SU1521498A1 - Aerator - Google Patents

Abstract

The invention relates to devices for aeration and mixing of liquid in apparatus for growing microorganisms and can be used in the microbiological industry. The aim of the invention is to increase the ejection ratio. Preferably, the aerator for the microorganism growing apparatus contains a cylindrical receiving chamber 1, a mixing chamber 2 made in the form of a truncated cone, the upper part of which with a large base is located in the receiving chamber with the formation of an annular pocket 3. A branch pipe 4 for supplying liquid and in the upper part - a pipe 5 for supplying the ejected gas. The aerator is provided with a pipe 6 for the additional ejection of gas into the lower part of the mixing chamber, which is installed coaxially with the chambers and the nozzle 5 for the supply of gas. The pipe on the outer surface has a spiral 7 located in the gap between the walls of the pipe and the mixing chamber. 1 il.

Description

ate yu

four

SS oo

) f (u3irecfat

The invention relates to devices for aerating and mixing liquids primarily in apparatus for growing microorganisms and can be used in the microbiological industry in the production of protein-vitamin concentrates.

The aim of the invention is to increase the ejection ratio.

The drawing shows the aerator, a longitudinal section.

Preferably, the aerator to the microorganism growing apparatus comprises a cylindrical receiving chamber 1, an offset chamber 2, made in the form of a truncated cone, the upper part of which with a large base is located in the receiving chamber with the formation of an annular pocket 3. A branch pipe for supplying liquid is placed and in the upper part - a pipe 5 for supplying the ejected gas. The aerator is equipped with a pipe 6 for additional ejection of gas into the lower part of the displacement chamber 2, mounted with the chambers and the spout bku 5 for gas supply. At the same time, the pipe on the outer surface has a spiral 7 located in the gap between the walls of the pipe and the displacement chamber 2.

The aerator works as follows.

Using a pump, the culture fluid is fed through the nozzle k into the receiving chamber 1. The liquid rises along the annular pocket 3 to the upper edge of the mixing chamber 2 and flows through it into the mixing chamber 1, thus forming a funnel into which the gaseous medium enters through the nozzle 5 receiving chamber 1. The flow rate of the fluid supplied to chamber 1 and the fluid flowing out of chamber displacement 2 is kept equal so that a constant layer of height is located above the upper base of the mixing chamber dkkosty, providing education of a stable funnel. When the jet of liquid flows in a spiral 7 into the gaps between the walls of the pipe 6 and the mixing chamber 2, it twists and increases its speed from the mixing chamber. Due to this, a vacuum is created at the outlet of the pipe 5, and through the pipe 6

, ten

15

20

25

thirty

35

40

521498

Intensive suction (ejection) of gas that is mixed with liquid flows. In the lower tapering part of the mixing chamber 2, an additional increase in the flow velocity of the gas-liquid medium occurs. Then, the gas-liquid medium freely falls on the surface of the culture liquid, which is located in the tank of the apparatus for growing microorganisms.

The design features of the aerator in the apparatus for growing microorganisms provide the most efficient use of the energy of the incident fluid as a driving force for the ejection of the gas phase and active aeration of the culture fluid. Unlike well-known ejectors, which require high-pressure injection equipment for their operation in order to ensure a sufficiently high ejection ratio, this aerator does not require high pressure parameters for its operation and operates at atmospheric pressure. With lower energy consumption, the aerator provides high parameters for the volume of the ejected gas due to the presence of two gas phase inlets located in the upper part of the mixing chamber 2 (funnel zone) and in its lower part (through pipe 6). The increase in the ejection coefficient is due to the doubling of the effect of rarefaction of the falling liquid in the two indicated zones of the mixing chamber.

five

0

five

Claims (1)

Invention Formula An aerator, mainly to a microorganism growing apparatus, containing a cylindrical receiving chamber, equipped in the upper part with a gas supply nozzle, and in the lower part with a liquid supply nozzle, a displacement chamber, made in the form of a truncated cone, the upper part of which with a large base is located in the receiving chamber with the formation of an annular pocket, characterized in that, in order to increase the ejection coefficient, it is equipped with a pipe for additional ejection of gas into the lower part of the displacement chamber, installed with oosno kame51V) 986 frames and naTpyt Ky for gas supply, when the gas-liquid medium is located, this pipe has a spiral on the outer face between the pipe walls and the surface to create rotation of the displacement measure.