CN210314334U - Water spraying structure for bottom plate of airtight box - Google Patents

Abstract

The utility model provides an airtight box bottom plate water spray structure, including airtight box, condenser tube, nitrogen gas emergency cooling pipe and bottom plate spray pipe. The cooling water pipe is used for cooling the bottom plate of the airtight box under the conventional condition; when the cooling water pipe cannot be cooled quickly, the nitrogen emergency cooling pipe is started to cool; when the cooling water pipe and the nitrogen emergency cooling pipe are simultaneously opened or cannot be rapidly cooled, the bottom plate water spraying pipe is simultaneously opened for cooling. The bottom plate water spray pipe comprises a first valve, a second valve, a third valve and a nitrogen inlet pipeline. The bottom plate water spray pipe can not only enable the gas and the water to be mixed to form an atomized state to spray the bottom plate of the airtight box, so as to achieve the effect of rapid cooling, but also can flow to the outside along the third valve once water leaks due to the design and installation of the third valve, so as to avoid the phenomenon that water enters a blast furnace to cause fuel consumption rise and abnormal furnace conditions.

Description

Water spraying structure for bottom plate of airtight box

Technical Field

The utility model relates to a water-cooling technical field especially is used for blast furnace to have the airtight case water-cooling of bell-less furnace top, specifically is an airtight box bottom plate water spray structure.

Background

The top temperature of the blast furnace is always the upper part of the blast furnace, the top temperature can directly cause the temperature of the bottom plate of the airtight box to rise, when a cooling water pipe in the airtight box can not be cooled quickly, a water atomization device of the bottom plate is started, because the method is that water mist is directly sprayed to the bottom plate of the airtight box, water flows into the furnace along the bottom plate, so that the blast furnace production can only be started for 20 minutes, and the long time can influence the blast furnace production. The atomized water device is controlled by two manual ball valves, and water is sprayed into the sealed airtight box, so that if the valve leaks or is operated by mistake, water leakage can be caused, and the condition cannot be found.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the technical problem that water leakage cannot be found due to valve leakage or misoperation and the like in the state that the atomized water device is not started is solved.

The utility model provides a water spraying structure for the bottom plate of an airtight box, which comprises an airtight box, a plurality of cooling water pipes, a nitrogen emergency cooling pipe and a bottom plate water spraying pipe; a plurality of cooling water pipes are uniformly distributed and installed on the periphery of the bottom plate of the airtight box, and the nitrogen emergency cooling pipe and the bottom plate water spray pipe are arranged on the airtight box in a diagonal line manner; the bottom plate water spray pipe comprises a first valve, a second valve, a third valve and a nitrogen inlet pipeline; the nitrogen inlet pipeline is arranged at the bottom of the bottom plate water spraying pipe; the first valve and the second valve are connected through a pipeline, and the third valve is connected between the first valve and the second valve. Under the condition that the bottom plate water spray pipe is not opened, the first valve and the second valve are kept in a normally closed state, the third valve is kept in a normally open state, once water leaks, the water flows to the outside along the third valve, water can be timely found and can be prevented from entering the blast furnace, and fuel consumption rising and furnace condition abnormality of the blast furnace due to water leakage are avoided.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the optimized structure of the water spraying facility of the bottom plate of the airtight box of the present invention;

in the figure: 1 is a gas-tight box, 2 is a cooling water pipe, 3 is a nitrogen gas inlet pipe, 4 is a bottom plate water spray pipe, 9 is a nitrogen gas emergency cooling pipe, 5 is a first valve, 6 is a second valve, 7 is a third valve

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, the utility model provides a water spraying structure for the bottom plate of an airtight box, which comprises an airtight box 1, a cooling water pipe 2, a bottom plate water spraying pipe 4 and a nitrogen emergency cooling pipe 9; the floor spout 4 includes a first valve 5, a second valve 6, a third valve 7 and a nitrogen inlet conduit 3.

When the blast furnace continues to have high top temperature, the temperature of the bottom plate of the airtight box 1 is increased along with the high top temperature. When the temperature of the bottom plate of the airtight box 1 reaches 90 ℃, alarming is carried out, the sufficient water flow of the cooling water pipes 2 is ensured, and the flow of each water pipe reaches 3m³And h, opening a valve of the nitrogen emergency cooling pipe 9 for emergency cooling when the temperature difference of the inlet and outlet water is lower than 5 ℃, closing the third valve 7 when the temperature of the bottom plate reaches 120 ℃, opening the first valve 5 and the second valve 6, and spraying water to the bottom plate to implement atomized water cooling. The water used for lowering the temperature will flow along the floor into the furnace and therefore the operation can only be used for 20-30 minutes, the first valve 5 and the second valve 6 are closed, the third valve 7 is opened and the chute must be stopped from rotating and placed in a vertical position if the temperature cannot drop yet.

In the normal production process, the first valve 5 and the second valve 6 are in a closed state, the third valve 7 is kept normally open, and even if water leaks due to manual misoperation or leakage of the first valve 5 and the second valve 6, the leaked water can flow out of the third valve 7 and cannot enter the blast furnace, and meanwhile, the problem that the leakage cannot be found is solved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (1)

1. A water spraying structure for a bottom plate of an airtight box comprises the airtight box (1), a plurality of cooling water pipes (2), a nitrogen emergency cooling pipe (9) and a bottom plate water spraying pipe (4); the plurality of cooling water pipes (2) are uniformly distributed and installed around the bottom plate of the airtight box (1), and the nitrogen emergency cooling pipe (9) and the bottom plate water spray pipe (4) are diagonally arranged on the airtight box (1); the method is characterized in that: the bottom plate water spray pipe (4) comprises a first valve (5), a second valve (6), a third valve (7) and a nitrogen inlet pipeline (3); the nitrogen inlet pipeline (3) is arranged at the bottom of the bottom plate water spraying pipe (4); the first valve (5) and the second valve (6) are connected through a pipeline, and the third valve (7) is connected between the first valve (5) and the second valve (6).

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