A defoaming system and method suitable for wastewater treatment

Abstract

The invention relates to a defoaming system and method for coking wastewater treatment. The system comprises a dosing device, a water distribution pipeline and a plurality of defoaming devices, wherein the defoaming devices are installed on the water distribution pipeline at intervals; the dosing device comprises a defoaming agent storage tank, a clean water tank and a tubular mixer; the tubular mixer is provided with a defoaming agent pipeline connected with the defoaming agent storage tank, a clean water pipeline connected with the clean water tank, and a liquor delivery pipeline connected with the water distribution pipeline; each defoaming device is provided with a defoaming pipe; the lower end of each defoaming pipe is connected to the water distribution pipeline; and the upper end of each defoaming tube is provided with a sprayer. Three water streams are sufficiently mixed in the tubular mixer to form a defoaming agent mixed solution flowing at high speed; the clean water tank adopts the clean water after reaching the standard by wastewater treatment, thereby saving the water resources and implementing efficient utilization of wastewater; and the system can not pollute the environment, and implements continuous defoaming on the foam generation unit.

Description

technical field [0001] The invention relates to waste water treatment equipment, in particular to a defoaming system and method suitable for waste water treatment. Background technique [0002] The activated sludge process is the most widely used biological treatment method in sewage treatment plants, and the problem of surface foam is common. Foam is generally viscous, which will cause a large amount of solids to fall into the floating foam layer and cause overturning, reducing the oxygenation efficiency of the aeration tank; in the pure oxygen sealed activated sludge system, the foam will enter the oxygen compressor and cause a fire; In the sedimentation tank, the suspended solids in the effluent will increase under the baffle of the sedimentation tank, causing the deterioration of the effluent water quality; the accumulation of foam can also cause corruption, and it will freeze in cold areas, affecting normal operation; the remaining sludge containing foam is anaerobicall...

AI Technical Summary

Problems solved by technology

[0004] In the existing physical and chemical defoaming methods, water is usually sprayed above the foam structure for defoaming, and the defoaming water is sprayed directly into the pool through straight pipe nozzles. The spraying area of ​​each nozzle is small, so it is necessary to arrange Only a large number of nozzles can achieve the purpose of defoaming, wasting a lot of clean water, and at the same time increasing the load of water treatment, and the energy loss is relatively large; if a shower type nozzle is used, it will increase the cost of the equipment, and it is easy to block, which not only reduces the consumption Bubble efficiency, but also increase the consumption of equipment

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