Solutions
Solutions
The main composition of leakage: based on the analysis of the composition of leakage water in the water balance table of China Water Association, and referring to the leakage rate control cases of many domestic water supply enterprises. Leakage (rate) composition of domestic water supply enterprises includes:
1、Physical leakage: usually more, generally accounting for 55-75% of its leakage;
2、Table (measurement) leakage: relative physical leakage less, usually accounting for 15-30% of the leakage;
3、Others: refuse to copy, steal water, private takeover line, etc., usually less about 10-15% of its leakage.
Shanghai Keyontechs leakage control management system applies the minimum flow at night, according to the ALR theory, utilizes the Internet of Things, and adopts high-end sensing devices (such as A+k electromagnetic water meter, leakage warning and leakage point positioning system). The leakage control system can quickly warn the leakage section after detecting the leakage area in the zoning metering management. This system is a deep integration of the new generation of information technology and water technology. It fully explores the value and logical relationship of data, realizes the intelligent control, data resource, precise management and intelligent decision-making of water business system, guarantees the safe operation of water facilities, and makes water business operation more efficient, management more scientific and service more quality. At the same time, the system can be compatible with the existing revenue system, GIS system, SCADA system, hydraulic model and other systems of the department of Water Resources, or incorporated into the comprehensive information management platform of the department of Water Resources, to help the construction of smart water resources of the Department of Water Resources.
The selection of surface is the top priority of leakage control work, is also the most rapid, direct results of leakage control means. Electromagnetic water meter has the characteristics of high precision, low starting flow, small flow metering sensitive and accurate, high stability, low power consumption, low installation environment requirements, wide flow rate range, high protection level, no pressure loss, remote monitoring and anti-interference. It is necessary to gradually use and replace large-diameter electromagnetic water meters according to demand, especially to manage the leakage control of non-resident users' trade settlement income and residents' meter leakage.
The effect of non-resident large users' trade settlement is direct and easy to implement. However, the leakage management of residential meters and water management of public utilities need to be strengthened in a multi-pronged manner, including: The use of remote examination form, regular calibration, improve the copy rate, rectify the behavior of private connection and flip, carry out the investigation of the nature of water use, strengthen the management of buried table, promote the fire alarm device, increase the metering and supervision of water use without table, strengthen the strength of business inspection and improve the management level of table management, so as to reduce leakage and continuously reduce the leakage rate.
Based on DMA partition measurement, improve the control level of physical leakage of pipe network and shorten the duration of leakage to reduce physical leakage; At the same time, reasonable pressure management is carried out according to the comprehensive water supply situation such as the water supply area topography, pipe network and water use characteristics, so as to reduce the physical leakage of the stock and reduce the occurrence of pipe explosion and new leakage.
DMA zoning metering management is a system engineering involving many factors, no matter the three-level or more fine zoning metering management, or the implementation of bottom-up or top-down implementation steps, should be based on the water supply enterprises own situation, or step by step construction and even selective implementation.
Shanghai Keyontechs has implemented zoning metering management of water supply enterprise experience data and water leakage detection project data (leakage point, leakage and pipe network diameter relationship - the number of leakage points in the district pipe network accounts for about 75% of the total number of leakage points, leakage water accounts for about 61% of the total leakage water), leakage points in the district. The DMA is the most easy to build and manage, DMA night minimum flow monitoring fluctuations sensitive, in theory can be found water leakage time control within 24 hours, the most easy to see the results, so DMA construction should be listed as the first link of the division measurement (in addition to the first division assessment management purpose) and the important link of leakage control management.
Water difference between production and sales = free water supply + physical water leakage + book water leakage
According to the International Water Association (IWA), the analysis and statistics are as follows:
The physical leakage ratio of pipe network is significant: according to the analysis table of the production and sales difference of the International Water Association, and refer to the leakage control cases of many domestic water supply enterprises. In the leakage rate of domestic water supply enterprises, physical leakage accounts for relatively large, generally accounting for 55-75% of the leakage rate, and the overflow of water tank and pool accounts for very little, so the control of physical leakage of pipe network is the key to leakage control.
Physical leakage control, no matter the size of the leak point, should be a short period of detection, the necessary partition measurement work and system leak detection engineering, do early detection early repair, especially small leakage point is often not easy to detect, but it causes water leakage for a long time, the total amount of water leakage is large, but is an important factor causing leakage.
Efficient leakage control based on zoning measurement can quickly warn abnormal areas and greatly shorten the time for leakage point discovery. However, accurate positioning of leakage point still requires professional personnel to use professional instruments. Professional leakage control team and professional technology are the guarantee of leakage control results.
Shanghai Keyontechs has more than 50 professional leakage control personnel, which can conduct a comprehensive, professional and systematic water leakage survey and positioning of the water supply network in a short period. In particular, water supply enterprises without refined zoning metering management need short period, full coverage and systematic water leakage detection work.
In the leakage control work, Shanghai Keyontechs can help the water supply enterprises to train the actual operation personnel of leakage detection and establish the leakage control team, to provide professional technical support for the leakage control work of the water department; It can also help water supply enterprises to explore their own leakage control mode and system, so as to establish a professional and sustainable leakage control platform and mechanism.
Cooperative mode I
Party A's responsibilities and obligations
1、Put in management and cooperate with personnel to provide management leadership and implementation convenience for leakage control work;
2、Purchase basic hardware required for leakage control (electromagnetic water meter/flowmeter, leakage location equipment);
3、Responsible for timely excavation and repair of leakage points; Calibration or replacement of problem meter;
4、Provide vehicles (transport and leak location equipment).
Responsibilities and obligations of Party B
1、Invest in professional leakage control team (project manager and professional leakage control personnel);
2、Responsible for the overall design and implementation of leakage control work and technical support of hardware installation;
3、Responsible for leak control operation and leak detection and positioning in the later stage;
4、Free of charge to Party A's relevant personnel leakage control operation, equipment application, technical methods training.
Mutual income
1、Establish professional leakage control platform and long-term leakage control management mechanism to improve water supply and water-saving management level;
2、Directly reduce leakage and improve enterprise efficiency.
Party B:1、According to the amount of water saved (the proportion of both parties to negotiate) or accurate location of water leakage point cost income.
Cooperation mode II
Party A's responsibilities and obligations
1、Put in management and cooperate with personnel to provide management leadership and implementation convenience for leakage control work;
2、Responsible for timely excavation and repair of leakage points;
3、Provide vehicles (transport and leak location equipment).
Responsibilities and obligations of Party B
1、Invest in professional leakage control team (project manager and professional leakage control personnel);
2、Responsible for the overall design and implementation of leakage control work and technical support of hardware installation;
3、Provide basic hardware required for leakage control (electromagnetic water meter/flowmeter, leakage location equipment);
4、Calibration or replacement of problem meter;
5、Responsible for leak control operation and leak detection and positioning in the later stage;
6、Free of charge to Party A's relevant personnel leakage control operation, equipment application, technical methods training.
Mutual income
1、Establish and harvest professional leakage control platform and long-term leakage control management mechanism to improve water supply and water-saving management level;
2、Reduce leakage and improve efficiency;
Party B：1、After deducting the input of hardware cost, the income is based on the amount of water saved (the proportion discussed by both parties) and the cost of accurate positioning of water leakage point.
Tik Tok
Tik Tok