JP2004010773A - Internal combustion type multi-stage carbonization furnace - Google Patents

Abstract

The present invention provides an internal combustion type multi-stage carbonization furnace that is advantageous for effectively removing tar components adhering to a dry distillation chamber.
An internal combustion type multistage carbonization furnace includes a carbonization chamber group including a carbonization chamber group that is provided with a raw material and is provided in multiple stages in the vertical direction and performs a carbonization heating process in which the supply of oxygen is restricted. An enclosing wall 4 forming a combustion chamber 3 surrounding from outside, and a combustible carbonized gas generated from the raw material carbonized in the carbonization chamber 2 is guided to the combustion chamber 3 and the combustion chamber 3 is heated by the combustion of the introduced carbonized gas. And a carbonization gas combustion means 5 for heating the carbonization chamber 2 by heating the combustion chamber 3. An oxygen-containing gas supply pipe 6 for supplying oxygen-containing gas to at least one of the dry-distillation chambers 2 forming a dry-distillation chamber group to burn off tar adhering to the dry-distillation chamber 2 and cleaning the dry-distillation chamber 2 An air supply source 7 for supplying an oxygen-containing gas to the oxygen-containing gas supply pipe 6 at times.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an internal combustion type multi-stage carbonization furnace for carbonizing raw materials represented by organic wastes such as plant seeds and animal dung.
[0002]
[Prior art]
The prior art will be described using an organic waste as an example. Conventionally, organic wastes such as plant seeds, paper waste, food residue, fiber waste, plastic waste, and the like, discharged in association with the activities of the business entity have been incinerated in an incinerator. However, in recent years, the use of incinerators has been restricted by the Ordinance of the Ministry of Health and Welfare, so that the above-mentioned organic waste must be disposed of by a specialized external disposal company.
[0003]
Outsourcing to a specialized external processor is costly. Especially when a relatively small amount of organic waste is treated, the cost is high because of the small amount. In addition, when a certain amount is reached, when outsourcing to an external processing company, a storage place is required and adverse effects on the surrounding environment must be considered, which may make storage itself difficult.
[0004]
[Problems to be solved by the invention]
Thus, in recent years, the present inventors have steamed organic waste in a carbonization chamber in which the supply of oxygen is limited and carbonized to convert the organic waste into carbide and carbonized gas, and the combustible components of the carbonized gas. Based on this idea, we developed an internal combustion type multi-stage carbonization furnace based on the idea of heating and heating the organic waste in the carbonization chamber using the heat of combustion. This internal combustion type multi-stage carbonization furnace is provided with a carbonization chamber group including a carbonization chamber that is provided with an organic material and is provided in multiple stages in a vertical direction and performs a carbonization heating process in which the supply of oxygen is restricted, and a carbonization chamber group from the outside. The surrounding wall forming the surrounding combustion chamber, and the carbonization gas generated from the raw material carbonized in the carbonization chamber constituting the carbonization chamber group is guided to the combustion chamber, and the combustion chamber is heated by the combustion of the guided carbonization gas, and the combustion chamber is heated. And carbonization gas combustion means for heating the carbonization chamber by heating.
[0005]
However, in the internal combustion type multi-stage carbonization furnace, tar generated by the carbonization heat treatment may adhere to the carbonization chamber. As described above, the raw material may adhere to the tar component adhered to the inner wall surface and grow large. In this case, a clogging phenomenon may occur in a dry distillation chamber or the like. For this reason, in the above-mentioned internal combustion type multi-stage carbonization furnace, it was necessary to periodically stop the operation and manually clean tar components in the distillation chamber or the like.
[0006]
The present invention has been made in view of the above circumstances, and has as its object to provide an internal combustion type multistage carbonizing furnace that is advantageous for effectively removing tar adhering to a dry distillation chamber.
[0007]
[Means for Solving the Problems]
An internal combustion type multi-stage carbonization furnace according to the present invention is provided with a carbonization chamber group including a carbonization chamber in which a raw material is supplied and a carbonization heating process in which a supply of oxygen is restricted and provided in multiple stages in a vertical direction, and a carbonization chamber group is provided outside. A surrounding wall forming a combustion chamber surrounding the chamber and a combustible carbonized gas generated from the raw material carbonized in the carbonization chambers constituting the carbonization chamber group are guided to the combustion chamber, and the combustion chamber is heated by the combustion of the introduced carbonized gas. And an internal combustion type multi-stage carbonization furnace comprising a carbonization gas burning means for heating the carbonization chamber by heating the combustion chamber,
An oxygen-containing gas supply pipe for supplying an oxygen-containing gas to at least one of the carbonization chambers forming the carbonization chamber group to burn and remove tar adhering to the carbonization chamber; and an oxygen-containing gas when cleaning the carbonization chamber. A supply source for supplying an oxygen-containing gas to the supply pipe.
[0008]
According to the present invention, at the time of cleaning the carbonization chamber, the oxygen-containing gas is supplied to at least one of the carbonization chambers forming the carbonization chamber group via the oxygen-containing gas supply pipe. This burns and removes the tar component adhering to the carbonization chamber,
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
(1st Embodiment)
Hereinafter, a first embodiment according to the present invention will be described with reference to FIG. FIG. 1 schematically shows the structure of an internal combustion type multi-stage carbonization furnace 1. The internal combustion type multi-stage carbonization furnace 1 includes a plurality of (six in the embodiment) carbonization chamber groups formed of a plurality (six in the embodiment) of carbonization chambers provided in a vertically fixed manner in multiple stages (six in the embodiment). An enclosing wall 4 forming a combustion chamber 3 having a ring shape in cross section surrounding the carbonization chamber 2 from the outside coaxially, a gas pipe 5 functioning as carbonization gas combustion means, and a gas in the combustion chamber 3 outside the combustion chamber 3. And an exhaust port 8 for exhausting air.
[0010]
In consideration of heat transfer from the combustion chamber 3 to the carbonization chamber 2, the carbonization chamber 2 is formed of a wall 2p made of a metal (for example, alloy steel such as stainless steel) having heat resistance and high-temperature corrosion resistance. A raw material supply port 90 for supplying a raw material is provided in the uppermost dry distillation chamber 2 in the upper and lower multi-stage directions. The lowermost dry distillation chamber 2 in the upper and lower multistage directions (Y direction) is provided with a carbide discharge port 91 through which the carbide after the raw material is carbonized is discharged. The carbide discharged from the carbide discharge port 91 is discharged by the transfer device 94. Further, a drop port 92 is provided for communicating the dry distillation chambers 2 vertically adjacent to each other. The gas pipe 5 is arranged in the combustion chamber 3 so as to communicate each of the carbonization chambers 2 with the combustion chamber 3. The carbonization chamber 2 has basically a closed structure except for the raw material supply port 90, the carbide discharge port 91, and the gas pipe 5, and supply of air to the carbonization chamber 2 is restricted. It is suitable for steaming.
[0011]
The internal combustion type multi-stage carbonization furnace 1 is provided with stirring means 10 for stirring the raw materials. The stirring means 10 includes a rotatable drive shaft 11 arranged along the longitudinal direction in a central region of each of the dry distillation chambers 2, and a stirring section 12 connected to the drive shaft 11 and stirring the raw materials in each of the dry distillation chambers 2. Have. The drive shaft 11 is rotated by a drive source 11c (a motor mechanism or the like) (not shown).
[0012]
The raw material A composed of organic waste is supplied from the upper raw material supply port 90 of the internal combustion type multistage carbonizing furnace 1 to the uppermost dry distillation chamber 2 by the charging device 96. Here, since the stirring unit 12 rotates in the carbonization chamber 2, the raw material in each of the carbonization chambers 2 is agitated by the stirring unit 12, and the raw material gradually drops into the lower carbonization chamber 2 through the falling port 92 during the stirring. In this way, the raw materials are sequentially conveyed downward. A burner 17 as a heating unit is provided near the bottom of the combustion chamber 3. The burner 17 mainly serves to preheat the internal combustion type multi-stage carbonization furnace 1 at the time of startup of the internal combustion type multi-stage carbonization furnace 1, secure the temperature of the carbonization chamber 2 when the amount of generated carbonization gas is extremely small, and maintain the gas pipe 5. Is used to ignite flammable dry distillation gas blown out from the crater 55.
[0013]
As shown in FIG. 1, a plurality of gas pipes 5 according to the present embodiment are provided, and are formed of a metal having heat resistance and high-temperature corrosion resistance (for example, stainless steel). A crater 55 is provided at the lower end, which is the tip of the gas pipe 5. The crater 55 is a nozzle for burning the carbonized gas generated in the carbonization chamber 2 in the combustion chamber 3. In the present embodiment, the crater 55 of the gas pipe 5 has a variable structure in which the crater diameter is variable.
[0014]
An oxygen-containing gas supply pipe 6 and a blower 7 as a blowing source are provided. The oxygen-containing gas supply pipe 6 burns and removes tar adhering to the inner wall surface of the dry distillation chamber 2 by supplying air as an oxygen-containing gas to each of the dry distillation chambers 2 forming the dry distillation chamber group. It is. The oxygen-containing gas supply pipe 6 includes a plurality of branch pipes 60 connected to each of the dry distillation chambers 2 and a common pipe 62 common to the plurality of branch pipes 60. The branch pipe 60 of the oxygen-containing gas supply pipe 6 is replaceable so that its flow path diameter can be changed. The blower 7 supplies air to each of the carbonization chambers 2 through the branch pipe 60 by supplying air to the common pipe 62 of the oxygen-containing gas supply pipe 6.
[0015]
The common pipe 62 of the oxygen-containing gas supply pipe 6 is provided with a backflow prevention valve 65 as a backflow prevention unit for preventing the carbonized gas generated in the carbonization chamber 2 from flowing back to the blower 7 side. As shown in FIG. 2, the check valve 65 includes a valve body 65c pivotally supported by a hinge support portion 65a so as to be vertically swingable. The valve body 65c is closed by gravity. The valve body 65c can be urged by a spring in the valve closing direction. When air, which is an oxygen-containing gas, flows in the direction of arrow K1 from the blower 7, the valve body 65c moves in the direction of arrow C1, which is the valve opening direction, and opens. When the gas from the carbonization chamber 2 flows in the direction of arrow K2 toward the blower 7, the valve body 65c does not open but remains closed. Therefore, the flow check valve 65 allows the flow of air from the blower 7 to the carbonization chamber 2, but suppresses the flow of the carbonization gas from the carbonization chamber 2 to the blower 7. The backflow prevention valve 65 suppresses the backflow of the flammable carbonized gas generated in the carbonization chamber 2 to the blower 7 side, so that the gasification of the carbonized gas is prevented from leaking to the outside air, which is advantageous in terms of environmental protection. In addition, the protection against the blower 7 is ensured.
[0016]
When performing the carbonization heat treatment in the internal combustion type multi-stage carbonization furnace 1, the inside of the combustion chamber 3 of the internal combustion type multi-stage carbonization furnace 1 is preheated by the burner 17. Then, the raw material A is supplied from the raw material supply port 90 to the uppermost dry distillation chamber 2 by the charging device 96. The raw material A is preferably organic waste such as plant seeds (plum seeds), livestock dung such as chicken dung, cow dung, and pig dung, plastic waste, food residue, fiber waste, and paper waste. Since the stirring unit 12 rotates in the carbonization chamber 2, the raw material in each carbonization chamber 2 is stirred by the stirring unit 12, falls into the lower carbonization chamber 2 via the drop port 92, and is sequentially conveyed downward. As described above, the carbonization chamber 2 basically has a closed structure, and since the supply of air is restricted, the combustion of the raw material A in the carbonization chamber 2 is suppressed, and the carbonization state is established. Accordingly, the raw material A being conveyed in the carbonization chamber 2 is gradually carbonized, and combustible carbonized gas is generated from the raw material in the carbonization chamber 2 by thermal decomposition. Since a negative pressure generator (not shown) for generating negative pressure, which communicates with the exhaust port 8, operates, a suction action is generated at the exhaust port 8. For this reason, the carbonization gas generated in the carbonization chamber 2 is guided to the combustion chamber 3 from the crater 55 at the tip of the gas pipe 5 via the gas pipe 5. The carbonization gas blown out from the crater 55 generates a combustion flame WA at the crater 55 by the heat of the combustion chamber 3. The combustible dry distillation gas thus guided to the combustion chamber 3 is burned by the heat of the combustion chamber 3. The heat of combustion of the carbonization gas serves as a heat source for steaming the raw material in the carbonization chamber 2.
[0017]
Thus, the combustion chamber 3 is heated by the combustion of the combustible dry distillation gas. Therefore, the burner 17, that is, the fuel other than the carbonization gas is hardly needed except at the time of starting the internal combustion type multi-stage carbonization furnace 1. The raw material A that has undergone the dry distillation heat treatment as described above becomes carbide, and is taken out by the transfer device 94 through the carbide discharge port 91 during or after operation. In the present embodiment, although the temperature of the combustion chamber 3 varies depending on the type of the raw material A, it is generally about 600 to 800 ° C, and the temperature of the carbonization chamber 2 is about 400 to 600 ° C. However, the temperature of the combustion chamber 3 and the temperature of the carbonization chamber 2 are not limited to these.
[0018]
As described above, as the carbonization heat treatment proceeds, tar components gradually adhere to the carbonization chamber 2. When the carbonization chamber 2 is to be cleaned, the carbonization heat treatment is temporarily interrupted to make the raw material A in the carbonization chamber 2 once empty or substantially empty. Even in this state, the temperature of the carbonization chamber 2 is high. When the blower 7 is driven, the air is supplied to each of the dry distillation chambers 2 through the common pipe 62 and the branch pipe 60 of the oxygen-containing gas supply pipe 6. As a result, the tar component adhering to the dry distillation chamber 2 reacts with oxygen, and the tar component is burned and removed. Although a plurality of carbonization chambers 7 are provided, only one blower 7 is required. Therefore, the blower 7 can function as a common air supply source for the plurality of carbonization chambers 7.
[0019]
When the cleaning process of the dry distillation chamber 2 is completed as described above, the dry distillation heating process of the raw material A is restarted. That is, the raw material is supplied from the raw material supply port 90 to the uppermost dry distillation chamber 2 by the charging device 96, and the stirring unit 12 is rotated to agitate the raw material in the dry distillation chamber 2, thereby roasting the raw material in the dry distillation chamber 2. As described above, flammable dry distillation gas is generated from the raw material A in the dry distillation chamber 2, is drawn out from the crater 55 at the tip of the gas pipe 5 through the gas pipe 5, and burns.
[0020]
As shown in FIG. 1, a branch pipe 60 of the oxygen-containing gas supply pipe 6 is disposed in the combustion chamber 3. Therefore, the air supplied to the carbonization chamber 2 via the branch pipe 60 is supplied to the carbonization chamber 2 after being preheated in the combustion chamber 3. Therefore, a decrease in the temperature of the carbonization chamber 2 during cleaning of the carbonization chamber 2 is suppressed, and the burning and removal of tar content in the carbonization chamber 2 can be performed effectively.
[0021]
Tar may also adhere to the inner wall surface of the gas pipe 5. In this respect, according to the present embodiment, the gas pipe 5 communicates with the branch pipe 60 of the oxygen-containing gas supply pipe 6, so that the air supplied from the branch pipe 60 of the oxygen-containing gas supply pipe 6 to the carbonization chamber 2 is Since the gas reaches the gas pipe 5 via the carbonization chamber 2, the tar adhering to the inner wall surface of the gas pipe 5 is burned and removed by air, and the inner wall surface of the gas pipe 5 can also be cleaned.
[0022]
According to the present embodiment, as shown in FIG. 1, each of the branch pipes 60 of the oxygen-containing gas supply pipe 6 is provided with an on-off valve 9 for variably adjusting the flow rate of air per unit time. . The flow path area of each of the on-off valves 9 is variably adjusted in accordance with the adhesion state of the tar content in each of the carbonization chambers 2. That is, in the on-off valve 9 connected to the dry distillation chamber 2 having a large amount of tar, the opening amount of the on-off valve 9 is relatively increased, and the flow rate of air passing through the on-off valve 9 per unit time is relatively reduced. To increase the burnability of tar components. In the on-off valve 9 connected to the dry distillation chamber 2 having a small amount of tar, the amount of opening of the on-off valve 9 is relatively reduced, and the flow rate of air per unit time is relatively reduced or set to zero. .
[0023]
In addition, according to the present embodiment, the backflow prevention valve 65 suppresses the combustible gas from the carbonization chamber 2 from flowing back to the blower 7 as described above. This is advantageous in terms of environmental protection, and furthermore, protection against the blower 7 is ensured. Even if the raw material A is animal droppings such as chicken droppings, it is possible to prevent the smell from leaking into the outside air. When the raw material A is animal dung or the like such as chicken dung or the like, the carbonized material that is the residue after the carbonization and heat treatment of the raw material A is mainly composed of carbon, calcium, potassium, phosphorus, nitrogen, etc. It can be used as an improving material. In addition, since the carbonized material, which is the residue after the raw material A is subjected to the dry distillation heat treatment, is black, it has a high absorptivity to solar energy and can function as a snow melting agent.
[0024]
(2nd Embodiment)
The second embodiment shown in FIG. 3 has basically the same configuration as the first embodiment, and has the same operation and effect. Hereinafter, the different parts will be mainly described. In each of the carbonization chambers 2, a temperature detecting means 100 such as a thermocouple for indirectly or directly detecting the temperature of the carbonization chamber 2 is provided in the carbonization chamber 2 itself or in the vicinity thereof. The detection signal of each temperature detecting means 100 is input to the control device 101. Therefore, when the temperature of one of the carbonization chambers 2 becomes excessively high during the cleaning for cleaning the tar content adhering to the carbonization chamber 2, the temperature detecting means 100 for detecting the temperature of the carbonization chamber 2 is used. Is detected. The detection signal of each temperature detecting means 100 is input to the control device 101, and the control device 101 controls the opening amount of each on-off valve 9, and relatively controls the amount of air blown per unit time passing through each on-off valve 9. Decrease, increase, or set to 0.
[0025]
That is, in a group of carbonization chambers, when the temperature of a certain carbonization chamber 2 becomes excessively high, the temperature detecting means 100 for detecting the temperature of the carbonization chamber 2 detects this and sends air to the carbonization chamber 2. The control device 101 relatively reduces the opening amount of the on-off valve 9 and relatively reduces or sets the amount of air blown per unit time passing through the on-off valve 9 to zero.
[0026]
Further, when the temperature of a certain carbonization chamber 2 in the carbonization chamber group is excessively lowered, the temperature detecting means 100 for detecting the temperature of the carbonization chamber 2 detects this, and an opening / closing valve for supplying air to the carbonization chamber 2. The control device 101 relatively increases the opening amount of the valve 9 and relatively increases the amount of air blown per unit time passing through the on-off valve 9. As a result, the temperature of the dry distillation chamber 2 is maintained in an appropriate temperature range. Also in this embodiment, the common pipe 62 of the oxygen-containing gas supply pipe 6 is provided with a backflow prevention valve 65 for preventing the carbonized gas generated in the carbonization chamber 2 from flowing back to the blower 7 side.
[0027]
(Third embodiment)
The third embodiment shown in FIG. 4 has basically the same configuration as the first embodiment, and has the same operation and effect. Hereinafter, the different parts will be mainly described. In the present embodiment, in general, the tar component tends to easily adhere to the carbonization chamber 2 located in an intermediate region in the vertical multi-step direction (the direction of the arrow Y). Therefore, in the present embodiment, the flow path diameter of the branch pipe 60 of the oxygen-containing gas supply pipe 6 for supplying the oxygen-containing gas (air) to the dry distillation chamber 2 located in the middle area in the upper and lower multistage directions (the direction of the arrow Y) is different from that of the first embodiment. The diameter of the flow path of the branch pipe 60 of the oxygen-containing gas supply pipe 6 that supplies the oxygen-containing gas (air) to the carbonization chamber 2 (the uppermost and lowermost carbonization chambers 2) is relatively large. In other words, the oxygen-containing gas supply pipe 6 that supplies the oxygen-containing gas (air) to the dry-distillation chamber 2 in which the tar content is relatively large in the dry-distillation chamber group supplies the oxygen-containing gas (air) to the other dry-distillation chambers 2. The flow path diameter is relatively larger than that of the oxygen-containing gas supply pipe 6 to be supplied. Also in this embodiment, the common pipe 62 of the oxygen-containing gas supply pipe 6 is provided with a backflow prevention valve 65 for preventing the carbonized gas generated in the carbonization chamber 2 from flowing back to the blower 7 side.
[0028]
(Fourth embodiment)
The fourth embodiment shown in FIG. 5 has basically the same configuration as the first embodiment, and has the same operation and effect. Hereinafter, the different parts will be mainly described. The raw material used in the present embodiment has a relatively low moisture content, and has a property that a dry distillation gas is relatively easily generated. Therefore, the tar component is generally more likely to adhere to the upper carbonization chamber 2 than the relatively lower carbonization chamber 2 in the upper and lower multi-stage direction (the direction of the arrow Y). Therefore, according to this embodiment, the branch pipe 60 of the oxygen-containing gas supply pipe 6 is not provided in the relatively lower dry distillation chamber 2 but is provided in the relatively upper dry distillation chamber 2. Also in this embodiment, the common pipe 62 of the oxygen-containing gas supply pipe 6 is provided with a backflow prevention valve 65 for preventing the carbonized gas generated in the carbonization chamber 2 from flowing back to the blower 7 side.
[0029]
(Fifth embodiment)
The fifth embodiment shown in FIG. 6 has basically the same configuration as the first embodiment, and has the same operation and effect. Hereinafter, the different parts will be mainly described. The raw material used in the present embodiment has a relatively large amount of moisture and has a property of hardly generating a dry distillation gas. Therefore, the tar component is more likely to adhere to the lower distillation chamber 2 than the upper distillation chamber 2. Therefore, in the present embodiment, the flow path diameter of the branch pipe 60 of the oxygen-containing gas supply pipe 6 that supplies the oxygen-containing gas (air) to the dry distillation chamber 2 located relatively below in the upper and lower multi-stage directions (the direction of the arrow Y) is The diameter of the branch pipe 60 of the oxygen-containing gas supply pipe 6 for supplying the oxygen-containing gas (air) to the relatively upper dry distillation chamber 2 is relatively large. Also in this embodiment, the common pipe 62 of the oxygen-containing gas supply pipe 6 is provided with a backflow prevention valve 65 for preventing the carbonized gas generated in the carbonization chamber 2 from flowing back to the blower 7 side.
[0030]
(Sixth embodiment)
The sixth embodiment shown in FIGS. 7 and 8 has basically the same configuration as the first embodiment, and has the same operation and effect. The drive shaft 11, which is a component of the stirring means 10 for stirring the raw material in the dry distillation chamber 2, has a hollow shape having a hollow chamber 11x. The hollow chamber 11x communicates with the blower 7 via the shaft support 705 and the communication passage 700. The shaft supporting portion 705 supports the fixed communication path 700 and the rotating drive shaft 11 while connecting them to each other. The hollow chamber 11x of the drive shaft 11 communicates with each of the dry distillation chambers 2 through the opening 11k. Therefore, by driving the blower 7, the air blown out by the blower 7 reaches the hollow chamber 11x of the drive shaft 11 through the communication path 700 and the shaft support 705, and is further supplied to the carbonization chamber 2 through the opening 11k. . Therefore, the drive shaft 11 also serves as an oxygen-containing gas supply pipe for supplying air, which is an oxygen-containing gas, to the carbonization chamber 2 together with the communication path 700. When the drive shaft 11 is rotated, the opening 11k of the drive shaft 11 is also rotated, so that air (oxygen-containing gas) can be dispersed and fed into the carbonization chamber 2, and the tar content in the carbonization chamber 2 is removed. This is advantageous for reducing unevenness. Also in the present embodiment, a backflow prevention valve 65 for suppressing the backflow of the carbonized gas generated in the carbonization chamber 2 to the blower 7 side is provided.
[0031]
(Other)
In the above-described embodiment, the number of stages of the carbonization chamber 2 is six, but is not limited thereto, and may be two to ten, and in some cases, more. In the above-described embodiment, air is supplied to the carbonization chamber 2 as oxygen-containing gas. However, the present invention is not limited to this, and oxygen-enriched gas or oxygen gas having a higher oxygen concentration than air is supplied to the carbonization chamber 2. You may decide to pay. In addition, the present invention is not limited to only the above-described embodiment, and can be implemented with appropriate modifications without departing from the gist. Even a part of the terms described in the embodiments can be described in the claims.
[0032]
The following technical idea can be understood from the above description.
(Supplementary Note 1) A dry distillation room group consisting of a dry distillation room which is provided with animal dung such as chicken dung and is provided in multiple stages in the vertical direction and which performs a dry distillation heating process in which the supply of oxygen is restricted, and surrounds the dry distillation room group from the outside. A combustible gas generated from animal dung such as chicken manure that has been carbonized in the carbonization chambers constituting the carbonization chamber group is guided to the combustion chamber, and the combustion of the carbonized gas led to the combustion chamber. Heating the combustion chamber and heating the carbonization chamber by heating the combustion chamber, and comprising: a carbonization gas burning means for heating the carbonization chamber; and supplying an oxygen-containing gas to at least one of the carbonization chambers forming the carbonization chamber group. Characterized by comprising an oxygen-containing gas supply pipe for burning and removing the tar component adhering to the dry distillation chamber, and a blowing source for supplying the oxygen-containing gas to the oxygen-containing gas supply pipe during cleaning. Internal combustion type multistage for animal feces treatment Furnace.
[0033]
【The invention's effect】
According to the present invention, it is possible to provide an internal combustion type multi-stage carbonization furnace that is advantageous for effectively removing the tar component attached to the carbonization chamber.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view schematically showing an internal structure of an internal combustion type multi-stage carbonization furnace according to a first embodiment.
FIG. 2 is a cross-sectional view schematically showing the structure of a check ring according to the first embodiment.
FIG. 3 is a cross-sectional view schematically showing an internal structure of an internal combustion type multi-stage carbonization furnace according to a second embodiment.
FIG. 4 is a sectional view schematically showing the internal structure of an internal combustion type multi-stage carbonization furnace according to a third embodiment.
FIG. 5 is a sectional view schematically showing an internal structure of an internal combustion type multi-stage carbonization furnace according to a fourth embodiment.
FIG. 6 is a cross-sectional view schematically showing an internal structure of an internal combustion type multi-stage carbonization furnace according to a fifth embodiment.
FIG. 7 is a cross-sectional view schematically showing an internal structure of an internal combustion type multi-stage carbonization furnace according to a sixth embodiment.
FIG. 8 is a sectional view of an opening portion of a drive shaft.
[Explanation of symbols]
In the figure, 1 is an internal combustion type multi-stage carbonization furnace, 2 is a carbonization chamber, 3 is a combustion chamber, 4 is an enclosing wall, 5 is a gas pipe, 6 is an oxygen-containing gas supply pipe, 65 is a check valve (check element), 7 Indicates a blower (blowing source).

Claims (12)

A carbonization chamber group comprising a carbonization chamber in which a raw material is supplied and a carbonization heat treatment is performed, which is provided in multiple stages in the vertical direction and the supply of oxygen is limited.
A surrounding wall forming a combustion chamber surrounding the carbonization chamber group from outside,
The combustible carbonized gas generated from the raw material carbonized in the carbonization chambers constituting the carbonization chamber group is guided to the combustion chamber, and the combustion chamber is heated by the combustion of the introduced carbonized gas, and the carbonization chamber is heated by heating the combustion chamber. An internal combustion type multi-stage carbonization furnace comprising carbonization gas combustion means,
An oxygen-containing gas supply pipe that burns and removes a tar component adhering to the dry distillation chamber by supplying an oxygen-containing gas to at least one of the dry distillation chambers forming the dry distillation chamber group,
An internal combustion type multi-stage carbonization furnace, comprising: an air supply source for supplying an oxygen-containing gas to an oxygen-containing gas supply pipe during cleaning. 2. The internal combustion type multi-stage carbonization furnace according to claim 1, wherein the carbonization gas burning means is formed by a gas pipe for guiding a carbonization gas generated from a raw material in the carbonization chamber to the combustion chamber. In Claim 1 or Claim 2, at least a part of the oxygen-containing gas supply pipe is disposed in the combustion chamber, and the oxygen-containing gas supplied to the carbonization chamber through the oxygen-containing gas supply pipe is heated by the combustion chamber. An internal combustion type multi-stage carbonization furnace, which is fed to a carbonization chamber after being preheated in a furnace. In any one of claims 1 to 3, any one of the oxygen-containing gas supply pipe and the blowing source is provided with a backflow prevention unit that suppresses backflow of the carbonized gas generated in the carbonization chamber to the ventilation source side. An internal combustion type multi-stage carbonization furnace characterized by being used. In any one of claims 1 to 4, the oxygen-containing gas supply pipe that supplies the oxygen-containing gas to the relatively middle carbonization chamber in the upper and lower multistage directions supplies the oxygen-containing gas to another carbonization chamber. An internal combustion type multi-stage carbonization furnace characterized in that the flow path diameter is relatively larger than that of the oxygen-containing gas supply pipe. In any one of claims 1 to 4, the oxygen-containing gas supply pipe that supplies an oxygen-containing gas to the upper carbonization chamber relatively in the upper and lower multistage directions,
An internal combustion type multi-stage carbonization furnace characterized in that a flow path diameter is relatively larger than an oxygen-containing gas supply pipe for supplying an oxygen-containing gas to a relatively lower dry distillation chamber in upper and lower multi-stage directions. In any one of claims 1 to 4, the oxygen-containing gas supply pipe that supplies an oxygen-containing gas to the relatively lower dry distillation chamber in the upper and lower multistage directions,
An internal combustion type multi-stage carbonization furnace characterized in that a flow path diameter is relatively larger than an oxygen-containing gas supply pipe for supplying an oxygen-containing gas to a relatively upper dry distillation chamber in a vertical multi-stage direction. In any one of claims 1 to 4, the oxygen-containing gas supply pipe that supplies the oxygen-containing gas to the dry distillation chamber in which the tar content increases in the dry distillation chamber group,
An internal combustion type multi-stage carbonization furnace characterized in that a flow path diameter is relatively larger than an oxygen-containing gas supply pipe for supplying an oxygen-containing gas to another dry distillation chamber. In any one of claims 2 to 8, the gas pipe of the carbonized gas combustion means is in communication with the oxygen-containing gas supply pipe, and the tar component attached to the inner wall surface of the gas pipe of the carbonized gas combustion means is: An internal combustion type multistage carbonization furnace characterized by being burned and removed by an oxygen-containing gas fed from a oxygen-containing gas supply pipe to a carbonization chamber. The internal combustion type multi-stage carbonization furnace according to any one of claims 1 to 9, wherein the oxygen-containing gas supply pipe is replaceable so that the flow path diameter thereof can be changed. In any one of claims 1 to 10, a plurality of oxygen-containing gas supply pipes are provided so as to supply oxygen-containing gas to each of the carbonization chambers forming the carbonization chamber group, respectively.
Each of the oxygen-containing gas supply pipes has an on-off valve for variably adjusting a flow rate of the oxygen-containing gas per unit time. The stirrer according to any one of claims 1 to 11, further comprising a rotatable drive shaft having a hollow chamber communicating with the carbonization chamber, and a stirrer connected to the drive shaft and agitating the raw material in the carbonization chamber with rotation of the drive shaft. Stirring means having
An internal combustion type multi-stage carbonization furnace, wherein the drive shaft also serves as at least a part of the oxygen-containing gas supply pipe.

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