CN105505469B - A kind of downdraft fixed bed gasification steam-electric power combined production device and technique - Google Patents
A kind of downdraft fixed bed gasification steam-electric power combined production device and technique Download PDFInfo
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- CN105505469B CN105505469B CN201610055020.8A CN201610055020A CN105505469B CN 105505469 B CN105505469 B CN 105505469B CN 201610055020 A CN201610055020 A CN 201610055020A CN 105505469 B CN105505469 B CN 105505469B
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Abstract
The present invention provides a kind of downdraft fixed bed gasification steam-electric power combined production device, including：Gasification system, electricity generation system, the electricity generation system drives work by gasification system, the electricity generation system includes gas combustion chamber, gas combustion chamber is connected with pyrolysis combustion gas blower fan, gasification burning blower fan, air preheater, boiler heating surface are provided with desulfurization chamber, exhaust gas processing device is connected with the top of desulfurization chamber, middle body of heater is connected through pipeline with the low pressure (LP) cylinder of steam turbine, and generator is provided with steam turbine.Biomass-pyrolysis fuel gas biomass carbon Electricity Federation production of the present invention is by volatile matter and fixed carbon feature dimerous based on biomass combustible component, using decoupling reactive mode, fixed carbon in biomass transforms into the nitrogenous activated carbon for possessing high-efficiency desulfurization property, volatile matter, which transforms into pyrolysis combustion gas and gasification burning and then burnt, obtains electric energy, utilize nitrogen oxides caused by the macromolecule tar abatement fuel gas buring being pyrolyzed in combustion gas, realize, realize combustion tail gas cleaning discharge.
Description
Technical field
The present invention relates to biomass utilization technologies field, specially a kind of downdraft fixed bed gasification steam-electric power coproduction dress
Put and technique.
Background technology
With increasingly highlighting for global energy and environmental problem, new energy development turns into a urgent task.Biomass
The energy have aboundresources, can be exchanged into clean fuel, be uniquely can store and transport regenerative resource, and uniquely can be again
The distinguishing features such as raw charcoal source, meeting future society energy demand, promoting social sustainable development etc. to play important work
With.The specific species of biomass is a lot, refer mainly to timber, crops (stalk, straw, straw, beans stalk, Cotton Stalk, husk etc.),
Weeds, algae etc..The biomass energy in China is also extremely abundant, can be developed into the biomass resource of the energy up to more than 300,000,000 tons of mark coals, and
With agricultural and the development of forestry, the exploitation in particular with fast-growing charcoal firewood woods is promoted, and the biomass resource in China will increasingly
It is more, there are very big development and utilization potentiality.
For China's biomass based on stalk, husk and forestry waste, existing biomass fermentation electrically mainly has gas
Change internal combustion engine generator group to generate electricity and two kinds of direct combustion power generation, gasifying electricity generation scale is smaller, it is difficult to realize heavy industrialization application, directly
Combustion generating scale is relatively large, and fuel transport radius is big, and fuel cost is high, fails to comprehensively utilize biomass material, existing
The biomass direct-fired power plant that has is mostly in closing down or lossing state, and two kinds of its sulfur dioxide of biomass generation and nitrogen oxygen
Compound discharge capacity is high, causes secondary pollution.Biomass-pyrolysis fuel gas biomass carbon Electricity Federation production of the present invention is can based on biomass
Component is fired by volatile matter and fixed carbon feature dimerous, using decoupling reactive mode, the fixation carbon conversion in biomass
As possessing the nitrogenous activated carbon of high-efficiency desulfurization property, volatile matter transforms into pyrolysis combustion gas and gasification burning and then burnt and obtains
Electric energy, using nitrogen oxides caused by the macromolecule tar abatement fuel gas buring being pyrolyzed in combustion gas, realize, realize combustion tail gas
Cleaning discharge.
The content of the invention
Technical problem solved by the invention be to provide a kind of downdraft fixed bed gasification steam-electric power combined production device and
Technique, to solve the problems, such as in above-mentioned background technology.
Technical problem solved by the invention is realized using following technical scheme：A kind of downdraft fixed bed gasification steam
Power generating simultaneously device, including：Gasification system, electricity generation system, the electricity generation system drive work, the gasification system by gasification system
System includes furnace roof, middle body of heater, lower furnace body, and the middle body of heater is arranged on lower furnace body, and lower furnace body is arranged on base, middle
Furnace roof is installed on body of heater, feeding device, primary air nozzle be installed on the furnace roof, middle body of heater side be provided with overfiren air port,
Opposite side is provided with pyrolysis gas outlet, and main shaft is provided with intermediate furnace body, and main shaft upper end is connected to power set, lower end is provided with and dialled
Glassware, be provided with fire grate in the lower furnace body on the downside of setting gauge, fire grate is arranged in lower furnace body by fire grate support, and lower furnace body bottom is pacified
Charcoal device is housed out, the pyrolysis gas outlet is connected to electricity generation system by being pyrolyzed combustion gas blower fan, and the lower furnace body side is set
There is gasification burning outlet, gasification burning outlet is connected to gasification burning blower fan, the connection of gasification burning blower fan by cyclone separator
In electricity generation system.
The electricity generation system includes gas combustion chamber, and gas combustion chamber is connected with pyrolysis combustion gas blower fan, gasification burning blower fan,
Cyclone separator bottom carbon outlet port is connected through pipeline with the import of desulfurization chamber and charcoal conveying fan, and it is pre- that air is provided with desulfurization chamber
Hot device, boiler heating surface, desulfurization chamber top are connected with exhaust gas processing device, low pressure (LP) cylinder phase of the middle body of heater through pipeline with steam turbine
Connection, pipeline between middle body of heater and turbine low pressure cylinder are provided with the ammonia device being connected with this pipeline, on steam turbine
Generator is installed.
Air blower is connected with the air preheater, is connected with waterworks on boiler heating surface.
The fire grate side is connected with motor by little gear.
A kind of production technology based on downdraft fixed bed gasification steam-electric power combined production device, it is characterised in that：Including with
Lower step：
(1) biomass material is added by feeding device from furnace roof, and the First air needed for material gasification is inhaled by primary air nozzle
Enter, pyrolysis gasification reaction occurs in intermediate furnace body under the radiation effects of high-temperature material with air for biomass material, and generation contains
The biomass high temperature pyrolysis combustion gas of higher tar content and charcoal, high temperature pyrolysis combustion gas are pyrolyzed combustion gas blower fan by gasification furnace
Portion, which is extracted out, is sent to gas combustion chamber's burning.Entered for the Secondary Air of charcoal activation and the vapor of carrying ammonia by middle body of heater
Enter, react to obtain the nitrogenous activated carbon and gasification burning that possess desulfurization characteristic, the gasification extracted out by gasification furnace bottom with charcoal
The nitrogenous activated carbon that combustion gas carries powdery realizes gas solid separation in cyclone separator, and gasification burning delivers to combustion gas by combustion gas blower fan
Combustion chambers burn；The nitrogenous activated carbon of powdery is sent to the desulfurization that desulfurization chamber is used for tail gas after fuel gas buring indoor fuel gas burns, block
The nitrogenous activated carbon of shape is discharged by the charcoal device that goes out for the furnace bottom that gasifies；
(2) high-temperature gasification combustion gas at the top of gas combustion chamber by entering, after being mixed with the air after air preheater preheats
Burnt, by controlling the air amount of feeding, it is reproducibility atmosphere to realize gas combustion chamber top combustion zone, suppresses nitrogen oxides
Generation, while the air after air preheater preheats is sprayed into the middle part of gas combustion chamber, realize that fuel gas buring indoor fuel gas is complete
Full after-flame and certain oxygen content is kept, the bottom of gas combustion chamber sprays into the high temperature pyrolysis combustion gas containing macromolecule tar, profit
Realize that nitrogen oxides in effluent reduces with the reproducibility of macromolecule tar；
(3) caused high-temperature flue gas enters desulfurization after passing sequentially through boiler heating surface, air preheater in fuel gas buring room
Room, superheated steam is produced by boiler heating surface, superheated steam enters steam turbine acting and generated electricity, and the steam after partly doing work is by vapour
Body of heater carries out charcoal activation among being sent into after the ammonia blending that the low pressure (LP) cylinder of turbine is drawn and provided with ammonia device；
(4) flue gas entered in desulfurization chamber blends with the nitrogenous activated carbon of powdery, and the sulfur dioxide in flue gas is inhaled by activated carbon
Attached oxidation, is removed from flue gas, and the dust in powdered activated carbon and flue gas discharges after being removed by tail gas treating unit, and flue gas is realized
Qualified discharge.
The mass ratio of the biomass and ammonia is 100~500kg/kg.The desulfurization room temperature is 80~200 DEG C.
The outlet temperature of the pyrolysis combustion gas is 200~400 DEG C, and gasification burning outlet temperature is 400~600 DEG C.The fuel gas buring
In-furnace temperature is 700-1300 DEG C, and the mass ratio of gasification burning and pyrolysis combustion gas is 0.5~3kg/kg.
Compared with disclosed technology, there is advantages below in the present invention：
Biomass-pyrolysis fuel gas biomass carbon Electricity Federation production of the present invention is to be based on biomass combustible component by volatile matter and consolidate
Determine carbon feature dimerous, using decoupling reactive mode, the fixed carbon in biomass, which transforms into, possesses high-efficiency desulfurization
The nitrogenous activated carbon of matter, volatile matter, which transforms into pyrolysis combustion gas and gasification burning and then burnt, obtains electric energy, using being pyrolyzed combustion gas
In macromolecule tar abatement fuel gas buring caused by nitrogen oxides, realize, realize combustion tail gas cleaning discharge.
The present invention combines biomass power generation and Activated Carbon Production, realizes discarded agriculture and forestry organic waste material
Efficient Conversion is electric power and activated carbon to biomass resource in a system, greatly adds the value of biomass, carries
The economic benefit of high enterprise, reduce the cost of investment of enterprise.
Combustion gas after gasification of biomass is divided into gasification burning and pyrolysis combustion gas by the present invention, is fired using the low nitrogen of classification dispatching
Burning technology, using the stronger reduction for being pyrolyzed combustion gas and containing macromolecule tar, realize after biological fuel gas burning in tail gas
The low emission of nitrogen oxides, due to being activated jointly using ammonia and vapor, contain carbon-to-nitrogen (C-N) netted functional group being formed
Nitrogenous activated carbon, while be used for using nitrogenous activated carbon caused by gasification system the desulfurization of tail gas, using sulfur dioxide containing
The effect of nitrogen activated carbon catalysis is lower to occur (SO2+H2O+O2=H2SO4) reaction, sulfuric acid droplets are formed, and then by micropore in activated carbon
Adsorption, the low emission of sulfur dioxide in tail gas after biological fuel gas burning is realized, set without extra increase desulfurization and denitration
It is standby, greatly reduce the operating cost using enterprise and investment.
The present invention substantially increases system operation using biomass gasification technology and stable boiler turbine electrification technique
Stability.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
In figure：1st, gasification system, 101, feeding device, 102, primary air nozzle, 103, furnace roof, 104, main shaft, 105, material toggling
Device, 106, overfiren air port, 107, middle body of heater, 108, fire grate, 109, fire grate support, 110, lower furnace body, 111, go out charcoal device,
112nd, it is pyrolyzed gas outlet, 113, pyrolysis combustion gas blower fan, 114, gasification burning outlet, 115, cyclone separator, 116, little gear,
117th, charcoal conveying fan, 118, gasification burning blower fan, 2, electricity generation system, 201, gas combustion chamber, 202, desulfurization chamber, 203, air
Preheater, 204, boiler heating surface, 205, tail gas treating unit, 206, air blower, 207, waterworks, 208, ammonia device,
209th, steam turbine, 210, generator.
Embodiment
In order that technological means, creation characteristic, workflow, application method reached purpose and effect of the present invention are easy to bright
It is white to understand, below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
As shown in figure 1, a kind of downdraft fixed bed gasification steam-electric power combined production device, including：Gasification system 1, generate electricity system
System 2, the electricity generation system 2 drive work by gasification system 1, the gasification system 1 include furnace roof 103, middle body of heater 107, under
Body of heater 110, the middle body of heater 107 are arranged on lower furnace body 110, and lower furnace body 110 is arranged on base, on middle body of heater 107
Furnace roof 103 is installed, feeding device 101, primary air nozzle 102 are installed on the furnace roof 103, the middle side of body of heater 107 is provided with
Overfiren air port 106, opposite side are provided with pyrolysis gas outlet 112, and main shaft 104 is provided with middle body of heater 107, and the upper end of main shaft 104 connects
Be connected to power set, lower end is provided with setting gauge 105, is provided with fire grate 108, fire grate in the lower furnace body 110 of the downside of setting gauge 105
108 are arranged in lower furnace body 110 by fire grate support 109, and the bottom of lower furnace body 110 is provided with out charcoal device 111, the pyrolysis combustion
Gas outlet 112 is connected to electricity generation system 2 by being pyrolyzed combustion gas blower fan 113, and the side of lower furnace body 110 exports provided with gasification burning
114, gasification burning outlet 114 is connected to gasification burning blower fan 118 by cyclone separator 115, and gasification burning blower fan 118 connects
In electricity generation system 2.
The electricity generation system 2 includes gas combustion chamber 201, and gas combustion chamber 201 is connected with pyrolysis combustion gas blower fan 113, gas
Change combustion gas blower fan 118, import phase of the bottom carbon outlet port of cyclone separator 115 through pipeline with desulfurization chamber 202 and charcoal conveying fan 117
Connection, desulfurization chamber 202 is interior to be provided with air preheater 203, boiler heating surface 204, and the top of desulfurization chamber 202 is connected with vent gas treatment dress
205 are put, middle body of heater 107 is connected through pipeline with the low pressure (LP) cylinder of steam turbine 209, middle body of heater 107 and the low pressure (LP) cylinder of steam turbine 209
Between pipeline be provided with the ammonia device 208 that is connected with this pipeline, generator 210 is installed on steam turbine 209.
Air blower 206 is connected with the air preheater 203, is connected with waterworks 207 on boiler heating surface 204.
The side of fire grate 108 is connected with motor by little gear 116.
A kind of production technology based on downdraft fixed bed gasification steam-electric power combined production device, it is characterised in that：Including with
Lower step：
(1) biomass material is added by feeding device 101 from furnace roof 103, and the First air needed for material gasification is by First air
Mouth 102 is inhaled into, and pyrolysis gasification occurs in middle body of heater 107 under the radiation effects of high-temperature material with air for biomass material
Reaction, biomass high temperature pyrolysis combustion gas and charcoal, high temperature pyrolysis combustion gas of the generation containing higher tar content are pyrolyzed combustion gas wind
Machine 113 is sent to gas combustion chamber 201 by extraction in the middle part of gasification furnace and burnt, Secondary Air and carrying ammonia for charcoal activation
Vapor is entered by middle body of heater 107, reacts to obtain the nitrogenous activated carbon and gasification burning that possess desulfurization characteristic with charcoal, by
The nitrogenous activated carbon that the gasification burning that gasification furnace bottom is extracted out carries powdery realizes gas solid separation, gas in cyclone separator 115
Change combustion gas is delivered to gas combustion chamber 201 by gasification burning blower fan 118 and burnt；The nitrogenous activated carbon of powdery is sent to desulfurization chamber 202 and used
The desulfurization of tail gas after fuel gas buring in gas combustion chamber 201.Block nitrogenous activated carbon goes out charcoal device by the furnace bottom that gasifies
111 discharges；
(2) high temperature pyrolysis combustion gas is entered by the top of gas combustion chamber 201, with the air after the preheating of air preheater 203
Burnt after mixing, by controlling the air amount of feeding, it is reproducibility atmosphere to realize the top combustion zone of gas combustion chamber 201, suppression
NO_x formation processed.The air sprayed into simultaneously at the middle part of gas combustion chamber 201 after the preheating of air preheater 203, realizes combustion
Combustion gas is completely burned off in combustion chamber 201 and keeps certain oxygen content, and the bottom of gas combustion chamber 201, which sprays into, contains high score
The high temperature pyrolysis combustion gas of sub- tar, realize that nitrogen oxides in effluent reduces using the reproducibility of macromolecule tar；
(3) after caused high-temperature flue gas passes sequentially through boiler heating surface 204, air preheater 203 in gas combustion chamber 201
Into desulfurization chamber 202, boiler heating surface 204 produces superheated steam, and superheated steam enters the acting of steam turbine 209 and generated electricity, partly does
Steam after work(is sent into middle body of heater after being blended by the ammonia that the low pressure (LP) cylinder of steam turbine 209 is drawn and is provided with ammonia device 208
107 carry out charcoal activation；
(4) flue gas entered in desulfurization chamber 202 blends with the nitrogenous activated carbon of powdery, and the sulfur dioxide in flue gas is by activated carbon
Adsorption and oxidation, removed from flue gas, the dust in powdered activated carbon and flue gas discharges after being removed by tail gas treating unit 205, cigarette
Gas realizes qualified discharge.
Embodiment 1
Almond husk as raw material is added by feeding device 101 from furnace roof 103, and the First air needed for Pericarppium Armeniacae Amarum gasification is by primary air nozzle
102 are inhaled into, and pyrolysis gasification reaction occurs in middle body of heater 107 under the radiation effects of high-temperature material with air for Pericarppium Armeniacae Amarum,
Biomass high temperature pyrolysis combustion gas and charcoal, 330 DEG C of pyrolysis combustion gas of the generation containing higher tar content are pyrolyzed combustion gas blower fan
113 are sent to gas combustion chamber 201 by extraction in the middle part of gasification furnace burns.For the Secondary Air of charcoal activation and the water of carrying ammonia
Steam is entered by middle body of heater 107, and the mass ratio of Pericarppium Armeniacae Amarum and ammonia is 260kg/kg, react to obtain with charcoal possess it is de-
The nitrogenous activated carbon and gasification burning of sulphur property.460 DEG C of the gasification burning extracted out by gasification furnace bottom carries the nitrogenous of powdery
Activated carbon realizes gas solid separation in cyclone separator 115, and gasification burning delivers to gas combustion chamber by gasification burning blower fan 118
201 burnings, fuel gas buring in-furnace temperature are 750 DEG C, and the mass ratio of gasification burning and pyrolysis combustion gas is 0.9kg/kg；Powdery contains
Nitrogen activated carbon is sent to the desulfurization that desulfurization chamber 202 is used for tail gas after fuel gas buring in gas combustion chamber 201, the temperature of desulfurization chamber 202
Spend for 130 DEG C.Block nitrogenous activated carbon is discharged by the charcoal device 111 that goes out for the furnace bottom that gasifies, the iodine sorption value value of activated carbon
1200mg/g, phosphorus content 91.5%.High temperature pyrolysis combustion gas is entered by the top of gas combustion chamber 201, and pre- through air preheater 203
Burnt after air mixing after heat, by controlling the air amount of feeding, realize the top combustion zone of gas combustion chamber 201 for reduction
Property atmosphere, suppress NO_x formation.The sky sprayed into simultaneously at the middle part of gas combustion chamber 201 after the preheating of air preheater 203
Gas, realize that combustion gas is completely burned off in gas combustion chamber 201 and keep certain oxygen content, the bottom of gas combustion chamber 201 sprays into
High temperature pyrolysis combustion gas containing macromolecule tar, realize that nitrogen oxides in effluent reduces using the reproducibility of macromolecule tar.Combustion
Caused high-temperature flue gas enters desulfurization chamber after passing sequentially through boiler heating surface 204, air preheater 203 in combustion chamber 201
202, the generation temperature of boiler heating surface 204 is 450 DEG C, the superheated steam that pressure is 3.82MPa, and superheated steam enters steam turbine
209 acting generate electricity, the generated output of steam turbine be 3MW, part do work after steam by steam turbine 209 low pressure (LP) cylinder extraction and with
Body of heater 107 carries out charcoal activation among being sent into after the ammonia blending that ammonia device 208 provides.Cigarette into desulfurization chamber 202
Gas blends with the nitrogenous activated carbon of powdery, and the sulfur dioxide in flue gas is tightly held by activated carbon oxidation, is removed from flue gas.It is powdered activated
Dust in charcoal and flue gas discharges after being removed by tail gas treating unit 205, and the concentration of the sulfur dioxide in tail gas of discharge is 25mg/
Nm3, nitrogen oxides concentration be 111mg/Nm3, particulate matter concentration of emission be 21mg/Nm3。
Embodiment 2
Coconut husk raw material is added by feeding device 101 from furnace roof 103, and the First air needed for coconut husk gasification is by primary air nozzle 102
It is inhaled into, pyrolysis gasification reaction occurs in middle body of heater 107 under the radiation effects of high-temperature material with air for coconut husk, and generation contains
The biomass high temperature pyrolysis combustion gas of higher tar content and charcoal, high temperature pyrolysis combustion gas are pyrolyzed combustion gas blower fan 113 by gasifying
Extraction is sent to gas combustion chamber 201 and burnt in the middle part of stove.For the Secondary Air of charcoal activation and the vapor of carrying ammonia in
Between body of heater 107 enter, the mass ratio of coconut husk and ammonia is 350kg/kg, reacts to obtain with charcoal and possesses containing for desulfurization characteristic
Nitrogen activated carbon and gasification burning.The 520 DEG C of gasification burnings extracted out by gasification furnace bottom carry the nitrogenous activated carbon of powdery in whirlwind
Gas solid separation is realized in separator 115, gasification burning is delivered to gas combustion chamber 201 by gasification burning blower fan 118 and burnt, combustion gas combustion
It is 860 DEG C to burn in-furnace temperature, and the mass ratio of gasification burning and pyrolysis combustion gas is 1.2kg/kg；The nitrogenous activated carbon of powdery is sent to
Desulfurization chamber 202 is used for the desulfurization of tail gas after fuel gas buring in gas combustion chamber 201, and the temperature of desulfurization chamber 202 is 155 DEG C.It is block
Nitrogenous activated carbon is discharged by the charcoal device 111 that goes out for the furnace bottom that gasifies, the iodine sorption value value 1251mg/g of activated carbon, phosphorus content
92.4%.High temperature pyrolysis combustion gas is entered by the top of gas combustion chamber 201, is mixed with the air after the preheating of air preheater 203
After burnt, by controlling the air amount of feeding, it is reproducibility atmosphere to realize the top combustion zone of gas combustion chamber 201, suppress nitrogen
Oxide generates.The air sprayed into simultaneously at the middle part of gas combustion chamber 201 after the preheating of air preheater 203, realize that combustion gas is fired
The oxygen content that combustion gas is completely burned off in room 201 and holding is certain is burnt, the bottom of gas combustion chamber 201, which sprays into, contains macromolecule tar
High temperature pyrolysis combustion gas, using the reproducibility of macromolecule tar realize nitrogen oxides in effluent reduce.Produced in gas combustion chamber 201
Raw high-temperature flue gas enters desulfurization chamber 202, boiler heating surface 204 after passing sequentially through boiler heating surface 204, air preheater 203
Generation temperature is 450 DEG C, the superheated steam that pressure is 3.82MPa, and superheated steam enters the acting of steam turbine 209 and generated electricity, steam turbine
Generated output be 6MW, the steam after part is done work is drawn by the low pressure (LP) cylinder of steam turbine 209 and provided with ammonia device 208
Body of heater 107 carries out charcoal activation among being sent into after ammonia blending.Into the flue gas in desulfurization chamber 202 and the nitrogenous activated carbon of powdery
Blend, the sulfur dioxide in flue gas is tightly held by activated carbon oxidation, is removed from flue gas.Dust quilt in powdered activated carbon and flue gas
Tail gas treating unit 205 discharges after removing, and the concentration of the sulfur dioxide in tail gas of discharge is 16mg/Nm3, nitrogen oxides concentration
For 83mg/Nm3, particulate matter concentration of emission be 18mg/Nm3。
Embodiment 3
Wood raw material is added by feeding device 101 from furnace roof 103, and the First air needed for wood chip gasification is by primary air nozzle 102
It is inhaled into, pyrolysis gasification reaction occurs in middle body of heater 107 under the radiation effects of high-temperature material with air for wood chip, and generation contains
The biomass high temperature pyrolysis combustion gas of higher tar content and charcoal, high temperature pyrolysis combustion gas are pyrolyzed combustion gas blower fan 113 by gasifying
Extraction is sent to gas combustion chamber 201 and burnt in the middle part of stove.For the Secondary Air of charcoal activation and the vapor of carrying ammonia in
Between body of heater 107 enter, the mass ratio of coconut husk and ammonia is 370kg/kg, reacts to obtain with charcoal and possesses containing for desulfurization characteristic
Nitrogen activated carbon and gasification burning.The 420 DEG C of gasification burnings extracted out by gasification furnace bottom carry the nitrogenous activated carbon of powdery in whirlwind
Gas solid separation is realized in separator 115, gasification burning is delivered to gas combustion chamber 201 by gasification burning blower fan 118 and burnt, combustion gas combustion
It is 870 DEG C to burn in-furnace temperature, and the mass ratio of gasification burning and pyrolysis combustion gas is 1.6kg/kg；；The nitrogenous activated carbon of powdery is sent
It is used for the desulfurization of tail gas after fuel gas buring in gas combustion chamber 201 to desulfurization chamber 202, the temperature of desulfurization chamber 202 is 138 DEG C.Block
The nitrogenous activated carbon of shape is discharged by the charcoal device 111 that goes out for the furnace bottom that gasifies, the iodine sorption value value 986mg/g of activated carbon, phosphorus content
89.3%.High temperature pyrolysis combustion gas is entered by the top of gas combustion chamber 201, is mixed with the air after the preheating of air preheater 203
After burnt, by controlling the air amount of feeding, it is reproducibility atmosphere to realize the top combustion zone of gas combustion chamber 201, suppress nitrogen
Oxide generates.The air sprayed into simultaneously at the middle part of gas combustion chamber 201 after the preheating of air preheater 203, realize that combustion gas is fired
The oxygen content that combustion gas is completely burned off in room 201 and holding is certain is burnt, the bottom of gas combustion chamber 201, which sprays into, contains macromolecule tar
High temperature pyrolysis combustion gas, using the reproducibility of macromolecule tar realize nitrogen oxides in effluent reduce.Produced in gas combustion chamber 201
Raw high-temperature flue gas enters desulfurization chamber 202, boiler heating surface 204 after passing sequentially through boiler heating surface 204, air preheater 203
Generation temperature is 450 DEG C, the superheated steam that pressure is 3.82MPa, and superheated steam enters the acting of steam turbine 209 and generated electricity, steam turbine
Generated output be 6MW, the steam after part is done work is drawn by the low pressure (LP) cylinder of steam turbine 209 and provided with ammonia device 208
Body of heater 107 carries out charcoal activation among being sent into after ammonia blending.Into the flue gas in desulfurization chamber 202 and the nitrogenous activated carbon of powdery
Blend, the sulfur dioxide in flue gas is tightly held by activated carbon oxidation, is removed from flue gas.Dust quilt in powdered activated carbon and flue gas
Tail gas treating unit 205 discharges after removing, and the concentration of the sulfur dioxide in tail gas of discharge is 38mg/Nm3, nitrogen oxides concentration
For 124mg/Nm3, particulate matter concentration of emission be 29mg/Nm3。
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the present invention by appended claims and
Its equivalent thereof.
Claims (8)
1. a kind of downdraft fixed bed gasification steam-electric power combined production device, including：Gasification system, electricity generation system, it is characterised in that：
The electricity generation system drives work by gasification system, and the gasification system includes furnace roof, middle body of heater, lower furnace body, the centre
Body of heater is arranged on lower furnace body, and lower furnace body is arranged on base, and furnace roof is provided with middle body of heater, is provided with and is added on the furnace roof
Expect device, primary air nozzle, middle body of heater side is provided with overfiren air port, opposite side is provided with pyrolysis gas outlet, is set in intermediate furnace body
There is main shaft, main shaft upper end is connected to power set, lower end is provided with setting gauge, and fire grate is provided with the lower furnace body on the downside of setting gauge,
Fire grate is arranged in lower furnace body by fire grate support, and lower furnace body bottom is provided with out charcoal device, and the pyrolysis gas outlet passes through
Pyrolysis combustion gas blower fan is connected to electricity generation system, and the lower furnace body side exports provided with gasification burning, and gasification burning outlet passes through rotation
Wind separator is connected to gasification burning blower fan, and gasification burning blower fan is connected to electricity generation system；The electricity generation system is fired including combustion gas
Room is burnt, gas combustion chamber is connected with pyrolysis combustion gas blower fan, gasification burning blower fan, and cyclone separator bottom carbon outlet port is through pipeline with taking off
The import of sulphur room and charcoal conveying fan is connected, and air preheater, boiler heating surface are provided with desulfurization chamber, is connected at the top of desulfurization chamber
Have exhaust gas processing device, middle body of heater is connected through pipeline with the low pressure (LP) cylinder of steam turbine, middle body of heater and turbine low pressure cylinder it
Between pipeline be provided with the ammonia device that is connected with this pipeline, generator is installed on steam turbine.
A kind of 2. downdraft fixed bed gasification steam-electric power combined production device according to claim 1, it is characterised in that：It is described
Air blower is connected with air preheater, is connected with waterworks on boiler heating surface.
A kind of 3. downdraft fixed bed gasification steam-electric power combined production device according to claim 1, it is characterised in that：It is described
Fire grate side is connected with motor by little gear.
A kind of 4. production technology based on downdraft fixed bed gasification steam-electric power combined production device, it is characterised in that：Including following
Step：
(1) biomass material is added by feeding device from furnace roof, and the First air needed for material gasification is inhaled into by primary air nozzle, raw
Pyrolysis gasification reaction occurs in intermediate furnace body under the radiation effects of high-temperature material with air for raw material of substance, and generation contains higher Jiao
The biomass high temperature pyrolysis combustion gas of oil content and charcoal, high temperature pyrolysis combustion gas are pyrolyzed combustion gas blower fan by being extracted out in the middle part of gasification furnace
Gas combustion chamber's burning is sent to, is entered for the Secondary Air of charcoal activation and the water vapour of carrying ammonia by middle body of heater, with
Charcoal reacts to obtain the nitrogenous activated carbon and gasification burning that possess desulfurization characteristic, and the gasification burning extracted out by gasification furnace bottom is taken
Nitrogenous activated carbon with powdery realizes gas solid separation in cyclone separator, and gasification burning delivers to gas combustion chamber by combustion gas blower fan
Burning；The nitrogenous activated carbon of powdery is sent to the desulfurization that desulfurization chamber is used for tail gas after fuel gas buring indoor fuel gas burns, block nitrogenous
Activated carbon is discharged by the charcoal device that goes out for the furnace bottom that gasifies；
(2) high-temperature gasification combustion gas is carried out by entering at the top of gas combustion chamber after being mixed with the air after air preheater preheats
Burning, by controlling the air amount of feeding, it is reproducibility atmosphere to realize gas combustion chamber top combustion zone, suppresses nitrogen oxides life
Into, while the air after air preheater preheats is sprayed into the middle part of gas combustion chamber, realize that fuel gas buring indoor fuel gas is complete
After-flame and certain oxygen content is kept, the bottom of gas combustion chamber sprays into the high temperature pyrolysis combustion gas containing macromolecule tar, utilizes
The reproducibility of macromolecule tar realizes that nitrogen oxides in effluent reduces；
(3) caused high-temperature flue gas enters desulfurization chamber after passing sequentially through boiler heating surface, air preheater in fuel gas buring room, leads to
Cross boiler heating surface and produce superheated steam, superheated steam enters steam turbine acting and generated electricity, and the steam after partly doing work is by steam turbine
Low pressure (LP) cylinder draw and with ammonia device provide ammonia blending after be sent among body of heater carry out charcoal activation；
(4) flue gas entered in desulfurization chamber blends with the nitrogenous activated carbon of powdery, and the sulfur dioxide in flue gas is tightly held by activated carbon oxygen
Change, removed from flue gas, the dust in powdered activated carbon and flue gas discharges after being removed by tail gas treating unit, and flue gas is realized up to standard
Discharge.
5. a kind of production technology based on downdraft fixed bed gasification steam-electric power combined production device according to claim 4,
It is characterized in that：The mass ratio of the biomass and ammonia is 100~500kg/kg.
6. a kind of production technology based on downdraft fixed bed gasification steam-electric power combined production device according to claim 4,
It is characterized in that：The desulfurization room temperature is 80~200 DEG C.
7. a kind of production technology based on downdraft fixed bed gasification steam-electric power combined production device according to claim 4,
It is characterized in that：The outlet temperature of the pyrolysis combustion gas is 200~400 DEG C, and gasification burning outlet temperature is 400~600 DEG C.
8. a kind of production technology based on downdraft fixed bed gasification steam-electric power combined production device according to claim 4,
It is characterized in that：The fuel gas buring in-furnace temperature is 700-1300 DEG C, and the mass ratio of gasification burning and pyrolysis combustion gas is 0.5
~3kg/kg.
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