A method for adding chlorine to secondary water supply and storage equipment

Abstract

The invention discloses a method for supplementing chlorine to secondary water supply and storage equipment. The method comprises the following steps: quantitatively diluting a high-concentration sodium hypochlorite stock solution to a concentration range allowed by laws and regulations by using a diluting device consisting of two small diluting tanks, and adding the diluted high-concentration sodium hypochlorite stock solution into a water tank to improve the residual chlorine concentration of tap water in the water tank. The method has the beneficial effects that the compliance problem of using the sodium hypochlorite stock solution to disinfect the drinking water is solved, the problems in manufacturing, transportation and installation are solved, and the method is simple and easy to implement.

Description

technical field [0001] The invention relates to the field of secondary water supply of urban water supply pipe network systems, in particular to a method for adding chlorine to secondary water supply and storage equipment. Background technique [0002] At present, most of the disinfection of urban drinking water (commonly known as tap water) in my country is disinfected with chlorine-containing disinfectants. After adding chlorine-containing disinfectants to tap water, it can maintain sufficient residual chlorine concentration in the tap water pipe network system for a long time. So as to ensure that the microorganisms in the tap water are controlled within the acceptable range. Residual chlorine refers to the amount of available chlorine remaining in water after the chlorine-containing disinfectant is in contact with the water for a certain period of time when the chlorine-containing disinfectant is used for disinfection. Available chlorine refers to the reaction between a ...

AI Technical Summary

Problems solved by technology

The secondary water supply and storage equipment (hereinafter referred to as the water tank), as the end of the urban water supply network system, is responsible for the last barrier to ensure the safety of tap water. The tap water will stay in the water tank for a period of time. If the stay time is too long, the concentration of residual chlorine may Attenuation to a very low level will not effectively kill microorganisms in the water, causing the microbial indicators of the tap water in the water tank to exceed the standard

But in actual application process, this prior art still exists following defect: 1) its available chlorine content of the sodium hypochlorite solution of purchase is very high (the available chlorine content of 10% sodium hypochlorite solution is 100g / L), can not directly add into water tank Because the high-concentration sodium hypochlorite solution takes a long time to mix with the tap water in the water tank after it enters the water tank, and the tap water in it is used continuously, which makes it easy for the added high-concentration sodium hypochlorite solution to be directly mixed without mixing. Being used by users, this will bring harm to the health of users; 2) high-concentration sodium hypochlorite solution will also cause corrosion of water tanks or connecting pipes because of its strong corrosiveness; 3) there is no real-time detection of the available chlorine content of sodium hypochlorite solution added, The calculation has been based on the available chlorine content marked at the time of purchase. This method will cause a serious shortage of dosage due to the attenuation of sodium hypochlorite solution after a period of time, and the effectiveness of killing microorganisms in water will be greatly reduced; 4) This technology only adjusts the addition of sodium hypochlorite The speed of the solution, but the sodium hypochlorite solution has been added and in practice, the residual chlorine concentration of the tap water in the water tank is qualified in most cases, which can ensure the safety of the tap water, so it is not necessary to add sodium hypochlorite in most cases solution to increase the remaining chlorine concentration, while wasting sodium hypochlorite solution, it may also endanger the health of users

Images