CN203349279U - Pneumatic ash removal device of boiler - Google Patents
Pneumatic ash removal device of boiler Download PDFInfo
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- CN203349279U CN203349279U CN2013203230063U CN201320323006U CN203349279U CN 203349279 U CN203349279 U CN 203349279U CN 2013203230063 U CN2013203230063 U CN 2013203230063U CN 201320323006 U CN201320323006 U CN 201320323006U CN 203349279 U CN203349279 U CN 203349279U
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Abstract
The utility model relates to a pneumatic ash removal device for accumulated ash at furnace arches and horizontal smoke channels of a coal-fired boiler. Accumulation frictional force of the accumulated ash is removed through the pneumatic property (steaming-driving), a moving bed and the fluidization principle, then an accumulated ash layer reaches a fluidization state, finally, the accumulated ash flows back to a furnace or blown by exhaust gas to be respectively discharged from a bottom ash hopper and a rear smoke channel, and then the ash removing effect is achieved. The pneumatic ash removal device is composed of ash blowing pipes, an ash blowing nozzle (wind cap), an anti-abrasion board, an ash blowing medium conveying pipeline, an adjusting valve, a temperature measurement device, a control system and the like. The ash blowing pipes are tightly attached to a membrane of a wall-wrapping pipe and arranged in different areas, so that ash blowing in the different areas is controlled flexibly. The distance and the relative angle between the ash blowing nozzle and the wall-wrapping pipe can be selected according to needs. By means of the pneumatic ash removal device, the accumulated ash at the furnace arches and the horizontal smoke channels of the boiler can be removed effectively, a heated surface keeps clean, efficiency of the boiler is improved and the safe operation of the boiler is ensured.
Description
Technical field
The utility model belongs to the boiler technology field, relates to a kind of deashing device of boiler, particularly a kind of strength deashing device for coal-burning boiler furnace arch, furnace nose and horizontal flue dust stratification.
Background technology
The boiler heating surface dust stratification is that the solid soot particle of not melting is deposited on heating surface, mainly occurs on the heating surfaces such as boiler platen superheater, reheater, economizer and air preheater.Fouling of heating surface has become the key factor that hinders coal fired power generation unit safety, economical operation, its harm is mainly manifested in the following aspects: (1) reduces heat transfer efficiency, slight slagging scorification and dust stratification cause to conduct heat and weaken, increase fuel quantity to increase heat output for meeting the burden requirement needs, finally cause the unit coal consumption to increase; (2) corrosion of heating surface tubing is accelerated in fouling of heating surface and slagging scorification meeting, shortens the service life of heating surface; (3) can cause device damage and security of operation accident when the fouling of heating surface slagging scorification is serious; as furnace wall cooling top, to form large slag and furnace arch, furnace nose and horizontal flue dust stratification layer thicker; under the effects such as self gravitation and furnace pressure fluctuation, flow perturbation; can fall slag and ash (ash collapses) phenomenon of collapsing; not only may damage boiler plant; also can cause furnace pressure fluctuation and fire to be examined capped, cause combustion instability and fire inspection inefficacy, finally cause fire extinguishing, shut down the blowing out accident.Therefore, remove in time fouling of heating surface most important to guaranteeing boiler safety, economical operation.
Coal-burning boiler is in order to guarantee that the flame degree of filling has adopted distinctive blaze-folding corner structure preferably, so ash-laden gas fails to be convened for lack of a quorum form the negative pressure recirculating zone after furnace arch, furnace nose, makes coal-burning boiler furnace arch, furnace nose upper ramps and horizontal flue become the position of easy dust stratification.On current coal-fired power station boiler, common deashing device has steam sootblower, acoustic wave ash ejector, fuel gas pulse ash blower device etc., but shortcoming is separately arranged, as there is dead angle in steam soot blowing, heating surface is had to impact, easily cause the heating surface blow loss, sonic soot blowing finite energy, particularly these soot blowers all can not be removed the dust stratification of furnace arch, furnace nose and horizontal flue effectively.
The utility model content
The purpose of this utility model is to overcome the existing technical defect of boiler soot blower, proposes a kind of effectively simply, and cost is low, is easy to control boiler strength deashing device applied widely.
For achieving the above object, the technical solution adopted in the utility model is: comprise some groups of blowing pipes on the diaphragm be arranged between boiler furnace arch, furnace nose or horizontal flue bottom enclosure wall tube, and the some groups of sootblowing dielectric transfer pipelines through the thermal insulation separation thermosphere that are connected with blowing pipe, the described blowing pipe of respectively organizing is along the flue gas flow direction step-by-step arrangement, along flue width subregion, arrange, on every group of blowing pipe top, several all are installed and blow grey nozzle, described sootblowing dielectric transfer pipeline is connected with the female pipe of the blowing medium that total magnetic valve is installed respectively, and on each group sootblowing dielectric transfer pipeline, the device for pressure measurement that blows grey magnetic valve and blow grey electromagnetism downstream pressure in order to measurement is installed, at blowing pipe pipe outer wall, on enclosure wall tube pipe outer wall, several temperature measuring equipments are installed, total magnetic valve wherein, blow grey magnetic valve, device for pressure measurement is connected with controller respectively with temperature measuring equipment.
Described device for pressure measurement is pressure sensor, and temperature measuring equipment is thermocouple.
Describedly blow grey nozzle and enclosure wall tube vertical range L is 30～150mm; Blowing the spout of grey nozzle and the angle α of horizontal flue vertical line is 15～55 °.
The described cross sectional shape that blows grey nozzle is circular, square, rectangle or duckbill, and material is heat resisting steel, and is provided with the flame-proof thermal insulation material layer at the outer surface that blows grey nozzle.
Be provided with the wear strip that heat-resistant and wear-resistant material is made on described enclosure wall tube.
Described deashing medium adopts compressed air or the water vapour that pressure is 0.1～5MPa.
The deashing medium adopts the compressed air that pressure is 0.5～1.5MPa.
Described be positioned at the flue zones of different blow the grey direction difference of blowing of grey nozzle, blow grey nozzle sootblowing dielectric purged to direction in burner hearth installing near burner hearth position furnace arch, furnace nose upslope; Blowing grey nozzle in the horizontal flue installation makes sootblowing dielectric to the stove rear to purging.
Wrap greatly the soot blower of one or more combining forms during steam sootblower, acoustic wave ash ejector or pulse soot blower also are installed at boiler top, this place's soot blower is over against horizontal flue middle part, blowing deposited dust vertically downward.
On the female pipe of described blowing medium, stop valve also is installed.
For effectively removing the dust stratification at boiler furnace arch, furnace nose upper ramps and horizontal flue place, the utility model is moving based on gas (vapour), moving bed and fluidization principle carry out deashing, utilize high pressure sootblowing dielectric blowing deposited dust, overcoming dust stratification accumulation frictional force makes the dust heap generation loosening, grieshoch becomes fluidized state by accumulation, makes dust stratification can flow back to burner hearth and enters the furnace hopper discharge or rolled by back-end ductwork and finally discharge by flue gas.Can effectively remove the dust stratification at boiler furnace arch, furnace nose upper ramps and horizontal flue place, keep the heating surfaces such as superheater and reheater clean, improve boiler efficiency, and guarantee safe operation of the boiler.
The beneficial effects of the utility model are: (1) utilizes the high pressure sootblowing dielectric to make the dust stratification layer reach fluidized state, dust stratification has mobility preferably, under the effect of gravity and smoke gas flow, dust stratification is easy to be discharged by boiler furnace hopper and back-end ductwork, good to coal-burning boiler furnace arch, furnace nose and horizontal flue position ash-removal effect especially; (2) the high efficiency pneumatic deashing device system proposed has the characteristics such as blowing pipe flexible arrangement, automatic control, blow grey nozzle (blast cap) adjustable with enclosure wall tube distance and relative angle, utilize temperature measuring equipment to differentiate the dust stratification degree, can realize the high-efficiency low energy consumption deashing; (3) blowing pipe has the self-protection function, and distinctive grey nozzle (blast cap) structure of blowing guarantees that nozzle is not blocked, and device reliability is high; (4) device of the present utility model is simple effectively, cost is low, is easy to control, applied widely.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
The side view that Fig. 2 is Fig. 1;
Fig. 3 is the utility model control system schematic diagram;
Fig. 4 is for blowing the structural representation of grey nozzle (blast cap).
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Referring to Fig. 1,2, the utility model comprises the some groups of blowing pipes 1 on the diaphragm 4 that is arranged on 3 of boiler furnace arch, furnace nose or horizontal flue bottom enclosure wall tubes, and the some groups of sootblowing dielectric transfer pipelines 7 through thermal insulation separation thermosphere 5 that are connected with blowing pipe 1, the described blowing pipe 1 of respectively organizing is along the flue gas flow direction step-by-step arrangement, along flue width subregion, arrange, on every group of blowing pipe 1 top, several all are installed and blow grey nozzle 2, for preventing lower enclosure wall tube blow loss, be provided with the wear strip 6 that heat-resistant and wear-resistant material is made on enclosure wall tube.
In order to realize that zones of different blows grey independent flexible control, blowing pipe can be divided shorter along flue gas flow direction length, be about to whole dust stratification zone and be divided into the more grey unit that blows.Described blowing pipe 1 directly contacts with enclosure wall tube under boiler horizontal gas pass 3 and diaphragm 4, can obtain water or water vapour cooling effect well in enclosure wall tube, therefore have the self-protection function, has improved the operational reliability of blowing pipe.
The high pressure sootblowing dielectric enters blowing pipe 1 by sootblowing dielectric transfer pipeline 7, then via grey nozzle 2 ejections of blowing that are arranged on blowing pipe, blow to dust stratification layer on every side, dust stratification becomes fluidized state by stacking states, thereby dust stratification will be rolled and take away by flue gas and realize the deashing purpose.
Referring to Fig. 3, sootblowing dielectric transfer pipeline 7 of the present utility model is connected with the female pipe 8 of the blowing medium that stop valve 12 and total magnetic valve 14 are installed respectively, and on each group sootblowing dielectric transfer pipeline 7, the device for pressure measurement 10 that blows grey magnetic valve 9 and blow grey electromagnetism downstream pressure in order to measurement is installed, at blowing pipe pipe outer wall, on enclosure wall tube pipe outer wall, temperature measuring equipment 11 is installed, total magnetic valve 14 wherein, blow grey magnetic valve 9, device for pressure measurement 10 is connected with controller 13 respectively with temperature measuring equipment 11, wherein device for pressure measurement 10 is pressure sensor, temperature measuring equipment 11 is thermocouple.Deashing medium of the present utility model adopts compressed air or the water vapour that pressure is 0.1～5MPa.Be preferably compressed air, pressure limit is preferably 0.5～1.5MPa.Also can select multiple deashing medium alternately to blow ash, can overcome like this defect of single deashing medium deashing ability deficiency.
The utility model adopt automatic control system to the deashing pressure medium, the flow that enter each blowing pipe and blow grey nozzle exit pressure, flow is controlled and regulate, control system is comprised of magnetic valve, controller, device for pressure measurement, temperature measuring equipment.
After described device for pressure measurement is arranged on each blowing pipe unit magnetic valve, in order to measure downstream pressure; Described temperature measuring equipment is arranged on the dust stratification positions such as blowing pipe pipe outer wall, enclosure wall tube pipe outer wall, in order to measure, respectively purges regional tube wall temperature.Judge by downstream pressure and blowing pipe wall temperature that dust stratification layer thickness and science are carried out and blow ash.
Referring to Fig. 4, the grey nozzle 2 that blows of the present utility model is 30～150mm with enclosure wall tube vertical range L; Blowing the spout of grey nozzle 2 and the angle α of horizontal flue vertical line is 15～55 °, and the cross sectional shape that blows grey nozzle 2 is circular, square, rectangle or duckbill, and material is heat resisting steel, and is provided with the flame-proof thermal insulation material layer at the outer surface that blows grey nozzle.The downward orifice design of blowing grey nozzle uniqueness makes it have fabulous anti-blockage function.Blow grey arrangement of nozzles directly over blowing pipe, with blowing pipe, directly be communicated with and be connected by welding manner.Blowing grey nozzle and can determine its number, spacing according to blowing grey nozzle arrangements and actual needs on each blowing pipe unit.
The described grey direction of blowing of grey nozzle 2 of blowing can be installed according to blowing different the selection flexibly of gray area, for the furnace arch, furnace nose upslope zone near burner hearth, can will blow the unified making of grey nozzle, only be mounted to and blow ash to burner hearth inner (being anti-flow of flue gas direction), thereby the dust stratification in furnace arch, furnace nose zone is blowed to burner hearth, a part is moved to back-end ductwork with flue gas, and a part is fallen into burner hearth and discharged from furnace hopper.For horizontal flue dust stratification zone, can by blowing, grey nozzle is unified only to be made, is mounted to after stove (i.e. suitable flow of flue gas direction) and blow ash, thereby after the dust stratification of horizontal flue is blowed to stove, and discharge from back-end ductwork with flue gas.
Be positioned at the flue zones of different blow the grey direction of blowing of grey nozzle can be different, near the burner hearth position, as the furnace arch, furnace nose upslope, install and blow grey nozzle sootblowing dielectric is purged to direction in burner hearth; Blowing grey nozzle in the horizontal flue installation makes sootblowing dielectric to the stove rear to purging.So can reach the purpose of furnace arch, furnace nose upper ramps and horizontal flue dust stratification fluidisation, and finally discharge from boiler bottom furnace hopper and back-end ductwork respectively.
In view of the existing soot blower in boiler horizontal gas pass place generally is arranged in the flue both sides, cause the flue middle part to become and purge blind area, the utility model has also proposed to wrap greatly at boiler top the scheme that soot blower is installed.This place's soot blower is over against horizontal flue middle part, blowing deposited dust vertically downward, and this place soot blower can be had a high regard for one or more combinations of anticipating for steam sootblower, acoustic wave ash ejector and fuel gas pulse ash blower.
Claims (10)
1. a boiler strength deashing device, it is characterized in that: comprise the some groups of blowing pipes (1) on the diaphragm (4) be arranged between boiler furnace arch, furnace nose or horizontal flue bottom enclosure wall tube (3), and the some groups of sootblowing dielectric transfer pipelines (7) through thermal insulation separation thermosphere (5) that are connected with blowing pipe (1), the described blowing pipe (1) of respectively organizing is along the flue gas flow direction step-by-step arrangement, along flue width subregion, arrange, on every group of blowing pipe (1) top, several all are installed and blow grey nozzle (2), described sootblowing dielectric transfer pipeline (7) is connected with the female pipe of the blowing medium that total magnetic valve (14) is installed (8) respectively, and on each group sootblowing dielectric transfer pipeline (7), the device for pressure measurement (10) that blows grey magnetic valve (9) and blow grey electromagnetism downstream pressure in order to measurement is installed, at blowing pipe pipe outer wall, several temperature measuring equipments (11) are installed on enclosure wall tube pipe outer wall, total magnetic valve (14) wherein, blow grey magnetic valve (9), device for pressure measurement (10) is connected with controller (13) respectively with temperature measuring equipment (11).
2. boiler strength deashing device according to claim 1, it is characterized in that: described device for pressure measurement (10) is pressure sensor, and temperature measuring equipment (11) is thermocouple.
3. boiler strength deashing device according to claim 1 is characterized in that: the described grey nozzle (2) that blows is 30～150mm with enclosure wall tube vertical range L; Blowing the spout of grey nozzle (2) and the angle α of horizontal flue vertical line is 15～55 °.
4. boiler strength deashing device according to claim 1, it is characterized in that: the described cross sectional shape that blows grey nozzle (2) is circular, square, rectangle or duckbill, material is heat resisting steel, and is provided with the flame-proof thermal insulation material layer at the outer surface that blows grey nozzle.
5. boiler strength deashing device according to claim 1, is characterized in that: be provided with the wear strip (6) that heat-resistant and wear-resistant material is made on described enclosure wall tube (3).
6. boiler strength deashing device according to claim 1, is characterized in that: compressed air or water vapour that described deashing medium employing pressure is 0.1～5MPa.
7. boiler strength deashing device according to claim 6, is characterized in that: the compressed air that deashing medium employing pressure is 0.5～1.5MPa.
8. boiler strength deashing device according to claim 1, it is characterized in that: described be positioned at the flue zones of different blow the grey direction difference of blowing of grey nozzle, blow grey nozzle sootblowing dielectric purged to direction in burner hearth installing near burner hearth position furnace arch, furnace nose upslope; Blowing grey nozzle in the horizontal flue installation makes sootblowing dielectric to the stove rear to purging.
9. boiler strength deashing device according to claim 1, it is characterized in that: at boiler top, wrap greatly the soot blower of one or more combining forms during steam sootblower, acoustic wave ash ejector or pulse soot blower also are installed, this place's soot blower is over against horizontal flue middle part, blowing deposited dust vertically downward.
10. boiler strength deashing device according to claim 1, is characterized in that: on the female pipe of described blowing medium (8), stop valve (12) also is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203230063U CN203349279U (en) | 2013-06-05 | 2013-06-05 | Pneumatic ash removal device of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203230063U CN203349279U (en) | 2013-06-05 | 2013-06-05 | Pneumatic ash removal device of boiler |
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| Publication Number | Publication Date |
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| CN203349279U true CN203349279U (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203230063U Expired - Fee Related CN203349279U (en) | 2013-06-05 | 2013-06-05 | Pneumatic ash removal device of boiler |
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| CN (1) | CN203349279U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307617A (en) * | 2013-06-05 | 2013-09-18 | 西安热工研究院有限公司 | Pneumatic dust cleaning device of boiler |
| CN104122868A (en) * | 2014-07-24 | 2014-10-29 | 国网上海市电力公司 | Online monitoring device of power station boiler soot blower medium |
| CN104456515A (en) * | 2014-07-16 | 2015-03-25 | 中国神华能源股份有限公司 | Boiler operation method |
| CN106801864A (en) * | 2017-03-24 | 2017-06-06 | 苏州迪森生物能源有限公司 | One kind loosens wind apparatus |
| CN107676802A (en) * | 2017-09-19 | 2018-02-09 | 华电电力科学研究院 | A kind of rotary blast cap and its method of work for cigarette air channel soot blowing |
| CN108224464A (en) * | 2018-02-27 | 2018-06-29 | 西安西热节能技术有限公司 | It is a kind of prevent coal-burning boiler denitration be transformed after tail portion dust deposit in flue device |
| CN109631062A (en) * | 2019-02-22 | 2019-04-16 | 中国科学院力学研究所 | A kind of gas pulse soot blower cooling based on water mist |
| CN110568014A (en) * | 2019-09-26 | 2019-12-13 | 安徽工业大学 | Intelligent accumulated dust sampling device and method for online measurement of effective thermal conductivity of accumulated dust |
| CN111473350A (en) * | 2020-04-20 | 2020-07-31 | 华电电力科学研究院有限公司 | Horizontal flue dust deposition cleaning system and working method thereof |
| CN111686955A (en) * | 2020-07-29 | 2020-09-22 | 杭州华电能源工程有限公司 | Coal-fired boiler pneumatic soot blowing system nozzle with flat horn-shaped lower spray pipe and soot blowing method |
-
2013
- 2013-06-05 CN CN2013203230063U patent/CN203349279U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307617A (en) * | 2013-06-05 | 2013-09-18 | 西安热工研究院有限公司 | Pneumatic dust cleaning device of boiler |
| CN104456515A (en) * | 2014-07-16 | 2015-03-25 | 中国神华能源股份有限公司 | Boiler operation method |
| CN104456515B (en) * | 2014-07-16 | 2016-04-13 | 中国神华能源股份有限公司 | A kind of operation method of boiler |
| CN104122868A (en) * | 2014-07-24 | 2014-10-29 | 国网上海市电力公司 | Online monitoring device of power station boiler soot blower medium |
| CN106801864A (en) * | 2017-03-24 | 2017-06-06 | 苏州迪森生物能源有限公司 | One kind loosens wind apparatus |
| CN107676802B (en) * | 2017-09-19 | 2023-09-12 | 华电电力科学研究院有限公司 | Rotary hood for soot blowing of smoke duct and working method thereof |
| CN107676802A (en) * | 2017-09-19 | 2018-02-09 | 华电电力科学研究院 | A kind of rotary blast cap and its method of work for cigarette air channel soot blowing |
| CN108224464A (en) * | 2018-02-27 | 2018-06-29 | 西安西热节能技术有限公司 | It is a kind of prevent coal-burning boiler denitration be transformed after tail portion dust deposit in flue device |
| CN109631062B (en) * | 2019-02-22 | 2023-09-05 | 中国科学院力学研究所 | Air pulse soot blower based on water mist cooling |
| CN109631062A (en) * | 2019-02-22 | 2019-04-16 | 中国科学院力学研究所 | A kind of gas pulse soot blower cooling based on water mist |
| CN110568014A (en) * | 2019-09-26 | 2019-12-13 | 安徽工业大学 | Intelligent accumulated dust sampling device and method for online measurement of effective thermal conductivity of accumulated dust |
| CN111473350A (en) * | 2020-04-20 | 2020-07-31 | 华电电力科学研究院有限公司 | Horizontal flue dust deposition cleaning system and working method thereof |
| CN111686955A (en) * | 2020-07-29 | 2020-09-22 | 杭州华电能源工程有限公司 | Coal-fired boiler pneumatic soot blowing system nozzle with flat horn-shaped lower spray pipe and soot blowing method |
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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: 20131218 Termination date: 20150605 |
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| EXPY | Termination of patent right or utility model |