Compressor air supply mixing anti-surge control method

Abstract

The invention belongs to the technical field of compressors, and particularly discloses a compressor air supply mixing anti-surge control method which comprises the following steps: S1, measuring air supply temperature, air supply pressure and air supply flow of a first-section inlet of a compressor; the air supply temperature, the air supply pressure and the air supply flow of a second-section inlet; the exhaust temperature and the exhaust pressure of a second-section outlet; s2, first-stage surge control is carried out, wherein the theoretical value of the first-stage outlet temperature is calculated; reasonably converting the theoretical value of the first-section outlet temperature; the opening degree of a corresponding valve is controlled, so that compressed gas flows back to the first-section inlet through a bypass; s3, second-stage surge control is carried out, wherein the temperature of a second-stage inlet after mixing in the cylinder is calculated; and the opening degree of the corresponding valve is controlled, so that the compressed gas flows back to the second-section inlet through the bypass. According to the method, the anti-surge bypass system is accurately controlled through fitting of the characteristic curve of the compressor and the operation working condition; and related data measurement is realized on the pipeline, disassembly and secondary assembly are not needed, and maintenance and replacement are facilitated.

Description

Technical field [0001] The present invention belongs to the field of compressor, and more particularly to a compressor filling mixed anti-surge control method. Background technique [0002] The compressor is a driven fluid machine that increases the low pressure gas into a high pressure gas, which is the heart of the refrigeration system. It sucked a low-temperature low-pressure refrigerant gas from the suction tube. After the motor is operated by the motor, the high-temperature high pressure refrigerant gas is discharged to the exhaust pipe to provide power for the refrigeration cycle. [0003] During operation, the large compressor needs to collect the import temperature, outlet temperature, import pressure, outlet pressure, and flow calculation by the bypass reflux after the flow rate after operation. Usually the above parameters described above use the pipeline meter to collect accurate data as the input value, and achieve the anti-surge in the unit by operation. When the com...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a compressor air supply mixing anti-surge control method to solve the problem that it is difficult to obtain various parameters of flow calculation conveniently and accurately in the existing measurement methods, resulting in low precision of anti-surge control

Images