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Thermal-state starting method of air separation equipment

A technology of air separation and thermal state, applied in lighting and heating equipment, liquefaction, solidification, etc., can solve the problems that have not been written and reported, achieve obvious energy saving and production protection effects, increase production and equipment operation rate, The effect of significant economic benefits

Inactive Publication Date: 2010-03-31
ANGANG STEEL CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there are no written records and data reports to solve the above problems

Method used

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Embodiment Construction

[0018] Below is 35000m 3 / h air separation plant as an example, the present invention will be further described.

[0019] When 35000m 3 / h After the air separation equipment is heated, adjust the pressure of the upper rectification column according to the three processes of cooling, liquid accumulation and purification of the air separation equipment, and increase the high-pressure air volume during the cooling and liquid accumulation stages. Adjust the opening and opening speed of the pressure regulating valve of the rectification tower under the temperature of the contaminated nitrogen in the cooler, send the liquid argon to the main heat exchanger to recover the cooling capacity of the liquid argon, start the liquid nitrogen and liquid oxygen process pumps in advance, and perform purification and increase in advance A series of comprehensive technical measures such as the evaporation of liquid air in the crude argon tower increase the cooling capacity, speed up the cooling...

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Abstract

The invention relates to a thermal-state starting method of air separation equipment; and the technical scheme of the method is achieved by the following steps: according to the process which is carried out by the air separation equipment , adjusting the pressure of an upper rectifying column and increasing high pressure air quantity; according to the temperature of waste nitrogen from a subcooler, adjusting the opening degree and the opening speed of a pressure adjustment valve of a lower rectifying column; sending liquid argon out to a main heat exchanger to recycle the refrigeration of theliquid argon; starting liquid nitrogen and liquid oxygen process pumps in advance, and adjusting purification and increasing the evaporation capacity of liquid air of a primary argon tower in advance;increasing the refrigeration capacity and improving the cooling speed and liquid accumulation speed of the air separation equipment, thereby realizing the rapid starting in a thermal state. The method can shorten the starting time of the air separation equipment in a thermal state remarkably, not only can save electrical energy, but also can send products out significantly in advance of time. Bythe method, the product oxygen and nitrogen of 35000m<3> air separation equipment can be sent out 14 hours in advance, and the produce liquid argon can be sent out 11 hours in advance. The method hassignificant energy saving effect, remarkable economic benefits as well as wide promotion and application values.

Description

technical field [0001] The invention belongs to energy power equipment, in particular to a method for quickly starting air separation equipment in a hot state. Background technique [0002] An air separation plant or oxygen concentrator is a device that produces oxygen, nitrogen and argon. According to the regulations of equipment inspection and maintenance and the requirements of ensuring long-term use, the air separation equipment must be heated up every two years, and it will take a long time to restart in a hot state after the large heating, so the product The sending time will also be extended accordingly. For 35000m 3 For / h air separation equipment, the sending time of the product oxygen and nitrogen is usually 32 hours, and the sending time of the product liquid argon is as high as 56 hours or more, which not only reduces the output and equipment operation rate of the oxygen plant, but also reduces the economic benefits; and directly It affects the production need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J3/04
CPCF25J3/04072F25J3/04084F25J3/0409F25J3/04818
Inventor 何玉君黄海涛牛彤
Owner ANGANG STEEL CO LTD
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