Space-insolated oxygen gas conveying system and method for pressure releasing and energy-saving by coal wind chest technology

A technology of gas cabinets and oxygen, which is applied in the pipeline system, gas/liquid distribution and storage, mechanical equipment, etc., and can solve the problems that cannot meet the peak regulation requirements of large-scale air separation systems, and the volume of gas storage bags and gas cabinets is small.

Inactive Publication Date: 2008-04-09
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional low-pressure storage bags and gas tanks have relatively small volumes and cannot meet the peak-shaving requirements o

Method used

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  • Space-insolated oxygen gas conveying system and method for pressure releasing and energy-saving by coal wind chest technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0030] The total oxygen output of the air separation unit of a large iron and steel company in my country is 230000Nm 3 / h, according to the statistics of the pressure data of 28 days of normal production, the maximum pressure is 2.56MPa, the minimum pressure is 1.73MPa, and the average pressure is 2.16MPa. According to pressure fluctuations, pipeline conditions, spherical tank volume, etc., it is calculated that it will take 70,000 m 3 The gas cabinet is used to adjust the fluctuation of the amount of oxygen used by the user, so as to stabilize the pressure of the pipe network and reduce the release of oxygen. Considering the problem of the minimum operating volume of the gas cabinet and special circumstances (such as the increase of oxygen users, etc.), the volume utilization coefficient of the dry cabinet is 0.9, the gas volume correction coefficient is 1.263, and the oxygen system is selected as 100,000 m 3 The gas cabinet is used as a gas storage device.

[0031] After ...

Embodiment example 2

[0033] The total oxygen output of the air separation unit of a medium-sized iron and steel company in my country is 63000Nm 3 / h, according to the statistics of the pressure data of 15 days of normal production, the maximum pressure is 3.06MPa, the minimum pressure is 1.75MPa, and the average pressure is 2.57MPa. According to pressure fluctuations, pipeline conditions, spherical tank volume, etc., it is calculated that 30,000 m 3 The gas cabinet is used to adjust the fluctuation of the amount of oxygen used by the user, so as to stabilize the pressure of the pipe network and reduce the release of oxygen. Considering the problem of the minimum operating volume of the gas cabinet and special circumstances (such as the increase of oxygen users, etc.), the volume utilization coefficient of the dry cabinet is 0.9, the gas volume correction coefficient is 1.263, and the oxygen system is selected as 50,000 m 3 The gas cabinet is used as a gas storage device.

[0034] After adding t...

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Abstract

The present invention discloses an air separation oxygen delivery system and method using the technology of coal gas cabinet for pressure decreasing and energy-saving, pertains to the technical field of energy-saving consumption-reduction novel technique for air separation field, and comprises an air separation device (1), a coal gas cabinet (12), an oxygen compressor (5), a spherical tank (6), and a booster (16). The coal gas cabinet (12) is arranged in front of the oxygen compressor (5). The lowest using pressure of the coal gas cabinet is guaranteed by the booster (16) arranged before the air enters the coal gas cabinet. A pathway which overpasses the coal gas cabinet is arranged between a check valve (4) positioned at the back of the air separation device (1) and the oxygen compressor (5), and the operation of the coal gas cabinet under the condition of maintenance is guaranteed for the pathway is closed by the utilization of a valve. In the present invention, the roles in air storage and peak regulation are played by the coal gas cabinet, and the roles in stabilizing and reducing the pressure of a pipe network, reducing the energy loss of the delivery of the oxygen and significantly reducing blow-off rate of the oxygen are played by the present invention. The electricity-saving rate can reach to 13.7 percent to 19.3 percent after the present invention is used for oxygen plants of iron and steel enterprises.

Description

technical field [0001] The invention belongs to the technical field of energy saving and consumption reduction of an air separation device, and in particular provides an air separation oxygen delivery system and method for reducing pressure and saving energy by utilizing the gas cabinet technology. Background technique [0002] Oxygen is like the blood of iron and steel enterprises, and it plays an extremely important role in steelmaking and ironmaking. Large-scale cryogenic air separation plants generally operate continuously and stably. In the case of fluctuating gas consumption, methods of increasing oxygen production and increasing oxygen storage pressure are usually used to improve the risk resistance and peak-shaving capabilities of the oxygen production system. The increase in oxygen production and the instantaneous imbalance of oxygen supply and demand lead to a high rate of oxygen release, resulting in a waste of energy. In order to balance the imbalance of oxygen ...

Claims

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Application Information

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IPC IPC(8): F17D1/04F17D3/01
Inventor 王立童莉葛孙淑凤岳献芳刘桂芹
Owner UNIV OF SCI & TECH BEIJING
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