SU476430A1 - Tunnel oven - Google Patents

Description

one

The invention relates to tunnel kilns for firing refractory, ceramic and other materials.

Tunnel kilns are known to contain a working channel with several longitudinal parallel rows of a charge, trans-sorting devices, roof burners and drag-and-drop devices.

In the known furnaces, it is impossible to obtain uniform but the entire volume of the kiln firing of products, since, with periodic pushing of trolleys in the furnace shaft, the products located next to the burners pagrevyat to a higher temperature than the others; In addition, in these furnaces, if there is only one tina of burners, it is possible to evenly distribute the temperature and gas currents over the cross section of the channel.

The purpose of the invention is to improve the quality of the products to be baked.

This goal is achieved by the fact that the spabjep furnace with arched short- and long-flame burners, and the fuzzy devices are made in the form of vertical, supplied with seals, pipes installed between the rows of the tank.

At the same time, the specified seals, pre-jaws for sealing the furnace ducts, are elastically elastic.

These design features allow for the continuous movement of wagons with products in the furnace channel, evenly distribute the gas flows through the furnace channel and firing sand in different furnace channels with different firing modes in each of them.

Pa figs. I depicts the proposed tunnel sucker; in fig. 2 the same in terms of; in fig. 3 is a section along A-A in FIG. 2; in fig. 4 - view B pa FIG. 2; “And FIG. 5 is a view of B in FIG. 2; pas figs. 6 — node I in FIG. one; in fig. 7 - node P pa of FIG. 2; in fig. 8 - node P1

in fig. 2

Tunnel Nech has two parallel in-line 1 channel 1, in which the heat treatment of products takes place. Channels are separated from each other separating

wall 2 and have a common foundation 3. From above, the channels overlap with arches 4, which are supported by the dividing wall 2 and the outer walls 5. The furnace channels 1 have rail tracks 6 along which trains of cars 7 with rows of products 8 are transported. Before the entrance end of each channel a pusher 9 is installed, which promotes the composition of the waggon with products through the stove drip.

A J-Ia outlet of each furnace channel 1 is equipped with an outlet 10, which causes the carts with articles to be unloaded. Each NORMAL channel 1 has a control corridor 11 for ventilating the high-bay area. Sealing of the inadequate 1 from the control corridor is carried out with an electric shutter 12. The oven channel 1 is conditionally divided into three process zones: heating, calcining and cooling. At the beginning of the preheating zone, there are off-pipes 13 for flue gas firing. In the vault of the zone, the firing zone is set up with noriarno rows of the burner 14 and 15, of which the long flame burner 14 serves to heat the lower rows of the charge and the short-flame burner 15 to heat the upper rows of the charge heat. In the arches of the cooling zones of each channel, there are a number of on-pipes, more on the on-pipe 16, for extracting hot air, and nozzles 17-for supplying cold air to the cooling zone. The connections 13, 16, 17, as well as the burners 14 and 15 are installed in the openings between the pit rolls. In the uninterrupted channels 1, from the inlet and outlet side, there are elastic clampings 18 and 19, which are inclined, respectively, to the nipples 13 and 17, and are not appropriate for the germatization of non-channel channels. Smoke exhauster 20 connected to the connections 13, serves for suction e) 1m gases from the heating zone. the fan 21 serves to feed the air to the burners 14 and 15 and the combustion is injected, and the fans 22 and 23 are intended to suck hot air from the cooling zones and to supply cold air to these zones, respectively.

The furnace works in the following way.

With the established tenl mode of operation, the composition of the trolleys 7 with a series of products 8 pushers 9 Continuously pushes but not in direct channels with the determined speed according to a given mode of those processing. Vagieti 7 with the finished product 8 at the exit of the end channels 1 by the distributors 10 and the unloading. The trains of the carriages 7 in the furnace channels 1 are stopped at the extreme position of the pushers 9 only at the moment of the accelerated reversal of the pushers 9 to their initial position and the next valve is installed for further pushing. Each separate vehicle 7 with a product, with 8, passes successively through the heating, firing and cooling zones, in which the raw material undergoes a series of physical and chemical changes, and turns into finished products.

The burning of the products on the trolleys 7 is made possible by the heat from the combustion of fuel, which is fed into the furnace channels 1 through pairwise laid long-flame and short-flame burners G4 and 15. Through the burners 14 and 15, the burning air is fed into the burning zone and the secondary the air comes to them through the first channel 1 of the cooling zoo.

Crunching in the process of roasting smallpox, is carried out in non-volatile paths between the rows of products 8 and between the walls 2, 5 and {; Dami these products. Combination of short and

Length 11 1: 1 1 1x burners 14 and 15, installed in the vaults of the nechi, provide for a uniform distribution of temperature both for its width and height of the load of products, and for interrupting the movement of the train cars.

the length of the cages.

The furnace temperature in the channels 1 is pe1-fuel consumption and the change in the coefficients of air flow in the burners 14 and 15.

From the burning zones of the nech, the flue gases enter the heating zones, giving their tenlo movement to the products, and then through the pipes 13 they are sucked evenly by the exhaust fan 20.

Cooling of the fired products is carried out with cold air supplied to the cooling zone by the fan 23 through the nozzles 17, and, passing through the furnace cooling chambers, this air is heated by

the IdLia product account is partially sucked off by the fan 22 through the nozzles 16, and the rest of it enters the burning zone as secondary air for burning fuel. In the process of firing, the sealing of the furnace channels 1 along their length is stopped by 1 hydraulic gates 12, and from the ends by elastic seals 18 and 19, which, due to the continuous movement of the carriage 7, are not compatible with the product lines, they are therefore necessary | Ermstichn) cg ne ne1) 1x channels 1 at the entrance and exit.

11 p re d m e t and z o b e t e i u

1. Tunnel blast for firing, for example, ceramic products, contains a working channel with several longitudinal parallel rows of cages, v.) Transportation equipment, arch burners, and these

The devices, which are used for the purpose of improving the quality of the products being burned, are short and long-lined, and the devices of vinolpenes in the form of vertical ones are equipped with fittings installed between the rows of cages.

2. Tunnel nech but p. 1, distinguished: but with the fact that compacted pypol 1epy elSGNCHNN1MI.

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