SU88204A1 - The method of cooling elements of open-hearth furnaces and device for implementing the method - Google Patents

Description

The invention relates to a method and apparatus for cooling individual structural elements (nozzle bodies, working window frames, raised beams) open-hearth furnaces.

Various methods and devices for this purpose are known.

The hook, for cooling a very large number of open-hearth furnaces, uses water coming from the water supply network, which causes high operating costs.

Distinctive features of the proposed combined method and device for its implementation is the use of water for cooling elements of open-hearth furnaces previously used for cooling in other devices, for example, in air compressors, in steam condensers, etc., and heated to about 25 -35 ° C.

The advantages of the proposed combined cooling method and the usefulness of its application in industry consist in a significant reduction in operating costs by about 35% compared with the method of separate cooling open-hearth furnaces and other devices.

The device - in the form of a piping system with appropriate instrumentation and fittings - is shown in the drawing.

The piping system includes:

main pipe / parallel wiring 2 for supplying fresh or circulating water previously used for cooling in other devices, for example, in air compressors, in condensers of steam installations 5;

No. 88204

collecting pipeline 4 with parallel connections 5 of water previously used for cooling in other devices, and with parallel distributing 6 of this water to cooled elements 7, for example, nozzle bodies and 8 frames of openings for open-hearth furnaces;

return pipe 5c with parallel connections JO and L for removing water from the system previously used for cooling in other devices if it cannot be used for cooling in open-hearth furnaces and for removing water (fresh or circulating) when it cannot be used for cooling in other devices;

collecting conduit 12 with connections parallel to it -5 for removing water used for cooling open-hearth furnaces;

reserve pipeline M with parallel wiring 15, designed to supply fresh or circulating water to the cooled elements of open-hearth furnaces in the event of a temporary cessation of the supply of water to them from the collecting pipeline 4.

The piping system is complete. with the following test instruments, devices and valves:

with thermometers for measuring the temperature of water 16 on the main pipeline, 17 at connections 5 to the collecting pipeline 4 and 18 on the collecting pipeline 12;

with manometers for measuring the pressure of water 19 on the main pipeline 1 and 20 on the collecting pipe 4;

with built-in water several meters higher than the upper water level in the elements of open-hearth furnaces located in connections 5, siphon tubes 21 and check valves 22;

communicating with the siphon tubes 21 and the connections 5 by means of the valves 23 with control drain funnels 24;

with shut-off valves 25 on the collecting pipe 4, 26 and 27 on the spare pipe 14; with three-way water wounds 28 on parallel wiring 2 and drain funnels 29 on parallel connections 13 to the collecting pipeline 12.

The installation of valves in front of the cooled frames of the filling windows of the open-hearth furnace is not mandatory. The distribution of water between the individual frames can be done either by selecting the diameter of the supply pipes or by flattening the ends of the pipes.

In case of successive use of water for cooling other indicated devices and open-hearth furnaces under normal conditions of operation of the system, valves 23 in the 24 tubes supplied to the control funnels are opened so that the water flows to the control funnels with a small stream, no more than, for example, 5 mm diameter.

The presence of built-in several meters above the upper water level in the cooled elements of open-hearth furnaces located in connections 5 to the collection pipeline 4 siphon tubes 21 with check valves 22 and valves 23 in them and the presence of control drain funnels 24 provides for maintaining pressure in the collection pipeline 4 sufficient for the normal supply of water cooling system and other devices and open-hearth furnaces, and the ability to remove, if necessary, water from other devices.

In case of repair of open-hearth furnaces (if there is no need for water to cool them), the pipe sections in front of the drain funnels 24 must be designed to pass all the amount of water into the return pipe 9.

Subject invention

Claims (4)

1. A method of cooling elements of open-hearth furnaces, characterized in that, in order to reduce operating costs, cooling is carried out in an open-loop system using water previously used for cooling in other devices and in them heated. 2. A method according to claim 1, characterized in that the cooling elements of the open-hearth furnaces are carried out in a closed (circulation) system using pre-cooled cooling towers or pools with sprinklers of recycled water. 3. A device for carrying out the method according to claim 1, characterized in that it is made in the form of a piping system comprising: a main pipeline with parallel wiring for supplying fresh water previously used for cooling other devices; collecting pipeline with parallel connections of water previously used for cooling other devices and with parallel wiring to elements of open-hearth furnaces; return pipe with parallel connections for removal from the system of water previously used for cooling in other devices, in case of temporary impossibility of its use in open-hearth furnaces and for removing fresh water, in case of impossibility of its use for cooling in other devices, collecting pipeline with parallel connections to remove water used to cool open-hearth furnaces; a spare pipeline with parallel wiring for supplying fresh water to the cooled elements of open-hearth furnaces, in the event of a temporary cessation of water supply from the collecting pipeline. 4. The device according to claim 3, characterized in that it is equipped with the following instrumentation and fittings: thermometers for measuring the temperature of fresh water and water used for cooling other devices; pressure gauges for measuring pressure on the main and collecting pipelines; siphon tubes at the connections to the collecting pipeline; communicating with siphon tubes by means of valves by control funnels, drain funnels on the taps of the cooled elements of open-hearth furnaces and shut-off valves on the inlets to the cooled elements of open-hearth furnaces and on the assembly and return pipelines. No. 88204 / 7 ge