CN105838460A - Coal pyrolysis and cracking gas production combined gas power generation system - Google Patents

Coal pyrolysis and cracking gas production combined gas power generation system Download PDF

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Publication number
CN105838460A
CN105838460A CN201610332315.5A CN201610332315A CN105838460A CN 105838460 A CN105838460 A CN 105838460A CN 201610332315 A CN201610332315 A CN 201610332315A CN 105838460 A CN105838460 A CN 105838460A
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CN
China
Prior art keywords
gas
cracking
pyrolysis
reactor
radiant tube
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CN201610332315.5A
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Chinese (zh)
Inventor
耿层层
陈水渺
肖磊
薛逊
吴道洪
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Beijing Shenwu Environmental and Energy Technology Co Ltd
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Beijing Shenwu Environmental and Energy Technology Co Ltd
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Priority to CN201610332315.5A priority Critical patent/CN105838460A/en
Publication of CN105838460A publication Critical patent/CN105838460A/en
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/02Combustion or pyrolysis

Abstract

The invention provides a coal pyrolysis and cracking gas production combined gas power generation system, which comprises a pyrolysis hopper, a first feeding device, a pyrolysis and cracking reactor, a spraying tower, a gas tank and a generator set, wherein the pyrolysis and cracking reactor comprises a heat insulation brick wall and a communicating component; the internal space of the reactor is divided into a pyrolysis chamber and a cracking chamber by the heat insulation brick wall; the communicating component is arranged at the lower part of the heat insulation brick wall; the spraying tower is connected with a cracking gas outlet; the gas tank is connected with the spraying tower; the generator set is connected with the gas tank. The reactor of the power generation system is divided into the pyrolysis chamber and the cracking chamber, and oil gas generated by the pyrolysis chamber can enter the cracking chamber for deep cracking, so that the problem that produced pyrolitic oil contains dust is solved, and clean and efficient utilization of coal is really implemented. Two kinds of operation can be integrally executed in one furnace body, so that construction cost is reduced, and the occupied area is saved; a small part of pyrolysis gas is supplied to a radiator tube for combustion, and the rest gas enters the gas generator set to be combusted for power generation.

Description

A kind of pyrolysis of coal and cracking aerogenesis associating gas power generation system
Technical field
The invention belongs to pyrolysis and the cracking aerogenesis and fuel gas buring technical field of power generation of coal, be specifically related to a kind of based on heat accumulation type radiant tube heated particle pyrolysis of coal and cracking system to produce combustible gas combined generating system.
Background technology
Rich coal resources in China, raw coal is except part is in addition to coking, converting processing, and the overwhelming majority is for directly burning.Coal directly burns, cause in coal rich in petroleum resources the most sufficiently refined utilization, and directly combustion thermal efficiency is low, serious to environmental disruption.The pyrolysis of coal is to be heated under an inert atmosphere by coal, produces the products such as semicoke, coal gas and tar, and these products obtained again can be with cascade utilization, while fully extracting petroleum resources, improves again the comprehensive utilization ratio of coal.Pyrolytic process of coal can be divided into external-heat and internal heat type two class.External heating type heat efficiency is low, and volatility product twice decomposition is serious;Internal heat type technique overcomes the shortcoming of external-heat, transfers heat to coal by heat carrier (solid thermal carriers and gas heat carrier)., there is carbonization gas and rushed dilute in gas heat carrier technique, condensate recovery system is huge, and gas heating value is low, it is difficult to the shortcoming of comprehensive utilization further.Solid thermal carriers technique has certain advantage comparatively speaking, but it is too many to there is complex process operation link, the shortcomings such as manufacturing cost is high.The existing pyrolysis type of furnace is all to produce oil product as main purpose, but is mostly pyrolyzed the type of furnace, especially to process the fine coal type of furnace as raw material, containing a large amount of dirt in pyrolysis oil, causes pyrolysis oil to be difficult to effectively and utilizes, and pyrolysis oil is worth the problems such as the highest.Therefore, how to design all simple pyrolysis of coal of a kind of high-effective dust-removing, system architecture and technological process and cracking aerogenesis associating gas power generation system becomes the problem that this area needs solution badly.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, design and develop a kind of pyrolysis and cracking aerogenesis associating gas power generation system, this system can carry out being pyrolyzed and crack two kinds of operations, the oil gas that pyrolysis chamber produces, can enter cracking room and carry out deep pyrolytic, the tar molecules of big molecule is cracked into the gaseous hydrocarbons of little molecule, this reactor can produce substantial amounts of cracking gas, thus avoiding the problem producing pyrolysis oil dust-laden, the clean and effective being truly realized coal utilizes.System that employs heat accumulation type radiant tube heating technique to heat without gas, solid heat carrier, simplify system process while improve the thermal efficiency of reactor, the supply radiant tube burning of cracking gas small part, residue combustion gas enters jet dynamic control, combustion power generation.
For solving above-mentioned technical problem, the technical solution used in the present invention is: the invention provides a kind of pyrolysis and cracking aerogenesis associating gas power generation system.According to embodiments of the invention, this system includes: pyrolysis hopper;First feed arrangement, described first feed arrangement is connected with described pyrolysis hopper;Pyrolysis and cracking reactor, including: charging aperture, pyrolysis chamber, cracking room and cracking gas outlet, described charging aperture is arranged on the roof of described pyrolysis chamber, the outlet of described cracking gas is arranged on the sidewall of described cracking room, and: heat accumulation type radiant tube, described heat accumulation type radiant tube is along the short transverse multi-tier arrangement of described reactor inside described pyrolysis chamber and described cracking room, and every layer has the many described heat accumulation type radiant tubes arranged in the horizontal direction;Heat insulation brick wall, described heat insulation brick wall is arranged at the 2/3 of described reactor transverse width, vertically through in described reactor, the inner space of described reactor is separated into described pyrolysis chamber and described cracking room;Communication member, described communication member is arranged on the bottom of described heat insulation brick wall, for the oil gas produced described pyrolysis chamber, by described communication member, is passed into described cracking room;Spray column, described spray column is connected with the outlet of described cracking gas;Fuel cartridge, described fuel cartridge is connected with described spray column;Generating set, described generating set is connected with described fuel cartridge.
Inventor finds, power generation system structure according to embodiments of the present invention is simple, and easy to operate, uniformity of temperature profile, heating effect is good.Reactor is divided into pyrolysis chamber and cracking room, the oil gas that pyrolysis chamber produces, cracking room can be entered and carry out deep pyrolytic, the tar molecules of big molecule is cracked into the gaseous hydrocarbons of little molecule, this reactor can produce substantial amounts of cracking gas, thus avoiding the problem producing pyrolysis oil dust-laden, the clean and effective being truly realized coal utilizes.In addition, two kinds of operations can be carried out in one body of heater, unite two into one, save construction cost and floor space, and, system that employs heat accumulation type radiant tube heating technique without gas, solid heat carrier heating, system process is simplified while improve the thermal efficiency of reactor, the supply radiant tube burning of cracking gas small part, residue combustion gas enters jet dynamic control, combustion power generation.
According to embodiments of the invention, described communication member is the pore area including multiple hole being arranged on described heat insulation brick wall;Or described communication member is on described heat insulation brick wall longitudinal length, is positioned at the opening of lower position.
According to embodiments of the invention, the thickness of described heat insulation brick wall is 5-15cm, and the height of described pore area is 3-15cm, a diameter of 1-3cm in described hole, and the height of described opening is 3-15cm.
According to embodiments of the invention, farther including combustion gas pressure fan, wherein, one end of described combustion gas pressure fan is connected with the outlet of described fuel cartridge, and the other end is connected with the fuel gas inlet of described heat accumulation type radiant tube.
According to embodiments of the invention, farther including combustion gas air-introduced machine, described combustion gas air-introduced machine is arranged between described spray column and described fuel cartridge.
According to embodiments of the invention, also include loading hopper;Second feed arrangement, it is connected with described loading hopper;Drying device, it is connected with the exhanst gas outlet on described second feed arrangement and described heat accumulation type radiant tube respectively;Gas-solid separating device, it is connected with described drying device and described pyrolysis hopper respectively;Exhaust gas cleaner, it is connected with described gas-solid separating device.
According to embodiments of the invention, described pyrolysis hopper is connected with described charging aperture by described first feed arrangement;Farther including semicoke outlet, the outlet of described semicoke is arranged on the bottom of described pyrolysis chamber, and the outlet of described semicoke is connected with described semicoke conveying device.
In another aspect of the present invention, the invention provides a kind of method utilizing foregoing system to carry out being pyrolyzed and crack aerogenesis associating fuel gas generation, it is characterized in that, comprise the following steps: granule materials is joined in reactor by charging aperture by a., in the pyrolysis chamber of described reactor, complete pyrolytic process;B. it is pyrolyzed the oil gas of generation, by the communication member arranged on the heat insulation brick wall of described reactor, enters into the cracking room of described reactor;C. the oil gas being pyrolyzed generation completes thermal cracking processes in described cracking room, produces cracking gas;The most described cracking gas enters in spray column by cracking gas outlet, and described cracking gas is carried out purified treatment;The most purified clean cracking gas sends into fuel cartridge through combustion gas air-introduced machine, and the gas part in described fuel cartridge sends into the fuel gas inlet of heat accumulation type radiant tube through combustion gas pressure fan, and another part is sent into generating set, carried out combustion power generation.
According to embodiments of the invention, in described step a, the described granule materials charging aperture from described reactor top joins described reactor, and is broken up by the described heat accumulation type radiant tube in described reactor, and pyrolysis char exports from the semicoke of described reactor bottom and discharges;In described step a, described granule materials is heated to 500-600 DEG C by the described heat accumulation type radiant tube in described reactor pyrolysis chamber, and in described step b, described pyrolysis oil gas is heated to 650-900 DEG C by the described heat accumulation type radiant tube in described reactor cracking room.
According to embodiments of the invention, the granularity of described granule materials is below 10mm.
The beneficial effects of the present invention is:
1) taking heat accumulation type radiant tube moving bed process heating 10mm particles below and powder coal, uniformity of temperature profile, heating effect is good, and reaction system simple in construction is easy to operate.
2) reactor is divided into pyrolysis chamber and cracking room, the oil gas that pyrolysis chamber produces, deep pyrolytic can be carried out at cracking room, the tar molecules of big molecule is cracked into the gaseous hydrocarbons of little molecule, this reactor can produce substantial amounts of cracking gas product, the problem avoiding pyrolysis oil dust-laden, the clean and effective being truly realized fossil fuel utilizes.
3) two kinds of operations can be carried out in a body of heater, unite two into one, save construction cost and floor space.
4) cracking gas small part supply radiant tube burning, residue combustion gas enters jet dynamic control, combustion power generation.
Accompanying drawing explanation
Fig. 1 is pyrolysis of coal of the present invention and cracking aerogenesis associating gas power generation system structure chart.
Fig. 2 is pyrolysis of coal of the present invention and the structure of reactor figure of cracking aerogenesis associating gas power generation system.
Fig. 3 is the front view of the heat insulation brick wall in reactor of the present invention.
Wherein, 1. loading hopper;2. riser drier;The most thermal storage type moving bed reactor;310, cracking gas outlet;311, exhanst gas outlet;320, charging aperture;321, air intake;322, fuel gas inlet;330, semicoke outlet;340, cracking room;350, pyrolysis chamber;360, communication member;370, heat insulation brick wall;380, heat accumulation type radiant tube;4. it is dried cyclone separator;5. pyrolysis hopper;6. tail gas air-introduced machine;7. exhaust gas cleaner;8. chimney;9. rotary feeder;10. spray column;11. combustion gas air-introduced machines;12. fuel cartridges;13. combustion gas pressure fan;14. conveying worms;15. jet dynamic control.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that technical scheme, below in conjunction with specific embodiment, the present invention is described in further detail.The embodiments described below is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.In embodiment, unreceipted concrete technology or condition, according to the technology described by the document in this area or condition or carried out according to product description.
According to an aspect of the present invention, the invention provides a kind of pyrolysis of coal and cracking aerogenesis associating gas power generation system, Fig. 1 is this pyrolysis of coal and the structure chart of cracking aerogenesis associating gas power generation system, as it is shown in figure 1, pyrolysis of coal and cracking aerogenesis associating gas power generation system include: pyrolysis hopper 5;First feed arrangement 9, described first feed arrangement 9 is connected with described pyrolysis hopper 5;Pyrolysis and cracking reactor 3, including: charging aperture 320, pyrolysis chamber 350, cracking room 340, cracking gas outlet 310, heat accumulation type radiant tube 380, heat insulation brick wall 370 and communication member 360, wherein, described charging aperture is arranged on the roof of described pyrolysis chamber, the outlet of described cracking gas is arranged on the sidewall of described cracking room, described heat insulation brick wall is vertically through in reactor, the inner space of reactor is separated into pyrolysis chamber and cracking room, described communication member is arranged on described heat insulation brick wall, pyrolysis chamber is connected with cracking room, preferably, described communication member is arranged on the bottom of heat insulation brick wall, the oil gas that pyrolysis chamber is produced, pass through communication member, it is passed into cracking room;Spray column 10, described spray column is connected with the outlet of described cracking gas;Fuel cartridge 12, described fuel cartridge is connected with described spray column;Generating set 15, described generating set is connected with described fuel cartridge.
Inventor finds, power generation system structure according to embodiments of the present invention is simple, and easy to operate, uniformity of temperature profile, heating effect is good.Reactor is divided into pyrolysis chamber and cracking room, the oil gas that pyrolysis chamber produces, cracking room can be entered and carry out deep pyrolytic, the tar molecules of big molecule is cracked into the gaseous hydrocarbons of little molecule, this reactor can produce substantial amounts of cracking gas, thus avoiding the problem producing pyrolysis oil dust-laden, the clean and effective being truly realized coal utilizes.In addition, two kinds of operations can be carried out in one body of heater, unite two into one, save construction cost and floor space, and, system that employs heat accumulation type radiant tube heating technique without gas, solid heat carrier heating, system process is simplified while improve the thermal efficiency of reactor, the supply radiant tube burning of cracking gas small part, residue combustion gas enters jet dynamic control, combustion power generation.
According to a particular embodiment of the invention, the concrete kind and the particle diameter that are applicable to the pyrolysis material that this electricity generation system processes are not particularly limited, according to embodiments of the invention, pyrolysis material can be oil shale, the fossil fuels such as coal, can also be rubbish, mud, junked tire etc., pyrolysis material can be that block pyrolysis material can also be for little particle pyrolysis material, in a preferred embodiment of the invention, this electricity generation system uses particle diameter 10mm particles below coal, thus, little particle pyrolysis material can be made full use of, resource utilization is high, and can solve the problem that the problem that bulk deposition pollutes environment.
According to a particular embodiment of the invention, the type of furnace of the described reactor 3 being applicable to this electricity generation system is not particularly limited, can be thermal storage type moving bed pyrolysis and cracking reactor 3 can also be other type, such as non-heat accumulating type or non-moving type etc., as long as pyrolysis chamber and cracking room can be divided into by the integration of heat insulation brick wall.
According to a particular embodiment of the invention, Fig. 2 is pyrolysis and cracking reactor 3 structure chart that this pyrolysis of coal and cracking aerogenesis combine gas power generation system, as shown in Figure 2, described heat insulation brick wall is arranged in reactor, preferably, it is positioned at the 2/3 of reactor transverse width, the thickness of heat insulation brick wall is 5-15cm, heat insulation brick wall is vertically through in reactor, the inner space of reactor is separated into pyrolysis chamber and cracking room, this structure makes to be provided with pyrolysis chamber and cracking room in a body of heater, the oil gas that pyrolysis chamber produces, cracking room can be entered and carry out deep pyrolytic, the tar molecules of big molecule is cracked into the gaseous hydrocarbons of little molecule, produce substantial amounts of cracking gas, thus avoid the problem producing pyrolysis oil dust-laden.Further, two kinds of operations can be carried out in a body of heater, unite two into one, save construction cost and floor space.
According to a particular embodiment of the invention, the concrete kind of described communication member 360 is not particularly limited, as long as can be connected with cracking room pyrolysis chamber, thus the oil gas that pyrolysis chamber produces is passed into cracking room.In some embodiments of the invention, when Fig. 3 is in terms of the from left to right of reactor, the front view of heat insulation brick wall, as it is shown on figure 3, communication member can be the pore area including multiple hole being arranged on heat insulation brick wall, under preferable case, the height of described pore area is 3-15cm, a diameter of 1-3cm in described hole.Communication member can also be on heat insulation brick wall longitudinal length, is positioned at the opening of lower position, and under preferable case, the height of described opening is 3-15cm.
According to a particular embodiment of the invention, as it is shown in figure 1, described charging aperture is arranged on the roof on top, pyrolysis chamber, pyrolysis hopper is connected with described charging aperture by the first feed arrangement;The concrete kind of the first feed arrangement is not particularly limited, as long as can be effectively delivered in reactor by the pyrolysis material in pyrolysis hopper.In some embodiments of the invention, the first feed arrangement 9 can be rotary feeder or conveying worm.Thereby, it is possible to realize the Automatic Conveying to pyrolysis material, conveying capacity is controlled, and device structure is simple, easy to operate.
According to a particular embodiment of the invention, as it is shown in figure 1, described reactor further comprises semicoke outlet 330, the outlet of described semicoke is arranged on the bottom of described pyrolysis chamber, and the outlet of described semicoke is connected with described semicoke conveying device 14.Thus, it is possible to utilize semicoke conveying device to be carried by the semicoke obtained in reactor.The concrete kind of semicoke conveying device 14 is not particularly limited, and includes but not limited to star or conveying worm.Thereby, it is possible to realize the Automatic Conveying to semicoke, and conveying capacity is controlled, and device structure is simple, easy to operate.
According to a particular embodiment of the invention, as shown in Figure 2, described inside reactor has multilayer to be arranged in the heat accumulation type radiant tube within described pyrolysis chamber and described cracking room along the short transverse of described reactor, and every layer of heat accumulation type radiant tube can include the heat accumulation type radiant tube of multiple parallel to each other and horizontally spaced distribution.According to embodiments of the invention, in described pyrolysis chamber and cracking room, distributed at least described heat accumulation type radiant tube respectively, it is preferred that described at least heat accumulation type radiant tube is uniformly distributed.Heat accumulation type radiant tube can be effective to heat the oil gas in pyrolysis material and cracking room so that it is carries out being pyrolyzed and cracking reaction, specifically, can be passed through combustible gas and air in heat accumulation type radiant tube, makes combustible gas burning realize the heating function to pyrolysis material.This equipment uses heat accumulation type radiant tube heating technique, without gas, solid heat carrier heating, pyrolysis gas will not be diluted, and calorific value is high, and reactor temperature is evenly distributed, surface temperature difference is little, exhaust gas temperature is low, and the thermal efficiency is high, simplifies system process while improve the thermal efficiency of reactor, reaction system simple in construction, easy to operate.
In described reactor, pyrolysis material moves from top to bottom, and pyrolysis material can be broken up and make it be uniformly distributed by the heat accumulation type radiant tube arranged in described reactor, and pyrolysis material stops 1-50 minute the most from top to bottom, and is heated to 500-600 DEG C.According to embodiments of the invention, the shape of heat accumulation type radiant tube is not particularly limited, and in some embodiments of the invention, can be cylindrical, is thus conducive to breaing up of pyrolysis material, it is achieved mixed pyrolysis material in the reactor dispersed.The level interval of radiant tube is 200-500mm, and vertical interval is 200-700mm, and the radiant tube number of plies is 10-25 layer, and reactor width is 2-6m, and height for reactor is 3-20m.Additionally, heat accumulation type radiant tube can be the unidirectional heat accumulation type radiant tube being evenly arranged, the temperature of tube wall can control 450-1000 DEG C of scope by gas control valve, heat accumulation type radiant tube can take the combustion system periodically commutated, the surface temperature difference making single heat accumulation type radiant tube only has about 30 DEG C, do not have district of localized hyperthermia, thus, to be conducive to improving the thermal efficiency.
According to a particular embodiment of the invention, described reactor is provided with fuel gas inlet 322, air intake 321 and exhanst gas outlet 311, wherein, fuel gas inlet and exhanst gas outlet are connected with heat accumulation type radiant tube respectively, it is respectively used to be passed through combustible gas and discharge flue gas, air intake is connected with source of the gas and heat accumulation type radiant tube respectively, for being passed through in heat accumulation type radiant tube by the air that source of the gas produces.
According to embodiments of the invention, as it is shown in figure 1, this synthesis gas system may further include: loading hopper 1;The second feed arrangement being connected with loading hopper;The drying device 2 being connected with the exhanst gas outlet 311 of the second feed arrangement and heat accumulation type radiant tube respectively;The gas-solid separating device 4 being connected with drying device and pyrolysis hopper 5 respectively;The exhaust gas cleaner 7 being connected with gas-solid separating device.Thus, pyrolysis material in loading hopper can be added in drying device by the second feed arrangement, in drying device, pyrolysis material is dried under the effect from the flue gas (temperature is about 150-250 DEG C) of heat accumulation type radiant tube, the mixture of the most dried pyrolysis material and flue gas enters gas-solid separating device, separate in flue gas (temperature is about 70-130 DEG C) the entrance exhaust gas cleaner obtained and carry out purified treatment, to realize qualified discharge, separate the pyrolysis material obtained to be delivered to be pyrolyzed in hopper, be used for carrying out pyrolytic reaction.
According to embodiments of the invention, the concrete kind of the second pay-off is not particularly limited, as long as being delivered in drying device be applicable to by the pyrolysis material loading hopper.In some embodiments of the invention, the second pay-off can be star feeder or feed screw.Thereby, it is possible to realize the Automatic Conveying to pyrolysis material, and conveying capacity is controlled, and device structure is simple, easy to operate.
According to embodiments of the invention, the concrete kind of drying device 2 is not particularly limited, as long as being capable of the function that pyrolysis material is dried and is preheated.In some embodiments of the invention, drying device 2 can be riser drier 2, and thus, pyrolysis material is dried under the effect of flue gas and promotes, and the mixture of dried pyrolysis material and flue gas is discharged riser drier, beneficially subsequent step and carried out.In drying device, while pyrolysis material is dried, also achieve the function of preheating, be conducive to improving speed and the efficiency of follow-up pyrolytic reaction, and pyrolysis material is dried and preheats by the flue gas using heat accumulation type radiant tube to discharge, achieve the comprehensive utilization of heat energy, effectively reduce energy consumption, reach the purpose of energy-conserving and environment-protective.
According to embodiments of the invention, the concrete kind of gas-solid separating device 4 is not particularly limited, as long as can be separated with flue gas by pyrolysis material.In some embodiments of the invention, gas-solid separating device 4 can be to be dried cyclone separator 4, it is possible to pyrolysis material and flue gas be separated quickly and efficiently, and good separating effect, and simple to operation, cost is relatively low.
According to embodiments of the invention, tail gas air-introduced machine 6 can also be further provided with between gas-solid separating device 4 and exhaust gas cleaner 7, the flue gas separating acquisition in gas-solid separating device can be delivered in exhaust gas cleaner by tail gas air-introduced machine quickly and efficiently, is conducive to improving operating efficiency.
According to embodiments of the invention, this pyrolysis plant is also provided with the chimney 8 being connected with exhaust gas cleaner, and the flue gas after exhaust gas cleaner purified treatment empties through chimney, thus, is conducive to protecting environment, reduces and pollute.
According to embodiments of the invention, as it is shown in figure 1, this synthesis gas system farther includes combustion gas pressure fan 13, one end of described combustion gas pressure fan is connected with the outlet of described fuel cartridge, and the other end is connected with the fuel gas inlet 322 of described heat accumulation type radiant tube.Thus, the fuel gas inlet 322 of the radiant tube of pyrolysis reactor sent into by a part of combustible gas through combustion gas pressure fan.
According to embodiments of the invention, as it is shown in figure 1, this synthesis gas system farther includes combustion gas air-introduced machine 11, wherein, described combustion gas air-introduced machine is arranged between described spray column and described fuel cartridge.The outlet of spray column is connected with combustion gas air-introduced machine entrance, and the outlet of combustion gas air-introduced machine is connected with fuel cartridge entrance, and fuel cartridge outlet is connected with generating set.
In another aspect of the present invention, the invention provides a kind of method utilizing foregoing system to carry out pyrolysis of coal and cracking aerogenesis associating fuel gas generation.According to embodiments of the invention, the method may comprise steps of:
A. particulate coal is joined in reactor by charging aperture, in the pyrolysis chamber of described reactor, complete pyrolytic process.Wherein, the described particulate coal charging aperture from reactor top joins reactor, and is broken up by the heat accumulation type radiant tube in reactor, and pyrolysis char exports from the semicoke of reactor bottom and discharges, and discharges through semicoke conveying device (preferably conveying worm).
According to a particular embodiment of the invention, the concrete kind and the particle diameter that are applicable to the pyrolysis material that this electricity generation system processes are not particularly limited, according to embodiments of the invention, pyrolysis material can be oil shale, the fossil fuels such as coal, can also be rubbish, mud, junked tire etc., pyrolysis material can be that block pyrolysis material can also be for little particle pyrolysis material, in a preferred embodiment of the invention, this electricity generation system uses particle diameter 10mm particles below coal, thus, little particle pyrolysis material can be made full use of, resource utilization is high, and can solve the problem that the problem that bulk deposition pollutes environment.
According to embodiments of the invention, particulate coal can be broken up and be made it be uniformly distributed by the heat accumulation type radiant tube arranged in the pyrolysis chamber of reactor, particulate coal stops 1-50 minute the most from top to bottom, particulate coal is heated to 500-600 DEG C by the heat accumulation type radiant tube in reactor pyrolysis chamber, specifically, can be 500-700 DEG C by the temperature of gas valve control heat accumulation type radiant tube tube wall, particulate coal is heated to the most rapidly 500-600 DEG C, completes pyrolytic process.
B. it is pyrolyzed the oil gas of generation, by the communication member arranged on the heat insulation brick wall of described reactor, enters into the cracking room of described reactor.
According to embodiments of the invention, heat insulation brick wall is arranged in reactor, preferably, being positioned at the 2/3 of reactor transverse width, the thickness of heat insulation brick wall is 5-15cm, heat insulation brick wall is vertically through in reactor, the inner space of reactor is separated into pyrolysis chamber and cracking room, and this structure makes to be provided with pyrolysis chamber and cracking room in a body of heater, the oil gas that pyrolysis chamber produces, cracking room can be entered and carry out deep pyrolytic, the tar molecules of big molecule is cracked into the gaseous hydrocarbons of little molecule.Thus, two kinds of operations can be carried out in a body of heater, unite two into one, save construction cost and floor space.According to embodiments of the invention, communication member can be the pore area including multiple hole being arranged on heat insulation brick wall, it is also possible to for, on heat insulation brick wall longitudinal length, being positioned at the opening of lower position.Concrete, the oil gas of pyrolysis generation, by pore area or the opening of reactor heat insulation brick wall bottom, enter into cracking room.
C. the oil gas being pyrolyzed generation completes thermal cracking processes in described cracking room, produces cracking gas.
According to embodiments of the invention, in described cracking room, distributed at least described heat accumulation type radiant tube, it is preferred that described at least heat accumulation type radiant tube is uniformly distributed.The oil gas that heat accumulation type radiant tube can be effective to cracking is indoor heats so that it is carry out cracking reaction.Concrete, pyrolysis oil gas is heated to 650-900 DEG C by the heat accumulation type radiant tube in reactor cracking room, specifically, can be 650-900 DEG C by the temperature of gas valve control heat accumulation type radiant tube tube wall, particulate coal is heated to the most rapidly 650-900 DEG C, complete thermal cracking processes, thus, the tar molecules of big molecule is cracked into the gaseous hydrocarbons of little molecule, produces substantial amounts of cracking gas, the problem avoiding pyrolysis oil dust-laden, the clean and effective being truly realized fossil fuel utilizes.
The most described cracking gas enters in spray column by cracking gas outlet, and described cracking gas is carried out purified treatment.
The most purified clean cracking gas sends into fuel cartridge through combustion gas air-introduced machine, and the gas part in described fuel cartridge sends into the fuel gas inlet of heat accumulation type radiant tube through combustion gas pressure fan, and another part is sent into generating set, carried out combustion power generation.
Embodiment one:
(1) particulate coal being crushed to granularity≤10mm enters riser drier 2 by loading hopper 1, in riser drier, coal is dried and promotes by the 150-250 DEG C of flue gas utilizing the radiant tube smoke outlet from thermal storage type moving bed reactor 3, coal enters and is dried cyclone separator 4, the coal dust separated enters in pyrolysis hopper 5, the flue gas of about 70-130 DEG C is then admitted to exhaust gas cleaner 7 through tail gas air-introduced machine 6, reaches the flue gas after discharge standard and discharges through chimney 8.
(2) coal enters thermal storage type moving bed reactor 3 through rotary feeder 9 in pyrolysis hopper 5, and moving-burden bed reactor 3 is divided into pyrolysis chamber and cracking room by clathrate.
(3) being evenly arranged unidirectional heat accumulation type radiant tube in pyrolysis chamber, tube wall temperature utilizes gas control valve to control 500~700 DEG C of scopes, and material stops 1-40 minute the most from top to bottom, and is heated to 500~600 DEG C, completes pyrolytic process.
(4) oil gas that pyrolysis produces, opening by reactor lower part grid brick wall, entering into cracking room, be evenly arranged unidirectional heat accumulation type radiant tube in cracking room, tube wall temperature utilizes gas control valve to control 650~900 DEG C of scopes, pyrolysis oil gas is heated to 650-900 DEG C in cracking room, completing thermal cracking processes, the tar molecules of big molecule is cracked into the gaseous hydrocarbons of little molecule, produces substantial amounts of cracking gas, the problem avoiding pyrolysis oil dust-laden, the clean and effective being truly realized coal utilizes.
(5) cracking gas passes through reactor outlet, enter in spray column 10 and wash, clean cracking gas after washing sends into fuel cartridge 12 through combustion gas blower fan 11, a part of combustible gas sends into the radiant tube fuel gas inlet of pyrolysis reactor 3 through combustion gas pressure fan 13, major part combustible gas sends into jet dynamic control 15, in order to combustion power generation.
(6) semicoke that pyrolysis of coal produces is discharged by conveying worm 14, and semicoke can be used for combustion power generation or makes moulded coal.
Inventor finds, power generation system structure according to embodiments of the present invention is simple, and easy to operate, uniformity of temperature profile, heating effect is good.Reactor is divided into pyrolysis chamber and cracking room, the oil gas that pyrolysis chamber produces, cracking room can be entered and carry out deep pyrolytic, the tar molecules of big molecule is cracked into the gaseous hydrocarbons of little molecule, this reactor can produce substantial amounts of cracking gas, thus avoiding the problem producing pyrolysis oil dust-laden, the clean and effective being truly realized coal utilizes.In addition, two kinds of operations can be carried out in one body of heater, unite two into one, save construction cost and floor space, and, system that employs heat accumulation type radiant tube heating technique without gas, solid heat carrier heating, system process is simplified while improve the thermal efficiency of reactor, the supply radiant tube burning of cracking gas small part, residue combustion gas enters jet dynamic control, combustion power generation.
Utilizing pyrolysis of coal of the present invention and cracking aerogenesis associating gas power generation system to process brown coal, the basic data of raw material is shown in Table 1.
Table 1: brown coal basic data
Utilizing this system to process brown coal, the factor of created gase obtained is up to 18%, the factor of created gase obtained by being pyrolyzed far above laboratory aluminium rice steamer, and pyrolytic tar almost all is cracked into gaseous products, and factor of created gase is high.Cracking gas calorific value is up to 5500kcal/m3, quality is high.The cracking gas produced sends into jet dynamic control, combustion power generation.
In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include one or more this feature.
In the present invention, unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection ", the term such as " fixing " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral;Can be to be mechanically connected, it is also possible to be electrical connection;Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be connection or the interaction relationship of two elements of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means that the specific features, structure, material or the feature that combine this embodiment or example description are contained at least one embodiment or the example of the present invention.In this manual, what the schematic representation to above-mentioned term was not necessarily referring to is identical embodiment or example.And, the specific features of description, structure, material or feature can be to combine in one or more embodiments in office or example in an appropriate manner.Additionally, in the case of the most conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be combined and combine by those skilled in the art.
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is exemplary, it is not considered as limiting the invention, above-described embodiment can be changed, revises, replace and modification, simultaneously for one of ordinary skill in the art by those of ordinary skill in the art within the scope of the invention, according to the thought of the application, the most all will change.

Claims (10)

1. a pyrolysis and cracking aerogenesis associating gas power generation system, it is characterised in that including:
Pyrolysis hopper;
First feed arrangement, described first feed arrangement is connected with described pyrolysis hopper;
Pyrolysis and cracking reactor, including: charging aperture, pyrolysis chamber, cracking room and cracking gas outlet, described charging aperture is arranged on the roof of described pyrolysis chamber, and the outlet of described cracking gas is arranged on the sidewall of described cracking room;And:
Heat accumulation type radiant tube, described heat accumulation type radiant tube is along the short transverse multi-tier arrangement of described reactor inside described pyrolysis chamber and described cracking room, and every layer has the many described heat accumulation type radiant tubes arranged in the horizontal direction;
Heat insulation brick wall, described heat insulation brick wall is arranged at the 2/3 of described reactor transverse width, vertically through in described reactor, the inner space of described reactor is separated into described pyrolysis chamber and described cracking room;
Communication member, described communication member is arranged on the bottom of described heat insulation brick wall, for the oil gas produced described pyrolysis chamber, by described communication member, is passed into described cracking room;
Spray column, described spray column is connected with the outlet of described cracking gas;
Fuel cartridge, described fuel cartridge is connected with described spray column;
Generating set, described generating set is connected with described fuel cartridge.
System the most according to claim 1, it is characterised in that described communication member is the pore area including multiple hole being arranged on described heat insulation brick wall;Or described communication member is on described heat insulation brick wall longitudinal length, is positioned at the opening of lower position.
System the most according to claim 2, it is characterised in that the thickness of described heat insulation brick wall is 5-15cm, the height of described pore area is 3-15cm, a diameter of 1-3cm in described hole, and the height of described opening is 3-15cm.
4. according to the system according to any one of claim 1-3, it is characterised in that farther including combustion gas pressure fan, wherein, one end of described combustion gas pressure fan is connected with the outlet of described fuel cartridge, and the other end is connected with the fuel gas inlet of described heat accumulation type radiant tube.
5., according to the system according to any one of claim 1-3, it is characterised in that farther include combustion gas air-introduced machine, described combustion gas air-introduced machine is arranged between described spray column and described fuel cartridge.
6. according to the system according to any one of claim 1-3, it is characterised in that also include loading hopper;Second feed arrangement, it is connected with described loading hopper;Drying device, it is connected with the exhanst gas outlet on described second feed arrangement and described heat accumulation type radiant tube respectively;Gas-solid separating device, it is connected with described drying device and described pyrolysis hopper respectively;Exhaust gas cleaner, it is connected with described gas-solid separating device.
7. according to the system according to any one of claim 1-3, it is characterised in that described pyrolysis hopper is connected with described charging aperture by described first feed arrangement;Farther including semicoke outlet, the outlet of described semicoke is arranged on the bottom of described pyrolysis chamber, and the outlet of described semicoke is connected with described semicoke conveying device.
8. the method that the system utilized according to any one of claim 1-7 carries out being pyrolyzed and crack aerogenesis associating fuel gas generation, it is characterised in that comprise the following steps:
A. granule materials is joined in reactor by charging aperture, in the pyrolysis chamber of described reactor, complete pyrolytic process;
B. it is pyrolyzed the oil gas of generation, by the communication member arranged on the heat insulation brick wall of described reactor, enters into the cracking room of described reactor;
C. the oil gas being pyrolyzed generation completes thermal cracking processes in described cracking room, produces cracking gas;
The most described cracking gas enters in spray column by cracking gas outlet, and described cracking gas is carried out purified treatment;
The most purified clean cracking gas sends into fuel cartridge through combustion gas air-introduced machine, and the gas part in described fuel cartridge sends into the fuel gas inlet of heat accumulation type radiant tube through combustion gas pressure fan, and another part is sent into generating set, carried out combustion power generation.
Method the most according to claim 8, it is characterized in that, in described step a, the described granule materials charging aperture from described reactor top joins described reactor, and broken up by the described heat accumulation type radiant tube in described reactor, pyrolysis char exports from the semicoke of described reactor bottom and discharges;In described step a, described granule materials is heated to 500-600 DEG C by the described heat accumulation type radiant tube in described reactor pyrolysis chamber, and in described step b, described pyrolysis oil gas is heated to 650-900 DEG C by the described heat accumulation type radiant tube in described reactor cracking room.
Method the most according to claim 8, it is characterised in that the granularity of described granule materials is below 10mm.
CN201610332315.5A 2016-05-19 2016-05-19 Coal pyrolysis and cracking gas production combined gas power generation system Pending CN105838460A (en)

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