CN102260028A - Pretreatment method and pretreatment system for cold-rolling tempering lubricant wastewater - Google Patents
Pretreatment method and pretreatment system for cold-rolling tempering lubricant wastewater Download PDFInfo
- Publication number
- CN102260028A CN102260028A CN 201110207025 CN201110207025A CN102260028A CN 102260028 A CN102260028 A CN 102260028A CN 201110207025 CN201110207025 CN 201110207025 CN 201110207025 A CN201110207025 A CN 201110207025A CN 102260028 A CN102260028 A CN 102260028A
- Authority
- CN
- China
- Prior art keywords
- air
- tank
- wastewater
- cold rolling
- dissolving
- 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.)
- Pending
Links
Images
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a pretreatment method and a pretreatment system for cold-rolling tempering lubricant wastewater. The method comprises the following steps: introducing the cold-rolling tempering lubricant wastewater into a conditioning tank; adjusting the pH value of the tempering lubricant wastewater to below 6; adding a polymer coagulant aid for coagulation; adding 5 mg/L of 1 per mill PAM (polyacrylamide) used as a coagulant; carrying out dissolved air flotation to remove oil and suspended solids so that the CODcr (chemical oxygen demand) of the effluent is not larger than 10000 mg/L; then introducing the effluent into the regulating tank of a biochemical treatment system for mixing with other oily wastewater; and introducing the effluent the CODcr of which is no larger than 2000 mg/L from the regulating tank into a contact oxidation system. The pretreatment system is characterized in that the lower part of the conditioning tank is connected with a pH regulating tank through a lifting pump of the conditioning tank; the upper part of the pH regulating tank is connected with the upper part of a coagulation tank; the upper part of the coagulation tank is connected with the upper part of a dissolved air flotation device; and the upper part of the dissolved air flotation device is connected with the upper part of an intermediate water tank. Compared with traditional treatment manners, the pretreatment system provided by the invention has the advantages of small occupation area, low one-time investment, low production and operation cost and stable treatment effect, is simple to run and operate, and can realize fully automatic control.
Description
Technical field
The invention belongs to field of waste water treatment, specifically relate to a kind of cold rolling levelling liquor pretreatment method for wastewater and system thereof.
Background technology
Cold rolled strip at steel industry is handled on the line, has higher planeness, smooth finish for making cold rolled strip, is provided with formation process in rolling process; Formation process need utilize smooth liquid to reach the effect that improves smooth effect, and the waste water that is produced in this process is called smooth liquid waste water.Along with the further raising to indexs such as planeness, reached this purpose by the quality that improves smooth liquid in the operation of rolling in recent years, then chemical property is more stable for the smooth liquid waste water of Chan Shenging therefrom, is difficult to handle.
The main component of smooth liquid is the mixture of organic alcohol amine, organic bases and pure water, and by organic bases make solution be alkalescence, thereby make it to form solution stable, uniform emulsified state, apparent is the light yellow liquid that is transparent, the smooth liquid COD value of waste water of discharging up to 30000-50000mg/L.
As shown in Figure 2, smooth traditionally liquid waste water is classified as oily(waste)water, brings the oil-contained waste water treatment system at cold rolling wastewater station into and handles.Its main treatment process is: smooth liquid waste water and other cold rolling oily(waste)waters all with, through technologies such as ultrafiltration, biochemical treatment.
But effluent COD concentration height, fluctuation through this art breading are big, and effluent quality is uncontrollable; And facility investment is big, exists following shortcomings:
1, molecular weight can only be tackled greater than 5000 material in the aperture of ultra-filtration membrane in the ultra-filtration equipment, and smooth liquid main component is the small molecules polymkeric substance, and molecular weight is between 170-500.Fatty Alcohol(C12-C14 and C12-C18) in the smooth liquid waste water can enter the bio-contact oxidation system with the ultrafiltration infiltration water by the ultrafiltration fenestra, makes the COD concentration that enters the bio-contact oxidation system at 5000-7000mg/L; And the influent waste water COD burden requirement of bio-contact oxidation system is lower than 2000mg/L.
2, ultra-filtration equipment has the processing efficiency advantages of higher as at the oily(waste)water of handling high density; The ultrafiltration of being disposed for smooth liquid waste water is difficult to play the purpose of processing, but for this reason and the ultra-filtration equipment of configuration, higher (550,000 yuans/m of one-time investment
3﹒ h), running cost is also high.
3, after smooth liquid and emulsion mix, shortened the work period of ultrafiltration greatly, operation, production management complexity.
Therefore be necessary to seek a kind of pretreatment technology of simple and easy practicality, make smooth liquid waste water, reach the requirement that inserts biochemical treatment system, and then include biochemical processing process in and handle earlier through preliminary treatment.
Summary of the invention
Task of the present invention provides a kind of cold rolling levelling liquor pretreatment method for wastewater and system thereof, it has overcome the difficulty of prior art, its water outlet CODcr≤10000mg/L, in equalizing tank, behind the thorough mixing, make the CODcr≤2000mg/L that enters biochemical treatment system, lower than traditional processing mode one-time investment, the production run cost is low, treatment effect is stable, and the operation operation is easy, can realize full automatic control.
Technical solution of the present invention is as follows:
A kind of cold rolling levelling liquor pretreatment method for wastewater may further comprise the steps:
(1) smooth liquid waste water is imported equalizing tank;
(2) regulate below the pH value to 6 of smooth liquid waste water;
(3) add polymer coagulant aids coagulation; Select for use 1 ‰ PAM as coagulating agent, dosage is 5mg/L;
(4) air-dissolving air-float is removed grease and suspended substance, makes water outlet CODcr≤10000mg/L;
(5) entering biochemical treatment system equalizing tank and other oily(waste)waters mixes;
(6) equalizing tank water outlet CODcr≤2000mg/L enters the catalytic oxidation system.
Control gas-water ratio 0.04 ﹕ 1 ~ 0.08 ﹕ 1 in the described step (4), return of waste water be than 25% ~ 40%, 0.5 ~ 0.6 hour residence time.
Also comprise in the described step (4) oil slick being scraped and enter slag chute recycling by Oil and slag scraping machine.
A kind of cold rolling levelling liquor Wastewater Pretreatment system comprises: adjust pond, equalizing tank lift pump, two stirrers, pH and adjust jar, coagulation tank, air-dissolving air-float, dissolving, dissolved air water pump and intermediate pool;
The bottom in described adjustment pond connects pH by the equalizing tank lift pump and adjusts jar, described pH adjusts the top of the top connection coagulation tank of jar, the top of described coagulation tank connects the top of air-dissolving air-float, described dissolving connects the bottom of coagulation tank and the bottom that connects air-dissolving air-float by the dissolved air water pump respectively, the top of described air-dissolving air-float connects the top of intermediate pool, and the bottom of described intermediate pool connects the biochemical treatment system equalizing tank.
Described pH adjusts in jar and the coagulation tank and respectively is provided with a stirrer.
Described air-dissolving air-float top is provided with an Oil and slag scraping machine.
Described intermediate pool connects the biochemical treatment system equalizing tank by an intermediate pool lift pump.
The present invention is owing to adopted above technical scheme, make it compared with prior art, cold rolling levelling liquor pretreatment method for wastewater provided by the invention and system thereof have improved security and stability, the reliability of the operation of water treatment system by the configuration of system, have reduced the day-to-day operation maintenance cost.
After cold rolling levelling liquor waste water process pH adjustment, coagulation, the air supporting pre-treatment, can include follow-up biochemical processing process in.The present invention is based on analysis to smooth liquid waste water physics, chemical property, overcome traditional technology to the shortcoming of operation operation and daily operation management requirement height, poor stability, the high existence of one-time investment with not enough, pointed strong, treatment effect is stable, the production run cost is low and the operation operation is easy pretreatment technology has been proposed.
Pretreatment process of the present invention and system thereof have small accommodation area, one-time investment is low, treatment effect is stable, the production run cost is low and automated operation degree advantages of higher.
Description of drawings
Fig. 1 is the schema of cold rolling levelling liquor pretreatment method for wastewater of the present invention.
Fig. 2 is the schematic diagram of a kind of smooth liquid method of wastewater treatment of prior art.
Fig. 3 is the process flow sheet of cold rolling levelling liquor pretreatment method for wastewater of the present invention.
Fig. 4 is the structure interface chart of cold rolling levelling liquor Wastewater Pretreatment of the present invention system.
Reference numeral:
1 for adjusting the pond, and 2 is the equalizing tank lift pump, and 3 is stirrer, and 4 for pH adjusts jar, and 5 is coagulation tank, and 6 is air-dissolving air-float, and 7 is Oil and slag scraping machine, and 8 is dissolving, and 9 is the dissolved air water pump, and 10 is intermediate pool, and 11 is the intermediate pool lift pump.
Embodiment
Below in conjunction with drawings and Examples the present invention is elaborated.
Referring to Fig. 1, the invention provides a kind of cold rolling levelling liquor pretreatment method for wastewater, may further comprise the steps:
(1) smooth liquid waste water is imported equalizing tank.
(2) regulate below the pH value to 6 of smooth liquid waste water.
(3) add polymer coagulant aids coagulation.Select for use 1 ‰ PAM as coagulating agent, dosage is 5mg/L.
(4) air-dissolving air-float is removed grease and suspended substance, makes water outlet CODcr≤10000mg/L.Control gas-water ratio 0.04 ﹕ 1 ~ 0.08 ﹕ 1, return of waste water be than 25% ~ 40%, 0.5 ~ 0.6 hour residence time.
(5) entering biochemical treatment system equalizing tank and other oily(waste)waters mixes.
(6) equalizing tank water outlet CODcr≤2000mg/L enters the catalytic oxidation system.
Also comprise in the described step (4) oil slick being scraped and enter slag chute recycling by Oil and slag scraping machine.By the Oil and slag scraping machine on air flotation pool water body top layer, oil slick scraped enter slag chute recycling.
Referring to Fig. 4, the present invention also provides a kind of cold rolling levelling liquor Wastewater Pretreatment system, and mainly pond 1, equalizing tank lift pump 2, two stirrers 3, pH adjust jars 4 by adjusting, coagulation tank 5, air-dissolving air-float 6, dissolving 8, dissolved air water pump 9 and intermediate pool 10 are formed.
Adjust the bottom in pond 1 and pass through equalizing tank lift pump 2 connection pH adjustment jars 4, pH adjusts the top of the top connection coagulation tank 5 of jar 4, the top of the top connection air-dissolving air-float 6 of coagulation tank 5.Dissolving 8 connects the bottom of coagulation tank 5 and the bottom that connects air-dissolving air-float 6 by dissolved air water pump 9 respectively.The top of air-dissolving air-float 6 connects the top of intermediate pool 10, and the bottom of intermediate pool 10 connects the biochemical treatment system equalizing tank., the grease of free state is condensed, assemble the waste water dosing coagulant by coagulation tank, be present in the water with oily or solid-state form.
In pH adjusts jar 4 and coagulation tank 5, a stirrer 3 is set respectively.On air-dissolving air-float 6 tops an Oil and slag scraping machine 7 is set.Intermediate pool 10 connects the biochemical treatment system equalizing tank by an intermediate pool lift pump 11.
Referring to Fig. 3, cold rolling levelling liquor pretreatment method for wastewater of the present invention comprises steps such as pH adjustment, coagulation and air-dissolving air-float processing.By above-mentioned treatment step, guarantee that smooth liquid waste water reaches the requirement that enters the biochemical treatment system equalizing tank, be that the smooth liquid waste water of CODcr≤10000mg/L(mixes even with other oily(waste)waters in the biochemical treatment system equalizing tank, make the CODcr that enters the catalytic oxidation system≤2000mg/L), alleviate its impact load, for good condition is created in the steady running of biochemical treatment to biochemical treatment.
PH adjusts by pH instrument control pneumatic adjusting valve, regulates the dosage of hydrochloric acid, makes the pH value be controlled at 4～6.At this reference mark, the organic acid and the lipid acid that are dissolved in the waste water can decompose fully with water, grease with a kind of free state floats in the water, therefore in pre-treatment, smooth liquid waste water is carried out acidification, can abolish the stability of emulsion in the smooth liquid waste water, lipid acid and water in the water are decomposed fully.
Coagulating treatment adopts 1 ‰ polymer coagulant aids PAM, and dosage is 1～10mg/L, and preferred dosage is 5mg/L., the grease of free state is condensed, assemble the waste water dosing coagulant by coagulation tank, be present in the water with oily or solid-state form.
Air-dissolving air-float is a partial reflux formula air-dissolving air-float, be characterized in taking up an area of little, energy-conservation, efficient is high.Main technologic parameters is selected: gas-water ratio 0.04 ﹕ 1 ~ 0.12 ﹕ 1, return of waste water be than 25% ~ 45%, 0.5 ~ 0.8 hour residence time; Preferred gas-water ratio 0.04 ﹕ 1 ~ 0.08 ﹕ 1, return of waste water be than 25% ~ 40%, 0.5 ~ 0.6 hour residence time.Water inlet CODcr:30000-50000mg/L, after above-mentioned technology pre-treatment, water outlet CODcr≤10000mg/L.Pass through air-dissolving air-float, the microbubble that in air flotation pool, produces quickened with water decomposition after the greasy come-up of coagulation (improving greasy clearance in the water more effectively), by the Oil and slag scraping machine on air flotation pool water body top layer, oil slick scraped enter slag chute recycling.
According to cold rolling levelling liquor pretreatment method for wastewater of the present invention, one of them preferred embodiment is: select 1 ‰ PAM(polymer coagulant aids in the described coagulating treatment step for use) as coagulating agent, dosage is 5mg/L, preferred gas-water ratio 0.04 ﹕ 1 ~ 0.08 ﹕ 1, return of waste water is than 25% ~ 40%, 0.5 ~ 0.6 hour residence time, dosing coagulant before the air supporting, waste water can be removed surperficial oil slick and a part of dissolving oil through coagulation, air supporting.
In conjunction with referring to Fig. 4, cold rolling levelling liquor wastewater preprocessing process of the present invention is as follows:
Cold rolling wastewater enters adjusts pond 1, water quality, the water yield all and afterwards are promoted to pH adjustment jar 4 by equalizing tank lift pump 2, adjust jars 4 through pH the pH value of waste water is controlled at below 6, the waste water after the adjusting flows automatically and enters coagulation tank 5, and controlling 1 ‰ polymer coagulant aids PAM dosage is 5mg/L.Make the grease of free state condense, assemble by coagulation tank to the waste water dosing coagulant, be present in the water effect of strengthening subsequent air-dissolving air-float with oily or solid-state form.Coagulation tank 5 and air-dissolving air-float 6 are for being wholely set, the coagulation water outlet enters air-dissolving air-float 6 by the water eliminator bottom, and recirculation water is taken out from dissolving 8 by dissolved air water pump 9 self-dissolving gas air supportings 6 bodies, control gas-water ratio 0.04 ﹕ 1 ~ 0.08 ﹕ 1, return of waste water is than 25% ~ 40%, 0.5 ~ 0.6 hour residence time.Remove wherein oil content, part suspended substance, make water outlet CODcr≤10000mg/L.Air-dissolving air-float 6 water outlets then are promoted to the biochemical treatment system equalizing tank by intermediate pool lift pump 11 from flowing into intermediate pool 10, and behind the thorough mixing, biochemical treatment system equalizing tank water outlet CODcr≤2000mg/L enters subsequent treatment process in equalizing tank.
Cold rolling levelling liquor pretreatment method for wastewater of the present invention and system thereof can be applied to all cold rolling levelling liquor Waste Water Treatments.Data before and after the cold rolling levelling liquor Wastewater Pretreatment lattice of tabulating as follows:
In sum; cold rolling levelling liquor pretreatment method for wastewater of the present invention and system thereof combine closely physics, chemical treatment method; realization is handled the stable and mass-producing of the cold rolling levelling liquor waste water of high COD; its water outlet CODcr≤10000mg/L; in equalizing tank, behind the thorough mixing, make the CODcr≤2000mg/L that enters biochemical treatment system.Pretreatment process of the present invention and system thereof are than traditional processing mode, small accommodation area; One-time investment is low, and the production run cost is low; Treatment effect is stable, and the operation operation is easy, can realize full automatic control.
Use cold rolling levelling liquor pretreatment method for wastewater of the present invention and system thereof, effectively satisfying under the meticulous refrigerative prerequisite of cold rolled silicon steel, realized effective utilization of water resources, configuration by system, improve security and stability, the reliability of the operation of water treatment system, reduced the day-to-day operation maintenance cost.
Certainly, those skilled in the art in the present technique field will be appreciated that, the foregoing description only is to be used for illustrating the present invention, and be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claim of the present invention the variation of the foregoing description, modification etc.
Claims (7)
1. a cold rolling levelling liquor pretreatment method for wastewater is characterized in that, may further comprise the steps:
(1) smooth liquid waste water is imported equalizing tank;
(2) regulate below the pH value to 6 of smooth liquid waste water;
(3) add polymer coagulant aids coagulation; Select for use 1 ‰ PAM as coagulating agent, dosage is 5mg/L;
(4) air-dissolving air-float is removed grease and suspended substance, makes water outlet CODcr≤10000mg/L;
(5) entering biochemical treatment system equalizing tank and other oily(waste)waters mixes;
(6) equalizing tank water outlet CODcr≤2000mg/L enters the catalytic oxidation system.
2. cold rolling levelling liquor pretreatment method for wastewater as claimed in claim 1 is characterized in that: control gas-water ratio 0.04 ﹕ 1 ~ 0.08 ﹕ 1 in the described step (4), return of waste water be than 25% ~ 40%, 0.5 ~ 0.6 hour residence time.
3. cold rolling levelling liquor pretreatment method for wastewater as claimed in claim 1 is characterized in that: also comprise in the described step (4) by Oil and slag scraping machine oil slick being scraped entering slag chute recycling.
4. a cold rolling levelling liquor Wastewater Pretreatment system is characterized in that, comprising: adjust pond, equalizing tank lift pump, two stirrers, pH adjustment jar, coagulation tank, air-dissolving air-float, dissolving, dissolved air water pump and intermediate pool;
The bottom in described adjustment pond connects pH by the equalizing tank lift pump and adjusts jar, described pH adjusts the top of the top connection coagulation tank of jar, the top of described coagulation tank connects the top of air-dissolving air-float, described dissolving connects the bottom of coagulation tank and the bottom that connects air-dissolving air-float by the dissolved air water pump respectively, the top of described air-dissolving air-float connects the top of intermediate pool, and the bottom of described intermediate pool connects the biochemical treatment system equalizing tank.
5. cold rolling levelling liquor Wastewater Pretreatment as claimed in claim 4 system is characterized in that: described pH adjust jar and coagulation tank in respectively be provided with a stirrer.
6. cold rolling levelling liquor Wastewater Pretreatment as claimed in claim 4 system, it is characterized in that: described air-dissolving air-float top is provided with an Oil and slag scraping machine.
7. cold rolling levelling liquor Wastewater Pretreatment as claimed in claim 4 system is characterized in that: described intermediate pool connects the biochemical treatment system equalizing tank by an intermediate pool lift pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110207025 CN102260028A (en) | 2011-07-22 | 2011-07-22 | Pretreatment method and pretreatment system for cold-rolling tempering lubricant wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110207025 CN102260028A (en) | 2011-07-22 | 2011-07-22 | Pretreatment method and pretreatment system for cold-rolling tempering lubricant wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102260028A true CN102260028A (en) | 2011-11-30 |
Family
ID=45006902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110207025 Pending CN102260028A (en) | 2011-07-22 | 2011-07-22 | Pretreatment method and pretreatment system for cold-rolling tempering lubricant wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102260028A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071914A (en) * | 2013-03-30 | 2014-10-01 | 宝山钢铁股份有限公司 | Stainless steel leveling waste liquid recycling treatment method and system device thereof |
| CN104276719A (en) * | 2013-07-11 | 2015-01-14 | 宝钢工程技术集团有限公司 | Device used for purifying and recycling cold rolling waste water and application method thereof |
| CN105214651A (en) * | 2015-10-16 | 2016-01-06 | 上海纳米技术及应用国家工程研究中心有限公司 | A kind of preparation method of the ozone catalyst for the process of cold-rolled steel sheet leveling precision |
| CN106277426A (en) * | 2015-06-29 | 2017-01-04 | 宝山钢铁股份有限公司 | A kind of cold rolling diluted alkaline bio-chemical effluent deep treatment method and system |
| CN106977041A (en) * | 2016-01-19 | 2017-07-25 | 宝山钢铁股份有限公司 | A kind of processing method and processing unit for improving BOD in leveling precision waste water |
| CN108187915A (en) * | 2017-12-11 | 2018-06-22 | 新疆八钢铁股份有限公司 | With the method for cold rolling waste emulsified mixture coal slurry flotation |
| CN111036710A (en) * | 2018-10-15 | 2020-04-21 | 宝钢工程技术集团有限公司 | Leveling liquid recycling device and using method thereof |
| CN115231767A (en) * | 2022-06-16 | 2022-10-25 | 首钢京唐钢铁联合有限责任公司 | Treatment system and treatment method for leveling liquid wastewater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456646A (en) * | 2008-10-24 | 2009-06-17 | 麦王环保工程技术(上海)有限公司 | Cold rolling tempering lubricant waste water treatment device and treatment method thereof |
| CN202131172U (en) * | 2011-07-23 | 2012-02-01 | 宝钢工程技术集团有限公司 | Waste water pretreatment system for cold-rolling flattening liquid |
-
2011
- 2011-07-22 CN CN 201110207025 patent/CN102260028A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456646A (en) * | 2008-10-24 | 2009-06-17 | 麦王环保工程技术(上海)有限公司 | Cold rolling tempering lubricant waste water treatment device and treatment method thereof |
| CN202131172U (en) * | 2011-07-23 | 2012-02-01 | 宝钢工程技术集团有限公司 | Waste water pretreatment system for cold-rolling flattening liquid |
Non-Patent Citations (1)
| Title |
|---|
| 《工业水处理》 20100131 李善仁等 宝钢不锈钢冷轧厂光平整液废水处理系统 1－7 第30卷, 第1期 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071914A (en) * | 2013-03-30 | 2014-10-01 | 宝山钢铁股份有限公司 | Stainless steel leveling waste liquid recycling treatment method and system device thereof |
| CN104276719A (en) * | 2013-07-11 | 2015-01-14 | 宝钢工程技术集团有限公司 | Device used for purifying and recycling cold rolling waste water and application method thereof |
| CN104276719B (en) * | 2013-07-11 | 2016-01-20 | 宝钢工程技术集团有限公司 | For purification recovery device and the using method thereof of cold rolling wastewater |
| CN106277426A (en) * | 2015-06-29 | 2017-01-04 | 宝山钢铁股份有限公司 | A kind of cold rolling diluted alkaline bio-chemical effluent deep treatment method and system |
| CN106277426B (en) * | 2015-06-29 | 2019-08-27 | 宝山钢铁股份有限公司 | A kind of cold rolling diluted alkaline bio-chemical effluent deep treatment method and system |
| CN105214651A (en) * | 2015-10-16 | 2016-01-06 | 上海纳米技术及应用国家工程研究中心有限公司 | A kind of preparation method of the ozone catalyst for the process of cold-rolled steel sheet leveling precision |
| CN106977041A (en) * | 2016-01-19 | 2017-07-25 | 宝山钢铁股份有限公司 | A kind of processing method and processing unit for improving BOD in leveling precision waste water |
| CN108187915A (en) * | 2017-12-11 | 2018-06-22 | 新疆八钢铁股份有限公司 | With the method for cold rolling waste emulsified mixture coal slurry flotation |
| CN111036710A (en) * | 2018-10-15 | 2020-04-21 | 宝钢工程技术集团有限公司 | Leveling liquid recycling device and using method thereof |
| CN115231767A (en) * | 2022-06-16 | 2022-10-25 | 首钢京唐钢铁联合有限责任公司 | Treatment system and treatment method for leveling liquid wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102260028A (en) | Pretreatment method and pretreatment system for cold-rolling tempering lubricant wastewater | |
| CN105731706B (en) | Method and device for treating waste emulsion with extremely high concentration | |
| CN104556569A (en) | Method and system for treatment of oil shale distillation sewage | |
| CN106477809A (en) | A kind of method that caprolactam wastewater is processed | |
| CN103771652A (en) | Treatment method for waste water from processing acid-containing crude oil | |
| CN202297312U (en) | Cold rolling waste water treatment system | |
| CN102690018A (en) | Method for treating and recycling coal tar processing wastewater | |
| CN103408200A (en) | Cold rolling oily wastewater treatment process | |
| CN104944631A (en) | Pretreatment method of high-concentration cutting fluid sewage | |
| CN111138028A (en) | Automobile production wastewater treatment method and system | |
| CN104045209A (en) | Cold-rolling wastewater treatment method | |
| CN108529834A (en) | Method and device for treating high-concentration organic wastewater by Fenton-SMAD-BBR | |
| CN104150639A (en) | Treatment method of limestone-gypsum wet flue gas desulfurization waste water of steel sintering machine | |
| CN107572685B (en) | Treatment device and method for high-concentration waste emulsion | |
| CN109942150A (en) | A kind of waste vegetable oil utilizes the processing method of production waste water | |
| CN112939334A (en) | Recycling and treating method for cold-rolling wastewater containing acid, alkali and thick oil | |
| CN105174616A (en) | Treatment method of phenolic wastewater in production of sebacic acid | |
| CN202131172U (en) | Waste water pretreatment system for cold-rolling flattening liquid | |
| CN104926044A (en) | Cracking catalyst production wastewater treatment method | |
| CN108083557A (en) | A kind of concentration organic wastewater disposal process with high salt | |
| CN204111543U (en) | A kind of 2-Naphthol production wastewater treatment equipment | |
| CN207375865U (en) | A kind of processing unit of high-concentration waste emulsion | |
| CN202785898U (en) | Device for treating and recycling wastewater from processing of coal tar | |
| CN207468425U (en) | A kind of high-concentration emulsified liquid processing system | |
| CN110642433A (en) | Croton aldehyde wastewater treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111130 |