CN114950053A - Chromium plating electroplating waste gas treatment device and method - Google Patents
Chromium plating electroplating waste gas treatment device and method Download PDFInfo
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- CN114950053A CN114950053A CN202210538715.7A CN202210538715A CN114950053A CN 114950053 A CN114950053 A CN 114950053A CN 202210538715 A CN202210538715 A CN 202210538715A CN 114950053 A CN114950053 A CN 114950053A
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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
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- 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
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
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- 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
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
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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
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/82—Solid phase processes with stationary reactants
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/04—Removal of gases or vapours ; Gas or pressure control
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/20—Regeneration of process solutions of rinse-solutions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/025—Other waste gases from metallurgy plants
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Health & Medical Sciences (AREA)
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Abstract
The invention relates to a chromium plating electroplating waste gas treatment device which comprises a chromium plating tank, a waste gas spraying and recycling tower and an alkali absorption tower which are sequentially connected, wherein a first filtering cotton layer, a second filtering cotton layer and a third filtering cotton layer are sequentially arranged in the waste gas spraying and recycling tower, spray pipes are arranged on one sides of the first filtering cotton layer, the second filtering cotton layer and the third filtering cotton layer and are used for distributing spray holes from top to bottom, a spray return pipe is arranged at the bottom of the waste gas spraying and recycling tower and is connected with the chromium plating tank, an absorption layer is arranged in the alkali absorption tower, absorption balls are filled in the absorption layer and comprise metal tennis balls, calcium hydroxide solid particles are filled in the metal tennis balls, an alkali absorption spray pipe is arranged on one side of the absorption layer, and spray heads are distributed in the alkali absorption spray pipe from top to bottom. The removal rate of chromic acid mist by physical filtration of the invention reaches more than 90 percent, and calcium hydroxide solid particles in the metal tennis ball are taken as absorption balls, thereby ensuring that electroplating waste gas can be fully absorbed, ensuring smooth gas and reducing wind resistance.
Description
Technical Field
The invention relates to waste gas treatment, in particular to a chromium plating electroplating waste gas treatment device.
Background
In the chromium plating production process, the working temperature of the plating solution is generally high, and therefore plating waste gas such as a chromic acid mist is volatilized. In order to avoid causing environmental pollution, electroplating waste gas needs to be collected and then is purified and then is discharged after reaching standards.
Disclosure of Invention
The invention aims to provide a chromium plating electroplating waste gas treatment device which can fully absorb chromic acid mist in chromium plating electroplating waste gas.
In order to realize the purpose, the invention adopts the following technical scheme:
the utility model provides a waste gas treatment device is electroplated in chromium plating, including the chromium plating groove that connects gradually, waste gas sprays the recovery tower, alkali absorption tower, waste gas sprays and sets gradually in the recovery tower and filters cotton layer one, filter cotton layer two, filter cotton layer three, filter cotton layer one, one side that filters cotton layer two and filter cotton layer three all is equipped with the shower pipe, the shower pipe is from last to arranging the spray hole down, waste gas sprays the bottom of recovery tower and is equipped with the wet return that sprays, it is connected with the chromium plating groove to spray the wet return, be equipped with the absorbed layer in the alkali absorption tower, the absorption ball is filled in the absorbed layer, the absorption ball includes metal tennis, pack calcium hydroxide solid particle in the metal tennis, one side of absorbed layer is equipped with alkali absorption spray pipe, alkali absorption spray pipe is from last to arranging the atomising head down.
The first filtering cotton layer, the second filtering cotton layer and the third filtering cotton layer are consistent with the longitudinal section of the waste gas spraying recovery tower in size.
The filtering precision of the filtering cotton in the first filtering cotton layer is 100 microns, the filtering precision of the filtering cotton in the second filtering cotton layer is 50 microns, and the filtering precision of the filtering cotton in the third filtering cotton layer is 5 microns.
The diameter of the metal tennis ball is 40-50 mm.
The metal tennis ball is a stainless steel tennis ball.
The particle size of the calcium hydroxide solid particles is 3-5 mm.
And demineralized water is introduced into the spray water pipe.
A treatment method of a chromium plating electroplating waste gas treatment device comprises the following steps:
physical filtration
Electroplating waste gas generated by the chromium plating tank enters a waste gas spraying recovery tower and sequentially passes through a first filtering cotton layer, a second filtering cotton layer and a third filtering cotton layer, wherein the first filtering cotton layer, the second filtering cotton layer and the third filtering cotton layer are periodically sprayed and cleaned by desalted water, the spraying period is 30 seconds every 10-12 hours, and the average daily water spraying amount is 500 plus 600L; the spraying water generated after spraying flows back to the electroplating bath for recycling;
second, alkali absorption filtration
The electroplating waste gas after physical filtration enters an alkali absorption tower, the calcium hydroxide solid particles in the metal mesh balls in the absorption layer are used for alkali absorption, the calcium hydroxide solid particles are periodically humidified by water spray, the spray cycle is to spray for 30-40 seconds every 1-1.5 hours, and the average water spray amount per day is 300-400L.
The conductivity of the desalted water is less than 30 mus/cm.
Compared with the prior art, the invention has the beneficial effects that:
the removal rate of the chromic acid mist by the physical filtration of the invention reaches more than 90 percent, the chromic acid mist physically filtered by the spray absorption tower forms the active ingredients of the electroplating solution again after being washed, and the chromic acid mist flows back to the electroplating bath for reuse, thereby effectively improving the utilization rate of the electroplating solution. The calcium hydroxide solid particles in the metal mesh balls are used as absorption balls, so that the electroplating waste gas can be fully absorbed, the gas can be smoothly flowed, and the wind resistance is reduced. Prevent the unsmooth ventilation caused by pulverization and hardening of calcium hydroxide solid particles. The removal rate of chromic acid mist in the electroplating waste gas can reach more than 98 percent. The electroplating waste gas is discharged after being purified and treated.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a view showing the structure of an absorption ball.
In the figure: the device comprises a chromium plating tank 1, a waste gas spray recovery tower 2, an alkali absorption tower 3, a first filter cotton layer 4, a second filter cotton layer 5, a third filter cotton layer 6, a spray water pipe 7, a spray water return pipe 8, an absorption layer 9, an absorption ball 10, a metal tennis ball 11, calcium hydroxide solid particles 12 and an alkali absorption spray pipe 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the chromium plating electroplating waste gas treatment device comprises a chromium plating tank 1, a waste gas spraying recovery tower 2, an alkali absorption tower 3, and a filtering cotton layer I4, a filtering cotton layer II 5 and a longitudinal section with the size consistent with that of the waste gas spraying recovery tower are sequentially arranged in the waste gas spraying recovery tower 2. The filtering precision of the filtering cotton in the first filtering cotton layer is 100 mu m, the filtering precision of the filtering cotton in the second filtering cotton layer is 50 mu m, and the filtering precision of the filtering cotton in the third filtering cotton layer is 5 mu m.
One side of the first filtering cotton layer 4, the second filtering cotton layer 5 and the third filtering cotton layer 6 is provided with a spray pipe 7, the spray pipes 7 are provided with spray holes from top to bottom, the bottom of the waste gas spray recovery tower 2 is provided with a spray return pipe 8, the spray return pipe 8 is connected with the chromium plating tank 1, an absorption layer 9 is arranged in the alkali absorption tower 3, the absorption layer 9 is filled with absorption balls 10, each absorption ball 10 comprises a metal tennis ball 11, each metal tennis ball 11 is a stainless steel mesh ball, and the diameter of each metal tennis ball 11 is 40-50 mm.
The metal tennis ball 11 is filled with calcium hydroxide solid particles 12, and the particle size of the calcium hydroxide solid particles 12 is 3-5 mm.
One side of the absorption layer 9 is provided with an alkali absorption spray pipe 13, and the alkali absorption spray pipe 13 is provided with spray heads from top to bottom.
Examples
The utility model provides a chromium plating electroplating waste gas treatment device, includes chromium plating groove 1 that connects gradually, waste gas sprays recovery tower 2, alkali absorption tower 3, waste gas sprays and sets gradually in the recovery tower 2 and filters cotton layer one 4, filters cotton layer two 5, filters cotton layer three 6, filters the size of cotton and is 2 mx 0.3m, filters the filter fineness of the filter cotton in the filter cotton layer one and is 100 mu m, filters the filter fineness of the filter cotton in the filter cotton layer two and is 50 mu m, filters the filter fineness of the filter cotton in the filter cotton layer three and is 5 mu m.
One side of the first filtering cotton layer 4, the second filtering cotton layer 5 and the third filtering cotton layer 6 is provided with a spray pipe 7, the spray pipe 7 is provided with spray holes from top to bottom, the bottom of the waste gas spray recovery tower 2 is provided with a spray return pipe 8, the spray return pipe 8 is connected with the chromium plating tank 1, an absorption layer 9 is arranged in the alkali absorption tower 3, the absorption layer 9 is filled with absorption balls 10, the absorption balls 10 comprise stainless steel metal tennis balls 11, and the diameter of the metal tennis balls 11 is 50 mm. The metal tennis ball 11 can be opened and closed, the metal tennis ball 11 is filled with calcium hydroxide solid particles 12, and the particle size of the calcium hydroxide solid particles 12 is 3-5 mm.
One side of the absorption layer 9 is provided with an alkali absorption spray pipe 13, and the alkali absorption spray pipe 13 is provided with spray heads from top to bottom. The first filtering cotton layer 4, the second filtering cotton layer 5 and the third filtering cotton layer 6 are arranged in a through mode from top to bottom.
The treatment method of the chromium plating electroplating waste gas treatment device comprises the steps of carrying out secondary filtration on electroplating waste gas;
physical filtration
Electroplating waste gas generated by the chromium plating bath enters a waste gas spraying recovery tower, and the flow rate of the waste gas is 300m 3 Min, concentration of chromic acid mist in electroplating waste gas is 0.1mg/m 3 Sequentially passing through a first filtering cotton layer, a second filtering cotton layer and a third filtering cotton layer, wherein the first filtering cotton layer, the second filtering cotton layer and the third filtering cotton layer are sprayed by desalted water for a period of 30 seconds every 12 hours, and the average daily water spraying amount isIs 500L; the index of the desalted water is 20 mu s/cm, the removal rate of chromic acid mist by physical filtration reaches more than 90%, and spray water generated after spraying flows back to the electroplating bath for recycling.
Secondly, alkali absorption and filtration
The electroplating waste gas after physical filtration enters an alkali absorption tower, the calcium hydroxide solid particles in the metal mesh balls in the absorption layer are used for alkali absorption, the calcium hydroxide solid particles are subjected to water spraying humidification, the calcium hydroxide solid particles are wetted, no water is accumulated, the spraying period is 30 seconds every 1 hour, and the average daily water spraying amount is 300L. The chemical reaction equation of the calcium hydroxide for absorbing the chromic acid mist is as follows: h 2 CrO 4 +Ca(OH) 2 ＝CaCrO 4 +2H 2 O, concentration of chromic acid mist after alkali absorption and filtration is lower than 0.001mg/m 3 . The calcium hydroxide solid particles in the metal mesh balls are used as absorption balls, so that the electroplating waste gas can be fully absorbed, the gas smoothness can be ensured, and the wind resistance is reduced. Prevent the unsmooth ventilation caused by pulverization and hardening of calcium hydroxide solid particles.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a waste gas treatment device is electroplated in chromium plating, which comprises a chromium plating groove that connects gradually, waste gas sprays the recovery tower, the alkali absorption tower, waste gas sprays and sets gradually in the recovery tower and filters cotton layer one, filter cotton layer two, filter cotton layer three, filter cotton layer one, one side of filtering cotton layer two and filtering cotton layer three all is equipped with the shower pipe, the shower pipe is from last to arranging the shower hole down, waste gas sprays the bottom of recovery tower and is equipped with the spray wet return, the spray wet return is connected with the chromium plating groove, be equipped with the absorption layer in the alkali absorption tower, pack the absorption ball in the absorption layer, the absorption ball includes metal tennis, pack calcium hydrate solid particle in the metal tennis, one side of absorption layer is equipped with alkali absorption spray pipe, alkali absorption spray pipe is from last to arranging the atomising head down.
2. The chromium plating electroplating waste gas treatment device according to claim 1, wherein the first filtering cotton layer, the second filtering cotton layer and the third filtering cotton layer are consistent with the longitudinal section of the waste gas spray recovery tower in size.
3. The device for treating waste gas from electroplating with chrome plating according to claim 1, wherein the filtration precision of the filter cotton in the first filter cotton layer is 100 μm, the filtration precision of the filter cotton in the second filter cotton layer is 50 μm, and the filtration precision of the filter cotton in the third filter cotton layer is 5 μm.
4. The apparatus as claimed in claim 1, wherein said metal tennis ball has a diameter of 40-50 mm.
5. The apparatus as claimed in claim 1, wherein said metal tennis ball is a stainless tennis ball.
6. The apparatus for treating waste gas from electroplating with chromium plating according to claim 1, wherein the particle size of said calcium hydroxide solid particles is 3-5 mm.
7. The chromium plating electroplating waste gas treatment device as claimed in claim 1, wherein the spray header is fed with demineralized water.
8. The chromium plating exhaust gas treatment device treatment method as recited in claim 1, comprising:
physical filtration
Electroplating waste gas generated by the chromium plating tank enters a waste gas spraying recovery tower and sequentially passes through a first filtering cotton layer, a second filtering cotton layer and a third filtering cotton layer, wherein the first filtering cotton layer, the second filtering cotton layer and the third filtering cotton layer are periodically sprayed and cleaned by adopting demineralized water, the spraying period is 30 seconds every 10-12 hours, and the average daily water spraying amount is 500-600L; the spraying water generated after spraying flows back to the electroplating bath for recycling;
secondly, alkali absorption and filtration
The electroplating waste gas after physical filtration enters an alkali absorption tower, the calcium hydroxide solid particles in the metal mesh balls in the absorption layer are used for alkali absorption, the calcium hydroxide solid particles are periodically humidified by water spray, the spray cycle is to spray for 30-40 seconds every 1-1.5 hours, and the average water spray amount per day is 300-400L.
9. The chromium plating electroplating effluent treatment plant processing method as claimed in claim 8, wherein the conductivity of the demineralized water is less than 30 μ s/cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210538715.7A CN114950053A (en) | 2022-05-18 | 2022-05-18 | Chromium plating electroplating waste gas treatment device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210538715.7A CN114950053A (en) | 2022-05-18 | 2022-05-18 | Chromium plating electroplating waste gas treatment device and method |
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| CN114950053A true CN114950053A (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210538715.7A Pending CN114950053A (en) | 2022-05-18 | 2022-05-18 | Chromium plating electroplating waste gas treatment device and method |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4301128A (en) * | 1979-03-16 | 1981-11-17 | F. L. Smidth & Co. | Method for purification of gases |
| CN201347466Y (en) * | 2009-01-22 | 2009-11-18 | 上海科德轧辊表面处理有限公司 | Electroplating exhaust purification processing device |
| CN102872693A (en) * | 2011-07-10 | 2013-01-16 | 台澳铝业（台山）有限公司 | Processing method of waste nitric acid fume and device thereof |
| CN106039937A (en) * | 2016-06-01 | 2016-10-26 | 广州益方田园环保股份有限公司 | Waste gas absorption tower and waste gas absorption method |
| CN206325390U (en) * | 2016-12-30 | 2017-07-14 | 天津滨港电镀企业管理有限公司 | A kind of plating industrial district large insulation waste gas tower |
| CN107032471A (en) * | 2015-08-12 | 2017-08-11 | 雅旌智能科技(上海)有限公司 | A kind of calcium carbonate, calcium hydroxide composite filter element and its method for preparing alkalescent water |
| CN109289759A (en) * | 2018-11-23 | 2019-02-01 | 张少强 | The integrating device of solid base adsorbent and synchronization process sour gas and organic exhaust gas |
| CN209093096U (en) * | 2018-11-03 | 2019-07-12 | 杭州众欣环保科技有限公司 | A kind of acid mist waste gas purification alkali ball eddy flow tower |
| CN110772913A (en) * | 2019-09-30 | 2020-02-11 | 广州紫科环保科技股份有限公司 | Waste gas treatment device |
| CN210145818U (en) * | 2019-03-05 | 2020-03-17 | 深圳市利源水务设计咨询有限公司 | Deodorizing absorption tower with composite function |
| CN213101295U (en) * | 2020-07-21 | 2021-05-04 | 浙江坤搏环保科技有限公司 | Double-tower structure of waste gas tower |
| CN114452799A (en) * | 2021-12-24 | 2022-05-10 | 太仓市宇格明叶环保设备有限公司 | Efficient purification washing tower system based on acid-base waste gas treatment and working method thereof |
| CN217567971U (en) * | 2022-05-18 | 2022-10-14 | 鞍山科德轧辊表面处理有限公司 | Chromium plating electroplating waste gas treatment device |
-
2022
- 2022-05-18 CN CN202210538715.7A patent/CN114950053A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4301128A (en) * | 1979-03-16 | 1981-11-17 | F. L. Smidth & Co. | Method for purification of gases |
| CN201347466Y (en) * | 2009-01-22 | 2009-11-18 | 上海科德轧辊表面处理有限公司 | Electroplating exhaust purification processing device |
| CN102872693A (en) * | 2011-07-10 | 2013-01-16 | 台澳铝业（台山）有限公司 | Processing method of waste nitric acid fume and device thereof |
| CN107032471A (en) * | 2015-08-12 | 2017-08-11 | 雅旌智能科技(上海)有限公司 | A kind of calcium carbonate, calcium hydroxide composite filter element and its method for preparing alkalescent water |
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| CN206325390U (en) * | 2016-12-30 | 2017-07-14 | 天津滨港电镀企业管理有限公司 | A kind of plating industrial district large insulation waste gas tower |
| CN209093096U (en) * | 2018-11-03 | 2019-07-12 | 杭州众欣环保科技有限公司 | A kind of acid mist waste gas purification alkali ball eddy flow tower |
| CN109289759A (en) * | 2018-11-23 | 2019-02-01 | 张少强 | The integrating device of solid base adsorbent and synchronization process sour gas and organic exhaust gas |
| CN210145818U (en) * | 2019-03-05 | 2020-03-17 | 深圳市利源水务设计咨询有限公司 | Deodorizing absorption tower with composite function |
| CN110772913A (en) * | 2019-09-30 | 2020-02-11 | 广州紫科环保科技股份有限公司 | Waste gas treatment device |
| CN213101295U (en) * | 2020-07-21 | 2021-05-04 | 浙江坤搏环保科技有限公司 | Double-tower structure of waste gas tower |
| CN114452799A (en) * | 2021-12-24 | 2022-05-10 | 太仓市宇格明叶环保设备有限公司 | Efficient purification washing tower system based on acid-base waste gas treatment and working method thereof |
| CN217567971U (en) * | 2022-05-18 | 2022-10-14 | 鞍山科德轧辊表面处理有限公司 | Chromium plating electroplating waste gas treatment device |
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