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

A bio-stability, water-conveying pipe technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high heterotrophic colony count and low residual chlorine concentration

Inactive Publication Date: 2019-09-27
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 water quality biological stability of long-distance water delivery pipe network
  • Chlorine supplementing method for guaranteeing water quality biological stability of long-distance water delivery pipe network
  • Chlorine supplementing method for guaranteeing water quality biological stability of long-distance water delivery pipe network

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Experimental program
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specific Embodiment approach 1

[0235] Specific implementation mode 1: In this implementation mode, the method of supplementing chlorine to ensure the water quality and biological stability of the long-distance water delivery pipe network is carried out according to the following steps:

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

[0237] 2. Establish the residual chlorine decay model and the DBPs generation and consumption model for the water outlet of the clean water tank of the water intake plant, and take samples at the sampling port of the main water distribution pipe to detect the water quality of the feed water to test and optimize the water quality model;

[0238] 3. Taking the filtered water of the water plant as the object, measure the ammonia nitrogen con...

specific Embodiment approach 2

[0241] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the method for setting up residual chlorine decay model described in step two is as follows:

[0242] Measure 50mL of the water out of the clean water tank of the water intake plant and add it to a 50mL stoppered colorimetric tube to obtain multiple samples. Treat different samples to measure the residual chlorine concentration. , the water sample has existed for tt water age,

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

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

[0245] (2) There is a fixed ratio s(DBPs) between the production of various DBPs and the consumption of residual chlorine;

[0246] (3) The consumption reactions of various DBPs are first-order reactions based on...

specific Embodiment approach 3

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

[0258] Take 50mL of the water from the clear water tank of the water intake plant and add it to a 50mL stoppered colorimetric tube to obtain multiple samples. Add ascorbic acid to the bottle to quench the reaction of DBPs, and then measure the concentration of various DBPs to obtain the concentration of DBPs in water samples of different water ages, and use tt to represent the hydraulic retention time of the clear water tank, because when water is taken from the outlet of the clear water tank, the water sample already exists tt water age;

[0259] The following four assumptions are made in building the model:

[0260] (1) The decay reaction of residual chlorine and the formation of DBPs during actual disinfection are first-order reactions based on the con...

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Abstract

The invention discloses a chlorine supplementing method for guaranteeing the water quality biological stability of a long-distance water delivery pipe network, and relates to a chlorine supplementing method for guaranteeing the water quality biological stability of the long-distance water delivery pipe network. The invention aims to solve the problems of low residual chlorine concentration and high heterotrophic colony number in water at the tail of the existing urban and rural overall planning long-distance water delivery pipe network. The method comprises the following steps of: mounting a residual chlorine on-line detector and an on-line flow 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 an area with the lowest residual chlorine concentration limit value, and determining the quantity and positions of chlorine supplementing points according to the ammonia nitrogen concentration of filtered water and the residual chlorine attenuation model to supplement chlorine. By adopting the chlorine supplementing method, the problems of low concentration of residual chlorine and high heterotrophic colony number in the water at the tail of the existing urban and rural overall planning long-distance water delivery pipe network are solved, the biological stability of the water quality at the tail of the pipe network is effectively guaranteed, and the occurrence of serious peculiar smell in water due to overhigh chlorine input is avoided. The invention belongs to the field of water treatment.

Description

technical field [0001] The invention relates to a method for supplementing chlorine to ensure the biological stability of water quality in a long-distance water delivery pipe network. Background technique [0002] Under 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 relatively complex, and the distribution of water quality in the pipe network is uneven, especially at the end of the water supply pipe network, where the water stays in the pipe for a long time. The complex physical, chemical and biological effects in the pipelines easily lead to 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 excessive concentration of residual chlorine in the pipe network also It will cause a strong odor in the water and is no...

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 武晓飞陈忠林沈吉敏王斌远孔艳丽
Owner HARBIN INST OF TECH
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