CS231691B1 - Device for water cooling of doors of industrial furnaces - Google Patents

Abstract

The invention relates to a cooling device doors of industrial furnaces, especially hearth furnaces steel furnaces in both solid and tilting making a hearth. In support frame (2) the oven door is a flow tube (1) Flat Loop Shaped in the direction of flow suction end (3), descending part (9), the transition portion (1C), the ascending portion (11) transfer portions (12) and waste portions (13), the mouth (4) of the suction end (3) is located in the axis of the nozzle by the transfer nozzle J part (12) and is its entrance mouth (4) immersed in water filling (5) containers (6) water supplied (7), while | flow pipe waste section (13) (1) is discharged with its outlet orifice (14) outside the oven door frame (2).

Description

The invention relates to the cooling of industrial furnace doors, in particular hearth steel furnaces in fixed and tilting hearth designs.

Doors of Martin or tandem steel furnaces consist of a load-bearing hollow perimeter frame, intensively cooled by forced cooling water flow, the interior of which is lined with refractory blocks. In the case of ovens with hinged hearths, the door frame is still covered by a water-cooled casing, which prevents the door lining from falling out when the furnace is tilted and improves the cooling of the filling masonry. All cooling systems using pressurized cooling water circulation are complicated for the number of joints and hoses that are quickly destroyed in hot operation and must be replaced very often. In collapsible hearth furnaces, the water-cooled casing wall door is very flawed because the cooling water supply system inserted through the inlet pipe is imperfect and creates numerous heat-shaded areas that cause uneven spatial expansion of the door casing and frame, which therefore the weld joints burst.

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The above-mentioned drawbacks are eliminated by the water cooling of the industrial furnace door according to the invention, characterized in that the furnace door support frame houses a flow loop in the form of a flat loop consisting of the suction end, descending, transition, ascending transfer and waste portions, wherein the mouth of the suction end is located in the axis of the stream of the transfer portion and is submerged through its inlet into the water charge of the vessel fed by the water inflow,

231 991 while the outlet portion of the flow tube is discharged through its discharge orifice outside the furnace door frame.

The water cooling of the furnace door according to the invention has numerous advantages over the known cooling systems. There is no need for a separate pressure source of cooling water and pressure hoses, and the advantageous loop shape allows thermal expansion and loop shape changes, without these deformation stresses affecting the integrity of the flow tube material.

The invention is illustrated by way of example with reference to the accompanying drawing, which shows, in schematic simplification, the installation shape of the flow tube 1 in the furnace door frame 2. The beginning of the flow tube 1 is formed by the suction end 2, which by its inlet 4 is immersed in the water filling 2 of the container 6, which is filled with the water inlet 2 and is provided with an overflow outlet 8.

The suction end 3 is followed by a downward part 9, guided at the peripheral wall of the furnace door frame 6, at the bottom of which the loop of the flow tube 1 passes into a transition part 20 which bends upwards along its second peripheral wall. the edge of the frame 2 passes into the transfer part 12 *, the ^{axis of the} transfer part 12 is always at the level of the suction mouth 4, the transfer part 12 of the flow tube 2 is connected to its waste part 21 whose mouth 14 extends outside the furnace door frame 2.

Water inflow container 2 filled with water 6 and the inlet opening Science £ fills the suction end 2 · Water gradually fills the flow tube 2 ^and the outlet 15 from the discharge orifice 14 diverted into a collecting trough 16, wherein it is preferably possible simultaneously to a collection trough 16 to supply outlet from overflow outlet 8.

The loop portion formed by the outlet portion 13 of the flow tube 2 ^{in the} described embodiment extends into the central portion of the furnace door frame 2 and thus greatly improves the cooling of the exposed portion of the furnace door.

Claims (1)

/ rro Water cooling of industrial furnace doors » that in the furnace door support frame (2) there is a flat loop flow tube (1), consisting in the direction of flow of cooling water from the suction end (3), downward part (9), transition part (10), ascending part (11) ) of the transfer part (12) and the waste part (13), the mouth (4) of the suction end (3) being located in the axis of the flow line of the transfer part (12) and immersed in the water filling (5) container (6) fed by a water inlet (7), while the waste portion (13) of ^the whip flow tube (1) is discharged through its discharge orifice (14) outside the furnace door frame (2).