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A method for ensuring the stability of water quality in a water supply network when switching between water sources

A technology of water quality stability and water supply pipe network, applied in water supply equipment, water supply equipment, water supply main pipeline, etc., can solve the problem of "yellow water" phenomenon and other problems

Active Publication Date: 2018-05-01
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

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of "yellow water" that may occur in the transportation process due to the change of water quality in the existing urban water supply network, and to reduce the risk of "yellow water" in the existing technology. , to provide a method for ensuring the stability of water quality in the water supply pipe network when the water source is switched. The method of the present invention has high accuracy in predicting the risk of "yellow water". "phenomenon, effectively guarantee the safety of water supply in the pipe network, and the method of the present invention is convenient, simple and quick

Method used

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  • A method for ensuring the stability of water quality in a water supply network when switching between water sources
  • A method for ensuring the stability of water quality in a water supply network when switching between water sources
  • A method for ensuring the stability of water quality in a water supply network when switching between water sources

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] 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.

[0080] 1. Determination of the original water quality of the pipe network in the area where the water source is to be switched

[0081] 1-1. According to the determination method of the corresponding water quality parameters in "Water and Wastewater Monitoring and Analysis Methods (4th Edition)", the water quality parameters of the original water were measured, and the measurement results are as follows:

[0082]

[0083] Among them, a portable water quality analyzer (HACH, HQ40d) with a dissolved oxygen probe (HACH, LDO101) is used to measure dissolved oxygen (mg / L); according to the acid-base indicator in "Water and Wastewater Monitoring and Analysis Methods (4th Edition)" Titrimetric determination of total alkalinity (as CaCO 3 total hardness (in terms of CaCO 3 Determination of sulfate (mg / L), chloride ion (mg / L) and ni...

Embodiment 2

[0120] As an example, a certain surface water is a new water source, and the original water supply with groundwater as the water source is replaced.

[0121] 1. Determination of the water quality of the original water

[0122] 1-1. According to the determination method of the corresponding water quality parameters in "Water and Wastewater Monitoring and Analysis Methods (4th Edition)", the water quality parameters of the original water flow were measured, and the water quality parameters of the original flow water were measured. The measurement results are as follows:

[0123]

[0124] 1-2. Carry out unit conversion for the water quality parameters of the original water measured above, and convert them into mol / L;

[0125] 1-3. Substitute the water quality parameters after unit conversion into the formula (I), and calculate the water quality corrosiveness judgment index (WQCR 原 ), the original water quality corrosiveness judgment index (WQCR 原 ) calculation result is 0.15...

Embodiment 3

[0147] 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.

[0148] 1. Determination of the water quality of the original water

[0149] 1-1. According to the determination method of the corresponding water quality parameters in "Water and Wastewater Monitoring and Analysis Methods (4th Edition)", the water quality parameters of the original water were measured, and the measurement results are as follows:

[0150]

[0151] 1-2. Carry out unit conversion for the water quality parameters of the original water measured above, and convert them into mol / L;

[0152] 1-3. Substitute the water quality parameters after unit conversion into the formula (I), and calculate the water quality corrosiveness judgment index (WQCR 原 ), the original water quality corrosiveness judgment index (WQCR 原 ) calculation result is 0.225;

[0153] 2. Determination of water quality of new wat...

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Abstract

The invention provides a method for ensuring water quality stability of a water supply network during switching of water sources. The method comprises following steps: testing water quantity corrosivity determination indicators of two water sources and making comparisons; directly switching a new source to supply water if the determination parameter difference between the new water source and water quantity corrosivity of original water is less than or equal to 0.08; adding proportions to gradually increase for mixature if the determination parameter difference between the new water source and water quantity corrosivity of original water is greater than or equal to 0.08 for supplying water to the pipe network till all water sources are completely switched. The method for ensuring water quality stability of a water supply network during switching of water sources has following beneficial effects: on the condition that water supply sources are needed to be switched, water quality of the water supply pipe network is stable; little influence is exerted to existing physical and chemical proprieties and a microbic system so that yellow water is effectively avoided; risk prediction of yellow water is high in accuracy so that the method plays a guiding role in ensuring stability of water quality of the pipe network; and the method is convenient and feasible and is easy and quick.

Description

technical field [0001] The invention belongs to the field of pipe network safety transmission and distribution in drinking water treatment, and relates to a method for ensuring the stability of water quality of a water supply pipe network, in particular to a method for ensuring the stability of water quality of a water supply pipe network under the condition of switching water sources. 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 distribution ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E03B1/02E03B7/07
CPCE03B1/02E03B7/071
Inventor 李玉仙赵蓓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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