CN203797692U - Composite over-fire air system for corner-tangential boiler - Google Patents
Composite over-fire air system for corner-tangential boiler Download PDFInfo
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- CN203797692U CN203797692U CN201320824147.3U CN201320824147U CN203797692U CN 203797692 U CN203797692 U CN 203797692U CN 201320824147 U CN201320824147 U CN 201320824147U CN 203797692 U CN203797692 U CN 203797692U
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- 239000002131 composite material Substances 0.000 title abstract 5
- 238000000034 method Methods 0.000 claims description 18
- 238000010304 firing Methods 0.000 claims description 17
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 11
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 239000000779 smoke Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a composite over-fire air system for a corner-tangential boiler. The composite over-fire air system for the corner-tangential boiler comprises corner-arranging over-fire air devices arranged on the four corners of a hearth, and a tangent circle is formed by the four corner-arranging over-fire air devices at the position of the center line of the hearth. The composite over-fire air system for the corner-tangential boiler further comprises wall type over-fire air devices which are arranged on the four walls of the hearth, a horizontally-swinging structure or a multi-point arranging structure is adopted, and the wall type over-fire air devices are arranged above the corner-arranging over-fire air devices on the top. The composite over-fire air system for the corner-tangential boiler is simple and reasonable in structure, generation of unburned products is controlled while it is guaranteed that nitric oxide of the boiler is reduced, high combustion efficiency is guaranteed while low-pollution emission is achieved, and the economical efficiency of operation of the boiler is improved; meanwhile, the amount of residual rotation of the corner-tangential boiler can be reduced, and deviation of the smoke temperature at the position of an outlet of the hearth is reduced.
Description
Technical field
The utility model relates to a kind of Process In A Tangential Firing combined type after-flame wind system, belongs to after-flame wind system technical field.
Background technology
Grading combustion technology is the technological means of the reduction nitrogen oxide that current coal-fired unit is conventional, in Opposite Firing Boiler, W type flame boiler and Process In A Tangential Firing, is all widely used.Wherein decisive role has been played in the design of after-flame wind therein.But, along with adding of after-flame wind, main burner region excess air coefficient is less than 1, namely there is anoxic zone, now will produce a large amount of uncombusted products as CO and fly ash combustible material etc., if later stage after-flame wind add not in time or to add implantation site improper, will make these uncombusted products directly discharge boiler, reduce boiler efficiency.Especially adopt the coal-burning boiler of Terms of Corner Tangential Combustion, due to the mixing ability of burner own a little less than, need to rely on whole aerodynamic field in stove well to mix, it is particularly important that the setting of after-flame wind just seems.
Utility model content
The purpose of this utility model is: a kind of Process In A Tangential Firing combined type after-flame wind system is provided, in the situation that adopting vast scale after-flame wind, overcome the problem that uncombusted product that primary zone anoxic causes significantly increases, thereby can effectively solve above-mentioned problems of the prior art.
The purpose of this utility model is to realize by following technical proposals: a kind of Process In A Tangential Firing combined type after-flame wind system, comprise that the angle being arranged on four angles of burner hearth puts formula after-flame wind, four angles are put formula after-flame wind and are formed the circle of contact in burner hearth centerline, also comprise wall formula after-flame wind, described wall formula after-flame wind is arranged on the four sides wall of burner hearth, adopt horizontal hunting structure or multiple spot arrangement, the absolute altitude of wall formula after-flame wind is arranged in the top that formula after-flame wind is put at top layer angle.
As a kind of optimal way, described after-flame elegance horizontal hunting structure, the wind that wall formula after-flame wind goes out becomes the circle of contact of wall formula after-flame wind at freeze profile, and is high speed after-flame wind structure.
Further, on the left and right side wall and forward and backward wall of burner hearth, approach centerline respectively arrange one can only horizontal hunting wall formula after-flame wind, four wall formula after-flame wind form the circle of contact in the centerline of burner hearth.
As another optimal way, described wall formula after-flame elegance multiple spot arrangement adds several fixed wall formula after-flame wind on the wall of four sides wall, and is middle low speed after-flame wind structure.
Further, described wall formula after-flame wind is respectively arranged two on left and right side wall and forward and backward wall.
Compared with prior art, the beneficial effects of the utility model: the utility model Process In A Tangential Firing combined type after-flame wind system is simple in structure, rationally, can guarantee to control when boiler reduces nitrogen oxide the generation of uncombusted product, when accomplishing low pollution emission, guarantee higher efficiency of combustion, improve the economy of boiler operatiopn; Can also reduce the residual rotation of Process In A Tangential Firing, reduce furnace outlet gas temperature deviation simultaneously.
Accompanying drawing explanation
Fig. 1 is the shuttle-type structural representation of the utility model Process In A Tangential Firing combined type after-flame wind system;
Fig. 2 is the fixed structural representation of the utility model Process In A Tangential Firing combined type after-flame wind system.
The specific embodiment
Below in conjunction with specific embodiment, the utility model is further described.
Disclosed all features in this description, or the step in disclosed all methods or process, except the speciality and/or step of mutual repulsion, all can combine by any way, unless narration especially, all can be replaced by other equivalences or the alternative features with similar object,, unless narration especially, an embodiment in a series of equivalences of each feature or similar characteristics.
As shown in Figure 1-2, the utility model Process In A Tangential Firing combined type after-flame wind system comprises that the angle being arranged on four angles of burner hearth puts formula after-flame wind 3 and wall formula after-flame wind 4, four angles are put formula after-flame wind 3 and are formed the circle of contact in burner hearth centerline, described wall formula after-flame wind 4 is arranged on the four sides wall of burner hearth, adopt horizontal hunting structure or multiple spot arrangement, effectively eliminate the uncombusted product of diverse location on furnace profile.For avoiding affecting the original aerodynamic field of whole boiler adding too early of wall formula after-flame wind, at the back segment of burning, to strengthen mixing simultaneously, the absolute altitude of wall formula after-flame wind is arranged in the top that formula after-flame wind is put at top layer angle.Embodiment 1:
As shown in Figure 1, described after-flame elegance horizontal hunting structure, the wind that wall formula after-flame wind 4 goes out becomes the circle of contact of wall formula after-flame wind at freeze profile, and is high speed after-flame wind structure.Specifically, on the left and right side wall 2 and forward and backward wall 1 of burner hearth, approach centerline respectively arrange one can only horizontal hunting wall formula after-flame wind, four wall formula after-flame wind form the circle of contact in the centerline of burner hearth.
By adjusting the different angles of after-flame wind outlet, can control the direction and intensity of Furnace Aerodynamic Field positive and reverse return, the more effective residual rotation that reduces, reduces furnace outlet gas temperature deviation.
Embodiment 2:
As shown in Figure 2, described wall formula after-flame wind 4 adopts multiple spot arrangement, adds several fixed wall formula after-flame wind 4, and be middle low speed after-flame wind structure on the wall of four sides wall.Specifically, described wall formula after-flame wind 4 is respectively arranged two on left and right side wall and forward and backward wall.
The region that easily produces the uncombusted products such as CO at four sides wall adds many fixedly wall formula after-flame wind, and low velocity structure in such after-flame elegance use, realizes good mixing by choosing suitable position with ascending air in stove.
The utility model can guarantee boiler efficiency in the generation that guarantees to control when boiler reduces nitrogen oxide uncombusted product, can also reduce the residual rotation of Process In A Tangential Firing simultaneously, reduces furnace outlet gas temperature deviation.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. a Process In A Tangential Firing combined type after-flame wind system, comprise that the angle being arranged on four angles of burner hearth puts formula after-flame wind, four angles are put formula after-flame wind and are formed the circle of contact in burner hearth centerline, it is characterized in that: also comprise wall formula after-flame wind, described wall formula after-flame wind is arranged on the four sides wall of burner hearth, adopt horizontal hunting structure or multiple spot arrangement, the absolute altitude of wall formula after-flame wind is arranged in the top that formula after-flame wind is put at top layer angle.
2. Process In A Tangential Firing combined type after-flame wind system as claimed in claim 1, is characterized in that: described after-flame elegance horizontal hunting structure, the wind that wall formula after-flame wind goes out becomes the circle of contact of wall formula after-flame wind at freeze profile, and is high speed after-flame wind structure.
3. Process In A Tangential Firing combined type after-flame wind system as claimed in claim 2, it is characterized in that: on the left and right side wall and forward and backward wall of burner hearth, approach centerline respectively arrange one can only horizontal hunting wall formula after-flame wind, four wall formula after-flame wind form the circle of contact in the centerline of burner hearth.
4. Process In A Tangential Firing combined type after-flame wind system as claimed in claim 1, is characterized in that: described wall formula after-flame elegance multiple spot arrangement adds several fixed wall formula after-flame wind, and is middle low speed after-flame wind structure on the wall of four sides wall.
5. Process In A Tangential Firing combined type after-flame wind system as claimed in claim 4, is characterized in that: described wall formula after-flame wind is respectively arranged two on left and right side wall and forward and backward wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320824147.3U CN203797692U (en) | 2013-12-16 | 2013-12-16 | Composite over-fire air system for corner-tangential boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320824147.3U CN203797692U (en) | 2013-12-16 | 2013-12-16 | Composite over-fire air system for corner-tangential boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203797692U true CN203797692U (en) | 2014-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320824147.3U Expired - Lifetime CN203797692U (en) | 2013-12-16 | 2013-12-16 | Composite over-fire air system for corner-tangential boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN203797692U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114944A (en) * | 2015-09-17 | 2015-12-02 | 西安西热锅炉环保工程有限公司 | Air staged-combustion vertical and horizontal combined arrangement type over fire air system for tangential boiler |
| CN106287678A (en) * | 2016-08-23 | 2017-01-04 | 中节环(北京)能源技术有限公司 | The burning tissues method of the middle and lower reaches of coal dust jet in circle of contact pulverized coal firing boiler |
| CN113606571A (en) * | 2021-07-07 | 2021-11-05 | 华电电力科学研究院有限公司 | Method for eliminating residual rotation of hearth outlet of four-corner tangential firing boiler |
| CN114060847A (en) * | 2021-10-29 | 2022-02-18 | 华北电力科学研究院有限责任公司 | Control method and device for flue gas temperature deviation of tower furnace hearth of fan mill powder system |
-
2013
- 2013-12-16 CN CN201320824147.3U patent/CN203797692U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114944A (en) * | 2015-09-17 | 2015-12-02 | 西安西热锅炉环保工程有限公司 | Air staged-combustion vertical and horizontal combined arrangement type over fire air system for tangential boiler |
| CN106287678A (en) * | 2016-08-23 | 2017-01-04 | 中节环(北京)能源技术有限公司 | The burning tissues method of the middle and lower reaches of coal dust jet in circle of contact pulverized coal firing boiler |
| CN106287678B (en) * | 2016-08-23 | 2018-09-04 | 中节环(北京)能源技术有限公司 | The burning tissues method of the middle and lower reaches of coal dust jet stream in circle of contact pulverized coal firing boiler |
| CN113606571A (en) * | 2021-07-07 | 2021-11-05 | 华电电力科学研究院有限公司 | Method for eliminating residual rotation of hearth outlet of four-corner tangential firing boiler |
| CN114060847A (en) * | 2021-10-29 | 2022-02-18 | 华北电力科学研究院有限责任公司 | Control method and device for flue gas temperature deviation of tower furnace hearth of fan mill powder system |
| CN114060847B (en) * | 2021-10-29 | 2023-09-19 | 华北电力科学研究院有限责任公司 | Control method and device for smoke temperature deviation of tower furnace hearth of fan mill pulverizing system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |