CN103148513A - Biomass pyrolysis double fluidized bed ignition system and working method thereof - Google Patents
Biomass pyrolysis double fluidized bed ignition system and working method thereof Download PDFInfo
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- CN103148513A CN103148513A CN2013100756245A CN201310075624A CN103148513A CN 103148513 A CN103148513 A CN 103148513A CN 2013100756245 A CN2013100756245 A CN 2013100756245A CN 201310075624 A CN201310075624 A CN 201310075624A CN 103148513 A CN103148513 A CN 103148513A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
The invention belongs to the technical field of new ignition methods of power station boilers, and in particular relates to a biomass pyrolysis double fluidized bed ignition system and a working method thereof. The system consists of a reaction device and a boiler ignition device, wherein the reaction device consists of a combustor, a flue gas separator, a first material returning valve, a pyrolyzer, a second material returning valve, a gas separator, a hot auger and a high-temperature gas fan; and the boiler ignition device comprises a boiler combustor, a hearth and a gas igniter. The high-temperature biomass gas passes through the igniter on the bottommost layer of the boiler and enters the hearth to be combusted, and pulverized coal discharged from the combustor is ignited after the gas is combusted to reach the combustion temperature of the pulverized coal, so that the boiler ignition aim is fulfilled. The system can provide high-temperature gas for the high-capacity pulverized coal boiler ignition stage of a power plant, replaces the traditional oil ignition mode and solves the problem about energy emergency.
Description
Technical field
The invention belongs to station boiler igniting new method technical field, particularly the double-fluidized-bed ignition system of a kind of biomass pyrolytic and method of work thereof.
Background technology
The main sparking mode of boiler for high power station has grease gun igniting and plasma ignition at present.The boiler for high power station tradition adopts the direct combusting heavy oil igniting of oil gun, and plasma ignition is the new technology that develops in recent years.
Present sparking mode mainly contains:
(1) mode of grease gun igniting adopts the igniting of the direct combusting heavy oil of oil gun, and fuel consumption is very large, 400 tons of the annual igniting of 300 MW unit boilers oil consumptions, and 600 MW unit boilers igniting once need 300 tons of oil consumptions.
(2) plasma ignition is to utilize plasma generator that air ionization is the yin, yang particle, and produces betwixt high-temperature electric arc, thus the firing technique of direct firing coal-dust.The mode of plasma ignition is relatively poor to the adaptability of coal, still has certain difficulty when lighting the lower meager coal of volatile matter and colm.
China is large agricultural country, and biomass resource is abundanter, and the output of often being only the 4 biolobic material resources such as agricultural crop straw, fuel wood, animal wastes and house refuse just is equivalent to 7.8 hundred million tons of mark coal energy, China's total energy consumption in 2000 reach 50% more than.Therefore how effectively to utilize living beings to cause gradually people's concern.
There is following problem in present biomass pyrolysis device:
(1) the semicoke density of biomass pyrolytic formation is light, and seldom a part enters in burning bed with the bed material, and major part is carried discharge by combustion gas, has caused and has polluted and waste.Therefore, need to separate semicoke from combustion gas, send back in burner.
(2) adopt water vapour as fluidizing reagent in pyrolysis apparatus commonly used, the conversion ratio of water vapour reduces system effectiveness less than 10%, and the steam of wasting water.
(3) in two returning charge valves, due to existing of the dipleg that forms with moving bed, make the fluidizing agent of returning charge valve need higher pressure (greater than 50 kPa), the pressure of high-temperature fuel gas (being not more than 10 kPa) does not satisfy, thereby can not be as the fluidizing agent of returning charge valve.
Summary of the invention
Not enough for prior art, the invention provides the double-fluidized-bed ignition system of a kind of biomass pyrolytic and method of work thereof.
The double-fluidized-bed ignition system of a kind of biomass pyrolytic, it is by reaction unit and ignition of the boiler installation composition;
In its reaction unit, the outlet on burner top is connected with smoke separator, and exhanst gas outlet is established on described smoke separator top, and the lower end is connected with the upper entrance of pyrolysis apparatus by the first returning charge valve; The lower part outlet of described pyrolysis apparatus is connected with the entrance of burner bottom by the second returning charge valve; The outlet on pyrolysis apparatus top is connected with degassing chamber; The upper end of degassing chamber is gas outlet, and the lower end is connected with the bottom entrance of burner by hot screw feeder; Gas outlet is divided into two branch roads, and wherein a branch road is connected with the bottom of pyrolysis apparatus by the high-temperature fuel gas blower fan; The bottom of described burner arranges air intake, and the bottom of described the first returning charge valve and the second returning charge valve arranges steam entry;
3 ~ 5 layers of boiler-burner of layout of boiler in the ignition of the boiler device, be separately positioned on the front-back wall water-cooling wall of burner hearth, 4 ~ 8 boiler-burners are set respectively on the front-back wall water-cooling wall of every layer of burner hearth, wherein on undermost each boiler-burner, a gas igniter are set all;
The orlop boiler-burner is apart from 3 ~ 4 meters of boiler furnace hoppers, and the spacing between each layer boiler-burner is 2.5 ~ 3.5 meters, and the spacing in every layer of boiler-burner between each boiler-burner is 3.5 ~ 4.5 meters;
In reaction unit, another branch road of gas outlet is connected with the undermost burner of boiler in the ignition of the boiler device.
The method of work of the double-fluidized-bed reactor ignition system of a kind of biomass pyrolytic, its concrete scheme is as follows:
Biomass feeding enters from the bottom of burner, and after air burning, the semicoke that obtains and flue gas enter smoke separator and separate, and semicoke sinks to entering in pyrolysis apparatus by the first returning charge valve, and flue gas is from smoke separator top exhanst gas outlet discharge; The pyrolysis in pyrolysis apparatus of biomass feeding and semicoke, the fraction semicoke is taken in the combustion gas of generation out of, and enters degassing chamber; Another part not biomass material of complete reaction is sent burner back to by the second returning charge valve and is recycled; In degassing chamber, the semicoke of solid sinks to being sent back in burner by hot screw feeder and recycles, and combustion gas is sent from degassing chamber top gas pipeline; Pass into the hyperthermia and superheating water vapour in the first returning charge valve and the second returning charge valve, as the fluidizing agent of two returning charge valves; Send back in pyrolysis apparatus by the high-temperature fuel gas blower fan from the combustion gas part that gas pipeline is sent, as the fluidizing agent of pyrolysis apparatus; High-temperature biomass gas enters the burner hearth internal combustion by the undermost gas igniter of boiler, and fuel gas buring is lighted from boiler-burner coal dust out after reaching the ignition temperature of coal dust, thereby reaches the purpose of ignition of the boiler.
400 ℃ of conveyings of high temperature are adopted in combustion gas, can utilize the high temperature sensible heat of biological fuel gas.
The combustion gas volume flow of every boiler-burner utilization is 4000 m
3/ h.
Beneficial effect of the present invention is:
The new method that the present invention adopts biological fuel gas to carry out the boiler for high power station igniting adopts higher thermal value (12 MJ/Nm
3~ 15 MJ/Nm
3) biological fuel gas, boiler for high power station is lighted a fire, the double-fluidized-bed reactor assembly of biomass pyrolytic adopts unique double-fluidized-bed structure, pyrolysis apparatus adopts high-temperature fuel gas as fluidizing agent, can obtain the combustion gas of high heating value, make high-temperature fuel gas and light a fire for boiler for high power station by the ignition of the boiler device.The present invention can provide high-temperature fuel gas for power plant in the large capacity pulverized coal boiler ignition stage, replaces the mode of traditional oil drop fire, solves the energy-intensive problem.
Description of drawings
Fig. 1 is reaction unit structural representation of the present invention;
Fig. 2 is ignition device structure schematic diagram of the present invention;
Fig. 3 is igniter A-A face top view of the present invention;
Number in the figure: 1-burner; The 2-smoke separator; 3-the first returning charge valve; The 4-pyrolysis apparatus; 5-the second returning charge valve; The 6-degassing chamber; The hot screw feeder of 7-; 8-high-temperature fuel gas blower fan; The 9-gas igniter; The 10-boiler-burner; The 11-burner hearth.
The specific embodiment
The invention provides the double-fluidized-bed ignition system of a kind of biomass pyrolytic and method of work thereof, the present invention will be further described below in conjunction with the drawings and specific embodiments.
The double-fluidized-bed ignition system of a kind of biomass pyrolytic, it is by reaction unit and ignition of the boiler installation composition;
In its reaction unit, the outlet on burner 1 top is connected with smoke separator 2, and exhanst gas outlet is established on described smoke separator 2 tops, and the lower end is connected with the upper entrance of pyrolysis apparatus 4 by the first returning charge valve 3; The lower part outlet of described pyrolysis apparatus 4 is connected with the entrance of burner 1 bottom by the second returning charge valve 5; The outlet on pyrolysis apparatus 4 tops is connected with degassing chamber 6; The upper end of degassing chamber 6 is gas outlet, and the lower end is connected with the bottom entrance of burner 1 by hot screw feeder 7; Gas outlet is divided into two branch roads, and wherein a branch road is connected with the bottom of pyrolysis apparatus 4 by high-temperature fuel gas blower fan 8; The bottom of described burner 1 arranges air intake, and the bottom of described the first returning charge valve 3 and the second returning charge valve 5 arranges steam entry;
3 ~ 5 layers of boiler-burner 10 of layout of boiler in the ignition of the boiler device, be separately positioned on the front-back wall water-cooling wall of burner hearth 11,4 ~ 8 boiler-burners 10 are set respectively on the front-back wall water-cooling wall of every layer of burner hearth 11, wherein on undermost each boiler-burner 10, a gas igniter 9 are set all;
Orlop boiler-burner 10 is apart from 3 ~ 4 meters of boiler furnace hoppers, and the spacing between each layer boiler-burner 10 is 2.5 ~ 3.5 meters, 3.5 ~ 4.5 meters of the spacings in every layer of boiler-burner between each boiler-burner;
In reaction unit, another branch road of gas outlet is connected with the undermost burner 10 of boiler in the ignition of the boiler device.
The method of work of the double-fluidized-bed reactor ignition system of a kind of biomass pyrolytic, its concrete scheme is as follows:
Biomass feeding enters from the bottom of burner 1, and after air burning, the semicoke that obtains and flue gas enter smoke separator 2 and separate, and semicoke sinks to entering in pyrolysis apparatus 4 by the first returning charge valve 3, and flue gas is discharged from smoke separator 2 top exhanst gas outlets.The pyrolysis in pyrolysis apparatus of biomass feeding and semicoke, the fraction semicoke is taken in the combustion gas of generation out of, and enters degassing chamber 6; Another part not biomass material of complete reaction is sent burner 1 back to by the second returning charge valve 5 and is recycled.In degassing chamber 6, the sinking of the semicoke of solid is sent back in burner 1 by hot screw feeder 7 and is recycled, and combustion gas is sent from degassing chamber 6 top gas pipelines.Pass into the hyperthermia and superheating water vapour in the first returning charge valve 3 and the second returning charge valve 5, as the fluidizing agent of two returning charge valves.Send back in pyrolysis apparatus 4 by high-temperature fuel gas blower fan 8 from the combustion gas part that gas pipeline is sent, as the fluidizing agent of pyrolysis apparatus 4.High-temperature biomass gas enters burner hearth 11 internal combustion by boiler orlop igniter gas gun 9, and fuel gas buring is lighted from boiler-burner 10 coal dust out after reaching the ignition temperature of coal dust, thereby reaches the purpose of ignition of the boiler.
400 ℃ of conveyings of high temperature are adopted in combustion gas, can utilize the high temperature sensible heat of biological fuel gas.
The combustion gas volume flow of every boiler-burner 10 utilizations is 4000 m
3/ h.
The new method that the present invention adopts biological fuel gas to carry out the boiler for high power station igniting adopts higher thermal value (12 MJ/Nm
3~ 15 MJ/Nm
3) biological fuel gas, boiler for high power station is lighted a fire, the double-fluidized-bed reactor assembly of biomass pyrolytic adopts unique double-fluidized-bed structure, pyrolysis apparatus adopts high-temperature fuel gas as fluidizing agent, can obtain the combustion gas of high heating value, make high-temperature fuel gas and light a fire for boiler for high power station by the ignition of the boiler device.The present invention can provide high-temperature fuel gas for power plant in the large capacity pulverized coal boiler ignition stage, replaces the mode of traditional oil drop fire, solves the energy-intensive problem.
Claims (4)
1. double-fluidized-bed ignition system of biomass pyrolytic, it is characterized in that: this system is by reaction unit and ignition of the boiler installation composition;
The outlet on burner in its reaction unit (1) top is connected with smoke separator (2), and exhanst gas outlet is established on described smoke separator (2) top, and the lower end is connected with the upper entrance of pyrolysis apparatus (4) by the first returning charge valve (3); The lower part outlet of described pyrolysis apparatus (4) is connected with the entrance of burner (1) bottom by the second returning charge valve (5); The outlet on pyrolysis apparatus (4) top is connected with degassing chamber (6); The upper end of degassing chamber (6) is gas outlet, and the lower end is connected with the bottom entrance of burner (1) by hot screw feeder (7); Gas outlet is divided into two branch roads, and wherein a branch road is connected with the bottom of pyrolysis apparatus (4) by high-temperature fuel gas blower fan (8); The bottom of described burner (1) arranges air intake, and the bottom of described the first returning charge valve (3) and the second returning charge valve (5) arranges steam entry;
In the ignition of the boiler device, boiler arranges 3 ~ 5 layers of boiler-burner (10), be separately positioned on the front-back wall water-cooling wall of burner hearth (11), 4 ~ 8 boiler-burners (10) are set respectively on the front-back wall water-cooling wall of every layer of burner hearth (11), wherein on undermost each boiler-burner (10), a gas igniter (9) are set all;
Orlop boiler-burner (10) is apart from 3 ~ 4 meters of boiler furnace hoppers, and the spacing between each layer boiler-burner (10) is 2.5 ~ 3.5 meters, and the spacing in every layer of boiler-burner (10) between each boiler-burner (10) is 3.5 ~ 4.5 meters;
In reaction unit, another branch road of gas outlet is connected with the undermost burner of boiler (10) in the ignition of the boiler device.
2. the method for work of the double-fluidized-bed reactor ignition system of biomass pyrolytic, is characterized in that, concrete scheme is as follows:
Biomass feeding enters from the bottom of burner, and after air burning, the semicoke that obtains and flue gas enter smoke separator and separate, and semicoke sinks to entering in pyrolysis apparatus by the first returning charge valve, and flue gas is from smoke separator top exhanst gas outlet discharge; The pyrolysis in pyrolysis apparatus of biomass feeding and semicoke, the fraction semicoke is taken in the combustion gas of generation out of, and enters degassing chamber; Another part not biomass material of complete reaction is sent burner back to by the second returning charge valve and is recycled; In degassing chamber, the semicoke of solid sinks to being sent back in burner by hot screw feeder and recycles, and combustion gas is sent from degassing chamber top gas pipeline; Pass into the hyperthermia and superheating water vapour in the first returning charge valve and the second returning charge valve, as the fluidizing agent of two returning charge valves; Send back in pyrolysis apparatus by the high-temperature fuel gas blower fan from the combustion gas part that gas pipeline is sent, as the fluidizing agent of pyrolysis apparatus; High-temperature biomass gas enters the burner hearth internal combustion by the undermost gas igniter of boiler, and fuel gas buring reaches to be lighted after the ignition temperature of coal dust from boiler-burner coal dust out, thereby reaches the purpose of ignition of the boiler.
3. method according to claim 2 is characterized in that: 400 ℃ of conveyings of high temperature are adopted in combustion gas, can utilize the high temperature sensible heat of biological fuel gas.
4. method according to claim 2, it is characterized in that: the combustion gas volume flow of every boiler-burner utilization is 4000 m
3/ h.
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| CN2013100756245A CN103148513A (en) | 2013-03-07 | 2013-03-07 | Biomass pyrolysis double fluidized bed ignition system and working method thereof |
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| CN2013100756245A CN103148513A (en) | 2013-03-07 | 2013-03-07 | Biomass pyrolysis double fluidized bed ignition system and working method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631028A (en) * | 2018-12-10 | 2019-04-16 | 黔西县黔希煤化工投资有限责任公司 | A kind of fluidized-bed combustion boiler opens furnace heating control mode and its application |
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| CN1074699A (en) * | 1992-01-23 | 1993-07-28 | 浙江大学 | Circulation fluidized-bed gas-steam combine producing process and device |
| CN1786111A (en) * | 2005-11-25 | 2006-06-14 | 清华大学 | Method and device for preparing fuel gas from biomass/domestic garbage double bed type heat decomposition |
| CN102277200A (en) * | 2011-07-05 | 2011-12-14 | 舒克孝 | Method for preparing coal gas by virtue of pulverized coal grading gasification |
| CN202203950U (en) * | 2011-07-25 | 2012-04-25 | 北京华顺达环保有限公司 | Organic solid waste pyrolyzation and gasification device |
| CN203116087U (en) * | 2013-03-07 | 2013-08-07 | 华北电力大学（保定） | Biomass pyrolysis double-fluidized-bed ignition system |
-
2013
- 2013-03-07 CN CN2013100756245A patent/CN103148513A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074699A (en) * | 1992-01-23 | 1993-07-28 | 浙江大学 | Circulation fluidized-bed gas-steam combine producing process and device |
| CN1786111A (en) * | 2005-11-25 | 2006-06-14 | 清华大学 | Method and device for preparing fuel gas from biomass/domestic garbage double bed type heat decomposition |
| CN102277200A (en) * | 2011-07-05 | 2011-12-14 | 舒克孝 | Method for preparing coal gas by virtue of pulverized coal grading gasification |
| CN202203950U (en) * | 2011-07-25 | 2012-04-25 | 北京华顺达环保有限公司 | Organic solid waste pyrolyzation and gasification device |
| CN203116087U (en) * | 2013-03-07 | 2013-08-07 | 华北电力大学（保定） | Biomass pyrolysis double-fluidized-bed ignition system |
Non-Patent Citations (1)
| Title |
|---|
| 王延长: "《现代科研后勤管理手册》", 31 March 1994, article "663-664页" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631028A (en) * | 2018-12-10 | 2019-04-16 | 黔西县黔希煤化工投资有限责任公司 | A kind of fluidized-bed combustion boiler opens furnace heating control mode and its application |
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Application publication date: 20130612 |