Metallurgical gas waste heat recovery device

Abstract

The utility model relates to a metallurgical gas waste heat recovery device which comprises a box body, a high-temperature waste heat recovery sheet and a low-temperature waste heat recovery sheet. The box body is provided with a high-temperature air inlet, an air outlet, a first mounting hole and a second mounting hole, wherein the first mounting hole and the second mounting hole are sequentially formed in the air flowing direction. The high-temperature waste heat recovery piece is parallel to the gas flowing direction, the first end penetrates through the first mounting hole to be located in the box body, and the second end is detachably connected with the box body. The low-temperature waste heat recovery piece is rotatably connected to the second mounting hole, and the rotation range is from parallel to vertical to the airflow direction. The high-temperature waste heat recovery sheet is matched with the low-temperature waste heat recovery sheet, the high-temperature waste heat recovery sheet is used for efficiently recovering high-temperature waste heat in the direction parallel to the airflow direction, meanwhile, by means of the rotation adjusting function of the low-temperature waste heat recovery sheet, the adaptability to different working conditions is enhanced, and the low-temperature waste heat recovery efficiency is improved; the problems of single temperature recovery mode, inconvenience in cleaning and lack of adaptive adjustment in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery from metallurgical gas, and more specifically to a waste heat recovery device for metallurgical gas. Background Technology

[0002] In the metallurgical gas production process, the gas typically has a high temperature and carries a large amount of waste heat. Traditional technologies often employ conventional waste heat recovery devices to recover this heat from the metallurgical gas. However, these traditional devices have the following drawbacks:

[0003] Single-temperature recovery mode: Traditional waste heat recovery devices typically only recover high-temperature waste heat, or are inefficient in recovering low-temperature waste heat, failing to effectively integrate and utilize both high-temperature and low-temperature waste heat. For example, some devices may only have a simple heat exchanger in the high-temperature section of the gas, while failing to fully recover the waste heat after the gas temperature drops, resulting in a large amount of low-temperature waste heat being wasted and low energy utilization.

[0004] Fixed structure makes cleaning difficult: The internal structure of traditional devices is often relatively fixed. After long-term operation, dust, dirt and other impurities easily accumulate inside the device, affecting the efficiency of waste heat recovery. Moreover, because the structure is not disassembled or is difficult to disassemble, cleaning and maintenance are extremely inconvenient, requiring a lot of time and manpower for disassembly and cleaning, and may even lead to partial damage to the equipment, increasing maintenance costs and the risk of equipment failure.

[0005] Lack of adaptive adjustment: Existing waste heat recovery devices have poor adaptability when handling gas at different temperatures and flow rates. For example, for the low-temperature waste heat recovery section, the contact area and angle with the airflow cannot be adjusted in real time according to the direction and speed of the airflow, resulting in unsatisfactory waste heat recovery under different operating conditions and failing to achieve the best energy-saving effect.

[0006] Therefore, how to provide a new waste heat recovery device for metallurgical coal gas that is easy to clean and can also be adapted to the temperature of the coal gas is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] In view of this, the present invention provides a metallurgical gas waste heat recovery device, which aims to solve the problems of the above-mentioned traditional waste heat recovery devices being inconvenient to clean and unable to adapt to the gas temperature.

[0008] A waste heat recovery device for metallurgical gas, comprising:

[0009] The box has a high-temperature air inlet at the top and an exhaust port at the bottom. Mounting holes one and two are sequentially provided on the box between the high-temperature air inlet and the exhaust port along the gas flow direction. There are multiple mounting holes one and two, which are arranged perpendicular to the gas flow direction.

[0010] Multiple high-temperature waste heat recovery plates are arranged parallel to the gas flow direction. The first end of each high-temperature waste heat recovery plate passes through the corresponding mounting hole and is located inside the box. The second end of each plate is detachably connected to the side wall of the box corresponding to the mounting hole.

[0011] Multiple low-temperature waste heat recovery plates are provided. The first end of each low-temperature waste heat recovery plate passes through the second mounting hole and is located inside the box. The second end of each plate is rotatably connected to the side wall of the box corresponding to the second mounting hole. The rotation range of the low-temperature waste heat recovery plate is from parallel to the airflow direction to perpendicular to the gas flow direction.

[0012] Through the above technical solution, this utility model achieves efficient recovery of high-temperature waste heat while facilitating installation and maintenance by arranging the high-temperature waste heat recovery plate parallel to the gas flow direction and detachably connecting it to the housing; by rotating the low-temperature waste heat recovery plate to the housing and adjusting its relative angle with the airflow, it achieves adaptability to different working conditions and improves the efficiency of low-temperature waste heat recovery, thereby enhancing the flexibility of the device and the overall waste heat recovery effect.

[0013] Preferably, the high-temperature waste heat recovery plate includes a support frame and a refrigerant copper pipe. The first end of the support frame passes through the mounting hole and is located inside the box. The second end of the support frame is detachably connected to the side wall of the box corresponding to the mounting hole. The refrigerant copper pipe is serpentinely wound between the first and second ends of the support frame, and its inlet and outlet are located outside the box.

[0014] Preferably, a fixing block is fixedly connected to the side wall of the box along its height direction, and the fixing block has a mounting hole that penetrates the inside of the box. The second end of the support frame is detachably connected to the fixing block.

[0015] Preferably, it also includes a positioning block, which is fixedly connected to the inner wall of the box and arranged opposite to the mounting hole. The positioning hole is provided on the opposite surface of the positioning block and the mounting hole. The first end of the support frame is fixedly connected to a positioning post arranged corresponding to the positioning hole, and the positioning post is inserted into the positioning hole.

[0016] Preferably, it also includes a sealing ring, and the outer surface of the fixing block is provided with a mounting groove along the edge of the mounting hole. The sealing ring is installed in the mounting groove and is elastically sealed between the fixing block and the second end of the support frame.

[0017] Preferably, the low-temperature waste heat recovery plate includes a mounting plate and a second refrigerant copper pipe. The mounting plate is rotatably connected to the side wall of the housing at the corresponding mounting hole two. The second refrigerant copper pipe is fixedly connected to the mounting plate, and its inlet and outlet are located outside the housing.

[0018] Preferably, a fixed truncated cone is fixedly connected to the side wall of the box below the fixed block one. The fixed truncated cone has a second mounting hole that penetrates the inside of the box. A rotating groove is formed around the edge of the second mounting hole on the outer surface of the fixed truncated cone. A rotating ring corresponding to and rotatably connected to the rotating groove is fixedly connected to the opposite side of the mounting plate and the fixed truncated cone.

[0019] Preferably, it also includes a second sealing ring, which is installed in the rotating groove and elastically seals between the bottom surface of the rotating groove and the rotating ring.

[0020] Preferably, it also includes a locking ring, the cylindrical surface of the fixed truncated cone is threaded, and the locking ring is helically connected to the thread to lock the mounting plate and the fixed truncated cone.

[0021] Preferably, it also includes a second positioning block, and a positioning base plate is fixedly connected to the end of the second refrigerant copper pipe away from the mounting plate. The second positioning block is fixedly connected to the inner wall of the box and is arranged opposite to the second mounting hole. The second positioning hole is opened on the opposite surface of the second positioning block and the second mounting hole. A rotating column corresponding to the second positioning hole is fixedly connected to the positioning base plate, and the rotating column is rotatably connected to the second positioning hole.

[0022] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a metallurgical gas waste heat recovery device, which has the following beneficial effects: by setting multiple high-temperature waste heat recovery plates and low-temperature waste heat recovery plates, high-temperature and low-temperature waste heat are recovered respectively, realizing the comprehensive recovery and utilization of waste heat in different temperature ranges of coal gas, and improving the energy utilization rate. Attached Figure Description

[0023] Figure 1 A three-dimensional schematic diagram of a waste heat recovery device for metallurgical gas provided by this utility model;

[0024] Figure 2 A partial cross-sectional view of a metallurgical gas waste heat recovery device provided by this utility model;

[0025] Figure 3 for Figure 2 A magnified view of a section at point A;

[0026] Figure 4 for Figure 2 A magnified view of section B;

[0027] Figure 5 for Figure 2 A magnified view of section C;

[0028] Figure 6 for Figure 2 A magnified view of a section at point D;

[0029] Figure 7 A partial sectional view of the box body provided by this utility model;

[0030] Figure 8 A three-dimensional schematic diagram of the high-temperature waste heat recovery plate provided by this utility model;

[0031] Figure 9 A three-dimensional schematic diagram of the low-temperature waste heat recovery plate provided by this utility model;

[0032] Figure 10 A three-dimensional schematic diagram of the locking ring provided by this utility model.

[0033] The components are: 1-Box body; 2-High temperature waste heat recovery plate; 3-Low temperature waste heat recovery plate; 4-Sealing ring one; 5-Sealing ring two; 6-Locking ring; 11-High temperature air inlet; 12-Exhaust port; 13-Mounting hole one; 14-Mounting hole two; 15-Fixing block one; 16-Positioning block one; 17-Fixing frustum; 18-Positioning block two; 21-Support frame; 22-Refrigerant copper pipe one; 31-Mounting plate; 32-Refrigerant copper pipe two; 33-Positioning base plate; 34-Rotating column; 61-Allowing hole; 62-Sealing ring groove; 161-Positioning hole one; 181-Positioning hole two; 211-Positioning column; 311-Rotating ring; 312-Rotating block. Detailed Implementation

[0034] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0035] See appendix Figure 1-10 This utility model discloses a metallurgical gas waste heat recovery device, including: a box 1, multiple high-temperature waste heat recovery plates 2 and multiple low-temperature waste heat recovery plates 3;

[0036] The top of the housing 1 is provided with a high-temperature air inlet 11 and the bottom is provided with an exhaust port 12. The housing 1 between the high-temperature air inlet 11 and the exhaust port 12 is provided with mounting holes 13 and 14 in sequence along the gas flow direction. There are multiple mounting holes 13 and 14, which are arranged perpendicular to the gas flow direction.

[0037] Multiple high-temperature waste heat recovery plates 2 are parallel to the gas flow direction. The first end of the high-temperature waste heat recovery plate 2 passes through the corresponding mounting hole 13 and is located inside the box 1. Its second end is detachably connected to the side wall of the box 1 with the corresponding mounting hole 13.

[0038] The first end of multiple low-temperature waste heat recovery plates 3 passes through the second mounting hole 14 and is located inside the housing 1. The second end is rotatably connected to the side wall of the housing 1 corresponding to the second mounting hole 14. The rotation range of the low-temperature waste heat recovery plates 3 is from parallel to the airflow direction to perpendicular to the gas flow direction.

[0039] Specifically, there are 7 mounting holes 13 and 2 high-temperature waste heat recovery plates, and 3 mounting holes 14 and 3 low-temperature waste heat recovery plates.

[0040] More specifically, the second end of the high-temperature waste heat recovery plate 2 is detachably connected to the side wall of the housing 1 with the corresponding mounting hole 13 by bolts.

[0041] In some embodiments, the high-temperature waste heat recovery plate 2 includes a support frame 21 and a refrigerant copper pipe 22. The first end of the support frame 21 passes through a mounting hole 13 and is located inside the housing 1. The second end of the support frame 21 is detachably connected to the side wall of the housing 1 corresponding to the mounting hole 13. The refrigerant copper pipe 22 is serpentinely wound between the first and second ends of the support frame 21, with its inlet and outlet located outside the housing 1. Thus, the high-temperature waste heat recovery plate 2, with its support frame 21 and serpentine refrigerant copper pipe 22, increases the contact area with the high-temperature gas, which is beneficial for fully absorbing the waste heat in the gas and improving the efficiency of high-temperature waste heat recovery.

[0042] In other embodiments, a fixing block 15 is fixedly connected to the side wall of the housing 1 along its height direction. The fixing block 15 has a mounting hole 13 that penetrates the interior of the housing 1. The second end of the support frame 21 is detachably connected to the fixing block 15. Thus, the wall thickness of the housing 1 can be increased by the fixing block 15, which facilitates drilling threaded bottom holes.

[0043] Specifically, there are 7 fixed blocks 15.

[0044] In other embodiments, a positioning block 16 is also included. The positioning block 16 is fixedly connected to the inner wall of the housing 1 and is arranged opposite to the mounting hole 13. A positioning hole 161 is provided on the opposite surface of the positioning block 16 and the mounting hole 13. A positioning post 211 corresponding to the positioning hole 161 is fixedly connected to the first end of the support frame 21. The positioning post 211 is inserted into the positioning hole 161. Thus, the first end of the support frame 21 can be stably supported by the insertion of the positioning post 211 into the positioning hole 161, thereby improving the overall stability of the support frame 21.

[0045] Specifically, there are 7 positioning blocks 16, which are arranged opposite to the 7 mounting holes 13.

[0046] In one embodiment, a sealing ring 4 is also included. An installation groove is formed on the outer surface of the fixing block 15 along the edge of the mounting hole 13. The sealing ring 4 is installed in the installation groove and elastically seals between the fixing block 15 and the second end of the support frame 21. Thus, the sealing ring 4 effectively prevents gas leakage from the gap between the support frame 21 and the fixing block 15, ensuring the airtightness of the housing 1, guaranteeing the effect of waste heat recovery, and also contributing to the safe operation of the equipment.

[0047] Specifically, there are 7 sealing rings 4, which are arranged corresponding to the 7 mounting holes 13. The sealing rings 4 are high-temperature resistant sealing rings such as ceramic sealing rings and metal sealing rings.

[0048] In one embodiment, the low-temperature waste heat recovery plate 3 includes a mounting plate 31 and a refrigerant copper pipe 32. The mounting plate 31 is rotatably connected to the side wall of the housing 1 at the corresponding mounting hole 14, and the refrigerant copper pipe 32 is fixedly connected to the mounting plate 31 with its inlet and outlet located outside the housing 1. This facilitates installation and layout, and also makes it convenient to maintain and repair the refrigerant copper pipe 32.

[0049] Specifically, the outer surface of the mounting plate 31 is fixedly connected to the two sides of the refrigerant copper pipe 32 with rotating blocks 312 for rotating the low-temperature waste heat recovery plate 3.

[0050] In some embodiments, a fixed frustum 17 is fixedly connected to the side wall of the housing 1 below the fixed block 15. The fixed frustum 17 has a mounting hole 14 penetrating the interior of the housing 1. A rotating groove is formed around the edge of the mounting hole 14 on the outer surface of the fixed frustum 17. A rotating ring 311, corresponding to and rotatably connected to the rotating groove, is fixedly connected to the opposite surface of the mounting plate 31 and the fixed frustum 17. Thus, the rotatable connection between the rotating ring 311 and the rotating groove facilitates rapid positioning of the low-temperature waste heat recovery plate 3 with the housing 1 during installation.

[0051] Specifically, there are 3 fixed truncated cones 17.

[0052] In this embodiment, a second sealing ring 5 is also included. The second sealing ring 5 is installed in the rotating groove and is elastically sealed between the bottom surface of the rotating groove and the rotating ring 311.

[0053] Specifically, there are 3 sealing rings 2 5, which are arranged corresponding to the 3 mounting holes 2 14. The sealing rings 2 5 are high temperature resistant sealing rings such as ceramic sealing rings and metal sealing rings.

[0054] Preferably, it also includes a locking ring 6. The cylindrical surface of the fixed frustum 17 is threaded, and the locking ring 6 is screwed to the thread to lock the mounting plate 31 and the fixed frustum 17.

[0055] Specifically, a clearance groove is provided on the opposite surface of the locking ring 6 and the fixed truncated cone 17. The side wall of the clearance groove is spirally connected to the cylindrical surface of the fixed truncated cone 17. A clearance hole 61 is provided on the bottom surface of the clearance groove. A sealing ring groove 62 is provided around the clearance hole 61 on the bottom surface of the clearance groove. A sealing ring 3 is installed in the sealing ring groove 62 and is elastically sealed between the bottom surface of the sealing ring groove 62 and the opposite surface of the mounting plate 31.

[0056] More specifically, the rotating block 312 passes through the clearance hole 61 and protrudes onto the outer surface of the locking ring 6.

[0057] In some specific embodiments, a second positioning block 18 is also included. A positioning base plate 33 is fixedly connected to the end of the second refrigerant copper pipe 32 away from the mounting plate 31. The second positioning block 18 is fixedly connected to the inner wall of the housing 1 and arranged opposite to the second mounting hole 14. A positioning hole 181 is provided on the opposite surface of the second positioning block 18 and the second mounting hole 14. A rotating column 34, corresponding to the positioning hole 181, is fixedly connected to the positioning base plate 33. The rotating column 34 is rotatably connected to the positioning hole 181. Thus, the rotating column 34 and the positioning hole 181 provide stable support and positioning for the end of the second refrigerant copper pipe 32 away from the mounting plate 31.

[0058] Specifically, the rotating column 34 and the rotating ring 311 are arranged coaxially.

[0059] More specifically, there are three positioning blocks 18, which are arranged opposite to the three mounting holes 14.

[0060] The specific principle of the metallurgical gas waste heat recovery device provided in this embodiment is as follows:

[0061] High-temperature coal gas enters through the high-temperature inlet 11 at the top of the housing 1, flows sequentially through the high-temperature waste heat recovery plate 2 and the low-temperature waste heat recovery plate 3, and finally exits through the exhaust port 12 at the bottom of the housing. The high-temperature waste heat recovery plate 2 includes a support frame 21 and a serpentine coiled refrigerant copper pipe 22, which is detachably connected to the housing 1 for easy disassembly and cleaning, and efficiently recovers the high-temperature waste heat from the coal gas. The low-temperature waste heat recovery plate 3 includes a mounting plate 31 and a refrigerant copper pipe 32, which is rotatably connected to the housing 1 and allows adjustment of its relative angle with the airflow to adapt to the low-temperature waste heat recovery requirements under different operating conditions. Furthermore, the device uses sealing rings 4 and 5 to seal the connection points of the high-temperature and low-temperature waste heat recovery plates respectively, preventing leakage and ensuring the efficiency and safety of waste heat recovery.

[0062] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A waste heat recovery device for metallurgical gas, characterized in that, include: The box body (1) has a high-temperature air inlet (11) at its top and an exhaust port (12) at its bottom. The box body (1) between the high-temperature air inlet (11) and the exhaust port (12) has a first mounting hole (13) and a second mounting hole (14) in sequence along the gas flow direction. There are multiple first mounting holes (13) and second mounting holes (14), which are arranged perpendicular to the gas flow direction. Multiple high-temperature waste heat recovery plates (2) are parallel to the gas flow direction. The first end of each high-temperature waste heat recovery plate (2) passes through the corresponding mounting hole (13) and is located inside the housing (1). Its second end is detachably connected to the side wall of the housing (1) corresponding to the mounting hole (13). Multiple low-temperature waste heat recovery plates (3) are provided. The first end of each of the multiple low-temperature waste heat recovery plates (3) passes through the second mounting hole (14) and is located inside the housing (1). The second end of each plate is rotatably connected to the side wall of the housing (1) corresponding to the second mounting hole (14). The rotation range of the low-temperature waste heat recovery plates (3) is from parallel to the airflow direction to perpendicular to the gas flow direction.

2. The metallurgical gas waste heat recovery device according to claim 1, characterized in that, The high-temperature waste heat recovery plate (2) includes a support frame (21) and a refrigerant copper pipe (22). The first end of the support frame (21) passes through the mounting hole (13) and is located inside the housing (1). The second end of the support frame (21) is detachably connected to the side wall of the housing (1) corresponding to the mounting hole (13). The refrigerant copper pipe (22) is serpentinely wound between the first end and the second end of the support frame (21), and its inlet and outlet are located outside the housing (1).

3. The metallurgical gas waste heat recovery device according to claim 2, characterized in that, A fixing block (15) is fixedly connected to the side wall of the box (1) along its height direction. The fixing block (15) has an installation hole (13) that penetrates the interior of the box (1). The second end of the support frame (21) is detachably connected to the fixing block (15).

4. The metallurgical gas waste heat recovery device according to claim 2, characterized in that, It also includes a positioning block (16), which is fixedly connected to the inner wall of the box (1) and arranged opposite to the mounting hole (13). A positioning hole (161) is provided on the opposite surface of the positioning block (16) and the mounting hole (13). A positioning post (211) corresponding to the positioning hole (161) is fixedly connected to the first end of the support frame (21), and the positioning post (211) is inserted into the positioning hole (161).

5. The metallurgical gas waste heat recovery device according to claim 3, characterized in that, It also includes a sealing ring (4), and the outer surface of the fixing block (15) is provided with an installation groove along the edge of the mounting hole (13). The sealing ring (4) is installed in the installation groove and is elastically sealed between the fixing block (15) and the second end of the support frame (21).

6. The metallurgical gas waste heat recovery device according to claim 3, characterized in that, The low-temperature waste heat recovery plate (3) includes a mounting plate (31) and a second refrigerant copper pipe (32). The mounting plate (31) is rotatably connected to the side wall of the box (1) corresponding to the second mounting hole (14). The second refrigerant copper pipe (32) is fixedly connected to the mounting plate (31) and its inlet and outlet are located outside the box (1).

7. The metallurgical gas waste heat recovery device according to claim 6, characterized in that, A fixed frustum (17) is fixedly connected to the side wall of the box (1) below the fixed block (15). The fixed frustum (17) has a second mounting hole (14) that penetrates the interior of the box (1). A rotating groove is formed around the edge of the second mounting hole (14) on the outer surface of the fixed frustum (17). A rotating ring (311) that corresponds to and is rotatably connected to the opposite side of the mounting plate (31) and the fixed frustum (17) is fixedly connected to the mounting plate (31).

8. The metallurgical gas waste heat recovery device according to claim 7, characterized in that, It also includes a second sealing ring (5), which is installed in the rotating groove and elastically seals between the bottom surface of the rotating groove and the rotating ring (311).

9. The metallurgical gas waste heat recovery device according to claim 8, characterized in that, It also includes a locking ring (6), the cylindrical surface of the fixed truncated cone (17) is threaded, and the locking ring (6) is helically connected to the thread to lock the mounting plate (31) and the fixed truncated cone (17).

10. The metallurgical gas waste heat recovery device according to claim 7, characterized in that, It also includes a second positioning block (18), and a positioning base plate (33) is fixedly connected to one end of the second refrigerant copper pipe (32) away from the mounting plate (31). The second positioning block (18) is fixedly connected to the inner wall of the box (1) and arranged opposite to the second mounting hole (14). A second positioning hole (181) is opened on the opposite surface of the second positioning block (18) and the second mounting hole (14). A rotating column (34) corresponding to the second positioning hole (181) is fixedly connected to the positioning base plate (33). The rotating column (34) is rotatably connected to the second positioning hole (181).

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