CN104764006A - Swirl less-gas pulverized coal burner - Google Patents
Swirl less-gas pulverized coal burner Download PDFInfo
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- CN104764006A CN104764006A CN201510155495.XA CN201510155495A CN104764006A CN 104764006 A CN104764006 A CN 104764006A CN 201510155495 A CN201510155495 A CN 201510155495A CN 104764006 A CN104764006 A CN 104764006A
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- air
- air device
- combustion
- gas
- burner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2207/00—Ignition devices associated with burner
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a swirl less-gas pulverized coal burner. The swirl less-gas pulverized coal burner comprises a fuel gas burner, a pre-burning chamber, a burning chamber, an inner secondary air device, an outer secondary air device, and an air bellow. The axis of the burning chamber, the axis of the pre-burning chamber, the axis of the inner secondary air device, the axis of the outer secondary air device, and the axis of the air bellow are all superposed. The inner secondary air device is arranged outside the burning chamber; the outer secondary air device is arranged outside the inner secondary air device; all the previous three devices are arranged inside the air bellow. In the swirl less-gas pulverized coal burner, the pulverized coal can be ignited by consuming little gas without consuming fuel oil. The swirl less-gas pulverized coal burner is simple in structure and convenient in maintenance. The gas is easily ignited and is of a high burning temperature for igniting various types of coals, accordingly the swirl less-gas pulverized coal burner has a wider application range on the coals. The fractional combustion can be achieved with a low nitric oxide production.
Description
Technical field
The invention discloses a kind of weak breath burner impelling coal dust rotary combustion, be specifically related to the burner that can realize the igniting of micro-tolerance and low nitrogen burning.
Background technology
China is a consumption of petroleum and import big country, country encourages to promote fuel-saving technique and replace oil with coal technology, the National Development and Reform Commission clearly proposes in " energy-conservation medium-term and long-term ad hoc planning ": during next five-year-plan, the target of the industry saving and alternatives fuel oil such as electric power is 3,800 ten thousand tons.Reduce fuel consume and become the task of top priority.In recent years, power industry has carried out a large amount of technological improvement to station boiler conventional ignition mode, has occurred as the technology such as plasma ignition, tiny-oil ignition.But due to a variety of causes, all there is certain limitation in actual applications in above-mentioned each technology.
As plasma burner: Suitability of Coals is poor, surely fire weak effect, burn-off rate is low, and service life is short, system complex, and maintenance cost is high.
As micro-oil burner: burner output is little, ignition energy is low, and Suitability of Coals is poor.
In sum, above-mentioned technology is applicable to the power industry boiler of Large Copacity high parameter, there is great limitation in using in Industrial Boiler.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of eddy flow weak breath coal burner.
Technical scheme: for solving the problems of the technologies described above, a kind of eddy flow weak breath coal burner of the present invention, comprises gas burner, combustion chamber, inner second air device and outer second air device;
Described weak breath burning dress device comprises gas burner, combustion-supporting airduct, and the natural gas in combustion chamber is lighted by described igniter;
Described combustion chamber comprises wind powder entrance, precombustion chamber, elementary inspissator, final stage inspissator successively by wind powder trend and is located at the inner second air device of combustor exit, the outer second air device be located at outside inner second air device, and described precombustion chamber is connected with gas burner;
The inner second air adjuster that described inner second air device comprises the inner second air cylinder be located at outside combustion chamber, is located at interior two cyclones between inner second air cylinder and combustion chamber and is located at outside inner second air cylinder;
The outer second air adjusting rod that described outer second air device comprises the outer second air cylinder be located at outside inner second air cylinder, is located at outer two cyclones in outer second air cylinder and is connected with outer two cyclones; Secondary air box is provided with outside described inner second air device and outer second air device.
In the present invention during boiler ignition start, utilize the thermal-flame that combustion of natural gas produces, make the Pulverized Coal through the coal dust center of this flame obtain rapid cleavage burning, combustion flame is after elementary inspissator, final stage inspissator, because coal powder density is improved, burn stronger; Subsequently, combustion flame is through inner second air spout, and being subject to inner second air swirling eddy at this affects and passive rotation, the oxygen that simultaneously stability inner second air supplements, and burning is more strong, and ignition temperature is higher; Finally, combustion flame, through outer second air spout, is subject to the impact of outer second air swirling eddy and flame at this and rotates and strengthened, the oxygen that simultaneously stability outer second air supplements, and burning is more strong and thoroughly.By a series of overheavy firing, ensure that primary wind and powder normal combustion when consuming a small amount of natural gas, realizing weak breath igniting and steady combustion, saving ignition of the boiler and stable combustion oil.
Beneficial effect: the present invention, for conventional burners, can not only realize the burning of a small amount of natural gas fired, can also realize efficient low nitrogen burning by swirling eddy; The invention solves that the technical program solves that plasma burner input cost is high, coal adaptability is poor, power consumption is high, service life is short, system complex and the shortcoming such as maintenance cost is high; Solve tiny-oil ignition rifle to exert oneself little, that ignition energy is low and coal adaptability is poor problem.The present invention only consumes a small amount of natural gas just can firing coal-dust, and coal dust firing is oil consumption not, has higher economic benefit; Its structure is simple, and maintenance cost is low; Natural gas easily lights and ignition temperature is high, can light all kinds of coal, has the wider coal scope of application; Secondary Air classification is sent into, fractional combustion, and reduce the generation of combustion phases nitrogen oxide, can realize low nitrogen burning, environmental benefit is obvious; Secondary Air eddy flow participates in burning, and combustion flame is more stable, has certain for steady combustion effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, a kind of eddy flow weak breath coal burner, comprise gas burner 1, combustion chamber 11, inner second air device 13, outer second air device 12 and secondary air box 5, the axial line of combustion chamber 11, inner second air device 13, outer second air device 12 and secondary air box 5 is all overlapping.Being inner second air device 13 outside combustion chamber 11, is outer second air device 12 outside inner second air device 13, and first three is all in secondary air box 5.
Wherein, gas burner is enabled high-energy igniter 3 after throwing gas and is lighted natural gas, forms the flame of centre of high temperature, further firing coal-dust.
Combustion chamber 11 flows to along wind powder and is followed successively by: wind powder entrance, channel bend, precombustion chamber 6, elementary inspissator 7, final stage inspissator 10, inner second air spray 15, outer second air spout 16.
Wherein, combustion chamber Main Function: conveying First air and coal dust; Realize coal dust and mix combining combustion at precombustion chamber 6 and natural gas; By collision separation principle, after combustion medium is by elementary inspissator 7, final stage inspissator 10, concentrated step by step, overheavy firing;
Inner second air device 13, inner second air device 13 is made up of inner second air cylinder, interior two cyclones 8 and inner second air adjuster 14.
Inner second air device 13 major function: made the inner second air generation eddy flow filled into by cyclone 8, vortex gas-flow enters primary air piping, drives primary wind and powder to rotate, realizes one-level swirl flow combustion; Inner second air air quantity can be regulated by inner second air adjuster 14, and then regulate burning.Inner second air, outside combustion chamber, cools primary air piping, prevents burner wall overtemperature.
Outer second air device 12, outer second air device is made up of outer second air cylinder, outer two cyclones 9 and outer second air adjuster 4.
Outer second air device 12 major function: made the outer second air generation eddy flow filled into by cyclone 9, vortex gas-flow enters combustion chamber, strengthens primary wind and powder and rotates, realize secondary swirl flow combustion; Outer two cyclone 9 anglecs of rotation can be regulated by outer second air adjuster 4, and then regulate outer second air air quantity and spin intensity, and then regulate burning.
Secondary air box 5, secondary air box 5 is shell structure, and Secondary Air is assigned to inner second air device 13 and outer second air device 12 respectively in bellows 5.
Under to be specific embodiment of the invention process:
In the steam line of gas burner 1, add natural gas, start high-energy firing gun 3 and light natural gas.
Pass into quantitative combustion air from combustion air pipeline 2, combustion air fully mixes in precombustion chamber 6 with natural gas, natural gas Thorough combustion, forms high temp fire core; Eventually pass outer second air spout 16, pass into a certain amount of rotation outer second air at this.
After Flame of Natural Gas is stable, take First air as carrier, add coal dust from primary wind and powder entrance.In precombustion chamber 6, part coal dust and Flame of Natural Gas mix rapidly and cracking is burnt.
Inner second air spout 15 is arrived respectively through elementary inspissator 7, final stage inspissator 10 from precombustion chamber 6 pulverized coal flame out, a certain amount of rotation inner second air is passed at this, pulverized coal flame is rotated, forms internal layer swirl flame, coal dust and flame are wrapped in internal layer and rotate high-temperature region.Subsequently, regulate inner second air passage aperture by inner second air adjuster 14, and then regulate inner second air air quantity.
Introduce and the homodromal outer second air of inner second air through outer second air spout 16 outside inner second air spout 15, outer second air acts on internal layer swirl flame, strengthens flame and rotates, the mixing of strengthening coal dust and air, fill into sufficient oxygen amount, impel coal dust Thorough combustion.Subsequently, the anglec of rotation of outer two cyclones 9 can be regulated by outer second air adjusting rod 4, to regulate outer second air air quantity, the outer second air anglec of rotation and wind speed, realize the adjustment of outer second air swirl strength, thus regulate swirl flame.
The present embodiment, through rationalization's burning wind, realizes the fractional combustion of coal dust, effectively can reduce the generation of nitrogen oxide, reduce nitrogen discharged.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. an eddy flow weak breath coal burner, is characterized in that: comprise fuel gas combustion system, combustion chamber (11), inner second air device (13) and outer second air device (12);
Described fuel gas combustion system comprises gas burner (1), igniter (3), combustion-supporting airduct (2), and the natural gas in gas burner (1) is lighted by described igniter (3), and combustion-supporting airduct (2) provides oxygen amount for combustion of natural gas;
Described combustion chamber (11) is followed successively by wind powder entrance, precombustion chamber (6), elementary inspissator (7), final stage inspissator (10), inner second air spout (15), outer second air spout (16) by wind powder trend;
Described inner second air device (13) comprises the inner second air adjuster (14) being located at combustion chamber (11) inner second air cylinder outward, being located at interior two cyclones (8) between inner second air cylinder and combustion chamber (11) and being located at outside inner second air cylinder;
The outer second air adjusting rod (4) that described outer second air device (12) comprises the outer second air cylinder be located at outside inner second air cylinder, is located at outer two cyclones (9) of outer second air cylinder one end and is connected with outer two cyclones (9);
Outer second air case (5) is provided with outside described inner second air device (13) and outer second air device (12).
2. eddy flow weak breath coal powder burner according to claim 1, is characterized in that: described igniter (3) is high-energy igniter.
3. eddy flow weak breath coal powder burner according to claim 1, is characterized in that: the axial line of precombustion chamber (6), combustion chamber (11), inner second air device (13), outer second air device (12) and secondary air bellow (5) is all overlapping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510155495.XA CN104764006A (en) | 2015-04-03 | 2015-04-03 | Swirl less-gas pulverized coal burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510155495.XA CN104764006A (en) | 2015-04-03 | 2015-04-03 | Swirl less-gas pulverized coal burner |
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| CN104764006A true CN104764006A (en) | 2015-07-08 |
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| CN201510155495.XA Pending CN104764006A (en) | 2015-04-03 | 2015-04-03 | Swirl less-gas pulverized coal burner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882844A (en) * | 2019-03-06 | 2019-06-14 | 北京神科博斯热能工程技术有限公司 | A kind of efficiency material ginseng combusts burner |
| CN114001350A (en) * | 2021-11-15 | 2022-02-01 | 西安热工研究院有限公司 | Novel direct-current combustor and control method thereof |
Citations (6)
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| CN201547766U (en) * | 2009-12-08 | 2010-08-11 | 黑龙江省电力科学研究院 | Rotational flow ignition pulverized coal combustor |
| CN101832550A (en) * | 2010-06-18 | 2010-09-15 | 上海交通大学 | Swirl pulverized-coal burner based on multi-level pulverized-coal concentration |
| JP2011127866A (en) * | 2009-12-21 | 2011-06-30 | Ihi Corp | Pulverized coal burner |
| CN203718767U (en) * | 2014-01-13 | 2014-07-16 | 徐州燃控科技股份有限公司 | Oil/gas saving ignition stable-combustion low-nitrogen swirl pulverized coal burner |
| CN104344404A (en) * | 2014-11-13 | 2015-02-11 | 李延新 | Low-nitrogen type pulverized coal combustion machine without requirement for continuous ignition source |
| CN204786377U (en) * | 2015-04-03 | 2015-11-18 | 南京创能电力科技开发有限公司 | Whirl weak breath coal burner |
-
2015
- 2015-04-03 CN CN201510155495.XA patent/CN104764006A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201547766U (en) * | 2009-12-08 | 2010-08-11 | 黑龙江省电力科学研究院 | Rotational flow ignition pulverized coal combustor |
| JP2011127866A (en) * | 2009-12-21 | 2011-06-30 | Ihi Corp | Pulverized coal burner |
| CN101832550A (en) * | 2010-06-18 | 2010-09-15 | 上海交通大学 | Swirl pulverized-coal burner based on multi-level pulverized-coal concentration |
| CN203718767U (en) * | 2014-01-13 | 2014-07-16 | 徐州燃控科技股份有限公司 | Oil/gas saving ignition stable-combustion low-nitrogen swirl pulverized coal burner |
| CN104344404A (en) * | 2014-11-13 | 2015-02-11 | 李延新 | Low-nitrogen type pulverized coal combustion machine without requirement for continuous ignition source |
| CN204786377U (en) * | 2015-04-03 | 2015-11-18 | 南京创能电力科技开发有限公司 | Whirl weak breath coal burner |
Non-Patent Citations (1)
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| 还博文: "《锅炉燃烧理论与应用》", 30 September 1999 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882844A (en) * | 2019-03-06 | 2019-06-14 | 北京神科博斯热能工程技术有限公司 | A kind of efficiency material ginseng combusts burner |
| CN114001350A (en) * | 2021-11-15 | 2022-02-01 | 西安热工研究院有限公司 | Novel direct-current combustor and control method thereof |
| CN114001350B (en) * | 2021-11-15 | 2024-01-23 | 西安热工研究院有限公司 | Control method of direct current burner |
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Application publication date: 20150708 |