A comprehensive water quality simulation test system for a circulating pipe network with a replacement pipe section

Abstract

The invention discloses a water quality comprehensive simulation test system with replacement pipe sections for a circulating pipe network. The system comprises a water supply subsystem and independent circulating pipe network subsystems. The water supply subsystem includes a first water supply tank and a second water supply tank communicated with the first water supply tank through a pipeline with a second valve. Each independent circulating pipe network subsystem includes a main circulating pump, a multichannel flow switch calibration device, a visible pipe section and a loop of a high water supplement and exhaust tank that are connected in series by a pipeline. The loop is in connection with a first pipeline branch for realizing closed circulation, a water supplement system, a blowdownbranch, a water quality on-line monitoring system, a temperature control system and replacement pipe section branches. Meanwhile, the pipeline of the independent circulating pipe network subsystem isalso connected to a reagent filling system. Making use of the interaction among all parts, the water quality comprehensive simulation test system for a circulating pipe network has the advantages of high simulation degree and ability to simulate the working conditions of a plurality of municipal water supply pipe networks.

Description

technical field [0001] The invention relates to the technical field of a test simulation system for a drinking water supply pipe network, in particular to a water quality comprehensive simulation test system for a circulation pipe network with a replacement pipe section. Background technique [0002] The water supply pipe network is an important part of the urban water supply system. Its function is to deliver water that meets the national drinking water quality standards after being purified by the water plant to the user terminal. The water quality indicators of most waterworks in my country can meet or exceed the national drinking water quality standards, but when it is delivered to users through the pipe network, it often fails to meet the standards and even endangers the health of users. According to the data, the water quality of the water plant shows a trend of decreasing obviously from the factory to the user, mainly manifested in the increase of the content of iron,...

AI Technical Summary

Problems solved by technology

[0008] Every time the circulating water sample flows through the reservoir, it is in contact with the air in a large area, which will affect the quality of the circulating water; and the raw water pool participates in the pipe network cycle test, and the water flow conditions are somewhat different from the actual pipe network

[0009] 2. Insufficient control of conditions

[0010] It is impossible to pressurize the full pipe flow in the circulation pipeline, and it is impossible to simulate the pressurized operating environment of the real main water supply pipe network; the temperature of the test water in the circulation pipeline is easily affected by the temperature of the four seasons in the environment, and it is impossible to control the temperature to simulate being buried in the ground The actual operating temperature of the main water supply pipe network; it is impossible to confirm that the air in the pipe is completely discharged when the circulation pipe network test is initialized, and the "full pipe flow" is completely achieved, and it is impossible to observe the changes in the flow state, biological and chemical environment in the pipe in real time, and understand the water quality changing situation

[0011] 3. The simulation working condition is single

[0012] It is impossible to realize the simulation of various complex working conditions such as multi-water source switching, dual water source mixed water supply, external source polluting water quality mutation, pipe network secondary chlorination and other complex working conditions; it is impossible to observe the internal corrosion of the pipeline without affecting the long-term continuous cycle test conditions Scaling and biofilm bacteria growth, it is impossible to sample and analyze pipe scale and biofilm bacteria; it is impossible to investigate the impact of pipe service life on the water quality of the pipe network, and to study the impact of scaling and biofilm bacterial shedding on different water supply pipes that have been in operation for many years water quality impact

[0013] 4. Large analog distortion

[0014] The most influential factor affecting the residual chlorine decay of the actual pipe network is the water temperature of the pipe network. If the test system cannot control the temperature, there will be a large error with the actual pipe network operation results; a single electromagnetic flow rate is used for the test water flow in the circulating pipe network Meter detection is used as the flow control feedback of the system. A single electromagnetic flowmeter cannot accurately detect within the full range. For example, when the circulating pipe network test needs to simulate the small flow operating conditions of the actual water supply pipe network, the flow detection error will be greatly increased. , which affects the flow control accuracy of the test and produces a large flow simulation distortion

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