Heating device and heating method of oxygen generating expander

An expander, carbon dioxide technology, used in refrigeration and liquefaction, lighting and heating equipment, liquefaction and other directions, can solve the problems of reduced nitrogen production, reduced operating efficiency, and high cost, and achieve the effect of operating costs.

Active Publication Date: 2017-12-26
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2) Due to the influence of airflow carrying effect and molecular sieve adsorption efficiency, the operating efficiency of the expander will decrease after a long period of operation. In order to prolong its service life, it must be heated and thawed
But there are other problems: 1) Nitrogen is a product of the oxygen generator, and the cost is higher than that of air; 2) Nitrogen is mainly supplied to users of the main operation line (such as cold rolling and hot rolling). When used for heating the expander, the pipe network The total amount of nitrogen in the medium decreases, which puts pressure on the balance of the system; 3) When the oxygen generator or nitrogen compressor malfunctions and trips or other unplanned shutdowns, the nitrogen output decreases and needs to be supplemented by liquid nitrogen evaporation. At this time, the operating cost will be greatly reduced. rise

Method used

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  • Heating device and heating method of oxygen generating expander
  • Heating device and heating method of oxygen generating expander

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Embodiment Construction

[0024] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] The purpose of the present invention is to provide a heating device and a heating and operation method for an oxygen generator expander, which can realize low-cost, on-demand, and timely heating of the expander without being affected by the shutdown of the oxygen generator or the nitrogen pipe. Net system balance.

[0026] According to one aspect of the present invention, a heating device for an oxygen generating expander is provided. Including: heating gas pipeline, analysis control module.

[0027] see figure 1 , the heating device of the oxygen generating expander of the present invention includes a heating gas pipeline system and an analysis control module. Wherein, the heating gas pipeline system includes an air compressor 1 , a precooling system 2 , a molecular sieve system 3 , an air separation system 4 , an i...

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Abstract

The invention discloses a heating device and a heating method for an oxygen-making expander. The device comprises a heating gas pipeline system and an analyzing control module, wherein the heating gas pipeline system mainly comprises an air compressor, a pre-cooling system, a molecular sieve system, an air separating system, an instrument gas header pipe, a first expander, and a second expander; the analyzing control module mainly comprises a dew point analysis unit, a carbon dioxide analysis unit and an alarm control unit. The heating method mainly comprises the following steps: step1, starting the oxygen-making expander and adopting instrument gas as heating gas until the air separating system is normally put into operation, and gas products are generated; and step 2, after the air separating system is put into operation, adopting air as heating gas. According to the technical scheme disclosed by the invention, a raw material air heating gas source and an instrument gas heating gas source are combined and mixed, and corresponding heating gas is selected for different working conditions, so that heating is not limited by time and is not affected by shut-down of the air compressor, and nitrogen gas pipe network balance is not affected.

Description

technical field [0001] The invention relates to an air separation process for oxygen production, and more specifically relates to a heating device and a heating method for an oxygen production expander. Background technique [0002] The basic process principle of the existing oxygen generators using cryogenic technology is to conduct deep cooling and rectification of air through steps such as compression, expansion, and heat exchange, and use the different boiling points of each component to separate oxygen, nitrogen, and argon. product. The main process equipment includes: air compressor, pre-cooling system, molecular sieve system, booster turbo expander (referred to as "expander"), and air separation system. Among them, the expander is an extremely important process equipment and the main force for the start-up, operation and normal production of the entire oxygen generator, and its cooling capacity accounts for 85% of the cooling capacity required by the entire air separ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J3/04
Inventor 王绿宇王勇马益
Owner BAOSHAN IRON & STEEL CO LTD
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