SU719699A1 - Cyclone chamber for heat treatment of finely dispersed materials - Google Patents

Description

one

The invention relates to cyclone chambers for the heat treatment of fine raw materials and can be used in the metallurgical, chemical, food industry.

Cyclonic chambers are known for the terprocessing of fine materials. Such chambers have gas inlet nozzles mounted tangentially to a cylindrical shell and feed nozzles on the upper end cover and openings for separating or aligning the gas and material outlet 1.

In these chambers, the raw material for heat treatment is introduced directly into the gas stream. At the same time, particles up to 0.03 mm are not separated into walls, but are carried away from Kayo | s with waste gases. Consequently, the known cyclone chambers cannot be used for the processing of fine materials, such as kaolin, etc.

A well-known cyclone chamber, comprising a housing made in the form of two truncated cones connected by large bases, an inner insert, pipes for the joint input of raw materials and a small crusher (E WaYepHiatfa and lower Hole for the joint output of the Basin and the finished product 2.

The disadvantage of this cyclone chamber is that the entire processed mass of the raw material is carried with the exhaust gases, and to separate the HofOi product and the required volume of the installation to include separate devices, which leads to an increase in energy consumption.

Closest to the described invention in technical essence, and the achieved result is a cyclone chamber comprising a cylindrical body with a cover and a bottom, branch pipes for introducing the processed material and gas, outlet pipe for exhaust gas and receiving device for the processed fine material 3.

A disadvantage of the known chamber is the low heat treatment efficiency.

The aim of the invention is to increase the efficiency of heat treatment by eliminating material deposits on the body and emitting it with waste gases.

The goal is achieved by the fact that the cyclone chamber is provided with a screen placed by the receiving device of the processed fine material.

It is advisable to install the input pipes of the material being processed tangentially to the bottom.

FIG. 1 shows the proposed cyclone chamber; in fig. 2 - the same, bottom view.

The cyclone chamber consists of a cylindrical body 1 bonded to the lid 2 and the bottom 3, gas inlet nozzles 4, disposed on the body 1 with respect to its guide, the raw material input nozzles 5 installed tangentially to the bottom 3, the receiving device 6 with the screen 7, attached over the opening of the receiving device and forming an annular slot 8 for the output of the processed Material. The exhaust gas outlet 9 is located in the lid 2 along the axis of the housing 1. The screen diameter d is chosen from the relation C1 (1.2 + 1, 8) dj, where dc is the diameter of the exhaust gas outlet 9;

Cyclone camera works as follows

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The heat treatment gas is supplied through the inlets 4, as a result of which a swirling flow is created in the chamber. The processed material is fed through the nozzles 5 input raw materials. The raw material is drawn into the movement along the bottom 3 due to the gas flow. At the same time, due to the heat exchange of material particles with gas and walls, heat treatment of the raw material takes place, which then falls under the screen 7, through the slit 8 into the receiving device 6. Exhaust gases enter the outlet 9 and exit the cyclone chamber.

Placement of nozzles input raw materials (processed material) on the inner surface of the bottom and install the screen above

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the opening of the receiving device allows the finished product to be separated from the exhaust gases. Such an arrangement of the input pipes of the raw material makes it possible to control the residence time of the particles of material at the bottom of the chamber by varying the feed rate of the raw materials. As the feed rate increases, the residence time of the particles in the cyclone chamber increases due to an increase in the initial portion of the flat jet of particles. The installation of gas inlet nozzles with respect to the bottom of the chamber makes it possible to eliminate the appearance of material sediments on the body and to increase the efficiency of heat treatment of the fine material.

Claims (3)

1. A cyclone chamber for heat treatment of finely dispersed materials, including a cylindrical body with a lid and bottom of the input pipe of the processed material and gas, a nozzle of the exhaust gas and the receiving device of the processed fine material, characterized in that, in order to increase the efficiency of heat treatment by eliminating the material on the body and its emission with waste gases, it is equipped with a screen placed above the receiving device of the processed finely dispersed material. 2. The chamber according to claim 1, characterized in that the nozzles of the input of the processed material are set tangentially to the bottom. Sources of information taken into account in the examination 1. Sidelkovsky L.N. Cyclone energy technology processes and installations. M., 1962, p. thirty. 2. USSR author's certificate number 366330, cl. F 27 B 15/00, 1969.  3. Patent of Germany No. 1679809, cl. 39 a 1/02, 1973. .. Phage.2