Chlorine supplementing method for guaranteeing biological stability of water quality of long-distance water delivery pipe network

A technology of biological stability and water delivery pipes, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low residual chlorine concentration and high number of heterotrophic colonies

Active Publication Date: 2019-11-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of low residual chlorine concentration and high number of heterotrophic bacterial colonies in the terminal water of the existing urban and rural long-distance water delivery network, and provide a method to ensure the biological stability of water quality in long-distance water delivery network. Chlorine Supplementary Method

Method used

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  • Chlorine supplementing method for guaranteeing biological stability of water quality of long-distance water delivery pipe network
  • Chlorine supplementing method for guaranteeing biological stability of water quality of long-distance water delivery pipe network
  • Chlorine supplementing method for guaranteeing biological stability of water quality of long-distance water delivery pipe network

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specific Embodiment approach 1

[0235] Specific embodiment 1: The chlorine supplement method for ensuring the biological stability of the water quality of the long-distance water pipeline network in this embodiment is carried out according to the following steps:

[0236] 1. Select the target water distribution network in the area, analyze the correlation between residual chlorine in the water and HPC, and determine the minimum concentration of residual chlorine in the water for the water distribution network to ensure the biological stability of the water quality;

[0237] 2. Take the effluent from the clean pool of the water plant, establish a residual chlorine attenuation model and a DBPs generation and consumption model, and take a sample at the water distribution main sampling port to detect the water quality to verify and optimize the water quality model;

[0238] 3. With the filtered water of the water plant as the object, the ammonia nitrogen concentration of the filtered water is measured and verified by th...

specific Embodiment approach 2

[0241] Specific embodiment two: This embodiment is different from the specific embodiment one in that the method for establishing the residual chlorine attenuation model described in step two is as follows:

[0242] Take the effluent from the clean pool of the water plant, measure 50mL and add it to a 50mL colorimetric tube with a stopper to obtain multiple samples, process different samples to determine the residual chlorine concentration, and tt represents the hydraulic retention time of the clean pool, because when water is taken from the outlet of the clean pool , The water sample already exists tt's water age,

[0243] The following four assumptions were put forward in establishing the residual chlorine attenuation model:

[0244] (1) The attenuation reaction of residual chlorine and the formation of DBPs during actual disinfection are first-order reactions based on residual chlorine concentration;

[0245] (2) There is a fixed ratio s (DBPs) between the amount of generated DBPs ...

specific Embodiment approach 3

[0257] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the method for establishing the DBPs generation and consumption model described in step two is as follows:

[0258] Take the effluent from the clean pool of the water plant, accurately measure 50mL and add it to a 50mL colorimetric tube with stopper to obtain multiple samples, and accurately measure 30mL of water samples and add them to a 40mL Agilent screw-top sample bottle to obtain multiple samples. Add ascorbic acid to the bottle to quench the formation reaction of DBPs, and then measure the concentration of various DBPs to obtain the concentration of DBPs in water samples of different water ages. tt represents the hydraulic residence time of the clear pool, because when the water is taken from the water outlet of the clear pool, the water sample already exists tt Water age

[0259] The following four hypotheses were put forward in establishing the model:

[0260] (1) The a...

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Abstract

The invention discloses a chlorine supplementing method for guaranteeing biological stability of water quality of a long-distance water delivery pipe network, and relates to a chlorine supplementing method for guaranteeing biological stability of water quality of the long-distance water delivery pipe network. The method aims to solve the problems of low residual chlorine concentration and high heterotrophic colony count in the end water of the existing urban and rural planning long-distance water pipe network. The method comprises: arranging a residual chlorine on-line detector and an on-lineflow meter on a water conveying pipe network; and calculating residual chlorine values of other points of the water delivery pipe network through a residual chlorine attenuation model, determining anarea with the lowest residual chlorine concentration limit value, and determining the number and positions of chlorine supplementing points according to the ammonia nitrogen concentration in the filtered water and the residual chlorine attenuation model to supplement chlorine. By adopting the chlorine supplementing method, the problems of low residual chlorine concentration and high heterotrophiccolony count in the end water of the existing urban and rural overall planning long-distance water delivery pipe network are solved, the biological stability of the end water quality of the pipe network is effectively guaranteed, and the occurrence of heavy peculiar smell in the water caused by overhigh chlorine adding amount is avoided. The invention belongs to the field of water treatment.

Description

Technical field [0001] The invention relates to a chlorine replenishment method for ensuring the biological stability of water quality in a long-distance water pipeline network. Background technique [0002] In the urban-rural integrated water supply mode, the service scope of the water supply pipe network is relatively large, the structure of the pipe network is also more complicated, and the water quality in the pipe network is unevenly distributed, especially at the end of the water supply pipe network, where the water stays in the pipe for a long time. Complicated physical, chemical, and biological effects in the pipeline can easily cause deterioration of water quality, which makes the water quality at the end of the pipe network not effectively guaranteed, and affects the service level of the water supply pipe network system; on the contrary, the residual chlorine concentration in the pipe network is too high. It will cause heavy peculiar smell in the water, which is not sui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q50/06G06F17/18C02F1/76C02F1/50
CPCG06F17/18G06Q50/06C02F1/50C02F1/76C02F2209/29C02F2209/14C02F2209/40Y02A20/152
Inventor 陈忠林武晓飞沈吉敏王斌远孔艳丽
Owner HARBIN INST OF TECH
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