Method for forecasting surge in turbine compressor

Abstract

The invention discloses a method of surge prevention pre-alarm of turbo compressor. The turbo compressor has controller of surge prevention, it is preliminarily set a detection line of functional relation between pressure value and flow capacity value of exit of the compressor. It includes the following steps: alarm line of pressure valve and flow capacity valve of the exit of the compressor is set; the exit pressure valve and the exit flow capacity valve of the working point of the compressor is collected in real time; the exit pressure valve of working point and the detection line is compared with the exit pressure valve corresponded to the flow capacity valve of the working point to get a absolute valve of pressure difference; the exit pressure valve corresponded to the flow capacity valve of the working point is compared with the alarm line and the detection line to get a standard absolute valve of pressure difference; the pressure difference absolute valve is compared with the standard pressure difference absolute valve; if the former is less then the latter, the alarm device is touched off.

Description

technical field [0001] The invention relates to an anti-surge pre-alarm method for a turbo compressor, in particular to an anti-surge pre-alarm method for a turbo compressor with an anti-surge controller. Background technique [0002] like figure 1 , figure 2 As shown, the ordinate is the compressor outlet pressure P, and the abscissa is the flow rate Q. There is an upper limit on the operating point of the turbocompressor - the surge line 1, that is, the operating point 4 cannot cross the surge line 1. If the surge line 1 is crossed, the turbocompressor will generate surge, the unit will vibrate violently, and will be completely damaged in a short time. [0003] In order to prevent the operating point 4 from crossing the surge line 1 when the turbo compressor is running, the turbo compressor is generally equipped with an anti-surge controller. When the working point 4 reaches the air discharge line 2 (the working point 4 of the compressor will change with the change of...

AI Technical Summary

Problems solved by technology

[0004] The control principle of the anti-surge controller has the following disadvantages: since there is no alarm before the working point 4 reaches the vent line 2, the operator cannot intervene in advance before the working point 4 reaches the vent line 2 and the vent valve opens, because the vent valve Instant quick opening, the air volume and air pressure output by the compressor fluctuate greatly, affecting the normal production of the process

Images