Method for treating high-concentration sewage generated in waste oil regeneration process

A technology for the regeneration and treatment of waste oil, which is used in water/sewage treatment, heating water/sewage treatment, degassed water/sewage treatment, etc. It can solve the problems of increasing the amount of sewage in the park and the difficulty of treatment, and the inability to effectively treat sewage. , to reduce the CoD value and increase the Bod5/Cod effect

Pending Publication Date: 2021-06-18
湖北大江润业再生资源有限公司
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Problems solved by technology

[0003] More than 90% of recycled oil companies are unable to effectively treat the sewage due to lack of awareness of this kind of sewage and lack of research and development capabilities.

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  • Method for treating high-concentration sewage generated in waste oil regeneration process

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Example Embodiment

[0015] The present invention proposes a new high-concentration sewage treatment method, first introducing a COD above 200,000, BOD5 / COD <0.3. High concentration sewage is introduced into the evaporated vapor casing, and the steam flow rate is increased by heating, such as nitrogen, and cools the return flow rate. After sufficient stripping IH, aqueous phase was pumped into the bottom of the MVR evaporator, water was evaporated to dryness after oil collected, concentrated sewage collection tank to a low concentration vapor After cooling, the detection CoD less than 10000, B / C is greater than 0.6, the aqueous phase Low concentration sewage cans are pumped to the factory supporting conventional sewage treatment plant.

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Abstract

The invention provides a method for treating high-concentration sewage generated in a traditional waste oil regeneration process. According to the method, steam stripping evaporation and MVR (mechanical vapor recompression) low-energy-consumption evaporation drying are conducted on the high-concentration sewage generated in a regenerated oil distillation link with extremely high CoD (more than 200,000) and extremely low Bod5/Codgt (lower than 0.3), oil materials in the sewage are collected, the CoD of the sewage is greatly reduced to 10,000 or below, and the Bod5/Cod is greater than 0.6. The wastewater is converted into common wastewater which is easy to treat, the wastewater is treated by a conventional wastewater treatment system, and the wastewater is discharged after reaching the standard.

Description

Technical field [0001] The present invention belongs to the field of petrochemical technology, and is related to the harmless treatment of high-concentration sewage produced by waste oil regeneration. Background technique [0002] All factories in the current waste oil regeneration are unable to dehydrate the raw material oil, and the distillation process. The link produces high-concentration sewage of COD high (20-40w) BOD5 / COD <0.3 difficult to digest and odor severe (sulfur-containing compound such as thiol, sulfide). [0003] More than 90% of the regenerated oil enterprises cannot effectively handle the sewage due to the deficiencitation of the sewage, and the sewage cannot be effectively treated. It can only be diluted with a huge amount of water, and the sewage treatment amount and treatment of the park will increase. Difficulty. Inventive content [0004] The technical solution of the present invention is: since the high-concentration sewage contains a large amount o...

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Application Information

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IPC IPC(8): C02F1/04C02F1/20C02F1/40C02F101/30
CPCC02F1/048C02F1/20C02F1/40C02F2101/30
Inventor 王洪雷郭钢福
Owner 湖北大江润业再生资源有限公司
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