CN204503291U - Coal pulverizer negative pressure dust collector - Google Patents
Coal pulverizer negative pressure dust collector Download PDFInfo
- Publication number
- CN204503291U CN204503291U CN201520137088.1U CN201520137088U CN204503291U CN 204503291 U CN204503291 U CN 204503291U CN 201520137088 U CN201520137088 U CN 201520137088U CN 204503291 U CN204503291 U CN 204503291U
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- negative pressure
- female pipe
- dust
- air preheater
- aspiration
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Abstract
This utility model belongs to electricity power field, relates to a kind of controller of coal mill of boiler negative pressure dust collector.Technical scheme: comprise air preheater exhaust pass, it is characterized in that: add the aspiration of negative pressure mother pipe at air preheater exhaust pass, many bypass duct are divided after female pipe adding Hand-operated butterfly valve, dreg discharging box is accessed after bypass duct adding pneumatic knife gate valve, flushing line is added near female pipe Hand-operated butterfly valve place, flushing line is established manual flange door, dreg discharging box adds spray pipeline.Beneficial effect: install the aspiration of negative pressure mother pipe additional at air preheater exhaust pass, by the dust in the negative pressure absorbing coal pulverizer dreg discharging box of air preheater exhaust pass, the upper installation Hand-operated butterfly valve of female pipe is as the total door of Non-follow control of Negative Pressure Dust Collecting System, and during the female pipe of the aspiration of negative pressure runs, this total door is in normally open; Connect a road flushing line on the female pipe top of the aspiration of negative pressure, the dust stratification in the female pipe of periodic flushing negative pressure, dreg discharging box installs a set of spray pipeline additional, makes pebble coal keep moist, causes secondary pollution after avoiding pebble coal to discharge to environment.
Description
Technical field
This utility model belongs to electricity power field, relates to a kind of controller of coal mill of boiler negative pressure dust collector.
Background technology
Power plant commonly uses dust collection equipment and usually adopts following three kinds of forms: mobile negative-pressure vacuum sweeper, fixing dry type dust suction unit, fixing wet type dust suction device group, but these three kinds of equipment respectively have pluses and minuses.
One, vehicular the aspiration of negative pressure car:
The special diesel-driven generator of this outfit directly drags high negative pressure roots blower, prime configuration fiber bag precipitator and storage bin, and has dust-removal cloth-bag automatic back blow and automatic discharging function.Technical characterstic: aesthetic in appearance, mobility strong, can complete the dust suction work of multiple factory building dust suction pipe network, dust suction negative pressure is higher.
Shortcoming: roots blower air quantity is little, dust removal ability is obviously not enough, and particularly in the face of the dust suction pipe network that large-sized boiler is huge, this shortcoming is more outstanding; This device structure is complicated, and various Electrically operated gate, pneumatic door are numerous, and in order to meet the needs of weight many troublesome operation program of this system, spy has carried out by the programme-control of computer management each operating procedure.Make stored program controlled very loaded down with trivial details, increase operation maintenance amount, by the impact of numerous executing agency and primary detecting element reliability, this system is difficult to ensure steady in a long-term operation, and the consumable accessory such as the filter bag of equipment is changed frequent, and operating cost increases thereupon; Operate loaded down with trivial details, need 3,4 people to operate by completion system altogether; Secondary pollution can be caused when dry ash discharge and internal cleaning.Owing to not taking explosion precaution, there is severe compromise when sucking coal dust, many vacuum sweeper users such as electricity generating corporation, Ltd of current Guo electricity electric power Datong District, Datang Qitaihe electricity generating corporation, Ltd, have eliminated vacuum sweeper, have been replaced by fixed the aspiration of negative pressure equipment.
Two, fixing dry type dust collecting device:
The mode that deduster adopts cyclone dust removal and bag-type dust to combine mostly.In working order, first dust enters cyclone dust collectors, carries out one-level meal and is separated with foreign material, efficiency of dust collection 75%.Residue dust enters secondary sack cleaner and carries out secondary separation, efficiency of dust collection 99.9%, and the tail gas after purification enters air through roots blower.Dust adopts and regularly shuts down discharge.Dust absorption fan adopts roots blower.Technical characterstic: efficiency of dust collection is high, exhaust emissions is up to standard; The high needs meeting dust suction operating mode of blower negative pressure.
Shortcoming: deduster feed bin limited volume, when inhaling a large amount of dust, discharge need be shut down in midway; Sack cleaner Inlet dust excessive concentration, exceedes deduster disposal ability, causes filter bag blowback frequent breakage too fast, increases operating cost and maintenance; During discharge of materials, easy airborne dust causes secondary pollution; Owing to not taking explosion precaution, when sucking coal dust, there is severe compromise.This equipment has been eliminated by many users such as power plant, Nanjing, current Huaneng Group, Anshan iron and steel plant power plant for self-supply, fix according to statistics dry type dust collecting device at home normal operation ratio less than 50%.
Three, fixing wet type dust exhaust apparatus:
Deduster adopts wet cyclome and Multi-stage spiral wet scrubber mostly.Dust carries out one-level separation through Whirlwind wet collector, efficiency 90%, and residue dust is through the secondary separation of secondary Multi-stage spiral wet scrubber, and efficiency 99%, tail gas enters in boiler back end ductwork through blower fan.This device adopts system negative pressure and liquid level equilibrium principle, can realize the continuous ash discharge of high negative pressure.Match centrifugal dust absorption fan.Technical characterstic is: dust suction process can ash discharge continuously, and plant maintenance amount is little, and fan delivery is large, can open multiple suction inlet work simultaneously.Shortcoming: dust collector efficiency is not high, outlet dust concentration is too high, and exhaust emissions exceeds standard, and has to exhaust emissions in boiler back end ductwork; Easily cause air leakage into flue duct, damage in impeller, blower negative pressure is low, suction is less.
Utility model content
In order to solve coal pulverizer dreg removing system design defect, during deslagging, pebble coal carries dust and discharges, and scene of causing situation of carrying out production strictly in line with rules and regulations is very poor, provides a kind of coal pulverizer negative pressure dust collector.
Technical scheme: comprise air preheater exhaust pass, it is characterized in that: add the aspiration of negative pressure mother pipe at air preheater exhaust pass, many bypass duct are divided after female pipe adding Hand-operated butterfly valve, dreg discharging box is accessed after bypass duct adding pneumatic knife gate valve, flushing line is added near female pipe Hand-operated butterfly valve place, flushing line is established manual flange door, dreg discharging box adds spray pipeline.
Beneficial effect: install the aspiration of negative pressure mother pipe additional at air preheater exhaust pass, by the dust in the negative pressure absorbing coal pulverizer dreg discharging box of air preheater outlet air preheater exhaust pass, the upper installation Hand-operated butterfly valve of female pipe is as the total door of Non-follow control of Negative Pressure Dust Collecting System, and during the female pipe of the aspiration of negative pressure runs, this total door is in normally open; Connect a road flushing line on the female pipe top of the aspiration of negative pressure, the dust stratification in the female pipe of periodic flushing negative pressure, dreg discharging box installs a set of spray pipeline additional, makes pebble coal keep moist, causes secondary pollution after avoiding pebble coal to discharge to environment.
Accompanying drawing illustrates:
Accompanying drawing 1 is the schematic front view of the present embodiment; Accompanying drawing 2 is that schematic diagram is looked on a left side for accompanying drawing 1.
Detailed description of the invention:
With reference to accompanying drawing 1,2, the present embodiment mainly comprises air preheater exhaust pass 6, the female pipe 5 of the aspiration of negative pressure is added at air preheater exhaust pass 6, five bypass duct are divided after female pipe 5 adding Hand-operated butterfly valve 7, dreg discharging box 2 is accessed after bypass duct adding pneumatic knife gate valve 4, add flushing line 9 near female pipe 5 Hand-operated butterfly valve 7 place, flushing line 9 is established manual flange door 8, dreg discharging box 2 adds spray pipeline 3.
The female pipe of a whole set of negative pressure dust collector adopts the seamless steel pipe of Ф 273, article 5, bypass duct is Ф 219 seamless steel pipe, air preheater exhaust pass is installed the Hand-operated butterfly valve of a DN250 as the total door of Negative Pressure Dust Collecting System, every bar bypass duct and dreg discharging box interface are positioned at dreg discharging box top, the pneumatic knife gate valve of a DN200 is installed on interface top, act as open and close Negative Pressure Dust Collecting System; Female pipe flushing pipe adopts Ф 65 seamless steel pipe, and pebble coal spray pipeline adopts Ф 32 seamless steel pipe.
Utilize blowing out chance, on air preheater export pipeline top, female pipe interface is installed, and manually total door is set, in unit operation situation, complete the installment work of the aspiration of negative pressure female pipeline, bye-pass suspension and support and parts, valve, finally complete pipeline joint work.
Claims (1)
1. coal pulverizer negative pressure dust collector, comprise air preheater exhaust pass, it is characterized in that: add the aspiration of negative pressure mother pipe at air preheater exhaust pass, many bypass duct are divided after female pipe adding Hand-operated butterfly valve, dreg discharging box is accessed after bypass duct adding pneumatic knife gate valve, add flushing line near female pipe Hand-operated butterfly valve place, flushing line is established manual flange door, dreg discharging box adds spray pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520137088.1U CN204503291U (en) | 2015-03-11 | 2015-03-11 | Coal pulverizer negative pressure dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520137088.1U CN204503291U (en) | 2015-03-11 | 2015-03-11 | Coal pulverizer negative pressure dust collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204503291U true CN204503291U (en) | 2015-07-29 |
Family
ID=53701294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520137088.1U Expired - Fee Related CN204503291U (en) | 2015-03-11 | 2015-03-11 | Coal pulverizer negative pressure dust collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204503291U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681260A (en) * | 2018-12-18 | 2019-04-26 | 上海冉月信息技术有限公司 | A kind of prominent coal dust cleaning plant of underground coal mine |
-
2015
- 2015-03-11 CN CN201520137088.1U patent/CN204503291U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681260A (en) * | 2018-12-18 | 2019-04-26 | 上海冉月信息技术有限公司 | A kind of prominent coal dust cleaning plant of underground coal mine |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20180311 |