RU1768631C - Equipment for growing of food yeast - Google Patents

Abstract

Usage: microbiological industry, plant for growing fodder yeast Summary of the invention: the plant contains a yeast-growth container and a device for mixing yeast, culture medium with aerating gas. This device includes a housing and horizontal shafts with wedge-shaped vanes on racks. The device is placed above a yeast-filled container, and the lower part of its body is connected by a vertical pipe for the flow of a gas-saturated medium with a container, shafts with blades are located at the bottom of this body, and above them there is a chamber with a perforated bottom to form separate jets of the culture medium. The cavity of this chamber is connected by a circulation pipe to the lower part of the yeast-growth container, the pipe being provided with an airlift. 2 ill.

Description

The invention relates to agricultural feed production, and in particular to plants for preparing feed yeast for animals.

A device for preparing fodder yeast is known, comprising a vertical container, in the lower part of which there are horizontally mounted shafts with reinforcements on the uprights by wedge-shaped blades, on the lateral surfaces of which longitudinal and transverse grooves are made. Racks are placed on the shafts along a helix along the entire length of the shaft. Adjacent racks are located on the shafts so that they form an angle of 90 ° in the same vertical plane between them. The tank is equipped with a piping system and a collector, see A.S. No. 1218669 AC 12 M 1/02. 1984

The disadvantages of this device is that during aeration of the medium air is supplied to the liquid in the lower part of the tank, and this leads to a large air flow rate, due to the fact that undissolved gas has

the property is grouped into large bubbles and quickly expelled from it: the small thickness of the cavitation cords does not allow a sufficiently large volume of the nutrient substrate to pass through them, which creates large energy losses for the total mixing of the entire liquid in the container.

The purpose of the invention is to increase productivity and reduce energy consumption for aeration due to more complete saturation of the culture medium with gas. This is achieved by the fact that the mixing device is placed above the yeast-growing container, the lower part of the casing is communicated with a vertical pipe for the flow of gas-saturated medium, the blades with blades are located at the bottom of this casing, and above them there is a chamber with a perforated bottom g. the formation of individual jets of culture medium, while the cavity of the indicated Kdi-iopt1 is connected by a circulation pipe

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a house with a lower part of a yeast-container equipped with an airlift.

Figure 1 shows the proposed device, a longitudinal section; figure 2 is a section aa in figure 1.

The plant for growing feed yeast contains a device 1 for mixing gas with liquid, located above the yeast container 2, on the cover of the said device above the mixing shaft 3, the rotation of which is directed downward relative to the wall, an airtight hatch 4 is installed by means of a pipe 5 located below the mixing shafts 3, but above the bottom of the device, the lower part of the device 1 communicates with the top of the yeast container 2. The location of the nozzle 5 allows you to have a constant level of nutrient solution, such that the blades 6 are immersed and the liquid to a depth equal, for example, its tenfold thickness, for periodic discharge of liquid from the device 1, a nozzle 7 with a valve 8 is installed in the bottom 8. In the upper part of the device 1 from the side opposite from the hatch 4, by means of a partition 9 and a perforated bottom 10, a chamber is formed which, through the vertical circulation pipe 11, communicates with the bottom of the yeast container 2, the circulation pipe 11 in the middle part has valves 12 and 13 in the lower part, the valve 14 and the suspension den compressed air. The yeast-growing capacity in the upper part has a neck 15.

The rotation of the shafts 3 is carried out by the drive 17.

To prepare the nutrient solution, in the aerator 1, with the shutter 16 closed, through the hatch 4, fill the bottom level 10 with a liquid nutrient medium containing grain, coarse fodder, macro and micro additives, solid fractions of the feed are discharged into the rotation zone of the blades 6. Shafts 3 are driven in rotation with oncoming movement of the blades. The number of revolutions of the shafts is set so that the speed of movement of the blades 6 is, for example, 20 m / s. At the same time, steam (not shown) is supplied to the area between the shafts. As a result of organizing the long cavitation cords created by the blades 6 throughout the entire volume of the lower part of the aerator 1, an intensive process of cavitation destruction of solid feed particles occurs, which is amplified by the temperature effect of the steam coming from the collector (not shown). Destruction and grinding of solid particles of nutrient

components allow to increase their mass transfer surface.

Then the contents of the aerator 1 through the valve 16 is poured into a yeast-growing container 2, where it is diluted with water to the optimum temperature and concentration of nutrients.

To prepare the yeast feed, working leaven is introduced into the container 2 through the neck 15. The hatch 4 is closed, the valves 14 and 16 are opened, air is supplied to the circulation pipe 11. The liquid from the tank 2 through the valve 14 enters the pipe 11. where it is saturated with air,

In this way, a gas-liquid mixture, which, rising through the pipe 11, is poured onto the perforated bottom 10, the flow is distributed into the trickles, and enters the blades 6. From the liquid, insoluble gases are released, which leads to heavy foaming. Foam fills the entire volume of the device 1. The fluid through the nozzle 5 (the live section of which does not allow creating excessive pressure in the device 1) is poured by gravity into the yeast-container 2. The liquid begins to circulate in a closed circuit. Foam, filling the volume of the device, slowly disintegrates and forms again.

To accelerate the change of foam in the device, shafts 3 are rotated with blades 6 at a speed of, for example, 30 m / s. The blades 6 pick up liquid from the bottom of the device, mix it with air and

foam, and liquid particles, tearing off the blades 6, break the head of the foam, bringing it to a foggy state, now liquid with the smallest particles of foam comes out of the nozzle 5. The airlift capacity is adjusted so that the dissolved oxygen does not exceed 10 mlg / liter. Gate valves 12, 13 serve to dispense finished products.

A positive effect is achieved in

by increasing productivity and reducing energy consumption for aeration.

Claims (1)

SUMMARY OF THE INVENTION Fodder Growing Plant yeast containing yeast expansion vessel and a device for mixing the culture medium with aerating gas, comprising a housing and horizontal shafts with wedge-shaped vanes mounted on racks mounted on them, so that, in order to increase productivity and reduction of energy consumption for aeration due to more complete saturation of the culture medium with gas, a device for mixing is placed over a yeast-growing container, the lower part of its body is connected by a vertical pipe for the flow of a gas-saturated medium with a container, shafts with blades are located at the bottom of this body, and above them there is a perforated chamber bottom to form separate jets of the culture medium, wherein the cavity of the chamber is connected by a circulation pipe to the bottom of the yeast-storage container, and the pipe is provided with an airlift. FIG. 17 Fia. 2.