Control for pipeline gas distribution system

A distribution system, management and control technology, applied in the direction of electric fluid pressure control, fluid pressure control, flow control, etc., can solve expensive and other problems

Inactive Publication Date: 2007-11-21
PRAXAIR TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as liquid oxygen is a more expensive product to produce than gaseous oxygen, keeping liquid oxygen in storage is an expensive proposition

Method used

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  • Control for pipeline gas distribution system
  • Control for pipeline gas distribution system
  • Control for pipeline gas distribution system

Examples

Experimental program
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Embodiment Construction

[0026] Referring to Figure 1, a gas distribution system 1 controlled in accordance with the present invention is illustrated. It should be understood that the illustrated gas distribution system 1 is for demonstration purposes, and the system controlled according to the present invention may be more complicated or simpler than the illustrated system.

[0027] The gas distribution system 1 includes pipe sections 10 and 12, which supply gaseous oxygen and gaseous nitrogen to consumers 14 and 16 respectively. The pipe sections 10 and 12 are supplied with gaseous oxygen and gaseous nitrogen by air separation equipment (ASP1 and ASP2) 18 and 20. The air separation devices 18 and 20 are connected to the pipe sections 10 and 12 by oxygen pipes 22 and 24 and nitrogen pipes 26 and 28. In this regard, the purity of the oxygen and nitrogen supplied depends on the type of air separation equipment used to meet the needs of consumers 14 and 16.

[0028]The air separation devices 18 and 20 separ...

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Abstract

A method of controlling a gas distribution system in which one or more air separation plants supply gaseous oxygen and nitrogen products to pipeline sections. The air separation plants are controlled by supervisory control systems that direct production rates of the gaseous products to be consumed by customers connected to the pipeline sections. The gas distribution system is controlled by a model predictive control system in which empirically determined open loop response models are used to generate open loop responses of the pipeline sections due to changes in customer demands. Optimized closed loop responses in production rate requests to the supervisory control systems are generated by model predictive control techniques.

Description

Invention field [0001] The present invention relates to a method for controlling a gas distribution system. The system includes one or more pipe sections for supplying gaseous oxygen and / or nitrogen from an air separation device. In particular, the present invention relates to such a method in which a model predicts a controller Control the air separation equipment to supply gaseous oxygen and / or nitrogen in response to pipeline pressure and consumer demand. Background of the invention [0002] The gas distribution system includes air separation equipment, which produces gaseous oxygen and gaseous nitrogen products by cryogenically distilling air through a well-known technique. These products are supplied to consumers by pipelines that include one or more parts. This gas distribution system is manually controlled by the supplier to ensure that each part of the pipeline is above a certain minimum pressure required by the consumer. The pressure in the pipe sectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/02G06F7/60G06F17/00G06F17/10G06F19/00G05D7/00G05D11/00G05D16/00B01D46/46G01F11/00G01F17/00G06G7/48G06G7/50G06G7/58B67B7/00B67D5/00G05D16/20
CPCG05D16/20Y10T137/268
Inventor L·梅甘D·F·伦诺克斯P·F·沙夫D·阿德贝昆M·朱
Owner PRAXAIR TECH INC
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