CN102847389A - Static interceptor used in glass furnace flue gas denitration - Google Patents

Static interceptor used in glass furnace flue gas denitration Download PDF

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Publication number
CN102847389A
CN102847389A CN2012102038536A CN201210203853A CN102847389A CN 102847389 A CN102847389 A CN 102847389A CN 2012102038536 A CN2012102038536 A CN 2012102038536A CN 201210203853 A CN201210203853 A CN 201210203853A CN 102847389 A CN102847389 A CN 102847389A
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China
Prior art keywords
box
blocker
static
glass furnace
denitration
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CN2012102038536A
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CN102847389B (en
Inventor
宋正兴
沈卫东
陈砚雄
施大成
刘立平
顾亚萍
宋丽娜
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JIANGSU YIJIN ENVIRONMENTAL PROTECTION EQUIPMENT ENGINEERING CO., LTD.
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Jiangsu Yijin Environmental Protection Technology Co ltd
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Priority to CN201210203853.6A priority Critical patent/CN102847389B/en
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Abstract

The invention discloses a static interceptor used in glass furnace flue gas denitration. The static interceptor comprises an interceptor box, interceptors, a suspending apparatus, bi-directional spiral gate valves, ash hoppers, ash discharge valves, and maintenance gates. The interceptor box comprises an upper box and a lower box arranged on a tower frame and connected together. The interceptors are arranged in the middle of the upper box and the lower box. A flue gas inlet and a flue gas outlet are arranged in the lower box and on two sides of the interceptors. The suspending apparatus connected with the interceptors is arranged on the upper end of the interceptor. A scraper is arranged on one side of the interceptor. The scraper is connected with the inner wall of the lower box. The bi-directional spiral gate valves are arranged on the lower end of the lower box on a position corresponding to the interceptors. The ash hoppers and the ash discharge valves are arranged on the lower ends of the bi-directional spiral gate valves. The maintenance gates are arranged on the upper box and/or the lower box and the side walls of the ash hoppers. With the static interceptor provided by the invention, the life cycle of a denitration catalyst can be greatly improved, and the utilization efficiency of the denitration catalyst can be improved.

Description

The static blocker of a kind of denitration of glass furnace fume
Technical field
Inventing type relates to ..., be specifically related to a kind of.
Background technology
The present quick degradating trend that aggravates regional acid rain at China's nitrogen oxide emission.Result of study shows, the increase of nitrogen oxide emission so that China's Acid Rain Pollution by sulfuric acid type to sulfuric acid and the compound transformation of nitric acid, nitrate ion in acid rain proportion from 1/10 of the eighties in last century progressively rise in recent years 1/3.The atmospheric nitrogen oxide can affect the oxidisability of atmosphere, causes the problems such as photochemical pollution, the increase of second particle thing, grey haze, has arrived the stage of improvement.
Glass furnace is the important component part of discharged nitrous oxides, done a large amount of research work aspect the NO discharge capacity in reducing glass furnace waste gas both at home and abroad, and obtained impressive progress, the control measures of the NOx in the glass furnace waste gas roughly is divided into a measure and secondary measure.
(1) to the improvement of a measure of NOx
The outstanding pollution sources control of a measure is namely strictly controlled in the source that produces NO, the formation of restriction NO, and measure is as follows:
1. oxygen and aiding combustion technology
The oxygen and aiding combustion technology comprises oxygen-enriched combusting and pure oxygen combustion technology, although the NO concentration of emission in the waste gas of glass furnace after adopting the oxygen and aiding combustion technology might increase, because the decrease of toxic emission total amount, the NO growing amount can greatly reduce.Therefore, this technology is promoted application at the glass furnace (especially container glass kiln) of European countries.
2. stratified combustion
According to the flame combustion situation in the glass furnace, the combustion zone roughly can be divided into 2 districts, namely is the high-temperature region (being the hot-zone) of oxidation state and is the low-temperature space (being the cold-zone) of reduction-state.The effect of so-called stratified combustion mainly is to reduce the hot-zone temperature to reduce the growing amount of NO, when flame sprays, simultaneously to the upper, middle and lower multi-point injection, under the effect of combustion air, forms the upper, middle and lower multilayer combustion.According to French environment specialist's introduction, adopt after the stratified combustion, the NO in the ware glass kiln waste gas can reduce 30%~50%.
3. adopt low coefficient of excess air
Result of study shows: high temperature and excessive combustion air can cause the increase of NO growing amount, and adopting low coefficient of excess air is exactly the NO growing amount that burns to reduce the thermal-flame district with minimum superfluous air capacity.The glass furnace Lambda control software of Siemens exploitation just is being based on this principle, has begun to apply at the glass furnace of European countries at present.
4. select low nitrogen spray gun
In recent years, for reducing the NO growing amount of glass furnace when burning, European countries have developed low nitrogen spray gun in succession, this spray gun mainly is to add fuel or combustion air and the ignition temperature of each section is strictly controlled to reduce the NO growing amount of glass furnace when the burning by segmentation, has begun at present to apply at the container glass kiln.
(2) NOx is carried out the after-treatment measure
The secondary measure refers to the NO that has produced in the glass furnace waste gas is processed, thus the NOx concentration when reducing toxic emission and the discharge capacity of NOx, and measure is as follows:
1. 3R technology
The implication of 3R is in inner reaction of regenerator (Rrgenerator) (Reaction) and reduction (Reduction), this technology is developed by Britain MB Group Plc, be characterized in to hydrocarbon fuels such as regenerator interpolation natural gases, NOx in itself and the regenerator waste gas is reacted and generate nitrogen and the steam of environmental sound, and this waste gas there is a burning of control, owing in regenerator, do not burn, there is not overheated danger, can not cause the scaling loss to checker yet, and can make waste gas no longer remaining fuel gas when externally discharging.Result of study shows, compare with other technology except NO, this technology can be applicable to simultaneously float glass furnace and container glass kiln have applied range, easy for operation, do not use chemicals, operating cost is low and except advantages such as NO are effective.Adopt this technology, the NOx growing amount in the glass furnace waste gas can reduce more than 80%.Certain 700 t/d float glass furnace adopts after this technology, and the NOx concentration of emission in the waste gas is by 2200 mg/Nm 3300 mg/Nm have been dropped to 3This technology has begun to apply in European countries at present.
2. selective catalytic reduction (SCR method)
The SCR technology is in suitable temperature and have under the condition that catalyst exists by reducing agent (liquefied ammonia, ammoniacal liquor, urea), " selective " with flue gas in NOx reaction and generate the technology of nitrogen G﹠W, the core of SCR denitration technology is the optimal design of many uniform fields in catalyst and the system.Its key reaction formula is as follows:
(1)????
(2)??
(3)??
(4)??
Owing to adopted special catalyst, the method can be used at a lower temperature, and the exhaust-gas treatment temperature can be down to 250~450 ℃, and its efficient except NO can reach 80%~90%, but the method operating cost is higher.
3. on-catalytic selective reduction method (SNCR method)
On-catalytic selective reduction method refers to use ammoniacal liquor (NH in waste gas treatment process 3) with the reduction of the NO in the glass furnace waste gas, generating nitrogen and the steam of environmental sound, its main chemical equation is as follows:
(5)???4NH 3?+?6NO→?5N 2?+?6H 2O
Adopt the reaction temperature of the method higher, optimal reaction temperature is about 950 ℃, and its efficient that removes NO is lower than 3R technology and SCR method, but operating cost is lower, and also useful urea replaces the report that ammoniacal liquor is made reducing agent in recent years.
SCR technology (SCR) with the plurality of advantages such as its denitration efficiency height, stable and reliable operation at home and abroad power industry be widely applied.But owing in the flue gas that glass furnace is discharged the penniform dust of many sheets is arranged, this dust can stop up by very fast pore with capillary tubing catalyst, is the very fast inefficacy of catalyst, therefore is necessary the flue gas that enters before Cuiization reaction is carried out preliminary treatment.
Summary of the invention
The purpose of inventing type is to overcome the defective that exists in the prior art, provide a kind of glass furnace eliminating flue gas is carried out pretreated static blocker, so that through interception and the flue gas of processing, greatly alleviate and delay sheet-like particle in the dust to the obstruction of capillary tubing catalyst.
For achieving the above object, the technical scheme of inventing type is the static blocker of a kind of denitration of glass furnace fume of design, it is characterized in that, described static blocker comprises the blocker casing, blocker, hanging apparatus, the bidirectional screw push-pull valve, ash bucket, unloading valve and access door, described blocker casing comprises upper box and the lower box that is installed on the pylon and links together, described blocker is arranged on the middle part of upper box and lower box, described lower box is respectively equipped with gas approach and exhanst gas outlet in the both sides of blocker, be provided with the hanging apparatus that is connected with blocker in the upper end of described blocker, side at described blocker is provided with scraper, described scraper is connected with the lower box inwall, be provided with the bidirectional screw push-pull valve in the position corresponding with blocker, the lower end of described lower box, be provided with ash bucket and unloading valve in the lower end of described bidirectional screw push-pull valve, be provided with access door at the sidewall of described upper box and/or lower box and ash bucket.
For simplified structure, be convenient to processing, convenient operation, preferably technical scheme is, the rectangular structure of described upper box, and described hanging apparatus is arranged on the middle part of upper box upper end, pull bar on the described hanging apparatus extends in the upper box from top to bottom, and is connected with blocker; Inwall middle part at described upper box is provided with the blocker sliding rail.
For the ease of linking preliminary treatment casing and flue gas inlet and outlet piping, further preferred technical scheme is, described lower box is two bucket shape bodies that link together, and the large port of described bucket shape body connects, and is respectively equipped with gas approach and exhanst gas outlet in the portlet of described two bucket shape bodies; Inwall middle part at described lower box is provided with the blocker sliding rail.
In order effectively to tackle dust large stretch of in the flue gas, further preferred technical scheme also has, described blocker comprises framework and plate frame, between described framework and plate frame, stainless steel cloth is housed, be fixed with bolt at described framework, be provided with the through hole corresponding with bolt position at described plate frame, the through hole that described bolt passes on stainless steel cloth and the plate frame cooperates with fastening nuts.
For make glass shake the flue gas of middle discharge can be all preliminary treatment by blocker, further preferred technical scheme also has, described framework is the framework identical with the large port size shape of lower box bucket shape body, the upper end of described framework is connected with pull bar in the hanging apparatus, the side of described framework be arranged on upper box and be slidingly matched with sliding rail in the middle part of the lower box.
In order effectively to tackle the large stretch of dust in the flue gas, do not hinder again the circulation of flue gas simultaneously, further preferred technical scheme also has, and the steel wire diameter of described stainless steel cloth is φ 1.37mm, and the mesh area of described stainless steel cloth is less than or equal to 70.1mm 2
For large stretch of dust that will be attached on the catch net in time cleans out, avoid the drainage difficulty of flue gas, further preferred technical scheme also has, and described scraper is arranged on the side that framework is not installed plate frame, and the spacing of described scraper and stainless steel cloth is 3 ~ 5mm.
In order to improve flue gas preliminary treatment efficient, and the clear dust that is attached on the interception expectation face that can replace, further preferred technical scheme also has, and is provided with two blockers at the middle part of described upper box and lower box, and described two blockers front and back are parallel and shift to install.
Drainage time and excretion for the ease of the control dust, further preferred technical scheme also has, described bidirectional screw push-pull valve has two, described two bidirectional screw push-pull valves are corresponding with the position of two blockers respectively, in described bidirectional screw push-pull valve, be respectively equipped with two blocks of horizontal plates, described two blocks of horizontal plates are connected with an end of screw rod in two screw mechanisms respectively, at the other end of described screw rod handwheel or crank are housed.
In order to control better drainage time and the excretion of dust, further preferred technical scheme also has, described ash bucket and unloading valve have respectively two, described two ash bucket positions are corresponding with the position of two bidirectional screw push-pull valves, described unloading valve is the star-shaped dust-discharging valve that is contained in the ash bucket, is provided with push-pull valve between described ash bucket and star-shaped dust-discharging valve.
Advantage and the beneficial effect of inventing type are: the flue gas that this denitration of glass furnace fume can be discharged glass furnace effectively with static blocker carries out preliminary treatment, can greatly improve the life cycle of out of stock catalyst by the interception of blocker, improve out of stock catalyst service efficiency, reduce the cost of denitrating flue gas, reduce the number of times of the out of stock catalyst of maintain and replace, also can improve the speed that denitrating flue gas is processed.This device also has simple in structure, and automaticity is high, and convenient operation is convenient to the characteristics of maintaining.
Description of drawings
Fig. 1 is denitration of glass furnace fume with the overall structure schematic diagram of static blocker;
Fig. 2 is B-B cutaway view among Fig. 1;
Fig. 3 is A-A cutaway view among Fig. 1;
Fig. 4 is blocker front view among Fig. 1;
Fig. 5 is the side view of blocker among Fig. 4;
Fig. 6 is K section partial enlarged drawing among Fig. 5;
Fig. 7 is I among Fig. 1,2 ~The partial structurtes enlarged drawing at XII position;
Fig. 8 is the partial structurtes enlarged drawing at C among Fig. 1,2 ~ J position.
Among the figure: 1, pylon; 2, upper box; 3, lower box; 4, blocker; 4-1, framework; 4-2, plate frame; 4-3, stainless steel cloth; 4-4, bolt; 4-5, nut; 5, gas approach; 6, exhanst gas outlet; 7, hanging apparatus; 8, scraper; 9, bidirectional screw push-pull valve; 9-1, horizontal plate; 9-2, screw rod; 9-3, handwheel or crank; 10, ash bucket; 11, unloading valve; 12, access door; 13, pull bar; 14, push-pull valve.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of inventing type is further described.Following examples only are used for the technical scheme of inventing type more clearly is described, and can not limit with this protection domain of inventing type.
Shown in Fig. 1 to 8, inventing type is the static blocker of a kind of denitration of glass furnace fume, and this static state blocker comprises blocker casing, blocker, hanging apparatus, bidirectional screw push-pull valve, ash bucket, unloading valve and access door.The blocker casing comprises upper box 2 and the lower box 3 that is installed on the pylon 1 and links together, blocker 4 is arranged on the middle part of upper box 2 and lower box 3, lower box 3 is respectively equipped with gas approach 5 and exhanst gas outlet 6 in the both sides of blocker 4, be provided with the hanging apparatus 7 that is connected with blocker in the upper end of blocker 5, side at blocker 4 is provided with scraper 8, scraper 8 is connected with the inwall of lower box 3, be provided with bidirectional screw push-pull valve 9 in the lower end of lower box 3 and blocker 4 corresponding positions, be provided with ash bucket 10 and unloading valve 11 in the lower end of bidirectional screw push-pull valve 9, be provided with access door 12 at the sidewall of upper box 2 and/or nowel 3 bodies and ash bucket 10.
In inventing type, for simplified structure, be convenient to processing, convenient operation, preferred embodiment is, upper box 2 rectangular structures are arranged on hanging apparatus 7 at the middle part of upper box 2 upper ends, pull bar 13 on the hanging apparatus 7 extends in the upper box 2 from top to bottom, and is connected with blocker 4; Inwall middle part at upper box 2 is provided with the blocker sliding rail.
In inventing type for the ease of linking preliminary treatment casing and flue gas inlet and outlet piping, further preferred embodiment is, lower box 3 is two bucket shape bodies that link together, and the large port of bucket shape body is connected, and is respectively equipped with gas approach 5 and exhanst gas outlet 6 in the portlet of two bucket shape bodies; Inwall middle part at lower box 3 also is provided with the blocker sliding rail.
In inventing type for large stretch of dust in the effective interception flue gas, further preferred embodiment also has, blocker 4 comprises framework 4-1 and plate frame 4-2, between framework 4-1 and plate frame 4-2, stainless steel cloth 4-3 is housed, be fixed with bolt 4-4 at framework 4-1, be provided with the through hole corresponding with bolt 4-4 position at plate frame 4-2, bolt 4-4 passes through hole and the nut 4-5 immovable fitting on stainless steel cloth 4-3 and the plate frame 4-2.
In inventing type for make glass shake the flue gas of middle discharge can be all preliminary treatment by blocker, further preferred embodiment also has, the framework that framework 4-1 is identical with the large port size shape of lower box 3 bucket shape bodies, the upper end of framework 4-1 is connected with pull bar 13 in the hanging apparatus, the side of framework 4-1 be arranged on the sliding rail of upper box 2 with lower box 3 middle parts and be slidingly matched.
In inventing type for the large stretch of dust in the effective interception flue gas, do not hinder again simultaneously the circulation of flue gas, further preferred embodiment also has, and the steel wire diameter of stainless steel cloth 4-3 is φ 1.37mm, and the mesh area of stainless steel cloth 3 is less than or equal to 70.1mm 2
In inventing type, in time clean out for large stretch of dust that will be attached on the catch net, avoid the drainage difficulty of flue gas, further preferred embodiment also has, and scraper 8 is arranged on the side that framework 4-1 does not install plate frame 4-2, and scraper 5 is 3 ~ 5mm with the spacing of stainless steel cloth 4-3.
In inventing type in order to improve flue gas preliminary treatment efficient, and the clear dust that is attached on the interception expectation face that can replace, further preferred embodiment also has, and be provided with 4, two blocker 4 front and back of two blockers at the middle part of described upper box 2 and lower box 3 parallel and shift to install.
In inventing type for the ease of control dust drainage time and excretion, further preferred embodiment also has, bidirectional screw push-pull valve 9 has two, two bidirectional screw push-pull valves are corresponding with the position of two blockers 4 respectively, in bidirectional screw push-pull valve 9, be respectively equipped with two horizontal plate 9-1, two horizontal plate 9-1 are connected with the end of screw rod 9-2 in two screw mechanisms respectively, at the other end of screw rod 9-2 handwheel or crank 9-3 are housed.
In inventing type in order to control better drainage time and the excretion of dust, further preferred embodiment also has, ash bucket 10 and unloading valve 11 have respectively two, two ash bucket positions are corresponding with the position of two bidirectional screw push-pull valves 9, unloading valve 11 is provided with push-pull valve 14 for being contained in the star-shaped dust-discharging valve in the ash bucket 10 between ash bucket 10 and star-shaped dust-discharging valve 11.
This denitration of glass furnace fume with the operation principle of static blocker is: smoke gas flow flows in flue with certain flow rate (15-18m/s), and during through this static state blocker, wind speed is reduced to 3-5m/s; Smoke gas flow flows to denitration reaction catalyst direction by twice blocker filter screen (filter screen adopts stainless steel steel wire, diameter phi 1.37mm, Mesh distance 3mm * 3mm, perforated area 70.1).In this course, large stretch of featheriness dust is stoped on the stainless steel wire net surface by stainless steel cloth in the smoke gas flow, thereby guarantees that the smoke gas flow that flows to catalyst can not get clogged by the catalyst surface aperture smoothly, prolongs the service life of denitrating catalyst.As time goes on, the online featheriness dust of stainless steel wire is cumulative, the dust that has can be at self falling under the Action of Gravity Field, fall into (if dust toughness in the following bidirectional screw push-pull valve, can the start by set date boom hoisting, make the stainless steel cloth of blocker under the effect of scraper, scrape off the dust on surface.Remain with the 3-5mm safety clearance between scraper and the filter screen).Time opening bidirectional screw push-pull valve makes dust stratification fall into ash bucket, then starts unloading valve by artificial or other modes, and dust stratification is emitted.It should be noted that in the process of cleaning dust stratification, start first blocker stainless steel cloth boom hoisting, after stainless steel cloth is cleaned out reduction, restart the plate of bidirectional screw push-pull valve homonymy, after dust stratification discharges, again plate is seated.Then clear up the online dust stratification of opposite side stainless steel wire.
The above only is the preferred embodiment of inventing type; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the inventing type know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of inventing type.

Claims (10)

1. static blocker of denitration of glass furnace fume, it is characterized in that, described static blocker comprises the blocker casing, blocker, hanging apparatus, the bidirectional screw push-pull valve, ash bucket, unloading valve and access door, described blocker casing comprises upper box and the lower box that is installed on the pylon and links together, described blocker is arranged on the middle part of upper box and lower box, described lower box is respectively equipped with gas approach and exhanst gas outlet in the both sides of blocker, be provided with the hanging apparatus that is connected with blocker in the upper end of described blocker, side at described blocker is provided with scraper, described scraper is connected with the lower box inwall, be provided with the bidirectional screw push-pull valve in the position corresponding with blocker, the lower end of described lower box, be provided with ash bucket and unloading valve in the lower end of described bidirectional screw push-pull valve, be provided with access door at the sidewall of described upper box and/or lower box and ash bucket.
2. the static blocker of denitration of glass furnace fume as claimed in claim 1, it is characterized in that, the rectangular structure of described upper box, described hanging apparatus is arranged on the middle part of upper box upper end, pull bar on the described hanging apparatus extends in the upper box from top to bottom, and is connected with blocker; Inwall middle part at described upper box is provided with the blocker sliding rail.
3. the static blocker of denitration of glass furnace fume as claimed in claim 2, it is characterized in that, described lower box is two bucket shape bodies that link together, and the large port of described bucket shape body connects, and is respectively equipped with gas approach and exhanst gas outlet in the portlet of described two bucket shape bodies; Inwall middle part at described lower box is provided with the blocker sliding rail.
4. the static blocker of denitration of glass furnace fume as claimed in claim 3, it is characterized in that, described blocker comprises framework and plate frame, between described framework and plate frame, stainless steel cloth is housed, be fixed with bolt at described framework, be provided with the through hole corresponding with bolt position at described plate frame, the through hole that described bolt passes on stainless steel cloth and the plate frame cooperates with fastening nuts.
5. the static blocker of denitration of glass furnace fume as claimed in claim 4, it is characterized in that, described framework is the framework identical with the large port size shape of lower box bucket shape body, the upper end of described framework is connected with pull bar in the hanging apparatus, the side of described framework be arranged on upper box and be slidingly matched with sliding rail in the middle part of the lower box.
6. the static blocker of denitration of glass furnace fume as claimed in claim 5 is characterized in that, the steel wire diameter of described stainless steel cloth is φ 1.37mm, and the mesh area of described stainless steel cloth is less than or equal to 70.1mm 2
7. the static blocker of denitration of glass furnace fume as claimed in claim 6 is characterized in that, described scraper is arranged on the side that framework is not installed plate frame, and the spacing of described scraper and stainless steel cloth is 3 ~ 5mm.
8. the static blocker of denitration of glass furnace fume as claimed in claim 7 is characterized in that, is provided with two blockers at the middle part of described upper box and lower box, and is parallel and shift to install before and after described two blockers.
9. the static blocker of denitration of glass furnace fume as claimed in claim 8, it is characterized in that, described bidirectional screw push-pull valve has two, described two bidirectional screw push-pull valves are corresponding with the position of two blockers respectively, in described bidirectional screw push-pull valve, be respectively equipped with two blocks of horizontal plates, described two blocks of horizontal plates are connected with an end of screw rod in two screw mechanisms respectively, at the other end of described screw rod handwheel or crank are housed.
10. such as the static blocker of the described denitration of glass furnace fume of any one in the claim 1 to 9, it is characterized in that, described ash bucket and unloading valve have respectively two, described two ash bucket positions are corresponding with the position of two bidirectional screw push-pull valves, described unloading valve is the star-shaped dust-discharging valve that is contained in the ash bucket, is provided with push-pull valve between described ash bucket and star-shaped dust-discharging valve.
CN201210203853.6A 2012-06-19 2012-06-19 Static interceptor used in glass furnace flue gas denitration Active CN102847389B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2407248Y (en) * 2000-01-31 2000-11-22 北京添捷除尘设备有限责任公司 Duster with sintered stainless steel net
CN201161143Y (en) * 2008-01-02 2008-12-10 珠海格力电器股份有限公司 Automatic cleaning dust gauze
CN102350148A (en) * 2011-06-30 2012-02-15 李巍 Filtering device for coke ash
US20120060696A1 (en) * 2010-09-13 2012-03-15 Atomic Energy Council-Institute Of Nuclear Energy Research Air filtering system capable of enhancing inspection convenience
CN202682963U (en) * 2012-06-19 2013-01-23 江苏亿金环保科技股份有限公司 Static interceptor for smoke denitration of glass kiln

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2407248Y (en) * 2000-01-31 2000-11-22 北京添捷除尘设备有限责任公司 Duster with sintered stainless steel net
CN201161143Y (en) * 2008-01-02 2008-12-10 珠海格力电器股份有限公司 Automatic cleaning dust gauze
US20120060696A1 (en) * 2010-09-13 2012-03-15 Atomic Energy Council-Institute Of Nuclear Energy Research Air filtering system capable of enhancing inspection convenience
CN102350148A (en) * 2011-06-30 2012-02-15 李巍 Filtering device for coke ash
CN202682963U (en) * 2012-06-19 2013-01-23 江苏亿金环保科技股份有限公司 Static interceptor for smoke denitration of glass kiln

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