RU2496549C1 - Device for degassing of substances - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and power engineering. Proposed device comprises vacuum tank 1 including gas-bearing matter feed pipe 19 and degassed matter discharge pipe 15 degassed matter flow control valve 10 arranged in said vacuum tank 1. Additionally, it includes intake tank 2 arranged under vacuum tank 1, feed valve 9 arranged in feed pipe 19, bypass valve 3 arranged between vacuum tank 1 and intake tank 1 to communicate therewith. Note also that vacuum tank 1 can be evacuated and supercharged via nipple 5 arranged at vacuum tank top section. Discharge pipe 15 is located at intake tank bottom section. Said degassed matter flow control valve 10 is composed of flat disc 10 arranged to be revolved by drive at vacuum tank top section. Both vacuum and intake tanks are equipped with appropriate level meters.

EFFECT: higher efficiency, power savings, simplified design.

6 cl, 3 dwg

Description

FIELD OF TECHNOLOGY

The proposed invention relates to the field of energy and engineering and can be used in complexes and systems where degassing of a substance is required.

BACKGROUND

A device for degassing a substance is known, including a vertical cylindrical body with a conical upper part, in which an inner chamber of an equidistant shape is coaxially mounted, forming an annular cavity together with the housing, an annular cavity communicating with a supply pipe under hot air pressure, and an inclined chamber with an inclined surface made with a hole in the bottom, in which a vertical pipe with holes and perforated plates are placed (see USSR author's certificate No. 1724311).

The main disadvantage of the invention according to A.S. USSR No. 1724311 is the low intensity of the degassing process.

In addition, there is known a device for removing gas from a liquid, including a contacting chamber, liquid and desorption gas inlet nozzles, a gas-liquid mixer and equipped with a preliminary degassing chamber mounted above the contacting chamber, a water seal connecting both chambers and a desorption gas extraction pipe connecting the contacting chamber to gas-liquid mixer (see USSR copyright certificate No. 1214141).

The disadvantage of this installation is the ineffective separation of the gas-liquid mixture due to non-optimal conditions for the processes of mass transfer of fluid flows and desorption gas.

The closest in technical essence to the proposed invention is a vacuum degasser according to as USSR No. 1223951, comprising a housing with a coaxially located central receiving pipe for supplying a substance intended for degassing, and peripheral conical plates, a pipe for removing the degassed solution, equipped with a corrugated shell with perforation and a cylindrical chamber.

The main disadvantages of this vacuum degasser are the high material consumption, the complexity of the manufacture of the degasser and the maintenance of the degassing process, as well as the high cost of manufacturing and the energy intensity of the degassing process.

The problem to which the invention is directed is to increase the efficiency of the degassing process, in particular, to improve the quality of degassing, to ensure continuity of degassing and ease of maintenance of the degassing process, as well as to reduce specific material consumption, simplify the design of the device and its manufacture, and therefore, to increase reliability the operation of the device as a whole.

SUMMARY OF THE INVENTION

This problem is solved due to the fact that the device for degassing, comprising a vacuum tank containing a supply pipe for supplying a gas-containing substance and a discharge pipe for discharging a degassed substance, and a gas-containing substance flow distributor located in the vacuum tank further comprises a receiving tank mounted under the vacuum tank ; a supply valve installed in the supply pipe; a bypass valve installed between the vacuum tank and the receiving tank and communicating with them, and the vacuum tank is made with the possibility of evacuation and pressurization through a nipple located in the upper part of the vacuum tank; a discharge pipe is located at the bottom of the premal tank; the gas-containing substance flow distributor is made in the form of a flat disk, rotatable by means of an electric drive, and is located in the upper part of the vacuum tank, and the vacuum and receiving tanks are each equipped with determining means for determining the level of degassed substance of the corresponding tank.

Due to the fact that the gas-containing substance flow distributor is made in the form of a flat disk, rotatable by means of an electric drive, and located in the upper part of the vacuum reservoir, the degassed substance is uniformly distributed by spraying it in a thin layer on the walls of the vacuum reservoir with subsequent draining of this substance into bottom of the vacuum tank. Under the action of vacuum and centrifugal force acting on the degassed substance, complete and rapid gas evolution from the substance occurs. Thus, an increase in the efficiency of the degassing process, in particular, an improvement in the quality of degassing, is ensured by ensuring the continuity of degassing and the ease of maintaining the degassing process. The continuity of degassing and its simplicity in the proposed device is provided not only by the features related to the substance flow distributor, but also by the totality of the distinguishing features. Along with the degassing efficiency, a simplification of the device’s design and its manufacture is also ensured with an increase in the reliability of the device as a whole, mainly due to the proposed mutual arrangement of valves, pipes and reservoirs, the possibility of evacuating or pressurizing the vacuum tank, and also due to the definitive means for determining in a vacuum and receiving tanks of the level of degassed substance.

In addition, in the device, the end of the supply pipe is directed towards the disk (10) and parallel to its plane.

This arrangement of the nozzle additionally ensures the degassing efficiency, since the jet of degassed substance enters the entire surface of the rotating substance flow distributor, thus spraying occurs from the entire surface of the disk.

Preferably, the bypass valve communicates with the vacuum and receiving tanks through the inlet and outlet, respectively.

Preferably, a drain valve and a tap are installed in the discharge pipe.

Preferably, the device according to the invention comprises pneumatic cylinders for controlling a supply valve, a bypass valve and a drain valve, respectively.

Preferably, the determining means are level sensors. Sensors provide an increase in the accuracy and objectivity of determining the level of a substance in tanks without visual monitoring of the level of a substance in tanks using human resources and without the influence of a human factor.

LIST OF GRAPHIC IMAGES.

Figure 1 shows the proposed device for degassing in longitudinal section along a vertical central axis;

figure 2 shows a General view of the proposed device for degassing;

figure 3 shows a top view of a device for degassing;

figure 4 shows a partial section of the proposed device along the line aa in figure 3.

DESCRIPTION OF THE INVENTION WITH REFERENCES TO THE DRAWINGS.

The degassing device includes a vacuum tank 1, in which degassing takes place directly, and a receiving tank 2, in which the degassed substance is collected, the degassed substance being a fluid. The tank 1 contains a supply pipe 19 for supplying a degassed substance to a tank 1. A supply valve 9 is installed in a supply pipe 19 and is designed to control the supply of a gas to be degassed into a tank 1. The tank 1 communicates with the tank 2 by the bypass valve 3. The bypass valve 3 is switched by pneumatic cylinder 4 .. By means of a nipple 5 installed in the upper part of the tank 1, the tank 1 is evacuated or pressurized in the range from minus 0.05 MPa (0.53 kgf / cm ² ) to 0.4 MPa (4 kgf / s m ² ), and the specified range is considered relative to atmospheric pressure. In the reservoir 1 there is a distributor of the degassed substance flow in the form of a disk 10, made for rotation by means of an electric drive 11. The end of the supply pipe 19 is directed towards the disk 10. With this arrangement of the pipe relative to the disk 10, a stream of degassed substance flows to the entire surface of the rotating disk 10, s which is spraying the substance onto the walls of the tank 1 with a thin layer.

In the device for degassing, it is possible to continuously supply air to the tank 2 under a pressure of 0.3 MPa (3 kgf / cm ² ) through the nipple 6. The tank 2 is equipped with a discharge pipe 15 for draining the degassed substance from the tank 2. In the discharge pipe 15 outside the tank 2 a drain valve 7 and a crane 8 are arranged in series for releasing out of the tank 2 degassed substances. The determinants for determining the level of degassed substance in tanks 1, 2 are level 12 sensors.

The working cycle of degassing substances in the proposed device for degassing has the following steps.

Stage 1. The gas-containing substance enters the pre-evacuated vacuum tank 1 through the supply valve 9, then it enters the disk 10 rotated by the electric drive 11. When the disk 10 is rotated, the degassed substance is sprayed onto the walls of the tank 1 with a thin layer, from which under vacuum, for example minus 0.05 MPa, dissolved gases are released. At the same time, a thin film of material flows into the lower part of the reservoir 1. The bypass valve 3 is closed at this time, and a constant air supply through the nipple 6 to the reservoir 2 is provided under a pressure of 0.3 MPa.

Stage 2. When the substance reaches the upper limit level in the tank 1 or the lower limit level in the tank 2, the supply valve 9 closes, and the bypass valve 3 opens, and instead of vacuum, a pressure of 0.4 MPa is created in the tank 1 by pressurization through the nipple 5, t. e. excess in relation to the pressure in the tank 2, i.e. 0.3 MPa. Thus, the degassed substance flows from the tank 1 to the tank 2. Under a pressure of 0.3 MPa in the tank 2, the degassed substance is continuously displaced from the tank 2 outward through the drain valve 7 and the valve 8.

Step 3. Then, when the substance reaches the lower limit level in the tank 1 or the upper limit level in the tank 2, the bypass valve 3 closes and the supply valve 9 opens, while a vacuum is created in the tank 1, for example, 0.05 MPa, and the degassing process the substance goes on.

If the substance reaches the upper limit level immediately in both tanks, then the supply valve 9 is closed and remains closed until the level of the substance in the tank 2 drops to the lower limit value, after which the degassing duty cycle resumes from step 2.

If the substance reaches the lower limit level immediately in both tanks, the drain valve 7 is closed to prevent air bubbles from entering the preparation material and remains closed until the substance level in the tank 1 reaches the upper limit level, after which the work cycle resumes from step 2.

In the stated degassing work cycle, the continuity of the process of removing gases from the substance is ensured. The use of the invention allows to increase the performance of the degassing device due to the continuity of the process, reduce energy costs and simplify the design.

Claims (6)

1. Device for degassing, comprising a vacuum tank (1) containing a supply pipe (19) for supplying a gas-containing substance and a discharge pipe (15) for discharging a degassed substance, and a distributor (10) of a stream of a gas-containing substance located in a vacuum tank (1) characterized in that it further comprises a receiving tank (2) mounted under a vacuum tank (1);
a supply valve (9) installed in the supply pipe (19);
a bypass valve (3) installed between the vacuum tank (1) and the receiving tank (2), and communicating with them,
moreover, the vacuum tank (1) is made with the possibility of evacuation and pressurization through a nipple (5) located in the upper part of the vacuum tank (1);
a discharge pipe (15) is located in the lower part of the receiving tank (2);
the distributor (10) of the flow of gas-containing substance is made in the form of a flat disk (10), made with the possibility of rotation by means of an electric drive, and is located in the upper part of the vacuum tank (1),
and the vacuum and receiving tanks are each equipped with determinants to determine the level of degassed substance in the respective tank. 2. The device according to claim 1, characterized in that the end of the supply pipe (19) is directed towards the disk (10). 3. The device according to claim 1, characterized in that the bypass valve communicates with the vacuum and receiving tanks through the inlet pipe (13) and the outlet pipe (14), respectively. 4. The device according to claim 1, characterized in that a drain valve (7) and a tap (8) are installed in the outlet pipe (15). 5. The device according to claim 1, characterized in that it contains pneumatic cylinders (4) for controlling the supply valve (9), the bypass valve (3) and the drain valve (7), respectively. 6. The device according to claim 1, characterized in that the determining means are level sensors (12).

Images