CN109705920A - Gasification of biomass couples coal unit power generator - Google Patents
Gasification of biomass couples coal unit power generator Download PDFInfo
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- CN109705920A CN109705920A CN201910058478.2A CN201910058478A CN109705920A CN 109705920 A CN109705920 A CN 109705920A CN 201910058478 A CN201910058478 A CN 201910058478A CN 109705920 A CN109705920 A CN 109705920A
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- Prior art keywords
- gas
- coal
- burning boiler
- burner
- biomass
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- 239000002028 Biomass Substances 0.000 title claims abstract description 35
- 238000002309 gasification Methods 0.000 title claims abstract description 29
- 239000003245 coal Substances 0.000 title claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 67
- 238000002485 combustion reaction Methods 0.000 claims abstract description 21
- 239000000428 dust Substances 0.000 claims abstract description 8
- 230000001172 regenerating effect Effects 0.000 claims abstract description 4
- 239000000567 combustion gas Substances 0.000 claims description 15
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 2
- 239000002737 fuel gas Substances 0.000 abstract description 13
- 239000000779 smoke Substances 0.000 abstract description 6
- 239000003054 catalyst Substances 0.000 abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 9
- 238000010248 power generation Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002671 adjuvant Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011269 tar Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011285 coke tar Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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 present invention provides a kind of gasification of biomass to couple coal unit power generator.It mainly solves under ultra-low load operating condition that SCR inlet smoke temperature is low, is lower than the effective operating temperature of catalyst, the problem of denitration can not come into operation.The circle fluidized-bed gasification furnace, cyclone dust collectors, gas heat-exchanger is sequentially connected with by pipeline, the one routing road A gas pipeline of gas heat-exchanger outlet connects by gas burner A and accesses coal-burning boiler burner hearth, another way is connected by gas burner B by the road B gas pipeline and accesses horizontal flue before SCR denitration device, SCR denitration device passes through the horizontal flue and coal-burning boiler coal economizer outlet, the hot secondary air duct of the gas combustion chamber of gas burner B and the tail portion of coal-burning boiler is connected to, the hot secondary air duct in the tail portion of coal-burning boiler is connected to rotary regenerative air preheater respectively with SCR denitration device exhaust pass.It realizes under coal unit Ultra-low load operation operating condition, the coupled electricity-generation of biological fuel gas and coal unit.
Description
Technical field
The present invention relates to power generation coal-burning boiler system field, specifically a kind of gasification of biomass coupling coal unit power generation dress
It sets.
Background technique
With the continuous development of biomass generation, " gasification of biomass couples coal unit generation technology " is with its Gao Sheng
Substance energy conversion ratio and the mainstream technology route for becoming current biomass power generation convenient for the significant advantage of metering.Biomass is through gasifying
It is converted into biological fuel gas after furnace gas, biological fuel gas is then delivered to coal-burning boiler and carries out combustion power generation.
On the one hand, since biomass gasification system is complex, when coal-burning boiler needs variable load operation, biomass fuel
Gas cannot achieve similar to the flexible start and stop of coal pulverizer or fuel quantity adjustment, and when unit load down to a certain degree when, burning
Area mix fired biomass combustion gas may burning to coal-burning boiler and performance parameter affect greatly, need to stop transport gasification of biomass system
System releases coupling.
On the other hand, the demand with country to fired power generating unit flexibility is continuously increased, and current coal-burning power plant is to generator
The demand of group underrun is increasing, and with the reduction of boiler load, SCR inlet flue-gas temperature also decreases.It is de-
The minimum use temperature limit that denox catalyst requires is 300 DEG C, generally when coal unit load is lower than 45% BMCR, will be gone out
The problem of existing SCR catalyst can not be come into operation using temperature lower than limit value, especially in boiler Ultra-low load operation, existing increase
The use of the schemes such as boiler tail flue gas bypass, the bypass of economizer hot water is limited, cannot achieve effective removal of nitrogen oxide, ring
Border pollution is larger.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems of the prior art, and then provide a kind of gasification of biomass coupling
Coal unit power generator is closed, solves under ultra-low load operating condition that SCR inlet smoke temperature is low, is lower than the effective operating temperature of catalyst,
The problem of denitration can not come into operation；Biological fuel gas and fire coal under coal unit Ultra-low load operation operating condition are preferably realized simultaneously
The coupled electricity-generation of unit avoids burning and performance parameter that fired biomass combustion gas is mixed to coal-burning boiler in combustion zone under ultra-low load
Caused by influence.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of gasification of biomass couples coal unit power generator, including circle fluidized-bed gasification furnace, cyclone dust collectors, combustion gas change
Hot device, valve, gas burner A, coal-burning boiler, SCR denitration device, baffle, gas combustion chamber, gas burner B, feature
It is, the circle fluidized-bed gasification furnace, cyclone dust collectors, gas heat-exchanger are sequentially connected with by pipeline, the combustion gas
Heat exchanger exit one routes the road A gas pipeline and connects and access coal-burning boiler burner hearth by gas burner A, and another way is by the road B
Before gas pipeline connects by the gas burner B being arranged in front of SCR denitration device on horizontal flue and accesses SCR denitration device
Horizontal flue, SCR denitration device pass through the horizontal flue and coal-burning boiler coal economizer outlet, the gas burner B's
Gas combustion chamber is connected to the hot secondary air duct in the tail portion of coal-burning boiler, the hot secondary air duct in the tail portion of the coal-burning boiler with it is described
SCR denitration device exhaust pass be connected to respectively with rotary regenerative air preheater.
The gas pipeline being connected between each component, including the emptying combustion pipe point being arranged on gas heat-exchanger exhaust pass
It is not provided with valve, and is provided with combustion gas baffle in A, B two-way gas pipeline.
The beneficial effects of the present invention are: by using technical solution of the present invention,
1, electric energy is converted by Large-sized Coal-fired Power group equipment high efficiency by biomass energy, realizes the efficient utilization of biomass energy；
2, SCR inlet smoke temperature is low when solving Ultra-low load operation, is lower than the effective operating temperature of catalyst, what denitration can not come into operation
Problem, and gasification of biomass coupled electricity-generation technology is reasonably combined with Ultra-low load operation；
3, it realizes under coal unit Ultra-low load operation operating condition, the coupled electricity-generation of biological fuel gas and coal unit, greatly
Gasification of biomass coupling coal unit power generation duration is improved, power plant's biomass power generation income is improved；
4, a degree of to improve ultra-low load air preheater inlet flue gas temperature, and then hot first and second wind-warm syndrome is improved, increase mill
The drying capacity of coal machine, secondary air temperature improve the steady combustion ability that can promote in burner hearth；
5, using the high effective flue gas purification system of Large-sized Coal-fired Power group tail portion, the ultra-clean row of flue gas that biomass combustion utilizes is realized
It puts, and solution technique can be realized, equipment is easier.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Appended drawing reference in figure, 1-circle fluidized-bed gasification furnace, 2-cyclone dust collectors, 3-gas heat-exchangers, 4-valves
Door, 5-gas burner A, 6-coal-burning boilers, 7-SCR denitration devices, 8-baffles, 9-gas combustion chamber, 10- combustion gas combustion
Burner B.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in further detail: the present embodiment is being with technical solution of the present invention
Under the premise of implemented, give detailed embodiment, but protection scope of the present invention is not limited to following embodiments.
As shown in Figure 1, a kind of gasification of biomass coupling coal unit power generator involved in the present embodiment, including circulation
Fluidized-bed gasification furnace 1, cyclone dust collectors 2, gas heat-exchanger 3, valve 4, gas burner A5, coal-burning boiler 6, SCR denitration dress
Set 7, baffle 8, gas combustion chamber 9, gas burner B10, which is characterized in that the circle fluidized-bed gasification furnace 1, whirlwind remove
Dirt device 2, gas heat-exchanger 3 are sequentially connected with by pipeline, and the one routing road the A gas pipeline of the outlet of gas heat-exchanger 3 passes through
Gas burner A5 connects and accesses 6 burner hearth of coal-burning boiler, and another way is by the road B gas pipeline by being arranged in SCR denitration device 7
Gas burner B10 on preceding horizontal flue connects and accesses horizontal flue before SCR denitration device 7, and SCR denitration device 7 passes through
The horizontal flue is connected to 6 economizer exit of coal-burning boiler, the gas combustion chamber 9 of the gas burner B10 and coal-burning boiler 6
Tail portion hot secondary air duct connection, the hot secondary air duct in tail portion of the coal-burning boiler 6 and the SCR denitration device 7 export
Flue is connected to rotary regenerative air preheater respectively.
The gas pipeline being connected between each component, including the emptying combustion pipe being arranged on 3 exhaust pass of gas heat-exchanger
It is respectively arranged with valve 4, and is provided with combustion gas baffle 8 in A, B two-way gas pipeline.
Specifically, arrangement Fig. 1, biomass material is delivered into respectively by feeding system and pressure fan with gasifying agent and is followed
Ring fluidized-bed gasification furnace 1, biomass material complete gasification in circle fluidized-bed gasification furnace 1, generate 800 DEG C or so of height
The high-temperature biomass gas of warm biological fuel gas, carrying tar gas and fly ash granule successively passes through cyclone dust collectors 2 and combustion gas is changed
Hot device 3 removes fly ash granule, and reduces high-temperature biomass gas temperature；It is partially grown as contained in high-temperature biomass gas
The Precipitation Temperature of chain biomass gasification tar be lower than 350 DEG C, in order to prevent biomass coke tar heating surface condensation and blocking, most
Biological fuel gas temperature after controlling cooling eventually is greater than 400 DEG C.
It is divided into A, B two-way via gas pipeline by the low-temperature biological matter combustion gas after gas heat-exchanger 3, respectively in coal-fired pot
It is put into when 6 high and low load operation of furnace.In 6 heavy-duty service of coal-burning boiler, biological fuel gas is directly logical through the road A gas pipeline
It crosses gas burner A5 and sprays into 6 burner hearth of coal-burning boiler progress combustion heat release, quote hot Secondary Air and cook combustion adjuvant, with conventional fire coal
Boiler 6 mixes fired biomass combustion gas scheme；When coal-burning boiler 6 is run under ultra-low load, biological fuel gas is via the road B fuel gas conduit
Road is led to before boiler tail SCR denitration device 7 at horizontal flue, is quoted hot Secondary Air by hot secondary air passage and is cooked combustion adjuvant, leads to
The gas burner B10 burning being arranged at the top of horizontal flue is crossed, gas combustion chamber 9 provides the space of fuel gas buring, combustion gas
Flue gas after burning is uniformly blended into the tail flue gas of coal-burning boiler 6, can effectively improve flue gas temperature before 7 entrance of SCR denitration device
Degree, solves the problems, such as that 7 inlet flue gas temperature of SCR denitration device is low under ultra-low load operating condition.It is de- according to 6 horizontal flue SCR of coal-burning boiler
Smoke temperature before 7 entrance of nitre device, the biomass fuel tolerance that appropriate adjustment is passed through, mixing smoke temperature is in SCR after so that biological fuel gas is burnt
Denitrification apparatus 7 requires within the scope of smoke temperature.
Each road gas pipeline, including combustion gas emptying combustion pipe are respectively provided with valve 4, when circle fluidized-bed gasification furnace 1 is stopped transport
Afterwards, it can be achieved that biomass gasification system and coal unit are isolated；A, B two-way gas pipeline is provided with combustion gas baffle 8, can be real
The adjustment of coal unit gas quantity is now inputted, reserves enough buffer time for the adjustment of biomass gasification system gas production.
The foregoing is only a preferred embodiment of the present invention, these specific embodiments are all based on the present invention
Different implementations under general idea, and scope of protection of the present invention is not limited thereto, it is any to be familiar with the art
Technical staff in the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, should all cover of the invention
Within protection scope.Therefore, the scope of protection of the invention shall be subject to the scope of protection specified in the patent claim.
Claims (2)
1. a kind of gasification of biomass couples coal unit power generator, including circle fluidized-bed gasification furnace (1), cyclone dust collectors
(2), gas heat-exchanger (3), valve (4), gas burner A(5), coal-burning boiler (6), SCR denitration device (7), baffle (8),
Gas combustion chamber (9), gas burner B(10), which is characterized in that the circle fluidized-bed gasification furnace (1), cyclone dust collectors
(2), gas heat-exchanger (3) is sequentially connected with by pipeline, the one routing road A gas pipeline warp of the gas heat-exchanger (3) outlet
Cross gas burner A(5) coal-burning boiler (6) burner hearth is connected and accesses, another way is taken off by the road B gas pipeline by being arranged in SCR
Gas burner B(10 before nitre device 7 on horizontal flue) horizontal flue before SCR denitration device (7) is connected and accesses, SCR is de-
Nitre device (7) is connected to by the horizontal flue with coal-burning boiler (6) economizer exit, the gas burner B(10) combustion gas
Combustion chamber (9) is connected to the hot secondary air duct in tail portion of coal-burning boiler (6), the hot secondary air duct in tail portion of the coal-burning boiler (6)
It is connected to respectively with rotary regenerative air preheater with described SCR denitration device (7) exhaust pass.
2. gasification of biomass according to claim 1 couples coal unit power generator, which is characterized in that between each component
The gas pipeline of connection, the emptying combustion pipe including being arranged on gas heat-exchanger (3) exhaust pass are respectively arranged with valve
(4), it and in A, B two-way gas pipeline is provided with combustion gas baffle (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910058478.2A CN109705920A (en) | 2019-01-22 | 2019-01-22 | Gasification of biomass couples coal unit power generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910058478.2A CN109705920A (en) | 2019-01-22 | 2019-01-22 | Gasification of biomass couples coal unit power generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109705920A true CN109705920A (en) | 2019-05-03 |
Family
ID=66261805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910058478.2A Pending CN109705920A (en) | 2019-01-22 | 2019-01-22 | Gasification of biomass couples coal unit power generator |
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| Country | Link |
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| CN (1) | CN109705920A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958935A (en) * | 2021-10-08 | 2022-01-21 | 西安交通大学 | Flexibility transformation system for low-load operation of coal-fired power plant boiler |
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| CN106582281A (en) * | 2015-10-15 | 2017-04-26 | 中国石油化工股份有限公司 | Coal fired boiler low-load operation SCR denitration device and process thereof |
| CN107255269A (en) * | 2017-06-07 | 2017-10-17 | 国电科学技术研究院 | Station boiler system and station boiler integrate the method that gasification of biomass afterburning improves afterbody cigarette temperature |
| CN207674430U (en) * | 2017-12-22 | 2018-07-31 | 浙江大学 | A kind of recirculating fluidized bed gasification coupling coal unit peaking generation system |
| CN209652251U (en) * | 2019-01-22 | 2019-11-19 | 哈尔滨锅炉厂有限责任公司 | Gasification of biomass couples coal unit power generator |
-
2019
- 2019-01-22 CN CN201910058478.2A patent/CN109705920A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204962817U (en) * | 2015-09-08 | 2016-01-13 | 东方电气集团东方锅炉股份有限公司 | SCR flue gas denitration system that full load mode put into operation |
| CN106582281A (en) * | 2015-10-15 | 2017-04-26 | 中国石油化工股份有限公司 | Coal fired boiler low-load operation SCR denitration device and process thereof |
| CN206094003U (en) * | 2016-09-30 | 2017-04-12 | 国电科学技术研究院 | Realize that ultralow load safety ring of coal fired boiler protects degree of depth peak regulation device of operation |
| CN107255269A (en) * | 2017-06-07 | 2017-10-17 | 国电科学技术研究院 | Station boiler system and station boiler integrate the method that gasification of biomass afterburning improves afterbody cigarette temperature |
| CN207674430U (en) * | 2017-12-22 | 2018-07-31 | 浙江大学 | A kind of recirculating fluidized bed gasification coupling coal unit peaking generation system |
| CN209652251U (en) * | 2019-01-22 | 2019-11-19 | 哈尔滨锅炉厂有限责任公司 | Gasification of biomass couples coal unit power generator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958935A (en) * | 2021-10-08 | 2022-01-21 | 西安交通大学 | Flexibility transformation system for low-load operation of coal-fired power plant boiler |
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