Pretreatment system for high-suspended-matter, high-oil and high-COD wastewater
A high-suspension and pretreatment technology, which is applied in the fields of special compound water treatment, flotation water/sewage treatment, water/sewage treatment, etc., can solve the problems such as the inability to meet the water requirements of the membrane treatment process
Pending Publication Date: 2021-12-14
NANJING GUONENG ENVIRONMENTAL PROTECTION ENG
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Problems solved by technology
[0004] The purpose of the present invention is to provide a high-suspended solids, high-oil, high-COD wastewater pretreatment system to solve the technical problem that the pretreatment stage cannot meet the water inlet requirements of the subsequent membrane treatment process
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[0028] In order to better understand the purpose, structure and function of the present invention, a high-suspended solids, high-oil, high-COD wastewater pretreatment system of the present invention will be further described in detail in conjunction with the accompanying drawings.
[0029] Such as figure 1 As shown, the present invention includes an air flotation tank 10 , a sedimentation tank 20 , and a glass sand filter 30 , and the air flotation tank 10 communicates with the glass sand filter 30 through the sedimentation tank 20 .
[0030] The air flotation tank 10 includes a mixer 11 , a dissolved air releasing system 12 , a scum scraping system 13 , and a scum collecting system 14 . When the waste water enters the air flotation tank, it is first stirred with the mixer 11, and the water is pressurized and aerated through the dissolved air release system 12 to increase the amount of air dissolved in the water. It is released under normal pressure, and the air is separated t...
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Abstract
The invention discloses a pretreatment system for pretreatment system for high-suspended-matter, high-oil and high-COD wastewater. The pretreatment system comprises an air floatation tank, a sedimentation tank and a glass sand filter, wherein the air floatation tank is provided with a stirrer, a dissolved air release system, a slag scraping system and a scum collecting system; the sedimentation tank is provided with a stirrer, an inclined pipe, a sludge scraper, a water collecting tank and a forced sludge circulating system; and the glass sand filter is provided with aluminosilicate sand filler, a water inlet device and a water outlet device. According to the invention, the anti-fluctuation characteristic of an air floatation-efficient precipitation-glass sand filter combined process is fully utilized and applied to a high-salinity wastewater pretreatment section, so the stability of safe operation of the whole wastewater treatment process is guaranteed, especially the stability of operation of a reverse osmosis membrane in a rear section is guaranteed, the risk of the whole project is reduced, the combined process is short in process flow, an occupied area is small, and the whole process is automatically controlled.
Description
technical field [0001] The invention belongs to the field of wastewater treatment, in particular to a pretreatment system for wastewater with high suspended matter, high oil and high COD. Background technique [0002] With the rapid development of social economy, water pollution is becoming more and more serious, which has been highly concerned by the society. Wastewater discharge has caused immeasurable harm to the ecological environment. Eliminating the discharge of industrial pollution sources, reducing the amount of pollutants entering the water environment, and reducing the degree and scope of pollution caused by them are the focus of pollutant control in the water environment. The research and development of efficient and economical new technologies for wastewater treatment has become a hot topic for environmental protection workers all over the world. Industrial wastewater contains a large amount of organic pollutants, suspended solids, oils, soluble salts and other ...
Claims
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IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/20C02F1/24C02F1/40C02F1/001C02F2001/007C02F1/28C02F1/52C02F1/725C02F2201/002C02F2301/046C02F2303/16C02F2303/24C02F2305/023C02F2303/14
Inventor 朱雪梅王静史宇涛高占平朱嘉祥陶正兴
Owner NANJING GUONENG ENVIRONMENTAL PROTECTION ENG