A comprehensive simulation test system for water quality of circulating pipe network with static water pipe section

Abstract

The invention discloses a circulation pipe network water quality comprehensive simulation test system with a stationary water pipe section, which comprises a water supply subsystem and an independent circulation pipe network subsystem; the water supply subsystem comprises a first water supply water tank and a second water supply water tank which is communicated with the first water supply water tank by a pipeline with a second valve; the independent circulation pipe network subsystem comprises a main circulating pump, a multichannel flow-switching calibration device, a visible pipe section, and a loop of a high-level water-supplementing exhausting water tank which are in serial connection by pipelines; the loop is connected with a first pipeline branch, a water-supplementing system, an emptying system, a water quality on-line monitoring system, a temperature-control system, a replacement pipe section branch, and a stationary water pipe section which are used to realize closed circulation. Meanwhile, a medicament injecting system is connected to the pipeline of the independent circulation pipe network subsystem. With the mutual cooperation of each part, the circulation pipe networkwater quality comprehensive simulation test system has the advantages of high fidelity, and capability of simulation of conditions of various actual municipal water supply pipe network systems.

Description

Technical field [0001] The invention relates to the technical field of test simulation systems for drinking water supply pipe networks, in particular to a comprehensive simulation test system for water quality of a circulating pipe network with static water pipe sections. Background technique [0002] The water supply network is an important part of the urban water supply system. Its function is to transport the water that has been purified by the water plant and meets the national drinking water quality standards to the user terminal. The effluent quality indicators of most water plants in my country can meet or exceed the national drinking water quality standards, but when delivered to users through pipe networks, they often fail to meet the standards and even endanger the health of users. The data shows that the water quality of the water plant from the factory to the user shows a significant decline in water quality, which is mainly manifested in the increase in the content o...

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 The impact of water quality; it is impossible to simulate the phenomenon of "dead water" in some branches of the actual municipal water supply network

[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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