CN201572582U - Instant dust blowing and removing device for branch chamber back-blowing bag type dust collector - Google Patents
Instant dust blowing and removing device for branch chamber back-blowing bag type dust collector Download PDFInfo
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- CN201572582U CN201572582U CN2009202463229U CN200920246322U CN201572582U CN 201572582 U CN201572582 U CN 201572582U CN 2009202463229 U CN2009202463229 U CN 2009202463229U CN 200920246322 U CN200920246322 U CN 200920246322U CN 201572582 U CN201572582 U CN 201572582U
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- blowback wind
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Abstract
The utility model provides an instant dust blowing and removing device for a branch chamber back-blowing bag type dust collector, which comprises a main air back-blowing pipe, an instant blowing valve and a plurality of bidirectional veneer ventilation valves. The main air back-blowing pipe is arranged at the position of a middle channel of the branch chamber back-blowing bag type dust collector, and a plurality of branch dust-filtering chambers are distributed at the two sides of the main air back-blowing pipe; the bidirectional veneer ventilation valves are respectively and correspondingly installed with the branch dust-filtering chambers one by one; the instant blowing valve which is arranged at one end of the main air back-blowing pipe is used for controlling the opening or closing of a valve between the main air back-blowing pipe and a back-blowing air source channel; the bidirectional veneer ventilation valves are three-way valves; and a valve plate which is connected with an air cylinder by a connecting mechanism is driven by the connecting mechanism to bear the driving control of the air cylinder. The instant dust blowing and removing device can realize the switching of the bag type dust collector between the filtering state and the dust removing state by utilizing a simple structure. Moreover, due to the design of the instant blowing valve, back-blowing air of the dust removing device has certain knocking effect, thereby leading to better dust removing capability.
Description
Technical field
The utility model relates to a kind of deashing device that is used for sack cleaner, particularly a kind of wink blowing-out apparatus for ash that is applied on the outside filtering type locellus sack cleaner, this deashing device is realized the pinking anti-blow cleaning dust by simple structure, has obtained better ash-removal effect.The utility model also relates to the dust cleaning control method of this deashing device, belongs to the bag type dust removing technology field.
Background technology
In the bag type dust removing technology, the deashing of filter bag is most important and link most critical, also is the most important characteristics of distinguishing the bag type dust removing technology route.The widest exterior sieve type bag-type removing dust and clearing ash technology of practical application mainly is divided into two big classes at present: a class is the pulse jetting deashing technology that contains the pulse valve device that belongs to powerful deashing, and another kind of is the chamber-dividing counter-blowing wind ash-clearing technology that does not contain the pulse valve device that belongs to weak power deashing.
At a kind of chamber-dividing counter-blowing wind ash-clearing technology in back, according to disclosed technical data and existing practical engineering application, present chamber-dividing counter-blowing ash-clearing technology has many defectives.For example the patent No. is to disclose a kind of ash-clearing technology in the patent " exterior sieve type bag-type dust remover and ash removal method thereof " of ZL200710128409.1.This deashing device is driven lever body, is opened or close the ash-clearing technology of clean exhanst gas outlet valve of corresponding locellus and blowback air valve by ring chain or screw mandrel.This device transmission mechanism complexity, and when moving in the high-temperature flue gas that is in about 150 ℃, insufficient lubrication, each parts transmission poor fit cause its actual application and trouble rate higher.In addition, the structure of clean exhanst gas outlet valve of its locellus and blowback air valve is the butterfly valve that valve plate rotates around central shaft, and valve plate is that rigidity cooperates with shell, its sealing is poor, and does not have positioner, rotates voluntarily easily, cause the leakage of blowback wind, thereby cause influencing ash-removal effect.
The patent No. is to disclose a kind of like this ash-clearing technology in the patent " the rotary counter-blowing mechanism of blowback sack cleaner " of ZL200720115698.7 for another example.This device drives reverse-blow pipe by reducing gear and moves in a circle, docks reverse gas cleaning with the pipeline of drawing and do circumference from each chamber.This technical disadvantages is that the pipeline construction amount is big, and reverse-blow pipe rotating mechanism complexity has increased the length of the clean exhanst gas outlet pipeline of locellus simultaneously, and the gas outlet bore also is restricted, and this means has increased the deduster SR.Adjustable floating interface of while has the slit when docking with the pipeline that draw each chamber, causes blowback wind to leak, and influences the reverse gas cleaning effect.
More than two kinds of chamber-dividing counter-blowing wind ash-clearing technologies also have the shortcoming of a common ground.The blowback wind that is used for filter bag ash removal in this class technology that Here it is is a kind of pressure stability, lasting blowback air-flow, and the deashing air-flow of its steady flow is relatively poor to the ash-removal effect of filter bag.Therefore, the chamber-dividing counter-blowing bag type dust removing technology need a kind of simple in structure, leakages is little, fault rate is low, the deashing ability is stronger, and can the reverse gas cleaning mechanism that move steady in a long-term, for the safe and stable operation of whole deduster is given security.
The art of this patent is designed based on above-mentioned purpose.
The utility model content
Main purpose of the present utility model is to solve problems of the prior art, a kind of wink blowing-out apparatus for ash that is applied on the outside filtering type locellus sack cleaner is provided, this deashing device is simple in structure, leakage is little, fault rate is low, the deashing ability is stronger, also energy operation steady in a long-term, for the safe and stable operation of whole deduster is given security.
Another purpose of the present utility model be to provide a kind of application should wink the blowing-out apparatus for ash carry out the control method that deashing is handled.
The purpose of this utility model is achieved by following technical proposals:
A kind of chamber-dividing counter-blowing sack cleaner is characterized in that: comprise and blow valve and several single plate bidirectional scavenging air valves in blowback wind house steward, wink with wink blowing-out apparatus for ash; This blowback wind house steward is arranged on the center-aisle place of this chamber-dividing counter-blowing sack cleaner, and its both sides are furnished with some filter dirt locellus; Described each single plate bidirectional scavenging air valve is filtered the corresponding one by one installation of dirt locellus with each respectively; Blow the end that valve is arranged on blowback wind house steward this wink, in order to control the valve open between blowback wind house steward and the blowback general mood source channels or to close;
Described single plate bidirectional scavenging air valve is a three-way valve; Each single plate bidirectional scavenging air valve is made of scavenging air valve housing, cylinder, linkage and valve plate respectively; On this scavenging air valve housing, offer blowback wind inlet, pure qi (oxygen) outlet and locellus connected entrance respectively, respectively in order to be communicated with described blowback wind house steward, air-purifying chamber and filter dirt locellus; This valve plate is connected with cylinder by bindiny mechanism, and controlled by the driving of cylinder.
Described blowback wind inlet is opened on blowback wind house steward's the sidewall;
This linkage comprises mobile jib, secondary bar and rotating shaft; This mobile jib is fixedlyed connected with cylinder; This pair bar is connected with the valve plate movable axis; Adopt movable axis to be connected between mobile jib and the secondary bar; This rotating shaft is arranged between pure qi (oxygen) outlet and the blowback wind inlet; One end and this rotating shaft of valve plate are coupling, and make this valve plate rotate along this rotating shaft.
Described blowback wind inlet be opened in blowback wind house steward top or following on; The corresponding setting of described pure qi (oxygen) outlet with the blowback wind inlet;
This linkage is made of a mobile jib; This mobile jib is fixedlyed connected with valve plate with cylinder respectively; This valve plate is implemented between pure qi (oxygen) outlet and the blowback wind inlet by moving up and down of mobile jib and switches.
On blowback wind house steward's sidewall, also offer blowback air intake butterfly valve.
Blow valve described wink and comprise cylinder, connecting rod and sealing valve plate; This connecting rod is fixedlyed connected with valve plate with cylinder respectively; This cylinder drives the sealing valve plate by connecting rod, to realize the switch control to the valve between blowback wind house steward and the blowback wind passage.
Blow valve described wink and adopt pulse valve.
Also have additional the pure qi (oxygen) outlet(discharge) flange in described pure qi (oxygen) exit; The place also has additional blowback wind inlet flange at described blowback wind inlet; At described pure qi (oxygen) outlet(discharge) flange and blowback wind inlet flange, be provided with sealing joint strip with the cohesive position of valve plate.
On the connecting rod of described linkage, be provided with spacing support, play position-limiting action with linkage.
The beneficial effects of the utility model are: this in wink the blowing-out apparatus for ash realize that by a kind of simple structure sack cleaner switches between filtration state and deashing state.And, make the blowback wind of this deashing device have certain pinking effect by the design of being blown valve wink, thereby have better deashing ability.Its wink blow valve and also can adopt the pulse valve approved product, simultaneously, the cylinder in this device can adopt the control of PLC microprocessor, can adjust the time of anti-blow cleaning dust easily.
Description of drawings
Fig. 1 is a wink blowing-out apparatus for ash overall structure schematic diagram;
Fig. 2 is the wink blowing-out apparatus for ash first example structure schematic diagram;
Fig. 3 is the wink blowing-out apparatus for ash second example structure schematic diagram;
Fig. 4 is wink blowing-out apparatus for ash the 3rd an example structure schematic diagram;
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is this chamber-dividing counter-blowing sack cleaner wink blowing-out apparatus for ash overall structure schematic diagram.This chamber-dividing counter-blowing sack cleaner with wink the blowing-out apparatus for ash comprise: blow valve 3 and several single plate bidirectional scavenging air valves 1 in blowback wind house steward 2, wink.This blowback wind house steward 2 is arranged on the center-aisle place of this chamber-dividing counter-blowing sack cleaner, and its both sides are furnished with some filter dirt locellus.Described each single plate bidirectional scavenging air valve 1 is filtered the corresponding one by one installation of dirt locellus with each respectively.Blow the end that valve 3 is arranged on blowback wind house steward 2 this wink, in order to control the valve open between blowback wind house steward 2 and the blowback general mood source channels or to close.This blowback general mood source channels is pressed blowback wind in order to conveyer belt in blowback wind house steward.
Fig. 2 is this chamber-dividing counter-blowing sack cleaner wink blowing-out apparatus for ash first example structure schematic diagram.Referring to Fig. 2, described single plate bidirectional scavenging air valve 1 is a three-way valve.Each single plate bidirectional scavenging air valve 1 is made of scavenging air valve housing, cylinder 4, linkage and valve plate 9 respectively.On this scavenging air valve housing, offer blowback wind inlet, pure qi (oxygen) outlet and locellus connected entrance respectively, respectively in order to be communicated with blowback wind house steward 2, air-purifying chamber and filter dirt locellus.This valve plate 9 is connected with cylinder 4 by bindiny mechanism, and controlled by the driving of cylinder 4, with the connection of switching outlet of described pure qi (oxygen) and blowback wind inlet or close.
Should be understood that, as shown in Figure 2, this patent is between valve plate 9 and pure qi (oxygen) outlet, and the valve mechanism between valve plate 9 and the blowback wind inlet designs, be not to have adopted traditional central shaft rotary type butterfly valve design, but adopted the design of presser type shutoff valve.This valve mechanism wants better than traditional valve design sealing.As shown in the figure, in order further to increase the sealing between valve plate 9 and each connected entrance, this patent also is provided with pure qi (oxygen) outlet(discharge) flange 7 in described pure qi (oxygen) exit, and the place is provided with blowback wind inlet flange 10 at described blowback wind inlet.And, also be provided with sealing joint strip with the cohesive position of valve plate 9 at pure qi (oxygen) outlet(discharge) flange 7, blowback wind inlet flange 10.So just can further guarantee the sealing between valve plate 9 and each connected entrance.By said structure design, guaranteed the sealing between valve plate and each connected entrance in the designed deashing device of this patent, make blowback wind slip reduce greatly, this helps improving the efficient of reverse gas cleaning.
In addition, as shown in the figure, in order to keep the stability of linkage when moving, this patent also can be provided with spacing support 6 on the connecting rod of linkage, to play the position limitation protection effect of linkage.
As shown in the figure, to blow valve 3 designed wink of this patent be by a cylinder drivening rod and then drive a sealing valve plate realizes the valve between blowback wind house steward 2 and the blowback general mood source channels is carried out the purpose that switch is controlled.The characteristics of blowing valve 3 this wink are that moment opens fast and close at a slow speed, be that valve is need open the time, the rapid drivening rod pulling of cylinder valve plate Open valve, press blowback wind so that discharge rapidly in the blowback wind house steward 2 and charge into band, thereby at first form the pinking ash-removal effect, then, blowback general mood source channels at the uniform velocity charges into blowback general mood stream in blowback wind house steward 2, filter bag is carried out deashing once more, and promptly the deashing process of filter bag is to shake the stack of trembling with two kinds of effects of blowback; When blowing valve 3 wink and need close, cylinder drive valve plate is again closed slowly.Opening the benefit of closing slowly so soon is, band presses the moment dilatation of blowback general mood stream to produce a kind of pinking power, to having a kind of shake to tremble effect attached to the dust on the filter bag, makes attached to the dust on the filter bag and peels off easily and come off, the stream of blowback general mood then continues to be blown into again, and dust is separated with filter cloth.Such processing method can obtain better ash-removal effect than existing chamber-dividing counter-blowing wind ash-clearing technology.
Certainly, be not limited in said structure in order to the valve mechanism that forms above-mentioned pinking effect.Blow valve 3 this wink and can also directly use existing mature approved product pulse valve device.This pulse valve device can directly discharge compressed air in blowback wind house steward 2, thereby forms the effect of pinking deashing.
The chamber-dividing counter-blowing sack cleaner of said structure wink blowing-out apparatus for ash, when deduster was in the normal filtration state: all single plate bidirectional scavenging air valves 1 all were in the filtration state, be valve plate 9 under the effect of cylinder 4 with blowback wind inlet sealing, make the clean flue gas behind the locellus inner filtration directly enter air-purifying chamber.Under this normal filtration state, blow valve 3 wink and be in closed condition, blowback wind can not enter blowback wind house steward 2.
When deduster was in the deashing state, single plate bidirectional scavenging air valve 1 was switched one by one to the deashing state, and promptly with pure qi (oxygen) outlet sealing, the wind inlet of blowback simultaneously is opened valve plate 9 under the effect of cylinder 4, made blowback wind inlet and filter dirt locellus be in connected state.At this moment, do not open as yet, so filter dirt divides indoor filter bag temporarily to be in the intermediateness of the non-deashing of non-filtration owing to blow valve 3 wink.Subsequently, blow in wink valve 3 under the effect of cylinder rapidly moment open, divide indoorly from the blowback general mood stream moment dilatation of blowback general mood source channels and the filter dirt that enters the state of mediating, filter bag is carried out deashing.
As previously mentioned, band presses the moment dilatation of blowback general mood stream to enter filter dirt to divide indoor generation a kind of pinking power, to having a kind of shake to tremble effect attached to the dust on the filter bag, makes attached to the dust on the filter bag and peels off easily and come off, the stream of blowback general mood then continues to be blown into again, and dust is separated with filter cloth.After through the time of setting, the single plate bidirectional scavenging air valve 1 of this chamber switches to the normal filtration state, blows valve 3 wink simultaneously and also closes, and switches to next filter dirt locellus then and carries out deashing, and deashing process repeats above process, finishes until whole deduster deashing.
As seen, the designed wink blowing-out apparatus for ash of this patent realizes that by a kind of simple structure sack cleaner switches between filtration state and deashing state.And, make the band of this deashing device press blowback wind to have certain pinking effect by the design of being blown valve wink, thereby have better deashing ability.This apparatus structure is simple, construction volume is little, helps reducing construction costs.
In addition, the linkage in the described single plate bidirectional scavenging air valve 1 is a mechanical transmission mechanism, in order to transmit the driving control action to valve plate 9.In practice of construction, can multiple different structural design be arranged to this linkage according to concrete execution conditions difference.Below we in conjunction with Fig. 2 to Fig. 4, three kinds of linkage possible implementation are provided:
Embodiment one:
As shown in Figure 2, described blowback wind inlet is opened on blowback wind house steward 2 the sidewall.This linkage comprises mobile jib 5, secondary bar 8 and rotating shaft 11.This mobile jib 5 is fixedlyed connected with cylinder 4.This pair bar 8 is connected with valve plate 9 movable axis.Adopt movable axis to be connected between mobile jib 5 and the secondary bar 8.This rotating shaft 11 is arranged between pure qi (oxygen) outlet and the blowback wind inlet.One end and this rotating shaft 11 of valve plate 9 are coupling, and make this valve plate 9 to rotate along this rotating shaft 11, switch to pure qi (oxygen) outlet or blowback wind inlet.
The designed linkage of present embodiment is to promote secondary bar 8 by moving up and down of mobile jib 5, and then drive valve plate 9 and rotate along rotating shaft 11, realizes the change action of valve plate 9 between pure qi (oxygen) outlet and blowback wind inlet.This embodiment is the designed deashing device of a this patent typical embodiment the most, is suitable for the application of grassroot project.
Embodiment two:
As shown in Figure 3, described blowback wind inlet be opened in blowback wind house steward 2 top or following on.The corresponding setting of described pure qi (oxygen) outlet with the blowback wind inlet.This linkage only is made of a mobile jib 5 and gets final product.This mobile jib 5 is fixedlyed connected with valve plate 9 with cylinder 4 respectively.This valve plate 9 is implemented between pure qi (oxygen) outlet and the blowback wind inlet by moving up and down of mobile jib 5 and switches.
This embodiment is suitable for having the project of implementation condition, and promptly this blowback wind house steward 2 has enough width and the blowback wind inlet is set below can be thereon.The benefit of this scheme implementation is more to simplify on the one hand the structure of this deashing device, makes the construction costs of this device further reduce; Be convenient to the staff on the other hand filter bag is overhauled, promptly not needing to remove devices such as connecting rod, valve can overhaul filter bag.
Embodiment three:
As shown in Figure 4, the structure of the structure of present embodiment and previous embodiment one is basic identical, just also offers blowback air intake butterfly valve 12 on blowback wind house steward 2 sidewall.The effect of this blowback air intake butterfly valve 12 is to close and opens blowback wind.This embodiment mainly is at the project of transforming, but under the basis of the blowback air intake butterfly valve 12 of not removing original equipment the designed deashing device of improvement cost patent still.
In sum, this patent has designed a kind of wink blowing-out apparatus for ash that is applied on the outside filtering type locellus sack cleaner, this in wink the blowing-out apparatus for ash realize that by a kind of simple structure sack cleaner switches between filtration state and deashing state.And, make the blowback wind of this deashing device have certain pinking effect by the design of being blown valve wink, thereby have better deashing ability.Any not creative transformation that those skilled in the art are done under this design philosophy all should be considered as within protection domain of the present utility model.
Claims (8)
1. a chamber-dividing counter-blowing sack cleaner is characterized in that: comprise and blow valve and several single plate bidirectional scavenging air valves in blowback wind house steward, wink with wink blowing-out apparatus for ash; This blowback wind house steward is arranged on the center-aisle place of this chamber-dividing counter-blowing sack cleaner, and its both sides are furnished with some filter dirt locellus; Described each single plate bidirectional scavenging air valve is filtered the corresponding one by one installation of dirt locellus with each respectively; Blow the end that valve is arranged on blowback wind house steward this wink, in order to control the valve open between blowback wind house steward and the blowback general mood source channels or to close;
Described single plate bidirectional scavenging air valve is a three-way valve; Each single plate bidirectional scavenging air valve is made of scavenging air valve housing, cylinder, linkage and valve plate respectively; On this scavenging air valve housing, offer blowback wind inlet, pure qi (oxygen) outlet and locellus connected entrance respectively, respectively in order to be communicated with described blowback wind house steward, air-purifying chamber and filter dirt locellus; This valve plate is connected with cylinder by bindiny mechanism, and controlled by the driving of cylinder.
2. chamber-dividing counter-blowing sack cleaner as claimed in claim 1 wink blowing-out apparatus for ash, it is characterized in that: described blowback wind inlet is opened on blowback wind house steward's the sidewall;
This linkage comprises mobile jib, secondary bar and rotating shaft; This mobile jib is fixedlyed connected with cylinder; This pair bar is connected with the valve plate movable axis; Adopt movable axis to be connected between mobile jib and the secondary bar; This rotating shaft is arranged between pure qi (oxygen) outlet and the blowback wind inlet; One end and this rotating shaft of valve plate are coupling, and make this valve plate rotate along this rotating shaft.
3. chamber-dividing counter-blowing sack cleaner as claimed in claim 1 is characterized in that with wink blowing-out apparatus for ash: described blowback wind inlet be opened in blowback wind house steward top or following on; The corresponding setting of described pure qi (oxygen) outlet with the blowback wind inlet;
This linkage is made of a mobile jib; This mobile jib is fixedlyed connected with valve plate with cylinder respectively; This valve plate is implemented between pure qi (oxygen) outlet and the blowback wind inlet by moving up and down of mobile jib and switches.
4. chamber-dividing counter-blowing sack cleaner as claimed in claim 2 is characterized in that: also offer blowback air intake butterfly valve on blowback wind house steward's sidewall with wink blowing-out apparatus for ash.
5. chamber-dividing counter-blowing sack cleaner as claimed in claim 1 is characterized in that: blow valve described wink and comprise cylinder, connecting rod and sealing valve plate with wink blowing-out apparatus for ash; This connecting rod is fixedlyed connected with valve plate with cylinder respectively; This cylinder drives the sealing valve plate by connecting rod, to realize the switch control to the valve between blowback wind house steward and the blowback wind passage.
6. chamber-dividing counter-blowing sack cleaner as claimed in claim 1 is characterized in that: blow valve described wink and adopt pulse valve with wink blowing-out apparatus for ash.
7. it is characterized in that: also have additional the pure qi (oxygen) outlet(discharge) flange with wink blowing-out apparatus for ash as arbitrary described chamber-dividing counter-blowing sack cleaner in the claim 1 to 4 in described pure qi (oxygen) exit; The place also has additional blowback wind inlet flange at described blowback wind inlet; At described pure qi (oxygen) outlet(discharge) flange and blowback wind inlet flange, be provided with sealing joint strip with the cohesive position of valve plate.
8. chamber-dividing counter-blowing sack cleaner as claimed in claim 1 is characterized in that: be provided with spacing support on the connecting rod of described linkage, play position-limiting action with linkage with wink blowing-out apparatus for ash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202463229U CN201572582U (en) | 2009-09-29 | 2009-09-29 | Instant dust blowing and removing device for branch chamber back-blowing bag type dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202463229U CN201572582U (en) | 2009-09-29 | 2009-09-29 | Instant dust blowing and removing device for branch chamber back-blowing bag type dust collector |
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| Publication Number | Publication Date |
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| CN201572582U true CN201572582U (en) | 2010-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202463229U Expired - Lifetime CN201572582U (en) | 2009-09-29 | 2009-09-29 | Instant dust blowing and removing device for branch chamber back-blowing bag type dust collector |
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| CN (1) | CN201572582U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101785945B (en) * | 2009-09-29 | 2012-05-30 | 达华集团北京中达联咨询有限公司 | Instantaneous-blowing deashing unit and control method thereof for chamber blowback bag filter |
| CN106964491A (en) * | 2017-04-08 | 2017-07-21 | 安徽盛运重工机械有限责任公司 | Electrostatic dust collector capable of automatically cleaning dust |
| WO2019062545A1 (en) * | 2017-09-27 | 2019-04-04 | 北京博电兴源节能科技有限公司 | Outside-filtering bag-type dust remover |
| CN110694363A (en) * | 2019-10-22 | 2020-01-17 | 南陵县红宝种业有限公司 | Energy-saving pulse dust collecting chamber |
-
2009
- 2009-09-29 CN CN2009202463229U patent/CN201572582U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101785945B (en) * | 2009-09-29 | 2012-05-30 | 达华集团北京中达联咨询有限公司 | Instantaneous-blowing deashing unit and control method thereof for chamber blowback bag filter |
| CN106964491A (en) * | 2017-04-08 | 2017-07-21 | 安徽盛运重工机械有限责任公司 | Electrostatic dust collector capable of automatically cleaning dust |
| WO2019062545A1 (en) * | 2017-09-27 | 2019-04-04 | 北京博电兴源节能科技有限公司 | Outside-filtering bag-type dust remover |
| CN110694363A (en) * | 2019-10-22 | 2020-01-17 | 南陵县红宝种业有限公司 | Energy-saving pulse dust collecting chamber |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100908 Effective date of abandoning: 20090929 |