Energy-saving white-eliminating device for blast furnace water-washed slag

Abstract

The utility model discloses a blast furnace water flushing slag energy-saving white elimination device, and relates to the technical field of metallurgical ironmaking slag environment-friendly treatment devices, the blast furnace water flushing slag energy-saving white elimination device comprises a smoke exhaust pipe and a central cylinder arranged in the smoke exhaust pipe, a plurality of small holes are formed in the outer wall of the smoke exhaust pipe and the outer wall of the central cylinder, and a condensation cavity is formed between the smoke exhaust pipe and the central cylinder; a plurality of condensation pipes are arranged in the condensation cavity, and the condensation pipes communicate the atmosphere with the interior of the central cylinder through the small holes; a dehydrator is arranged at the upper part of the condensation cavity, a gas mixing chamber communicated with the condensation cavity and the interior of the central cylinder is arranged at the upper part of the dehydrator, and an exhaust port is formed in the gas mixing chamber; vent holes are formed in the upper part of the central cylinder; a drain pipe is connected to the lower part of the central cylinder; the utility model has the characteristics of low cost and unpowered operation, and meets the requirements of energy conservation and environmental protection.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmentally friendly treatment devices for metallurgical ironmaking slag, and particularly relates to an energy-saving and whitening device for blast furnace water-flushing slag. Background Art

[0002] During the smelting process in a blast furnace, high-temperature slag is produced as a byproduct while producing molten iron. Currently, most domestic steel companies use a sedimentation slag process, in which blast furnace slag is flushed into slag through a granulator and then flows along a slag flushing ditch into a sedimentation tank. This process produces a large amount of high-temperature, high-humidity corrosive steam. When this corrosive steam is discharged into the atmosphere, it encounters cold air and is rapidly cooled, causing a large number of tiny water droplets to form in the steam, resulting in a white smoke plume. This not only affects the environmental perception but also poses a certain corrosive hazard to the surrounding environment.

[0003] To this end, Chinese utility model patent CN218249441U discloses an energy-saving blast furnace slag steam treatment device. This device features an outer cylinder outside a central cylinder, with multiple layers of low-temperature heat pipes arranged circumferentially within the central cylinder. Each layer of low-temperature heat pipes consists of multiple heat pipes, and the heat pipes of two adjacent layers of low-temperature heat pipes are arranged in a staggered pattern. The heat-absorbing ends of the low-temperature heat pipes are located within the central cylinder, while the heat-releasing ends of the low-temperature heat pipes extend beyond the central cylinder and are located within the outer cylinders. A granulation tower or slag ditch is connected to the bottom of the central cylinder, and the tops of both the central and outer cylinders are connected to the bottom of a mixing chamber. A guide plate is installed within the mixing chamber, and the top of the mixing chamber is connected to a chimney. This solution uses heat pipes for heat exchange, which is relatively costly.

[0004] In view of this, it is necessary to improve the existing blast furnace slag steam treatment device to reduce costs and achieve unpowered operation of blast furnace water slag steam treatment. Utility Model Content

[0005] The purpose of this utility model is to provide a blast furnace water slag flushing energy-saving whitening device to solve the above-mentioned problems existing in the prior art.

[0006] In order to achieve the above purpose, this utility adopts the following technical solutions:

[0007] A blast furnace water slag flushing energy-saving and whitening device comprises a smoke exhaust pipe and a central cylinder arranged in the smoke exhaust pipe, a plurality of small holes are provided on the outer walls of the smoke exhaust pipe and the central cylinder, a condensation chamber is provided between the smoke exhaust pipe and the central cylinder, a plurality of condensation pipes are provided in the condensation chamber, the two ends of the condensation pipes are respectively connected with the small holes of the smoke exhaust pipe and the small holes of the central cylinder to connect the atmosphere with the interior of the central cylinder; a dehydrator is provided on the upper part of the condensation chamber, a gas mixing chamber connected with the condensation chamber and the interior of the central cylinder is provided on the upper part of the dehydrator, and an exhaust port is provided on the gas mixing chamber; an air vent is provided on the upper part of the central cylinder, and a drain pipe is connected to the lower part of the central cylinder.

[0008] The utility model discloses an energy-saving and whitening device for blast furnace water slag flushing, through the arrangement of a smoke exhaust pipe, a central cylinder and a condenser. When the water slag vapor goes up along the condensing chamber, under the action of the chimney effect, the external low-temperature air will be sucked into the central cylinder through the condenser, and the water slag vapor in the condensing chamber is condensed. The heat of the water slag vapor is transferred to the external air through the condenser, and the external air temperature rises to form hot air. The water slag vapor condenses into wet steam, and the wet steam rises and passes through the dehydrator to remove water. The water flows down along the inner wall and enters the slag ditch for recovery. The dehydrated steam continues to rise to the gas mixing chamber and mixes with the hot air flowing out of the central cylinder to form slightly saturated air discharge, thereby achieving the purpose of whitening and environmental protection. The device draws in external low-temperature air through the chimney effect to achieve condensation and whitening, reduces costs, and realizes the unpowered operation of blast furnace water slag flushing steam treatment.

[0009] Optionally, a conical guide plate is provided above the central cylinder, the conical guide plate is located in the gas mixing chamber, the vent is located on the conical guide plate, and the gas mixing chamber is connected to the interior of the central cylinder through the vent.

[0010] The setting of the conical guide plate facilitates the discharge of hot air in the central cylinder.

[0011] Optionally, an inverted cone-shaped guide body cooperating with the vent hole is provided inside the conical guide plate.

[0012] The inverted cone-shaped guide body is set to guide the hot air in the central cylinder to be discharged from the vent hole.

[0013] Optionally, an inverted cone-shaped guide plate is provided at the lower portion of the central cylinder, and the lower end of the inverted cone-shaped guide plate is connected to the drain pipe.

[0014] The setting of the drain pipe makes it easy to discharge the condensed water in the central cylinder.

[0015] Optionally, a steam distributor is provided below the condensation chamber.

[0016] Optionally, the steam distributor adopts a mesh plate structure.

[0017] The steam distributor is set up to make the rising slag steam evenly distributed in the condensation chamber.

[0018] Optionally, the end of the condenser pipe connected to the smoke exhaust pipe is lower than the end of the condenser pipe connected to the inside of the central cylinder.

[0019] By arranging the end of the condenser connected to the atmosphere to be lower than the end of the condenser connected to the interior of the central cylinder, external air can be more easily sucked into the interior of the central cylinder.

[0020] Optionally, the condensing tubes are arranged in layers along the circumference of the central cylinder.

[0021] The layered arrangement allows for more complete contact between the steam and the condenser.

[0022] Optionally, a smoke hood is provided below the smoke exhaust pipe.

[0023] Beneficial effect: The energy-saving and whitening device for blast furnace water slag flushing of the present invention is provided with a smoke exhaust pipe, a central cylinder and a condenser. When the water slag vapor goes up along the condensation chamber, under the action of the chimney effect, the external low-temperature air will be sucked into the central cylinder through the condenser to condense the water slag vapor in the condensation chamber, and the heat of the water slag vapor is transferred to the external air through the condenser. The temperature of the external air rises to form hot air, and the water slag vapor condenses into wet steam. The wet steam rises and passes through the dehydrator to remove water. The water flows down along the inner wall and enters the slag ditch for recovery. The dehydrated steam continues to rise to the gas mixing chamber and mixes with the hot air flowing out of the central cylinder to form unsaturated air discharge, thereby achieving the purpose of whitening and environmental protection. The device draws in external low-temperature air through the chimney effect to achieve condensation and whitening, reduces costs, and realizes the unpowered operation of blast furnace water slag flushing steam treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the overall structure of the blast furnace water slag flushing energy-saving whitening device in the embodiment;

[0025] Figure 2 This is a usage status diagram of the blast furnace water slag flushing energy-saving and whitening device in the embodiment.

[0026] In the figure: 1. Smoke exhaust pipe; 2. Central cylinder; 3. Condensation chamber; 4. Condensation pipe; 5. Dehydrator; 6. Gas mixing chamber; 7. Vent; 8. Drain pipe; 9. Cone-shaped guide plate; 10. Inverted cone-shaped guide body; 11. Inverted cone-shaped guide plate; 12. Steam distributor; 13. Exhaust port; 14. Smoke hood. DETAILED DESCRIPTION

[0027] Example

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in conjunction with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0029] In the description of this utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this utility model; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0030] In the description of this utility model, it should be understood that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0031] like Figure 1-Figure 2 As shown, this embodiment provides a blast furnace water slag flushing energy-saving and whitening device, including a smoke exhaust pipe 1 and a central cylinder 2 arranged in the smoke exhaust pipe 1, a plurality of small holes are provided on the outer walls of the smoke exhaust pipe 1 and the central cylinder 2, a condensation chamber 3 is provided between the smoke exhaust pipe 1 and the central cylinder 2, a plurality of condensation pipes 4 are provided in the condensation chamber 3, and the two ends of the condensation pipes 4 are respectively connected with the small holes of the smoke exhaust pipe 1 and the small holes of the central cylinder 2 to connect the atmosphere with the interior of the central cylinder 2. In this embodiment, the condensation pipes 4 are made of ordinary steel pipes to save costs; a dehydrator 5 is provided on the upper part of the condensation chamber 3, and a gas mixing chamber 6 connected with the condensation chamber 3 and the interior of the central cylinder 2 is provided on the upper part of the dehydrator 5, and an exhaust port 13 is provided on the gas mixing chamber 6; an air vent 7 is provided on the upper part of the central cylinder 2, and a drain pipe 8 is connected to the lower part of the central cylinder 2.

[0032] Through the arrangement of the smoke exhaust pipe 1, the central cylinder 2 and the condensing pipe 4, when the slag vapor goes up along the condensing chamber 3, under the action of the chimney effect, the external low-temperature air will be sucked into the central cylinder 2 through the condensing pipe 4, and the slag vapor in the condensing chamber 3 will be condensed. The heat of the slag vapor is transferred to the external air through the condensing pipe 4, and the external air temperature rises to form hot air. The slag vapor condenses into wet steam, and the wet steam rises and passes through the dehydrator 5 to remove water. The water flows down along the inner wall and enters the slag ditch for recovery. The dehydrated steam continues to rise to the gas mixing chamber 6 and mixes with the hot air flowing out of the central cylinder 2 to form unsaturated air discharge, thereby achieving the purpose of de-whitening and environmental protection. The device draws in external low-temperature air through the chimney effect to achieve condensation and de-whitening, reduces costs, and realizes the unpowered operation of blast furnace water-flushing slag steam treatment.

[0033] In an optional embodiment, a conical guide plate 9 is provided above the central cylinder 2, the conical guide plate 9 is located in the gas mixing chamber 6, the vent 7 is located on the conical guide plate 9, and the gas mixing chamber 6 is connected to the interior of the central cylinder 2 through the vent 7; the setting of the conical guide plate 9 facilitates the discharge of hot air in the central cylinder 2.

[0034] In an optional embodiment, an inverted cone-shaped guide body 10 cooperating with the vent hole 7 is provided inside the conical guide plate 9; the hot air in the central cylinder 2 is guided to be discharged from the vent hole 7 through the inverted cone-shaped guide body 10.

[0035] In an optional embodiment, an inverted cone-shaped guide plate 11 is provided at the lower portion of the central cylinder 2, and a drain pipe 8 is connected to the lower end of the inverted cone-shaped guide plate 11; the provision of the drain pipe 8 facilitates the discharge of condensed water.

[0036] In an optional embodiment, a steam distributor 12 is provided below the condensation chamber 3 , and the steam distributor 12 adopts a mesh plate structure; through the provision of the steam distributor 12 , the rising water slag vapor can be evenly distributed in the condensation chamber 3 .

[0037] In an optional embodiment, the end of the condenser 4 connected to the smoke exhaust pipe 1 is lower than the end of the condenser 4 connected to the interior of the central cylinder 2; by setting the end of the condenser 4 connected to the smoke exhaust pipe 1 lower than the end of the condenser 4 connected to the interior of the central cylinder 2, external air is more easily sucked into the interior of the central cylinder 2.

[0038] In an optional embodiment, the condenser tubes 4 are arranged in layers along the circumference of the central cylinder 2; the layered arrangement allows for more complete contact between the steam and the condenser tubes 4.

[0039] In an optional embodiment, a smoke hood 14 is provided below the smoke exhaust pipe 1 .

[0040] Working principle: During the production process, a large amount of slag vapor will be formed in the water-flushing slag ditch after the blast furnace slag is granulated by high-pressure water. The slag vapor enters the condensation chamber 3 and flows upward. A multi-layer condenser tube 4 is provided in the condensation chamber 3, and the condenser tube 4 connects the atmosphere with the interior of the central cylinder 2; under the action of suction, the external low-temperature air is sucked into the interior of the central cylinder 2 through the condenser tube 4. When passing through the condenser tube 4, it exchanges heat with the upward slag vapor. The temperature of the external low-temperature air rises to form hot air, enters the interior of the central cylinder 2 and is discharged into the gas mixing chamber 6 through the air vent 7. The slag vapor condenses to form wet steam, and the moisture is removed by the dehydrator 5. The water flows down along the inner wall and enters the slag ditch for recovery. The dehydrated steam continues to rise to the gas mixing chamber 6 and mixes with the hot air flowing out of the central cylinder 2 to form slightly saturated air discharge, thereby achieving the purpose of de-whitening and environmental protection; the device draws in external low-temperature air through the chimney effect to achieve condensation de-whitening, reduce costs, and realize the unpowered operation of blast furnace water-flushing slag steam treatment.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A blast furnace water slag flushing energy-saving whitening device, comprising a smoke exhaust pipe (1) and a central cylinder (2) arranged in the smoke exhaust pipe (1), characterized in that: A plurality of small holes are provided on the outer walls of the smoke exhaust pipe (1) and the central cylinder (2); a condensation chamber (3) is provided between the smoke exhaust pipe (1) and the central cylinder (2); a plurality of condensation pipes (4) are provided in the condensation chamber (3); the two ends of the condensation pipes (4) are respectively connected to the small holes of the smoke exhaust pipe (1) and the small holes of the central cylinder (2) so that the atmosphere is connected to the interior of the central cylinder (2); a dehydrator (5) is provided on the upper part of the condensation chamber (3); a gas mixing chamber (6) connected to the condensation chamber (3) and the interior of the central cylinder (2) is provided on the upper part of the dehydrator (5); an exhaust port (13) is provided on the gas mixing chamber (6); a vent hole (7) is provided on the upper part of the central cylinder (2); and a drain pipe (8) is connected to the lower part of the central cylinder (2).

2. The blast furnace water slag flushing energy-saving and whitening device according to claim 1 is characterized in that: A conical guide plate (9) is provided above the central cylinder (2), the conical guide plate (9) is located in the gas mixing chamber (6), the vent hole (7) is located on the conical guide plate (9), and the gas mixing chamber (6) is communicated with the interior of the central cylinder (2) through the vent hole (7).

3. The blast furnace water slag flushing energy-saving and whitening device according to claim 2 is characterized in that: An inverted cone-shaped guide body (10) that matches the vent hole (7) is provided inside the cone-shaped guide plate (9).

4. The blast furnace water slag flushing energy-saving and whitening device according to claim 1 is characterized in that: An inverted cone-shaped guide plate (11) is provided at the lower portion of the central cylinder (2), and the lower end of the inverted cone-shaped guide plate (11) is connected to the drain pipe (8).

5. The blast furnace water slag flushing energy-saving and whitening device according to claim 1 is characterized in that: A steam distributor (12) is provided below the condensation chamber (3).

6. The blast furnace water slag flushing energy-saving and whitening device according to claim 5 is characterized in that: The steam distributor (12) adopts a mesh plate structure.

7. The blast furnace water slag flushing energy-saving and whitening device according to claim 1 is characterized in that: The end of the condenser pipe (4) connected to the smoke exhaust pipe (1) is lower than the end of the condenser pipe (4) connected to the inside of the central cylinder (2).

8. The blast furnace water slag flushing energy-saving and whitening device according to claim 1 is characterized in that: The condensing tubes (4) are arranged in layers along the circumference of the central cylinder (2).

9. The blast furnace water slag flushing energy-saving and whitening device according to claim 1 is characterized in that: A smoke hood (14) is provided below the smoke exhaust pipe (1).

Images