Continuous pretreatment system and process for pirimiphos-methyl wastewater

Abstract

The invention discloses a continuous pretreatment system and process for pirimiphos-methyl wastewater. The system comprises a wastewater storage tank, a first water pump, a heater, a three-dimensionalelectrocatalytic oxidation stripping tower, a first cooler, a neutralization kettle, a second water pump and a settling tank which are sequentially communicated, wherein the three-dimensional electrocatalytic oxidation stripping tower comprises a stripping tower and a three-dimensional electrocatalytic oxidation device arranged in the stripping tower. The process adopts the system to carry out continuous pretreatment on the pirimiphos-methyl wastewater. According to the system, the equipment cost can be reduced; meanwhile, the continuous treatment of the pirimiphos-methyl wastewater can be realized, energy is saved, labor intensity is reduced, and the system has the characteristics of remarkable treatment effect, low investment, low operation cost, convenience in engineering popularization and application and the like; the process has the advantages of simple process, convenience in operation, low cost, low energy consumption, high treatment efficiency, good treatment effect and the like, and has very important significance for realizing advanced treatment of the pirimiphos-methyl wastewater.

Description

technical field [0001] The invention belongs to the field of treatment of pirimiphos-methyl wastewater, and relates to a continuous pretreatment system and process for pirimiphos-methyl wastewater. Background technique [0002] Pirimiphos-methyl is a broad-spectrum, high-efficiency, low-toxic organophosphorus insecticide and acaricide, widely used in storage, household sanitation, crops and other pest control, however, a large amount of The sewage has not only seriously hindered the expansion of its production capacity, but more importantly, the treatment of the resulting wastewater has become a top priority. [0003] According to its production process, pirimiphos-methyl wastewater can be divided into three sections: synthesis of guanidine, synthesis of pyrimidinol, and synthesis of pirimiphos-methyl. There are eight streams of wastewater in total. The total volume of wastewater: 10 tons 废水 / Ton 产品 . The pirimiphos-methyl wastewater contains a variety of toxic and harmfu...

AI Technical Summary

Problems solved by technology

In the prior art, the adsorption method is usually used to treat methyl pyrimidine wastewater. For example, Zhang Yan et al. use bentonite as adsorption for methyl pyrimidine wastewater, and Lei Lianglin et al. use lignin / bentonite as a composite adsorbent for the treatment of methyl pyrimidine wastewater. However, there are inherent defects in the adsorption method in the treatment methods of these pirimiphos-methyl wastewaters, which only transfer pollutants from water to adsorbents, and do not fundamentally solve the problem of environmental hazards from pollution sources

Based on the unsolvable defects in the adsorption method, Li Ming et al. proposed a method of electrocatalytic oxidation to remove pyrimiphos-methyl in wastewater. The lead alloy plate was used as the anode and the stainless steel plate was used as the cathode. COD is removed by electrocatalytic oxidation. However, this method is an outdated two-dimensional electrocatalytic oxidation technology, which has problems such as high energy consumption, low current efficiency, long mass transfer distance, etc., and cannot meet the needs of practical applications.

In addition, for how to effectively treat pirimiphos-methyl wastewater, there is no mature and effective industrialized treatment method at home and abroad.

Images