CN108148605B - Combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system - Google Patents
Combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system Download PDFInfo
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- CN108148605B CN108148605B CN201611096025.1A CN201611096025A CN108148605B CN 108148605 B CN108148605 B CN 108148605B CN 201611096025 A CN201611096025 A CN 201611096025A CN 108148605 B CN108148605 B CN 108148605B
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 124
- 239000002028 Biomass Substances 0.000 title claims abstract description 79
- 238000010438 heat treatment Methods 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 239000003610 charcoal Substances 0.000 title claims description 19
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000009833 condensation Methods 0.000 claims abstract description 26
- 230000005494 condensation Effects 0.000 claims abstract description 26
- 238000003860 storage Methods 0.000 claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 13
- 238000005235 decoking Methods 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 73
- 238000003763 carbonization Methods 0.000 claims description 29
- 238000004321 preservation Methods 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 17
- 238000005516 engineering process Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000779 smoke Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000011490 mineral wool Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 6
- 238000010924 continuous production Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 25
- 238000000034 method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000012075 bio-oil Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002296 pyrolytic carbon Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
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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
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
-
- 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
-
- 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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1011—Biomass
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Coke Industry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a combined heating type biomass continuous cascade pyrolysis carbon gas co-production system which comprises a feeding device, a combined heating type biomass continuous cascade pyrolysis device, a pyrolysis gas secondary condensation separation device, a high-voltage electrostatic decoking and dust removal device, a pyrolysis gas oil washing device, a gas storage device, an oil storage tank, a cooling carbon discharging device and the like, wherein the front end of the combined heating type biomass continuous cascade pyrolysis device is the feeding device, and the rear end of the combined heating type biomass continuous cascade pyrolysis device is connected in series with the pyrolysis gas secondary condensation separation device, the high-voltage electrostatic decoking and dust removal device, the pyrolysis gas oil washing device and the gas storage device in sequence. The combined heating type biomass continuous cascade pyrolysis device adopts the rotary drums with the inner embedded parts and the outer embedded parts in opposite spiral directions to convey materials, the shoveling plate is arranged inside the inner rotary drum, and the spiral is arranged inside the outer rotary drum and is respectively used for effectively drying and rapidly pyrolyzing the materials, so that biomass pyrolysis cascade continuous production and efficient energy utilization are realized.
Description
Technical Field
The invention belongs to the technical field of renewable energy sources, and particularly relates to a combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system, which can realize cascade pyrolysis and ordered conveying of materials in a biomass continuous carbonization process and is suitable for development of a biomass pyrolysis charcoal gas oil co-production system.
Background
The method has the advantages that the method has rich agricultural and forestry waste resources in China, and the annual crop yield is counted to be about 9 hundred million tons, which is approximately converted into 4.5 hundred million tons of standard coal, and a large amount of waste straws are burned in the field, so that a large amount of biomass energy is wasted, and serious pollution is caused to the environment. Biomass thermochemical conversion technology refers to technology that converts biomass into high quality fuel under heating conditions using chemical means. The biomass carbonization charcoal gas oil co-production technology refers to a process that biomass raw materials are heated in an anaerobic or low-oxygen environment to cause molecular internal decomposition to form charcoal, bio-oil and biomass gas, and belongs to a biomass thermochemical conversion technology. According to the continuity of the production process, the fixed bed biomass carbonization technology and the moving bed biomass carbonization technology are mainly developed in China at present. The moving bed biomass carbonization equipment has the advantages of good production continuity, high production rate, stable product quality and the like, and becomes the key point of the development of biomass carbonization technical equipment. The continuous carbonization poly-generation technical equipment for biomass has bottlenecks in the aspects of stable and orderly conveying of materials, high-temperature-resistant sealing and transmission, safety early warning and explosion prevention, combined tar removal and the like, breaks through the key technologies, and can provide important technical support for the development of the continuous carbonization poly-generation equipment for biomass pyrolysis.
According to the material flow direction, the biomass carbonization technology can be divided into a transverse flow moving bed biomass carbonization technology and a vertical flow moving bed biomass carbonization technology, wherein the material movement of the transverse flow moving bed carbonization technology adopts a material pushing mechanism such as a spiral or a rotary drum, and the material movement of the vertical flow moving bed carbonization technology mainly depends on the self weight of the material. Patent CN102816581a discloses a vertical flow mobile biomass pyrolysis device, which adopts a hot blast stove using firewood as fuel as a heat source, and realizes biomass carbonization carbon gas oil co-production by an external heating mode; patent CN102936507a discloses a crawler-type pyrolysis reactor, which strengthens heat transfer in the carbonization process by moderate extrusion of crawler to materials; CN104910937a adopts multistage spiral conveying material, realizing continuous carbonization of the material; CN102032553a discloses a rotary carbonization furnace, which adopts a drum to convey materials and adopts exogenous heating pyrolysis.
The continuous conveying of materials is realized by adopting the forms of spiral, rotary drum, caterpillar band or dead weight, etc., the basic requirement of continuous carbonization of biomass is satisfied, but the system amplification of the spiral conveying mode is difficult, the material is easy to frame by adopting the dead weight blanking mode, the materials are difficult to be conveyed orderly, the materials are too loose in the general rotary drum conveying process, the heat transfer is not facilitated, the heat exchange efficiency of the caterpillar band conveying system is high, and the sealing difficulty of the system is high.
Disclosure of Invention
In order to solve the problems of difficult orderly conveying of materials, low heat transfer efficiency of the system and the like of the existing biomass carbonization system, the invention discloses a combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system, which integrates the advantages of different conveying modes, and achieves the purposes of efficient heat exchange, segmented pyrolysis and orderly conveying of materials through continuous cascade pyrolysis.
The system proposal adopted by the invention for achieving the purpose is as follows: the combined heating type biomass continuous cascade pyrolysis carbon gas co-production system consists of a feeding device, a combined heating type biomass continuous cascade pyrolysis device, a pyrolysis gas secondary condensation separation device, a high-voltage electrostatic decoking and dust removal device, a pyrolysis gas oil washing device, a gas storage device, an oil storage tank and a cooling carbon discharging device. The continuous cascade pyrolysis device is characterized in that the front end of the continuous cascade pyrolysis device is provided with a feeding device, the rear end of the continuous cascade pyrolysis device is connected in series by a pyrolysis gas secondary condensation separation device, a high-voltage electrostatic decoking and dust removal device, a pyrolysis gas oil washing device and a gas storage device in sequence and is used for purifying and separating and storing pyrolysis gas, the pyrolysis gas oil washing device adopts a spray type oil washing mode, and a refrigerant generally adopts kerosene. The cooling carbon outlet device is arranged below the side of the combined heating biomass continuous cascade pyrolysis device, and generally adopts a partition wall type circulating water cooling mode to cool the biochar.
The combined heating type biomass continuous cascade pyrolysis carbon gas co-production system is characterized in that the combined heating type biomass continuous cascade pyrolysis device consists of a sealing feeding device, a pyrolysis gas outlet, an explosion-proof device, a flue gas outlet, an insulating layer, a hot flue cavity, an outer rotary cylinder, an inner rotary cylinder, a radiation guide plate, a bracket, a combustor, an insulating carbonization device and a transmission device, wherein the sealing feeding device is arranged at the forefront end of equipment and is connected with the inner rotary cylinder, a spiral conveying and locking mechanism is generally adopted for combining feeding, and the rotating speed of a spiral feeding mechanism of the sealing feeding device is adjustable.
The heat-insulating layer, the hot smoke cavity, the outer rotary cylinder and the inner rotary cylinder of the combined heating type biomass continuous cascade pyrolysis carbon gas co-production system are coaxially arranged, the heat-insulating layer is arranged on the outer side of the hot smoke cavity, high-temperature-resistant heat-insulating materials such as rock wool and hard polyurethane plates are generally adopted for heat preservation of the pyrolysis system, the outer rotary cylinder is fixedly connected with the inner rotary cylinder, the steering is the same, and the theoretical material conveying capacity of the outer rotary cylinder is generally 1.1-1.3 times that of the inner rotary cylinder and is used for preventing material blockage in the working process.
The combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system is characterized in that an inner rotary drum of the combined heating type biomass continuous cascade pyrolysis device can generally adopt double-line or multi-line breaking spiral guide plates or inclined lifting plates for turning and drying materials, an outer rotary drum can generally adopt a continuous spiral guide mechanism, high-efficiency heat exchange and pyrolysis are achieved, the directions of the guide mechanisms of the outer rotary drum and the inner rotary drum are opposite, and material baffling and reverse conveying can be achieved. The inner rotary cylinder is mainly used for drying materials, the outer rotary cylinder is mainly used for pyrolysis of the materials, and the adaptability of the equipment to the water content of the materials is improved.
The combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system is characterized in that a pyrolysis gas outlet of a combined heating type biomass continuous cascade pyrolysis device is opened from the front end of an inner rotary drum, generally 3-5 ports are opened along the circumferential direction, the pyrolysis gas is guided out through the fixed supporting end of an outer rotary drum, and an explosion-proof device is a U-shaped water seal mechanism and is fixedly supported and connected with the outer rotary drum and used for emergency pressure relief of the system. When the pressure of the reaction chamber rises suddenly, the pressure exhaust of the water column of the U-shaped water seal mechanism is overcome, and emergency pressure relief can be realized.
The combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system is characterized in that a burner of a combined heating type biomass continuous cascade pyrolysis device is connected with a hot smoke cavity, a radiation guide plate is arranged at the joint to prevent the hot smoke from ablating an outer rotary drum at a local high temperature, the radiation guide plate is made of silicon carbide materials, a heat preservation carbonization device is connected with the tail end of the outer rotary drum and is used for further curing of biochar, the heat preservation carbonization device is generally vertically installed to reduce the arching and material erecting risk of the biochar, and the retention time of materials in a heat preservation carbonization area is generally controlled to be more than 30 min.
The combined heating type biomass continuous cascade pyrolytic carbon gas co-production system is characterized in that a pyrolytic gas secondary condensation separation device is connected with a pyrolytic gas outlet, a dividing wall type water cooling and air cooling technology is generally adopted, the condensation temperature is adjustable, the first-stage condensation temperature is generally 110-150 ℃, the second-stage condensation temperature is generally 80-90 ℃, an oil storage tank is connected under the pyrolytic gas secondary condensation separation device, the oil storage tank is connected with a combustor through a heat preservation pipeline, and the external rotary drum is heated through pyrolysis oil backflow combustion. If pyrolysis oil can not meet the pyrolysis requirement of the system, the gas in the gas storage device can be used for supplementing.
The invention has the following advantages or positive effects.
(1) The combined heating type biomass continuous cascade pyrolysis device adopts two inner and outer embedded parts to convey materials in opposite spiral directions, a shoveling plate is arranged inside the inner rotary cylinder, and spirals are arranged inside the outer rotary cylinder and are respectively used for effectively drying and rapidly pyrolyzing the materials, so that biomass pyrolysis cascade continuous production can be realized.
(2) The pyrolysis oil is directly combusted and heated, so that the dependence on other energy sources in the production process is effectively reduced, a minimum production system for biomass pyrolysis is formed, the technical practicability is improved, the problem of insufficient market of the application of the rear end of the pyrolysis oil at present can be solved, and secondary pollution of tar to the environment is avoided.
(4) The explosion-proof device adopts the U-shaped water seal mechanism, can effectively avoid the explosion risk caused by sudden pressure rise of the reaction chamber, and has the advantages of safety, convenience, economy and practicability.
Drawings
Fig. 1 is a schematic diagram of a combined heating biomass continuous cascade pyrolysis carbon gas co-production system.
Fig. 2 is a schematic diagram of the main structure of the combined heating biomass continuous cascade pyrolysis device.
In fig. 1: the biomass continuous cascade pyrolysis device comprises a feeding device 1, a combined heating type biomass continuous cascade pyrolysis device 2, a pyrolysis gas secondary condensation separation device 3, a high-voltage electrostatic decoking and dust removing device 4, a pyrolysis gas oil washing device 5, a gas storage device 6, an oil storage tank 7 and a cooling carbon discharging device 8.
In fig. 2: 201 is a sealed feeding device, 202 is a pyrolysis gas outlet, 203 is an explosion-proof device, 204 is a flue gas outlet, 205 is an insulating layer, 206 is a hot flue gas cavity, 207 is an outer rotary cylinder, 208 is an inner rotary cylinder, 209 is a radiation guide plate, 210 is a bracket, 211 is a burner, 212 is an insulating carbonization device, and 213 is a transmission device.
Detailed Description
The embodiment is a combined heating type biomass continuous cascade pyrolysis charcoal gas co-production pilot scale system, and the following description is made on the embodiment of the invention with reference to the accompanying drawings: the production system consists of a feeding device (1), a combined heating type biomass continuous cascade pyrolysis device (2), a pyrolysis gas secondary condensation separation device (3), a high-voltage electrostatic decoking dust removal device (4), a pyrolysis gas oil washing device (5), a gas storage device (6), an oil storage tank (7), a cooling carbon discharging device (8) and the like, wherein the front end of the combined heating type biomass continuous cascade pyrolysis device (2) is the feeding device (1), the rear end of the combined heating type biomass continuous cascade pyrolysis device is sequentially connected in series by the pyrolysis gas secondary condensation separation device (3), the high-voltage electrostatic decoking dust removal device (4), the pyrolysis gas oil washing device (5) and the gas storage device (6) for purifying separation and storage of pyrolysis gas, the pyrolysis gas oil washing device (5) adopts a spray type oil washing mode, a cooling carbon discharging device (8) is arranged below the side of the combined heating type biomass continuous pyrolysis device (2), and a partition wall type circulating water cooling system is adopted by the cooling carbon discharging device (8). The combined heating type biomass continuous cascade pyrolysis device (2) consists of a sealing feeding device (201), a pyrolysis gas outlet (202), an explosion-proof device (203), a flue gas outlet (204), a heat preservation layer (205), a hot flue gas cavity (206), an outer rotary cylinder (207), an inner rotary cylinder (208), a radiation guide plate (209), a bracket (210), a burner (211), a heat preservation carbonization device (212) and a transmission device (213), wherein the sealing feeding device (201) is arranged at the forefront end of equipment, is connected with the inner rotary cylinder (208), and adopts a spiral conveying and locking mechanism to combine the materials. The heat preservation layer (205), the hot smoke cavity (206), the outer rotary cylinder (207) and the inner rotary cylinder (208) of the combined heating type biomass continuous cascade pyrolysis device (2) are coaxially arranged, the heat preservation layer (205) is arranged on the outer side of the hot smoke cavity (206), a hard polyurethane plate is used as a heat preservation material, the outer rotary cylinder (207) and the inner rotary cylinder (208) are fixedly connected, the steering direction is the same, and the theoretical material conveying capacity of the outer rotary cylinder (208) is 1.2 times that of the inner rotary cylinder (207). The inner rotary drum (208) of the combined heating type biomass continuous cascade pyrolysis device (2) adopts a double-wire breaking spiral guide plate for turning and drying materials, the outer rotary drum (207) adopts a continuous spiral guide mechanism, high-efficiency heat exchange and pyrolysis are realized, and the directions of the guide mechanisms of the outer rotary drum (207) and the inner rotary drum (208) are opposite, so that material baffling and reverse conveying are realized. The pyrolysis gas outlet (202) of the combined heating type biomass continuous cascade pyrolysis device (2) is opened from the front end of the inner rotary drum (208), 3 openings are opened along the circumferential direction of the inner rotary drum (208), the pyrolysis gas is guided out through the fixed supporting end of the outer rotary drum (207), and the explosion-proof device (203) is a U-shaped water seal mechanism and is fixedly supported and connected with the outer rotary drum (207) for emergency pressure relief of the system. The burner (211) of the combined heating type biomass continuous cascade pyrolysis device (2) is connected with the hot smoke cavity (206), a radiation guide plate (209) is arranged at the joint, the hot smoke is prevented from being ablated by the outer rotary drum (207) at a local high temperature, the heat preservation carbonization device (212) is connected with the tail end of the outer rotary drum (207), the designed retention time of materials in the heat preservation carbonization device (212) is 30-60 min, and the biomass continuous cascade pyrolysis device is used for further curing biochar.
The pyrolysis gas secondary condensation separation device (3) is connected with the pyrolysis gas outlet (202), a dividing wall type water cooling and air cooling combined condensation technology is adopted, the condensation temperature is adjustable, the condensation temperature of the first-stage design is 150 ℃, the condensation temperature of the second-stage design is 90 ℃, an oil storage tank (7) is connected under the pyrolysis gas secondary condensation separation device (3), the oil storage tank (7) is connected with a combustor (211) through a heat preservation pipeline, and the outer rotary drum (207) is heated through pyrolysis oil backflow combustion. The high-voltage electrostatic decoking and dust removing device (4) is arranged at the rear side of the pyrolysis gas secondary condensation and separation device (3), and the working voltage is 55kV and is used for further decoking and dust removing of the pyrolysis gas.
The pilot system performance test results show that: the production system realizes the step pyrolysis and orderly conveying of materials, can be used for pyrolyzing raw materials with the water content not exceeding 20%, and the pyrolysis oil and part of pyrolysis gas can be recycled and combusted to meet the heating requirement of the system, the calorific value of the purified pyrolysis gas can reach more than 12MJ/Nm3, the biochar yield reaches more than 25%, and the indexes such as the fixed carbon content, the calorific value and the like of the biochar reach the expected targets.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (7)
1. The combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system consists of a feeding device (1), a combined heating type biomass continuous cascade pyrolysis device (2), a pyrolysis gas secondary condensation separation device (3), a high-voltage electrostatic decoking and dust removal device (4), a pyrolysis gas oil washing device (5), a gas storage device (6), an oil storage tank (7) and a cooling charcoal outlet device (8), and is characterized in that the front end of the combined heating type biomass continuous cascade pyrolysis device (2) is provided with the feeding device (1), and the rear end of the combined heating type biomass continuous cascade pyrolysis device is sequentially connected in series with the pyrolysis gas secondary condensation separation device (3), the high-voltage electrostatic decoking and dust removal device (4), the pyrolysis gas oil washing device (5) and the gas storage device (6) for purifying separation and storage of pyrolysis gas, and the cooling charcoal outlet device (8) is arranged below the side of the combined heating type biomass continuous cascade pyrolysis device (2);
the combined heating type biomass continuous cascade pyrolysis device (2) consists of a sealing feeding device (201), a pyrolysis gas outlet (202), an explosion-proof device (203), a flue gas outlet (204), a heat preservation layer (205), a hot flue gas cavity (206), an outer rotary cylinder (207), an inner rotary cylinder (208), a radiation guide plate (209), a bracket (210), a combustor (211), a heat preservation carbonization device (212) and a transmission device (213), wherein the inner rotary cylinder (208) adopts a double-wire breaking spiral guide plate for turning and drying materials, the outer rotary cylinder (207) adopts a continuous spiral guide mechanism to realize efficient heat exchange and pyrolysis, and the guide mechanisms of the outer rotary cylinder (207) and the inner rotary cylinder (208) are opposite in rotation direction, so that the material can be reversely conveyed in a baffling manner;
an oil storage tank (7) is connected under the pyrolysis gas secondary condensation separation device (3), the oil storage tank (7) is connected with a combustor (211) through a heat preservation pipeline, and the outer rotary drum (207) is heated through pyrolysis oil backflow combustion.
2. The combined heating biomass continuous cascade pyrolysis charcoal gas co-production system according to claim 1 is characterized in that a sealing feeding device (201) is arranged at the forefront end of the equipment and is connected with an inner rotary drum (208), and feeding is generally combined by adopting a spiral conveying and locking mechanism.
3. A combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system according to claim 1 or 2, is characterized in that an insulating layer (205), a hot smoke cavity (206), an outer rotary cylinder (207) and an inner rotary cylinder (208) of the combined heating type biomass continuous cascade pyrolysis device (2) are coaxially arranged, the heat preservation layer (205) is arranged on the outer side of the hot smoke cavity (206), and is made of high-temperature resistant heat preservation materials such as rock wool and hard polyurethane plates, the outer rotary cylinder (207) is fixedly connected with the inner rotary cylinder (208), the steering direction is the same, and the theoretical material conveying capacity of the outer rotary cylinder (208) is generally 1.1-1.3 times that of the inner rotary cylinder (207).
4. The combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system according to claim 1 or 2 is characterized in that an inner rotary drum (208) of the combined heating type biomass continuous cascade pyrolysis device (2) can generally adopt double-line or multi-line breaking spiral material guide plates or inclined material lifting plates for turning and drying materials, and an outer rotary drum (207) can generally adopt a continuous spiral material guide mechanism to realize efficient heat exchange and pyrolysis.
5. The combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system according to claim 1 or 2, wherein a pyrolysis gas outlet (202) of the combined heating type biomass continuous cascade pyrolysis device (2) is opened from the front end of an inner rotary drum (208), generally opened with 3-5 ports along the circumferential direction, is led out through a fixed supporting end of an outer rotary drum (207), and an explosion-proof device (203) is a U-shaped water seal mechanism and is connected with the fixed supporting end of the outer rotary drum (207) for emergency pressure relief of the system.
6. The combined heating type biomass continuous cascade pyrolysis charcoal gas co-production system according to claim 1 or 2, wherein a burner (211) of the combined heating type biomass continuous cascade pyrolysis device (2) is connected with a hot smoke cavity (206), a radiation guide plate (209) is arranged at the joint to prevent the hot smoke from being ablated by the outer rotary drum (207) at a local high temperature, and a heat preservation carbonization device (212) is connected with the tail end of the outer rotary drum (207) for further curing of biochar.
7. The combined heating type biomass continuous cascade pyrolysis carbon gas co-production system according to claim 1 or 2, wherein the pyrolysis gas secondary condensation separation device (3) is connected with the pyrolysis gas outlet (202), generally adopts a dividing wall type water cooling and air cooling technology, the condensation temperature is adjustable, the first stage condensation temperature is generally 110-150 ℃, and the second stage condensation temperature is generally 80-90 ℃.
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| CN110093189A (en) * | 2019-05-14 | 2019-08-06 | 阔阳（湖北）环保节能科技有限公司 | More return-stroke biomass solid gas crack purification furnace |
| CN110079370A (en) * | 2019-05-14 | 2019-08-02 | 阔阳（湖北）环保节能科技有限公司 | A kind of preparation process of more return-stroke biomass cracking carbonization shaped fuels |
| CN110079343A (en) * | 2019-05-14 | 2019-08-02 | 阔阳（湖北）环保节能科技有限公司 | The more return-stroke biomass solid gas of highly effective and safe crack purification furnace |
| CN113999063A (en) * | 2021-12-30 | 2022-02-01 | 邢台永恒能源管理有限公司 | Method for producing carbon-based organic fertilizer by using livestock and poultry manure |
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| GB2619256A (en) | 2022-02-25 | 2023-12-06 | Plastic Energy Ltd | A method for the storage or transport of pyrolysis oil |
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