Pumps – Combined
Patent
1998-11-17
2000-08-22
Freay, Charles G.
Pumps
Combined
417 76, 95176, 95177, F04B 2300
Patent
active
06106243&
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to the field of oil processing and the petrochemical industry, mainly to installations for vacuum distillation of liquids, such as crude oil for example. It can be used particularly for the rectification of oil stock.
A vacuum-producing unit for crude oil rectification is known, wherein a water steam ejector provides a vacuum in a rectification column (see U.S. Pat. No. 2,680,709, cl. 202-204, 1954).
During operation of this unit vapors of a liquid product mix with the motive water steam. As a result, water condensate with emulsified impurities of oil derivatives is generated. Purification of such waste water from detrimental oil emulsions is a complex technical problem causing significant expenses.
RU patent No. 2048156 (M cl. B 01 D 3/10, 1995) discloses a vacuum unit for the distillation of liquids, which has been chosen by the present inventors as the prototype for the invention. The unit comprises a vacuum rectification column and a vacuum-producing device. The rectification column has a pipeline for feed of a stock product and pipelines for export of a gas-vapor phase and a liquid fraction. The vacuum-producing device is composed of a liquid-gas jet apparatus, a separator and a pump.
In operation of this unit evacuation of the gas-vapor phase from the rectification column is effected by the liquid-gas jet apparatus, which uses the liquid fraction exported from the column as a motive medium. Use of such unit substantially reduces the discharge of waste water with ecologically harmful impurities.
However, the prototype unit has a low efficiency due to the contamination of the motive liquid by oil derivatives and due to the absence of makeup supply of the motive liquid during operation of the vacuum-producing device.
SUMMARY OF THE INVENTION
The present invention is aimed at a rise in efficiency and productivity of the jet pump vacuum unit by providing optimum conditions for makeup supply of the motive liquid to the vacuum-producing device.
The recited problem is solved as follows. A vacuum-producing unit for distillation of a liquid product, comprising a vacuum rectification column with pipelines for feed of a stock product and for export of a gas-vapor phase and at least one liquid fraction, and a vacuum-producing device composed of a liquid-gas jet apparatus, a separator and a pump, is furnished with a mixer. The mixer is a part of the vacuum-producing device, so that the gas the inlet of the liquid-gas jet apparatus is connected to the pipeline for export of a gas-vapor phase, the liquid inlet of the liquid-gas jet apparatus is connected to the discharge side of the pump, the outlet of the liquid-gas jet apparatus is connected to the separator, the gas outlet of the separator is connected to consumers of compressed gas, the outlet of the mixer is connected to the suction side of the pump, the inlet of the mixer is connected both to the pipeline for export of a liquid fraction from the rectification column and to the liquid outlet of the separator.
The location of the mixer at the liquid outlet of the separator and porting of the mixer to the pipeline for export of a liquid fraction from the column allow adjustable and controllable mixing of the motive liquid with the liquid fraction from the rectification column. It follows that, the relative position of the mixer in the vacuum-producing device has great importance.
It is expedient to place the mixer near to the liquid outlet of the separator. Delivery of the liquid fraction from the rectification column into the mixer is also preferable in order to provide a makeup of the motive liquid of the vacuum-producing device. This allows not only refreshing of the motive liquid, but also more intensive condensation of easy-condensable components of the gas-vapor phase in the liquid-gas jet apparatus. Besides, feed of the liquid fraction into the vacuum-producing device through the mixer reduces hydraulic losses during mixing of the liquid fraction with the motive liquid, and, as a result, allows more eff
REFERENCES:
patent: 2680709 (1954-06-01), Skinner
patent: 3796640 (1974-03-01), Boomer
patent: 4542196 (1985-09-01), Morris et al.
patent: 4855524 (1989-08-01), Harandi et al.
patent: 5015359 (1991-05-01), Harandi et al.
patent: 5214157 (1993-05-01), Healy et al.
patent: 5327735 (1994-07-01), Hatton
Evora Robert Z.
Freay Charles G.
Oathout Mark A.
LandOfFree
Jet pump installation for creating a vacuum during distillation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Jet pump installation for creating a vacuum during distillation , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Jet pump installation for creating a vacuum during distillation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-573509