CN106122948A - A kind of circulating combustion method of coal-burning boiler - Google Patents
A kind of circulating combustion method of coal-burning boiler Download PDFInfo
- Publication number
- CN106122948A CN106122948A CN201610491917.5A CN201610491917A CN106122948A CN 106122948 A CN106122948 A CN 106122948A CN 201610491917 A CN201610491917 A CN 201610491917A CN 106122948 A CN106122948 A CN 106122948A
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- China
- Prior art keywords
- burner
- burning
- boiler
- coal
- flue gas
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/002—Supplying water
- F23L7/005—Evaporated water; Steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2202/00—Fluegas recirculation
- F23C2202/30—Premixing fluegas with combustion air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/07009—Injection of steam into the combustion chamber
Abstract
The invention discloses a kind of circulating combustion method of coal-burning boiler, step has:: a burner is installed in boiler side, and the exhanst gas outlet of burner connects with boiler furnace；: during burning, in burner, it is passed through comburant, forced air supply in the middle part of boiler furnace；: coal dust mixes with high-temperature steam, is sent into by coal dust in burner after mixed combustion as First air, the high-temperature flue gas of generation is passed through boiler furnace；
Description
Technical field
The present invention relates to a kind of boiler combustion method, refer specifically to a kind of circulating combustion method of coal-burning boiler.
Background technology
Being widely used owing to coal-burning boiler has efficient, cheap feature, traditional coal burning mode is at coal
Combustion process can produce substantial amounts of pollutant, cause serious environmental pollution.Main cause has: one, and coal is difficult to empty
Gas is fully contacted and causes imperfect combustion, and efficiency of combustion is low, not only wastes coal resources, also relative to add pollutant
Discharge.Its two, combustion process is wayward, such as often for hypoxgia when fugitive constituent separates out in a large number, cause flue dust separate out with
Over-emitting black exhaust；During solid fuel ignition, temperature is difficult to uniformly, be easily formed district of localized hyperthermia, promotes a large amount of NOx to be formed；The most both wasted
The energy also gives environment.Its three, heat utilization rate is low, and loss is serious, does not meets existing energy-saving and emission-reduction, high-efficiency environment friendly
Demand for development.
Summary of the invention
For above-mentioned technical problem, the invention provides a kind of circulating combustion method of coal-burning boiler, it is achieved coal is at stove
Interior fully burning, efficiency of combustion is high, and the heat utilization rate of fuel and generation is high, the purpose that Pollution drainage is low.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of circulating combustion method of coal-burning boiler, specifically includes following steps:
: install a burner in furnace wall, boiler side, the exhanst gas outlet of burner connects with boiler furnace；
: during burning, in burner, it is passed through comburant, in the middle part forced air supply of boiler furnace；
: coal dust mixes with high-temperature steam, sends in burner as First air by coal dust, in burner with air and
After comburant mixing fully burning, the high-temperature flue gas of generation is passed through boiler furnace；
: high-temperature flue gas carries out second-time burning after mixing with the secondary wind being blown into burner hearth in burner hearth；The flue gas that burning is produced
Perform heat energy successively to extract, condense and purified treatment, and utilize the extracted heat energy condensed water to being obtained after condensation process
Heating is converted into water vapour, is returned by wherein part water vapour and causes burner inlet end, send as the First air mixed with coal dust
Enter burner；And the heat energy that the SAPMAC method flue gas utilization obtained is extracted is heated, then its time is caused boiler and enter
Boiler furnace is sent into as secondary wind behind air port, with oxygen mix.
Preferably, described comburant is granular material or the mixture of granular material or liquefied mixture.
Preferably, the composition of described comburant is chlorate or permanganate or nitrate or a combination thereof thing.
Preferably, stepIn, the vapor (steam) temperature as First air is 120～150 DEG C.
Preferably, stepIn, the circulating flue gas temperature as secondary wind is 180～300 DEG C.
Preferably, burner it is passed through the high-temperature flue gas flow of boiler furnace controlled.
Preferably, stepIn, when condensed water deficiency, it is also possible to directly supplement water, and utilize the heat energy of described extraction
It is heated and is converted into water vapour.
The invention has the beneficial effects as follows:
1, fuel burns in the burner, and burner is primary zone, and boiler furnace is the intermediate zone of high-temperature flue gas, and can rise
Increase the purpose of burning to dilatation, effectively realize coal-fired abundant burning, reduce the discharge of the dusty gass such as nitrogen oxides；
2, in burner, forced air inlet in comburant and burner hearth it is passed through, it is ensured that burning is carried out in oxygen enriched environment, enters one
Step ensure that the abundant burning of fuel；
3, the water vapour circulation utilizing the heating of flue gas condensing water to be generated regulates the temperature of burner Flame, can partly keep away
Exempt from the use of circulating flue gas, reduce the impact of air leakage, and can improve CO in flue gas2Capture effect；Utilize circulation cigarette
Gas, as secondary air, is effectively increased the utilization rate of heat energy；
4, rational in infrastructure, energy-conserving and environment-protective, significantly reduce the discharge of the dusty gas such as nitrogen oxides, sulfide.
Detailed description of the invention
Below in conjunction with embodiment, the present invention and effect thereof are further elaborated.
A kind of circulating combustion method of coal-burning boiler, specifically includes following steps:
: install a burner in furnace wall, boiler side, the exhanst gas outlet of burner connects with boiler furnace；
: during burning, in burner, it is passed through comburant, in the middle part forced air supply of boiler furnace；
: coal dust mixes with high-temperature steam, sends in burner as First air by coal dust, in burner with air and
After comburant mixing fully burning, the high-temperature flue gas of generation is passed through boiler furnace；Can burner and boiler furnace it
Between exhaust gases passes in smoke flow control valve door is set, reach the purpose that flue gas flow is controlled, it is ensured that fully burn；Wherein,
Comburant is granular material or the mixture of granular material or liquefied mixture, such as chlorate or permanganate or nitrate
Or a combination thereof thing, it is also possible to it is hydrogenperoxide steam generator.
: high-temperature flue gas carries out second-time burning after mixing with the secondary wind being blown into burner hearth in burner hearth；Burning is produced
Flue gas performs heat energy successively and extracts, condenses and purified treatment, and utilizes extracted heat energy cold to obtained after condensation process
Solidifying water heating is converted into water vapour, is returned by wherein part water vapour and causes burner inlet end, mixes once as with coal dust
Wind sends into burner；And the heat energy that the SAPMAC method flue gas utilization obtained is extracted is heated, then its time is caused pot
Boiler furnace is sent into as secondary wind after stove air inlet, with oxygen mix；Wherein, the vapor (steam) temperature as First air be 120～
150 DEG C, the circulating flue gas temperature as secondary wind is 180～300 DEG C.
Fuel of the present invention burns in the burner, and burner is primary zone, and boiler furnace is the second-time burning of high-temperature flue gas
District, and the purpose of dilatation increase burning can be played, effectively realize coal-fired fully burning, reduce the dusty gass such as nitrogen oxides
Discharge；Forced air inlet in comburant and burner hearth it is passed through, it is ensured that burning is carried out in oxygen enriched environment, enters one in burner
Step ensure that the abundant burning of fuel；Water vapour circulation owing to utilizing the heating of flue gas condensing water to be generated regulates in burner
The temperature of flame, compared with traditional oxygen-enriched combusting mode, can partly avoid the use of circulating flue gas, reduces air leakage
Impact, and can improve CO in flue gas2Capture effect；Be suitable to existing equipment is changed according to the combustion system of the present invention
Make, it is simple to manipulation, be enriched with CO at flue gas2While can cooperation-removal multiple pollutant, concurrently facilitate raising efficiency of combustion,
It is therefore particularly suitable for the application of pulverized-coal fired boiler or similar applications.Rational in infrastructure, energy-conserving and environment-protective, significantly reduce nitrogen oxides,
The discharge of the dusty gass such as sulfide, has preferable market using value, is suitable to popularization and application.
Above example is only exemplary, can't limit to the present invention, it should be pointed out that for those skilled in the art
For, under technology provided by the present invention is enlightened, other equivalent modifications made and improvement, it is regarded as the guarantor of the present invention
Protect scope.
Claims (7)
1. the circulating combustion method of a coal-burning boiler, it is characterised in that: specifically include following steps:
: install a burner in furnace wall, boiler side, the exhanst gas outlet of burner connects with boiler furnace；
: during burning, in burner, it is passed through comburant, in the middle part forced air supply of boiler furnace；
: coal dust mixes with high-temperature steam, sends in burner as First air by coal dust, with air and combustion in burner
After burning auxiliary agent mixing and fully burning, the high-temperature flue gas of generation is passed through boiler furnace；
: high-temperature flue gas carries out second-time burning after mixing with the secondary wind being blown into burner hearth in burner hearth；The flue gas that burning is produced
Perform heat energy successively to extract, condense and purified treatment, and utilize the extracted heat energy condensed water to being obtained after condensation process
Heating is converted into water vapour, is returned by wherein part water vapour and causes burner inlet end, send as the First air mixed with coal dust
Enter burner；And the heat energy that the SAPMAC method flue gas utilization obtained is extracted is heated, then its time is caused boiler and enter
Boiler furnace is sent into as secondary wind behind air port, with oxygen mix.
The circulating combustion method of a kind of coal-burning boiler the most according to claim 1, it is characterised in that: described comburant is
Granular material or the mixture of granular material or liquefied mixture.
The circulating combustion method of a kind of coal-burning boiler the most according to claim 2, it is characterised in that: described comburant
Composition is chlorate or permanganate or nitrate or a combination thereof thing.
4. according to the circulating combustion method of the arbitrary described a kind of coal-burning boiler of claim 1-3, it is characterised in that: step
In, the vapor (steam) temperature as First air is 120～150 DEG C.
5. according to the circulating combustion method of the arbitrary described a kind of coal-burning boiler of claim 1-3, it is characterised in that: step
In, the circulating flue gas temperature as secondary wind is 180～300 DEG C.
6. according to the circulating combustion method of the arbitrary described a kind of coal-burning boiler of claim 1-3, it is characterised in that: by burner
The high-temperature flue gas flow being passed through boiler furnace is controlled.
The circulating combustion method of a kind of coal-burning boiler the most according to claim 1, it is characterised in that: stepIn, when cold
During solidifying water deficiency, it is also possible to directly supplement water, and utilize the heat energy of described extraction to be heated to be converted into water vapour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610491917.5A CN106122948A (en) | 2016-06-29 | 2016-06-29 | A kind of circulating combustion method of coal-burning boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610491917.5A CN106122948A (en) | 2016-06-29 | 2016-06-29 | A kind of circulating combustion method of coal-burning boiler |
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| CN106122948A true CN106122948A (en) | 2016-11-16 |
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| CN201610491917.5A Pending CN106122948A (en) | 2016-06-29 | 2016-06-29 | A kind of circulating combustion method of coal-burning boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106509966A (en) * | 2016-11-29 | 2017-03-22 | 黄俊柳 | Flue-cured tobacco stove utilizing water vapor combustion and secondary combustion |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62169907A (en) * | 1986-01-21 | 1987-07-27 | Kawasaki Heavy Ind Ltd | Pulverized coal combustion boiler |
| CN101334164A (en) * | 2008-07-28 | 2008-12-31 | 上海题桥纺织染纱有限公司 | Industrial boiler combustion method |
| CN101886815A (en) * | 2010-07-13 | 2010-11-17 | 杭州电子科技大学 | Method for feeding pulverized coal in power station pulverized-coal fired boiler |
| CN103062745A (en) * | 2012-12-17 | 2013-04-24 | 华中科技大学 | Water vapor circularly adjusting type oxygen-enriched combustion method for pulverized coal boiler |
| CN104711073A (en) * | 2015-03-25 | 2015-06-17 | 张春山 | Coal combustion adjuvant and preparation method thereof |
| CN105351959A (en) * | 2015-11-09 | 2016-02-24 | 广西桂晟新能源科技有限公司 | Process for applying circulating water vapor to coal combustion boiler |
-
2016
- 2016-06-29 CN CN201610491917.5A patent/CN106122948A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62169907A (en) * | 1986-01-21 | 1987-07-27 | Kawasaki Heavy Ind Ltd | Pulverized coal combustion boiler |
| CN101334164A (en) * | 2008-07-28 | 2008-12-31 | 上海题桥纺织染纱有限公司 | Industrial boiler combustion method |
| CN101886815A (en) * | 2010-07-13 | 2010-11-17 | 杭州电子科技大学 | Method for feeding pulverized coal in power station pulverized-coal fired boiler |
| CN103062745A (en) * | 2012-12-17 | 2013-04-24 | 华中科技大学 | Water vapor circularly adjusting type oxygen-enriched combustion method for pulverized coal boiler |
| CN104711073A (en) * | 2015-03-25 | 2015-06-17 | 张春山 | Coal combustion adjuvant and preparation method thereof |
| CN105351959A (en) * | 2015-11-09 | 2016-02-24 | 广西桂晟新能源科技有限公司 | Process for applying circulating water vapor to coal combustion boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106509966A (en) * | 2016-11-29 | 2017-03-22 | 黄俊柳 | Flue-cured tobacco stove utilizing water vapor combustion and secondary combustion |
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| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161116 |
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