Method for electrolytic disinfection of recirculated cooling water

A technology of circulating cooling water and cooling water, which is applied in the direction of sterilization/microdynamic water/sewage treatment, etc., and can solve the problem of low sterilization rate

Active Publication Date: 2013-09-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical action of the electrolysis method has direct sterilization ability, but the sterilization rate is low, which is mainly sterilized by the chemical action of the electrolysis product

Method used

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  • Method for electrolytic disinfection of recirculated cooling water
  • Method for electrolytic disinfection of recirculated cooling water
  • Method for electrolytic disinfection of recirculated cooling water

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Electrolytic sterilization of a circulating cooling water system, the process is as follows figure 1 As shown, the circulating water volume is 100m 3 / h, the target residual chlorine concentration of the cooling water system is 0.4mg / L, and it runs continuously for 31 days.

[0040] First, the concentration of chlorine ions in the cooling water was analyzed to be 200mg / L, and the COD value was 100mg / L.

[0041] Secondly, calculate the coefficient a to determine the relationship between the generation rate of active chlorine and the current and concentration of chloride ions. For this purpose build as figure 2 In the test device shown, the chloride ion concentration in the test water is 200mg / L, the COD is 0mg / L, the calcium hardness and conductivity are the same as the cooling water, and the test water volume is 10m 3 , run for 1h.

[0042] Set the electrolysis current to 10A, and the measured residual chlorine concentration is 0.2mg / L. According to the residual ch...

Embodiment 2

[0051] Electrolytic sterilization of a circulating cooling water system, the process is as follows figure 1 As shown, the circulating water volume is 80m 3 / h, the target residual chlorine concentration of the cooling water system is 0.3mg / L, and it runs continuously for 31 days.

[0052] First, the concentration of chloride ions in the cooling water was analyzed to be 150mg / L, and the COD value was 80mg / L.

[0053] Secondly, calculate the coefficient a to determine the relationship between the generation rate of active chlorine and the current and concentration of chloride ions. Using the same test device as in Example 1, since a is only related to the electrode size, material, and electrode spacing, the coefficient a=0.001. The relationship between the generation rate of active chlorine and the current and chloride ion concentration is:

[0054] Active chlorine generation rate (g / h) = 0.001 × chloride ion concentration (mg / L) × current (A)

[0055] Then, in figure 1 Whe...

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Abstract

The invention relates to a method for electrolytic disinfection of recirculated cooling water. The method is characterized in that an electrolytic current is controlled according to a chloride ion concentration and a chemical oxygen demand (COD) value of recirculated cooling water so that a concentration of an electrolysate is kept in a required range and thus it is guaranteed that a concentration of an electrolysate reaches to a required value and it is avoided that because of an over-high concentration of an electrolysate, harmful effects are produced.

Description

technical field [0001] The invention relates to an electrolytic sterilization method of circulating cooling water. Background technique [0002] In the industrial circulating cooling water system, the concentration and enrichment of nutrients and suitable water temperature create favorable conditions for the growth of microorganisms. If not controlled, microorganisms will multiply rapidly and produce a large amount of biological slime, which adheres to pipelines and Cooling equipment, resulting in a reduction in thermal efficiency and corrosion of piping and equipment. [0003] Microbial control methods mainly include chemical and physical methods. The most commonly used method is the chemical method, that is, by adding various chemical agents to the water to control microorganisms. The chemical method has low cost and good effect, but the chemical method also has the disadvantages of deteriorating water quality, complicated operation process, inability to adapt to water q...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/467
Inventor 谭丽李本高余正齐李亚红傅晓萍
Owner CHINA PETROLEUM & CHEM CORP
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