RU29992U1 - Tunnel kiln - Google Patents

Description

The utility model relates to the production of ceramic ware, in particular when firing raw brick, and can be used in brick factories that require rational use of hot air from the cooling zone of a tunnel kiln.

Known tunnel kilns made according to standard projects 409-21 -5, 409-21 13, etc. (1).

The tunnel kiln was chosen as the closest analogue according to the standard project 409-21-8 (2), which is a direct channel formed by brick walls and a ceiling in the form of a vault. The burning channel is conditionally divided into three technological zones of preparation, firing and cooling along the rail WAYS of the burning channel move the trolleys with the charge of the fired products to meet the coolant.

In the preparation zone, the products are dried and heated, products of combustion leaving the firing zone. In the firing zone, products are exposed to high temperatures. In the cooling zone, products and trolleys are charged with atmospheric air, pumped by the fan at the exit point of the trolleys. Heat products enter the dryer through the technological windows in the wall of the tunnel kiln, cooling zone and then through the exhaust fan through an air duct made in the form of heat-insulated pipes The disadvantages of this design are:

-heat loss during the passage of heat products through the duct, especially in the cold time of the day or year. In winter, heat loss reaches up to 40 °, -a small amount of heat products passing through the duct, which only

IPC F 27 V 9/26

two of the four blocks of the drying compartment;

-limitation of the temperature of heat products coming from the cooling zone to

exhaust fan, as bearings fail.

The proposed utility model solves all three problems: heat conservation, increasing the volume and temperature of heat products, due to the accumulated heat of the firing zone.

To achieve the specified technical result, the heat-insulated pipe passing along the tunnel kiln and the exhaust fan are removed. A second set is made over the tunnel kiln arch. The distance between the arches is designed to pass the volume, the value of which is sufficient to provide the heat products of the entire drying compartment.

The proposed tunnel kiln is illustrated in the drawing of FIG. 1-3.

In FIG. 1 - shows a general view of the tunnel kiln.

In FIG. 2 is a top view of a tunnel kiln.

In FIG. 3-cross section of a tunnel kiln.

The tunnel kiln contains a direct channel (1), formed by walls (2) and overlapping in the form of a vault, the first (3) and second (4), a newly formed channel (6), a rail track (5), along which the trolleys with the firing object ( fsh. 3). The burning channel is conditionally divided into three technological zones of preparation (A), firing (B) and cooling (C) (Fig. 1). In addition, the tunnel kiln contains a veptilator (9) and an air duct (7), as well as a heating system (8) (Fig. 2).

The operation of the tunnel furnace is as follows. The object of firing on trolleys is fed into a direct channel, into the preparation zone, where it is heated by the combustion products coming from the burning zone. Then it moves to the burning zone under the influence of high temperatures. Then the firing object enters the cooling zone. From the cooling zone, heat products enter the channel between the arches into the drying compartment, due to the vacuum created by the fans of the dryer. Passing through the channel between the arches, above the firing zone, the heat products are heated by heat accumulated through the lower arch.

Sources of information:

1. Kashkayev IS, Sheinman E.Sh., Production of ceramic bricks: a Textbook for preparatory workers in the production - 4th ed., Rev. and additional M Higher. school., 1983-223s., IL - (Vocational education). 2. Typical project. 409-21-8.

Utility Model Formula

A tunnel furnace containing a direct channel formed by walls and overlapping in the form of a vault and conditionally divided into zones of preparation, firing and cooling, a heating system, characterized in that the channel is closed in the form of a double vault, forming a channel through which heat products are supplied from the cooling zone , heating them through the arch above the firing zone, in the drying compartment.

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Claims (1)

A tunnel furnace containing a direct channel formed by walls and a ceiling in the form of a vault and conditionally divided into zones of preparation, firing and cooling, a heating system, characterized in that the channel is closed in the form of a double vault, forming a channel through which heat products are supplied from cooling zones, heating them through the arch above the firing zone, to the drying compartment.