Device for preparing liquid oxygen by utilizing low-temperature liquid nitrogen
A low-temperature liquid nitrogen and liquid oxygen technology, applied in the field of liquid gas, can solve problems such as waste, and achieve the effects of convenient operation, simple equipment, and high market returns
Pending Publication Date: 2019-02-01
浙江海畅气体股份有限公司
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Problems solved by technology
The evaporated low-temperature gas is discharged into the atmosphere, and the discharged gas is a low-temperature gas that is close to saturation, causing a lot of waste
Method used
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[0018] Below in conjunction with accompanying drawing, the present invention will be further described with specific embodiment, see figure 1 :
[0019] A device for preparing liquid oxygen by using low-temperature liquid nitrogen, the device includes a liquid oxygen storage tank 1, a liquid nitrogen storage tank 2 and a heat exchanger 3, the top of the liquid oxygen storage tank 1 is provided with an oxygen recovery pipe 4, the The bottom of the liquid nitrogen storage tank 2 is provided with a liquid nitrogen output pipe 5, the oxygen recovery pipe 4 and the liquid nitrogen output pipe 5 pass through the heat exchanger 3, the oxygen and the liquid nitrogen perform heat exchange, after the exchange, the oxygen is condensed into liquid oxygen, and the liquid nitrogen Nitrogen is reheated into nitrogen, and after passing through the heat exchanger 3, the oxygen recovery pipe 4 is connected to the liquid oxygen tanker, and the liquid nitrogen output pipe 5 is connected to the fr...
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The invention belongs to the technical field of liquid gas, and particularly relates to a device for preparing liquid oxygen by utilizing low-temperature liquid nitrogen. The device comprises a liquidoxygen storage tank, a liquid nitrogen storage tank and a heat exchanger, wherein the top of the liquid oxygen storage tank is provided with an oxygen recovery pipe, a liquid nitrogen output pipe isarranged at the bottom of the liquid nitrogen storage tank, the oxygen recovery pipe and the liquid nitrogen output pipe penetrate through the heat exchanger, oxygen and the liquid nitrogen are subjected to heat exchange, the oxygen after heat exchange is condensed into the liquid oxygen, the liquid nitrogen is reheated to be nitrogen, the oxygen recovery pipe penetrates through the heat exchangerto be connected with a liquid oxygen tank truck, and the liquid nitrogen output pipe is connected with a fractionating tower. The device for preparing the liquid oxygen by utilizing the low-temperature liquid nitrogen is used for recovering gas lost and evaporated due to heat insulation in the liquid oxygen storage tank, and has remarkable economic benefits.
Description
technical field [0001] The invention belongs to the technical field of liquid gas, and in particular relates to a device for preparing liquid oxygen by using low-temperature liquid nitrogen. Background technique [0002] The all-liquid air separation plant uses air as the raw material, turns the air into a liquid state through the method of compression cycle deep freezing, and then gradually separates it from the liquid air through rectification to produce liquid products such as liquid oxygen and liquid nitrogen. [0003] The liquid oxygen product produced by the all-liquid air separation equipment enters the storage tank system. Due to the loss of heat insulation in the storage tank system, the liquid oxygen in the tank evaporates into oxygen, which continuously increases the pressure in the tank, so it needs to discharge about 100Nm continuously 3 / hour of gas, the pressure in the storage tank can be normal. The evaporated low-temperature gas is all discharged into the ...
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IPC IPC(8): F25J3/04F25J5/00
CPCF25J3/04084F25J3/0409F25J5/00F25J1/0017F25J1/0221F25J2210/42F25J2210/90F25J2260/42
Inventor 陶宏伟林定标王培正陈辉
Owner 浙江海畅气体股份有限公司