A rare earth metal electrolysis waste heat recovery device

Abstract

The utility model relates to the technical field of rare earth metal electrolysis, and discloses a waste heat recovery device for rare earth metal electrolysis, comprising: a recovery tank, which is cylindrical; a heat exchange structure, which comprises a first heat absorption tube, which is arranged inside the recovery tank; a water circulation structure, which comprises a second heat absorption tube, which is inserted and arranged inside the first heat absorption tube; a smoke pipe connection structure, which comprises a first smoke pipe clamping groove, which is arranged on the top of the recovery tank; a heat-resistant layer, which is painted on the inner wall of the recovery tank; a first gas transmission pipe, which is fixedly installed at one end of the second heat absorption tube; and a first exhaust pipe, which is fixedly installed at the other end of the second heat absorption tube, so as to achieve the purpose of fully absorbing waste heat of flue gas, improve the efficiency of waste heat absorption of flue gas, fully recycle and utilize waste heat of flue gas, quickly cool down the device, and improve the convenience of using the device.

Description

Technical Field

[0001] This utility model belongs to the field of rare earth metal electrolysis technology, specifically, it relates to a rare earth metal electrolysis waste heat recovery device. Background Technology

[0002] During the rare earth metal electrolysis process, the electrolytic furnace generates a large amount of heat. If this heat cannot be effectively recovered and utilized, it will not only cause energy waste, but may also affect the service life of the electrolytic furnace.

[0003] Utility model CN216115462U belongs to the field of rare earth metal smelting technology, specifically relating to a waste heat recovery device for rare earth metal smelting and processing. It includes a flue gas pipe, a hot water absorption tank fixedly connected to the outside of the flue gas pipe, a heat absorption pipe fixedly connected inside the hot water absorption tank, a water outlet pipe fixedly connected to the hot water absorption tank, a connecting pipe fixedly connected to one end of the heat absorption pipe, a connecting cap threadedly connected inside the connecting pipe, a water inlet pipe fixedly connected inside the connecting cap, a sealing ring bonded inside the connecting pipe, and a limit block fixedly connected to the outside of the connecting pipe. This utility model, by adding a heat absorption pipe and an insulation cylinder to the hot water absorption tank, allows direct contact between the heat absorption pipe and the flue gas inside the flue gas pipe during use. Furthermore, the water is preheated by the heat absorption pipe before entering the hot water absorption tank, thereby effectively improving the heat absorption efficiency of the device.

[0004] However, the above-mentioned patent still has the following problems: during the process of transporting flue gas to the flue gas pipe for waste heat recovery, the contact area between the flue gas and the inner wall of the heat absorption pipe is small, the waste heat recovery efficiency is slow, the device has a low degree of waste heat recovery from the flue gas, and some dust and dirt in the flue gas will adhere to the inner wall of the heat absorption pipe, consuming the service life of the heat absorption pipe, resulting in poor durability of the device and inconvenience in using the device.

[0005] In view of this, this utility model is proposed. Utility Model Content

[0006] To solve the aforementioned technical problem of poor flue gas waste heat recovery efficiency, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A rare earth metal electrolysis waste heat recovery device, comprising:

[0008] The recycling bins are cylindrical in shape.

[0009] A heat exchange structure, comprising a first heat absorption tube, which is disposed inside a recovery tank;

[0010] The water circulation structure includes a second heat absorption tube, which is inserted inside the first heat absorption tube.

[0011] The smoke pipe connection structure includes a first smoke pipe clamping groove, which is located on the top of the recycling tank.

[0012] A heat-resistant layer is applied to the inner wall of the recycling tank.

[0013] The first gas supply pipe is fixedly installed at one end of the second heat absorption pipe;

[0014] The first exhaust pipe is fixedly installed at the other end of the second heat absorption pipe.

[0015] In a preferred embodiment of the present invention, the heat exchange structure further includes spiral fins fixedly installed on the outer wall of the first heat absorption tube, the number of spiral fins being eight sets, a second fixing sleeve being provided inside the recovery tank, the first heat absorption tube being provided inside the second fixing sleeve, and the first fixing sleeve being fixedly installed on the outer wall of the second fixing sleeve.

[0016] In a preferred embodiment of the present invention, the heat exchange structure further includes a first fixed circular plate fixedly installed on the top of the first heat absorption tube, a second fixed circular plate fixedly installed on the bottom of the first heat absorption tube, one end of the first gas supply pipe extending to the outside of the recovery tank and fixedly installed with a first gas supply valve, and one end of the first exhaust pipe extending to the outside of the recovery tank and fixedly installed with a first exhaust valve.

[0017] In a preferred embodiment of the present invention, the water circulation structure further includes a first fixed sleeve disposed inside the recovery tank, the inner wall of the first fixed sleeve being fixedly connected to the outer wall of the second fixed sleeve, a spiral water guide plate being fixedly installed on the inner wall of the recovery tank, and a set of first snap-fit ​​ring plates and a set of second snap-fit ​​ring plates being snap-fitted inside the recovery tank.

[0018] In a preferred embodiment of the present invention, the water circulation structure further includes a first water inlet fixedly installed inside the first snap-fit ​​ring plate, a hole is opened at the bottom of the second snap-fit ​​ring plate, a first water outlet is fixedly installed in the hole, and the outer wall of the first fixing sleeve is tightly attached to the inner wall of the first snap-fit ​​ring plate and the second snap-fit ​​ring plate.

[0019] In a preferred embodiment of this utility model, the smoke pipe connection structure further includes a first smoke pipe connector disposed on the top of the recycling tank. The first smoke pipe connector has a first smoke pipe snap-fit ​​groove inside. A second mesh plate is fixedly installed inside the first smoke pipe snap-fit ​​groove. The first smoke pipe connector is snap-fitted onto the top of a first fixed circular plate. A set of first mesh plates is fixedly installed on the outer wall of the first fixed circular plate. The bottom of the second mesh plate is in close contact with the top of the set of first mesh plates.

[0020] In a preferred embodiment of the present invention, the flue connection structure further includes a second flue connector disposed at the bottom of the second fixed circular plate, another set of first mesh plates being fixedly installed inside the second fixed circular plate, a second flue snap-fit ​​groove being provided inside the second flue connector, a third mesh plate being fixedly installed inside the second flue snap-fit ​​groove, and the top of the third mesh plate being in close contact with the bottom of the other set of first mesh plates.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. To achieve the purpose of fully absorbing the waste heat of flue gas, improve the efficiency of waste heat absorption, fully recover and utilize the waste heat in the flue gas, and facilitate rapid cooling of the device after use, thereby improving the convenience of the device.

[0023] 2. By using water for heat recovery treatment, the heat energy in the flue gas can be recovered and utilized, thereby improving resource utilization efficiency, convenience of use of the equipment, and heat recovery efficiency of the equipment.

[0024] 3. It achieves the purpose of conveying flue gas and filtering impurities in the flue gas, reducing the situation of impurities adhering to the inner wall of the device, making it easier for users to clean the device and reducing the cleaning pressure of the device.

[0025] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0026] In the attached diagram:

[0027] Figure 1 This is a schematic diagram of the recycling tank structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the second smoke pipe connector of this utility model;

[0029] Figure 3 This is a schematic diagram of the heat-resistant layer structure of this utility model;

[0030] Figure 4 This is an exploded view of the first fixing sleeve and the first smoke pipe connector of this utility model;

[0031] Figure 5 This is a schematic diagram of the first heat-absorbing tube structure of this utility model.

[0032] In the diagram: 10. Recycling tank; 11. First retaining ring plate; 12. First water inlet; 13. Second retaining ring plate; 14. First water outlet; 15. Spiral water guide plate; 16. Heat-resistant layer; 17. First fixing sleeve; 18. Second fixing sleeve; 19. First fixing circular plate; 20. Second fixing circular plate; 21. First heat absorption pipe; 22. Second heat absorption pipe; 23. Spiral fins; 24. First mesh plate; 25. First flue pipe connector; 26. First flue pipe retaining groove; 27. Second mesh plate; 28. First gas supply pipe; 29. ​​First gas supply valve; 30. First exhaust pipe; 31. First exhaust valve; 32. Second flue pipe connector; 33. Second flue pipe retaining groove; 34. Third mesh plate. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0034] Example 1: A rare earth metal electrolysis waste heat recovery device, specifically as follows... Figure 1 and Figure 4 As shown, the system includes a recovery tank 10, which is cylindrical; a heat exchange structure, including a first heat absorption pipe 21 disposed inside the recovery tank 10; a water circulation structure, including a second heat absorption pipe 22 inserted inside the first heat absorption pipe 21; a flue pipe connection structure, including a first flue pipe clamping groove 26 disposed on the top of the recovery tank 10; a heat-resistant layer 16 coated on the inner wall of the recovery tank 10; a first gas delivery pipe 28 fixedly installed at one end of the second heat absorption pipe 22; and a first exhaust pipe 30 fixedly installed at the other end of the second heat absorption pipe 22. The waste heat of the flue gas is recovered and utilized through the heat exchange structure, water is circulated through the water circulation structure, and the flue gas pipes are connected through the flue pipe connection structure.

[0035] Specifically, such as Figure 1 , Figure 4 and Figure 5As shown, the heat exchange structure also includes eight sets of spiral fins 23 fixedly installed on the outer wall of the first heat-absorbing tube 21. A second fixing sleeve 18 is provided inside the recovery tank 10, and the first heat-absorbing tube 21 is located inside the second fixing sleeve 18. A first fixing sleeve 17 is fixedly installed on the outer wall of the second fixing sleeve 18. The first fixing sleeve 17 and the second fixing sleeve 18 limit the movement of the first heat-absorbing tube 21. The spiral fins 23 increase the contact area between the flue gas and the first and second heat-absorbing tubes 21 and 22, extending the residence time of the flue gas inside the first heat-absorbing tube 21. The first and second heat-absorbing tubes 21 and 22 absorb the waste heat of the flue gas.

[0036] Specifically, such as Figure 1 , Figure 4 and Figure 5 As shown, the heat exchange structure also includes a first fixed circular plate 19 fixedly installed on the top of the first heat absorption pipe 21, a second fixed circular plate 20 fixedly installed on the bottom of the first heat absorption pipe 21, one end of the first gas supply pipe 28 extending to the outside of the recovery tank 10 and fixedly installed with a first gas supply valve 29, and one end of the first exhaust pipe 30 extending to the outside of the recovery tank 10 and fixedly installed with a first exhaust valve 31. The heat absorption pipe is rapidly cooled through the first gas supply valve 29 and the first exhaust valve 31.

[0037] Based on the above, the structure of the first fixed sleeve 17, the second fixed sleeve 18, the first fixed circular plate 19, the second fixed circular plate 20, the first heat absorption pipe 21, the second heat absorption pipe 22, the spiral fins 23, the first gas supply valve 29, the first exhaust pipe 30, and the first exhaust valve 31 achieves the purpose of fully absorbing the waste heat of the flue gas, improving the efficiency of waste heat absorption, fully recovering and utilizing the waste heat in the flue gas, and also facilitating rapid cooling of the device after use, thus improving the convenience of using the device.

[0038] Example 2: Based on Example 1, specifically as follows... Figure 1 , Figure 2 and Figure 3 As shown, the water circulation structure also includes a first fixed sleeve 17 disposed inside the recovery tank 10. The inner wall of the first fixed sleeve 17 is fixedly connected to the outer wall of the second fixed sleeve 18. A spiral water guide plate 15 is fixedly installed on the inner wall of the recovery tank 10. A set of first snap-fit ​​ring plates 11 and a set of second snap-fit ​​ring plates 13 are snap-fitted and installed inside the recovery tank 10. The first snap-fit ​​ring plates 11 and the second snap-fit ​​ring plates 13 are snap-fitted and installed inside the recovery tank 10 to limit the position of the first fixed sleeve 17 and the second fixed sleeve 18.

[0039] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown, the water circulation structure also includes a first water inlet 12 fixedly installed inside the first snap-fit ​​ring plate 11, and a hole opened at the bottom of the second snap-fit ​​ring plate 13, in which a first water outlet 14 is fixedly installed. The outer wall of the first fixing sleeve 17 is in close contact with the inner walls of the first snap-fit ​​ring plate 11 and the second snap-fit ​​ring plate 13. Water is injected into the recovery tank 10 through the first water inlet 12, and the water inside the recovery tank 10 is output through the first water outlet 14. The spiral water guide plate 15 increases the water flow velocity and improves the heat recovery effect of the device.

[0040] Based on the above, the structure consisting of the first retaining ring plate 11, the first water inlet 12, the second retaining ring plate 13, the first water outlet 14, the spiral water guide plate 15, the heat-resistant layer 16, the first fixed sleeve 17, and the second fixed sleeve 18 allows for heat recovery treatment via water, enabling the recovery and utilization of heat energy in the flue gas, improving resource utilization efficiency, enhancing the ease of use of the device, and increasing the heat recovery efficiency of the device.

[0041] Example 3: Based on Examples 1 and 2, specifically as follows... Figure 1 , Figure 2 and Figure 4 As shown, the flue pipe connection structure also includes a first flue pipe connector 25 disposed on the top of the recovery tank 10. The first flue pipe connector 25 has a first flue pipe clamping groove 26 inside, and a second perforated plate 27 is fixedly installed inside the first flue pipe clamping groove 26. The first flue pipe connector 25 is clamped and installed on the top of the first fixed circular plate 19. A set of first perforated plates 24 are fixedly installed on the outer wall of the first fixed circular plate 19. The bottom of the second perforated plate 27 is in close contact with the top of the set of first perforated plates 24. By clamping and installing the first flue pipe connector 25 on the top of the first fixed circular plate 19, flue gas is transported through the second perforated plate 27 and the first perforated plate 24 to the interior of the first heat absorption pipe 21.

[0042] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, the flue connection structure also includes a second flue connector 32 disposed at the bottom of the second fixed circular plate 20. Another set of first mesh plates 24 are fixedly installed inside the second fixed circular plate 20. A second flue clamping groove 33 is formed inside the second flue connector 32. A third mesh plate 34 is fixedly installed inside the second flue clamping groove 33, with the top of the third mesh plate 34 tightly abutting the bottom of the other set of first mesh plates 24. The second flue connector 32 is clamped and installed inside the second fixed circular plate 20, allowing the recovered flue gas to be discharged through the third mesh plate 34 and the first mesh plate 24.

[0043] In summary, the structure of the first perforated plate 24, the first flue pipe connector 25, the first flue pipe clamping groove 26, the second perforated plate 27, the second flue pipe connector 32, the second flue pipe clamping groove 33, and the third perforated plate 34 achieves the purpose of conveying flue gas and filtering impurities in the flue gas, reducing the situation of impurities adhering to the inner wall of the device, making it easier for users to clean the device and reducing the cleaning pressure of the device.

[0044] Working Principle: Flue gas is guided into the recovery tank 10 through the flue pipe connection structure (including the first flue pipe connector 25 and the second flue pipe connector 32). It is first initially dispersed by the first perforated plate 24, and then enters the first heat-absorbing pipe 21 and the second heat-absorbing pipe 22 of the heat exchange structure. The spiral fins 23 on the outer wall of the first heat-absorbing pipe 21 increase the contact area between the flue gas and the heat-absorbing pipe, prolonging the residence time of the flue gas in the heat-absorbing pipe, thereby improving the heat exchange efficiency. The heat in the flue gas is absorbed by the first heat-absorbing pipe 21 and the second heat-absorbing pipe 22 through heat conduction. Simultaneously, the water flow inside the second heat-absorbing pipe 22 is also heated. When rapid cooling is required, the gas can flow rapidly through the first gas supply pipe 28 and the first exhaust pipe 30 to remove heat from the heat-absorbing pipe, achieving rapid cooling. Water is injected into the recovery tank 10 through the first water inlet 12. Guided by the spiral water guide plate 15, the water flow forms a certain flow pattern within the recovery tank, increasing the water flow velocity and thus improving the heat exchange efficiency with the first heat-absorbing pipe 21 and the second heat-absorbing pipe 22. The heat exchange efficiency of the two heat-absorbing tubes 22 is such that the heated water flows out of the recovery tank through the first outlet 14 and can be used for other processes or as a hot water supply. The first fixed sleeve 17 and the second fixed sleeve 18 limit the first heat-absorbing tube 21 to ensure its stable position in the recovery tank. At the same time, the first snap-fit ​​ring plate 11 and the second snap-fit ​​ring plate 13 further fix the sleeve. The flue gas enters the recovery tank 10 through the first flue pipe snap-fit ​​groove 26 and the second flue pipe snap-fit ​​groove 33, and is evenly distributed into the first heat-absorbing tube 21 and the second heat-absorbing tube 22 under the guidance of the second mesh plate 27 and the third mesh plate 34. The recovered flue gas is discharged through the first mesh plate 24 to ensure the effective flow and heat exchange of the flue gas in the recovery tank.

[0045] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A rare earth metal electrolysis waste heat recovery device, characterized in that: include: A recovery tank (10), the recovery tank (10) is cylindrical; A heat exchange structure, the heat exchange structure comprising a first heat absorption tube (21), the first heat absorption tube (21) being arranged inside the recovery tank (10); A water circulation structure, the water circulation structure comprising a second heat absorbing tube (22), the second heat absorbing tube (22) being inserted into the interior of the first heat absorbing tube (21); A smoke pipe connection structure, the smoke pipe connection structure comprising a first smoke pipe clamping groove (26), the first smoke pipe clamping groove (26) being arranged on the top of the recovery tank (10); A heat-resistant layer (16), the heat-resistant layer (16) being coated on the inner wall of the recovery tank (10); A first air delivery pipe (28), the first air delivery pipe (28) being fixedly mounted on one end of the second heat absorbing pipe (22); A first exhaust pipe (30) is fixedly mounted on the other end of the second heat absorbing pipe (22).

2. The rare earth metal electrolysis waste heat recovery device according to claim 1, characterized in that: The heat exchange structure further comprises a spiral fin (23) fixedly mounted on the outer wall of the first heat absorption tube (21), the number of the spiral fins (23) being eight groups, a second fixed sleeve (18) being arranged inside the recovery tank (10), the first heat absorption tube (21) being arranged inside the second fixed sleeve (18), and the first fixed sleeve (17) being fixedly mounted on the outer wall of the second fixed sleeve (18).

3. The rare earth metal electrolysis waste heat recovery device according to claim 1, characterized in that: The heat energy exchange structure further comprises a first fixed circular plate (19) fixedly mounted on the top of the first heat absorbing tube (21); a second fixed circular plate (20) fixedly mounted on the bottom of the first heat absorbing tube (21); one end of the first gas delivery pipe (28) extends to the outside of the recovery tank (10) and is fixedly mounted with a first gas delivery valve (29); and one end of the first exhaust pipe (30) extends to the outside of the recovery tank (10) and is fixedly mounted with a first exhaust valve (31).

4. The rare earth metal electrolysis waste heat recovery device according to claim 1, characterized in that: The water circulation structure further comprises a first fixed sleeve (17) arranged inside the recovery tank (10), the inner wall of the first fixed sleeve (17) being fixedly connected to the outer wall of the second fixed sleeve (18), a spiral water guide plate (15) being fixedly mounted on the inner wall of the recovery tank (10), and a group of first clamping ring plates (11) and a group of second clamping ring plates (13) being clamped and mounted inside the recovery tank (10).

5. The rare earth metal electrolysis waste heat recovery device according to claim 1, characterized in that: The water circulation structure further comprises a first water inlet (12) fixedly mounted inside the first clamping ring plate (11); a hole is provided at the bottom of the second clamping ring plate (13); a first water outlet (14) is fixedly mounted inside the hole; and an outer wall of the first fixed sleeve (17) is in close contact with the inner walls of the first clamping ring plate (11) and the second clamping ring plate (13).

6. The rare earth metal electrolysis waste heat recovery device according to claim 1, characterized in that: The smoke pipe connection structure further comprises a first smoke pipe connection piece (25) arranged on the top of the recovery tank (10); a first smoke pipe clamping groove (26) is provided inside the first smoke pipe connection piece (25); a second mesh plate (27) is fixedly installed inside the first smoke pipe clamping groove (26); the first smoke pipe connection piece (25) is clamped and installed on the top of the first fixed circular plate (19); a group of first mesh plates (24) are fixedly installed on the outer wall of the first fixed circular plate (19); and the bottom of the second mesh plate (27) is in close contact with the top of the group of first mesh plates (24).

7. The rare earth metal electrolysis waste heat recovery device according to claim 1, characterized in that: The cigarette pipe connection structure further comprises a second cigarette pipe connection piece (32) arranged at the bottom of the second fixed circular plate (20); another group of first mesh plates (24) are fixedly mounted inside the second fixed circular plate (20); a second cigarette pipe clamping groove (33) is provided inside the second cigarette pipe connection piece (32); a third mesh plate (34) is fixedly mounted inside the second cigarette pipe clamping groove (33); the top of the third mesh plate (34) is in close contact with the bottom of another group of first mesh plates (24).

Images