SU498466A1 - Muffle rotary kiln for burning piece goods - Google Patents

Description

one

The invention relates to the field of muffle rotary kiln constructions for firing piece products, in particular, ceramic with countercurrent movement of the products to be baked and the coolant.

Known rotary kilns for burning piece goods are known. They contain a cylindrical body with burning tubes arranged along a cylinder and concentrically arranged central external channels for heat carrier supply, devices for loading and unloading products, and a fuel and air supply system.

A disadvantage of the known furnace is the impossibility of providing a predetermined temperature distribution along the length and cross section of the furnace, which prevents the use of this furnace for the firing of ceramic products.

The aim of the invention is to provide the necessary temperature and improve the quality of products.

This goal is achieved by the fact that the central and outer channels of the furnace along the entire length are provided with respectively perforated throttling diaphragms and rings.

FIG. 1 shows the proposed furnace; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. 2; in fig. four-

bb section in fig. 2; in fig. 5 is a section along G ‑ Y in FIG. 2; in fig. 6 is a section along E-E in FIG. 2. The proposed muffle rotating

The furnace contains a cylindrical body 1, devices for loading 2 and unloading 3 of the products being calcined, fuel (gas) 4 and hot air supply systems 5 and exhaust gas exhaust system 6.

Inside the cylindrical body 1 of the rotary kiln, sealed refractory calcined tubes 7 and concentrically arranged central 8, consisting of separate rings, are placed along the cylinder-forming cylinder;

outer 9 channels for the supply of coolant, supplied along the entire length, respectively, perforated throttling diaphragms 10 and rings I. The ends of the firing tubes 7 are drawn out for

uniform supply and unloading of tiles to the loading 12 and the unloading 13 cones. The described furnace works as follows. Ceramic tile through the loading cone 12 enters the firing tubes 7. For

the inclination and rotation of the furnace tile moves along it. During the combustion of gas, the combustion products move along the central 8 and outer 9 channels. Hot gases wash the burning pipes 7 without direct contact with the burning product, which ensures even burning of the tiles.

The presence in the channels of throttling devices provides a predetermined temperature distribution along the length and its cross section.

The entire length of the furnace is divided into zones - heating, firing, cooling.

Different temperatures in the zones are achieved by throttling the diaphragms 10 and the rings 11, increasing and decreasing the flow area of the channels 8 and 9.

At the end of the preheating zone, the flue gases are collected in the central gas channel and discharged into the exhaust system 6. The burned tile, the exit from the firing tubes 7, is fed to the discharge cone 13, and then is fed to the conveyor through a spiral cooler.

Subject invention

Rotary muffle furnace for short products, for example, ceramic

countercurrent movement of the products to be calcined and the heat transfer medium, comprising a cylindrical body with burning pipes arranged along the cylinder generatrix and concentrically placed central and

external channels for the supply of coolant, a device for loading and unloading products, a fuel and air supply system, characterized in that, in order to ensure the required temperature conditions

and improving the quality of products, the central and outer channels along the entire length are provided with respectively perforated throttling diaphragms and rings.

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