Gas Molecular Weight Changes On Centrifugal Compressor Control And Optimization Design

Centrofual compressor is one of the core equipment of power in large domestic factories. The advantages of the centrifugal compressor relative to other compressor is obvious:(1) has a smooth performance curce; (2) has a wide scope of operation; (3) could achieve higher compression ratio; (4) easy to realize automation and large scale. At the same time, the shortcomings of the centrifugal compressor also obvious: (1) surged; (2) the change of gas molecular had a great influence on the compressor operation. Solve the change problem of gas molecular on the compressor operation can make the production more smoothly, energy conservation and efficiency at the same time.This study first expounded the important position of centrifugal compressor in domestic factories, and introduced the present situation of the compressor control system. Then analyzed the gas MW changes on compressor control and operation from compressor performance curce design, compressor control system, algorithm and actual operation. Introduced the dimensionless coordinates of Compressor Control Corporation for MW changes on compressor control and operation. At last, through a detailed reconstruction of the rich gas compressor to clarify that MW changes on compressor control and operation problem can be addressed by reconstructing compressor control system. At the same time through surged test on line and other measures to achieve the energy conservation and emissions reduction of the factory. First, redesign the return line of compressor, Recalculate the comprssor performance curve, instruments and valves. Second, during the period of maintenance, complete the field wiring, confirm the installation location, perform the system test, turbine solo run and compressor air test. The Third, when unit start, perform surged test work on line. Find out the real surge limit line of the compressor. All controllers turn to auto, perform fine tuning work. At last, when load changes, or MW of gas changes, the compressor contrl system restored automatically. To ensure the compressor was safe and steady, achieve the effect of saving energy and reducing consumption.