The LNG storage tank is a double-walled structure, consisting of the inner tank, outer tank, internal and external supports, insulating layer, pressure safety system, vacuum pump, pipeline system, etc. All vacuum-insulated structures rely on vacuum. Due to the high degassing rate and suction resistance of the insulating space materials, and the inability to use high baking temperatures for sealing materials that degas slowly, suction is difficult. To achieve the required vacuum level within the design-specified suction time, in addition to the vacuum pump and suction process, it also depends on the flow area of the annular suction pipes. To ensure a high vacuum level and improve the suction rate, a vacuum pump is installed at both ends of the equipment. One vacuum pump consists of three suction pipes, placed in the lower part of the annular space and leading out from the bottom. The other vacuum pump also consists of three suction pipes, but placed in the upper part of the annular space and leading out from the top. The two groups of suction pipes intersect and overlap along the length of the tank. By increasing the flow area of the suction pipes and using various auxiliary methods such as heating and nitrogen displacement, the vacuum time for the annular insulating space of 100 m3 is reduced to one-third of the conventional structure.
Low-temperature storage tanks are primarily used in the industrial gas sector, with a wide range of applications across various industries. These include steel mills, chemical processing, oil, food, and aerospace, all of which require gases. Industrially, gases like oxygen, nitrogen, and argon, which are in high demand, are separated from air using air separation equipment. The air is compressed and liquefied, then separated based on the different boiling points of oxygen, nitrogen, and argon, before being stored in low-temperature storage vessels.
Liquefied Natural GasThe tank features a long service life, compact structure, minimal land occupation, centralized control, easy operation, and maintenance. It is a double-layer fixed vacuum powder insulation low-temperature storage tank. The inner shell is made of stainless steel.,Outer case material:Q235BOr16MnRThe liquid oxygen tank surface is coated with corrosion-resistant materials using shot blasting, sweeping, and spraying techniques, while a two-component rapid curing liquid paint is also employed.
Liquefied Natural Gas (LNG) storage tanks are composed of the tank body, instruments, pipelines, valves, etc. These tanks utilize both upper and lower liquid inlet methods, allowing for self-selection based on actual conditions.
The inner tank of the Liquefied Natural Gas (LNG) storage tank is equipped with a safety system device featuring dual safety valves. Under normal operation, one set is in service and the other in standby. If the working safety valve trips, the manual pressure relief valve is immediately opened to release pressure to the highest working pressure of the tank, while the safety device is swiftly switched to the standby system via the manual handle, effectively ensuring the tank's safety. This safety system device consists of safety valves, explosion-proof devices, vent valves, and three-way ball valves, not only ensuring pipeline welding quality but also featuring excellent fire and static electricity prevention structures. Additionally, the safety relief openings on the housing are fully guaranteed to ensure the overall safety and reliability of the equipment. The low-temperature pipeline is centrally extracted for operation and control, and the extraction outlet is designed with a Duralumin structure to meet low-temperature requirements and reduce stress caused by thermal expansion and contraction in the pipeline, ensuring the tank's safety. The vacuum valve is sealed with three "O" rings, effectively ensuring the reliability of the sandwich seal, and is made of full stainless steel with a compact size. The top of the LNG storage tank features a research and development suspended structure for easy transportation, lifting, and installation. The unique process manhole design ensures the cleanliness inside the inner tank when it is sealed. Vacuum isolation valves and combined vacuum gauges are used on the LNG storage tank for measuring and maintaining the vacuum degree of the tank's sandwich, extending the tank's service life and improving its quality. The LNG storage tank is equipped with a level gauge and pressure gauge for local display of liquid level and pressure.
