Distribution method for ensuring water quality stability of water supply pipe network during water source switching

A water supply network and water source technology, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of "yellow water" and "yellow water" occurrence time and other issues

Active Publication Date: 2017-01-04
北京市自来水集团有限责任公司技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to aim at reducing the occurrence of "yellow water" due to the change of water quality in the existing urban water supply pipe network and the phenomenon of "yellow water" in the transportation process and the occurrence of "yellow water" for a long time. Risk of technical problems existing in the existing technology, providing a method to ensure the stability of water quality in the water supply network under the condition of switching water supply sources

Method used

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  • Distribution method for ensuring water quality stability of water supply pipe network during water source switching
  • Distribution method for ensuring water quality stability of water supply pipe network during water source switching
  • Distribution method for ensuring water quality stability of water supply pipe network during water source switching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Taking a certain surface water as a new water source as an example, replace the original water supply with groundwater as the water source.

[0099] 1. Determination of the original water quality of the pipe network in the area where the water source is to be switched

[0100] 1-1. Determination of the water quality parameters of the original water, wherein the dissolved oxygen (mg / L) is measured by using a portable water quality analyzer (HACH, HQ40d) with a dissolved oxygen probe (HACH, LDO101); according to the "Water and Wastewater Monitoring and Analysis Method ( The 4th edition) "acid-base indicator titration method to determine total alkalinity (as CaCO 3 total hardness (in terms of CaCO 3 Determination of sulfate (mg / L), chloride ion (mg / L) and nitrate (in N, mg / L). The measurement results are as follows:

[0101]

[0102] Among them, "Water and Wastewater Monitoring and Analysis Methods (4th Edition)" was edited by the editorial board of "Water and Waste...

Embodiment 2

[0148] Taking a certain surface water as a new water source as an example, replace the original water supply with surface water as the water source.

[0149] 1. Determination of the original water quality of the pipe network in the area where the water source is to be switched

[0150] 1-1. Determination of the water quality parameters of the original water, wherein the dissolved oxygen (mg / L) is measured by using a portable water quality analyzer (HACH, HQ40d) with a dissolved oxygen probe (HACH, LDO101); according to the "Water and Wastewater Monitoring and Analysis Method ( The 4th edition) "acid-base indicator titration method to determine total alkalinity (as CaCO 3 total hardness (in terms of CaCO 3 Determination of sulfate (mg / L), chloride ion (mg / L) and nitrate (in N, mg / L). The measurement results are as follows:

[0151]

[0152] 1-2. The water quality parameters of the original water to be measured: sulfate (mg / L), chloride ion (mg / L), total alkalinity (as Ca...

Embodiment 3

[0184] Taking surface water as the new water source as an example, replace the original water supply in the mixed water supply area of ​​surface water and groundwater.

[0185] 1. Determination of the original water quality of the pipe network in the area where the water source is to be switched

[0186] 1-1. Determination of the water quality parameters of the original water, wherein the dissolved oxygen (mg / L) is measured by using a portable water quality analyzer (HACH, HQ40d) with a dissolved oxygen probe (HACH, LDO101); according to the "Water and Wastewater Monitoring and Analysis Method ( The 4th edition) "acid-base indicator titration method to determine total alkalinity (as CaCO 3 total hardness (in terms of CaCO 3 Determination of sulfate (mg / L), chloride ion (mg / L) and nitrate (in N, mg / L). The measurement results are as follows:

[0187]

[0188] 1-2. The water quality parameters of the original water to be measured: sulfate (mg / L), chloride ion (mg / L) and t...

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Abstract

The invention provides a distribution method for ensuring the water quality stability of a water supply pipe network during water source switching. The method comprises the steps of measuring a water quality difference index (WQDI) of a new water source and raw through water; if the WQDI of the new water source and the raw through water is less than or equal to 0.30, directly switching the new water source for supplying water for the pipe network; if the WQDI of the new water source and the raw through water is larger than 0.30, mixing the new water source and the raw through water; selecting a blending mixed water with the WQDI of the mixed water and the raw through water being less than or equal to 0.30, and the highest addition proportion of the new water source; gradually increasing the addition proportion of the new water source after the pipe network is adapted until only the new water source exists. According to the method provided by the invention, under the condition of switching a water supply source, the water quality stability of the water supply pipe network can be ensured, the influence on physicochemical properties and a microbic system in a pipeline is less, the prediction on a yellow water occurrence risk is accurate, the occurrence of the yellow water phenomenon can be prevented, and the method has important directive significance on ensuring the water quality stability of the water supply pipe network during water source switching, is convenient and easy to implement, and is simple and fast.

Description

technical field [0001] The invention belongs to the field of pipe network safe transmission and distribution in drinking water treatment, and relates to a deployment method for ensuring water quality stability of a water supply pipe network, in particular to a deployment method for ensuring stable water quality of a water supply pipe network under the condition of water source switching. Background technique [0002] With the development of society and economy, the demand for water resources, especially drinking water resources, is increasing. Long-distance water transfer, seawater desalination and comprehensive utilization of multiple water sources have become the main ways to solve the problem of water shortage in water-scarce cities. However, the water quality characteristics of different water sources are different. After the water source is switched, the water quality of the water plant entering the pipeline network may deteriorate during the transmission and distributio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00
CPCC02F1/008C02F2209/001C02F2209/055C02F2209/07C02F2209/22
Inventor 赵蓓李玉仙王敏刘永康李礼虞睿柴文林爱武
Owner 北京市自来水集团有限责任公司技术研究院
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