CN205949064U - Vertical wet -type electrostatic precipitator and hierarchical washing unit thereof - Google Patents
Vertical wet -type electrostatic precipitator and hierarchical washing unit thereof Download PDFInfo
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- CN205949064U CN205949064U CN201620881313.7U CN201620881313U CN205949064U CN 205949064 U CN205949064 U CN 205949064U CN 201620881313 U CN201620881313 U CN 201620881313U CN 205949064 U CN205949064 U CN 205949064U
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Abstract
The utility model relates to a vertical wet -type electrostatic precipitator and hierarchical washing unit thereof, the dust remover includes the casing, the bottom of casing is connected with the flue gas entrance, and the top of casing is connected with the exhanst gas outlet section, be equipped with electric dust collecting device and hierarchical washing unit in the cavity of casing, electricity dust collecting device includes that the interval sets up last positive pole channel assembly and lower positive pole channel assembly in the casing, goes up positive pole channel assembly and positive pole channel assembly down and goes up respectively to run through in vertical relative positive pole pipeline and set up same negative pole line, hierarchical washing unit including set up in the branch shape upper portion spray set of last positive pole channel assembly top with set up under with in the middle part of annular between the positive pole channel assembly spray set in last positive pole channel assembly. The utility model discloses can adapt to the great occasion of exhaust gas volumn, make electrostatic precipitator handle the high concentration ash -laden gas simultaneously and do not take place positive pole permanent deposition in surface and scaling phenomenon during the long -time running.
Description
Technical field
This utility model is with regard to flue gas wet-esp technology, more particularly, to a kind of vertical wet electrical dust precipitator and its point
Level flusher.
Background technology
Wet electrical dust precipitator processes saturated flue gas and has very high dedusting, demisting efficiency, at present in electric power, metallurgy, chemical industry
Widely applied etc. industry, its principle is to maintain the positive plate composition passage of a determining deviation, cathode line is located at passage central authorities
Position, by introducing high voltage power supply, the charged rear convergence adsorb on positive plate in the electric field of the microgranule in flue gas, flue gas obtains
Discharge after purification.Spray system is set at wet electrical dust precipitator top, using fresh water (FW), positive plate is carried out with interruption and rinse, make sun
Pole surface keeps clean, and the anode of wet electrical dust precipitator constantly repeats the process adsorbed dust, rinse.For high-rating generator
Group, sintering machine and burning machine etc., big due to processing exhaust gas volumn, the height of positive plate is very high, arranges nozzle rinse at electric field top,
Washing away of current can not act directly on anode lower area, during equipment longtime running anode lower area easily occur dust stratification,
Scale formation, efficiency of dust collection is gradually lowered.For avoiding case above, have in actual motion increase washing water quantity, artificially prolong
Long washing time, causes the waste of water resource, exacerbates the contradiction between environmental resource and economic development it is therefore necessary to change
Enter backwashing manner, strengthen developing result, reduce water consumption.
Thus, the present inventor relies on experience and the practice being engaged in relevant industries for many years, proposes a kind of vertical wet-esp
Device and its classification flusher, to overcome the defect of prior art.
Utility model content
The purpose of this utility model is to provide a kind of vertical wet electrical dust precipitator and its classification flusher, can adapt to
The larger occasion of exhaust gas volumn, makes electric cleaner, when processing high concentration ash-laden gas and longtime running, anode table not occur simultaneously
The permanent dust stratification in face and scale formation.
The purpose of this utility model is achieved in that a kind of vertical wet electrical dust precipitator, this vertical wet electrical dust precipitator
Including the cylindrical shell being vertically arranged；The bottom of this cylindrical shell is connected with radial dimension smoke inlet section tapered downwards, should
The top of cylindrical shell is connected with radial dimension exhanst gas outlet section tapered upwards；It is provided with air flow method in described smoke inlet section
Plate；It is provided with electric dust collecting means and classification flusher in the cavity of described cylindrical shell；Described electric dust collecting means include interval and set
It is placed in the Anodic channel components in cylindrical shell and lower anode passages assembly, Anodic channel components and lower anode passages assembly
Structure identical and in the vertical direction is oppositely arranged, Anodic channel components each with lower anode passages assembly vertically relative to
Setting same cathode line is extended through in anode pipe；Described classification flusher includes being arranged on Anodic channel components
The branch shape top spray equipment of side and the annular middle part spray being arranged between Anodic channel components and lower anode passages assembly
Shower device.
In a better embodiment of the present utility model, described Anodic channel components and lower anode passages assembly are respectively
It is fixed in cylindrical shell by corresponding anode superstructure；Anodic channel components are by the multiple Anodic passages being vertically arranged side by side
Module forms；Lower anode passages assembly is made up of the multiple lower anode passages module being vertically arranged side by side；Anodic channel module
Be respectively formed with multiple anode pipe contacting with each other and being vertically arranged side by side in lower anode passages module.
In a better embodiment of the present utility model, described Anodic channel components are by four Anodic channel modules
Composition, described lower anode passages assembly is made up of four lower anode passages modules.
In a better embodiment of the present utility model, the two ends of each described cathode line are individually fixed in cathode frame
With lower cathode frame；Each described cathode line is electrically connected with High voltage power supply equipment.
In a better embodiment of the present utility model, described branch shape top spray equipment includes being arranged on a support
On water-supply-pipe and the multiple showers being extended by this water-supply-pipe both sides, each shower is provided with multiple nozzles.
In a better embodiment of the present utility model, described annular middle part spray equipment is included in cylindrical shell
The annular spray pipe road of wall setting, this annular spray pipe road is provided with multiple nozzles；Described nozzle is towards lower anode passages assembly
Setting.
In a better embodiment of the present utility model, described annular middle part spray equipment is included in cylindrical shell
The annular spray pipe road of wall setting, it is in criss-cross water pipeline that this annular spray pipe road connects one, this annular spray pipe road
Constitute the circular spray tube road of corresponding four lower anode passages modules respectively with criss-cross water pipeline；This annular spray pipe road
It is provided with multiple nozzles with criss-cross water pipeline；Described nozzle is arranged towards lower anode passages module.
It may also is that realizing, dress is rinsed in a kind of classification for vertical wet electrical dust precipitator to the purpose of this utility model
Put, described classification flusher is arranged on inside vertical wet electrical dust precipitator；Described classification flusher includes branch shape top
Spray equipment and annular middle part spray equipment.
In a better embodiment of the present utility model, described branch shape top spray equipment includes being arranged on a support
On water-supply-pipe and the multiple showers being extended by this water-supply-pipe both sides, each shower is provided with multiple nozzles；Described ring
In the middle part of shape, spray equipment includes the annular spray pipe road around the setting of cylindrical shell inwall, and this annular spray pipe road is provided with multiple
Nozzle.
In a better embodiment of the present utility model, described annular middle part spray equipment is included around cleaner unit inwall
Setting annular spray pipe road, on this annular spray pipe road connect one be in criss-cross water pipeline, this annular spray pipe road with
Criss-cross water pipeline constitutes four circular spray tube roads；This annular spray pipe road and criss-cross water pipeline are provided with many
Individual nozzle.
From the above mentioned, in vertical wet electrical dust precipitator of the present utility model, the anode of electric dust collecting means is divided into Anodic
Channel components and lower anode passages assembly, but cathode line is still connected as a single entity and runs through Anodic channel components and lower anode passages
Assembly, thus, it is possible to reach the dust removing effects of two-stage electric field series connection, investment is substantially less than the structure of two-stage electric field series connection, possesses
Certain cost advantage；Combined to wet using branch shape top spray equipment and annular middle part spray equipment in this utility model
The top of formula electric cleaner, lower area classification are rinsed and are controlled, and anode lower area can be rinsed current and cover comprehensively, increase
Strong developing result, when rinsing every time, anode and cathode surface are properly washed, and eliminate flushing blind area, it is to avoid polar board surface dust stratification
With fouling it is ensured that stable efficiency of dust collection.
Brief description
The following drawings is only intended to, in this utility model is done with schematic illustration and explanation, not limit model of the present utility model
Enclose.Wherein：
Fig. 1：Structural representation for the vertical wet electrical dust precipitator of this utility model.
Fig. 2：Overlooking the structure diagram for electric dust collecting means in this utility model.
Fig. 3:Overlooking the structure diagram for branch shape top spray equipment in this utility model.
Fig. 4:Overlooking the structure diagram for annular middle part spray equipment in this utility model.
Fig. 5:Overlooking the structure diagram for airflow-distribution board in this utility model.
Specific embodiment
In order to be more clearly understood to technical characteristic of the present utility model, purpose and effect, now compare brief description
Specific embodiment of the present utility model.
As shown in Fig. 1～Fig. 5, the utility model proposes a kind of vertical wet electrical dust precipitator 100 and its classification flusher
6, described classification flusher 6 is arranged on inside vertical wet electrical dust precipitator 100；Described vertical wet electrical dust precipitator 100 includes
The cylindrical shell 1 being vertically arranged；The bottom of this cylindrical shell 1 is connected with radial dimension smoke inlet section 2 tapered downwards, this post
The top of shape housing 1 is connected with radial dimension exhanst gas outlet section 3 tapered upwards；It is provided with air-flow in described smoke inlet section 1 to divide
Fabric swatch 4；It is provided with electric dust collecting means 5 and classification flusher 6 in the cavity of described cylindrical shell 1；Described electric dust collecting means 5 include
Be arranged at intervals at the Anodic channel components 51 in cylindrical shell 1 and lower anode passages assembly 52, Anodic channel components 51 with
The structure of lower anode passages assembly 52 is identical and in the vertical direction is oppositely arranged (as shown in Figure 1 and Figure 2), Anodic passage group
Part 51 each with lower anode passages assembly 52 vertically relative to anode pipe 511,521 in extend through setting same cathode line
531 (as shown in Fig. 2 the overlooking the structure diagrams for the Anodic channel components of plane projection coincidence, lower anode passages assembly),
A plurality of cathode line is parallel to each other and constitutes cathode line group 53, and each described cathode line is electrically connected with High voltage power supply equipment 7, and power supply is introduced
Cleaner unit cavity, each cathode line 531 run through each accordingly vertically relative to Anodic channel components 51 in anode pipe 511 and under
Anode pipe 521 in anode passages assembly 52 and being connected as a single entity up and down；Described classification flusher 6 includes being arranged at Shangyang
The branch shape top spray equipment 61 of pole channel components 51 top and be arranged at Anodic channel components 51 and lower anode passages group
Annular middle part spray equipment 62 between part 52；Branch shape top spray equipment 61 and annular middle part spray equipment 62 respectively with confession
Wetting system (not shown) connects.
The flue gas to be clean of dust-laden enters cleaner unit cavity from smoke inlet section 2, is provided with air-flow and divides in smoke inlet section 2
Fabric swatch 4, can carry out rectification to flue gas, it is to avoid local velocity is uneven, and airflow-distribution board 4 is that the AND DEWATERING FOR ORIFICE STRUCTURE of monolayer is (existing
Technology, as shown in Figure 5), afterwards, flue gas passes sequentially through lower anode passages assembly 52 and Anodic channel components 51, and flue gas is in height
The effect of piezoelectric field power is lower to be ionized, and dust-laden microgranule is charged and to anode apparent motion, is eventually adhering to anode surface and departs from cigarette
Gas, flue gas is discharged from exhanst gas outlet section 3 after being purified.For keeping higher dust-collecting efficiency, need, to anode periodic flushing, to rush
When washing system operation, a large amount of fresh water (FW)s are sprayed by nozzle and wash away anode surface, and dust is with flushing water from smoke inlet section 2 row
Go out.Because flue gas enters cleaner unit cavity from cleaner unit bottom, in one section of run time, lower anode passages assembly 52 will be than upper
Anode passages assembly 51 adsorbs more dust particles, and now annular middle part spray equipment 62 starts, individually to lower anode passages
Assembly 52 is rinsed；Annular middle part spray equipment 62 also can be started with branch shape top spray equipment 61 simultaneously.In the middle part of anode
Rinse current and act directly on anode hypomere, using the less water yield so that it may anode hypomere surface washing is clean, realization is efficiently
Flushing, water-saving purpose.
From the above mentioned, in vertical wet electrical dust precipitator of the present utility model, the anode of electric dust collecting means is divided into Anodic
Channel components and lower anode passages assembly, but cathode line is still connected as a single entity and runs through Anodic channel components and lower anode passages
Assembly, thus, it is possible to reach the dust removing effects of two-stage electric field series connection, investment is substantially less than the structure of two-stage electric field series connection, possesses
Certain cost advantage；Combined to wet using branch shape top spray equipment and annular middle part spray equipment in this utility model
The top of formula electric cleaner, lower area classification are rinsed and are controlled, and anode lower area can be rinsed current and cover comprehensively, increase
Strong developing result, when rinsing every time, anode and cathode surface are properly washed, and eliminate flushing blind area, it is to avoid polar board surface dust stratification
With fouling it is ensured that stable efficiency of dust collection.
As shown in figure 1, cleaner unit cavity is the space providing gas cleaning to process, inside is provided with electric dust collecting means 5 (sun
Pole, negative electrode) and classification flusher 6, the dedusting environment of high voltage electric field is provided；The section of cleaner unit cavity can be rectangle,
Can be circle；The rectangular cross-section of cleaner unit cavity in the present embodiment；In the present embodiment, described cylindrical shell 1, cigarette
Gas entrance 2 and exhanst gas outlet section 3 are all to constitute in corresponding framework inner seal setting sheet material.
As shown in Figure 1 and Figure 2, described Anodic channel components 51 and lower anode passages assembly 52 are respectively by corresponding anode
Framework is fixed in cylindrical shell 1；Anodic channel components 51 are made up of the multiple Anodic channel modules being vertically arranged side by side；
Lower anode passages assembly 52 is also made up of the multiple lower anode passages module being vertically arranged side by side；The module number root being actually needed
Determine according to the exhaust gas volumn processing；It is formed with multiple anode tube contacting with each other and being vertically arranged side by side in each Anodic channel module
Road 511, is formed with multiple anode pipe 521 contacting with each other and being vertically arranged side by side in each lower anode passages module.In this reality
Apply in mode, the section of each anode pipe 511,521 is regular hexagon, the shape such as alternatively circular or square；Flue gas is from each sun
When pole pipe road flows through, the dust carrying is collected in the anode surface of each anode pipe inside circumference；Anodic channel components 51
Positioned at the top of lower anode passages assembly 52, and both plane projection positions overlap, between both keep certain in the height direction
Away from, actual range in the middle part of annular the height of spray equipment 62 meet maintenance needs and determine.
Further, as shown in Fig. 2 in the present embodiment, described Anodic channel components are by four Anodic passage moulds
Block forms, and described lower anode passages assembly is also made up of four lower anode passages modules；Four Anodic channel modules and four
Lower anode passages module is fixed in cylindrical shell 1 by four sashes of the anode superstructure in matrix pattern respectively.
As shown in figure 1, in the present embodiment, the two ends of each described cathode line 531 be individually fixed in cathode frame and
Lower cathode frame；Upper cathode frame and lower cathode frame are suspended in cleaner unit by an external device (ED) (insulator chamber, prior art)
In cavity.
As shown in figure 3, in the present embodiment, described branch shape top spray equipment 61 includes being arranged on a support
Water-supply-pipe 611 and the multiple showers 612 being extended by this water-supply-pipe 611 both sides, each shower 612 is provided with multiple nozzles
613.Nozzle 613 is arranged on the bottom of shower, can cover whole Anodic channel components 51 place plane space during spray；Remove
When dirt device runs, gather after certain dust after anode surface, branch shape top spray equipment 61 starts, nozzle sprays a large amount of current
Cathode line, Anodic channel components 51 are rinsed, for the purpose of cleaning anode surface.
As shown in figure 4, in the present embodiment, described annular middle part spray equipment 62 is arranged in cleaner unit cavity, position
In the side-lower of Anodic channel components 51, it is located above the side of lower anode passages assembly 52, described annular middle part spray simultaneously
Device 62 includes the annular spray pipe road 621 around the setting of cylindrical shell 1 inwall, and this annular spray pipe road 621 is provided with multiple
Nozzle 623；Described nozzle 623 is arranged towards lower anode passages assembly 52.
Further, this annular spray pipe road 621 can also connect setting one is in criss-cross water pipeline 622, this ring
Shape water pipeline 621 constitutes the circular spray tube of corresponding four lower anode passages modules respectively with criss-cross water pipeline 622
Road, makes each circular spray tube road arrange respectively along the surrounding descending anode passages module accordingly；This annular spray pipe road 621
It is provided with multiple nozzles 623 with criss-cross water pipeline 622, nozzle 623 is arranged on duct bottom and has certain inclination angle, described
Nozzle 623 is arranged towards lower anode passages module；After certain dust is gathered on lower anode passages assembly 52 surface, the spray of annular middle part
Shower device 62 starts, and nozzle sprays a large amount of current and above side, lower anode passages assembly 52 is rinsed；Branch shape top is sprayed
Shower device 61 can be run with annular middle part spray equipment 62 simultaneously, also can isolated operation.
In another embodiment of present embodiment, the above-mentioned circular spray tube corresponding to four lower anode passages modules respectively
Road is it is also possible to be made up of four single annulus lines respectively.
Vertical wet electrical dust precipitator of the present utility model and its classification flusher have the advantages that：
1. the vertical wet electrical dust precipitator of this utility model is rinsed and is controlled using top, lower area classification, it is to avoid pole plate
Superficial dust and fouling；
2. this utility model can adjust washing water quantity according to actually used situation and rinse frequency, reach saving wash water
Effect；
3. conventional wet electric dust-collector anode lower area exists and rinses blind area, processes and holds during the higher flue gas of dust content
Easily there is anode surface dust stratification and be difficult to clean off；It is classified the wet electrical dust precipitator of flusher using this utility model, by adjusting
Discharge and initiation culture are rinsed in section middle part, can process the flue gas containing high concentrate dust, and can be always ensured that stable dedusting
Efficiency.
4., although vertical wet type electric dust-collector anode of the present utility model is divided into two parts, cathode line is still connected as a single entity,
The dust removing effects of two-stage electric field series connection can be reached, but investment is substantially less than the structure of two-stage electric field series connection, possesses certain one-tenth
This advantage.
The foregoing is only the schematic specific embodiment of this utility model, be not limited to model of the present utility model
Enclose.Any those skilled in the art, done equivalent change on the premise of without departing from design of the present utility model and principle
Change and modification, the scope of this utility model protection all should be belonged to.
Claims (10)
1. a kind of vertical wet electrical dust precipitator, this vertical wet electrical dust precipitator includes the cylindrical shell being vertically arranged；Its feature exists
In：The bottom of this cylindrical shell is connected with radial dimension smoke inlet section tapered downwards, and the top of this cylindrical shell is connected with
Radial dimension exhanst gas outlet section tapered upwards；It is provided with airflow-distribution board in described smoke inlet section；The chamber of described cylindrical shell
It is provided with electric dust collecting means and classification flusher in vivo；Described electric dust collecting means include the Shangyang being arranged at intervals in cylindrical shell
Pole channel components and lower anode passages assembly, Anodic channel components identical with the structure of lower anode passages assembly and vertically side
Be oppositely arranged upwards, Anodic channel components each with lower anode passages assembly vertically relative to anode pipe in extend through and set
Put same cathode line；Described classification flusher includes being arranged at the branch shape top spray dress above Anodic channel components
Put and be arranged at the annular middle part spray equipment between Anodic channel components and lower anode passages assembly.
2. as claimed in claim 1 vertical wet electrical dust precipitator it is characterised in that：Described Anodic channel components and lower anode
Channel components are fixed in cylindrical shell by corresponding anode superstructure respectively；Anodic channel components are many by be vertically arranged side by side
Individual Anodic channel module composition；Lower anode passages assembly is made up of the multiple lower anode passages module being vertically arranged side by side；On
It is respectively formed with multiple anode pipe contacting with each other and being vertically arranged side by side in anode passages module and lower anode passages module.
3. as claimed in claim 2 vertical wet electrical dust precipitator it is characterised in that：Described Anodic channel components are by four
Anode passages module forms, and described lower anode passages assembly is made up of four lower anode passages modules.
4. the vertical wet electrical dust precipitator as described in claim 1,2 or 3 it is characterised in that：The two ends of each described cathode line are divided
It is not fixed on cathode frame and lower cathode frame；Each described cathode line is electrically connected with High voltage power supply equipment.
5. as claimed in claim 1 vertical wet electrical dust precipitator it is characterised in that：Described branch shape top spray equipment includes
The water-supply-pipe being arranged on a support and the multiple showers being extended by this water-supply-pipe both sides, each shower is provided with multiple
Nozzle.
6. as claimed in claim 1 vertical wet electrical dust precipitator it is characterised in that：Described annular middle part spray equipment includes ring
Around the annular spray pipe road of cylindrical shell inwall setting, this annular spray pipe road is provided with multiple nozzles；Under described nozzle direction
Anode passages assembly is arranged.
7. as claimed in claim 3 vertical wet electrical dust precipitator it is characterised in that：Described annular middle part spray equipment includes ring
Around the annular spray pipe road of cylindrical shell inwall setting, it is in criss-cross water pipeline that this annular spray pipe road connects one, should
Annular spray pipe road constitutes the circular spray tube road of corresponding four lower anode passages modules respectively with criss-cross water pipeline；Should
Annular spray pipe road and criss-cross water pipeline are provided with multiple nozzles；Described nozzle is arranged towards lower anode passages module.
8. a kind of classification flusher for the vertical wet electrical dust precipitator of any one of claim 1～7 it is characterised in that：Institute
State classification flusher to be arranged on inside vertical wet electrical dust precipitator；Described classification flusher includes branch shape top spray dress
Put and annular middle part spray equipment.
9. as claimed in claim 8 classification flusher it is characterised in that：Described branch shape top spray equipment includes arranging
Water-supply-pipe on a support and the multiple showers being extended by this water-supply-pipe both sides, each shower is provided with multiple sprays
Mouth；Described annular middle part spray equipment includes the annular spray pipe road around the setting of cylindrical shell inwall, this annular spray pipe road
It is provided with multiple nozzles.
10. as claimed in claim 8 classification flusher it is characterised in that：Described annular middle part spray equipment includes cincture
The annular spray pipe road of cleaner unit inwall setting, it is in criss-cross water pipeline that this annular spray pipe road connects one, this annular
Water pipeline constitutes four circular spray tube roads with criss-cross water pipeline；This annular spray pipe road and criss-cross sparge pipe
Road is provided with multiple nozzles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620881313.7U CN205949064U (en) | 2016-08-15 | 2016-08-15 | Vertical wet -type electrostatic precipitator and hierarchical washing unit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620881313.7U CN205949064U (en) | 2016-08-15 | 2016-08-15 | Vertical wet -type electrostatic precipitator and hierarchical washing unit thereof |
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| Publication Number | Publication Date |
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| CN205949064U true CN205949064U (en) | 2017-02-15 |
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ID=57974963
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| CN201620881313.7U Active CN205949064U (en) | 2016-08-15 | 2016-08-15 | Vertical wet -type electrostatic precipitator and hierarchical washing unit thereof |
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| CN113453801B (en) * | 2018-10-22 | 2023-12-22 | 上海必修福企业管理有限公司 | Exhaust treatment system and method |
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| CN113474085B (en) * | 2018-10-22 | 2023-12-22 | 上海必修福企业管理有限公司 | Exhaust treatment system and method |
| CN113330195A (en) * | 2018-10-22 | 2021-08-31 | 上海必修福企业管理有限公司 | Engine air intake dust removal system and method |
| CN113423507A (en) * | 2018-10-22 | 2021-09-21 | 上海必修福企业管理有限公司 | Air dust removal system and method |
| CN113453802B (en) * | 2018-10-22 | 2023-12-22 | 上海必修福企业管理有限公司 | Exhaust treatment system and method |
| CN113423507B (en) * | 2018-10-22 | 2023-12-22 | 上海必修福企业管理有限公司 | Air dust removal system and method |
| CN113692317A (en) * | 2019-03-20 | 2021-11-23 | 上海必修福企业管理有限公司 | Method and apparatus for treating low specific resistance substance |
| CN114072236A (en) * | 2019-03-20 | 2022-02-18 | 上海必修福企业管理有限公司 | Method and apparatus for treating low specific resistance substance |
| CN113727781A (en) * | 2019-04-25 | 2021-11-30 | 上海必修福企业管理有限公司 | VOCs gas treatment device and method |
| CN113905826A (en) * | 2019-05-27 | 2022-01-07 | 上海必修福企业管理有限公司 | Electric field device |
| CN114390949A (en) * | 2019-05-27 | 2022-04-22 | 上海必修福企业管理有限公司 | Electric field device and method for reducing electric field coupling |
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