CN104515126A - Multi-fuel combined combustion industrial boiler - Google Patents
Multi-fuel combined combustion industrial boiler Download PDFInfo
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- CN104515126A CN104515126A CN201410811199.6A CN201410811199A CN104515126A CN 104515126 A CN104515126 A CN 104515126A CN 201410811199 A CN201410811199 A CN 201410811199A CN 104515126 A CN104515126 A CN 104515126A
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Abstract
The invention discloses a multi-fuel combined combustion industrial boiler, relates to an industrial boiler and solves the problems of single fuel, poor adaptability, low heat efficiency and high pollutant discharge of an existing industrial boiler. The multi-fuel combined combustion industrial boiler comprises a front coal pulverizing system, a grate, a hearth, a water cooled wall and at least one combustor, the front coal pulverizing system comprises a screen and a coal mill which are mounted below a coal bucket, an inclined pipeline is mounted at one end of the screen, the tail end of the pipeline is fixed above the grate, the lower portion of the screen is communicated with an inlet of the coal mill through a pipeline, the combustors are fixed in the hearth, pulverized coal conveying pipes on the combustors are connected with the coal mill, the hearth forms a uptake flue, the periphery of the hearth is a full-membrane water cooling wall, convection tube banks are arranged in a horizontal flue, a down-take flue is arranged in the rear of the hearth, and flue gas tail waste heat recovery devices are arranged in the flues. The multi-fuel combined combustion industrial boiler is stable in combustion, clean, environmentally friendly, high in efficiency, wide in fuel adaptability, flexible to adjust, and energy is saved.
Description
Technical field
The present invention relates to Industrial Boiler, be specifically related to a kind of multi fuel compound combustion Industrial Boiler.
Background technology
China is the country of rich coal, oil-poor, weak breath, about 85% is being accounted for coal-burned industrial boiler in Industrial Boiler, year consumes about 700,000,000 tons, coal, this more than 70% is wherein the chain furnace adopting the operational efficiency of grate firing mode low, the evenly heat efficiency of industrial boilers in China is caused to be only 60-65%, 15-20 percentage point lower than international most advanced level, serious waste of resources.
Coal burning is attended by the discharge of the atmosphere pollutions such as a large amount of dust, sulfur dioxide, nitrogen oxide, seriously polluted, so coal-burned industrial boiler, is especially used alone the chain-grate boiler of grate firing mode, there is the serious wasting of resources and problem of environmental pollution; Fuel-oil or fuel-gas boiler has the advantages such as the thermal efficiency is high, pollutant emission is low, but the oil of China, natural gas resource do not enrich, and needs to rely on energy importation, exists and supplies the problems such as unstable and expensive; The living beings such as agricultural crop straw, branch, wood chip also can be used as boiler oil, but there is the shortcomings such as calorific value is low, particle is large when this class A fuel A burns separately.So far, also do not have a kind ofly to utilize the Industrial Boiler that powder, gas, liquid are fuel simultaneously.
In order to solve the above-mentioned shortcoming that prior art exists, the invention provides a kind of Industrial Boiler of new structure.
Summary of the invention
The present invention is to solve the problem that existing Industrial Boiler fuel is single, bad adaptability, the thermal efficiency are low, disposal of pollutants is high, and provides a kind of multi fuel compound combustion Industrial Boiler.
The present invention is achieved by the following technical solutions:
A kind of multi fuel compound combustion Industrial Boiler, comprises stokehold pulverized coal preparation system, fire grate, burner hearth, water-cooling wall, burner; Wherein said stokehold pulverized coal preparation system comprises and is arranged on screen cloth below coal bunker and coal pulverizer, and one end of screen cloth is provided with the pipeline of inclination, and the end of pipeline is fixed on the top of fire grate, and the below of screen cloth is by the inlet communication of pipeline and coal pulverizer; Described burner hearth internal fixtion has at least one burner, and the coal dust carrier pipe on burner is communicated with coal pulverizer; Described burner hearth forms uptake flue, and surrounding is full fin panel casing, is furnished with convection bank in horizontal flue, and burner hearth rear portion is down pass, is furnished with flue gas afterbody waste-heat recovery device in flue.
Described flue gas afterbody waste-heat recovery device comprises air preheater and economizer.
Described burner is multifunctional rotational flow burner, be provided with adjustable blade, snorkel, petroleum pipeline, biomass powder carrier pipe, both can the simultaneously solid fuel such as coal combustion, living beings, the gaseous fuel such as natural gas, industrial combustion gas, or the liquid fuel such as oil, also can separately with gas, solid or liquid for fuel.
The screen cloth of described classifying screen is divided into two-layer, upper strata is 25mm screen cloth, lower floor is 3mm screen cloth, after the classified sieve screening of coal bunker coal out, diameter is that the coal cinder within the scope of 3-25mm is delivered on fire grate and burnt, be less than the feeding coal pulverizer abrasive dust of 3mm, the coal dust prepared sprays into burner through powder feeding pipe.
The combustion method of above-mentioned boiler, step is:
(1) through coal bunker coal out after sieved through sieve, diameter is that the coal cinder within the scope of 3-25mm is delivered on fire grate and burnt, and be less than the feeding coal pulverizer abrasive dust of 3mm, the coal dust prepared sprays into burner through powder feeding pipe; Biomass solid fuel after crushed, sprays into burner by biomass powder carrier pipe; Gaseous fuel sends into burner through snorkel; Liquid fuel send as burner through oil pipeline;
(2) burner adopts air staged combustion technology, carries out test dispensing to one, two, three wind pressure, air quantity, ensures that burner hearth fuel combustion temperature is not higher than 1000 DEG C, ensures reducing atmosphere, protects low nitrogen burning process.
Compared with prior art, the present invention possesses skills advantage:
(1) flameholding: in combustion process, the thermal-flame that coal dust firing is formed improves the temperature of upper strata burner hearth, abundant thermal source is provided for the coal seam on lower floor's fire grate catches fire, substantially improve coal seam ignition condition, the chain furnace of changing over rely on merely chimney arch heat radiation to ignite, the situation of difficulty of catching fire; Simultaneous Stabilization burning fire bed is again the reliable thermal source that breeze airflow catches fire, and can ensure that coal dust catches fire and smooth combustion in time;
(2) clean environment firendly: on the one hand, realizes multiple gas, the solid, liquid fuel such as coal, living beings, natural gas, industrial combustion gas, oil and burns simultaneously, can reduce the pollutant that fuel itself produces in combustion; Realize low nitrogen burning process on the other hand, effectively control the generation of nitrogen oxide, finally can realize discharge fume dust-laden≤30mg/m3, SO2≤100 mg/m3, nitrogen oxide≤200 mg/m3;
(3) efficient energy-saving: adopt fire grate grate firing to add the compound burning technology of floater combustion, traveling-grate stoker and burner hearth public affairs are on a stove, mutually auxiliary, utilize each other, greatly can improve ignition condition, ensure surely to fire, improve efficiency of combustion and the thermal efficiency, finally can realize solid burnout rate more than 98%, the thermal efficiency more than 90%;
(4) fuel tolerance is wide: this multi fuel compound combustion Industrial Boiler can simultaneously multiple gas, the solid, liquid fuel such as coal combustion, living beings, oil, natural gas, industrial combustion gas, and fuel tolerance is good.
(5) flexible adjustment: arrange adjustable blade in burner, makes the secondary wind energy entered in burner produce different swirl strengths, is easy to control combustion intensity and load.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of burner.
Detailed description of the invention
A kind of multi fuel compound combustion Industrial Boiler as shown in Figure 1, comprises stokehold pulverized coal preparation system, fire grate 4, burner hearth 6, water-cooling wall 5, burner 9; Wherein said stokehold pulverized coal preparation system comprises and is arranged on classifying screen 2 below coal bunker 1 and coal pulverizer 3, and one end of screen cloth 2 is provided with the pipeline of inclination, and the end of pipeline is fixed on the top of fire grate 4, and the below of screen cloth 2 is by the inlet communication of pipeline and coal pulverizer 3; Described burner hearth 6 internal fixtion has at least one burner 9, and the coal dust carrier pipe on burner 9 is communicated with coal pulverizer 3; Described burner hearth 6 forms uptake flue, and water-cooling wall 5 is full fin panel casing, is furnished with convection bank in horizontal flue, and burner hearth 6 rear portion is down pass, is furnished with flue gas afterbody waste-heat recovery device in flue.
Wherein flue gas afterbody waste-heat recovery device comprises air preheater 7 and economizer 8; Screen cloth 2 is two-layer, and upper strata is 25mm screen cloth, 3mm screen cloth.
Burner 9 is multifunctional rotational flow burner, as shown in Figure 2, be provided with adjustable blade 95, snorkel 91, petroleum pipeline 92, coal dust carrier pipe 93, biomass powder carrier pipe 94, both can the simultaneously solid fuel such as coal combustion, living beings, the gaseous fuel such as natural gas, industrial combustion gas, or the liquid fuel such as oil, also can separately with gas, solid or liquid for fuel.
The combustion method of above-mentioned boiler, step is:
(1) after the screening of coal bunker coal out classified sieve, diameter is that the coal cinder within the scope of 3-25mm is delivered on fire grate and burnt, and be less than the feeding coal pulverizer abrasive dust of 3mm, the coal dust prepared sprays into burner through powder feeding pipe; Biomass solid fuel after crushed, sprays into burner by biomass powder carrier pipe; Gaseous fuel sends into burner through snorkel; Liquid fuel send as burner through oil pipeline;
(2) burner adopts air staged combustion technology, carries out test dispensing to one, two, three wind pressure, air quantity, ensures that burner hearth fuel combustion temperature is not higher than 1000 DEG C, ensures reducing atmosphere, protects low nitrogen burning process.
Claims (5)
1. a multi fuel compound combustion Industrial Boiler, is characterized in that, comprises stokehold pulverized coal preparation system, fire grate (4), burner hearth (6), water-cooling wall (5), burner (9); Wherein said stokehold pulverized coal preparation system comprises the classifying screen (2) and coal pulverizer (3) that are arranged on coal bunker (1) below, one end of screen cloth (2) is provided with the pipeline of inclination, the end of pipeline is fixed on the top of fire grate (4), and the below of screen cloth (2) is by the inlet communication of pipeline and coal pulverizer (3); Described burner hearth (6) internal fixtion has at least one burner (9), and the coal dust carrier pipe on burner (9) is communicated with coal pulverizer (3); Described burner hearth (6) forms uptake flue, and water-cooling wall (5) is full fin panel casing, is furnished with convection bank in horizontal flue, and burner hearth (6) rear portion is down pass, is furnished with flue gas afterbody waste-heat recovery device in flue.
2. a kind of multi fuel compound combustion Industrial Boiler according to claim 1, is characterized in that, described flue gas afterbody waste-heat recovery device comprises air preheater (7) and economizer (8).
3. a kind of multi fuel compound combustion Industrial Boiler according to claim 1 and 2, is characterized in that, described screen cloth (2) is for two-layer, and upper strata is 25mm screen cloth, 3mm screen cloth.
4. a kind of multi fuel compound combustion Industrial Boiler according to claim 1 and 2, it is characterized in that, described burner (9) is multifunctional rotational flow burner, is provided with adjustable blade (95), snorkel (91), petroleum pipeline (92), coal dust carrier pipe (93), biomass powder carrier pipe (94).
5. the combustion method of boiler according to claim 1, is characterized in that, step is:
(1) after the screening of coal bunker coal out classified sieve, diameter is that the coal cinder within the scope of 3-25mm is delivered on fire grate and burnt, and be less than the feeding coal pulverizer abrasive dust of 3mm, the coal dust prepared sprays into burner through powder feeding pipe; Biomass solid fuel after crushed, sprays into burner by biomass powder carrier pipe; Gaseous fuel sends into burner through snorkel; Liquid fuel send as burner through oil pipeline;
(2) burner adopts air staged combustion technology, carries out test dispensing to one, two, three wind pressure, air quantity, ensures that burner hearth fuel combustion temperature is not higher than 1000 DEG C, ensures reducing atmosphere, protects low nitrogen burning process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410811199.6A CN104515126A (en) | 2014-12-24 | 2014-12-24 | Multi-fuel combined combustion industrial boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410811199.6A CN104515126A (en) | 2014-12-24 | 2014-12-24 | Multi-fuel combined combustion industrial boiler |
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| CN104515126A true CN104515126A (en) | 2015-04-15 |
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| CN201410811199.6A Pending CN104515126A (en) | 2014-12-24 | 2014-12-24 | Multi-fuel combined combustion industrial boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109424961A (en) * | 2017-09-05 | 2019-03-05 | 赫普科技发展（北京）有限公司 | A kind of burner |
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| CN2215661Y (en) * | 1994-10-10 | 1995-12-20 | 刘雪华 | Coal blasting boiler |
| US6027330A (en) * | 1996-12-06 | 2000-02-22 | Coen Company, Inc. | Low NOx fuel gas burner |
| JP2001041439A (en) * | 1999-07-28 | 2001-02-13 | Mitsubishi Heavy Ind Ltd | Boiler |
| CN201273568Y (en) * | 2008-07-04 | 2009-07-15 | 徐州燃控科技股份有限公司 | Graded wind-adjusting low-nitrogen/oxygen multi-fuel combustion combustor |
| CN101871648A (en) * | 2010-07-09 | 2010-10-27 | 郭雅婷 | Multicomponent fuel industrial boiler and kiln burner |
| CN101929669A (en) * | 2010-08-31 | 2010-12-29 | 西安交通大学 | Vertical industrial pulverized coal boiler system |
| CN101936525A (en) * | 2010-09-27 | 2011-01-05 | 上海交通大学 | Low NOx rotational flow coal dust combustion device of industrial boiler |
| CN102620295A (en) * | 2012-04-13 | 2012-08-01 | 西安康桥能源技术有限责任公司 | Industrial radial concentration dual-air regulation rotational flow coal powder and fuel gas mixed combustor |
| CN202561788U (en) * | 2012-04-27 | 2012-11-28 | 陈永 | Combined combustion coal supply device in front of chain boiler furnace |
-
2014
- 2014-12-24 CN CN201410811199.6A patent/CN104515126A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2215661Y (en) * | 1994-10-10 | 1995-12-20 | 刘雪华 | Coal blasting boiler |
| US6027330A (en) * | 1996-12-06 | 2000-02-22 | Coen Company, Inc. | Low NOx fuel gas burner |
| JP2001041439A (en) * | 1999-07-28 | 2001-02-13 | Mitsubishi Heavy Ind Ltd | Boiler |
| CN201273568Y (en) * | 2008-07-04 | 2009-07-15 | 徐州燃控科技股份有限公司 | Graded wind-adjusting low-nitrogen/oxygen multi-fuel combustion combustor |
| CN101871648A (en) * | 2010-07-09 | 2010-10-27 | 郭雅婷 | Multicomponent fuel industrial boiler and kiln burner |
| CN101929669A (en) * | 2010-08-31 | 2010-12-29 | 西安交通大学 | Vertical industrial pulverized coal boiler system |
| CN101936525A (en) * | 2010-09-27 | 2011-01-05 | 上海交通大学 | Low NOx rotational flow coal dust combustion device of industrial boiler |
| CN102620295A (en) * | 2012-04-13 | 2012-08-01 | 西安康桥能源技术有限责任公司 | Industrial radial concentration dual-air regulation rotational flow coal powder and fuel gas mixed combustor |
| CN202561788U (en) * | 2012-04-27 | 2012-11-28 | 陈永 | Combined combustion coal supply device in front of chain boiler furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109424961A (en) * | 2017-09-05 | 2019-03-05 | 赫普科技发展（北京）有限公司 | A kind of burner |
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Application publication date: 20150415 |
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