CN102261668A - Secondary air distribution system of biomass steam boiler - Google Patents
Secondary air distribution system of biomass steam boiler Download PDFInfo
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- CN102261668A CN102261668A CN2011101233359A CN201110123335A CN102261668A CN 102261668 A CN102261668 A CN 102261668A CN 2011101233359 A CN2011101233359 A CN 2011101233359A CN 201110123335 A CN201110123335 A CN 201110123335A CN 102261668 A CN102261668 A CN 102261668A
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- airduct
- air pipe
- front wall
- rear arch
- air
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Abstract
The invention discloses a secondary air distribution system of a biomass steam boiler. The system is composed of a left air pipe, a right air pipe, a front wall air pipe and a rear arch air pipe. The left air pipe and the right air pipe are arranged above a fire grate and arranged at the left and right sides of the fire grate respectively and longitudinally. The front wall air pipe is arranged above the fire grate and transversely arranged under the front wall of a hearth. The rear arch air pipe is transversely arranged in a smoke zone and arranged above the rear arch of the hearth. All surfaces facing to fire of the left air pipe, the right air pipe, the front wall air pipe and the rear arch air pipe in the combustion centre of the hearth are provided with a plurality of air spraying nozzles facing to the combustion centre of the hearth. The left air pipe and the right air pipe are used for oppositely spraying air towards the left and right sides of the combustion centre. The front wall air pipe and the rear arch air pipe are used for oppositely spraying air towards the front and rear parts of the combustion centre. Therefore, biomass particles and air are sufficiently burnt; the excess air coefficient is reduced; and the black smoke is reduced.
Description
Technical field
The invention belongs to the steam boiler field, specifically relate to a kind of blowing system of steam boiler of firing biomass fuel.
Background technology
At present, have for the air distribution mode of coal-burning boiler: waisted type air distribution, pagoda shape air distribution, the shape of falling pagoda air distribution, these several air distribution modes respectively have pluses and minuses, and technology is relatively ripe.But, for biomass fuel boiler, because biomass fuel easily catches fire, fugitive constituent height, the time that burns are short, and only needs a large amount of oxygen at high temperature combustion zone, if the uniform requirement that can not satisfy biomass fuel completing combustion of secondary wind, then can be in operation and the high and over-emitting black exhaust of excess air coefficient often occur, the phenomenon of incomplete combustion, slagging scorification easily, the mucking machine motor is fragile, cause boiler thermal output low, maintenance of equipment rate height.
Summary of the invention
In order to solve the problem that prior art exists, the invention provides a kind of centralized blowing system, by reasonable distribution secondary wind, make that biomass fuel and air are full and uniform to be mixed, the purpose of reinforcement completing combustion degree.
In order to realize above purpose, technical scheme of the present invention is as follows:
A kind of biomass steam boiler secondary blowing system, by the left side airduct, the right side airduct, front wall airduct and rear arch airduct are formed, described left side airduct and right side airduct are arranged at the top of fire grate and vertically are arranged in the left and right sides of fire grate respectively, described front wall airduct is arranged at the top of fire grate and lateral arrangement below the burner hearth front wall, described rear arch airduct is horizontally set in the cigarette district and is arranged in burner hearth rear arch top, describedly is being positioned at the left side airduct of burner hearth combustion centre, the right side airduct, the side towards the fire of front wall airduct and rear arch airduct is provided with several air blast beaks towards burner hearth combustion centre.
Further, the axis extended line of the air blast beak of described left side airduct and right side airduct is with tangent with the circumferential area of burner hearth combustion centre.
The plane parallel of described left side airduct and right side airduct and fire grate.
The air blast beak of described front wall airduct is from the horizontal by 10～30 ° of downward angles, and the air blast beak of described rear arch airduct is from the horizontal by 5～15 ° of downward angles.
Compared with prior art, owing to be provided with left side airduct, right side airduct, front wall airduct and rear arch airduct in the central area of burner hearth, left side airduct and right side airduct relative spray wind to about combustion centre, front wall airduct and rear arch airduct relative spray wind before and after combustion centre, the biological particles burning is fully burnt with air, reduce excess air coefficient, reduced black smoke.Flame has formed the serpentine torch in the burner hearth because the rear arch airduct than front wall airduct height, makes, and increases the length of flame, has prolonged the time of staying of fuel in burner hearth, and biomass granule fuel is burnt.Because the air blast beak of left and right side airduct is tangentially to blow in the circumferential area of combustion centre, gas in the burner hearth is stirred, produce flue-gas swirl, make with air and fully mix, burn volatile matter, reduce furnace temperature, prolong the flying dust and the stroke of fly ash combustible material in burner hearth that suspend, flying dust and fly ash combustible material are further reduced, reduced flue gas concentration, help improving the efficient and the environmental-protecting performance of boiler.The air quantity of blowing system can distribute 30% of total blast volume, helps reducing furnace temperature, alleviates the ash slag sintering phenomenon, forms fluffy powder in small, broken bits, helps boiler and slags tap, and significantly reduces the maintenance rate of the equipment of slagging tap.
Description of drawings
Fig. 1 is blowing system position view in steam boiler;
Fig. 2 is the vertical view of Fig. 1.
Below, with accompanying drawing the present invention further is described in detail in conjunction with specific embodiments.
The specific embodiment
Biomass steam boiler secondary blowing system is made up of left side airduct 1, right side airduct 2, front wall airduct 3 and rear arch airduct 4.Left side airduct 1 and right side airduct 2 are arranged at the top of fire grate, and their vertical respectively (fore-and-aft direction of burner hearth is vertically, and are promptly identical with the fire grate direction of advance) are arranged in the left and right sides of fire grate.The tube hub line of left side airduct 1 and right side airduct 2 is parallel with the fore-and-aft plane of fire grate, and promptly the fire grate plane tilts, and left side airduct 1 and right side airduct 2 also are white burner hearth rear portion to the furnace front layouts that is inclined upwardly, about 3～10 ° of angle of inclination.Top and horizontal (vertical with the fire grate direction of advance) that front wall airduct 3 is arranged at fire grate are arranged in burner hearth front wall top, and rear arch airduct 4 is arranged in the cigarette district and horizontal (vertical with the fire grate direction of advance) is arranged in burner hearth rear arch top.Left side airduct 1, right side airduct 2, front wall airduct 3 and rear arch airduct 4 be provided with some air blast beaks 6, air blast beak 6 is all towards burner hearth combustion centre.The air blast beak 6 of left side airduct 1 and right hand hay cutter airduct 2 forms whirlwind tangentially towards the combustion centre zone.The air blast beak 6 of front wall airduct 3 is from the horizontal by 20 ° of downward angle a, and the air blast beak 6 of rear arch airduct 4 is from the horizontal by 10 ° of downward angle b.
During air distribution work, distribute for the secondary blowing system to account for 30% cold air of total blast volume, secondary wind enters the secondary blowing system through control valve 5, the secondary wind that accounts for total blast volume 20% enters in the left and right side secondary air channel, tangentially spray into combustion centre, the secondary wind that accounts for total blast volume 5% enters the front wall airduct, becomes 20 ° of angles of inclination to spray into combustion centre downwards, the two money wind that account for total blast volume 5% enter the rear arch airduct, become 10 ° of angles of inclination to spray into combustion centre downwards.
Claims (4)
1. biomass steam boiler secondary blowing system, it is characterized in that: by the left side airduct, the right side airduct, front wall airduct and rear arch airduct are formed, described left side airduct and right side airduct are arranged at the top of fire grate and vertically are arranged in the left and right sides of fire grate respectively, described front wall airduct is arranged at the top of fire grate and lateral arrangement below the burner hearth front wall, described rear arch airduct is horizontally set in the cigarette district and is arranged in burner hearth rear arch top, describedly is being positioned at the left side airduct of burner hearth combustion centre, the right side airduct, the side towards the fire of front wall airduct and rear arch airduct is provided with several air blast beaks towards burner hearth combustion centre.
2. secondary blowing system according to claim 1 is characterized in that, the axis extended line of the air blast beak of described left side airduct and right side airduct is with tangent with the circumferential area of burner hearth combustion centre.
3. secondary blowing system according to claim 2 is characterized in that, described left side airduct is parallel with the fire grate fore-and-aft plane with the right side airduct.
4. secondary blowing system according to claim 1 is characterized in that, the air blast beak of described front wall airduct is from the horizontal by 10～30 ° of downward angles, and the air blast beak of described rear arch airduct is from the horizontal by 5～15 ° of downward angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101233359A CN102261668A (en) | 2011-05-13 | 2011-05-13 | Secondary air distribution system of biomass steam boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101233359A CN102261668A (en) | 2011-05-13 | 2011-05-13 | Secondary air distribution system of biomass steam boiler |
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| Publication Number | Publication Date |
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| CN102261668A true CN102261668A (en) | 2011-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101233359A Pending CN102261668A (en) | 2011-05-13 | 2011-05-13 | Secondary air distribution system of biomass steam boiler |
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| CN (1) | CN102261668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907734A (en) * | 2017-05-04 | 2017-06-30 | 苏州迪森能源技术有限公司 | Blowing system and fuel combination boiler |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363618A (en) * | 2008-09-28 | 2009-02-11 | 哈尔滨工业大学 | Chain boiler plant for burning multi-biomass fuels |
| CN201237236Y (en) * | 2008-06-17 | 2009-05-13 | 上海智群能源科技有限公司 | Composite secondary air apparatus for chain boiler combustion |
| CN101793388A (en) * | 2010-03-03 | 2010-08-04 | 朴显泽 | Biomass preventing corrosion of superheater and garbage power generation boiler |
| CN101922729A (en) * | 2010-09-03 | 2010-12-22 | 阜新汇丰资源开发有限公司 | Layer combustion boiler for combusting bundled straw |
| CN101949534A (en) * | 2010-09-30 | 2011-01-19 | 清华大学 | Biomass grate firing boiler |
| CN202074553U (en) * | 2011-05-13 | 2011-12-14 | 广州迪森热能技术股份有限公司 | Secondary air distribution system of biomass steam boiler |
-
2011
- 2011-05-13 CN CN2011101233359A patent/CN102261668A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201237236Y (en) * | 2008-06-17 | 2009-05-13 | 上海智群能源科技有限公司 | Composite secondary air apparatus for chain boiler combustion |
| CN101363618A (en) * | 2008-09-28 | 2009-02-11 | 哈尔滨工业大学 | Chain boiler plant for burning multi-biomass fuels |
| CN101793388A (en) * | 2010-03-03 | 2010-08-04 | 朴显泽 | Biomass preventing corrosion of superheater and garbage power generation boiler |
| CN101922729A (en) * | 2010-09-03 | 2010-12-22 | 阜新汇丰资源开发有限公司 | Layer combustion boiler for combusting bundled straw |
| CN101949534A (en) * | 2010-09-30 | 2011-01-19 | 清华大学 | Biomass grate firing boiler |
| CN202074553U (en) * | 2011-05-13 | 2011-12-14 | 广州迪森热能技术股份有限公司 | Secondary air distribution system of biomass steam boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907734A (en) * | 2017-05-04 | 2017-06-30 | 苏州迪森能源技术有限公司 | Blowing system and fuel combination boiler |
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Application publication date: 20111130 |