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A recovery device and recovery method technology, applied to the liquid nitrogen recovery device and the recovery field, can solve the problems of high vacuum pump price, vacuum pump damage, difficult maintenance, etc., and achieve the effect of saving procurement and equipment maintenance costs, reducing energy consumption and costs.
Inactive Publication Date: 2016-04-27
SHANGHAI QIYUAN AIR SEPARATION TECH DEV
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However, due to the high price of the vacuum pump and the difficulty of maintenanc
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[0030] Example one
[0031] Such as figure 1 As shown, a liquid nitrogen recovery device includes:
[0032] The first liquid nitrogen storage tank 1 is used to store liquid nitrogen;
[0033] The first transportation pipeline 2 is connected to the first liquid nitrogen storage tank 1 to transport the liquid nitrogen to the cryogenic working device 01;
[0034] The second transportation pipeline 3 is connected to the low temperature working device 01;
[0035] The second liquid nitrogen storage tank 4 is connected to the second transportation pipeline 3, and is used to store the liquid nitrogen delivered by the low-temperature working device 01 through the second transportation pipeline 3;
[0036] The third transportation pipeline 5 is respectively connected to the first liquid nitrogen storage tank 1 and the second liquid nitrogen storage tank 4, and is used to transport the liquid nitrogen in the second liquid nitrogen storage tank 4 to the first liquid nitrogen storage tank. Nitrogen...
Example Embodiment
[0042] Example two
[0043] According to the liquid nitrogen recovery device proposed in the above embodiment, this embodiment provides a liquid nitrogen recovery method.
[0044] Such as image 3 As shown, a liquid nitrogen recovery method includes the steps:
[0045] When the low-temperature working device 01 is working, the first liquid nitrogen storage tank 1 transfers the liquid nitrogen to the low-temperature working device 01 through the first transportation pipeline 2;
[0046] Turn on the first booster 11 to increase the air pressure of the low-temperature working device 01;
[0047] The liquid nitrogen in the low-temperature working device 01 is transferred to the second liquid nitrogen storage tank 4 through the second transportation pipeline 3;
[0048] After a period of time, close the first supercharger 11 and open the second supercharger 12 in the second liquid nitrogen storage tank 4;
[0049] When the air pressure in the second liquid nitrogen storage tank 4 is greater t...
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Abstract
The invention provides a liquid nitrogen recovering device and method. The device comprises a first liquid nitrogen storage tank, a first transportation pipeline, a second transportation pipeline, a second liquid nitrogen storage tank, a third transportation pipeline and a first pressurizer, wherein the first liquid nitrogen storage tank is used for storing liquid nitrogen; the first transportation pipeline is connected with the first liquid nitrogen storage tank and is used for transporting the liquid nitrogen to a low-temperature working device; the second transportation pipeline is connected with the low-temperature working device; the second liquid nitrogen storage tank is connected with the second transportation pipeline and is used for storing the liquid nitrogen transported by the low-temperature working device through the second transportation pipeline; the third transportation pipeline is respectively connected with the first liquid nitrogen storage tank and the second liquid nitrogen storage tank and is used for transporting the liquid nitrogen in the second liquid nitrogen storage tank to the first liquid nitrogen storage tank; and the first pressurizer is arranged in the low-temperature working device and is used for increasing the air pressure in the low-temperature working device. According to the liquid nitrogen recovering device, the first pressurizer is utilized while a vacuum pump is omitted, so that the purchasing cost of the vacuum pump and the maintenance expense of equipment are reduced, and the liquid nitrogen recovering device is more convenient and practical in actual application.
Description
technical field [0001] The invention relates to the field of nitrogen recovery devices, in particular to a liquid nitrogen recovery device and a recovery method. Background technique [0002] Liquid nitrogen is used as a low-temperature cold source in this device to create a low-temperature environment. Under normal circumstances, after liquid nitrogen is used, due to the complicated liquid nitrogen recovery process and high recovery costs, most of the liquid nitrogen is emptied. For the long-term venting of liquid nitrogen in the air separation unit that uses a large amount of liquid nitrogen, it is not only a serious waste of energy, but also will increase the operating cost of the device. The existing solution is to establish a liquid nitrogen circulation system and use a vacuum pump to form a pressure difference to ensure the circulation of liquid nitrogen in the entire system. However, due to the high price of the vacuum pump and the difficulty of maintenance, low-tem...
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Application Information
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