CN206970547U - Biomass double bed gasification and pyrolysis coupled electricity-generation system - Google Patents
Biomass double bed gasification and pyrolysis coupled electricity-generation system Download PDFInfo
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- CN206970547U CN206970547U CN201720604118.4U CN201720604118U CN206970547U CN 206970547 U CN206970547 U CN 206970547U CN 201720604118 U CN201720604118 U CN 201720604118U CN 206970547 U CN206970547 U CN 206970547U
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Abstract
The utility model provides a kind of biomass double bed gasification and pyrolysis coupled electricity-generation system, including：For the biomass material of collection to be stored, and the biomass storage supply unit conveyed after cutting and crushing；For the biomass material after cutting and crushing to be gasified, and discharge the Biomass Gasification in Circulating Fluidized Bed unit of raw gas；For utilizing the biomass pyrolytic endothermic reaction, by the biomass pyrolytic unit of raw gas cooling；For to the raw gas accurate measurement after cooling, while overcome on-way resistance to be sent to coal-burning boiler and carry out stablizing burning, to substitute the raw gas of a part of coal-fired load metering blowing unit and supporting fuel element.The system is using gasification of biomass, pyrolysis, the coupling for three processes of burning, it is fuel gas by recirculating fluidized bed gasification conversion of biomass, and fuel gas is cooled in fixed-bed pyrolysis stove and improves combustion gas quality, finally burning substitutes part raw coal in coal-burning boiler, and biomass is efficiently make use of while saving coal-fired.
Description
Technical field
A kind of biomass double bed gasification-pyrolysis coupling electricity generation system is the utility model is related to, belongs to biomass processes technology
Field.
Background technology
Energy problem and environmental problem are two significant problems of global facing, with conventional energy resource coal, oil, day
The exploitation depletion rate lifting of the fossil energies such as right gas, these energy are gradually consumed, and the consumption of traditional fossil energy is to environment
Influence gradually show, EI Nino phenomenon frequently aggravates to influence, and polar glacier ablation, ecological environment chooses by unprecedented
War.Chinese Government promises to undertake that accounting for primary energy consumption proportion to the year two thousand twenty non-fossil energy is up to 15% or so, unit to the world
GDP CO2 emission declined 40%~45% than 2005, and CO2 emission peak value is reached in the year two thousand thirty,
Primary energy consumption proportion, which is accounted for, to the year two thousand thirty non-fossil energy is up to 20% or so, unit GDP carbon dioxide row
Put and declined 60%~65% than 2005.Therefore, under such integrated environment, the utilization of renewable resource is with environmental protection
Fast development is arrived in the lifting of consciousness, is the important channel for promoting energy supply diversification and cleaning development.
Biomass has the spy that resource abundance, Regional Distribution are wide and energy reserves are stable as renewable resource
Point.Utilization to biomass both at home and abroad mainly uses the modes such as directly burning, pyrolysis, but because biomass energy density is relative
It is relatively low, the features such as high-moisture, high volatile and high basic metal content, directly burn easy slagging, coking.And biomass pyrolytic mistake
The release of journey volatile matter is mainly come out in the form of tar, can carry out tar deep processing liquefaction product, but biomass pyrolytic residue
Still there is higher calorific value, energy utilization is insufficient.Biomass was once being risen in the country and coal is mixed burning and generated electricity, but due to biomass
Slagging coking property, cause boiler part coking operating mode to occur, influence the output and normal operation of coal-burning boiler.It is in addition, biological
First the gasify technology of after-combustion generating of matter had obtained certain industrialization demonstration in recent years, and achieved greater advance, such as state
Electric Jingmen power plant, using biomass fluid bed gasification day processing biomass about 200t/d, synthesis gas is after cooling with drawing after gasification
Blower fan is sent into 600MW grades coal-burning boiler and fires realization generating again, can reduce former coal-burning boiler coal consumption, biomass gasification fired generating
Equivalent generated energy is about 8MW.But the project was built since 2008, last 8 years or so and just gradually realize normal operation,
Gasification of biomass raw gas cooling procedure complexity is primarily due to, technique controlling difficulty is larger, and gasification of biomass raw gas is cooling down
During tar the normal operation for influenceing heat transmission equipment and blower fan such as separate out, the stability of a system and reliability need further to be carried
It is high.
In summary, gasification of biomass-combustion power generation technology has turned into the important development direction of biomass economy, but such as
What realize gasification of biomass and combustion process coupled problem be also pendulum in face of engineer applied across a not past ridge.
Utility model content
The technical problems to be solved in the utility model is how to realize the high-efficiency cleaning gasification of biomass, and will be thick after gasification
Coal gas is sent into coal-fired boiler combustion in a manner of measurable, and it is coal-fired negative that a part is substituted in the case of coal-burning boiler system is not influenceed
Lotus, and biomass power generation is realized indirectly.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is to provide a kind of biomass double bed gasification-heat
Decoupling electricity generation system, it is characterised in that：Including
For by the biomass material of collection carry out it is regular after store, and by biomass material cutting and crushing to setting particle diameter
The biomass storage supply unit conveyed afterwards；
Gasified for biomass storage supply unit to be conveyed into the biomass material come, and discharge the biology of raw gas
Matter recirculating fluidized bed gasification unit；
For utilizing the biomass pyrolytic endothermic reaction, the raw gas that Biomass Gasification in Circulating Fluidized Bed unit is discharged cools
Biomass pyrolytic unit；
Raw gas for being discharged to biomass pyrolytic unit carries out accurate measurement, while overcomes on-way resistance to be sent to
Coal-burning boiler carries out stablizing burning, single to substitute the raw gas of a part of coal-fired load metering blowing unit and supporting burning
Member；
The biomass storage supply unit, Biomass Gasification in Circulating Fluidized Bed unit, biomass pyrolytic unit, raw gas
Metering blowing unit and supporting fuel element are sequentially connected.
Preferably, the biomass storage supply unit includes biomass warehouse, and cutting breaking is located at biomass warehouse
Lower section, for hopper below cutting breaking, hopper connects raw material cabin by belt conveyor, and feed hopper is located at below raw material cabin,
For first frequency conversion screw(-type) feeder below feed hopper, the outlet of the first frequency conversion screw(-type) feeder connects the biomass circulating fluid
Bed gasification unit.
Preferably, the Biomass Gasification in Circulating Fluidized Bed unit includes circle fluidized-bed gasification furnace, the biomass storage
Deposit supply unit outlet connection circle fluidized-bed gasification furnace；Pressure fan connects circle fluidized-bed gasification furnace bottom by air supply duct
Portion, circle fluidized-bed gasification furnace bottom are provided with air distribution plate；Connection cyclone separator air inlet at the top of circle fluidized-bed gasification furnace；Rotation
The particulate matter outlet of wind separator connects circle fluidized-bed gasification furnace lower end by the first feed back unit；The gas of cyclone separator
Outlet connects the biomass pyrolytic unit.
Preferably, the first feed back unit includes the first feed back leg and the first material returning device, the particulate matter of cyclone separator
The first feed back leg of outlet connection, the first feed back leg connect circle fluidized-bed gasification furnace lower end by the first material returning device.
Preferably, the circle fluidized-bed gasification furnace bottom is provided with scum pipe, and screw cinder cooling apparatus is below scum pipe, spiral shell
Slag bath is provided with below rotation lag cooler.
Preferably, the biomass pyrolytic unit includes feedstock vessel, and the second frequency conversion screw(-type) feeder is located at below feedstock vessel,
Second frequency conversion screw(-type) feeder exports the biomass inlet at the top of a pyrolysis oven that is connected；The gas of the cyclone separator goes out
Mouth is connected a pyrolysis oven bottom；Fixed-bed pyrolysis furnace bottom connects the recirculating fluidized bed by the second feed back unit and gasified
The side-lower of stove；The raw gas outlet on fixed-bed pyrolysis stove top connects the raw gas metering blowing unit and supporting burning
Unit.
Preferably, the second feed back unit includes the second feed back leg and the second material returning device, and fixed-bed pyrolysis furnace bottom connects
The second material returning device is connect, the second material returning device connects the side-lower of the circle fluidized-bed gasification furnace by the second feed back leg.
Preferably, the raw gas metering blowing unit and supporting fuel element include air-introduced machine, the fixed bed heat
The raw gas outlet for solving stove top exports connection raw gas combustion boiler system by pipeline connection air-introduced machine entrance, air-introduced machine,
Pipeline between the raw gas outlet of the fixed-bed pyrolysis stove and air-introduced machine is provided with raw gas flowmeter.
Preferably, the biomass includes stalk, shell, forestry residue, rice husk, wood chip, and enters biomass circulating
The biomass material moisture content of fluid bed gasification unit is less than 20%.
Preferably, the particle diameter after the biomass material cutting and crushing is less than 100mm.
The utility model additionally provides a kind of biomass double bed gasification-pyrolysis coupling electricity-generating method, using above-mentioned biology
Matter double bed gasification-pyrolysis coupling electricity generation system, it is characterised in that step is：
Step 1：Heat smoke is produced or quoted from raw gas burning pot by circle fluidized-bed gasification furnace base burning fuel gas
The heat smoke of furnace system carries out the baker heating of circle fluidized-bed gasification furnace；
Step 2：The biomass material being stored in biomass warehouse for being less than 20% by drying control moisture, by cutting
Disintegrating machine processing is cut, control biological particles particle diameter is less than 100mm, and is delivered to feed bin by belt conveyor, then by frequency conversion
Formula screw(-type) feeder is conveyed into circle fluidized-bed gasification furnace and fixed-bed pyrolysis stove, is realized and given birth to by VFC screw(-type) feeder
The adjustment of material feeding coal；
Step 3：Air is sent into circle fluidized-bed gasification furnace bottom air distribution plate by pressure fan, realizes biomass circulating fluidized bed
Gasification, while circle fluidized-bed gasification furnace will heat up, by air capacity and biomass feed flux matched adjustment realize it is ciculation fluidized
Temperature control in bed gasification furnace；
Step 4：Caused raw gas is after cyclone separator separates after the gasification of circle fluidized-bed gasification furnace endogenous substance
Fixed-bed pyrolysis stove is removed, raw gas is from bottom to top declined by temperature after the fixed bed bed in fixed-bed pyrolysis stove, and is passed through
Pyrolytic process supplements combustible gas component；The combustible gas component supplemented is incorporated in raw gas；
Step 5：Biomass semicoke caused by fixed-bed pyrolysis process is discharged from fixed bed bottom and is sent into recirculating fluidized bed
Gasification furnace is gasified；
Step 6：Raw gas after fixed-bed pyrolysis cools down is drawn by the metering of raw gas flowmeter and air-introduced machine
Into raw gas combustion boiler system, by raw gas combustion boiler system completely burned, and substitute partial fuel coal and realize indirectly
Generate electricity.
The utility model employs gasification of biomass, pyrolysis, the coupling for three processes of burning, and realizes sending and receiving between biomass
Electricity, it is fuel gas by recirculating fluidized bed gasification conversion of biomass, and fuel gas is cooled and improved in fixed-bed pyrolysis stove
Combustion gas quality, finally burning substitutes part raw coal in coal-burning boiler, efficiently make use of biomass while saving coal-fired, and
Coal-fired boiler NOx discharge is reduced to a certain extent, and application prospect is very wide.
The utility model stable and reliable operation, it is easy to maximization amplification, environmental protection and energy saving, compared with prior art, this practicality is new
Type also has the advantages that：
(1) the utility model is coupled using gasification with pyrolysis coupling, gasification with burning, realizes double coupling process, finally
The purpose of biomass power generation is reached, the biomass as renewable resource realizes cleaning, efficient utilization；
(2) the utility model using pyrolytic process cooling gasification caused by raw gas, solve the cooling of raw gas,
The heat source of pyrolytic process is realized, while effectively improves the combustion gas quality of gasification raw gas, has reached what is achieved many things at one stroke
Purpose；
(3) the utility model biomass realizes biomass indirect burning, overall process is not related to buck by gasification, pyrolysis
With the discharge of flying dust, the secondary pollution of water and dust will not be caused, the overall feature of environmental protection is higher, and system design is compact, overall to throw
Provide low, construction and operation management convenience；
(4) double bed of the gasification of the utility model recirculating fluidized bed and fixed-bed pyrolysis process designs, and solves in fixed bed
Low Temperature Pyrolysis Process thermal source inputs problem and the recycling problem of pyrolysis char, and system energy conversion ratio greatly improves.
(5) fuel gas is reproducibility gas in biomass double bed gasification-pyrolysis coupling electricity generation system described in the utility model
Body, enter coal-fired boiler combustion process and beneficial effect is played to the NOx emission for reducing coal-burning boiler, can reduce to a certain extent total
Body NOx discharge.
Brief description of the drawings
Fig. 1 is biomass double bed gasification-pyrolysis coupling electricity generation system schematic diagram that the present embodiment provides；
Description of reference numerals
1- biomass materials；2- biomass warehouses；3- cutting breakings；4- hoppers；5- belt conveyors；6- raw material cabins；7-
Feed hopper；8- the first frequency conversion screw(-type) feeders；9- circle fluidized-bed gasification furnaces；10-air；11- desalination water inlets；12- spirals
Slag cooler；13- desalination water outs；14- slag baths；15-cyclone separator；The material returning devices of 16- first；17- the first feed back legs；18-
One material returning device fluidized wind；19-the second feed back legs；20- the second material returning device fluidized winds；The material returning devices of 21- second；22- fixed-bed pyrolysis
Stove；23- the second frequency conversion screw(-type) feeders；24- feedstock vessels；25- flowmeters；26- air-introduced machines；27- raw gas burning boilers system
System；28- flue gases；29- bottom ash；30- steam；31- pressure fan.
Embodiment
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In addition, it is to be understood that reading the content of the utility model instruction
Afterwards, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall within this Shen
Please appended claims limited range.
Biomass double bed gasification-pyrolysis coupling electricity generation system schematic diagram that Fig. 1 provides for the present embodiment, described biomass
Double bed gasification-pyrolysis coupling electricity generation system mainly include biomass storage supply unit, Biomass Gasification in Circulating Fluidized Bed unit,
Biomass pyrolytic unit, the raw gas metering equipment such as blowing unit and supporting fuel element.
First, biomass storage supply unit
Biomass storage supply unit is used to the biomass material of collection carrying out regular rear storage, and biomass material passes through
The particle diameter (being less than 100mm) that cutting and crushing reaches certain is sent into Biomass Gasification in Circulating Fluidized Bed unit afterwards.
Biomass storage supply unit mainly includes biomass warehouse 2, cutting breaking 3, hopper 4, belt conveyor 5, original
Feed bin 6, feed hopper 7, the first frequency conversion screw(-type) feeder 8 and ducts instrument.Cutting breaking 3 is located under biomass warehouse 2
Side, hopper 4 are located at the lower section of cutting breaking 3, and hopper 4 connects raw material cabin 6 by belt conveyor 5, and feed hopper 7 is located at raw material cabin 6
Lower section, the first frequency conversion screw(-type) feeder 8 are located at the lower section of feed hopper 7, and the outlet of the first frequency conversion screw(-type) feeder 8 is connected by pipeline gives birth to
Material recirculating fluidized bed gasification unit.
It is stored in by drying biomass material of the control moisture less than 20% in biomass warehouse 2, in biomass warehouse 2
Biomass material 1 first pass around the particle diameter (being less than 100mm) that the cutting and crushing of cutting breaking 3 reaches certain, be then fed into material
In bucket 4, the broken raw material in hopper 4 is transported to raw material cabin 6 by belt 5, and the broken raw material that raw material cabin 6 exports is sent into feed hopper
7, the broken raw material that feed hopper 7 exports is sent into Biomass Gasification in Circulating Fluidized Bed unit by the first frequency conversion screw(-type) feeder 8 and entered
Promoting the circulation of qi.First frequency conversion screw(-type) feeder 8 can realize the adjustment of biomass feeding amount.
2nd, Biomass Gasification in Circulating Fluidized Bed unit
Biomass Gasification in Circulating Fluidized Bed unit mainly includes circle fluidized-bed gasification furnace 9, pressure fan 31, cyclone separator
15th, the first feed back leg 17, the first material returning device 16, air distribution plate, scum pipe, screw cinder cooling device 12 and slag bath 14 etc. form.
First frequency conversion screw(-type) feeder 8 outlet connection circle fluidized-bed gasification furnace 9.Pressure fan 31 is connected by air supply duct
The bottom of circle fluidized-bed gasification furnace 9, the bottom of circle fluidized-bed gasification furnace 9 are provided with air distribution plate.The top of circle fluidized-bed gasification furnace 9 connects
Connect the air inlet of cyclone separator 15；The first feed back leg 17 of particulate matter outlet connection of cyclone separator 15, the first feed back leg 17 are logical
Cross the first material returning device 16 connection circle fluidized-bed gasification furnace 9 lower end；The gas vent connection biomass pyrolytic of cyclone separator 15
Unit.The bottom of circle fluidized-bed gasification furnace 9 is provided with scum pipe, and screw cinder cooling apparatus 12 is below scum pipe, screw cinder cooling apparatus 12
Lower section is provided with slag bath 14.
First material returning device 16 send particle by the first material returning device fluidized wind 18 side of circle fluidized-bed gasification furnace 9
Lower section.
Second material returning device 21 send particle by the second material returning device fluidized wind 20 side of circle fluidized-bed gasification furnace 9
Lower section.
Entered by the base burning fuel gas of circle fluidized-bed gasification furnace 9 generation heat smoke or the heat smoke quoted from coal-burning boiler
The baker heating of row circle fluidized-bed gasification furnace 9, is warming up to 600 DEG C or so.
Air 10 is sent into the air distribution plate of the bottom of circle fluidized-bed gasification furnace 9 by pressure fan 31, realizes biomass circulating fluid
Bed gasification, while circle fluidized-bed gasification furnace 9 will heat up to 700 DEG C or so；Flux matched tune is fed by air capacity and biomass
It is whole, realize temperature control in gasification furnace.
The biomass that first frequency conversion screw(-type) feeder 8 is sent into is under 700 DEG C or so temperature conditionss in bottom air fluidized wind
Effect is lower to gasify, and 0~50kPag of vapor pressure, the raw gas after gasification carries a certain amount of particulate matter secretly and goes out recirculating fluidized bed gasification
Stove 9, and biomass pyrolytic unit is removed after separating particle in the presence of cyclone separator 15, what cyclone separator 15 separated
Particulate matter returns to circle fluidized-bed gasification furnace 9 and regasified by the first feed back leg 17, the first material returning device 16, and lime-ash is from following after gasification
The scum pipe discharge of the bottom of ring fluidized-bed gasification furnace 9, slag bath 14 is removed after the screw cinder cooling apparatus 12 of indirect type cools down.Demineralized water
Enter from the desalination water inlet 11 of screw cinder cooling apparatus 12, discharged from the desalination water out 13 of screw cinder cooling apparatus 12.
The gasification of recirculating fluidized bed 9 using air either oxygen-enriched air or pure oxygen as gasifying agent.
3rd, biomass pyrolytic unit
Biomass pyrolytic unit mainly includes feedstock vessel 24, the second frequency conversion screw(-type) feeder 23, fixed-bed pyrolysis stove 22, the
Two material returning devices 21, the second feed back leg 19.
Second frequency conversion screw(-type) feeder 23 is located at the lower section of feedstock vessel 24, and the outlet of the second frequency conversion screw(-type) feeder 23 is connected
The biomass inlet at the top of bed pyrolysis oven 22.The gas vent of cyclone separator 15 is connected the bottom of a pyrolysis oven 22.It is fixed
Bed pyrolysis oven 22 bottom connects the second material returning device 21, and the second material returning device 21 connects biomass circulating fluid by the second feed back leg 19
The side-lower of the circle fluidized-bed gasification furnace 9 of bed gasification unit.The raw gas outlet connection rough coal on the top of fixed-bed pyrolysis stove 22
Gas measures blowing unit and supporting fuel element.
Biomass in feedstock vessel 24 is sent into fixed-bed pyrolysis stove 22 by the second frequency conversion screw(-type) feeder 23, recycle stream
Change after 700 DEG C of raw gas after bed gasification furnace 9 gasifies separate particle in the presence of cyclone separator 15 and be also fed into fixed bed heat
Solve in stove 22, be pyrolyzed using the pyrolysis endothermic reaction of the biomass in fixed-bed pyrolysis stove 22 in fixed bed, by rough coal
Gas is from 700 DEG C of greenhouse coolings to 450 DEG C or so.Meanwhile caused pyrolysis gas is mainly CH in pyrolytic process4、C2H6、CO、
H2The fuel gas such as O, and a small amount of gaseous state tar, be fully incorporated gone in raw gas downstream raw gas measure blowing unit with
And supporting fuel element, now the calorific value of pyrolysis gas will be greatly improved.Biomass semicoke caused by biomass pyrolysis process
Discharged from fixed bed bottom, following for Biomass Gasification in Circulating Fluidized Bed unit is gone by the second material returning device 21, the second feed back leg 19
Ring fluidized-bed gasification furnace 9 gasifies.
The operation temperature of fixed-bed pyrolysis stove 22 is 400 DEG C~500 DEG C, belongs to low temperature pyrogenation endothermic process.Cyclonic separation
The raw gas that device 15 exports from bottom to top is down to 450 DEG C or so by temperature after fixed bed bed, and is supplemented by pyrolytic process
A large amount of combustible gas components.The operation temperature of fixed-bed pyrolysis stove 22 is adjusted control by the second frequency conversion of furnace roof batcher 23
System.
4th, raw gas metering blowing unit and supporting fuel element
Raw gas, which measures blowing unit and supporting fuel element, mainly includes raw gas flowmeter 25, air-introduced machine 26, thick
Gas-fired steam generator system 27 etc..
The raw gas outlet on the top of fixed-bed pyrolysis stove 22 of biomass pyrolytic unit enters by pipeline connection air-introduced machine 26
Mouthful, the outlet of air-introduced machine 26 connection raw gas combustion boiler system 27, raw gas outlet and the air-introduced machine 26 of fixed-bed pyrolysis stove 22
Between pipeline on be provided with raw gas flowmeter 25.
Raw gas after the pyrolysis cooling of fixed-bed pyrolysis stove 22 passes through air inducing after the metering of raw gas flowmeter 25
Being drawn into raw gas combustion boiler system 27 for machine 26, passes through gas burner completely burned, and substitute part in the boiler
Fire coal realizes indirect power generation.
Raw gas measures blowing unit and supporting fuel element is mainly used in the accurate measurement of gasification of biomass raw gas,
And on-way resistance is overcome to carry out stablizing burning by raw gas feeding raw gas combustion boiler system.Heat is by pot caused by burning
Stove sorption enhanced is the heat energy of steam 30, and raw gas is converted into flue gas 28, and a small amount of bottom ash 29 after burning.
In biomass double bed gasification-pyrolysis coupling electricity generation system that the present embodiment provides, biomass mainly includes stalk, fruit
Shell, forestry residue, rice husk, wood chip etc., and the raw aqueous rate required into gasification system is less than 20%.
Circle fluidized-bed gasification furnace 9, cyclone separator 15, feed back leg, material returning device and fixed-bed pyrolysis stove 22 are using resistance to
Fiery abrasionproof inner lining material design, can effectively avoid abrasion and etching problem.
There is no biomass fly ash emission, all biomass ashs in whole biomass double bed gasification-pyrolysis coupling power generation process
Gasification bottom ash discharge circle fluidized-bed gasification furnace is respectively formed, in general realizes gasification of biomass and pyrolysis classification process, and
It is used to generate electricity with producing high heating value combustion gas, realizes biomass double bed gasification-pyrolysis coupling and generate electricity.
Below by taking biomass double bed gasification-pyrolysis coupling electricity generation system of a set of day 200 tons of sludge quantity of processing as an example.Biology
Matter uses maize straw.The design parameter of gasification-pyrolytic reaction device is as follows：
Match fuel gas generated output：10MW
It is aqueous to feed biomass：20%；
Feed biological particles particle diameter：＜ 100mm；
Recirculating fluidized bed gasification temperature：700℃；
Fixed-bed pyrolysis furnace temperature：455℃；
Operating pressure：10kPa；
Fuel value：3000~3390kCal/kg；
Sparking mode：Fuel ignition under circle fluidized-bed gasification furnace bed
Gasifying agent：Normal temperature air.
After processing
Total gasification efficiency：81.5%；
Raw gas goes ignition temperature：450℃；
Calorific value of fuel gas：~5500kJ/Nm3；
Dust content in combustion gas：5g/Nm3；
Tar content in combustion gas：20g/Nm3；
Go combustion gas amount：22000Nm3/h。
It can be drawn from data above, the utility model patent is generated electricity using biomass double bed gasification-pyrolysis coupling and designed,
The safety and stability that gasification of biomass, pyrolysis and overall process of burning still are realized in biomass material variation condition is high-quality for a long time
Change design, wherein not being related to fly ash emission and sewage discharge, environment friendly is very high, compared with biomass direct combustion power generation, has
Effect, which avoids biomass combustion, causes Boiler Furnace slagging risk, and will to largely effect on coal-burning boiler whole for the fluctuation of biomass combustion process
Body performance；Compared with the biomass fluid bed gasification of simple subprogram and fixed bed gasification, the design of the utility model double bed can improve heat
Efficiency more than 10%, under the premise of especially producing same quality combustion gas, the biological quality of unit gas consumption reduces by more than 10%,
System investments decline 5%.
In summary, the utility model patent has obvious technological innovation advantage, suitable for focusing on for biomass,
Indirect biomass power generation is realized after being matched with power plant, i.e., is generated electricity as reproducible biomass resource, application prospect is very
It is wide.
Claims (8)
- A kind of 1. biomass double bed gasification-pyrolysis coupling electricity generation system, it is characterised in that：IncludingFor the biomass material of collection to be carried out into regular rear storage, and biomass material cutting and crushing is laggard to particle diameter is set The biomass storage supply unit of row conveying；Gasified for biomass storage supply unit to be conveyed into the biomass material come, and the biomass for discharging raw gas is followed Ring fluid bed gasification unit；For utilizing the biomass pyrolytic endothermic reaction, the life for the raw gas cooling that Biomass Gasification in Circulating Fluidized Bed unit is discharged Material pyrolysis unit；Raw gas for being discharged to biomass pyrolytic unit carries out accurate measurement, while overcomes on-way resistance to be sent to fire coal Boiler carries out stablizing burning, to substitute the raw gas of a part of coal-fired load metering blowing unit and supporting fuel element；The biomass storage supply unit, Biomass Gasification in Circulating Fluidized Bed unit, biomass pyrolytic unit, raw gas metering Blowing unit and supporting fuel element are sequentially connected.
- A kind of 2. biomass double bed gasification-pyrolysis coupling electricity generation system as claimed in claim 1, it is characterised in that：The life Material Storing and conveying unit includes biomass warehouse (2), and cutting breaking (3) is below biomass warehouse (2), hopper (4) Below cutting breaking (3), hopper (4) connects raw material cabin (6) by belt conveyor (5), and feed hopper (7) is located at raw material cabin (6) lower section, the first frequency conversion screw(-type) feeder (8) is below feed hopper (7), the first frequency conversion screw(-type) feeder (8) outlet connection The Biomass Gasification in Circulating Fluidized Bed unit.
- A kind of 3. biomass double bed gasification-pyrolysis coupling electricity generation system as claimed in claim 1, it is characterised in that：The life Material recirculating fluidized bed gasification unit includes circle fluidized-bed gasification furnace (9), biomass storage supply unit outlet connection Circle fluidized-bed gasification furnace (9)；Pressure fan (31) connects circle fluidized-bed gasification furnace (9) bottom, recycle stream by air supply duct Change bed gasification furnace (9) bottom and be provided with air distribution plate；Connection cyclone separator (15) air inlet at the top of circle fluidized-bed gasification furnace (9)； The particulate matter outlet of cyclone separator (15) connects circle fluidized-bed gasification furnace (9) lower end by the first feed back unit；Whirlwind point Gas vent from device (15) connects the biomass pyrolytic unit.
- A kind of 4. biomass double bed gasification-pyrolysis coupling electricity generation system as claimed in claim 3, it is characterised in that：Described One feed back unit includes the first feed back leg (17) and the first material returning device (16), the particulate matter outlet connection of cyclone separator (15) the One feed back leg (17), the first feed back leg (17) connect circle fluidized-bed gasification furnace (9) lower end by the first material returning device (16).
- A kind of 5. biomass double bed gasification-pyrolysis coupling electricity generation system as claimed in claim 3, it is characterised in that：It is described to follow Ring fluidized-bed gasification furnace (9) bottom is provided with scum pipe, and screw cinder cooling apparatus (12) is below scum pipe, under screw cinder cooling apparatus (12) Side is provided with slag bath (14).
- 6. a kind of biomass double bed gasification-pyrolysis coupling electricity generation system as any one of claim 3 to 5, its feature It is：The biomass pyrolytic unit includes feedstock vessel (24), and the second frequency conversion screw(-type) feeder (23) is located under feedstock vessel (24) Side, the second frequency conversion screw(-type) feeder (23) export the biomass inlet at the top of the pyrolysis oven (22) that is connected；The whirlwind point Gas vent from device (15) is connected a pyrolysis oven (22) bottom；Fixed-bed pyrolysis stove (22) bottom passes through the second feed back list Member connects the side-lower of the circle fluidized-bed gasification furnace (9)；The raw gas outlet connection institute on fixed-bed pyrolysis stove (22) top State raw gas metering blowing unit and supporting fuel element.
- A kind of 7. biomass double bed gasification-pyrolysis coupling electricity generation system as claimed in claim 6, it is characterised in that：Described Two feed back units include the second feed back leg (19) and the second material returning device (21), and fixed-bed pyrolysis stove (22) bottom connects the second feed back Device (21), the second material returning device (21) connect the side-lower of the circle fluidized-bed gasification furnace (9) by the second feed back leg (19).
- A kind of 8. biomass double bed gasification-pyrolysis coupling electricity generation system as claimed in claim 6, it is characterised in that：It is described thick Gas measurement blowing unit and supporting fuel element include air-introduced machine (26), the rough coal on fixed-bed pyrolysis stove (22) top Gas outlet is by pipeline connection air-introduced machine (26) entrance, air-introduced machine (26) outlet connection raw gas combustion boiler system (27), institute The pipeline stated between the raw gas outlet of fixed-bed pyrolysis stove (22) and air-introduced machine (26) is provided with raw gas flowmeter (25).
Priority Applications (1)
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