SU958818A1 - Rotary kiln slime heater - Google Patents

Description

(54) SLOW HEATER OF ROTATING FURNACE

This invention relates to intrahepatic heat exchangers for rotary kilns for cement clinker burning.

A slurry heater of a rotary kiln of a wet production method is known, comprising a hollow drum fixed inside the kiln body by means of radial partitions and a row of radial chains attached at one end to the drum and the other to the kiln body. When the furnace rotates, the slit entering the heater sticks to the surface of the drum and chains. A layer of sludge deposited on the gas exchange surface is heated by passing kiln gases. When dry, the slurry is partially shaken from the heat exchange surface as a rumble, and is partially covered with a subsequent layer of schlum.

The disadvantage of this preheater is that the chains that are visited radially between the drum and the furnace body do not clear the sludge from the surfaces of the drum and furnace, as well as the surfaces of the chains themselves, which reduce heat transfer, increase the flow resistance of gases in the furnace.

In addition, furnace gases passing along it are relatively ineffective in heating the surface of the chains, the surface of the drum and the surface of the furnace. This is due to the fact that the design of the preheater does not contribute to the grooving of the grooves. In this case, the design of the preheater does not provide for the dedusting of gases passing through it.

The purpose of the invention is to improve the heat exchange and dust collection in the preheater. The goal is achieved by the fact that a heater containing a hollow drum and a row fixed inside the furnace body by means of radial partitions

The 15 vertical chains attached at one end to the drum, and the other to the furnace body, are equipped with tailored chains fixed to adjacent radial partitions and placed between the rows of radial chains, while the partitions are bent relative to the longitudinal plane of the furnace.

FIG. 1 shows a heater, cross section; in fig. 2 is a view A-A in FIG. 1. A drum 3 is installed in the inner cavity of the rotary furnace 1 by means of radial partitions 2. Free-hanging chains 4 are visited coaxially with the furnace of the installed drum 3, and between the furnace body 1 and the drum 3 are radial chains 5. Between the rows of radial chains 5 are fixed nd chains 6, sagging multiwire ndy in the plane of the cross section between the furnace body 1 and the drum 3. When found in the upper position above the drum chain, located at the drum, adjacent to the drum body 3. At the same time, the chain located at The furnace body sags in an arc equal to the arc size of the furnace body 1, while the sagging arms do not overlap one another. The radial partitions 2 are bent relative to the longitudinal plane of the furnace and are set at an angle of about. (15-75 °. The plane of the bend gases are directed to chains 5 and 6 and to the surface of the drum 3. Thus, heat transfer between the gases and the heat exchange surface is improved. heat exchange is achieved when the partitions are bent at an angle to the longitudinal plane of the furnace 15- At about 15 °, no improvement in the turbulization of gases is achieved, and when gases are bent, they are directed to the periphery of the furnace, and therefore the chains are washed

low intensity and no improvement in heat transfer.

The heat exchanger is installed in the cold end of the furnace at a distance from the edge equal to one to two furnace diameters. The length of the heat exchanger is between 0.5 and 3.0 furnace diameters. The chains in the heat exchanger are hung along the entire length. At the same time part of the partition is bent can be left without hanging chains. Distance between

between the rows of radial chains, while the partitions are made with a bend relative to the longitudinal plane of the furnace.

Claims (1)

Sources of information taken into account in the examination 1. Kopeliovich V.M. et al. Heater for rotary kilns. Scientific and technical abstract collection “Cement industry, ITMEC, vol. 2, 1979, p. 3-4. The straight and radial chains are between 1.1 and 2.0 overall dimensions of the chain link. Heater schlama works as follows. When the furnace is rotated, the bead chains 6 change the direction of sagging of the arc and when slipping along the surface of the chains 5, the furnace body 1 and drum 3 are cleaned with ca. and cleaned of the sludge buildup. When the direction of the sagging arc changes, the wetted chains moistened with an alkaline moisten the other circuits and thus create an additional heat exchange surface to contact the gases with the slit. Increasing the degree of wettability of the chains with a slurry and changing the direction of the gases by the bend plane of the partition improves dust control of the passing gases. Claims Heater of a rotary kiln sludge heater containing a hollow drum fixed inside the furnace body by means of radial partitions and rows of radial chains attached at the end to the drum and the other to the furnace body, in order to improve heat exchange and dedusting chains attached to adjacent partitions and placed bud.f  F1 ig. 2