Water circulation temperature control device and system for heating liquefied natural gas

Abstract

The invention provides a water circulation temperature control device and system for heating liquefied natural gas. The water circulation temperature control device comprises a liquefied LNG storage tank, a low-temperature immersed pump, a vaporizer, a heat exchanger and a temperature control device body which are connected in a closed mode, wherein the outlet end of the liquefied LNG storage tankis connected with the inlet end of the low-temperature immersed pump through an LNG low-temperature pipeline a; the outlet end of the low-temperature immersed pump is connected with the inlet end ofthe heat exchanger through an LNG low-temperature pipeline B and the vaporizer; the outlet end of the heat exchanger is connected with upper-end equipment through a CNG pipeline; and the temperature control device body is connected with a water medium pipeline of the heat exchanger through a heating medium return port A and a heating medium outlet B. According to the water circulation temperaturecontrol device and system, the liquefied natural gas is gasified through the heat exchanger and then injected into a main machine; and heat of water is transmitted to the liquefied natural gas in theheat exchanger, the water is continuously heated and circulated and stabilized at a constant temperature, thus, the natural gas entering the main machine is at a constant pressure and a constant temperature, and the effects that the system is stable and reliable, the device is simple, and the cost is reduced are achieved.

Description

technical field [0001] The invention relates to a water circulation temperature control technology in the field of automation technology, in particular to a liquid natural gas heating water circulation temperature control device and system. Background technique [0002] With the development of the international shipping industry and ocean-going shipping, exhaust emissions from marine engines fueled by diesel fuel have become a major source of pollution in the ocean, especially in port areas. The pollution of sulfur oxides and nitrogen oxides in marine diesel engine exhaust to the atmospheric environment has aroused widespread concern in the international community. Therefore, power equipment fueled by clean energy natural gas began to step onto the stage of history. The fuel used by dual-fuel marine engines is gaseous natural gas with stable pressure, stable temperature and high cleanliness. In order to allow the ship to sail long distances, enough liquid natural gas needs...

AI Technical Summary

Problems solved by technology

However, the equipment is still very large and needs to occupy a lot of space, and the heat exchange efficiency is different in different environments

Unable to meet the requirements for space and heat exchange efficiency on board

Another solution is to add a direct electric heater to the pipeline behind a small gasifier to ensure complete gasification and heat the natural gas. , the risk factor is too high, and the flowing natural gas may continuously impact the electric heating tube, which is very dangerous

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