SU1761193A1 - Vertical gas separator - Google Patents

Description

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(21) 4822196/26 (22) 03.05.90 (46) 09.15.92.Byul. No. 34 (71) Tatar State Research and Design Institute of the Oil Industry (72) R.Kh.Makhmudov, I.R. Sagbiev, F.F. Khami- Dullin, N.U. Bakirov, V.P.Tronov and F.R. Valeyev

(56) USSR Author's Certificate Ns 1489800, cl. On 01 D 19/00, 1987.

(54) Vertical gas separator

(57) The invention relates to the oil industry, in particular, to devices for separating gas from oil in oil preparation in fields. The aim of the invention is to intensify the process of gas separation and reduce the loss of light hydrocarbons. The gas separator consists of a housing 1 with nozzles for gas output 2 and a liquid 3. Inside the housing 1 there is a drop separator 4. A pipeline is connected to the gas separator housing for introducing a gas-liquid mixture 5, the vertical section of which is equipped with a tangential swirler 6, the upper part of which is connected to vertical pipe 7. The latter ends on top of the first expanded chamber 8, which through pipe 9 is connected tangentially to the housing of the gas separator 1, the pipe 8 is coaxially installed in chamber 8 smaller diameter 10 so that its lower input end is below the bottom of the chamber, and the upper output end ending with the second expanded chamber 11 is above the bottom of the second expanded chamber. The upper part of the second expanded chamber is connected by a pipe 12 to the gas zone of the separator. The lower part of the second chamber is connected via a pipeline 13 to the gas zone of the separator housing, the end of the pipeline 13 ends with a spray 14. 2 Cp. Files, 2 sludge.

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The invention relates to the oil industry, in particular, to devices for separating gas from oil in the preparation of oil in fields.

The aim of the invention is to intensify the gas separation process and reduce the loss of light hydrocarbons,

The goal is achieved by the described device, including a housing, a pipeline for supplying a gas-liquid mixture, on which a preliminary separation device with an extension is located.

chamber, nozzles for gas and liquid output.

New is that the pre-separation device is made in the form of a swirl, the upper part of which is equipped with a vertical pipe connected to an expansion chamber, in which a second vertical pipe of smaller diameter coaxially is installed, connected to the second expansion chamber, while the upper and lower parts of the second expansion chamber chambers connected by pipelines to the gas zone of the body

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top down in height, and the first expansion chamber is tangentially connected to the body.

New is also the fact that the input end of the second nozzle is installed below the bottom of the first expansion chamber, and the output end is above the bottom of the second expansion chamber.

New is also the fact that the outlet end of the pipeline connecting the lower part of the second expansion chamber with the housing is equipped with a spray gun located along the axis of the gas separator.

In Fig.1 schematically shows a section of the proposed separator; figure 2 - section aa of figure 1.

The gas separator consists of a housing 1 with nozzles for gas output 2 and a liquid 3. Inside the housing 1, in its upper part, there is a drop separator 4. A pipeline for supplying the gas-liquid mixture 5 is supplied to the gas separator housing, the vertical section of which is equipped with a tangential device - a swirler 6. Last connected to a vertical pipe 7, ending on top of the first expansion chamber 8, which through pipe 9 is connected tangentially to the gas separator housing 1. In chamber 8, a coaxially mounted coaxially com smaller diameter 10 so that the lower end of the inlet chamber is below its bottom and an upper outlet end enters the second expansion chamber 11, whereby its level is above the bottom. The upper part of the second expansion chamber 11 is connected by pipe 12, and the lower part by pipe 13 with the gas separator gas zone from top to bottom in height, with the end of the pipe 13 inside the gas separator ending with a spray gun 14 located on its axis. The outlet openings of the sprayer are directed downwards.

The device works as follows.

The gas-liquid mixture after the second stage of separation with a residual gas content of Zm3 / m3 through the pipeline 5 enters the swirler 6, where after passing the twisting channels the mixture receives intense rotational motion, after which the swirling flow enters the vertical pipe 7, in which under the action of centrifugal forces, gas the bubbles are forced out into the so-called gas cord, which is formed on the axis of the swirling flow. Next, the gas along with the foam through the nozzle 10 is discharged with great speed into the chamber 11. Here under the action the inertial forces of the foam hit the upper lid of the chamber 11, as a result of which it is destroyed. Separated with drip oil flows through the pipe 13 through

the sprayer 14 in the Central part of the separator, located above the zone of the oil in the separator. The gas released from the foam into the chambers 11 via the pipeline 12 enters the gas zone of the gas separator,

0 passes through the drip trap and is removed through the gas outlet nozzle 2.

Pre-degassed oil from port 7 flows into expansion chamber 8, from which it is withdrawn

5 in the pipe 9, connected tangentially to the body of the separator. The stack along the internal surface of the separator housing oil is additionally degassed, accumulates in the lower part of the separator, and then is discharged through pipe 3 into the process tank. And the gas separated from the oil, after passing through the droplet-bout trays 4, is removed through the gas outlet nozzle 2, and

5, the surface of the oil in the gas separator foam is destroyed by the irrigation of the dropping oil from the atomizer 14.

In the proposed device, the intensification of the separation process is achieved

0 due to the preliminary degassing of oil in the pipe 7, as well as due to the separate introduction of free gas and oil separator into the different areas of gas, which passed the primary degassing, and drip

5, the oil formed in the chamber 11 is used in the proposed device for the final destruction of the foam that forms on the surface of the oil inside the gas separator by irrigating it. In addition, the tangential injection of oil from chamber 8 into the gas separator also intensifies the degassing process, since firstly, the layers are not mixed due to different pulsations, impacts

5 and changes in the direction of movement that takes place in the device of the prototype as oil flows down the inclined shelves; secondly, a smooth entry of distilled oil into the bulk of the oil is provided,

0 which prevents secondary gas trapping by oil and additional foaming. It should also be considered positive that the area of the inner surface of the separator housing in real-life conditions is always greater than the surface area of the inclined shelves used in the prototype. But it is precisely the area of liquid spreading that, first of all, determines the intensity of gas release from the oil layer. It should also be noted that

during swirling movement along the internal forming surface of the separator housing, foaming of the oil layer occurs less intensively, i.e. foam is supplied by centrifugal forces.

The results obtained when testing the prototype and the proposed device showed that the residual gas content in the distilled oil is 1.2-1.6% by volume. and 0.4-0.45% by vol. respectively.

The technical and economic efficiency of the proposed device is due to the reduction of oil loss from evaporation in process tanks as a result of a decrease in the oil content of occluded gas by 2.7-4.0 times.

Claims (3)

Claim 1. Vertical gas separator, comprising a housing, a gas-liquid mixture supply pipeline, on which a preliminary separation device with an expansion chamber is placed, gas and liquid branch pipes, characterized in that, in order to intensify the process t h IL z ± z: zr gas separation and reducing the loss of light hydrocarbons, the preliminary separation device is made in video-vortexes, the upper part of which is vertical pipe connected to the expansion chamber, in which a second vertical pipe of smaller diameter, which is connected to the second expansion chamber, is coaxially mounted In this case, the upper and lower parts of the second expansion chamber are connected from top to bottom by gas pipelines with the gas zone of the housing, and the first expansion chamber is connected tangentially to the housing. 2. The gas separator according to claim 1, about tl and h and yu and the fact that the input end of the second pipe is installed below the bottom of the first expansion chamber, and the output end is above the bottom of the second expansion chamber cameras. 3. The gas separator according to claim 1, wherein the output section of the pipeline connecting the lower part of the second expansion chamber with the housing, it is supplied with the sprayer located along the axis of the gas separator. .    R , / pLrJ t L z ± z: zri / Fig. Z