Pressure swing type electro-adsorption softening concentration technology

Abstract

The invention relates to the technical field of pressure swing type electro-adsorption, and discloses a pressure swing type electro-adsorption softening concentration technology. The raw water tank is connected with the manganese sand filter; a water inlet pump A is arranged between the raw water tank and the manganese sand filter; the manganese sand filter is connected with a middle water tank which is provided with a water inlet pump B; The middle water tank is connected with the variable-pressure electric adsorption device through a water inlet pump B; and the middle water tank is provided with a washing water pump and is connected with the manganese sand filter through the washing water pump. When wastewater, especially high-salinity and high-hardness wastewater such as desulfurization wastewater, is treated by a variable-pressure electro-adsorption technology, scales such as calcium and magnesium can be deposited on the cathode, whereas the anode can generate oxidizing substances to destroy colloids in water to enable the colloids to be unstable and to be flocculated and precipitated with incrustation, and the colloids and the incrustation are discharged through the incrustation flushing system, so that the device has a relatively good softening and descaling effect, does not need chemical softening, solves the problem that chemical softening pretreatment needs to be carried out when high-hardness wastewater is treated by traditional electro-adsorption, and therefore, greatly reduces the operating cost of electro-adsorption.

Description

technical field [0001] The invention relates to the technical field of variable pressure electric adsorption, in particular to a softening and concentrating technology of variable pressure electric adsorption. Background technique [0002] With the promulgation of various national environmental protection policies and the strict implementation of the sewage discharge permit system, the high-hardness and high-salt wastewater of most industrial enterprises, such as desulfurization wastewater from thermal power plants, must be treated with zero discharge solidification. Due to the high energy consumption per ton of water for solidification treatment, a concentration reduction treatment system is usually set up. [0003] At present, the softening, concentration and weight reduction treatment technologies for high-hardness and high-salt wastewater such as desulfurization wastewater mainly include membrane method and thermal method. Among them, membrane concentration includes hig...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a pressure-swinging electro-adsorption softening and concentration technology, which can be discharged through the scale flushing system, has a good softening and descaling effect, and does not need to be softened by adding medicine, which solves the problem of traditional electro-adsorption treatment. The problem that hard wastewater needs to be softened and pretreated by dosing, greatly reduces the operating cost of electro-adsorption and other advantages, and solves the problems of easy scaling and clogging, difficult equipment cleaning (calcium sulfate, magnesium silicate scale, etc.), low heat transfer efficiency, Equipment occupies a large area, etc.

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