Plate type heat exchanger on-site testing system with non-clean water as heat exchange medium

Abstract

The invention relates to a plate type heat exchanger field experiment system taking unpurified water as a heat exchanging medium. The experiment system comprises a plate type heat exchanger to be detected, a heat pump, a load plate type heat exchanger, a self-washing filter, a water storage tank, a water replenishing tank, a water pump system, an unpurified water source and a pipeline connecting the parts. The invention can independently simulate the floating working situation of the plate type heat exchanger in an unpurified water source ground on the spot and has the advantages of compact system structure, energy saving, environment protecting and large working situation adjusting range. The experiment system can be used for carrying out the experiment research on the scale formation characteristics of the unpurified water and the scale formation countermeasure scheme in the plate type heat exchanger and the optimization design scheme of the unpurified water plate type heat exchanger. The experiment data acquired has important guiding significance on the long period safe and economic operation of the unpurified water plate type heat exchanger.

Description

technical field [0001] The invention relates to an experimental equipment of a plate heat exchanger, in particular to an on-site experimental system of a plate heat exchanger using unclean water as a heat exchange medium. Background technique [0002] The aggravation of the energy crisis has prompted people to continuously accelerate the development and utilization of renewable energy. River water, river water, lake water, sea water, urban and industrial sewage, and recycled water after urban and industrial sewage treatment contain a large amount of low-level heat energy. The heat pump technology using the above-mentioned water bodies as cold and heat sources has significant energy-saving and environmental protection benefits, and has been recognized as a renewable energy technology with great application potential. As a high-efficiency heat exchanger, the plate heat exchanger has a small footprint, high heat transfer coefficient, and low unit cost. It is one of the preferr...

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Problems solved by technology

[0005] The research on fouling rule of unclean water in plate heat exchanger and its effect on heat transfer performance has the following three characteristics: 1) The experimental water quality is complex: not only various ions are dissolved in water bodies such as seawater, river water and urban reclaimed water, etc. , suspended solids, and also contain a high number of microorganisms or macro organisms; 2) Long experiment period: the fouling process of unclean water in the plate heat exchanger has a long period, and the experiment usually needs to be carried out continuously for 20 days or even longer , it is necessary to maintain the tested plate heat exchanger in a relatively stable working condition during the test period; 3) The test working conditions are complex: the fouling process of unclean water on the heat exchange surface is greatly affected by temperature conditions, so It is often necessary to adjust the water temperature in a large range (10 ~ 80 ℃)

[0006] From the above three characteristics, it can be judged that the traditional experimental method cannot be applied to the research of the performance of the non-clean water plate heat exchanger. The reasons are: 1) water source problem: it is impossible to obtain a real and stable experimental water source in the laboratory; 2) economical 3) temperature problem: the temperature of the cold source is limited by the environment, making it impossible to obtain experimental water below the ambient temperature; when the temperature of the heat source is low, use a boiler The temperature control of the heating method is difficult

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