CN202791991U - Hearth combustion structure capable of lowing NOx discharge - Google Patents
Hearth combustion structure capable of lowing NOx discharge Download PDFInfo
- Publication number
- CN202791991U CN202791991U CN 201220350783 CN201220350783U CN202791991U CN 202791991 U CN202791991 U CN 202791991U CN 201220350783 CN201220350783 CN 201220350783 CN 201220350783 U CN201220350783 U CN 201220350783U CN 202791991 U CN202791991 U CN 202791991U
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- Prior art keywords
- hearth
- combustion
- nox
- spout
- combustion structure
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Abstract
The utility model provides a hearth combustion structure capable of lowing NOx discharge. The hearth combustion structure can enable NOx generated in a main combustion area to be reduced in a re-combustion area so as to lower the NOx discharge of a furnace, so that the NOx is lowered, and the NOx discharge meets the national requirement. The hearth combustion structure comprises a hearth, wherein the inner wall of the hearth is provided with a main pulverized coal combustor. The hearth combustion structure is characterized in that a gas fuel re-combustion nozzle is arranged above the main pulverized coal combustor, a combustion wind nozzle is arranged above the gas fuel re-combustion nozzle, and fuel penetrating through the gas fuel re-combustion nozzle is tail gas generated by a chemical engineering device.
Description
Technical field
The utility model relates to the technical field of structures of boiler, is specially a kind of hearth combustion structure of the NOx of reduction discharging.
Background technology
Existing pulverized-coal fired boiler generally all can allow to mix a certain proportion of gas of burning, and the arrangement of this gas spout has two kinds, a kind of is that it directly is arranged in the overfiren air port of coal burner, another kind is to arrange separately that in the main burner district gas specific spout, these arrangements all are to burn as purpose of design so that gas is mixed.Along with the day by day raising of Environmental Protection in China requirement and the development of economic technology, particularly country in 2011 has promulgated after " fossil-fuel power plant atmospheric pollutant emission standard ", to the pollutant of new and old power plant particularly the NOx discharging very harsh requirement has been proposed, wherein to reduce NOx be top priority to coal-fired power station boiler.
Summary of the invention
For the problems referred to above, the utility model provides a kind of hearth combustion structure of the NOx of reduction discharging, it is so that the NOx that generates in main combustion zone produces the discharging that reduction reaction reduces boiler NOX during through the reburning zone, thereby reduces NOx, guarantees that discharging meets national requirements.
A kind of hearth combustion structure that reduces the NOx discharging, its technical scheme is such: it comprises burner hearth, the inwall of described burner hearth is provided with the coal dust main burner, it is characterized in that: the top of described coal dust main burner is provided with gaseous fuel and fires spout again, the top that described gaseous fuel fires spout again is provided with the burnt wind spout, and it is the tail gas that chemical plant installations produces that described gaseous fuel fires the fuel that spout passes into again.
It is further characterized in that: the volume content that the tail gas that described chemical plant installations produces is specially methane is greater than 30% mist.
After adopting said structure of the present utility model, at the boiler coal-ash main burner, the top that is the primary zone arranges that gaseous fuel fires spout again and forms the reducing zone, above firing spout again, arranges gaseous fuel that the burnt wind spout forms burnt zone, and it is the tail gas that chemical plant installations produces that gaseous fuel fires the fuel that spout passes into again, itself so that the NOx that generates in main combustion zone when firing spout again through gaseous fuel and the tail gas that produces of chemical plant installations produce the discharging that reduction reaction reduces boiler NOX, thereby reduce NOx, guarantee that discharging meets national requirements; On the other hand, the tail gas that chemical plant installations produces is turned waste into wealth, saved production cost.
Description of drawings
Fig. 1 is front view structural representation of the present utility model.
The specific embodiment
See Fig. 1, it comprises burner hearth 1, the inwall of burner hearth 1 is provided with coal dust main burner 2, the top spacing distance H of coal dust main burner 2 is provided with gaseous fuel and fires spout 3 again, the area of space that gaseous fuel fires spout 3 corresponding burner hearths again is the reducing zone, the top spacing distance D that gaseous fuel fires spout 3 again is provided with burnt wind spout 4, the area of space of burnt wind spout 4 corresponding burner hearths is burnt zone, it is the tail gas that chemical plant installations produces that gaseous fuel fires the fuel that spout 4 passes into again, and the volume content that the tail gas that chemical plant installations produces is specially methane is greater than 30% mist.
Claims (2)
1. one kind is reduced the hearth combustion structure that NOx discharges, it comprises burner hearth, the inwall of described burner hearth is provided with the coal dust main burner, it is characterized in that: the top of described coal dust main burner is provided with gaseous fuel and fires spout again, the top that described gaseous fuel fires spout again is provided with the burnt wind spout, and it is the tail gas that chemical plant installations produces that described gaseous fuel fires the fuel that spout passes into again.
2. a kind of hearth combustion structure that reduces NOx discharging according to claim 1 is characterized in that: the volume content that the tail gas that described chemical plant installations produces is specially methane is greater than 30% mist.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220350783 CN202791991U (en) | 2012-07-19 | 2012-07-19 | Hearth combustion structure capable of lowing NOx discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220350783 CN202791991U (en) | 2012-07-19 | 2012-07-19 | Hearth combustion structure capable of lowing NOx discharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202791991U true CN202791991U (en) | 2013-03-13 |
Family
ID=47819247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220350783 Expired - Lifetime CN202791991U (en) | 2012-07-19 | 2012-07-19 | Hearth combustion structure capable of lowing NOx discharge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202791991U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777891A (en) * | 2012-07-19 | 2012-11-14 | 无锡华光锅炉股份有限公司 | Furnace combustion structure for reducing NOx (nitrogen oxide) discharge |
| CN113188118A (en) * | 2021-04-09 | 2021-07-30 | 东方电气集团东方锅炉股份有限公司 | Equipment and method for bulk blending combustion of industrial tail gas in circulating fluidized bed boiler |
-
2012
- 2012-07-19 CN CN 201220350783 patent/CN202791991U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777891A (en) * | 2012-07-19 | 2012-11-14 | 无锡华光锅炉股份有限公司 | Furnace combustion structure for reducing NOx (nitrogen oxide) discharge |
| CN113188118A (en) * | 2021-04-09 | 2021-07-30 | 东方电气集团东方锅炉股份有限公司 | Equipment and method for bulk blending combustion of industrial tail gas in circulating fluidized bed boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 214028 No. 3 Chengnan Road, new Wu District, Jiangsu, Wuxi Patentee after: Wuxi Huaguang Environmental Protection Energy Group Co.,Ltd. Address before: 214028 No. 3 Chengnan Road, New District, Jiangsu, Wuxi Patentee before: WUXI HUAGUANG BOILER Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |