Real-time automatically back-flushing control system of denitrification filter pool and running method

Abstract

The invention relates to a real-time automatically back-flushing control system of a denitrification filter pool and a running method. The system comprises an online water turbidity sensor, a nitrate sensor, a turbidity tester and a nitrate tester, and further comprises a process controller and an industrial personal computer. The online water turbidity sensor, the nitrate sensor, the turbidity tester and the nitrate tester are arranged in the denitrification filter pool. The process controller is provided with a plurality of relays of a water feeding pump relay, an intake valve relay and the like, and the relays are sequentially and respectively connected with corresponding pumps and valves in a control manner. A clean water tank is further provided with a water discharging pipe and a mud storage tank, the water discharging pipe is communicated with the upper part of a filter material layer of the denitrification filter pool, and the mud storage tank is communicated with the upper part of the denitrification filter pool. The running method of the back-flushing control system comprises the following steps of: 1, control system starting; 2, parameter treatment judgment; 3, drainage process; 4, single gas back-flushing; 5, gas-water combined back-flushing; and 6, single water back-flushing. The invention is suitable for the urban sewage advanced treatment and the nitrogenous industrial wastewater treatment, and has the advantages of perfected structure, convenience of operation, high efficiency and good effect.

Description

Technical field [0001] The invention relates to a biological treatment technology for sewage regeneration and reuse, in particular to a control system and an operating method for real-time automatic backwashing of anoxic denitrification filter capable of deep denitrification sewage treatment, and is suitable for advanced urban sewage treatment and containing Nitrogen industrial wastewater treatment. Background technique [0002] In recent years, the rapid increase of China's economic aggregate has reduced the total amount of water resources. The increasingly serious pollution of the water environment has further aggravated the tension of water resources. The problem of water resources has become a bottleneck for the sustainable development of China's economy and society. Sewage reuse has great potential to solve the shortage of urban water resources. After proper regeneration treatment, sewage can be reused for various purposes such as river and lake landscape, industrial coolin...

AI Technical Summary

Problems solved by technology

The main technical problems that need to be solved at present are: ①The traditional biofilter technology is easy to block and it is difficult to accurately judge when the filter needs to be backwashed; ②How to flexibly and accurately control the intensity of the filter backwashing process to avoid backwashing If the strength is too high, the recovery time after backwashing of the filter is too long, and if the strength is too low, it is difficult to completely remove the overgrown biofilm from the filter system, and local blockage of the filter occurs; ③How to flexibly and accurately control the backwashing of the filter process time, to avoid excessive backwashing water used by the filter and increase energy consumption; ④ it is difficult to ensure that the denitrification and filtration functions can be restored in the shortest time after backwashing of the filter to ensure stable TN and Suspended solids up to standard effluent water quality

These have brought practical difficulties to the denitrification biological filter tank sewage treatment process to obtain good reclaimed water quality, thus hindering the further improvement of the operation effect of the process and the popularization and application of the process

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