry distillation coal generating means for generating the dry distillation coal having a low mercury content by removing the dry distillation coal adsorbing the mercury.

The coal dry distillation apparatus according to the second invention for solving the above-described problem is the coal dry distillation apparatus according to the first invention according to the aforementioned invention, wherein the low mercury-containing dry distillation coal generating means is a gas in the inner cylinder. The gas suction port of the exhaust pipe is disposed between the substantially central portion in the longitudinal direction of the inner cylinder and the outlet of the coal heating unit using the heated gas.

The coal carbonization apparatus according to the third invention for solving the above-described problem is the coal carbonization apparatus according to the second invention described above, comprising a carbonization coal discharge means for discharging the carbonization coal, and the carbonization coal discharge. The apparatus further comprises carrier gas supply means for supplying carrier gas to the means.

A coal dry distillation apparatus according to a fourth invention that solves the above-described problem is the coal dry distillation apparatus according to the third invention described above, wherein the heated gas discharged from the outer cylinder is supplied to the inert gas supply means. A heating gas feeding means for feeding is provided.

The coal dry distillation apparatus according to the fifth invention for solving the above-described problem is the coal dry distillation apparatus according to the fourth invention described above, wherein the heating gas supply means cools the heating gas, and Purifying processing means for purifying the cooling gas cooled by the cooling means, and a purifying gas supply pipe for supplying the purifying gas purified by the purifying means to the inert gas supplying means. Features.

A coal carbonization apparatus according to a sixth invention for solving the above-described problem is the coal carbonization apparatus according to the first invention described above, wherein the low-mercury-containing carbonization generating means is provided in a front stage of the carbonization apparatus main body. The dry coal before being supplied to the inner cylinder is preheated drying means for indirectly heating the dry coal with a preheating heating gas to generate preheated dry coal.

A coal dry distillation apparatus according to a seventh invention for solving the above-described problem is the coal dry distillation apparatus according to the sixth invention described above, wherein the dry coal is heated to 280 to 350 ° C. by the preheating heating gas. It is characterized by that.

The coal dry distillation apparatus according to the eighth invention for solving the above-described problem is the coal dry distillation apparatus according to the first invention described above, comprising dry distillation coal discharge means for discharging the dry distillation coal, and containing the low mercury content. Classifying that the carbonized carbon generating means classifies the carbonized coal discharged from the carbonized carbon discharging means into coarse powdered carbonized coal having a particle size larger than a predetermined particle size and fine powdered carbonized coal having a size smaller than a predetermined particle size. An apparatus and a pulverized dry distillation coal discharging means for discharging the pulverized dry distillation coal classified by the classification device are provided.

The coal dry distillation apparatus according to the ninth invention for solving the above-described problem is the coal dry distillation apparatus according to the eighth invention described above, wherein the classification device includes a classification plate for classifying the dry distillation coal, and the classification. The through hole of the plate is 0.42 mm to 2 mm.

A coal dry distillation apparatus according to a tenth aspect of the present invention that solves the above-described problem is the coal dry distillation apparatus according to the first aspect of the invention described above, having a dry distillation coal discharge means for discharging the dry distillation coal, and containing the low mercury content. The carbonized carbon generating means is disposed between the inner cylinder and the carbonized carbon discharging means, and the carbonized coal discharged from the inner cylinder is coarsely powdered carbonized coal having a size larger than a predetermined particle diameter, and the predetermined particles. A classifying device for classifying into pulverized carbonized coal having a size smaller than the diameter, and a pulverized carbonized coal discharging means for discharging the pulverized carbonized coal classified by the classifying device are provided.

A coal carbonization apparatus according to an eleventh invention for solving the above-described problem is the coal carbonization apparatus according to the first invention described above, comprising a carbonization coal discharging means for discharging the carbonization coal, and the low mercury content The carbonized carbon generating means is a carbonized carbon circulation promoting device that rapidly distributes the carbonized coal in the inner cylinder to the carbonized carbon discharge means side.

A coal dry distillation apparatus according to a twelfth invention for solving the above-described problem is the coal dry distillation apparatus according to the eleventh invention described above, wherein a tip portion of the dry distillation coal distribution promoting device is a dry distillation coal discharge of the outer cylinder. It is arranged near the furnace wall on the outlet side.

A coal dry distillation apparatus according to a thirteenth aspect of the present invention for solving the above-described problem is the coal dry distillation apparatus according to the first aspect of the invention described above, having a dry distillation coal discharge means for discharging the dry distillation coal in the inner cylinder. The low-mercury-containing carbonized carbon generating means is a plate that is fixed to the carbonized carbon discharging means and extends in the longitudinal direction of the inner cylinder, and the plate is disposed in contact with the upper part of the carbonized coal. It is characterized by that.

A coal dry distillation apparatus according to a fourteenth invention for solving the above-described problem is the coal dry distillation apparatus according to the thirteenth invention described above, wherein the inert gas supply means supplies an inert gas into the dry distillation coal discharge means. Is further provided.

A coal dry distillation apparatus according to a fifteenth aspect of the present invention for solving the above-described problem is the coal dry distillation apparatus according to the first aspect of the invention, comprising dry distillation coal discharge means for discharging the dry distillation coal, and the low mercury dry distillation. The charcoal generating means is a heating device that is provided in the carbonized carbon discharge means and heats the carbonized coal in the vicinity of the carbonized carbon discharge means.

A coal dry distillation apparatus according to a sixteenth aspect of the present invention for solving the above-described problem is the coal dry distillation apparatus according to the fifteenth aspect of the invention, wherein the heating device is a burner.

A coal dry distillation apparatus according to a seventeenth aspect of the present invention that solves the above-described problem is the coal dry distillation apparatus according to the fifteenth aspect of the invention described above, wherein the heating device is rotatably provided and a heating gas can flow therethrough. It is characterized by being a heat exchange tube.

A coal dry distillation apparatus according to an eighteenth aspect of the present invention that solves the above-described problem is the coal dry distillation apparatus according to the first aspect of the invention described above, having a dry distillation coal discharge means for discharging the dry distillation coal, and containing the low mercury content. The carbonized carbon production means is an oxidant supply device that supplies an oxidant to the carbonized carbon near the carbonized carbon discharge means.

According to the coal carbonization apparatus according to the present invention, by providing a low-mercury-containing carbonized carbon production means, to suppress the adsorption of mercury to the carbonized carbon, or to remove the carbonized carbon with a large amount of mercury adsorption, Carbonized carbon with a low mercury content can be produced.

It is a schematic block diagram which shows the 1st Example of the coal carbonization apparatus which concerns on this invention. It is a schematic block diagram which shows the 2nd Example of the coal carbonization apparatus which concerns on this invention. It is a schematic block diagram which shows the 3rd Example of the dry distillation coal manufacturing equipment which concerns on this invention. It is a schematic block diagram which shows the 4th Example of the coal carbonization apparatus which concerns on this invention. It is a schematic block diagram which shows the 5th Example of the coal carbonization apparatus which concerns on this invention. It is a graph which shows the relationship between the particle diameter of dry distillation coal, and the amount of mercury adsorption. It is a schematic block diagram which shows the 6th Example of the coal carbonization apparatus which concerns on this invention. It is a schematic block diagram which shows the 7th Example of the coal carbonization apparatus which concerns on this invention. It is a schematic block diagram which shows the 8th Example of the coal carbonization apparatus which concerns on this invention. It is a schematic block diagram which shows the 9th Example of the coal carbonization apparatus which concerns on this invention. It is a schematic block diagram which shows the 10th Example of the coal carbonization apparatus which concerns on this invention. It is a schematic block diagram which shows the 11th Example of the coal carbonization apparatus which concerns on this invention. It is a schematic block diagram which shows the 12th Example of the coal carbonization apparatus which concerns on this invention.

Embodiments for carrying out the coal carbonization apparatus according to the present invention will be described in each example.

The coal carbonization apparatus according to the first embodiment of the present invention will be described with reference to FIG.

The coal carbonization apparatus according to the present embodiment is a rotary kiln, and includes an indirect heating type carbonization apparatus body 111 as shown in FIG. The dry distillation apparatus main body 111 includes an inner cylinder 112, an outer cylinder 113 provided so as to cover the inner cylinder 112, and a support 114 that rotatably supports the inner cylinder 112. The outer cylinder 113 includes a gas inlet (not shown) that receives the heated gas 1 and a gas exhaust port (not shown) that exhausts the heated gas 2 that heated the inner cylinder 112. A region surrounded by the outer cylinder 113 in the inner cylinder 112 forms a coal heating unit. The dry distillation apparatus main body 111 includes a feeder 115 that supplies the dry charcoal 11 to the inner cylinder 112, a separation tank 116 provided at the opening end of the inner cylinder 112, and a hopper 117 provided in the separation tank 116.

The dry distillation apparatus main body 111 further includes an exhaust pipe 101 for exhausting a gas in the inner cylinder 112, for example, a dry distillation gas 21 described later. The exhaust pipe 101 is disposed so as to extend along the axis of the inner cylinder 112. The gas inlet (tip portion) 101a of the exhaust pipe 101 includes a substantially central portion 112a in the longitudinal direction of the inner cylinder 112 where the temperature of the dry coal 11 reaches 400 ° C. (a substantially central portion in the longitudinal direction of the outer cylinder 113), and an outer cylinder. It arrange | positions in the area | region D1 between the coal heating part exits 112c of the inner cylinder 112 located by the wall part 113a of 113. FIG. When the gas suction port 101a of the exhaust pipe 101 is disposed closer to the feeder 115 than the substantially central portion 112a of the inner cylinder 112 (the coal heating portion inlet 112b of the inner cylinder 112 positioned at the wall 113b of the outer cylinder 113), the dry distillation gas 21 This is because the tar condenses due to contact with the dry coal 11 having a low temperature (the temperature has not risen yet) and prevents the tar from releasing mercury from the dry coal 11. On the other hand, when the gas suction port 101a is disposed closer to the hopper 117 than the wall 113a on the coal discharge side of the outer cylinder 113, the dry distillation coal 21 cools, and the dry distillation gas 21 comes into contact with the cold dry distillation coal 12 to thereby bring the dry distillation gas 21 into contact. This is because the mercury inside is adsorbed. That is, by positioning the gas suction port 101a of the exhaust pipe 101 in the region D1, it is possible to more reliably suppress the gas in the inner cylinder 112 from coming into contact with the cold carbonized coal 12.

Note that a suction blower (not shown) or the like is connected to the proximal end portion of the exhaust pipe 101. Thereby, by sucking the gas in the inner cylinder 112, particularly the dry distillation gas 21 at a predetermined suction speed, for example, at a speed faster than the speed at which the coal (dry coal 11, dry distillation coal 12) moves in the inner cylinder 112. The gas in the inner cylinder 112 can be exhausted outside the system while suppressing the gas in the inner cylinder 112 from flowing from the coal heating part outlet 112c of the inner cylinder 112 to the separation tank 116 side. That is, the gas in the inner cylinder can be exhausted from the exhaust pipe 101 to the outside of the system while suppressing contact with the cold carbonized coal 12. The diameter of the exhaust pipe 101 is set to such a size that the gas in the inner cylinder 112 can be exhausted and not in contact with the dry charcoal 11 in the inner cylinder 112.

In this embodiment, the exhaust pipe 101 and the suction blower constitute a low-mercury carbonized carbon generating means.

The operation of the coal carbonization apparatus thus configured will be described below.

First, raw coal such as low-grade coal (not shown) such as lignite and bituminous coal is dried by a drying device (not shown) to become dry coal 11, and the dry coal 11 is supplied to the feeder 115. A predetermined amount of dry charcoal 11 is supplied into the inner cylinder 112 by the feeder 115.

On the other hand, the heated gas 1 generated in a combustion furnace (not shown) or the like is supplied into the outer cylinder 113. The heated gas 1 heats the inner cylinder 112 and indirectly heats the dry charcoal 11 in the inner cylinder 112. Thereby, the carbonized carbon 12 is generated and the carbonized gas 21 is generated. The heating gas 1 is adjusted so that the temperature of the coal (dry coal 11 and dry distillation coal 12) in the inner cylinder 112 is 400 to 450 ° C. at the coal heating unit outlet 112c. The dry-distilled coal 12 sequentially moves in the inner cylinder 112 toward the separation tank 116 and is discharged from the separation tank 116 to the hopper 117. The dry distillation gas 21 is exhausted out of the system through the exhaust pipe 101. By arranging the gas suction port 101a of the exhaust pipe 101 in the region D1, that is, in a place where the temperature of coal (dry coal 11, dry coal 12) is high, the dry distillation gas 21 having a high mercury concentration is placed near the coal heating unit outlet 112c. It will be exhausted outside the system before it is distributed. Therefore, it can control that dry distillation gas 21 contacts cold coal (dry coal 11 and dry distillation coal 12). Further, on the coal heating part outlet 112c side (separation tank 116 side) of the inner cylinder 112, the flow of the dry distillation gas 21 is opposite to the movement direction of the coal, and the dry distillation gas 21 having a low mercury concentration flows. Mercury adsorption can be prevented. Therefore, the carbonized carbon 12 discharged to the hopper 117 has a low mercury content.

Hereinafter, by repeating the above-described operation, it is possible to continuously produce the carbonized carbon 12 having a low mercury content.

Therefore, according to the coal carbonization apparatus according to the present embodiment, by providing the exhaust pipe 101 in which the gas suction port 101a is disposed in the inner cylinder 112, the carbonization gas 21 is made to come into contact with the cold carbonized coal 12. It is possible to evacuate, suppress the adsorption of mercury in the dry distillation gas 21 due to the contact with the cold dry distillation coal 12, and produce the dry distillation coal 12 with a low mercury content.

A coal carbonization apparatus according to a second embodiment of the present invention will be described with reference to FIG.
In this embodiment, a carrier gas supply device is added to the coal dry distillation apparatus according to the first embodiment described above. In the present embodiment, the same reference numerals are appended to the same equipment as the coal carbonization apparatus according to the first embodiment described above.

As shown in FIG. 2, the coal carbonization apparatus according to the present embodiment further includes a carrier gas supply device 121 that is a carrier gas supply means. The carrier gas supply device 121 includes a carrier gas supply device main body 122 that supplies a carrier gas 31 that is an inert gas (for example, combustion exhaust gas that has been subjected to exhaust gas treatment such as nitrogen or mercury removal), and a carrier gas supply device main body 122. A carrier gas supply pipe 123 that communicates with the gas delivery port and communicates with the hopper 117 is provided.

The carrier gas 31 is adjusted to the discharged carbonized carbon temperature (for example, 400 ° C. to 450 ° C.). This is because if the carrier gas 31 is lower than 400 ° C., the inner cylinder 112 is cooled, resulting in poor energy efficiency. On the other hand, when the carrier gas 31 is higher than 450 ° C., heat energy is supplied to the dry distillation coal 12 to promote dry distillation of the dry coal 11, reducing the weight of the dry distillation coal and concentrating the mercury concentration. This is because the volatile matter is reduced and the carbonized carbon has poor ignitability. Accordingly, by supplying the carrier gas 31 in the predetermined temperature range described above, the cooling of the dry distillation coal 12 in the vicinity of the coal heating portion outlet 112c in the inner cylinder 112 is prevented, and the mercury concentration in the gas is lowered to reduce the mercury. Adsorption to the dry-distilled coal 12 can be suppressed.

The gas supply amount of the carrier gas 31 by the carrier gas supply device 121 is adjusted according to the gas suction amount of the suction blower connected to the exhaust pipe 101. This is because when the gas supply amount of the carrier gas 31 is smaller than the difference between the gas suction amount by the suction blower and the dry distillation gas generation amount, the carrier gas 31 suppresses contact between the cold dry distillation coal 12 and the dry distillation gas 21. It is because there is no effect. On the other hand, if the gas supply amount of the carrier gas 31 is larger than the difference between the gas suction amount by the suction blower and the dry distillation gas generation amount, the amount of the carrier gas 31 in the inner cylinder 112 increases and the generation of the dry distillation coal 12 is hindered. This is because there is a possibility that it will end up.

In this embodiment, the exhaust pipe 101, the carrier gas supply device 121, and the like constitute a low-mercury carbonized carbon generating means.

The operation of the coal carbonization apparatus thus configured will be described below. In the present embodiment, the dry coal 11 is supplied to the inner cylinder 112 by a predetermined amount by the feeder 115 in the same manner as the coal dry distillation apparatus according to the first embodiment described above. The dry charcoal 12 in the inner cylinder 112 is indirectly heated by the heated gas 1 supplied to the outer cylinder 113 to generate the dry distillation coal 12.

The dry distillation gas 21 is generated along with the generation of the dry distillation coal 12 described above. At this time, the carrier gas supply device 121 is controlled to supply the carrier gas 31 into the hopper 117, while the above-described suction blower is controlled according to the production amount of the dry distillation gas 21 and the supply amount of the carrier gas 31, and the inner cylinder Gases such as dry distillation gas 21 and carrier gas 31 in 112 are exhausted out of the system through exhaust pipe 101. At this time, the carrier gas 31 flows through the exhaust pipe 101 while being in contact with the dry distillation coal 12. Therefore, it is possible to suppress the dry distillation gas 21 from coming into contact with the dry distillation coal 12 in the vicinity of the coal heating portion outlet 112 c of the inner cylinder 112. It is possible to suppress the dry distillation gas 21 from flowing to the separation tank 116 side. Thereby, adsorption | suction of the mercury in the dry distillation gas 21 to the dry distillation coal 12 can be suppressed. Therefore, the carbonized carbon 12 discharged to the hopper 117 has a low mercury content.

Hereinafter, by repeating the above-described operation, it is possible to continuously produce the carbonized carbon 12 having a low mercury content.

Therefore, according to the coal carbonization apparatus according to the present embodiment, the carrier gas supply device 121 that supplies the carrier gas 31 into the hopper 117 is provided, and by supplying the carrier gas 31 into the hopper 117, the carbonization gas 21 is separated. Distribution to the tank 116 side can be suppressed. As a result, the adsorption of mercury in the dry distillation gas 21 due to contact with the cold dry distillation coal 12 can be suppressed, and the dry distillation coal 12 having a low mercury content can be more reliably produced.

A dry distillation coal production facility according to a third embodiment of the present invention will be described with reference to FIG.
A present Example is an example of the dry distillation coal manufacturing equipment to which the coal dry distillation apparatus which concerns on the 2nd Example mentioned above is applied. In the present embodiment, the same symbols are added to the same equipment as the coal carbonization apparatus according to the second embodiment described above.

As shown in FIG. 3, the dry distillation coal production facility according to the present embodiment includes the above-described dry distillation apparatus main body (inner cylinder 112, outer cylinder 113), the above exhaust pipe 101, and the above carrier gas supply apparatus 121. In addition, an indirect heating type drying device 311, a combustion furnace 321, a cooling device 331, a granulating device 341, a heated gas feeding device, and the like are provided. In addition, the carbonized carbon 12 produced | generated with the carbonization apparatus main body 111 is sent to the cooling device 331. The cooling device 331 cools the dry-distilled coal 12 to a predetermined temperature or less to form the cooling coal 13 and supplies the cooling coal 13 to the granulating device 341. The granulator 341 granulates the cooling charcoal 13 to a predetermined size to obtain a product 14 and discharges the product 14.

The indirect heating type drying apparatus 311 includes an inner cylinder 312 to which the raw coal 10 is supplied, and an outer cylinder 313 provided so as to cover the inner cylinder 312. By supplying the heating gas 61 obtained by the heat exchanger 323 described later to the outer cylinder 313, the heating gas 61 indirectly heats the raw coal 10 in the inner cylinder 312. As a result, dry charcoal 11 is generated and dry gas 51 is generated. A gas exhaust port of the inner cylinder 312 communicates with a gas receiving port of a combustion furnace 321 described later through a blower 314, and the dry gas 51 is supplied to the combustion furnace 321 through the blower 314. The coal discharge port of the inner cylinder 312 communicates with the coal supply port of the inner cylinder 112 of the above-described dry distillation apparatus body, and the dry coal 11 is fed into the inner cylinder 112 of the dry distillation apparatus body. The heated gas 62 used for heating the inner cylinder 312 is exhausted outside the system.

The combustion furnace 321 includes a burner 322 and a heat exchanger 323. The gas receiving port of the burner 322 communicates with the gas exhaust port of the exhaust pipe 101 of the above-described dry distillation apparatus main body, and the dry distillation gas 21 and the carrier gas 31 are supplied to the burner 322. The gas exhaust port of the heat exchanger 323 communicates with the gas receiving port of the outer cylinder 313 of the drying device 311, and the heated gas 61 generated by the heat exchanger 323 is supplied to the outer cylinder 313 of the drying device 311. The gas exhaust port of the combustion furnace 321 communicates with the gas inlet of the outer cylinder 113 of the above-described dry distillation apparatus main body, and the combustion exhaust gas generated in the combustion furnace 321 enters the outer cylinder 113 of the above-described dry distillation apparatus main body as the heated gas 1. Be sent.

The gas exhaust port of the outer cylinder 113 of the above-mentioned dry distillation apparatus main body communicates with the gas inlet of the steam generator 351 which is a cooling means via the gas supply pipe 361, and the heating used for heating the inner cylinder 112. The gas 2 is supplied to the steam generator 351. The heated gas 2 is cooled to a predetermined temperature or lower by the steam generator 351 and becomes the primary cooling gas 3. A gas exhaust port of the steam generator 351 communicates with a gas intake port of the blower 352 through a communication pipe 362. A gas exhaust port of the blower 352 communicates with a gas receiving port of the exhaust gas purification processing device 353 via a supply pipe 363. That is, the primary cooling gas 3 is supplied to the exhaust gas purification processing device 353 as purification processing means through the blower 352. The exhaust gas purification treatment device 353 generates the purified gas 4 that is purified by removing NOx, SOx, mercury, and particulate matter (PM) from the primary cooling gas 3.

The gas exhaust port of the exhaust gas purification treatment device 353 communicates with a chimney (not shown) via a purified gas exhaust pipe 364. A flow rate adjusting valve (three-way valve) 354 is provided in the middle of the purified gas exhaust pipe 364, and the flow rate adjusting valve 354 communicates with the purified gas supply pipe 365. The purified gas supply pipe 365 is in communication with the carrier gas supply pipe 123. That is, a part of the purified gas 4 is exhausted outside the system through the chimney. The remaining portion of the purified gas 4 is fed to the carrier gas feed pipe 123 via the flow rate adjustment valve 354 and the purified gas feed pipe 365. Therefore, the carrier gas 31 and the purified gas 4 are supplied as the carrier gas into the inner cylinder 112 of the above-described dry distillation apparatus main body.

In this embodiment, the gas supply pipe 361, the steam generator 351, the communication pipe 362, the blower 352, the supply pipe 363, the exhaust gas purification treatment device 353, the purified gas exhaust pipe 364, The flow rate adjusting valve 354, the purified gas supply pipe 365, the carrier gas supply pipe 123, and the like constitute a heated gas supply device that is a heated gas supply means.

Therefore, according to the dry distillation coal production facility according to the present embodiment, the purified gas 4 obtained by heat exchange and purification treatment of the heated gas 2 is supplied together with the carrier gas 31 into the inner cylinder 112 of the above-described dry distillation apparatus main body. By doing in this way, energy saving can be achieved compared with the case where all carrier gas is supplied separately.

A coal carbonization apparatus according to a fourth embodiment of the present invention will be described with reference to FIG.
This embodiment has a configuration in which a preheating drying device is added to the previous stage instead of the exhaust pipe provided in the coal carbonization device according to the first embodiment described above. In the present embodiment, the same reference numerals are appended to the same equipment as the coal carbonization apparatus according to the first embodiment described above.

As shown in FIG. 4, the coal carbonization apparatus according to the present embodiment includes a carbonization apparatus main body 111 and a preheating drying apparatus 131 that is a preheating drying unit provided in the front stage of the carbonization apparatus main body 111.

The preheating drying device 131 is a rotary kiln and includes an inner cylinder 132, an outer cylinder 133 provided so as to cover the inner cylinder 132, and a support 134 that rotatably supports the inner cylinder 132. The outer cylinder 133 includes a gas inlet (not shown) that receives the preheating heating gas 6 and a gas exhaust port (not shown) that exhausts the preheating heating gas 7 that heated the inner cylinder 132. A region surrounded by the outer cylinder 133 in the inner cylinder 132 forms a coal heating unit. The preheating drying device 131 includes a feeder 135 that supplies the dry charcoal 11 to the inner cylinder 132, a separation tank 136 provided at the opening end of the inner cylinder 132, and a hopper 137 provided in the separation tank 136. A gas exhaust port 138 is provided in the upper part of the separation tank 136. A gas exhaust pipe 139 communicates with the gas exhaust port 138.

The dry distillation apparatus main body 111 includes the inner cylinder 112, the outer cylinder 113, the support 114, the feeder 115, the separation tank 116, and the hopper 117. The separation tank 116 communicates with a gas exhaust pipe 119 via a gas exhaust port 118 provided at the upper part. The feeder 115 of the dry distillation apparatus main body 111 communicates with the coal discharge port of the hopper 137 of the preheating drying apparatus 131, and the preheated dry coal 15 is supplied to the feeder 115 of the dry distillation apparatus main body 111.

In this embodiment, the preheat drying device 131 or the like serves as the low-mercury carbonized carbon generating means.

The operation of the coal carbonization apparatus thus configured will be described below.

First, raw coal such as low-grade coal (not shown) such as lignite and bituminous coal is dried by a drying device (not shown) to become dry coal 11, and the dried coal 11 is supplied to the feeder 135 of the preheating drying device 131. To do. The feeder 135 supplies the dry charcoal 11 to the inner cylinder 132 of the preheating dryer 131 by a predetermined amount.

On the other hand, the preheating heating gas 6 generated in a combustion furnace (not shown) or the like is supplied into the outer cylinder 133 of the preheating dryer 131. The preheating heating gas 6 heats the inner cylinder 132 and indirectly heats the dry charcoal 11 in the inner cylinder 132. The preheating heating gas 6 is adjusted so that the dry coal 11 at the coal heating section outlet 132c has a temperature of 280 to 350 ° C. Thereby, the preheated dry coal 15 is generated and the preheated gas 22 is generated. Here, when the dry coal 11 is heated to 350 ° C., about 80% of mercury in the coal is released, so the preheating gas 22 is a gas with a high mercury concentration. Such preheated gas 22 is exhausted outside the system through the separation tank 136, the gas exhaust port 138, and the gas exhaust pipe 139. The preheated dry coal 15 sequentially moves in the inner cylinder 132 toward the separation tank 136 and is discharged to the hopper 137.

Subsequently, the preheated dry coal 15 in the hopper 137 described above is fed to the feeder 115 of the dry distillation apparatus main body 111.

The feeder 115 of the carbonization apparatus main body 111 supplies the preheated dry coal 15 to the inner cylinder 112 of the carbonization apparatus main body 111 by a predetermined amount. On the other hand, the heated gas 1 generated in a combustion furnace (not shown) or the like is supplied into the outer cylinder 113 of the apparatus main body 111. The heated gas 1 heats the inner cylinder 112 and indirectly heats the preheated dry coal 15 in the inner cylinder 112. The heated gas 1 is adjusted so that the preheated dry coal 15 at the coal heating section outlet 112c is 400 to 450 ° C. Thereby, the carbonized carbon 16 is generated and the carbonized gas 23 is generated. The dry-distilled coal 16 sequentially moves in the inner cylinder 112 toward the separation tank 116 and is discharged from the separation tank 116 to the hopper 117. The dry distillation gas 23 is exhausted out of the system through the gas exhaust port 118 and the gas exhaust pipe 119 of the separation tank 116.

Since the above preheated dry coal 15 is obtained by discharging the preheated gas 22 having a high mercury concentration in the preheated drying device 131, the dry distillation gas 23 becomes a gas having a lower mercury concentration than the preheated gas 22. Therefore, even if the coal in the inner cylinder 112 of the carbonization apparatus main body 111 moves to the hopper 117 side and contacts the carbonization gas 23 and adsorbs the mercury in the carbonization gas 23, the mercury concentration in the carbonization gas 23 is low. Since it is low, the carbonized carbon 16 discharged to the hopper 117 of the carbonization device main body 111 has a low mercury content.

Hereinafter, by repeating the above-described operation, it is possible to continuously produce the carbonized carbon 16 having a low mercury content.

Therefore, according to the coal carbonization apparatus according to the present embodiment, the carbonization apparatus main body 111 and the preheating drying apparatus 131 provided in the previous stage of the carbonization apparatus main body 111 are provided, and the preheating drying apparatus 131 releases mercury from the dry coal 11. By heating at a temperature (280 to 350 ° C.) at a rate of about 80%, releasing mercury from the dry coal 11 to form preheated dry coal 15, and indirectly heating the preheated dry coal 15 by the dry distillation apparatus main body 111. As a result, the temperature drop of the preheated dry coal 15 in the preheat drying device 131 is smaller than that in the case of producing dry-distilled coal with one conventional rotary kiln, and the adsorption of mercury to the coal is suppressed. Therefore, dry-distilled coal 16 with a low mercury content can be obtained.

A coal distillation apparatus according to a fifth embodiment of the present invention will be described with reference to FIGS. 5 and 6.
In this embodiment, a classification device is added in place of the exhaust pipe provided in the coal dry distillation apparatus according to the first embodiment. In the present embodiment, the same reference numerals are appended to the same equipment as the coal carbonization apparatus according to the first embodiment described above.

As shown in FIG. 5, the coal carbonization apparatus according to the present embodiment includes the above-described carbonization apparatus main body 111 and a classification apparatus 141 that is a classification unit that classifies the below-described carbonization coal 12 a discharged from the hopper 117. It has.

The classification device 141 includes a classification tank 142 and a pan plate (classification plate) 143 provided in the classification tank 142. The classification tank 142 is divided into a main classification chamber 142a and a sub-classification chamber 142b by the countersink plate 143. The top plate 143 is disposed below the dry distillation coal receiving port of the classification tank 142. The countersink plate 143 is disposed to be inclined toward the coarse powdered carbonization discharge port side. The eye plate 143 has a plurality of through holes. The diameter of the through hole is set to a predetermined size, for example, 0.42 mm to 2.0 mm.

The above-described classifier 141 further includes a pulverized carbonized carbon discharge pipe 144, a gas feed blower 145, and a gas feed pipe 146. The pulverized dry distillation coal discharge pipe 144 communicates with the gas feed pipe 146 while communicating with the fine powder dry distillation coal discharge port at the bottom of the sub-classification chamber 142 b of the classification tank 142. The gas supply pipe 146 communicates with the gas supply port of the gas supply blower 145 and also communicates with the gas exhaust pipe 119.

In this embodiment, the classifier 141 or the like serves as a low-mercury carbonized carbon generating means. The pulverized carbonized carbon discharge pipe 144, the gas feed blower 145, the gas feed pipe 146, etc. constitute a pulverized carbonized carbon discharge means.

The operation of the coal carbonization apparatus thus configured will be described below. In the present embodiment, the dry coal 11 is supplied into the inner cylinder 112 by a predetermined amount by the feeder 115 in the same manner as the coal dry distillation apparatus according to the first embodiment described above.

The heated gas 1 is supplied to the outer cylinder 113. As a result, the dry coal 11 in the inner cylinder 112 is indirectly heated, and the dry distillation coal 12 is generated and the dry distillation gas 21 is generated. The dry distillation coal 12 sequentially moves in the inner cylinder 112 to the separation tank 116 side. The dry distillation gas 21 sequentially moves in the inner cylinder 112 toward the separation tank 116 while contacting the dry distillation coal 12. Since the carbonized coal 12 cools down to the separation tank 116 after passing through the coal heating unit outlet 112c of the inner cylinder 112, a part of mercury in the carbonized gas 21 is adsorbed accordingly, and the mercury adsorption carbonization. Charcoal 12 a is obtained, and mercury adsorption carbonized carbon 12 a is discharged to hopper 117. The dry distillation gas 21 becomes a low mercury containing dry distillation gas 21a because the mercury in the gas 21 is adsorbed on the dry distillation coal 12, and the low mercury containing dry distillation gas 21a flows to the gas exhaust pipe 119 via the gas exhaust port 118. .

Here, the amount of mercury adsorbed on the carbonized carbon will be described with reference to FIG. 6 showing the relationship between the particle size of the coal (carbonized carbon) and the mercury content (mg / kg). As shown in FIG. 6, when the particle size of coal is 0.42 mm or less, the mercury content is 0.028 mg / kg, and from 0.42 mm to 2.0 mm, the mercury content is 0.024 mg / kg. It is confirmed that the mercury content is 0.008 mg / kg at 0.0 mm to 3.0 mm. That is, it is confirmed that mercury in the dry distillation gas is preferentially adsorbed to pulverized coal having a large specific surface area and a small particle diameter.

Subsequently, the mercury adsorption carbonized carbon 12a (fine powdered carbonized coal 12aa, coarse powdered carbonized coal 12ab) in the hopper 117 is transferred into the classification tank 142 of the classifier 141 and supplied onto the top plate 143. The gas feed blower 145 feeds the inert gas 32 to the gas feed pipe 146 at a gas flow rate at which the classification of the mercury adsorption carbonized carbon 12a can occur. As a result, a negative pressure is generated in the sub-classification chamber 142b of the classification tank 142, and the dry distillation coal 12a is classified by the countersink plate 143. That is, pulverized dry carbonized coal 12aa smaller than the through-hole of the countersink plate 143 falls into the sub-classification chamber 142b, and coarse-powdered carbonized coal 12ab larger than the through-hole of the countersink plate 143 remains in the main classification chamber 142a. become. Therefore, by setting the diameter of the through-hole of the countersink plate 143 to 0.42 mm, a large amount of mercury adsorbed with a particle diameter of 0.42 mm or less is used as finely-pulverized carbonized coal 12aa in the sub-classification chamber 142b. Can be dropped. Preferably, by setting the diameter of the through-hole of the countersink plate 143 to 2.0 mm, a subclassification chamber 142b having a particle diameter of 2.0 mm or less and having a large amount of adsorbed mercury as fine dry carbonized coal 12aa. Can be dropped into. The inert gas 32 is a gas that is not reactive with the pulverized carbonized coal 12aa, and examples thereof include nitrogen.

The pulverized carbonized coal 12aa in the sub-classification chamber 142b is fed to the gas exhaust pipe 119 together with the inert gas 32 via the pulverized carbonized coal discharge pipe 144 and the gas feed pipe 146. The finely powdered carbonized coal 12aa is discharged out of the system together with the inert gas 32 and the low mercury-containing carbonized gas 21a.

On the other hand, the coarse powdered carbonized coal 12ab in the main classification chamber 142a is discharged out of the system from the coarse powdered carbonized coal discharge port at the bottom of the main classification chamber 142a.

Therefore, according to the coal carbonization apparatus according to the present embodiment, by including the carbonization apparatus main body 111 and the classifying apparatus 141, the carbonized coal 12a obtained by the carbonization apparatus main body 111 is transferred to the classifying apparatus 141, and the classifying apparatus is provided. In 141, fine powdered carbonized coal 12aa having a large amount of mercury adsorption can be classified and removed from the mercury-adsorbed carbonized coal 12a. Thereby, the coarse-powdered carbonized coal 12ab with a small amount of mercury adsorption can be obtained as a carbonized coal with a low mercury content.

A coal carbonization apparatus according to a sixth embodiment of the present invention will be described with reference to FIG.
The present embodiment has a configuration in which the arrangement of the classification device included in the coal carbonization apparatus according to the fifth embodiment described above is changed. In this embodiment, the same symbols are added to the same equipment as the coal carbonization apparatus according to the fifth embodiment.

As shown in FIG. 7, the coal carbonization apparatus according to the present embodiment includes the above-described carbonization apparatus main body 111 and a classification apparatus 151 that is a classification unit disposed between the inner cylinder 112 and the hopper 117. To do.

The above-described classification device 151 includes a classification tank 152 and a pan plate 153 provided in the classification tank 152. The classification tank 152 is divided into a main classification chamber 152a and a sub-classification chamber 152b by a plate plate 153. The countersink plate 153 is disposed below the dry distillation coal receiving port (opening end portion of the inner cylinder 112) of the classification tank 152. The countersink plate 153 is disposed so as to be inclined from the dry carbonization inlet side toward the coarse powder carbonization coal discharge port side for discharging coarse powder carbonization coal 12ad described later in the classification tank 152. The eye plate 153 has a plurality of through holes. The diameter of the through hole is set to a predetermined size, for example, 2.0 mm.

The classifier 151 described above further includes a gas supply pipe 154, a gas supply blower 155, and a gas exhaust pipe 157 that communicates with the gas exhaust port 156 of the classification tank 152. The gas feed pipe 154 communicates with the inert gas receiving port at the bottom of the sub-classification chamber 152 b of the classification tank 152 and also with the gas feed port of the gas feed blower 155.

In this embodiment, the classifier 151 or the like serves as a low-mercury carbonized carbon generating means. The gas feed blower 155, the gas feed pipe 154, the countersink plate 153, the gas exhaust port 156, the gas exhaust pipe 157 and the like constitute fine pulverized coal discharge means.

The operation of the coal carbonization apparatus thus configured will be described below. In the present embodiment, the dry coal 11 is supplied into the inner cylinder 112 by a predetermined amount by the feeder 115 in the same manner as the coal dry distillation apparatus according to the fifth embodiment.

The heated gas 1 is supplied to the outer cylinder 113. As a result, the dry coal 11 in the inner cylinder 112 is indirectly heated, and the dry distillation coal 12 is generated and the dry distillation gas 21 is generated. The dry distillation coal 12 sequentially moves in the inner cylinder 112 toward the classification tank 152 side. The dry distillation gas 21 moves in the inner cylinder 112 sequentially toward the classification tank 152 while contacting the dry distillation coal 12. Since the dry distillation coal 12 cools from the coal heating part outlet 112c of the inner cylinder 112 to the classification tank 152, a part of mercury in the dry distillation gas 21 is adsorbed accordingly, and the mercury adsorption dry distillation. Charcoal 12 a is obtained, and the mercury adsorbing carbonized carbon 12 a is sent onto the plate 153 of the classification tank 152. The dry distillation gas 21 becomes a low mercury containing dry distillation gas 21a because the mercury in the gas 21 is adsorbed on the dry distillation coal 12, and the low mercury containing dry distillation gas 21a flows to the gas exhaust pipe 157 via the gas exhaust port 156. .

Here, as described in Example 5 above, the amount of mercury adsorbed on the carbonized carbon depends on the particle size of the carbonized coal, and the mercury in the carbonized gas is finely powdered carbonized having a particle size of 2.0 mm or less. Most of the carbon 12ac is adsorbed. Note that the amount of mercury adsorbed on the coarse powdered carbonized coal 12ad having a particle size larger than 2.0 mm is smaller than that in the case of the fine powdered carbonized coal 12ac.

Subsequently, the gas feed blower 155 feeds the inert gas 33 at a gas flow rate of approximately 400 ° C. at which the classification of the mercury adsorption carbonized carbon 12 a can occur into the classification tank 152 through the gas feed pipe 154. Thereby, only the pulverized dry-distilled coal 12ac out of the mercury adsorption dry-distilled coal 12a emerges. For example, by adjusting the gas flow rate of the inert gas 33 supplied by the gas supply blower 155 to 7 m / s, a large amount of mercury adsorbed with a particle size of 2.0 mm or less can be used as the fine dry carbonized carbon 12ac. Will emerge as. The pulverized carbonized carbon 12ac is discharged out of the system through the gas exhaust pipe 157 from the gas exhaust port 156 together with the dry distillation gas 21a and the inert gas 33.

On the other hand, the coarse powdered carbonized coal 12ad on the mesh plate 153 is sent to the hopper 117 and discharged out of the system.

Therefore, according to the coal carbonization apparatus according to the present embodiment, the classification device 151 is provided between the inner cylinder 112 and the hopper 117, so that the carbonization coal 12a obtained by the carbonization apparatus body 111 is sent to the classification device 151. The classifying device 151 can classify and remove the fine powdered carbonized coal 12ac having a large amount of mercury adsorption from the mercury-adsorbed carbonized coal 12a. Thereby, coarse-powdered carbonized coal 12ad with a small amount of mercury adsorption can be obtained as carbonized coal with a low mercury content.

A coal carbonization apparatus according to a seventh embodiment of the present invention will be described with reference to FIG.
This embodiment has a configuration in which a dry distillation coal discharge promotion device is added instead of the exhaust pipe provided in the coal dry distillation device according to the first embodiment described above. In the present embodiment, the same reference numerals are appended to the same equipment as the coal carbonization apparatus according to the first embodiment described above.

As shown in FIG. 8, the coal carbonization apparatus according to the present embodiment includes the above-described carbonization apparatus body 111 and also includes a carbonization promotion apparatus 181. Note that the hopper 117 serves as a carbonized carbon discharge means.

The dry distillation coal distribution promotion device 181 is a device that rapidly distributes the dry distillation coal 12 in the inner cylinder 112 to the hopper 117 side, and is, for example, a screw feeder. The tip 181 a of the device 181 is positioned at the coal heating part outlet 112 c of the inner cylinder 112. Thereby, in the region that is not heated by the heated gas 1, the residence time in the region can be shortened by the dry distillation coal distribution promotion device 181, thereby cooling the dry distillation coal 12 itself can be suppressed. The contact time between the carbonized carbon 12 and the carbonized gas 21 can be shortened. As a result, the adsorption of mercury in the dry distillation gas 21 to the dry distillation coal 12 discharged from the separation tank 116 to the hopper 117 can be suppressed.

In the present embodiment, low-mercury carbonized carbon generating means is provided by the carbonized carbon circulation promoting device 181 and the like.

Therefore, according to the coal carbonization apparatus according to the present embodiment, the carbonization apparatus body 111 and the carbonization promotion apparatus 181 are provided, and the carbonized coal 12 is quickly transferred from the coal heating unit outlet 112c of the inner cylinder 112 to the separation tank 116. It can be distributed and discharged to the hopper 117. Thereby, since adsorption | suction of mercury to the dry distillation coal resulting from cooling of dry distillation coal can be suppressed, the dry distillation coal 12 with little mercury content can be obtained.

A coal distillation apparatus according to an eighth embodiment of the present invention will be described with reference to FIGS. 9A and 9B.
In this embodiment, a dry distillation gas contact suppression plate is added in place of the exhaust pipe provided in the coal dry distillation apparatus according to the first embodiment. In the present embodiment, the same reference numerals are appended to the same equipment as the coal carbonization apparatus according to the first embodiment described above.

As shown in FIGS. 9A and 9B, the coal carbonization apparatus according to the present embodiment includes the above-described carbonization apparatus main body 111 and also includes a carbonization gas contact suppression plate 191.

The dry distillation gas contact suppression plate 191 is fixed to the side wall of the separation tank 116 at the base end side and extends along the extending direction of the inner cylinder 112. The front end 191a side of the plate body 191 has a shape extending obliquely upward. The plate body 191 is disposed so as to be in contact with the upper surface portion 12c of the dry distillation coal layer formed by laminating the dry distillation coal 12 generated in the inner cylinder 112. As a result, the dry distillation coal 12 passes through the coal heating section by the heated gas 1 and cools until it is discharged to the separation tank 116 and the hopper 117. However, the plate body 191 makes contact with the dry distillation gas 21. Will be suppressed. The carbonized carbon 12 is discharged from the separation tank 116 to the hopper 117.

In this embodiment, the low-carbon mercury dry distillation coal generating means is constituted by the dry distillation gas contact suppression plate 191 or the like.

Therefore, according to the coal carbonization apparatus which concerns on a present Example, it comprises the carbonization apparatus main body 111 and the carbonization gas contact suppression board 191, and contact with the carbonization coal 12 and the carbonization gas 21 which cools with the said board 191 is carried out. Since it can suppress and adsorption | suction of the mercury in the dry distillation gas 21 by contact with the cold dry distillation coal 12 can be suppressed, the dry distillation coal 12 with little mercury content can be obtained.

A coal distillation apparatus according to a ninth embodiment of the present invention will be described with reference to FIGS. 10A and 10B.
In this embodiment, an inert gas supply device is added to the coal dry distillation apparatus according to the eighth embodiment described above. In the present embodiment, the same equipment as the coal carbonization apparatus according to the above-described eighth embodiment is denoted by the same reference numeral.

As shown in FIGS. 10A and 10B, the coal carbonization apparatus according to the present embodiment includes the above-described dry distillation apparatus main body 111 and the above-described dry distillation gas contact suppression plate 191, and also includes an inert gas supply apparatus 201. To do.

The inert gas supply device 201 is provided in communication with the gas delivery port of the hopper 117. The inert gas supply device 201 is a device that supplies the inert gas 34 at about 400 ° C. into the hopper 117. The inert gas 34 is a gas that has no reactivity with the carbonized carbon 12 and includes, for example, nitrogen. By supplying the inert gas 34 into the hopper 117, the inert gas 34 passes between the plate body 191 and the inner cylinder 112 and flows to the feeder 115 side. Thereby, it is possible to suppress the dry distillation gas 21 from entering between the inner cylinder 112 and the plate body 191. The carbonized carbon 12 is discharged from the separation tank 116 to the hopper 117. The inert gas 34 is discharged out of the system through the gas exhaust port 118 and the gas exhaust pipe 119 together with the dry distillation gas 21.

In this embodiment, the dry distillation gas contact suppression plate 191 and the inert gas supply device 201 form a low mercury content dry distillation coal generating means.

Therefore, the coal carbonization apparatus according to the present embodiment includes the carbonization apparatus main body 111, the carbonization gas contact suppression plate 191 and the inert gas supply device 201, and supplies the inert gas 34 to the hopper 117. The active gas 34 circulates between the plate body 191 and the inner cylinder 112, so that the same effect as that of the coal dry distillation apparatus according to the eighth embodiment described above can be obtained, and between the plate body 191 and the inner cylinder 112. From the fact that the dry distillation gas 21 can be discharged to the feeder 115 side by the inert gas 34 even if there is the dry distillation gas 21 between the plate body 191 and the inner cylinder 112 while suppressing the inflow of the dry distillation gas 21 to the The dry-distilled coal 12 with a low mercury content can be obtained more reliably.

A coal carbonization apparatus according to a tenth embodiment of the present invention will be described with reference to FIG.
This embodiment has a configuration in which a heating device is added instead of the exhaust pipe provided in the coal dry distillation apparatus according to the first embodiment described above. In the present embodiment, the same reference numerals are appended to the same equipment as the coal carbonization apparatus according to the first embodiment described above.

As shown in FIG. 11, the coal carbonization apparatus according to the present embodiment includes the above-described carbonization apparatus main body 111 and a heating apparatus 211.

The heating device 211 is a device that can directly heat the carbonized coal 12 and the inner cylinder 112 in the vicinity of the coal heating unit outlet 112c, and includes a burner 212. The temperature of the burner 212 is 1200 to 1300 ° C., and the carbonized coal 12 is heated to about 400 to 450 ° C. and kept warm. The carbonized carbon 12 is discharged from the separation tank 116 to the hopper 117.

In this embodiment, the heating device 211 or the like serves as a low-mercury carbonized carbon generating means.

Therefore, according to the coal carbonization device according to the present embodiment, the carbonization device main body 111 and the heating device 211 are provided, and the carbonization coal 12 and the inner cylinder 112 in the vicinity of the separation tank 116 are heated by the burner 212 provided in the heating device 211. By doing so, it is not cooled until the carbonized carbon 12 is discharged into the separation tank 116, and the adsorption of mercury in the carbonized gas due to contact with the cold carbonized coal can be suppressed. The carbonized carbon 12 having a low mercury content can be obtained.

A coal carbonization apparatus according to an eleventh embodiment of the present invention will be described with reference to FIGS. 12A and 12B.
The present embodiment has a configuration in which the heating device included in the coal carbonization apparatus according to the tenth embodiment described above is changed. In the present embodiment, the same equipment as the coal carbonization apparatus according to the tenth embodiment described above is denoted by the same reference numeral.

As shown in FIGS. 12A and 12B, the coal carbonization apparatus according to the present embodiment includes the above-described carbonization apparatus main body 111 and a heating apparatus 221.

The heating device 221 is a device that can directly heat the dry-distilled coal 12 in the vicinity of the coal heating part outlet 112c of the inner cylinder 112, and is constituted by a rotary indirect heat exchange tube 222, for example. A plurality of heat exchange tubes 222 are arranged in the inner cylinder 112 and are provided so as to be rotatable in the circumferential direction around the axis of the inner cylinder 112. The front end portion 222a of the heat exchange tube 222 is disposed closer to the separation tank 116 than the coal heating unit outlet 112c. The heat exchange tube 222 is supplied with the heating gas 8 adjusted to a predetermined temperature, such as combustion exhaust gas or dry distillation furnace heating gas exhaust gas. Therefore, while supplying the heating gas 8 into the heat exchange tube 222 and rotating the heat exchange tube 222, the carbonized carbon 12 near the separation tank 116 in the inner cylinder 112 is heated by the heating gas 8. Thus, the carbonized carbon 12 in contact with the heat exchange tube 222 is directly heated. Thereby, the carbonized carbon 12 is maintained at about 400 to 450 ° C. The carbonized carbon 12 is discharged from the separation tank 116 to the hopper 117. In addition, the heating gas 9 which heated the heat exchange tube 222 is discharged | emitted out of the system.

In this embodiment, the heating device 221 or the like serves as a low-mercury carbonized carbon generating means.

Therefore, according to the coal carbonization apparatus according to the present embodiment, the carbonization apparatus main body 111 and the heating apparatus 221 are provided, and the carbonization coal 12 in the vicinity of the separation tank 116 is heated by the heat exchange tube 222 provided in the heating apparatus 221. As a result, as in the above-described coal carbonization apparatus according to the tenth embodiment, the carbonization is not cooled until the carbonized coal 12 is discharged into the separation tank 116, and carbonization by contact with the cold carbonized coal. Since adsorption of mercury in the gas can be suppressed, dry-distilled coal 12 having a low mercury content can be obtained.

A coal carbonization apparatus according to a twelfth embodiment of the present invention will be described with reference to FIG.
This embodiment has a configuration in which an oxidant supply device is added instead of the heating device provided in the coal dry distillation apparatus according to the eleventh embodiment. In the present embodiment, the same symbols are added to the same equipment as the coal carbonization apparatus according to the eleventh embodiment described above.

As shown in FIG. 13, the coal carbonization apparatus according to this embodiment includes the above-described carbonization apparatus main body 111 and an oxidant supply apparatus 231.

The oxidant supply device 231 is a device that supplies the oxidant 42 to the dry distillation coal 12 in the vicinity of the coal heating portion outlet 112c of the inner cylinder 112. The oxidant supply device 231 includes an apparatus main body 232 and an oxidant supply pipe 233 that form an oxidant supply source. The oxidant supply pipe 233 communicates with the oxidant discharge port of the apparatus main body 232. The oxidant supply pipe 233 extends along the axis of the inner cylinder 112. Near the tip of the oxidant supply pipe 233, a plurality of oxidant injection nozzles 234 are provided along the longitudinal direction. The oxidant is, for example, an oxygen-containing gas (oxygen concentration: 5% or less) such as combustion exhaust gas or mixed gas (air, nitrogen gas). The oxidizing agent is, for example, about 400 to 450 ° C., and is adjusted to a temperature at which the dry distillation coal 12 is not cooled and can react with the dry distillation coal 12. Therefore, when the oxidant supply device 231 supplies the oxidant 42 to the dry-distilled coal 12 in the vicinity of the coal heating part outlet 112c in the inner cylinder 112 via the oxidant supply pipe 233 and the oxidant injection nozzle 234, Volatile components such as part and generated tar are burned and heated, and heats the carbonized coal 12 in the vicinity of the coal heating unit outlet 112c. The heated carbonized carbon 12b is discharged from the separation tank 116 to the hopper 117.

In this embodiment, the oxidant supply device 231 or the like serves as a low-mercury carbonized carbon generating means.

Therefore, according to the coal dry distillation apparatus according to the present embodiment, the dry distillation apparatus main body 111 and the oxidant supply device 231 are provided, and the oxidant 42 is supplied to the dry distillation coal 12 in the vicinity of the coal heating unit outlet 112c. As a result, the combustion heat is generated at the location, and the heated dry distillation coal 12b is not cooled until it is discharged to the separation tank 116, and the adsorption of mercury in the dry distillation gas by the contact with the cold dry distillation coal is prevented. Since it can suppress, dry distillation coal 12b with little mercury content can be obtained.

[Other embodiments]
In the first and second embodiments described above, the coal dry distillation apparatus having the exhaust pipe 101 has been described. However, the coal dry distillation apparatus having an exhaust pipe having a plurality of holes in the peripheral surface near the tip. It is also possible.

Since the coal carbonization apparatus according to the present invention can produce carbonized carbon with a low mercury content, it can be used extremely beneficially in various industries.

DESCRIPTION OF SYMBOLS 1 Heating gas 6 Heating gas 11 for preheating Dry coal 12 Carbonized carbon 15 Preheated dry coal 16 Carbonated coal 21 Carbonated gas 31-34 Carrier gas 42 Oxidant 101 Exhaust pipe 111 Drying device main body 121 Carrier gas supply device 131 Preheating drying device 141 151 Classifier 181 Carbonization Promotion Device 191 Drying Gas Contact Suppression Plate 201 Inert Gas Supply Device 211, 221 Heating Device 231 Oxidant Supply Device

Claims (18)

It has an inner cylinder to which dry coal is supplied and an outer cylinder that covers the inner cylinder, and indirectly heats the dry coal in the inner cylinder with heated gas supplied to the outer cylinder to produce dry-distilled coal and dry-distilled gas. A coal pyrolysis device having a carbonization device main body to be generated,
Low mercury-containing carbonized carbon that produces the carbonized carbon with a low content of mercury by suppressing adsorption of mercury contained in the carbonized gas to the carbonized carbon or removing the carbonized carbon that adsorbs the mercury. A coal carbonization device comprising a generating means. A coal carbonization apparatus according to claim 1,
The low-mercury carbonized carbon generating means is an exhaust pipe for exhausting the gas in the inner cylinder;
The coal dry distillation apparatus, wherein a gas suction port of the exhaust pipe is disposed between a substantially central portion in a longitudinal direction of the inner cylinder and an outlet of a coal heating unit by the heated gas. A coal carbonization apparatus according to claim 2,
Having carbonized carbon discharge means for discharging the carbonized carbon,
A coal dry distillation apparatus further comprising carrier gas supply means for supplying a carrier gas to the dry distillation coal discharge means. A coal distillation apparatus according to claim 3,
A coal carbonization device comprising heating gas supply means for supplying the heated gas discharged from the outer cylinder to the inert gas supply means. The coal carbonization apparatus according to claim 4,
The heated gas supply means includes a cooling means for cooling the heated gas, a purification treatment means for purifying the cooling gas cooled by the cooling means, and a purified gas purified by the purification treatment means. A coal dry distillation apparatus comprising a purified gas supply pipe for supplying to an active gas supply means. A coal carbonization apparatus according to claim 1,
The low-mercury-containing dry-coal generating means is provided in the front stage of the dry-distilling apparatus main body, and preheat-drying means for generating preheated dry coal by indirectly heating the dry coal before being supplied to the inner cylinder with a preheating heating gas. Coal carbonization device characterized by being. The coal carbonization apparatus according to claim 6,
The coal dry distillation apparatus, wherein the dry coal is heated to 280 to 350 ° C. by the preheating heating gas. A coal carbonization apparatus according to claim 1,
Having carbonized carbon discharge means for discharging the carbonized carbon,
The low-mercury-containing carbonized carbon generating means includes the coarse carbonized carbon having a particle size larger than a predetermined particle size and the fine carbonized carbon having a smaller particle size than the carbonized carbon discharged from the carbonized carbon discharging unit. A coal carbonization device comprising: a classifying device for classifying the pulverized product into a pulverized dry carbonized coal, and a pulverized dry carbonized coal discharging means for discharging the pulverized dry carbonized coal classified by the classifying device. A coal distillation apparatus according to claim 8,
The classification device includes a classification plate for classifying the carbonized carbon;
Coal dry distillation apparatus, wherein the classification plate has a through hole of 0.42 mm to 2 mm. A coal carbonization apparatus according to claim 1,
Having carbonized carbon discharge means for discharging the carbonized carbon,
The low-mercury carbonized carbon generating means is disposed between the inner cylinder and the carbonized carbon discharging means, and the carbonized coal discharged from the inner cylinder is coarsely powdered carbonized carbon having a size of a predetermined particle diameter or more. A coal classifier comprising: a classifying device for classifying into pulverized dry-distilled coal having a size smaller than a predetermined particle size; and a pulverized dry-distilled coal discharging means for discharging the finely-powdered carbonized coal classified by the classifying device. apparatus. A coal carbonization apparatus according to claim 1,
Having carbonized carbon discharge means for discharging the carbonized carbon,
The low-mercury-containing dry distillation coal generating means is a dry distillation coal distribution promoting device that rapidly distributes the dry distillation coal in the inner cylinder to the dry distillation coal discharge means side. A coal carbonization apparatus according to claim 11,
The coal dry distillation apparatus characterized in that a tip portion of the dry distillation coal distribution promotion device is disposed in the vicinity of a furnace wall on the dry distillation coal discharge port side of the outer cylinder. A coal carbonization apparatus according to claim 1,
Having carbonized coal discharge means for discharging the carbonized coal in the inner cylinder;
The low-mercury carbonized carbon generating means is a plate that is fixed to the carbonized carbon discharging means and extends in the longitudinal direction of the inner cylinder,
The said carbon plate is arrange | positioned in contact with the said carbonization top, The coal carbonization apparatus characterized by the above-mentioned. A coal distillation apparatus according to claim 13,
A coal dry distillation apparatus further comprising an inert gas supply means for supplying an inert gas into the dry distillation coal discharge means. A coal carbonization apparatus according to claim 1,
Having carbonized carbon discharge means for discharging the carbonized carbon,
The low-mercury carbonized carbon generating means is a heating device that is provided in the carbonized carbon discharging means and that heats the carbonized carbon near the carbonized carbon discharging means. The coal carbonization apparatus according to claim 15,
The coal carbonization apparatus, wherein the heating device is a burner. The coal carbonization apparatus according to claim 15,
The coal dry distillation apparatus, wherein the heating apparatus is a heat exchange tube provided rotatably and through which a heating gas can flow. A coal carbonization apparatus according to claim 1,
Having carbonized carbon discharge means for discharging the carbonized carbon,
The low-mercury-containing dry distillation coal generating means is an oxidant supply device that supplies an oxidant to the dry distillation coal in the vicinity of the dry distillation coal discharge means.

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