Energy-saving gas replacement method for low-temperature liquid tank car

A cryogenic liquid and tank car technology, which is applied in gas/liquid distribution and storage, pipeline systems, mechanical equipment, etc., and can solve problems such as complex operation processes

Inactive Publication Date: 2020-07-07
XINJIANG BAYI IRON & STEEL
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  • Energy-saving gas replacement method for low-temperature liquid tank car

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Embodiment Construction

[0008] An energy-saving replacement method for gas in a low-temperature liquid tank car, such as figure 1 As shown, the tank truck storage tank uses gas energy-saving to replace the operation method: 1. Move the installation position of the supercharger outlet valve "Tong-4" to the three-way safety valve "Tong-5" and the vent valve "Tong-1" pipeline 2. The first three steps are the same as the "1~3" replacement method in the prior art; 3. According to the type of low-temperature liquid medium to be filled, return the low-temperature oxygen and nitrogen to the inlet of the main heat exchanger of the air separation unit. , or the low-temperature process argon gas at the outlet of the crude argon tower is connected to the tank car through the filling hose, so that the corresponding low-temperature gas is filled into the storage tank through the top inlet (discharge) liquid valve "Tong-1", and the inlet of the supercharger is opened The valve "tong-3" and the vent valve "release-1...

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Abstract

The invention discloses an energy-saving gas replacement method for a low-temperature liquid tank car. The energy-saving gas replacement method for the low-temperature liquid tank car comprises the steps that 1, the installing position of a supercharger outlet valve 'way-4' is moved to a pipeline between a three-way safety valve 'way-5' and an emptying valve 'emptying-1'; the replacement method inthe first three steps is the same as that of the 1-3 steps in the prior art; 3, low-temperature oxygen and nitrogen flow back to an inlet of a main heat exchanger of an air separation unit, or low-temperature technology nitrogen at an outlet of a crude argon column is connected with the tank car through a filling hose, low-temperature gas is injected into a storing tank through a top liquid inletvalve 'way-1', a supercharger inlet valve 'way-3' and the emptying valve 'emptying-1' are opened to keep the micro-positive pressure in the storing tank, and the gas uniformly enters the top of the storing tank to replace a medium in the storing tank from top to bottom; 4, the gas content is detected on a 'branch-1' valve at a detection port of the storing tank, and replacement is completed whenthe gas content reaches the purity of a low-temperature liquid medium needing to be injected; and 5, when liquid argon and nitrogen replace liquid oxygen, replacement is conducted once through a smallamount of low-temperature liquid after gas replacement is completed.

Description

technical field [0001] The invention relates to an energy-saving gas replacement method for a low-temperature liquid tank car. Background technique [0002] The cryogenic liquid (liquid oxygen, liquid nitrogen, liquid argon) produced by the air separation unit is widely used in industrial and mining enterprises, metal processing, inspection and analysis, and gas purification; because the temperature of the cryogenic liquid is between -183°C and -196°C At the same time, the cryogenic liquid transported at the same time is a hazardous chemical, so the transport of cryogenic liquid needs to be carried out by a special cryogenic liquid tank car, which is composed of a transport vehicle and a cryogenic liquid storage tank; In actual transportation, different types of cryogenic liquids will be transported by the same tanker at different times, which requires replacement of the storage tanks of the tanker to achieve the purpose of transporting different types of cryogenic liquids. ...

Claims

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Application Information

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IPC IPC(8): F17D1/08F17D3/01
CPCF17D1/082F17D3/01
Inventor 樊新庆毛新玲朱艳才李刚
Owner XINJIANG BAYI IRON & STEEL
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