Secondary water supply high-quality high-price full life cycle service method

Abstract

The invention relates to the technical field of urban water supply, particularly discloses a secondary water supply high-quality high-price full life cycle service method, and aims to solve the problems of fragmentation, low management efficiency, insufficient water quality guarantee and over-high energy consumption of the existing secondary water supply service. According to the method, a whole-process service system of'planning design-construction implementation-operation maintenance-facility evaluation-transformation upgrading 'is constructed, an intelligent monitoring technology, an energy-saving optimization technology and a water quality guarantee technology are combined, and whole-cycle fine management of the secondary water supply system from construction to scrapping is achieved. By means of the method, the standard reaching rate of water quality can be increased to 99% or above, energy consumption is reduced by 20%-30%, the water supply stability is improved to 98% or above, the secondary water supply service quality and the industry management level are remarkably improved, and the method has wide market application value and popularization prospects.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of urban water supply, and particularly relates to a high-quality high-performance full life cycle service method for secondary water supply. BACKGROUND

[0002] With the acceleration of urbanization, the number of high-rise buildings has increased significantly. As an important part of the urban water supply system, secondary water supply is responsible for delivering municipal network water to high-rise users, directly related to the safety of residents' water use and the quality of life. However, there are many problems in current secondary water supply services: Service fragmentation: existing services are mostly focused on a single link (such as equipment installation or routine maintenance), lacking overall management throughout the system's full life cycle, with planning and design disconnected from later operational needs, resulting in low system efficiency; Inadequate water quality protection: due to lack of timely maintenance, some secondary water supply facilities have problems such as water tank pollution and pipe corrosion, making it difficult to maintain water quality standards and posing a risk to drinking water safety; High energy consumption: traditional secondary water supply equipment mostly uses constant speed operation mode, without dynamic adjustment according to water consumption changes, resulting in energy waste and high operating costs; Low management efficiency: relying on manual inspection and paper records, data collection is not timely or accurate, and fault diagnosis is delayed, making it impossible to achieve real-time control of system status.

[0003] To address the above problems, the industry urgently needs a comprehensive service method that covers the full life cycle of secondary water supply, integrates intelligent technology, and takes into account water quality safety and energy saving needs, to improve the overall operation quality and management level of the secondary water supply system. The present application is proposed in this regard. SUMMARY

[0004] The purpose of the present application is to provide a full life cycle service method for secondary water supply, solving the problems of service fragmentation, inadequate water quality protection, high energy consumption, and low management efficiency of existing secondary water supply services, and achieving fine and intelligent management of the secondary water supply system throughout its life cycle. The present application uses the following technical solutions.

[0005] A high-quality high-performance full life cycle service method for secondary water supply, comprising the following steps: (1) Planning and design stage: based on building type, water demand prediction data, and regional water supply status, using a combination of hydraulic model simulation and energy consumption estimation, complete equipment selection, pipe network layout, and energy saving scheme design for the secondary water supply system, forming a standardized design scheme; (2) Construction implementation stage: based on the planning and design scheme, establish a construction quality control system, and monitor the equipment installation precision, pipe connection sealing, and system debugging parameters in real time; (3) Operation and maintenance stage: Real-time collection of water quality indicators, equipment operation parameters and pipe network state data through Internet of Things sensors, transmission to the cloud management platform, platform based on preset threshold to realize fault warning and generate periodic maintenance plan, at the same time, ultraviolet disinfection and membrane filtration combined process is adopted to ensure water quality safety; (4) Facility evaluation stage: Comprehensive evaluation of secondary water supply system every 3-5 years, evaluation indicators include equipment aging degree, pipe network leakage rate, energy efficiency and water quality standard, the weight of each indicator is determined by AHP, an evaluation report is formed and the system grade is determined; (5) Renovation and upgrading stage: For the system evaluated as "to be transformed", combined with the latest technical standards and user demand changes, develop a transformation plan, preferentially use frequency conversion energy-saving equipment and intelligent monitoring modules, and conduct a 3-month trial operation monitoring after transformation.

[0006] Further, in the planning and design stage, the water demand prediction adopts the method of "historical data regression analysis + regional population growth prediction", the prediction period covers 15-20 years of system design service life, the hydraulic model adopts EPANET software to build, and the pressure distribution of the pipe network under different water peak values is simulated to ensure that the most unfavorable point water supply pressure is not less than 0.15MPa.

[0007] Further, the cloud management platform in the operation and maintenance stage has data storage, analysis, visualization display and remote control functions, when the water quality indicators exceed GB5749-2022 "Drinking Water Health Standards" or the equipment parameters are abnormal, the platform automatically sends warning information to the management personnel terminal, and starts the standby water supply scheme, and generates a fault handling process guide.

[0008] Further, in the facility evaluation stage, the pipe network loss rate detection adopts the joint monitoring method of ultrasonic flowmeter and pressure sensor, and the key nodes of the pipe network are monitored continuously for 24 hours, the leakage rate is calculated by "water supply and water consumption difference method", and the evaluation report needs to include system status analysis, problem list and subsequent treatment suggestions.

[0009] Further, in the renovation and upgrading stage, the frequency conversion energy-saving equipment adopts PID control algorithm, automatically adjusts the water pump speed according to the real-time water consumption, the energy consumption monitoring adopts intelligent electric meter to realize sub-metering, and the transformed system needs to be formally put into use after passing the sampling detection of water quality detection agency and the acceptance of third-party engineering.

[0010] Compared with the prior art, the beneficial effects of the present application are: 1. Water quality safety is significantly improved: Through the optimization of water quality guarantee scheme in the planning and design stage, real-time monitoring and periodic disinfection in the operation and maintenance stage, and equipment updating in the transformation and upgrading stage, the secondary water supply water quality compliance rate can be stabilized at more than 99%, effectively solving the problems of water tank pollution, pipeline corrosion and other problems, and ensuring the safety of drinking water for residents 2. Energy consumption is greatly reduced: By using frequency conversion energy-saving equipment and intelligent control technology, combined with energy consumption calculation optimization in the planning and design stage, the energy consumption of the secondary water supply system per unit of water supply can be reduced by 20%-30%, which can save a lot of operation cost for water supply enterprises every year, and meet the requirements of national energy saving and emission reduction policy: 3. Management efficiency is improved: Relying on the cloud management platform to realize real-time data collection, analysis and early warning, replacing traditional manual inspection and paper records, the fault troubleshooting time is shortened by more than 50%, and at the same time, the whole process information sharing is realized, which improves the fine and intelligent level of industry management; 4. System life is extended: Through the standardized management of the whole life cycle, including quality control in the construction stage, regular maintenance in the operation stage and timely transformation after evaluation, the design service life of the secondary water supply system can be extended from 15 years to more than 20 years, which reduces the repeated construction investment and reduces resource waste. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0012] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, as used in the specification and claims herein, are intended to cover not exclusively inclusive.

[0013] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0014] To further illustrate the implementation effect of the present application, the following will be combined with a secondary water supply reconstruction project of an old community to be described in detail: The community was built in 2005, and there are 800 households of existing residents. The secondary water supply system adopts traditional constant-speed water pump and concrete water tank, and the following problems exist: The water quality compliance rate is only 92%, and the residual chlorine is insufficient many times; the aging of equipment leads to unstable water supply pressure, and high-rise users have difficulty in water use during peak period; the unit water supply energy consumption is 0.45 kWh / m, which is 30% higher than the average level of the industry; the pipe network leakage rate reaches 18%, and water resources are seriously wasted. Based on this, the secondary water supply full life cycle service method of the present application is used to reconstruct the system.

[0015] Planning and design stage Collect the community water data, predict the water load growth of 15% in the next 5 years, and determine the system design scale of 120 m3 / d; adopt EPANET model simulation, optimize the pipe network layout, select 2 variable frequency water pumps (one for use and one for standby), and select stainless steel water tank (replace the original concrete water tank) and ultraviolet disinfection + membrane filtration combined equipment; review and pass the design scheme, and clearly define the water quality target (compliance rate > 99%), energy consumption target (≤0.3 kWh / m3) and leakage rate. Target ≤12%.

[0016] Construction implementation stage Quality inspection is performed on the incoming variable frequency water pump, stainless steel water tank and membrane filtration equipment to ensure compliance with national standards. The original equipment and pipes are removed, and the new equipment is installed. Pressure test is used to detect the pipe sealing property (test pressure 0.6 MPa, pressure holding for 30 minutes without leakage). After system debugging, the water pump runs stably at 0.2-0.3 MPa, the water quality treatment equipment has water turbidity ≤0.5 NTU, and the residual chlorine is 00.3 mg / L, which meets the design requirements.

[0017] Operation and maintenance stage Install Internet of Things sensors to monitor water tank water quality, water pump operating parameters and pipe network pressure in real time. Data is transmitted to the cloud platform. Develop monthly maintenance plans to clean the water tank and calibrate the sensors every month. Check the water pump seals and test the pipe network pressure every quarter. Within 6 months of operation, the platform issued 2 warnings (1 for low residual chlorine, automatically starting standby disinfection equipment; 1 for abnormal water pump current, replacing the bearing in time), and there were no cases of water quality exceeding the standard or water stoppage.

[0018] Facility evaluation stage Evaluation is carried out 1 year after the reconstruction is completed. The test results show that the water quality compliance rate is 99.5%, the water pump operating efficiency is 85%, the pipe network leakage rate is 10%, the unit water supply energy consumption is 0.28 kWh / m3, the comprehensive score is 88 points, and the system level is "excellent".

[0019] Subsequent management The cloud platform-based continuous monitoring system monitors the operation state of the system, pushes water quality reports to residents every quarter, plans to conduct a comprehensive evaluation again after 5 years, and develops a maintenance or reconstruction plan for the next stage according to the evaluation results.

[0020] Implementation effect;

[0021] After the reconstruction, the secondary water supply system of the community achieves the following improvements: the water quality compliance rate is increased from 92% to 99.5%, the resident water usage satisfaction is increased from 75% to 98%, the unit water supply energy consumption is reduced from 0.45 kWh / m to 0.28 kWh / m 3 , about 30,000 yuan of electricity is saved annually, the pipe network leakage rate is reduced from 18% to 10%, about 12,000 m of water resources is saved annually, the water supply pressure is stable, the high-rise user water usage problem in the peak period is completely solved, and the practicability and effectiveness of the method are fully verified.

[0022] The above-described and above-embodied examples are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

[0023] Other embodiments of the present application will be readily apparent to those skilled in the art upon considering the specification and practicing the present application as disclosed. The present application is intended to cover any variations, uses or adaptive changes of the present application following the general principles of the present application and encompassing common knowledge or conventional technical means in the art disclosed by the present application. The specification and examples are only regarded as exemplary, and the true scope of the present application is indicated by the claims.

Claims

1. A method for providing high-quality, cost-effective, and full-lifecycle services for secondary water supply, characterized in that: Includes the following steps: (1) Planning and Design Stage: Based on building type, water demand forecast data and regional water supply status, a combination of hydraulic model simulation and energy consumption calculation is used to complete the equipment selection, pipeline layout and energy-saving scheme design of the secondary water supply system, forming a standardized design scheme; (2) Construction and implementation phase: Based on the planning and design scheme, establish a construction quality control system to monitor the equipment installation accuracy, pipeline connection sealing and system debugging parameters in real time; (3) Operation and maintenance phase: Water quality indicators, equipment operating parameters and pipeline status data are collected in real time through IoT sensors and transmitted to the cloud management platform. The platform realizes fault early warning based on preset thresholds and generates periodic maintenance plans. At the same time, a combination of ultraviolet disinfection and membrane filtration process is used to ensure water quality safety. (4) Facility assessment phase: A comprehensive assessment of the secondary water supply system is conducted every 3-5 years. The assessment indicators include the degree of equipment aging, pipeline leakage rate, energy efficiency and water quality compliance. The weight of each indicator is determined by the analytic hierarchy process, an assessment report is generated and the system level is determined. (5) Upgrading and transformation phase: For systems assessed as "needing to be upgraded", a transformation plan is formulated in combination with the latest technical standards and changes in user needs. Frequency conversion energy-saving equipment and intelligent monitoring modules are given priority. After the upgrade, a trial operation monitoring period of 3 months is carried out.

2. The method for providing high-quality, cost-effective, and full-lifecycle secondary water supply services according to claim 1, characterized in that: During the planning and design phase, water demand forecasting adopts a combination of "historical data regression analysis + regional population growth forecasting". The forecast period covers the system design service life of 15-20 years. The hydraulic model is constructed using EPANET software to simulate the pipeline pressure distribution under different water consumption peaks, ensuring that the water supply pressure at the most unfavorable point is not lower than 0.15MPa.

3. The method for providing high-quality, cost-effective, and full-lifecycle services for secondary water supply according to claim 1, characterized in that: The cloud management platform during the operation and maintenance phase has data storage, analysis, visualization and remote control functions. When water quality indicators exceed GB5749-2022 "Standards for Drinking Water Quality" or equipment parameters are abnormal, the platform automatically sends an early warning message to the management personnel terminal, activates the backup water supply plan, and generates a fault handling process guide.

4. The method for providing high-quality, cost-effective, and full-lifecycle secondary water supply services according to claim 1, characterized in that: The pipeline loss rate detection during the facility assessment phase adopts a combined monitoring method of ultrasonic flow meter and pressure sensor to continuously monitor key nodes of the pipeline network 24 hours a day. The leakage rate is calculated using the "difference between water supply and water consumption method". The assessment report must include a system status analysis, a list of existing problems and subsequent handling suggestions.

5. The method for providing high-quality, cost-effective, and full-lifecycle services for secondary water supply according to claim 1, characterized in that: During the upgrade phase, the frequency conversion energy-saving equipment adopts a PID control algorithm to automatically adjust the pump speed according to the real-time water consumption. Energy consumption monitoring uses smart meters to achieve sub-item metering. The upgraded system can only be officially put into use after passing the sampling test by the water quality testing agency and the acceptance by a third-party project.