CN100594332C - Coal-burning boiler energy-saving method and apparatus - Google Patents
Coal-burning boiler energy-saving method and apparatus Download PDFInfo
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- CN100594332C CN100594332C CN200810126070A CN200810126070A CN100594332C CN 100594332 C CN100594332 C CN 100594332C CN 200810126070 A CN200810126070 A CN 200810126070A CN 200810126070 A CN200810126070 A CN 200810126070A CN 100594332 C CN100594332 C CN 100594332C
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Abstract
The invention relates to an energy-saving method and an energy-saving device for a coal-fired boiler. The energy-saving device comprises a gas steam transmitting pipeline, a superheater and a plurality of spray poles. The spray poles are arranged on the air-supply chamber of the boiler; a plurality of small holes are arranged on the spray poles; the small holes are arranged upward toward the coal-burning layer; the spray poles are connected with the outlet of the superheater through the pipeline or through a control valve and then the pipeline. The energy-saving method includes the proceduresthat (1) the steam is led in from the sub-cylinder of the boiler, and the steam led in is imported into the superheater, and the steam is made into 500-800 DEG dry steam; (2) the dry steam is led intothe plurality of spray poles arranged in the air supply chamber of the boiler; (3) the dry steam is blown out from the small holes of the spray poles, and then mixed and burnt with the coal-firing layer. The energy-saving method and the device is applicable to the technical innovation of the existing coal-firing boilers, particularly applicable to the existing chain boilers and fire generator boilers. And thereby, the energy-saving performance and efficiency are improved.
Description
Technical field
The present invention relates to a kind of coal-burning boiler energy-saving technology, particularly relate to the power-economizing method and the corresponding energy saver that adopt high temperature drying steam and coal mixed combustion,, reach object of energy saving to improve the efficient of boiler fired coal.
Background technology
Existing industry coal-boiler utilizes coal to add airborne oxygen combustion, and air themperature is low more, and the burning of coal effect is poor more.
The efficient of existing industry coal-boiler is lower, and efficiency of combustion is the highest only to be reached about 70%, long service time with boiler, and burning condition worsens, and efficiency of combustion can further reduce.
Therefore, in the coal-burning boiler and stove and accessory of current use, can improve efficiency of combustion, just can save the tens thousand of tons of coal in the world every day, for existing Industrial Boiler, the coal tiger that these coal consumptions of thermal power generation are big, on the basis of former useful coal, can economize on coal 20%, Quan Guo Industrial Boiler so, the thermal power plant, just can save some ten thousand tons in raw coal every day, existing domestic briquet stove if all use advanced energy-conservation coal vapour burner, not only can be saved a large amount of coal, more outstanding is to make the combustion efficiency of the flare of coal stove near liquified-gas stove, improves people's environment greatly.
Goal of the invention
The objective of the invention is to propose a kind of device that improves fired coal combustion efficient, basically do not changing under the condition of original coal-burning boiler or Range structure, by introducing dry steam and coal-fired the mixing, fully burning, make the burning ton coal steam production of boiler or stove and accessory improve 20-40% on the original basis, to reach object of energy saving.
The object of the present invention is achieved like this, and the present invention proposes a kind of coal-burning boiler energy-saving method, and the method comprising the steps of:
(1) introduces steam from the gas-distributing cylinder of boiler, and the steam of introducing is fed in the superheater of boiler, make steam become 500 ℃-800 ℃ dry steam;
(2) dry steam is fed in a plurality of spray booms in the plenum chamber be arranged on boiler;
(3) make the aperture ejection of dry steam, with the fully mixed combustion of coal-fired layer from described spray boom.
The dry steam that produces in described step 1 should be controlled at 500 ℃ of-800 ℃ of scopes.Introducing steam from the gas-distributing cylinder of boiler carries out when boiler should be in the normal combustion state.
In step 3, according to the rising of temperature in the burner hearth steam regulation evaporation capacity for engine that still descends, as find that stove hall chamber temperature rises, can transfer big evaporation capacity for engine by control valve 3, as find that stove hall temperature descends or identical with temperature before the steam supply, should finely tune the minimizing evaporation capacity for engine immediately, realize the abundant burning of coal vapour.
In step 2, described a plurality of spray booms have a spray boom to be in normally open all the time, and all the other a plurality of spray booms utilize control valve control.
The present invention also proposes a kind of coal-burning boiler energy-saving device, and this energy saver comprises:
One gas pipeline, this pipeline is connected with the gas-distributing cylinder of boiler;
One superheater, it is indoor that described superheater is arranged on boiler combustion with the form of coil pipe, and the inlet of this superheater connects gas pipeline;
A plurality of spray booms, described spray boom are arranged on the boiler plenum chamber, and spray boom has a plurality of apertures, and upwards facing to coal-fired layer, spray boom is connected with the outlet of described superheater by pipeline by pipeline or via control valve the aperture opening again;
At the boiler gas-distributing cylinder to the described gas pipeline between the described superheater, steam flowmeter, steam control valve and steam pressure gauge successively are installed in series.
To between the spray boom atmospheric valve is installed at described superheater.
Connect the outlet of described superheater and the branched pipe of spray boom and be divided into two-way, in described a plurality of spray boom, have a spray boom directly to be connected with one road branched pipe, all the other spray booms are respectively by two control valves, be connected successively with the two-way branched pipe, two control valves are installed in the outside of boiler again.
The afterbody of described a plurality of spray booms is provided with blowoff valve, and this blowoff valve is positioned at the opposite side that is in the boiler of relative position with two control valves.
Use method of the present invention and corresponding coal-saving device, realize the mixed combustion of coal vapour, on same boiler, burn the coal of same 5,000 kilocalories, ton coal steam production improves 20-30%.
The present invention does not change the structure of existing coal-burning boiler, under the condition that does not influence boiler pressure part, increases auxiliary equipments such as jet chimney superheater, steam-flow meter, valve, spray boom, and former boiler is undergone technological transformation, and has realized the energy-efficient of fire coal.
According to coal-saving method of the present invention and coal-saving device, can be used for water-tube boiler.The simple installation site that changes spray boom and superheater just can reach same result of use.
Description of drawings
Fig. 1 is the structural representation of coal-burning boiler energy-saving device of the present invention.
Among the figure
1 gas pipeline, 9 spray booms
2 steam-flow meters, 10 control valves
3 shutoff valves, 11 spray booms
4 Pressure gauges, 12 control valves
5 superheaters, 13 spray booms
6 boiler furnaces, 14 blowoff valves
7 atmospheric valves, 15 blowoff valves
8 firing chambers, 16 blowoff valves
The specific embodiment
Coal-burning boiler energy-saving method of the present invention is to put one group of superheater in that boiler combustion is indoor, the saturated vapor of boiler is transported in the superheater from gas-distributing cylinder with pipeline, because operating temperature is generally at 1130 ℃-1350 ℃ in the combustion chamber of boiler, therefore can obtain 500 ℃-800 ℃ dry steam from the exit of superheater, described dry steam, be that the vial road is behind delivering vapor, see that indoor the shell of pipeline is transformed into red as fire look by normal color daytime, and vapor (steam) temperature at this moment should be at 500 ℃ more than-800 ℃.Be connected to dry steam on the spray boom that is provided with in each air compartment of boiler with pipeline, send at each spray boom on the pipeline of dry steam control valve is housed, combustion position, control and regulation valve according to the coal seam, combustion chamber, reasonable distribution dry steam consumption, by the effect of air blast wind-force, realize the mixed combustion of coal vapour.
Use 500 ℃-800 ℃ dry steam and coal combustion among the present invention, make combustion position produce qualitative leap, according to using thermocouple measurement, 5.5 kilocalories identical coal burns, pure coal combustion temperature is 1230 ℃-1250 ℃, after adding dry steam, combustion flame temperature is that 1310 ℃-1330 ℃, flame volume can increase and are twice, and flame temperature improves 80 ℃.And according to mensuration on probation, the analysis of several industry coal-boilers, ature of coal is below 4.5 kilocalories, difficult use adds the vapour burning, 4.7 adding vapour burning steam production, a kilocalorie above ature of coal improves obviously, the above coal of 5,000 kilocalories adds the pure coal combustion ton of vapour ratio of combustion coal steam production and improves more than 20%, and the coal of 6,000 kilocalories adds the pure coal combustion ton of dry steam ratio of combustion coal steam production and improves more than 40%.According to the digital proof of practice summary, adopt method coal of the present invention to add the dry steam burning, ature of coal is good more, and the dry steam addition is big more, and ton coal steam production is high more.
Below with reference to accompanying drawing energy saver of the present invention is described in further detail.Fig. 1 is the structural representation of coal-burning boiler energy-saving device of the present invention.With reference to accompanying drawing, described energy saver picks out a gas pipeline 1 from the gas-distributing cylinder of former boiler, the steam flowmeter 2 that is installed in series successively on pipeline 1, steam control valve 3, steam pressure gauge 4, pipeline 1 become the superheater 5 of this device with the form of coil pipe in former boiler furnace 6.From the outlet of superheater 5, jet chimney is connected to the middle part of boiler, and tells two branched pipes.Adorn an atmospheric valve 7 on a branched pipe, another branched pipe is divided into two-way, and one the tunnel connects spray boom 11 successively, and control valve 10 is connected control valve 12 and spray boom 13 successively with spray boom 9, another road.Wherein, spray boom 9 is by control valve 10 controls, and spray boom 11 is a direct injection, and spray boom 13 is by control valve 12 controls.Spray boom 9,11,13 is installed on the plenum chamber of boiler roast area 8, two ends are stretched out boiler jacket, are equipped with many apertures on spray booms, eyelet is upwards facing to coal-fired layer during installation, control valve 10,12 is installed in the outside of boiler one side, blowoff valve 14,15,16 is positioned at the opposite side of boiler, is installed in the afterbody of each spray boom.
When reality was used apparatus of the present invention, this moment, boiler should be in the normal combustion state.Check atmospheric valve 7 and blowoff valve 14,15,16 earlier, confirm as closed condition, control valve 10,12 is in open mode, then slowly open control valve 3, make steam from the gas-distributing cylinder of boiler enter superheater 5 and produce dry steams, dry steam feeds spray boom 9,11,13, and many apertures from spray boom spray dry steam and coal-fired mixed combustion.Steam supply through a few minutes, if the pointer of Pressure gauge 9 keeps stable state, amplifying evaporation capacity for engine, after evaporation capacity for engine increases, should observe the boiler furnace combustion case, according to the rising of the temperature adjusting evaporation capacity for engine that still descends, rise as finding stove hall chamber temperature, can transfer big evaporation capacity for engine by control valve 3, as find that stove hall temperature descends or identical with temperature before the steam supply, should finely tune evaporation capacity for engine immediately,, realize the abundant burning of coal vapour by the adjustment of evaporation capacity for engine.
When regulating evaporation capacity for engine, can reference vapor flowmeter 2, the steam flow of these steam-flow meter 2 reflections also can be as regulating the evaporation capacity for engine reference value, and Principles of Regulation are identical with said method.
Hereinafter the operation principle to whole device describes: Boiler Steam is delivered into superheater 5 by gas pipeline 1, Boiler Steam is under the control of shutoff valve 3, flowing of regime flow, the flow of Boiler Steam shows in Pressure gauge 4, Boiler Steam is heated to temperature in heater 5 zones be 500 ℃-800 ℃, and original Boiler Steam is transformed near the high temperature drying steam that decomposes.Aperture ejection from spray boom.Enter firing chamber 8, enter the reactive combustion process.
The quantity delivered of Boiler Steam is the key that water uses with coal-fired mixed combustion in boiler, use the purpose of shutoff valve 3 can control the Boiler Steam flow exactly with frame for movement exactly, Pressure gauge 4 is the pressure that specifically shows steam, and just Boiler Steam is delivered into the flow demonstration of heater 5.As long as steam shutoff valve 3 is opened, the steam regulation flow, can be according to boiler internal roast area scope and sintering temperature, the thermal effect that adds to Boiler Steam is determined the supply flow value, guarantee that Boiler Steam in heater 5 pressure limits, is heated to suitable temperature to Boiler Steam, enter the boiler firing chamber from spout, 500 ℃-800 ℃ water vapour continues to add thermal response through the district that overdoes, can reach coal and the steam required condition of burning in reaction.
Power-economizing method of the present invention and device are applicable to the technological transformation of existing coal-burning boiler, are particularly useful for existing chain type boiler and burning hot electricity generation boiler and use, and can reach the benefit of energy efficiency.
Claims (7)
1, a kind of coal-burning boiler energy-saving method is characterized in that comprising step:
(1) introduces steam from the gas-distributing cylinder of boiler, and the steam of introducing is fed in the superheater of boiler, make steam become 500 ℃-800 ℃ dry steam;
(2) dry steam is fed in a plurality of spray booms in the plenum chamber be arranged on boiler;
(3) make the aperture ejection of dry steam, with the fully mixed combustion of coal-fired layer from described spray boom;
(4) according to the rising of temperature in the burner hearth adjusting air demand that still descends, as find that the fire box temperature rises, transfer big air demand by steam control valve (3), as finding that fire box temperature descends or identical with temperature before the air feed, should finely tune the minimizing evaporation capacity for engine immediately, realize the abundant burning of coal vapour.
2, power-economizing method according to claim 1 is characterized in that, in step 1, introduces steam from the gas-distributing cylinder of boiler and carries out when boiler has been in the normal combustion state.
3, power-economizing method according to claim 1 is characterized in that, in step 2, described a plurality of spray booms have a spray boom to be in normally open all the time, and all the other a plurality of spray booms utilize control valve control.
4, a kind of coal-burning boiler energy-saving device is characterized in that comprising:
One gas pipeline, this pipeline is connected with the gas-distributing cylinder of boiler;
One superheater, it is indoor that described superheater is arranged on boiler combustion with the form of coil pipe, and the inlet of this superheater connects gas pipeline, on described gas pipeline, the steam flowmeter that is installed in series successively, steam control valve (3) and steam pressure gauge;
A plurality of spray booms, described spray boom are arranged on the boiler plenum chamber, and spray boom has a plurality of apertures, and upwards facing to coal-fired layer, spray boom is connected with the outlet of described superheater by pipeline by pipeline or via control valve the aperture opening again.
5, energy saver according to claim 4 is characterized in that, between the spray boom atmospheric valve is installed at described superheater.
6, energy saver according to claim 4, it is characterized in that, connect the outlet of described superheater and the branched pipe of spray boom and be divided into two-way, in described a plurality of spray boom, there is a spray boom directly to be connected with one road branched pipe, all the other spray booms by two control valves, are connected with the two-way branched pipe respectively more successively, and two control valves are installed in the outside of boiler.
7, energy saver according to claim 4 is characterized in that, the afterbody of described a plurality of spray booms is provided with blowoff valve, and this blowoff valve is positioned at the opposite side that is in the boiler of relative position with two control valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810126070A CN100594332C (en) | 2008-07-03 | 2008-07-03 | Coal-burning boiler energy-saving method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810126070A CN100594332C (en) | 2008-07-03 | 2008-07-03 | Coal-burning boiler energy-saving method and apparatus |
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| Publication Number | Publication Date |
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| CN101338890A CN101338890A (en) | 2009-01-07 |
| CN100594332C true CN100594332C (en) | 2010-03-17 |
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| CN200810126070A Expired - Fee Related CN100594332C (en) | 2008-07-03 | 2008-07-03 | Coal-burning boiler energy-saving method and apparatus |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976638B (en) * | 2014-04-02 | 2018-02-13 | 杨超 | Coal-burning boiler energy-saving method and device |
| CN113028444A (en) * | 2021-03-24 | 2021-06-25 | 左为干 | Novel coal combustion technical method and device |
Citations (9)
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| GB769829A (en) * | 1954-06-02 | 1957-03-13 | Foster Wheeler Ltd | Improvements in and relating to the production of synthesis gas |
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| CN2118917U (en) * | 1991-12-13 | 1992-10-14 | 李庆升 | Self-pressure power saving strong stove |
| CN2223421Y (en) * | 1995-03-02 | 1996-03-27 | 刘东旺 | Automatic coal combustion , combustion-supporting, pollution-lowering and energy-saving apparatus |
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2008
- 2008-07-03 CN CN200810126070A patent/CN100594332C/en not_active Expired - Fee Related
Patent Citations (9)
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|---|---|---|---|---|
| GB769829A (en) * | 1954-06-02 | 1957-03-13 | Foster Wheeler Ltd | Improvements in and relating to the production of synthesis gas |
| CN2064863U (en) * | 1990-04-02 | 1990-10-31 | 徐先扬 | Multi-coal pressure fire spray coal-saving stove |
| CN2118917U (en) * | 1991-12-13 | 1992-10-14 | 李庆升 | Self-pressure power saving strong stove |
| CN2223421Y (en) * | 1995-03-02 | 1996-03-27 | 刘东旺 | Automatic coal combustion , combustion-supporting, pollution-lowering and energy-saving apparatus |
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| CN2632499Y (en) * | 2003-08-07 | 2004-08-11 | 尤潘垦 | Steam jetter of coal gasifying boiler |
| CN2699132Y (en) * | 2004-05-17 | 2005-05-11 | 李永春 | Bottom combustion normal pressure gas boiler |
| CN2791474Y (en) * | 2005-03-10 | 2006-06-28 | 姚玉兰 | Vaporized coal-fired environmental-protection energy-saving boiler |
| CN201233002Y (en) * | 2008-07-03 | 2009-05-06 | 左为干 | Energy-conserving apparatus for coal-fired boiler |
Non-Patent Citations (2)
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| 燃煤工业锅炉节煤实用技术. 刘茂俊，355-356，中国电力出版社. 2000 |
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| CN101338890A (en) | 2009-01-07 |
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Granted publication date: 20100317 Termination date: 20190703 |