Full-automatic constant water level sequential batch water-draining system and water-draining method thereof

Abstract

The invention discloses a full-automatic constant water level sequential batch water-draining system. Sewage is continuously pumped into sequential batch reaction tanks; in water draining, inflation of air weir, aeration and precipitation are successively performed in a first sequential batch reaction tank, inflation of air weir, aeration reaction, precipitation and water draining are successivelyperformed in a second sequential batch reaction tank; the two sets of sequential batch reaction tanks are successively switched for alternatively running; an air control type constant water level sequential batch system comprises a water feeding tank, a water feeding pump, sequential batch reaction tanks, a first air weir, a second air weir, a first air compressor, a second air compressor, a first aerator, a second aerator and a water draining tank; the first air weir and the second air weir are both connected with the first air compressor; the first aerator and the second aerator are both connected with the second air compressor. The full-automatic constant water level sequential batch water-draining system has high degree of automation; constant water level is kept in the whole sequential batch reaction tank and water is continuously drained; flow of drained water is stable; air is difficult to be carried by the drained water; quality of the drained water is high.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a fully automatic constant water level sequence batch operation water discharge system and a drainage method thereof. Background technique [0002] With the widespread application of sequencing batch technology (sequencing batch activated sludge process), the traditional lifting decanter can no longer meet the requirements of intermittent water discharge according to the operation cycle. The air outlet weir (referred to as "air weir") is to control the water outlet cycle through the water level electrode to control the switch of the air inlet and outlet valves to meet the needs of process operation. Exhaust problem. Therefore, various continuous flow constant water level air weirs appear in large numbers, but in the actual operation process, there are some problems with the air weirs: [0003] 1) The water out of the air weir is easy to entrain and take away part of th...

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Problems solved by technology

[0003] 1) The water out of the air weir is easy to entrain and take away part of the air, so that negative pressure is formed in the air weir, resulting in a siphon phenomenon, the water flow rate will increase sharply, and the water body will be disturbed, the water will easily run out of mud, and the water quality will decline

[0004] 2) During the operation of the air weir, it needs to switch between multiple valves continuously, and the water level electrode is often not well maintained due to long-term operation, and it is easy to be damaged, causing the electrode to easily send out wrong signals, making it impossible to Quickly and accurately complete the switching operation between different reaction period functions of the sequencing batch reaction pool

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