VHC units are used for vacuum creation in distillation columns for oil initial processing and in other units of oil-petroleum and chemical industry operating under vacuum.
Using VHC units, steam ejectors which are traditionally used for creating vacuum in distillation columns at refineries may be substituted for liquid-gas jet devices which operate on a fraction of distillation products (gas oil or diesel fraction).
This decreases power inputs and operating costs needed for vacuum creation and makes vacuum creating system ecologically pure due to elimination of steam usage and of steam condensate cleaning from oil products.
Annual saving due to changing of steam ejector system for VHC unit at AVT- 6 is estimated to millions USD. Figure presents a picture of VHC unit at atmospheric residue vacuum distillation unit.
JCU are used for compression of any low-pressure gases which are generated during oil processing and oil-and-gas producing technological processes. Gas compression in JCU takes place due to high-pressure active flow delivery to it. Motive liquid at pressure generated by pump or a liquid at existing high pressure (e.g. at gas-condensate stratum pressure) is used as active flow. Jet compressors which use stratum potential energy are employed at oil-and-gas processing 1 fields and are included in technological processes at plants for treatment of gas, condensate and oil.
JAU are used for recovery of hydrocarbon vapor formed during pouring of oil or oil products to railway barrels, tankers or tank batteries.The air-vapor mixture is delivered from the gasoline loading rack to the inlet of the jet device 1. The gasoline delivered by the pump 4 is used as motive liquid in the jet device. As a result of ejection process, compression of air-vapor mixture and absorption of gasoline vapor by motive liquid take place in the jet device. After the jet device, the gas-liquid mixture is delivered to the separator 2 where motive liquid and air separation takes place. The final cleaning of air from hydrocarbon vapor is carried out in the absorber 5 where gasoline cooled in the chilling unit 6 is delivered as an absorbent. The purified (free of hydrocarbons) air is vented from the absorber 5 to atmosphere (II). The circulating motive liquid is delivered from the separator 2 to the cooler 3 (to be installed, if necessary) for cooling and then it is delivered to the pump 4 inlet. To ensure refreshment of the motive liquid, makeup (III) with fresh gasoline is provided. Excess of motive liquid (IV) is discharged through the level control valve of the separator 2 from the unit to the loading rack or to the tank battery.
Ejectors and Injectors are used in many branches of industry: petrochemical, gas-and-oil producing, oil refinery industries, food industry, thermal power engineering, defense industry etc. The development of jet devices of various types (liquid-gas, gas-gas, vapor-gas, vapor-liquid (injectors), liquid-liquid) is carried out in accordance with technical requirements of the Customer using the advanced calculation techniques worked out by specialists of Technovacuum Ltd. and experimentally tested.