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Cleaning and sterilizing method of circulating water system, and bactericide

A technology of circulating water system and bactericide, which is applied in the direction of cleaning methods and appliances, biocides, chemical instruments and methods, etc., can solve the problems that cannot be used in a large area, cannot completely kill Legionella bacteria, organisms, etc., to solve corrosion problem effect

Active Publication Date: 2013-03-27
广州和智智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot be used in a large area, and when the water velocity increases to a certain extent, it cannot completely kill bacteria and organisms such as Legionella in the water.

Method used

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  • Cleaning and sterilizing method of circulating water system, and bactericide
  • Cleaning and sterilizing method of circulating water system, and bactericide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The following methods are used to clean and sterilize the central air-conditioning circulating water system of each station of Guangzhou Metro Line 8, and the method includes the following steps:

[0031] 1. Slime peeling

[0032] Use a high-pressure jet device to clean the cooling tower, heat sink and surrounding environment of the circulating water system, remove the dust, sludge and scale on the cooling tower, provide a good external environment, and reduce the influencing factors; add biological slime to strip When the chemical agent is used, the cooling pump is turned on to circulate for 16-24 hours. During this period, the water samples are analyzed for the chemical content in different periods. When the chemical content decreases, the biological slime stripping agent is added to maintain the content of the biological slime stripping agent in the circulating water system. 200ppm to effectively strip biological slime in the circulating water system. After the biol...

Embodiment 2

[0048] The circulating water system of the central air conditioner is treated with the same method as in Example 1, and the treatment time is the peak season of the central air conditioner: in August, the central air conditioner has a circulating water system of the same size and the same concentration multiple. The difference from Example 1 is that the Legionella bactericide of the killing group and the Legionella bactericide of the operating group are different.

[0049] The killing group Legionella bactericide of the invention group includes the following components by weight: 30 parts of glutaraldehyde, 30 parts of sodium 3-chloroisocyanurate, 25 parts of HEDP, and 15 parts of zinc sulfate; it is prepared by the following method : Put glutaraldehyde, sodium 3-chloroisocyanurate, HEDP and zinc sulfate into the reaction kettle, control the temperature at 10°C~20°C, stir at high speed for 2~3 hours, and then kill the Legionella bacteria agent; the operating group Legionella b...

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Abstract

The invention discloses a cleaning and sterilizing method of a circulating water system. The cleaning and sterilizing method comprises the following steps of (1) stripping slime: cleaning the circulating water system by high-pressure spray, feeding a biological slime stripping agent to strip the biological slime; (2) carrying out descalling and derusting treatment: feeding neutral cleaning fluid, a copper corrosion inhibitor and a dispersing agent to descale and derust; (3) membrane pretreatment: feeding a composite prefilming agent to carry out membrane pretreatment; and (4) killing legionella: feeding a bactericide for killing the legionella to sterilize. By adopting the method disclosed by the invention, the legionella in the circulating water system can be completely and thoroughly killed; and a corrosion problem of the circulating water system in the treatment process can be solved at the same time. Meanwhile, the legionella bactericide for the cleaning and sterilizing method is also provided by the invention; and the legionella bactericide is divided into the bactericide for killing the legionella and the bactericide for operating the legionella. The two bactericides can be used in a matching manner; the legionella in the circulating water system can be thoroughly killed, and meanwhile, the situation that the legionella does not reappear in the circulating water system is effectively ensured.

Description

technical field [0001] The invention relates to a method for cleaning and sterilizing a central air-conditioning circulating water system and a bactericide used, in particular to a method for sterilizing Legionella in a central air-conditioning circulating water system and the bactericide used. Background technique [0002] The water temperature in the central air-conditioning circulating water system is very suitable for the growth and reproduction of Legionella. The propagation temperature of Legionella is 20°C~45°C, and the optimum propagation temperature is 36°C~40°C. The positive rate of Legionella is 100%. . Therefore, the cooling circulating water system of the central air conditioner is the source and birthplace of Legionella. [0003] The traditional treatment methods for Legionella in the central air-conditioning circulating water system include physical treatment methods and chemical treatment methods. Chemical treatment methods such as chlorine killing method, o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B9/027B08B9/032A61L2/18A01N43/64A01N35/02A01N59/16A01N43/80A01N33/12A01P1/00A61L101/44A61L101/32A61L101/30
Inventor 肖贤声陈树锦曾子芳肖贤凯
Owner 广州和智智能科技有限公司
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