Vacuum
creating systems 1) based on vacuum hydrocirculating units 2) based on steam ejectors |
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Jet compression units for flare and low-pressure gases recovery 1) based of two-phase jet devices 2) based of steam ejectors | ||
Jet
absorption gas cleaning units for hydrocarbons removal from breathing gases and oil and petroleum products gases recovery |
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Jet
devices ejectors and injectors for various purposes |
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Technovacuum Ltd. +7 (495) 956-76-21 +7 (499) 261-99-98 +7 (499) 267-82-03 Russia, 105082, Moscow B.Pochtovaya str., 26 "B", build.2, 5-th floor, office 1, room 11A |
1) JET COMPRESSION
UNITS
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1 – liquid-gas jet device 2 - separator 3 – heat exchanger 4 - motive liquid pump I – low-pressure gas II – compressed gas to consumer III – excess of spent motive liquid IV – fresh motive liquid makeup |
Principle of jet compressor operation
The low-pressure gas, e.g., flare gas of refinery, is delivered to the inlet of the jet device 1. The motive liquid is supplied to the jet device by the pump 4. Various liquids that are involved in the process and may be mixed with the low-pressure gas can be used as motive liquid.
As a result of ejection process in the jet device, the gas-vapor mixture is compressed up to the required pressure. Simultaneously with compression, process of absorption of vapor contained in the low-pressure gas by the motive liquid can take place in the jet device.
The generated gas-vapor mixture goes from the jet device 1 to the separator 2, where gas and motive liquid separation occurs. The compressed gas is discharged from the separator 2 for utilization, for example, it is supplied to the fuel system of the plant. The motive liquid is delivered from the separator 2 to the heat exchanger 3 for cooling and then to the inlet of the pump 4. The excess of motive liquid is discharged from the unit through the level-control valve of the separator 2 for further treatment.
It is expedient to use as motive liquid any process flow coming for further separation, this allows to extract the absorbed components of low-pressure gas from the motive liquid.
In case of variable flow of compressed gas, several jet devices and motive liquid pumps can be connected to one separator.
Capacity control of the jet compressor is carried out by automatic
switching on/off the pumps and jet devices. This approach scheme allows
to respond to changes of gas flow discharge efficiently and to exclude
usage of gasholders.
Main advantages of jet compressor
As compared with traditionally used mechanical compressors, the jet compressors have a number of advantages:
Application field of jet compressors
Experience of industrial application of jet compressors
Jet compression unit at Turkmenbashy Refinery
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The first jet compressor for processing of flare gases was developed for Turkmenbashy Refinery and put in operation in 2000 (see a picture).
The jet compressor has shown the design objectives and is in operation at the present time. The maximum capacity of the jet compressor is 6000 nm3/h of flare gas compressed up to the pressure of 0.5 MPa. The light coking gas oil – a feedstock for catalytic cracking - is used as motive liquid of the jet compressor.
The hydrocarbon fractions Ñ3+ of the flare gas being dissolved in
the motive liquid are discharged from the jet compressor together
with balance excess of motive liquid and are delivered to catalytic cracking
unit where these Ñ3+ fractions are recovered.
Main technical data of the jet compresor at Turkmenbashy Refinery
Purpose
The unit for associated petroleum gas recovery is intended for compression and fractioning of associated petroleum gas and obtaining of dry gas and liquid hydrocarbon fractions (mainly Ñ3 – Ñ5). The unit was developed on the base of jet systems produced by TECHNOVACUUM Ltd. These jet systems were successfully introduced at more than 60 enterprises, including refineries and enterprises of fuel and energy complex in Russia and abroad.Layout of the unit for associated petroleum gas recovery
Operation principle of the unit for associated petroleum gas recovery
The associated petroleum gas, specifically from the 2nd and 3rd stages of crude separation units, is delivered to the inlet of the jet compressor consisting of two double-phase jet devices CA-1/1,2. Being ejected, the associated petroleum gas is compressed by motive liquid (gas condensate or diesel fraction) which is delivered into the CA-1/1,2 jet devices by the H-1 pump. Simultaneously with compression, absorption of hydrocarbons by the motive liquid takes place.
After the CA-1/1,2, the gas-liquid mixture is fed to the C-1 separator for separation of gas from the motive liquid. Then the motive liquid is delivered from the C-1 separator to the X-1 cooler for cooling and then to the inlet of the H-1pump.The motive liquid excess which is formed in the C-1 separator due to absorption of the C3+ hydrocarbon fractions is pumped out by the H-2 pump to the absorption-desorption unit for regeneration and extraction of the C3-C5 fractions. The gas, being compressed and partly cleaned from heavy hydrocarbons in the C-1 separator, is also delivered to the absorption-desorption unit where the gas is additionally cleaned from the C3+hydrocarbons.
Compressed dry gas is withdrawn from the unit for further application. Partly this gas can be delivered to the Ï-1 furnace as fuel component.The proposed unit can be implemented for recovery of the associated petroleum gas formed at all three stages of oil degassing.
The unit for associated petroleum gas recovery developed by TECHNOVACUUM Ltd. can extract up to 99 mass % from the 2nd and 3rd crude separation stages and about 84 mass % in case of fractioning of associated gas from all three stages of separation.
Main advantages of the unit for associated petroleum gas recovery
If you are interested in technology of jet compressor based on two-phase jet devices and you
plan to introduce it at your enterprise, please fill in the following
Purpose
Jet compressor is referred to gas ejectors which have a duct where mixing of two jets takes place with increase of total pressure of passive (low-pressure) gas flow due to high energy of active (high-pressure) gas flow. As a result, total pressure of gas mixture is more than pressure of passive flow but less than pressure of active flow. Steam, hydrocarbon mixtures and any other gaseous substances can be used as active or passive flow.Layout of jet compressor
Main advantages
Application areas
If you are interested in technology of jet compressor based on steam ejectors and you
plan to introduce it at your enterprise, please, fill in the following