SU10699A1 - Shaft furnace for firing materials at low temperatures - Google Patents

Description

For firing materials such as. gypsum for alabaster, magnesite for oral magnesite, dolomite for caustic dolomite, brown iron and so on. relatively low (not more than 400 ° C) temperatures are used.

We offer shaft furnace, fig. The female in the drawing is a vertical cut, adapted for firing the above materials.

Letters / CJT - marked furnace top; BB-discharge its cone; F-hole for entering sprayed oil; CC-combustion chamber with openings 00 at the hearth, connecting it with the distribution ring chamber PP, NCH-spans for the passage of hot air into the distribution chamber; (7/7) spans for the passage of a mixture of air and oil burning products into the mine and a 7T central pipe with a rosaceous nozzle in the burning zone, evacuating gases using an exhauster to the outside.

In the furnace of such a device. For heating the air, the heat of the already calcined material is utilized, which eliminates the need to introduce a large amount of air into the furnace to lower the temperature of the combustion products in cases where oil is combustible. The firing process itself, in the event that the firing object is gypsum, is carried out

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Pieces of raw gips are loaded into burnt furnace LLt-O, the burned gypsum is automatically unloaded using a Bbt-heavy explosive cone, into a bunker or ya tape and loaded into wagons. The firing is carried out by a low-pressure oil nozzle 0, which injects sprayed oil tangentially into the combustion chamber of the CC. From the combustion chamber of the CC, the combustion products with temperatures below 1200 C get into the distribution chamber of the hot chamber with small holes OO. by air PP,

The path of the air is as follows: it is blown by the fan under the explosive cone. Most of it through the lower edge of the explosive cone penetrates into pieces of the burned-out burnt gypsum; the smaller part through the slit at the top of the cone falls into the central part of the furnace, also into burnt gypsum. Passing through the entire gypsum strata, the air heats up and through the air lines, inside the walls of the narrowing shaft NIII, the hot air enters the distribution chamber PP, where it mixes with the hot products of burning oil. From the distribution chamber of the RR mixture, the mixture of air and products of burning oil at a temperature of about 400 will enter through the PP spans into the mine, for which it is filled with calcined gypsum, and from there through the central tube TT

, Exhausted with exhauster on load; In this way, the furnace is operated by reversed thy.

The fuel for the proposed furnace can serve, in addition to oil, combustible gases (for example, generator gas).

The subject of the patent.

Shaft furnace for burning materials at low temperatures, for example

: gypsum, dolomite, magnesite, and so on, heated by the Nozzles or burners Nomoschi, which is characterized by the ten, that the burning zone of its shaft is surrounded by an annular chamber PP designed to mix hot gases with

warmed air and connected with spans L / 7 with a shaft and spans with SchSch with a dome-shaped lower part of the furnace, which encloses a cone Vb with a gap near its top for release. heated air from under it, and the PP chamber is surrounded, in turn, by the combustion chamber CC, also ring-shaped, having in the outer wall at the top of the holes F for nozzles or burners, and in the lower part of its inner wall - holes for the flue gases in The exhaust gas chamber from the mine is intended to use a TT-tube with a louvre nozzle in the firing zone, venting the gases down to the exhauster. :

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G. 21.

$ 4

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