CN105854455A - Porous ceramic dust remover - Google Patents
Porous ceramic dust remover Download PDFInfo
- Publication number
- CN105854455A CN105854455A CN201610337054.6A CN201610337054A CN105854455A CN 105854455 A CN105854455 A CN 105854455A CN 201610337054 A CN201610337054 A CN 201610337054A CN 105854455 A CN105854455 A CN 105854455A
- Authority
- CN
- China
- Prior art keywords
- pipe
- porous ceramic
- deduster
- tube
- porous ceramics
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0087—Bypass or safety valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
- B01D46/762—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations involving sonic or ultrasonic waves
Abstract
The invention provides a porous ceramic dust remover which comprises an emergency bypass device, an installation fixing device and a rapid connecting device, wherein the emergency bypass device is provided with a valved cylinder equipped with an electromagnetic valve, a valve plate is arranged at the bottom of the cylinder, the top of the cylinder is equipped with an air inlet pipe and a copper air nozzle, the valved cylinder is mounted on a base, air holes are formed in two sides of the base, and a round graphite gasket used for sealing is arranged at the periphery of a partition bypass hole; one end of a porous ceramic tube in the installation fixing device forms arc transition, a tube seal cushion is manufactured into a biarc shape forming a certain clearance with the porous ceramic tube and is attached to a tube nest and the porous ceramic tube, the top of the porous ceramic tube is equipped with a graphite flat washer, a tube pressing plate is fixed on the tube nest through bolts; one end of a blowing elbow in the rapid connecting device is welded with a connecting end with a tapered structure, one end of a long spray tube with a nozzle is also welded with the connecting end, the blowing elbow and the long spray tube are connected and tightly locked by a stainless steel clamp with a groove formed in an inner ring, and a seal ring is arranged between the blowing elbow and the long spray tube.
Description
Technical field
The present invention relates to a kind of smoke dust-removing equipment, especially relate to a kind of porous ceramics deduster.
Background technology
Porous ceramics deduster has cleaning high temperature resistant, corrosion-resistant, resistance to, mechanical strength is big, Stability Analysis of Structures is indeformable and the outstanding advantages such as life-span length, thus is considered as the optimal selection of hot particle filtering material.Porous ceramics Separation Efficiency of Dust Remover is high, and dust removal efficiency typically can be more than 99.99%, its strainability, and filtering especially for the fine particle of below PM2.5 is that other dedusting, dust collection device are incomparable.Additionally, micropore ceramic filter film will not produce secondary pollution, it is various exhaust-gas treatment optimum and the most promising method.
But because of the sintering flue gas of a lot of industries have Submicron Particles concentration of emission high, than resistance compared with feature high, that water capacity big, dust adhesion is strong, corrosivity is strong, the problems such as membrane tube generation blocking are frequently resulted in when Long-Time Service, strainability is reduced, circulation tails off, it is impossible to adapt to the demand of commercial Application.
Meanwhile, in existing deduster, injection tube attachment structure typically directly welds together during installing, and installs and overhaul particularly troublesome, and is unfavorable for aligning of jet nozzle and filter bag.
Summary of the invention
The technical problem that system is run is affected in order to solve the blocking the most that may be present of porous ceramic pipe in prior art, and porous ceramic pipe occur when mounted because of heating, chilling temperature change cause porous ceramics tube head to crack, there is brittle fracture, affect stable operation, and the difficult problem such as jet pipe mounting structure is complex, poor reliability, installation are more difficult to, it is desirable to provide a kind of novel porous ceramics deduster, dedusting can be completed clean, again can Fast Installation and emergent through-flow.
The present invention, mainly by following technical proposals, solves above-mentioned technical barrier:
A kind of porous ceramics deduster, it is provided with porous ceramic filter element between entrance and the outlet of deduster, characterized by further comprising emergency bypass device, fixing device for installing and Quick Connect Kit, wherein emergency bypass device has the band valve cylinder being equipped with magnetic valve, cylinder bottom arranges valve plate, valve plate is fixed by nut, plain cushion, spring washer, cylinder head is furnished with air inlet pipe and copper valve, band valve cylinder is arranged on base, on base, both sides have pore, and dividing plate bypass opening is provided around sealing circular graphitic pad；In fixing device for installing, porous ceramic pipe one end is arc-shaped transition, seal of tube pad is made with porous ceramic pipe with the bicircular arcs shape of certain interval, it is fitted in pipe card and porous ceramic pipe, is furnished with graphite plain washer at the top of porous ceramic pipe, by bolt, pipe pressing plate is fixed on pipe card；Bend pipe one end welding of jetting in Quick Connect Kit has the connection end of pyramidal structure, long jet pipe same one end welded ends with nozzle, winding-up bend pipe is offered reeded stainless steel lathe dog with long jet pipe by inner ring and is connected and locks, and is provided with sealing ring at winding-up bend pipe in the middle of long jet pipe.
Further, arranging emergency bypass device in the inside of porous ceramics deduster, this bypath system is arranged on the card between the upper box of deduster and lower box, has circular bypass opening in the middle of card.Emergency bypass device stretching by band valve cylinder, drive the up and down motion of valve plate, can fit tightly with the graphite pads of installation on dividing plate when valve plate elongation moves downward, thus prevent gas leakage, when system detects that lower cavity pressure significantly increases, when porous ceramics operationally there may be blocking and affects system operation, band valve cylinder shrinks, valve plate is opened, and the flue gas air-vent through base both sides is discharged.
Further, below band valve cylinder and base, it is also possible to configuration ultrasonic oscillation device, utilize the high frequency sound wave of ultrasonic wave to produce vibration, thus wash away the micronic dust of porous ceramics deduster blocking channel, reach cleaning performance.This ultrasonic oscillation device, the one end configuring one or more transducer is connected with magnetic valve, and the other end is connected with shake plate, ultrasonic generator.Controlled the keying of transducer by the folding of magnetic valve, and then control shake and the effect of ultrasonic generator of shake plate.The configuration of transducer and interval make the focus point of vibration overlap with the traveling path of band valve cylinder.Transducer is caused transducer with the hunting of frequency between 0.2 to 5.0MHZ by solenoid-driven.
Further, a kind of porous ceramics deduster has special porous ceramic pipe fixing device for installing, wherein porous ceramic pipe one end is arc-shaped transition, when avoiding flue gas, thermal stress is concentrated, seal of tube pad is graphite material, makes with porous ceramic pipe with the bicircular arcs shape of certain interval, can be fitted tightly over pipe card and porous ceramic pipe, it is furnished with graphite plain washer at the top of porous ceramic pipe, by bolt, pipe pressing plate is fixed on pipe card.
Further, the pipe card of described porous ceramic pipe fixing device for installing uses slab digital control processing to become arc-shaped hole, described porous ceramic pipe seal of tube pad to use the bicircular arcs shape packing ring of graphite.Porous ceramic pipe uses the pipe pressing plate of special shape to compress, and pipe pressing plate uses two jiaos to fix, the convenient perpendicularity regulating porous ceramic pipe during installation.
Further, in the Quick Connect Kit of a kind of porous ceramics deduster, the welding of winding-up bend pipe one end has the connection end of pyramidal structure, long jet pipe same one end welded ends with nozzle, winding-up bend pipe can also be offered screw thread rotation by inner ring with long jet pipe and be connected, and is provided with sealing ring at winding-up bend pipe in the middle of long jet pipe.
The innovation of the present invention is to revolutionize the troubleshooting scheme of conventional porous ceramics deduster, by built-in emergency bypass device, it is achieved the flexibility of dust removal and filtration processes, it is to avoid prior art blocking occurs, hinders dead phenomenon generation.By being equipped with magnetic valve, the air pressure in deduster is sensed automatically, it is achieved the Automatic adjusument of dust removal and filtration.By adding air-vent and base ventilation holes, the flow field changing air is arranged, can produce disturbance effect, and then strengthen filtering rate.It addition, by installing ultrasonic oscillation device additional, the vibration of transducer is made to produce the dirt removal that ultrasonic wave can be used for the passage surfaces externally and internally of porous ceramics deduster, it is achieved efficient, energy-conservation, cyclically use porous ceramics deduster.Additionally, arranged by fixing device for installing and Quick Connect Kit, it is achieved that structure is easy for installation, quick, and reliability is preferable.
The present invention has simple and reasonable for structure, uniform force, installs easily, the features such as cost is low, and fixing porous ceramic pipe and winding-up bend pipe life-span are long, and the situation that head ruptures occurs the most again.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of emergency bypass device of the present invention.
Accompanying drawing 2 is the structural representation of fixing device for installing of the present invention.
Accompanying drawing 3 is the structural representation of Quick Connect Kit of the present invention.
Wherein, 1 band valve cylinder；2 nuts；3 plain cushions；4 spring washers；5 valve plates；6 air inlet pipe；7 bronze medal valves；8 bases；9 graphite pads；10 porous ceramic pipes；11 pipe cards；12 seal of tube pads；13 plain washers；14 pipe pressing plates；15 bolts；16 winding-up bend pipes；17 connect end；18 stainless steel lathe dog；19 long jet pipes；20 nozzles.
Detailed description of the invention
Below by embodiment, and combine accompanying drawing, technical scheme is described in further detail.
Embodiment 1: a kind of porous ceramics deduster, it is provided with porous ceramic filter element between entrance and the outlet of deduster, characterized by further comprising emergency bypass device, fixing device for installing and Quick Connect Kit, wherein emergency bypass device is provided with band valve cylinder (1) being equipped with magnetic valve, and cylinder bottom is provided with valve plate (5)；Valve plate (5) is fixed by nut (2), plain cushion (3), spring washer (4), and cylinder head is furnished with air inlet pipe (6) and copper valve (7).Band valve cylinder is arranged on base (8), and the upper both sides of base (8) have pore, and dividing plate bypass opening is provided around sealing circular graphitic pad (9)；In fixing device for installing, porous ceramic pipe (10) one end is arc-shaped transition, seal of tube pad (12) is graphite material, make with porous ceramic pipe (10) with the bicircular arcs shape of certain interval, it is fitted in pipe card (11) and porous ceramic pipe (10), it is furnished with graphite plain washer (13) at the top of porous ceramic pipe (10), by bolt (15), pipe pressing plate (14) is fixed on pipe card (11)；Bend pipe (16) one end welding of jetting in Quick Connect Kit has the connection end (17) of pyramidal structure, same one end welded ends (17) of long jet pipe (19) with nozzle, winding-up bend pipe (16) is offered reeded stainless steel lathe dog (18) with long jet pipe (19) by inner ring and is connected and locks, and is provided with sealing ring in the middle of winding-up bend pipe (16) with long jet pipe (19).
The emergency bypass device of porous ceramics deduster is arranged on the inside of porous ceramics deduster, it is specially on the card between upper box and lower box, circular bypass opening is had in the middle of card, stretching by band valve cylinder (1), drive the up and down motion of valve plate (5), can fit tightly with the graphite pads of installation on dividing plate when valve plate (5) elongation moves downward, thus prevent gas leakage, when system detects that lower cavity pressure significantly increases, when porous ceramics operationally there may be blocking and affects system operation, band valve cylinder (1) shrinks, valve plate (5) is opened, the flue gas air-vent through base (8) both sides is discharged.
The pipe card (11) of porous ceramics deduster fixing device for installing uses slab digital control processing to become arc-shaped hole, and seal of tube pad (12) uses the bicircular arcs shape packing ring of graphite.Porous ceramic pipe uses the pipe pressing plate (14) of special shape to compress, and pipe pressing plate (14) uses two jiaos to fix, the perpendicularity of convenient regulation porous ceramic pipe (10) during installation.
Embodiment 2: a kind of porous ceramics deduster, it is provided with porous ceramic filter element between entrance and the outlet of deduster, characterized by further comprising emergency bypass device, fixing device for installing and Quick Connect Kit, wherein emergency bypass device is provided with band valve cylinder (1) being equipped with magnetic valve, and cylinder bottom is provided with valve plate (5)；Valve plate (5) is fixed by nut (2), plain cushion (3), spring washer (4), and cylinder head is furnished with air inlet pipe (6) and copper valve (7).Band valve cylinder is arranged on base (8), and the upper both sides of base (8) have pore, and dividing plate bypass opening is provided around sealing circular graphitic pad (9)；In fixing device for installing, porous ceramic pipe (10) one end is arc-shaped transition, seal of tube pad (12) is graphite material, make with porous ceramic pipe (10) with the bicircular arcs shape of certain interval, it is fitted in pipe card (11) and porous ceramic pipe (10), it is furnished with graphite plain washer (13) at the top of porous ceramic pipe (10), by bolt (15), pipe pressing plate (14) is fixed on pipe card (11)；Bend pipe (16) one end welding of jetting in Quick Connect Kit has the connection end (17) of pyramidal structure, same one end welded ends (17) of long jet pipe (19) with nozzle, winding-up bend pipe (16) is offered screw thread rotation with long jet pipe (19) by inner ring and is connected, and is provided with sealing ring in the middle of winding-up bend pipe (16) with long jet pipe (19).
The emergency bypass device of porous ceramics deduster is arranged on the inside of porous ceramics deduster, it is specially on the card between upper box and lower box, circular bypass opening is had in the middle of card, stretching by band valve cylinder (1), drive the up and down motion of valve plate (5), can fit tightly with the graphite pads of installation on dividing plate when valve plate (5) elongation moves downward, thus prevent gas leakage, when system detects that lower cavity pressure significantly increases, when porous ceramics operationally there may be blocking and affects system operation, band valve cylinder (1) shrinks, valve plate (5) is opened, the flue gas air-vent through base (8) both sides is discharged.In band valve cylinder (1) and base (8) lower section, installing ultrasonic oscillation device additional, the one end configuring one or more transducer is connected with magnetic valve, and the other end is connected with shake plate, ultrasonic generator.Controlled the keying of transducer by the folding of magnetic valve, and then control shake and the effect of ultrasonic generator of shake plate.The configuration of transducer and interval make the focus point of vibration overlap with the traveling path of band valve cylinder.Transducer is caused transducer with the hunting of frequency between 0.2 to 5.0MHZ by solenoid-driven.
The pipe card (11) of porous ceramics deduster fixing device for installing uses slab digital control processing to become arc-shaped hole, and seal of tube pad (12) uses the bicircular arcs shape packing ring of graphite.Porous ceramic pipe uses the pipe pressing plate (14) of special shape to compress, and pipe pressing plate (14) uses two jiaos to fix, the perpendicularity of convenient regulation porous ceramic pipe (10) during installation.
The foregoing is only the specific embodiment of the present invention, but the architectural feature of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and change or the modification made all are contained among the scope of the claims of the present invention.
Claims (8)
1. a porous ceramics deduster, it is provided with porous ceramic filter element between entrance and the outlet of deduster, characterized by further comprising emergency bypass device, fixing device for installing and Quick Connect Kit, wherein emergency bypass device has the band valve cylinder being equipped with magnetic valve, cylinder bottom arranges valve plate, valve plate is fixed by nut, plain cushion, spring washer, cylinder head is furnished with air inlet pipe and copper valve, band valve cylinder is arranged on base, on base, both sides have pore, and dividing plate bypass opening is provided around sealing circular graphitic pad；In fixing device for installing, porous ceramic pipe one end is arc-shaped transition, seal of tube pad is made with porous ceramic pipe with the bicircular arcs shape of certain interval, it is fitted in pipe card and porous ceramic pipe, is furnished with graphite plain washer at the top of porous ceramic pipe, by bolt, pipe pressing plate is fixed on pipe card；Bend pipe one end welding of jetting in Quick Connect Kit has the connection end of pyramidal structure, long jet pipe same one end welded ends with nozzle, winding-up bend pipe is offered reeded stainless steel lathe dog with long jet pipe by inner ring and is connected and locks or screw thread rotation connection, is provided with sealing ring at winding-up bend pipe in the middle of long jet pipe.
A kind of porous ceramics deduster the most according to claim 1, it is characterized in that described emergency bypass device is in the inside of porous ceramics deduster, described porous ceramics deduster emergency bypass device is arranged on the card between the upper box of deduster and lower box, circular bypass opening is had in the middle of card, being welded with base on porous ceramics deduster internal partition, band valve cylinder is installed on the base.
A kind of porous ceramics deduster the most according to claim 1, it is characterized in that below the band valve cylinder in described emergency bypass device and base, install ultrasonic oscillation device additional, the genuine device of this ultrasonic wave configures one end of one or more transducer and is connected with magnetic valve, the other end is connected with shake plate, ultrasonic generator, and the configuration of transducer and interval make the focus point of vibration overlap with the traveling path of band valve cylinder.
A kind of porous ceramics deduster emergency bypass device the most according to claim 3, it is characterised in that described ultrasonic oscillation device, the transducer of its configuration is by solenoid-driven, with the hunting of frequency between 0.2 to 5.0MHZ.
A kind of porous ceramics deduster the most according to claim 1, it is characterized in that the porous ceramic pipe pipe card in described fixing device for installing uses slab digital control processing to become arc-shaped hole, described porous ceramic pipe seal of tube pad to use the bicircular arcs shape packing ring of graphite.
A kind of porous ceramics deduster the most according to claim 1, it is characterized in that the porous ceramic pipe in described fixing device for installing uses the pipe pressing plate of special shape to compress, pipe pressing plate uses two jiaos to fix, the convenient perpendicularity regulating porous ceramic pipe during installation.
A kind of porous ceramics deduster the most according to claim 1, it is characterised in that be all welded with the connection end of pyramidal structure on the long jet pipe of the winding-up bend pipe in described Quick Connect Kit.
A kind of porous ceramics deduster the most according to claim 1, it is characterised in that the winding-up bend pipe in described Quick Connect Kit is offered screw thread rotation with long jet pipe by inner ring and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610337054.6A CN105854455B (en) | 2016-05-20 | 2016-05-20 | A kind of porous ceramics deduster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610337054.6A CN105854455B (en) | 2016-05-20 | 2016-05-20 | A kind of porous ceramics deduster |
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| Publication Number | Publication Date |
|---|---|
| CN105854455A true CN105854455A (en) | 2016-08-17 |
| CN105854455B CN105854455B (en) | 2018-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610337054.6A Active CN105854455B (en) | 2016-05-20 | 2016-05-20 | A kind of porous ceramics deduster |
Country Status (1)
| Country | Link |
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| CN (1) | CN105854455B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108236845A (en) * | 2017-12-25 | 2018-07-03 | 徐际华 | A kind of flue gas separating and filtering ceramic tube and its installation method |
| CN111544975A (en) * | 2020-06-09 | 2020-08-18 | 中机国能电力工程有限公司 | Dust removing method and device for bag-type dust remover |
| CN114515477A (en) * | 2022-04-19 | 2022-05-20 | 中用科技(南通)有限公司 | Wisdom building outer wall decoration air purification equipment |
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| CN201006382Y (en) * | 2007-02-16 | 2008-01-16 | 吉林安洁环保有限公司 | Low-pressure impulse bag-type collector with U-shaped sedimentation chamber and built-in by-pass air flue |
| CN102228766A (en) * | 2011-06-28 | 2011-11-02 | 常州市康安环保设备有限公司 | Pulse back-flushing bag filter |
| CN202315568U (en) * | 2011-10-27 | 2012-07-11 | 于波涛 | By-pass valve for flue of bag type dust collector |
| CN203075776U (en) * | 2013-01-29 | 2013-07-24 | 乌鲁木齐鑫三富环保设备有限公司 | Bag type dust collector with built-in bypass flue |
| KR101296243B1 (en) * | 2013-06-27 | 2013-08-13 | 이성헌 | Wet type dust collector for air purifying |
| CN203469712U (en) * | 2013-08-30 | 2014-03-12 | 山东纳瑞环保科技有限公司 | Ceramic tube filtering device applicable to high-temperature dust removal filter |
| CN204543816U (en) * | 2015-02-13 | 2015-08-12 | 河南兰兴电力机械有限公司 | The built-in double-deck bypass valve of a kind of sack cleaner |
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2016
- 2016-05-20 CN CN201610337054.6A patent/CN105854455B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201006382Y (en) * | 2007-02-16 | 2008-01-16 | 吉林安洁环保有限公司 | Low-pressure impulse bag-type collector with U-shaped sedimentation chamber and built-in by-pass air flue |
| CN102228766A (en) * | 2011-06-28 | 2011-11-02 | 常州市康安环保设备有限公司 | Pulse back-flushing bag filter |
| CN202315568U (en) * | 2011-10-27 | 2012-07-11 | 于波涛 | By-pass valve for flue of bag type dust collector |
| CN203075776U (en) * | 2013-01-29 | 2013-07-24 | 乌鲁木齐鑫三富环保设备有限公司 | Bag type dust collector with built-in bypass flue |
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| CN203469712U (en) * | 2013-08-30 | 2014-03-12 | 山东纳瑞环保科技有限公司 | Ceramic tube filtering device applicable to high-temperature dust removal filter |
| CN204543816U (en) * | 2015-02-13 | 2015-08-12 | 河南兰兴电力机械有限公司 | The built-in double-deck bypass valve of a kind of sack cleaner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108236845A (en) * | 2017-12-25 | 2018-07-03 | 徐际华 | A kind of flue gas separating and filtering ceramic tube and its installation method |
| CN111544975A (en) * | 2020-06-09 | 2020-08-18 | 中机国能电力工程有限公司 | Dust removing method and device for bag-type dust remover |
| CN114515477A (en) * | 2022-04-19 | 2022-05-20 | 中用科技(南通)有限公司 | Wisdom building outer wall decoration air purification equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105854455B (en) | 2018-09-11 |
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