SU87149A1 - Two-chamber heating furnace - Google Patents

Description

Two-chamber heating furnaces with heated hearths are known, but they are intended for special purposes and cannot therefore be used, while maintaining sufficiently high productivity, for other purposes.

The proposed two-chamber furnace for its intended purpose is universal.

The design of the furnace has the following distinctive features: the furnace wall intermediate between two heating chambers is made with horizontal channels built into it for air cooling; the furnace has hearths heated in both chambers; the furnace is equipped with separate gates for each heating chamber, placed in the respective chimneys, ensuring in all cases independent temperature control of both chambers; The stove is made with arches tangential to the fuel supply direction inclined to the intermediate wall, which ensures the complete combustion of the fuel and the heating of products with the least amount of scale on the surface of the heated billets and parts.

The furnace device shown in the drawing.

The furnace has two heating 1 and 2. communicating with each other by the system of channels 3 and 4. Both heating chambers have bottom 5 and 6, heated from the bottom and ui and pz of heating chambers with combustion products — from the side of the closed chambers 7 and 8 and tangential with respect to to the direction of fuel supply, arches tilted to the intermediate wall 9 between the heating chambers. This wall has horizontal channels 10 for cooling it with air.

The furnace can be heated with liquid or gaseous fuel, which is fed into the heating chambers. With the help of burners, according to 87149-2 -

.w J - V

Meshshimyd a expanding inside the oven channels AND, located in both external outer end walls of the furnace. The furnace is equipped with separate for each heating chamber gates 12 and 13, located in the respective chimneys 5 and 6, as well as flaps, supported on the tables of the sixteen gutter windows.

Combustion products from the bottom of the heating chambers are selected by means of channels 3 or 4, the outlet openings of which are located slightly above the level of the bottom, respectively, in the outer end walls or in one of the outer and intermediate walls.

The outer lining of the furnace is made of insulating, brick, internally-out of the first-grade ground-brick in the upper parts of the laying and the second grade in the lower parts of the laying; the arches of the heating chambers are filled with infusorial earth.

With this device, the furnace can be used: as a two-chamber furnace with chambers of preliminary and final heating and as a double furnace with independent operation of both chambers; as a forging furnace for heating billets for forging or stamping and as a furnace for the heat treatment of billets; for heating blanks for forging or stamping or for heat treating them in both heating chambers, and for heating blanks for forging or stamping in one heating chamber and for heat treating in another heating chamber; as well as for the manufacture of products from machine-grounded steel and parts made of high-quality steel.

When the furnace is operated as a two-chamber chamber with a preliminary and final heating, the fuel is fed through 11 nozzles or burners placed in the channels from one end of the furnace. In this case, the products of combustion come from one chamber — final heating — to the other — preliminary heating — through inclined channels 4 in the intermediate wall 9 and are released into the atmosphere through the chimney of the preheating chamber. The chimney gate of the final heating chamber in this case remains closed completely or partially, depending on the required temperature difference of the heating chambers.

When using the furnace as a dual, with independent operation of both heating chambers, fuel is fed into each chamber from both end walls of the furnace. In order to carry out the independent operation of both heating chambers, it is sufficient to lay bricks for the openings of the inclined channels 4 of the intermediate wall 9 on the side of the heating chamber 2 and to have both slides 12 and 13 open. In this case, the combustion products from the heating chambers are vented to the chamber below the bottom and further to the atmosphere corresponding chimneys 5 and 6.

Subject invention

Claims (7)

1. A two-chamber heating furnace is distinguished in that, in order to ensure its versatility, the furnace is provided with two gate valves built into the chimneys. 2. A two-chamber heating furnace according to claim 1, characterized in that it is performed with heated bottoms of both chambers. 3. Two-chamber heating furnace according to claims. 1 and 2, characterized in that it is made with tangential vaults with respect to the direction of fuel supply. 4. A two-chamber heating furnace according to claims. 1.2 and 3, characterized in that it is made with horizontal channels in the intermediate wall between the chambers for cooling the wall with air. 5.Two-chamber heating furnace according to claims. 1-4, differing in that the supply of liquid or gaseous fuel to the furnace chambers is carried out by means of nozzles or burners embedded in the outer walls. 6. Two-chamber heating furnace according to claims. 1-5, characterized in that the selection of the products of combustion from the furnace chambers is carried out by means of channels embedded in the end external walls slightly higher than the level of the bottom. 7. Two-chamber heating furnace according to claims. 1-6, characterized in that the supply of combustion products from the left chamber to the right and back is carried out by means of inclined ducts embedded in the intermediate wall between the chambers, extending into the right chamber slightly above the bottom level. - 3 -Ns 87149