LNG regasification experiment system and experiment method

Abstract

The invention relates to an LNG regasification experiment system. The LNG regasification experiment system comprises an LNG circulation unit and a propane circulation unit, wherein the LNG circulationunit comprises an LNG liquid tank, a liquid outlet valve, a plunger type booster pump, a pressure stabilizing tank, a micro-channel vaporizer, a back pressure valve, an air temperature type reheater,an emptying pipe, a three-way valve I, a pressure reducing valve and a liquid storage tank; and the propane circulation unit comprises a propane liquid storage tank, a propane circulation pump, a three-way valve II, a floating coil type heat exchanger, an electric heater, a liquid inlet valve and a discharge valve. The invention further relates to an experiment method based on the experiment system. The experiment method comprises the following steps: system construction, propane cooling, LNG vaporization, flow control and LNG reheating. The LNG regasification experiment system and the experiment method have the advantages that the propane circulation unit is additionally arranged, so that direct heat exchange between propane and LNG fluid is avoided; and meanwhile, a large amount of latent heat is released by utilizing phase change heat exchange of the propane, so that the occurrence of an icing phenomenon in a heat exchange process of the micro-channel vaporizer is effectively reduced, and efficient operation of the micro-channel vaporizer is guaranteed.

Description

technical field [0001] The invention relates to an LNG regasification experimental system, and also relates to an experimental method of the above-mentioned experimental system. Background technique [0002] Cryogenic fluids generally refer to fluids with temperatures ranging from -40.15°C to -196.15°C. Generally, industrial gases such as LNG, liquid oxygen, liquid hydrogen, liquid nitrogen, and liquid carbon dioxide need to be stored and transported in liquid form, and then re-gasified at the terminal for use. For LNG regasification, since the volume of LNG is only 1 / 600 of the volume of natural gas (NG), in order to meet the requirements of storage and long-distance transportation, NG usually needs to be liquefied first and then vaporized for use. However, the critical temperature of LNG is -163°C, which may cause freezing of the heat exchange medium or incomplete vaporization during the vaporization process. [0003] The LNG fluid regasification system using medium temp...

AI Technical Summary

Problems solved by technology

Although the structure is simplified, when the hot water flows through the floating coil heat exchanger, it is easy to form scale in the coil and affect the heat exchange efficiency, and the scale in the coil is difficult to clean, which brings a lot of trouble to the later work. troubled

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