SU89050A1 - Recuperative pot or glass furnace bath - Google Patents

Description

Despite its great advantages, pulverized coal heating in glass making has not been widely used for the following reasons: a) the rapid destruction of the refractory masonry of the chamber, due to the high temperature obtained from the combustion of coal dust; b) the absence of a separate combustion chamber (furnace) for burning pulverized fuel in the existing glass-making furnaces; and c) the short service life of the combustion chamber of existing furnace designs due to the destruction of the chamber by liquid slag.

The proposed recuperative pot or glass melting furnace bath with pulverized coal heating not only eliminates the aforementioned drawbacks, but also allows one to achieve some economic advantages.

A distinctive feature of the proposed furnace is that the burning ached occurs mainly in a special chamber, in which more of the ash and slag falls. In order to protect the refractory chamber from destruction by ash suspended in, the temperature of the latter is reduced by supplying only part of the air necessary for the mountain and the chamber.

as well as an additive to the ash deposited in the chamber of the chamber or of fluxes lowering their melting temperature. The furnace allows the use of liquid fuel slag for the manufacture of various products and the utilization of part of the waste gases from the furnace space for heating the working part of the furnace, drying the carbonaceous dust and for other production needs.

FIG. 1 shows a longitudinal section of a bath furnace; in fig. 2 - its -origonal section along / - /; in fig. 3 - transverse section along // - //; in fig. 4 is a cross-section along /// - ///.

The grinded and dried coal dust of a conventional method for heating the furnace is fed from the hopper to the burners using compressed air.

Burners 2 are installed in any quantity in the combustion chamber (firebox) / so that the tongues of the flame intersect at an angle. This results in the rotation of the flame, which prevents the torch from washing the masonry and contributes to a better deposition of unburned particles of coal dust. From the chamber / flame, through passage 4, it is directed to glass-melting bath 5. Heated secondary air is supplied to the flare partially or completely behind the furnace, in order to reduce the temperature in it.

Due to the fact that the liquid slag destroys the laying of the furnace, fluxes, such as blast-furnace slags, various minerals, glass breakage, etc., are supplied to the combustion chamber / through MO, 3. The fluxes reduce the temperature in the combustion chamber and, mixing with the slag , reduce its harmful effect on the laying of Yechi.

The slag molten in the combustion chamber is run down the chute and can be used for processing into insulating wool or other products depending on the properties of the slag and fluxes.

The working part 8 of the bath is separated from the glass melting bath 5 by a wall 7 with windows. The mixture for glass melting is loaded into the bath through the furnace at 10.

The arrangement of the chimneys in the bath furnace (as well as in the pot furnace) is carried out in various ways. In FIG. 1-4 structures, the hot gases move in bath 5 to wall 7, after which they enter chimneys 6 and 9.

Exhaust gases moving through the chimney 6 are used to heat the secondary air in the heat exchanger 12. The heated air is supplied through the duct 13 to the passage 4 between the furnace and the bath furnace 5. The exhaust gases are discharged from the heat exchanger to the chimney through the duct 14.

The flue gases flowing through the chimney 9 can be used to heat the cooling zone of glass products, dry coal dust or for other purposes.

The principle underlying the design of the described bath furnace is applicable to pot furnaces.

Subject invention

Claims (5)

1. A pot recuperative or glass melting bath in a pulverized coal heating, characterized in that, in order to maintain the proper quality of the glass melt, the furnace has a separate chamber for burning yi-ol dust, in which most of the ash falls out of the flame and slags. 2. A method of operating the furnace according to claim 1, characterized in that, in order to increase the life of the refractory masonry chamber, the temperature of the flame in the chamber is reduced by supplying only part of the air required for combustion to the chamber. 3. The method of operation of the furnace according to paragraphs. 1 and 2, characterized in that, in order to lower the melting temperature of the ash and slag, a flux is added to the chamber. 4. The method of operation of the furnace according to paragraphs. 1, wherein, in order to save fuel, part of the gases from the furnace space to the heat exchanger is sent to dry the coal dust, preheat the fuel section of the furnace and other production needs. 5. The method of operation of the furnace according to paragraphs. 1 and 4, characterized in that the liquid slag is used for the manufacture of various products. 2 / FIG. 2 to 0 to to and and in d sh 3 in in in in about Q e о g QQ g Q