Method for treating waste emulsion

A waste emulsion, emulsified oil technology, applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc. The effect of reducing stress and increasing service life

Active Publication Date: 2015-05-27
BEIJING SINORICHEN ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult for the waste gas produced by the combustion method to meet the emission standards
Therefore, it is not appropriate to
(3) Chemical treatment and evaporation method: the treatment effect of this method is limited, and the one-time investment and operating costs are high
At that time, due to the large one-time investment, power shortage and high cost, the development was slow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 1. Pass the waste emulsion to be treated through a fine mesh filter to filter it, wherein the filtration accuracy of the fine mesh filter is 90 μm; after filtering through the fine mesh filter, the waste emulsion with a particle size greater than 90 μm Oil slicks are removed.

[0060] 2. The waste emulsion that has removed the floating oil is introduced into the grease trap through the water distribution pipe, so that the waste emulsion flows through the oil-water separation pipe from bottom to top; after passing through the oil-water separation pipe, the dispersed oil and water in the waste emulsion have different specific gravity , the dispersed oil floats to the water surface to form oil-water separation, and the dispersed oil floating to the water surface is collected by the oil coalescing pipe; wherein, the angle between the oil-water separation pipe and the horizontal plane is 60°.

[0061] 3. Introduce the waste emulsion treated by the grease trap into the electr...

Embodiment 2

[0070] 1. Let the waste emulsion to be treated pass through the fine mesh filter to filter it, wherein the filtration accuracy of the fine mesh filter is 100 μm; after filtering through the fine mesh filter, the waste emulsion with a particle size greater than 100 μm Oil slicks are removed.

[0071] 2. The waste emulsion that has removed the floating oil is introduced into the grease trap through the water distribution pipe, so that the waste emulsion flows through the oil-water separation pipe from bottom to top; after passing through the oil-water separation pipe, the dispersed oil and water in the waste emulsion have different specific gravity , the dispersed oil floats to the water surface to form oil-water separation, and the dispersed oil floating to the water surface is collected by the oil coalescing pipe; wherein, the angle between the oil-water separation pipe and the horizontal plane is 55°.

[0072] 3. Introduce the waste emulsion treated by the grease trap into th...

Embodiment 3

[0081] 1. Pass the waste emulsion to be treated through a fine mesh filter to filter it, wherein the filtration accuracy of the fine mesh filter is 80 μm; after filtering through the fine mesh filter, the waste emulsion with a particle size greater than 80 μm Oil slicks are removed.

[0082] 2. The waste emulsion that has removed the floating oil is introduced into the grease trap through the water distribution pipe, so that the waste emulsion flows through the oil-water separation pipe from bottom to top; after passing through the oil-water separation pipe, the dispersed oil and water in the waste emulsion have different specific gravity , the dispersed oil floats to the water surface to form oil-water separation, and the dispersed oil floating to the water surface is collected by the oil coalescing pipe; wherein, the angle between the oil-water separation pipe and the horizontal plane is 65°.

[0083] 3. Introduce the waste emulsion treated by the grease trap into the electr...

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Abstract

The invention provides a method for treating waste emulsion. The method comprises the following steps: performing oil slick removal treatment on the waste emulsion to be treated to remove oil slick therein; performing oil-water separation treatment on the waste emulsion without oil slick to remove disperse oil therein; performing electrochemical treatment on the waste emulsion after the oil-water separation treatment to obtain roughly treated waste emulsion in which the oil slick and disperse oil are removed and the emulsified oil and dissolved oil are flocculated; and performing static settlement and ultrafiltration treatment on the roughly treated waste emulsion to obtain clear water without oil slick, disperse oil, emulsified oil or dissolved oil, wherein the electrochemical treatment is performed by use of energized aluminum plate and a nano ceramic membrane, and the ultrafiltration treatment is performed by use of the power-off nano ceramic membrane. Through the treatment of the method provided by the invention, the water quality of the yielding water is good, and the yielding water can completely meet the limitation requirements on the discharge into a public sewage treatment system in the Integrated Discharge Standard of Water Pollutants DB11 / 307-2013 of Beijing.

Description

technical field [0001] The invention relates to an industrial wastewater treatment method, in particular to a method for treating waste emulsion coupled with nano-ceramic ultrafiltration and electrochemical oxidation, and belongs to the technical field of environmental protection. Background technique [0002] In the production process of machinery manufacturing and processing enterprises, a large amount of emulsion is used for lubrication and cooling in metal cutting. After a period of use, the emulsion will become waste water and be discharged. This kind of waste emulsion mainly contains organic oil and surfactant, which is prepared by diluting emulsified oil with water as needed and then adding emulsifier. At the same time, due to the dissolution of a large number of metal particles during the metal cutting process. Therefore, this kind of waste emulsion wastewater also contains a large amount of metal particle pollutants. [0003] Due to the high oil content of the was...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCC02F1/40C02F1/444C02F1/463C02F1/469C02F1/52C02F9/00
Inventor 吴盟盟庄洪雷童京华战欣欣倪丽琴赵慧敏李晓君
Owner BEIJING SINORICHEN ENVIRONMENTAL PROTECTION
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