Forced LNG (Liquefied Natural Gas) evaporator for ships

Abstract

The invention discloses a forced LNG (Liquefied Natural Gas) evaporator for ships, and belongs to the field of gasification equipment of natural gas. The forced LNG evaporator comprises a tank body of a gasification tank, a group of U-shaped radiating pipes, a group of U-shaped gasification pipes, a radiating-medium guide connector and a gas-liquid guide connector, wherein a left tank-body end cap is arranged at the left end of the tank body, a left tank-body end-cap connector is fixed on the left tank-body end cap, and a left end-cap connector sealing plate is fixed to the left end opening of the left tank-body end-cap connector; a right tank-body end cap is arranged at the right end of the tank body, a right tank-body end-cap connector is fixed to the right tank-body end cap, and a right end-cap connector sealing plate is fixed to the right end opening of the right tank-body end-cap connector; a middle medium inlet opening is formed in the upper part of the tank body of the gasification tank, and a middle medium outlet opening is formed in the bottom of the tank body of the gasification tank; the U-shaped radiating pipes are arranged in the cavity of the tank body; the U-shaped gasification pipes are arranged in the cavity of the tank body; the right end of the radiating-medium guide connector is fixed to one side of the left end-cap connector sealing plate, a radiating-medium guide connector cavity separation plate is arranged in the cavity of the radiating-medium guide connector, a radiating-medium inlet opening is fixed to the upper part of the radiating-medium guide connector, and a radiating-medium outlet opening is fixed to the lower part of the radiating-medium guide connector; a gas-liquid guide separation plate is arranged in the cavity of the gas-liquid guide connector, an LNG inlet opening is fixed to the lower part of the gas-liquid guide connector, and an LNG outlet opening is fixed to the upper part of the gas-liquid guide connector. The forced LNG evaporator is safe, and the radiation efficiency and gasification efficiency are improved; the forced LNG evaporator is convenient to process.

Description

technical field [0001] The invention belongs to the technical field of natural gas gasification devices, and in particular relates to a marine LNG forced evaporator. Background technique [0002] The aforementioned LNG is the abbreviation of "Liquid Natural Gas" in English, and the Chinese name is "Liquefied Natural Gas". other ingredients. LNG is condensed into a liquid by cooling gaseous natural gas to about -163°C under normal pressure. Since its volume is about one-sixth of that of gaseous natural gas, it can significantly save storage and transportation space and cost, and is conducive to long-distance transportation and storage. [0003] The energy source of the marine engine in the prior art still generally uses diesel oil, and when diesel oil burns, it will produce waste gases such as carbon dioxide and other harmful emissions to the environment, and a little carelessness of diesel oil in the process of using the ship will cause floating oil in the waters. pollut...

AI Technical Summary

Problems solved by technology

[0008] Although the above-mentioned CN203655471U can objectively fulfill the technical effect recorded in paragraph 0011 of its description, the gasification device of this patent has the following shortcomings: First, because it directly uses hot water as the evaporative heat exchange medium to flow through the evaporator tube (patent It is called the gasification of LNG in the finned tube), so on the one hand, it is not conducive to energy saving, and on the other hand, it is unsafe, because the temperature of LNG is usually around -163 ° C, so when directly using hot water to exchange heat outside the evaporation tube, It is easy to damage the evaporation tube due to thermal expansion, resulting in the scrapping of the entire gasification device and even undesired safety accidents; Integrated effect, for example, in the second line of paragraph 0017 of the patent specification, it is mentioned to use 2 to 3 (the patent is 4), so the gasification efficiency and gasification capacity of LNG are relatively low; third, due to the gasification The bulk of the device is not conducive to saving installation space

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