Emulsifying liquid wastewater membrane treatment process

An emulsion and membrane treatment technology, which is applied in neutralization water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Instability and other problems, to achieve the effect of reducing investment and operating costs, huge economic and social benefits, and simple and convenient operation

Inactive Publication Date: 2010-05-19
苏州凯新分离科技有限公司
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Problems solved by technology

The traditional treatment process generally adopts demulsification treatment, and the low-concentration emulsion can basically meet the requirements; however, for high-concentration emulsion, the traditional process needs to increase the dosage, but it is still difficult to meet the discharge requirements, and the treatment cost of this method Higher, lower recycling efficiency
With the increasing requirements of national environmental protection, membrane treatment is gradually accepted, but the existing membrane treatment process of emulsion wastewater generally adopts organic membrane, which has poor pollution resistance, low

Method used

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  • Emulsifying liquid wastewater membrane treatment process
  • Emulsifying liquid wastewater membrane treatment process

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Embodiment Construction

[0019] The present invention will be further described below through specific examples, but the present invention is not limited to these examples.

[0020] Such as figure 1 As shown, (1) pretreatment: the method is that the oil-containing emulsion wastewater enters the grease trap, and part of the oil in the grease trap pool will float on the liquid surface, and scrape it to one end of the grease trap with an oil scraper and slag scraper. The waste oil collection box is recycled, and the sludge at the bottom of the grease trap is regularly pumped to the sludge treatment system; the treated emulsion wastewater is sent to a centrifuge to remove solid particles, and the separation filter bag of the centrifuge is 500-4000 mesh. Then send it to the paper tape filter to further remove impurities; the emulsion wastewater after removing impurities enters the neutralization tank, and adjusts the pH to 4-13.

[0021] (2) Metal tubular membrane ultrafiltration: the pretreated emulsion...

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Abstract

The invention discloses an emulsifying liquid wastewater membrane treatment process. The process comprises the steps of pretreatment, metal tube type membrane ultrafiltration and organic membrane pretreatment. The process has the advantages that the problem that the current emulsifying liquid wastewater treatment has high cost, complex operation, low treatment efficiency and poor comprehensive recycling effect can be effectively solved so that the oil content of the treated emulsifying liquid wastewater is 10mg/l or less, the suspended substance (SS) content is 30mg/l or less and the chemical oxygen demand (CODcr) is 100mg/l or less, the problem that the emulsifying liquid wastewater is treated and discharged according to the related standard or is reused is fully solved; and the comprehensive utilization of the emulsifying oil is realized, the treatment process is efficiency and energy-saving, is easy to operate and use, the environmental pollution is reduced, the cost is low, and the process has great economic and social benefits.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to an emulsion wastewater membrane treatment process. Background technique [0002] The emulsified liquid is prepared by diluting the emulsified oil with water as needed and then adding an emulsifier. The emulsified liquid mainly contains mineral oil, vegetable oil, surfactant and various additives with complex components. In the metal material processing and machinery manufacturing industries, a large amount of emulsion is used for lubrication and cooling during metal cutting, rolling, drawing and other processes. After being recycled many times, the emulsion will become invalid and deteriorate into waste water discharge. At present, the high-concentration and heavily emulsified oily wastewater discharged in my country's metal material processing and machinery manufacturing industries has not been well treated. The main reason is that with the improvement of technology, the stabil...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/44C02F1/40C02F1/38C02F1/66
Inventor 屈峰许卫平
Owner 苏州凯新分离科技有限公司
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