A device for studying the stability of pipe network water quality under in-situ simulated water source switching conditions

Abstract

The invention provides equipment for studying pipe network water quality stability under the condition of simulating water source switch in situ, wherein the equipment comprises an in-situ test tube section for testing and a movable device. The in-situ test tube section for testing is obtained by separating a selected tube section of a water supply system and performing pre-connection treatment. The movable device comprises a water quality parameter detection device, a water quality regulation device and a running device. The water quality parameter detection device comprises a sampling device and a detection device; the water quality regulation device comprises at least one dosing system; the running device is used for connecting all devices for unified designing and programming to test the required water flow status and provide the power required by water flow. The equipment can realize in-situ simulation, can be connected with other equipment in situ on a place where the tube section is located, can simulate changes of water quality and flow state of a water source in an actual water supply pipe network, so as to obtain simulation data which is more accurate and reliable and closer to the actual status, and is beneficial to perform the reasonable prediction on the change of the pipe network water quality under the condition of water source switch.

Description

technical field [0001] The invention belongs to the field of safe transmission and distribution of drinking water supply pipe network water quality, and in particular relates to a device for studying the stability of pipe network water quality under in-situ simulated water source switching conditions. Background technique [0002] With the development of society and economy, people's demand for water resources, especially drinking water resources, is increasing day by day. In order to ensure the quality of drinking water leaving the factory, domestic and foreign water plants have added pretreatment, advanced treatment and other processes on the basis of conventional water supply treatment processes according to the water source conditions. However, when the factory water reaches the standard, the turbidity, chroma, and iron content of the user's outlet water may still exceed the standard. This is because during the long-term operation of the water supply pipe network, due t...

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Problems solved by technology

[0006] However, since the generation and release of corrosion products in the water supply pipe network is a complex reaction process, including physical, chemical, biological and other effects, in the process of cutting and sampling the pipe section and bringing it back to the laboratory, first of all, due to vibration, Oxidation, dehydration and other problems affect the corrosion products and microorganisms in the pipeline, resulting in changes in the scale in the pipe section, which affects the credibility of the experimental data; secondly, after the pipe section is brought back to the laboratory, if the length of the pipe section is not enough, it will be difficult to Simulate the water flow state in the actual pipe network. The water flow in the actual pipe section is axial, and the pipe scale will have certain characteristics under the influence of such a long-term water flow direction, and the horizontal circulation generated by stirring is used to approximate the actual feed-back pipe. The flow condition of vertical water flow, the direction of water flow is inconsistent with the direction of water flow in the original pipe section, when chemical reaction with pipe scale occurs, the reaction rate and equilibrium conditions will be different, which may lead to a discrepancy between the test results and the actual water quality changes big difference

At the same time, because most of the tap water supply pipe networks in service are buried underground, the ground needs to be excavated for pipe section sampling, and the length and location of sampling will be limited by various objective conditions such as ground buildings, which brings certain difficulties to pipe section cutting and sampling

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