U-shaped-pipe-bundle warm-water-circulating large-flow natural gas recuperator

Abstract

The invention provides a U-shaped-pipe-bundle warm-water-circulating large-flow natural gas recuperator which comprises a first heat exchanger and a second heat exchanger. The first heat exchanger and the second heat exchanger are placed in an overlapped manner, one ends of the first heat exchanger and the second heat exchanger are connected through an elbow, a circulating water inlet, a circulating water outlet, and a non-condensable gas emptying port and an emptying port are arranged on each of the first heat exchanger and the second heat exchanger; the circulating water outlet of the first heat exchanger is connected with the circulating water inlet of the second heat exchanger; a liquefied natural gas inlet is arranged at the other end of the first heat exchanger, and a gaseous natural gas outlet is arranged at the other end of the second heat exchanger. The U-shaped-pipe-bundle warm-water-circulating large-flow natural gas recuperator has the advantages that the recuperator is free of influence of heat-induced expansion and cold-induced contraction of media large in temperature difference, and is resistant to low temperature and corrosion; hot and cold media form reverse flow, and hot fluid is forced to circulate; a baffle plate is arranged, so that heat transfer effect is improved, heat exchange area is reduced; an overlapped structure is adopted, so that heat exchange area can be guaranteed, heat exchange requirements can be met, occupied area can be saved, space can be utilized effectively, and the like.

Description

technical field [0001] The invention belongs to the technical field of heat exchanger equipment, in particular to a U-shaped tube bundle warm water circulation large-flow natural gas reheater. Background technique [0002] In the existing technology, natural gas is widely used as a clean energy, but most areas are far away from the gas supply point, and pipeline gas is difficult to reach. Natural gas can be cooled at the gas-liquid volume ratio of 625:1 in the gas source production area Liquefied into liquefied natural gas—LNG, transported to the gas point by low-temperature tanker, gasified by gasifier, decompressed and odorized, and then enters the rear gas pipeline network. It is suitable for industrial and civil users. LNG gasifiers are generally Air-temperature gasification saves energy, but the air-temperature gasifier does not work if the ambient temperature is lower than 0°C, so a forced heat exchange gasifier is required. [0003] The following difficulties need to...

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Problems solved by technology

3. The heat exchange area required for natural gas gasification is large, and the number of heat exchange tubes is small, resulting in an increase in the length of the heat exchanger tubes and an excessively large equipment footprint

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