Lifting film type evaporator comprehensive test experiment system

Abstract

The invention discloses a lifting film type evaporator comprehensive test experiment system. The system comprises a cooling medium pipeline unit, a steam pipeline unit, a test heat exchanger unit anda data measurement and control unit, wherein the cooling medium pipeline unit comprises a heating water tank, a centrifugal pump, a turbine flowmeter, a small heat exchanger, various valves and linkage pipelines; the steam pipeline unit comprises a steam generator, a pressure stabilization tank, a steam regulation valve, a vortex shedding flowmeter, a condensation tank, various valves and linkagepipelines; the test heat exchanger unit comprises a main heat exchanger, a gas-liquid separator, a plate type heat exchanger and the linkage pipelines; the data measurement and control unit comprisesflow measurement and control, temperature measurement and control, pressure measurement and control and condensate measurement. The lifting film type evaporator comprehensive test experiment system provided by the invention is compact in structure, convenient to operate, low-cost in operation, reliable in performance, capable of accurately simulating operation work conditions of a lifting film type evaporation/ reboiler under various working conditions, capable of preforming comparative test for heat transfer performance of a liquid film type evaporation/reboiler after optimization of flowingand heat transfer elements, and capable of providing theoretical foundation for design.

Description

technical field [0001] The invention relates to the field of thermal experiment equipment, in particular to a lifting film evaporation / reboiler test experiment system. Background technique [0002] The liquid film evaporator / reboiler has the advantages of short liquid residence time in the heat exchange tube, small pressure drop, large heat transfer coefficient, high steam utilization rate, not easy to scale, easy to clean, and a wide range of material and liquid treatment. It is widely used in the fields of chemical industry, oil refining, energy, aerospace, seawater desalination and refrigeration, especially in petrochemical industry, such as ethylene glycol, ethanolamine, acrylic fiber, polyester and other chemical fibers, chlor-alkali and other production equipment. . [0003] However, the current experimental devices are all experimental devices for single research on rising film or falling film, and it is impossible to combine the rising and falling films to conduct c...

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Problems solved by technology

[0003] However, the current experimental devices are all experimental devices for single research on rising film or falling film, and it is impossible to combine the rising and falling films to conduct comparative research at the same time. Setting up multiple test benches with different functions not only occupies a large area, but also requires a large investment, which is a waste of time. There are a lot of resources, and the test performance of different test benches directly affects the accuracy and reliability of the test results; in actual industrial production, the flow range, physical properties of working fluid solution, evaporation, etc. are quite different under different working conditions. The single pipeline of the existing experimental device is limited by the scope of application of the flowmeter and other conditions, and it is difficult to accurately simulate the operation of various working conditions; the design of the liquid distribution device under different working fluids and flow rates affects the effect of falling film evaporation There is a direct impact. In the existing experimental device, it is impossible to switch between different types of liquid distributors

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