CN104776426B - A kind of coal gas cooperates with generating, multi-joint-production apparatus and method with fine coal - Google Patents

A kind of coal gas cooperates with generating, multi-joint-production apparatus and method with fine coal Download PDF

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CN104776426B
CN104776426B CN201510150138.4A CN201510150138A CN104776426B CN 104776426 B CN104776426 B CN 104776426B CN 201510150138 A CN201510150138 A CN 201510150138A CN 104776426 B CN104776426 B CN 104776426B
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gas
boiler
tar
tower
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李大鹏
王宁波
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李大鹏
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/14Combined heat and power generation [CHP]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Abstract

A kind of coal gas cooperates with generating, multi-joint-production apparatus and method with fine coal, with high volatile poor quality coal lignite, jet coal, non-caking coal, weakly caking coal, bottle coal as feed coal, by the dispenser that pressurizes into carrying out efficient fast pyrogenation reaction in gasification and pyrolysis coupled reactor.The tar reclaimed in pyrolysis raw gas is after purifying pretreatment, then carries out deep processing conversion, is eventually converted into the clean fuels such as liquefied gas, gasoline, diesel oil;Separating obtained coal gas mix burning and produces steam drive steam turbine to be generated electricity with fuel coal dust in coal-powder boiler or CFBB.The present invention has carried out coal-based clean preparation of fuel and fuel gas generation technology highly integrated;Coal gas enters boiler and mixes with coal dust mixes burning, can significantly cut down smoke yields;PM in flue gas2.5And PM10Concentration is extremely low, realizes SO2、NOXAnd the low concentration discharge of the heavy metal such as lead, chromium, cadmium, arsenic, mercury;The step for realizing coal base energy multi-connection product and coal resources is efficiently utilized.

Description

A kind of coal gas cooperates with generating, multi-joint-production apparatus and method with fine coal
Technical field
The present invention relates to the high-efficiency cleaning trans-utilization and coal poly-generation technical field of coal, and in particular to a kind of coal is carried Take coal tar and produce clean fuel, by-product raw gas enters boiler of power plant according to special ratios mix the coal gas and powder of burning with fine coal Coal collaboration generating, multi-joint-production apparatus and method.
Background technology
According to the world energy sources statistical yearbooks in 2013 that BP companies announce, the primary energy structure of consumer demand Central Plains of the world in 2013 Oil, natural gas, coal, nuclear energy, water power, regenerative resource mean ratio are 32.9:23.7:30.1:4.4:6.7:2.2, and I The corresponding ratio of state is then 17.8:5.1:67.5:0.9:7.2:1.5.Energy consumption structure of the China based on coal, is directly to make It is also to cause the overall efficiency of energy utilization of China lowly into the first cause of China's environmental pollution, what economic benefit was not good enough is important One of reason.In recent years, although the shared proportion in whole primary energy consumption structure of coal in China declining year by year, but I The energy consumption structure of state's main body changes less substantially, and coal is still the major consumers energy of China, and in nearly 50 years The status of its main body consuming energy will not be changed.Accordingly, it would be desirable to improve coal utilization efficiency by some measures, such as promote Coal deep processing, reduction pollutant emission, popularization clean coal technology etc., this is also to promote the healthy and stable development of coal industry, Improve the inevitable approach of China's Energy situation.
The NOx generated in coal combustion process has three kinds of modes:1. thermal NO x, it be nitrogen in air at high temperature The NOx for aoxidizing and generating;2. fuel type NOx, it is that the nitrogen compound contained in fuel is thermally decomposed in combustion, after And the NOx for aoxidizing and generating;3. Quick-type, hydrocarbon radical reaction life when it is burning in air in nitrogen and fuel Into NOx.Under common ignition temperature, in the NOx of coal combustion generation, NO accounts for more than 90%, NO2Account for 5%~10%.
Wherein thermal NOXGeneration it is main more than 1400 DEG C when, the nitrogen in air at high temperature, thermal NOXCan Up to 20%, wherein fuel type NOXAccount for NOXThe 75%~90% of total amount.As the important component of denitration technology, by its skill Art principle, can be divided into two major classes:The first kind is to reduce the ignition temperature in boiler to reduce thermal NOXGeneration;Second Class is the reproducibility atmosphere for building coal powder ignition region to reduce fuel type NOXGeneration.
It is substantially with the blast furnace gas of steel mill, coke oven that existing pulverized-coal fired boiler or fluidized-bed combustion boiler mix burning electricity generation system The raw coke oven gas of coal gas or coke-oven plant carries out mixing burning with coal, by co-combustion system reduction burner hearth pulverized coal friring temperature, forms burning Restore-zone atmosphere, suppresses fuel type and thermal NO to the full extentXGrowing amount.But existing co-combustion system all will combustion Coal power generation technology, coal-based clean liquid fuel production technology are combined, and do not realize that coal base energy multi-connection is produced and coal resources really Step efficiently utilize.
The content of the invention
It is an object of the invention to provide one kind can realize coal resources efficiently, step, comprehensive utilization, so as to by fire coal Generation technology, coal-based clean liquid fuel production technology are combined, and realize that coal base energy multi-connection is produced and the step of coal resources is high The coal gas that effect is utilized cooperates with generating, multi-joint-production apparatus and method with fine coal.
To reach above-mentioned purpose, coal gas of the invention cooperates with the generating, multi-joint-production apparatus to include coal dust feed arrangement with fine coal And the gasification being connected with coal dust feed arrangement-pyrolysis coupling reactor and boiler, what gasification-pyrolysis coupling reactor was exported contains The raw gas of tar and ash content is connected with dedusting, separator, and the tar in the raw gas reclaimed by dedusting, separator is sent into Follow-up tar oil treatment device obtains naphtha and diesel oil, and two are divided into after raw gas removing dust, separator containing tar and ash content Individual branch road enters in boiler and burns, coal gas for branch road by the burner nozzle on boiler furnace top enter in boiler with combustion Material coal carries out blending burning, and the coal gas of another branch road enters boiler by the burner nozzle of boiler convection heat exchanging segment, with warp Supplement combustion air nozzle is mixed into the preheated air of boiler convection heat exchanging segment, flake hearth-tapping by the flue gas after radiation heat transfer Carry out second-time burning, and with boiler in cross heat exchanger, again heat exchanger, economizer, air preheater carry out heat convection, Superheated steam and reheated steam produced by boiler overheating heat exchanger and again heat exchanger respectively by superheated steam high pressure turbine, Reheated steam intermediate pressure turbine drives generating set to generate electricity, and the flue gas that boiler bottom exhanst gas outlet is discharged sends into follow-up fume treatment Device;
Cold air is divided to and is also divided into two branch roads after being preheated through boiler air preheater, enters through boiler bottom preheated air all the way Mouth enters boiler furnace, and another road is changed with flake hearth-tapping through supplementing combustion air nozzle by the flue gas after radiation heat transfer, through convection current The burner nozzle of hot arc is mixed into the coal gas of boiler and carries out second-time burning.
Primary deduster that described dedusting, separator include being sequentially connected, depth deduster, oil-gas knockout tower and Depth oil-gas knockout tower, wherein primary deduster entrance is connected with the outlet of gasification-pyrolysis coupling reactor, depth oil-gas point Outlet from tower divides two-way burner nozzle, the burner nozzle phase of boiler convection heat exchanging segment respectively with boiler furnace top Even, primary deduster and the outlet of depth deduster lower end is connected by pipeline with gasification-pyrolysis coupling reactor, and oil-gas is separated The lower end outlet of tower and depth oil-gas knockout tower is connected with follow-up tar oil treatment device by the road.
Described gasification-pyrolysis coupling reactor is carried as heat using the solid circle particle of circulating ratio scope 5~100 The integrated recirculating fluidized bed pyrolytic reaction device of gasification-pyrolysis of body.
Described boiler is the coal-powder boiler or CFBB of coal-burning power plant
It is 2020t/h's for the subcritical boiler or nominal output of 35~1025t/h that described boiler uses nominal output Super critical boiler, exerting oneself for boiler is adjusted by adjusting the ratio shared by blending gas in the range of 0%~70wt%.
Described follow-up flue gas processing device includes the gas wash tower, fume desulfurizing tower and the denitrating flue gas tower that are sequentially connected, warp Flue gas after udst separation is divided into two branch roads after being pressurizeed through air-introduced machine:Flue gas is continuous with pressurization by circulating flue gas pipeline all the way The suction line of feeder is connected, and another road flue gas is then arranged by outside chimney.
Described follow-up tar oil treatment device includes end to end tar storage tank, tar surge tank, tar desalination successively Tower feed pump, tar desalination tower, tar udst separation tower feed pump, tar udst separation tower, the charging of tar pre-hydrotreating reaction tower Pump, tar pre-hydrotreating reaction tower, hydrogenation of tar refining reaction tower and tar refining product rectification tower, rectifying product is respectively by tar Refined products rectifying column top and outlet at bottom enter Naphtha tank and diesel oil tank.
Coal gas of the present invention cooperates with generating, Poly-generation method with fine coal, comprises the following steps:
1) by the one kind in high volatile poor quality coal lignite, jet coal, non-caking coal, weakly caking coal, bottle coal, gangue Or the feed coal drying of several compositions to moisture content is 1.0~2.0wt% and is crushed to particle diameter for 50~500 μm of raw material coal dusts;
2) by step 2) raw material coal dust conveyed into pressurization continuous feeders by circulating flue gas, 0.1~2.0MPa connect Continuous stabilization charging, raw material coal dust enters gasification-pyrolysis coupling reactor by continuous feeders of pressurizeing, in 450~1100 DEG C, Carry out rapid conversion under the conditions of 0.1~1.5MPa, the raw gas that feed coal is converted into enters resulting after dedusting, separator Tar send into tar component during follow-up tar oil treatment device reclaims raw gas;
3) step 2) described in raw gas in tar component by absorption, condensation separation with extract cooperate with technique to be returned Receive;
4) step 3) crude coal tar that is reclaimed is by after necessary purification pretreatment, then deep processing conversion is carried out, will Its cleaning combustion for being eventually converted into main comprehensive more than the liquid fuel yield 85wt% being made up of liquefied gas, gasoline, diesel oil Material oil product;
5) it is divided into two branch according to the ratio of 0~70wt% by the purification coal gas of gained after dedusting, separator treatment Road is entered in boiler by burner nozzle burns, and the coal gas of one of branch road is by the burner positioned at boiler furnace top Into burner hearth, carry out mixing burning with bunker coal, the flue-gas temperature of generation is 1200~1400 DEG C and is changed by the radiation laid in burner hearth Hot face produces saturated vapor, coal gas to mix the oxygen-enriched combusting or sky that burning mode can be 30~70vol% of oxygen content with bunker coal Gas burns;The coal gas of another branch road enters boiler by the burner nozzle of boiler convection heat exchanging segment, with supplement combustion air, Flake hearth-tapping carries out second-time burning by the Gas phase Smoke mixing after radiation heat transfer, and the flue-gas temperature for producing of burning is 850~1000 DEG C, This part burning produced by high-temperature flue gas again with boiler in cross heat exchanger, again heat exchanger, economizer, air preheater Carry out heat convection.50~70wt% heating power can be cut down under 1200~1400 DEG C, 850~1000 DEG C of blending combusted proportion Type and 30~50wt% fuel types NOXGeneration;
6) by the flue gas after heat convection again by after follow-up flue gas processing device purified treatment, all the way by air-introduced machine Outside into chimney of electric plant arrange, lead up to coal dust conveying feed channel as conveying gas by coal dust send into step 2) described in it is continuous plus Pressure dispenser.
Described entrance boiler with coal dust mix the coal gas Lower heat value produced by the gasification-pyrolysis coupling reactor of burning It is 4000~8000kJ/Nm3
Compared with direct coal-fired power generator set, the present invention has obvious technical advantage, can produce following beneficial effect:
1) coal-based clean preparation of fuel and fuel gas generation technology have been carried out highly integrated;
2) the efficient of coal resources, cleaning and cascade utilization are realized;
3) compared with coal directly burns, coal gas enters boiler and mixes with coal dust mixes burning, can significantly cut down smoke yields;
4) pyrolysis coal gas enters PM in the flue gas produced by boiler combustion2.5And PM10It is extremely low Deng inspirable particle concentration, can Realize SO2、NOXAnd the low concentration discharge of the heavy metal such as lead, chromium, cadmium, arsenic, mercury.
The tar that the present invention is reclaimed is after purifying pretreatment, then carries out deep processing conversion, is eventually converted into liquid Change the clean fuels such as gas, gasoline, diesel oil;Coal gas and bunker coal mix burning in boiler, can cut down 50~70% heating power type and 30~50% fuel type NOXGeneration.
Brief description of the drawings
Fig. 1 is overall structure diagram of the invention.
In figure:1st, raw material coal bunker 2, feed storage tank 3, feed hopper 4, lock hopper 5, pressurization continuous feeders 6, gasification-heat Decoupling reactor 7, primary deduster 8, depth deduster 9, oil-gas knockout tower 10, depth oil-gas knockout tower 11, pot Stove 12, flue gas ash removal tower 13, fume desulfurizing tower 14, denitrating flue gas tower 15, chimney 16, tar storage tank 17, tar desalination Tower 18, tar udst separation tower 19, tar pre-hydrotreating reaction tower 20, hydrogenation of tar refining reaction tower 21, tar desalination tower Feed pump 22, tar udst separation tower feed pump 23, tar pre-hydrotreating reaction tower feed pump 24, tar refining product rectification Tower 25, tar surge tank 26, Naphtha tank 27, diesel oil tank 28, gasification-pyrolysis coupling reactor feed nozzle 29, Boiler feed nozzle 30, gasification-pyrolysis coupling reactor outlet 31, boiler furnace burner nozzle (31) 32, boiler convection The burner nozzle 33 of heat exchanging segment, supplement combustion air nozzle 34, boiler flue gas outlet 35, circulating flue gas pipeline 36, essence Evaporate tower top outlet 37, rectifying column bottom outlet 38, tar refining product rectification tower entrance 39, boiler bottom preheated air entrance 40th, cold air 41, air-introduced machine.
Specific embodiment
In order that technical scheme and advantage are more clear apparent, below in conjunction with the accompanying drawings and embodiment, to this hair It is bright to be further elaborated.
Referring to Fig. 1, the inventive system comprises coal dust feed arrangement and the gasification-pyrolysis being connected with coal dust feed arrangement Coupled reactor 6 and boiler 11;The raw gas containing tar and ash content of the output of gasification-pyrolysis coupling reactor 6 and dedusting, separate Device is connected, the tar in the raw gas reclaimed by dedusting, separator send into follow-up tar oil treatment device obtain naphtha and Diesel oil, is divided into two branch roads into burning, a branch in boiler 11 after raw gas removing dust, separator containing tar and ash content The coal gas on road by the burner nozzle 31 on boiler furnace top into carrying out blending burning with bunker coal in boiler 11, another The coal gas of branch road enters boiler 11 by the burner nozzle 32 of boiler convection heat exchanging segment, enters with through supplementing combustion air nozzle 33 Enter the preheated air of the heat convection of boiler 11 section, flake hearth-tapping carries out second-time burning by the Gas phase Smoke mixing after radiation heat transfer, and With the heat exchanger excessively in boiler 11, heat exchanger, economizer, air preheater carry out heat convection again, and the overheat of boiler 11 is changed Superheated steam and reheated steam produced by hot device and again heat exchanger are respectively by superheated steam high pressure turbine, reheated steam Pressure turbine drives generating set to generate electricity, and the flue gas that the bottom exhanst gas outlet 34 of boiler 11 is discharged is through follow-up flue gas processing device heel row Go out;
Cold air 40 be divided to and is also divided into two branch roads after being preheated through boiler air preheater, all the way through the bottom heating of boiler 11 sky Gas entrance 39 enters the burner hearth of boiler 11, and another road is through supplementing combustion air nozzle 33 with flake hearth-tapping by the cigarette after radiation heat transfer Gas, mixed into the coal gas of boiler 11 and carry out second-time burning through the burner nozzle 33 of heat convection section.
Described dedusting, separator include the primary deduster 7, depth deduster 8, the oil-gas knockout tower 9 that are sequentially connected With depth oil-gas knockout tower 10, wherein the primary entrance of deduster 7 is connected with the outlet of gasification-pyrolysis coupling reactor 6, depth The outlet point two-way of oil-gas knockout tower 10 respectively with the combustion of the burner nozzle 31, boiler convection heat exchanging segment on boiler furnace top Burner nozzle 32 is connected, and primary deduster 7 and the outlet of the lower end of depth deduster 8 are by pipeline and gasification-pyrolysis coupling reactor 6 It is connected, the lower end outlet of oil-gas knockout tower 9 and depth oil-gas knockout tower 10 is connected with follow-up tar oil treatment device by the road.
Described coal dust feed arrangement includes the raw material coal bunker 1 being sequentially connected, feed storage tank 2, feed hopper 3, lock hopper 4 and adds Pressure continuous feeders 5.
Described follow-up flue gas processing device includes the gas wash tower 12, fume desulfurizing tower 13 and the denitrating flue gas tower that are sequentially connected 14, the flue gas after removing dust purification is divided into two branch roads after being pressurizeed through air-introduced machine 41:Flue gas is by circulating flue gas pipeline 35 all the way Suction line with pressurization continuous feeders 5 is connected, and another road flue gas is then arranged by the way that chimney 15 is outer.
Described follow-up tar oil treatment device includes end to end tar storage tank 16, tar surge tank 25, tar successively Desalination tower feed pump 21, tar desalination tower 17, tar udst separation tower feed pump 22, tar udst separation tower 18, tar pre-add Hydrogen reaction tower feed pump 23, tar pre-hydrotreating reaction tower 19, hydrogenation of tar refining reaction tower 20 and tar refining product rectification tower 24, rectifying product enters Naphtha tank 26 and bavin by the top of tar refining product rectification tower 24 and outlet at bottom 36,37 respectively Oil tank 27.
Described gasification-pyrolysis coupling reactor 6 is using the solid circle particle of circulating ratio scope 5~100 as heat The gasification of carrier-thermal decomposition integrated recirculating fluidized bed pyrolytic reaction device.
Described boiler is coal-powder boiler or CFBB.
It is 2020t/h for the subcritical boiler or nominal output of 35~1025t/h that described boiler 11 uses nominal output Super critical boiler, adjust going out for boiler 11 by adjusting the ratio shared by blending gas in the range of 10%~70wt% Power.
Its process is as follows:First by one or more in high volatile poor quality coal such as lignite, jet coal, bituminous coal, coke The feed coal of composition is 50~400 μm of 1.0~2.0wt%, particle size range by the moisture content obtained by crushing, screening, drying Powder is added in raw material coal bunker 1, and the fine coal in raw material coal bunker 1 sequentially passes through feed storage tank 2, feed hopper 3, lock hopper 4 in circulation cigarette Under the conveying of gas enter pressurization continuous feeders 5, pressurization continuous feeders 5 under 0.1~2.0MPa pressure, respectively by charging Raw material coal dust stabilization is delivered to gasification-pyrolysis coupling reactor 6, boiler 11, gasification-pyrolysis coupling reactor 6 by nozzle 28,29 The raw gas containing tar and ash content of the output of outlet 30 sequentially passes through follow-up primary deduster 7, depth deduster 8, oil-gas point It is divided into two branch roads into burning in boiler 11 after tower 9, the removing of depth oil-gas knockout tower 10 dedusting, removing tar:One branch Road by the burner nozzle 31 on boiler furnace top into carrying out blending burning in boiler 11 with bunker coal, produced by multifuel combustion Flue-gas temperature is 1200~1400 DEG C;The coal gas of another branch road is entered by the burner nozzle 32 of boiler convection heat exchanging segment Boiler 11, changes into the preheated air of the heat convection of boiler 11 section, flake hearth-tapping with through supplementing combustion air nozzle 33 through overshoot The Gas phase Smoke mixing of 750~800 DEG C of temperature range carries out second-time burning after heat, and the temperature range 850 produced by second-time burning~ 1000 DEG C of flue gas again with boiler 11 in cross heat exchanger, heat exchanger, economizer, air preheater carry out convection current and change again Heat.Boiler 11 crosses heat exchanger and the superheated steam and reheated steam produced by heat exchanger pass through superheated steam high pressure respectively again Turbine, reheated steam intermediate pressure turbine drive generating set to generate electricity.
The flue gas of discharged 100~120 DEG C of the bottom exhanst gas outlet 34 of boiler 11 is de- through follow-up flue gas ash removal tower 12, flue gas It is divided into two branch roads after being pressurizeed through air-introduced machine 41 again after sulphur tower 13, the purification of the removing dust of denitrating flue gas tower 14:Flue gas is by following all the way Ring flue gas pipeline 35 is conveyed into pressurization continuous feeders 5 as the raw material fine coal that conveying gas exports lock hopper 4, continuous feed of pressurizeing In the stable transferring raw material coal dust of device 5 to gasification-pyrolysis coupling reactor 6, boiler 11;Another road flue gas is then by outside chimney 15 Row.
Cold air 40 be divided to and is also divided into two branch roads after being preheated through boiler air preheater, all the way through the bottom heating of boiler 11 sky Gas entrance 39 enters the burner hearth of boiler 11, and another Lu Zejing entrances 33 are changed with flake hearth-tapping as supplement combustion air nozzle through overshoot The flue gas of 800~900 DEG C of temperature range after heat, mixed into the coal gas of boiler 11 through the burner nozzle 32 of heat convection section Carry out second-time burning.
Oil-gas knockout tower 9, depth oil-gas knockout tower 10 are reclaimed by modes such as absorption, condensation separation, chemical extractions Raw gas in tar successively after tar storage tank 16, tar surge tank 25 through tar desalination tower feed pump 21 pressurize after enter Tar desalination tower 17, the tar after desalination after the pressurization of tar udst separation tower feed pump 22 by entering tar udst separation tower 18 In further carry out udst separation, through the tar after desalination, udst separation through tar pre-hydrotreating reaction tower feed pump 23 pressurize after Into tar pre-hydrotreating reaction tower 19, pre- hydrocracking reaction is carried out, the oil product after the lighting of pre- hydrogenation enters back into hydrogenation of tar Deep hydrofinishing is carried out in refining reaction tower 20.Deep hydrogenation product enters in tar refining product rectification tower 24 through entrance 38 Carry out the separation of different boiling range products.Rectifying product is respectively by the top of tar refining product rectification tower 24 and outlet at bottom 36,37 Into in Naphtha tank 26, diesel oil tank 27.

Claims (9)

1. a kind of coal gas cooperates with generating, multi-joint-production apparatus with fine coal, it is characterised in that:Including coal dust feed arrangement and and coal dust Feed arrangement connected gasification-pyrolysis coupling reactor (6) and boiler (11), what gasification-pyrolysis coupling reactor (6) was exported contains The raw gas of tar and ash content is connected with dedusting, separator, and the tar in the raw gas reclaimed by dedusting, separator is sent into Follow-up tar oil treatment device obtains naphtha and diesel oil, and two are divided into after raw gas removing dust, separator containing tar and ash content Individual branch road enters burning in boiler (11), and a coal gas for branch road enters pot by the burner nozzle (31) on boiler furnace top Blending burning is carried out in stove (11) with bunker coal, the coal gas of another branch road passes through the burner nozzle of boiler convection heat exchanging segment (32) enter boiler (11), with through supplement combustion air nozzle (33) enter boiler (11) heat convection section preheated air, go out Burner hearth carries out second-time burning by the Gas phase Smoke mixing after radiation heat transfer, and is changed with the cross heat exchanger, reheating in boiler (11) Hot device, economizer, air preheater carry out heat convection, and boiler (11) crosses heat exchanger and the again overheat produced by heat exchanger Steam and reheated steam drive generating set to generate electricity by superheated steam high pressure turbine, reheated steam intermediate pressure turbine respectively, boiler (11) flue gas that bottom exhanst gas outlet (34) is discharged sends into follow-up flue gas processing device;
Cold air (40) be divided to and is also divided into two branch roads after being preheated through boiler air preheater, all the way through boiler (11) bottom heating sky Gas entrance (39) enters boiler (11) burner hearth, and another road is through supplementing combustion air nozzle (33) with flake hearth-tapping by after radiation heat transfer Flue gas, the coal gas that enters boiler (11) through the burner nozzle (33) of heat convection section mixes and carries out second-time burning.
2. coal gas according to claim 1 cooperates with generating, multi-joint-production apparatus with fine coal, it is characterised in that:Described dedusting, Separator includes primary deduster (7), depth deduster (8), oil-gas knockout tower (9) and the depth oil-gas point that are sequentially connected From tower (10), wherein primary deduster (7) entrance is connected with the outlet of gasification-pyrolysis coupling reactor (6), depth oil-gas point Outlet from tower (10) divides two-way burner nozzle (31), the burner of boiler convection heat exchanging segment respectively with boiler furnace top Nozzle (32) is connected, and primary deduster (7) and the outlet of depth deduster (8) lower end are reacted by pipeline with gasification-pyrolysis coupling Device (6) is connected, and the lower end outlet of oil-gas knockout tower (9) and depth oil-gas knockout tower (10) is filled with follow-up tar processing by the road Put connected.
3. coal gas according to claim 1 cooperates with generating, multi-joint-production apparatus with fine coal, it is characterised in that:Described gasification- Pyrolysis coupling reactor (6) is the gasification-pyrolysis collection using the solid circle particle of circulating ratio scope 5~100 as heat carrier Into recirculating fluidized bed pyrolytic reaction device.
4. coal gas according to claim 1 cooperates with generating, multi-joint-production apparatus with fine coal, it is characterised in that:Described boiler (11) be existing coal-burning power plant coal-powder boiler or CFBB.
5. coal gas according to claim 1 cooperates with generating, multi-joint-production apparatus with fine coal, it is characterised in that:Described boiler (11) it is the super critical boiler of 2020t/h for the subcritical boiler or nominal output of 35~1025t/h to use nominal output, is passed through The ratio shared by blending gas is adjusted in the range of 0%~70wt% to adjust exerting oneself for boiler (11).
6. coal gas according to claim 2 cooperates with generating, multi-joint-production apparatus with fine coal, it is characterised in that:Described is follow-up Flue gas processing device includes the gas wash tower (12), fume desulfurizing tower (13) and the denitrating flue gas tower (14) that are sequentially connected, and removing dust is net Flue gas after change is divided into two branch roads after being pressurizeed through air-introduced machine (41):Flue gas connects by circulating flue gas pipeline (35) with pressurization all the way The suction line of continuous feeder (5) is connected, and another road flue gas is then arranged outward by chimney (15).
7. coal gas according to claim 2 cooperates with generating, multi-joint-production apparatus with fine coal, it is characterised in that:Described is follow-up Tar oil treatment device includes end to end tar storage tank (16), tar surge tank (25), tar desalination tower feed pump successively (21), hydrogenation is anti-in advance for tar desalination tower (17), tar udst separation tower feed pump (22), tar udst separation tower (18), tar Answer tower feed pump (23), tar pre-hydrotreating reaction tower (19), hydrogenation of tar refining reaction tower (20) and tar refining product rectification Tower (24), rectifying product enters naphtha and stores up by tar refining product rectification tower (24) top and outlet at bottom (36,37) respectively Tank (26) and diesel oil tank (27).
8. a kind of coal gas of device as claimed in claim 1 cooperates with generating, Poly-generation method with fine coal, it is characterised in that including with Lower step:
1) by the one kind or several in high volatile poor quality coal lignite, jet coal, non-caking coal, weakly caking coal, bottle coal, gangue Feed coal drying to the moisture content for planting composition is 1.0~2.0wt% and is crushed to particle diameter for 50~500 μm of raw material coal dusts;
2) by step 1) raw material coal dust conveyed into pressurization continuous feeders (5) by circulating flue gas, it is continuous in 0.1~2.0MPa Stabilization charging, raw material coal dust enters gasification-pyrolysis coupling reactor (6) by continuous feeders of pressurizeing (5), in 450~1100 DEG C, rapid conversion is carried out under the conditions of 0.1~1.5MPa, the raw gas that feed coal is converted into enters institute after dedusting, separator The tar for obtaining sends into the tar component during follow-up tar oil treatment device reclaims raw gas;
3) step 2) described in raw gas in tar component by absorption, condensation separation with extract cooperate with technique to be reclaimed;
4) step 3) crude coal tar that is reclaimed is by after necessary purification pretreatment, then deep processing conversion is carried out, by it most The clean fuel oil of main comprehensive more than the liquid fuel yield 85wt% being made up of liquefied gas, gasoline, diesel oil is converted into eventually Product;
5) it is divided into two branch roads according to the ratio of 0~70wt% by the purification coal gas of gained after dedusting, separator treatment to lead to Burner nozzle into burning in boiler is crossed, the coal gas of one of branch road is entered by the burner positioned at boiler furnace top Burner hearth, carries out mixing burning with bunker coal, and the flue-gas temperature of generation is 1200~1400 DEG C of radiation heat transfer faces by being laid in burner hearth Saturated vapor, coal gas is produced to mix the oxygen-enriched combusting or air burning that burning mode is 30~70vol% of oxygen content with bunker coal;Separately One coal gas of branch road enters boiler by the burner nozzle of boiler convection heat exchanging segment, is passed through with supplement combustion air, flake hearth-tapping Gas phase Smoke mixing after overshoot heat exchange carries out second-time burning, and the flue-gas temperature for producing of burning is 850~1000 DEG C, the combustion of this part Burn produced by high-temperature flue gas again with boiler in cross heat exchanger, heat exchanger, economizer, air preheater carry out convection current again Heat exchange, can be cut down under 1200~1400 DEG C, 850~1000 DEG C of blending combusted proportion 50~70wt% heating power type and 30~ 50wt% fuel types NOXGeneration;
6) by the flue gas after heat convection again by after follow-up flue gas processing device purified treatment, entering by air-introduced machine all the way Outside chimney of electric plant arrange, lead up to coal dust conveying feed channel as conveying gas by coal dust send into step 2) described in pressurization continuously enter Glassware (5).
9. coal gas according to claim 8 cooperates with generating, Poly-generation method with fine coal, it is characterised in that:Into boiler with The coal gas Lower heat value that coal dust mix produced by the gasification-pyrolysis coupling reactor (6) of burning is 4000~8000kJ/Nm3
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