SU89005A1 - The device heads open-hearth furnaces - Google Patents

Description

The best head of open-hearth furnaces is such a head, in which gas and air are supplied by many struykamn with high input speeds.

Industrial heads of open-hearth furnaces have the essential disadvantage that they do not meet this requirement.

The proposed and described below device heads of open-hearth furnaces do not have this drawback.

The head arrangement is shown in FIG. 1 in horizontal section; in fig. 2 shows a vertical section of the slags and a vertical channel along the line / - / Fig. one.

The heads are arranged as follows. The working space / furnaces are connected to gas 2 and air 3 slags by two ways: through a span 4 of a large cross section and vertical channels 5 and 6 and through a span 7 and S of a small section and vertical channels 9 and 10.

The spans are made with such small cross sections as is necessary to obtain high gas and air velocities at the exit from the heads into the working space.

In vertical channels and build in dampers (gates) 11 to 12.

The same dampers can also be used to close spans or vertical channels 9 and 10. However, the appropriateness of their use for adjusting in individual spans or channels 9 and 10 the amount and velocity of gas and air entering through the working space into the working space can only be installed experimentally.

The dampers must ensure the most tightness of the ceiling. If necessary, second flaps 13 can be installed below these flaps, and the products between them can be fed into the space between them at such a pressure that the gas in the vertical channel 5 can have.

N ° 89005-2 -

Heads work as follows. When gas and air are supplied through them from the generators into the working space, vertical channels 5 to 6 are closed with gates 11 and 12. Gas and air heated to temperatures not higher than 1200-1300 ° C will flow through channels 9 and 10 and small sections 7 and S at high speed, different for gas and air and higher for air.

After the valves are removed after the valves are removed through the heads of the combustion products, the flaps 1J and 12 are pulled out of the vertical space 5 from the vertical channels 5 and b, and the burning products will be removed through the passage of large section 4 and the vertical channels 5 and 6, as well as through small spans sections 7 and S and channels 9 and 10.

The bulk of the combustion products will be removed along the path of least resistance through the passage of a larger cross section 4 and vertical channels 5 and 6. The possibility of overheating under these conditions of small cross sections 7 and 8, cooled when gas and air are supplied through them, is ensured The shape and size of the spans throughout the entire campaign of the furnace.

To speed up the repair, the part of the heads, including the spans, can be made in the form of a removable structure. Slag mills are obtained elongated, which makes it possible to carry them out with an additional nozzle for additional cleaning of the combustion products from slag, preventing the upper rows of nozzles of regenerators from clogging.

The device described above is characterized by the following advantages:

with more perfect mixing of gas and air in the working space of the furnace, a high-temperature short and n-flame flame is obtained, most effective in terms of heat transfer from the flame to the metal bath;

with more perfect mixing of gas and air, the combustion of the gas ends in the first half of the working space, which excludes the possibility of premature wear of the heads that are overheated, and when the gas is burned out in the air, the removal of the heads;

By eliminating the possibility of concentrating the currents of the combustion products, the possibility of disassembling the currents when they are stressed on the vanilla mirror with the formation of fires directed to the walls and under the tongue of the flame of high temperature is excluded;

It is possible to supply gas and air into the working space at high speeds, and to remove combustion products at low speeds with the correct distribution of combustion products between gas and air registers.

The subject is invented and

Claims (3)

1. Arrangement of heads of open-hearth furnaces operating on gaseous oil, characterized by the fact that, in order to ensure the supply of air and gas to the working system, high output speeds and to remove burning products from the working space at low speeds, as well as to increase of the working space of the lining of the working space, extending the yoke of the service of the nozzles of regenerators and increasing the productivity of open-hearth furnaces,: -the tails on each side of the furnace have: a) a large number of narrow-small sections of gas and air-1 spans located one between the other at the same level across the entire width of the working space; b) vertical channels of rectangular cross section communicating with narrow - small cross sections of gas and air spans; c) one located above the airway and gas spans across the entire width of the working space is a curtain of a larger cross section bent in the direction of the casting span; d) two vertical channels, of square cross section and of various sizes, communicating with a large cross section smoke passage; e) two dampers (two dampers) in vertical channels of square section; e) elongated slag stone in the direction of the casting span. 2. A device according to claim I, characterized in that it is made with an additional nozzle in slags and with separate valves for vertical channels of rectangular cross section. 3. The device according to paragraphs. 1 and 2, characterized in that the head part, including the spans, is in the form of a removable structure. 9 S 8 7 . FIG. 1-1