Product gas compressor system

Abstract

The invention discloses a product gas compressor system. The system comprises a buffering tank, a compressor, a sealing system and a sealing gas source; two air inlets and an air outlet are formed in the buffering tank; first valves for controlling air intake are arranged on the two air inlets; the first valve is a remote control valve; the air outlet communicates with the air inlet end of the compressor through a compression air inlet pipe; the air outlet end of the compressor is further connected with a compression air outlet pipe; the sealing system is provided with a plurality of sealing gas inlet ends, one sealing gas inlet end of the sealing system communicates with the gas outlet end of the compressor through a first sealing gas inlet pipe, and the other sealing gas inlet end of the sealing system further communicates with the gas outlet end of the sealing gas source. The invention discloses a product gas compressor system. The system comprises a buffering tank, a compressor, a sealing system and a sealing gas source; two gas inlets and a gas outlet are formed in the buffering tank; first valves for controlling gas intake are arranged on the two gas inlets; the first valve is a remote control valve; the gas outlet communicates with the gas inlet end of the compressor through a compression gas inlet pipe; the gas outlet end of the compressor is further connected with a compression gas outlet pipe; the sealing system is provided with a plurality of sealing gas inlet ends, one sealing gas inlet end of the sealing system communicates with the gas outlet end of the compressor through a first sealing gas inlet pipe, and the other sealing gas inlet end of the sealing system further communicates with the gas outlet end of the sealing gas source.

Description

technical field [0001] The invention relates to the field of product gas compression, in particular to a product gas compressor system. Background technique [0002] The reaction product (product gas) of the propane dehydrogenation (PDH) unit needs to be pressurized by the product gas compressor to above 1.2MPa, and then sent to the cold box for gas-liquid separation. The liquid phase enters the propylene refining system, and after separation, the polymerization grade Propylene and the hydrogen-rich gas phase can be used as fuel and sent to the fuel gas system or sent to the hydrogen purification system to obtain high-purity hydrogen. The propane dehydrogenation unit generally has a 4-year operation cycle, and the product gas compressor is the core equipment. If there is no emergency during the operation cycle, the compressor must run continuously. [0003] The product gas compressor (referred to as REC) of the 450,000-ton / year PDH unit is divided into a low-pressure cylind...

AI Technical Summary

Problems solved by technology

At present, the V6103 propane and hydrogen supply lines at the compressor inlet buffer tank are only controlled by hand valves, which require on-site operation and adjustment by the operator, and the adjustment accuracy through hand valve adjustment is not high

[0005] When the compressor is working, the compressor needs to be sealed, but the existing sealing gas is input through the top of the depropanizer tower of the separation unit, which increases the burden on the depropanizer tower of the separation unit, and the gas output from the depropanizer tower of the separation unit is unstable, which will cause Affect the sealing effect; and input through the top of the depropanization tower of the separation unit, the sealing gas will be accompanied by liquid when it is input, and these liquids will cause damage to the compressor and the compressor sealing system, reducing the service life of the compressor

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