Integrated electrocatalysis wastewater hardness removal and zero discharge process

Abstract

The invention discloses an integrated electrocatalysis wastewater hardness removal and zero discharge process which comprises the steps of introducing inlet water from a homogenizing tank, feeding the inlet water into a pretreatment device by a raw water pump, feeding pretreated produced water into an adsorption device, and recycling the produced water for a gasification system through a reflux booster pump for recycling; after the adsorption of an adsorber of the adsorption device is saturated, feeding a composite desorption agent in a desorption liquid tank into an adsorption tank through a desorption displacement pump to be desorbed; feeding effluent of a desorption waste liquid tank into an efficient electro-catalytic reactor through a waste liquid pump, separating out high-concentration ions through an electro-catalytic reaction to generate precipitates, feeding supernate in the electro-catalytic reactor into an integrated membrane stack through a high-pressure pump, and after the supernate is treated by the integrated membrane stack, enabling concentrated water to flow back to the desorption liquid tank and be recycled as a desorption agent, and recycling pure water to a clear water tank. Compared with the traditional technology, the process has the characteristics of no dosing, no PH value adjustment, no cooling and the like, provides a subtraction design concept, has certain innovativeness, and can effectively solve the problem of hardness removal in the raw wastewater.

Description

technical field [0001] The invention relates to the technical field of industrial water treatment, in particular to an integrated electrocatalytic waste water hard removal and zero discharge process. Background technique [0002] Under the condition of increasingly stringent environmental protection policy requirements, water saving, emission reduction, energy saving and consumption reduction, and carbon emission reduction are one of the primary tasks of industrial water treatment. Compared with traditional technology, high-hardness wastewater treatment is a problem that plagues the water treatment industry. [0003] At present, there are many treatment methods for high-concentration wastewater, such as membrane separation, evaporative crystallization, chemical precipitation, adsorption, ion exchange, oxidation, and extraction. The technology generally uses the dosing method and the ion exchange method for treatment, but the dosing method has problems such as large dosing vo...

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Problems solved by technology

[0003] At present, there are many treatment methods for high-concentration wastewater, such as membrane separation, evaporative crystallization, chemical precipitation, adsorption, ion exchange, oxidation, and extraction. The technology generally uses the dosing method and the ion exchange method for treatment, but the dosing method has problems such as large dosing volume, pH adjustment, high operating cost, unstable operation, substandard water quality, and large amount of waste residue; the ion exchange method has a large number of problems. High-salt and high-hard waste liquid is produced, and finally needs to be treated by chemical means

[0004] In the prior art, the title is a space furnace gasification ash water hardening device, the invention patent with the publication number CN209383527U and the invention patent with the title of a coal gasification furnace wastewater treatment and resource utilization device, the publication number is CN209307148U can Solve the hardness problem in water, but when treating wastewater, a large amount of waste liquid is produced, which needs to be treated by chemical dosing method, which has high operating costs, large dosage, callback PH value, chloride ion enrichment, high alkalinity, and analysis system Easy to fouling and other problems

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