Efficient and energy-saving metallurgical furnace flue gas waste heat recovery device

Abstract

The utility model relates to the field of metallurgical furnace flue gas waste heat recovery, and discloses an efficient and energy-saving metallurgical furnace flue gas waste heat recovery device which comprises a shell, a plurality of sets of heat exchange pipes are arranged in the shell, the multiple sets of heat exchange pipes penetrate through and are fixedly connected to the front surface and the rear surface of the shell, a cleaning assembly is arranged in the shell, and the cleaning assembly is fixedly connected to the front surface and the rear surface of the shell. The cleaning assembly comprises four sets of fixing frames which are fixedly connected to the positions, close to the left inner wall and the right inner wall, of the inner wall of the shell and located above and below the shell and a servo motor fixedly installed on the left side surface of the shell, and guide frames are slidably connected to the opposite faces of every two sets of fixing frames in the vertical direction. According to the waste heat recovery device, the guide frame drives the guide plate and the multiple sets of felts to stably and linearly move front and back, the felts are driven to conduct full-automatic cleaning on the surface of the heat exchange pipe, it is ensured that the heat exchange pipe always keeps efficient heat exchange performance, the problem that the heat exchange efficiency is reduced due to dust accumulation in a traditional waste heat recovery device is effectively solved, and the waste heat recovery efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery from metallurgical furnace flue gas, and in particular to a high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas. Background Technology

[0002] In the metallurgical industry, metallurgical furnaces are one of the key pieces of equipment. When metallurgical furnaces are in operation, they generate a large amount of high-temperature flue gas. If the waste heat carried by these flue gas is directly discharged, it will not only waste energy but also aggravate environmental pollution. Therefore, how to efficiently recover and utilize the waste heat in these flue gas has become an important issue for the metallurgical industry to save energy, reduce emissions, and improve energy efficiency.

[0003] In traditional metallurgical furnace flue gas waste heat recovery devices, dust in the flue gas adheres to the surface of the heat exchange tubes during long-term operation, forming an ash layer that seriously affects heat exchange efficiency and may even lead to equipment damage, increasing the operating costs of enterprises. Therefore, a high-efficiency and energy-saving metallurgical furnace flue gas waste heat recovery device is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas, which aims to improve the problem in the prior art that "dust in the flue gas will adhere to the surface of the heat exchange tube to form an ash layer, which seriously affects the heat exchange efficiency".

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas, comprising a shell, wherein multiple sets of heat exchange tubes are arranged inside the shell, and the multiple sets of heat exchange tubes are all connected through and fixedly connected to the front and rear surfaces of the shell. A cleaning assembly is arranged inside the shell, the cleaning assembly comprising four sets of fixing frames fixedly connected to the inner wall of the shell near the left and right inner walls and located at the top and bottom, and a servo motor fixedly installed on the left side surface of the shell. A guide frame is slidably connected to the opposing surfaces of every two sets of fixing frames in the vertical direction. Slider blocks are fixedly connected to both the top and bottom ends. The four sets of sliders are slidably connected to the inner walls of the four sets of fixed frames. Guide rods are slidably connected to the outer sides of the middle of the two sets of guide frames. Connecting rods are fixedly connected to the outer ends of the two sets of guide rods. Rotating rods are fixedly connected to the right side of the output shaft of the servo motor. The ends of the two sets of connecting rods away from the guide rods are fixedly connected to the outer walls of the rotating rods. A guide plate is fixedly connected between the two sets of guide frames. The guide plate passes through and is set outside the multiple sets of heat exchange tubes. Through holes are opened on the guide plate and the outer sides of the multiple sets of heat exchange tubes respectively. Two sets of felt are sleeved on the outer walls of the multiple sets of heat exchange tubes.

[0006] As a further description of the above technical solution:

[0007] The rotating rod is rotatably connected to the inside of the housing, and a sealing plate is provided at the rotatable connection between the rotating rod and the housing. Multiple sets of felt are rotatably connected to the inner wall of the through hole of the guide plate.

[0008] As a further description of the above technical solution:

[0009] Both the slider and the inner wall of the fixed frame are designed in a dovetail rectangular shape.

[0010] As a further description of the above technical solution:

[0011] The two sets of connecting rods are arranged at an angle.

[0012] As a further description of the above technical solution:

[0013] The felt is provided with an installation component on its exterior. The installation component includes two sets of installation frames. The two sets of felt are snapped into the inner walls of the two sets of installation frames. The right end of the circular opening of the left installation frame is provided with a slot. The left end of the circular opening of the right installation frame is fixedly connected with a locking block. The two sets of locking blocks are inserted into the inner walls of the two sets of slots. The outer walls of the two sets of installation frames are provided with locking grooves.

[0014] As a further description of the above technical solution:

[0015] The two sets of mounting frames pass through the through hole, and the felt is fixedly installed on the inner wall of the through hole by two sets of snap rings respectively snapped into the inner wall of the corresponding slot. The two sets of snap rings and the two sets of slots are set on the front and rear surfaces of the guide plate.

[0016] As a further description of the above technical solution:

[0017] Both sets of mounting frames are symmetrically arranged in a semi-circular shape.

[0018] As a further description of the above technical solution:

[0019] Both sets of felt are symmetrically arranged in semi-circles on the inner walls of the two sets of card blocks.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the servo motor drives the rotating rod, connecting rod and guide rod to rotate, so that the guide frame drives the guide plate and multiple sets of felt to move back and forth in a stable linear motion. This causes the felt to automatically clean the surface of the heat exchange tube, ensuring that the heat exchange tube always maintains high heat exchange performance. This effectively solves the problem of reduced heat exchange efficiency caused by ash accumulation in traditional waste heat recovery devices and improves waste heat recovery efficiency.

[0022] 2. In this utility model, the design of the snap ring, the slot, and the mounting frame forms a detachable installation method. By removing the snap ring, the two sets of mounting frames can be quickly removed, which facilitates the quick replacement of the felt, further reducing maintenance costs and improving maintenance efficiency and service life. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;

[0024] Figure 2 This is a three-dimensional cross-sectional view of the shell in this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the guide plate, connecting rod, and rotating rod of this utility model;

[0026] Figure 4 This is a three-dimensional structural disassembly diagram of the guide plate and mounting frame of this utility model;

[0027] Figure 5 This is a three-dimensional structural disassembly diagram of the mounting frame, felt, and retaining spring in this utility model.

[0028] Legend:

[0029] 1. Housing; 2. Cleaning assembly; 3. Mounting assembly; 4. Heat exchanger tube; 21. Guide plate; 22. Rotating rod; 23. Servo motor; 24. Connecting rod; 25. Fixing frame; 26. Guide rod; 27. Guide frame; 28. Slider; 29. ​​Felt; 31. Mounting frame; 32. Snap ring; 33. Slot; 34. Slot; 35. Locking block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 , Figure 2 and Figure 4This utility model provides an embodiment of a high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas, comprising a shell 1, which is the main body of the waste heat recovery furnace. The shell 1 has a flue gas inlet at the top, a flue gas outlet at the bottom, a water outlet at the top, and a water inlet at the bottom on the front surface. The shell 1 is formed by bolts. A control button for a servo motor 23 is provided on the outer wall of the shell 1. Multiple sets of heat exchange tubes 4 are installed inside the shell 1, all penetrating and fixedly connected to the front and rear surfaces of the shell 1. Waste heat in the hot gas is recovered through the heat exchange tubes 4. A cleaning component 2 is installed inside the shell 1, comprising components fixedly connected to the inner wall of the shell 1 near the left and right inner walls. The four sets of fixed frames 25 located at the top and bottom and the servo motor 23 fixedly installed on the left side surface of the housing 1 are all made of high-strength aluminum alloy. The dovetail rectangular design of its inner wall not only provides a stable sliding track for the slider 28, but also effectively prevents the slider 28 from shifting or falling off during the sliding process. The servo motor 23 is a high-torque, high-precision servo drive motor with the characteristics of fast response and precise control. Each pair of fixed frames 25 in the upper and lower directions is slidably connected to the opposite surfaces of the guide frame 27. The guide frame 27 is made of high-strength aluminum alloy. The sliders 28 at its upper and lower ends cooperate with the dovetail grooves on the inner wall of the fixed frame 25 to ensure that the guide frame 27 can only slide in the horizontal direction.

[0032] Furthermore, sliders 28 are fixedly connected to the upper and lower ends of both sets of guide frames 27. The sliders 28 are made of high-strength aluminum alloy, and their dovetail-shaped design perfectly matches the inner wall of the fixed frame 25, providing stable guidance and support. Four sets of sliders 28 are slidably connected to the inner walls of the four sets of fixed frames 25. Guide rods 26 are slidably connected to the outer middle of both sets of guide frames 27. The guide rods 26 are high-precision linear optical axes, with surfaces hardened and chrome-plated, possessing extremely high hardness and wear resistance. The sliding fit between the guide rods 26 and the guide frames 27... To ensure smooth and stable sliding of the guide frame 27 and reduce frictional resistance, the outer ends of both sets of guide rods 26 are fixedly connected to connecting rods 24. The connecting rods 24 are inclined and made of high-strength stainless steel, which has good strength and corrosion resistance. The inclined angle is set so that when the rotating rod 22 rotates, the rotational motion can be converted into the reciprocating linear motion of the guide frame 27. The right side of the output shaft of the servo motor 23 is fixedly connected to the rotating rod 22, which is made of high-strength alloy steel and has good rigidity and fatigue resistance.

[0033] Furthermore, the ends of the two sets of connecting rods 24 away from the guide rods 26 are fixedly connected to the outer wall of the rotating rod 22. A guide plate 21 is fixedly connected between the two sets of guide frames 27. The guide plate 21 is made of high-temperature resistant and high-strength stainless steel plate, and the surface is polished to be smooth and flat. The felt 29 is precisely matched with the outer diameter of the heat exchange tube 4 to ensure that the felt 29 can tightly fit the outer wall surface of the heat exchange tube 4 during the movement of the guide plate 21, effectively cleaning the accumulated dust, thereby improving the waste heat recovery effect and further improving the high efficiency and energy saving effect. The guide plate 21 runs through and is set on the outside of multiple sets of heat exchange tubes 4. The guide plate 21 and the multiple sets of heat exchange tubes 4 are connected to each other. Corresponding through holes are provided on the outside of the heat pipe 4. Two sets of felt 29 are sleeved on the outer wall of each heat exchange pipe 4. The felt 29 is made of special fiber material with high temperature resistance and high adsorption capacity, and has good flexibility and wear resistance. Its semi-circular structure design can tightly wrap the heat exchange pipe 4. Under the action of the guide plate 21, the surface of the heat exchange pipe 4 is cleaned in all directions. The surface of the felt 29 is specially treated and has anti-static function, which can effectively adsorb the fine dust particles in the flue gas. In addition, the felt 29 has a certain degree of elasticity and can adapt to the slight unevenness of the surface of the heat exchange pipe 4 during the cleaning process to ensure the cleaning effect.

[0034] Reference Figure 2 , Figure 3 and Figure 4 The rotating rod 22 is rotatably connected to the inside of the housing 1. A sealing plate is provided at the rotatable connection between the rotating rod 22 and the housing 1. Multiple sets of felt 29 are rotatably connected to the inner wall of the through hole of the guide plate 21. The inner wall of the slider 28 and the fixed frame 25 are both set in a dovetail rectangular shape. The two sets of connecting rods 24 are set in an inclined shape.

[0035] Reference Figure 1 , Figure 4 and Figure 5The felt 29 is externally equipped with a mounting assembly 3, which includes two sets of mounting frames 31. Each mounting frame 31 has a symmetrical semi-circular structure, is made of high-strength aluminum alloy, and has an inner wall with anti-slip grooves to increase friction with the felt 29, securing it and preventing it from loosening during use. The two sets of felt 29 are engaged with the inner walls of the two sets of mounting frames 31. The right end of the circular opening of the left mounting frame 31 has a slot 33, and the left end of the circular opening of the right mounting frame 31 has a fixed locking block 35. The locking blocks 35, inserted into the slots 33, increase the stability of the two sets of mounting frames 31. The two sets of locking blocks 35 are inserted into the inner walls of the two sets of slots 33. The outer walls of both sets of mounting frames 31 also have locking... The groove 34 has two sets of mounting frames 31 penetrating through the through hole, and the felt 29 is fixedly installed on the inner wall of the through hole by two sets of snap rings 32 respectively snapped into the inner wall of the corresponding slot 34. The two sets of snap rings 32 and the two sets of slots 34 are set on the front and rear surfaces of the guide plate 21. The two sets of mounting frames 31 are symmetrically semi-circular, and the two sets of felt 29 are symmetrically semi-circularly set on the inner wall of the two sets of clips 35. By installing the two sets of felt 29 on the inner wall of the two sets of mounting frames 31, the two sets of mounting frames 31 are spliced ​​together. At this time, after the two sets of mounting frames 31 are installed into the through hole of the guide plate 21, they are quickly fixed by snapping into the two sets of slots 34 by the two sets of snap rings 32. The clips 35 and snap rings 32 are made of high-strength stainless steel and have good elasticity and fatigue resistance.

[0036] Working principle: In use, first connect the external power supply and switch to the electrical equipment in this device. When the felt 29 needs to be replaced, open the housing 1, press the retaining spring 32 to remove it from the slot 34, and then remove the two sets of mounting frames 31. Replace the two sets of felt 29 inside. After replacement, the two sets of felt 29 can be reinstalled into the two sets of mounting frames 31. With the two sets of retaining blocks 35 inserted into the two sets of slots 33, the two sets of mounting frames 31 are initially fixed. At this time, the two sets of mounting frames 31 that have been spliced ​​and installed are reinserted into the through holes, and with the two sets of retaining springs 32 re-clamped into the two sets of slots 34, they can be quickly fixed, which makes it convenient to replace the felt 29 and improves its service life.

[0037] During the waste heat recovery process, dust gradually accumulates on the surface of the heat exchange tube 4, affecting the heat exchange efficiency. This can be addressed by starting the servo motor 23, which drives the rotating rod 22 to rotate. The rotation of the rotating rod 22 drives the connecting rod 24 and the guide rod 26 to rotate. The guide rod 26 is slidably connected inside the guide frame 27, thereby moving the guide frame 27. The sliders 28 at the upper and lower ends of the guide frame 27 slide in the dovetail rectangular inner wall of the fixed frame 25, allowing the guide frame 27 to move stably back and forth. The guide frame 27 drives the guide plate 21 to move. The felt 29 on the guide plate 21 is tightly attached to the surface of the heat exchange tube 4. The movement of the felt 29 cleans the outer wall of the heat exchange tube 4 in all directions. The felt 29 is made of high-temperature resistant, high-absorption special fiber material. Its anti-static treatment enables it to effectively adsorb tiny dust particles, and its elastic design can adapt to the unevenness of the surface of the heat exchange tube 4, ensuring the cleaning effect.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas, comprising a shell (1), characterized in that: The shell (1) is provided with heat exchange tubes (4) and multiple sets of them are provided. The multiple sets of heat exchange tubes (4) are all connected through and fixed to the front and rear surfaces of the shell (1). The shell (1) is provided with cleaning components (2). The cleaning component (2) includes four sets of fixed frames (25) fixedly connected to the inner wall of the housing (1) near the left and right inner walls and located at the top and bottom, and a servo motor (23) fixedly installed on the left side surface of the housing (1). Each pair of fixed frames (25) in the up and down direction is slidably connected to a guide frame (27) on opposite sides. The upper and lower ends of each pair of guide frames (27) are fixedly connected to sliders (28). The four sets of sliders (28) are slidably connected to the inner walls of the four sets of fixed frames (25). The outer side of the middle part of each pair of guide frames (27) is slidably connected to a guide rod (26). The outer ends of the guide rods (26) are all fixedly connected to the connecting rods (24). The right side of the output shaft of the servo motor (23) is fixedly connected to the rotating rod (22). The ends of the two sets of connecting rods (24) away from the guide rods (26) are fixedly connected to the outer wall of the rotating rod (22). The two sets of guide frames (27) are fixedly connected to the guide plate (21). The guide plate (21) passes through and is set outside the multiple sets of heat exchange tubes (4). The guide plate (21) and the external part of the multiple sets of heat exchange tubes (4) are respectively provided with through holes. The outer walls of the multiple sets of heat exchange tubes (4) are all fitted with two sets of felt (29).

2. The high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas according to claim 1, characterized in that: The rotating rod (22) is rotatably connected inside the housing (1). A sealing plate is provided at the rotatable connection between the rotating rod (22) and the housing (1). Multiple sets of felt (29) are rotatably connected and installed on the inner wall of the through hole of the guide plate (21).

3. The high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas according to claim 1, characterized in that: The inner walls of both the slider (28) and the fixed frame (25) are set in a dovetail rectangular shape.

4. The high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas according to claim 1, characterized in that: The two sets of connecting rods (24) are arranged at an angle.

5. The high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas according to claim 1, characterized in that: The felt (29) is provided with an installation component (3) on its exterior. The installation component (3) includes two sets of installation frames (31). The two sets of felt (29) are snapped into the inner walls of the two sets of installation frames (31). The right end of the circular opening of the left installation frame (31) is provided with a slot (33). The left end of the circular opening of the right installation frame (31) is fixedly connected with a locking block (35). The two sets of locking blocks (35) are inserted into the inner walls of the two sets of slots (33). The outer walls of the two sets of installation frames (31) are provided with a locking groove (34).

6. The high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas according to claim 5, characterized in that: The two sets of mounting frames (31) pass through the through hole, and the felt (29) is fixedly installed on the inner wall of the through hole by two sets of snap rings (32) respectively snapped into the inner wall of the corresponding slot (34). The two sets of snap rings (32) and the two sets of slots (34) are set on the front and rear surfaces of the guide plate (21).

7. The high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas according to claim 5, characterized in that: Both sets of mounting frames (31) are symmetrically arranged in a semi-circular shape.

8. The high-efficiency and energy-saving waste heat recovery device for metallurgical furnace flue gas according to claim 5, characterized in that: Both sets of felt (29) are symmetrical semi-circularly arranged on the inner walls of the two sets of card blocks (35).

Images