SU1364843A2 - Cyclone furnace for heat treatment of finely crashed material - Google Patents

Abstract

The invention relates to the field of heat treatment of fine materials and can be used in metallurgical, building materials and other areas of the Material. I industry. The purpose of the invention is to increase the efficiency of heat treatment by eliminating the formation of local high-temperature zones in the working chamber by burning fuel throughout the chamber volume. In the upper part of the body 1 of the cyclone furnace, blow nozzles 3 with loading devices 4 are installed. A cylindrical insert 5 is coaxially mounted in chamber 2. Gas nozzles 7 are installed at the top of insert 5 at a distance of 0.5-0.75. Air and Material enter the chamber 2 through the blowing nozzles 3. The fuel supply through the nozzles 7 ensures its gradual combustion in the volume of the chamber 2 in a swirling flow of air and material, which contributes to the stable operation of the furnace without formation and quality of the material. 2 Il. / -9, Material (L 00 Od 4; 00 4 CO N)

Description

The invention relates to the field of heat treatment of finely dispersed materials, for example, for calcining limestone, can be used in the metallurgical, building materials and other industries and is an improvement of the invention according to aut. No. 113A870.

The purpose of the invention is to increase the efficiency of heat treatment by eliminating the formation of local high-temperature zones in the working chamber by burning fuel in the entire volume of the chamber.

FIG. 1 shows a cyclone furnace, a general view; in fig. 2 shows section A-A in FIG. one.

The cyclone furnace consists of a cylindrical housing 1, inside of which there is a working chamber 2. In the upper part of the housing 1, blowing nozzles 3 with loading devices 4 are installed tangentially into the chamber 2 through blow nozzles 3. Tiumic processing of the ocynie material takes place in the working chamber 2. rotating state of the rotating flow. The dispersed fuel supply through the nozzles 7, as well as the supply of gravity in the direction of flow of the working chamber 2, ensures the

10 foamy its combustion in the volume of chamber 2 in a swirling air flow of the material. At the same time, the process of heat exchange between the material and the gas phase proceeds, which ensures

1G bakes the creation in the working chamber 2 of moderate temperatures that are not necessary for firing.

Fuel is fed through the upper metering current of the insert 5 so that the process

20 burnings of fuel and heat and mass transfer were performed in working chamber 2. This requirement is met by the condition of inputting the ice in the area of 0.50-0.75 the length of the sun. Air is supplied to the furnace in the amount of

thirty

Re 2 is coaxially mounted to a cylinder 5, which corresponds to a coefficient insert 5 with annular projections 6 on the outer surface. And the distance between the protrusions

6 decreases in the direction of movement of the gas stream, and the height increases. The insert 5 is made hollow and on its upper part, which is 0.50-0.75 length, gas nozzles 7 are installed. The insert 5 is made of heat-resistant steel, lined outside with heat-resistant concrete. Nozzles

7 are installed by mat-blow nozzles 3, i.e. the direction of movement of the gas flows from the nozzles 3 and 7 coincide. The insert 5 is connected from above to the gas pipeline 8 through the compensator 9. The ignition of the fuel in the furnace is carried out by the ignition device 10 installed in the upper part of the chamber 2. The exhaust gas duct 11 is connected to the housing 1 in the lower part to remove flue gases from the working chamber 2 .

The furnace works as follows.

After ignition of the furnace, when clean air is supplied through the blowing nozzles 3, and the fuel through the gas duct 8 and the insert 5 through the gas nozzles 7 is ignited by the ignition device 10, the required temperature conditions are established and through the charging devices 4 the crushed material is fed into the working chamber 2 . In this case, the nostril and the material enter

excess air 1.05-1.15, i.e. corresponds to optimal knowledge.

The aerodynamic environment in the working chamber 2, which maintains the torque of the dust-gas flow at the same level, is provided by means of the projections 6 on the insert 5. Thermal deformations of the insert 5 play

35 are compensated 9.

The dust-gas stream — flue gas and calcined material — is removed from the furnace through the duct 11.

Heat treatment finely ground

40 materials in the proposed furnace with the compression of fuel in a dispersed flow in the volume of the working chamber exclude the formation of local high-temperature zones, which provides stability

45 operation of the kiln without nastoobrazovanii, which require frequent stoppages of the kiln for cleaning and repair, and obtaining a burnt material with a stable high performance.

50

Claims (2)

Invention Formula A cyclone furnace for the heat treatment of 55 finely ground material according to ed. St. No. 1134870, in order to improve the efficiency of heat treatment by eliminating the formation of chamber 2 through blow nozzles 3. Heat treatment of ocynie material is carried out in working chamber 2 in a suspended state of a rotating flow. The dispersed supply of fuel through the nozzles 7, as well as the supply of fuel in the direction of flow in the working chamber 2, ensures its gradual combustion in the volume of chamber 2 in a swirling air and material flow. At the same time, the process of heat exchange between the material and the gas phase proceeds, which ensures the creation in the working chamber 2 of moderate temperatures, which are necessary for roasting. Fuel is fed through the upper portion of the insert 5 so that the processes burning of fuel and heat and mass transfer was completed in the working chamber 2. This requirement is met by the condition of fuel input in the area of 0.50-0.75 insert length. Air is supplied to the furnace in the amount ve, which corresponds to the coefficient excess air 1.05-1.15, i.e. corresponds to the optimal value. The aerodynamic environment in the working chamber 2, which maintains the torque of the dust-gas flow at the same level, is provided by the projections 6 on the insert 5. The thermal deformations of the insert 5 are perceived by the compensator 9. The dust-gas stream — flue gases and calcined material — is removed from the furnace through the duct 11. Heat treatment of finely ground material in the proposed furnace with fuel combustion in the dispersed stream in the volume of the working chamber eliminates the formation of local high-temperature zones, which ensures stable operation of the furnace without overgrowths that require frequent stoppages for cleaning and repairing the furnace, and obtaining a burned material with stable high quality indicators . Invention Formula Cyclone furnace for the heat treatment of finely ground material according to ed. St. No. 1134870, characterized in that, in order to increase the efficiency of heat treatment by eliminating the formation 1364843 local high-temperature zones in the hollow insert at a distance of 0.5 working chamber due to the combustion of fuel in the entire volume of the chamber, it is equipped with placed in the upper part 0.75 of its length by gas nozzles with blow nozzles in which the loading devices are placed. 0.75 of its length by gas nozzles with co-blowing nozzles in which the loading devices are located. uz.Z