CN114538693A - Cleaning agent regeneration method for antirust surface cleaning process - Google Patents
Cleaning agent regeneration method for antirust surface cleaning process Download PDFInfo
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- CN114538693A CN114538693A CN202210247700.5A CN202210247700A CN114538693A CN 114538693 A CN114538693 A CN 114538693A CN 202210247700 A CN202210247700 A CN 202210247700A CN 114538693 A CN114538693 A CN 114538693A
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- 239000012459 cleaning agent Substances 0.000 title claims abstract description 53
- 238000011069 regeneration method Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004140 cleaning Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 70
- 239000002699 waste material Substances 0.000 claims abstract description 52
- 238000001914 filtration Methods 0.000 claims abstract description 51
- 239000000706 filtrate Substances 0.000 claims abstract description 24
- 239000000243 solution Substances 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000008929 regeneration Effects 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000003463 adsorbent Substances 0.000 claims abstract description 11
- 230000001590 oxidative effect Effects 0.000 claims abstract description 10
- 239000004744 fabric Substances 0.000 claims abstract description 9
- 239000011550 stock solution Substances 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 239000007800 oxidant agent Substances 0.000 claims abstract description 8
- 238000001556 precipitation Methods 0.000 claims abstract description 5
- 238000004064 recycling Methods 0.000 claims abstract description 5
- 239000006228 supernatant Substances 0.000 claims abstract description 5
- 238000007885 magnetic separation Methods 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000012535 impurity Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 7
- 239000012065 filter cake Substances 0.000 claims description 6
- 238000001471 micro-filtration Methods 0.000 claims description 6
- 230000001376 precipitating effect Effects 0.000 claims description 5
- 238000004659 sterilization and disinfection Methods 0.000 claims description 4
- 239000005909 Kieselgur Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000008394 flocculating agent Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000003599 detergent Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a cleaning agent regeneration method for an antirust surface cleaning process, which comprises the following steps: (1) adding a strong oxidant into the cleaning agent waste liquid to be regenerated; (2) sending the sterilized and disinfected waste cleaning agent liquid into a strong magnetic separation device to obtain waste cleaning agent liquid without iron scraps; (3) adding a demulsifier into the scrap iron removing cleaning agent waste liquid, and stirring to obtain a waste liquid A; (4) adding an adsorbent into the waste liquid A, and stirring to obtain a waste liquid B; (5) adding a flocculating agent into the waste liquid B, stirring, standing for precipitation, and taking supernatant as waste liquid C; (6) coarsely filtering the waste liquid C by using a cloth bag filter to obtain coarsely filtered filtrate; (7) fine filtering the coarse filtration filtrate by using a fine filtering device to obtain fine filtration filtrate; (8) the fine filtering filtrate and the stock solution of the cleaning agent are mixed in a certain proportion and sent into a regeneration liquid box for recycling. The regeneration method of the cleaning agent can reduce the oil content and the conductivity of the regenerated cleaning solution, and can ensure that the regenerated cleaning solution has large yield and low cost in the production process.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a cleaning agent regeneration method for an antirust surface cleaning process.
Background
The metal surface cleaning agent is a water-soluble cleaning agent, is commonly used for high-pressure spray cleaning of the surface of a workpiece, and is necessary before spraying antirust paint on a steel workpiece to remove oil stains, dust, metal chips and the like.
The used cleaning agent waste liquid can be mixed with miscellaneous oil and impurities; the cleaning agent is emulsified by the emulsifier and is in a turbid state, and generally used as hazardous waste to be subjected to outcrop treatment, so that the treatment cost is extremely high; therefore, the cleaning agent needs to be recycled to reduce the cost. Because the surface cleaning requirement before spraying the antirust paint on the workpiece is high, the surface of the workpiece cannot have oil stains, and the salt content cannot exceed the standard, the regeneration and purification of the cleaning solution needs higher filtering precision than the purification of common cleaning solutions, and the oil content and the conductivity of the regenerated solution need to be strictly controlled.
The existing cleaning agent regeneration method mainly uses a filtration process as a main body, an ultrafiltration membrane or a ceramic membrane is often used for fine filtration, and due to the small filtration pore diameter, the filtration speed is slow, and the water yield is small; and in the use process, the membrane is easily blocked by oil stains and impurities, so that the water yield is gradually reduced, the backwashing effect is poor, and the long-term stable operation of the system is influenced. In addition, the waste liquid can be concentrated by adopting a low-temperature evaporation technology to obtain high-quality condensed water, but the method has higher cost and expensive equipment price.
Disclosure of Invention
The invention provides a cleaning agent regeneration method for an antirust surface cleaning process, which aims to overcome the difficulties of high purification degree, low yield and high price in the cleaning agent regeneration process.
In order to realize the purpose, the technical scheme of the invention is as follows:
a cleaning agent regeneration method for an antirust surface cleaning process comprises the following steps:
(1) standing and precipitating the cleaning agent waste liquid to be regenerated in an adjusting barrel, and adding a strong oxidant to perform pre-demulsification, sterilization and disinfection;
(2) sending the sterilized and disinfected waste cleaning agent liquid into a strong magnetic separation device to obtain waste cleaning agent liquid without iron scraps;
(3) adding a certain amount of demulsifier into the waste liquid without the iron scraps cleaning agent to perform demulsification, and uniformly stirring and mixing to obtain waste liquid A;
(4) adding a certain amount of adsorbent into the waste liquid A, and uniformly stirring to obtain a waste liquid B;
(5) adding a certain amount of flocculant into the waste liquid B, stirring, standing for precipitation, and taking supernatant as a waste liquid C after impurities are precipitated;
(6) performing coarse filtration on the waste liquid C through a cloth bag filter to obtain coarse filtration filtrate;
(7) fine filtering the coarse filtration filtrate by using fine filtering equipment to obtain fine filtration filtrate, and sending the fine filtration filtrate into a clear liquid barrel;
(8) the fine filtering filtrate in the clear liquid barrel and the stock solution of the cleaning agent are mixed according to a certain proportion and then sent into a regeneration liquid box for recycling.
Further, the strong oxidant in the step (1) is strong oxidizing gas, and a jet device is used for continuous feeding.
Further, the dosage of the demulsifier in the step (3) is 200ppm to 300 ppm.
Further, the adsorbent in the step (4) is diatomite; the dosage of the adsorbent is 200g/m3-400g/m3。
Further, the flocculant in the step (5) is a polymeric flocculant, the concentration of the flocculant solution is 0.1%, and the addition amount is 50ppm to 200 ppm.
Further, the filtering pore size of the cloth bag filter in the step (6) is 10-15 μm.
Further, the microfiltration equipment in the step (7) comprises a microfiltration machine and a precoated filter aid layer; the filter aid layer is prepared by mixing diatomite and water into slurry, performing circulating filtration through a precision filter, and forming a diatomite filter cake layer on the surface of a filter element of the filter, wherein the thickness of the precoated filter aid layer is 2-3 mm.
Furthermore, the aperture of the filter element of the precision filter is 3-5 μm.
Further, the cleaning agent stock solution and the fine filtration filtrate obtained in the step (7) are mixed according to the proportion of 1:40 to prepare regenerated cleaning solution.
Has the advantages that: the cleaning agent regeneration method for the rust-proof surface cleaning process solves the problems that high purification degree, low yield, high price and the like are difficult to meet in the cleaning agent regeneration process. The invention helps demulsification and flocculation through ozone preoxidation, and sterilizes and removes odor; adding a small amount of pretreatment process of adding chemicals to break emulsion before the cleaning liquid filtering process; reducing conductivity using diatomaceous earth as an adsorbent; the diatomite is used as a coagulant aid to accelerate the floc precipitation and compact the sludge, thereby reducing the sludge discharge times; the precision filter with the pre-coated diatomite filter aid is used as a fine filtering device, so that the filter element of the filter is prevented from being blocked while impurities are removed, and the long-term stable operation of a filtering system is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flowchart showing the steps of a method for regenerating a cleaning agent for cleaning a surface of a workpiece before spraying in accordance with embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
Specific example 1: as shown in fig. 1, a cleaning agent regeneration method for a rust inhibitive surface cleaning process comprises the following steps.
(1) Standing and precipitating the cleaning agent waste liquid to be regenerated in an adjusting barrel, and adding a strong oxidant to perform pre-demulsification, sterilization and disinfection;
(2) sending the sterilized and disinfected waste cleaning agent liquid into a strong magnetic separation device to obtain waste cleaning agent liquid without iron scraps;
(3) adding a certain amount of demulsifier into the waste liquid without the iron scraps cleaning agent to perform demulsification, and uniformly stirring and mixing to obtain waste liquid A;
(4) adding a certain amount of adsorbent into the waste liquid A, and uniformly stirring to obtain a waste liquid B;
(5) adding a certain amount of flocculant into the waste liquid B, stirring, standing for precipitation, and taking supernatant as waste liquid C after impurities are precipitated;
(6) performing coarse filtration on the waste liquid C through a cloth bag filter to obtain coarse filtration filtrate;
(7) fine filtering the coarse filtration filtrate by using fine filtering equipment to obtain fine filtration filtrate;
(8) and mixing the fine filtering filtrate in the clear liquid barrel and the cleaning agent stock solution in a certain proportion to obtain cleaning agent regeneration liquid, and sending the cleaning agent regeneration liquid into a regeneration liquid box for recycling.
According to the method, strong oxidant is added in the step (1), on one hand, the surfactant can be oxidized, partial demulsification is realized, and the effect of oil-water separation is achieved; on the other hand, the device has the effects of sterilization and disinfection, and prevents the waste liquid from smelling and deteriorating.
According to the method of the present invention, the strong oxidant gas added in step (1) is preferably continuously added with ozone using an ejector.
According to the method, the dosage of the demulsifier added in the step (3) is 200ppm to 300 ppm. For example, 200ppm, 220ppm, 240ppm, 260ppm, 280ppm and 300ppm, wherein the addition concentration of the demulsifier is preferably 240ppm, and the mixture is stirred for 5 minutes to be uniformly mixed; on the one hand, the demulsification effect is ensured, and on the other hand, the increase of the conductivity is reduced.
According to the method of the invention, the adsorbent in the step (4) is diatomite; the dosage of the adsorbent is 200g/m3-400g/m3. The diatomite adsorbs micro particles in the waste liquid, and the conductivity of the waste liquid is reduced. The added diatomite has the concentration of 200g/m3、250g/m3、300g/m3、350g/m3、400g/m3The preferred concentration of diatomaceous earth is 250g/m3And stirred for 20 minutes to mix well.
According to the method, the flocculant in the step (5) is a polymeric flocculant, the concentration of the flocculant solution is 0.1%, and the addition amount is 50ppm-200 ppm. And flocculating and precipitating suspended particles in the waste liquid B by using the polymeric flocculant. The addition amounts of the flocculant were 50ppm, 100ppm, 150ppm and 200 ppm. Preferably, 100ml of 0.1% polyacrylamide solution is added to 1m3In the cleaning agent waste liquid B. Preferably, the supernatant waste liquid C after standing and precipitating enters the next process, precipitates enter a waste water barrel through sludge discharge so as to be treated subsequently, and water lost in the sludge discharge process can be supplemented with the same amount of tap water in the clear water barrel so as to balance the conductivity increased by adding chemicals for demulsification.
According to the method, the filtering pore size of the cloth bag filter in the step (6) is 10-20 μm. Specifically, the cloth bag filter removes the remaining suspended particles in the precipitated waste liquid C; preferably, the filter pore size of the cloth bag filter is 10 μm.
According to the method of the invention, the microfiltration device in the step (7) comprises a microfiltration machine and a precoated filter aid layer; the filter aid layer is prepared by mixing diatomite and water into slurry, performing circulating filtration through a precision filter, and forming a diatomite filter cake layer on the surface of a filter element of the filter, wherein the thickness of the precoated filter aid layer is 2-3 mm.
Specifically, on one hand, the precoated filter aid layer can intercept impurities and improve the filtering effect; on the other hand can effectively reduce the filter core by impurity pollution, jam, avoided because the filter core blocks up the water yield that leads to reduce, equipment can not long-term steady operation scheduling problem, guarantee that the filter core can use for a long time.
Preferably, when the water yield of the precise filtering equipment is obviously reduced, water inlet is stopped, the precise filter is decompressed and drained, the filter cake layer falls off and is cleaned, and the filter cake layer is precoated with a new diatomite filter cake layer for continuous use. Preferably, 500-600 mesh diatomite is selected to prepare the pre-coated filter aid layer.
According to the method, the pore size of the precision filter element in the step (7) is 3-5 μm. Specifically, impurities with smaller particle size in the waste liquid are further removed while the water yield is ensured, and the conductivity and the oil content of the waste liquid are reduced. Preferably, the aperture of the filter element of the precision filter is 3 μm, and the working pressure is less than 0.6MPa for fine filtration.
According to the method, in the step (8), the cleaning agent stock solution and the fine filtration filtrate in the step (7) are mixed according to the proportion of 1:40 to prepare the regenerated cleaning solution. Specifically, the filtrate obtained after fine filtration is sent into a clear liquid barrel, and a cleaning agent stock solution is added according to a certain proportion, so that the filtrate can be sent into a regeneration liquid tank for recycling after reaching the industrial standard; preferably, the ratio of the supplemented cleaning agent stock solution to the fine filtration filtrate is 1: 40.
Preferably, the cleaning agent regeneration liquid obtained after the post-treatment is detected, and the detection contents comprise appearance color, concentration, pH value and the like. These detection standards and detection methods are prior art and therefore are not described in detail in the examples.
Table 1 shows the comparison of various test parameters between the detergent regeneration liquid of the rust-preventive surface cleaning process obtained by the detergent regeneration method of the present invention, the detergent waste liquid, and the detergent standard.
As can be seen from table 1, the performance of the cleaning agent regeneration liquid obtained by the cleaning agent regeneration method of the present embodiment meets the use standard, and the quality of the cleaning agent can be further improved; meanwhile, the recovery rate of the cleaning agent regeneration liquid obtained by the cleaning agent regeneration method is as high as more than 90%.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A cleaning agent regeneration method for an antirust surface cleaning process is characterized by comprising the following steps:
(1) standing and precipitating the cleaning agent waste liquid to be regenerated in an adjusting barrel, and adding a strong oxidant to perform pre-demulsification, sterilization and disinfection;
(2) sending the sterilized and disinfected waste cleaning agent liquid into a strong magnetic separation device to obtain waste cleaning agent liquid without iron scraps;
(3) adding a certain amount of demulsifier into the waste liquid without the iron scraps cleaning agent to perform demulsification, and uniformly stirring and mixing to obtain waste liquid A;
(4) adding a certain amount of adsorbent into the waste liquid A, and uniformly stirring to obtain a waste liquid B;
(5) adding a certain amount of flocculant into the waste liquid B, stirring, standing for precipitation, and taking supernatant as waste liquid C after impurities are precipitated;
(6) performing coarse filtration on the waste liquid C through a cloth bag filter to obtain coarse filtration filtrate;
(7) fine filtering the coarse filtration filtrate by using fine filtering equipment to obtain fine filtration filtrate, and sending the fine filtration filtrate into a clear liquid barrel;
(8) the fine filtering filtrate in the clear liquid barrel and the stock solution of the cleaning agent are mixed according to a certain proportion and then sent into a regeneration liquid box for recycling.
2. The regeneration method according to claim 1, wherein the strong oxidant in step (1) is a strong oxidizing gas, and is continuously fed using an ejector.
3. The regeneration method according to claim 1, wherein the demulsifier is added in the amount of 200ppm to 300ppm in step (3).
4. The regeneration method according to claim 1, wherein the adsorbent in the step (4) is diatomaceous earth; the dosage of the adsorbent is 200g/m3-400 g/m3。
5. The regeneration method of claim 1, wherein the flocculant in step (5) is a polymeric flocculant, the concentration of the flocculant solution is 0.1%, and the addition amount is 50ppm to 200 ppm.
6. The regeneration method according to claim 1, wherein the filtration pore size of the cloth bag filter in the step (6) is 10-20 μm.
7. The regeneration method according to claim 1, wherein the microfiltration apparatus in step (7) comprises a microfiltration filter and a precoated filter aid layer; the filter aid layer is prepared by mixing diatomite and water into slurry, performing circulating filtration through a precision filter, and forming a diatomite filter cake layer on the surface of a filter element of the filter, wherein the thickness of the precoated filter aid layer is 2-3 mm.
8. The regeneration process of claim 7, wherein the fine filter cartridge has a pore size of 3-5 μm.
9. The regeneration method of claim 1, wherein the cleaning agent stock solution and the fine filtration filtrate obtained in the step (7) are mixed in a ratio of 1:40 to prepare a regeneration cleaning solution.
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| CN115072906A (en) * | 2022-07-20 | 2022-09-20 | 江苏丰东热处理及表面改性工程技术研究有限公司 | Method for recycling heat treatment cleaning liquid |
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| US4797214A (en) * | 1987-07-07 | 1989-01-10 | Vincent Saputo | Method of treatment of waste streams of oil/water emulsions or solutions |
| CN102259995A (en) * | 2011-07-05 | 2011-11-30 | 甘肃省膜科学技术研究院 | Integrated treatment process for processing rural standard exceeding drinking-water |
| CN102718357A (en) * | 2012-06-01 | 2012-10-10 | 上海穆特环保科技有限公司 | O3-BAC water treatment process and matched drinking water treatment device thereof |
| CN104003551A (en) * | 2014-05-24 | 2014-08-27 | 安徽众源新材料股份有限公司 | Waste emulsified liquid treatment method |
| CN104261617A (en) * | 2014-09-18 | 2015-01-07 | 南京理工大学 | Treatment method of waste emulsion |
| CN111575123A (en) * | 2019-07-31 | 2020-08-25 | 河北金力新能源科技股份有限公司 | Special cleaning agent for ceramic anilox roller and preparation method and application thereof |
| CN111423012A (en) * | 2020-03-27 | 2020-07-17 | 天津绿展环保科技有限公司 | Rapid recycling method for cleaning waste liquid produced by iron drum crushing and cleaning system |
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| CN115072906A (en) * | 2022-07-20 | 2022-09-20 | 江苏丰东热处理及表面改性工程技术研究有限公司 | Method for recycling heat treatment cleaning liquid |
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