SU313785A1 - THERMAL PROCESSING OF SHEET GLASS - Google Patents

Description

The invention relates to devices for heat treatment and can be used in the building materials industry.

Famous furnace for heat treatment of sheet glass, containing a roof with flat-flame burners, side walls, under, transporting device, smoke channel.

In such structures, heat exchange is inefficiently organized, ultimately caused by the low thermal stresses of the furnace space, and the specific fuel consumption is overestimated.

The purpose of the invention is to reduce specific fuel consumption.

This is achieved by the fact that the furnace is made with a hearth inclined at an angle of up to 45 °, above which nozzles are arranged at an angle of up to 30 ° C.

The drawing shows schematically a furnace, a cross-section.

Heating is carried out by flat-flame burners 1 installed in roof 2. Due to the use of flat-flame burners, the roof of the furnace {suspended or arched) can be brought closer to the surface of the heated material 3 transported along the rollers 4.

are placed along the length of the furnace and are connected by a common bore 6, which through the channel 7 is connected to the exhaust pipe. Under 8 ovens from both sides inclined to the center (angle of inclination up to 45 °). In the side walls 9, air nozzles 10 are installed at a small angle to the inclined surfaces of the hearth (up to 30 °), through which air is supplied in accordance with the stoichiometry for the afterburning of products of incomplete combustion.

To increase fuel efficiency, increase the effective temperature of the radiated vault, a heat exchanger 11 is installed in channel 7, heating up

air entering the combustion.

The specificity of the aerodynamics of a flat-flame burner furnace is such that both burning gases and combustion products move in a thin layer along the roof and side walls (as shown by arrows) to the hearth of the furnace 8. In the kiln, the gas is combusted with an air excess (consumption) ratio of less than one to produce products of incomplete combustion. Incomplete Products Move

along the arch and side walls to the hearth.

Hot air jets fed through nozzles 10 at a small angle to inclined surfaces eject incomplete combustion products. At the same time, the last burn out

As a result, the surface becomes an additional source of heat transfer to the heated product.

Subject invention

Oven for heat treatment of sheet glass containing a flat-vault roof

burners, side walls, under the transporting device, a smoke channel, characterized in that in order to reduce specific fuel consumption, it is made with a hearth inclined at 45 °, above which nozzles are located at an angle of up to 30 °.

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