CN206089280U - Steel industry nitric acid and hydrofluoric acid mixed acid pickling liquid waste's processing recovery system - Google Patents
Steel industry nitric acid and hydrofluoric acid mixed acid pickling liquid waste's processing recovery system Download PDFInfo
- Publication number
- CN206089280U CN206089280U CN201621097066.8U CN201621097066U CN206089280U CN 206089280 U CN206089280 U CN 206089280U CN 201621097066 U CN201621097066 U CN 201621097066U CN 206089280 U CN206089280 U CN 206089280U
- Authority
- CN
- China
- Prior art keywords
- acid
- pipeline
- nitric acid
- reaction member
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The utility model provides a steel industry nitric acid and hydrofluoric acid mixed acid pickling liquid waste's processing recovery system, is used for steel industry acid -washing production line to be used for the pickling steel acidizing fluid that bipolar membrane electrodialysis equipment made, has saved material cost, and utilize the alkali lye place to go of bipolar membrane electrodialysis equipment system to manage nitric acid and hydrofluoric acid mixed acid waste liquid. And the mode that adopts reaction water tank bottom aeration makes reaction liquid mix more fully to constantly to providing sufficient oxygen, shortening reaction time greatly in the mixed solution. And will react the mixed solution in back with bag filter and filter, carry out solid -liquid separation with supernatant and precipitate. The reaction back, nitrate radical and fluorine ion in nitric acid and the hydrofluoric acid mixed acid waste liquid are replaced out, and the fe2+ in nitric acid and the hydrofluoric acid mixed acid waste liquid forms the cementout. Bipolar membrane electrodialysis equipment relieving haperacidity system alkali again can be got back to to supernatant after filtering through bag filter, and the raw materials input cost has significantly reduced. The precipitate can dry the back and retrieve outer selling. So as to realizes the zero release of nitric acid and hydrofluoric acid mixed acid waste liquid.
Description
Technical field
This utility model belongs to technical field of sewage, and in particular to a kind of steel industry nitric acid and Fluohydric acid. mixed acid
The process recovery system of waste liquid.
Background technology
Rustless steel, alloy steel surface in steel and iron industry, produces in process one layer of oxide, typically uses
Mixed acid is removed and gone.At present domestic and international manufacturer, is removed using nitrate acid and hydrofluoric acid mixed acid and deoxygenates compound more.Using nitric acid,
Fluohydric acid. mixed acid pickling, it is fast with pickling speed, it is difficult overpickling a little, and good table is kept just now after pickling
Face.This three is that other pickling institutes are inaccessiable.Many pickling of Jing, the metal ion in pickle increases to finite concentration,
Acid content drops to certain percentage, that is, lose pickling ability and become waste liquid, but the total acidity in this waste liquid or at a relatively high
, and be highly corrosive agents containing the salts such as substantial amounts of metallic iron, nickel, chromium, nitric acid, Fluohydric acid., chromium is extremely toxic substance, is such as allowed to outer
Row, will cause severe contamination to environment, so must refrain from pickle liquor without the arbitrarily outer row of process.Additionally, nitric acid, fluoric acid
Cost price is more expensive, and the nitric acid, fluoric acid in spent acid liquid does not have reuse directly to discharge the waste for yet causing resource significantly.
At present the domestic and international processing method to nitric acid, hydrofluoric acid waste liquid mainly has chemical method, reduction vaporization method, ion exchange
Method and solvent extraction.
Chemical method：Typically process is neutralized to it using Calx, carbide slag or Caustic soda, makes pH value reach country's discharge mark
Discharge after standard.It has the disadvantage to neutralize medicament high cost, and expensive, spent acid treating capacity is restricted, and in pickle liquor
HNO3, the resource such as HF and slaine is not utilized effectively.Sludge quantity is big, and remaining salt residue treatment is difficult, and equipment is rotten
Erosion is serious.
Reduction vaporization method：Reduction vaporization method its principle is that sulphuric acid is added toward acid pickle, makes the nitre in sulfate radical and waste liquid
Acid group and fluorion are replaced, and form the sulfate of metal, under negative pressure, using sulphuric acid and nitric acid, Fluohydric acid. equilibrium temperature not
Together, heating evaporation goes out gaseous nitric acid and Fluohydric acid., condensed, that is, obtain the mixed acid for regenerating, and is re-used for pickling.In residual liquid
Slaine containing sulphuric acid and sulphuric acid, through cooling, sulfate formation crystallization, Jing solid-liquid separation, containing certain density sulphuric acid
Liquid can be recycled.Solid metallic sulfate sediment otherwise processed, can reclaim the metals such as nickel therein, chromium.The method
Acid recovering rate is high, but one-time investment is big, and maintenance of equipment is difficult, and the residual acid amount of bottoms is larger.
Ion exchange：Commutative group in using ion-exchanger and various interionic ion exchange energy in solution
The difference of power is carrying out a kind of detached method.Its shortcoming the method has a certain limitation, high equipment cost, the ferrum in water from
The materials such as son, aluminium ion meeting contaminated ion exchanger resin, affects resin work exchange capacity, causes resin poison to fail.
Solvent extraction：Its principle is that sulphuric acid is passed through in waste liquid, and the metallic salt in sulphuric acid and waste liquid occurs double decomposition
Reaction, the slaine in waste liquid changes into the sulfate of metal, nitric acid and Fluohydric acid. separate out, with tbp (TBP)
Make extractant, nitric acid and Fluohydric acid. are transferred in extractant, water back extraction is then used in back extraction tower, that is, obtain nitric acid, hydrogen fluorine
The mixed acid of acid, is re-used for pickling.The method advantage less energy consumption, equipment and materials is easily selected, but the response rate of acid is low.
In this context, with membrane technology to rely on, spent acid equipment for reclaiming has been developed successfully, it is with being easily achieved
Technological transformation, rate of return on investment are high, easily operated, easy to maintain, operating cost is low, high degree of automation the features such as.Spent acid is returned
Spent acid reuse can be processed with equipment, is changed harmful to treasure, be that enterprise solves also to bring high economic benefit while environmental issue, be made
It is very considerable with prospect with field, it is worth with huge investment repayment.
Utility model content
In order to overcome the problems of the prior art, the technical problems to be solved in the utility model be provide a kind of energy-conservation,
Environmental protection and in steel and iron industry nitric acid and Fluohydric acid. mixed acid liquid waste disposal technique, be capable of achieving acid washing rolled steel during no pollution, it is complete
Meet the steel nitric acid and Fluohydric acid. mixed acid liquid waste processing and recovery system of environmental requirement entirely.
The technical scheme that this utility model is adopted for achieving the above object is：A kind of steel industry nitric acid and Fluohydric acid. are mixed
Close the process recovery system of sour pickle liquor, including single filter unit, reaction member and cascade filtration unit, acid pickle entrance
The filter inlet on single filter unit top, the filtration of single filter unit bottom are connected to by pipeline Jing water pumps and valve
Device outlet is connected to reaction member upper entrance by pipeline, because nitric acid and Fluohydric acid. mixed acid have volatility, so institute
It is sealed construction to state reaction member top, and is provided with seal gasket with being placed on the gap of reaction member top pipeline, instead
The reactant liquor for answering unit bottom exports the filter inlet that cascade filtration unit top is connected to by pipeline Jing water pumps and valve,
The filter outlet of cascade filtration unit bottom is connected to circulating and recovering mouth by pipeline Jing valves, and the system also includes bipolar
EDBM equipment, the bipolar membrane electrodialysis equipment is followed including alkali liquor circulating box, saline solution circulating box, acid cycle case and pole water
Ring case, the circulating and recovering mouth is connected to the entrance of saline solution circulating box by pipeline, due to nitric acid and Fluohydric acid. mixed liquor not
Only volatility, and see that light easily decomposes, so the casing of the acid cycle case is made up and in its water tank of light tight material
Top is additionally provided with closure, and the outlet of the alkali liquor circulating box is connected to reaction member upper entrance by pipeline, described anti-
Unit intracavity bottom is answered to be additionally provided with evenly distributed aeration head, the aeration head is connected to reaction member bottom by pipeline
Air inlet, is additionally provided with aerator on the air inlet, the outlet of the acid cycle case is connected to pickling lines, the acid
Wash the leakage fluid dram connection acid pickle entrance of production line.
Further, system also includes control module, described that pH value detector, pH value inspection are additionally provided with before valve pipeline
Survey instrument to electrically connect with control module, the pH value detector is connected to floss hole, the valve and valve by pipeline via valve
Door is electric control valve and electrically connects with control module.
Further, the single filter unit and cascade filtration unit are bag filter.
For prior art, the beneficial effects of the utility model are：Nitric acid obtained in bipolar membrane electrodialysis system and hydrogen fluorine
Sour mixed acid can return pickling lines；The alkali liquor of generation is used to process the Fe of nitric acid and Fluohydric acid. mixing acid waste liquid2+And replace
The nitrate anion and fluorion swapped out in nitric acid and Fluohydric acid. mixing acid waste liquid is back to use bipolar membrane electrodialysis system antacid system again
Alkali；The technology can process steel industry nitric acid and Fluohydric acid. mixing acid waste liquid, make Fe2+All with Fe（OH)3Solid form is precipitated
Discharge；Replace out more than 95% nitrate anion and fluorion；So as to realize the zero-emission of acid pickle.
Using the system have current efficiency it is high, can continuous and stable production and it is simple to operate the characteristics of, governance process is not required to
Plus eo-acid or equipment, pipeline, valve in alkali, device etc. are using anti-corrosion material and technology.The durable service life of device anti-corrosion
Long, No leakage, characteristics of compact layout, floor space is few, the plurality of advantages for operating running expense low, specifically also includes following features： 1）
Flow process is succinct, energy-conservation, and easy to operate, floor space is little； 2）System consumption is few, and operating cost is relatively low；3）The nitric acid for obtaining
With Fluohydric acid. mixed acid, used with being directly entered production line；4）Simultaneously side-product hydrated ferric oxide. is obtained, rear barreled can be dried and gone out
Sell；5）Energy-conservation, resource regeneration, zero release of pollutant meets national requirements for environmental protection.
Description of the drawings
Fig. 1 is the structural representation that this utility model pickle liquor processes recovery system；
Fig. 2 is control module principle schematic of the present utility model；
Fig. 3 is this utility model bipolar membrane electrodialysis equipment operation principle schematic diagram.
In figure：1 single filter unit, 2 reaction members, 3 cascade filtration units, 4 acid pickle entrances, 5 water pumps, 6 valves, 8
Valve, 9 circulating and recovering mouths, 10 bipolar membrane electrodialysis equipment, 11 alkali liquor circulating boxes, 12 saline solution circulating boxes, 13 acid cycle casees, 14
Pole water circulation case, 15 aeration heads, 16 air inlets, 17 aerators, 18 state pickling lines, 19 pH value detector mouths, 20 valves,
21 control modules, 22 floss holes.
Specific embodiment
Below in conjunction with the accompanying drawings 1-3 is described in further detail to this utility model, it is noted that embodiment described below
It is intended to be easy to understanding of the present utility model, and any restriction effect is not risen to it.
As Figure 1-3, the application provides a kind of steel industry nitric acid and the process of Fluohydric acid. mixed acid pickle liquor is returned
The process recovery system of a kind of steel industry nitric acid of receipts system and Fluohydric acid. mixed acid pickle liquor, including single filter unit 1,
Reaction member 2 and cascade filtration unit 3, acid pickle entrance 4 is connected to single filter unit 1 by pipeline Jing water pumps 5 and valve 6
The filter inlet on top, because nitric acid and Fluohydric acid. mixed acid have volatility, to prevent nitric acid and Fluohydric acid. mixed acid from existing
In course of reaction volatilize, the top of the reaction member 2 be sealed construction, and be placed in the gap of the top pipeline of reaction member 2
On be provided with seal gasket, the filter outlet of the bottom of single filter unit 1 is connected to the top of reaction member 2 and enters by pipeline
Mouthful, the reactant liquor outlet of the bottom of reaction member 2 is connected to the mistake on the top of cascade filtration unit 3 by pipeline Jing water pumps 5 and valve 6
Filter inlet, the filter outlet of the bottom of cascade filtration unit 3 is connected to circulating and recovering mouth 9 by pipeline Jing valves 8, described useless
Acid solution is discharged from pickling lines 18, into acid pickle entrance 4, by pipeline Jing water pumps 5 and the connection of valve 6 single filter is entered
Unit 1, mixed solution is filtered, and removes large granular impurity and oil slick；
The system also includes bipolar membrane electrodialysis equipment 10, and the bipolar membrane electrodialysis equipment 10 includes alkali liquor circulating box
11st, saline solution circulating box 12, acid cycle case 13 and pole water circulation case 14, by the Na of prescribed concentration2SO4Solution is placed in Bipolar Membrane electricity
In the salt chamber circulating water groove 12 of electrodialysis equipment 10, start bipolar membrane electrodialysis equipment 10, acid cycle groove 13 carries out closed cycle
10-15 minutes, the H of generation2SO4Solution concentration is also constantly rising, and works as H2SO4When solution concentration reaches 5% mass ratio, by side
To production line pickling lines 18, alkali liquor circulating box 11 constantly carries out closed cycle to pass, and the NaOH solution concentration of generation also exists
Constantly rise, when NaOH concentration reaches 4% mass ratio, bipolar membrane electrodialysis equipment 10 quits work, to prevent Bipolar Membrane electric osmose
The film of desorption device 10 is blocked, and steel and iron industry nitric acid and Fluohydric acid. mixed acid pickle liquor not directly enter bipolar membrane electrodialysis equipment
10, but the alkali liquor made using bipolar membrane electrodialysis equipment 10 goes to be reacted with nitric acid and Fluohydric acid. mixing acid waste liquid；Filtrate
The outlet of the bottom of Jing single filters unit 1 enters reaction member 2 by pipeline, and the alkali liquor of bipolar membrane electrodialysis equipment 10 is circulated
The NaOH produced in case 11, by pipeline reaction member 2 is added；The outlet of the acid cycle case 13 is connected to pickling lines
18, the leakage fluid dram connection acid pickle entrance 4 of the pickling lines 18；
The circulating and recovering mouth 9 is connected to the entrance of saline solution circulating box 12 by pipeline, and the alkali liquor circulating box 11 goes out
Mouth is connected to the upper entrance of reaction member 2 by pipeline, because the mixed liquor of nitric acid and Fluohydric acid. does not only have volatility, Er Qiejian
Light easily decomposes, so the casing of the acid cycle case 13 is made up of light tight material and is additionally provided with sealing in its water tank upper
Lid, the intracavity bottom of the reaction member 2 is additionally provided with evenly distributed aeration head 15, and the aeration head 15 is connected to by pipeline
The air inlet 16 of the bottom of reaction member 2, is additionally provided with aerator 17 on the air inlet 16, start aerator 17, and air is led to
Cross aeration head 15 to be input into from the bottom to top to reaction member 2, make NaOH solution with nitric acid and Fluohydric acid. mixed acid pickle liquor anti-
Uniform sufficiently mixing in unit 2 is answered, and constantly to aeration in mixed solution, and made by the way of reaction water tank bottom aeration
Reactant liquor is more fully mixed, and the oxygen of abundance is constantly provided into mixed solution, greatly shortens the response time；Bis- grades of mistakes of Jing
After filter unit 3 is filtered, precipitate is recovered；
The efficiency of the further process recovery system for improving steel industry nitric acid and Fluohydric acid. mixed acid pickle liquor, also
It is described that pH value detector 19, pH value detector 19 and control module 21 are additionally provided with before the pipeline of valve 8 including control module 21
Electrical connection, the pH value detector 19 is connected to floss hole 22 by pipeline via valve 20, and the valve 8 and valve 20 are
Electric control valve is simultaneously electrically connected with control module 21, and supernatant flows through pH value detector 19, as pH=9, illustrates to react anti-in water tank
Should be abundant, Fe in acid pickle2+Precipitate completely, supernatant after filtering is that composition is NaNO3, NaF and a small amount of NaOH, this
When the control valve 8 of control module 21, the liquid in pipeline is caused into saline solution circulating box；As pH=8, illustrate to react anti-in water tank
Should be abundant, Fe in acid pickle2+Precipitate completely, supernatant after filtering is that composition is NaNO3, NaF and a small amount of NaOH, this
When the control valve 8 of control module 21, the liquid in pipeline is caused into saline solution circulating box；As supernatant pH=7, although in neutrality,
But now may still contain micro unprecipitated Fe in solution2+With a large amount of NaNO3, NaF mixed solutions, to prevent Fe2+Into salt
Liquid circulating box, at this moment the control valve 20 of control module 21, by liquid in pipeline city planting ductwork is entered, and meets environmental requirement；When
During supernatant pH=6, illustrate to react and react in water tank insufficient, typically in faintly acid, now containing a small amount of unprecipitated in solution
Fe2+With a large amount of NaNO3, NaF mixed solutions, to prevent Fe2+Into saline solution circulating box, the at this moment control valve 20 of control module 21,
Liquid in pipeline is entered into city planting ductwork, and meets environmental requirement；Control module 21 adopts PLC control system and man machine interface,
System reliability is high, and strong antijamming capability is comprehensive, and perfect in shape and function, client is non-maintaining, forms human computer conversation.
The efficiency of the further process recovery system for improving steel industry nitric acid and Fluohydric acid. mixed acid pickle liquor, institute
State single filter unit 1 and cascade filtration unit 3 is bag filter.
In sum, it is bipolar membrane electrodialysis equipment is prepared that acid solution is used for steel and iron industry pickling lines for pickling steel
Material, saves cost of material；And go to process nitric acid and Fluohydric acid. mixing acid waste liquid using the alkali liquor of bipolar membrane electrodialysis equipment.
And it is more fully mixed reactant liquor by the way of reaction water tank bottom aeration, and the constantly offer abundance into mixed solution
Oxygen, greatly shortens the response time.And filtered mixed solution after reaction with bag filter, by supernatant and precipitate
Carry out solid-liquid separation.After reaction, the nitrate anion and fluorion in nitric acid and Fluohydric acid. mixing acid waste liquid is replaced out, nitric acid and
Fe in Fluohydric acid. mixing acid waste liquid2+Form Precipitation.Supernatant after bag filter is filtered can return to Bipolar Membrane
Electrodialysis plant antacid alkaline again, greatly reduces raw material input cost.Precipitate is outer after can drying to be sold.So as to reality
The zero-emission of existing nitric acid and Fluohydric acid. mixing acid waste liquid.This method treatment effect is obvious, energy continuous and stable production, equipment, pipeline
Valve etc. adopts anti-corrosion material, and anti-corrosion is durable, and system operatio running expense is low.
While there has been shown and described that embodiment of the present utility model, for one of ordinary skill in the art
Speech, it is possible to understand that can carry out various changes to these embodiments in the case of without departing from principle of the present utility model and spirit
Change, change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.
Claims (3)
1. a kind of process recovery system of steel industry nitric acid and Fluohydric acid. mixed acid pickle liquor, including single filter unit
（1）, reaction member（2）With cascade filtration unit（3）, acid pickle entrance（4）By pipeline Jing water pumps（5）And valve（6）Connection
To single filter unit（1）The filter inlet on top, single filter unit（1）The filter outlet of bottom is connected by pipeline
To reaction member（2）Upper entrance, the reaction member（2）Top is sealed construction, and be placed in reaction member（2）Top
Seal gasket, reaction member are provided with the gap of pipeline（2）The reactant liquor outlet of bottom passes through pipeline Jing water pumps（5）And valve
（6）It is connected to cascade filtration unit（3）The filter inlet on top, cascade filtration unit（3）The filter outlet of bottom passes through
Pipeline Jing valves（8）It is connected to circulating and recovering mouth（9）, it is characterised in that：The system also includes bipolar membrane electrodialysis equipment
（10）, the bipolar membrane electrodialysis equipment（10）Including alkali liquor circulating box（11）, saline solution circulating box（12）, acid cycle case（13）
With pole water circulation case（14）, the circulating and recovering mouth（9）Saline solution circulating box is connected to by pipeline（12）Entrance, the acid solution
Circulating box（13）Casing be made up of light tight material and top is additionally provided with closure, the alkali liquor circulating box（11）Outlet
Reaction member is connected to by pipeline（2）Upper entrance, the reaction member（2）Intracavity bottom is additionally provided with evenly distributed exposure
Gas head（15）, the aeration head（15）Reaction member is connected to by pipeline（2）The air inlet of bottom（16）, the air inlet
（16）On be additionally provided with aerator（17）, the acid cycle case（13）Outlet be connected to pickling lines（18）, the acid
Wash the leakage fluid dram connection acid pickle entrance of production line (18)（4）.
2. the process recovery system of a kind of steel industry nitric acid as claimed in claim 1 and Fluohydric acid. mixed acid pickle liquor,
It is characterized in that：System also includes control module（21）, described in the cascade filtration unit（3）The filter outlet of bottom
With valve（8）Between pipeline on be additionally provided with pH value detector（19）, pH value detector（19）With control module（21）It is electrically connected
Connect, the pH value detector（19）By pipeline via valve（20）It is connected to floss hole（22）, the valve（8）And valve
（20）It is electric control valve and and control module（21）Electrical connection.
3. the process recovery system of a kind of steel industry nitric acid as claimed in claim 1 and Fluohydric acid. mixed acid pickle liquor,
It is characterized in that：The single filter unit（1）With cascade filtration unit（3）It is bag filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621097066.8U CN206089280U (en) | 2016-10-01 | 2016-10-01 | Steel industry nitric acid and hydrofluoric acid mixed acid pickling liquid waste's processing recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621097066.8U CN206089280U (en) | 2016-10-01 | 2016-10-01 | Steel industry nitric acid and hydrofluoric acid mixed acid pickling liquid waste's processing recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206089280U true CN206089280U (en) | 2017-04-12 |
Family
ID=58481908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621097066.8U Expired - Fee Related CN206089280U (en) | 2016-10-01 | 2016-10-01 | Steel industry nitric acid and hydrofluoric acid mixed acid pickling liquid waste's processing recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206089280U (en) |
-
2016
- 2016-10-01 CN CN201621097066.8U patent/CN206089280U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102603097B (en) | Advanced treatment and recycling process for wastewater containing heavy metal ions | |
| CN109161895A (en) | Acid copper chloride etching liquid copper reclaiming system and reclaiming method | |
| CN103151088A (en) | Composite flocculating agent for processing radioactive elements iron, cobalt, manganese and silver in nuclear waste water and processing method | |
| CN103553249A (en) | Method for acid separation and heavy metal recovery in electroplating waste liquor | |
| CN104909508A (en) | Electroplating chromium-containing wastewater treatment method and device | |
| CN106800352A (en) | System for processing chrome-containing wastewater | |
| CN103755082A (en) | System and method for resource recovery of regenerated wastewater of ion exchange resin | |
| CN105385851A (en) | Treatment method of acid pickling waste liquid | |
| CN104438287A (en) | Arsenic sulfide waste residue recycling treatment method and device thereof | |
| CN106495356A (en) | The processing method and system of steel industry nitric hydrofluoric acid mixed acid pickle liquor | |
| CN106277486A (en) | The process recovery method of a kind of steel industry hydrochloric acid pickling waste liquor and system thereof | |
| CN206089294U (en) | Steel industry hydrochloric acid pickling liquid waste's processing recovery system | |
| CN102002729A (en) | Copper-containing waste etching solution treatment method and etching solution regeneration method | |
| CN107630220A (en) | Acidic etching liquid regeneration treatment system | |
| CN102897885B (en) | The method of sulfuric acid industry Two-way Cycle jet-type arsenic removal | |
| CN106277474A (en) | The process recovery method of a kind of steel industry sulfuric acid pickling waste liquid and system thereof | |
| CN105923610A (en) | Novel process of acetylene purification and waste acid regeneration | |
| Chiao et al. | Bipolar membranes for purification of acids and bases | |
| CN105712545B (en) | A kind of copper-containing wastewater recovery and processing system | |
| CN206089280U (en) | Steel industry nitric acid and hydrofluoric acid mixed acid pickling liquid waste's processing recovery system | |
| CN205953515U (en) | Regeneration system of peace and quiet spent acid of acetylene | |
| CN107151072A (en) | A kind of handling process of desulfurization wastewater | |
| CN111591966B (en) | Device and method for recovering phosphoric acid in aluminum etching waste liquid | |
| WO2023208060A1 (en) | Method for recycling circuit board copper chloride etching waste liquid by means of precipitation treatment, and apparatus thereof | |
| CN110408938B (en) | Etching solution recycling process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20191001 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |