SU863636A1 - Device for gas distribution in liquid in microorganism culturing apparatus - Google Patents

Description

one

The invention relates to the field of mechanical engineering, in particular to a device for the distribution of gases in a liquid, mainly culture, used in apparatus for growing microorganisms, and can be applied in the microbiological and food industry.

The closest technical solution to the invention is a device for distributing gases in a liquid to a microorganism growing apparatus, comprising a turbine mounted on a vertical shaft, comprising conical plates with nozzles for introducing liquid and facing large bases with each other to form an annular slit for them ejection of fluid placed in the cavity between the plates distribution disc with radial vanes attached to the plates, and the aerator ij.

A disadvantage of the known device is the inadequate dispersion of air in the liquid.

The purpose of the invention is to increase the degree of air dispersion in a liquid.

This is achieved by the fact that in the proposed device for distributing gases in a liquid to a device for growing microorganisms, the aerator consists of annular collectors located around the turbine one above the other with a gap, and guide vanes fixed between the collectors, and on the surfaces of the collectors facing each other, there are openings for the passage of air, the turbine is positioned so that the annular gap is placed in the gap between the collectors, and the radial blades of the turbine in the liquid discharge zone are provided with Guides for separating fluid flow into separate jets.

In addition, the turbine is provided with a valve placed concentrically on the shaft and having air outlets from the internal space of the turbine, with fan locks installed at the top of the nozzle and the distribution disk of the turbine mounted on the nozzle.

FIG. 1 schematically shows a device for the distribution of gases in a liquid to apparatus for growing30 microorganisms, a general view in

cut; in fig. 2 shows section A-A in FIG. one.

The device contains a turbine, including cone-shaped plates 1 with nozzles for introducing fluid and a distribution disk 2 with radial vanes 3, and an aerator. The turbine is mounted on a vertical shaft 4, with cone-shaped plates 1 facing each other with large bases forming an annular gap between them 5 for ejection of liquid, and the disk 2 is placed in the cavity between the plates 1. The radial blades 3 of the disk 2 are attached to the plates.

The aerator consists of annular collectors 6 and 7, which are located around the turbine one above the other with a gap of 8, and guide vanes 9, which are reinforced between the collectors and have a triangular shape in cross section, one of whose vertices is directed at an angle to the vertical axis.

On the surfaces of the collectors 6 and 7 facing each other, there are openings 10 for the passage of air.

The turbine is located so that the annular gap 5 between the cone-shaped plates 1 is placed in the gap 8 between the manifolds 6 and 7 and provided with a pipe 11 having openings 12 for taking air out of the inner space of the turbine, and the nozzle 11 is concentric along the circumference of the annular collectors at an equal distance from each other.

In the upper part of the nozzle, fan blades 13 are mounted to suck air from the fluid entering the turbine.

The distribution disk 2 of the turbine is mounted on the pipe 11, and its radial blades 3 in the fluid ejection zone have guides 14 for dividing the fluid flow into separate jets.

The device works as follows.

The fluid is sucked in by the turbine and then directed at high speed into the gap 8 formed by ring headers 6 and 7. Air is supplied to the ring headers 6 and 7 and exits the liquid through the holes 10. In the gap 8 between the headers, the liquid mixes with gas. the interaction of moving at high speed and with a high frequency of pulsations of liquid and gas and the formation of fine gas bubbles and a developed specific contact surface gas. The fan blades 13 suck the air out of the liquid entering the turbine through the openings 12 of the nozzle 11, the density of the liquid increases and the degree of dispersion of gas bubbles increases.

The proposed device for distributing gases in a liquid to apparatus for growing microorganisms provides, in comparison with the known technical solution of the same problem, an increase in the degree of dispersion of air in the liquid and due to this intensification of mass exchange.

In addition, the proposed device allows to reduce the unit energy costs for mass transfer between the liquid medium and the gas and, thus, its costs for the cultivation of biomass.

Claims (2)

1. A device for distributing gases in a liquid to a device for growing microorganisms, containing a turbine mounted on a vertical shaft, including conical plates with nozzles for introducing liquid and facing large bases to each other to form an annular gap between them for ejecting liquid placed in the cavity a distributor disk with radial vanes attached to the plates and an aerator between the plates, characterized in that, in order to increase the degree of air dispersion in the liquid, The torus consists of annular collectors located around the turbine, one above the other with a gap, and guide vanes fixed between the collectors, while the surfaces of the collectors facing each other have openings for air passage, the turbine is positioned so that the annular slot is placed in the gap between the collectors, the radial blades of the turbine in the liquid discharge zone are provided with guides for dividing the fluid flow into separate jets. 2. Device POP.1, characterized in that the turbine is provided with a pipe placed concentrically to the shaft and having openings for taking air out of the internal space of the turbine, with fan blades mounted in the upper part of the pipe and the distribution disk of the turbine on the pipe. Sources of information taken into account in the examination 1. USSR author's certificate №414298. cl. From 12 to 1/10, 1971.