SU1693036A1 - Device for foam quenching - Google Patents

Abstract

The invention relates to devices for degassing a gas-liquid mixture and can be used in the food, microbiological and other industries. The aim of the invention is to increase productivity and reduce the consumption of chemical antifoam agent. The defoaming device comprises a cylindrical horizontal body 1 with a nozzle 2 for supplying foam and a nozzle 3 for evacuating gas. The housing is divided by transverse partitions into three communicating chambers 4-6 for pre-defoaming, separating gas from liquid and evacuating gas. In each chamber, blades are fixed on a common drive shaft 7. The gas-liquid separation chamber 5 is divided into two sections by an annular partition 8. Blades 9 and 10 are placed in each section. Annular discs 11 and 12 with a central hole are located on each side of the blades 9, and circular discs 13 and 14 are located on the sides of the blades 10. The blades 15 and 16 are attached to the disks 12 and 14; The nozzles 17 and 18 for removing the degassed liquid are connected to each of the indicated sections. The blades 19 in the pre-defoaming chamber are perforated. 5 il. with C

Description

AiV-i i

Och

yu so

about

with about

-4-4 -4-1 7 T in g

Fig

The invention relates to devices for degassing a gas-liquid mixture and can be used in the food, microbiological and other industries related to the processing of foam solutions.

The aim of the invention is to increase productivity and reduce the consumption of chemical antifoam agent.

Figure 1 shows the device, a General view in longitudinal section; figure 2 - section aa in figure 1; on fig.Z - section bb in fig, 1; nafig.4- section bb in figure 1; figure 5 - section GG in figure 1.

The defoaming device comprises a cylindrical horizontal body 1 with a nozzle 2 for supplying foam and a nozzle 3 for evacuating gas. The body is made of welded structures connected by stud bolts and divided by transverse partitions into three communicating chambers for pre-defoaming 4, separating gas from liquid 5 and venting gas 6. The chambers are located one after the other, in each chamber on a common drive shaft 7 the blades are fixed . The chamber 5 for separating gas from the liquid is divided into two sections by an annular partition 8. Blades 9 and 10 are placed in each section. Annular discs 11 and 12 with a central hole are placed on each side of the blades 9, and circular discs 13 and 14 are located on the sides of the blades 10 center hole. Blades 15 and 16 are attached to disks 12 and 14. Nozzles 17 and 18 are tangentially arranged to drain degassed liquid and connected to each of the sections indicated.

In the pre-defoaming chamber 4, the blades 19 are perforated. Chamber 6 is separated from chamber 5 by an annular partition 20. In chamber 6 for evacuating gas on the drive shaft 7, the blades 21 are fixed.

The defoaming device operates as follows.

The gas-liquid mixture from the apparatus (for example, a yeast-growing plant) continuously enters the device through the nozzle 2 into the inter-blade ducts in the chamber 4 of the pre-defoaming agent, and the chemical defoamer is supplied here. Blades 19, 9, 10 and 21 are driven into rotation by an electric motor. As a result of centrifugal forces, the gas-liquid mixture is separated into liquid and gas. Fluid having a higher density is discarded to the periphery of the rotating blades 19 into the zone of the blades 15, then is led out through the pipe 17 from the device. Essential for

the degassing of the gas-liquid mixture in the chamber 4 has perforations of the blades 19, through which the chemical antifoam is finely distributed in the gas-liquid mixture.

Thus, the gas-liquid mixture in the chamber 4 under the action of the blades 19 is simultaneously exposed to the following destructive factors: centrifugal due to the difference in specific gravity

0 liquid and gas; chemical due to the effect of the defoaming emulsion on the gas bubbles.

In addition to one another, these factors make it possible to more effectively destroy highly stable yeast foams.

The gas with foam is placed around shaft 7

and through the central hole in the annular

the disk 11 passes also in the section of the camera 5,

where, under the action of the blades 9, an intermediate separation of the foam occurs. The liquid from the section is discharged through the pipe 17.

The main separation of the foam from the gas occurs during the movement of the gas along and around the shaft of the drive shaft 7 in the next section of chamber 5. Here the final degassing of the gas-liquid mixture takes place. The fluid under the action of centrifugal force is thrown to the periphery, then using

The blades 10 and the blades 16 enter the pipe 18 and are removed from the device.

The gas flows continuously through the central holes of the annular disks 11-14 into the chamber 6. The blades 21 create around the shaft

5 7 negative pressure, which exposes the gas-liquid mixture to the third destructive factor: vacuum, by creating blades 21 of negative pressure in chamber 5 around shaft 7. Gas from chamber 6

0 is removed via nozzle 3 to atmosphere.

The liquid phase is sent to the product line for further processing (separation, thermolysis, drying).

The proposed device has more

5 a high degree of utilization of the chemical defoamer, which allows to reduce its consumption and ensure good operation of the device at the boundary conditions, especially during the processing of defective, heavily feedstock. The design features of the device make it possible to increase its performance due to a more complete separation of gas from liquid,

Claims (1)

Invention Formula five . A defoaming device containing a cylindrical horizontal body with a pipe for supplying foam and pipes for discharging degassed liquid and gas, divided by transverse partitions into three communicating successively located pre-defoaming chambers, gas separation from liquid and gas exhaust, each of which contains blades mounted on a common drive shaft, due to the fact that, in order to increase productivity and reduce the consumption of chemical antifoam agent, about five tiL o " : h separation of gas from liquid is divided into two sections by an annular partition, the blades of this chamber are placed in each section, and the nozzles for draining the degassed liquid are connected to each of the sections, while the blades in the pre-defoaming chamber are made perforated 15 nineteen P FIG. I 91 S 91 9-9 9еОЈ691. Ј $ gd eleven FI.5