Efficient heat exchange tube for LNG vaporizer and open rack vaporizer

Abstract

The invention discloses an efficient heat exchange tube for an LNG vaporizer and an open rack vaporizer. The efficient heat exchange tube is characterized by comprising a heating section, a vaporization section and an overheating section, wherein the tube inner wall of the heating section is of a plum blossom-shaped structure; the tube inner wall of the vaporization section is of a smooth surface or slot structure; a vaporization section inner tube which is of a thread or corrugated tube structure is mounted inside the vaporization section tube with the smooth surface or slot structure in a sleeving manner; a vaporization section re-inner tube which is of a twisted tube structure is mounted inside the vaporization section inner tube in a sleeving manner; the tube inner wall of the overheating section is of a smooth surface or slot structure; and an overheating section inner tube which is of a corrugated tube or bellows structure is mounted inside the overheating section tube with the smooth surface or slot structure. According to the efficient heat exchange tube, the vaporization section adopts a three-layer sleeve structure, the overheating section adopts a double-layer sleeve structure, and a multi-layer structure of the inner sleeves and annular clearances is formed inside the heat exchange tube, so that the thermal conduction efficiency is improved; and besides, the manufacturing and mounting are simple, and the manufacturing cost of the inner sleeves of the heat exchange tube of the open rack vaporizer is reduced.

Description

technical field [0001] The invention relates to a gasification device for liquefied natural gas (LNG), in particular to a heat exchange tube of an open-frame gasifier and an open-frame gasifier using the heat exchange tube. Background technique [0002] Gaseous natural gas (NG) is transformed into liquid natural gas (LNG) after being cooled to -162°C, and its volume is reduced to 1 / 620 at the same time, which is convenient for transportation and storage, but it cannot be used directly. Before using liquefied natural gas, it must be converted into gaseous natural gas (NG) by the LNG gasifier at the LNG receiving station before it can be used by users. With the rapid development of the number and scale of construction of LNG receiving stations in China, the market demand for LNG vaporizers is also expanding. [0003] LNG gasifier is the key equipment in the whole LNG supply process. Most of the LNG receiving stations are built by the sea, and seawater has become the most eco...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to design a new type of high-efficiency heat exchange tube and a new type of high-efficiency heat exchange tube equipped with such a high-efficiency heat exchange tube for the above-mentioned existing liquefied natural gas gasification heat tube. The open-frame gasifier avoids the deformation and displacement of the internal parts of the heat exchange tube, which affects the heat transfer efficiency and the stable operation of the equipment.

Images