Cleaning device for blast furnace soft water closed circulation system

Abstract

The utility model discloses a cleaning device for a blast furnace soft water closed circulation system, which comprises a cooling wall arranged on the outer wall of a blast furnace, the cooling wall is provided with an inner cavity, the lower end of the inner cavity of the cooling wall is connected with the output end of a cooling water supply pipe, and the upper end of the inner cavity of the cooling wall is connected with the input end of a cooling water return pipe; a cleaning water pipeline is connected beside the cooling water return pipe, and a booster pump and a bypass valve are sequentially connected to the cleaning water pipeline in the flowing direction of cleaning water; a blow-off pipe is connected beside the cooling water supply pipe, and a blow-off valve is arranged on the blow-off pipe. According to the cleaning device for the blast furnace soft water closed circulation system, welding slag and other sundries in a blast furnace water system pipeline can be cleaned more efficiently.

Description

Technical Field

[0001] The utility model relates to the field of blast furnace soft water closed circulation system, in particular to a cleaning device used for blast furnace soft water closed circulation system. Background Art

[0002] Modern blast furnaces are cooled with a closed soft water circulation system, and the cooling staves are connected in a "one-to-top" manner, which means that the soft water used for cooling is supplied from the lowest point of the cooling stave and returned from the highest point of the cooling stave. Before the blast furnace is started, the water system of the blast furnace must be thoroughly flushed to clean the welding slag and other small debris left in the pipeline during the construction process. When flushing, it is required that the flushing water be supplied from the highest point of the cooling stave and discharged from the lowest point of the cooling stave, so that the gravity of the water can be used to generate a flow rate for flushing the pipeline.

[0003] However, if the flushing work before the blast furnace is started is carried out from low to high using the original water supply method, the welding slag and other debris in the pipeline cannot be completely cleaned due to the weak effect of water gravity. Utility Model Content

[0004] The utility model aims to provide a cleaning device for a blast furnace soft water closed circulation system, which can clean welding slag and other sundries in the blast furnace water system pipeline more efficiently.

[0005] To achieve the above-mentioned purpose, the utility model provides a cleaning device for a blast furnace soft water closed circulation system, comprising a cooling wall arranged on the outer wall of the blast furnace, wherein the cooling wall is provided with an inner cavity, wherein the lower end of the inner cavity of the cooling wall is connected to the output end of a cooling water supply pipe, and the upper end of the inner cavity of the cooling wall is connected to the input end of a cooling water return pipe; a cleaning water pipeline is connected next to the cooling water return pipe, and a booster pump and a bypass valve are sequentially connected to the cleaning water pipeline along the flow direction of the cleaning water; a sewage pipe is connected next to the cooling water supply pipe, and a sewage valve is provided on the sewage pipe.

[0006] As a further improvement of the utility model, a guide protrusion is provided on the inner cavity side wall of the cooling wall, and the guide protrusion is spiral-shaped; the connection between the cooling water return pipe and the inner cavity of the cooling wall is a cleaning water output hole, and the water outlet direction of the cleaning water output hole is tangent to the outer wall of the inner cavity of the cooling wall, and the water outlet of the cleaning water output hole is directed toward the side of the guide protrusion inclined downward; the water outlet direction of the cleaning water output hole is arranged horizontally.

[0007] As a further improvement of the utility model, the guide protrusions are provided on both the inner wall and the outer wall of the inner cavity of the cooling wall, and the rotation directions of the guide protrusions on the inner wall and the outer wall of the inner cavity are the same.

[0008] As a further improvement of the present invention, the inner cavity of the cooling wall includes an inverted cone-shaped inner cavity located in the middle thereof.

[0009] As a further improvement of the utility model, the cooling water supply pipe is connected to at least two parallel soft water pipes, each soft water pipe is connected to a soft water circulation pump and a first valve in sequence along the water flow direction, and a second valve is provided on the cooling water supply pipe between the soft water pipe and the sewage pipe.

[0010] As a further improvement of the utility model, a third valve is provided on the cooling water return pipe, and the connection between the cleaning water pipeline and the cooling water return pipe is located between the third valve and the input end of the cooling water return pipe.

[0011] Beneficial Effects

[0012] Compared with the prior art, the cleaning device for the blast furnace soft water closed circulation system of the utility model has the following advantages:

[0013] 1. When the cleaning water is injected into the upper end of the inner cavity of the cooling wall through the cleaning water pipe, the flow rate of the cleaning water is accelerated by using a booster pump, so that the welding slag and other debris in the blast furnace water system pipe can be cleaned more efficiently. The cleaning water in the cooling wall enters the cooling water supply pipe from the bottom of the cooling wall and is discharged from the sewage pipe.

[0014] 2. The water outlet direction of the cleaning water output hole is tangent to the outer wall of the inner cavity of the cooling wall. The inner cavity side wall of the cooling wall is provided with a spiral guide protrusion. When the cleaning water is ejected from the cleaning water output hole, it helps the cleaning water to form a vortex in the inner cavity of the cooling wall. Without increasing the number of cleaning water output holes and the water output, the contact area between the cleaning water and the inner and outer walls of the inner cavity of the cooling wall is increased, and the cleaning efficiency of welding slag and other debris is improved. The spiral guide protrusion plays a certain role in guiding the cleaning water, prolonging the time that the cleaning water flows in the inner cavity of the cooling wall in a vortex manner.

[0015] 3. After the cleaning water enters the inner cavity of the cooling wall, the effect of the water pressure will gradually decrease. In order to ensure that the cleaning water still has a high flow rate in the lower half of the inner cavity of the cooling wall to maintain the vortex form, an inverted cone inner cavity is set in the middle of the inner cavity of the cooling wall. The water flow in the inverted cone inner cavity gradually decreases due to the gradual decrease in the rotation radius, similar to a vortex. The faster the flow rate is, the smaller the pressure is, forming a pressure difference, making it easier for welding slag and other debris to be sucked down by the vortex, thereby improving the cleaning effect.

[0016] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a front sectional view of a cleaning device for a blast furnace soft water closed circulation system;

[0019] Figure 2 for Figure 1 A partial enlarged view of

[0020] Figure 3 It is a partial development diagram of the outer wall of the inner cavity of the cooling wall;

[0021] Figure 4 This is a top view of the cooling wall. DETAILED DESCRIPTION

[0022] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0023] Example

[0024] The specific implementation of the utility model is as follows Figures 1 to 4 As shown, a cleaning device for a blast furnace soft water closed circulation system comprises a cooling wall 2 arranged on the outer wall of a blast furnace 1, the cooling wall 2 is provided with an inner cavity 21, the lower end of the inner cavity 21 of the cooling wall 2 is connected to the output end of a cooling water supply pipe 3, and the upper end of the inner cavity 21 of the cooling wall 2 is connected to the input end of a cooling water return pipe 6. A cleaning water pipeline 7 is connected to the cooling water return pipe 6, and a booster pump 8 and a bypass valve 81 are sequentially connected to the cleaning water pipeline 7 along the flow direction of the cleaning water. A sewage pipe 5 is connected to the cooling water supply pipe 3, and a sewage valve 51 is provided on the sewage pipe 5.

[0025] A flow guiding protrusion 22 is provided on the side wall of the inner cavity 21 of the cooling wall 2, and the flow guiding protrusion 22 is spiral. The connection between the cooling water return pipe 6 and the inner cavity 21 of the cooling wall 2 is a cleaning water output hole 62, and the water outlet direction of the cleaning water output hole 62 is tangent to the outer wall of the inner cavity 21 of the cooling wall 2, and the water outlet of the cleaning water output hole 62 is directed to the side of the flow guiding protrusion 22 that is tilted downward. The water outlet direction of the cleaning water output hole 62 is arranged horizontally.

[0026] The inner wall and the outer wall of the inner cavity 21 of the cooling wall 2 are both provided with flow guiding protrusions 22 , and the flow guiding protrusions 22 on the inner wall and the outer wall of the inner cavity 21 rotate in the same direction.

[0027] The inner cavity 21 of the cooling wall 2 includes an inverted tapered inner cavity 23 located in the middle thereof.

[0028] The cooling water supply pipe 3 is connected to at least two parallel soft water pipes 9, each soft water pipe 9 is connected to a soft water circulation pump 4 and a first valve 41 in sequence along the water flow direction, and a second valve 31 is provided on the cooling water supply pipe 3 between the soft water pipe 9 and the sewage pipe 5.

[0029] A third valve 61 is provided on the cooling water return pipe 6 , and the connection point between the cleaning water pipeline 7 and the cooling water return pipe 6 is located between the third valve 61 and the input end of the cooling water return pipe 6 .

[0030] When the blast furnace 1 needs to be cooled, the bypass valve 81 and the drain valve 51 are kept closed, the first valve 41, the second valve 31 and the third valve 61 are opened, the soft water circulation pump 4 is turned on, and soft water is injected into the inner cavity 21 of the cooling wall 2 through the cooling water supply pipe 3 to cool the blast furnace 1. The soft water flows back to the cooling water circulation system from the cooling water return pipe 6 at the top of the inner cavity 21.

[0031] When it is necessary to clean the inner cavity 21 of the cooling wall 2, close the first valve 41, the second valve 31, the third valve 61 and the soft water circulation pump 4, open the booster pump 8, the bypass valve 81 and the drain valve 51, and allow the cleaning water to be output from the water supply station, enter the inner cavity 21 of the cooling wall 2 through the cleaning water pipeline 7 and the cooling water return pipe 6, and form a vortex in the inner cavity 21. The vortex cleaning water cleans all wall surfaces of the inner cavity 21, cleans welding slag and other debris, and the sewage is discharged from the drain pipe 5.

[0032] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A cleaning device for a blast furnace soft water closed circulation system, comprising a cooling wall (2) arranged on the outer wall of a blast furnace (1), characterized in that: The cooling wall (2) is provided with an inner cavity (21), the lower end of the inner cavity (21) of the cooling wall (2) is connected to the output end of the cooling water supply pipe (3), and the upper end of the inner cavity (21) of the cooling wall (2) is connected to the input end of the cooling water return pipe (6); the cooling water return pipe (6) is connected to a cleaning water pipe (7), and the cleaning water pipe (7) is connected to a booster pump (8) and a bypass valve (81) in sequence along the flow direction of the cleaning water; the cooling water supply pipe (3) is connected to a sewage pipe (5), and the sewage pipe (5) is provided with a sewage valve (51).

2. A cleaning device for a blast furnace soft water closed circulation system according to claim 1, characterized in that: A flow guiding protrusion (22) is provided on the side wall of the inner cavity (21) of the cooling wall (2), and the flow guiding protrusion (22) is spiral-shaped; the connection between the cooling water return pipe (6) and the inner cavity (21) of the cooling wall (2) is a cleaning water output hole (62), and the water outlet direction of the cleaning water output hole (62) is tangent to the outer wall of the inner cavity (21) of the cooling wall (2), and the water outlet of the cleaning water output hole (62) is directed to the side of the flow guiding protrusion (22) that is inclined downward; the water outlet direction of the cleaning water output hole (62) is arranged horizontally.

3. A cleaning device for a blast furnace soft water closed circulation system according to claim 2, characterized in that: The flow-guiding protrusions (22) are provided on both the inner wall and the outer wall of the inner cavity (21) of the cooling wall (2), and the flow-guiding protrusions (22) on the inner wall and the outer wall of the inner cavity (21) rotate in the same direction.

4. A cleaning device for a blast furnace soft water closed circulation system according to claim 2, characterized in that: The inner cavity (21) of the cooling wall (2) comprises an inverted cone-shaped inner cavity (23) located in the middle thereof.

5. The cleaning device for a blast furnace soft water closed circulation system according to claim 1, characterized in that: The cooling water supply pipe (3) is connected to at least two soft water pipes (9) arranged in parallel with each other, each soft water pipe (9) is sequentially connected to a soft water circulation pump (4) and a first valve (41) along the water flow direction, and a second valve (31) is provided on the cooling water supply pipe (3) between the soft water pipe (9) and the sewage pipe (5).

6. A cleaning device for a blast furnace soft water closed circulation system according to claim 1, characterized in that: The cooling water return pipe (6) is provided with a third valve (61), and the connection point between the cleaning water pipeline (7) and the cooling water return pipe (6) is located between the third valve (61) and the input end of the cooling water return pipe (6).

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