RU2005286C1 - Ring furnace - Google Patents

Abstract

The invention relates to the field of production of ceramic products, in particular to brick kilns. The ring furnace has the form of a torus with an internal segment cut-out, forming openings for loading and unloading bricks and a firing zone diametrically opposite to them. The furnace is equipped with a movable hearth made in the form of separate tapes forming a multi-row transport system for moving bricks, heating and cooling zones are made at both ends of the furnace, and the heating zone simultaneously serves as a cooling zone for fired brick. The firing zone is provided with devices for heating the furnace. 1 C.p. f-ls, 2 ill.

Description

The invention relates to the field of production of ceramic products, in particular to brick kilns.

A known design of an annular furnace containing a heating, firing and cooling zone, a stationary arch and walls, movable under and a step pusher, where the arch and pusher are made in the form of a comb forming a multi-channel system, while the heating and cooling zones are located in the extreme channels, and the zones firing - in the medium. The pusher using the input transverse comb provides movement of the product along the hearth to the center of the furnace 1.

. The disadvantage of this design of the furnace is its complexity, low productivity, high energy costs.

A ring furnace is known, comprising walls, a vault and below with heating, calcining and cooling zones, burner devices located in the walls of the furnace 2.

The furnace operates on the principle of running fire, characterized by difficulty in maintenance, large heat losses.

The aim of the invention is to simplify maintenance, reduce energy costs and increase furnace productivity.

This goal is achieved in that the annular furnace containing walls, arch and hearths with heating, firing and cooling zones, burners placed in the walls of the furnace, is made in the form of bargaining with an internal segment cutout forming openings for loading and unloading products and with diametrically located on the contrary, they have a firing zone, and underneath it is made in the form of separate belts moving towards each other, forming a multi-transport system, the heating zone being combined with the cooling zone.

In addition, it is equipped with heaters located in the fixed arch of the firing zone.

Figure 1 shows a top view of the ring furnace, figure 2 is a cross section of the furnace along aa in fig. 1.

The annular furnace 1 has the form of a torus with an internal segmented cutout 2, forming holes 3 for loading and unloading brick 4, and diametrically opposite

the burning zone 5 located by it. The furnace is equipped with a movable hearth made in the form of separate belts 6 forming a multi-row transport system for moving bricks. At both ends of the furnace, heating and cooling zones 7 are provided, wherein the heating zone serves simultaneously as a cooling zone for the calcined brick. The firing zone 5 is provided with devices 8 for heating the furnace.

An example implementation. The furnace 1 is made in the form of a torus with an outer diameter of 30 m and an inner diameter of 10 m, the width of the arch is 8.4 m, the height of the arch

4 m, belt width 2 m, the number of moving hearth belts - 4, the distance between the belts is 0.18 m, the segment length along the outer torus generatrix is 4 m. The load is carried out through the hole with 3 stacks

1,500 pcs. a brick. There are 100 stacks in the oven at the same time. Bricks 4 in a stack of 1.5x1.5x2 are stacked with heat exchange windows. The belts 6 move towards each other. Complete drying, firing and cooling cycle

brick is carried out in 48 hours. After installation on the movable strip b, brick 4 is dried by heat transfer from the oncoming brick moving from the burning zone 5, while cooling it. By

as it dries, the brick approaches the firing zone 5, the arch of which is equipped with electrically heating devices 8. With other methods of heating the furnace, burner chambers with burners are made in the walls of the firing chamber. Brick firing lasts 4 hours at a temperature of 1100 ° C. The power consumption for starting the furnace is 6 MW, and in the established mode, its consumption is reduced to 2.5-3 MW.

The brick obtained after firing in this furnace has a good texture, smooth surface. It has facing qualities. Compressive and bending strength meets the requirements of GOST 530-80,

in terms of frost resistance and water absorption, it meets the requirements of GOST 7025-78.

(56) 1. USSR Copyright Certificate No. 1037036, cl. F 27 B 13/00. 1984. 2. USSR Copyright Certificate No. 1296814.cl. F 27 B 13/06. 1987.

Claims (2)

SUMMARY OF THE INVENTION 1. RING OVEN containing st. casing, under and with heating, firing and cooling zones, burner devices, characterized in that. in order to simplify maintenance, reduce energy consumption and increase productivity, it is made in the form of a torus with an internal segmented cutout forming openings for loading and unloading products, and with a firing zone diametrically opposite to them, and underneath made in the form of separate belts moving one to meet another, forming a multi-row transport system, the heating zone being aligned with the cooling zone. 2. The furnace according to claim 1, characterized in that it is equipped with heaters located in the fixed arch of the firing zone.