SU1760280A1 - Rotary furnace - Google Patents

Abstract

Usage: production of building materials, including chamotte firing, heat treatment of various materials in rotary drum devices. SUMMARY OF THE INVENTION: A shell of a length of 1.5-2 times the diameter of the furnace body is installed at the charging end inside the furnace with a gap relative to the body. The size of the gap is equal to the thickness of the main lining. 1 il.

Description

The invention relates to the production of building materials, in particular, to rotary kilns for burning chamotte, for the heat treatment of various materials in rotary drum devices.

The purpose of the invention is to increase the turnaround time between the lining of the furnace body.

The drawing shows a rotary kiln.

The installation includes a housing (drum) 1 with a refractory lining 2 and an initial section of the housing (drum) with an inner shell 3 of heat-resistant sheet steel.

The inner shell 3 is fixed on supporting devices (for example, on channel bars) at a distance from the outer shell (body) equal to the thickness of the lining in the rest of the rotary kiln. Includes Sliding Lined Boot Chamber 4

with boot chute 5 and suction pipe 6.

A retractable lined unloading chamber 7 with a burner 8, a chute 13 and a valve 14. A smoke exhauster 12 with a dust cleaning system, for example, a cyclone 11, is installed to remove the spent heat carrier.

The furnace works as follows.

The body (drum) 1 of the furnace is driven in rotation by the electric drive 10.

Through the loading chute 5 serves the processed material while the burner 8 is running.

Combustion products with countercurrent movement heat the processed material to the required temperature, and are removed from the furnace body through the suction tube b, pass through a dust cleaning device (cyclone) 11

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and exhauster 12 is emitted into the atmosphere.

As the inclined furnace 1 rotates, the material gradually moves to the discharge end and, after being heat treated, is removed from the furnace through the discharge chute 13.

Valve 1 serves to seal the chute and furnace, 1Q

The presence of the sliding loading chamber 4 allows you to quickly maintain the tightness of the joints between the chamber 4 and the housing 1 (air leaks from the surrounding space are minimized, which allows to intensify heat transfer due to an increase in coolant velocity in the drum, provides free access to the internal loading devices chambers C and casing 1 and timely maintenance of the lining of camera 4 and casing 1 in a good condition.

Installation in the initial section (in the course of the movement of the material) housing 1 25

rotary kiln of the inner shell of heat-resistant sheet steel instead of brick lining provides a significant increase in the turnaround time (on average from 3 months to 24 months), reducing the repair time of this section from 48 to 24 hours.

Claims (1)

Invention Formula A rotary kiln containing a lined body, a loading and unloading chambers, a pipeline connecting the loading chamber with a dust-cleaning device and a smoke exhauster, characterized in that, in order to increase the overhaul period of the furnace body lining, its loading end and with a gap relative to the body equal to the thickness of the main lining, the shell length being 1.5-2 times the diameter of the furnace body. Compiled by A. Fortunatov Editor S. Kulakova Tehred M. Morgental Corrector O. Kravtsova Order 1207 Circulation: Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 rfa / 7W. eight