SU808090A1 - Heat-mass-exchange tray - Google Patents

Description

(54) HEAT AND MASS EXCHANGE PLATE

I

The invention relates to heat and mass transfer apparatus, specifically in the dehydration of natural gas with a liquid sorbent (diethylene glycol) in devices called absorbers, and can be used in the gas and oil producing industries.

A known heat and mass transfer plate comprising a horizontal base, a contact device made in the form of a hollow cylinder fixed at the base, a tube for supplying liquid to the input and output ends connected to the contact device and a drain pipe fixed at the base 1.

However, in the well-known plate, heat and mass transfer is not intensively carried out, which leads to high specific consumption of the liquid sorbent and low productivity.

The purpose of the invention is to intensify the process of heat and mass transfer by increasing the surface of contact and improving the separation of the phases.

This goal is achieved by the fact that the plate is equipped with a diffuser installed inside the cylinder and a cylindrical shell located coaxially outside the cylinder with a flange bent inside the end entering the diffuser, and the inlet and outlet ends of the tube for supplying liquid are located respectively in the lower part of the base and along the axis of the contact device inside the diffuser.

In addition, the plate is equipped with a screw swirl closed on the tube for supplying fluid inside the cylinder.

The drawing shows a heat and mass transfer plate.

The proposed plate is installed in the column housing 1, of an arbitrary cross section and includes a horizontal sheet 2 with one or several contact devices 3 and a drain pipe 4.

Claims (2)

The contact device 3 consists of a diffuser 5 installed inside the cylinder 6, a cylindrical shell 7 with an end flanged inwardly located coaxially outside the cylinder 6, a liquid supply pipe 8 whose inlet and outlet ends are located respectively in the lower part of the base and along the axis of the contact device 3 inside the diffuser 5, the screw swirl 9 and the mounting ribs 10. The contact device 3 is a device that ensures the contact of the absorbent with water vapor of the gas flow and is separated no last. The smallest diameter of the diffuser 5 and the upper edge of the tube for the supply of fluid 8 is set at the level of the upper edge of the drain pipe 4. The cylinder b in the upper part has an extension (socket). The smaller opening of the cylindrical shell 7 should be equal to the flow area of the cylinder 6 (before the socket). The shell 7 with the bell of the cylinder 6 is installed with a gap. The position of the shell 7 is fixed with the help of the installation ribs 10. The proposed plate works as follows. The liquid level on the plate is determined by the height of the rise of the drain pipe 4. The height of the pipe 4 is governed by the frequency of fluid circulation. In an idle plate, the fluid level in the fluid supply tube 8 (ejection tube) is at the height of the discharge pipe 4. The gas flow moves in the cylinder 6 through the screw swirl 9. The gas flow, having a rotational motion, passes the diffuser 5c with an increased speed under reduced pressure. Due to this, the absorbent from the ejection tube 8 enters the gas flow and under the action of centrifugal forces it moves from the center to the rierifuge through the entire mass of gas, coming into contact with the water, vapor in the gas and absorbing them. Due to the difference in specific gravities of the liquid phase and gas and centrifugal forces in a rotating gas flow, they are separated. The fluid, pressing against the wall of the cylinder 6 of the contact device 3, rises up and in the gap formed by the cylindrical shell 7 and the bell of the cylinder 6, flows down to the horizontal base 2, and the gas enters the socket of the cylindrical shell 7 and rises up. The excess liquid from the sheet 2 is discharged through pipe 4 to the bottom plate. As the gas flow rate increases, the contact between the gas and the absorbent improves, and the degree of separation also improves. With the proposed plate design, the range of gas flow rates is increased. The proposed plate design is most productive as compared to the known one with a lower specific consumption of absorbent. It works on the basis of the properties of the movement of heavier substances from the center to the periphery in a circular motion of the gas flow. This provides the best contact of the absorbent (for example, DEG with water vapor and their binding), as well as the separation of liquid from gas. All this contributes to a better gas drainage and the release of heavy hydrocarbons from the gas with a lower specific consumption of the absorbent. Claim 1. Heat and mass transfer plate, comprising a horizontal base, a contact device made in the form of a hollow cylinder fixed in the base, a tube for supplying liquid to the input and output ends, connected to the contact device and a drain pipe fixed in the base, characterized by that, in order to intensify the process of heat and mass transfer by increasing the contact surface and improving the separation of the phases, the plate is equipped with a diffuser installed inside the cylinder and located paraxial cylindrical outside the cylinder mantle into the interior of flanged end, the incoming into the diffuser, and the inlet and outlet ends of the tubes for supplying fluid placed respectively at the bottom of the base and on the contact device inside the diffuser axis. 2. A plate according to claim 1, characterized in that it is provided with a screw swirler attached to a tube for supplying liquid inside the cylinder. Sources of information taken into account in the examination 1. Japanese patent number 201, 1962.