SU1445806A1 - Cyclone - Google Patents

Abstract

The invention relates to devices for the centrifugal cleaning of dusty gases and can be used in the chemical and food industry. The purpose of the invention is to reduce product losses by eliminating foam and spatter formation within the cyclone. An additional cone shell 5, installed in the lower part of the housing, has a liquid supply nozzle 6 and a distributor 7 with a reflector 8 forming an annular channel 9 narrowing downwards. Through the nozzle 6 and the dispenser 7, the liquid enters the channel 9 and the stack 5 capture particles of dry milk powder. In the lower part of the shell 5, a sensor 16 of a level regulator 15 is installed to maintain a constant level of liquid. 1 3. Clause f-ly, 1 ill.

Description

Dust gas

(L

1.L55

 : -g: L- Liquid

4 SP

СХ5

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ABOUT)

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The invention relates to centrifugal gas cleaning devices, in particular for cleaning the exhaust air in spray dryers for milk, and can be used in the chemical, energy and food industries.

The purpose of the invention is to reduce product losses by eliminating foam and spatter within the cyclone.

The drawing shows a cyclone, obsh, i view.

The cyclone has a body 1 with cylindrical and conical parts, a tangential inlet nozzle 2. The conical part of the body is made of two truncated cones 3 and 4 facing each other with large bases. Coaxially inside the lower part of the housing 1 is installed shell 5 in the form of a reverse cone. In the upper part of the shell 5 there is installed a pipe 6 for supplying a liquid and a distributor 7, made in the form of a hollow ring with holes along the inner perimeter. The fixed reflector 8 is complete as a reverse truncated cone attached by a large base to the base of the shell 5, the smaller base of the reflector 8 is located at a distance from the wall of the shell 5 in its cavity. The fixed reflector 8 with the inner surface of the shell 5 forms an annular channel 9 narrowing downwards. The width of the channel 9 is chosen from the condition of its full flooding at a given fluid flow rate, which prevents the dry product particles from entering and being microbiologically spoiled.

Along the axis of the cylindrical part of the housing 1 is placed the pipe 10 for removal of purified gas. A discharge nipple 1 with a valve 12 is connected to the top-not shell 5 located under the nozzle 10. A locking valve 13 is installed in the lower part of the cone 4. An annular slot 14 is formed between the cone 3 and the shell 5. The outlet nozzle 11 is provided with an adjustable a level 15 valve connected to the valve 12. A sensor 15 of the level 15 controller is located in the lower part of the shell 5.

The cyclone works as follows.

The gas flow from the drying tank through the tangential inlet pipe 2 enters the cylindrical part of the housing 1 and in the annular gap between the pipe 10 and the cylindrical part of the housing 1 acquires a rotational motion. Under the action of inertial forces, dust particles are separated from the flow and are thrown against the wall of the body, and then pressed into the annular gap 14. Under the action of inertial forces and gravity, the particles released from the flow continue to settle in a closed unventilated space and exit through the sluice gate 13 product collection. The particles remaining in the cleaned stream continue to be released from the gas in the shell 5, internally.

The surface of which is wetted by a thin layer of irrigating liquid (for example, milk) supplied through a valve distributor 7 of the shell 5 and a tapered annular

channel 9.

Fine particles stick to the wet surface, mix with the liquid and through the discharge pipe 11 with the valve 12 are removed together with the liquid stream for re-processing.

In the process of cyclone operation, the level 15 regulator controls the level of the fluid in the shell 5, keeping it constant. When the liquid level changes, the signal from

5, the sensor 16, which is set to a certain level, is supplied to the level controller 15, which acts on the valve 12, opening or closing it. Due to the fact that the fixed reflector 8 and the shell 5 are located with large bases upwards, there is no separation of the gas flow containing the fine dust fraction from the walls of the shell 5 and this contributes to its better contact with the surface of the irrigating liquid along the entire path of movement, and supply of irrigating fluid through the distributor 7 with openings along the inner perimeter into the annular channel 9 between the fixed reflector 8 and the shell 5 prevents the formation of foam and splashing inside the shell 5 in a wide measuring range Neni costs scrubbing liquid, which prevents kapleunos.

Maintaining a constant level in the shell 5 ensures uninterrupted operation of the cyclone, combining dry and wet gas cleaning, preventing the shell 35 from overflowing with liquid and entering it into the dry dust collector.

Claims (2)

1. A cyclone containing a cylindrical body, a tangential inlet, axial nozzles for removing gas and dust collected coaxially in the lower part of the body beneath the nozzle for evacuating the purified gas. 45 in a vertex and a liquid distributor around the perimeter of the base, characterized in that, in order to reduce product losses by eliminating foam and splashing inside the cyclone, it is provided with a reflector, made in the form of a reverse truncated 50 of the cone, the larger base of which is attached to the base of the shell, and the smaller one is located in its cavity, at a distance from the wall, forming an annular channel narrowing downwards, in the upper part of which there is a liquid distributor. 2. A cyclone according to claim 1, characterized in that it is equipped with a fluid level regulator, the sensor of which is located in the lower part of the shell.