CN108579287B - A kind of cloud and mist formula air cleaning unit - Google Patents
A kind of cloud and mist formula air cleaning unit Download PDFInfo
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- CN108579287B CN108579287B CN201810315190.4A CN201810315190A CN108579287B CN 108579287 B CN108579287 B CN 108579287B CN 201810315190 A CN201810315190 A CN 201810315190A CN 108579287 B CN108579287 B CN 108579287B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
Abstract
The present invention provides a kind of cloud and mist formula air cleaning units, and cloud and mist primary mixing stage, the interior second level mixing section for setting partition group, the interior jet segment for setting rotating jet spout, the interior three-level mixing section for setting cloud and mist suction line and the deposition section of multiple cloud and mist entrances are equipped with including water tank, blower, mist generator and the converging transition being sequentially communicated, the side wall for accommodating water；It deposits and is equipped with rod-type electrode and TiO in section2Coating, the bottom for depositing section are equipped with inlet, deposit the distal opening of section；The present invention designs each mixing section using fluid flow principals, the flow behavior of integrated application wall-attached jet, rotating jet, realize that cloud and mist is automatically drawn into, it is abundant to guarantee that fine particle and the collision of cloud and mist droplet, coalescence, aggregation procedure in air-flow act on, promote the formation of the drop containing particulate matter of larger size, and deposits recycling under electrostatic force.PM2.5 removal efficiency of the present invention is high, and low energy consumption, water consumption is few, compact-sized, convenient for the transformation of existing ventilating system.
Description
Technical field
The present invention relates to air purification field more particularly to a kind of cloud and mist formula air cleaning units.
Background technique
In recent years, haze weather market occurs, and fine particle PM2.5 long-term suspension is in air, and large specific surface area, easily
In adsorpting aggregation virus and bacterium.PM2.5, which enters, easily forms deposition after human body alveolar, cause respiratory disease.Conventional dedusting
Effective trapping of particle of the partial size greater than 10 microns may be implemented in equipment, and to 0.1~2.5 micron of fine particle, often incapability is
Power.
To solve this problem, most of air cleaning unit improves the capture rate of fine particle using water mists.However
Water mists adsorbing and trapping fine particle is merely utilized, still has the escape of quite a few fine particle, and water consumption is big, needs to match
Sewage-treatment plant is covered, such as patent US6488269 " Wet scrubber " wet scrubber, " air is net by CN2013106575385
Makeup is set ".In recent years, using ultrasonic atomizatio principle, fine size droplet diameter, the coalescence for strengthening polluted gas and liquid mist was reunited
Journey has obtained the concern of some scholars.Patent CN201610803531 " a kind of exhaust gas processing device and processing method " is using super
Sound atomizer makes 20 microns of size droplet diameter, strengthens the collision reunion speed of drop and fine particle using acoustic agglomeration
Rate, since acoustic agglomeration energy consumption is excessively high, the mechanism of action is clear not enough, and apart from practical application, there are also a distances.Chinese patent
CN201520441267 " cloud formula dust pelletizing system " is provided with liquid mist generator, particle vitellarium and cloud formula dust-extraction unit, ash-laden gas
Stream mixed with liquid mist slowly, dust-contained airflow speed is smaller, and package unit is more complicated, and structure size is big, promotion and application by
To limitation.
Summary of the invention
In response to the deficiencies in the existing technology, the present invention provides a kind of cloud and mist formula air cleaning units, are suitable for interior
The fine particle efficient removal device of fresh air system, forming size droplet diameter using piezoelectric-type ultrasonic atomizer is 5 microns
Superfine spray is analyzed based on fluid flow principals, the spy hit in conjunction with air-flow wall-attached jet, Rotating Gas Jets and air-flow
Property, strengthen fine particle coalescence aggregation procedure, improve fine particle coalescence reunion rate, organically combines Electrostatic Absorption technology and water
Film trapping technique completes the efficient removal of fine particle, provides clean, pure and fresh air for interior.
The present invention achieves the above technical objects by the following technical means.
A kind of cloud and mist formula air cleaning unit, including the water tank for accommodating water, blower, converging transition, the mixing of cloud and mist primary
Section, second level mixing section, jet segment, three-level mixing section, deposition section, cloud and mist suction line, mist generator；
The mist generator is located in water tank, and positioned at the water surface hereinafter, the opposite two side walls upper end of the water tank
It is respectively equipped with the left outlet of cloud and mist and the right outlet of cloud and mist；
The blower is set to the inlet of converging transition, and the outlet of the converging transition and cloud and mist primary mixing stage, second level are mixed
It closes section, jet segment, three-level mixing section and deposition section is sequentially communicated and coaxial line, the side wall of the cloud and mist primary mixing stage are equipped with
Multiple cloud and mist entrances, the cloud and mist entrance and the left outlet of cloud and mist；
Partition group is equipped in the second level mixing section pipeline section, the partition group includes the left-handed partition being arranged alternately and dextrorotation
Partition, the left-handed partition and dextrorotation partition successively weld bunchiness, are equipped with rotating jet spout, the rotation in the jet segment
The injection direction of efflux nozzle is directed at three-level mixing section, and cloud and mist suction line, the cloud and mist sucking are equipped in the three-level mixing section
Pipe and the right outlet of cloud and mist, the deposition section is interior to be equipped with rod-type electrode, deposits and is coated with TiO on section inner wall2Coating, the rod-type
Electrode is electrically connected with negative high voltage electrostatic generator, and the bottom of the deposition section is equipped with inlet, the distal opening of the deposition section.
Preferably, multiple cloud and mist entrances are circumferentially evenly distributed on cloud centered on the axis of cloud and mist primary mixing stage
On mist primary mixing stage.
Preferably, the number of the cloud and mist entrance is four.
Preferably, further include fluid level controller, solenoid valve, the low liquid level inductor for measuring low water level in water tank, use
In the high liquid level inductor of high water level in measurement water tank, the low liquid level inductor and high liquid level inductor are installed on the outer of water tank
On wall, the solenoid valve is connected to the water inlet at water source and water tank, the solenoid valve, low liquid level inductor and high liquid level by water pipe
Inductor is electrically connected with fluid level controller, the signal that fluid level controller is fed back according to low liquid level inductor and high liquid level inductor
Control the opening and closing of solenoid valve.
It preferably, further include buoy, the mist generator is pasted on buoy, and buoy is suspended in inside the water of water tank.
Preferably, the mist generator is apart from 1~2cm of the water surface.
Preferably, the both ends in the deposition section are equipped with rod-type electrode supporting seat, and the rod-type electrode supporting seat includes
Large circle, the small circle ring concentric with large circle and the multiple brackets for connecting large circle and small circle ring, multiple brackets are along big
Annulus is arranged radially, and groove is arranged at small circle ring center, the both ends of the rod-type electrode are separately mounted to the groove of small circle ring
It is interior.
Preferably, rod-type electrode supporting seat is made of polytetrafluoroethylene (PTFE).
Beneficial effects of the present invention:
1) present invention designs each mixing section, the stream of integrated application wall-attached jet, rotating jet using fluid flow principals
Dynamic characteristic realizes being automatically drawn into for cloud and mist, and the fine particle and cloud and mist droplet interaction process in guarantee air-flow are abundant, promotees
Make the formation of the drop containing particulate matter of larger size.
2) present invention applies negative high voltage electrostatic field, by the TiO of the whole guiding deposition pipeline section inner wall of drop containing fine particle2
Coating utilizes TiO2Water-wet behavior, further ensure that rod-type pole drying dripless is soaked, realize whole device for a long time
Effectively operation.
3) low energy consumption, water consumption is few by the present invention, and design is rationally, compact-sized, convenient for the transformation of existing ventilating system.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of cloud and mist formula air cleaning unit of the present invention.
Fig. 2 is the structural schematic diagram of water tank of the present invention.
Fig. 3 is the structural schematic diagram of rod-type electrode of the present invention.
In figure: 1. fluid level controllers；2. solenoid valve；3. water tank；4. blower；5. converging transition；6. cloud and mist entrance；7. attached wall is penetrated
Stream；8. cloud and mist primary mixing stage；9. left-handed partition；10. dextrorotation partition；11. threaded sleeve；12. rotating jet spout；13. cloud
Mist suction line；14. rod-type electrode；15.TiO2Coating；16. inlet；17. rod-type electrode supporting seat；18. low liquid level inductor；
19. mist generator；20. high liquid level inductor；21. the left outlet of cloud and mist；22. the right outlet of cloud and mist；23. buoy；24. water inlet.
Specific embodiment
Present invention will be further explained with reference to the attached drawings and specific examples, but protection scope of the present invention is simultaneously
It is without being limited thereto.
As shown in Figure 1, a kind of cloud and mist formula air cleaning unit of the present invention, including water tank 3, the wind for accommodating water
Machine 4, converging transition 5, cloud and mist primary mixing stage 8, second level mixing section, jet segment, three-level mixing section, deposition section, cloud and mist suction line 13,
Mist generator 19, fluid level controller 1, solenoid valve 2, the low liquid level inductor 18 for measuring low water level in water tank 3, for surveying
The high liquid level inductor 20 of high water level in water-masuring box 3.
As shown in Fig. 2, mist generator 19 is pasted on buoy 23, buoy 23 is suspended in inside the water of water tank 3, cloud and mist hair
Raw device 19 is apart from 1~2cm of the water surface.The opposite two side walls upper end of water tank 3 is respectively equipped with the left outlet 21 of cloud and mist and the cloud and mist right side goes out
Mouth 22, low liquid level inductor 18 and high liquid level inductor 20 are adopted the method to fasten with glue and are installed on the outer wall of water tank 3, electromagnetism
Valve 2 is connected to the water inlet 24 at water source and water tank 3, the solenoid valve 2, low liquid level inductor 18 and high liquid level inductor by water pipe
20 are electrically connected with fluid level controller 1, and fluid level controller 1 is fed back according to low liquid level inductor 18 and high liquid level inductor 20
The opening and closing of signal control solenoid valve 2.
Blower 4 is set to the inlet of converging transition 5, blower 4, converging transition 5, cloud and mist primary mixing stage 8 one end successively weld
It connects, the other end, second level mixing section, jet segment, three-level mixing section and the deposition section of cloud and mist primary mixing stage 8 successively utilize thread bush
The link of pipe 11 and coaxial line, the side wall of cloud and mist primary mixing stage 8 are equipped with multiple cloud and mist entrances 6, cloud and mist entrance in the present embodiment
6 number is four, and four cloud and mist entrances 6 are circumferentially evenly distributed on cloud and mist centered on the axis of cloud and mist primary mixing stage 8
On primary mixing stage 8, it is ensured that do not destroy the axial symmetry of wall-attached jet 7, cloud and mist entrance 6 is connected to the left outlet 21 of cloud and mist.
Partition group is equipped in second level mixing section pipeline section, the partition group includes alternating left-handed partition 9 and the right side of setting
Partition 10 is revolved, left-handed partition 9 and dextrorotation partition 10 successively weld bunchiness, and the both ends of partition group are left-handed partition 9, both ends
Left-handed partition 9 is welded with second level mixing section tube wall respectively, and rotating jet spout 12, the rotating jet are equipped in the jet segment
The injection direction of spout 12 is directed at three-level mixing section, is equipped with cloud and mist suction line 13, cloud and mist suction line 13 in the three-level mixing section
It is fixed with three-level mixing section pipeline section weld connection, cloud and mist suction line 13 is connected to the right outlet 22 of cloud and mist, is equipped with rod-type in deposition section
Electrode 14, the inner wall for depositing section are equipped with TiO2Coating 15, the both ends deposited in section are equipped with rod-type electrode supporting seat 17, such as
Shown in Fig. 3, the rod-type electrode support seat 17 include large circle, the small circle ring concentric with large circle and connect large circle and
Groove, the rod-type electricity is arranged in multiple brackets of small circle ring, the multiple bracket being arranged radially along large circle, small circle ring center
The both ends of pole 14 respectively be mounted in the groove at small circle ring center.The both ends of the rod-type electrode 14 respectively with two small circle rings
Transition fit.In the present embodiment, rod-type electrode supporting seat 17 is made of polytetrafluoroethylene (PTFE).Rod-type electrode 14 and negative high voltage electrostatic
Generator electrical connection, the bottom of the deposition section are equipped with inlet 16, the distal opening of the deposition section.
In use, connecting fluid level controller 1,2 power supply of solenoid valve, it is true that automatic water-supplying tank 3 adds water to high liquid level inductor 20
Fixed water level opens 19 power supply of mist generator, starts to generate cloud and mist, later, opens blower 4, the air-flow containing fine particle exists
It is successively mixed by converging transition 5, cloud and mist primary mixing stage 8, the interior second level for having left-handed partition 9, dextrorotation partition 10 under the blowing of blower 4
Close section, the jet segment with rotating jet spout 12, the three-level mixing section of built-in cloud and mist suction line 13 and deposition section.
The course of work of the invention is using fluid flow principals, in conjunction with flow dynamics analysis, integrated application wall-attached jet 7
Negative pressure, rotating jet formation negative pressure are formed, cloud and mist is automatically into corresponding mixation tube section, left-handed partition 9 and dextrorotation partition 10
Interval setting, comes into full contact with dust-contained airflow with cloud and mist, and promote the formation of swirling eddy.In three-level mixing section, fine grained
Object and Water vapor condensation are collided with droplet, form drop containing fine particle, into the effect deposited after pipeline section in electrostatic force
Lower deposition recycling.
Specifically, the dust-contained airflow that blower 4 is blown out forms gas jet after the acceleration of converging transition 5 and enters the mixing of cloud and mist primary
Section 8, the attached wall after a small distance form wall-attached jet 7.Meanwhile mist generator 19 generates the small liquid of 5 microns
Drop forms dry fog.Pressure is subatmospheric in this partial volume in cloud and mist primary mixing stage 8, before the attached wall of jet stream, in pressure
Under the action of difference, the cloud and mist that mist generator 19 generates is automatically drawn into cloud and mist primary mixing stage, is inhaled and is made due to the volume of jet stream
With cloud and mist is inhaled into gas, mixes for the first time with the intracorporal fine particle completion of gas, coalescence, reunion.Later, cloud and mist, dusty gas
Into second level mixing section, left-handed partition 9, dextrorotation partition 10 guidance under, cloud and mist, dusty gas mixes again.Cloud and mist, dust-laden
Gas mixture flows through the left-handed partition 9 of afterbody in partition group and forms swirling eddy from the ejection of rotating jet spout 12, three
It is still swirling eddy in grade mixing section, and swirling eddy center pressure is subatmospheric, i.e., is formed about negative pressure in axial line,
Cloud and mist is set to enter three-level mixing section, the again mixing of strengthening airflow and cloud and mist, coalescence, reunion through cloud and mist suction line 13 using pressure difference
Process.
The size droplet diameter that mist generator 19 is formed is less than 5 microns, since evaporation forms humidity supersaturated environments.In
In the mixed process of cloud and mist and gas, saturated steam is liquefied using dust particles as the nuclei of condensation and is attached to dust particles surface,
So that dust particles partial size constantly increases.During this, the hydrophily of dust particles is not only improved, and increases dust
Volume and weight, reduce fluid drag, increase substantially the arresting efficiency of fine particle.In addition, in supersaturation water steam
Drop and dust mix by three-level, occur the microphysical processes such as to merge, reunite, further improve cloud and mist and trap fine grained
The ability of object.
In deposition section, rod-type electrode 14 is connected with negative high voltage electrostatic generator, with TiO2Negative height is formed between coating 15
Press electrostatic field.Since Water vapor condensation or collision are reunited, the drop containing fine particle is often with negative electrical charge, in electrostatic force
Under effect, the droplet deposition containing fine particle is in TiO2On coating 15.Due to TiO2Coating 15 itself has hydrophily, and drop touches
It after touching its surface, uniformly sprawls, and slowly flows to the bottom of deposition section along insides of pipes wall surface, collect sewage through inlet 16,
It is dripped directly down from the round wall surface of deposition section without having drop, thereby guarantees that rod-type electrode 14 will not be by dust-laden drop
It soaks and charged effect is caused to decline, the final sedimentation for influencing the drop containing fine particle removes the clean gas of fine particle
From the right end outflow of deposition section.
After the present invention runs a period of time, when water level decreasing to low liquid level 18 position of inductor in water tank 3, by liquid level
Controller 1 controls solenoid valve 2 and opens, and starts 3 moisturizing of feed-tank, and the water level in water tank 3 rises to 20 position of high liquid level inductor
When, fluid level controller 1 controls solenoid valve 2 and closes, and stops 3 moisturizing of feed-tank.When needing to close cloud and mist formula air of the present invention
When purification device, mist generator 19, blower 4, negative high voltage electrostatic generator are successively closed, disconnects fluid level controller 1, solenoid valve
2 power supplys.
The mixing arrangement of cloud and mist and air-flow in the present invention, for the precipitation equipment of the drop containing fine particle, be respectively provided with
In ventilation shaft, not additional external device, structure is simple, varies without the main body pipeline cloth of existing indoor ventilation system
It sets.
The embodiment is a preferred embodiment of the present invention, but present invention is not limited to the embodiments described above, not
In the case where substantive content of the invention, any conspicuous improvement that those skilled in the art can make, replacement
Or modification all belongs to the scope of protection of the present invention.
Claims (8)
1. a kind of cloud and mist formula air cleaning unit, which is characterized in that including the water tank (3), blower (4), tapered for accommodating water
Section (5), cloud and mist primary mixing stage (8), second level mixing section, jet segment, three-level mixing section, deposition section, cloud and mist suction line (13), cloud
Fog generator (19)；
The mist generator (19) is located in water tank (3), and positioned at the water surface hereinafter, opposite two side of the water tank (3)
Wall upper end is respectively equipped with the left outlet (21) of cloud and mist and the right outlet (22) of cloud and mist；
The blower (4) is set to the inlet of converging transition (5), the outlet of the converging transition (5) and cloud and mist primary mixing stage
(8), second level mixing section, jet segment, three-level mixing section and deposition section are sequentially communicated and coaxial line, the cloud and mist primary mixing stage
(8) side wall is equipped with multiple cloud and mist entrances (6), and the cloud and mist entrance (6) is connected to the left outlet (21) of cloud and mist；
Partition group is equipped in the second level mixing section pipeline section, the partition group includes the left-handed partition (9) being arranged alternately and dextrorotation
Partition (10), the left-handed partition (9) and dextrorotation partition (10) successively weld bunchiness, are equipped with rotating jet in the jet segment and spray
Mouth (12), the injection direction of the rotating jet spout (12) are directed at three-level mixing section, are equipped with cloud and mist in the three-level mixing section
Suction line (13), the cloud and mist suction line (13) are connected to the right outlet (22) of cloud and mist, and rod-type electrode is equipped in the deposition section
(14), the inner wall for depositing section is equipped with TiO2Coating (15), the rod-type electrode (14) are electrically connected with negative high voltage electrostatic generator,
The bottom of the deposition section is equipped with inlet (16), the distal opening of the deposition section.
2. cloud and mist formula air cleaning unit according to claim 1, which is characterized in that multiple cloud and mist entrances (6) with
It is circumferentially evenly distributed on centered on the axis of cloud and mist primary mixing stage (8) on cloud and mist primary mixing stage (8).
3. cloud and mist formula air cleaning unit according to claim 1, which is characterized in that the number of the cloud and mist entrance (6)
It is four.
4. cloud and mist formula air cleaning unit according to claim 1, which is characterized in that further include fluid level controller (1), electricity
Magnet valve (2), the low liquid level inductor (18) for measuring water tank (3) interior low water level, the height for measuring water tank (3) interior high water level
Level sensor (20), the low liquid level inductor (18) and high liquid level inductor (20) are installed on the outer wall of water tank (3), institute
State the water inlet (24) that solenoid valve (2) is connected to water source and water tank (3) by water pipe, the solenoid valve (2), low liquid level inductor
(18) it is electrically connected with fluid level controller (1) with high liquid level inductor (20), fluid level controller (1) is according to low liquid level inductor
(18) and high liquid level inductor (20) feedback signal control solenoid valve (2) opening and closing.
5. cloud and mist formula air cleaning unit according to claim 1, which is characterized in that further include buoy (23), the cloud
Fog generator (19) is pasted on buoy (23), and buoy (23) is suspended in inside the water of water tank (3).
6. cloud and mist formula air cleaning unit according to claim 5, which is characterized in that mist generator (19) distance
1~2cm of the water surface.
7. cloud and mist formula air cleaning unit according to claim 1, which is characterized in that the both ends installation in the deposition section
Have a rod-type electrode supporting seat (17), the rod-type electrode supporting seat (17) include large circle, the small circle ring concentric with large circle with
And multiple brackets of connection large circle and small circle ring, the multiple bracket being arranged radially along large circle set at small circle ring center
Groove is set, the both ends of the rod-type electrode (14) are separately mounted in the groove of small circle ring.
8. cloud and mist formula air cleaning unit according to claim 7, which is characterized in that rod-type electrode supporting seat (17) uses
Polytetrafluoroethylene (PTFE) is made.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810315190.4A CN108579287B (en) | 2018-04-10 | 2018-04-10 | A kind of cloud and mist formula air cleaning unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810315190.4A CN108579287B (en) | 2018-04-10 | 2018-04-10 | A kind of cloud and mist formula air cleaning unit |
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| Publication Number | Publication Date |
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| CN108579287A CN108579287A (en) | 2018-09-28 |
| CN108579287B true CN108579287B (en) | 2019-11-05 |
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ID=63621385
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810315190.4A Active CN108579287B (en) | 2018-04-10 | 2018-04-10 | A kind of cloud and mist formula air cleaning unit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113144809B (en) * | 2020-01-07 | 2022-06-21 | 江苏大学 | Vortex street type cloud and mist air purification device |
| CN113634070B (en) * | 2021-10-14 | 2021-12-14 | 新沂市沂兰绿色材料产业研究院有限公司 | Manual cloud forming device with degerming function and based on cloud type dust removal technology |
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| CN2553893Y (en) * | 2002-06-21 | 2003-06-04 | 徐进 | Cyclone water spray electrostatic dust separator |
| CN101439259A (en) * | 2008-12-04 | 2009-05-27 | 江汉大学 | Honeycomb-shaped Venturi dedusting and desulphurization washer |
| CN102059045A (en) * | 2010-11-22 | 2011-05-18 | 浙江富春江环保热电股份有限公司 | Venturi atomization compound wet type electrostatic flue gas treatment reactor |
| CN205064400U (en) * | 2015-10-10 | 2016-03-02 | 中冶南方工程技术有限公司 | Ejector and draw system of penetrating for dirty gas |
| CN106731512A (en) * | 2015-11-23 | 2017-05-31 | 李荣亮 | Desulfurization regenerating ejector |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB787120A (en) * | 1955-03-04 | 1957-12-04 | Belge Prat Daniel Soc | Process and apparatus for washing gases |
| CN2553893Y (en) * | 2002-06-21 | 2003-06-04 | 徐进 | Cyclone water spray electrostatic dust separator |
| CN101439259A (en) * | 2008-12-04 | 2009-05-27 | 江汉大学 | Honeycomb-shaped Venturi dedusting and desulphurization washer |
| CN102059045A (en) * | 2010-11-22 | 2011-05-18 | 浙江富春江环保热电股份有限公司 | Venturi atomization compound wet type electrostatic flue gas treatment reactor |
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