Cold box exposed cooling-free construction method of large air separation device

A technology of air separation and construction method, which is applied in the direction of cold treatment separation, refrigeration and liquefaction, liquefaction, etc. It can solve the problems of long start-up time, high cost, time-consuming and laborious, etc., and achieve the effect of saving start-up costs, ensuring construction quality and shortening the construction period

Active Publication Date: 2018-05-04
CHINA NAT CHEM ENG THIRD CONSTR
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Problems solved by technology

This kind of driving method is time-consuming and labo

Method used

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Embodiment Construction

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0029] The 102000Nm3 / h air separation unit cold box free cold construction method includes the following construction content: In the prefabricated factory building of 15*60 meters, the prefabrication area, raw material storage area, semi-finished product storage area and pickling area are planned. After stainless steel materials arrive at the site, they are directly unloaded in the warehouse for classified discharge. Large pipes are classified and discharged on the ground, small pipes are classified and put on shelves, and pipe fittings are put on shelves and door locks are installed. Lay 3mm rubber sheets on the ground of the prefabricated area. Before the pipeline construction, th...

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Abstract

The invention discloses a cold box exposed cooling-free construction method of a large air separation device. The cold box exposed cooling-free construction method of the large air separation device comprises standard prefabricated workshop building, material stacking, modular pipeline prefabricating, mechanized hoisting, tracking type welding installation and overall checking and examining. Tracking type welding installation comprises pre-welding examining, end cap controlling during welding, pipeline checking after welding and 3A branched pipe connection examining of a pipeline. By means ofthe cold box exposed cooling-free construction method, the construction quality can be well guaranteed through strict process control, the investment of workers can be effectively reduced, the construction progress is accelerated, the construction period is shortened, the one-time turning process is reduced, turning of a cold box can be carried out after a unit is debugged to be qualified, it doesnot need to stop turning to wait pearlife loading, and after the whole debugging time is shortened, the turning expenditure can be effectively saved.

Description

technical field [0001] The invention relates to the construction field of a cold box of a large air separation device, in particular to a bare cold construction method for a cold box of a large air separation device. Background technique [0002] Large-scale air separation equipment is the key equipment widely used in metallurgy, petrochemical, coal chemical and other industries. Gases such as oxygen, nitrogen and argon are supplied to the production process. "Bare cooling" is a key step in the construction of an air separation plant. It means that after the system pipelines, valves and on-site air separation equipment are all installed and heated and purged, the cold box is not filled with insulation materials and then started to freeze. "Naked cooling" is a low-temperature assessment of the air separation equipment, the purpose of which is to check the installation quality of the air separation equipment, check whether there are leaks in the pipe welds and flange connect...

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Application Information

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IPC IPC(8): F25J3/04
CPCF25J3/04F25J3/0489F25J2290/42
Inventor 徐建李文蔚吴成涛
Owner CHINA NAT CHEM ENG THIRD CONSTR
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