CN205424906U - No recirculating fan driven layer furnace gas recirculation and regulation and control system thereof - Google Patents
No recirculating fan driven layer furnace gas recirculation and regulation and control system thereof Download PDFInfo
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- CN205424906U CN205424906U CN201620206264.7U CN201620206264U CN205424906U CN 205424906 U CN205424906 U CN 205424906U CN 201620206264 U CN201620206264 U CN 201620206264U CN 205424906 U CN205424906 U CN 205424906U
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- flue gas
- gas recirculation
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Abstract
The utility model discloses a no recirculating fan driven layer furnace gas recirculation and regulation and control system thereof, this system includes: layer furnace, air heater, a wind system that constitutes by primary blower and tuber pipe way all, the system of discharging fume by dust remover, draught fan, exit flue, desulfurizing tower and chimney constitute connects gradually the flue gas circulation system who constitutes by draught fan, exit flue, gas recirculation pipeline, primary blower, a tuber pipe way, flue gas after a dust removal wind in recycled flue and a tuber pipe are said mixes, then sends into a layer furnace by the primary blower, the utility model discloses wind is sent into one time through recirculation system to flue gas after removing dust the afterbody, reduces by one time the wind oxygen content, and reduction NOx's formation reaches the purpose of reduction of discharging.
Description
Technical field
This utility model relates to grate firing boiler and controls discharged nitrous oxides technical field, is specifically related to flue gas recirculation and the regulator control system thereof driven without recirculation blower.
Background technology
China's current Industrial Boiler recoverable amount 590,000, wherein coal-burned industrial boiler about 500,000, year coal consumption about 700,000,000 tons, account for the 20% of whole nation year consumption coal total amount, coal-burned industrial boiler causes pollutant emission higher because of problems such as burning and system supports, the flue dust of discharge in 2012, SO2Whole nation total emission volumn 32%, 26% and 15% is accounted for respectively with NOx.In general, Industrial Boiler energy resource consumption and disposal of pollutants all occupy whole nation industrial trade second, be only second to station boiler, but the pollution caused in the Industrial Boiler discharge of whole nation key cities alreadys more than station boiler.
Coal-burned industrial boiler divides by measure, and 70% is above grate firing boiler, wherein based on chain-grate boiler and fixed grate boiler.Due to many factors such as ature of coal, design, system matches, automatic control, management, reach the boiler of " Industrial Boiler energy efficiency market and efficiency grade " standard II grade and " emission standard of air pollutants for boilers " less than 5% simultaneously.Along with coal-burned industrial boiler efficiency and environmental-protecting performance requirement are improved constantly by country, original chain-grate industrial boiler systems technology and meet requirement being difficult to product.
" 12 " period, country increases Environmental Inputs on the basis of dedusting, desulfurization technology become increasingly popular, put into effect the strict standard controlling nitrogen oxides, although promulgate at first is the standard controlling station boiler discharged nitrous oxides, future at environmental requirement increasingly stringent, Industrial Boiler and kiln also can become the object that discharged nitrous oxides controls, and therefore, research and development control the correlation technique of NO_x formation and discharge will become recent emphasis.
In the traveling-grate stoker grate furnace that China is existing, general employing controls NO in upper furnace spray ammonia technology or enforcement SCR denitrating flue gas post-processing technology etc.XGeneration and discharge.And spray merely ammonia removal NOXAlthough technology method is simple, but removal efficiency is low, at every moment will consume the material such as ammonia, carbamide, and operating cost is higher.As for SCR ammonia to be sprayed, also to accelerate elimination reaction by expensive catalyst, operating cost is higher.Therefore, exploitation reduces grate furnace NOXDischarge new method or by original control NOXThe technology of discharge is applied in grate furnace necessary.Flue gas recirculation is a kind of important reduction NOXThe technology of discharge, but, the most a lot of use flue gas recirculation reduce NOXThe technology of discharge all adds recirculation blower in recirculating system, adds the power consumption of system and the complexity of system, and recirculation blower belongs to rotating machinery, adds environmental noise, brings great inconvenience to reality transformation.
Summary of the invention
For the problem overcoming above-mentioned prior art to exist, the purpose of this utility model is to provide the grate furnace flue gas recirculation driven without recirculation blower and regulator control system thereof, it is possible to effectively reduce the generation of NOx, it is achieved the technical goal of reduction of discharging.
In order to achieve the above object, this utility model be the technical scheme is that
The grate furnace flue gas recirculation driven without recirculation blower and regulator control system thereof, including grate furnace 1, it is successively set on the air preheater 2 on grate furnace 1 back-end ductwork 12, cleaner unit 3 and smoke evacuation air-introduced machine 4,11 points of two-way of exit flue of smoke evacuation air-introduced machine 4 outlet, one tunnel connects with chimney 6 through desulfurizing tower 5, flue gas recirculation pipeline 8 of separately leading up to connects with First air pipeline 10, being provided with primary blower 7 on First air pipeline 10, the outlet of primary blower 7 is connected with grate furnace distribution plenum 13 by air preheater 2 or directly connects with grate furnace distribution plenum 13；Described primary blower 7 and First air pipeline 10 constitute primary air system, and described cleaner unit 3, smoke evacuation air-introduced machine 4, exit flue 11, desulfurizing tower 5 and chimney 6 constitute smoke evacuation system；Described smoke evacuation air-introduced machine 4, exit flue 11, flue gas recirculation pipeline 8, primary blower 7 and First air pipeline 10 constitute smoke circulating system.
The recirculating air volume of described smoke circulating system passes through flow regulator electrical adjustable.
Described flow regulator includes the electrically operated valve 9 being arranged on flue gas recirculation pipeline 8 and is arranged on the electric drive semicircle slide plate flow control device 14 of flue gas recirculation pipeline 8 porch.
Described electric drive semicircle slide plate flow control device 14 includes the semicircle slide plate 15 being close to flue gas recirculation pipeline 8 inwall, the guide rod 16 being connected with semicircle slide plate 15 through flue gas recirculation pipe head notch 17, the motor drive mechanism 18 being used for driving semicircle slide plate 15 to slide along flue gas recirculation pipe head notch 17 being connected with semicircle slide plate 15 by guide rod 16.
For Flange joint or be welded to connect between flue gas recirculation pipeline 8 and exit flue 11 and First air pipeline 10 in described smoke circulating system.
Flue gas recirculation pipeline 8 in described flue gas recirculation system and be connected or tilt connection for vertical between exit flue 11.
The most relatively, innovative point of the present utility model, advantage and good effect are as follows:
1, according to flue gas recirculation system of the present utility model, recycled for flue gas after afterbody dedusting flue can be sent into primary blower entrance, then send into grate furnace distribution plenum through First air flue, air preheater, advantageously reduce First air oxygen content, reduce the generation of nitrogen oxides.
2, being different from " boiler flue gas recirculation device " (patent No.: 200920301966.3), this utility model does not increase recirculation blower, and system is simpler energy-conservation.
3, being different from " a kind of flue gas recirculation system for reducing NO_x formation " (patent No.: 201520039716.2), this utility model is connected with the exit flue after smoke evacuation air-introduced machine for key-course burner discharged nitrous oxides, flue gas recirculation flue.
4, being different from " a kind of boiler tail flue gas EGR, flue gas system and boiler " (patent No.: 201320613956.X), this utility model is used for key-course burner discharged nitrous oxides.
Accompanying drawing explanation
Fig. 1 is the grate furnace flue gas recirculation system schematic that this utility model drives without recirculation blower.
Fig. 2 is recirculating gas duct entrance electric drive semicircle flow control device position view.
Fig. 3 is recirculating gas duct and exit flue type of attachment schematic diagram, wherein: Fig. 3 (a) is vertical connection, and Fig. 3 (b) is for tilting to connect.
Fig. 4 is electric drive semicircle slide plate flow control device structural representation, wherein: Fig. 4 (a) with exit flue, Fig. 4 (b) non-band exit flue.
Detailed description of the invention
With detailed description of the invention, this utility model is described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, grate furnace flue gas recirculation that this utility model drives without recirculation blower and regulator control system thereof, including grate furnace 1, it is successively set on the air preheater 2 on grate furnace 1 back-end ductwork 12, cleaner unit 3 and smoke evacuation air-introduced machine 4, 11 points of two-way of exit flue of smoke evacuation air-introduced machine 4 outlet, one tunnel connects with chimney 6 through desulfurizing tower 5, flue gas recirculation pipeline 8 of separately leading up to connects with First air pipeline 10, primary blower 7 it is provided with on First air pipeline 10, the outlet of primary blower 7 is connected with grate furnace distribution plenum 13 by air preheater 2 or directly connects with grate furnace distribution plenum 13；Described primary blower 7 and First air pipeline 10 constitute primary air system, and described cleaner unit 3, smoke evacuation air-introduced machine 4, exit flue 11, desulfurizing tower 5 and chimney 6 constitute smoke evacuation system；Described smoke evacuation air-introduced machine 4, exit flue 11, flue gas recirculation pipeline 8, primary blower 7 and First air pipeline 10 constitute smoke circulating system.
As preferred implementation of the present utility model, the recirculating air volume of described smoke circulating system passes through flow regulator electrical adjustable.
As in figure 2 it is shown, described flow regulator includes the electrically operated valve 9 being arranged on flue gas recirculation pipeline 8 and is arranged on the electric drive semicircle slide plate flow control device 14 of flue gas recirculation pipeline 8 porch.
As shown in the Fig. 4 (a) in Fig. 4 and Fig. 4 (b), described electric drive semicircle slide plate flow control device 14 includes the semicircle slide plate 15 being close to flue gas recirculation pipeline 8 inwall, the guide rod 16 being connected with semicircle slide plate 15 through flue gas recirculation pipe head notch 17, the motor drive mechanism 18 being used for driving semicircle slide plate 15 to slide along flue gas recirculation pipe head notch 17 being connected with semicircle slide plate 15 by guide rod 16.
As indicated by a broken line in fig. 1, the First air pipeline 10 in described smoke circulating system has two kinds of arrangement forms, and one is through air preheater 2, and another kind is without air preheater 2.
As preferred implementation of the present utility model, it is Flange joint between flue gas recirculation pipeline and exit flue and the First air pipeline in described smoke circulating system or is welded to connect.
As shown in the Fig. 3 (a) in Fig. 3 and Fig. 3 (b), the flue gas recirculation pipeline 8 in described flue gas recirculation system and be vertical to be connected or tilt connection between exit flue 11.
Operation principle of the present utility model: the flue gas produced by grate furnace 1, under the effect of smoke evacuation air-introduced machine 4, successively through air preheater 2, back-end ductwork 12, cleaner unit 3, after arriving smoke evacuation air-introduced machine 4, it is divided into two-way, one tunnel enters air through desulfurizing tower 5 and chimney 6, another road is under the effect of pressure reduction, First air pipeline 10 is flowed to through flue gas recirculation flue 8, mix with First air therein, then under the effect of primary blower 7, enter grate furnace distribution plenum 13 after air preheater 2 or without air preheater 2, participate in burning through distribution.Owing to flue gas mixes with First air, oxygen content in the First air that participation burns is made to reduce, it is possible to effectively to reduce the nitrogen oxides that combustion process produces, thus reach to reduce grate furnace NOXThe purpose of discharge.The flow of circulating flue gas can be adjusted by electric drive semicircle slide plate flow control device 14 and electrically operated valve 9, the wherein operation principle of electric drive semicircle slide plate flow control device 14: recirculating gas duct 8 inwall is close to by semicircle slide plate 15, on it, connection has guide rod 16, guide rod 16 is through flue gas recirculation pipe head notch 17 and stretches out flue outer wall, play guide rod effect, and connecting motor drive mechanism 18, motor drive mechanism 18 plays and controls and the effect of fixing semicircle slide plate 15.Control the semicircle slide plate 15 notch along flue gas recirculation flue 8 by motor drive mechanism 18 to slide, regulate its length stretching into exit flue 11 to regulate flue gas flow.
Claims (6)
1. the grate furnace flue gas recirculation driven without recirculation blower and regulator control system thereof, it is characterized in that: include grate furnace (1), the air preheater (2) being successively set on grate furnace (1) back-end ductwork (12), cleaner unit (3) and smoke evacuation air-introduced machine (4), exit flue (11) point two-way that smoke evacuation air-introduced machine (4) exports, one tunnel connects with chimney (6) through desulfurizing tower (5), another road is under the effect of pressure reduction, connected with First air pipeline (10) by flue gas recirculation pipeline (8), primary blower (7) it is provided with on First air pipeline (10), the outlet of primary blower (7) is connected with grate furnace distribution plenum (13) by air preheater (2) or directly connects with grate furnace distribution plenum (13)；Described primary blower (7) and First air pipeline (10) constitute primary air system, and described cleaner unit (3), smoke evacuation air-introduced machine (4), exit flue (11), desulfurizing tower (5) and chimney (6) constitute smoke evacuation system；Described smoke evacuation air-introduced machine (4), exit flue (11), flue gas recirculation pipeline (8), primary blower (7) and First air pipeline (10) constitute smoke circulating system.
The grate furnace flue gas recirculation driven without recirculation blower the most according to claim 1 and regulator control system thereof, it is characterised in that: the recirculating air volume of described smoke circulating system passes through flow regulator electrical adjustable.
The grate furnace flue gas recirculation driven without recirculation blower the most according to claim 2 and regulator control system thereof, it is characterised in that: described flow regulator includes the electrically operated valve (9) being arranged on flue gas recirculation pipeline (8) and is arranged on electric drive semicircle slide plate flow control device (14) of flue gas recirculation pipeline (8) porch.
The grate furnace flue gas recirculation driven without recirculation blower the most according to claim 3 and regulator control system thereof, it is characterized in that: described electric drive semicircle slide plate flow control device (14) includes being close to the semicircle slide plate (15) of flue gas recirculation pipeline (8) inwall, the guide rod (16) being connected with semicircle slide plate (15) through flue gas recirculation pipe head notch (17), by guide rod (16) be connected with semicircle slide plate (15) for the motor drive mechanism (18) driving semicircle slide plate (15) to slide along flue gas recirculation pipe head notch (17).
The grate furnace flue gas recirculation driven without recirculation blower the most according to claim 1 and regulator control system thereof, it is characterised in that: it is Flange joint or be welded to connect between flue gas recirculation pipeline (8) and exit flue (11) and the First air pipeline (10) in described smoke circulating system.
The grate furnace flue gas recirculation driven without recirculation blower the most according to claim 1 and regulator control system thereof, it is characterised in that: the flue gas recirculation pipeline (8) in described flue gas recirculation system be vertical to be connected or tilt connection between exit flue (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620206264.7U CN205424906U (en) | 2016-03-17 | 2016-03-17 | No recirculating fan driven layer furnace gas recirculation and regulation and control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620206264.7U CN205424906U (en) | 2016-03-17 | 2016-03-17 | No recirculating fan driven layer furnace gas recirculation and regulation and control system thereof |
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| CN205424906U true CN205424906U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620206264.7U Expired - Fee Related CN205424906U (en) | 2016-03-17 | 2016-03-17 | No recirculating fan driven layer furnace gas recirculation and regulation and control system thereof |
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| CN (1) | CN205424906U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650620A (en) * | 2016-03-17 | 2016-06-08 | 马维珍 | Layer-burning boiler flue gas recirculation free of recirculation fan drive and regulation control system of flue gas recirculation |
| CN107149866A (en) * | 2017-05-24 | 2017-09-12 | 广东理文造纸有限公司 | CFBB flue gas recirculation and SNCR denitration system |
-
2016
- 2016-03-17 CN CN201620206264.7U patent/CN205424906U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650620A (en) * | 2016-03-17 | 2016-06-08 | 马维珍 | Layer-burning boiler flue gas recirculation free of recirculation fan drive and regulation control system of flue gas recirculation |
| CN107149866A (en) * | 2017-05-24 | 2017-09-12 | 广东理文造纸有限公司 | CFBB flue gas recirculation and SNCR denitration system |
| CN107149866B (en) * | 2017-05-24 | 2019-02-19 | 广东理文造纸有限公司 | Circulating fluidized bed boiler flue gas recirculation and SNCR denitration system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180514 Address after: 710048 Xu Bang tower, 28 Xingqing South Road, Beilin District, Xi'an, Shaanxi Patentee after: Xi'an Jiaotong University Siyuan Technology Co., Ltd. Address before: 710100 2, unit 18, Fuli City, 366 space Avenue, Xi'an, Shaanxi, China, 18 Patentee before: Ma Weizhen |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20200317 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |