RU2279223C1 - Apparatus for producing of egg powder - Google Patents

Abstract

FIELD: food-processing industry.

SUBSTANCE: apparatus has vertical cylindrical drying chamber with conical bottom and upper vortex-type inlet for drying agent. Axial pipeline disposed in upper part of drying chamber is adapted for discharge of used drying agent. Conical baffle is positioned within drying chamber on axial pipeline for discharge of used drying agent, with base of conical baffle being oriented downward. Conical baffle defines annular slot in conjunction with walls of drying chamber, with inlet of axial pipeline for discharge of used drying agent being positioned above base of conical baffle. Such construction enables optimal distribution and regulation of heat-carrier flows and flows of material to be dried through variations in design of apparatus.

EFFECT: intensified drying process owing to increased moving force of drying process due to concentration difference and increased efficiency, reduced consumption of power for moisture evaporation, and reduced loss of final product.

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Description

The invention relates to the food industry, in particular to the technique of spray drying solutions and suspensions, in particular to the production of dry food products, mainly egg powder, in particular to devices for processing melange into egg powder, and can find application in food processing, dairy, chemical, pharmaceutical, biological and other industries for drying liquid solutions of a similar consistency in order to turn the latter into powder or lower their moisture.

A device for spray drying is known, including a cylindrical body with a conical bottom, in which the discharge device is located. A horizontal partition is made in the cylindrical part of the housing with openings closed by filters. Holes connect the upper and lower parts of the housing. A pipeline for supplying a coolant is located in the center of the partition; an injector for spraying suspensions and liquids is placed in the pipeline. The upper part of the casing is connected to the exhaust pipe (see application WO 0074837, class B 01 J 2/16; B 01 D 1/18, from 2000).

The closest solution adopted for the prototype is a known spray dryer containing a vertical cylindrical drying chamber, a discharge cone, a rod with a nozzle located in the lower part of the chamber, and an upper vortex inlet of the drying gas, an annular collector, a narrowing gas supply pipe of the drying gas, located under the nozzle, horizontal and vertical nozzles, gas distribution device, regulating damper and counterbody installed along the axis of the gas supply nozzle narrowing Gosia and connected to it (see. RF patent №2166713, cl. the F 26 B 3/12 from 1999).

The disadvantages of the known devices include low productivity and drying efficiency.

The technical problem solved in the invention is the optimal distribution and regulation of the flow of coolant and the dried material by changing the design of the device.

The technical problem is achieved by the fact that in the installation for the production of egg powder, comprising a vertical cylindrical drying chamber with a conical bottom and an upper vortex inlet of the drying agent, an axial pipe for exiting the spent drying agent located in the lower part of the drying chamber is installed in the upper part of the chamber in the center of the housing nozzle and discharge nozzle installed in the conical bottom of the drying chamber according to the invention inside the drying chamber on an axial pipe to exit from of the running drying agent, a conical reflector is installed with the base downward, forming an annular gap with the walls of the drying chamber, and the entrance to the axial pipe for exhaust gas is located above the base of the said conical reflector.

The presented drawing schematically shows the proposed device for the production of egg powder.

A device for the production of egg powder consists of a vertical cylindrical chamber 1 with a conical bottom. A vortex inlet of a smaller diameter agent 2 is installed in the upper part of the chamber, to which a nozzle 3 is tangentially connected to supply a heated drying agent and to communicate the last rotational movement in the chamber 1. In the center of the vortex inlet 2 there is a coaxial pipe 4 for removal of the spent drying agent. On the pipeline 4, a conical reflector 5 is fixed with its base down, forming an annular gap 6 between it and the inner wall of the cylindrical chamber 1. In the lower part of the chamber, coaxially with it, there is an upwardly directed nozzle 7 for spraying the material to be dried. In the lower part of the conical bottom of the chamber 1, an unloading pipe with a shutter 8 is made to remove dry powder.

A device for the production of egg powder works as follows. A drying agent enters the vortex inlet 2 through the pipe 3 with high speed, which is pumped along the annular gap 6 into the drying chamber 1, where it forms a swirling flow of the drying agent, directed downward in a spiral. Changing its direction at the conical bottom of the chamber, the flow moves to its axis and, along the latter, to the pipe 4 for removal of the spent drying agent, through which it is discharged from the chamber. When the initial melange is sprayed with the nozzle 7 and its interaction with the drying agent, egg powder is formed, which due to the centrifugal field in the vortex stream of the drying agent is not last removed from the chamber 1 with the spent drying agent, but is retained in it.

In this design of the drying chamber 1, the dry drying agent moves down along the chamber wall, and the wet spent drying agent moves along the chamber axis in the form of a thin bundle, the diameter of which is comparable with the diameter of the discharge pipe 4, up. Due to concentration differences, moisture diffuses from the center to the walls of the drying chamber and upward because the density of moist air is less than the density of dry air. The conical reflector 5 prevents water vapor from leaving the spent spent drying agent in a fresh drying agent entering the dryer. This also contributes to the fact that the base of the conical reflector 5 is located lower than the entrance to the discharge pipe 4. After the drying process is completed, the obtained egg powder is discharged from the chamber 1 through the discharge pipe with a shutter 8.

Thus, the installation, due to the presence of a conical reflector in the drying chamber, makes it possible to make the drying process more intensive by increasing the driving force of the drying process (concentration difference) and more productive, reduce the specific energy consumption for moisture evaporation, and also reduce the loss of the final product.

Claims (1)

A plant for the production of egg powder, containing a vertical cylindrical drying chamber with a conical bottom and an upper vortex inlet of a drying agent, an axial pipe for exiting the spent drying agent located in the upper part of the chamber in the center of the housing, an nozzle and an unloading nozzle installed in a conical the bottom of the casing, characterized in that a conical reflector is installed inside the drying chamber on the axial pipe to exit the spent drying agent spruce base down, forming an annular gap with the walls of the drying chamber, and the entrance to the axial pipe for the exit of the spent drying agent is located above the base of the said conical reflector.