CS195641B1 - Method of heating glass melting furnaces - Google Patents

Description

The invention relates to a method for heating glass melting furnaces in which the flame is produced by means of burners consisting of upper ports for preheated combustion air and gas nozzles placed therein, through which natural gas is led from below to the preheated combustion air.

By using rich gases, mainly natural gas, to heat glass melting furnaces, the heating method has changed in the sense that instead of brick burners with a bulkhead supplying preheated combustion air and gaseous fuel, masonry combustion air entrances have started to be used. gaseous fuel was supplied either from above, from the hillside or from below, such as e.g. written in V. Mainer's publication Glass Furnaces / SNTL 1967 / p. 167th

A disadvantage of these methods is that the preheated combustion air has a natural tendency to flow upwardly below the furnace crown and the cold natural gas supplied from the nozzle from below has a tendency to naturally flow downwards, i. on enamel. Since the combustion air and gas are fed into the furnace almost simultaneously, the mixing, and hence the combustion, especially at the surface, is imperfect. In the case of incomplete combustion, there is a reduction burning in the furnace, which adversely affects the construction and thus the service life of the furnace.

These disadvantages are overcome or substantially reduced by the method according to the invention, which consists in that the natural gas is conducted in at least one pair of streams rotating in opposite directions towards each other.

The advantages of this method lie mainly in the fact that the gas from the pair of nozzles rotating towards each other sucks in the incoming combustion air from the upper part of the furnace, which leads to perfect mixing and hence to combustion in the whole glass furnace and especially on the glass surface. Perfect combustion results in a considerable saving of natural gas during glass melting, the melting performance is increased and the service life of the entire furnace construction is also extended.

An exemplary embodiment of the invention is described further and schematically shown in the accompanying drawings, in which FIG. 1 shows a longitudinal section through the melter, FIG. 2 shows a cross-section in the line A - A of FIG.

and _in FIG. 3 shows a longitudinal section through a gas nozzle.

The furnace consists of a furnace space 1, an exhaust duct 2, a recuperator 3, burner ports 4 and gas nozzles 5 arranged in pairs. Each nozzle consists of its own body 7 / FIG. 3), a regulating needle 8 and a virgin, the nozzle 5 having a left-hand rotating vortex 9 and the nozzle having a right-hand rotating vortex 10.

Preheated combustion air enters the furnace chamber 2 from the recuperator 3 via burner ports 4. At the same time the furnace areas ^t ru 2 The feed gas by a pair of nozzles d5, 6 .. upstream of the gas rotates and sucks the hot combustion air from the top of the furnace chamber J_ and the mixture is transferred to the liquid level. The flue gases from the furnace chamber 2 pass through a duct 2 into the recuperator 3j from where they enter the chimney.

The method is mainly intended for glass melting furnaces with a long flame, but it can also be used with other types of furnaces with a nozzle inlet arrangement.

Claims (1)

A method of heating glass melting furnaces, in which the flame is produced by means of burners consisting of upper ports for pre-heated combustion air and gas nozzles placed thereunder From below, natural gas is supplied to the preheated combustion air, characterized in that the natural gas is conducted in at least one pair of streams rotating in opposite directions to each other.