JP2001254082A - Rotary carbonizer - Google Patents

Abstract

(57) [Summary] [Problem] To easily adjust the temperature corresponding to the dry distillation state of each of the axial sones (regions) in a rotary carbonization furnace, and within each region, a desired uniformity over the entire region is obtained. An object of the present invention is to provide a carbonization apparatus which keeps a carbonized state and has a simple structure. By inserting an air blowing pipe having an air nozzle from the inlet direction of the rotary carbonization furnace to the back, the rotary carbonization furnace is provided. The temperature can be measured directly in any of the sonars in the axial direction, so that the amount of air can be controlled quickly and easily and arbitrarily, the control of the distillation speed and the temperature can be easily performed, and the generated carbonized gas can be removed by the secondary combustion tower. Provided is a rotary carbonization device that can be cooled under controlled combustion and reliably avoid generation of harmful substances. The carbonization furnace main body includes a material supply device, a rotary carbonization furnace main body disposed in a lateral direction, and a tower-type secondary combustion chamber disposed at a rear end of the carbonization furnace main body. Inside the furnace,
A plurality of air blowing pipes are arranged, and the plurality of air blowing pipes each have an air blowing hole capable of blowing a regulated amount of air into a space separated from a furnace bottom in each of a plurality of areas inside the furnace. A rotary carbonization device characterized by the above-mentioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved rotary carbonization apparatus for efficiently and continuously producing a sufficiently homogeneous carbonized carbon from flammable organic waste without emission of harmful substances.

[0002]

2. Description of the Related Art Rotary carbonization furnaces for producing carbides are well known, and have been used for calcining limestone and cement rather than for carbonizing organic substances. These include: (i) a thrust roller for arranging the rotary kiln at an angle in consideration of the feeding of the material to be processed from the inlet to the outlet in the kiln and the removal at the outlet end in a cylindrical shape; , (Ii) instead of using a thrust roller, instead of using a thrust roller, the thickness of the refractory furnace material is sequentially adjusted in the material transport direction to perform lining to feed and take out the material to be processed into and out of the kiln. Providing a gradient (for example, JP-A-55-6877);
(Iii) Including a type that obtains a gradient for feeding and unloading a material within the kiln by adopting a cylindrical kiln having a tapered outer shape itself (for example, Japanese Patent Application Laid-Open No. 61-18886).

In any case, as compared with stoker furnaces, multi-stage furnaces, and fluidized bed furnaces, there are advantages that the structure is simple, resistant to high temperatures, resistant to clinker trouble, and the size and properties of the processed material are relatively small. For example, it is considered to be suitable for the treatment of recent high-calorific value refuse where the amount of mixed plastic waste has increased, but it has hardly been used for the purpose of carbonizing organic substances or for treating municipal waste. The main cause was that sufficient consideration was not given to combustion or carbonization conditions, treatment of carbonization gas, and suppression of emission of harmful substances closely related to these.

That is, in the carbonization control, a state of mixing with air (Turbulance) and temperature (Temperature) conventionally called "3T" are commonly used.
) and processing time (Time), as a matter of course, recently, the control of emission of harmful substances is of paramount importance. For example, as harmful substances, in addition to suspended dust such as smoke, off-flavor substances, in addition to dioxins, heavy metals, SOX, NOX etc. It is desirable that high quality coal can be obtained.

[0005] As the temperature of the solid organic matter as a carbonized material is increased by heating when carbonized, the moisture in the solid matter continues to evaporate to about 100 ° C, and sometimes to about 110 ° C, and light solid matter such as paper is reduced to about 160 ° C. At a temperature of about ℃, the solid content starts to evolve, and when further heated, the resin material etc. begins to melt,
At temperatures of about 200 ° C. to 300 ° C., considerable solids begin to thermally decompose, and upon further heating, compound moisture, volatile organic acids and mercaptans, carbon dioxide, carbon monoxide begin to form, and heavy solids such as About 300 for blue matter
At 400 ° C to 400 ° C, volatiles begin to be generated.
When the temperature reaches ℃, the generation of low and medium temperature tar becomes vigorous, and most of the N-compounds are decomposed to generate ammonia and amine. Further, when the temperature reaches approximately 500 ° C. to 600 ° C., hydrogen, methane,
The generation of heavy hydrocarbons became active, and the decomposition of part of tar began. At 600 ° C. to 700 ° C., the generation of heavy hydrocarbons becomes more and more active, resulting in an aromatic hot tar.
At 0 ° C. to 800 ° C., the decomposition of the aromatic high-temperature tar is remarkable, so that hard carbides are formed. When the temperature exceeds 800 ° C., the carbides become harder. At ~ 1200 ° C, the distillation ends completely. The formation of good carbides by this carbonization, ie, hard carbides having many microvoids, also depends on the volatilization rate of volatile components in the solid, but is generally obtained mainly by high-temperature carbonization of the solid organic matter.

On the other hand, the dioxins, heavy metals, SO
Toxic substances such as X and NOX will accompany the carbonized gas. For example, in the case of a dioxin such as PCDDs (polychlorinated dibenzodioxins) or a dioxin analog such as PCDFs (polychlorinated dibenzofurans),
As understood from having a benzene ring and a heterocyclic structure containing an oxygen atom, when carbonization is not uniform despite the relatively high carbonization temperature, that is, heat is not transferred uniformly,
The size of the mass of the material to be treated varies, or the suspended particles of the material to be treated are discharged together with the gas in the untreated state along with the dry distillation gas that is agitated due to excessive flow velocity of the gas flow. In such a case, an aromatic attribute cyclic compound is easily generated. Also, the presence of carbon monoxide enhances dioxin production. However, under a sufficient reducing atmosphere, it is difficult to form a heterocyclic structure containing an oxygen atom. It is known that the presence of heavy metals also has a catalytic action for dioxin formation. From the viewpoint of the carbonization temperature, the generation of dioxin is most likely to occur at around 300 ° C. However, at a high temperature of 800 ° C or higher, dioxin is unstable and is in a decomposed state. After being disassembled into
It is known that the generation of dioxin is avoided by rapidly lowering the temperature from the high temperature state to around 200 ° C. Unexpectedly, heavy metals can be drastically reduced under similar temperature conditions. The reason is that the Decree of the Waste Management Law enforced on December 1, 1997 states that rapid cooling to a temperature of 200 ° C. or less in a time period of 800 ° C. or more and 2 seconds or less of waste. However, according to some research papers to be respected, 1000
Some observers believe that high-temperature incineration at a temperature of at least 100 ° C and rapid cooling to 200 ° C or less in less than one second are necessary.
In the second guideline promulgated in January 1995, "Incineration temperature 850 ℃ or more (preferably 900 ℃ or more),
"Rapid cooling to 200 ° C. or less".

In any case, in order to avoid generation of dioxin during carbonization, uniform and sufficient heating of the material to be treated, maintenance of a sufficient reducing atmosphere, suspended particles of aromatic substances and graphite structural substances accompany the carbonization gas. It is necessary to dry distillation conditions that will not be discharged out of the furnace. For this purpose, the material to be treated is uniformly and relatively mild, has sufficient heating, maintains a sufficient reducing atmosphere, and the material to be treated after the treatment has progressed to a certain extent. It is indispensable to avoid extreme stirring and to appropriately control the temperature as the distillation proceeds. On the other hand, the decomposition of dioxin once formed and accompanying the carbonization gas requires holding at a high temperature for a certain period of time, that is, holding a high temperature for a certain period of time by sufficient oxygen supply, and rapid cooling thereafter is desirable. Although the cooling rate is not described, it is necessary to aim for rapid cooling within 1 second.

[0008] Therefore, when viewed in this way, it is an important issue how to satisfy both of the "avoided generation of harmful substances" and the "obtainment of good quality carbides", which basically have conflicting parts. However, it can be seen that the conditions themselves are not very complicated, and it is generally desirable to employ the different carbonization conditions and generated gas treatment conditions. In other words, in the case of carbonizing organic solids, rather than supplying sufficient air and performing complete treatment in one stage, it is divided into two stages, and the first stage is dry distillation carbonization while avoiding the generation of harmful substances such as dioxins. In the second stage, the emergence of a carbonization apparatus such as the present invention that enables setting of conditions for completely eliminating harmful substances such as dioxin in the carbonization gas should be desired. It is.

In general, the supply of combustion air to a rotary carbonization furnace is usually carried out from the inlet or outlet of the carbonization distillation furnace, or from the outer periphery of the carbonization furnace. Air control is not possible, and the latter has difficulty in uniform heat management and heat transfer (both heating and cooling) reflecting differences in external conditions, and uniform heating because heating and stirring by blowing are local. However, there is a disadvantage that the nozzle is easily clogged, but the former is overwhelmingly used because the former has less defects and is easier to use. Rotary carbonization furnaces have the advantage that they are not so much affected by the size of the raw material, but have the disadvantage that the contact between the raw material and air is poor and the temperature is difficult to control, so they are supplementary. It is known to carbonize using a heat source. Therefore, temperature control for efficiently and continuously producing carbide while avoiding generation of harmful substances in a rotary carbonization furnace has been a major issue in this technical field.

[0010] As one device for solving the above-mentioned problem, Japanese Patent Application Laid-Open No. H11-223476 discloses a process in which carbonization is performed by supplying steam from a steam blow-out hole provided in a pipe into a processing cylinder in a carbonization processing apparatus. However, there is a drawback that air blowing into each zone in the axial direction of the processing cylinder and oxygen temperature control based on stirring of the furnace atmosphere are not considered.
As described in the official gazette, when the temperature exceeds a certain temperature, the amount of air is reduced, the raw material is mixed and stirred by rocking the carbonizing furnace, and the relationship between the rocking cycle and the rocking angle is controlled. In some cases, the temperature is adjusted by adjusting the residence time of the raw material.However, in such a carbonization furnace, the operation is complicated due to the large number of adjustment factors as described above, and the raw material in each zone in the axial direction in the carbonization furnace. However, there is a disadvantage that stable temperature adjustment cannot be performed in accordance with the carbonized state.

[0011]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a carbonization apparatus which solves the above-mentioned problems in view of the above-mentioned state of the art, and further provides a shaft in a rotary carbonization furnace. It is easy to adjust the temperature corresponding to the carbonization state of each zone (region) in each direction, and in each region, a desired carbonization state is maintained uniformly over the entire region, and a carbonization apparatus with a simple structure is provided. By inserting an air injection pipe having an air nozzle from the inlet direction of the rotary carbonization furnace to the back, the temperature can be directly measured in any zone in the axial direction of the rotary carbonization furnace. Can be controlled quickly and easily and arbitrarily, the distillation rate control and temperature control are easy, and after the generated carbonized gas is burned under control in the secondary combustion tower, it is cooled to ensure the generation of harmful substances. Avoid To provide a rotary carbide device capable Rukoto.

[0012]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have made intensive studies and as a result have reached the present invention. Therefore, the above-mentioned problem is solved by (1) the “material supply device and the rotary carbonization furnace main body arranged in the lateral direction,
Having a tower-shaped secondary combustion chamber disposed at the rear end of the carbonization furnace main body, a plurality of air injection pipes are disposed inside the furnace of the carbonization furnace main body, and the plurality of air injection pipes are This is achieved by a "rotary carbonizing device having air blowing holes capable of blowing a regulated amount of air into spaces separated from the furnace bottom in each of the plurality of regions inside the furnace."

The object of the present invention is also described in (2) of the present invention, wherein the plurality of air blowing pipes are double pipes each having a water jacket for water cooling on the outer periphery, and a plurality of air blowing pipes penetrating from the inner pipe to the water jacket. The rotary carbonizing device according to the above (1), comprising a nozzle ".

The object of the present invention is also described in (3) of the present invention: "The carbonizing furnace main body is rotatably supported by a material inlet hood having a rear end capable of maintaining airtightness of a rotating portion, and a front end capable of maintaining airtightness of the rotating portion. It is rotatably supported by the material outlet hood, and
The material inlet hood fixedly holds a rear end of the plurality of air blowing pipes and a rear end of a water return pipe for heated cooling water from the water jacket, and the other of the plurality of air blowing pipes. (2) wherein a plurality of air injection pipes are located in the space inside the furnace by suspending and holding a tip end of the water return pipe at a forward end of the water return pipe. Rotary carbonization device ".

The object of the present invention is also described in (4) of the present invention, wherein the material supply device comprises material press-fitting means having a material receiving hopper at the top, and a tip of the press-fitting means is a cylindrical member connected to the material inlet hood. The press-fitting means consisting of a screw that rotates in the press-fitting means, the feed material is transferred while being compressed by the rotation of the press-fitting means consisting of the screw of the press-fitting means, and the airtightness of the void portion in the cylindrical body is maintained. The rotary carbonizing device according to any one of the above items (1) to (3) ".

The object of the present invention is also characterized in (5) that the material supply device comprises material supply means having a material receiving hopper at the top, and a tip of the supply means in a cylindrical body connected to the material inlet hood. (1) to (1) characterized in that the feed material is conveyed while being compressed so as to maintain the airtightness of the void portion in the cylindrical body by the press-fitting means comprising a screw rotating at 4) The rotary carbonization device according to any of the above items).

[0017] The object of the present invention is also characterized in that (6) the material inlet hood penetrates and fixes the tip of press-fitting means consisting of a screw rotating in a cylindrical body provided at the rear end of the material supply device. (1) through (5), wherein the end of the cooling water return pipe and the rear ends of the plurality of air blowing pipes are vertically fixed in a straight line. The rotary carbonizing device described in any of the above items can be favorably achieved.

Further, the present invention provides (7) the present invention, wherein the (1) is characterized in that the carbonization furnace main body has a cylindrical shape or a conical shape having a tapered structure in the direction of the material supply device. ) To (6).

Further, the present invention provides (8) the present invention, wherein the carbonizing furnace main body has a conical shape tapering in the direction of the material supply device, and the plurality of air blowing pipes are provided in the carbonizing furnace main body. Characterized in that the distance between each air injection hole of the plurality of air injection pipes and the inner wall of the carbonization furnace increases as the distance from the material outlet direction increases. Satisfactorily achieved by the "rotary carbonizing device described in the above item (7)."

The object of the present invention is also described in (9) of the present invention, wherein the carbonization furnace main body is a double-structured pipe composed of an outer cylinder and an inner cylinder, the outer cylinder is a metal cylinder, and the inner cylinder is It is a metal cone with an inner wall lined with heat-insulating refractory,
Also, on the inner wall of the furnace, one or more weirs of projections for transferring the material to be processed in the axial direction while continuously supplying the material to be processed from the bottom of the furnace to the furnace space by the rotation of the carbonization furnace main body are provided. The rotary carbonization device according to the above (7), wherein the rotary carbonization device is provided.

The object of the present invention is also characterized in that (10) the present invention is characterized in that the weir is lower on the material outlet hood side or not provided on the material outlet hood side. )).

[0022] Further, the above object is achieved by (11) the present invention, wherein when the carbonization device is operated, the furnace temperature in a plurality of regions inside the furnace main body is 100 ° C. to 240 ° C. in the first zone at the inlet, and in the middle zone. 400 ° C to 750 ° C, 700 ° C in exit zone
To 950 ° C., the rotary carbonizing device according to any one of the above items (1) to (10) ”.

The object of the present invention is also achieved by (12) in the present invention, wherein the carbonizing furnace main body is rotated by the rotation of a chain or gear capable of meshing with driven teeth provided outside the main body cylinder and capable of adjusting the rotation speed. The rotary carbonization device according to any one of the above items (1) to (11), which is driven, "can be satisfactorily achieved.

[0024] The object of the present invention is also characterized in that (13) the carbonizing furnace main body is supported by a carbonizing furnace receiving roller for smooth rotation of the main body cylinder outside the main body cylinder. The rotary carbonization device according to claim 12.

The object of the present invention is also described in (14) of the present invention: "The material outlet hood has a rear end opening portion of the outlet hood for rotatably supporting the front end of the carbonization furnace main body while maintaining airtightness; An outlet hood cylindrical portion having an outlet for the carbonized material which does not impair the performance and a through portion of the water return pipe through which the forward end of the water return tube is fixedly held, and blowing of secondary combustion air The outlet hood narrow portion where the nozzle is arranged, and the outlet hood tip opening portion which is fastened to the front end secondary combustion chamber inlet, are constituted by any one of the above items (1) to (13). Of the rotary carbonizing device.

[0026] Further, the present invention provides (15) a screw conveyor according to the present invention, wherein the outlet of the removing means which does not impair the secrecy of the carbonized material in the furnace has a water spray means for extinguishing the fired carbonized material. Satisfactorily achieved by the "rotary carbonizing apparatus according to the above mode (14)".

[0027] The object of the present invention is also described in (16) of the present invention, wherein a burner for secondary combustion is arranged at an opening of a tip end of an outlet hood connected to a narrow portion of an outlet hood where an air blowing nozzle for secondary combustion of the material outlet hood is arranged. The rotary carbonizing device according to the above (14), wherein the rotary carbonizing device is characterized in that it is achieved.

The object of the present invention is also achieved in (17) of the present invention, wherein the secondary combustion tower is an air ejector for keeping the carbonized furnace gas subjected to the secondary combustion treatment in the carbonization furnace and the secondary combustion tower at a negative pressure. The rotary carbonizing device according to any one of the above items (1) to (16), comprising:
Is better achieved.

The object of the present invention is also achieved in (18) of the present invention, wherein the air ejector injects air after keeping the carbonized gas subjected to secondary combustion in a secondary combustion tower at a high temperature for at least a certain time. The rotary carbonizing device according to the above (17), wherein the rotary carbonizing device is provided at the position.

[0030] The object of the present invention is also characterized in that (19) the present invention is characterized in that the (secondary combustion tower) has, after the air ejector, means for rapidly cooling the carbonized gas after secondary combustion after the air ejector. Or the rotary carbonizing device described in (18).

Further, the object of the present invention is as described in (20) of the present invention, wherein the means for quenching the carbonized gas after secondary combustion in the secondary combustion tower includes a water-cooled pipe for heat exchange.
The rotary carbonization device described in the item 9) ”is achieved favorably.

Further, the object of the present invention is as described in (21) of the present invention, wherein the means for rapidly cooling the carbonized gas after secondary combustion in the secondary combustion tower includes a rapid adiabatic expansion means.
The rotary carbonization device described in the item 9) ”is achieved favorably.

[0033] Further, according to the present invention, there is provided (22) an air-cooling means for air-cooling a radiation fin extended from a gas passage forming member, wherein the quenching means for the secondary-burned dry distillation gas in the secondary combustion tower is provided. The rotary carbonization device according to the above (19), characterized in that:

[0034] The object of the present invention is also characterized in that (23) the present invention is characterized in that the means for rapidly cooling the carbonized gas after secondary combustion in the secondary combustion tower includes means for injecting water or steam into the gas. The rotary carbonizing device described in (19) "is well achieved.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto. FIG. 1 is a longitudinal sectional view of an example of a rotary continuous carbonization apparatus equipped with the rotary carbonization furnace of the present invention, and FIG. 2 is a view of a rotary continuous carbonization apparatus equipped with the rotary carbonization furnace of the present invention of FIG. FIG. 3 is a cross-sectional view taken along the line AA (FIG. 1) for showing an example of a material inlet hood in the rotary carbonization furnace of the present invention, and FIG. 4 is a rear part of the rotary carbonization furnace main body of the present invention. FIG. 5 is a cross-sectional view taken along the line BB (FIG. 1) for showing the inside of the rotary carbonization furnace main body of the present invention.
FIG. 6 is a sectional view taken along the line DD (FIG. 1) showing a front portion of the rotary carbonizing furnace main body of the present invention, and FIG. 7 is a rotary carbonizing furnace of the present invention. FIG. 8 is a longitudinal sectional view showing an example of the size of the main body, FIG. 8 is a longitudinal sectional view showing an example of the size of each part of a rotary continuous carbonizing apparatus equipped with the rotary carbonizing furnace of the present invention, and FIG. FIG. 10 is an enlarged vertical cross-sectional view of a tip portion of the air blowing tube of the embodiment of the present invention, and FIG. 11 is an A- diagram showing a tip portion of the air blowing tube of the embodiment of the present invention. A (FIG. 10), an enlarged sectional view;
FIGS. 12, 13 and 14 show another example of the air blowing tube of the present invention, an enlarged vertical cross section of the tip of the air blowing tube of the other example, and the air blowing tube of the other example of the present invention, respectively. It is an expanded sectional view which shows the front-end | tip part of FIG.

The example of the carbonization apparatus shown in FIGS. 1 and 2 is basically a material supply apparatus (1) provided with a material press-in means (12) having a material receiving hopper (11) at the top, a rotary carbonization furnace main body. (2) and a tower type secondary combustion tower (8).
In this example, four air injection pipes (22) are arranged inside the furnace of the carbonization furnace main body (2), and these air injection pipes (22) independently adjust the air injection amount. And has an air blowing hole for blowing a desired amount of air into a substantially central area of the carbonization furnace body (2), which is separated from the furnace bottom in each of the four areas inside the furnace. Thermometer (23) for monitoring the temperature of each area
Are provided respectively. The tip of the air blowing pipe (22) is supported by a water return pipe (28) for returning the water used for cooling to the outside of the furnace.

FIGS. 9, 10 and 11 show the details of the air blowing pipe (22). Air blow pipe (22)
Are respectively water jackets for water cooling (222)
Are provided on the outer periphery, and a plurality of air nozzles (223) penetrating the water jacket (222) from the inner pipe (221) are provided in this example in a downward direction as shown in FIG. The water jacket (222) is provided with an inlet (224) for cooling water as a cooling medium and a steam outlet (225) in the water jacket (222). A socket (231) for mounting a thermocouple as the thermometer (23) in this example is fitted into the tip of (). The steam outlet (225) is connected to the water return pipe (28).

If the present invention is described by way of explanation but not limitation, the distance between the air nozzles (223) in this example is 30 mm, and each air nozzle (223) has an outer diameter of 30 mm. Meat pressure 7.5mm
And the inner tube (221) are specifically made of SUS
It is a rectangular tube having a length of 75 mm on each side and a thickness of 5 mm.
The material of the water jacket (222) is SUS304
L is a square cylinder having a side of 120 mm and a thickness of 5 mm. The inner pipe (221) may be a cylindrical pipe as shown in FIG. 12, FIG. 13, and FIG.

Returning to FIGS. 1 and 2, the ends of such air blowing pipes (22) which are inserted into the carbonization furnace main body (2) and have different lengths respectively have the temperatures of the plurality of regions in the furnace. Each thermometer (23) for monitoring has a tip.

Further, the carbonization furnace body (2) in this example
The rear end is rotatably supported by a material inlet hood (26) capable of maintaining the airtightness of the rotating portion, and the distal end is rotatably supported by a material outlet hood (27) capable of maintaining the airtightness of the rotating portion.

As shown in FIG. 3, the material inlet hood (26) has a rear end of the air blowing pipe (22) and also a heated cooling water from a water jacket (222) for cooling water. The rear end of the water return pipe (28) is fixedly held around the rear end of the material press-fitting means (12). In the figure, each air blowing pipe (22) is arranged below the water return pipe (28). By this vertical arrangement, the material to be treated, which is supplied from the furnace bottom to the furnace space by the later-described weir (39) and is conveyed in the outlet direction while being repeatedly dropped to the furnace bottom, is returned to the water return pipe (28) and Each air blowing pipe (22)
, And the uneven heating in the furnace space can be prevented as much as possible.
As shown in FIGS. 1 and 2, the other end of the plurality of air blowing pipes (22) is suspended and held at the other end of the water return pipe (28). The pipe (22) is stably positioned, for example, in a substantially middle space inside the carbonization furnace body (2). The plurality of air blowing pipes (2
In 2), the air blowing pipe for the vicinity of the furnace inlet can be made strong for dispersing or unraveling the pressed-in mass of the material to be processed, and should be used as such. Can be.

In general, in the carbonization operation, the following reaction accompanies in the dry distillation zone. Here, generation of carbon monoxide is not preferable as described above. C + O ₂ = CO ₂ ··· (1) C + CO ₂ = 2 CO · · (2) 2C + O ₂ = 2 CO · · (3) All of (1) to (3) exothermic reactions (reaction from left to right) ), But the equilibrium constant (Kp ₁ ) for the reaction ( ₁ ) is Kp ₁
= 10 ¹⁷ (1000 ° C.), the amount of oxygen can be considered to be almost 0 compared to the amount of carbon dioxide, and the reaction at a high temperature is extremely fast. The diffusion rate is the rate-determining condition for the reaction (the shorter the contact time between carbon and oxygen, the higher the reaction rate). The equilibrium of the reaction in (2) is not biased to one of the left and right sides, and the equilibrium constant Kp ₂ is negligibly small (reaction is slow) as compared with Kp _{1 in} the reaction of (1). Although the contact time with the gas does not matter much, the equilibrium constant Kp ₂ depends of course on the temperature, so that it is necessary to avoid a high temperature of 1000 ° C. or more. Equilibrium constant Kp ₃ = 3.6 × for reaction (3)
At 10 ⁹ (900 ° C.), as in the case of the reaction (1), the reverse reaction at a high temperature is negligible, and this reaction is governed by the diffusion rate of oxygen, and as understood from the reaction equation, the equilibrium constant Kp ₃
Is higher than the case of the equilibrium constant Kp ₁ of the reaction of (1).

Therefore, it is preferable that the supply of oxygen is large (the reactions (1) and (3), in particular, the reaction (1) predominates and the reaction (2) can be ignored). If the amount is too large, the coal capture rate naturally decreases as a result of the reactions (1) and (3). In addition, when the ambient temperature is high, the reaction of (3) and the reaction of (2) become dominant, so that it is desirable to perform a heat removal operation. As a heat removal operation, it is also conceivable to spout water into the dry distillation area, in which case, following absorption of water evaporation heat,
The following reactions (4) to (6) with water or steam may occur. _{C + H 2 O = CO +} H 2 ··· (4) C + 2H 2 O = CO 2 + 2H 2 ··· (5) CO 2 + H 2 = CO + H 2 O ··· (6) (4) ~ in any of (6) The reaction is also an endothermic reaction, and is an irreversible reaction at a high temperature, and usually becomes dominant at a temperature of about 1000 ° C. When a small amount of a catalytic substance such as iron is mixed, it becomes predominant even at a temperature of 450 to 500 ° C. Therefore, in order to avoid such reactions (4) to (6), water or steam cannot be blown into the dry distillation region as a practical problem. This is why the design philosophy of indirect cooling or heat exchange as in the present invention is preferred.

The material supply device (1) in this example basically comprises material supply means (12) having a material receiving hopper (11) at the top, and the supplied material is a cylindrical member of the supply means (12). The feed material is conveyed while being compressed by the rotation of the screw press-fitting means (14) arranged in (13), thereby maintaining the airtightness of the void portion in the cylindrical body.

The material inlet hood (26) is a material press-in means (12) comprising a screw press-in means (14) rotating in a cylindrical body (13) provided at the rear end of the material supply device (1). The tip of is also fixed through.

As shown in FIG. 4, the carbonization furnace main body (2) in this example includes a support frame (30) on an installation base (29).
A pair of receiving rollers (31) for the carbonization furnace main body (2), which are fixed to and rotatable following the rotation of the carbonization furnace main body (2).
(31) It is arranged on top. The carbonization furnace main body (2) in the present invention may be cylindrical, or may be a conical shape having a tapered structure in the direction of the material supply device (1). As in 2), in the case of a conical shape having a tapered structure in the direction of the material supply device (1), the material to be processed is fed and exited from the inlet to the outlet in the kiln with a cylindrical appearance. Since the kiln can be installed horizontally, there is no occurrence of "displacement" in the axial direction due to the rotation, as compared with the one using a thrust roller for arranging the rotary kiln obliquely in consideration of the take-out at the time. Of course, in the present invention, it is also possible to use a conventional cylindrical kiln in which a conventional heat-insulating refractory material is stuck with a uniform thickness and obliquely installed with a thrust roller.

When the carbonizing furnace main body (2) has a conical shape having a tapered structure in the direction of the material supply device (1), a plurality of air blowing pipes (22) are formed in the carbonizing furnace main body (2).
Each air nozzle (22) of the plurality of air blowing pipes (22) is inserted and held almost horizontally
The distance between the air injection hole of 3) and the inner wall of the carbonization furnace (2) increases as the distance from the material outlet direction increases, and as a result, the agitation of the material to be processed due to the air injection causes the progress of the processing. , The suspension of the untreated material powder in the gas and the accompanying amount of gas discharge can be reduced.

As shown in FIG. 4, the carbonization furnace main body (2) in this example is a double-structured pipe comprising a carbonization furnace outer cylinder (33) and a carbonization furnace inner cylinder (35). (33)
Is a metal cylinder, and the inner cylinder (35) is a metal cone having an inner wall lined with a heat-insulating refractory material (37). Furnace inner wall (3
In FIG. 7), four projecting weirs (39) for transferring material continuously in the axial direction are provided in this example. The weir (39) is for transferring the material to be processed in the axial direction while continuously supplying the material to be processed from the furnace bottom to the furnace space by rotation of the carbonization furnace body (2). The material to be treated at the bottom of the furnace is lined with the rotation in the direction of the arrow () (37).
Has an upright wall (41) at the front end in the rotation direction so that it can be uniformly heat-treated by being pumped up to the upper part in the furnace and then dropped, and the rear end in the rotation direction is gentle.

The weir (39) in the present invention may be a single bar or a plurality of banks. Further, the weir (39) may be spirally provided in the furnace of the carbonization furnace main body (2), but the carbonization furnace main body (2) in this example is for moving the material to be treated in the exit direction. The provision of the spiral weir (39), which has a slope already, is more complicated than the case of providing the non-spiral weir (39) because the structure and laying of the heat-insulating refractory material are more complicated. This is not essential in this example. Furthermore, the weir (39) in the device of this example is lower toward the material outlet hood (23), and even if the height of the weir (39) is gradually reduced toward the outlet, As the carbonization of the non-processed material progresses, the fluidity increases, so that there is no problem in stirring and transporting, and as a result, the stirring of the material to be processed becomes loose with the progress of the process, so that excessive stirring can be avoided. Suspension of the processing material powder in the gas and the accompanying amount of gas discharge can be reduced.

As shown in FIG. 5, the carbonization furnace main body (2)
Is a driven tooth (43) fixed to the outside of the outer cylinder (33)
Rotation drive chain (4
5) is rotated by being driven by an AC servomotor (47) as a drive source. Of course, instead of the chain (45), a gear having a torque converting means, that is, a speed changing means, can be used. In this case, the pair of receiving rollers (31) and (31) can be gears. it can. As described above, the tip of the carbonization furnace main body (2) in this example is rotatably supported by the material outlet hood (27) capable of maintaining the airtightness of the rotating portion.

Referring back to FIGS. 1 and 2, the material outlet hood (27) has a rear end opening (49) for rotatably supporting the front end of the carbonization furnace main body (2) while maintaining airtightness, and a downward direction. The outlet (51) of the carbonized material removing means, which does not impair the airtightness in the furnace, that is, the outlet (51) of the second screw conveyor, and the forward end of the water return pipe (28) (28
1) The through-hole (5
(3), a narrow portion (58) in which the secondary combustion air blowing nozzles (56) and (56) are arranged, and fastening to the inlet of the next secondary combustion tower (8). Exit hood tip opening (59). An auxiliary burner (64) is arranged in the tip opening (59). Narrow part (5
8) increases the flow rate of the carbonization gas, contributes to maintaining the negative pressure in the furnace main body (2), and facilitates the injection of the secondary combustion air by the nozzle (56). In 8), the combustion of the fuel for secondary combustion by the blown air is smoothed. However, at excessive combustion temperatures NOx
Care must be taken because cracks are easily generated and the refractory material is easily consumed. If the temperature is too high, the secondary combustion temperature is adjusted to 1000 by adjusting the amount of air supplied by the nozzle (56), adjusting the amount of fuel supplied by the auxiliary burner (64), and / or adjusting the rotation speed of the furnace body (2). It can be controlled to not more than 0 ° C. and is preferable.

As shown in FIG. 6, an outlet (51) for the carbonized material projecting into a depression (54) provided on the arrangement surface is provided with a water spray means (6) for extinguishing the fired carbonized material.
A screw-type conveyer for removing carbonized material (63) that rotates in a carbonized material take-out cylinder (61) having the above (0). In the present invention, it is possible to rotate the carbonization furnace main body (2) while maintaining confidentiality by the inlet hood (26) and the outlet hood (27), and the AC servomotor (47) as a drive source is used. It is feasible to easily perform the rotation control.

The secondary combustion tower (8) includes an air ejector (81) for maintaining the inside of the tower (8) at a negative pressure. The air ejector (81) is configured to store the carbonized gas subjected to the secondary combustion treatment in the secondary combustion tower (8) for at least a certain time (at least 2 seconds in the apparatus of this example) and at a high temperature (at least in the apparatus of this example). (850 ° C.), and provided at a position where air is injected after being retained.

By operating the air ejector (81), the pressure inside the tower (8) becomes negative, so that the tip of the carbonization furnace body (2) also becomes negative, and the carbonized gas generated in the furnace is converted into the secondary combustion tower. The mixture is immediately conveyed to (8), mixed with air from the secondary combustion air blowing nozzle (56) in the material outlet hood (27) on the way, and the mixture is heated by refueling from the auxiliary burner (64). The remaining combustible material is burned,
After maintaining the temperature-lowering state for at least 2 seconds in the secondary combustion tower (8) and completely decomposing the dioxins, the mixture is quenched by mixing with air ejected from the air ejector (81), and the tower (8) is cooled. It is sent to the upper part, where it is further cooled by rapid cooling means.

As described above, in the apparatus of the present invention, the adjustment of the amount of air jetted from the air ejector (81) has an important meaning. In the present invention, the top of the secondary combustion tower (8) is located near the top. Of course, it is also possible to provide exhaust air suction means for the secondary combustion tower. In the present invention, the material outlet hood (27) and / or the secondary combustion tower (8) are further provided with a secondary combustion tower (not shown). Alternatively, auxiliary air blowing means for cooling air can be provided.

The quenching in the apparatus of this example is performed by a water cooling pipe (84) for heat exchange. However, the quenching may be performed by expanding the gas, that is, by causing the gas to work at the time of negative pressure. It may be assisted by the internal energy release of gas accompanying the collision with the inner wall of the secondary combustion tower (8), or may be assisted by air cooling means for air-cooling the radiating fins extended to the gas passage forming member. Therefore, the arrangement positions of the air ejector (81) and the suction pump,
It is preferable to take into consideration forced air cooling from the outside of the secondary combustion tower (8) itself.

Further, in the present invention, an air-cooled heat exchange unit (heat exchange fin) (not shown) is provided by spraying water or introducing low-temperature steam to an appropriate position in the secondary combustion tower (8). , Can be complemented by applying sufficient air. Also, as shown in FIG.
In this example, apart from the piping from the blower (50) for the air ejector (81) to the secondary combustion tower (8), the material outlet hood (27) has a narrow outlet (58) at the outlet hood. , A secondary combustion air supply pipe (52) is provided. For both pipes, compressed air having a pressure of, for example, about 6 kg gauge can be used, and therefore, the secondary combustion air blowing nozzle (56) and The blower pipe (52) for the ejector can be supplied by a branch pipe from a compressed air tank. In the figure, reference numeral (82) indicates a tower (8) before cooling.
Reference numeral (83) indicates a thermometer for monitoring the internal temperature of the tower (8) after cooling, and reference numeral (83) indicates a thermometer for monitoring the internal temperature of the tower (8) after cooling.

As described above, in the carbonization apparatus of the present invention, for example, the furnace temperature in a plurality of regions inside the carbonization furnace main body (2) during operation is 100 ° C. to 240 ° C. in the first zone at the inlet.
C., operating at 400 ° C. to 750 ° C. in the middle zone and 700 ° C. to 950 ° C. in the exit zone to minimize generation of toxic substances.
Preferably, the outlet of the secondary combustion tower (8) can be cooled to, for example, 200 ° C. or less by appropriately combining a plurality of cooling means.

In the carbonizing apparatus of the present invention, the air blowing pipe (22) has four, as shown in the above example, depending on the scale of the material inlet hood (26) or the carbonizing furnace main body (2). The material is connected to the material inlet hood (26) in the same manner as the material outlet hood (2).
7) It is stably suspended and fixed to a steam and / or hot water return pipe (28) used for cooling, which is fixed so as not to hang down in a high-temperature atmosphere after being passed through 7), and has excellent durability. Each of the air injection pipes (22) has a thermometer (23) mounted at the end thereof, and is located in an appropriate space of each zone inside the carbonization furnace main body (2) so as not to hang down in a high-temperature atmosphere. Is fixed so as to be inserted from the inlet direction of the carbonization furnace main body (2) to the back, the temperature can be directly measured in any zone in the axial direction of the carbonization furnace main body (2). Based on the numerical values, it is easy to control the temperature of the dry distillation by arbitrarily controlling the amount of air, and the heat steam generated in the water return pipe (28) of the cooling water is used as a heat source of the apparatus or other equipment, for example. It can be used as a steam source for power generation to obtain power for driving the device.

Each air blowing pipe (22) is connected to an inner pipe (2).
21) and outer water cooling water jacket (222)
The inner pipe (221) has a combustion air passage inside, and the outer water jacket (222) covers the thermometer (23) together with the inner pipe (221). Therefore, the air blowing pipe (22) can be protected even in a high temperature atmosphere in which the furnace temperature exceeds 900 ° C. Further, in the above example, the air blowing pipe (22) is
Water-cooled type is adopted. Alternatively, an air-cooled type can be used, but a water-cooled type is preferable because the cooling air pushing fan becomes excessive and noise increases, and stainless steel (for example, SUS) is used so that the cooling water does not corrode the air blowing pipe (22).
304L), and the tube structure may be a circular tube or a square tube. In the case of a circular tube, there is an advantage that suspended particles in the furnace are difficult to deposit, and in the case of a square tube, there is an advantage that the surface area is large and the heat exchange efficiency is excellent.

The air blowing pipe (22) having a thermometer (23) mounted at its tip depends on the size of the carbonization furnace main body (2), but in the above embodiment, for example, the diameter (outer diameter) of the inner pipe (221) When the diameter (outer diameter) of the jacket outer tube (222) is 120 mm, the inner diameter of the air nozzle (223) can be, for example, 15φ, and is 80 mm in the axial direction.
Thirteen of them can be provided in a zigzag manner at intervals of 80 mm in the axial direction at intervals of 80 ° in a downward direction at intervals of 90 ° in the staggered shape.

In another desirable example, FIG.
2. As shown in FIGS. 13 and 14, the inner pipe (221)
When the diameter (outer diameter) of the air nozzle (223) is 40 mm and the diameter (outer diameter) of the outer tube (222) is 75 mm, the inner diameter of the air nozzle (223) is 10 φ,
At the position of the cross section 90 °, six pieces can be provided laterally in the staggered shape in the horizontal direction at intervals of 60 mm in the axial direction, and six pieces can be provided in the staggered shape in the downward direction. ) Is efficiently blown out into the furnace.

The carbonization furnace main body (2) of the present invention comprises a furnace outer cylinder (3).
3) and a furnace inner cylinder (35), wherein the outer cylinder (33) is cylindrical, and the inner cylinder (35) is provided with a material inlet hood (2).
6) It is a double-walled conical tube whose diameter in the direction of the material outlet hood (27) is longer than the diameter in the direction. The cylindrical type is easier to process than the conical type, but it must be placed diagonally, so it is necessary to support it so that it does not deviate in the traveling direction. Vertical rollers (thrust rollers)
Is required separately. The conical type requires much time for processing, but has the advantage that the carbonizing furnace main body (2) can be installed horizontally, so that a force deviating in the traveling direction does not work. In either case, the function as the carbonization furnace remains unchanged. Then, the space between the furnace outer tube (33) and the furnace inner tube (35) of the carbonization furnace main body (2) is water-cooled or made into a heat insulating space, thereby saving refractory materials.
Alternatively, the life of the refractory can be extended.

As a non-limiting example for the present invention, as shown in FIG. 7 and FIG.
The size of the furnace tube (33) of the carbonization furnace body (2) is 1600
The diameter of a part connected to the material inlet hood (26) is 600φ, and the diameter of a part connected to the material outlet hood (27) is 1150φ and the length is 3600 mm. It is a double-structured tube, and the inside of the inner cylinder (35) is covered with a 175 mm thick refractory / heat insulating material lining (37), so it is compact and easily controls the processing temperature and time. It is possible,
The transfer and removal of the material to be processed in the furnace can be performed quickly and smoothly.

In the furnace lining (37) of the inner cylinder (35) of the carbonization furnace body (2), one or more projecting weirs (39) made of a refractory material or a heat insulating material continuous in the axial direction are provided. With the provision of the strip, the carbonization furnace body (2) is constantly carbonized by continuous rotation in a certain direction, so that the upper and lower portions of the carbonization target are constantly stirred, and the refractory material is partially biased in the circumferential direction. There is an advantage that there is no wear and the life is longer than that of the reciprocating rocking method.

[0066]

As is apparent from the above detailed and concrete description, the carbonization apparatus of the present invention is capable of adjusting the temperature and speed in accordance with the dry distillation state of each axial zone (region) in the rotary carbonization furnace. An air blowing pipe having an air nozzle, which is easy to maintain a desired dry-distilled state throughout the entire region in each region, and has a simple structure, is inserted from the inlet direction of the rotary carbonization furnace to the back. By inserting up to, the temperature can be directly measured in any zone in the axial direction of the rotary carbonization furnace, so that the air amount can be arbitrarily controlled, and the dry-water temperature control and speed control are easy. The carbonization gas exhibits an extremely excellent effect that the generation of harmful substances can be reliably avoided by burning under controlled control in the secondary combustion tower.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rotary continuous carbonization apparatus as an example of the present invention.

FIG. 2 is a top view of the rotary continuous carbonizing apparatus of the example of the present invention.

FIG. 3 is a cross-sectional view along AA (FIG. 1) of the example of the rotary carbonization furnace of the present invention.

FIG. 4 is a sectional view taken along line BB (FIG. 1) of the example of the rotary carbonization furnace of the present invention.

FIG. 5 is a cross-sectional view at CC (FIG. 1) of the example of the rotary carbonization furnace of the present invention.

FIG. 6 is a sectional view taken along the line DD (FIG. 1) of the example of the rotary carbonization furnace of the present invention.

FIG. 7 is a longitudinal sectional view showing a preferred size example of the rotary carbonization furnace main body of the present invention.

FIG. 8 is a longitudinal sectional view showing a preferred size example of the rotary carbonization furnace of the present invention.

FIG. 9 is a longitudinal sectional view showing one example of an air blowing pipe of the present invention.

FIG. 10 is an enlarged vertical cross-sectional view of the distal end portion of the air blowing pipe of the above-described one example of the present invention.

FIG. 11 is an enlarged transverse cross-sectional view of a front end portion of the air blowing pipe according to the above-described example of the present invention, taken along line AA (FIG. 10).

FIG. 12 is a longitudinal sectional view showing another example of the air blowing pipe of the present invention.

FIG. 13 is an enlarged vertical sectional view of a distal end portion of the air blowing pipe of another example of the present invention.

FIG. 14 is a cross-sectional view of the air blowing tube AA of another example of the present invention.
It is a front-end | tip part enlarged transverse cross-sectional view in a part (FIG. 13).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Material supply apparatus 2 Rotary carbonization furnace main body 8 Secondary combustion tower 11 Material receiving hopper 12 Material supply means 13 Cylindrical body 14 Screw press-fitting means 22 Air blowing pipe 221 Inner pipe 222 Water cooling water jacket 223 Air nozzle 224 Cooling water introduction Mouth 225 Steam outlet 23 Thermometer 231 Socket 26 Material inlet hood 27 Material outlet hood 28 Water return pipe 281 Water return pipe tip 29 Installation base 30 Support frame 31 Furnace receiving roller pair 33 Carbonization furnace outer cylinder 35 Carbonization furnace inner cylinder 37 Insulating refractory lining 39 Weir 41 Upright wall 43 Driven tooth 45 Rotation drive chain 47 AC servomotor 49 Outlet hood rear end opening 50 Ejector blower 51 Carbonized material take-out 52 Air blow pipe for secondary combustion 53 Water return pipe passage 54 Depression 55 Outlet hood cylinder 56 Secondary combustion Air blowing nozzle 58 Exit hood narrow portion 59 Exit hood tip opening 60 Carbonized material fire extinguishing water spray means 61 Carbonized material take-out cylinder 63 Carbonized material take-out conveyor 64 Auxiliary burner 81 Air ejector 82 Thermometer 83 Thermometer 84 Heat exchange Water cooling pipe

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F23G 5/20 ZAB F23G 5/20 ZABA 5/44 ZAB 5/44 ZABG (72) Inventor Nobuaki Oshima Tokyo 1-19-1, Uenoge, Setagaya-ku, Japan (72) Inventor Katsumi Ikeda Katsumi Ikeda 1-1-19, Uenoge, Setagaya-ku, Tokyo, Japan Inside (72) Inventor Takeuchi Takeshi 1-19-1 Uenoge, Setagaya-ku, Tokyo F-term in the Environmental Technology Development Institute, Inc. (reference) AA08 BA02 BA21 CA04 CA09 CA12 4D004 AA46 CA26 CA32 CB09 CB31 CB42 CC03 DA01 DA03 DA06 4H012 HA06 HB07 HB09

Claims (23)

[Claims] 1. A carbonization furnace comprising: a material supply device; a rotary carbonization furnace main body disposed in a lateral direction; and a tower-type secondary combustion chamber disposed at a rear end of the carbonization furnace main body. A plurality of air blowing pipes are disposed inside the furnace of the main body, and the plurality of air blowing pipes can blow a regulated amount of air into a space separated from the furnace bottom in each of the plurality of regions inside the furnace. A rotary carbonization device having an air blowing hole. 2. The plurality of air blowing pipes are double pipes each having a water jacket for water cooling on an outer periphery thereof,
The rotary carbonization device according to claim 1, further comprising a plurality of air nozzles penetrating the water jacket from an inner pipe. 3. The carbonization furnace body has a rear end rotatably supported by a material inlet hood capable of maintaining the airtightness of the rotating portion, and a front end rotatably supported by a material outlet hood capable of maintaining the airtightness of the rotating portion, The material inlet hood fixedly holds a rear end of the plurality of air blowing pipes and a rear end of a water return pipe for heated cooling water from the water jacket. The other end of the water return pipe is suspended and held at the forward end of the water return pipe, so that the plurality of air blowing pipes are located in the space inside the furnace. Type carbonization equipment. 4. A method according to claim 1, wherein each of said plurality of air injection pipes has a different length, and has a thermometer at a tip portion for monitoring a temperature of said plurality of regions inside the furnace. Item 4. A rotary carbonizing device according to any one of Items 3. 5. The material supply device comprises a material supply means having a material receiving hopper at a top, and a tip of the supply means comprises a press-fitting means comprising a screw rotating in a cylindrical body connected to the material inlet hood. The rotary carbonization apparatus according to any one of claims 1 to 4, wherein the supply material is conveyed while being compressed, and the airtightness of the gap in the cylindrical body is maintained. 6. The material inlet hood allows a tip of a press-fitting means consisting of a screw rotating in a tubular body provided at a rear end of the material supply device to pass through and fix the tip of the press-fitting means.
The rotary carbonization according to any one of claims 1 to 5, wherein an end of the cooling water return pipe and a rear end of the plurality of air blowing pipes are vertically fixed in parallel and fixedly held. apparatus. 7. The rotation according to claim 1, wherein the carbonization furnace main body has a cylindrical shape or a conical shape having a tapered structure in the direction of the material supply device. Type carbonization equipment. 8. The carbonization furnace main body has a conical shape having a tapered structure in the direction of the material supply device, and the plurality of air blowing pipes are inserted substantially horizontally at a substantially intermediate portion in the carbonization furnace main body. The rotation according to claim 7, wherein, by being held, a distance between each of the air blowing holes of the plurality of air blowing pipes and an inner wall of the carbonizing furnace increases toward a material outlet direction. Type carbonization equipment. 9. The carbonization furnace main body is a double-structured pipe composed of an outer cylinder and an inner cylinder, the outer cylinder is a metal cylinder, and the inner cylinder has a lining made of a heat-insulating refractory material on an inner wall. It is a metal conical shape applied, and on the inner wall of the furnace, for transferring the material to be processed in the axial direction while continuously supplying the material to be processed from the furnace bottom to the furnace space by rotating the carbonization furnace main body. One of the protrusion weir
The rotary carbonization device according to claim 7, wherein one or more strips are provided. 10. The rotary carbonization apparatus according to claim 9, wherein the weir is lowered toward the material outlet hood or is not provided on the material outlet hood. 11. The furnace temperature in a plurality of regions inside the furnace main body at the time of operation of the carbonization apparatus is 100 ° C. in the first zone at the inlet.
The rotary carbonization device according to any one of claims 1 to 10, wherein the temperature is 400 to 750 ° C in an intermediate zone and 700 to 950 ° C in an outlet zone. 12. The carbonization furnace main body is rotatably driven by rotation of a chain or gear capable of meshing with driven teeth provided on the outside of the main body cylinder and capable of adjusting the rotation speed. The rotary carbonizing device according to any one of claims 1 to 11. 13. The rotary carbonization apparatus according to claim 12, wherein the carbonization furnace main body is further supported outside the main body cylinder by a carbonization furnace receiving roller for smooth rotation of the main body cylinder. . 14. A rear end opening of the outlet hood, in which the material outlet hood keeps airtight and rotatably supports the front end of the carbonization furnace main body, and a carbonized material which does not impair airtightness in the furnace. An outlet hood cylindrical portion having a water return pipe through-hole that holds the outlet end of the water return pipe through and through, and an outlet hood narrow portion in which a secondary combustion air blowing nozzle is arranged, The rotary carbonization device according to any one of claims 1 to 13, further comprising an outlet hood tip opening portion fastened to the front end of the secondary combustion chamber. 15. A screw conveyor having a water spraying means for extinguishing fired carbonized material, wherein an outlet of the extracting means which does not impair the secrecy of the carbonized material in the furnace is provided. The rotary carbonizing device according to item 1. 16. A secondary combustion burner is disposed at an opening of a tip end of an outlet hood connected to a narrow portion of an outlet hood where an air blowing nozzle for secondary combustion of the material outlet hood is disposed. The rotary carbonizing device according to item 1. 17. The secondary combustion tower is provided with an air ejector for keeping the carbonized gas subjected to the secondary combustion treatment in the carbonization furnace and the secondary combustion tower at a negative pressure. The rotary carbonization device according to any one of claims 1 to 16, wherein 18. The air ejector may be configured to cause the carbonized gas subjected to the secondary combustion treatment in the secondary combustion tower for at least a certain time.
18. The rotary carbonization apparatus according to claim 17, wherein the apparatus is provided at a position where the air is injected after being kept at a high temperature. 19. The rotary carbonization apparatus according to claim 17, wherein the secondary combustion tower has, after the air ejector, a means for rapidly cooling the carbonized gas after secondary combustion. 20. The rotary carbonization apparatus according to claim 19, wherein the means for rapidly cooling the carbonized gas after secondary combustion in the secondary combustion tower includes a water-cooled pipe for heat exchange. 21. The rotary carbonizer according to claim 19, wherein the means for rapidly cooling the carbonized gas after secondary combustion in the secondary combustion tower includes a rapid adiabatic expansion means. 22. The quenching means for the post-combustion dry distillation gas in the secondary combustion tower includes an air cooling means for air-cooling a radiating fin extending from a gas passage forming member. The rotary carbonizing device according to item 1. 23. The rotary carbonization apparatus according to claim 19, wherein the means for rapidly cooling the carbonized gas after secondary combustion in the secondary combustion tower includes means for injecting water or steam into the gas.