RU2394623C1 - Gas distributor - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention is intended for use in gas production, petrochemical industry and oil-and-gas-processing industry. Gas distributor is arranged inside apparatus housing opposite the gas inlet branch pipe with clearance relative to housing and represents hexagonal prism accommodating coaxially fitted inner cylinder with slots or perforation. Cylinder length is divided into sections by circular disks with hole diametres decreasing from gas inlet branch pipe. Prism lateral sides accommodate sets of corrugated sheets with their crimps made crossing. Space between hexagonal prism and inner cylinder can be filled with irregular packing.

EFFECT: uniform distribution of gas flow over apparatus section and higher quality of separation of finely dispersed flows.

2 cl, 3 dwg

Description

The invention relates to gas distributors used in gas separators for carrying out processes for separating a liquid phase from a gas and packed column apparatus for mass transfer processes in a gas-liquid system, such as rectification, absorption, and can be used in the gas, petrochemical and oil and gas processing industries.

A device for distributing gas and liquid flows over the cross section of the apparatus and separating the liquid from the gas stream, including a perforated shell mounted inside the apparatus against the gas inlet with a gap to the housing, blocked in the upper part by a partition, vertically oriented rows are placed on the shell against perforation porous volumetric elements overlapping the perforation channels, and the gap between the shell and the body and the top of the shell are covered by a half-deaf plate with nozzles for gas passage Connected to the interior of the shell.

Preferential execution:

the shell in the lower part is equipped with a water seal or partially blocked;

the shell is made of flat elements closed by the apparatus body (see RU Patent 2279302, IPC B01D 3/32, B01D 53/18 (2006.01), 2006).

The disadvantages of the known device are the increased hydraulic resistance of the device associated with the presence of a large number of local resistances, the insufficient degree of separation of finely dispersed flows, the bulkiness and increased material consumption, the complexity of manufacturing and installation.

Known gas distribution device designed to distribute gas flow over the cross section of the apparatus, and can be used in mass transfer, separation and filtration apparatus, made in the form of a cylinder with a perforated base and mounted inside the apparatus body eccentrically relative to its axis against the gas inlet with a gap to the apparatus body and the perforated base is located below the gas inlet pipe, a cylindrical shell is installed on the base, which is connected to the housing a town located above the gas inlet pipe, while the shell is made with channels having a variable cross-section for gas passage, decreasing to the axis of the gas inlet pipe.

Preferential execution:

the shell is made in a drop-shaped shape with an orientation of a sharp edge forming towards the gas inlet pipe and placed eccentrically relative to the apparatus axis; the shell at the gas inlet pipe is divided by a longitudinal partition, the ends of which are passed through opposite channels and flanged towards the gas inlet pipe (see RU Patent 1643030 A1, IPC B01D 3/20, 1991).

The disadvantages of this device are the insufficient degree of separation of fine flows, the complexity and cumbersome design of the device, the complexity of installation.

The closest in technical essence is a gas distribution device designed for uniform distribution of gas over the cross section of the apparatus, and can be used in packed column apparatus and in gas separators, which is equipped with a perforated base, the device is installed inside the apparatus body against the gas inlet pipe with a gap to the body, and the perforated base is located below the gas inlet pipe, the gas distribution device is made in the form of a triangular prism, on the side which blocks set of vertical corrugated sheets, the corrugations are arranged at an angle to the horizontal and the corrugations in adjacent sheets cross block formed (see. RU Patent 2329849, IPC V01D 3/00, B01D 3 // 32 (2006.01), 2006).

>40) в патрубке ввода газовой смеси, что связано с конструктивными особенностями устройства и вторичным диспергированием и уносом отсепарированных дисперсных частиц.The disadvantages of the device are the uneven distribution of the gas stream over the cross section of the apparatus and the insufficient degree of separation of finely dispersed flows at high values of the velocity factor (w

> 40) in the inlet port of the gas mixture, which is associated with the design features of the device and the secondary dispersion and entrainment of the separated dispersed particles.

The objective of the invention is the uniform distribution of the gas stream over the cross section of the apparatus and improving the quality of separation of finely dispersed streams at high values of the velocity factor in the inlet of the gas mixture.

The technical problem is solved in that the gas distribution device installed inside the apparatus body against the gas inlet pipe with a gap to the housing and made in the form of a polygonal prism, on the sides of which are installed blocks of corrugated sheets, the corrugations of which are adjacent in the cross sheets, the device is made in the form a hexagonal prism, which has a coaxially located inner cylinder having slots or perforations, the cylinder is divided into sections by annular disks with hole diameters, enshayuschimisya of the gas injection nozzle.

A preferred embodiment when the space between the hexagonal prism and the inner cylinder is filled with an irregular nozzle.

The solution to the technical problem improves the uniformity of the distribution of the gas phase over the cross section of the apparatus and improves the quality of the separation of finely dispersed flows at high values of the velocity factor in the inlet port of the gas mixture.

Figure 1 shows a view of the gas distribution device from the side of the gas inlet pipe, figure 2 shows the gas distribution device in a perspective view, figure 3 shows the gas distribution device in the apparatus.

The gas distribution device is made in the form of a hexagonal prism 1 and is installed against the gas inlet pipe 2 with a gap to the apparatus body 3, blocks 4 of corrugated sheets 5 are installed on the sides of the prism, the corrugations of which are adjacent in the adjacent sheets, the hexagonal prism has a coaxially disposed inner cylinder 6 having gaps or perforations 7, the inner part of the cylinder is divided into sections 8 by annular disks 9 with hole diameters decreasing from the gas inlet section along the length of six with a prism and an inner cylinder when predominantly filled with an irregular nozzle 10.

The proposed gas distribution device operates as follows.

The gas phase with the dispersed particles contained therein is fed radially through a gas inlet 2 to a gas distribution device, the casing of which is made in the form of a hexagonal prism. A gas stream with a high value of the velocity factor through the gas inlet pipe 2 is fed into a gas distribution device, where it enters sections 8 of the coaxially located inner cylinder 6, formed by annular disks 9 with hole diameters decreasing from the gas inlet pipe. Further, the flow through slots or perforations 7 of the inner cylinder 6 passes into blocks 4 made of corrugated sheets 5, the corrugations of which in adjacent sheets are made crosswise. The edges of the corrugated sheets 5 separate the gas flow at the inlet of the blocks into separate jets, which, passing between the sheets, flow around the corrugations, under the action of inertial forces on the surface of the sheets, dispersed particles are deposited and a liquid film forms, which flows down under the action of gravitational forces.

In sections 8, due to the annular disks 9 with hole diameters decreasing from the gas inlet pipe 2, the gas velocity profile is aligned, and the prismatic shape of the switchgear allows you to evenly distribute the gas flow over the cross section of the apparatus 3. The large passage section of the blocks 4 significantly reduces the gas velocity factor , which prevents the secondary dispersion of the liquid film formed on the corrugated sheets and improves the quality of the separation of fine particles.

In the case of filling the space between the hexagonal prism and the inner cylinder with an irregular nozzle 10, a more uniform distribution of the gas flow occurs. In this case, under the action of inertial forces on the surface of the packed elements, dispersed particles are deposited and a liquid film is formed, which flows down under the action of gravitational forces.

The device is easily mounted from components, which allows you to feed it into the device through the hatch and install the device in new and existing devices.

Thus, the inventive design of the gas distribution device allows you to evenly distribute the gas stream and improve the quality of the separation of fine particles of liquid with large values of the velocity factor by leveling the velocity field of the gas stream and reducing its speed at the outlet of the device due to a significant increase in the deposition surface and the bore of the gas device flow.

The inventive facility has passed industrial tests in a gas separator and has shown good results.

Claims (2)

1. A gas distribution device installed inside the apparatus body against the gas inlet pipe with a gap to the body and made in the form of a polygonal prism, on the sides of which blocks of corrugated sheets are installed, the corrugations of which are adjacent in the corrugated sheets, characterized in that the device is made in the form a hexagonal prism, which has a coaxially located inner cylinder having slots or perforations, the cylinder is divided into sections by annular disks with hole diameters decreasing from the gas inlet pipe. 2. The gas distribution device according to claim 1, characterized in that the space between the hexagonal prism and the inner cylinder is filled with an irregular nozzle.

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