JP2005114336A - Carbonization facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem, where it is difficult to recover high-boiling-point constituent oil since the product oil of the high-boiling-point constituent in produced gas by carbonizing a carbonizing object is condensed in water. <P>SOLUTION: A carbonization still 3 for carbonizing a predetermined amount of carbonizing object of a batch type is provided. A gas cooling pool 5 for cooling the high-boiling-point constituent oil in the produced gas G generated by carbonization in the carbonization still 3 at predetermined temperature for condensation is provided. The produced gas discharged from a gas cooling tank 5 is released into water for preventing the backward flow of the produced gas G. A backward flow preventer 6 for condensing the low-boiling-point constituent oil in the produced gas is provided in the water. An oil separator 11 for separating the low-boiling-point constituent oil from circulated water discharged from the backward flow preventer 6 is provided for performing the partial condensation and recovery of high-boiling-point constituent oil and low-boiling-point constituent oil from the produced gas. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to heating of a carbonization kettle that batch-distills to-be-distilled materials such as shredder dust generated after recycling processing of waste plastics and industrial waste, and to a carbonization facility for recovering oil in the generated gas. .

  Conventionally, industrial waste such as waste plastic has been recycled as materials and parts. For example, about 4 million used cars with a large amount of this type of industrial waste are discharged annually. I am trying to improve it.

  Taking this used car as an example, the waste discharged from a used car can be broadly divided into reusable parts such as engines and electrical components that are recycled as parts, and catalysts and tires that are recycled as materials. There are two types of recycled parts, and used automobile glass only with the outer frame from which these are removed. This used automobile glass is crushed by a crusher to become shredder dust and is mainly disposed of in landfills.

  However, hydrocarbon shredder dust made of composite materials such as sound insulation material, sheet urethane, and bonded resin in the shredder dust is reduced due to shortage of landfill, etc. Are collected and disposed of. In addition, other waste plastics are similarly reduced in weight, and the internal oil is collected and disposed of.

  A dry distillation facility is a facility for reducing the amount of such carbonized shredder dust and waste plastic such as waste plastic (in the following explanation, such a material to be dried is also referred to as “shredder dust”) and recovering oil. is there. There are two types of dry distillation equipment: a continuous method and a batch method. The continuous method has a high processing speed and is suitable for industrialization, but there is a risk of explosion continuously because the measures for leakage of product gas and air are not perfect. On the other hand, the batch method is generally provided with a dry distillation kettle, and the dry distillation kettle is indirectly heated to dry-shresh shredder dust and the like. In the case of this batch-type dry distillation equipment, a water sealing device called a backflow preventer is incorporated to prevent the flow of air into the dry distillation kettle or the leakage of product gas from the dry distillation kettle. However, it is necessary to isolate the dry distillation kettle from the dry distillation equipment when filling the dry kettle with shredder dust or discharging the residue.

  FIG. 3 is an overall schematic diagram showing this type of batch-type dry distillation equipment. As shown in the figure, the carbonization equipment 51 includes a hot air generating furnace 52 that generates high-temperature combustion gas, and a carbonization furnace 54 provided with a carbonization kettle 53 that carbonizes dry matter such as shredder dust with the combustion gas, A backflow preventer 55 for preventing the generated gas generated and discharged from the dry distillation kettle 53 from flowing back with water, a gas cooling tank 56 for recovering the oil by cooling the generated gas discharged from the backflow preventer 55, A gas cleaning tower 57 that cleans the generated gas discharged from the gas cooling tank 56, a gas processing device 58 that removes harmful components from the generated gas discharged from the gas cleaning tower 57, and the gas processing device 58 processed the gas. An exhaust cylinder 59 for releasing the generated gas to the atmosphere is provided.

  A cooling tower 60 for supplying cooling water to the gas cooling tank 56 and the gas cleaning tower 57; an oil / water separator 61 for separating oil from water discharged from the backflow preventer 55 and the gas cleaning tower 57; , An oil separation tank 62 for further separating only the oil from the oil separated by the oil / water separator 61, a recovered oil receiving tank 63 for receiving the oil recovered by the oil separation tank 62, and an oil for storing the oil A tank 64, a circulating water tank 65 for circulating water through the backflow preventer 55, and a water treatment device 66 for processing the water in the circulating water tank 65 so as to be reusable are provided. Reference numerals 67 to 70 are pumps, and 71 and 72 are blowers.

As a prior art of such a carbonization facility, there is one in which a storage water tank is provided between a carbonization furnace and an oil separation tank, and the backflow of generated gas is prevented in this storage water tank (see, for example, Patent Document 1). .)
Japanese Patent No. 3375312 (page 1-2, FIG. 1)

  However, in the dry distillation facility shown in FIG. 3, the product gas is cooled at the same time as the backflow preventer 55, which is a water sealing device provided on the downstream side of the dry distillation kettle 53, to prevent the backflow of the product gas. The product oil in the product gas is condensed in the water in the vessel 55. This product oil contains high-boiling component oil at the heavy oil level and low-boiling component oil at the light oil level. The high-boiling component oil having a high specific gravity and high viscosity has a small difference in specific gravity from water, so And emulsified. In addition, the high boiling point component product oil condensed in the backflow preventer 55 is emulsified by stirring (bubbling) water with the product gas or stirring with a circulating water pump, so that the water and product oil in the backflow preventer 55 are mixed. Even if an attempt is made to separate by providing a separation step, the high boiling point component oil that has been emulsified with water may not be separated even after several days, and the produced oil cannot be recovered efficiently. In addition, if they cannot be separated, they are discarded in an emulsified state, which is difficult to process.

  On the other hand, a carbonization kettle 53 provided in this type of batch-type carbonization equipment is carbonized by indirectly heating a material to be distilled in a carbonization furnace 54. As described above, this batch method can avoid the possibility of explosion, but the processing speed depends on the heating efficiency of shredder dust and the like in the dry distillation kettle. In other words, since shredder dust and the like in the dry distillation kettle 53 can only be efficiently heated about several tens of centimeters from the inside of the kettle, if the dry distillation kettle 53 is too large, from the inner wall (heating surface) around the kettle to the center of the kettle The distance becomes longer, and it becomes difficult for heat to be transmitted to the center of the pot, and it takes time to raise the temperature. From the viewpoint of this processing speed, the smaller the size of the dry distillation kettle 53, the more efficiently the dry distillation can proceed, and it is difficult to increase the size of the dry distillation kettle 53.

  Therefore, when processing a large amount of shredder dust or the like, it is conceivable to prepare and process many small dry distillation kettles 53. In this case, not only the installation space loss but also the shredder dust to the dry distillation kettle 53 etc. Since the number of operations such as filling and discharging of carbonization residue increases, efficient carbonization processing cannot be performed.

  Furthermore, the components of the product gas generated inside the dry distillation kettle 53 include a condensable gas containing a condensate component such as light oil vapor and heavy oil vapor and a non-condensable gas such as hydrogen gas and methane gas. The sex gas becomes saturated steam (included in “product gas” in this specification and claims) in the carbonization kettle 53. Then, the generated gas is discharged from the dry distillation kettle 53 by natural convection only by the generated gas pressure. However, since the bottom of the dry distillation kettle is heated to dry, the inner wall temperature of the dry distillation kettle is low at the upper part where heating is not performed, and the vapor of the condensable gas condenses in this part and remains in the kettle. The recovery rate of the product gas may deteriorate. Therefore, from this point, it is considered difficult to increase the throughput by increasing the size of the dry distillation kettle.

  Therefore, in order to solve the above problems, the present invention provides a dry distillation kettle that batch-distills a predetermined amount of to-be-distilled material in a batch system, a dry distillation furnace that heats the dry distillation kettle with a combustion gas at a predetermined temperature, and A heater that uses the heat of the combustion gas discharged from the furnace is provided, and a blower that circulates part of the generated gas generated by dry distillation in the dry distillation kettle is provided in the heater, and the generated gas that is circulated by the blower is It is configured such that it is heated by a heater and supplied as a circulating gas from the substantially central portion of the dry distillation kettle into the dry distillation kettle.

  In the carbonization equipment, the heated circulating gas may be supplied from the bottom of the carbonization kettle upward to the inside of the kettle.

  Furthermore, there is provided a dry distillation kettle that batch-distills a predetermined amount of to-be-distilled products in a batch system, and a gas cooling tank that cools and condenses high-boiling component oil in the product gas generated by dry distillation in the dry distillation kettle at a predetermined temperature. A reverse flow preventer for discharging the generated gas discharged from the gas cooling tank into the water to prevent the reverse flow of the generated gas and condensing the low boiling point component oil in the generated gas into the water, the reverse flow preventer An oil / water separator that separates low-boiling point component oil from circulating water discharged from the tank is provided so that the high-boiling point component oil and the low-boiling point component oil are fractionated from the product gas and recovered.

  Further, in the dry distillation equipment, a gas cleaning tower for cleaning the generated gas discharged from the backflow preventer by contact with water is provided, and the oil is separated from the water in which the generated gas is cleaned by the gas cleaning tower. In addition, a return pipe that returns the generated gas that has passed through the gas cleaning tower as heating fuel for the dry distillation furnace is provided, and the return pipe is configured to adjust the amount of air necessary for combustion in accordance with the components of the generated gas An air conditioner may be provided to combust the generated gas as fuel.

  Furthermore, in the above-described carbonization equipment, a carbonization furnace for heating the carbonization kettle with a combustion gas of a predetermined temperature is provided, a heater using the heat of the combustion gas discharged from the carbonization furnace is provided, and the carbonization kettle is provided in the heater A blower is provided to circulate a part of the product gas generated by dry distillation in step 1, and the product gas circulated by the blower is heated by the heater to be supplied as a circulation gas from the center of the dry distillation kettle to the inside of the kettle. You may equip the comprised dry distillation pot heating apparatus.

  Moreover, in this dry distillation equipment, the blower may be configured to circulate a part of the product gas from the gas cooling tank so as to circulate a part of the product gas separated from the high-boiling component oil.

  According to the carbonization equipment of the present invention, it is possible to increase the amount of heat in the carbonization kettle, to shorten the carbonization time and to recover the oil content, and to increase the size of the carbonization kettle. Furthermore, it is possible to efficiently collect oil in the dry distillation equipment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall schematic diagram showing a batch-type dry distillation facility according to an embodiment of the present invention. For the sake of explanation, an example will be described in which the material to be distilled is shredder dust or the like, and carbonization is performed with one carbonization kettle.

  As shown in the figure, a dry distillation facility 1 of this embodiment includes a hot air generating furnace 2 for generating high-temperature combustion gas, a dry distillation furnace 4 provided with a dry distillation furnace 3 for dry distillation of shredder dust and the like with the combustion gas, A gas cooling tank 5 that cools the generated gas generated in the kettle 3 to collect oil, a backflow preventer 6 that prevents a backflow of the generated gas discharged from the gas cooling tank 5, and a discharge from the backflow preventer 6 A gas cleaning tower 7 for cleaning the generated gas, a gas processing device 8 for removing harmful components from the generated gas discharged from the gas cleaning tower 7, and an exhaust for releasing the generated gas processed by the gas processing device 8 to the atmosphere A cylinder 9 is provided.

  Further, a cooling tower 10 for supplying cooling water to the gas cooling tank 5 and the gas washing tower 7 is provided, and further, oil water for separating oil from water discharged from the backflow preventer 6 and the gas washing tower 7. A separator 11, an oil separation tank 12 for further separating oil from the oil separated by the oil / water separator 11, a recovered oil receiving tank 13 for collecting oil from the oil separation tank 12, and the oil are stored An oil tank 14, a circulating water tank 15 that circulates water through the backflow preventer 6, and a water treatment device 16 that processes the water in the circulating water tank 15 in a reusable manner are provided.

  Hereinafter, the flow of a specific process by the carbonization equipment 1 comprised by these is demonstrated. The hot air generating furnace 2 is supplied with air from the blower 17 and heavy oil from the fuel tank 18 through the pump 19 and the fuel supply device 20, and the combustion gas generated in the hot air generating furnace 2 is supplied to the dry distillation kettle. 3 is supplied into a dry distillation furnace 4 provided with 3. The combustion gas supplied into the dry distillation furnace 4 is temperature-controlled and adjusted according to the heating temperature of the dry distillation furnace 3. As this adjustment, for example, the fuel supply amount to the burner of the fuel supply device 20 is adjusted. By keeping the inside of the dry distillation furnace 4 at a predetermined dry distillation temperature, the inside of the dry distillation furnace 3 is continuously heated so as to have a uniform dry distillation temperature by heat conduction such as shredder dust, and the heat of dry distillation reaction is maintained by the heat conduction. Like that. The carbonization temperature is maintained by installing the carbonization furnace 3 filled with shredder dust or the like in the carbonization furnace 4 and heating the inside of the carbonization furnace 3 with a burner so as to be in an oxygen-free state. As the dry distillation temperature, when the dry distillation kettle 3 is heated with a combustion gas of about 800 ° C., a generated gas of about 500 ° C. is discharged from the dry distillation kettle 3. The dry distillation kettle 3 is formed with a capacity for batch processing a predetermined amount of shredder dust and the like, and the lower part is heated in the dry distillation furnace 4 and the generated gas is discharged from the upper part.

  The produced gas G discharged from the dry distillation kettle 3 is sent to a gas cooling tank 5 having a function as a heat exchanger and cooled. The gas cooling tank 5 is supplied with cooling water adjusted to a temperature at which high-boiling component oil in the product gas is condensed. This cooling water temperature is adjusted by a cooling water temperature adjusting device such as a temperature adjusting device (not shown) provided in the gas cooling tank 5, for example. This temperature is adjusted to be slightly less than about 100 ° C., and the low boiling point component oil in the shredder dust or the like is not condensed, and only the high boiling point component oil that condenses at 100 ° C. or more is condensed. In addition, by adjusting the temperature in the gas cooling tank 5 at approximately 100 ° C., the moisture in the product gas also passes through the gas cooling tank 5, so that the high-boiling component oil is recovered without being mixed with water. The high boiling point component oil condensed in the gas cooling tank 5 is collected in the oil separation tank 12.

  The produced gas that has passed through the gas cooling tank 5 is sent to a backflow preventer 6 that functions as a water seal device. The backflow preventer 6 prevents the gas from flowing back, and is configured to discharge the generated gas into the water from the opening at the tip of the pipe inserted into the water, and discharge the generated gas from the water from above. . The product gas supplied to the backflow preventer 6 contains low boiling point component oil paper, and is cooled by direct contact with the circulating water supplied by the pump 22 to the backflow preventer 6 so that the low boiling point component oil is Condenses in circulating water. Since this low boiling point component oil has a large difference in specific gravity with water, it condenses without being emulsified with water.

  The product gas that has passed through the backflow preventer 6 further flows to a gas washing tower 7 that removes oil in the product gas. In this gas washing tower 7, even if low-boiling component oil remains in the product gas, it cools and condenses in direct contact with cooling water while passing through. The low boiling point component oil condensed in the gas cleaning tower 7 is discharged from the gas cleaning tower 7 together with the water supplied to the gas cleaning tower 7 from the circulating water tank 15 by the circulating water pump 21. In the gas cleaning tower 7, mist such as tar in the generated gas is removed.

  The circulating water mixed with the low-boiling component oil condensed in the water of the backflow preventer 6 in this way and the water discharged from the gas washing tower 7 are sent to the oil / water separator 11 where water and oil are separated. To be separated. The water mixed with the low-boiling component oil sent to the oil-water separator 11 has a specific gravity difference by the oil-water separator 11 having a retention tank structure without emulsifying with water because the low-boiling component oil has a small specific gravity and a low viscosity. It can be easily separated into water and oil. The separated oil is collected in the oil separation tank 12, and the water flows to the circulating water tank 15.

  Further, the high boiling point component oil from the gas cooling tank 5 that has flowed to the oil separation tank 12 and the low boiling point component oil that has flowed from the oil / water separator 11 are further separated in the oil separation tank 12 having a submarine structure. Only the water is separated and the water is removed. The oil separated in the oil separation tank 12 is collected in the oil tank 14 by the pump 23 via the collected oil receiving tank 13. The water that has flowed to the circulating water tank 15 is circulated by the pump 24, processed by the water treatment device 16, and reused.

  Further, the generated gas cleaned and discharged by the gas cleaning tower 7 contains harmful components such as hydrogen gas and methane gas in the gas, so that the generated gas blower 25 is forced to oxidize by a method such as oxidation treatment. The exhaust gas is discharged to the gas processing device 8 to be processed, and harmful components are removed by the gas processing device 8 and discharged from the exhaust tube 9 to the atmosphere. Note that the combustion gas CG is also discharged from the exhaust tube 9 through the combustion gas blower 26 from the dry distillation furnace 4.

  On the other hand, in this embodiment, the generated gas cleaned and discharged by the gas cleaning tower 7 is a non-condensable gas such as hydrogen gas or methane gas, so that this generated gas is used as the heating fuel for the dry distillation furnace 4. It is configured.

  A return pipe 27 branched from the pipe of the product gas washed and discharged by the gas washing tower 7 and returning the produced gas upstream of the dry distillation furnace 4 is provided. A combustion air adjusting device 28 is provided for adjusting the amount of air necessary for combustion according to the components of the product gas. The combustion air conditioner 28 adjusts the air branched from the valve 29 provided on the inlet side of the blower 17 and supplied to the combustion air conditioner 28 to an amount suitable for combustion according to the components of the generated gas. Thus, the fuel supply device 20 is configured to supply the fuel. The combustion air adjusting device 28 has a function of grasping main components of gas with a calorimeter or the like, and calculating and adjusting an appropriate amount of combustion air by calculation.

Thus, by using the generated gas discharged from the gas cleaning tower 7 as the heating fuel for the dry distillation furnace 4, it is possible to reduce the amount of fuel used such as heavy oil used for heating the dry distillation furnace 4, and It can also contribute to improving the recycling efficiency of dry matter and reducing carbon dioxide (CO ₂ ).

  As described above, in the oiling step in the product gas obtained by dry distillation of shredder dust or the like, before entering the backflow preventer 6 by using partial contraction in which the high-boiling component oil and the low-boiling component oil are separately condensed and recovered. The high-boiling component oil is condensed in the gas cooling tank 5, and the low-boiling component oil that is easily separated from water is condensed and recovered by the backflow preventer 6 that is in direct contact with water.

  Therefore, the high-boiling component oil and the low-boiling component oil in the product gas can be efficiently recovered by partial condensation, and the efficiency of generating oil such as shredder dust can be greatly improved.

  FIG. 2 is a longitudinal sectional view schematically showing a dry distillation kettle according to an embodiment of the present invention. As shown in FIG. 1 described above, in this embodiment, a dry distillation kettle heating device 31 using combustion gas discharged from the dry distillation furnace 4 is provided. The dry distillation kettle heater 31 is supplied with a heater 32 that uses combustion gas discharged from the dry distillation furnace 4 and a part of the generated gas G in the gas cooling tank 5 is supplied to the heater 32 as a circulating gas RG. A circulation gas blower 33 for supplying the circulation gas RG heated by the heater 32 to the dry distillation kettle 3 is provided.

  In this embodiment, a circulation gas blower 33 is provided so that a part of the product gas G is taken out from the gas cooling tank 5 as the circulation gas RG, and one of the product gases obtained by removing the high-boiling component oil from the gas cooling tank 5 is provided. The part is forcibly circulated to the heater 32.

  The heater 32 is a heat exchanger configured to heat the circulating gas RG with a high-temperature combustion gas discharged from the dry distillation furnace 4. The circulating gas RG heated by the heater 32 is supplied from the circulating gas duct 34 to the dry distillation kettle 3.

  As shown in FIG. 2, the circulation gas is supplied to the dry distillation kettle 3 from the upper duct 35 provided at the upper center of the dry distillation kettle 3 to the central part of the dry distillation kettle 3 and at the lower part of the dry distillation kettle 3. And the upward supply from the lower duct 36 toward the inside of the hook. Since the supply position of the circulating gas is substantially the center of the shredder dust SD that is heated along the inner surface of the dry distillation kettle 3, the shredder dust SD can be heated from the inside.

  Further, the combustion gas CG obtained by heating the circulating gas RG with the heater 32 is discharged from the exhaust tube 9 into the atmosphere by the combustion gas blower 26 as described above.

  According to the dry distillation kettle heating device 31 configured as described above, a part of the generated gas G is circulated between the dry distillation kettle 3 and the gas cooling tank 5 as the circulation gas RG by the circulation gas blower 33, and the circulation gas RG. Is heated by the heater 32 using the residual heat of the combustion gas CG discharged from the dry distillation furnace 4 and flows into the dry distillation kettle 3, so that the heat transfer inside the dry distillation kettle 3 is not only the heat transfer of the shredder dust and the like SD, By applying forced convection by the high-temperature circulating gas RG, a larger amount of heat can be transferred, and the dry distillation time can be shortened. In addition, the high-boiling component product gas (condensable gas vapor) that tends to stay in the inside of the dry distillation kettle 3 with the circulation gas RG is forcibly discharged, so that saturated steam generated in the center of the dry distillation kettle 3 having a low temperature, The vapor can be forcibly discharged while condensing vapor, and the oil recovery efficiency in the product gas can be improved.

  Moreover, in this embodiment, the circulating gas is supplied upward from the bottom of the dry distillation kettle 3 to generate forced convection, so that the transfer of heat input from the circumference of the kettle to the center of the kettle is improved, and from the inside of the kettle The generated gas can be forcibly discharged more efficiently.

  In addition, since the circulating gas for heating the shredder dust and the like is heated using the residual heat of the combustion gas discharged from the dry distillation furnace 4, the fuel consumption can be reduced by recovering the heat from the discharged combustion gas.

  Further, since the temperature of the circulating gas flowing into the dry distillation kettle 3 is set higher than the temperature inside the kettle, the dry distillation temperature can be quickly reached even inside the shredder dust and the like, and the dry distillation time can be shortened. In particular, by supplying a high-temperature circulating gas to the central portion of the dry distillation kettle 3, the central portion of the shredder dust and the like that are difficult to be heated can be quickly brought to the dry distillation temperature, so that the dry distillation can be efficiently performed in a short time. Become. Accordingly, it is possible to improve the dry distillation speed of shredder dust and the like.

  Furthermore, since the SD of the shredder dust etc. is also heated from the central part, it becomes possible to efficiently dry distillation even if the size of the dry distillation kettle 3 is increased, and a large amount of shredder dust etc. SD is batched at once with the enlarged dry distillation kettle 3. It becomes possible to process.

  In addition, since the circulating gas RG is supplied from the upper duct 35 and the lower duct 36 to the substantially central portion of the dry distillation kettle 3, a larger amount of shredder dust or the like SD (inner two-dot chain line in FIG. 2) is also provided in the same dry kettle 3. It is also possible to dry distillation at once.

  In addition, as in this embodiment, by supplying a part of the generated gas from the gas cooling tank 5 to the heater 32 as a circulating gas, the generated gas from which the high boiling point component oil has been removed in the gas cooling tank 5 is circulated. Therefore, the recovery efficiency of the high-boiling component oil in the product gas discharged from the dry distillation kettle 3 can be increased.

  Therefore, by providing the dry distillation heating apparatus 31 configured as described above in the dry distillation facility, the batch type that can increase the size of the dry distillation closet 3 and effectively and stably process a large amount of shredder dust and the like SD. It is possible to realize the dry distillation equipment 1.

  In the embodiment shown in FIG. 1 described above, a configuration is provided in which the backflow preventer 6 is provided on the downstream side of the gas cooling tank 5 so that the high-boiling component oil and the low-boiling component oil are contracted, and the heater 32 is provided. In this example, the dry distillation equipment 1 having a configuration in which a part of the generated gas is returned to the dry distillation kettle 3 as a heating gas has been described as an example. It is not limited to the embodiment.

  The above-described embodiment shows an example of the best embodiment, and various modifications can be made without departing from the gist of the present invention. The present invention is not limited to the above-described embodiment. .

  Further, in the above description, a used automobile has been described as an example. However, the material to be dried can be treated in the same manner as long as it can be distilled in a dry distillation kettle even if it is other than shredder dust. The form is not limited.

  According to the invention of the present application, it is possible to efficiently distill a dry matter such as shredder dust and recover oil, which is useful for treating hydrocarbon dry matter in industrial waste.

1 is an overall schematic diagram showing a batch-type dry distillation facility according to an embodiment of the present invention. It is a longitudinal cross-sectional view which shows typically the dry distillation pot which concerns on one Embodiment of this invention. It is the whole schematic figure which shows the conventional batch-type dry distillation equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Carbonization equipment 2 ... Hot-air generator 3 ... Carbonization kettle 4 ... Carbonization furnace 5 ... Gas cooling tank 6 ... Backflow preventer 7 ... Gas washing tower 8 ... Gas treatment device 9 ... Exhaust pipe 10 ... Cooling tower 11 ... Oil-water separator DESCRIPTION OF SYMBOLS 12 ... Oil separation tank 13 ... Collected oil receiving tank 14 ... Oil tank 15 ... Circulating water tank 16 ... Water treatment device 17 ... Blower 18 ... Fuel tank 19 ... Pump 20 ... Fuel supply device 21 ... Circulating water pump 22 ... Pump 23 ... Pump 24 ... Pump 25 ... Producted gas blower 26 ... Combustion gas blower 27 ... Return line 28 ... Combustion air conditioner 29 ... Valve 31 ... Dry distillation kettle heating device 32 ... Heater 33 ... Circulating gas blower 34 ... Circulating gas duct 35 ... Upper duct 36 ... Lower duct G ... Product gas RG ... Circulating gas CG ... Combustion gas SD ... Shredder dust, etc.

Claims (6)

  Provided with a carbonization kettle that batch-distills a predetermined amount of to-be-distilled materials in a batch system, provided with a dry distillation furnace for heating the carbonization kettle with a combustion gas at a predetermined temperature, and provided a heater that uses the heat of the combustion gas discharged from the dry distillation furnace. A blower that circulates a part of the product gas generated by the carbonization in the carbonization kettle is provided in the heater, and the product gas circulated by the blower is heated by the heater to be a circulation gas, A dry distillation facility configured to heat the dry distillation kettle by supplying it from the center to the inside of the dry distillation kettle. In the carbonization equipment according to claim 1,
A dry distillation facility configured to supply the heated circulating gas from the bottom of the dry distillation kettle upward into the kettle.   A distillation tank is provided for batch-distilling a predetermined amount of to-be-distilled products in a batch system, and a gas cooling tank is provided for cooling and condensing the high-boiling component oil in the product gas generated by the dry distillation in the dry distillation tank at a predetermined temperature, The product gas discharged from the gas cooling tank is released into water to prevent backflow of the product gas, and a backflow preventer for condensing the low boiling point component oil in the product gas into water is provided and discharged from the backflow preventer. An oil / water separator that separates low-boiling component oil from the circulating water is provided, and the high-boiling component oil and the low-boiling component oil are fractionated and recovered from the product gas. In the carbonization equipment according to claim 3,
A gas cleaning tower for cleaning the generated gas discharged from the backflow preventer by contact with water is provided, and the gas cleaning tower is configured to separate oil from the water in which the generated gas has been cleaned. A return pipe is provided to return the product gas that has passed through as a heating fuel for the dry distillation furnace, and a combustion air conditioner that adjusts the amount of air necessary for combustion according to the components of the product gas is provided in the return pipe. A dry distillation facility configured to burn gas as fuel. In the carbonization equipment according to claim 3,
A dry distillation furnace that heats the dry distillation kettle with a combustion gas at a predetermined temperature, a heater that uses the heat of the combustion gas discharged from the dry distillation furnace is provided, and a product gas generated by dry distillation in the dry distillation kettle in the heater Provided with a blower that circulates a part of the dry distillation kettle, and heated by the heater so that the generated gas circulated by the blower is supplied as a circulating gas from the center of the dry distillation kettle to the inside of the kettle. Dry distillation equipment. In the carbonization equipment according to claim 5,
A dry distillation facility in which the blower is configured to circulate a part of the product gas from the gas cooling tank to circulate a part of the product gas separated from the high-boiling component oil.

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