Whole-line anti-surge control method for axial flow compressor

Abstract

The invention relates to an anti-surge control technology for a blast furnace blasting axial flow compressor, in particular to a whole-line anti-surge control method for an axial flow compressor. A pre-control line EFL, a surge control line ACL, a quick-opening blowdown line VOL, an actual surge line ASL and an emergency shutdown line EAL are drawn on a human-computer interface of an automatic control system, wherein the actual surge line ASL is drawn according to the standard throat pressure difference and the standard exhaust pressure formed when the axial flow compressor generates surges, and the throat pressure difference and the exhaust pressure according to which the pre-control line EFL is drawn are 90-92% of the standard throat pressure difference and the standard exhaust pressure respectively. By means of the method, the true performance of the axial flow compressor in all seasons can be reflected, user operation can be accurately guided, and use is safer and more reliable; the anti-surge control strategy is more elaborate and more steady, the influence of wide-range fluctuation of the blast capacity and air pressure of a blast furnace is avoided in the adjusting process, the air supply stability and continuity of the compressor are higher, and the requirement for continuous production of the blast furnace is met.

Description

technical field [0001] The invention relates to an anti-surge control technology for blast furnace blast axial flow compressors, in particular to a full-line anti-surge control method for axial flow compressors. Background technique [0002] At present, axial flow compressors generally have low exhaust pressure, large air volume, and long-term air discharge operation. The reasons for this are that the design parameters of the axial flow compressor are not consistent with the user's operating conditions, the unit's boosting capacity is limited, and the exhaust pressure design is too large. Insufficient quantity is also an important aspect. Judging from the surge curve obtained from the surge experiment, the throat differential pressure is relatively large, and the corresponding exhaust pressure is low, which makes the measured surge line relatively flat, especially when the vane angle is small, the boosting capacity is weak, The efficiency is relatively high when operating i...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a full-line anti-surge control method for axial flow compressors, which solves the problems of poor control accuracy, unstable control, energy waste, and easy misoperation that endanger the safety of the unit in the current anti-surge control technology of axial flow compressors. The problem

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