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Treatment method and device of waste emulsion water

A treatment method and technology of a treatment device, applied in the field of water treatment, can solve problems such as low filtration flux, and achieve the effect of improving filtration flux

Inactive Publication Date: 2017-12-15
湛江市绿城环保再生资源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of low filtration flux caused by severe membrane pollution in the process of treating emulsion wastewater by ceramic membranes. The present invention mainly uses filter aids to form Dynamic protective layer filter cake to avoid excessive oil droplets entering the membrane pores

Method used

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  • Treatment method and device of waste emulsion water
  • Treatment method and device of waste emulsion water
  • Treatment method and device of waste emulsion water

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Effect test

Embodiment 1

[0089] The first step is to carry out inclined plate oil separation treatment on the emulsion wastewater to remove the slick oil;

[0090] In the second step, the waste water obtained in the first step is flocculated. The addition of the flocculant is 0.1wt% of the waste water weight. The flocculant is composed of polyaluminum calcium chloride, ferric chloride, polyacrylamide, citric acid, polymer Ferric chloride and bentonite are mixed, and the weight ratio is 1:0.8:1:0.1:0.1:1;

[0091] In the third step, the wastewater obtained in the second step is subjected to inclined plate sedimentation treatment to remove sediment;

[0092] In the 4th step, the waste water obtained in the 3rd step is filtered by a quartz sand filter to remove impurities of large particles;

[0093] In the 5th step, the waste water obtained in the 4th step is filtered by a tubular ceramic membrane filter, and the structure of the ceramic membrane filter is as follows Figure 5-7 As shown, the average ...

Embodiment 2

[0097] The first step is to carry out inclined plate oil separation treatment on the emulsion wastewater to remove the slick oil;

[0098] In the second step, the wastewater obtained in the first step is flocculated. The amount of flocculant added is 0.1 to 0.5 wt% of the wastewater weight. , Polymerized ferric chloride, bentonite mixed, the weight ratio is 1: 0.9: 2: 2: 0.4: 4;

[0099] In the third step, the wastewater obtained in the second step is subjected to inclined plate sedimentation treatment to remove sediment;

[0100] In the 4th step, the waste water obtained in the 3rd step is filtered by a quartz sand filter to remove impurities of large particles;

[0101] In the 5th step, the waste water obtained in the 4th step is filtered by a tubular ceramic membrane filter, and the structure of the ceramic membrane filter is as follows Figure 5-7 As shown, the average pore size range of the tubular ceramic membrane filter is 500μm, the membrane surface flow velocity dur...

Embodiment 3

[0105] The first step is to carry out inclined plate oil separation treatment on the emulsion wastewater to remove the slick oil;

[0106] In the second step, the wastewater obtained in the first step is flocculated. The amount of flocculant added is 0.1 to 0.5 wt% of the wastewater weight. , Polymerized ferric chloride, bentonite mixed, the weight ratio is 1:0.85:1.5:0.5:0.2:2;

[0107] In the third step, the wastewater obtained in the second step is subjected to inclined plate sedimentation treatment to remove sediment;

[0108] In the 4th step, the waste water obtained in the 3rd step is filtered by a quartz sand filter to remove impurities of large particles;

[0109] In the 5th step, the waste water obtained in the 4th step is filtered by a tubular ceramic membrane filter, and the structure of the ceramic membrane filter is as follows Figure 5-7 As shown, the average pore size range of the tubular ceramic membrane filter is 200 μm, the membrane surface flow rate during...

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Abstract

The invention relates to a treatment method and device of waste emulsion water, and belongs to the technical field of water treatment. The main process includes the steps of oil isolation on wobble plates, flocculation treatment, sediment through the wobble plates, coarse filtration, ceramic membrane filtration, biochemical treatment (anaerobic treatment, first-level aerobiotic treatment, oxygen deficit treatment, second-level aerobiotic treatment and MBR filtration), and acquirement of water produced after treatment. The treatment method of the waste emulsion water can effectively remove oil contaminants and particulate matter in the waste water, when a ceramic membrane is adopted for filtration, fine oil drops in emulsions can be removed, and meanwhile, a contamination process of the ceramic membrane is avoided by adopting a filter aid, so that filtration flux is increased; by adopting a ceramic membrane anti-blocking structure, the problem that particulate matter in the filter aid blocks a ceramic membrane pipe is solved.

Description

technical field [0001] The invention relates to a treatment method and device for emulsion wastewater, belonging to the technical field of water treatment. Background technique [0002] Oily emulsified wastewater is a kind of wastewater that is difficult to treat, and it exists in large quantities in large iron and steel enterprises and mechanical processing industries. Although in the past ten years, the processing technology has been improved accordingly, but as the requirements for rolled plates in various industries are getting higher and higher, all large iron and steel enterprises are focusing on steel surface coating technology and steel surface cleaning technology. A lot of technical improvements have been made, especially in order to ensure the stable quality of high value-added products in the rolling process, the molecular weight of the emulsified oil in the emulsion used is getting smaller and smaller, and the composition of the emulsifier is becoming more and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F1/40C02F1/44C02F1/5245C02F1/5263C02F1/54C02F1/56C02F3/02C02F3/28C02F9/00C02F2301/08
Inventor 毛强平
Owner 湛江市绿城环保再生资源有限公司
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