An integrated device and method for hydraulic cooperative flotation treatment of sewage

Abstract

The invention discloses an integrated device and method for treating sewage through cooperation between hydraulic action and flotation. The device consists of a hydraulic separation zone and a flotation zone. The hydraulic separation zone mainly comprises a tangential-inlet water inlet pipe, a swirl chamber, an overflow pipe, a swirl barrel, a sand collecting zone and a solid-rich phase outlet pipe from top to bottom; and large-grain solid matters are separated from water through hydraulic action. The flotation zone is located above the hydraulic separation zone and is mainly composed of, from bottom to top, a supporting tray, a releaser, a scum zone and the like, wherein the scum zone is provided with a deflector and an oil overflow weir and is used for collecting scum, and the periphery of the scum zone is an effluent weir for discharging purified water. The integrated device for treating sewage through cooperation between hydraulic action and flotation in the invention has the obvious effects of removing sand, lowering turbidity, separating solid and liquid and the like in the field of water treatment. The device is high in integration level, compact in structure, small in an occupied land area, high in the degree of automation, easy to operate, convenient to transport, fast in processing speed and low in energy consumption.

Description

technical field [0001] The invention relates to the field of solid, liquid and gas separation, and more particularly relates to an integrated device and method for hydraulic cooperative flotation treatment of sewage. Background technique [0002] During the process of migration, flow and collection of wastewater, it is inevitable to mix solid particles with relatively large proportions such as mud and sand, plus suspended particles already contained in the water, resulting in different proportions of solid particles contained in wastewater. In addition, wastewater often contains a certain degree of oily substances, so the early pretreatment stage is particularly important. First, the suspended particles and oily components in the water must be removed before subsequent treatment processes can be carried out. If the pretreatment effect is not good, it will not only affect the subsequent biochemical and advanced treatment, but also cause certain damage to pipelines, equipment,...

AI Technical Summary

Problems solved by technology

If the pretreatment effect is not good, it will not only affect the subsequent biochemical and advanced treatment, but also cause certain damage to pipelines, equipment, valves, fittings, etc.

[0003] At present, it is difficult for the large particle desanding devices commonly used in the market to deal with lighter suspended solids or oil droplets. Taken away with the water flow, although its sand removal efficiency is greatly improved, it still needs to use mechanical stirring and other facilities, so the energy consumption is also high

At the same time, for the removal of fine particles, the lighter suspended solids and oil stains in the wastewater are easily lifted to the liquid surface by the micro-bubbles and discharged from the height of the facility, but for the heavier suspended solids, it is difficult to be lifted to the liquid surface by the micro-bubbles. The liquid level, the water that separates it, mixed with heavier suspended matter

The existing solid-liquid separation technology in the water treatment industry cannot effectively remove suspended particles and oil components of different specific gravity in the water at the same time, and the pre-treatment effect of the water is poor

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