SU1362906A1 - Device for heat treatment of raw mixture - Google Patents

Abstract

This invention relates to the production of building materials, in particular, to the technique of firing raw mixes for cement production using the dry method. The purpose of the invention is to increase the efficiency of heat transfer and reduce hydraulic resistance. For this, the calciner 2 of the rotary kiln 1 is cylindrical in shape with a length of 4-6 its diameter and connected to a cyclone heat exchanger system in the form of cyclones 4, 5, 6, 7. At the butt end of the calciner, a furnace 12 is placed for entering the raw meal, where 55-70% of the fuel is burned, 45-30% of the fuel is injected into the calciner. The calciner creates a significant temperature difference between the gas flow from the furnace and the raw meal, which improves the efficiency of heat exchange in the calciner, while eliminating the possibility of material falling out of the gas flow and reducing the hydraulic resistance of the calciner. 1 il. $ (L with O5 N3 SO about O5 / ///////////// 7/7 ////////////

Description

up to 1123-1173K. To maintain this temperature during the entire residence time of the material in the calciner, 30-45% of the fuel is introduced through the nozzles 17 5 of the calciner itself, combustion is provided by the excess air of the flue gases. Gas-dust mixture with a temperature of 1123-1173 K and a degree of decarbonization of flour up to 20-25% enters the gas duct 3, where it mixes with the high-temperature gases of the rotary kiln 1. A further decarbonization process takes place in the furnace duct, the degree of decarbonization reaches 80-95%. Next gas-dust mixture enters the cyclone 4 first

ten

The invention relates to the production of building materials, in particular to the technique of firing raw mixes for cement production using the dry method.

The purpose of the invention is to increase the efficiency of heat transfer and reduce hydraulic resistance.

The drawing shows a diagram of a device for heat treatment of the raw mix.

The device for heat treatment of the raw material mixture contains a rotary kiln 1. Decarbonizer 2 is cylindrical in shape and connected to a gas flue 3 rotary kiln and a cyclone heat exchanger system consisting of cyclones 4-7, respectively, first, second, third and 5 steps, where precipitation occurs the fourth-stage material. The length of the calciner, which in flow 10 is directed to

2 is 4-6 times its diameter. On the gas-rotating furnace 1 where

During 8, a pipe 9 is mounted to feed the clinker formation processes.

raw mix. Cyclone 4 is connected to the rotary-Aerodynamic mode of the furnace, decarbing the furnace through the chute 10. At the end of the decanter and the cyclone-heat exchanger carbonation system 2 above the chute 11 for the introduction of sons 20 is provided with an exhaust fan 19. The air of the end flour is placed in the furnace 12 for hedgehog burning fuel in the firebox 12, fuel run-off with pipes 13 and 14 correspond to the hot zone of the refrigerator 16 and

suitable for fuel supply and air transported through the duct 15.

Ha. The furnace 12 by the flue 15 is connected to the control of the aerodynamic regime

clinker cooler 16. The decarbonate at the calciner and the feed path of the gorge 2 contain nozzles 17 for supplying

fuel. A throttle valve 18 is mounted on the flue 3 of the rotary kiln 1. A system of cyclone heat exchangers is connected to the exhaust fan 19.

The heat treatment device Q determines the required speeds and the carrier raw mixture works by converting the gas flow into the decarbonisation vessel, eliminating the possibility of losing the raw meal and spinning from the gas flow. With

Condensing furnace 1 gases are supplied to this, and this reduces the hydraulic resistance of cyclone heat exchangers. The raw material of the calciner and the increase in time

Flour through pipe 9 is fed to j5 of the material staying at the stage of the decarbo-gas flue 8 of the cyclone 7 of the fourth stage, low.

where it is picked up by the gas stream

and together with it it is sent to cyclones 7. between the gas stream from the furnace and the post-cyclone system of cyclone heat-exchanging material into the calciner, poznik, raw meal, heated to 923-heighten the heat exchange rate

Claims (1)

973 K, from the second stage cyclone 5 post- in the calciner. It goes to calciner 2, one end of which is connected to the flue 3 of the rotating Formula of the invention for a furnace. In the furnace 12 located at the end of the calciner, 55-70% of the fuel is burned. A device for the heat treatment of the calciner. The process of the raw material mixture, which contains a rotating combustion of fuel in the furnace 12, is driven by a stove and connected to the furnace gas duct and system, in order to ensure the temperature of the cyclone heat exchangers for the calciner gases after the furnace 1573-1623 K. For the mash is cylindrical with a furnace for burning fuel, characterized in that, in order to increase the intensity of heat transfer and reduce hydraulic resistance, the fuel combustion chamber is located at the end of the calciner above the input of raw flour, and the calciner has a diameter of 4-6. The air is produced by a flap 18 installed in the lower part of the furnace flue 3. The implementation of the calciner with a length of 4-6 diameters of it, ensuring that the coefficient of excess air in the furnace is maintained at 1.7-2.5, and all the combustion air is fed into the furnace. In the calciner 2, the raw meal is picked up by flue gases, the speed of which is maintained at 17-18 m / s. In calciner 2, the material is heated Compiled by S. Prkova Editor M. PetrovaTekhred I. VeresKorrektor A. Zimokosov Order 5962/25 Circulation 543 Subscription VNIIPI USSR State Committee on Innovations and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4 up to 1123-1173K. To maintain this temperature during the entire residence time of the material in the calciner, 30-45% of the fuel is introduced through the nozzles 17 of the calciner itself, combustion is provided by excess air from the flue gases. Gas-dust mixture with a temperature of 1123-1173 K and a degree of decarbonization of flour up to 20-25% enters the gas duct 3, where it mixes with the high-temperature gases of the rotary kiln 1. A further decarbonization process takes place in the furnace duct, the degree of decarbonization reaches 80-95%. Next gas-dust mixture enters the cyclone 4 first steps, where the deposition of material takes place, which is directed along the chute 10 into  calciner and tract mountain feed The air is produced by a flap 18 installed in the lower part of the furnace flue 3. The implementation of the calciner with a length of 4-6 of its diameter, ensure