SU1522012A1 - Device for heat treating fine-particle material - Google Patents

Abstract

The invention relates to devices for the heat treatment of finely powdered materials in a stream of hot gases and can be used in the building materials industry, chemical and other sectors of the national economy. The purpose of the invention is to intensify heat transfer and increase thermal efficiency due to uniform distribution of the material over the mine section. The device contains a shaft 2 connected to it by ducts 7 cyclone-precipitator 6 with chute 5 located along the axis of mine 2, and the distributor 4 of material in the form of a ball, facing the convex surface toward the chute 5. The distributor 4 is fixed at the intersection points of the continuation of the curved surface parts of the ball with perpendicular to the axis of the shaft of its diametral plane. 2 hp f-ly, 2 ill.

Description

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distribution of material over the mine section. The device contains a shaft 2 connected to it by ducts 7 of a cyclone-precipitator 6 with chute 5 located along the axis of the shaft 2, and a material distributor in the form of a ball, facing a convex surface in

The invention relates to devices for the heat treatment of fine powdered materials in a stream of hot gases and can be used in the building materials industry, in particular in the preparation of cement clinker using the dry method of production, chemical and other sectors of the national economy.

The purpose of the invention is to intensify heat transfer and increase thermal efficiency due to uniform distribution of the material over the mine section.

Figure 1 shows a diagram of a counter-flow shaft heat exchanger; 2 shows a material distributor with fasteners.

The device for heat treatment of finely dispersed material consists of a rotary kiln 1, a shaft 2 with pinch 3, in the upper chamber of which a material distributor is installed, made as part of a ball that faces the inner surface towards the chute 5, located along the axis of the shaft, cyclone-precipitate - l 6, connecting gas ducts 7 with a shaft 2 and an outlet nozzle 8 - with cyclones 9. The source material to be processed, from cyclones enters the chutes 10 into the ducts 7. The distributor radius is 0.5 - 0.85 of the mine’s inner radius and basement Shen on rods 11 with bolts 12 to cover the shaft 2 at a height of 0.2 to 0.6 inner diameter shahty.Kreplenie distributor formed at the points of intersection continuation of the curved surface of the ball with the shaft disposed perpendicularly to the axis of the diametrical plane of the hemisphere.

The device works as follows.

Hot gases generated as a result of burning the technological side of the leak 5. The fastener of the distributor 4 is made at the intersection points of the extension of the curvilinear surface of a part of the ball with its diametrical plane perpendicular to the axis of the shaft. 2 hp f-ly, 2 ill.

first fuel in the rotary kiln 1, enter the discharge head and

then to the shaft 2. Due to the discharge generated by the exhaust fan, gases from the shaft are drawn through two stages of cyclones and gas ducts of the heat exchanger. Raw materials in the form of finely ground

the mixture is fed to the outlet 8, is picked up by the gas stream and carried into cyclones 9. In cyclones 9, the raw mix is separated from the gases and through chutes 10 enters the gas ducts 7, where the material is heated in a stream of hot gases.

From the cyclone precipitator 6 through the chute 5, the raw material mixture enters the distributor L. The flow of hot gases,

gets under the distributor, creates pressure and, coming to its periphery, produces a twist from the center to the wall of the shaft, i.e. in the zone of least resistance, where there is an additional dilution of the flow of hot gases when it enters the gas ducts 7. The distribution is performed as a part of a sphere with fastening at the intersection points of

its curvilinear surface with its diametrical plane located perpendicular to the shaft axis is not important if the upper point of the curved surface is strictly in the center of the temka, which is achieved by mounting and fastening, for example, on four rods of the distributor. The radius of the ball is chosen from the aerodynamics of the gas flow in the chamber and is 0.5–0.85 of the inner radius, while its smallest value ensures the free passage of gases into the gas duct, and with it the resistance to gas flow and heat exchange decreases,

the highest value creates an increased resistance to the flow of gas before the flue 7 and creates, as it were, an additional chamber over the distribution

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The heat exchange between the gas and the fine material is immediately increased in the first chamber of the shaft. The installation height of the distributor is adjustable and is 0.2-0.6 of the inside diameter of the shaft. This is the corresponding. the wearing is chosen in the same way as its diameter from the condition of the gas flow.

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The application of the proposed device will allow to increase the thermal efficiency of the heat exchanger as a whole due to the uniform distribution of the material throughout the mine and additional recirculation of gases in the distribution zone; divider

Claims (3)

1. A device for heat treatment of finely dispersed material containing a shaft, a cyclone connected to it by ducts with an ostrum located along the shaft axis and distributed ten 15 0 five 126 The body of material in the form of a streamlined body of rotation, turned by a convex surface toward the chute, characterized in that, in order to intensify heat exchange and increase thermal efficiency due to uniform distribution of the material over the shaft section, the distributor is made as a part of a ball, and its fastening is carried out at the intersection points of the continuation of its curvilinear surface located perpendicular to the axis of the shaft with its diametrical plane. 2. The device according to item 1, about tl and - the fact that the outer radius of the ball is 0.5 - 0.85 of the inner radius of the shaft at the level of the distributor, 3. A device according to Claim 1, about a tl, which is the fact that the distance from the top of the ball to the shaft cover is 0.2-0.6 of the inside diameter of the shaft.