CN103387295A - Method for removing emulsified oil in degreasing waste liquid - Google Patents
Method for removing emulsified oil in degreasing waste liquid Download PDFInfo
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- CN103387295A CN103387295A CN2012101371071A CN201210137107A CN103387295A CN 103387295 A CN103387295 A CN 103387295A CN 2012101371071 A CN2012101371071 A CN 2012101371071A CN 201210137107 A CN201210137107 A CN 201210137107A CN 103387295 A CN103387295 A CN 103387295A
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Abstract
The invention provides an effective method for removing emulsified oil in a degreasing waste liquid. The method is as below: mixing 20-25% of sulfuric acid and the waste liquid waste liquid; controlling the addition of the sulfuric acid through pH value detection, so as to control the pH value within 1-2.5; dividing emulsified oil demulsified by sulfuric acid into hydrophobic waste oil and waste water; fully separating waste oil and blocks through aeration air floatation; separating the waste oil and waste water by a taper pool; collecting the waste oil in a waste oil collection pool; and sending the waste water into an integrated waste water treatment tank for post integrated treatment. The method employs simple equipment, and has advantages of small investment, low cost, obvious emulsified oil removal effect and clearance reaching 90-95%.
Description
(1) technical field
The present invention relates to a kind of method of removing oil in water emulsion in waste liquid, concrete a kind of degreasing wasting liquid is removed the method for oil in water emulsion.
(2) background technology
The automobile electrophoretic-coating wastewater mainly comes from the vehicle body pretreatment procedures such as pre-degreasing, degreasing, table accent, phosphatization, passivation, degreasing process generally cleans with thermokalite and organic solvent, alkali lye contains oil in water emulsion by suitable formulated institute effluents such as highly basic, weak base, polymerization basic salt, tensio-active agents, and the physico-chemical process treatment process is generally adopted in wastewater treatment in the past.But deoiling effect is not obvious, this is that in being scattered in water due to oil in water emulsion under the effect of tensio-active agent, the surface electrochemistry effect due to emulsion, be dispersed into oil droplet and be bordering on colloidal particle, particle is too little and with negative charge, therefore with a kind of metastable running balance system, exist.
(3) summary of the invention
Technical problem to be solved by this invention is to provide a kind of method that can effectively remove contained oil in water emulsion in degreasing wasting liquid.
Remove the method for oil in water emulsion in degreasing wasting liquid of the present invention, comprise the following steps:
8) will enter the degreasing wasting liquid groove after the degreasing wasting liquid collection, then by the degreasing wasting liquid pump, be promoted to reaction tank;
9) add the dilute sulphuric acid of 20-25% concentration in reaction tank, and with degreasing wasting liquid, mix, control the dosage of sulfuric acid by detecting pH value between 1-2.5,
10) oil in water emulsion after the sulfuric acid breakdown of emulsion forms hydrophobicity waste oil, enters aeration tank and utilizes air supporting fully to separate waste oil and oil-containing block.
11) degreasing wasting liquid after aeration air supporting enters in special thin neck conical tank standing 1 hour, makes degreasing wasting liquid be separated into upper strata waste oil and the oil-containing block swims in the degreasing wasting liquid top.
12) on the waste oil of the narrow neck part in thin neck Erlenmeyer flask,, with after opening valve oil having been emitted, collect waste oil and sell for the processing reuse of qualification department at place, 5cm left and right.
13) valve and liquidometer are also installed in the bottom at the lower body centrum position in thin neck Erlenmeyer flask, when being put into liquid level 5cm place, stop, and this moment, liquid was the fluid mixed solution, separated while again processing after next waste collection is complete.
14) waste water that deals may contain some insoluble waste oil, enters the comprehensive wastewater treating pond and process after the oleophobic property filtering material.Clear up once through the waste oil certain interval of time that oleophobic material isolates.
The present invention processes after separately degreasing wasting liquid being collected, and its equipment that uses is simple, less investment, and cost is low, and the oil in water emulsion removal effect is obvious, and clearance can reach 90-95%.
(4) description of drawings:
Fig. 1 is the schematic diagram of invention, wherein: the 1st, degreasing wasting liquid storage pool, the 2nd, reaction tank, the 3rd, dosing tank, the 4th, aeration tank, the 5th, conical tank, the 6th, salvage sump, the 7th, oil-liquid separator, the 8th, comprehensive wastewater treating pond, the 9th, pump, the 10th, pipeline, the 11st, stirrer, the 12nd, valve, the 71st, oleophobic property filtering material.
(5) embodiment:
The present invention is described in detail below in conjunction with accompanying drawing.
Embodiment 1:
The present invention does small-sized secret test at the zinc-plated shop production line waste water of the zinc-plated factory in huge port, Tianjin, the said firm is mainly to produce automobile component as main, the production line degreasing wasting liquid enters degreasing wasting liquid groove 1 after collecting, slowly be promoted to reaction tank 2 by pump 9, detect by the pH instrument, by by valve 12 by dosing tank 3 to the dilute sulphuric acid that adds 20% concentration in reaction tank, control the dosage of sulfuric acid, pH is controlled between 1～2.5 scope, be provided with stirrer 11 in reaction tank 2, waste water is mixed with medicine company.Oil in water emulsion after the sulfuric acid breakdown of emulsion forms hydrophobicity waste oil, enters aeration tank 4 and utilizes air supporting fully to separate waste oil and oil-containing block.Degreasing wasting liquid after 4 air supportings of aeration tank enters in special thin neck conical tank 5 standing 1 hour, makes degreasing wasting liquid be separated into upper strata waste oil and the oil-containing block swims in the degreasing wasting liquid top.On the waste oil of the narrow neck part in thin neck Erlenmeyer flask,, with after opening valve 12 oil having been emitted, collect waste oil and sell for the processing reuse of qualification department at place, 5cm left and right.
A valve 12 is also installed in the bottom at the lower body centrum position in thin neck Erlenmeyer flask, when being put into liquid level 5cm place, stops, and this moment, liquid was the fluid mixed solution, separated while again processing after next waste collection is complete.The oil content that contains the pettiness amount in the water of emitting, enter the oil-liquid separator 7 oleophobic property filtering materials 71 rear water of filtration and enter comprehensive wastewater treating pond 8, through the waste oil certain interval of time that oleophobic property filtering material 71 isolates, clears up once.
As above-mentioned, all power is provided by pump 9, and relevant device and pond body connect by pipeline 10.The present embodiment oil in water emulsion clearance can reach 90-95%.
Claims (1)
1. the method that can effectively remove contained oil in water emulsion in degreasing wasting liquid.It is characterized in that comprising the following steps:
1) will enter the degreasing wasting liquid groove after the degreasing wasting liquid collection, then by the degreasing wasting liquid pump, be promoted to reaction tank;
2) add the dilute sulphuric acid of 20-25% concentration in reaction tank, and with degreasing wasting liquid, mix, control the dosage of sulfuric acid by detecting pH value between 1-2.5;
3) oil in water emulsion after the sulfuric acid breakdown of emulsion forms hydrophobicity waste oil, enters aeration tank and utilizes air supporting fully to separate waste oil and oil-containing block;
4) degreasing wasting liquid after aeration air supporting enters in special thin neck conical tank standing 1 hour, makes degreasing wasting liquid be separated into upper strata waste oil and the oil-containing block swims in the degreasing wasting liquid top;
5) on the waste oil of the narrow neck part in thin neck Erlenmeyer flask,, with after opening valve oil having been emitted, collect waste oil and sell for the processing reuse of qualification department at place, 5cm left and right;
6) valve and liquidometer are also installed in the bottom at the lower body centrum position in thin neck Erlenmeyer flask, when being put into liquid level 5cm place, stop, and this moment, liquid was the fluid mixed solution, separated while again processing after next waste collection is complete;
7) waste water that deals may contain some insoluble waste oil, enters the comprehensive wastewater treating pond and process after the oleophobic property filtering material.Clear up once through the waste oil certain interval of time that oleophobic material isolates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101371071A CN103387295A (en) | 2012-05-07 | 2012-05-07 | Method for removing emulsified oil in degreasing waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101371071A CN103387295A (en) | 2012-05-07 | 2012-05-07 | Method for removing emulsified oil in degreasing waste liquid |
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| Publication Number | Publication Date |
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| CN103387295A true CN103387295A (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101371071A Pending CN103387295A (en) | 2012-05-07 | 2012-05-07 | Method for removing emulsified oil in degreasing waste liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115890A (en) * | 2018-10-31 | 2020-05-08 | 中冶华天工程技术有限公司 | Efficient demulsification method and treatment system for demulsification and dephosphorization of emulsified waste liquid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1533276A2 (en) * | 1998-09-11 | 2005-05-25 | Fuji Jukogyo Kabushiki Kaisha | A waste water clarification system |
| CN1752028A (en) * | 2005-08-05 | 2006-03-29 | 武汉湖工大膜技术开发有限公司 | Treatment method of edible regetable oil and fat processing waste water |
| CN101428877A (en) * | 2008-12-10 | 2009-05-13 | 周才华 | Method for removing roily oil from degreasing waste liquor in coating wastewater |
| CN101456650A (en) * | 2008-12-31 | 2009-06-17 | 大连力达环境工程有限公司 | Novel process for treating automobile industry coating wastewater by rocking bed |
| CN101456647A (en) * | 2008-12-19 | 2009-06-17 | 上海依科绿色工程有限公司 | Automobile manufacturer wastewater treatment method |
-
2012
- 2012-05-07 CN CN2012101371071A patent/CN103387295A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1533276A2 (en) * | 1998-09-11 | 2005-05-25 | Fuji Jukogyo Kabushiki Kaisha | A waste water clarification system |
| CN1752028A (en) * | 2005-08-05 | 2006-03-29 | 武汉湖工大膜技术开发有限公司 | Treatment method of edible regetable oil and fat processing waste water |
| CN101428877A (en) * | 2008-12-10 | 2009-05-13 | 周才华 | Method for removing roily oil from degreasing waste liquor in coating wastewater |
| CN101456647A (en) * | 2008-12-19 | 2009-06-17 | 上海依科绿色工程有限公司 | Automobile manufacturer wastewater treatment method |
| CN101456650A (en) * | 2008-12-31 | 2009-06-17 | 大连力达环境工程有限公司 | Novel process for treating automobile industry coating wastewater by rocking bed |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115890A (en) * | 2018-10-31 | 2020-05-08 | 中冶华天工程技术有限公司 | Efficient demulsification method and treatment system for demulsification and dephosphorization of emulsified waste liquid |
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Application publication date: 20131113 |