Zero-emission and low-energy-consumption concentration tower

Abstract

The invention discloses a zero-emission and low-energy-consumption concentration tower. The zero-emission and low-energy-consumption concentration tower can solve the problems of high desulfurizationwastewater operation cost, complex treatment process and real zero emission of desulfurization wastewater, which are not solved by a traditional wastewater treatment method for a concentration tower.The zero-emission and low-energy-consumption concentration tower comprises a tower body and a bottom pool, wherein a first spraying layer, a second spraying layer and a demisting layer are sequentially arranged in the tower body from bottom to top; a demister is mounted in the demisting layer; a connecting pipe is connected with and arranged on the side wall of the top part of the demisting layer;one end of the connecting pipe is connected with a gas circulating pump; a guide pipe and a gas circulating pipe which are perpendicular to each other are connected with and arranged on the side wallof the gas circulating pump; the bottom end of the gas circulating pipe is guided into the bottom pool; an electromagnetic valve is installed at the joint of the guide pipe and the gas circulating pipe; a plurality of spray heads are installed in the first spray layer and the second spray layer; a tower tray is installed at the bottom part of the interior of the tower body; and a PLC is installedon the outer wall of the tower body.

Description

technical field [0001] The invention relates to the field of zero-discharge treatment of desulfurization wastewater, in particular to a zero-discharge and low-energy consumption concentration tower. Background technique [0002] At present, the technical route of zero discharge of desulfurization wastewater in foreign countries is relatively complicated. The typical demonstration projects of the above-mentioned main technical routes are as follows: [0003] (1) Multi-effect evaporation crystallization process [0004] In the concentration tower, steam is used as the evaporation heat source, and the pretreatment softening + four-effect evaporation + crystallization process is adopted. After the desulfurization wastewater is treated, it is finally evaporated and crystallized to produce sodium chloride industrial salt; the operating cost is greatly affected by the water quality, and the average operating cost About 80 yuan / ton. [0005] (2) Mechanical vapor compression conc...

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Problems solved by technology

[0012] The purpose of the present invention is to provide a concentration tower with zero discharge and low energy consumption, which can solve the problems that the traditional method of concentration tower for wastewater treatment does not solve the problems of high operating cost of desulfurization wastewater, complicated treatment process and real realization of zero discharge of desulfurization wastewater

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