Energy-saving and environment-friendly chemical sewage treatment system

Abstract

The invention discloses an energy-saving and environment-friendly chemical sewage treatment system, which comprises a seat plate, and a supporting plate is fixedly connected to the top surface of theseat plate. Through a filter device, under a constant water pressure, a filter element can move towards the water flowing direction along with the reduction of the permeability of a microporous filterscreen; the lower the permeability of the microporous filter screen is; the larger the moving distance of the filter element towards the water flow direction is; through a linkage device, the displacement change of the filter element can be reflected to a strain device; through cooperation among the linkage device, the strain device, an electric connection device, a track limiting device and a contact, the backwashing time point is determined, and backwashing is automatically carried out. The backwashing time point does not need to be manually set; the backwashing time point can be changed along with the change of the content of impurities in sewage, the high permeability of the microporous filter screen can be kept, the backwashing frequency can be greatly reduced, the sewage treatment efficiency is improved, and the practicability of the energy-saving and environment-friendly chemical sewage treatment system is improved.

Description

technical field [0001] The invention relates to the field of sewage treatment equipment, and more specifically relates to an energy-saving and environment-friendly chemical sewage treatment system. Background technique [0002] Chemical wastewater, also known as chemical wastewater, refers to the process wastewater, cooling water, exhaust gas washing water, equipment and site flushing water and other wastewater produced in the process of producing products in chemical plants, such as the production of ethylene, polyethylene, rubber, polyester, methanol, Oily waste water from ethylene glycol, oil tank farms, air separation and air compressor stations, etc. After being treated by the chemical sewage treatment system, these chemical sewage can generally meet the secondary discharge standard. Due to the shortage of water resources, it is necessary to meet the discharge standard The standard water is further treated in depth, and the water that meets the requirements of industria...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, in the process of using microporous filtration technology for advanced treatment of sewage, the micropores on the microporous filtration membrane are easily blocked by particles and fibers, which reduces the sewage treatment efficiency and requires high maintenance frequency. In order to solve this problem, people use PLC or time relay to control the work of microporous filtration equipment to achieve the purpose of automatic backwashing, so as to clean up the impurities on the microporous filtration membrane and maintain the permeability of the microporous filtration membrane, but PLC or The time relays are all set manually. If the set time is too short, the frequency of backwashing will increase, reducing the efficiency of sewage treatment. If the set time is too long, the permeability of the microporous filter membrane will be extremely low. It will also reduce the efficiency of sewage treatment, and the content of impurities in sewage is not constant. If the content of impurities is too high, the microporous filtration membrane will be blocked before the set backwashing time point. If the content of impurities is too low It will lead to too many times of backwashing and waste of time. The purpose of the present invention is to provide an energy-saving and environment-friendly chemical sewage treatment system, which can well solve the problems raised in the background technology

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