Flue gas heat exchange device of submerged arc furnace

Abstract

The utility model discloses a submerged arc furnace smoke heat exchange device which comprises a smoke exhaust pipe, a blocking piece is arranged in a heat exchange pipe in a sliding mode and divides the internal space of the heat exchange pipe into two cavities, the bottom end of the blocking piece is attached to the inner bottom face of the heat exchange pipe, the section of the blocking piece is in a corrugated shape, and the distance between the wave trough of the blocking piece and the inner bottom face of the heat exchange pipe is gradually reduced from bottom to top. The outer arc surface of the circular ring is fixedly connected with a rotating block, the rotating block penetrates through the blocking piece and is rotationally connected with the blocking piece, the wall thickness of the rotating block is equal to the shortest distance between the wave crest of the blocking piece and the inner top surface of the heat exchange pipe, and the blocking piece divides the inner space of the heat exchange pipe into two cavities; and flowing water flows to push the rotating assembly to rotate to drive the blocking piece to make intermittent amplitude movement, so that two cavities in the heat exchange pipe can be alternately blocked, the retention time of the water flow in the cavities is prolonged, and the smoke heat exchange efficiency is improved.

Description

Technical field:

[0001] The utility model relates to the technical field of flue gas heat exchange, in particular to a flue gas heat exchange device for a submerged arc furnace. Background technology:

[0002] During the smelting process of special alloys in the electric arc furnace, a large amount of flue gas containing heat will be generated and discharged from the exhaust pipe. It is necessary to transport water resources through the heat exchange device to recover the heat in the flue gas.

[0003] The existing heat exchange device mainly comprises a heat exchange tube spirally wound on a smoke exhaust pipe, and a baffle is fixedly connected inside the heat exchange tube. The baffle fixed inside the heat exchange tube cannot change the flow state of the water flow, and the water flow stays in the heat exchange tube for a short time, resulting in an unobvious heat exchange effect. Utility model content:

[0004] To this end, the purpose of the utility model is to provide a mineral arc furnace flue gas heat exchange device to overcome the existing technology because the existing heat exchange device is mainly a heat exchange tube spirally wound on the exhaust pipe, and a baffle is fixedly connected inside the heat exchange tube. The baffle fixed in the heat exchange tube cannot change the flow state of the water flow, and the water flow stays in the heat exchange tube for a short time, resulting in an unclear heat exchange effect.

[0005] The utility model is implemented by the following technical solutions:

[0006] A smoke heat exchange device for an ore-fired furnace comprises a smoke exhaust pipe, the outer wall of which is spirally fixed with a heat exchange pipe, a baffle is slidably provided inside the heat exchange pipe, the baffle divides the internal space of the heat exchange pipe into two cavities, a guide component is fixedly connected inside the baffle, the guide component is fixedly connected to the inner wall of the heat exchange pipe, the bottom end of the baffle is in contact with the inner bottom surface of the heat exchange pipe, a rotating component is rotatably connected inside the baffle, and water flowing in the heat exchange pipe can push the rotating component to drive the baffle to alternately block the two cavities.

[0007] Preferably, the cross-sectional shape of the baffle is corrugated.

[0008] Preferably, the distance between the baffle trough and the inner bottom surface of the heat exchange tube gradually decreases from bottom to top.

[0009] Preferably, the guide assembly comprises a plurality of sealing rings fixedly disposed through the baffle, a guide rod is slidably disposed inside the sealing ring, and both ends of the guide rod pass through the sealing ring and are fixedly connected to the inner wall of the heat exchange tube.

[0010] Preferably, the rotating assembly comprises a circular ring hinged in the baffle through a pin, a rotating block is fixedly connected to the outer arc surface of the circular ring, and the rotating block passes through the baffle and is rotationally connected thereto.

[0011] Preferably, the wall thickness of the rotating block is equal to the shortest distance between the wave crest of the baffle and the inner top surface of the heat exchange tube.

[0012] The advantages of the utility model are as follows: a baffle is slidably connected to the inside of the heat exchange tube through a guide assembly, and the baffle divides the internal space of the heat exchange tube into two cavities. The flow of water drives the rotating assembly to rotate, driving the baffle to move intermittently with an amplitude, so as to alternately block the two cavities in the heat exchange tube, thereby extending the residence time of the water flow in the cavity and improving the flue gas heat exchange efficiency. Description of the drawings:

[0013] 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.

[0014] Figure 1 This is the structural diagram of the utility model;

[0015] Figure 2 It is a schematic structural diagram of an embodiment of the guide assembly of the utility model.

[0016] In the figure: smoke exhaust pipe 1, heat exchange tube 2, baffle 3, guide rod 4, sealing ring 5, circular ring 6, rotating block 7. Specific implementation method:

[0017] In order to make the purpose and advantages of the utility model more clearly understood, the utility model is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0018] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0019] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0020] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0021] like Figure 1-Figure 2 As shown, the utility model provides the following technical solutions: a smoke heat exchange device for a mineral arc furnace, including a smoke exhaust pipe 1, a heat exchange tube 2 is spirally fixedly sleeved on the outer wall of the smoke exhaust pipe 1, a baffle 3 is slidably provided inside the heat exchange tube 2, the baffle 3 divides the internal space of the heat exchange tube 2 into two cavities, a guide component is fixedly connected inside the baffle 3, the guide component is fixedly connected to the inner wall of the heat exchange tube 2, the bottom end of the baffle 3 is in contact with the inner bottom surface of the heat exchange tube 2, a rotating component is rotatably connected inside the baffle 3, and water flowing in the heat exchange tube 2 can push the rotating component to drive the baffle 3 to alternately block the two cavities.

[0022] The cross-sectional shape of the baffle 3 is corrugated, which prolongs the flow path of the water flow, thereby prolonging the residence time of the water flow in the heat exchange tube 2.

[0023] The distance between the wave trough of the baffle 3 and the inner bottom surface of the heat exchange tube 2 gradually decreases from bottom to top, thereby reducing the flow rate of water per unit time in the cavity at the bottom end of the baffle 3.

[0024] Please combine Figure 1 When the water flow at the bottom of the baffle 3 drives the rotating assembly to rotate, the rotating assembly drives the baffle 3 to slide on the guide assembly. When the wave crest of the baffle 3 fits the inner top surface of the heat exchange tube 2, it stops moving. The bottom end of the baffle 3 moves and separates from the inner bottom surface of the heat exchange tube 2. At this time, the water flows along the cavity at the bottom end of the baffle 3. Since the distance between the trough of the 3 and the inner bottom surface of the heat exchange tube 2 gradually decreases from bottom to top, the unit time flow rate of the water flow in the cavity at the bottom end of the baffle 3 is reduced to ensure that the water flow fills the troughs. When the water flow at the bottom end of the baffle 3 drives the rotating assembly to rotate, the rotation of the rotating assembly drives the baffle 3 to slide, thereby realizing that the baffle 3 alternately blocks the two cavities in the heat exchange tube 2, prolongs the top flow time of the water flow in the heat exchange tube 2, and improves the heat exchange efficiency.

[0025] Please combine Figure 1 , Figure 2As shown, an embodiment of the guide assembly includes a plurality of sealing rings 5 ​​fixedly penetrating the baffle 3, a guide rod 4 slidingly arranged inside the sealing ring 5, both ends of the guide rod 4 passing through the sealing ring 5 and fixedly connected to the inner wall of the heat exchange tube 2.

[0026] Please combine Figure 1 As shown, during use, when the baffle 3 slides, the baffle 3 drives the sealing ring 5 to slide on the guide rod 4. The setting of the guide rod 4 provides a guiding effect for the sliding of the baffle 3, and the sealing ring 5 ensures the sealing of the connection between the baffle 3 and the guide rod 4.

[0027] Please combine Figure 1 As shown, an embodiment of a rotating assembly includes a ring 6 hinged in the baffle 3 through a pin shaft, and a rotating block 7 is fixedly connected to the outer arc surface of the ring 6. The rotating block 7 passes through the baffle 3 and is rotatably connected thereto.

[0028] The wall thickness of the rotating block 7 is equal to the shortest distance between the wave crest of the baffle 3 and the inner top surface of the heat exchange tube 2 .

[0029] Please combine Figure 1 As shown, during use, the flow of water drives the rotating block 7 to rotate, the rotating block 7 drives the ring 6 to rotate, the rotating block 7 drives the ring 6 to move, and the ring 6 drives the baffle 3 to move, thereby achieving the sliding of the baffle 3 to alternately block the two cavities in the heat exchange tube 2.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A submerged arc furnace flue gas heat exchange device, comprising a smoke exhaust pipe, wherein the outer wall of the smoke exhaust pipe is spirally fixed with a heat exchange pipe, characterized in that: A baffle is slidably provided inside the heat exchange tube, and the baffle divides the internal space of the heat exchange tube into two cavities. A guide component is fixedly connected inside the baffle, and the guide component is fixedly connected to the inner wall of the heat exchange tube. The bottom end of the baffle is in contact with the bottom surface of the heat exchange tube. A rotating component is rotatably connected inside the baffle, and water flowing in the heat exchange tube can push the rotating component to drive the baffle to alternately block the two cavities.

2. The submerged arc furnace flue gas heat exchange device according to claim 1, characterized in that: The cross-section of the baffle is corrugated.

3. The submerged arc furnace flue gas heat exchange device according to claim 2, characterized in that: The distance between the baffle wave trough and the inner bottom surface of the heat exchange tube gradually decreases from bottom to top.

4. A submerged arc furnace flue gas heat exchange device according to any one of claims 1 to 3, characterized in that: The guide assembly comprises a plurality of fixed sealing rings penetrating the baffle, a guide rod is slidably arranged in the sealing ring, and both ends of the guide rod pass through the sealing ring and are fixedly connected to the inner wall of the heat exchange tube.

5. A submerged arc furnace flue gas heat exchange device according to claim 2 or 3, characterized in that: The rotating assembly comprises a circular ring hinged in the baffle through a pin shaft, a rotating block is fixedly connected to the outer arc surface of the circular ring, and the rotating block penetrates the baffle and is rotatably connected thereto.

6. The submerged arc furnace flue gas heat exchange device according to claim 5, characterized in that: The wall thickness of the rotating block is equal to the shortest distance between the wave crest of the baffle and the inner top surface of the heat exchange tube.

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