Pre-cooling vaporization prying type device

Abstract

The invention discloses a precooling vaporization prying type device, and relates to the technical field of LNG pipeline precooling. The precooling vaporization prying type device comprises two vaporizer inlet gathering pipes, a signal line gathering device and a liquid nitrogen truck, the structures of the two vaporizer inlet gathering pipes are the same, and a block valve is arranged between the two vaporizer inlet gathering pipes. According to the precooling vaporization prying type device, low-temperature nitrogen gasified by the multiple vaporizers enters the vaporizer outlet gathering pipe and is gathered into the gas-liquid separation tank through the vaporizer outlet gathering pipe to be separated, liquid nitrogen sinks to the bottom of the tank to be treated, and the low-temperature nitrogen gas upwards enters the precooled device to be treated; a plurality of low-temperature gases with different temperatures are mixed to reach the desired pre-cooling temperature, then the pre-cooled device is pre-cooled, the process is controlled by a control system, the pre-cooled device is gradually cooled according to requirements, the damage of the pre-cooled device caused by sudden cooling of the pre-cooled device is avoided, the damage of the device is avoided, and the pre-cooling purpose is achieved.

Description

technical field [0001] The invention relates to the technical field of LNG pipeline precooling, in particular to a precooling vaporization skid device. Background technique [0002] The LNG station has only started to be constructed and gradually developed in recent years, from receiving LNG to vaporizing it into gaseous natural gas and sending it to users. There are many technologies that need breakthroughs. The pre-cooling work before production is one of the technologies. The pre-cooling technology is very demanding, because thermal expansion and contraction are different from the temperature resistance of the device, and a little carelessness will result in expensive equipment. damage. Therefore, the requirements for the equipment used for pre-cooling are very high. [0003] As the demand for natural gas energy gradually increases, a large amount of liquefied natural gas (LNG) begins to be imported from abroad, and the number of liquefied natural gas (LNG) stations gra...

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Problems solved by technology

[0003] As the demand for natural gas energy gradually increases, a large amount of liquefied natural gas (LNG) begins to be imported from abroad, and the number of liquefied natural gas (LNG) stations gradually increases, which involves a pre-cooling of some devices such as pipelines and tanks in the newly built LNG receiving station At present, these pre-cooling devices are lacking in the market, and when the pre-cooling device is working, it cannot gradually cool down the pre-cooled device and the pipeline, which will easily cause the sudden cooling of the pipeline and the pre-cooled device, resulting in Damage to pipelines and pre-cooling devices, resulting in damage to liquid natural gas (LNG) stations

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