CN206538389U - A kind of downdraft fixed bed system with residual heat utilizing function - Google Patents
A kind of downdraft fixed bed system with residual heat utilizing function Download PDFInfo
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- CN206538389U CN206538389U CN201720135300.XU CN201720135300U CN206538389U CN 206538389 U CN206538389 U CN 206538389U CN 201720135300 U CN201720135300 U CN 201720135300U CN 206538389 U CN206538389 U CN 206538389U
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- blast tube
- spiral drier
- pyrolysis
- spiral
- drier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The utility model is related to a kind of downdraft fixed bed system with residual heat utilizing function, including the first spiral drier, the second spiral drier, pyrolysis gasifying device and the gasifying agent preheater being sequentially connected；The pyrolysis gasifying device top is pyrolysis zone, and bottom is gasification zone；Gasification zone lower end side is provided with starting gas outlet；It is provided with first spiral drier in the first blast tube, second spiral drier and is provided with the second blast tube, the 3rd blast tube is provided with the pyrolysis zone；The starting gas outlet, gasifying agent preheater, the 3rd blast tube, the second blast tube, the first blast tube are sequentially communicated.The utility model efficiently utilizes the waste heat of high-temperature fuel gas, and improves the scope of application to raw material of downdraft fixed bed system.
Description
Technical field
The utility model is related to gasification of biomass field, and more particularly to a kind of downdraft with residual heat utilizing function is consolidated
Fixed bed system.
Background technology
As conventional energy resource is petered out, regenerative resource has rich reserves, renewable, no pollution zero-emission etc. excellent
Point, is increasingly paid attention to.Biomass is important regenerative resource, because its is ready availability and is easy to usability, is concern
Emphasis.22 middle of century are expected, biomass accounts for more than the 40% of global total energy consumption by combustion gas is substituted, effectively supplements conventional energy resource
Deficiency.
Current biomass gasification technology is divided into fixed bed gasification technology and fluidized gasification technology.Fixed bed gasification is by one
Anaerobism burning in quantitative biomass material input gasification installation, ultimately generates a kind of biomass energy conversion skill of fuel gas
Art." fixation " refers to that biomass material does not flow in stove, gasifies under static state.Fixed bed gasification technology is broadly divided into
Suction gasification technology and downdraft gasification technology.Wherein downdraft gasification technology has the advantages that tar content is low, but lower suction
The fuel gas temperature of formula gasification technology generation is up to 800-900 DEG C, and overall thermal efficiency is relatively low；Ingredient requirement is harsh, and moisture needs low
In 20%, gasification efficiency otherwise can be reduced.In the application process of downdraft gasification technology, it is necessary to consider above-mentioned factor.
Utility model content
In order to overcome above-mentioned technical problem, the purpose of this utility model is to provide under a kind of effective utilization waste heat gas
Suction fixed bed system.
The technical solution adopted in the utility model is：
A kind of downdraft fixed bed system with residual heat utilizing function, including the first spiral drier, second are provided
Spiral drier, pyrolysis gasifying device and gasifying agent preheater, the discharging opening of first spiral drier and described the
The charging aperture connection of two spiral driers, the discharging opening of second spiral drier and entering for the pyrolysis gasifying device
Material mouth is connected；The pyrolysis gasifying device top is pyrolysis zone, and bottom is gasification zone, and centre, which is provided with, can be passed through the wind of gasifying agent
Case；Gasification zone lower end side is provided with starting gas outlet；Being provided with first spiral drier can be with the first spiral
Drying device be provided with the first blast tube of heat exchange, second spiral drier to dry with the second spiral and filled
Put and be provided with the progress blast tube of heat exchange second, the pyrolysis zone and can carry out the blast tube of heat exchange the 3rd with pyrolysis zone；Institute
State starting gas outlet to connect with the gasifying agent preheater, the gasifying agent preheater is connected with the 3rd blast tube,
3rd blast tube is connected with second blast tube, and second blast tube connects with first blast tube
Logical, the first blast tube end is provided with final gas outlet.
Biomass material in the first spiral drier with high-temperature fuel gas occur heat transfer, dried biomass raw material, so
Occur heat transfer with high-temperature fuel gas in the second spiral drier afterwards, biomass material, biomass material water is further dried
Divide and be reduced to less than 20%, vapor is discharged.Can according to the initial moisture of biomass material, adjustment spiral drier
Rotating speed and the flow velocity of combustion gas.
Dried biomass material enters pyrolysis gasifying device, by adjusting the flow velocity of combustion gas, controls the temperature of pyrolysis zone
Spend the biomass after 400-600 DEG C, pyrolysis and enter gasification zone, the air gasification agent with 200 DEG C is reacted, generation temperature is up to
900 DEG C of biological fuel gas.
Combustion gas enters gasifying agent heat-exchange device through originating gas outlet, with gasifying agent indirect heat exchange, the temperature of gasifying agent
200 DEG C are risen to, into bellows, is reacted in gasification zone and biomass material, subsequent fuel gas temperature is down to 800 DEG C.
The combustion gas for leaving preheater enters the 3rd blast tube and the biomass material heat exchange in pyrolysis zone, fuel gas temperature drop
To 600 DEG C.Then, combustion gas sequentially enters the blast tube of the second spiral drier and the first spiral drier, combustion gas temperature
Degree is down to 350 DEG C.Last combustion gas is discharged through final gas outlet.
Further, the 3rd blast tube, the second blast tube, the fuel gas flow direction in the first blast tube with
First spiral drier, the second spiral drier, feedstock transportation is in opposite direction in pyrolysis gasifying device.Biomass is former
Material and combustion gas reverse flow, can be better achieved the heat exchange of biomass material and combustion gas.
Further, first gas pipeline and the second gas pipeline are located at the first spiral drier and second respectively
In the axial direction of spiral drier.Further, the 3rd blast tube is located in the axial direction of the pyrolysis zone.In order to original
Material equably carries out heat exchange with combustion gas.
Further, the 3rd blast tube is broken pipe, and the contact area of broken pipe and raw material increases, combustion gas in pyrolysis
Area's residence time increases, and is conducive to improving heat exchanger effectiveness.
The beneficial effects of the utility model are：
(1) high-temperature fuel gas that downdraft fixed bed system is produced exchanges heat with air gasification agent, biomass material successively, effectively
The waste heat that make use of high-temperature fuel gas, significantly improve the thermal efficiency of downdraft fixed bed system；
(2) biomass material is independently dried before the pyrolytic gasification stage is entered, and on the one hand improves downdraft fixed bed system
The scope of application to raw material of system, on the other hand improves the gasification efficiency of the system.
Brief description of the drawings
Accompanying drawing 1 is a kind of structural representation of the downdraft fixed bed system with residual heat utilizing function of the utility model.
In figure, the spiral driers of 1- first, the gas pipelines of 11- first, the final gas outlets of 12-；The spirals of 2- second are done
Dry device, the gas pipelines of 21- second；3- pyrolysis gasifying devices, 31- pyrolysis zones, the gas pipelines of 311- the 3rd, 32- gasification zones,
33- bellows, 331- intake stacks, 34- starting gas outlets, 35- fire grates, 36- slag notches；4- preheaters；5- gasification blower fans.
Embodiment：
The utility model will be further described below in conjunction with the accompanying drawings.
A kind of downdraft fixed bed system with residual heat utilizing function as shown in Figure 1, including the first spiral dry dress
Put the 1, second spiral drier 2, pyrolysis gasifying device 3 and gasifying agent preheater 4, first spiral drier 1 goes out
Material mouth is connected with the charging aperture of second spiral drier 2, discharging opening and the heat of second spiral drier 2
Solve the charging aperture connection of gasification installation 3.
The top of pyrolysis gasifying device 3 is pyrolysis zone 31, and bottom is gasification zone 32, and centre, which is provided with, can be passed through gasifying agent
Bellows 33；The lower end side of gasification zone 32 is provided with starting gas outlet 34.
The first combustion gas of heat exchange can be carried out with the first spiral drier 1 by being provided with first spiral drier 1
The blast tube of heat exchange second can be carried out with the second spiral drier 2 by being provided with passage 11, second spiral drier 2
21, interior be provided with the pyrolysis zone 31 can carry out the blast tube 311 of heat exchange the 3rd with pyrolysis zone.
The starting gas outlet 34 is connected with the gasifying agent preheater 4, the gasifying agent preheater 4 and the described 3rd
Blast tube 311 is connected, and the 3rd blast tube 311 is connected with second blast tube 21, second blast tube
21 connect with first blast tube 11, and the end of the first blast tube 11 is provided with final gas outlet 12.
3rd blast tube 311, the second blast tube 21, the fuel gas flow direction in the first blast tube 11 and institute
State the first spiral drier 1, the second spiral drier 2, feedstock transportation is in opposite direction in pyrolysis gasifying device 3.
3rd blast tube 311 is located in the axial direction of the pyrolysis zone 31.First gas pipeline 11 and second
Gas pipeline 12 is located in the axial direction of the first spiral drier 1 and the second spiral drier 2 respectively.3rd combustion gas is led to
Road 311 is broken pipe.
The gasifying agent preheater 4 has wrapped around gasifying agent conveyance conduit, gasifying agent conveyance conduit one end connection
There is gasification blower fan 5, the other end is connected with the bellows 33.The bellows 33 are provided with blast pipe 331.
Steam outlet is equipped with first spiral drier 1 and second spiral drier 2.The heat
Solve gasification installation lower end and be provided with fire grate 35 and slag notch 36.
During utility model works, biomass material enters occurs hot pass with high-temperature fuel gas in the first spiral drier 1
Pass, the moisture evaporation of biomass material is simultaneously discharged through steam outlet.Biomass material enter in the second spiral drier 2 with
High-temperature fuel gas further exchanges heat, and biomass material moisture is reduced to less than 20%.
Enter pyrolysis gasifying device 3 by the dried biomass material of the second helix transporting device 2, first in pyrolysis zone
It is pyrolyzed in 31 with combustion gas, Volatile.The temperature of pyrolysis zone 31 is at 400-600 DEG C.Biomass after pyrolysis is entered
Enter gasification zone 32, the air gasification agent with 200 DEG C is reacted, generation temperature is up to 900 DEG C of biological fuel gas, and clinker is through fire grate 35
Discharged from slag-drip opening 36.
The combustion gas of high temperature enters gasifying agent preheater 4, and with the air indirect heat exchange as gasifying agent, the temperature of air rises to
200 DEG C, into the bellows 33 of pyrolysis gasifying device, reacted in gasification zone 32 and biomass material；Fuel gas temperature is down to 800 DEG C.
The combustion gas for leaving gasifying agent preheater 4 is changed into the biomass material in the 3rd blast tube 311, with pyrolysis zone 31
Heat, fuel gas temperature is down to 600 DEG C.Then, combustion gas sequentially enters the second blast tube and the 3rd blast tube, with biomass material
Reverse heat-exchange, fuel gas temperature is down to 350 DEG C.
The utility model efficiently utilizes the waste heat of high-temperature fuel gas, and improve downdraft fixed bed system to raw material
The scope of application.
Obviously, above-mentioned embodiment is that, to illustrate one of example of the present utility model, but it is new to be not limited to this practicality
Type embodiment, change or the replacement in other forms can be made on the basis of the above description, and these change or replaced
In generation, also will be contained within the protection domain of the utility model determination.
Claims (5)
1. a kind of downdraft fixed bed system with residual heat utilizing function, it is characterised in that including the first spiral drier
(1), the second spiral drier (2), pyrolysis gasifying device (3) and gasifying agent preheater (4), first spiral drier
(1) discharging opening is connected with the charging aperture of second spiral drier (2), and the second spiral drier (2) go out
Material mouth is connected with the charging aperture of the pyrolysis gasifying device (3)；Pyrolysis gasifying device (3) top is pyrolysis zone (31), under
Portion is gasification zone (32), and centre, which is provided with, can be passed through the bellows (33) of gasifying agent；Gasification zone (32) the lower end side is provided with starting
Gas outlet (34)；Heat exchange can be carried out with the first spiral drier (1) by being provided with first spiral drier (1)
Hot friendship can be carried out with the second spiral drier (2) by being provided with first blast tube (11), second spiral drier (2)
Change in the second blast tube (21), the pyrolysis zone (31) and be provided with and can carry out the blast tube (311) of heat exchange the 3rd with pyrolysis zone；
The starting gas outlet (34) connects with the gasifying agent preheater (4), the gasifying agent preheater (4) and the described 3rd combustion
Gas passage (311) is connected, and the 3rd blast tube (311) connects with second blast tube (21), second combustion gas
Passage (21) is connected with first blast tube (11), and the first blast tube (11) end is provided with final gas outlet
(12)。
2. a kind of downdraft fixed bed system with residual heat utilizing function according to claim 1, it is characterised in that institute
State the 3rd blast tube (311), the second blast tube (21), the fuel gas flow direction in the first blast tube (11) and described the
One spiral drier (1), the second spiral drier (2), pyrolysis gasifying device (3) interior feedstock transportation are in opposite direction.
3. a kind of downdraft fixed bed system with residual heat utilizing function according to claim 1, it is characterised in that institute
State the axial direction that the first gas pipeline and the second gas pipeline are located at the first spiral drier and the second spiral drier respectively
On.
4. a kind of downdraft fixed bed system with residual heat utilizing function according to claim 1, it is characterised in that institute
The 3rd blast tube (311) is stated in the axial direction of the pyrolysis zone (31).
5. a kind of downdraft fixed bed system with residual heat utilizing function as described in claim any one of 1-4, its feature
It is broken pipe to be the 3rd blast tube (311).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720135300.XU CN206538389U (en) | 2017-02-15 | 2017-02-15 | A kind of downdraft fixed bed system with residual heat utilizing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720135300.XU CN206538389U (en) | 2017-02-15 | 2017-02-15 | A kind of downdraft fixed bed system with residual heat utilizing function |
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| CN206538389U true CN206538389U (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720135300.XU Active CN206538389U (en) | 2017-02-15 | 2017-02-15 | A kind of downdraft fixed bed system with residual heat utilizing function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110437883A (en) * | 2019-08-05 | 2019-11-12 | 青岛德瑞汇丰环保科技有限公司 | A kind of integrated downdraft biomass gasification device and method |
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2017
- 2017-02-15 CN CN201720135300.XU patent/CN206538389U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110437883A (en) * | 2019-08-05 | 2019-11-12 | 青岛德瑞汇丰环保科技有限公司 | A kind of integrated downdraft biomass gasification device and method |
| CN110437883B (en) * | 2019-08-05 | 2021-06-15 | 青岛德瑞汇丰环保科技股份有限公司 | Integrated downdraft biomass gasification device and method |
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