CN112812792A - Internal heat rotary anaerobic pyrolysis system and method for treating solid waste by using same - Google Patents
Internal heat rotary anaerobic pyrolysis system and method for treating solid waste by using same Download PDFInfo
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- CN112812792A CN112812792A CN202011600827.8A CN202011600827A CN112812792A CN 112812792 A CN112812792 A CN 112812792A CN 202011600827 A CN202011600827 A CN 202011600827A CN 112812792 A CN112812792 A CN 112812792A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/30—Other processes in rotary ovens or retorts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/32—Other processes in ovens with mechanical conveying means
- C10B47/44—Other processes in ovens with mechanical conveying means with conveyor-screws
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/07—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of solid raw materials consisting of synthetic polymeric materials, e.g. tyres
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
Abstract
The invention discloses an internal heat rotary anaerobic pyrolysis system and a method for treating solid waste by using the same. The system comprises an axis full-premixing combustion radiant tube heating system, a rotary pyrolysis system, a pyrolysis steam spraying and condensing system, a pyrolysis carbon discharging system, a pyrolysis gas combustion control system and a tail gas treatment system. Pyrolysis gas generated by solid waste is combusted and heated in the axial full-premix combustion radiant tube, a gradient temperature interval is formed in the cavity according to a heat transfer mode of radial combustion of the axial full-premix combustor, and materials are subjected to progressive pyrolysis reaction in the cavity. Different oil, gas and carbon products can be produced according to different material conditions; pyrolysis gas gets into and sprays condensing system and divides out pyrolysis gas and pyrolysis oil, and pyrolysis gas gets into axle center full premix combustor after mixing with the air, realizes that pyrolysis reaction device stabilizes high-efficient operation, reduces the pyrolysis energy consumption, promotes different product demand and economic value simultaneously.
Description
Technical Field
The invention relates to the technical field of garbage pyrolysis, in particular to an internal heat rotary type anaerobic pyrolysis system and a method for treating solid waste by using the same.
Background
With the continuous promotion of industrialization and urbanization, urban solid wastes are continuously increased and complex in components, according to annual newspaper for preventing and treating the environmental pollution of the solid wastes of the national and middle cities in 2019, the generation amount of the general industrial solid wastes of the national and middle cities in 2018 is 15.5 million tons, the comprehensive utilization amount is 8.6 million tons, the dumping and discarding amount is 4.6 million tons, the comprehensive utilization amount of the general industrial solid wastes accounts for 41.7 percent of the total utilization and disposal amount, and if the solid wastes are not well treated, the natural environment and the human life are greatly influenced. The solid waste is subjected to resource treatment, so that the pollution to the environment can be prevented, the resources are saved, and the huge economic benefit can be brought. Therefore, the technical research on the aspect is strengthened, and the method has important significance for recycling the industrial solid waste.
The pyrolysis method is to perform high-temperature treatment under the condition of no oxygen or oxygen deficiency, and when the pyrolysis system reaches a certain temperature, organic matter C-C bonds and C-H bonds are broken to obtain molecular hydrocarbons with different lengths, so as to generate pyrolysis gas, pyrolysis oil and pyrolysis solid residues. Compared with a combustion method, the gas amount generated in the pyrolysis process is small, and the generation of toxic and harmful gases such as furan substances, dioxin and the like can be inhibited because the reaction is carried out under the condition of no oxygen or oxygen deficiency; the pyrolysis gas and the pyrolysis oil can be reused as fuel or chemical raw materials, and the energy utilization efficiency is high; the coke in the pyrolytic solid residue has reducibility, can inhibit the oxidation of metal substances to a certain extent, can also inhibit the formation of halides, and the solid carbon black can also be used as a building material. The method not only can realize harmless treatment, but also can realize resource recovery and reutilization of industrial solid wastes, has lower secondary pollution emission, and has wide development prospect.
There are many methods and apparatuses in the prior art of pyrolysis, most commonly horizontal reactors, and some patented technologies, such as a regenerative pyrolysis furnace (CN 107588423 a), an anaerobic pyrolysis treatment system of garbage (CN 201720162932), etc. However, the prior art cannot effectively control the quality of three products, namely oil, gas and carbon, under the condition of a certain temperature, for example, the invention application "an anaerobic pyrolysis treatment system of garbage (CN 201720162932)" mentions the recycling of waste heat, but cannot adjust the yield and quality of oil, gas and carbon as required when the pyrolysis temperature needs to be changed to adjust the yield and quality of oil, gas and carbon; the invention patent 'a heat accumulating type pyrolysis furnace (CN 107588423A)' provides a heat accumulating type pyrolysis furnace for recycling flue gas after combustion, but the system has larger space around a waste heat heating furnace body and low heat utilization rate, and can not realize better effects of energy conservation and stable operation.
In view of the fact that the existing anaerobic pyrolysis technology and system cannot economically and efficiently utilize the waste heat of the flue gas and adjust the proportion and quality of oil, gas and carbon, the invention provides a waste pyrolysis system and method which are efficient, economical and capable of stably operating, so that high-quality oil, gas and pyrolytic carbon can be recovered from different wastes, and the system and method have important value and significance for comprehensive utilization of pyrolysis treatment of solid wastes at the present stage.
Disclosure of Invention
The invention aims to solve the problem that an innovative scheme is provided aiming at the defects in the prior art, in particular to an anaerobic pyrolysis system scheme which can effectively utilize the heat of waste heat flue gas to realize stable pyrolysis, reduce the operation energy consumption of equipment and simultaneously obtain oil, gas and carbon products with different proportions.
In order to solve the problems, the invention adopts the following scheme: the utility model provides an interior heat rotation type anoxybiotic pyrolysis system which characterized in that, includes axle center full premix burning radiant tube heating system, rotation pyrolysis system, pyrolysis vapour sprays condensing system, pyrolysis charcoal discharge system, pyrolysis vapour combustion control system and tail gas processing system.
The axial center fully premixed combustion radiant tube heating system is arranged in the rotary pyrolysis system; the rotary pyrolysis system is used for heating materials in an anaerobic pyrolysis manner, and is divided into a heat radiation low-temperature area, a medium-temperature area and a high-temperature area according to a heat transfer mode that pyrolysis gas is combusted from right to left in a radial combustion manner, so that the materials are pyrolyzed progressively; through setting up material advancing direction and pyrolysis gas combustion direction opposite, the material gets into from the head of rotation pyrolysis barrel, and pyrolysis gas air mixture gets into from the end of rotation pyrolysis barrel for the material passes through heat radiation low-temperature region, well warm-zone, high-temperature area in proper order, realizes the material pyrolysis that advances.
The rotary pyrolysis system rotates in a rotary mode and is used for performing rotary pyrolysis reaction on materials to produce pyrolytic carbon and pyrolytic steam; wherein the pyrolytic carbon is discharged through a pyrolytic carbon discharging system, and pyrolytic steam is directly proportioned and combusted according to proportion and quality or enters a pyrolytic steam spraying and condensing system; the materials are subjected to progressive pyrolysis to generate pyrolytic carbon and pyrolytic steam, wherein the pyrolytic carbon is discharged from the tail end of the rotary pyrolysis cylinder; the pyrolysis gas enters a pyrolysis gas combustion control system to be mixed and combusted with air according to actual requirements, or enters a pyrolysis gas spraying and condensing system to be separated into pyrolysis oil and pyrolysis gas, and the pyrolysis gas enters the pyrolysis gas combustion control system to be mixed and combusted with the air; pyrolysis steam is controlled and distributed through the three-phase disc valve.
The pyrolysis steam spraying and condensing system is used for receiving pyrolysis steam and separating the pyrolysis steam through water spraying and condensing to obtain pyrolysis steam and an oil-water mixture; wherein the pyrolysis gas is sent into a pyrolysis gas combustion control system, the oil-water mixture is sent into an oil-water separation device for re-separation to obtain pyrolysis oil and pyrolysis water, and the pyrolysis water is used for cyclic spraying of a pyrolysis gas spraying and condensing system;
and the pyrolytic carbon discharging system is arranged at the tail part of the rotary pyrolysis system and is used for discharging pyrolytic carbon produced by the rotary pyrolysis system.
The pyrolysis gas combustion control system is used for mixing pyrolysis gas generated by the rotary pyrolysis system under different conditions and/or pyrolysis gas generated by the pyrolysis gas spraying and condensing system with air, controlling flow to heat and combust, and adjusting according to the temperature of the rotary pyrolysis system.
And the tail gas treatment system is used for filtering, purifying and discharging hot air which is subjected to combustion waste heat utilization by the pyrolysis gas combustion control system.
Further, according to the design scheme, the internal heat rotary type anaerobic pyrolysis system is characterized by comprising a feed hopper, a feeding screw conveyor, a rotary type pyrolysis cylinder, a pyrolysis steam outlet and a pyrolysis carbon outlet; the feed hopper is connected with the feeding screw conveyor; the feeding screw conveyor is communicated with the rotary pyrolysis cylinder; the rotary pyrolysis cylinder comprises a heat insulation shell heat insulation layer and a cylinder inner side mirror reflection device; the axis full-premix combustion radiant tube heating system is arranged along the axis of the rotary pyrolysis cylinder; a cavity between the axis full-premix combustion radiant tube heating system and the rotary pyrolysis cylinder is a thermal radiation anaerobic pyrolysis area; the pyrolysis steam outlet is arranged above the rotary pyrolysis cylinder; the pyrolytic carbon outlet is arranged below the rotary pyrolysis cylinder; the pyrolysis gas outlet is communicated with a pyrolysis gas spraying and condensing system and a pyrolysis gas combustion control system through a three-phase disc valve; and the pyrolytic carbon outlet is communicated with a pyrolytic carbon discharging system.
Further, according to the above design scheme, the internal heat rotary type anaerobic pyrolysis system is characterized in that the axis full premix combustion radiant tube heating system comprises a full premix combustion tube, a temperature controller and a heat radiation tube arranged around the full premix combustion tube in a surrounding manner; the full premix combustion pipe is connected with the pyrolysis gas combustion control system through an air inlet pipe.
Further, according to the design scheme, the internal heat rotary type oxygen-insulated pyrolysis system is characterized in that the pyrolysis steam spraying and condensing system comprises a spray tower, an oil-water separation device and a circulating water pump; the spray tower comprises a spray header, a spray tower pyrolysis gas outlet, a spray tower pyrolysis gas inlet and an oil-water mixture outlet; the pyrolysis gas outlet of the spray tower is arranged at the top of the spray tower; the pyrolysis steam inlet of the spray tower is arranged in the middle of the spray tower; the spray header is arranged between the spray tower pyrolysis gas outlet and the spray tower pyrolysis gas inlet; the oil-water mixture outlet is arranged at the bottom of the spray tower and is communicated with the oil-water separation device through a circulating water pump; the oil-water separation device is provided with a pyrolysis water outlet and a pyrolysis oil outlet; the pyrolysis water outlet is communicated with the spray header.
Further, according to the above design scheme, the internal heat rotary type anaerobic pyrolysis system is characterized in that the pyrolysis gas combustion control system comprises an air mixing delivery pump and a temperature and pressure controller; according to the proportion of the generated pyrolysis gas, the pyrolysis gas generated by the pyrolysis gas through the three-phase disc-type valve and the pyrolysis gas spraying and condensing system is mixed with air under the action of the air mixing and conveying pump, and then the mixture is regulated by the temperature and pressure controller and conveyed to the axle center full-premixing combustion radiant tube heating system.
Furthermore, according to above-mentioned design a interior heat rotation type anoxybiotic pyrolysis system, its characterized in that, pyrolytic carbon discharge system includes spiral ejection of compact page or leaf board, and the pyrolytic carbon rotates along with the barrel through spiral page or leaf board and discharges, later carries the pyrolytic carbon of discharge through ejection of compact screw conveyer.
Further, according to the above design scheme, the internal heat rotary type oxygen-insulated pyrolysis system is characterized in that the rotary type pyrolysis system and the feeding screw conveyor are respectively provided with an air seal, so that oxygen-insulated pyrolysis is realized.
Further, according to the above design scheme, the internal heat rotary type oxygen-insulated pyrolysis system is characterized in that the medium of the fully premixed combustion tube in the axis fully premixed combustion radiant tube heating system is a honeycomb ceramic type porous medium or a foamed ceramic type porous medium.
Further, according to the design scheme, the method for treating the solid waste comprises the following steps: solid waste is pretreated and then is sent into a rotary pyrolysis system through a feed hopper and a feeding screw conveyor, anaerobic pyrolysis reaction is carried out in an interlayer cavity of a rotary pyrolysis cylinder and a heat radiation tube, an external fuel gas and air are added by a pyrolysis gas combustion control system to heat and raise the temperature to the temperature required by the system in the starting stage, and then pyrolysis gas is used for heating the rotary pyrolysis system through an axis full-premix combustion radiation tube heating system; the interlayer cavity of the pyrolysis cylinder body and the heat radiation pipe rotating along the axis is kept to form a gradient temperature interval and a good radiation heating effect through the heat insulation layer of the heat insulation shell and the mirror surface reflection device on the inner side of the cylinder body; the produced pyrolytic carbon is discharged out of the rotary pyrolysis cylinder through a spiral discharging vane plate and then is discharged to a receiving hopper through a discharging spiral conveyor, the surplus pyrolysis steam enters pyrolysis steam spraying and condensing system oil according to the required conditions of materials and products, and pyrolysis water is recycled for spraying and using; and the pyrolysis gas and the air are conveyed to the axial center full-premixing combustion radiant tube heating system through an air mixing conveying pump to be combusted to generate heat, and then the pyrolysis gas and the air enter a tail gas treatment system to be filtered and purified, and finally the pyrolysis gas and the air are discharged in a qualified mode.
The internal heat rotary anaerobic pyrolysis system provided by the invention has the advantages that materials include but are not limited to rubber tires, plastics, oily sludge, waste integrated circuits, organic hazardous wastes and the like.
The invention has the following technical effects: (1) according to the invention, different solid wastes are subjected to anaerobic pyrolysis, and oil, gas and carbon pyrolysis products with different qualities and proportions can be obtained according to condition settings, so that different product requirements and economic values are improved.
(2) By utilizing the axial center full-premixing combustion radiant tube heating system and adopting the honeycomb type ceramic porous medium structure or the foamed ceramic type porous medium structure combustor, the external heating mode of the cylinder of the conventional pyrolysis reaction device is changed, the combustion efficiency is improved according to the heat transfer mode of radial combustion of the axial center full-premixing combustor, different temperature intervals are formed, good oxygen insulation pyrolysis efficiency is realized, and the utilization efficiency of the combustion heat of pyrolysis gas is improved.
Drawings
FIG. 1 is a schematic diagram of an internally heated rotary anaerobic pyrolysis system.
FIG. 2 is a schematic cross-sectional view of an axial premixed combustion radiant tube heating system.
Wherein, 1 feeder hopper, 2 feeding screw conveyer, 3 rotation pyrolysis systems, 4 axle center full premix burning radiant tube heating system, 5 thermal-insulated shell heat preservation, 6 pyrolysis gas export, 7 ejection of compact screw conveyer, 8 three-phase dish through valves, 9 spray towers, 10 spray tower pyrolysis gas export, 11 spray tower pyrolysis gas import, 12 shower heads, 13 oil-water mixture export, 14 oil-water separation device, 15 pyrolysis water export, 16 pyrolysis oil export, 17 air mixing delivery pump, 18 temperature pressure controller, 19 tail gas processing systems, 20 heat radiation sleeve pipes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1: an internal heat rotary type anaerobic pyrolysis system is characterized by comprising an axis full premix combustion radiant tube heating system, a rotary type pyrolysis system, a pyrolysis steam spraying and condensing system, a pyrolysis carbon discharging system, a pyrolysis gas combustion control system and a tail gas treatment system;
the heating system of the axial center full premix combustion radiant tube comprises: the device comprises a fully premixed combustion pipe, a temperature controller and a heat radiation pipe arranged around the combustion pipe in a surrounding manner, and is used for heating materials in an oxygen-free pyrolysis manner, and forming a heat radiation low-temperature area, a medium-temperature area and a high-temperature area according to a heat transfer mode of radial combustion from right to left in the combustion of pyrolysis gas, so that the materials are pyrolyzed progressively; and the full-premixing combustion pipe is connected with an air inlet pipe of the pyrolysis gas combustion system.
A rotary pyrolysis system: the rotary type pyrolysis device is used for rotary type pyrolysis reaction of materials and comprises a feed hopper, a feed screw conveyor, a rotary type pyrolysis cylinder, a pyrolysis steam outlet and a pyrolysis carbon outlet; the feed hopper is connected with the feeding screw conveyor and is used for conveying the pretreated materials into the rotary pyrolysis reaction system; the rotary pyrolysis cylinder comprises a heat insulation shell heat insulation layer and a cylinder inner side mirror reflection device, and a heat radiation area is changed to be concentrated in a cavity between the inner radiation heating pipe and the pyrolysis cylinder, so that the heat energy utilization efficiency is improved; the pyrolysis steam outlet is connected with the three-way valve and the pyrolysis steam spraying and condensing system; the pyrolytic carbon outlet sets up spiral ejection of compact page or leaf board, according to the spiral ejection of compact when the barrel is rotatory, spiral discharge gate and pyrolytic carbon ejection of compact system connection. The pyrolysis oil gas is directly proportioned and combusted according to the proportion and the mass or enters a pyrolysis gas spraying and condensing system;
pyrolysis steam sprays condensing system: comprises a spray tower, a pyrolysis oil-water separation device and a circulating water pump; the spray tower comprises a water spray head, a spray tower pyrolysis gas outlet, a pyrolysis gas inlet and a pyrolysis oil-water condensation outlet; separating the pyrolysis gas by water spraying and condensation, sending the separated pyrolysis gas into a pyrolysis gas combustion control system, re-separating the oil-water mixture to obtain pyrolysis oil and pyrolysis water, and circularly spraying the pyrolysis water for use;
pyrolytic carbon discharge system: discharging pyrolysis residues of the materials along with the rotation of the cylinder through a spiral discharging vane plate, and then conveying the pyrolysis residues to a discharging hopper through a spiral conveyor;
pyrolysis gas combustion control system: comprises a pyrolysis gas and air mixing pump and a temperature and pressure controller; according to the generation proportion of pyrolysis gas, the pyrolysis gas generated by the pyrolysis gas through a three-phase disc valve or a pyrolysis gas spraying and condensing system is mixed with air, and then is regulated by a mixed gas temperature and pressure controller and then is conveyed to an axis full-premix burner. The device is used for controlling the flow rate and heating and burning of the anaerobic pyrolysis system under different conditions and temperatures, and adjusting the temperature according to the pyrolysis system;
and (3) a tail gas treatment system: the device is used for filtering, purifying and discharging hot air after pyrolysis gas combustion waste heat utilization.
In the internal heat rotary anaerobic pyrolysis system, the materials include but are not limited to rubber tires, plastics, oily sludge, waste integrated circuits, organic hazardous wastes and the like. Solid waste is sent into a feed hopper after being pretreated and is spirally sent into a rotary pyrolysis system, anaerobic pyrolysis reaction is carried out in a cavity of a clamping layer of a rotary pyrolysis cylinder and an axis heating radiation pipe, a pyrolysis gas combustion control system is utilized to carry out external gas and air mixing heating and temperature rise to the temperature required by the system in the starting stage of a pyrolysis reactor, then pyrolysis gas is utilized to heat a pyrolysis device through the axis combustion radiation pipe, and a gradient temperature interval and a good radiation heating effect are kept to be formed along the cavity of the axis burner through a heat insulation shell heat insulation layer and a mirror surface reflection device on the inner side of the cylinder; the produced pyrolytic carbon is discharged out of the rotary pyrolysis cylinder through the helical blades and then is discharged to a receiving hopper through a screw conveyor, and the surplus pyrolysis steam enters a pyrolysis steam spraying and condensing system according to the required conditions of materials and products; pyrolysis gas and pyrolysis oil are separated from the pyrolysis gas through a spray condensing system, and pyrolysis water is recycled for spraying; and the pyrolysis gas and the air are conveyed to the axis heating burner radiation system through a mixed air pump, and then enter a tail gas treatment system for filtration and purification treatment, and finally are discharged in a qualified mode.
Example 2: processing the collected and transported automobile tires by using the system, crushing 1000kg of tires to 3-5cm in particle size after steel wires are removed, adding the crushed tires into a feed hopper for one time, spirally feeding the crushed tires into a rotary pyrolysis system, introducing inert gas and air into the feed hopper at the early stage of starting to keep the anaerobic condition of the system, adding natural gas and air into the system for heating to 650 ℃ set in the system in the starting stage of a pyrolysis reactor, converging the radiant heat of an axial combustion radiant tube and the specular reflection device at the inner side of a cylinder, forming a low-temperature region, a medium-temperature region and a high-temperature region in a sandwich cavity of the pyrolysis reaction system, wherein the low-temperature region of the feed inlet is about 500 ℃, the medium-temperature region is about 560 ℃, the high-temperature region is about 650 ℃, carrying out anaerobic pyrolysis reaction for 7 hours, discharging the produced pyrolytic carbon after cooling for 2 hours out of the rotary pyrolysis cylinder through a spiral blade, then discharging, pyrolysis gas and pyrolysis oil are separated from the pyrolysis gas generated in the period through a spraying and condensing system, the pyrolysis oil is about 450kg, and pyrolysis water is recycled and sprayed; and the pyrolysis gas and the air are conveyed to the axial heating burner radiation system through a mixed air pump to be burnt to supply heat to the pyrolysis system, if the redundant pyrolysis gas can be hydraulically recovered, the burnt pyrolysis gas enters a tail gas treatment system to be filtered and purified, and finally the qualified exhaust is discharged.
Claims (9)
1. An internal heat rotary type anaerobic pyrolysis system is characterized by comprising an axis full premix combustion radiant tube heating system, a rotary type pyrolysis system, a pyrolysis steam spraying and condensing system, a pyrolysis carbon discharging system, a pyrolysis gas combustion control system and a tail gas treatment system;
the axial center fully premixed combustion radiant tube heating system is arranged in the rotary pyrolysis system; the rotary pyrolysis system is used for heating materials in an anaerobic pyrolysis manner, and is divided into a heat radiation low-temperature area, a medium-temperature area and a high-temperature area according to a heat transfer mode that pyrolysis gas is combusted from right to left in a radial combustion manner, so that the materials are pyrolyzed progressively;
the rotary pyrolysis system rotates in a rotary mode and is used for performing rotary pyrolysis reaction on materials to produce pyrolytic carbon and pyrolytic steam; wherein the pyrolytic carbon is discharged through a pyrolytic carbon discharging system, and pyrolytic steam is directly proportioned and combusted according to proportion and quality or enters a pyrolytic steam spraying and condensing system;
the pyrolysis steam spraying and condensing system is used for receiving pyrolysis steam and separating the pyrolysis steam through water spraying and condensing to obtain pyrolysis steam and an oil-water mixture; wherein the pyrolysis gas is sent into a pyrolysis gas combustion control system, the oil-water mixture is sent into an oil-water separation device for re-separation to obtain pyrolysis oil and pyrolysis water, and the pyrolysis water is used for cyclic spraying of a pyrolysis gas spraying and condensing system;
the pyrolytic carbon discharging system is arranged at the tail part of the rotary pyrolysis system and is used for discharging pyrolytic carbon produced by the rotary pyrolysis system;
the pyrolysis gas combustion control system is used for mixing pyrolysis gas generated by the rotary pyrolysis system under different conditions and/or pyrolysis gas generated by the pyrolysis gas spraying and condensing system with air, controlling flow to heat and combust, and adjusting according to the temperature of the rotary pyrolysis system;
and the tail gas treatment system is used for filtering, purifying and discharging hot air which is subjected to combustion waste heat utilization by the pyrolysis gas combustion control system.
2. The internal heat rotary anaerobic pyrolysis system of claim 1, wherein the rotary pyrolysis system comprises a feed hopper, a feed screw conveyor, a rotary pyrolysis cylinder, a pyrolysis vapor outlet, a pyrolysis char outlet; the feed hopper is connected with the feeding screw conveyor; the feeding screw conveyor is communicated with the rotary pyrolysis cylinder; the rotary pyrolysis cylinder comprises a heat insulation shell heat insulation layer and a cylinder inner side mirror reflection device; the axis full-premix combustion radiant tube heating system is arranged along the axis of the rotary pyrolysis cylinder; a cavity between the axis full-premix combustion radiant tube heating system and the rotary pyrolysis cylinder is a thermal radiation anaerobic pyrolysis area; the pyrolysis steam outlet is arranged above the rotary pyrolysis cylinder; the pyrolytic carbon outlet is arranged below the rotary pyrolysis cylinder; the pyrolysis gas outlet is communicated with a pyrolysis gas spraying and condensing system and a pyrolysis gas combustion control system through a three-phase disc valve; and the pyrolytic carbon outlet is communicated with a pyrolytic carbon discharging system.
3. The internal heat rotary type anaerobic pyrolysis system according to claim 1, wherein the axial center fully premixed combustion radiant tube heating system comprises a fully premixed combustion tube, a temperature controller and a heat radiation tube arranged around the fully premixed combustion tube in a surrounding manner; the full premix combustion pipe is connected with the pyrolysis gas combustion control system through an air inlet pipe.
4. The internal heat rotary type anaerobic pyrolysis system according to claim 1, wherein the pyrolysis steam spray condensing system comprises a spray tower, an oil-water separation device and a circulating water pump; the spray tower comprises a spray header, a spray tower pyrolysis gas outlet, a spray tower pyrolysis gas inlet and an oil-water mixture outlet; the pyrolysis gas outlet of the spray tower is arranged at the top of the spray tower; the pyrolysis steam inlet of the spray tower is arranged in the middle of the spray tower; the spray header is arranged between the spray tower pyrolysis gas outlet and the spray tower pyrolysis gas inlet; the oil-water mixture outlet is arranged at the bottom of the spray tower and is communicated with the oil-water separation device through a circulating water pump; the oil-water separation device is provided with a pyrolysis water outlet and a pyrolysis oil outlet; the pyrolysis water outlet is communicated with the spray header.
5. The internal heat rotary anaerobic pyrolysis system of claim 1, wherein the pyrolysis gas combustion control system comprises an air mixing delivery pump, a temperature pressure controller; according to the proportion of the generated pyrolysis gas, the pyrolysis gas generated by the pyrolysis gas through the three-phase disc-type valve and the pyrolysis gas spraying and condensing system is mixed with air under the action of the air mixing and conveying pump, and then the mixture is regulated by the temperature and pressure controller and conveyed to the axle center full-premixing combustion radiant tube heating system.
6. The internal heat rotary type anaerobic pyrolysis system according to claim 1, wherein the pyrolytic carbon discharging system comprises a spiral discharging vane, the pyrolytic carbon is discharged by the spiral discharging vane along with the rotation of the cylinder body, and then the pyrolytic carbon is conveyed and discharged by a discharging spiral conveyor.
7. The internal heat rotary anaerobic pyrolysis system as claimed in claim 2, wherein the rotary pyrolysis system and the feeding screw conveyer are provided with air seals to realize anaerobic pyrolysis.
8. The internal heat rotary type anaerobic pyrolysis system according to claim 3, wherein the medium of the fully premixed combustion tube in the axial fully premixed combustion radiant tube heating system is a honeycomb ceramic type porous medium or a foamed ceramic type porous medium.
9. The internal heat rotary anaerobic pyrolysis system as claimed in claims 1-8, wherein the method for treating the solid waste is as follows: solid waste is pretreated and then is sent into a rotary pyrolysis system through a feed hopper and a feeding screw conveyor, anaerobic pyrolysis reaction is carried out in an interlayer cavity of a rotary pyrolysis cylinder and a heat radiation tube, an external fuel gas and air are added by a pyrolysis gas combustion control system to heat and raise the temperature to the temperature required by the system in the starting stage, and then pyrolysis gas is used for heating the rotary pyrolysis system through an axis full-premix combustion radiation tube heating system; the interlayer cavity of the pyrolysis cylinder body and the heat radiation pipe rotating along the axis is kept to form a gradient temperature interval and a good radiation heating effect through the heat insulation layer of the heat insulation shell and the mirror surface reflection device on the inner side of the cylinder body; the produced pyrolytic carbon is discharged out of the rotary pyrolysis cylinder through a spiral discharging vane plate and then is discharged to a receiving hopper through a discharging spiral conveyor, the surplus pyrolysis steam enters pyrolysis steam spraying and condensing system oil according to the required conditions of materials and products, and pyrolysis water is recycled for spraying and using; and the pyrolysis gas and the air are conveyed to the axial center full-premixing combustion radiant tube heating system through an air mixing conveying pump to be combusted to generate heat, and then the pyrolysis gas and the air enter a tail gas treatment system to be filtered and purified, and finally the pyrolysis gas and the air are discharged in a qualified mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011600827.8A CN112812792A (en) | 2020-12-30 | 2020-12-30 | Internal heat rotary anaerobic pyrolysis system and method for treating solid waste by using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011600827.8A CN112812792A (en) | 2020-12-30 | 2020-12-30 | Internal heat rotary anaerobic pyrolysis system and method for treating solid waste by using same |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003307388A (en) * | 2002-04-15 | 2003-10-31 | Nippon Furnace Kogyo Kaisha Ltd | Rotary kiln |
| CN204939394U (en) * | 2015-08-18 | 2016-01-06 | 江苏鼎新环保科技有限公司 | Rotary type continuous pyrolysis stalk coke oven |
| CN107891053A (en) * | 2017-11-29 | 2018-04-10 | 神雾科技集团股份有限公司 | A kind of method and system of old circuit board Pyrolyzation and debromination processing |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003307388A (en) * | 2002-04-15 | 2003-10-31 | Nippon Furnace Kogyo Kaisha Ltd | Rotary kiln |
| CN204939394U (en) * | 2015-08-18 | 2016-01-06 | 江苏鼎新环保科技有限公司 | Rotary type continuous pyrolysis stalk coke oven |
| CN107891053A (en) * | 2017-11-29 | 2018-04-10 | 神雾科技集团股份有限公司 | A kind of method and system of old circuit board Pyrolyzation and debromination processing |
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