SU1000055A1 - Degassing apparatus - Google Patents

Description

(54) DEVICE FOR DEGASING LIQUID

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The invention relates to a technique for removing dissolved gas from a liquid and can be used in many industries, in particular in the chemical industry to remove dissolved gas from a solution before measuring its density.

A device for degassing a liquid is known, having a cylindrical container with openings for entering and exiting a liquid and an opening for outgoing gas, in which the spiral-shaped rotation of the liquid is carried out using a reflector and a stabilization plate located respectively in front of and above the inlet opening 1.

The reflector and stabilization plate complicate the design of the device, the shape of the container does not contribute to the formation of a funnel in the liquid. The fluid flow is twisted in the container as a result of striking the reflector and then on the internal wall of the container, as a result of which the liquid splashes and does not adhere tightly to the internal wall of the container during movement. This reduces the amount of gas from the liquid.

The closest in technical terms to the present invention is a device for degassing a liquid, containing a cone-shaped container, liquid inlet and outlet connections, and a lid with an opening for gas outlet in the center 2.

However, in the known device, the liquid enters the inner wall of the container, from a nozzle in the form of a jet with a relatively large cross-sectional diameter, as a result of which 10 it is unevenly distributed over E of the inner surface of the container.

In this case, the release of dissolved gas from the liquid is impaired. In addition, the gas outlet is located in the upper narrow part of the tank; therefore, the gas released from the liquid is not separated from it immediately, and, rising up to the outlet, again mixes with the rotating fluid flow moving downwards from the inlet nozzle. This makes it difficult to separate the gas from the liquid.

The purpose of the invention is to increase the degree of degassing of the liquid.

Claims (2)

This goal is achieved by the fact that a device for degassing a liquid containing a conical container, nozzles for entering and exiting a liquid and a lid are provided with a cylindrical and perforated cover arranged coaxially on the base of the cone, the liquid outlet nozzle is located at the bottom of the cylindrical shell the top of the cone, and is provided with a cylindrical sleeve with spiral grooves. In this case, it is advisable to make an angle, formed by a conical wall and horizontal, 1-2 ° larger than the angle formed by the direction of the spiral groove and horizontal, and the sum of the areas of the holes for the passage of fluid is 15-20 times more than the sum of the areas of the sections of the spiral channels and 4-5 times the sum of the areas of the holes for the passage of gas. FIG. 1 shows a device for degassing a liquid section; in fig. 2 - sleeve with spiral grooves, general view, (two grooves are shown on it for simplicity of drawing). The device consists of a container; I have a conic part 1 and a cylindrical part. 2. In the lower narrow part of the tank there is an inlet 3, into which sleeve 4 with spiral grooves is inserted. Two spiral grooves cut on the sleeve form two inlet openings 6 and two outlet openings 7. The cylindrical part is formed by a shell with rows of holes for the passage of fluid and the upper row of holes 9. for the passage of gas. At some distance from this shell, another cylindrical shell 10 of larger diameter passes. which is connected above and below with the first to form a closed annular space between them. In the lower part of the outer shell is placed a pipe 11 for the withdrawal of the degassed liquid. At the top of the device in the lid 12 there is a gas outlet 13. The degassing process in the device is as follows. The degassing liquid entering the pipe 3 through the inlets b enters the channels formed by the internal surface of the pipe and the spiral grooves 5 on the sleeve 4 inserted into the pipe. Thus, one common fluid flow is divided into several separate streams (in this case, two streams), which, passing through spiral channels in the nozzle one or two turns, acquire a steady rotational motion. The streams, exit from the OUTPUTS of the 7 spiral channels, immediately fall on the inner surface of the lower narrow part of the tank. The fluid under the action of centrifugal forces, as more severe, is pushed to the periphery, i.e., to the vessel wall, and the gas, more easily, accumulates in the central part of the vessel. After passing through the conical part of the tank, the liquid and gas, continuing to rotate, fall into its cylindrical part 2, where they are completely separated and withdrawn. The liquid under the action of centrifugal forces sprays out through the holes 7 and breaks up into small splashes against the outer cylindrical shell 10. The gas remaining in the liquid is released and rises immediately into the upper part of the closed annular space between the shell. A gas separated from the liquid in the center of the cylindrical part of the container is discharged through the opening 13 in the lid 12 at the top of the device. It is connected to it through the upper row of holes 9 of the gas. accumulating with the top of the closed annular space, and the degassed liquid collecting in the lower part of this space is discharged through pipe I. The use of a sleeve with grooves ensures a uniform distribution of the rotating liquid by a thinner layer over the entire inner surface of the container, and that the angle formed by the conical a wall and a horizontal greater than the angle formed by the direction of the spiral groove and the horizontal causes a tight junction of the liquid layers to the inner surface of the container. This facilitates the release of gas from the liquid due to centrifugal - The use of two cylindrical shells causes the additional separation of the gas remaining in the liquid and their complete separation. Observing the specified ratio between the cross-sectional areas of the channels, the openings for the passage of the fluid and the opening for the passage of the gas precludes the re-displacement of the released gas with the fluid. All this causes an increase in the degree of liquid degassing in the proposed device. The use of the proposed device, in comparison with the known, will allow to obtain an economic effect due to more complete removal of dissolved gases from liquids. In addition, the device is not difficult to manufacture, simple and reliable in operation. Claim 1. Device for degassing a liquid, containing a cone-shaped container, inlet and outlet nozzles and a lid with a gas outlet in the center, characterized in that, in order to increase the degree of liquid degassing, the device is provided coaxially arranged on the base of the cylindrical cone and perforated shells, the fluid outlet pipe is located in the lower part of qi