Air separation high-pressure plate type heat exchange system and purging method

Abstract

The invention discloses an air separation high-pressure plate type heat exchange system and a purging method. The purging method includes the following steps that high-pressure plate type heat exchanger air channel draining and air channel positive purging reheating are conducted; high-pressure plate type heat exchanger liquid oxygen channel temporary fake piece connection is conducted; high-pressure plate type heat exchanger reheating is conducted; high-pressure plate type heat exchanger liquid oxygen channel blasting purging is conducted; and pipeline and flange resetting is conducted. The purging method is suitable for running of an independent set of air separation system or parallel running of multiple sets of air separation systems, and the problem of continuous oxygen load reducingcaused by the conditions that a high-pressure plate type heat exchanger is blocked and the heat exchange effect of the heat exchanger becomes poor is solved effectively. The air separation high-pressure plate type heat exchange system comprises the high-pressure plate type heat exchanger, and the high-pressure plate type heat exchanger comprises an air channel, a nitrogen channel and an oxygen channel.

Description

technical field [0001] The invention relates to an air separation high-pressure plate heat exchange system and a purging method, belonging to the technical field of air separation heat exchanger operation methods. Background technique [0002] A heat exchanger is an energy-saving device that transfers heat between materials between two or more fluids at different temperatures. It transfers heat from a fluid with a higher temperature to a fluid with a lower temperature, so that the fluid temperature reaches the process The specified index is to meet the needs of the process conditions, and it is also one of the main equipment to improve energy utilization. The plate heat exchanger is composed of a series of metal sheets with a certain corrugated shape. [0003] If the air separation high-pressure plate heat exchanger runs for a long time for heat exchange, there will be blockage caused by substances such as ice blockage or pearlescent sand residue, resulting in poor heat exc...

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Problems solved by technology

[0004] In order to solve the deficiencies in the prior art, the present invention discloses an air separation high-pressure plate heat exchange system and a purging method, which is suitable for a single set of air separation operation or multiple sets of air separation parallel operation, and effectively solves the problem of high-pressure plate heat exchangers. Oxygen load continues to drop due to blockage, poor heat transfer effect of the heat exchanger, etc.

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