RU2540567C1 - Gas scrubber - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: gas scrubber comprises the housing with mix supply branch pipes, outlet for separated phases located inside the housing behind the inlet branch pipe for input initial gas -liquid mix of volumetric gas distribution device, and the separation mounting attachment in its upper part. The gas distribution device is designed V-shaped with the perforated channels for passing of the separated mix, scrubbed gas and selection of the separated admixes. The upper part of the V-shaped gas distribution device is designed as a tray with the displaced to each other rows of holes located in its opposite edges, protruding outside the V-shaped housing, with installed in them or under them vertically oriented porous volumetric structures. The vertically oriented porous volumetric structures are placed against each perforated channel for mix passing in the side walls of the V-shaped gas distribution device. Above the tray a liquid sprinkler fitted with the disconnecting device is installed.

EFFECT: improvement of efficiency of separation of finely dispersed drops of liquid and flour particles of hard admixes without increase of separator dimensions.

2 cl, 5 dwg

Description

The invention relates to the field of oil and gas and chemical engineering, in particular to separation and filtration devices. It can be used in the processes of separating liquids and solids from a gas stream, mainly in installations: preparation of natural and associated gas; low temperature gas separation; gas condensate processing; gas compression, including for air purification of gas turbine units; absorbers for drying and purifying gas from impurities and other processes.

A gas distribution device is known (RF Patent No. 1643030, IPC: B01D 3/20, priority 03/31/1989), designed for gas separators and mass transfer apparatuses and including an apparatus casing with a casing installed therein with a clearance installed against the gas inlet pipe and made with channels for the passage of gas, the cross section of which decreases to the inlet pipe. The device allows to reduce the height of the apparatus, as the separation of the separated stream occurs directly against the inlet pipe, and the separation is carried out directly in the shell, for example, on a mesh chipper located above the inlet pipe.

The disadvantage of this device is:

- insufficient separation efficiency, because the final separation device is installed on the shell, the area of which is less than the area of the apparatus body, and the separation of the distribution unit is low, because the entrance of the entire gas mixture is made directly to the wall of the shell of the distribution unit, which leads to additional crushing of the liquid;

- the working element for separation is the inner wall of the apparatus body, which in the presence of mechanical impurities is subject to erosion (thinning), for example, by sand particles coming from the well with gas;

- significant hydraulic resistance of the switchgear from the impact of the incoming stream on the walls of the shell.

Known technical solutions for gas separation using washing liquid, for example, according to RF patent 965486 A1 IPC ⁵ : B01D 53/26, according to which a separator is used to separate liquid from gas, then a washing section is used in a subsequent apparatus in a chain, after which separation a washing liquid collection section mounted above the washing section.

The disadvantages of these technical solutions are the significant dimensions of the separation equipment, their complexity and metal consumption.

Known gas separator according to the patent of the Russian Federation No. 2385756 C1, IPC 45/04 (prototype), comprising a housing with nozzles for the inlet of the mixture, the output of the separated phases and a separation nozzle located inside the housing and a gas distribution device made in the form of a perforated wedge-shaped housing with channels for passage of the separated mixture, purified gas and selection of separated impurities and installed with a gap to the housing opposite the nozzle of the mixture inlet, moreover, it is made with an open base and a top, and an open base of a wedge-shaped body CA forms passages for recirculation gases with the inlet of the separated mixture inlet, and the open top of the wedge-shaped body is fixed in the drainage gutter or located directly in the liquid collector. In this device, separation and distribution of flows is carried out directly against the mixture inlet fitting, i.e. practically the device does not increase the height of the device.

The disadvantage of this device is:

- insufficient separation of fine liquid droplets, for example, drops of aqueous solutions containing dissolved salts, causing problems in the form of salt deposits on compressor machines when heating gas;

- insufficient separation of dust particles of solid impurities.

The technical result consists in increasing the efficiency of the separation of fine liquid droplets and dust particles of solid impurities, while maintaining the dimensions of the separator.

The technical result is achieved in that in a gas separator with flushing, comprising a housing with mixture inlet nozzles, separated phase outlets located inside the housing behind the inlet of the initial gas-liquid mixture of the volumetric gas distribution device, made wedge-shaped with perforated channels for the passage of the separated mixture, purified gas and selection separated impurities, and in its upper part of the separation nozzle, the upper part of the wedge-shaped gas distribution device is made in the form of a pan with displaced relative to each other by rows of holes located in its opposite edges, protruding beyond the wedge-shaped body, with vertically oriented porous volumetric structures installed in or below them, placed against each of the perforated channels for passage of the mixture of the side walls of the wedge-shaped gas distribution device, a liquid sprinkler equipped with a disconnecting device is installed in the pan.

Irrigated rows of vertically oriented porous volumetric structures are arranged alternately with non-irrigated vertically oriented porous volumetric structures.

The implementation of the upper part of the wedge-shaped gas distribution device in the form of a pallet with rows of holes displaced relative to each other, located in its opposite edges, protruding beyond the wedge-shaped body, installing vertically oriented porous volumetric structures in them or below them, placing them against each of the perforated passageways for passage mixtures of the side walls of the wedge-shaped gas distribution device, and the installation of a fluid over the drip pan equipped with m apparatus allows:

- increase the efficiency of separation of liquid and impurities from the gas stream, due to the two-stage highly efficient separation of the mixture initially on a volumetric gas distribution device, and then on vertical alternating volumetric structured elements that are installed behind the gas distribution device against the channels for the passage of the mixture, practically without increasing the dimensions of the separator itself;

- increase the efficiency of separation of liquid and impurities from the gas stream, due to the location of volumetric structured elements in the openings of the sump of the gas distribution device, by irrigating them with the liquid entering the sump from the liquid sprinkler installed above it.

The location of the irrigated rows of vertically oriented porous volumetric structures in turn with non-irrigated vertically oriented porous volumetric structures allowed to further increase the efficiency of separation of liquid and impurities from the gas stream.

The applicant and the authors are not aware of gas separators with flushing, in which an increase in the separation efficiency would be achieved by the technical solution proposed by the authors.

The figure 1 shows a General view of the gas separator with flushing.

Figure 2 is a section A-A in figure 1.

Figure 3 is a section A-A in figure 1 (with two non-irrigated vertically oriented porous volumetric structures).

Figure 4 is a side view B of figure 3.

The figure 5 shows in isometric volume wedge-shaped casing of a gas distribution device.

The gas separator with washing consists of a housing 1 (Fig. 1) with nozzles for the inlet of the gas-liquid mixture 2, the outlet for the purified gas 3, the outlet for the liquid with impurities 4, the separation nozzle 5 in its upper part, the liquid collector and mechanical impurities 6, the volume wedge-shaped body of the gas distribution device 7, two opposite walls 8 of which are made with perforated channels 9 (FIGS. 2, 3, 5), for example, blinds, and the bottom wall 10 (FIGS. 2, 3, 5) is blind. The upper part of the volume wedge-shaped body of the gas distribution device 7 is made in the form of a pallet 11 (Fig. 5) with holes 12 arranged in rows at opposite edges of the pallet 11, protruding beyond the wedge-shaped body of the gas distribution device 7. Against each of the perforated channels 9 (Fig. 2, 3, 5) for the passage of the mixture of the wedge-shaped body of the gas distribution device 7, vertically oriented porous volumetric structures 13 are installed (Figs. 2, 3, 4) in the form of alternating elements located in the openings tiyah 12 (Figure 5) or pallet 11 beneath them (Figure 4), the tray 11 is mounted over the irrigation fluid 14 (Figures 1, 4) provided with a tripping device 15 (Figure 1).

Irrigated rows of vertically oriented porous volumetric structures 13 are arranged alternately with non-irrigated vertically oriented porous volumetric structures 16 (FIGS. 2, 3, 4).

The body of the volume wedge-shaped gas distribution device 7 is equipped with a pipe for the selection of impurities 17 (Fig.1-5).

The device operates as follows.

The gas-liquid mixture with impurities is fed through the inlet pipe 2 (Figs. 1-4) into the gas distribution device 7, where, using inertia forces or a combination of inertia and centrifugal forces, the impurities are separated and removed into the fluid and mechanical impurities collector 6 (Fig. 1) through the pipe the selection of impurities 17, and then through the outlet pipe of the liquid with impurities 4 is selected from the housing 1 of the separator. The pre-cleaned gas stream from the volumetric gas distribution device 7, using forces from the pressure drop inside and outside the device, is sent through two opposite walls 8 (Figs. 2, 3, 5), with perforated channels 9, to vertically arranged behind them in the form of alternating elements oriented porous volumetric structures 13 and 16 (FIGS. 2-4), on which the separated gas from salts and impurities is additionally washed with a liquid, which is supplied to vertically oriented porous volumetric structures 13 through openings 12 (Fig. 5), made in rows at opposite ends of the pallet 11 protruding beyond the wedge-shaped housing of the gas distribution device 7, for this purpose, a fluid sprinkler 14 (Figs. 1, 4) equipped with a disconnecting device 15 (Fig. 1) is installed above the pallet 11. The collection of the separated impurities through the sampling pipe 17 and the collection of washing liquid can be carried out in different compartments of the fluid collector and mechanical impurities 6 (not shown in Fig. 1). The final separation of the gas stream occurs on the separation nozzle 5 (figure 1), after which the gas is discharged through the outlet pipe of the purified gas 3.

Thus, the implementation of the upper part of the wedge-shaped gas distribution device in the form of a pan with rows of holes displaced relative to each other located in its opposite edges and protruding beyond the wedge-shaped body, the installation of vertically oriented porous volumetric structures in these holes or below them, and placing them against each from perforated channels for the passage of the mixture of the side walls of the wedge-shaped gas distribution device, the installation of a liquid over the drip tray a bridge equipped with a disconnecting device, as well as the location of the irrigated rows of vertically oriented porous volumetric structures in turn with non-irrigated vertically oriented porous volumetric structures, significantly increased the efficiency of separation of the gas-liquid mixture.

Claims (2)

1. A gas separator with flushing, including a housing with nozzles for the inlet of the mixture, the output of the separated phases located inside the housing for the inlet of the initial gas-liquid mixture of the volumetric gas distribution device, made wedge-shaped with perforated channels for the passage of the separated mixture, purified gas and selection of separated impurities, and the upper part of the separation nozzle, characterized in that the upper part of the wedge-shaped gas distribution device is made in the form of a pan with offset relative but to each other by rows of holes located in its opposite edges, protruding beyond the wedge-shaped body, with vertically oriented porous volumetric structures installed in them or below them, placed against each of the perforated channels for passing the mixture of the side walls of the wedge-shaped gas distribution device, while above the pallet a fluid sprinkler equipped with a disconnecting device is installed. 2. The gas separator with washing according to claim 1, characterized in that the irrigated rows of vertically oriented porous volumetric structures are arranged alternately with nonirrigated vertically oriented porous volumetric structures.

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