Automatic detecting and adjusting system for surge of centrifugal compressor

A centrifugal compressor, automatic detection technology, applied in the direction of machines/engines, mechanical equipment, non-variable pumps, etc., can solve the problems of centrifugal compressor surge hazards, achieve good results, and prevent additional costs The effect of increasing and liberating the labor force

Inactive Publication Date: 2018-10-02
CHONGQING JIANGJIN SHIPBUILDING IND
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  • Application Information

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Problems solved by technology

[0003] In order to solve the problem of the harmfulness of centrifugal compressor surge, it is necessary to detect the surge in time and accurately when the compressor occurs, and take a quick and effective method to make the compressor avoid the surge area and return to normal work state, the present invention proposes an automatic detection and adjustment system for centrifugal compressor surge, which can automatically detect compressor surge and automatically adjust the parameters of the compressor, thereby effectively enabling the compressor to return to a stable running status of

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  • Automatic detecting and adjusting system for surge of centrifugal compressor
  • Automatic detecting and adjusting system for surge of centrifugal compressor
  • Automatic detecting and adjusting system for surge of centrifugal compressor

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Embodiment Construction

[0022] The structural diagram of an automatic detection and adjustment system for centrifugal compressor surge is shown in figure 1 As shown, the system mainly includes a compressor body 1, a noise analyzer 2, a butterfly valve 3, a PLC cabinet 4, an air intake pipe 5, an exhaust pipe 6, and a branch pipe 7, etc., and a PLC controller is installed in the PLC cabinet 4. Among them, the noise analyzer has the function of analyzing the decibels of noise and the frequency of noise; the butterfly valve is a proportional regulating valve that can precisely control the opening of the valve; the PLC cabinet communicates with the noise analyzer, butterfly valve, and compressor body Signal.

[0023] The principles and methods of compressor surge automatic detection are as follows:

[0024] When the compressor surges, it will emit abnormal airflow noise, which is much louder than the noise during normal operation of the unit, and the noise emitted during surge is generally low-frequency...

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Abstract

The invention discloses an automatic detecting and adjusting system for the surge of a centrifugal compressor. The automatic detecting and adjusting system comprises a compressor body, an adjusting valve, a noise analyzer, a PLC, a gas inlet pipeline and an exhaust pipeline. The adjusting valve and the compressor are connected in parallel. The noise analyzer is connected with the compressor body.The PLC is connected with the noise analyzer, the adjusting valve and the compressor body. The decibels and frequency of noise produced by the compressor body are judged through the noise analyzer, and if the surge condition is met, the noise analyzer gives out an alarm signal, and the alarm signal is transmitted to the PLC. After the PLC detects the alarm signal, the PLC gives out a signal, the adjusting valve is opened to an initial opening degree A, at this moment, gas flow of the exhaust pipeline arrives at the gas inlet pipeline, the compressor body stops surge, then, the PLC sends out asignal, and the opening degree of the adjusting valve is gradually decreased till the adjusting valve is completely closed.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to an automatic detection and adjustment system for centrifugal compressor surge. Background technique [0002] Centrifugal compressors are widely used in petroleum, chemical, metallurgical and other industries, and their safe and reliable operation is of great significance to industrial production. However, centrifugal compressors are sensitive to changes in gas pressure, flow, and temperature, and are prone to surge. Surge is an inherent phenomenon of centrifugal compressors. The reason for the surge is that when the flow rate of the centrifugal compressor decreases to a minimum value, the outlet pressure will suddenly drop, and the pressure in the pipeline will be higher than the outlet pressure, so the gas will flow back to the outlet. In the machine, until the outlet pressure rises and the gas is sent to the pipeline again; when the pressure in the pipeline returns t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/02
CPCF04D27/001F04D27/0215F04D27/0223F04D27/0292
Inventor 尹贤军侯春峰
Owner CHONGQING JIANGJIN SHIPBUILDING IND
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