Circulating cooling water sterilizing method and application

A technology of circulating cooling water and circulating water cooling, applied in chemical instruments and methods, sterilization/microdynamic water/sewage treatment, natural water treatment, etc., can solve the problem of increasing power consumption, reducing current efficiency, increasing periodic reversal The frequency of electrode polarity and other issues can ensure the life of the electrode and avoid the reduction of electrolytic current efficiency.

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Aiming at the problem of electrolytic sterilization, it is reported in the literature that two methods can be used to deal with it. One is to increase the frequency of periodically reversing the electrode polarity. The disadvantage is that the current efficiency is reduced and the electrode life is shortened.
The second method is to increase the electrolysis current to increase the gas generated on the electrode surface, thereby greatly enhancing the turbulence on the electrode surface, making it difficult for easily adsorbed substances in water to reach the electrode surface, but this method increases power consumption

Method used

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  • Circulating cooling water sterilizing method and application
  • Circulating cooling water sterilizing method and application
  • Circulating cooling water sterilizing method and application

Examples

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Effect test

Embodiment 1

[0051] This embodiment is used to illustrate the sterilization method of circulating cooling water of the present invention.

[0052] Test water quality and electrolysis device as in Comparative Example 1, adjust the flow rate of circulating water entering the electrolysis device to 4.0m through a flow meter 3 / h, after electrolysis for 1.5h, stop electrolysis for 2min, 5min, 10min and 20min respectively, then continue electrolysis for 1.5h, investigate the change of residual chlorine mass concentration in circulating water after different time of electrolysis and continue electrolysis, the specific data are as follows image 3 shown. image 3 Indicates the changes in the mass concentration of residual chlorine in the outlet circulating water after 1.5 hours of electrolysis and after the electrolysis was stopped for 2 minutes, 5 minutes, 10 minutes and 20 minutes and then the electrolysis was continued.

[0053] from image 3 It can be seen from the data in the figure that t...

Embodiment 2

[0055] This embodiment is used to illustrate the sterilization method of circulating cooling water of the present invention.

[0056] Test water quality and electrolysis device as in Comparative Example 1, adjust the flow rate of circulating water entering the electrolysis device to 4.0m through a flow meter 3 / h, according to the electrolysis 20min, electrolysis 10min periodical operation, continuous operation 10h, investigate the change of residual chlorine mass concentration in the circulating water at the outlet of the electrolysis device. Specific data such as Figure 4 shown. Figure 4 Indicates: 5min, 10min, 15min of each periodic operation (the mass concentration of residual chlorine reaches the maximum value of about 4.6mg / L), 20min, 25min, and 30min (the mass concentration of residual chlorine drops to about 0.19mg / L). The mass concentration of residual chlorine in the outlet circulating water.

[0057] from Figure 4 It can be seen from the data in that, accordi...

Embodiment 3

[0059] This embodiment is used to illustrate the sterilization method of circulating cooling water of the present invention.

[0060] Test water quality and electrolysis device as in comparative example 1, adjust the flow rate of circulating water entering the electrolysis device to 2.4m through a flow meter 3 / h, according to the electrolysis 20min, electrolysis 10min periodical operation, continuous operation 10h, investigate the change of residual chlorine mass concentration in the circulating water at the outlet of the electrolysis device. Specific data such as Figure 5 shown. Figure 5 Indicates: 5min, 10min, 15min, 20min (mass concentration of residual chlorine reaches the maximum value of about 5.4mg / L), 25min, 30min (mass concentration of residual chlorine drops to about 0.29mg / L) of each periodic operation. The mass concentration of residual chlorine in the outlet circulating water.

[0061] from Figure 5 It can be seen from the data in that, according to this c...

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Abstract

The invention discloses a circulating cooling water sterilizing method and application. The circulating cooling water sterilizing method comprises the step of electrolyzing at least one part of circulating cooling water in a circulating cooling water system, wherein an electrolyzing process is performed intermittently. According to the electrolysis sterilizing method for the circulating cooling water, provided by the invention, reduction in electrode activity and electrolytic current efficiency can be effectively avoided, mass concentration of residual chlorine in the circulating cooling water is enabled to be in a control range, service lives of electrodes are guaranteed, and extra electricity consumption is not increased.

Description

technical field [0001] The invention relates to a sterilization method and application of circulating cooling water. Background technique [0002] The circulating cooling water system is a special ecological environment suitable for the growth of various microorganisms. The massive reproduction of microorganisms will bring a series of hazards to the circulating water system, such as slime deposition, pipe blockage, heat transfer efficiency reduction, equipment corrosion, etc. Therefore, the microbial control of the cooling water system is one of the important contents of the circulating water treatment technology one. [0003] Microbial control methods mainly include chemical control, physical control and electrolysis. The most commonly used method is the chemical control method, that is, by adding various chemical fungicides to the water, using the fungicides to kill and control the growth of microorganisms. The chemical method is low cost and effective, but the chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467
CPCC02F1/467C02F2103/023C02F2303/20
Inventor 王金华余正齐李本高
Owner CHINA PETROLEUM & CHEM CORP
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