System capable of improving recycled waste emulsion ultrafiltration efficiency by use of pH regulation

A waste emulsion and emulsion technology, which is applied in water/sewage treatment, osmotic/dialysis water/sewage treatment, neutralization water/sewage treatment, etc., can solve the problems of complicated device method and complicated system structure, etc., so as to improve the service life , reduce pollution, improve the effect of

Inactive Publication Date: 2015-05-13
SHANGHAI DAZHONG XIANGYUAN POWER SUPPLY
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Problems solved by technology

However, the device method is relatively complicated, resulting in a cumbersome system structure

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  • System capable of improving recycled waste emulsion ultrafiltration efficiency by use of pH regulation

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[0022] A system that uses pH adjustment to improve the ultrafiltration efficiency of recycled waste emulsion, its structure is as follows figure 1 As shown, it includes: a waste emulsion storage tank 6, an ultrafiltration membrane element 1 connected to the waste emulsion storage tank 6 through a pipeline 4, and a pH value adjustment device 7 connected to the waste emulsion storage tank 6 to adjust the waste emulsion The pH of the solution in the solution is slightly alkaline. The pH value of the solution can be adjusted to 9-10, and optimally, the pH value of the solution in the waste emulsion is adjusted to 9.6.

[0023] The pH value adjustment device 7 feeds sodium hydroxide solution or dilute sulfuric acid into the waste emulsion storage tank 6, and feeds different solutions according to the different pH values ​​of the waste emulsion. In addition, the waste emulsion storage tank 6 has a built-in pH value tester for detecting the real-time pH value. The pH value tester i...

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Abstract

The invention relates to a system capable of improving recycled waste emulsion ultrafiltration efficiency by use of pH regulation. The system comprises a waste emulsion holding tank, an ultrafiltration membrane component connected with the waste emulsion holding tank by use of a pipeline, and also a pH value regulating device connected with the waste emulsion holding tank; the pH value regulating device is used for regulating the pH value of a solution in the waste emulsion so that the solution can be weakly alkaline. Compared with the prior art, the system is characterized in that NaOH or dilute sulfuric acid is added to the waste emulsion to regulate the pH to the range of 9-10 so that the waste liquid can be weakly alkaline, next, the waste liquid is fed into the ultrafiltration membrane component by use of a high-pressure pump for ultrafiltration, and then clean water is discharged, while the high-concentration waste liquid is discharged from the other side; as a result, the ultrafiltration effect is greatly improved, and more importantly, the pollution on the membrane due to impurities in the filtration process is reduced, and moreover, the frequency of back washing is reduced and the service life of the membrane is prolonged.

Description

technical field [0001] The invention relates to a system for treating waste emulsion, in particular to a system for improving the ultrafiltration efficiency of recovered waste emulsion by adjusting pH. Background technique [0002] The key to treating waste emulsion is demulsification and oil removal. There are mainly several methods for demulsification and oil removal: coagulation method, salting out method, mixing method, ultrafiltration method and chemical flocculation and flotation method. Among them, the effect of ultrafiltration is relatively good. Ultrafiltration is actually a process of sieve separation. After a certain pressure is applied to water, high molecular substances and colloidal substances are prevented from passing by the membrane, while water and low molecular substances can be separated. Purified by filtration. During the filtration process, the ultrafiltration membrane will be polluted by the filtered impurities. The general treatment method is to back...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66C02F1/44
CPCC02F1/66C02F1/444
Inventor 杨存华苏胜锋
Owner SHANGHAI DAZHONG XIANGYUAN POWER SUPPLY
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