CN114538693B - Cleaning agent regeneration method for rust-proof surface cleaning process - Google Patents
Cleaning agent regeneration method for rust-proof surface cleaning process Download PDFInfo
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- CN114538693B CN114538693B CN202210247700.5A CN202210247700A CN114538693B CN 114538693 B CN114538693 B CN 114538693B CN 202210247700 A CN202210247700 A CN 202210247700A CN 114538693 B CN114538693 B CN 114538693B
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- 239000012459 cleaning agent Substances 0.000 title claims abstract description 60
- 238000011069 regeneration method Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004140 cleaning Methods 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 79
- 238000001914 filtration Methods 0.000 claims abstract description 55
- 239000002699 waste material Substances 0.000 claims abstract description 52
- 239000000706 filtrate Substances 0.000 claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000008929 regeneration Effects 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 239000003463 adsorbent Substances 0.000 claims abstract description 11
- 230000001590 oxidative effect Effects 0.000 claims abstract description 10
- 239000011550 stock solution Substances 0.000 claims abstract description 9
- 239000004744 fabric Substances 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000007800 oxidant agent Substances 0.000 claims abstract description 8
- 238000001556 precipitation Methods 0.000 claims abstract description 6
- 239000006228 supernatant Substances 0.000 claims abstract description 6
- 238000004064 recycling Methods 0.000 claims abstract description 5
- 238000007885 magnetic separation Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 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 13
- 239000012535 impurity Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 9
- 239000012065 filter cake Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 5
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 238000004659 sterilization and disinfection Methods 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 4
- 239000002245 particle Substances 0.000 description 4
- 238000000746 purification Methods 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
- 239000005909 Kieselgur Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 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
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 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
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 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
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 waste liquid of the cleaning agent to be regenerated; (2) Sending the sterilized and disinfected cleaning agent waste liquid into strong magnetic separation equipment to obtain iron filings removing cleaning agent waste liquid; (3) Adding a demulsifier into the scrap iron cleaning agent waste liquid, and stirring to obtain waste liquid A; adding an adsorbent into the waste liquid A, and stirring to obtain 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) Coarse filtering the waste liquid C by a cloth bag filter to obtain coarse filtering filtrate; (7) Fine filtering the coarse filtering filtrate by a fine filtering device to obtain fine filtering filtrate; (8) Mixing the fine filtration filtrate and the cleaning agent stock solution in a certain proportion, and sending the mixture into a regeneration liquid tank for recycling. The cleaning agent regeneration method can reduce the oil content and the conductivity of the regenerated cleaning agent, and simultaneously can ensure that the regenerated cleaning agent has high yield and low production process price.
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 the steel workpiece is sprayed with antirust paint.
The used cleaning agent waste liquid can be mixed with impurity oil and impurities; the cleaning agent is emulsified by the emulsifying agent and is in a turbid state, and is generally used as an external support for dangerous waste to be treated, 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, oil stains cannot exist on the surface of the workpiece, and the salt content cannot exceed the standard, the cleaning liquid regeneration and purification needs higher filtering precision than the general cleaning liquid purification, and the oil content and the conductivity of the regeneration liquid need to be strictly controlled.
At present, the cleaning agent regeneration method mainly takes a filtering process as a main body, an ultrafiltration membrane or a ceramic membrane is often used for fine filtration, and the filtering speed is low and the water yield is small due to small filtering pore diameter; in addition, the membrane is easily blocked by oil stains and impurities in the use process, so that the water yield is gradually reduced, and the backwashing effect is poor, so that 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 high equipment price.
Disclosure of Invention
The invention provides a cleaning agent regeneration method for an antirust surface cleaning process, which aims to overcome the difficulty that the cleaning agent is difficult to meet high purification degree, small in yield and high in price in the cleaning agent regeneration process.
In order to achieve the above object, the technical scheme of the present invention is as follows:
a cleaning agent regeneration method for an antirust surface cleaning process comprises the following steps:
(1) Standing and precipitating the waste liquid of the cleaning agent 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 cleaning agent waste liquid into strong magnetic separation equipment to obtain iron filings removing cleaning agent waste liquid;
(3) Adding a certain amount of demulsifier into the waste liquid of the iron filings removing cleaning agent to demulsifie, 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 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 when impurities precipitate;
(6) Coarse filtering the waste liquid C through a cloth bag filter to obtain coarse filtering filtrate;
(7) Fine filtering the coarse filtering liquid through fine filtering equipment to obtain fine filtering liquid, and feeding the fine filtering liquid into a clear liquid barrel;
(8) The fine filtration filtrate in the clear liquid barrel and the cleaning agent stock solution 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 a strong oxidizing gas, and the strong oxidizing gas is continuously added by using an ejector.
Further, the adding amount of the demulsifier in the step (3) is 200ppm-300ppm.
Further, the adsorbent in the step (4) is diatomite; the adding amount of the adsorbent is 200g/m 3 -400g/m 3 。
Further, the flocculant in the step (5) is a polymeric flocculant, the concentration of the flocculant solution is 0.1%, and the adding amount is 50ppm-200ppm.
Further, the filtering pore diameter of the cloth bag filter in the step (6) is 10-15 mu m.
Further, the precise filtering device in the step (7) comprises a precise filter and a precoating filter aid layer; the filter aid layer is prepared by mixing diatomite and water to form slurry, circularly filtering the slurry by 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 2-3mm.
Further, the pore diameter of the filter element of the precision filter is 3-5 mu m.
Further, 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.
The beneficial effects are that: the cleaning agent regeneration method for the rust-proof surface cleaning process solves the problems that the cleaning agent regeneration process is difficult to meet the requirements of high purification degree, small yield, high price and the like. The invention helps demulsification and flocculation through ozone pre-oxidation, and disinfects and removes odor; a pretreatment process of adding a small amount of chemicals to break emulsion is added before a cleaning liquid filtering process; the diatomite is used as an adsorbent to reduce the conductivity; diatomite is used as coagulant aid to accelerate the flocculation precipitation and compact the sludge, so that the sludge discharge times are reduced; the precise filter precoated with the diatomite filter aid is used as precise filtering equipment, so that the filter core is prevented from being blocked while impurities are removed, and the long-term stable operation of the filtering system is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a flow chart showing the steps of a method for regenerating a cleaning agent for cleaning a surface of a workpiece before spraying in accordance with example 1 of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Specific example 1: as shown in fig. 1, a cleaning agent regeneration method for an antirust surface cleaning process includes the following steps.
(1) Standing and precipitating the waste liquid of the cleaning agent 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 cleaning agent waste liquid into strong magnetic separation equipment to obtain iron filings removing cleaning agent waste liquid;
(3) Adding a certain amount of demulsifier into the waste liquid of the iron filings removing cleaning agent to demulsifie, 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 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 when impurities precipitate;
(6) Coarse filtering the waste liquid C through a cloth bag filter to obtain coarse filtering filtrate;
(7) Fine filtering the coarse filtering filtrate by a fine filtering device to obtain fine filtering filtrate;
(8) The fine filtration filtrate in the clear liquid barrel and the cleaning agent stock solution are mixed according to a certain proportion to obtain cleaning agent regeneration liquid, and the cleaning agent regeneration liquid is sent into a regeneration liquid tank for recycling.
According to the method, the strong oxidant is added in the step (1), so that on the one hand, the surfactant can be oxidized, and partial demulsification is realized, and the effect of oil-water separation is achieved; on the other hand, the sterilizing and disinfecting functions are realized, and the waste liquid is prevented from being smelly and spoiled.
According to the method of the present invention, the strong oxidizer gas added in step (1) is preferably continuously fed with ozone using an ejector.
According to the method of the invention, the adding amount of the demulsifier in the step (3) is 200ppm-300ppm. For example, 200ppm, 220ppm, 240ppm, 260ppm, 280ppm and 300ppm, and the adding concentration of the demulsifier is preferably 240ppm, and stirring is carried out for 5 minutes to uniformly mix; 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 present invention, the adsorbent in the step (4) is diatomaceous earth; the adding amount of the adsorbent is 200g/m 3 -400g/m 3 . The diatomite adsorbs tiny particles in the waste liquid, so that the conductivity in the waste liquid is reduced. The concentration of the added diatomite is 200g/m 3 、250g/m 3 、300g/m 3 、350g/m 3 、400g/m 3 The preferred concentration of diatomaceous earth is 250g/m 3 And stirred for 20 minutes to mix well.
According to the method of the invention, the flocculant in the step (5) is a polymeric flocculant, the concentration of the flocculant solution is 0.1%, and the adding amount is 50ppm-200ppm. The polymer flocculant flocculates and precipitates suspended particles in the waste liquid B. The addition amount of the flocculant is 50ppm, 100ppm, 150ppm and 200ppm. Preferably, 100ml of 0.1% polypropylene is usedAmide solution addition 1m 3 Is a waste liquid B of the cleaning agent. Preferably, the supernatant liquid C after standing and precipitation enters the next procedure, the precipitate enters a wastewater barrel through mud discharge for subsequent treatment, and the water lost in the mud discharge process can supplement the same amount of tap water in the supernatant barrel to balance the conductivity increased by adding drugs to demulsifie.
According to the method of the present invention, the filtration pore size of the cloth bag filter in the step (6) is 10-20 μm. Specifically, a cloth bag filter removes suspended particles remained 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 present invention, the fine filtration apparatus in the step (7) comprises a fine filter and a precoated filter aid layer; the filter aid layer is prepared by mixing diatomite and water to form slurry, circularly filtering the slurry by 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 2-3mm.
Specifically, the pre-coating filter aid layer can entrap impurities on one hand and improve the filtering effect; on the other hand can effectively reduce the filter core by impurity pollution, the 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 inflow is stopped, the precise filter is decompressed and drained, the filter cake layer is removed and cleaned, and the filter cake layer is precoated with a new diatomite filter cake layer again and then is used continuously. Preferably, the precoating filter aid layer is prepared by selecting 500-600 meshes of diatomite.
According to the method of the present invention, the pore size of the filter element of the precision filter 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 pore diameter of the filter element of the precision filter is 3 mu m, and the working pressure is less than 0.6MPa for precision filtration.
According to the method of the invention, in the step (8), the cleaning agent stock solution and the fine filtration filtrate in the step (7) are mixed according to the ratio of 1:40 to prepare the regenerated cleaning solution. Specifically, the filtrate obtained after fine filtration is sent into a clear liquid barrel, and cleaning agent stock solution is added according to a certain proportion, and the filtrate can be sent into a regenerated liquid box for recycling after reaching the industry 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 content comprises appearance color, concentration, pH value and the like. These detection criteria and detection methods are well known in the art and are therefore not described in detail in the examples.
Table 1 shows the comparison of various test parameters between the cleaning agent regeneration liquid and the cleaning agent waste liquid and cleaning agent standard of the rust-proof surface cleaning process obtained by the cleaning agent regeneration method of the invention.
As can be seen from table 1, the performance of the cleaning agent regeneration liquid obtained by the cleaning agent regeneration method of this embodiment meets the use standard, and the quality of the cleaning agent can be further improved; meanwhile, the recovery rate of the cleaning agent regenerated liquid obtained by the cleaning agent regeneration method can reach more than 90%.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (5)
1. The cleaning agent regeneration method for the rust-proof surface cleaning process is characterized by comprising the following steps of:
(1) Standing and precipitating the waste liquid of the cleaning agent 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 cleaning agent waste liquid into strong magnetic separation equipment to obtain iron filings removing cleaning agent waste liquid;
(3) Adding a certain amount of demulsifier into the waste liquid of the iron filings removing cleaning agent to demulsifie, 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 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 when impurities precipitate;
(6) Coarse filtering the waste liquid C through a cloth bag filter to obtain coarse filtering filtrate;
(7) Fine filtering the coarse filtering liquid through fine filtering equipment to obtain fine filtering liquid, and feeding the fine filtering liquid into a clear liquid barrel;
(8) Mixing the fine filtration filtrate in the clear liquid barrel with the cleaning agent stock solution in a certain proportion, and sending the mixture into a regeneration liquid tank for recycling;
the strong oxidant in the step (1) is strong oxidizing gas, and an ejector is used for continuous feeding; the adding amount of the demulsifier in the step (3) is 200ppm-300ppm; the adsorbent in the step (4) is diatomite; the adding amount of the adsorbent is 200g/m 3 -400 g/m 3 。
2. The regeneration method according to claim 1, wherein the filtration pore size of the bag filter in the step (6) is 10 to 20 μm.
3. The regeneration method according to claim 1, wherein the fine filtration device in the step (7) comprises a fine filter and a precoated filter aid layer; the filter aid layer is prepared by mixing diatomite and water to form slurry, circularly filtering the slurry by 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 2-3mm.
4. A regeneration process according to claim 3, characterized in that the pore size of the fine filter cartridge is 3-5 μm.
5. The regeneration method according to claim 1, wherein the cleaning agent stock solution and the fine filtration filtrate in the step (7) are mixed in a ratio of 1:40 to prepare a regenerated 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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