SU840103A1 - Method of foam damping in fermentizers - Google Patents

Description

separation and removal of fluid and ase communicated with the separation cavity to form a closed compass ion circuit in such a way that the outlet of the tank is located in the socket of the chamber.

In this case, the separation tank is made in the form of a truncated cone placed in the housing with the formation of an annular gap, connected to the separation chamber by a large base, in the walls of which there are holes for liquid and gas to enter the annular gap and internal and external inclined plates located near them, moreover, the direction of the inner plates corresponds to the direction of the foam movement, and the housing has a nozzle for gas outlet and a pipe for returning the liquid to the fermenter. FIG. 1 schematically depicts the proposed device, a longitudinal section in expanded form; in fig. 2 is the same, in plan view, in FIG. 3 shows the construction of a separation tank; FIG. 4 a device for large-sized apparatus, equipped with several nozzles and foam inlets, plan view.

A device for extinguishing foam in fermenters contains a gas supply nozzle 1 installed coaxially with a horizontally arranged cylindrical separation chamber 2, having a bell 3 for introducing a leg. The device is equipped with a tubular separation tank 4 for further separating the foam and draining liquid and gas in communication with the separation chamber 2 with the formation of a closed circulation circuit in such a way that the outlet opening of the container 4 is located in the socket 3 of the chamber 2.

The separation tank 4 is made in the form of a truncated cone 6 placed in the body 5, reinforced with the formation of an annular gap 7 between their walls and connected to the separating frame 2 large. the base. In the walls of the truncated cone 6, holes 8 are made to allow liquid and gas to enter the annular gap 7. Susolo holes 8; At least in the upper part of the container 4 there are internal and external sloping plates 9, which prevent the liquid droplets from being carried away with the gases removed from the separation tank 4. In this case, the direction of the inner plates 9 corresponds to the direction of the foam movement along the contour. Case 5 has-in

the upper part of the nozzle 10 for the gas outlet, and in the lower part - the pipe 11 for returning the liquid to the lower zone of the fermenter.

In large-ix apparatus, the defoaming device may be equipped with several sockets 3 for foam entry and, accordingly, several nozzles 1 and separation tanks 4.

The device works as follows.

As soon as the frothed culture liquid rises above the level of the device, turn on the gas supply to the nozzle 1. Coming from. gas nozzles 1 suck foam through a socket 3 into separating chamber 2, where under a dynamic pressure gas jets foam bubbles burst and released gases together with liquid droplets are ejected into separation tank 4. Due to a sharp change in speed in the expanded section of separation tank 4 droplets liquids fall out of the stream, through the holes 8 flow into the lower part of the housing 5 and further through the pipe 11 are discharged into the lower part of the fermenter. The gas flow, compressed by the conical narrowing of the separator tank 4, also through the openings 8 is discharged into the annular gap 7 of the housing 5 and is discharged through the nozzle 10 into the gas space of the fermenter, from which it is removed together with the exhaust gases. Due to the fact that the holes 8 by means of the plates 9 are oriented along the flow of the foam, droplets of liquid, which follow along the straight line, do not fall into the holes, but are deposited on the walls, while gas particles, which are lighter, bend around the edges of the hole and The gap 7, if any, is left in the gap 7. The remaining liquid droplets are released from the outlet of the separation chamber and flow directly into the socket 3, not out of the foam quencher. By adjusting the air supply to the nozzle 1, you can increase or decrease the foam volume from the apparatus.

Due to the design of the device in the form of a closed loop and the presence of the separation tank 4, the overshoot of the outstanding foam and the secondary saturation of the surrounding volume of the foam with liquid are eliminated, which ensures a higher effective damping of the foam. Claim 1, A device for quenching foam in fermenters, comprising a nozzle for gas supply, installed coaxially with a horizontally arranged cylindrical separation chamber, having a socket for introducing foam, which in order to increase the effectiveness of defoaming by preventing secondary moisture saturation of the foam and penetration of the non-enriched foam; it is equipped with a tubular separation tank for additional separation and removal of liquid and gas communicated with the separation chamber to form a closed -, of the circulation circuit in such a way that the Outlet of the tank is located in the socket of the chamber.

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36 2. The device according to claim 1, characterized in that the separation tank is designed as a truncated cone placed in the housing with the formation of an annular gap connected to the separation chamber by a large base, in the walls of which there are holes for the liquid to reach the gas into said annular aeatyp located They are surrounded by internal and inclined inclined plates, the direction of the internal plates corresponds to the direction of foam movement, and the casing has a nozzle for gas outlet and a pipe for returning liquid to the fermenter. Sources {formalities taken into account during the examination 1. USSR author's certificate N9 462595, cl. On 01/19/02, 1973.

Claims (2)

Claim 1. A device for extinguishing foam in fermenters, comprising a gas supply nozzle mounted coaxially with a horizontally arranged cylindrical separation chamber having a bell for introducing foam, characterized in that, in order to increase the efficiency of defoaming by preventing '<secondary moisture saturation and foam slip outstanding foam, it is provided with a tubular separation vessel for further separation and removal of liquid and gas communicated to a separating cam · ¹⁵ tion to form a closed .togo Circulation ion circuit so that the outlet of the container is placed in the socket of the chamber. 2. The device pop. 1, characterized in that the separation tank is made in the form of a truncated cone placed in the housing with the formation of an annular gap, connected to the separation chamber by a large base, in the walls of which there are openings for the exit of liquid and gas into the specified annular gap and the inner and outer inclined ones located near them plate, and the direction of the internal plates corresponds to the direction of movement of the foam, and the body has a pipe for the exit of gas and a pipe for returning the liquid to the fermenter.