Combined heating type sludge deep dewatering and drying device

Abstract

The invention relates to the related technical field of sludge drying, and discloses a combined heating type sludge deep dewatering and drying device which comprises a drying box body, a first heating cavity, a drying cavity and a second heating cavity are formed in the drying box body, a first conveying assembly and a second conveying assembly are arranged on the upper portion of the drying cavity, and a large circulating fan is arranged on the lower portion of the drying cavity. A plurality of small circulating fans are arranged in the middle of the second heating cavity; according to the invention, large-circulation and small-circulation hot air is matched with microwave heating, so that the effects of deep drying of sludge, energy conservation and capacity improvement are achieved through reciprocating circulation. Under the synergistic effect, microwaves are responsible for internal heating, and water is forced to migrate outwards; hot air is responsible for surface dehumidification and timely takes away moisture. The two cooperate to overcome the defect of a single technology, and the drying rate is far higher than that of single hot air or microwave drying.

Description

Technical Field

[0001] This invention belongs to the technical field of sludge drying, and more specifically, it relates to a combined heating type sludge deep dewatering and drying device. Background Technology

[0002] With the acceleration of urbanization and increasingly stringent environmental protection requirements in my country, the production of municipal and industrial sludge is enormous, and its harmless, reduced-volume, and resource-based treatment has become an urgent problem to be solved. Drying is a key step in the sludge treatment process, which can significantly reduce volume and weight, and create conditions for subsequent incineration, composting, or building material utilization.

[0003] The existing technology for sludge drying still has the following drawbacks: In existing technologies, commonly used sludge drying technologies mainly include hot air drying and indirect steam drying. Hot air drying equipment is simple, but it has disadvantages such as low thermal efficiency, high energy consumption, and long drying time. Moreover, a hard crust easily forms on the surface of the sludge during the drying process, hindering the escape of internal moisture and leading to uneven drying. Although indirect steam drying has higher thermal efficiency, it has a slow heat transfer rate, requires large equipment investment, and also suffers from the problem of easy scaling.

[0004] In existing technologies, microwave drying, as a novel drying technology, works by using microwaves to act on the molecules inside the material, generating a volumetric heat source effect that heats the material simultaneously from the inside out. It offers advantages such as rapid heating, selective heating, and ease of control. However, when microwave drying is used alone for sludge treatment, it also has significant drawbacks: energy is mainly consumed in water evaporation, but if the evaporated water is not removed in time, it will saturate the cavity, inhibiting subsequent water evaporation and leading to decreased efficiency. Furthermore, uneven microwave field distribution can easily cause localized overheating or arcing, posing safety hazards.

[0005] In existing technologies, the traditional microwave drying process involves pressing sludge into cakes and placing them on the surface of a conveyor belt. Adjacent cakes are spaced apart, and while the dried cakes are thinner, they retain their cake shape for easy separation and collection by operators. However, because the cakes are relatively thick, moisture in the lower layers doesn't easily evaporate. Therefore, the cakes need to be flipped during the drying process using a turning plate. Each flip causes the plate to contact the conveyor belt surface, generating mutual pressure. Prolonged operation can scratch the conveyor belt surface.

[0006] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a combined heating type sludge deep dewatering and drying device in order to achieve a more practical and valuable purpose. Summary of the Invention

[0007] This invention provides a combined heating type sludge deep dewatering and drying device to overcome the above-mentioned defects in the prior art.

[0008] The purpose and effectiveness of the combined heating type sludge deep dewatering and drying device of the present invention are achieved by the following specific technical means: A combined heating type sludge deep dewatering and drying device includes a drying chamber. Two insulation plates are symmetrically arranged inside the drying chamber. A cover plate is provided at the top of the drying chamber, and a microwave heater is provided on the upper side of the cover plate. A feed funnel is provided on the upper side of one end of the cover plate. The drying chamber contains a first heating chamber, a drying chamber, and a second heating chamber. A first conveying assembly and a second conveying assembly are provided at the upper part of the drying chamber, and a large circulating fan is provided at the lower part of the drying chamber. Several small circulating fans are provided in the middle of the second heating chamber. The first conveying assembly includes two rotating shafts. A ratchet is fitted on the outer wall of each end of the rotating shaft. A conveyor belt is connected to the outer wall of the two pairs of ratchets. The outer wall of the conveyor belt has several through holes. Several mounting plates and several V-shaped elastic elements are spaced apart on the outer wall of the conveyor belt. Several grooves are provided inside the mounting plates. A first V-shaped frame slides within the grooves. A lever is rotatably provided on the outer wall of each end of the first V-shaped frame. Several push plates slide on the upper part of the mounting plates.

[0009] Preferably, the two ends of the V-shaped elastic element are respectively connected to one end of the corresponding two push plates on the two adjacent mounting plates. A second V-shaped frame is provided on each side of the first V-shaped frame. A rubber element is provided at each end of the second V-shaped frame and connected to the mounting plate. A first heater is provided at the lower part of the first heating chamber and a second heater is provided at the upper part of the second heating chamber. The first conveying assembly is located above the second conveying assembly. The small circulating fan is located between the first conveying assembly and the second conveying assembly. The microwave heater is connected to the upper part of the drying chamber. The two ends of the rotating shaft are respectively rotatably connected to the two insulation plates. Two drive motors are installed on one side of one of the insulation plates. The two drive motors drive the first conveying assembly and the second conveying assembly to move respectively. The mounting plates are staggered with the V-shaped elastic elements. The ends of each pair of push plates that are close to each other are in sliding contact with the inclined surfaces of the outer walls of the two ends of the first V-shaped frame.

[0010] Preferably, a torsion spring is provided at the connection between the inclined lower end of the lever and the outer wall of one end of the first V-shaped frame. A spray hole is provided at each end of the first V-shaped frame, and the spray hole communicates with the interior of the first V-shaped frame. A sealing strip is provided at each end of the outer wall of the first V-shaped frame, and the sealing strip is in frictional contact with the side wall of the groove. Two pairs of limiting blocks are provided on the side walls of the drying chamber, and the two pairs of limiting blocks are respectively located above the sides of the first conveying assembly and the second conveying assembly. Two guide blocks are provided on the side walls of the drying chamber, and the two guide blocks are respectively located on the upper side of one end of the first conveying assembly and one end of the second conveying assembly. The V-shaped elastic element is breathable.

[0011] Preferably, the inner wall of the conveyor belt is provided with a plurality of sets of housings, each set of several housings corresponding to the same mounting plate. A slide rod is slidably provided inside the housing, and a piston plate is provided on the outer wall of the middle part of the slide rod. The piston plate slides inside the housing. One end of the slide rod is connected to the inner wall of the middle part of the first V-shaped frame. The housing is provided with a first air pressure chamber and a second air pressure chamber, and the first air pressure chamber is located above the second air pressure chamber.

[0012] Preferably, the upper part of the drying chamber is provided with two guide plates spaced apart, one side of the guide plate has an uneven structure, the upper side of the piston plate is connected to the upper side of the first air pressure chamber with a first spring, and the other end of the slide rod is in sliding contact with the uneven side of the guide plate.

[0013] Preferably, the first air pressure chamber is connected to the drying chamber by a first one-way valve, the first air pressure chamber is connected to the interior of the first V-shaped frame by a second one-way valve, the upper part of the mounting plate is provided with several pairs of sliding grooves, each pair of push plates is provided with a slider on the lower side, the slider slides in the sliding groove, and a second spring is provided between one side of the slider and one side of the sliding groove.

[0014] Preferably, the second air pressure chamber is connected to the drying chamber by a third one-way valve, the slide rod has a connecting channel in the middle, the first V-shaped frame has an S-shaped channel in the middle, the outer wall of the middle of the first V-shaped frame has several spray valves, one end of the connecting channel is connected to one end of the S-shaped channel, the other end of the connecting channel is connected to the second air pressure chamber by a fourth one-way valve, the other end of the S-shaped channel is connected to several of the spray valves, and the structure of the first conveying assembly is the same as the structure of the second conveying assembly.

[0015] Preferably, the lower part of the drying chamber is provided with a filter plate, the upper side of the filter plate is provided with a collection box, one end of the middle part of the drying chamber is provided with an outlet, and a sealing plate is installed in the outlet.

[0016] Preferably, a filter and a condenser are provided at one end of the exterior of the drying chamber, the filter is connected to the condenser, the filter is connected to the upper part of the drying chamber, the condenser is connected to the lower part of the first heating chamber, and the large circulating fan is connected to the lower part of the first heating chamber.

[0017] Preferably, the upper part of the second heating chamber is connected to the upper part of the drying chamber, the small circulating fan is connected to the middle part of the drying chamber, and a control box is provided on the outer side of the drying chamber.

[0018] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a combined heating type sludge deep dewatering and drying device. Through the arrangement of a first heater, a large circulating fan, a filter, and a condenser, the large circulating fan sprays dry hot air from the first heating chamber to the upper part of the drying chamber to heat and dry the sludge cake. A portion of the gas in the upper part of the drying chamber is transported to the filter for dust removal. The humid and hot air after dust removal is cooled and dehumidified by the condenser, becoming dry cold air. This dry cold air is transported to the first heating chamber, where the first heater heats the gas. The large circulating fan sprays the dry hot air from the first heating chamber to the upper part of the drying chamber, achieving a large-circulation hot air drying effect. Then, through the setting of a small circulating fan and a second heater, with the small circulating fan located between the first and second conveying components, another portion of the gas in the upper part of the drying chamber is conveyed to the second heating chamber. The second heater heats the gas in the second heating chamber, and the small circulating fan sprays the hot air from the second heating chamber to the middle of the drying chamber, increasing the drying speed of the sludge cake on the first and second conveying components. It also increases the humidity of the return air, facilitating dehumidification by the condenser and achieving the drying effect of the small circulating hot air. Finally, through the setting of a microwave heater, the microwave heater is activated to heat the sludge cake on the upper side of the first conveying component. Microwaves act on the molecules inside the sludge cake, generating a volumetric heat source effect, heating the sludge cake simultaneously from the inside out, resulting in a fast heating rate. Combined with the movement of hot air on the outside of the sludge cake, it can quickly remove evaporated moisture, improving the efficiency of heating and drying the sludge cake. The large and small circulating hot air, combined with microwave heating, circulate repeatedly, achieving deep drying of sludge, energy saving, and increased production capacity. The synergistic effect is that microwaves are responsible for internal heating, forcing moisture to migrate outwards; hot air is responsible for surface dehumidification, promptly removing moisture. The combination of the two technologies overcomes the shortcomings of a single technology, and the drying rate far exceeds that of drying by hot air or microwave alone.

[0019] This invention discloses a combined heating type sludge deep dewatering and drying device. Through the arrangement of a first V-shaped frame and V-shaped elastic elements, and because several of the first V-shaped frames and V-shaped elastic elements on the upper part of the first conveying assembly are inverted, the sludge cake is tilted and supported by the middle of these frames and elements. This reduces the contact area between the sludge cake and the upper part of the first conveying assembly, increases the contact area between the sludge cake and hot air, and improves the drying effect of the hot air. Furthermore, the large circulating fan sprays a large amount of hot air upwards. Due to the permeability of the V-shaped elastic elements, the hot air is allowed to spray upwards through the through holes and contact the lower side of the sludge cake, further increasing the contact area and promoting the drying effect. Finally, through the arrangement of the first V-shaped frame, push plates, and V-shaped elastic elements, the ends of each pair of push plates slide in contact with the inclined surfaces of the outer walls at both ends of the first V-shaped frame. The upward movement of the first V-shaped frame guides the two push plates, causing them to move away from each other. By using two pairs of push plates on adjacent mounting plates that are far apart from each other, the two ends of the V-shaped elastic element are squeezed. The two ends of the V-shaped elastic element are squeezed by the two corresponding push plates, causing the middle part of the V-shaped elastic element to move upward. This can turn the mud cake against the outer wall of the two ends of the V-shaped elastic element over or shake the mud cake, so as to break the hard shell formed on the surface of the mud cake during the drying process, so as to allow the moisture inside the mud cake to escape and improve the heating and drying effect of the mud cake.

[0020] This invention discloses a combined heating type sludge deep dewatering and drying device. Through the arrangement of a guide plate, a sliding rod, and a push plate, one end of the deflector plate disengages from the push plate. The sliding rod moves upward, driving the piston plate upward. The upward movement of the piston plate delivers gas from the first pressure chamber to the interior of the first V-shaped frame through a second one-way valve. The high-pressure gas in the first V-shaped frame is ejected through two nozzles, thereby driving the two deflectors plate to swing. The swinging of the two deflectors plate either flips the sludge cake or breaks the hard shell formed on the surface of the sludge cake, facilitating full contact between the sludge cake and the hot air and allowing moisture to escape from the inside of the sludge cake, further improving the heating and drying effect of the sludge cake. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the first isometric structure of the present invention; Figure 2 This is a schematic diagram of the second isometric structure of the present invention; Figure 3 This is a schematic diagram of the first isometric structure of the first conveying component in this invention; Figure 4 This is a schematic diagram of the second isometric structure of the first conveying component in this invention; Figure 5 This is a top view of the structure of the present invention; Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure at point AA; Figure 7 This is a front view structural diagram of the present invention; Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure at point BB; Figure 9 This is a top view of the first conveying component in this invention. Figure 10 for Figure 9 Schematic diagram of the cross-sectional structure at the CC section; Figure 11 for Figure 10 A magnified schematic diagram of the local structure at point E; Figure 12 for Figure 9 Schematic diagram of the cross-sectional structure at point DD.

[0024] Explanation of reference numerals in the attached figures: 10. Drying chamber body; 11. Cover plate; 12. Feed funnel; 13. Insulation plate; 14. Control box; 15. Filter; 16. Condenser; 17. Microwave heater; 18. First heating chamber; 19. Drying chamber; 20. Second heating chamber; 21. Large circulating fan; 22. Small circulating fan; 23. First heater; 24. First conveying assembly; 25. Second conveying assembly; 26. Rotating shaft; 27. Ratchet; 28. Conveyor belt; 29. ​​Through hole; 30. Limiting block; 31. Guide block; 32. Mounting plate; 33. Groove; 34. First V-shaped frame; 35. Push plate; 36. V-shaped elastic element; 37. Shell. 37. Slide rod; 38. Piston plate; 39. First spring; 40. Paddle plate; 41. Spray hole; 42. Sealing strip; 43. Torsion spring; 44. First one-way valve; 45. Second one-way valve; 46. Third one-way valve; 47. Guide plate; 48. Connecting channel; 49. First air pressure chamber; 50. Second air pressure chamber; 51. Fourth one-way valve; 52. S-shaped channel; 53. Spray valve; 54. Slider; 55. Second spring; 56. Slide groove; 57. Second V-shaped frame; 58. Rubber part; 59. Second heater; 60. Drive motor; 61. Collection box; 62. Outlet; 63. Sealing plate; 64. Filter plate; 65. Detailed Implementation

[0025] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0026] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] like Figure 1-12 As shown: This invention provides an embodiment of a combined heating type sludge deep dewatering and drying device. like Figure 1-12 As shown, the drying chamber includes a drying chamber 10. Two insulation boards 13 are symmetrically arranged inside the drying chamber 10. A cover plate 11 is provided at the upper end of the drying chamber 10. A microwave heater 17 is provided on the upper side of the cover plate 11. A feeding funnel 12 is provided on the upper side of one end of the cover plate 11. The drying chamber 10 is provided with a first heating chamber 18, a drying chamber 19, and a second heating chamber 20. A first conveying assembly 24 and a second conveying assembly 25 are provided at the upper part of the drying chamber 19. A large circulating fan 21 is provided at the lower part of the drying chamber 19. Several small circulating fans 22 are provided in the middle of the second heating chamber 20. The first conveying assembly 24 includes two rotating shafts 26. A ratchet 27 is fitted on the outer wall of each end of the rotating shaft 26. A conveyor belt 28 is connected to the outer wall of the two pairs of ratchet 27. A plurality of through holes 29 are provided on the outer wall of the conveyor belt 28. A plurality of mounting plates 32 and a plurality of V-shaped elastic elements 36 are spaced apart on the outer wall of the conveyor belt 28. A plurality of grooves 33 are provided inside the mounting plate 32. A first V-shaped frame 34 is slidably provided in the groove 33. A lever 41 is rotatably provided on the outer wall of each end of the first V-shaped frame 34. A plurality of push plates 35 are slidably provided on the upper part of the mounting plate 32.

[0029] In this application, the large circulating fan 21 sprays the dry hot air in the first heating chamber 18 to the upper part of the drying chamber 19 to heat and dry the mud cake. A portion of the gas in the upper part of the drying chamber 19 is sent to the filter 15 for filtration and dust removal. The humid and hot air after dust removal is cooled and dehumidified by the condenser 16. The dehumidified air becomes dry and cold air, which is sent to the first heating chamber 18. The first heater 23 heats the gas in the first heating chamber 18. The large circulating fan 21 sprays the dry hot air in the first heating chamber 18 to the upper part of the drying chamber 19 to achieve the large circulating hot air drying effect. Then, through the arrangement of the small circulating fan 22 and the second heater 60, with the small circulating fan 22 located between the first conveying assembly 24 and the second conveying assembly 25, another portion of the gas in the upper part of the drying chamber 19 is conveyed to the second heating chamber 20. The second heater 60 heats the gas in the second heating chamber 20, and the small circulating fan 22 sprays the hot gas in the second heating chamber 20 to the middle of the drying chamber 19, increasing the drying speed of the mud cake on the first conveying assembly 24 and the second conveying assembly 25, and also increasing the air humidity during return air, which facilitates dehumidification by the condenser 16, thus realizing the small circulating hot gas drying effect. Finally, through the arrangement of the microwave heater 17, the microwave heater 17 is activated to heat the mud cake on the upper side of the first conveying assembly 24. The microwaves act on the molecules inside the mud cake, generating a volumetric heat source effect, so that the mud cake is heated inside and out at the same time, resulting in a fast heating rate. Combined with the movement of hot gas on the outside of the mud cake, it can quickly remove the evaporated moisture, improving the efficiency of heating and drying the mud cake. The combination of large and small circulating hot air with microwave heating, in a continuous cycle, achieves deep drying of sludge, resulting in energy savings and increased production capacity. The synergistic effect involves microwaves heating the interior, forcing moisture to migrate outwards, while hot air dehumidifies the surface, promptly removing moisture. This combined approach overcomes the limitations of either single technology, achieving a drying rate far exceeding that of hot air or microwave drying alone.

[0030] Preferred, such as Figure 3-4 , Figure 6 , Figure 8 , Figure 10-12As shown, the two ends of the V-shaped elastic element 36 are respectively connected to one end of the corresponding two push plates 35 on the two adjacent mounting plates 32. A second V-shaped frame 58 is provided on both sides of the first V-shaped frame 34. A rubber element 59 is provided at both ends of the second V-shaped frame 58 and connected to the mounting plate 32. A first heater 23 is provided at the lower part of the first heating chamber 18, and a second heater 60 is provided at the upper part of the second heating chamber 20. The first conveying assembly 24 is located above the second conveying assembly 25. The small circulating fan 22 is located between the first conveying assembly 24 and the second conveying assembly 25. The microwave heater 17 is connected to the upper part of the drying chamber 19. The two ends of the rotating shaft 26 are respectively rotatably connected to two insulation plates 13. Two drive motors 61 are installed on one side of one of the insulation plates 13. The two drive motors 61 drive the first conveying assembly 24 and the second conveying assembly 25 to move respectively. Several mounting plates 32 are staggered with several V-shaped elastic elements 36. The ends of each pair of push plates 35 that are close to each other are in sliding contact with the inclined surfaces of the outer walls of the two ends of the first V-shaped frame 34.

[0031] Preferred, such as Figure 3 , Figure 6 , Figure 8 , Figure 10-12 As shown, a torsion spring 44 is provided at the connection between the inclined lower end of the lever 41 and the outer wall of one end of the first V-shaped frame 34. A spray hole 42 is provided at each end of the first V-shaped frame 34, and the spray hole 42 communicates with the interior of the first V-shaped frame 34. A sealing strip 43 is provided at each end of the outer wall of the first V-shaped frame 34, and the sealing strip 43 is in frictional contact with the side wall of the groove 33. Two pairs of limiting blocks 30 are provided on the two side walls of the drying chamber 19. The two pairs of limiting blocks 30 are located on the upper sides of the first conveying assembly 24 and the second conveying assembly 25, respectively. Two guide blocks 31 are provided on the two side walls of the drying chamber 19. The two guide blocks 31 are located on the upper side of one end of the first conveying assembly 24 and one end of the second conveying assembly 25, respectively. The V-shaped elastic element 36 is breathable.

[0032] Preferred, such as Figure 10-12 As shown, the inner wall of the conveyor belt 28 is provided with several sets of housings 37, each set of several housings 37 corresponding to the same mounting plate 32. A slide rod 38 is slidably provided inside the housing 37, and a piston plate 39 is provided on the outer wall of the middle part of the slide rod 38. The piston plate 39 slides inside the housing 37. One end of the slide rod 38 is connected to the inner wall of the middle part of the first V-shaped frame 34. The housing 37 is provided with a first air pressure chamber 50 and a second air pressure chamber 51. The first air pressure chamber 50 is located above the second air pressure chamber 51.

[0033] Preferred, such as Figure 6 , Figure 10-12As shown, two guide plates 48 are spaced apart on the upper part of the drying chamber 19. One side of the guide plate 48 has an uneven structure. The upper side of the piston plate 39 is connected to the upper side of the first air pressure chamber 50 by a first spring 40. The other end of the slide rod 38 slides in contact with the uneven side of the guide plate 48.

[0034] Preferred, such as Figure 10-12 As shown, the first air pressure chamber 50 is connected to the drying chamber 19 and is provided with a first one-way valve 45. The first air pressure chamber 50 is connected to the interior of the first V-shaped frame 34 and is provided with a second one-way valve 46. The upper part of the mounting plate 32 is provided with several pairs of sliding grooves 57. Each pair of push plates 35 is provided with a slider 55 on the lower side. The slider 55 slides in the sliding groove 57. A second spring 56 is connected between one side of the slider 55 and one side of the sliding groove 57.

[0035] Preferred, such as Figure 10-12 As shown, the second air pressure chamber 51 is connected to the drying chamber 19 and is equipped with a third one-way valve 47. The slide bar 38 has a connecting channel 49 in the middle. The first V-shaped frame 34 has an S-shaped channel 53 in the middle. The outer wall of the middle part of the first V-shaped frame 34 is equipped with several spray valves 54. One end of the connecting channel 49 is connected to one end of the S-shaped channel 53. The other end of the connecting channel 49 is connected to the second air pressure chamber 51 and is equipped with a fourth one-way valve 52. The other end of the S-shaped channel 53 is connected to several spray valves 54. The structure of the first conveying component 24 is the same as the structure of the second conveying component 25.

[0036] Preferred, such as Figure 6 As shown, a filter plate 65 is provided at the lower part of the drying chamber 19, a collection box 62 is slidably provided on the upper side of the filter plate 65, and an outlet 63 is provided at one end of the middle part of the drying chamber 19. A sealing plate 64 is installed in the outlet 63.

[0037] Preferred, such as Figure 1 , Figure 6-8 As shown, a filter 15 and a condenser 16 are provided at one end of the outside of the drying chamber 10. The filter 15 and the condenser 16 are connected. The filter 15 is connected to the upper part of the drying chamber 19. The condenser 16 is connected to the lower part of the first heating chamber 18. The large circulating fan 21 is connected to the lower part of the first heating chamber 18.

[0038] Preferred, such as Figure 1 , Figure 6-8 As shown, the upper part of the second heating chamber 20 is connected to the upper part of the drying chamber 19, the small circulating fan 22 is connected to the middle part of the drying chamber 19, and a control box 14 is provided on the outer side of the drying box 10.

[0039] Specific usage of this invention: Workers press the sludge into cakes, and several cakes are conveyed through the feed funnel 12 to the upper side of the first conveying assembly 24, with a certain distance between adjacent cakes. The guide block 31 guides the cakes at an angle, moving them to the upper side of the first conveying assembly 24. Two limiting blocks 30 limit the cakes, ensuring they are all positioned in the upper middle of the first V-shaped frame 34, preventing them from moving between the first conveying assembly 24 and the side wall of the drying chamber 19, thus avoiding jamming of the first conveying assembly 24.

[0040] The control system activates the first conveying assembly 24, which drives several mud cakes to move. Simultaneously, the large circulating fan 21 blows dry, hot air from the first heating chamber 18 upwards towards the upper part of the drying chamber 19. A portion of the gas in the upper part of the drying chamber 19 is sent to the filter 15 for filtration and dust removal. The humid, hot air after dust removal is cooled and dehumidified by the condenser 16, becoming dry, cold air. This dry, cold air is then sent to the first heating chamber 18, where the first heater 23 heats the gas. The large circulating fan 21 then sprays the dry, hot air from the first heating chamber 18 towards the upper part of the drying chamber 19, achieving the large-circulation hot air drying effect. Furthermore, the small circulating fan 22 is located between the first conveying assembly 24 and the second conveying assembly 25. Another part of the gas in the upper part of the drying chamber 19 is conveyed to the second heating chamber 20. The second heater 60 heats the gas in the second heating chamber 20. The small circulating fan 22 sprays the hot gas in the second heating chamber 20 to the middle of the drying chamber 19, increasing the drying speed of the mud cake on the first conveying assembly 24 and the second conveying assembly 25. At the same time, it also increases the air humidity during return air, which facilitates dehumidification by the condenser 16 and realizes the drying effect of small circulating hot gas.

[0041] Simultaneously, the microwave heater 17 activates to heat the sludge cake on the upper side of the first conveying component 24. Microwaves act on the molecules within the sludge cake, generating a volumetric heat source effect, heating the sludge cake both internally and externally simultaneously, resulting in a rapid heating rate. Combined with the movement of hot air around the sludge cake, this quickly removes evaporated moisture, improving the efficiency of heating and drying. The large and small circulation hot air cycles in conjunction with microwave heating, repeatedly circulating to achieve deep sludge drying, saving energy and increasing production capacity. The synergistic effect of microwaves—responsible for internal heating, forcing moisture to migrate outwards, and hot air for surface dehumidification, promptly removing moisture—overcomes the shortcomings of single technologies, achieving a drying rate far exceeding that of hot air or microwave drying alone. Furthermore, microwaves have excellent sterilization properties, simultaneously killing pathogens and parasite eggs in the sludge during the drying process, improving the product's hygienic properties.

[0042] Since the first V-shaped frames 34 and V-shaped elastic elements 36 on the upper part of the first conveying assembly 24 are all inverted, the mud cake is tilted and supported by the middle of the first V-shaped frames 34 and V-shaped elastic elements 36. This reduces the contact area between the mud cake and the upper part of the first conveying assembly 24, and increases the contact area between the mud cake and the hot air, which is beneficial to improving the drying effect of the mud cake by the hot air. In addition, the large circulating fan 21 sprays a large amount of hot air upward. Since the V-shaped elastic elements 36 are breathable, the hot air can be sprayed upward from the through holes 29 and contact the lower side of the mud cake, which can increase the contact area between the mud cake and the hot air, which is beneficial to promoting the drying effect of the mud cake.

[0043] The first conveying assembly 24 is started, and the drive motor 61 drives one of the rotating shafts 26 to rotate. The rotation of the rotating shaft 26 drives two ratchet wheels 27 to rotate. The rotation of the two ratchet wheels 27 drives the conveyor belt 28 to move. The movement of the conveyor belt 28 drives another pair of ratchet wheels 27 and another rotating shaft 26 to rotate, thereby making the conveyor belt 28 move smoothly.

[0044] The movement of the conveyor belt 28 drives the movement of several slide rods 38. When the lower end of the slide rod 38 contacts the protrusion of the guide plate 48, the lower end of the slide rod 38 is guided by the protrusion of the guide plate 48, pushing the slide rod 38 upward. The upward movement of the slide rod 38 drives the first V-shaped frame 34 upward, and the upward movement of the first V-shaped frame 34 drives the mud cake against the outer walls at both ends of the first V-shaped frame 34 upward, reducing the contact area between the mud cake and the push plate 35, which is beneficial for turning the mud cake over.

[0045] At this time, one end of the lever 41 disengages from the push plate 35, and the slide rod 38 moves upward, causing the piston plate 39 to move upward. The upward movement of the piston plate 39 delivers the gas in the first pressure chamber 50 to the interior of the first V-shaped frame 34 through the second one-way valve 46. The high-pressure gas in the first V-shaped frame 34 is ejected through the two nozzles 42, thereby pushing the two levers 41 to swing. The swinging of the two levers 41 is used to turn the mud cake over or to break the hard shell formed on the surface of the mud cake, so that the mud cake can fully contact the hot air and allow the moisture inside the mud cake to escape, further improving the heating and drying effect of the mud cake. Among them, the upward movement of the piston plate 39 delivers the hot air in the drying chamber 19 to the second pressure chamber 51 through the third one-way valve 47. The upward movement of the piston plate 39 compresses the first spring 40, generating elastic force.

[0046] Simultaneously, since the ends of each pair of push plates 35 that are close to each other slide in contact with the inclined surfaces of the outer walls at both ends of the first V-shaped frame 34, the movement of the first V-shaped frame 34 guides the two push plates 35, causing them to move away from each other. By utilizing the fact that the corresponding pairs of push plates 35 on the adjacent mounting plates 32 are all moving away from each other, the two ends of the V-shaped elastic member 36 are squeezed. The two ends of the V-shaped elastic member 36 are squeezed by the corresponding two push plates 35, causing the middle part of the V-shaped elastic member 36 to move upwards. This allows the mud cake resting against the outer walls at both ends of the V-shaped elastic member 36 to be flipped over or shaken, facilitating the breaking of the hard shell formed on the surface of the mud cake during the drying process, allowing the moisture inside the mud cake to escape, and improving the heating and drying effect of the mud cake. The moving away of the two push plates 35 causes the two sliders 55 to move away from each other, and the moving away of the two sliders 55 compresses the two second springs 56, generating elastic force.

[0047] When the lower end of the slide rod 38 contacts the recess of the guide plate 48, the slide rod 38 and the first V-shaped frame 34 can move downwards and reset under the elastic force of the first spring 40. The downward movement of the slide rod 38 drives the piston plate 39 to move downwards. The downward movement of the piston plate 39 uses the first one-way valve 45 to absorb the hot air in the drying chamber 19 into the first pressure chamber 50, which helps to compress the gas in the first pressure chamber 50 to generate high-pressure gas, thereby using the high-pressure gas to drive the lever 41 to swing. The lever 41 swings and resets under the elastic force of the torsion spring 44, so that the push plate 35 can move and reset under the elastic force of the second spring 56. Under the elastic force of the second spring 56, one end of the push plate 35 contacts the outer wall of the first V-shaped frame 34.

[0048] The downward movement of the slide bar 38 causes the piston plate 39 to move downward. The downward movement of the piston plate 39 delivers the hot air from the second pressure chamber 51 through the fourth one-way valve 52 and connecting channel 49 to the S-shaped channel 53. The hot air in the S-shaped channel 53 heats the first V-shaped frame 34, and the heat conduction of the first V-shaped frame 34 heats and dries the mud cake. Furthermore, the hot air in the S-shaped channel 53 is ejected through several spray valves 54 to facilitate close-range hot air drying of the mud cake.

[0049] Therefore, under the guidance of the guide plate 48 and the elastic force of the first spring 40, the first V-shaped frame 34 and the slide rod 38 can move up and down repeatedly. The up and down movement of the first V-shaped frame 34 drives the second V-shaped frame 58 to move up and down. The up and down movement of the second V-shaped frame 58, in conjunction with the two rubber parts 59, shakes the mud cake, so as to break the hard shell formed on the surface of the mud cake during the drying process, so as to allow the moisture inside the mud cake to escape and improve the heating and drying effect of the mud cake.

[0050] After drying for a certain period of time, several mud cakes move and fall to the upper side of the second conveying component 25. The second conveying component 25 drives the mud cakes to move into the collection box 62, so that the staff can take the collection box 62 out from the outlet 63 and discharge the dried sludge from the drying chamber 10.

[0051] The present invention discloses a combined heating type sludge deep dewatering and drying device. Through the arrangement of a first heater 23, a large circulating fan 21, a filter 15, and a condenser 16, the large circulating fan 21 sprays dry hot air from the first heating chamber 18 to the upper part of the drying chamber 19 to heat and dry the sludge cake. A portion of the gas in the upper part of the drying chamber 19 is transported to the filter 15 for filtration and dust removal. The humid and hot air after dust removal is cooled and dehumidified by the condenser 16, becoming dry and cold air. This dry and cold air is transported to the first heating chamber 18, where the first heater 23 heats the gas. The large circulating fan 21 sprays the dry hot air from the first heating chamber 18 to the upper part of the drying chamber 19, achieving a large-circulation hot air drying effect. Then, through the arrangement of the small circulating fan 22 and the second heater 60, with the small circulating fan 22 located between the first conveying assembly 24 and the second conveying assembly 25, another portion of the gas in the upper part of the drying chamber 19 is conveyed to the second heating chamber 20. The second heater 60 heats the gas in the second heating chamber 20, and the small circulating fan 22 sprays the hot gas in the second heating chamber 20 to the middle of the drying chamber 19, increasing the drying speed of the mud cake on the first conveying assembly 24 and the second conveying assembly 25, and also increasing the air humidity during return air, which facilitates dehumidification by the condenser 16, thus realizing the small circulating hot gas drying effect. Finally, through the arrangement of the microwave heater 17, the microwave heater 17 is activated to heat the mud cake on the upper side of the first conveying assembly 24. The microwaves act on the molecules inside the mud cake, generating a volumetric heat source effect, so that the mud cake is heated inside and out at the same time, resulting in a fast heating rate. Combined with the movement of hot gas on the outside of the mud cake, it can quickly remove the evaporated moisture, improving the efficiency of heating and drying the mud cake. The combination of large and small circulating hot air with microwave heating, in a continuous cycle, achieves deep drying of sludge, resulting in energy savings and increased production capacity. The synergistic effect involves microwaves heating the interior, forcing moisture to migrate outwards, while hot air dehumidifies the surface, promptly removing moisture. This combined approach overcomes the limitations of either single technology, achieving a drying rate far exceeding that of hot air or microwave drying alone.

[0052] This invention discloses a combined heating type sludge deep dewatering and drying device. Through the arrangement of a first V-shaped frame 34 and a V-shaped elastic element 36, and because several of the first V-shaped frames 34 and V-shaped elastic elements 36 on the upper part of the first conveying assembly 24 are inverted, the sludge cake is tilted and supported by the middle of these frames and elements. This reduces the contact area between the sludge cake and the upper part of the first conveying assembly 24, increases the contact area between the sludge cake and the hot air, and improves the drying effect of the hot air. Furthermore, the large circulating fan 21 sprays a large amount of hot air upwards. Because the V-shaped elastic element 36 is permeable, the hot air can be sprayed upwards from the through-hole 29 and contact the lower side of the sludge cake, further increasing the contact area between the sludge cake and the hot air, which is beneficial for promoting the drying effect of the sludge cake. Furthermore, through the arrangement of the first V-shaped frame 34, push plates 35, and V-shaped elastic elements 36, since the ends of each pair of push plates 35 that are close to each other slide in contact with the inclined surfaces of the outer walls at both ends of the first V-shaped frame 34, the movement of the first V-shaped frame 34 guides the two push plates 35, causing them to move away from each other. By utilizing the fact that the corresponding pairs of push plates 35 on the adjacent mounting plates 32 are all moving away from each other, the two ends of the V-shaped elastic element 36 are squeezed. The two ends of the V-shaped elastic element 36 are squeezed by the corresponding two push plates 35, causing the middle part of the V-shaped elastic element 36 to move upwards. This allows the mud cake resting against the outer walls at both ends of the V-shaped elastic element 36 to be flipped over or shaken, facilitating the breaking of the hard shell formed on the surface of the mud cake during the drying process, allowing the moisture inside the mud cake to escape, and improving the heating and drying effect of the mud cake.

[0053] This invention discloses a combined heating type sludge deep dewatering and drying device. Through the arrangement of a guide plate 48, a sliding rod 38, and a push plate 35, one end of the lever 41 disengages from the push plate 35. The sliding rod 38 moves upward, driving the piston plate 39 upward. The upward movement of the piston plate 39 delivers gas from the first pressure chamber 50 to the interior of the first V-shaped frame 34 through the second one-way valve 46. The high-pressure gas in the first V-shaped frame 34 is ejected through two nozzles 42, thereby driving the two levers 41 to swing. The swinging of the two levers 41 flips the sludge cake or breaks the hard shell formed on the surface of the sludge cake, facilitating full contact between the sludge cake and the hot air and allowing moisture to escape from the sludge cake, further improving the heating and drying effect of the sludge cake.

[0054] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A combined heating type sludge deep dewatering and drying device, characterized in that: The equipment includes a drying chamber (10), which has two symmetrical insulation boards (13) inside. The upper end of the drying chamber (10) is provided with a cover plate (11), and the upper side of the cover plate (11) is provided with a microwave heater (17). One end of the cover plate (11) is provided with a feeding funnel (12). The drying chamber (10) has a first heating chamber (18), a drying chamber (19), and a second heating chamber (20) inside. The upper part of the drying chamber (19) is provided with a first conveying assembly (24) and a second conveying assembly (25). The lower part of the drying chamber (19) is provided with a large circulating fan (21), and the middle part of the second heating chamber (20) is provided with several small circulating fans (22). The first conveying assembly (24) includes two rotating shafts (26). Each of the two ends of the rotating shaft (26) is fitted with a ratchet (27). The outer walls of the two pairs of ratchets (27) are connected to a conveyor belt (28). The outer wall of the conveyor belt (28) is provided with several through holes (29). The outer wall of the conveyor belt (28) is provided with several mounting plates (32) and several V-shaped elastic elements (36) at intervals. The interior of the mounting plate (32) is provided with several grooves (33). A first V-shaped frame (34) is slidably provided in the groove (33). Each of the two ends of the outer wall of the first V-shaped frame (34) is rotatably provided with a lever (41). The upper part of the mounting plate (32) is slidably provided with several pairs of push plates (35).

2. The combined heating type sludge deep dewatering and drying device according to claim 1, characterized in that: The two ends of the V-shaped elastic element (36) are respectively connected to one end of the corresponding two push plates (35) on the two adjacent mounting plates (32). A second V-shaped frame (58) is provided on both sides of the first V-shaped frame (34). A rubber element (59) is connected to the mounting plate (32) at both ends of the second V-shaped frame (58). A first heater (23) is provided at the lower part of the first heating chamber (18). A second heater (60) is provided at the upper part of the second heating chamber (20). The microwave heater (17) is connected to the upper part of the drying chamber (19). Two drive motors (61) are installed on one side of one of the heat preservation plates (13). The two drive motors (61) drive the first conveying component (24) and the second conveying component (25) to move respectively. A plurality of mounting plates (32) are staggered with a plurality of V-shaped elastic elements (36). The ends of each pair of push plates (35) that are close to each other slide in contact with the inclined surfaces of the outer walls of the two ends of the first V-shaped frame (34).

3. The combined heating type sludge deep dewatering and drying device according to claim 2, characterized in that: A torsion spring (44) is provided at the connection between the inclined lower end of the dial plate (41) and the outer wall of one end of the first V-shaped frame (34). A spray hole (42) is provided at each end of the first V-shaped frame (34). The spray hole (42) communicates with the interior of the first V-shaped frame (34). A sealing strip (43) is provided at each end of the outer wall of the first V-shaped frame (34). The sealing strip (43) rubs against the side wall of the groove (33). Two pairs of limiting blocks (30) are provided on the two side walls of the drying chamber (19). The two pairs of limiting blocks (30) are located above the sides of the first conveying assembly (24) and the second conveying assembly (25). Two guide blocks (31) are provided on the two side walls of the drying chamber (19). The two guide blocks (31) are located on the upper side of one end of the first conveying assembly (24) and one end of the second conveying assembly (25). The V-shaped elastic element (36) is breathable.

4. The combined heating type sludge deep dewatering and drying device according to claim 3, characterized in that: The inner wall of the conveyor belt (28) is provided with several sets of housings (37), each set of several housings (37) corresponds to the same mounting plate (32). A slide rod (38) is slidably provided inside the housing (37). A piston plate (39) is provided on the outer wall of the middle part of the slide rod (38). The piston plate (39) slides inside the housing (37). One end of the slide rod (38) is connected to the inner wall of the middle part of the first V-shaped frame (34). The housing (37) is provided with a first air pressure chamber (50) and a second air pressure chamber (51). The first air pressure chamber (50) is located above the second air pressure chamber (51).

5. The combined heating type sludge deep dewatering and drying device according to claim 4, characterized in that: The upper part of the drying chamber (19) is provided with two guide plates (48) spaced apart. One side of the guide plate (48) has an uneven structure. The upper side of the piston plate (39) is connected to the upper side of the first air pressure chamber (50) and a first spring (40) is provided. The other end of the slide rod (38) slides in contact with the uneven side of the guide plate (48).

6. The combined heating type sludge deep dewatering and drying device according to claim 4, characterized in that: The first air pressure chamber (50) is connected to the drying chamber (19) by a first one-way valve (45), and the first air pressure chamber (50) is connected to the interior of the first V-shaped frame (34) by a second one-way valve (46). The upper part of the mounting plate (32) is provided with several pairs of sliding grooves (57), and each pair of push plates (35) is provided with a slider (55) on the lower side. The slider (55) slides in the sliding groove (57), and a second spring (56) is connected between one side of the slider (55) and one side of the sliding groove (57).

7. The combined heating type sludge deep dewatering and drying device according to claim 4, characterized in that: The second air pressure chamber (51) is connected to the drying chamber (19) and is provided with a third one-way valve (47). The slide rod (38) is provided with a connecting channel (49) in the middle. The first V-shaped frame (34) is provided with an S-shaped channel (53) in the middle. The outer wall of the middle part of the first V-shaped frame (34) is provided with several spray valves (54). One end of the connecting channel (49) is connected to one end of the S-shaped channel (53). The other end of the connecting channel (49) is connected to the second air pressure chamber (51) and is provided with a fourth one-way valve (52). The other end of the S-shaped channel (53) is connected to several of the spray valves (54). The structure of the first conveying component (24) is the same as the structure of the second conveying component (25).

8. The combined heating type sludge deep dewatering and drying device according to claim 1, characterized in that: The lower part of the drying chamber (19) is provided with a filter plate (65), and a collection box (62) is slidably provided on the upper side of the filter plate (65). The middle end of the drying chamber (19) is provided with an outlet (63), and a sealing plate (64) is installed in the outlet (63).

9. A combined heating type sludge deep dewatering and drying device according to claim 2, characterized in that: The drying chamber (10) has a filter (15) and a condenser (16) at one end of its exterior. The filter (15) is connected to the condenser (16). The filter (15) is connected to the upper part of the drying chamber (19). The condenser (16) is connected to the lower part of the first heating chamber (18). The large circulating fan (21) is connected to the lower part of the first heating chamber (18).

10. A combined heating type sludge deep dewatering and drying device according to claim 2, characterized in that: The upper part of the second heating chamber (20) is connected to the upper part of the drying chamber (19), the small circulating fan (22) is connected to the middle part of the drying chamber (19), and a control box (14) is provided on the outer side of the drying box (10).

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