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Low temp air fractionation system

A low-temperature air separation and equipment technology, used in cold treatment separation, lighting and heating equipment, compressors, etc., can solve problems such as being unable to be transported, and achieve the effect of easy transportation and reduced size

Inactive Publication Date: 2006-02-01
LINDE AG
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  • Description
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  • Application Information

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Problems solved by technology

[0005] However, such larger cryogenic air separation plants cannot be transported and must therefore be assembled at the point of use
Even if the plant is divided into a rectification module in which the oxygen-nitrogen separation is mainly performed and an argon module including a crude argon column with appendages, the two cold boxes are usually so large that they cannot be transported
Therefore, the manufacturing cannot be done in the production plant

Method used

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Embodiment Construction

[0031] figure 1 The air separation plant shown in has a two-column refiner with a main condenser 1, a pressure column 2 and a low pressure column 3 for obtaining nitrogen at the top of the low pressure column 3 and collecting sump from the low pressure column 3 get oxygen. The double column with the counterflow cooler 4 and further cold components, not shown, such as coolant pumps, are arranged in cold boxes, the arrangement of which will be explained in more detail with reference to FIGS. 2 to 6 .

[0032] The argon rectification unit consists of two partial columns 6, 7 forming the crude argon column, a pure argon column 8 and corresponding top condensers 9, 10. The first subcolumn 6 is connected in the usual manner to the low-pressure column 3 via a line 17 via which a fraction comprising mainly oxygen and argon can be fed into the first subcolumn 6 . The reflux line 18 is used to return the residual liquid collected in the collection sump of the first partial column 6 to...

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Abstract

The invention relates to a low temperature air fractionation system comprising several modules consisting of at least one heat exchange unit, a pressure column and a low pressure column, in addition to the accessories belonging to the respective modules and at least two cold-boxes, wherein the module and / or the accessories are arranged. The invention is characterized in that at least one of the cold-boxes is embodied in the form of a main box and at least one of the cold-boxes is embodied in the form of a secondary box. The secondary box contains at least one module and the accessories of the module disposed in the secondary box are mainly located in the main box.

Description

technical field [0001] The invention relates to a cryogenic air separation plant having a plurality of modules comprising at least one heat exchange unit, a pressure column and a low pressure column, and having appendages and at least two cold boxes subordinate to the respective modules , modules and / or appendages are housed in these cold boxes. Background technique [0002] To obtain argon by cryogenic rectification, a fraction mainly comprising oxygen, nitrogen and argon is taken from the middle of the low-pressure column of the double-column arrangement and fed to a crude argon column. Next, the argon is liberated from the oxygen in the crude argon column and is withdrawn as an oxygen-free product at the top of the crude argon column. The crude argon column is usually positioned such that its base is approximately at the level of the argon outlet of the low-pressure column. [0003] In some cases, however, the crude argon column has such a great height that it is comple...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J3/04F25B9/00
CPCF25J2235/58Y10S62/905Y10S62/911F25J3/04678F25J3/04412F25J2245/50F25J3/04878F25J3/0489F25J3/04703F25J3/04727F25J3/04872F25J3/04
Inventor 斯特凡·默勒沃尔夫冈·巴德尔
Owner LINDE AG
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