CN107338074A - A kind of fluidized gasification system for preparing high heating value biological fuel gas and its application - Google Patents
A kind of fluidized gasification system for preparing high heating value biological fuel gas and its application Download PDFInfo
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- CN107338074A CN107338074A CN201710055742.8A CN201710055742A CN107338074A CN 107338074 A CN107338074 A CN 107338074A CN 201710055742 A CN201710055742 A CN 201710055742A CN 107338074 A CN107338074 A CN 107338074A
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- combustion
- gas
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- biological fuel
- gasifying agent
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- 238000002309 gasification Methods 0.000 title claims abstract description 50
- 239000002737 fuel gas Substances 0.000 title claims abstract description 38
- 238000010438 heat treatment Methods 0.000 title claims abstract description 27
- 239000000567 combustion gas Substances 0.000 claims abstract description 63
- 239000003546 flue gas Substances 0.000 claims abstract description 61
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000007789 gas Substances 0.000 claims abstract description 48
- 238000002485 combustion reaction Methods 0.000 claims abstract description 43
- 239000003795 chemical substances by application Substances 0.000 claims description 49
- 239000002028 Biomass Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 7
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/54—Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
- C10J3/56—Apparatus; Plants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0916—Biomass
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0956—Air or oxygen enriched air
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The present invention relates to a kind of fluidized gasification system for preparing high heating value biological fuel gas and its application.Wherein system includes fluidized gasification device, cyclone separator and adiabatic combustion device；Fluidized gasification device is provided with combustion gas air compartment, returning charge mouth, flue gas heat exchange tube, the first gas outlet；Cyclone separator is connected by tangential air inlet with the first gas outlet；Cyclone separator is connected with the first combustion gas branch pipe, the second combustion gas branch pipe and the 3rd combustion gas branch pipe；First combustion gas branch pipe is connected with combustion gas air compartment；Connected between cyclone separator lower end and returning charge mouth by refeed line；Adiabatic combustion device is connected with the second combustion gas branch pipe, and is connected by exhanst gas outlet with flue gas heat exchange tube.The present invention can significantly decrease the dosage of air, improve the calorific value of biological fuel gas, can be applied to the heat supply of Industrial Stoves.
Description
Technical field
The present invention relates to a kind of gasification of biomass and Industrial Stoves heating field, more particularly to one kind to prepare high heating value biology
The fluidized gasification system of matter combustion gas and its application.
Background technology
As a large amount of getting worses using the environmental problem brought of fossil energy, the utilization of regenerative resource are wide
General development.For biomass energy as a kind of reproducible clean energy resource, ash, nitrogen, sulfur content are low, sulfide during as fuel combustion,
Nitrogen oxides, flue dust are few, and can realize carbon dioxide zero discharge, are increasingly taken seriously.Biomass gasification technology is by solid-state
Biomass is converted to a kind of technology of biological fuel gas, and for biological fuel gas compared to biomass, major advantage is biological fuel gas
Utilization ratio it is higher, widely used.It can be used for heat supply, generating and synthesis chemicals etc. in commercial Application.
At present, it is main using from heat supply mode during gasification of biomass, aoxidized by gasifying agent air and biomass material
The exothermic reaction in area provides the heat needed for whole biomass gasification reaction.Air and the heat chemistry of biomass material exothermic reaction
Equation includes：
C(s)+O2(g)→CO2(g) △ H=-408.177kJ/mol；
2C(s)+O2(g) → 2CO (g) △ H=-246.034kJ/mol.
N has inevitably been brought into during using air as gasifying agent2, cause biological fuel gas N2Content is up to 50%, combustion gas
Calorific value is relatively low, about 1200kCal/Nm3, do not reach the requirements of some applications for needing high temperature.For example, Industrial Stoves are to fuel
Ignition temperature typically require more than 1300 DEG C, and the biological fuel gas ignition temperature produced at present is 1050 DEG C~1150 DEG C,
Industrial Stoves partial sector and the temperature requirement of period are unable to reach, when can extend the work of Industrial Stoves in application process
Between, reduce production.
Reduce N in biological fuel gas2Content, lift the calorific value of biological fuel gas, can effectively widen biomass fuel
The application of gas.In the prior art, applied to meet high temperature application such as Industrial Stoves, non-ferrous metal metallurgy reverberatory furnace
It is required that the technique using oxygen-enriched air as gasifying agent can be used, but the preparation system of combustion gas needs to increase oxygen-enriched control preparation
Device, such as pressure swing adsorption process unit or film adsorption technology process unit, complicate biological fuel gas preparation system,
Production cost improves.
The content of the invention
In view of the above-mentioned problems, the invention provides a kind of fluidized gasification system for preparing high heating value biological fuel gas, with
About 350 DEG C of hot-air is as gasifying agent, without using oxygen-enriched air；It is biological by way of heat exchanger heat exchange by external heat source
Matter gasification system provides partial heat, reduces gasifying agent such as air in gasification reactor to a certain extent and is reacted with biomass material
Heat release, the dosage of gasifying agent is significantly decreased, improve the calorific value of biological fuel gas.And described fluidized gasification is provided simultaneously
System heat supply is in the application of Industrial Stoves.
The technical solution adopted by the present invention is：
A kind of fluidized gasification system for preparing high heating value biological fuel gas, including fluidized gasification device, whirlwind are provided
Separator and adiabatic combustion device；
The fluidized gasification device be sequentially provided with from the bottom to top combustion gas air compartment, combustion gas air distribution plate, charging aperture and returning charge mouth,
Gasifying agent air compartment, flue gas heat exchange tube, the first gas outlet；
Cyclone separator upper end side is provided with tangential air inlet, and the air inlet connects with first gas outlet
Connect；
The second gas outlet is provided among the cyclone separator upper end, second gas outlet is connected with the first combustion gas
Branch pipe, the second combustion gas branch pipe and the 3rd combustion gas branch pipe；The first combustion gas branch pipe is connected with the combustion gas air compartment；
The cyclone separator lower end is provided with discharging opening, is connected between the discharging opening and the returning charge mouth by refeed line
Connect；
The adiabatic combustion device is provided with the first burner and combustion chamber, first burner and the second combustion gas branch
Pipe connects, and first burner is also associated with combustion fan；The combustion chamber is provided with exhanst gas outlet, the exhanst gas outlet with
The flue gas heat exchange tube connection.
The fluidized gasification device is with by the cyclone separator, the combustion gas work being passed through by the first combustion gas branch pipe
For fluidizing gas, the heat release answered using air as gasifying agent with air and biomass reverse and flue gas heat exchange tube conduct heat for thermal source.Institute
The high-temperature flue gas for stating flue gas heat exchange tube derives from described adiabatic combustion device, and described adiabatic combustion device is with by the second combustion gas
The combustion gas that branch pipe is passed through is as fuel.
Further, the gasifying agent air compartment is annular, at 400mm above charging aperture；The flue gas heat exchange tube water
Plain cloth is put, at 600mm above gasifying agent air compartment.
Further, the combustion chamber is provided with flame retardant coating, and flame retardant coating heatproof is not less than 1000 DEG C；Described flue gas heat exchange tube
Heatproof is not less than 1000 DEG C.
Further, the fluidized gasification system also includes gasifying agent preheater, and the gasifying agent preheater includes the
One exhaust gases passes and gasifying agent passage, first exhaust gases passes are connected with the flue gas heat exchange tube, the gasifying agent passage with
The gasifying agent air compartment connection.Between the flue gas and the air of entrance gasifying agent air compartment that the flue gas heat exchange tube is discharged are in preheater
Heat exchange is connect, improves utilization rate of waste heat.Further, flow of flue gas direction leads to the gasifying agent in first exhaust gases passes
Gasifying agent flow direction by reverse heat-exchange on the contrary, further improve heat exchange efficiency in road.
Further, the fluidized gasification system also includes spiral dryer, the spiral dryer and the charging
Mouth connection.Further, the second exhaust gases passes that can be exchanged heat with the spiral dryer, institute are provided with the spiral dryer
The second exhaust gases passes are stated to be connected with first exhaust gases passes.Flue gas after preheated device is used further to dried biomass, further
Improve utilization rate of waste heat.Further, flow of flue gas direction and life in the spiral dryer in second exhaust gases passes
The conveying direction of raw material of substance is opposite.
The present invention further provides a kind of above-mentioned fluidized gasification system heat supply for preparing high heating value biological fuel gas in
The application of Industrial Stoves, Industrial Stoves are provided with the 3rd combustion gas branch pipe end, the Industrial Stoves are provided with the second burning
Device, second burner are connected with the 3rd combustion gas branch pipe；The Industrial Stoves are provided with smoke discharge tube road and combustion-supporting sky
Gas enters pipeline, and the smoke discharge tube road and combustion air are exchanged heat into pipeline by heat exchanger.
Combustion gas mixes with combustion air through Industrial Stoves burner, burnt, and heat supply is in Industrial Stoves, and discharge temperature is up to 800
Flue gas more than DEG C, high-temperature flue gas are cooled to 400~450 DEG C of discharges after heat exchanger heats combustion air.Combustion air preheats
To 350 DEG C.
Further, the heat exchanger is heat regenerator.
Heat supply and cigarette that gasifying agent is answered with biomass reverse can be adjusted according to requirement of the different Industrial Stoves to ignition temperature
The ratio of gas heat exchanger tube heat transfer, the biological fuel gas of different calorific values is obtained, to meet the requirement of Industrial Stoves.
The present invention can obtain following beneficial effect：
(1) conducted heat using high-temperature flue gas through flue gas heat exchange tube as one of thermal source of biomass gasification system, effectively reduce gas
The dosage of change system gasifying agent air, obtains high heating value biological fuel gas, and fuel gases calorific value highest can lift 100%；
(2) high-temperature flue gas is obtained using adiabatic combustion device, flue-gas temperature is up to more than 1000 DEG C, with described fluid bed
The temperature difference is big in gasification installation, and heat transfer efficiency is high；Flue gas after heat exchange can be used for heating and gasifying agent and dried biomass raw material, heat
Cascade utilization is measured, further reduces the dosage of air；
(3) biological fuel gas of high heating value can meet requirement of the Industrial Stoves to fuel, simplify biological fuel gas application
Technique；According to requirement of the different Industrial Stoves to fuel, the calorific value of biological fuel gas can be adjusted.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of fluidized gasification system for preparing high heating value biological fuel gas of the present invention.
In figure, 1- fluidized gasification devices, 11- combustion gas air compartments, 12- combustion gas air distribution plates, 13- charging apertures, 14- returning charge mouths,
15- gasifying agent air compartments, 16- flue gas heat exchange tubes, the gas outlets of 17- first；2- cyclone separators, 21- air inlets, 22- second fire
Gas exports, 23- discharging openings；3- adiabatic combustion devices, the burners of 31- first, 32- combustion chambers, 33- combustion fans, 34- flue gases go out
Mouthful；4- the first combustion gas branch pipes；5- the second combustion gas branch pipes；The combustion gas branch pipes of 6- the 3rd；7- refeed lines；8- gasifying agent preheaters；9- spiral shells
Revolve drier；10- Industrial Stoves；The burners of 101- second；102- smoke discharge tubes road；103- combustion airs enter pipeline；
104- heat exchangers.
Embodiment
Below in conjunction with Figure of description, the present invention is described in detail：
A kind of fluidized system for preparing high heating value biological fuel gas as shown in Figure 1, including fluidized gasification device 1,
Cyclone separator 2 and adiabatic combustion device 3；The fluidized gasification device 1 is sequentially provided with combustion gas air compartment 11, combustion gas from the bottom to top
Air distribution plate 12, charging aperture 13 and returning charge mouth 14, gasifying agent air compartment 15, flue gas heat exchange tube 16, the first gas outlet 17.
The upper end side of cyclone separator 2 is provided with tangential air inlet 21, the air inlet 21 and first combustion gas
The connection of outlet 17.The second gas outlet 22 is provided among the upper end of cyclone separator 2, second gas outlet 22 is connected with
First combustion gas branch pipe 4, the second combustion gas branch pipe 5 and the 3rd combustion gas branch pipe 6；The first combustion gas branch pipe 4 and the combustion gas air compartment 11
Connection；The lower end of cyclone separator 2 is provided with discharging opening 23, passes through refeed line between the discharging opening 23 and the returning charge mouth 14
7 connections.
The adiabatic combustion device 3 is provided with the first burner 31 and combustion chamber 32, first burner 31 and described the
Two combustion gas branch pipes 5 connect, and first burner 31 is also associated with combustion fan 33；The combustion chamber 32 is provided with exhanst gas outlet
34, the exhanst gas outlet 34 is connected with the flue gas heat exchange tube 16.
The gasifying agent air compartment 15 is annular, at 400mm above charging aperture 13；The 16 horizontal cloth of flue gas heat exchange tube
Put, at 600mm above gasifying agent air compartment 15.The combustion chamber 32 is provided with flame retardant coating, and flame retardant coating heatproof is not less than 1000 DEG C.
The described heatproof of flue gas heat exchange tube 16 is not less than 1000 DEG C.
A kind of fluidized gasification system for preparing high heating value biological fuel gas also includes gasifying agent preheater 8 and spiral
Drier 9.The gasifying agent preheater 8 includes the first exhaust gases passes and gasifying agent passage, first exhaust gases passes with it is described
Flue gas heat exchange tube 16 is connected, and the gasifying agent passage is connected with the gasifying agent air compartment 15.Flue gas in first exhaust gases passes
Flow direction is opposite with gasifying agent flow direction in the gasifying agent passage.The spiral dryer 9 connects with the charging aperture 13
Connect.The second exhaust gases passes that can be exchanged heat with the spiral dryer 9 are provided with the spiral dryer 9, second flue gas leads to
Road is connected with first exhaust gases passes.Flow of flue gas direction and life in the spiral dryer 9 in second exhaust gases passes
The conveying direction of raw material of substance is opposite.
During present invention work, biomass material is dried through spiral dryer 9, enters fluidized gasification device through charging aperture 13
1；Combustion gas in first combustion gas branch pipe 4 is through air compartment 11 and by combustion gas air distribution plate 12 to fluidized gasification device 1, there is provided fluidized gas
Body；Air enters fluidized gasification device 1 after the heating of preheater 8, through gasifying agent air compartment 15, there is provided gasifying agent；Flue gas changes
High-temperature flue gas in heat pipe 16 is used as the part of heat energy of fluidized gasification device 1 by indirect heat transfer；With air and biomass reverse
The heat release answered is as another part thermal source.Temperature maintains about 600 DEG C in fluidized gasification device 1, and gasifying agent and biomass are former
Material is pyrolyzed in fluidized gasification device 1, reduced, oxidation reaction, generates the high heating value combustion gas of about 600 DEG C of temperature.
The combustion gas that fluidized gasification device 1 generates tangentially enters in cyclone separator 2, isolates material and falls into discharging opening
23, along refeed line 7 to returning charge mouth 14, gasify again into fluidized gasification device 1.Combustion gas after cyclone separator 1 is divided into
Three parts：A part enters the combustion gas air compartment 11 of the bottom of fluidized gasification device 1 through the first combustion gas branch pipe 4, as fluidizing gas
Circulation；A part of burner 31 through the second combustion gas branch pipe 5 to adiabatic combustion device 3, it is combustion-supporting with being conveyed through combustion fan 33
Air reaction burning generation temperature is up to more than 1000 DEG C of high-temperature flue gas, and high-temperature flue gas conducts heat in stream into flue gas heat exchange tube 16
Change the material in bed gasifying apparatus 1, flue-gas temperature is down to about 800 DEG C；A part of biological fuel gas is applied through the 3rd combustion gas branch pipe 6
In subsequent technique.
About 800 DEG C of flue gas and the air as gasifying agent discharged through flue gas heat exchange tube 16 are indirect inverse in preheater 8
To heat exchange, atmosphere temperature rising is cooled to 400~450 DEG C to gasifying agent air compartment 15 is entered after about 350 DEG C after the preheated device 8 of flue gas.
400~450 DEG C of flue gas enters the indirect reverse heat-exchange dried biomass raw material of spiral drier 9, biomass material moisture drop
To less than 20%, flue gas cool-down is to discharging after about 150 DEG C.
The above-mentioned fluidized system for preparing high heating value biological fuel gas is applied to the heat supply of Industrial Stoves, the described 3rd
The end of combustion gas branch pipe 6 is provided with Industrial Stoves 10, and the Industrial Stoves 10 are provided with the second burner 101, second burner
101 are connected with the 3rd combustion gas branch pipe 6；The Industrial Stoves 10 are provided with smoke discharge tube road 102 and combustion air enters pipe
Road 103, the smoke discharge tube road 102 and combustion air are exchanged heat into pipeline 103 by heat exchanger 104.The heat exchange
Device 104 is heat regenerator.The fuel gas temperature of 3rd combustion gas branch pipe 6 conveying is about 600 DEG C, is supplied with combustion air reactive combustion
Heat is in Industrial Stoves 10, and for ignition temperature up to more than 1300 DEG C, the flue-gas temperature of discharge is up to about 800 DEG C.About 800 DEG C of flue gas warp
Heat exchanger 104, combustion air is preheated to about 350 DEG C, flue-gas temperature is discharged after being down to 400~450 DEG C.
When heat exchanger 104 works, high-temperature flue gas enters the first regenerator of heat exchanger 104, conducts heat in the first heat-storing material,
Discharged after flue gas cool-down；After first heat-storing material is warming up to design temperature, flue gas switching valve is rotated, high-temperature flue gas enters second and stored
The second heat-storing material of hot cell heat transfer in the inner；When high-temperature flue gas is by the second regenerator, accessory fan provides combustion air
Absorb heat and heat up into the first regenerator, after the first heat-storing material temperature is down to design temperature, rotary air switching valve, air enters
Enter the heat absorption of the second regenerator.So alternately, the heat transfer of high-temperature flue gas and combustion air is completed.
The present invention is using air as gasifying agent, without using oxygen-enriched air；Carried by biomass gasification system of high-temperature flue gas
For partial heat, air and biomass material exothermic heat of reaction are reduced to a certain extent, significantly decreases the dosage of air, improve life
The calorific value of substance combustible gas.
Described above is only the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also without departing from the scope of protection of the invention.
Claims (10)
1. a kind of fluidized gasification system for preparing high heating value biological fuel gas, it is characterised in that including fluidized gasification device
(1), cyclone separator (2) and adiabatic combustion device (3)；
The fluidized gasification device (1) is sequentially provided with combustion gas air compartment (11), combustion gas air distribution plate (12), charging aperture from the bottom to top
And returning charge mouth (14), gasifying agent air compartment (15), flue gas heat exchange tube (16), the first gas outlet (17) (13)；
Cyclone separator (2) the upper end side is provided with tangential air inlet (21), the air inlet (21) and the described first combustion
Gas outlet (17) connection；
The second gas outlet (22) is provided among cyclone separator (2) upper end, second gas outlet (22) is connected with
First combustion gas branch pipe (4), the second combustion gas branch pipe (5) and the 3rd combustion gas branch pipe (6)；The first combustion gas branch pipe (4) and the combustion
Gas air compartment (11) connects；
Cyclone separator (2) lower end is provided with discharging opening (23), leads between the discharging opening (23) and the returning charge mouth (14)
Cross refeed line (7) connection；
The adiabatic combustion device (3) is provided with the first burner (31) and combustion chamber (32), first burner (31) and institute
The connection of the second combustion gas branch pipe (5) is stated, first burner (31) is also associated with combustion fan (33)；On the combustion chamber (32)
Provided with exhanst gas outlet (34), the exhanst gas outlet (34) is connected with the flue gas heat exchange tube (16).
A kind of 2. fluidized gasification system for preparing high heating value biological fuel gas according to claim 1, it is characterised in that
The gasifying agent air compartment (15) is annular, at 400mm above charging aperture (13)；The horizontal cloth of the flue gas heat exchange tube (16)
Put, at 600mm above gasifying agent air compartment (15).
A kind of 3. fluidized gasification system for preparing high heating value biological fuel gas according to claim 1, it is characterised in that
The combustion chamber (32) is provided with flame retardant coating, and flame retardant coating heatproof is not less than 1000 DEG C；Described flue gas heat exchange tube (16) heatproof is not low
In 1000 DEG C.
4. a kind of fluidized gasification system for preparing high heating value biological fuel gas according to claim any one of 1-3, its
It is characterised by also including gasifying agent preheater (8), the gasifying agent preheater (8) includes the first exhaust gases passes and gasifying agent leads to
Road, first exhaust gases passes are connected with the flue gas heat exchange tube (16), the gasifying agent passage and the gasifying agent air compartment
(15) connect.
A kind of 5. fluidized gasification system for preparing high heating value biological fuel gas according to claim 4, it is characterised in that
Flow of flue gas direction is opposite with gasifying agent flow direction in the gasifying agent passage in first exhaust gases passes.
A kind of 6. fluidized gasification system for preparing high heating value biological fuel gas according to claim 4, it is characterised in that
Also include spiral dryer (9), the spiral dryer (9) is connected with the charging aperture (13).
A kind of 7. fluidized gasification system for preparing high heating value biological fuel gas according to claim 6, it is characterised in that
The second exhaust gases passes that can be exchanged heat with the spiral dryer (9) are provided with the spiral dryer (9), second flue gas leads to
Road is connected with first exhaust gases passes.
A kind of 8. fluidized gasification system for preparing high heating value biological fuel gas according to claim 7, it is characterised in that
Flow of flue gas direction is opposite with the conveying direction of biomass material in the spiral dryer (9) in second exhaust gases passes.
A kind of 9. fluidized gasification system heat supply for preparing high heating value biological fuel gas according to claim any one of 1-8
In the application of Industrial Stoves, it is characterised in that be provided with Industrial Stoves (10), the industry in the 3rd combustion gas branch pipe (6) end
Kiln (10) is provided with the second burner (101), and second burner (101) is connected with the 3rd combustion gas branch pipe (6)；Institute
State Industrial Stoves (10) and enter pipeline (103), the smoke discharge tube road provided with smoke discharge tube road (102) and combustion air
(102) exchanged heat with combustion air into pipeline (103) by heat exchanger (104).
10. a kind of fluidized gasification system heat supply for preparing high heating value biological fuel gas according to claim 9 is in industry
The application of kiln, it is characterised in that the heat exchanger (104) is heat regenerator.
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