Smoke recycling structure of hot blast stove

Abstract

The utility model discloses a hot-blast stove flue gas recycling structure in the technical field of hot-blast stove flue gas recycling, which comprises a bottom plate, a stove body mounted on the bottom plate, a heat exchange box mounted on the stove body, a heat collecting pipe arranged in the heat exchange box, one end of the heat collecting pipe communicated with the stove body, and a rotating column rotatably connected to the heat exchange box. A first winding shaft is installed on the rotating column, a first pull rope is wound on the first winding shaft and movably connected into the heat collecting pipe, a driving mechanism is installed on the heat exchange box, a second winding shaft is rotationally connected to the heat exchange box, a second pull rope and an air pipe are wound on the second winding shaft, and a torsional spring is arranged on one side of the second winding shaft. A cleaning mechanism is arranged among the second pull rope, the first pull rope and the air pipe, the cleaning mechanism is movably connected into the containing box and movably connected into the heat collecting pipe, and a negative pressure machine is installed at one end of the air pipe, so that the heat collecting pipe can be effectively cleaned, and the heat exchange efficiency of the heat collecting pipe is prevented from being reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hot blast stove fume recycling, in particular to a hot blast stove fume recycling structure. Background Art

[0002] In the process of fine desulfurization of blast furnace gas after TRT of blast furnace gas, it is necessary to heat and increase the temperature of blast furnace gas from 60°C to 90°C. The general conventional practice is to use a steam heater to heat the gas. Since steam is a higher-grade heat source, the cost of use is high. The flue gas temperature from the blast furnace hot blast grate to the chimney is 150°C ~ 190°C, and this part of the flue gas waste heat is not utilized. In the process of fine desulfurization of blast furnace gas, the blast furnace gas needs to be heated from 60°C to 90°C. The use of other heat sources has high operating costs and serious waste of resources. Therefore, a technical solution is disclosed in Patent No.: CN202122963503.7, but this technical solution still has some problems when used. When recycling the flue gas, this technical solution uses a heat collecting tube to circulate the flue gas. The heat is collected by the heat collector, and then the heat in the flue gas is absorbed and circulated by heat exchange. This operation can absorb and circulate the flue gas, but the general collector tube structure is closed, and the flue gas will contain a large amount of smoke and unburned substances in the process of circulation. When such substances enter the collector tube, dust will accumulate on the inner wall of the collector tube. If it is not cleaned in time, it will affect the heat exchange efficiency of the collector tube, thereby reducing the efficiency of the equipment when the flue gas is recycled. Utility Model Content

[0003] The utility model aims to provide a hot blast stove fume recycling structure to solve the problem inconvenient equipment cleaning during recycling, which leads to reduced utilization rate, as mentioned in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A hot blast furnace flue gas recycling structure comprises a base plate, a furnace body is installed on the base plate, a heat exchange box is installed on the furnace body, a heat collecting tube is arranged in the heat exchange box, one end of the heat collecting tube is connected with the furnace body, a rotating column is rotatably connected to the heat exchange box, a first winding shaft is installed on the rotating column, a first pull rope is wound around the first winding shaft, the first pull rope is movably connected in the heat collecting tube, a driving mechanism is installed on the heat exchange box, a second winding shaft is rotatably connected to the heat exchange box, a second pull rope and an air pipe are wound around the second winding shaft, a torsion spring is provided on one side of the second winding shaft, a cleaning mechanism is provided among the second pull rope, the first pull rope and the air pipe, the cleaning mechanism is movably connected in a placement box, the cleaning mechanism is movably connected in the heat collecting tube, and a negative pressure machine is installed at one end of the air pipe.

[0006] Preferably, the driving mechanism includes a full gear, a driving motor and a half gear, the full gear is installed on the first winding shaft, the driving motor is installed on the heat exchange box, the half gear is installed on the output end of the driving motor, and the half gear and the full gear are meshingly connected.

[0007] Preferably, the first pull rope and the second pull rope are made of steel wire, a high temperature resistant layer is provided on the outer side of the air pipe, a placement box is installed on the heat collecting tube, and the second pull rope and the air pipe are movably connected in the placement box.

[0008] Preferably, the cleaning mechanism includes a sphere, a cleaning brush and air holes, the sphere is fixedly connected between the first pull rope and the second pull rope, the air pipe is connected to the sphere through-holes, the sphere is provided with a plurality of air holes, and the sphere is provided with a plurality of spherical beads.

[0009] Preferably, a track wheel is provided at the air outlet of the heat collecting tube, and the first pull rope is slidably connected in the track wheel.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model has a cleaning mechanism located in the placement box, and the first pull rope is located in the heat collecting tube, and the second pull rope and the air pipe are in a reeled state, thereby effectively avoiding the equipment from affecting the heat exchange efficiency of the heat collecting tube when it is working. When the heat collecting tube completes the heat exchange, the smoke is discharged from the upper side of the heat collecting tube. After the heat collecting tube has been used for a period of time, a large amount of dust will accumulate on the inner wall of the heat collecting tube. At this time, the driving motor is controlled to work. When the driving motor is working, the half gear on the driving motor controls the full gear to rotate. When the full gear rotates, the first reel reels the first pull rope, and at the same time, the first pull rope pulls the ball to move in the heat collecting tube. At this time, the second reel is in an unreeled state, and the torsion spring is compressed. In the process of the sphere moving in the heat collecting tube, the cleaning brush on the sphere can effectively clean the inner wall of the heat collecting tube. At the same time, the negative pressure generated by the negative pressure machine can be used to suck the cleaned dust out of the air holes and discharge it to the outside of the equipment, thereby completing the cleaning of the cleaning mechanism to avoid the accumulation of dust on the inner wall of the heat collecting tube, thereby affecting its heat exchange efficiency. At the same time, it can prevent the heat collecting tube structure from being in a sealed state, resulting in the inability to clean it quickly by humans. When the half gear and the full gear are disengaged, the torsion spring reverses. At this time, the second winding shaft is in a winding state and the first winding shaft is in an unwinding state. This can be repeated to clean the heat collecting tube for the second time, thereby ensuring the cleaning efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are 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 creative work.

[0013] Figure 1 This is a schematic diagram of the structure of the utility model from the front side perspective;

[0014] Figure 2 This is a schematic diagram of the structure of the utility model from a rear side perspective;

[0015] Figure 3 It is a schematic diagram of the internal structure of the utility model from a partial upper side perspective.

[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0017] 1. Bottom plate; 2. Furnace body; 3. Heat exchange box; 4. Collecting tube; 5. Rotating column; 6. First reel; 7. First pull rope; 8. Driving mechanism; 9. Full gear; 10. Driving motor; 11. Half gear; 12. Second reel; 13. Second pull rope; 14. Air pipe; 15. Torsion spring; 16. Placement box; 17. Cleaning mechanism; 18. Sphere; 19. Cleaning brush; 20. Air hole; 21. Track wheel; 22. Negative pressure machine. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-Figure 3 , the utility model provides a technical solution:

[0020] A hot blast furnace flue gas recycling structure comprises a base plate 1, a furnace body 2 is installed on the base plate 1, a heat exchange box 3 is installed on the furnace body 2, a heat collecting tube 4 is arranged in the heat exchange box 3, one end of the heat collecting tube 4 is connected with the furnace body 2, a rotating column 5 is rotatably connected to the heat exchange box 3, a first winding shaft 6 is installed on the rotating column 5, a first pull rope 7 is wound around the first winding shaft 6, the first pull rope 7 is movably connected in the heat collecting tube 4, a driving mechanism 8 is installed on the heat exchange box 3, a second winding shaft 12 is rotatably connected to the heat exchange box 3, a second pull rope 13 and an air pipe 14 are wound around the second winding shaft 12, a torsion spring 15 is arranged on one side of the second winding shaft 12, a cleaning mechanism 17 is arranged between the second pull rope 13, the first pull rope 7 and the air pipe 14, the cleaning mechanism 17 is movably connected in a placement box 16, the cleaning mechanism 17 is movably connected in the heat collecting tube 4, and a negative pressure machine 22 is arranged at one end of the air pipe 14.

[0021] Among them, the driving mechanism 8 includes a full gear 9, a driving motor 10 and a half gear 11. The full gear 9 is installed on the first winding shaft 6, the driving motor 10 is installed on the heat exchange box 3, and the half gear 11 is installed on the output end of the driving motor 10. The half gear 11 and the full gear 9 are meshed and connected; it is convenient to control the winding of the first winding shaft 6 and the unwinding of the second winding shaft 12 at the same time, so that it forms a situation of one winding and one pulling, thereby cleaning the inside of the heat collecting tube 4.

[0022] Among them, the first pull rope 7 and the second pull rope 13 are made of steel wire, a high-temperature resistant layer is provided on the outside of the air pipe 14, a placement box 16 is installed on the heat collecting tube 4, and the second pull rope 13 and the air pipe 14 are movably connected in the placement box 16; when the equipment is not working, the cleaning mechanism 17 can be put into the placement box 16 to avoid it affecting the heat conduction of the flue gas.

[0023] Among them, the cleaning mechanism 17 includes a sphere 18, a cleaning brush 19 and an air hole 20. The sphere 18 is fixedly connected between the first pull rope 7 and the second pull rope 13. The air pipe 14 is connected to the sphere 18. A plurality of air holes 20 are opened on the sphere 18, and a plurality of spherical beads are provided on the sphere 18; it is convenient to clean the inner wall of the heat collecting tube 4, and it is also convenient to adsorb the cleaned dust.

[0024] Among them, a track wheel 21 is provided at the air outlet of the heat collecting tube 4, and the first pull rope 7 is slidably connected in the track wheel 21; it is convenient to control the movement of the first pull rope 7 and prevent the first pull rope 7 from causing friction damage to the heat collecting tube 4.

[0025] Working principle:

[0026] During operation, the furnace body 2 is controlled to work. At this time, the flue gas generated by the furnace body 2 enters the heat collecting tube 4 from the bottom of the heat collecting tube 4. At this time, the cleaning mechanism 17 is located in the placement box 16, and the first pull rope 7 is located in the heat collecting tube 4. The second pull rope 13 and the air pipe 14 are in a reeled state, thereby effectively avoiding the equipment from affecting the heat exchange efficiency of the heat collecting tube 4 during operation. When the heat collecting tube 4 completes the heat exchange, the flue gas is discharged from the upper side of the heat collecting tube 4. After the heat collecting tube 4 has been used for a period of time, a large amount of dust will accumulate on the inner wall of the heat collecting tube 4. At this time, the drive motor 10 is controlled to work. When the drive motor 10 is working, the half gear 11 on the drive motor 10 controls the full gear 9 to rotate. When the full gear 9 rotates, the first reel 6 reels the first pull rope 7. At the same time, the first pull rope 7 pulls the ball 18 to move in the heat collecting tube 4. At this time, The second winding shaft 12 is in an unwinding state, and the torsion spring 15 is compressed. During the movement of the sphere 18 in the heat collecting tube 4, the cleaning brush 19 on the sphere 18 can effectively clean the inner wall of the heat collecting tube 4. At the same time, the negative pressure generated by the negative pressure machine 22 is cooperated to suck the cleaned dust out of the air hole 20 and discharge it to the outside of the equipment, thereby completing the cleaning of the cleaning mechanism 17 to avoid the accumulation of dust on the inner wall of the heat collecting tube 4, thereby affecting its heat exchange efficiency. At the same time, it avoids the heat collecting tube 4 structure being in a sealed state, which makes it impossible to clean it quickly manually. When the half gear 11 and the full gear 9 are disengaged, the torsion spring 15 reverses. At this time, the second winding shaft 12 is in a winding state, and the first winding shaft 6 is in an unwinding state. This is repeated to clean the heat collecting tube 4 for the second time, thereby ensuring the cleaning efficiency of the equipment.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hot blast stove flue gas recycling structure, comprising a bottom plate (1), characterized in that: A furnace body (2) is mounted on the bottom plate (1), a heat exchange box (3) is mounted on the furnace body (2), a heat collecting tube (4) is arranged inside the heat exchange box (3), one end of the heat collecting tube (4) is connected to the furnace body (2), a rotating column (5) is rotatably connected to the heat exchange box (3), a first winding shaft (6) is mounted on the rotating column (5), a first pull rope (7) is wound around the first winding shaft (6), the first pull rope (7) is movably connected to the heat collecting tube (4), a driving mechanism (8) is mounted on the heat exchange box (3), and the A second winding shaft (12) is rotatably connected to the heat exchange box (3), a second pull rope (13) and an air pipe (14) are wound around the second winding shaft (12), a torsion spring (15) is provided on one side of the second winding shaft (12), a cleaning mechanism (17) is provided between the second pull rope (13), the first pull rope (7) and the air pipe (14), the cleaning mechanism (17) is movably connected in a placement box (16), the cleaning mechanism (17) is movably connected in a heat collecting tube (4), and a negative pressure machine (22) is installed at one end of the air pipe (14).

2. A hot blast stove flue gas recycling structure according to claim 1, characterized in that: The driving mechanism (8) comprises a full gear (9), a driving motor (10) and a half gear (11); the full gear (9) is mounted on the first winding shaft (6); the driving motor (10) is mounted on the heat exchange box (3); the half gear (11) is mounted on the output end of the driving motor (10); the half gear (11) and the full gear (9) are meshingly connected.

3. A hot blast stove flue gas recycling structure according to claim 1, characterized in that: The first pull rope (7) and the second pull rope (13) are made of steel wire, a high temperature resistant layer is provided on the outside of the air pipe (14), a placement box (16) is installed on the heat collecting tube (4), and the second pull rope (13) and the air pipe (14) are movably connected in the placement box (16).

4. A hot blast stove flue gas recycling structure according to claim 1, characterized in that: The cleaning mechanism (17) comprises a sphere (18), a cleaning brush (19) and air holes (20); the sphere (18) is fixedly connected between the first pull rope (7) and the second pull rope (13); the air pipe (14) is connected to the sphere (18); a plurality of air holes (20) are provided on the sphere (18); and a plurality of spherical beads are provided on the sphere (18).

5. The hot blast stove flue gas recycling structure according to claim 1 is characterized in that: A track wheel (21) is provided at the air outlet of the heat collecting tube (4), and the first pull rope (7) is slidably connected inside the track wheel (21).

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