Circulating pipe network water quality comprehensive simulation test system with multi-channel flow switching calibration

Abstract

The invention discloses a circulating pipe network water quality integrative simulation test system with multichannel flow switching and calibrating devices. The system comprises a water supply subsystem and an independent circulating pipe network subsystem, wherein the water supply subsystem comprises a first water supply water tank and a second water supply water tank; the first water supply water tank is provided with a water inlet, a water outlet and a chemical filling hole; the second water supply water tank is communicated with the first water supply water tank by a pipeline with a second valve and is provided with a water inlet, a water outlet and a chemical filling hole; the independent circulating pipe network subsystem is a loop comprising a main circulating pump, a multichannelflow switching and calibrating device and a high-level water replenishing and exhausting water tank which are connected in series by virtue of pipelines; the loop is connected with a first pipeline branch for realizing closed circulation, a water replenishing system, an emptying branch, a water quality online monitoring system and a temperature control system; and meanwhile, chemical filling systems are also connected on the pipeline of the independent circulating pipe network subsystem. All the components of the system cooperate with each other and the system has the advantages of high simulation degree and capability of simulating various working conditions of municipal water supply pipe network systems.

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 circulating pipe network with multi-channel flow switching calibration. 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 co...

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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 operating temperature of the real water supply mains network

[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 polluted water quality mutation, and secondary chlorine addition to the pipe 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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