CN107376592A - A kind of chromium plating fog recovery and treatment method - Google Patents
A kind of chromium plating fog recovery and treatment method Download PDFInfo
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- CN107376592A CN107376592A CN201710561699.2A CN201710561699A CN107376592A CN 107376592 A CN107376592 A CN 107376592A CN 201710561699 A CN201710561699 A CN 201710561699A CN 107376592 A CN107376592 A CN 107376592A
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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
- B01D53/002—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 by condensation
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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
- B01D47/04—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour through foam
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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
- B01D53/14—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 by absorption
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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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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation Of Particles Using Liquids (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a kind of chromium plating fog recovery and treatment method, caused mist of chromic acid in plating production process is sucked in the recycling unit of series connection step by step through notch fan housing by pure physical method, through spreading, colliding, coring, cohesion, the process such as sedimentation, so as to which intercepted, absorption is in baffler and packing material surface, it is recycled to through interval and circulation flushing in this grade of collecting tank, so as to reach the interception capture to mist of chromic acid and recycle, whole non-wastewater discharge realizes that chromium plating waste gas meets the purpose of environment protection emission.
Description
Technical field
The present invention relates to a kind of chromium plating fog recovery and treatment method, the technology for belonging to the recovery processing technique of chromium plating waste gas is led
Domain.
Background technology
Chromium plating is one of plating being most widely used in electroplating industry.Chrome plating can assign metal material excellent corrosion resistant
Erosion, abrasion resistance properties and relatively low coefficient of friction.Feature chromium plating can more make material surface obtain bright, hard, fastness and
The good characteristics such as wear-corrosion resistance, therefore, electrodeposited chromium have been widely used in as a process of surface treatment technology
Hardware, electromechanics, the industry such as protection of automobile and Aero-Space critical mechanical piece surface.
In plating production, due to that when caused hydrogen largely escapes on negative electrode, chromic acid meagre profit can be taken out of, so as to form chromium
Acid mist.Taking out of for chromium mist can cause chromic acid amount loss up to 30% or so, and seriously pollute environment.At present, to the processing of chromium mist
Method, which has, is directly passed through the outlet in pumping wind pipe road in screw clamp, makes the chromium mist from chrome-plating plant out soluble in water, so
Method not only need very powerful blower fan, and also to there is waste gas to be discharged in air during long-term production, influence ring around
Border；In addition, the waste water of dissolving chromium mist also needs to be handled.Still an alternative is that chromium mist is reclaimed, with filled with modeling
The chromium mist payoff period of material grid ball is collected to chromium mist, and chromium mist recover there are problems with：1st, chromium mist recover is only
Recycling to chromium mist is realized using the plastic grid ball of fixed filling, the time, slightly long chromium mist can be tied on plastic grid ball
Dirt, the aperture of plastic grid ball is progressively blocked, causes windage to increase, poor processing effect；2nd, chromium mist recover maintenance difficulties are big, behaviour
Make difficult in maintenance.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of chromium plating fog recovery and treatment method, net using multistage recovery
Change room and physics interception is carried out to the chromium mist in chrome-plating bath, realize whole non-wastewater discharge, be not required to the chromium plating fog of manual maintenance
Reclaiming clean processing method.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of chromium plating fog recovery and treatment method,
Mist of chromic acid in chrome-plating bath introduces through moister-collecting hood from I grade of purifying treating unit air inlet discharges after processing from bottom, through I grade of collection
Enter after liquid bath from the bottom of II grade of purifying treating unit, top is discharged and enters III grade of purifying treating unit through air channel, located
The waste gas of reason enters from III grade of purifying treating unit bottom after III grade of collecting tank from the bottom of IV grade of purifying treating unit again, top
Portion is discharged, and the rest may be inferred is handled.
Technical solution of the present invention further improvement is that：Spray equipment is equipped with the top of purifying treating units at different levels
(11), bottom is provided with collecting tank.
Technical solution of the present invention further improvement is that：Spray equipment (11) circulates to this grade of purifying treating unit
Or intermittent shower cleans, condensing chamber I (1) is connected with chrome-plating bath in I grade of purifying treating unit, and I grade of I grade of purifying treating unit returns
Water receiving tank (2) is connected with chrome-plating bath, and spray equipment (11) is connected with chromium plating with pure water source in final stage reclaiming clean room.
Technical solution of the present invention further improvement is that：The shower water of purifying treating units at different levels comes from next stage and returned
Water receiving tank.
Technical solution of the present invention further improvement is that：The center of condensing chamber I (1) is sky in I grade of purifying treating unit
Chamber, cavity set form annular passage by wind deflector (8) surrounding cavity outside.
Technical solution of the present invention further improvement is that：Liquid level detection system is equipped with purifying treating units at different levels,
The switch of spray equipment (11) controls by controller.
Technical solution of the present invention further improvement is that：Filler is provided with the condensing chamber of purifying treating units at different levels
Layer.
Technical solution of the present invention further improvement is that：Fill material in packing layer is that wander about as a refugee ball, solid plastic is micro-
One or more in ball, polypropylene hollow ball float, polyhedron empty ball, potsherd.
Technical solution of the present invention further improvement is that：It is adjacent in the condensing chamber I (1) of I grade of purifying treating unit to lead
The distance between aerofoil (8) is 2~12mm, and wind deflector (8) surface carried out anti-corrosion, frosted processing.
Technical solution of the present invention further improvement is that：Any odd level purification in addition to I grade of purifying treating unit
Condensing unit is set after processing unit.
By adopting the above-described technical solution, the technological progress that the present invention obtains is：
The mist of chromic acid evaporated in chrome-plating bath is passed through multistage reclaiming clean by the present invention, and in decontamination process at different levels
Again by spraying the recovery and purification method being recycled to chromium fog in this grade of recovery tank.In the processing method of the present invention I grade it is net
Change processing unit with chrome-plating bath to be connected, mist of chromic acid is finally evolved from final stage in the form of chromium ion by reclaiming clean step by step and handles list
Member is sprayed in the purifying treating unit of previous stage, then is sprayed to preceding two-step purification processing unit by previous stage purifying treating unit
In, the rest may be inferred, finally, solution again reuse to chrome-plating bath.The whole process of recovery and purification method does not have the discharge of waste water, realizes zero
Discharge of wastewater purpose；Meanwhile artificial maintenance is not needed during whole reclaiming clean handling process, save labour.
The reclaiming clean processing method of the present invention employs some grades of purified treatments for being sequentially connected in series and being connected with chrome-plating bath
The chromium mist passage that unit is formed is intercepted to chromium mist so that chromium fog passes through the physical absorption with air channel in whole process
Effect, serves the effect of reclaiming clean chromium fog, avoids and new pollutant is produced in chemical treatments, increases to new miscellaneous
The pollution processing procedure of matter.
The inventive method is in the condensing chamber I of I grade of purified treatment, using wind deflector row into the air channel of winding type, and
The interval in air channel is determined according to the diameter of the flow of chromium fog, wind speed and condensing chamber in chrome-plating bath so that the chromium in air channel
The side wall of mist and wind deflector is fully adhered to, is viscous glutinous, is increased the contact area that chromium mist is attached on wind deflector inwall, is strengthened
The adhesion effect of chromium mist；Meanwhile chromium fog is also reduced to the pressure in clean rooms at different levels, it ensure that the security of operation.
The process of packing layer absorption is employed in recovery and purification method of the present invention, due to vortex can be formed in filler,
The collision opportunity of droplet and filler surface is increased simultaneously, in addition in ceramic packing, due to there is larger specific surface area, is formed
Chromium droplet volume it is big, and flowing velocity is slow, interlocks, on the ceramic ring fragment of natural packing in canine tooth, and what is formed is unrestrained
Under long and tortuous gas channel effect, droplet and ceramic packing surface is set to have sufficient time of contact.
During final stage reclaiming clean, employ least significant end and blower fan is installed to whole reclaiming clean process exhausting, compare
In chromium plating recovery method in the prior art, i.e., the mode of blower fan is set in air inlet, avoids air inlet chromium fog to fan
The corrosion of leaf.
Be equipped with the condensing chamber of purifying treating units at different levels in the present invention corresponding units can be circulated or interval
Cleaning showers；Meanwhile liquid level detection system is equipped with reclaiming clean rooms at different levels, the liquid level in collecting tank can be detected at any time,
Realize that rear stage is automatically replenished loss of water for previous stage.
Use the chromium mist waste gas after the chromium plating fog recovery and purification method processing of the present invention, the chromium ion fully recovering of recovery
Into chrome-plating bath, pollution had both been eliminated, treatment effect has been ensure that, has reclaimed resource again；Meanwhile in the discharge of reclaiming clean device
The chromium ion concentration that mouth measures is in 0.027mg/m3, the 0.05mg/m far below country to chromium ion discharge standard3。
Brief description of the drawings
Fig. 1 is the device diagrammatic cross-section of recovery and purification method of the present invention；
Fig. 2 is the top view of condensing chamber I；
Wherein, 1, I, 2, I grade of recovery tank of condensing chamber, 3, flow guide recesses, 4, II, 5, II grade of recovery tank of condensing chamber, 6,
III, 7, III grade of condensing chamber recovery tank, 8, wind deflector, 9, blower fan, 10, catching sheet, 11, spray equipment.
Embodiment
The present invention is described in further details below：
A kind of chromium plating fog recovery and treatment method provided by the invention, the mist of chromic acid in chrome-plating bath are net from I grade through moister-collecting hood
Change processing unit air inlet to introduce from bottom discharge after processing, from the bottom of II grade of purifying treating unit after I grade of collecting tank
Discharged into, top and enter III grade of purifying treating unit through air channel, processed waste gas is again from III grade of purifying treating unit bottom
Portion enters after III grade of collecting tank from the bottom of IV grade of purifying treating unit, top discharge, and the rest may be inferred is handled, final energy
Enough carry out rear safety dumping up to standard.
As shown in figure 1, the decontamination process per one-level includes：Condensing chamber I 1 and chromium plating in I grade of purifying treating unit
Groove connects, and I grade of recovery tank 2 of I grade of purifying treating unit connects with chrome-plating bath, spray equipment 11 in final stage purifying treating unit
Connected with chromium plating with pure water source so that the chromium ion reuse after whole purified treatment is into chrome-plating bath, purifying treating units at different levels
Top be provided with spray equipment 11 and the collecting tank positioned at the connection corresponding with the condensing chamber of condensing chamber bottom.Final stage purified treatment list
Spray equipment 11 is connected with chromium plating with source of purified water in member, is realized the whole discharge without waste water, is realized no effuent discharge
Purpose；Meanwhile purifying treatment method of the invention is not required to manual maintenance in use, has saved labour.
Liquid level detection system is equipped with purifying treating units at different levels, and can by liquid level detection system test or setting
So that this grade of purifying treating unit is circulated spray equipment 11 or intermittent shower cleaning, operator is avoided in device for opening
The infringement to health when being cleaned caused by chromium mist.Meanwhile shower water comes from next stage recovery tank, i.e.,：I grade
The shower water of spray equipment 11 comes from II grade of recovery tank 5, the spray in the decontamination process of the second level in decontamination process
Water drenching comes from III grade of recovery tank 7, and the shower water during third level reclaiming clean comes from pure water groove.Therefore, next stage
Chromium ion concentration in upper level recovery tank will be less than by reclaiming chromium ion concentration in the liquid in tank, so as to recovery tanks at different levels
Middle chromium ion concentration successively decreases, chromium ion concentration highest in I grade of recovery tank 2.I grade of recovery tank 2 is connected with chrome-plating bath, can incite somebody to action
The chromium ion reuse of recovery also saves the water consumption during spray into chrome-plating bath.Mist of chromic acid is by reclaiming clean step by step
Finally it is sprayed in the purifying treating unit of previous stage from final stage evolution processing unit in the form of chromium ion, then is purified by previous stage
Before processing unit is sprayed in two-step purification processing unit, the rest may be inferred, finally, solution again reuse to chrome-plating bath.Reclaiming clean
The whole process of method does not have the discharge of waste water, realizes no effuent discharge purpose；Meanwhile during whole reclaiming clean handling process
Artificial maintenance is not needed, has saved labour.
As shown in Fig. 2 the center of condensing chamber I 1 is cavity in I grade of purifying treating unit, sets outside cavity and enclosed by wind deflector 8
Around the winding type air channel that Formation cross-section is annular.The diameter of the flow of chromium fog, wind speed and condensing chamber determines in chrome-plating bath
The interval in air channel, such as：Φ 400, wind speed 5000m3/ h purifying treating unit, it is solidifying in its chopped-off head purifying treating unit
Tie in room between each wind deflector 8 at intervals of 2~12mm, so that chromium mist in air channel with the inwall of wind deflector 8 fully
Ground glues glutinous, increases the contact area that chromium mist is attached on the inwall of wind deflector 8, strengthens the adhesion effect of chromium mist；Meanwhile also ensure that
The pressure differential of air inlet and air outlet is less than 80Pa, reduces pressure of the wind in air channel so that blower fan 9 wind speed is required to drop
It is low.Surface per a piece of wind deflector 8 can carry out corresponding anti-corrosion, frosted, fold, blistering etc. according to chromium plating liquid mist property and apply
Coating surface processing, increase the decay resistance of wind deflector 8.
For the present invention in the processing procedure to reclaiming clean water, the top that tank 2 is reclaimed at I grade is provided with vertical height
It is 1/5~1/6 flow guide recesses 3 of I grade of recovery height of tank 2 so that blown in chromium fog out of condensing chamber I 1 middle cavity
It when getting off, can adsorb on the liquid level in I grade of recovery tank 2, increase the concentration of chromium ion in I grade of recovery tank 2, add
It is recycled to the utilization rate of chromium ion in chrome-plating bath；Meanwhile after spray equipment 11 starts, the spray that flows down from condensing chamber I 1
Water can collect at flow guide recesses 3, play a part of water conservancy diversion.
It is provided with packing layer in the condensing chamber of purifying treating units at different levels, the fill material in packing layer is wander about as a refugee ball, reality
One or more in heart plastic microsphere, polypropylene hollow ball float, polyhedron empty ball, potsherd.Chromium fog can be with filler
Vortex is formed, while increases the collision opportunity of chromium droplet and filler surface, in addition in ceramic packing, due to there is larger ratio
Surface area, the chromium droplet volume of formation is big, and flowing velocity is slow, interlocks, on the ceramic ring fragment of natural packing in canine tooth,
Under the very long and tortuous gas channel effect formed, droplet and ceramic packing surface is set to have sufficient time of contact.Work as electricity
When the formed hydrogen of solution, the air-flow of oxygen are through these tortuous gas channels, entrained chromium fog can constantly be made pottery
The surface of porcelain filling is adsorbed, and one layer of liquid film is gradually formed on the surface of ceramic packing, due to being acted on by self gravitation,
The surface smooth along ceramics flows downward, and finally pools big drop in ceramic lower end, is back in recovery tank.
The present invention in decontamination process at different levels, catching sheet 10 is provided between collecting tank, so as to realize to each
The cleaning and collection of level processing unit capture liquid mist, catching sheet 10 constitute with the bottom of the condensing chamber of top and connect adjacent condensation
The air channel of room so that flow to the chromium fog not adhered in upper level reclaiming clean step in the condensing chamber of next stage.
The present invention in decontamination process at different levels, can be in any odd level in addition to I grade of purifying treating unit
Condensing unit is set after purifying treating unit, the cohesion and capture of pole fine mist is more beneficial for, can fully reduce mist of chromic acid
Concentration of emission.
Above-mentioned is the detailed content of the present invention, but the invention is not limited in above-mentioned detailed content, that is, is not meant to this
Invention, which has to rely on above-mentioned detailed content, to be implemented.Person of ordinary skill in the field is it will be clearly understood that to the technology of the present invention
Any improvement, all fall within protection scope of the present invention and it is open within the scope of.
Claims (10)
- A kind of 1. chromium plating fog recovery and treatment method, it is characterised in that：Mist of chromic acid in chrome-plating bath is through moister-collecting hood at I grade of purification The introducing of unit air inlet is managed to discharge from bottom after processing, enter after I grade of collecting tank from the bottom of II grade of purifying treating unit, Top is discharged and enters III grade of purifying treating unit through air channel, and processed waste gas is again from III grade of purifying treating unit bottom III Enter after level collecting tank from the bottom of IV grade of purifying treating unit, top discharge, the rest may be inferred is handled.
- A kind of 2. chromium plating fog recovery and treatment method according to claim 1, it is characterised in that：Purifying treating units at different levels Top be equipped with spray equipment（11）, bottom is provided with collecting tank.
- A kind of 3. chromium plating fog recovery and treatment method according to claim 2, it is characterised in that：Spray equipment（11）To this Level purifying treating unit is circulated or intermittent shower cleaning, condensing chamber I in I grade of purifying treating unit（1）It is connected with chrome-plating bath, I grade of recovery tank of I grade of purifying treating unit（2）Connected with chrome-plating bath, spray equipment in final stage reclaiming clean room（11）With plating Chromium is connected with pure water source.
- 4. chromium plating fog reclaiming clean device according to claim 3, it is characterised in that：The spray of purifying treating units at different levels Water drenching comes from next stage recovery tank.
- A kind of 5. chromium plating fog recovery and treatment method according to claim 3, it is characterised in that：I grade of purifying treating unit Middle condensing chamber I（1）Center be cavity, set outside cavity by wind deflector（8）Surrounding cavity forms annular passage.
- A kind of 6. chromium plating fog recovery and treatment method according to claim 3, it is characterised in that：Purifying treating units at different levels In be equipped with liquid level detection system, spray equipment（11）Switch controlled by controller.
- 7. chromium plating fog reclaiming clean device according to claim 3, it is characterised in that：Purifying treating units at different levels coagulate Knot is provided with packing layer in room.
- 8. chromium plating fog reclaiming clean device according to claim 8, it is characterised in that：Fill material in packing layer is The one or more wandered about as a refugee in ball, solid plastic microballoon, polypropylene hollow ball float, polyhedron empty ball, potsherd.
- 9. chromium plating fog reclaiming clean device according to claim 2, it is characterised in that：I grade of purifying treating unit it is solidifying Tie room I（1）In adjacent wind deflector（8）The distance between be 2~12mm, wind deflector（8）Surface was carried out at anti-corrosion, frosted Reason.
- A kind of 10. chromium plating fog recovery and treatment method according to any one of claim 1~9, it is characterised in that：Except I grade Condensing unit is set after any odd level purifying treating unit beyond purifying treating unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710561699.2A CN107376592B (en) | 2017-07-11 | 2017-07-11 | Chromium plating mist recovery treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710561699.2A CN107376592B (en) | 2017-07-11 | 2017-07-11 | Chromium plating mist recovery treatment method |
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| Publication Number | Publication Date |
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| CN107376592A true CN107376592A (en) | 2017-11-24 |
| CN107376592B CN107376592B (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710561699.2A Active CN107376592B (en) | 2017-07-11 | 2017-07-11 | Chromium plating mist recovery treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496523A (en) * | 2019-07-24 | 2019-11-26 | 杭州楚环科技股份有限公司 | A kind of multistage purification formula water supply balance type deodorizing device |
| CN114606556A (en) * | 2022-03-30 | 2022-06-10 | 昆山品钰康机电设备有限公司 | Electroplating chromium energy cyclic utilization system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101543725A (en) * | 2009-04-30 | 2009-09-30 | 深圳市新环机械工程设备有限公司 | Biological filter deodorizing device |
| CN204973504U (en) * | 2015-07-14 | 2016-01-20 | 王蕾 | Nitrogen oxide waste gas treatment system |
| CN205182457U (en) * | 2015-12-11 | 2016-04-27 | 陆哲明 | Contain chromic acid gas multi -stage purification recovery unit |
-
2017
- 2017-07-11 CN CN201710561699.2A patent/CN107376592B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101543725A (en) * | 2009-04-30 | 2009-09-30 | 深圳市新环机械工程设备有限公司 | Biological filter deodorizing device |
| CN204973504U (en) * | 2015-07-14 | 2016-01-20 | 王蕾 | Nitrogen oxide waste gas treatment system |
| CN205182457U (en) * | 2015-12-11 | 2016-04-27 | 陆哲明 | Contain chromic acid gas multi -stage purification recovery unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496523A (en) * | 2019-07-24 | 2019-11-26 | 杭州楚环科技股份有限公司 | A kind of multistage purification formula water supply balance type deodorizing device |
| CN114606556A (en) * | 2022-03-30 | 2022-06-10 | 昆山品钰康机电设备有限公司 | Electroplating chromium energy cyclic utilization system |
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| CN107376592B (en) | 2021-01-08 |
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