CN204213911U - The wall-tangential boiler structure of furnace outlet gas temperature deviation can be reduced - Google Patents
The wall-tangential boiler structure of furnace outlet gas temperature deviation can be reduced Download PDFInfo
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- CN204213911U CN204213911U CN201420585952.XU CN201420585952U CN204213911U CN 204213911 U CN204213911 U CN 204213911U CN 201420585952 U CN201420585952 U CN 201420585952U CN 204213911 U CN204213911 U CN 204213911U
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Abstract
The utility model discloses a kind of wall-tangential boiler structure that can reduce furnace outlet gas temperature deviation, Secondary Air (3) is arranged on the four sides water-cooling wall (2) in boiler furnace (1), on the corner that the water-cooling wall (2) that burnout degree (4) is arranged in boiler furnace (1) inner second air (3) top is formed, Secondary Air (3) adopts nonlinear positive pagoda air distribution structure, burnout degree (4) the adjustable plate aperture be on diagonal angle is identical, and burnout degree (4) the adjustable plate aperture on two groups of diagonal angles is respectively 30% aperture and 90% aperture.The utility model, under the prerequisite ensureing boiler combustion efficiency and furnace outlet NOx value, effectively reduces furnace outlet gas temperature deviation, ensures safety and the economical operation of boiler.
Description
Technical field
The utility model relates to a kind of wall-tangential boiler structure that can reduce furnace outlet gas temperature deviation, belongs to Process In A Tangential Firing field of combustion technology.
Background technology
Tangential firing mode boiler is mainly used in the burn higher bituminous coal of fugitive constituent or meager coal, and tangential boiler is divided into angle to cut cutting two kinds with wall.Most of large coal-fired power plant boiler adopts Terms of Corner Tangential Combustion, the circle of contact is become at freeze profile, due to Terms of Corner Tangential Combustion be by burner arrangement on four angles, so burner is distant from flame kernel, the ability of entrainmenting of flame is low, and suffered projection thermic load is little, and temperature levels is low, ignition condition is poor, is unfavorable for stability and the burnout rate of burning.And due to the existence of Residual Rotation at Furnace Outlet, horizontal flue temperature distributing disproportionation can be caused again even, a series of result such as to be heated uneven, this phenomenon again can be serious along with the increase of boiler controller system.
For solving quadrangle tangential circle Problems existing, a kind of four walls tangential burning technology grows up as a kind of new tangential combustion, and wall-tangential boiler (Fig. 2) has following features usually: Secondary Air is arranged on the four sides water-cooled wall in burner hearth.Burnout degree is arranged in burner hearth above primary and secondary air, on water-cooling wall corner.
Because burner arrangement is on water-cooled wall, burner outlet has larger space, and air-flow has enough rigidity in stove, form the stable circle of contact, and the impact that air-flow is not vulnerable to water-cooling wall causes subsides wall; Therefore, theory analysis, wall-arranges that tangential firing mode can reduce the gas temperature windage of burner hearth both sides effectively; In burner hearth, temperature field is more even, can maximally utilise furnace cavity, be conducive to Thorough combustion, reduces unburned carbon loss.But find in actual motion, in the Secondary Air air distribution mode that tangentially firing boiler is main (equal distribution wind, positive pagoda air distribution, the air distribution of falling pagoda and air distribution mode with a tight waist), all there is the problem that furnace outlet gas temperature deviation is large, more than 100 DEG C (normal value should below 50 DEG C), the burnout degree playing racemization be little to reduction furnace outlet gas temperature deviation action.And furnace outlet gas temperature deviation will cause greatly Steam Temperature for Boiler deviation large, the side that simultaneous temperature is high easily makes heating surface overtemperature of tube wall, has a strong impact on safety and the economical operation of boiler.
Summary of the invention
The technical problems to be solved in the utility model is: provide a kind of wall-tangential boiler structure that can reduce furnace outlet gas temperature deviation, can overcome the deficiencies in the prior art
The technical solution of the utility model is: the wall-tangential boiler structure that can reduce furnace outlet gas temperature deviation, it comprises boiler furnace, water-cooling wall, Secondary Air and burnout degree, Secondary Air is arranged on the four sides water-cooling wall in boiler furnace, burnout degree is arranged on the corner of the water-cooling wall formation above boiler furnace inner second air, Secondary Air adopts nonlinear positive pagoda air distribution structure, the burnout degree adjustable plate aperture be on diagonal angle is identical, and the burnout degree adjustable plate aperture on two groups of diagonal angles is respectively 30% aperture and 90% aperture.
Secondary Air adopts the air distribution structure aperture from the bottom to top of nonlinear positive pagoda to be respectively 95%, 85%, 70%, 60%, 55%, 50%, 35% and 30%.
Compared with the prior art, the utility model has following beneficial effect:
1. Secondary Air adopts the air distribution mode of nonlinear positive pagoda, lower floor's Secondary Air aperture comparatively large (90%), upper strata Secondary Air aperture less (30%), this air distribution mode makes the rotatory inertia of the circle of contact weaken gradually along with the increase of furnace height, the rotatory inertia of lower floor's burner can not be delivered to upper strata burner along with the rising of inner flue gas of the stove, result is that furnace outlet gas temperature deviation reduces, and actual furnace outlet gas temperature windage is down to 60 DEG C by 110 DEG C before adjusting.
2. the burnout degree adjustable plate aperture be on diagonal angle is identical, and the burnout degree adjustable plate aperture on two groups of diagonal angles is respectively 30% aperture and 90% aperture, sees that 30% aperture is taked at burnout degree #1, #3 angle, 90% aperture is taked at #2, #4 angle from Fig. 3.This air distribution mode of burnout degree ensures that there is stronger rigidity at #2, #4 angle liquidated to suppress the residual rotation in stove, and actual furnace outlet gas temperature windage is the enterprising step-down to 30 DEG C in basis of 60 DEG C.
Accompanying drawing explanation
Figure l is furnace height direction of the present utility model sectional view;
Fig. 2 burner hearth Secondary Air of the present utility model horizontal direction sectional view;
Fig. 3 burner hearth burnout degree of the present utility model horizontal direction sectional view.
Detailed description of the invention
embodiment 1:composition graphs 1, Fig. 2 and 3 illustrate present embodiment, and its system equipment has: boiler furnace 1, water-cooling wall 2, Secondary Air 3 and burnout degree 4.Wherein Secondary Air 3 is arranged on the four sides water-cooled wall in burner hearth, and burnout degree 4 is arranged in above burner hearth inner second air, on water-cooling wall corner.
Positive pagoda air distribution mode each layer Secondary Air aperture sees the following form:
| Secondary air register | AA | AB | BC | CC | DD | DE | EF | FF |
| Aperture (%) | 95 | 85 | 70 | 60 | 55 | 50 | 35 | 30 |
This air distribution mode makes the rotatory inertia of the circle of contact weaken gradually along with the increase of furnace height, the rotatory inertia of lower floor's burner can not be delivered to upper strata burner along with the rising of inner flue gas of the stove, result is that furnace outlet gas temperature deviation reduces, and actual furnace outlet gas temperature windage is down to 60 DEG C by 110 DEG C before adjusting.
The burnout degree 4 adjustable plate aperture be on diagonal angle is identical, and the burnout degree 4 adjustable plate aperture on two groups of diagonal angles is respectively 30% aperture and 90% aperture.Burnout degree #1, #3 takes at angle 30% aperture concretely, #2, #4 angle takes 90% aperture.This air distribution mode of burnout degree ensures that there is stronger rigidity at #2, #4 angle liquidated to suppress the residual rotation in stove, and actual furnace outlet gas temperature windage is the enterprising step-down to 30 DEG C in basis of 60 DEG C.
This structure meets coal dust firing principle, is applied actual, under the prerequisite ensureing boiler combustion efficiency and furnace outlet NOx value, effectively reduces furnace outlet gas temperature deviation, ensures safety and the economical operation of boiler.
Claims (2)
1. one kind can reduce the wall-tangential boiler structure of furnace outlet gas temperature deviation, it comprises boiler furnace (1), water-cooling wall (2), Secondary Air (3) and burnout degree (4), Secondary Air (3) is arranged on the four sides water-cooling wall (2) in boiler furnace (1), on the corner that the water-cooling wall (2) that burnout degree (4) is arranged in boiler furnace (1) inner second air (3) top is formed, it is characterized in that: Secondary Air (3) adopts nonlinear positive pagoda air distribution structure, burnout degree (4) the adjustable plate aperture be on diagonal angle is identical, burnout degree (4) adjustable plate aperture on two groups of diagonal angles is respectively 30% aperture and 90% aperture.
2. the wall-tangential boiler structure that can reduce furnace outlet gas temperature deviation according to claim 1, is characterized in that: Secondary Air (3) adopts the air distribution structure aperture from the bottom to top of nonlinear positive pagoda to be respectively 95%, 85%, 70%, 60%, 55%, 50%, 35% and 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585952.XU CN204213911U (en) | 2014-10-11 | 2014-10-11 | The wall-tangential boiler structure of furnace outlet gas temperature deviation can be reduced |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585952.XU CN204213911U (en) | 2014-10-11 | 2014-10-11 | The wall-tangential boiler structure of furnace outlet gas temperature deviation can be reduced |
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| CN204213911U true CN204213911U (en) | 2015-03-18 |
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| CN201420585952.XU Expired - Fee Related CN204213911U (en) | 2014-10-11 | 2014-10-11 | The wall-tangential boiler structure of furnace outlet gas temperature deviation can be reduced |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713064A (en) * | 2015-03-31 | 2015-06-17 | 贵州电力试验研究院 | Combustion adjustment method for supercritical boiler capable of performing blending combustion of coke oven gas |
| CN106765063A (en) * | 2016-12-06 | 2017-05-31 | 华中科技大学 | A kind of Secondary Air is classified burning boiler |
| WO2022028275A1 (en) * | 2020-08-04 | 2022-02-10 | 上海交通大学 | Wall-arranged giant ring-shaped direct-current pulverized coal burner |
| 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 |
-
2014
- 2014-10-11 CN CN201420585952.XU patent/CN204213911U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713064A (en) * | 2015-03-31 | 2015-06-17 | 贵州电力试验研究院 | Combustion adjustment method for supercritical boiler capable of performing blending combustion of coke oven gas |
| CN106765063A (en) * | 2016-12-06 | 2017-05-31 | 华中科技大学 | A kind of Secondary Air is classified burning boiler |
| WO2022028275A1 (en) * | 2020-08-04 | 2022-02-10 | 上海交通大学 | Wall-arranged giant ring-shaped direct-current pulverized coal burner |
| 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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| 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: 20150318 Termination date: 20151011 |
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| EXPY | Termination of patent right or utility model |