Sunday, August 15, 2010

ABOUT GAS COMPRESSION MACHINERY:

ABOUT GAS COMPRESSION MACHINERY:




Compressors are the machines required for transportation / movement of gases in a system. The purpose of compression is simply to increase the pressure of a gas from one level to another. Depending on a host of circumstances and situations, the pressure increase imparted to a gas will be from a fraction of a bar in laboratory equipment to literally tens of hundred of bars in hypercompressors used for the manufacture of polyethylene.

Before we embark on our more thorough consideration of centrifugal compressors, we should examine gas compression machinery in general. In a typical process plant, compression services include instrumentation and plant air, combustion air for burners and furnaces, gas circulation or simple
elevation to pressure conditions that will allow chemical reactions to take place. Gas volumes will vary from laboratory quantities to flows well in excess of a 2 million m3/hr.

Not to many years ago, it was common practice to use reciprocating compressors when high pressures were required. Dynamic compressors were usually called blowers when air or gas was compressed to about 40 Psig. The term compressor was applied to any such machine when air or gas was compressed to a final pressure over 50 Psig. In recent years, this differentiation has become meaningless. Industry now uses the term compressor for all types of machines compressing air or gas.

See Also:










OVERHUNG CENTRIFUGAL COMPRESSORS


OVERHUNG CENTRIFUGAL COMPRESSORS DIAGRAM


 Mixed Flow Compressors


Horizontal Split Centrifugal Compressor Diagram 


Horizontal Split Centrifugal Compressor detail and operation 



Centrifugal Compressors:








Reciprocating compressors :




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