RU51894U1 - BUFFER CAPACITY GAS SEPARATOR - Google Patents

Abstract

The utility model relates to the oil and gas industry and can be used at the facilities for the collection and field preparation of oil in the processes of separating gas from the gas-oil mixture at the first and second stages of oil separation. The objective of the utility model is to improve the quality of oil preparation and the efficiency of oil separation in oil and gas collection and treatment plants. The solution to the problem is achieved in that in the buffer tank-gas separator consisting of a housing, an inlet guide box, an upper inlet and a lower outlet pipe, inclined separation shelves are mounted along which the gas-oil mixture moves from the upper inlet pipe to the lower part of the buffer tank (to the lower output pipe ) Inclined separation shelves with small thresholds are arranged in the form of steps that expand sequentially as they decrease. The effectiveness of the proposed buffer tank-gas separator is achieved by reconstructing the internal filling of the buffer tank by installing inclined separation shelves in a hollow buffer tank, which allows to improve the process of oil degassing with a minimum of metal production costs. The installation of a buffer tank-gas separator with inclined separation shelves provides additional advantages by reducing the amount of gas in the pumped oil: at the first stage of separation - oil production facilities - BPS (booster pump station), GU (group installation), joint venture (prefabricated

point), when pumping the separated oil to the second separation stage: - the efficiency of the transfer pumps increases; - decreases the mixing of the oil and gas stream and thereby reduces the hydraulic resistance; - the gas separated at the first separation stage moves naturally (under its own pressure), which reduces the compressors' efforts when pumping the remaining gas from the second separation stage. at the second stage of separation, oil treatment facilities - UPVSN (sour oil processing plant) and Commodity park: inclined separation shelves ensure uniform oil flow into the buffer tank - gas separator, which reduces foaming; reduced DNP (saturated vapor pressure), which leads to an increase in the quality of salable oil. The proposed buffer tank-gas separator can be manufactured industrially, which is confirmed by the tests of the prototype, ongoing. Using a buffer tank-gas separator allows you to comply with environmental safety and improve working conditions of staff, thereby increasing the culture of production.

Description

The utility model relates to the oil and gas industry and can be used at facilities for the collection and field treatment of oil in the processes of separating gas from the gas-oil mixture at the first and second stages of oil separation.

Prerequisites for creating a utility model.

At the facilities for the collection and preparation of oil, gas is taken in buffer tanks. These tanks are hollow and are not intended for use as oil and gas separators. There are also oil and gas separators with internal vertical partitions, which are effective at high speeds of the supplied gas-oil mixture.

Analysis of the current level of technology in this field showed the following:

various oil and gas separators are used at oil collection and field treatment facilities, which do not allow solving the problem of oil degassing effectively. All this leads to a deterioration in the quality of the oil being prepared and as a result:

- reduced efficiency (efficiency) of transfer pumps;

- increases the hydraulic resistance of pipelines;

- additional efforts are required to operate the compressors when pumping gas that has not separated in the first stage of separation from the second stage of separation;

- increases the DNP (saturated vapor pressure) of commercial oil.

Known apparatus 1-200-3400-0.8-2-1-3-0 (Chernivtsi Engineering Plant named after Dzerzhinsky), which is a

hollow tank with external nozzles for supplying and discharging oil. The gas separation process is as follows: a stream of gas-oil mixture poured from the upper inlet pipe from the impact on the surface of the working oil level is degassed.

The disadvantages of the known apparatus are: poor separation of gas from oil, the formation of gas foam, which leads to an increase in DNP. This hollow tank is not intended for operation as an oil and gas separator and is used as an oil sump.

There is an oil and gas separator NGS 11-0.6-2400-1T of OAO Dmitrovkhimmash, consisting of a hollow tank with external pipes for supplying, draining oil and internal filling in the form of vertical partitions.

The process of gas separation in this device is as follows: when the gas-oil mixture flows from the upper side pipe through the vertical partitions, gas is separated due to the formation of vortex flows between the partitions.

The disadvantage of this oil and gas separator is that this process is effective in the case of a gas-oil mixture with a high pressure, which is rare, especially in the second stage of separation.

The objective of the utility model is to improve the quality of oil preparation and the efficiency of oil separation in oil and gas collection and treatment plants.

The solution to the problem is achieved in that in the buffer tank-gas separator consisting of a housing, an inlet guide box, an upper inlet and a lower outlet pipe, inclined separation shelves are mounted along which the gas-oil mixture moves from the upper inlet pipe to the lower part of the buffer tank (to the lower output pipe ) Inclined separation shelves with small thresholds are arranged in the form of steps that expand sequentially as they decrease.

The utility model is illustrated by drawings, where in Fig. 1 (side view) and Fig. 2 (top view).

The buffer tank-gas separator includes a housing 1, inside of which are mounted:

- an input guide box 2 for uniformly supplying the gas-oil mixture to the inclined separation shelves 3, thereby preventing the formation of gas foam inside the buffer tank-gas separator, which accelerates the process of degassing oil;

- four inclined separation shelves 3 with small thresholds (protrusions) 4 in the front and side guides (not shown in FIG.). Inclined separation shelves 3 are arranged in the form of steps to increase the path length and time of movement of the gas-oil mixture;

- remote droplet eliminator 5 for collecting droplets of oil from a stream of separated gas.

- the upper inlet pipe for supplying the gas-oil mixture and the lower outlet pipe for draining the separated oil (not shown in FIG.).

An anti-corrosion coating is applied to the inside of the housing 1 and there are treads for additional anti-corrosion protection (not shown in FIG.).

The buffer tank-gas separator works as follows: the gas-oil mixture is fed through the inlet guide box 2 into the buffer tank and, sequentially flowing down the inclined separation shelves 3, is directed by gravity to the lower part of the buffer tank.

The movement of the gas-oil mixture resembles a “waterfall”. Inclined separation shelves 3 are arranged in steps to increase the path length and time of movement of the gas-oil mixture, in addition, the inclined separation shelves 3 expand as they decrease to increase the spreading area with a thin layer of the gas-oil mixture (see Fig. 2). When the gas-oil mixture hits the thresholds 4 of inclined separation shelves 3 and spreads in a thin layer, intense release occurs

occluded gas bubbles from oil (i.e. oil degassing) and thereby the separation efficiency is significantly increased.

The separated oil through the lower outlet pipe enters the flow line.

The effectiveness of the proposed buffer tank-gas separator is achieved by reconstructing the internal filling of the buffer tank by installing inclined separation shelves in a hollow buffer tank, which allows to improve the process of oil degassing with a minimum of metal production costs.

The installation of a buffer tank-gas separator with inclined separation shelves provides additional advantages by reducing the amount of gas in the pumped oil:

at the first stage of separation - oil production facilities - BPS (booster pump station), GU (group unit), joint venture (collection point), when pumping the separated oil to the second stage of separation:

- the efficiency of transfer pumps increases;

- decreases the mixing of the oil and gas stream and thereby reduces the hydraulic resistance;

- the gas separated at the first stage of separation moves naturally (under its own pressure), which reduces the compressors' efforts when pumping the remaining gas from the second stage of separation. at the second stage of separation, oil treatment facilities - UPVSN (high-sulfur oil processing unit) and Commodity park:

inclined separation shelves ensure uniform flow of oil into the buffer tank-gas separator, which reduces foaming;

- reduced DNP (saturated vapor pressure), which leads to an increase in the quality of salable oil.

The proposed buffer tank-gas separator can be manufactured industrially, which is confirmed by the tests of the prototype, ongoing.

Using a buffer tank-gas separator allows you to comply with environmental safety and improve working conditions of staff, thereby increasing the culture of production.

Claims (1)

A buffer tank-gas separator containing a housing, an inlet guide box, an upper inlet and a lower outlet pipe and an external drip tray, characterized in that it is equipped with inclined separation shelves with thresholds and side guides, while the inclined separation shelves are made in the form of steps that expand as reduction.