CN108620383A - A method of improving color coating unit cleaning performance - Google Patents
A method of improving color coating unit cleaning performance Download PDFInfo
- Publication number
- CN108620383A CN108620383A CN201810337257.4A CN201810337257A CN108620383A CN 108620383 A CN108620383 A CN 108620383A CN 201810337257 A CN201810337257 A CN 201810337257A CN 108620383 A CN108620383 A CN 108620383A
- Authority
- CN
- China
- Prior art keywords
- cleaning solution
- slot
- color coating
- coating unit
- cleaning
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/106—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by boiling the liquid
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Coating Apparatus (AREA)
Abstract
A method of improving color coating unit cleaning performance：Configure cleaning solution；The cleaning solution configured is placed in each slot of color coating unit；Start the circulating pump and heater in unit；Cleaning solution is discharged clean after being recycled in groove tank 23 hours；Injected clear water to groove body works normally liquid level, recycles 30 minutes heel row empty slot liquid, then with deionized water flushed channel body；Other preparations before normal operation are carried out to unit, until complying fully with normal running (operation) conditions.The present invention can thoroughly remove a large amount of mud and residue in the slot and pipeline being collected in color coating unit, reduce labor intensity, color coated steel sheet surface quality is set to stablize, before this method, cause the undesirable oven improvement of color coating properties of product 4% or so since cleaning performance is bad, after being cleaned using the method, performance oven improvement drops within 1%, and qualification rate can be made to improve at least 3% earlier above.
Description
Technical field
The present invention relates to a kind of cleaning methods of device, definitely belong to a kind of side for improving color coating unit cleaning performance
Method.
Background technology
Color coated steel sheet due to being not required to the techniques such as chemical anti-corrosion treatment, spraying, can VOC exhaust gas discharge that thoroughly application is brought,
The discharge of heavy metal-containing waste water waste residue is answered extensively as a kind of environmentally friendly, energy saving, easily processed into type new material
For building, household electrical appliances, the fields such as decoration.
As color coated steel sheet purposes is continually developed in market, such as in light steel construction, building structure, high building curtain wall etc.
It has begun directly to use color coated steel sheet on a large scale.However these are also increasingly stringenter its product quality using field, such as it
Service life, surface quality.In the production process of Coil Coating Products, the cleaning performance to strip of cleaning section directly influences product
Property indices.
In the prior art, color coating unit is all made of two baking techniques of conventional two painting and is produced.In unit through continuous production
After a certain period of time, a large amount of mud and residue will be gathered in pretreatment tank and pipeline, such as clears up not in time, then can lead to alkali
The concentration of effective free alkali of washing trough declines, and influences the ability for removing grease；It is attached in heat-exchanger pipeline, reduces heat exchange
Device ability so that tank liquor operating temperature is difficult to reach setting value；And it can also make spray piping and spray beam spray nozzle clogging, Wu Faquan
Belt steel surface is washed away in face.And since there is easy adhesion, cleaning up not only to make the labor intensity of cleaning personnel for residue and mud
Greatly, yet it is not easy to clean up, color coated steel sheet is polluted, to the coating result for directly influencing unit and final production
The comprehensive performance of product.And then qualification rate can be caused to reduce.Since color coating unit is typically all continuous production unit, when shutting down periodical repair
Between it is short, current cleaning way be using weekly shut down the periodical repair time by artificial 6-8 hour carry out manually root out scale forming matter with
With hose flush clean, scavenging effect is very undesirable.
Through retrieval, the art is a large amount of in the slot and pipeline being collected in color coating unit for that how should thoroughly remove
Mud and residue, the contaminated problem quotient in color coated steel sheet surface do not find solve technical measures.
Invention content
The invention reside in the shortcomings of the prior art is overcome, provide it is a kind of can thoroughly remove the slot that is collected in color coating unit and
A large amount of fouling, mud and residue in pipeline reduce labor intensity, improve working efficiency and keep color coated steel sheet surface quality steady
It is fixed, the method that properties of product qualification rate improves at least 3% color coating unit cleaning performance earlier above.
Realize the measure of above-mentioned purpose：
A method of improving color coating unit cleaning performance, step：
1）Configure cleaning solution：The composition and weight percent content of cleaning solution be：Phosphoric acid：0.4 ~ 0.5%, remaining is deionized water；
2）The cleaning solution configured is placed in each slot of color coating unit, merging amount accounts for the 40 ~ 60% of each tankage；
3）Start the circulating pump and heater in unit, and control the temperature of cleaning solution in each slot at 40 ~ 50 DEG C, flow 1.5 ~
2m3/min；PH value in control loop cleaning solution is 1.8 ~ 2.1；And it is put into hydrochloric acid solution and impregnates after being dismantled each nozzle
Artificial clear water cleaning and dredging are carried out after 0.5-1 hours；
4）Cleaning solution recycles 2-3 hours in groove tank, the circulation cleaning in the pipeline that each slot in color coating unit and each slot are connected
Washing lotion discharge is clean；
5）Injected clear water to groove body work normally liquid level, recycle 30 minutes heel row empty slot liquid, then use deionized water flushed channel body, examine
Flushing water is surveyed, when the pH value in flushing water is 6 ~ 7, when conductivity≤50 μ s/cm, stops bath；
6）Other preparations before normal operation are carried out to unit, until complying fully with normal running (operation) conditions.
Preferably：Cleaning solution merging amount in each slot accounts for the 42 ~ 50% of each tankage.
Preferably：The temperature of cleaning solution is at 44 ~ 50 DEG C in each slot.
Preferably：Phosphorus acid content is 0.43 ~ 0.47% in the cleaning solution.
The effect of each main technique of the present invention
Why the present invention uses phosphorus acid content for 0.4%-0.5%, remaining is the cleaning solution of deionized water, the preferably described cleaning
Phosphorus acid content 0.43 ~ 0.47%, can be occurred to neutralize instead with the alkaline matter in groove body since phosphoric acid belongs to middle strong acid in liquid
It answers, when volatility of phosphoric acid weaker use is smaller to equipment and environmental pollution, and phosphate anion has very strong mating capability, energy
Soluble complex is produced with many metal ions, such as the reactants such as nickel, cobalt in No. 4 groove tanks can be dissolved in phosphoric acid,
However before making the present invention, it is all made of clear water to be cleaned, is due to it is believed that acid can unit without using phosphoric acid cleaning solution
The metal can and metallic conduit of groove tank react and corrode, but by verification, metal groove body and pipeline through alkaline reaction
Layer oxide film is formd, the phosphoric acid of the concentration will not corrode metal groove body equipment.
The cleaning fluid volume why present invention controls in each slot of merging color coating unit accounts for the 40 ~ 60% of each tankage, preferably
Cleaning solution merging amount in each slot in ground accounts for the 42 ~ 50% of each tankage, is since the cleaning solution of the capacity both can abundant circulation cleaning
Clean groove body and pipeline, and phosphoric acid usage amount can be reduced, save old of cleaning.
Why the present invention controls the temperature of cleaning solution in each slot at 40 ~ 50 DEG C, the temperature of cleaning solution in preferably each slot
At 44 ~ 50 DEG C；Flow is in 1.5 ~ 2m3/min；, it is that can be precipitated half less than the temperature phosphoric acid since the crystalline temperature of phosphoric acid is 21 DEG C
Water crystallization object and fail, if temperature is excessively high, when more than 50 DEG C, the corrosion oxidation of phosphoric acid can greatly enhance, and pair may set
It is standby to cause to corrode.
Compared with prior art, the present invention a large amount of mud in the slot and pipeline being collected in color coating unit can be thoroughly removed
And residue, labor intensity is reduced, so that color coated steel sheet surface quality is stablized, before this method, causes since cleaning performance is bad
The undesirable oven improvement of color coating properties of product is 4% or so, and after being cleaned using the method, performance oven improvement drops within 1%, can make
Qualification rate improves at least 3% earlier above.
Specific implementation mode
The present invention is described in detail below：
Embodiment 1
A method of improving color coating unit cleaning performance, step：
1）Configure cleaning solution：The composition and weight percent content of cleaning solution be：Phosphoric acid：0.41%, remaining is deionized water；
2）The cleaning solution configured is placed in each slot of color coating unit, merging amount accounts for the 50% of each tankage；
3）Start the circulating pump and heater in unit, and control the temperature of cleaning solution in each slot at 46 DEG C, flow is in 1.7m3/
min；PH value in control loop cleaning solution is 1.9；And after being put into after being dismantled each nozzle and being impregnated 0.6 hour in hydrochloric acid solution
Carry out artificial clear water cleaning and dredging；
4）When cleaning solution recycles 2 hours in groove tank, the cycle in the pipeline that each slot in color coating unit and each slot are connected
Cleaning solution discharge is clean；
5）Injected clear water to groove body work normally liquid level, recycle 30 minutes heel row empty slot liquid, then use deionized water flushed channel body, examine
Flushing water is surveyed, when the pH value in flushing water is 7, and conductivity is 32 μ s/cm, stops bath；
6）Other preparations before normal operation are carried out to unit, until complying fully with normal running (operation) conditions.
After testing, non sludge and residue remaining in each slot and pipeline, manually only carry out disassembly, cleaning to a nozzle, give birth to
The color coated steel sheet of production is not polluted by mud and residue, properties of product qualification rate in the monthly production cycle after periodic inspection is switched on
It is 99.1%.
Embodiment 2
A method of improving color coating unit cleaning performance, step：
1）Configure cleaning solution：The composition and weight percent content of cleaning solution be：Phosphoric acid：0.48%, remaining is deionized water；
2）The cleaning solution configured is placed in each slot of color coating unit, merging amount accounts for the 43% of each tankage；
3）Start the circulating pump and heater in unit, and control the temperature of cleaning solution in each slot at 41 DEG C, flow is in 1.5m3/
min；PH value in control loop cleaning solution is 1.8；And after being put into after being dismantled each nozzle and being impregnated 0.7 hour in hydrochloric acid solution
Carry out artificial clear water cleaning and dredging；
4）When cleaning solution recycles 2.5 hours in groove tank, by following in each slot in color coating unit and the pipeline of each slot connection
The discharge of ring cleaning solution is clean；
5）Injected clear water to groove body work normally liquid level, recycle 30 minutes heel row empty slot liquid, then use deionized water flushed channel body, examine
Flushing water is surveyed, when the pH value in flushing water is 6, and conductivity is 28 μ s/cm, stops bath；
6）Other preparations before normal operation are carried out to unit, until complying fully with normal running (operation) conditions.
After testing, non sludge and residue remaining in each slot and pipeline, manually only carry out disassembly, cleaning to a nozzle, give birth to
The color coated steel sheet of production is not polluted by mud and residue, properties of product qualification rate in the monthly production cycle after periodic inspection is switched on
It is 98.8%.
Embodiment 3
A method of improving color coating unit cleaning performance, step：
1）Configure cleaning solution：The composition and weight percent content of cleaning solution be：Phosphoric acid：0.43%, remaining is deionized water；
2）The cleaning solution configured is placed in each slot of color coating unit, merging amount accounts for the 45% of each tankage；
3）Start the circulating pump and heater in unit, and control the temperature of cleaning solution in each slot at 43 DEG C, flow is in 1.6m3/
min；PH value in control loop cleaning solution is 2.0；And it is put into hydrochloric acid solution and impregnates 0.75 hour after being dismantled each nozzle
After carry out artificial clear water cleaning and dredging；
4）When cleaning solution recycles 2.8 hours in groove tank, by following in each slot in color coating unit and the pipeline of each slot connection
The discharge of ring cleaning solution is clean；
5）Injected clear water to groove body work normally liquid level, recycle 30 minutes heel row empty slot liquid, then use deionized water flushed channel body, examine
Flushing water is surveyed, when the pH value in flushing water is 6.5, and conductivity is 16 μ s/cm, stops bath；
6）Other preparations before normal operation are carried out to unit, until complying fully with normal running (operation) conditions.
After testing, non sludge and residue remaining in each slot and pipeline, manually only carry out disassembly, cleaning to a nozzle, give birth to
The color coated steel sheet of production is not polluted by mud and residue, properties of product qualification rate in the monthly production cycle after periodic inspection is switched on
It is 99.3%.
Embodiment 4
A method of improving color coating unit cleaning performance, step：
1）Configure cleaning solution：The composition and weight percent content of cleaning solution be：Phosphoric acid：0.49%, remaining is deionized water；
2）The cleaning solution configured is placed in each slot of color coating unit, merging amount accounts for the 48% of each tankage；
3）Start the circulating pump and heater in unit, and control the temperature of cleaning solution in each slot at 44 DEG C, flow is in 1.8m3/
min；PH value in control loop cleaning solution is 1.9；And it is put into after being dismantled each nozzle in hydrochloric acid solution after 1 hour of immersion
Carry out artificial clear water cleaning and dredging；
4）When cleaning solution recycles 3 hours in groove tank, the cycle in the pipeline that each slot in color coating unit and each slot are connected
Cleaning solution discharge is clean；
5）Injected clear water to groove body work normally liquid level, recycle 30 minutes heel row empty slot liquid, then use deionized water flushed channel body, examine
Flushing water is surveyed, when the pH value in flushing water is 7, and conductivity is 19 μ s/cm, stops bath；
6）Other preparations before normal operation are carried out to unit, until complying fully with normal running (operation) conditions.
After testing, non sludge and residue remaining in each slot and pipeline, manually only carry out disassembly, cleaning to a nozzle, give birth to
The color coated steel sheet of production is not polluted by mud and residue, properties of product qualification rate in the monthly production cycle after periodic inspection is switched on
It is 99.0%.
Embodiment 5
A method of improving color coating unit cleaning performance, step：
1）Configure cleaning solution：The composition and weight percent content of cleaning solution be：Phosphoric acid：0.47%, remaining is deionized water；
2）The cleaning solution configured is placed in each slot of color coating unit, merging amount accounts for the 53% of each tankage；
3）Start the circulating pump and heater in unit, and control the temperature of cleaning solution in each slot at 50 DEG C, flow is in 2m3/
min；PH value in control loop cleaning solution is 2.1；And it is 0.55 small that immersion in hydrochloric acid solution is put into after being dismantled each nozzle
Shi Houjin pedestrian's work clear water cleans and dredging；
4）When cleaning solution recycles 2.2 hours in groove tank, by following in each slot in color coating unit and the pipeline of each slot connection
The discharge of ring cleaning solution is clean；
5）Injected clear water to groove body work normally liquid level, recycle 30 minutes heel row empty slot liquid, then use deionized water flushed channel body, examine
Flushing water is surveyed, when the pH value in flushing water is 7, and conductivity is 16 μ s/cm, stops bath；
6）Other preparations before normal operation are carried out to unit, until complying fully with normal running (operation) conditions.
After testing, non sludge and residue remaining in each slot and pipeline, manually only carry out disassembly, cleaning to a nozzle, give birth to
The color coated steel sheet of production is not polluted by mud and residue, properties of product qualification rate in the monthly production cycle after periodic inspection is switched on
It is 99.1%.
Embodiment 6
A method of improving color coating unit cleaning performance, step：
1）Configure cleaning solution：The composition and weight percent content of cleaning solution be：Phosphoric acid：0.47%, remaining is deionized water；
2）The cleaning solution configured is placed in each slot of color coating unit, merging amount accounts for the 59% of each tankage；
3）Start the circulating pump and heater in unit, and control the temperature of cleaning solution in each slot at 44 DEG C, flow is in 1.75m3/
min；PH value in control loop cleaning solution is 1.9；And 0.9 hour of immersion in hydrochloric acid solution is put into after being dismantled each nozzle
After carry out artificial clear water cleaning and dredging；
4）When cleaning solution recycles 2.6 hours in groove tank, by following in each slot in color coating unit and the pipeline of each slot connection
The discharge of ring cleaning solution is clean；
5）Injected clear water to groove body work normally liquid level, recycle 30 minutes heel row empty slot liquid, then use deionized water flushed channel body, examine
Flushing water is surveyed, when the pH value in flushing water is 6.5, and conductivity is 36 μ s/cm, stops bath；
6）Other preparations before normal operation are carried out to unit, until complying fully with normal running (operation) conditions.
After testing, non sludge and residue remaining in each slot and pipeline, manually only carry out disassembly, cleaning to a nozzle, give birth to
The color coated steel sheet of production is not polluted by mud and residue, properties of product qualification rate in the monthly production cycle after periodic inspection is switched on
It is 98.9%.
Present embodiment is only the best example, not to the restricted implementation of technical solution of the present invention.
Claims (4)
1. a kind of method improving color coating unit cleaning performance, step：
1）Configure cleaning solution：The composition and weight percent content of cleaning solution be：Phosphoric acid：0.4 ~ 0.5%, remaining is deionized water；
2）The cleaning solution configured is placed in each slot of color coating unit, merging amount accounts for the 40 ~ 60% of each tankage；
3）Start the circulating pump and heater in unit, and control the temperature of cleaning solution in each slot at 40 ~ 50 DEG C, flow 1.5 ~
2m3/min；PH value in control loop cleaning solution is 1.8 ~ 2.1；And it is put into hydrochloric acid solution and impregnates after being dismantled each nozzle
Artificial clear water cleaning and dredging are carried out after 0.5-1 hour；
4）Cleaning solution recycles 2-3 hour in groove tank, the cycle in the pipeline that each slot in color coating unit and each slot are connected
Cleaning solution discharge is clean；
5）Injected clear water to groove body work normally liquid level, recycle 30 minutes heel row empty slot liquid, then use deionized water flushed channel body, examine
Flushing water is surveyed, when the pH value in flushing water is 6 ~ 7, when conductivity≤50 μ s/cm, stops bath；
6）Other preparations before normal operation are carried out to unit, until complying fully with normal running (operation) conditions.
2. a kind of method improving color coating unit cleaning performance as described in claim 1, it is characterised in that：In each slot
Cleaning solution merging amount accounts for the 42 ~ 50% of each tankage.
3. a kind of method improving color coating unit cleaning performance as described in claim 1, it is characterised in that：Cleaning solution in each slot
Temperature at 44 ~ 50 DEG C.
4. a kind of method improving color coating unit cleaning performance as described in claim 1, it is characterised in that：In the cleaning solution
Phosphorus acid content is 0.43 ~ 0.47%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810337257.4A CN108620383B (en) | 2018-04-16 | 2018-04-16 | Method for improving cleaning effect of color coating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810337257.4A CN108620383B (en) | 2018-04-16 | 2018-04-16 | Method for improving cleaning effect of color coating unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108620383A true CN108620383A (en) | 2018-10-09 |
| CN108620383B CN108620383B (en) | 2021-06-15 |
Family
ID=63705205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810337257.4A Active CN108620383B (en) | 2018-04-16 | 2018-04-16 | Method for improving cleaning effect of color coating unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108620383B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158072A (en) * | 2019-04-30 | 2019-08-23 | 首钢京唐钢铁联合有限责任公司 | Passivation region cleaning method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87105801A (en) * | 1987-08-28 | 1988-08-24 | 北京量具刃具厂 | Cleaning technique for steel product before film-plating |
| CN105018241A (en) * | 2015-08-20 | 2015-11-04 | 太仓市金鹿电镀有限公司 | Method for cleaning metal ion pollutants on surface of ultrafiltration membrane and preparation method of cleaning solution used thereof |
| US9447507B2 (en) * | 2003-01-23 | 2016-09-20 | Henkel Ag & Co. Kgaa | Cleaner composition for formed metal articles |
| CN205587338U (en) * | 2015-12-28 | 2016-09-21 | 浙江明泉工业涂装有限公司 | Water -saving before painting handles belt cleaning device |
-
2018
- 2018-04-16 CN CN201810337257.4A patent/CN108620383B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87105801A (en) * | 1987-08-28 | 1988-08-24 | 北京量具刃具厂 | Cleaning technique for steel product before film-plating |
| US9447507B2 (en) * | 2003-01-23 | 2016-09-20 | Henkel Ag & Co. Kgaa | Cleaner composition for formed metal articles |
| CN105018241A (en) * | 2015-08-20 | 2015-11-04 | 太仓市金鹿电镀有限公司 | Method for cleaning metal ion pollutants on surface of ultrafiltration membrane and preparation method of cleaning solution used thereof |
| CN205587338U (en) * | 2015-12-28 | 2016-09-21 | 浙江明泉工业涂装有限公司 | Water -saving before painting handles belt cleaning device |
Non-Patent Citations (3)
| Title |
|---|
| 岳张锋等: "新建电泳涂装系统清洗与投槽探讨", 《上海涂料》 * |
| 张聪: "大型汽车涂装生产线建设和生产过程中的保洁管理", 《现代涂装》 * |
| 潘荣强: "汽车涂装车间专业保洁述评", 《清洗世界》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158072A (en) * | 2019-04-30 | 2019-08-23 | 首钢京唐钢铁联合有限责任公司 | Passivation region cleaning method |
| CN110158072B (en) * | 2019-04-30 | 2021-02-26 | 首钢京唐钢铁联合有限责任公司 | Passivation region cleaning method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108620383B (en) | 2021-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104406452B (en) | The cleaning method of nickel heat exchanger incrustation scale | |
| CN105149193A (en) | Metal surface coating pretreatment process | |
| CN106795635B (en) | The cleaning method and its device of wire rod | |
| CN101109088A (en) | Technique for cleaning acid dirty of acid reactivating machine group inner loop type pipeline | |
| WO2021218185A1 (en) | Energy-saving and environmentally-friendly steel strip electrolytic pickling system | |
| CN103376026A (en) | Device for intelligently cleaning fouling of plate type heat exchanger in heat supply system | |
| CN105543938A (en) | Surface treatment electrophoresis process for anti-oil range hood impeller | |
| CN101575708A (en) | Washing liquid applied to station boiler and washing method | |
| CN102534741A (en) | Production process for rapidly achieving galvanization and polyvinyl fluoride (PVF) paint coating of tubular products | |
| CN111519238A (en) | Circulating environment-friendly medium solution for electrolytically removing stainless steel oxide skin, application method and operation equipment | |
| CN108620383A (en) | A method of improving color coating unit cleaning performance | |
| CN104949571A (en) | Method and device for zero-release online accurate chemical cleaning of tubular heat exchanger | |
| CN101245456A (en) | Prefilming technique for condensator brass pipe of electric power plant with green copperas | |
| CN210847546U (en) | Automatic cleaning and descaling device for cooling tower | |
| CN211999931U (en) | High-efficient stainless steel tank body cleaning system | |
| CN210314491U (en) | Processing system for metal surface micro-etching | |
| CN102586772B (en) | Passivation process after chemical cleaning of boiler | |
| CN102277600A (en) | Surface treatment method for electroplated copper door | |
| CN102304706B (en) | Anticorrosion treatment device and treatment method for surface of long and narrow runner of aluminium alloy radiator | |
| CN210506537U (en) | Energy-saving pickling system | |
| CN101487119A (en) | Metal composite passivation process after boiler cleaning in heat power plant | |
| CN213835548U (en) | Energy-concerving and environment-protective type pickling circulation system | |
| CN213112809U (en) | Processing apparatus of spent acid | |
| CN210138759U (en) | Pipeline cleaning spray head | |
| CN204630467U (en) | A kind of drum boiler economizer chemically-cleaning device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |