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Air compressor anti-surge line temperature compensation method and device

A technology of temperature compensation and air compressor, which is applied in mechanical equipment, machines/engines, non-variable pumps, etc., and can solve problems such as inability to ensure safety and inability to exert the best performance of the unit

Inactive Publication Date: 2021-09-10
BEIJING CONSEN AUTOMATION CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the actual change of the surge curve with the temperature change is ignored, the safety of operation cannot be ensured, and the best performance of the unit cannot be exerted

Method used

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  • Air compressor anti-surge line temperature compensation method and device
  • Air compressor anti-surge line temperature compensation method and device
  • Air compressor anti-surge line temperature compensation method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0026] This embodiment provides an air compressor anti-surge line temperature compensation method, including compensation for the abscissa of the surge line, that is, compensation for the throat differential pressure, and compensation for the ordinate of the surge line, that is, the pressure ratio make compensation;

[0027] The specific process of compensation for the abscissa of the surge line is:

[0028] Considering that the inlet pressure of the air compressor is atmospheric pressure, which is basically a constant, the volume flow rate at the inlet of the air compressor is calculated according to the following formula:

[0029]

[0030] In the formula, K is the flow coefficient, ΔP is the throat differential pressure, T 1 is the inlet temperature (absolute temperature).

[0031] Under the same inlet volume flow rate F, the inlet temperature is determined by T 1 becomes T 2 When , the compensation formula of throat differential pressure is:

[0032]

[0033] The...

Embodiment 2

[0045] This embodiment provides an anti-surge controller for implementing the method described in Embodiment 1, including a surge line abscissa compensation module and a surge line ordinate compensation module, which are respectively used to adjust the abscissa and ordinate of the surge line Make compensation.

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Abstract

The invention discloses an air compressor anti-surge line temperature compensation method and device. According to the air compressor anti-surge line temperature compensation method and device, on the basis of an original anti-surge control, air compressor anti-surge line temperature compensation is added, the abscissa and the ordinate of a surge line are compensated, in the operation process of an air compressor unit, the opening degree of an emptying valve of the unit can be reduced or the emptying valve is completely closed, a large amount of unnecessary emptying is eliminated, and energy-saving effect of the unit is improved. In addition, the unit can operate safely and stably under different temperature conditions, and a risk that the air compressor enters a surge area is reduced.

Description

technical field [0001] The invention relates to the technical field of air compressors, in particular to an air compressor anti-surge line temperature compensation method and device. Background technique [0002] Air separation, that is, the separation of air, is the process of separating the components in the air by certain means to obtain the required oxygen, nitrogen and some rare gases. The air compressor unit is the air source and power source of the whole device, and plays a vital role in the production of the device. In the air compressor control system, the anti-surge control system is the key control link. Factors such as process production needs, unit safety, energy saving and consumption reduction must be considered comprehensively. If the surge line of the air compressor is out of standard, it will cause waste of driving energy, and even affect the safe operation of the unit, resulting in shutdown and production shutdown. [0003] At different temperatures, th...

Claims

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Application Information

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IPC IPC(8): F04D27/02
CPCF04D27/02
Inventor 杜森周政强季俊朱世凯李明进
Owner BEIJING CONSEN AUTOMATION CONTROL
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