Basic requirements for cryogenic liquid storage tanks

The gas supply modes of cryogenic liquid storage tanks are mainly high-pressure gas cylinder filling, cryogenic insulated gas cylinder sub-packaging, pipe network centralized gas supply, and cryogenic liquid spraying liquid supply. High-pressure gas cylinder filling: The cryogenic liquid storage tank is used as the gas supply source for high-pressure gas cylinder filling. It is suitable for the needs of many scattered and scattered gas users, and it must be standardized by professional production filling units. According to the requirements of the current national administrative license, the filling unit must hold a hazardous chemical designated production (storage) approval, safety production license and gas cylinder filling license, that is, "one book and two certificates" before high-pressure gas cylinder filling Outfit.

At the liquid outlet of the cryogenic storage tank, a cryogenic liquid pump and a high-pressure gasifier are arranged, and a high-pressure filling system is used to fill the high-pressure gas into a special gas cylinder. In the process of filling gas cylinders, a cryogenic and overpressure automatic shutdown protection system for the pipeline must be installed.Sub-packing of cryogenic insulated gas cylinders: From the liquid outlet of the cryogenic liquid storage tank, with the help of the storage pressure in the tank, the cryogenic liquid is directly packed into special small containers such as cryogenic insulated gas cylinders, which can be used by relatively independent and larger users.

When the cryogenic insulated gas cylinder is repacked, if the gas cylinder is provided with a vent valve, the vent valve should be opened to vent. When packing, the operator should pay attention to standing on the side, and the liquid outlet or vent should not stay for a long time. Centralized gas supply in the pipe network: the liquid outlet of the cryogenic liquid storage tank is connected with the cryogenic liquid low-pressure gasifier and the terminal pipeline adjustment system, followed by the gas use pipe network, which can be centrally supplied to larger areas or more users. According to the gas demand of the pipeline network, after determining the gas usage pressure, adjust the boost pressure to set the working pressure through the terminal pipeline adjustment system, and output the use gas at an automatic constant pressure to meet the regional centralized gas demand. cryogenic liquid spray supply: Use cryogenic liquid storage tanks to directly supply cryogenic liquid (liquid nitrogen is the common medium) to external objects through cryogenic pipelines. It is used for cryogenic processing techniques (such as cryogenic crushing and quick-freezing food).

The cryogenic liquid storage tank is matched with the cryogenic liquid spray system, and the distance between the two should be shortened as much as possible to reduce the length of the cryogenic pipeline and reduce the loss of cryogenic cooling capacity.