Smoke gas deflection prevention molten salt furnace

Abstract

The utility model discloses a kind of smoke gas deflection-preventing fused salt furnaces, including furnace body, inner ring coil pipe, middle ring coil pipe, outer ring coil pipe, top coil pipe, sealing cover, burner and flue, the furnace body includes shell component, furnace base and furnace top cover, the lower end portion of the shell component is connected with the furnace base, the furnace top cover is connected on the upper end portion of the shell component, the shell component, the furnace base and the furnace top cover are enclosed to form furnace cavity, the inner ring coil pipe, the middle ring coil pipe and the outer ring coil pipe are sequentially arranged in the furnace cavity from inside to outside, the top coil pipe is arranged in the furnace cavity and located above the inner ring coil pipe and the middle ring coil pipe, and the outer peripheral portion of the top coil pipe is connected with the upper end portion of the outer ring coil pipe.The utility model can avoid smoke gas deflection, can make smoke gas evenly flow distribution in furnace, and then can improve the heat exchange efficiency between smoke gas and fused salt, reduce heat loss, reduce energy consumption, can also prolong the service life of furnace tube.

Description

Technical Field

[0001] This utility model relates to a molten salt furnace that prevents flue gas from flowing out of control. Background Technology

[0002] Currently, molten salt furnaces are industrial heating devices that use molten salt as the heat transfer medium. For example, Chinese patent CN108826679A discloses a top-fired double-layer parallel spiral coil molten salt furnace. However, in most existing molten salt furnaces, the flue for exhausting flue gas is located on the side. This can lead to the risk of flue gas flow deviation within the furnace. Flue gas deviation causes uneven flow of high-temperature flue gas within the furnace, with a large amount of flue gas concentrating in a certain area, forming an overheated zone, while areas with less flue gas form a low-temperature zone. The flue gas in the overheated zone is discharged from the furnace before its heat is fully transferred to the molten salt, resulting in high exhaust gas temperature and significant heat loss. Meanwhile, the low-temperature zone, due to its low temperature, cannot fully heat the molten salt, leading to a significant decrease in heat exchange efficiency between the flue gas and molten salt and a significant increase in energy consumption. In addition, flue gas deviation can also cause excessively high flue gas velocity in local areas, intensifying the scouring of the furnace tubes and shortening their service life. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a molten salt furnace that prevents flue gas from flowing out of the furnace. It can prevent flue gas from flowing out of the furnace and make the flue gas flow and distribute evenly in the furnace, thereby improving the heat exchange efficiency between the flue gas and the molten salt, reducing heat loss, reducing energy consumption, and extending the service life of the furnace tubes.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a molten salt furnace for preventing flue gas deviation, comprising a furnace body, an inner coil, a middle coil, an outer coil, a top coil, a sealing cover, a burner, and a flue.

[0005] The furnace body includes a shell component, a furnace base, and a furnace top cover. The lower end of the shell component is connected to the furnace base, and the furnace top cover is connected to the upper end of the shell component. The shell component, the furnace base, and the furnace top cover surround and form a furnace cavity.

[0006] The inner coil, the middle coil, and the outer coil are arranged sequentially from the inside to the outside in the furnace cavity. The top coil is located in the furnace cavity and above the inner coil and the middle coil. The outer periphery of the top coil is connected to the upper end of the outer coil. The sealing cover is located in the furnace cavity and connected to the upper end of the top coil.

[0007] The inner coil has a radiation chamber on its inner side, a first convection chamber between the inner coil and the middle coil, a second convection chamber between the middle coil and the outer coil, a third convection chamber between the outer coil and the shell component, a flue gas chamber between the sealing top cover and the furnace top cover, the upper end of the radiation chamber is connected to the upper end of the first convection chamber and the upper end of the second convection chamber respectively, the lower end of the first convection chamber and the lower end of the second convection chamber are both connected to the lower end of the third convection chamber, and the upper end of the third convection chamber is connected to the flue gas chamber.

[0008] The burner is connected to the furnace base and is used to generate flue gas through combustion in the radiation chamber;

[0009] The flue is connected to the center of the furnace top cover and communicates with the flue gas chamber.

[0010] Furthermore, the molten salt furnace for preventing flue gas deviation also includes an inlet manifold and an outlet manifold;

[0011] The lower ends of the inner coil, the middle coil, and the outer coil are respectively connected to the inlet manifold.

[0012] The upper end of the outer coil is connected to the top coil;

[0013] The upper end of the inner coil, the upper end of the middle coil, and the top coil are respectively connected to the outlet manifold.

[0014] Furthermore, multiple positioning tubes are provided between the inner coil and the middle coil, and between the middle coil and the outer coil, respectively, arranged sequentially along the circumference.

[0015] Furthermore, the furnace base is connected to a first support, a second support, and a third support. The lower end of the inner coil is connected to the first support, the lower end of the middle coil is connected to the second support, and the lower end of the outer coil is connected to the third support.

[0016] Furthermore, the furnace base is equipped with a manhole with a viewing window and a nitrogen extinguishing port.

[0017] Furthermore, the furnace base includes a furnace bottom insulation layer and a furnace bottom refractory layer;

[0018] The furnace bottom refractory layer is provided with an installation port for installing the burner and a furnace lining portion that surrounds the outside of the installation port and protrudes downward.

[0019] The furnace bottom insulation layer is connected to the lower end of the furnace bottom refractory layer and surrounds the outside of the furnace lining.

[0020] The lower end of the inner coil is embedded in the refractory layer at the bottom of the furnace.

[0021] Furthermore, the sealing cover includes a cover plate, a top fire-resistant layer, and a plurality of foot spikes; wherein, the foot spikes are connected to the lower end face of the cover plate, the top fire-resistant layer is connected to the lower end face of the cover plate, and the foot spikes are embedded in the top fire-resistant layer.

[0022] Furthermore, the housing component is connected to a horizontal support, a lifting lug, and a temperature measuring device.

[0023] Furthermore, the shell component includes an inner cylinder, an outer cylinder, an upper sealing plate, a lower sealing plate, and a shell insulation layer;

[0024] The upper sealing plate is connected to the upper end of the inner cylinder and the upper end of the outer cylinder, respectively;

[0025] The lower sealing plate is connected to the lower end of the inner cylinder and the lower end of the outer cylinder, respectively;

[0026] The shell insulation layer is filled between the inner cylinder, the outer cylinder, the upper sealing plate, and the lower sealing plate;

[0027] The furnace top cover includes a top plate, a bottom plate, a surrounding plate, and a top cover insulation layer;

[0028] The surrounding panels are respectively connected to the outer periphery of the top plate and the outer periphery of the bottom plate;

[0029] The flue is connected to the inner periphery of the top plate and the inner periphery of the bottom plate, respectively.

[0030] The top cover insulation layer is filled between the top plate, the bottom plate, the surrounding plate and the flue.

[0031] Furthermore, a temperature measuring port is provided on the flue.

[0032] The above-mentioned technical solution involves inner, middle, outer, and top coils all made of furnace tubes. The burner, after burning natural gas, generates high-temperature flue gas in the radiant chamber. This flue gas then flows upwards within the radiant chamber and into the first and second convection chambers respectively. The flue gas in the first and second convection chambers then flows downwards and enters the third convection chamber. Finally, the flue gas in the third convection chamber flows upwards into the exhaust chamber and is discharged through the flue. The flue is positioned at the center of the furnace top cover, allowing for more uniform flue gas flow and preventing gas deviation, thus avoiding the formation of overheated and underheated zones. This improves the heat exchange efficiency between the flue gas and molten salt, reduces heat loss, and lowers energy consumption. Furthermore, preventing gas deviation also avoids excessively high flue gas velocities in localized areas, preventing severe erosion of local furnace tubes and extending their service life. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the molten salt furnace for preventing flue gas deviation according to this utility model.

[0034] Figure 2 for Figure 1 Detailed view of part A in the middle;

[0035] Figure 3 for Figure 1 Detailed view of section B in the middle;

[0036] Figure 4 This is a top view of the molten salt furnace for preventing flue gas deviation according to this utility model;

[0037] Figure 5 for Figure 1 CC section view;

[0038] In the diagram: 1. Inner coil; 2. Middle coil; 3. Outer coil; 4. Top coil; 5. Sealing cap; 6. Burner; 7. Flue; 8. Shell components; 9. Furnace base; 10. Furnace top cover; 11. Radiant chamber; 12. First convection chamber; 13. Second convection chamber; 14. Third convection chamber; 15. Exhaust chamber; 16. Inlet manifold; 17. Outlet manifold; 18. Positioning pipe; 19. First support; 20. Second support; 21. Third support; 22. With viewing... 23. Manhole for mirror; 24. Nitrogen extinguishing port; 25. Furnace bottom insulation layer; 26. Furnace bottom refractory layer; 27. Furnace lining; 28. Cover plate; 29. ​​Top refractory layer; 30. Foot nails; 31. Horizontal support; 32. Lifting lugs; 33. Temperature measuring device; 34. Inner cylinder; 35. Outer cylinder; 36. Upper sealing plate; 37. Lower sealing plate; 38. Shell insulation layer; 39. Top plate; 40. Bottom plate; 41. Enclosure plate; 42. Top cover insulation layer; 43. Temperature measuring port; 44. Steel structure. Detailed Implementation

[0039] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0040] like Figures 1-5 As shown, a molten salt furnace for preventing flue gas deviation includes a furnace body, an inner coil 1, a middle coil 2, an outer coil 3, a top coil 4, a sealing cover 5, a burner 6, and a flue 7.

[0041] The furnace body includes a shell component 8, a furnace base 9, and a furnace top cover 10. The lower end of the shell component 8 is connected to the furnace base 9, and the furnace top cover 10 is connected to the upper end of the shell component 8. The shell component 8, the furnace base 9, and the furnace top cover 10 surround and form a furnace cavity.

[0042] The inner coil 1, the middle coil 2, and the outer coil 3 are arranged sequentially from the inside to the outside in the furnace cavity. The top coil 4 is arranged in the furnace cavity and located above the inner coil 1 and the middle coil 2. The outer periphery of the top coil 4 is connected to the upper end of the outer coil 3. The sealing cap 5 is arranged in the furnace cavity and connected to the upper end of the top coil 4.

[0043] The inner coil 1 has a radiation chamber 11 on its inner side. A first convection chamber 12 is provided between the inner coil 1 and the middle coil 2. A second convection chamber 13 is provided between the middle coil 2 and the outer coil 3. A third convection chamber 14 is provided between the outer coil 3 and the shell component 8. A flue gas chamber 15 is provided between the sealing top cover and the furnace top cover 10. The upper end of the radiation chamber 11 is connected to the upper end of the first convection chamber 12 and the upper end of the second convection chamber 13, respectively. The lower end of the first convection chamber 12 and the lower end of the second convection chamber 13 are both connected to the lower end of the third convection chamber 14. The upper end of the third convection chamber 14 is connected to the flue gas chamber 15.

[0044] The burner 6 is connected to the furnace base 9 and is used to generate flue gas by combustion in the radiation chamber 11. The flue 7 is connected to the center of the furnace top cover 10 and communicates with the exhaust chamber 15.

[0045] Specifically, the inner coil 1, middle coil 2, outer coil 3, and top coil 4 are all wound from furnace tubes. The burner 6 generates high-temperature flue gas in the radiant chamber 11 after burning natural gas. The flue gas then flows upward in the radiant chamber 11 and flows into the first convection chamber 12 and the second convection chamber 13 respectively. The flue gas in the first convection chamber 12 and the second convection chamber 13 then flows downward and enters the third convection chamber 14. The flue gas in the third convection chamber 14 then flows upward into the exhaust chamber 15 and is finally discharged from the flue 7. The flue 7 is located at the center of the furnace top cover 10, which allows for a more uniform flow and distribution of flue gas, prevents flue gas deviation, and avoids the formation of overheated and underheated zones. This improves the heat exchange efficiency between the flue gas and molten salt, reduces heat loss, and lowers energy consumption. Furthermore, preventing flue gas deviation also avoids excessively high flue gas velocities in local areas, preventing severe scouring of local furnace tubes and thus extending the service life of the furnace tubes.

[0046] like Figures 1-5 As shown, the molten salt furnace for preventing flue gas deviation also includes an inlet manifold 16 and an outlet manifold 17;

[0047] The lower ends of the inner coil 1, the middle coil 2, and the outer coil 3 are respectively connected to the inlet manifold 16;

[0048] The upper end of the outer coil 3 is connected to the top coil 4;

[0049] The upper end of the inner coil 1, the upper end of the middle coil 2, and the top coil 4 are respectively connected to the outlet manifold 17. Specifically, the molten salt flowing into the inlet manifold 16 flows into the inner coil 1, the middle coil 2, and the outer coil 3, respectively. Then, the molten salt in the outer coil 3 flows into the top coil 4, and then the molten salt in the inner coil 1, the middle coil 2, and the top coil 4 converges and flows into the outlet manifold 17. The flue gas flowing in the radiation chamber 11, the first convection chamber 12, the second convection chamber 13, and the third convection chamber 14 exchanges heat with the molten salt flowing in the inner coil 1, the middle coil 2, the outer coil 3, and the top coil 4. The heat from the flue gas is transferred to the molten salt, raising its temperature and thus heating the molten salt. In this embodiment, an inner coil 1, a middle coil 2, an outer coil 3, and a top coil 4 are provided to ensure a sufficiently large heating area, thereby improving the heat exchange efficiency between the flue gas and the molten salt. In this embodiment, the furnace tubes in the inner coil 1, the middle coil 2, and the top coil 4 all pass through the sealing cover 5 and emerge from the side of the shell component 8 to communicate with the outlet manifold 17.

[0050] like Figure 5As shown, multiple positioning tubes 18 are arranged sequentially along the circumference between the inner coil 1 and the middle coil 2, and between the middle coil 2 and the outer coil 3. Specifically, the positioning tubes 18 ensure uniform width throughout the first convection chamber 12 and the second convection chamber 13, thereby enabling uniform distribution and flow of flue gas and further preventing flue gas deviation. In this embodiment, six positioning tubes 18 are evenly distributed between the inner coil 1 and the middle coil 2, and between the middle coil 2 and the outer coil 3.

[0051] like Figure 1 , 2 As shown, the furnace base 9 is connected to a first support 19, a second support 20, and a third support 21. The lower end of the inner coil 1 is connected to the first support 19, the lower end of the middle coil 2 is connected to the second support 20, and the lower end of the outer coil 3 is connected to the third support 21. Specifically, the first support 19 ensures that the inner coil 1 stands upright without deformation, the second support 20 ensures that the middle coil 2 stands upright without deformation, and the third support 21 ensures that the outer coil 3 stands upright without deformation.

[0052] like Figure 1 , 2 As shown in Figure 5, the furnace base 9 is provided with a manhole 22 with a sight glass and a nitrogen extinguishing port 23; specifically, the manhole 22 with a sight glass allows for convenient observation of the flame combustion and facilitates inspection and maintenance.

[0053] like Figure 1 , 2 As shown, the furnace base 9 may include a furnace bottom insulation layer 24 and a furnace bottom refractory layer 25;

[0054] The furnace bottom refractory layer 25 is provided with an installation port for installing the burner 6 and a furnace lining portion 26 that surrounds the outside of the installation port and protrudes downward.

[0055] The furnace bottom insulation layer 24 is connected to the lower end of the furnace bottom refractory layer 25 and surrounds the outside of the furnace lining 26;

[0056] The lower end of the inner coil 1 is embedded in the furnace bottom refractory layer 25 to prevent smoke from escaping; specifically, the furnace bottom insulation layer 24 is made of ceramic fiber cotton, and the furnace bottom refractory layer 25 is made of heavy refractory castable.

[0057] like Figure 1 , 3As shown, the sealing cover 5 may include a cover plate 27, a top fire-resistant layer 28, and a plurality of foot spikes 29; wherein, the foot spikes 29 are connected to the lower end surface of the cover plate 27, the top fire-resistant layer 28 is connected to the lower end surface of the cover plate 27, and the foot spikes 29 are embedded in the top fire-resistant layer 28; specifically, the top fire-resistant layer 28 may be cast from refractory castable.

[0058] like Figure 1 , 4 As shown in Figure 5, the shell component 8 is connected to a horizontal support 30, a lifting lug 31, and a temperature measuring device 32; specifically, the horizontal support 30 is provided so that the molten salt furnace for preventing flue gas deviation in this embodiment can be repeatedly erected and laid down, thereby facilitating relocation and transportation.

[0059] like Figures 1-3 As shown, the shell component 8 may include an inner cylinder 33, an outer cylinder 34, an upper sealing plate 35, a lower sealing plate 36, and a shell insulation layer 37;

[0060] The upper sealing plate 35 is connected to the upper end of the inner cylinder 33 and the upper end of the outer cylinder 34, respectively;

[0061] The lower sealing plate 36 is connected to the lower end of the inner cylinder 33 and the lower end of the outer cylinder 34, respectively;

[0062] The shell insulation layer 37 is filled between the inner cylinder 33, the outer cylinder 34, the upper sealing plate 35 and the lower sealing plate 36;

[0063] The furnace top cover 10 may include a top plate 38, a bottom plate 39, a surrounding plate 40, and a top cover insulation layer 41;

[0064] The surrounding panels 40 are respectively connected to the outer periphery of the top plate 38 and the outer periphery of the bottom plate 39;

[0065] The flue 7 is connected to the inner periphery of the top plate 38 and the inner periphery of the bottom plate 39, respectively.

[0066] The top cover insulation layer 41 is filled between the top plate 38, the bottom plate 39, the surrounding plate 40 and the flue 7. The materials of the shell insulation layer 37 and the top cover insulation layer 41 can both be aluminum silicate fiber cotton.

[0067] like Figure 1 , 4 As shown, the flue 7 is provided with a temperature measuring port 42 to monitor the exhaust temperature; in this embodiment, the bottom of the furnace body is also provided with a steel structure 43 for supporting the furnace body, and the entire furnace body is raised by the steel structure 43 to facilitate the installation of the burner 6.

[0068] In summary, the inner coil 1, middle coil 2, outer coil 3, and top coil 4 are all wound from furnace tubes. The burner 6 generates high-temperature flue gas in the radiant chamber 11 after burning natural gas. The flue gas then flows upward in the radiant chamber 11 and flows into the first convection chamber 12 and the second convection chamber 13 respectively. The flue gas in the first convection chamber 12 and the second convection chamber 13 then flows downward and enters the third convection chamber 14. The flue gas in the third convection chamber 14 then flows upward into the exhaust chamber 15 and is finally discharged from the flue 7. The flue 7 is located at the center of the furnace top cover 10, which allows for a more uniform flow and distribution of flue gas, prevents flue gas deviation, and avoids the formation of overheated and underheated zones. This improves the heat exchange efficiency between the flue gas and molten salt, reduces heat loss, and lowers energy consumption. Furthermore, preventing flue gas deviation also avoids excessively high flue gas velocities in local areas, preventing severe scouring of local furnace tubes and thus extending the service life of the furnace tubes.

[0069] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A molten salt furnace for preventing flue gas deviation, characterized in that, This includes the furnace body, inner coil, middle coil, outer coil, top coil, sealing cover, burner, and flue. The furnace body includes a shell component, a furnace base, and a furnace top cover. The lower end of the shell component is connected to the furnace base, and the furnace top cover is connected to the upper end of the shell component. The shell component, the furnace base, and the furnace top cover surround and form a furnace cavity. The inner coil, the middle coil, and the outer coil are arranged sequentially from the inside to the outside in the furnace cavity. The top coil is located in the furnace cavity and above the inner coil and the middle coil. The outer periphery of the top coil is connected to the upper end of the outer coil. The sealing cover is located in the furnace cavity and connected to the upper end of the top coil. The inner coil has a radiation chamber on its inner side, a first convection chamber between the inner coil and the middle coil, a second convection chamber between the middle coil and the outer coil, a third convection chamber between the outer coil and the shell component, a flue gas chamber between the sealing cover and the furnace top cover, the upper end of the radiation chamber is connected to the upper end of the first convection chamber and the upper end of the second convection chamber respectively, the lower end of the first convection chamber and the lower end of the second convection chamber are both connected to the lower end of the third convection chamber, and the upper end of the third convection chamber is connected to the flue gas chamber. The burner is connected to the furnace base and is used to generate flue gas through combustion in the radiation chamber; The flue is connected to the center of the furnace top cover and communicates with the flue gas chamber.

2. The molten salt furnace for preventing flue gas deviation according to claim 1, characterized in that, It also includes import manifolds and export manifolds; The lower ends of the inner coil, the middle coil, and the outer coil are respectively connected to the inlet manifold. The upper end of the outer coil is connected to the top coil; The upper end of the inner coil, the upper end of the middle coil, and the top coil are respectively connected to the outlet manifold.

3. The molten salt furnace for preventing flue gas deviation according to claim 1, characterized in that, Multiple positioning tubes are provided between the inner coil and the middle coil, and between the middle coil and the outer coil, respectively, arranged sequentially along the circumference.

4. The molten salt furnace for preventing flue gas deviation according to claim 1, characterized in that, The furnace base is connected to a first support, a second support, and a third support. The lower end of the inner coil is connected to the first support, the lower end of the middle coil is connected to the second support, and the lower end of the outer coil is connected to the third support.

5. The molten salt furnace for preventing flue gas deviation according to claim 1, characterized in that, The furnace base is equipped with a manhole with a sight glass and a nitrogen extinguishing port.

6. The molten salt furnace for preventing flue gas deviation according to claim 1, characterized in that, The furnace base includes a furnace bottom insulation layer and a furnace bottom refractory layer; The furnace bottom refractory layer is provided with an installation port for installing the burner and a furnace lining portion that surrounds the outside of the installation port and protrudes downward. The furnace bottom insulation layer is connected to the lower end of the furnace bottom refractory layer and surrounds the outside of the furnace lining. The lower end of the inner coil is embedded in the refractory layer at the bottom of the furnace.

7. The molten salt furnace for preventing flue gas deviation according to claim 1, characterized in that, The sealing cover includes a cover plate, a top fire-resistant layer, and multiple foot spikes; wherein the foot spikes are connected to the lower end face of the cover plate, the top fire-resistant layer is connected to the lower end face of the cover plate, and the foot spikes are embedded in the top fire-resistant layer.

8. The molten salt furnace for preventing flue gas deviation according to claim 1, characterized in that, The shell component is connected to a horizontal support, a lifting lug, and a temperature measuring device.

9. The molten salt furnace for preventing flue gas deviation according to claim 1, characterized in that, The shell components include an inner cylinder, an outer cylinder, an upper sealing plate, a lower sealing plate, and a shell insulation layer; The upper sealing plate is connected to the upper end of the inner cylinder and the upper end of the outer cylinder, respectively; The lower sealing plate is connected to the lower end of the inner cylinder and the lower end of the outer cylinder, respectively; The shell insulation layer is filled between the inner cylinder, the outer cylinder, the upper sealing plate, and the lower sealing plate; The furnace top cover includes a top plate, a bottom plate, a surrounding plate, and a top cover insulation layer; The surrounding panels are respectively connected to the outer periphery of the top plate and the outer periphery of the bottom plate; The flue is connected to the inner periphery of the top plate and the inner periphery of the bottom plate, respectively. The top cover insulation layer is filled between the top plate, the bottom plate, the surrounding plate and the flue.

10. The molten salt furnace for preventing flue gas deviation according to claim 1, characterized in that, Temperature measuring ports are provided on the flue.

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