Compound disinfectant for circulating water systems

A composite fungicide and circulating water system technology, applied in the directions of biocides, biocides, herbicides and algicides, can solve the problems of increased water treatment costs, easy foaming, long application time, etc. medicinal effect

Inactive Publication Date: 2009-11-18
ZHEJIANG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long application time of quaternary ammonium salts in our country, long-term use will easily cause microorganisms to de

Method used

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  • Compound disinfectant for circulating water systems
  • Compound disinfectant for circulating water systems
  • Compound disinfectant for circulating water systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Prepare the medicine according to the following ratio:

[0018] The compound bactericide is compounded by the aqueous solution of three substances A, B, and C. It is calculated in 1L of water, and 1.4g of tribenzylphenylphosphonium chloride, 2.3g of dithiocyanomethane, and 0.14g of copper sulfate are added to it. well mixed.

[0019] 1) Dosing the configured chemicals in the cooling water circulation system, the concentrations of the three substances in the circulation water system are 10mg / L, 20mg / L, 30mg / L, 40mg / L, 50mg / L, 60mg / L, According to the method stipulated by industrial circulating cooling water, the killing rate of heterotrophic bacteria was measured by plate counting method, and the results are shown in Table 1:

[0020] Table 1 Killing effect of compound fungicides on heterotrophic bacteria

[0021]

[0022] 2) Dosing the prepared chemicals in the cooling water circulation system, the concentrations of the three substances in the circulation water sys...

Embodiment 2

[0032] Prepare the medicine according to the following ratio:

[0033] The compound fungicide is composed of three substances A, B, and C compounded in an aqueous solution, and in 1L of water, 1.5g of tribenzylphenylphosphonium chloride, 2.5g of dithiocyanomethane, and 0.15g of copper sulfate are added. well mixed.

[0034] Dosing this agent in the cooling water circulation system, the concentration of the three substances in the circulation water system is 40mg / L, and at the same time, dosing the penetrant dimethylformamide (DMF) in the circulation water system, DMF in the circulation water system The concentrations in the solution are 70mg / L, 75mg / L, 80mg / L, 85mg / L, and 90mg / L respectively. According to the method stipulated in industrial circulating cooling water, the killing rate of heterotrophic bacteria is determined by the plate counting method. The results are shown in the table 5 shows:

[0035] Table 5 Killing effect of compound fungicides and DMF on heterotrophic ...

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PUM

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Abstract

The invention discloses a compound disinfectant for circulating water systems, comprising benzyltribenzyl phosphonium chloride, dithiocyano-methane and copper sulfate. When the compound disinfectant is used, if certain amount of penetrant is added, the synergistic effect among drugs can be brought into full play, and not only the antibacterial activity can be effectively improved but also microorganisms can be avoided from generating resistance to drugs due to long-term use of single variety of disinfectants. The compound disinfectant of the invention has good disinfection and algae elimination effects and low use cost, simultaneously solves the problem of resistance of bacteria to common disinfectants and is suitable for circulating cooling water systems, reclaimed water circulating systems, clean drainage recycling systems or other circulating water systems.

Description

technical field [0001] The invention relates to a composite bactericide, which is suitable for circulating cooling water systems, reclaimed water circulating systems, clean sewage recycling systems or other circulating water systems. Background technique [0002] Cooling water is continuously recycled in the system. Due to the rise of water temperature, long-term circulation and concentrated utilization will cause problems such as corrosion, scaling and biological slime. As the nutrients needed for microbial growth continue to concentrate, and its temperature and pH are more suitable for the growth of most microorganisms, it often leads to an increase in the number of microorganisms in the cooling water system, which in turn leads to a series of hazards such as microbial scaling and corrosion, resulting in circulating cooling. The reduction of water system efficiency and life will cause great harm to industrial production. Scaling, corrosion, and microbial reproduction in c...

Claims

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Application Information

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IPC IPC(8): A01N59/20A01N57/34A01N47/48A01P1/00A01P13/00C02F1/50
Inventor 姜晨竞孟建民沈东升吴玉勇何若龙於洋方程冉胡立芳姚俊李文兵郑元格王静
Owner ZHEJIANG UNIV
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