SU1341187A1 - Device for aerating and mixing liquid in ferments - Google Patents

Abstract

This invention relates to aerating and mixing devices in fermenters. The aim of the invention is to increase gas phase productivity. The device comprises conical plates 1 and 2, having suction necks 3 and 4 and forming a conical nozzle 5 for exiting the liquid. At the same time, a turbine is placed inside the cavity of the conical plates, consisting of disks 7 and 8, arranged to form an air outlet between them on the periphery of the slot 9. The output edges of the disks 7 and 8 are on the same vertical with the output edges of the plates 1 and 2. This arrangement eliminates the formation of vortices in the cavity between the conical plates, increases the liquid pressure and creates a greater vacuum at the outlet of the device, which leads to an increase in productivity. 2.il. i (L

Description

The invention relates to aerating type aerating devices and can be used in the microbiological industry for aerating and mixing the culture fluid in growth apparatus for microorganisms.

The purpose of the invention is to increase gas phase productivity.

FIG. 1 shows a device, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

A device for aerating and mixing the liquid in the fermenters contains ig by means of which the liquid phase of the turconic plates 1 and 2, having suction necks 3 and 4. The conical plates form an annular nozzle 5 for the outlet of the liquid, in which around the periphery there are lobes A central turbine between the plates houses a turbine consisting of disks 7 and 8 arranged to form an annular gap 9 between them along the outer radius for air outlet and the partitions 10 fastened together, the upper disk 8 named There is a coaxially arranged air inlet 11 for entering the turbine, and on the outer surface of the disks 7 and 8 are radially located fins 12, which serve to prevent the medium from sliding on the surface of the disks.

The device for aeration and mixing of the liquid is fixed on the drive shaft 13, which is housed in the bearing housing 14 and installed in a fixed casing 15, separated by hermetic partitions 16 and 17. preventing the ingress of medium. Through the casing 15 passes the pipe 18 for supplying air to the hole 11.

The device works as follows.

it is bulked and thrown to the periphery of the conical plates .1-nd 2, creating a vacuum at the outlet of the annular nozzle 5.

Since, in the proposed device, a nucleus of mixing liquid and air is formed in the place of maximum peripheral velocities, conditions are created for increasing the vacuum pressure and the pressure of the drawn air, which leads to an increase in the gas phase output.

In the proposed design, in comparison with the known device, reverse currents (vortices) are eliminated in the cavity between the conical plates. In addition, the pressure of the liquid increases due to the elimination of the slip of the liquid phase on the surface of the disks of the air turbine.

thirty

35

40

Claims (2)

Invention Formula A device for aeration and mixing of liquid in fermenters, containing conical plates having suction necks and forming an annular liquid nozzle radially located inside it along the periphery of the blade and placed in When the device rotates in the fermenter during the growth of microorganisms, the liquid medium flows through the suction ports 3 and 4 into the cavity between the conical plates 1 and 2. Upon hitting the radially located blades 6, the liquid medium is thrown to the periphery by them. Since the output edges of the disks 7 and 8 of the turbine for supplying air are arranged so that in each longitudinal section they are on the same vertical with the output edges of the plates 1 and 2, then A mixing core is formed in the zone of maximum peripheral speeds, i.e. on the periphery, and creates the conditions for the intensive suction of the air phase. Air enters the space between the disks 7 and 8 of the air turbine through the opening 11 of the upper disk 8, to which it is supplied from the atmosphere through pipe 18. To reduce the intensity of mixing of the liquid medium and eliminate its sliding along the surface of the disks 7 and 8, fins 12 are located on them, 2Q it is bulked and thrown to the periphery of the conical plates .1-nd 2, creating a vacuum at the outlet of the annular nozzle 5. Since, in the proposed device, a nucleus of mixing liquid and air is formed in the place of maximum peripheral velocities, conditions are created for increasing the vacuum pressure and the pressure of the drawn air, which leads to an increase in the gas phase output. In the proposed design, in comparison with the known device, reverse currents (vortices) are eliminated in the cavity between the conical plates. In addition, the pressure of the liquid increases due to the elimination of the slip of the liquid phase on the surface of the disks of the air turbine. thirty 35 Invention Formula A device for aeration and mixing of liquid in fermenters, containing conical plates with suction necks and forming an annular fluid nozzle, radially located inside it along the periphery of the blade and placed in a central cavity between conical plates; a turbine for supplying air, consisting of two disks arranged to form an annular gap between them along the outer radius in order to increase the gas phase performance, the turbine disks for air supply are arranged so that their OUTPUT edges in the longitudinal section are located on the same vertical with the output edges of the plates. Editor N. Kishtulints Order 4400/30 Circulation 499 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 FI.2 Compiled by N. Osipov Tehred L. Serdyukova Proofreader S. Shekmar