Turbine gas compressor surge-proof control device

Abstract

The invention relates to an anti-surging control device of a turbo-type gas compressor. The device comprises a compression ratio, current and flow detection device, a programmable controller and a slope reduction generator; the compression ratio, current and flow detection device is used for detecting and sending a compression ratio, current and flow signal to the programmable controller; the programmable controller calculates the change rates of the compression ratio, the power and the flow; three change rates are compared with set threshold values; when the changes rates of the compression ratio, the power and the flow respectively excess the set threshold values, factors for triggering surging of the compressor are judged; the programmable controller triggers the slope reduction generator to start an anti-surging valve connected with the compressor. The anti-surging control device in particular aims at the anti-surging control of the turbo-type gas compressor under the working conditions of the mutation of the load, the output pressure and the flow of the compressor caused by the mutation of the using amount of users, can effectively prevent the compressor from surging and ensure the safe operation of the turbo-type compressor.

Description

technical field [0001] The invention relates to an anti-surge control device for a turbo type gas compressor. Background technique [0002] Due to the increase of the outlet pressure of the turbo gas compressor, the backflow phenomenon occurs, and the turbo gas compressor can no longer continuously output the fluid medium, and a surge phenomenon will occur. Once the surge occurs, the turbo compressor will generate severe vibration and additional heat pressure, which will cause great damage to the mechanical part of the compressor. When the surge occurs, the discharge pressure can be reduced or the suction pressure can be increased by means of backflow and release. In this way, the turbo gas compressor can continuously output the fluid medium to ensure the safe operation of the turbo gas compressor. [0003] Existing anti-surge control systems for turbine gas compressors are based on the three schemes of constant pressure, constant flow, and pressure-flow comparison for anti...

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Problems solved by technology

[0003] Existing anti-surge control systems for turbine gas compressors are based on the three schemes of constant pressure, constant flow, and pressure-flow comparison for anti-surge control. The anti-surge control systems are not the same, resulting in confusion in the anti-surge control systems of different manufacturers and different types of turbo compressor units

The anti-surge schemes of most turbo gas compressor manufacturers are mainly designed for the safe operation of the gas compressor body, which cannot meet the actual requirements of production. The user's consumption is not uniform, but abrupt, which means Compressor load, output pressure or flow is sudden, which is not good for the normal operation of the compressor, and may also cause surge

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