CN202823052U - Filter-bag protecting device of bag filter - Google Patents

Filter-bag protecting device of bag filter Download PDF

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Publication number
CN202823052U
CN202823052U CN 201220561320 CN201220561320U CN202823052U CN 202823052 U CN202823052 U CN 202823052U CN 201220561320 CN201220561320 CN 201220561320 CN 201220561320 U CN201220561320 U CN 201220561320U CN 202823052 U CN202823052 U CN 202823052U
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CN
China
Prior art keywords
bag
filter
protective gas
assembly
emptying
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Withdrawn - After Issue
Application number
CN 201220561320
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Chinese (zh)
Inventor
宿玉华
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宿玉华
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Priority to CN201220532382 priority Critical
Priority to CN201220532382.9 priority
Application filed by 宿玉华 filed Critical 宿玉华
Priority to CN 201220561320 priority patent/CN202823052U/en
Application granted granted Critical
Publication of CN202823052U publication Critical patent/CN202823052U/en
Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model discloses a filter-bag protecting device of a bag filter, comprising an emptying and aerating unit and a protective gas sealing unit. The emptying and aerating unit comprises a first emptying and aerating component and a second emptying and aerating component. The first emptying and aerating component is used for completely exhausting the normal-pressure air in the space above the perforated plate in the box body of the bag filter and in the filter-bag and aerating the protective gas under pressure into the filter-bag. The second emptying and aerating component is used for completely exhausting the normal-pressure air in the space below the perforated plate in the box body of the bag filter and aerating the protective gas under pressure into the filter-bag. The protective gas sealing unit comprises an off-line valve component, an inlet air regulating valve component and a gate valve component which are used for sealing the protective gas in the box body of the bag filter. When the bag filter is out of operation, the filter-bag protecting device of a bag filter separates the filter-bag from air and utilizes the protective gas to protect the filter-bag from oxidation corrosion. Therefore, the service life of the filter-bag is prolonged and the operational cost of the bag filter is lowered.

Description

The bag-type duster filtering bag protective device
Technical field
The utility model relates to the coal-burning boiler technical field, especially relates to a kind of bag-type duster filtering bag protective device.
Background technology
Along with national requirements for environmental protection is more and more higher, the exhaust gas dust concentration discharge requires also more and more stricter, and this just makes the coal-fired boiler tail gas dedusting adopt the ratio of sack cleaner also in further raising.At present, newly-increased boiler dusting project is whole-colored employing sack cleaner almost, and original Electrostatic Precipitator of Coal-fired Boiler, water mill dust collector etc. are sack cleaner in technological transformation progressively also.
In the sack cleaner complete set of equipments, filter bag is the core work parts of sack cleaner, and its value is also very expensive, near 1/5th of a whole set of cleaner total value, and will carry out periodic replacement after operation a period of time.Because filter bag is worth expensive, if can prolong life of bag filter, just can reduces it and change number of times, and then greatly reduce the operating cost that sack cleaner uses producer.This also is many targets of using producer to do one's utmost to pursue.In the coal-burning boiler sack cleaner, filter bag substantially all is employing PPS fiber filtering, and the performances such as its temperature tolerance, antiacid, alkali resistance all belong to good, but its antioxygenic property is relatively poor.Be subjected to the restriction of this performance, if filter bag is in the higher environment of oxygen content for a long time, will be subject to serious oxide etch, the filter bag bulk strength is descended, cause life of bag filter significantly to shorten.
Present Domestic coal-burning boiler sack cleaner has two kinds of operation conditions basically: a kind of situation is for basically being in continuous running status, and overhaul the centre, the stoppage in transit equal time is also shorter, is mainly power plant, industrial power plant etc.; Another kind of situation for operation a period of time after, stop transport for a long time, idle time even reach some months, be mainly northern area heating boiler or enterprise's stand-by boiler sack cleaner.Under the first situation, filter bag can use 3-4 even longer time; And under the second situation, filter bag only uses the time about 2 years.The second situation is the reality that most sack cleaners use producer to face, and this is just perplexing deeply deduster and is using producer.
The following describes the reason of above-mentioned situation generation.In preamble, mentioned the used PPS filtrate of bag-type duster filtering bag, its non-oxidizability is relatively poor.Under the first running status, because boiler smoke character is relatively stable, and the oxygen content general control is being lower than about 5%, so although the filter bag working time is longer, life of bag filter is still longer.Under another kind of situation, sack cleaner will experience the long stoppage in transit phase, with regard to the heating boiler of northern area, and annual blowing out in March, until open stove November, furnace outage time reaches 7,8 months.In the meantime, sack cleaner does not rerun, and air enters in the dust collector box body, and namely filter bag is in the middle of the air ambient for a long time.The content of oxygen is near 21% in the air, and for the PPS filtrate, concentration is very high.Heating boiler furnace shutdown period simultaneously just in time also is northern China temperature the highest the time, because the top insulation is often ignored by deduster manufacturer, summer, lining bag dust collector internal temperature can reach 80-90 ℃.In the situation of above-mentioned high temperature and rich oxygen content, the oxide etch that the PPS filter bag is subject to is destructive, and also just greatly shorten its service life, so just needs to change filter bag, and then has increased the operating cost of sack cleaner use producer.
The utility model content
Technical problem to be solved in the utility model is: a kind of bag-type duster filtering bag protective device is provided; during sack cleaner is stopped transport; with filter bag and air insulated; and employing protective gas protection; make filter bag avoid oxide etch; thereby prolonged life of bag filter, reduced the operating cost of sack cleaner.
For solving the problems of the technologies described above, the technical solution of the utility model is: the bag-type duster filtering bag protective device, comprise emptying inflation unit and protective gas sealing unit, described emptying inflation unit comprises: be used for the above space of casing card of described sack cleaner and the atmospheric air in the described filter bag is discharged fully and protective gas with pressure is filled with the first emptying inflatable component in the filter bag; Be used for the atmospheric air in the following space of casing card of described sack cleaner discharged fully and protective gas with pressure is filled with the second emptying inflatable component in the filter bag; Described protective gas sealing unit comprises: for off-line valve module, air inlet adjustment valve module and the push-pull valve assembly in the casing that protective gas is sealed in sack cleaner.
Preferably, the described first emptying inflatable component comprise for the gas bag assembly of exhaust and be used for inflation the first protective gas pipeline assembly, the pipeline connection of described the first protective gas pipeline assembly and described gas bag assembly; The second protective gas pipeline assembly that the described second emptying inflatable component comprises for the air bubble assembly of exhaust and is used for inflating, the pipeline connection of described the second protective gas pipeline assembly and described air bubble assembly.
Preferably, the ash bucket of described push-pull valve assembly is provided with and reserves ash.
Preferably, described protective gas is inert gas.
Adopted technique scheme; the beneficial effects of the utility model are: because the bag-type duster filtering bag protective device comprises emptying inflation unit and protective gas sealing unit; at coal-burning boiler sack cleaner furnace shutdown period; utilize respectively gas bag assembly and air bubble assembly; to the inner winding-up of deduster protective gas with pressure; the high atmospheric air of oxygen content in the space, filter bag place is drained; simultaneously this space is full of protective gas; utilize the off-line valve; the ash bucket push-pull valve; the air inlet adjustment valve is isolated protective gas and ambient air fully; make filter bag avoid oxide etch at furnace shutdown period; be effectively protected; thereby prolonged life of bag filter, reduced the operating cost of sack cleaner.
Off-line valve module, air inlet adjustment valve module, push-pull valve assembly, gas bag assembly and air bubble assembly are original parts of sack cleaner; the utility model has fully been used original these the several parts of sack cleaner; their use functions when sack cleaner normally moves have been changed; make it in new protective device, play new effect; thereby accomplish to save investment, increased practicality of the present utility model.
Reserve ash because the ash bucket of push-pull valve assembly is provided with, need not increase the sealing that parts can improve this protective device.
Because protective gas is nitrogen, the density of nitrogen and air approaches, nitrogen and air interpenetrate exchange capacity a little less than, and the stability of nitrogen is high, the sustainable some months of its effective timeliness.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the structure enlarged drawing at I place among Fig. 1;
Fig. 3 be among Fig. 2 A to structural representation;
Fig. 4 is the structure enlarged drawing at II place among Fig. 1;
Wherein: 1, off-line valve module; 2, air inlet adjustment valve module; 3, push-pull valve assembly; 4, gas bag assembly; 5, air bubble assembly; 6, casing; 7, card; 8, filter bag; 9, the first protective gas pipeline assembly; 10, the second protective gas pipeline assembly; 11, injection tube.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4 are common; the utility model has fully been used the original off-line valve module 1 of sack cleaner, air inlet adjustment valve module 2, push-pull valve assembly 3, gas bag assembly 4 and air bubble assembly 5; but the utility model has changed their use functions when sack cleaner normally moves; make it in new protective device, play new effect; thereby accomplish to save investment; having increased practicality of the present utility model, below is concrete scheme of the present utility model:
The bag-type duster filtering bag protective device comprises emptying inflation unit and protective gas sealing unit.
Wherein, emptying inflation unit comprises: be used for casing 6 cards, the 7 above spaces of sack cleaner and the atmospheric airs in the filter bag 8 are discharged fully and protective gas with pressure is poured the first interior emptying inflatable component of filter bag 8, the first emptying inflatable component comprise for the gas bag assembly 4 of exhaust and be used for inflation the pipeline connection of the first protective gas pipeline assembly 9, the first protective gas pipeline assemblies 9 and gas bag assembly 4; Be used for the air in the casing 6 cards 7 following spaces of sack cleaner discharged fully and protective gas is poured the second interior emptying inflatable component of filter bag 8; the second emptying inflatable component comprises for the air bubble assembly 5 of exhaust and is used for the second protective gas pipeline assembly 10, the second protective gas pipeline assemblies 10 of inflation and the pipeline connection of air bubble assembly 5.
Wherein, the protective gas sealing unit comprises: for off-line valve module 1, air inlet adjustment valve module 2 and push-pull valve assembly 3 in the casing 6 that protective gas is sealed in sack cleaner, off-line valve module 1, air inlet adjustment valve module 2 and push-pull valve assembly 3 are the original structure of sack cleaner.
In order to obtain better more lasting protection effect, the ash bucket of push-pull valve assembly 3 is provided with reserves ash, thereby need not increase the sealing that parts can improve this protective device.
In the present embodiment, protective gas is nitrogen, and the density of nitrogen and air approaches, nitrogen and air interpenetrate exchange capacity a little less than, and the stability of nitrogen is high, the sustainable some months of its effective timeliness.Can certainly adopt other inert gases to serve as protective gas of the present utility model.
In order better to understand the utility model, the below carries out further detailed explaining to off-line valve module 1, air inlet adjustment valve module 2, push-pull valve assembly 3, gas bag assembly 4 and air bubble assembly 5, and the gas bag assembly comprises: gas bag, electromagnetic impulse valve, injection tube 11; The off-line valve module comprises: cylinder, valve plate, valve seat and sealing ring; The air inlet adjustment valve module comprises: valve body, valve plate and rotating shaft; The air bubble assembly comprises: electromagnetic impulse valve, gas bag and jet pipe; The push-pull valve assembly comprises: valve plate, valve seat and valve rod; Because the detailed construction of above-mentioned five groups of assemblies is parts well known to those of ordinary skill in the art, therefore do not mark in the drawings.
Operation principle of the present utility model is as follows:
At coal-burning boiler sack cleaner furnace shutdown period; utilize respectively gas bag assembly 4 and air bubble assembly 5; to casing 6 inner nitrogen-blows; the high air of oxygen content in the space, filter bag 8 place is drained; simultaneously this space is full of nitrogen; utilize off-line valve module 1, air inlet adjustment valve module 2 and push-pull valve assembly 3 that nitrogen and ambient air are isolated fully; make filter bag 8 avoid oxide etch at furnace shutdown period; be effectively protected; thereby prolonged the service life of filter bag 8, reduced the operating cost of sack cleaner.
The course of work of bag-type duster filtering bag protective device of the present utility model is as follows:
1; open the off-line valve (not marking among the figure) of off-line valve module 1; close the compressed air line valve (not marking among the figure) of gas bag assembly 4; connect the first protective gas pipeline assembly 9 valves; make nitrogen enter gas bag; open successively the electromagnetic impulse valve (not marking among the figure) in the gas bag assembly 4; injection tube 11 nozzles of nitrogen through gas bag assembly 4 are sprayed in the filter bag 8; because the nitrogen that sprays into has larger pressure; nitrogen can be with the air extrusion in the filter bag 8 out; repeatedly several times after; the air that the sack cleaner card reaches in the filter bag 8 more than 7 can be discharged fully; filter bag 8 inside also just are in the protection of nitrogen fully; then close the off-line valve, prevent that air from reentering this space.
2, open the air inlet adjustment valve (not marking among the figure) of air inlet adjustment valve module 2; close the compressed air line valve (not marking among the figure) of air bubble assembly 5; connect the second protective gas pipeline assembly 10 valves; make nitrogen enter air bubble; open the electromagnetic impulse valve (not marking among the figure) of air bubble assembly 5; in the space that the casing 6 that nitrogen is sprayed into sack cleaner and ash bucket (not marking among the figure) surround; because the nitrogen that sprays into has larger pressure, nitrogen can be discharged the air in this space from the extruding of air inlet adjustment valve.Repeatedly several times after, the air in sack cleaner card 7 following spaces can be discharged fully, filter bag 8 outsides also are in the protection of inert nitrogen gas fully, then the air inlet adjustment valve cuts out, prevent that air from reentering this space.
3, through behind the some months, can adopt the same method of step S1 and S2, to suitably replenishing nitrogen in the above-mentioned space, to guarantee the purity of nitrogen in the space.
Wherein, step 3 is not the necessary step of the utility model, because the density of nitrogen greater than air, even therefore valve body has a small amount of leakage, can not make too much air enter in the seal cavity yet.
In sum, during sack cleaner is stopped transport, filter bag 8 and air are effectively isolated, and adopt the protective gas protection, make filter bag 8 avoid oxide etch, thereby prolonged 8 service lifes of filter bag, reduced the operating cost of sack cleaner.
Inventor of the present utility model has done deep research to bag dust collector in the environmental protection industry (epi) working for many years, on this basis, adds experience accumulation for many years, and design draws this technical scheme.The utility model can prolong the service life of filter bag greatly, for enterprise, the fund of saving will be huge, for instance, the medium small boiler bagging deduster of a 130t/h, the every prolongation of life of bag filter 1 year, can economize on the use of funds about 150,000 yuan, according to the recoverable amount of present domestic coal-burning boiler, the whole nation can save several hundred million every year, even tens00000000 fund.Therefore, the utility model will be huge to the contribution of each relevant enterprise, administer significant for the environmental protection industry (epi) atmosphere.
The utility model is not limited to above-mentioned concrete embodiment, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within the protection domain of the present utility model.

Claims (4)

1. the bag-type duster filtering bag protective device is characterized in that, comprises emptying inflation unit and protective gas sealing unit, and described emptying inflation unit comprises:
Be used for the above space of casing card of described sack cleaner and the atmospheric air in the described filter bag is discharged fully and protective gas with pressure is filled with the first emptying inflatable component in the filter bag;
Be used for the atmospheric air in the following space of casing card of described sack cleaner discharged fully and protective gas with pressure is filled with the second emptying inflatable component in the filter bag;
Described protective gas sealing unit comprises:
For off-line valve module, air inlet adjustment valve module and the push-pull valve assembly in the casing that protective gas is sealed in sack cleaner.
2. bag-type duster filtering bag protective device as claimed in claim 1, it is characterized in that, the described first emptying inflatable component comprise for the gas bag assembly of exhaust and be used for inflation the first protective gas pipeline assembly, the pipeline connection of described the first protective gas pipeline assembly and described gas bag assembly; The second protective gas pipeline assembly that the described second emptying inflatable component comprises for the air bubble assembly of exhaust and is used for inflating, the pipeline connection of described the second protective gas pipeline assembly and described air bubble assembly.
3. bag-type duster filtering bag protective device as claimed in claim 2 is characterized in that, the ash bucket of described push-pull valve assembly is provided with reserves ash.
4. bag-type duster filtering bag protective device as claimed in claim 3 is characterized in that, described protective gas is inert gas.
CN 201220561320 2012-10-17 2012-10-29 Filter-bag protecting device of bag filter Withdrawn - After Issue CN202823052U (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201220532382 2012-10-17
CN201220532382.9 2012-10-17
CN 201220561320 CN202823052U (en) 2012-10-17 2012-10-29 Filter-bag protecting device of bag filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220561320 CN202823052U (en) 2012-10-17 2012-10-29 Filter-bag protecting device of bag filter

Publications (1)

Publication Number Publication Date
CN202823052U true CN202823052U (en) 2013-03-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220561320 Withdrawn - After Issue CN202823052U (en) 2012-10-17 2012-10-29 Filter-bag protecting device of bag filter

Country Status (1)

Country Link
CN (1) CN202823052U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102886182A (en) * 2012-10-17 2013-01-23 宿玉华 Protection device and protection method for filter bag of bag-type dust remover
CN104399332A (en) * 2014-11-21 2015-03-11 苏州宇洋环保设备制造有限公司 Air inlet pipe of cloth bag dust collector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102886182A (en) * 2012-10-17 2013-01-23 宿玉华 Protection device and protection method for filter bag of bag-type dust remover
CN104399332A (en) * 2014-11-21 2015-03-11 苏州宇洋环保设备制造有限公司 Air inlet pipe of cloth bag dust collector
CN104399332B (en) * 2014-11-21 2016-08-24 苏州宇洋环保设备制造有限公司 Sack cleaner blast pipe

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C14 Grant of patent or utility model
GR01 Patent grant
RGAV Abandon patent right to avoid regrant
AV01 Patent right actively abandoned

Granted publication date: 20130327

Effective date of abandoning: 20140521