CN108911260A - A kind of waste emulsified mixture treatment process - Google Patents
A kind of waste emulsified mixture treatment process Download PDFInfo
- Publication number
- CN108911260A CN108911260A CN201810904893.0A CN201810904893A CN108911260A CN 108911260 A CN108911260 A CN 108911260A CN 201810904893 A CN201810904893 A CN 201810904893A CN 108911260 A CN108911260 A CN 108911260A
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- CN
- China
- Prior art keywords
- emulsified mixture
- water
- waste emulsified
- waste
- sedimentation basin
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- 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.)
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Classifications
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- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
Abstract
The invention discloses a kind of waste emulsified mixture treatment process, specifically include following steps：（1）Waste emulsified mixture water enters conditioning tank, and demulsifier is added and is demulsified, 28 ~ 32% greasy filth in waste emulsified mixture are separated；（2）Enter flotation tank after demulsification, air bearing water outlet enters sedimentation basin, NaOH liquid is added at flotation tank water inlet, emulsion pH is adjusted to neutrality, then according to emulsion type dose polymeric coagulant, cation or anionic flocculant, air-flotation process is carried out, after air bearing, is handled using 15 ~ 25 minutes water-oil separating floatings；（3）After dosing is chemically treated, the sludge of sedimentation basin discharge enters alkali oil Waste water concentrating pond after the water pressurization of sedimentation basin discharge through dredge pump and is directly handled into alkali oil waste water system.The present invention can directly handle waste emulsified mixture without ceramics or stainless steel ultrafiltration membrane, and treatment process facility is simple, and maintenance cost is lower, and application prospect is considerable, be suitble to promote.
Description
Technical field
The present invention relates to a kind of waste emulsified mixture treatment process, belong to Treatment of Industrial Water technical field.
Background technique
Rolling system waste emulsified mixture treatment process is commonly using ceramics or stainless steel ultrafiltration membrane, and waste emulsified mixture water at present
Matter is poor, and COD, oil content are higher, and Taiyuan Iron and Steel Co. rolling system emulsion uses stainless steel ultrafiltration membrane, processing capacity 20m3/ h, emulsification
Liquid water COD index 500-20000mg/l, oily 40-900mg/l, COD≤1500mg/l after processing, oil≤50mg/l, after processing
Emulsion be discharged into alkali oil wastewater equalization pond, together with alkali oil waste water after further treatment after, as industrial fresh water moisturizing reuse.
Treatment process is as shown in Figure 1, each steel rolling mill's waste emulsified mixture enters conditioning tank together with alkali oil waste water, and addition demulsifier is handled, so
Enter demulsification tank afterwards, through air bearing, the processing of paper bag filter type, subsequently into emulsion circulating box, at stainless steel ultrafiltration membrane
After reason, into alkali oil wastewater equalization pond.
Since the waste emulsified mixture of steel rolling mill's discharge contains a large amount of greasy filth (sludge containing amount is 15% in waste emulsified mixture), surpass
The limit value (minute quantity greasy filth is removed by paper tape filter in waste emulsified mixture) that the design of waste emulsified mixture system can be handled out, causes
Stainless steel ultrafiltration membrane system blocking at present is serious, and the cleaning frequency shortens, and scavenging period substantially extends.Cleaning is according to membrane flux every time
Need 48-72 hours or the longer time can be only achieved the membrane flux requirement of setting, and need a large amount of acid, alkali frequently replace into
Row cleaning, but operation duration is 8-24 hours or shorter after cleaning every time, is no longer satisfied the requirement of waste emulsified mixture treating capacity,
Seriously affect the operation of alkali oil waste water system and effluent quality.
Summary of the invention
In order to overcome above-mentioned deficiency, the present invention is intended to provide a kind of waste emulsified mixture treatment process, it can be without ceramic or stainless
Steel ultrafiltration membrane directly handles waste emulsified mixture, and treatment process facility is simple, and maintenance cost is lower, not to operations staff's competency profiling
Height, application prospect is considerable, is suitble to promote.
The present invention improves the effluent quality of emulsion system to improve the operational efficiency of emulsion system, it is ensured that alkali oil
The normal operation of waste water system increases reuse water, devises and be further added by precipitating, coagulation process after air-float technology, by early period
The untreated impurity component of air-float technology carries out precipitation process, and treatment effect is obviously improved.
The present invention provides a kind of waste emulsified mixture treatment process, including demulsification, air bearing, precipitating, coagulation process, specifically include
Following steps：
(1) each steel rolling mill's waste emulsified mixture water enters conditioning tank, and demulsifier is added and is demulsified, demulsifier is according to each steel rolling
Emulsion type difference is discharged by factory, using cation or the mixture of anionic surfactant and sulfuric acid, dosage control
In 5-10ppm, pH adjustment carries out emulsion circulating reflux 2 hours in 4.5-5.5, by conditioning tank circulating pump, by useless emulsification
28~32% greasy filth separation in liquid；
The percentage 28~32% is on the basis of the weight of greasy filth in former waste emulsified mixture, similarly hereinafter；
(2) enter flotation tank after being demulsified, air bearing water outlet enters sedimentation basin, NaOH liquid is added at flotation tank water inlet, adjusts
Whole emulsion pH is to neutrality, then according to emulsion type dose polymeric coagulant 20-100ppm, cation or anionic
Flocculant 2-5ppm carries out air-flotation process, after air bearing, handles using 15~25 minutes water-oil separating floatings, by 38
~42% oil emulsion is handled；
(3) after dosing is chemically treated, the sludge of sedimentation basin discharge enters alkali oil Waste water concentrating pond, sedimentation basin row through dredge pump
After water pressurization out, directly handled into alkali oil waste water system；The process be capable of handling reduce oil emulsion greasy filth 18~
22%.
In step (3), the water of sedimentation basin discharge, after pressurization, into paper bag filter, then through stainless steel ultrafiltration membrane treatment
Enter alkali oil waste water system afterwards.
Stainless steel ultrafiltration membrane pretreating process after improvement provided by the invention, technical staff pass through simulated experiment repeatedly,
Selection uses demulsifier, the flocculant of emulsion polarities match with production line, while adding aluminium polychloride (PAC) coagulant,
And in the range of pH value is 4.5-5.5, dosing experiment is carried out, by the detection to COD, oil content in water is produced, final determine increases
Add a 90m3Integrated sedimentation basin (see photo), and coagulation, flocculation agent-feeding treatment are set on sedimentation basin, coagulant uses PAC, adds
Dose control uses cationic polyacrylamide (PAM) in 20-100ppm, flocculant, and dosage is controlled in 2-5ppm, pH value control
System is within the scope of 8-10.
The present invention is that the processing of waste emulsified mixture opens a new process routes, and treatment process facility is simple, maintenance expense
With lower, operating cost is low, and not high to operations staff's competency profiling, application prospect is considerable, is suitble to promote.
Beneficial effects of the present invention：
(1) present invention is further added by coagulation, depositing technology after air-float technology, it is impossible to the impurity handled by air-float technology
Ingredient carries out precipitation process, and treatment effect is obviously improved；
(2) present invention is that the treatment process of waste emulsified mixture opens up a new way, and treatment process facility is simple, maintenance
Expense is lower, and application prospect is considerable, is suitble to promote.
Detailed description of the invention
Fig. 1 is processing unit figure of the invention.
In figure：1 is the tank that is demulsified, and 2 be air bearing complexes, and 3 be paper tape filter, and 4 be circulating box, and 5 be dissolving, and 6 are
Dissolved air water pump, 7 be emulsion ultrafiltration feed pump, and 8 be stainless steel ultrafiltration apparatus, and 9 be diluted alkaline conditioning tank, and 10 be waste oil collecting slot,
11 be sludge concentration tank；A is nitric acid, and B is waste emulsified mixture, and C is compressed air, and D is coagulant, and E is flocculant.
Specific embodiment
The present invention is further illustrated below by embodiment, but is not limited to following embodiment.
The present invention provides a kind of waste emulsified mixture treatment process, including demulsification, air bearing, precipitating, coagulation process, specifically include
Following steps：
(1) each steel rolling mill's waste emulsified mixture water enters conditioning tank, and demulsifier is added and is demulsified, demulsifier is according to each steel rolling
Emulsion type difference is discharged by factory, using cation or the mixture of anionic surfactant and sulfuric acid, dosage control
In 5-10ppm, pH adjustment carries out emulsion circulating reflux 2 hours in 4.5-5.5, by conditioning tank circulating pump, can will give up
25-30% greasy filth separation in emulsion.
Data statistics such as subordinate list 1 during the test.
(2) enter flotation tank after being demulsified, air bearing water outlet enters sedimentation basin, NaOH liquid is added at flotation tank water inlet, adjusts
Whole emulsion Ph is to neutrality, then according to emulsion type dose polymeric coagulant about 20-100ppm, cation or anion
Type flocculant 2-5ppm carries out air-flotation process, after air bearing, handles using about 20 minutes water-oil separating floatings, will about
The oil emulsion of 35-40% is handled, is reduced.
Data statistics such as subordinate list 2 during the test.
(3) after dosing is chemically treated, the sludge of sedimentation basin discharge enters alkali oil Waste water concentrating pond, sedimentation basin row through dredge pump
Water pressurization out enters paper bag filter, subsequently into alkali oil waste water system is entered after stainless steel ultrafiltration membrane treatment, can also pressurize
After be directly entered alkali oil waste water system and directly handled.The process, which is capable of handling, reduces oil emulsion greasy filth about 20-25%.
Data statistics such as subordinate list 3 during the test.
Stainless steel ultrafiltration membrane pretreating process after improvement provided by the invention, technical staff pass through simulated experiment repeatedly,
Selection uses demulsifier, the flocculant of emulsion polarities match with production line, while adding PAC coagulant, and pH value is 4.5-
In the range of 5.5, dosing experiment is carried out, by the detection to COD, oil content in water is produced, final determine increases a 90m3Collection
At precipitation concentration pond 11 (see attached drawing 1), and coagulation, flocculation agent-feeding treatment are set on sedimentation basin, coagulant uses PAC, dosage
In 20-100ppm, flocculant uses cationic PAM for control, and dosage control controls within the scope of 8-10 in 2-5ppm, pH value.
Improved technique is as shown in Figure 1.
By using the present invention, waste emulsified mixture treating capacity and treatment effect be obviously improved, it can be achieved that waste emulsified mixture it is continuous
Processing, stainless steel ultrafiltration membrane influent COD≤700mg/l, oil≤65mg/l, COD index are better than ultrafiltration membrane effluent quality, oil index
Close to ultrafiltration membrane effluent quality, when waste emulsified mixture come water it is larger when, the progress of diluted alkaline water system can be directly entered without ultrafiltration membrane
Processing.
Claims (5)
1. a kind of waste emulsified mixture treatment process, it is characterised in that：Including demulsification, air bearing, precipitating, coagulation process, specifically include with
Lower step：
（1）Each steel rolling mill's waste emulsified mixture water enters conditioning tank, and demulsifier is added and is demulsified, demulsifier is arranged according to each steel rolling mill
Emulsion type difference is put, using cation or the mixture of anionic surfactant and sulfuric acid, dosage is controlled in 5-
10ppm, pH adjustment carry out emulsion circulating reflux 2 hours in 4.5-5.5, by conditioning tank circulating pump, will be in waste emulsified mixture
28 ~ 32% greasy filth separation；
The percentage 28 ~ 32% is on the basis of the weight of greasy filth in former waste emulsified mixture；
（2）Enter flotation tank after demulsification, air bearing water outlet enters sedimentation basin, and NaOH liquid, adjustment cream are added at flotation tank water inlet
Change liquid pH to neutrality, then according to emulsion type dose polymeric coagulant, cation or anionic flocculant 2-5ppm,
Carry out air-flotation process, after air bearing, using 15 ~ 25 minutes water-oil separating floatings handle, by 38 ~ 42% oil emulsion into
Row processing；
（3）After dosing is chemically treated, the sludge of sedimentation basin discharge enters alkali oil Waste water concentrating pond through dredge pump, sedimentation basin discharge
After water pressurization, directly handled into alkali oil waste water system；The process, which is capable of handling, reduces oil emulsion greasy filth 18 ~ 22%.
2. waste emulsified mixture treatment process according to claim 1, it is characterised in that：Step（3）In, sedimentation basin discharge
Water after pressurization, into paper bag filter, then enters alkali oil waste water system after stainless steel ultrafiltration membrane treatment.
3. waste emulsified mixture treatment process according to claim 1, it is characterised in that：The coagulant is mixed for aluminium polychloride
Solidifying agent, dosage are controlled in 20-100ppm；By pH value control in the range of 4.5-5.5.
4. waste emulsified mixture treatment process according to claim 1, it is characterised in that：The flocculant is using cation poly- third
Acrylamide, dosage control control within the scope of 8-10 in 2-5ppm, pH value.
5. waste emulsified mixture treatment process according to claim 1, it is characterised in that：The sedimentation basin is 90m3Integrated sludge
Concentration basin, and coagulation, flocculation agent-feeding treatment are set on sedimentation basin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810904893.0A CN108911260A (en) | 2018-08-09 | 2018-08-09 | A kind of waste emulsified mixture treatment process |
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| CN201810904893.0A CN108911260A (en) | 2018-08-09 | 2018-08-09 | A kind of waste emulsified mixture treatment process |
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| CN201810904893.0A Pending CN108911260A (en) | 2018-08-09 | 2018-08-09 | A kind of waste emulsified mixture treatment process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109516611A (en) * | 2019-01-24 | 2019-03-26 | 洛阳森达乳化剂有限公司 | A kind of processing method of emulsion waste liquid |
| CN110240319A (en) * | 2019-06-20 | 2019-09-17 | 一汽-大众汽车有限公司 | Waste water pretreatment system and method in a kind of automobile manufacturing process |
| CN110526482A (en) * | 2019-08-20 | 2019-12-03 | 佛山市富龙环保科技有限公司 | A kind of waste emulsified mixture disposing technique and its operating method |
| CN110540340A (en) * | 2019-08-19 | 2019-12-06 | 佛山市富龙环保科技有限公司 | Waste oil water oxidation technology and operation method |
| CN110763807A (en) * | 2019-11-12 | 2020-02-07 | 山西太钢不锈钢股份有限公司 | Method for quickly separating water, soap and oil in emulsion and measuring oil concentration |
| CN112520925A (en) * | 2020-11-13 | 2021-03-19 | 辽宁忠旺集团有限公司 | Aluminum alloy waste emulsion treatment process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109516611A (en) * | 2019-01-24 | 2019-03-26 | 洛阳森达乳化剂有限公司 | A kind of processing method of emulsion waste liquid |
| CN110240319A (en) * | 2019-06-20 | 2019-09-17 | 一汽-大众汽车有限公司 | Waste water pretreatment system and method in a kind of automobile manufacturing process |
| CN110540340A (en) * | 2019-08-19 | 2019-12-06 | 佛山市富龙环保科技有限公司 | Waste oil water oxidation technology and operation method |
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| CN112520925A (en) * | 2020-11-13 | 2021-03-19 | 辽宁忠旺集团有限公司 | Aluminum alloy waste emulsion treatment process |
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