based on vacuum hydrocirculating (VHC) units
for handling of flare, associated petroleum and other low-pressure gases
absorbtion gas cleaning units
for removal of hydrocarbons from breathing gases and recovery of oil gases and oil products gases
ejectors and injectors of various purpose
Russia, 105082, Moscow
B.Pochtovaya str., 26 "B", build.2, 5-th floor, office 1, room 11A
|1 – liquid-gas jet device
2 - separator
3 – heat exchanger
4 - pump
I – low-pressure gas
II – compressed gas to consumer
III – excess of spent motive fluid
IV – fresh motive fluid makeup
Principle of operation of jet compressor
The low-pressure gas, e.g., flare gas of refinery, is delivered to the inlet of the jet device 1. The motive fluid is pumped into the jet device by the pump 4. Various fluids present in the process which may be mixed with the pumped gas can be used as an motive fluid.
As result of ejection process in the jet device, the gas-vapor mixture is compressed up to the required pressure. Simultaneously with compression in the jet device, there may take place a process of absorption of vapors contained in the pumped gas by the motive fluid.
The produced gas-vapor mixture after the jet device enters the separator 2, where the separation of gas from motive fluid occurs. The compressed gas is discharged from the separator to downstream operations, as example, it is directed to the fuel system of the plant. The motive fluid from separator is delivered to the cooler 3 for cooling, whereupon it enters to the suction of the pump 4. The excess of motive fluid is discharged from the unit through the level-control valve of separator 2 for further recovering.
It is expedient to use process flows coming for further separation as motive fluid, this allows to extract the absorbed components of low-pressure gas.
In case of variable flow of compressed gas, there are connected several jet devices and operating fluid pumps to one separator.
Capacity control of the jet compressor is carried out by automatic
engagement and disengagement of pumps and jet devices. Such scheme allows
to respond to changes of gas flow discharge efficiently and to refuse
the use of gasholders.
Basic advantages of jet compressor
As compared with traditionally used mechanical compressors, the jet compressors have a series of advantages:
Field of application of jet compressors
Experience of industrial application of jet compressors
Jet compression unit at Turkmenbashy Refinery
The first jet compressor for handling of flare gases of Turkmenbashy Refinery was developed and put in operation in 2000 (see a picture).
The compressor has shown the design objectives and at present it is in operation. The maximum capacity of the jet compressor makes up 6000 nm3/h of flare gas compressed up to the pressure of 0.5 MPa. As motive fluid of the jet compressor there is used the light coking gas oil – a feedstock for catalytic cracking.
The hydrocarbon fractions Ñ3+ of the flare gas dissolved in
the motive fluid are discharged from the jet compressor together
with balance excess of motive fluid and delivered to catalytic cracking
unit where their recovering occurs.
Main process characteristics of jet compresor at Turkmenbashy Refinery
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