SU1646572A1 - Apparatus for degassing of liquid - Google Patents

Abstract

The invention relates to the oil and gas industry and can be used in the preparation of oil and hydrocarbon condensate for transport. The aim of the invention is to intensify the process of degassing and utilization of the emitted gas. The device comprises a tank in which tubular elements for venting gas are arranged in steps in height. The tubular elements are made in the form of semipermeable membranes or gas permeable fluoroplastic filter elements. The device is equipped with a gas discharge pipeline with an ejector connected by means of tubes with valves to the upper ends of the elements and a gas supply pipeline to the purge. 1 il.

Description

The invention relates to the oil and gas industry and can be used in the preparation of oil and hydrocarbon condensate for transport, as well as priroegazirovanii hydrocarbon condensate and water oil and gas emulsion.

The purpose of the invention is to intensify the degassing process and utilization of the released gas.

The drawing schematically shows a device for degassing a liquid.

The device comprises a container 1 in which tubular elements 2 for exhausting gas are arranged in steps in height. The tubular elements 2 are made in the form of semipermeable membranes or gas permeable fluoroplastic filter elements. The device is equipped with gas piping 3 with an ejector 4. Gas piping 3 is connected by means of pipes 5 with valves 6-8 to the upper ends of 9 tubular elements 2. The device includes a pipeline 10 for supplying gas to the purge connected by pipes 11 to 14 with the lower ends of 15 elements 2. Elements 2 are placed along the shelves at the height of the degassed liquid at a plant of 0.5-1.0 m, depending on the physicochemical characteristics of the degassed liquid.

The device works as follows.

After filling the tank 1 with a degassed liquid, the valves 6-8 are opened so as to maintain a predetermined pressure drop across the walls of the filter elements 2, which ensures the flow of gas from the liquid through the walls of the elements 2 inwards. In this case, the pressure differential should not exceed the tensile strength of the filter element. Gas degassing from the lower shelves of filter elements under the action of hydrostatic pressure coming CS

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em in the ejector 4 with excess pressure. The gas pressure is triggered in the diffuser of the ejector 4 to a pressure at which a slight vacuum is created in the mixing chamber of the ejector, where gas from the upper filter elements or from the gas space above the liquid surface enters. Overpressure of oil and gas separators and sumps is maintained at the oil and gas separators and sumps. 3-0.6 Mfla. Under these conditions, excessive pressures of gases collected from the lower shelves allow a vacuum to be created in the ejector to collect gas from the upper stages and feed it to the collection point.

If necessary, the pipeline 10 and the pipes 11c can be used to supply air or nitrogen to the filter elements to blow through the filter elements. The valves 6-8 must be closed. Re-purging cleans the surface of the filter element from contamination.

The use of the proposed degassing device in the field preparation of oil and hydrocarbon condensate allows to intensify the degassing process, reduce the loss of hydrocarbon raw materials and reduce metal and energy costs.

Claims (1)

Invention Formula A device for degassing a liquid, which includes a tank in which tubular elements for venting gas are placed in steps, characterized in that, in order to intensify the process of degassing and utilization of the released gas, the tubular elements are made in the form of semipermeable membranes or gas-permeable fluoroplastic filter elements. moreover, the device is equipped with a gas exhaust pipeline with an ejector connected via pipes with valves to the upper ends of the elements and a gas supply line to the purge connected to pipes through the pipes to the lower ends of the elements.  15 Bx 9  If II & Ј 9