Desulfurized wastewater zero-emission treatment system

Abstract

The invention discloses a desulfurized wastewater zero-emission treatment system. The desulfurized wastewater zero-emission treatment system comprises a base, wherein two first supporting frames are fixedly arranged on the upper end of the base; supporting plates are fixedly arranged on opposite side walls in the two first supporting frames; a second precipitating tank and a first precipitating tank are respectively and fixedly arranged on the upper ends of the two supporting plates; filter plates are fixedly arranged on opposite side walls in the second precipitating tank and the first precipitating tank, one filter plate is used for dividing the first precipitating tank into a first precipitating zone and a first filter zone, and the other filter plate is used for dividing the second precipitating tank into a second precipitating zone and a second filter zone; a third liquid inlet hole is formed in the side wall of one end in the first precipitating zone. According to the desulfurized wastewater zero-emission treatment system disclosed by the invention, scaling is not easy to generate during reaction while a chemical agent is fully mixed with wastewater, and the treatment time onthe wastewater is shortened; by carrying out distillation treatment on the treated wastewater by utilizing waste heat of thermal power generation, the purpose of zero emission of desulfurized wastewater can be achieved, pollution to the environment and waste of water resource are reduced, and the use is convenient.

Description

technical field [0001] The invention relates to the technical field of desulfurization wastewater treatment, in particular to a zero-discharge treatment system for desulfurization wastewater. Background technique [0002] In the wet flue gas desulfurization process of coal-fired power stations, in order to maintain the balance of the slurry circulation system of the desulfurization device, it is necessary to regularly discharge wastewater from the absorption tower, that is, desulfurization wastewater. Compared with the general industrial wastewater of coal-fired power stations, its water quality is quite special. Many of the substances are the first type of pollutants that are strictly controlled in the national environmental protection standards, mainly in the following aspects: (1) The wastewater is weakly acidic, PH is 4-6; (2) The content of suspended solids is high, the particles are small, and the main component is gypsum, followed by fly ash from flue gas, calcium car...

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Problems solved by technology

The wastewater treated by this method still contains high-concentration salts such as Ca2+, Mg2+, Cl-, SO42-, etc. dissolved in the wastewater. If it is directly discharged for a long time, it will have a serious impact on the surrounding water body, and the chemical agent cannot be fully mixed with the wastewater. Fusion, reaction and precipitation are easy to scale in the same container, and chemical reagents need to be added manually, and the treatment efficiency is slow. Therefore, we have designed a zero-discharge treatment system for desulfurization wastewater to solve the above problems

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