Intensifying pretreatment device for treatment of high-salt wastewater of dicamba

Abstract

The invention relates to the field of wastewater treatment, in particular to an intensifying pretreatment device for treatment of high-salt wastewater of dicamba. The intensifying pretreatment devicecomprises a water collecting pool, a regulating pool, a reaction pool, a neutralization pool, a degassing pool and a coagulative precipitation pool which are arranged sequentially along a wastewater treatment process, wherein the regulating pool is connected with the reaction pool through a first connecting pipe, stirring devices are arranged in the reaction pool, and a first material inlet and asecond material inlet are formed in the top of the reaction pool; the reaction pool is connected with the neutralization pool through a second connecting pipe, a pH automatic control device is arranged on one side of the neutralization pool, and the neutralization pool, degassing pool and coagulative precipitation pool are connected through a third connecting pipe and a fourth connecting pipe respectively. The wastewater pretreatment process is completed through sequential treatment in the regulating pool, reaction pool, neutralization pool, degassing pool and coagulative precipitation pool, and since the pretreatment device has low investment cost and the pretreatment process which can intensify high-salt wastewater, evaporation and crystallization of subsequent wastewater can thus be facilitated.

Description

Technical field [0001] The invention relates to the field of wastewater treatment, in particular to an enhanced pretreatment device for dicamba high-salt wastewater treatment. Background technique [0002] High-salt wastewater refers to wastewater with a salt content of at least 1% by mass. Most of this wastewater contains high-concentration inorganic salts, refractory organics, heavy metals, and SS, which are difficult to biologically treat. Biodegradable organic pollutants refer to organic matter that is slowly decomposed by microorganisms and incompletely decomposed. It also includes the metabolites of certain organic matter. Such pollutants have good chemical stability and exist for a long time in the environment. It can be enriched through the food chain and endanger human health. [0003] High-salt wastewater mainly comes from the concentrated liquid produced by the industrial water treatment reverse osmosis system and the high-salt wastewater produced by chemical, pharmaceu...

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Problems solved by technology

[0003] High-salt wastewater mainly comes from concentrated liquid produced by industrial water treatment reverse osmosis systems and high-salt wastewater produced by chemical, pharmaceutical and other enterprises. For example, the production of dicamba will produce a large amount of high-salt wastewater; in addition, with the rapid development of my country's industry , the environmental pollution and hazards caused by refractory high-salinity wastewater are becoming more and more serious, which directly leads to a significant increase in the salinity of water quality, accelerates the process of salinization and desertification, and has a serious negative impact on the ecological environment

[0004] With the shortage of water resources, more and more people pay more and more attention to the treatment and recycling of wastewater (high salt content), and the treatment and recycling rate of wastewater is closely related to its pretreatment. If the wastewater pretreatment system is improper, it will lead to the waste water Hardness, silicon, and turbidity are not completely removed, resulting in fouling and serious fouling of the subsequent membrane system and evaporation crystallization system; the concentration multiple of the membrane concentration system is low, which increases the investment and operating costs of the subsequent evaporation crystallization system; the output of the evaporation crystallization system Mixed miscellaneous salt has no use value, and the content of organic matter is high, so it can only be treated as hazardous waste, and the cost is extremely high

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