CN202203981U - Biomass direct-fired boiler secondary and tertiary air device - Google Patents
Biomass direct-fired boiler secondary and tertiary air device Download PDFInfo
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- CN202203981U CN202203981U CN2011202188638U CN201120218863U CN202203981U CN 202203981 U CN202203981 U CN 202203981U CN 2011202188638 U CN2011202188638 U CN 2011202188638U CN 201120218863 U CN201120218863 U CN 201120218863U CN 202203981 U CN202203981 U CN 202203981U
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- tertiary air
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Abstract
The utility model relates to a biomass direct-fired boiler secondary and tertiary air device, comprising a front arch, a back arch, a secondary air device on the front arch, a wall for cutting smoke off arranged on the back arch and a tertiary air device arranged on the wall. The air is hierarchically distributed according to the component and combustion characteristic of the biomass fuel, the high efficient combustion of the fuel is realized and the combustion efficiency is greatly increased.
Description
Technical field
The utility model relates to a kind of biomass boiler, especially a kind of biomass direct-combustion boiler secondary and tertiary air device.
Background technology
Greatly develop in country under the condition of biomass energy, biomass boiler is become the staple product that substitutes fire coal and oil-burning gas-fired boiler because the support of policy and superior environmental protection, economic performance favor gradually.But biomass boiler in the market also is not suitable for that the biomass fuel volatile content is high, ignition point is low, fuel gas is difficult for combustion characteristics such as after-flame; Biomass fuel proportion is little; Volume is big, tightly relies on the burning of fire grate upper strata, can not realize abundant burning; Thereby cause problems such as efficiency of combustion is low, exhaust gas temperature is high, and the thermal efficiency is low.
Conventional boiler adopts a wind to design; Nearly 2 years; For improving the burning degree of biomass fuel, part biological matter boiler is provided with the device that secondary is given wind, limited by chamber structure; Improve but unsatisfactory though efficiency of combustion has, definite biomass fuel fully the burning with the blowing angle of tuyere position plays a key effect.
The utility model content
The purpose of the utility model is for overcoming the deficiency of above-mentioned prior art, provide a kind of simple in structure, rationally distributed, the biomass direct-combustion boiler secondary that can enhance productivity and tertiary air device.
For realizing above-mentioned purpose, the utility model adopts following technical proposals:
A kind of biomass direct-combustion boiler secondary and tertiary air device comprise face arch and rear arch, and rear arch is provided with brick baffle, and face arch is provided with overfire air device, and brick baffle is provided with the tertiary air device.
Said overfire air device comprises the air main that is arranged in the face arch, and the air main front end is provided with the nozzle that is arranged in boiler furnace, and plurality of nozzles laterally is uniformly distributed with along burner hearth; Nozzle is downward-sloping horizontal by 15～25 ° of angles, and wind speed is 30～35m/s, under this angle and the wind speed; Can guarantee that mist rises to forms strong whirlpool when firing the reducing zone again; Increase its stop and reaction time, avoid secondary wind directly to blow to rear arch and separated arch simultaneously, wash away refractory material.
Said tertiary air device comprises the air main that is arranged in the brick baffle; Air main is provided with by-pass valve control, and the air main front end is provided with some nozzles that are arranged in brick baffle bottom and top, for making cloth wind even; Plurality of nozzles laterally is uniformly distributed with along burner hearth; Horizontal by 10～15 ° of angles, wind speed is 20～25m/s under the nozzle of brick baffle top layout is tilted to, and this design angle and wind speed can carry out disturbance to the mist in the gasification, and combustion district; Make it and be " α " curvilinear motion, increase its stop and reaction time; Bottom nozzle is inclined upwardly horizontal by 15～25 ° of angles; Wind speed is 8～12m/s, and it is in the gasification, and combustion district in the burner hearth enough air being provided, making its ability completing combustion that the bottom tertiary air mainly acts on; Simultaneously, lower wind speed can not produce considerable influence to the motion of mist.The top and bottom nozzle laterally is uniformly distributed with along burner hearth, through valve control top and bottom airduct air quantity, makes nozzle wind velocity reach designing requirement.
The traveling-grate stoker bottom blasts wind one time in the utility model, accounts for 50% of total blast volume, and overfire air device arranges that the air quantity that blasts accounts for 15～20% of total blast volume, and the air quantity that the tertiary air device blasts accounts for 30～35% of total blast volume.
The utility model is simple in structure, and is rationally distributed, can enhance productivity.
Description of drawings
Fig. 1 is the utility model structural representation;
1. face arch wherein, 2. overfire air device, 3. rear arch, 4. tertiary air device, 5. brick baffle, 6. traveling-grate stoker, 7. nozzle is 8. at a distance from arch.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
As shown in Figure 1, a kind of biomass direct-combustion boiler secondary and tertiary air device comprise face arch 1 and rear arch 3, and rear arch 3 is provided with brick baffle 5, and face arch 1 is provided with overfire air device 2, and brick baffle 5 is provided with tertiary air device 4.
Said overfire air device 2 comprises the air main that is arranged in the face arch, and the air main front end is provided with the nozzle 7 that is arranged in boiler furnace, and plurality of nozzles 7 laterally is uniformly distributed with along burner hearth; Nozzle 7 is downward-sloping horizontal by 15～25 ° of angles, and wind speed is 30～35m/s, under this angle and the wind speed; Can guarantee that mist forms strong whirlpool when rising; Increase its stop and reaction time, avoid secondary wind directly to blow to rear arch 3 and separated arch 8 simultaneously, wash away refractory material.
Said tertiary air device 4 comprises is arranged in the air main in the brick baffle 5; Air main is provided with by-pass valve control, and the air main front end is provided with some nozzles 7 that are arranged in brick baffle 5 bottoms and top, for making cloth wind even; Plurality of nozzles 7 laterally is uniformly distributed with along burner hearth; Horizontal by 10～15 ° of angles, wind speed is 20～25m/s under the nozzle 7 of brick baffle 5 top layout is tilted to, and this design angle and wind speed can carry out disturbance to the mist in the gasification, and combustion district; Make it and be " α " curvilinear motion, increase its stop and reaction time; Bottom nozzle is inclined upwardly horizontal by 15～25 ° of angles; Wind speed is 8～12m/s, and it is in the gasification, and combustion district in the burner hearth enough air being provided, making its ability completing combustion that the bottom tertiary air mainly acts on; Simultaneously, lower wind speed can not produce considerable influence to the motion of mist.Top and bottom nozzle 7 laterally is uniformly distributed with along burner hearth, through valve control top and bottom airduct air quantity, makes nozzle wind velocity reach designing requirement.
The utility model traveling-grate stoker 6 bottoms blast a wind and account for 50% of total blast volume, and the air quantity that overfire air device 2 blasts accounts for 15～20% of total blast volume, and the air quantity that tertiary air device 4 blasts accounts for 30～35% of total blast volume.
Claims (3)
1. biomass direct-combustion boiler secondary and tertiary air device comprise face arch and rear arch, and face arch is provided with overfire air device, and rear arch is provided with brick baffle, and brick baffle is provided with the tertiary air device.
2. biomass direct-combustion boiler secondary according to claim 1 and tertiary air device; It is characterized in that; Said overfire air device comprises the air main that is arranged in the face arch; The air main front end is provided with the nozzle that is arranged in boiler furnace, and plurality of nozzles laterally is uniformly distributed with along burner hearth, and nozzle is downward-sloping horizontal by 15～25 ° of angles.
3. biomass direct-combustion boiler secondary according to claim 1 and tertiary air device; It is characterized in that; Said tertiary air device comprises is arranged in the air main in the brick baffle, and air main is provided with by-pass valve control, and the air main front end is provided with some nozzles that are arranged in brick baffle bottom and top; Plurality of nozzles laterally is uniformly distributed with along burner hearth, is tilted to down horizontal by 10～15 ° of angles at the nozzle of brick baffle top layout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202188638U CN202203981U (en) | 2011-06-25 | 2011-06-25 | Biomass direct-fired boiler secondary and tertiary air device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202188638U CN202203981U (en) | 2011-06-25 | 2011-06-25 | Biomass direct-fired boiler secondary and tertiary air device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202203981U true CN202203981U (en) | 2012-04-25 |
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ID=45968102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202188638U Expired - Fee Related CN202203981U (en) | 2011-06-25 | 2011-06-25 | Biomass direct-fired boiler secondary and tertiary air device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202203981U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322582A (en) * | 2013-06-08 | 2013-09-25 | 北京奥科瑞丰新能源股份有限公司生物质能研究院 | Biomass drying oven |
-
2011
- 2011-06-25 CN CN2011202188638U patent/CN202203981U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322582A (en) * | 2013-06-08 | 2013-09-25 | 北京奥科瑞丰新能源股份有限公司生物质能研究院 | Biomass drying oven |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20140625 |
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| EXPY | Termination of patent right or utility model |