A heat recovery cascade drying tower

Abstract

The present invention discloses a heat recovery cascade drying tower, specifically relating to the technical field of drying towers, which includes a tower shell, a displacement electric cylinder, and a honeycomb internal and external displacement heat exchange mechanism; wherein the honeycomb internal and external displacement heat exchange mechanism includes a connecting strip, a rack, two gears, a displacement rotating shaft, an L-shaped strip, honeycomb heat exchange fins, a honeycomb inner column, a diversion frame, and a plurality of honeycomb outer holes. Through the honeycomb internal and external displacement heat exchange mechanism, the present invention has the advantages that the material can realize multi-faceted displacement heat exchange contact drying inside the honeycomb and the material can realize multi-faceted displacement heat exchange contact outside the honeycomb, with a wider displacement heat exchange contact area and better heat exchange and drying effects of the heat recovery cascade drying tower, thus solving the problems that it is difficult to realize displacement contact drying of the outer-layer honeycomb and it is difficult to synchronously realize displacement contact drying of the inner-layer honeycomb during the heat exchange process, resulting in a smaller drying displacement contact area and a poor drying effect of the heat recovery cascade drying tower.

Description

Technical Field

[0001] The present invention relates to the technical field of drying towers, and more particularly to a heat recovery cascade drying tower. Background Art

[0002] Heat recovery cascade drying tower is a kind of high-efficiency drying equipment, which is mainly used to dry materials. The heat recovery cascade drying tower adopts heat energy transfer method to transfer heat energy to the surface of the material through the heat medium, so that the moisture is evaporated to achieve the drying effect.

[0003] Among the existing published technical literature, Chinese Patent Publication No. CN106643024A discloses a drying tower that includes a conical mesh material tray within the tower body above a widened portion. During use, a cylinder piston pushes the material tray downward, positioning the bottom of the tray within the widened portion. Hot air passes through the mesh and reaches the top of the tray, pre-drying the material above it. The material then slides through the gap between the tray and the widened portion for formal drying, further improving drying efficiency. However, this patent has the following drawbacks:

[0004] When the heat recovery cascade drying tower is used for drying, the material will enter the tower body and be filled with heated air so that the air and the material will come into contact to realize the drying operation. The steam after drying will be discharged upward to recover the heat and realize the energy saving function. However, during the drying process, the material will directly come into contact with the inside of the drying tower for heat exchange. During the heat exchange process, it is difficult to realize the outer honeycomb displacement contact drying and the inner honeycomb displacement contact drying simultaneously, resulting in a small drying displacement contact area and a poor drying effect of the heat recovery cascade drying tower. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides the following technical solutions: a heat recovery cascade drying tower, comprising a tower shell and a shifting electric cylinder, the shifting electric cylinder being fixed at the top of the tower shell, and the pushing end of the shifting electric cylinder being provided with a honeycomb internal and external shifting heat exchange mechanism; the honeycomb internal and external shifting heat exchange mechanism comprises a connecting bar fixedly installed at the pushing end of the shifting electric cylinder, both ends of the connecting bar are fixedly connected with racks, and one side of each of the racks is meshed and connected with two gears; the inner wall of the gear is fixedly connected with a shifting shaft, and the shifting shaft is rotatably connected to the tower shell, an outer wall side of the shifting shaft is fixedly connected with an L-shaped bar, and a honeycomb heat exchange plate is fixedly installed at the bottom end of the L-shaped bar, and a honeycomb inner column is rotatably installed inside the honeycomb heat exchange plate, and a guide frame is fixedly connected with one side of the inner wall of the tower shell, and a plurality of honeycomb outer holes are opened inside the guide frame.

[0006] Preferably, the two racks are symmetrically arranged with respect to the connecting bar, and the cross-sectional shape of the rack is L-shaped. There is a gap between the outer wall of the honeycomb inner column and the inner wall of the honeycomb heat exchange fin, and the inner wall of the diversion frame is a smooth surface. A guiding block is fixedly installed at the top of the diversion frame; an angle sensor is installed at the top of one of the displacement rotating shafts, the sensing end of the angle sensor is fixedly connected to the displacement rotating shaft, and a support bar is fixedly connected to one side of the outer wall of the angle sensor; the support bar is fixedly installed between the tower shell. A fixing frame is fixedly installed on one side of the tower shell, and a discharge hopper is fixedly communicated at the bottom end of the tower shell, and the fixing frame is used to support the tower shell. A plurality of honeycomb heat exchange rings are fixedly connected to the outer wall of the honeycomb heat exchange fin, and the honeycomb heat exchange rings are rotatably connected to the diversion frame.

[0007] One side of the displacement electric cylinder is provided with a feed pipe, and one side of the feed pipe is provided with a heat recovery pipe; both the feed pipe and the heat recovery pipe are fixedly communicated with the tower shell; the bottom end of the honeycomb inner column is fixedly connected with a support frame, and the support frame is fixedly connected with the diversion frame, and the honeycomb heat exchange fin is rotatably connected with the support frame.

[0008] When the present technology is in use, the displacement electric cylinder pushes the connecting bar to move leftward, and the connecting bar drives the rack to move leftward and then move rightward. The gear drives the displacement rotating shaft to rotate reciprocally, the L-shaped bar drives the honeycomb heat exchange fin to rotate reciprocally, and a plurality of honeycomb heat exchange rings are in inclined rotational contact with the material. Moreover, the inner wall of the honeycomb heat exchange fin can rotate reciprocally outside the honeycomb inner column, so that the material in the honeycomb voids outside the honeycomb heat exchange fin can achieve reciprocating displacement contact, and the material in the honeycomb voids inside the honeycomb heat exchange fin can achieve reciprocating displacement contact. The material can achieve multi-faceted displacement heat exchange contact drying inside the honeycomb and multi-faceted displacement heat exchange contact outside the honeycomb.

[0009] Preferably, a main heat supply pipe is fixedly communicated with one side of the inner wall of the diversion frame and at a position below the diversion frame, and a flow splitting heat exchange assembly is arranged below the main heat supply pipe; the flow splitting heat exchange assembly includes a flow splitting cone fixedly arranged below the main heat supply pipe, the bottom end of the flow splitting cone is fixedly connected with a support column, and a plurality of diversion sleeve plates are fixedly installed on the outer wall of the support column, and all the diversion sleeve plates are fixedly connected with the tower shell; a connecting pipe is fixedly communicated with one side of the outer wall of the main heat supply pipe, and an auxiliary heat supply pipe is fixedly communicated at the top end of the connecting pipe;

[0010] The shunt heat exchange component further includes a drying box, a resistance heating plate, a controller, and a blower; the drying box is fixedly communicated with the bottom end of the main heat supply pipe, the resistance heating plate is fixed to the bottom end of the drying box, the controller is fixed to one side of the resistance heating plate, and the blower is fixedly communicated with one side of the drying box. The outer wall of the flow dividing cone is a smooth surface, and the support columns are used to support the diversion sleeve plate. The auxiliary heat supply pipe is fixedly connected to the tower shell and is communicated with the tower shell, and the inner walls of the auxiliary heat supply pipe and the connecting pipe are both smooth surfaces.

[0011] When this technology is in use, the controller starts the blower, and the blower causes the externally pressurized wind to enter the drying box. The heated air is pressurized and conveyed into the main heat supply pipe, and is sprayed onto the flow dividing cone by the main heat supply pipe. The main heat supply pipe conveys another part of the hot air into the connecting pipe. More heated air is conveyed through the multiple honeycomb outer holes inside the diversion frame. The dried material is diverted along the flow dividing cone onto multiple diversion sleeve plates and then discharged downward into the discharge hopper along the diversion sleeve plates.

[0012] The technical effects and advantages of the present invention:

[0013] 1. Through the honeycomb internal and external displacement heat exchange mechanism of the present invention, the displacement electric cylinder pushes the connecting bar to move leftward. After the connecting bar drives the rack to move leftward and then move rightward, the rack drives the gear to rotate reciprocally. The honeycomb heat exchange sheet drives multiple honeycomb heat exchange rings to rotate reciprocally inside the honeycomb outer holes. The materials in the honeycomb voids outside the honeycomb heat exchange sheet can achieve reciprocating displacement, and the materials in the honeycomb voids inside the honeycomb heat exchange sheet can also achieve reciprocating displacement. At the same time, the steam heat energy will be recovered through the heat recovery pipe. The materials can achieve internal honeycomb multi-faceted displacement heat exchange contact drying, and the materials can also achieve external honeycomb multi-faceted displacement heat exchange contact. The displacement heat exchange contact area is wider, and the heat exchange and drying effect of the heat recovery cascade drying tower is better.

[0014] 2. The present invention utilizes the shunt heat exchange component. The hot air is sprayed onto the flow dividing cone by the main heat supply pipe. The flow dividing cone diverts the hot air for upward discharge. The main heat supply pipe conveys the hot air into the connecting pipe and then into the auxiliary heat supply pipe through the connecting pipe. There is more heated air in the multiple honeycomb outer holes inside the diversion frame. The dried material is diverted along the flow dividing cone onto multiple diversion sleeve plates. In this way, honeycomb diversion heat supply drying can be achieved, and the heat exchange and drying effect of the drying tower is better. Brief Description of the Drawings

[0015] Figure 1 It is the front view structural schematic diagram of the heat recovery cascade drying tower of the present invention.

[0016] Figure 2 It is the cross-sectional structural schematic diagram of the heat recovery cascade drying tower of the present invention.

[0017] Figure 3Schematic diagram of the truncated partial cross-section at the connection between the feed pipe and the tower shell of the present invention.

[0018] Figure 4 Schematic diagram of the vertical cross-section structure of the heat recovery cascade drying tower of the present invention.

[0019] Figure 5 Schematic diagram of the truncated partial vertical cross-section at the connection between the guide block and the diversion frame of the present invention.

[0020] Figure 6 Schematic diagram of the partial vertical cross-section view from below at the connection between the tower shell and the diversion frame of the present invention.

[0021] Figure 7 Schematic diagram of the truncated partial vertical cross-section at the connection between the honeycomb outer holes and the honeycomb heat exchange ring of the present invention.

[0022] Figure 8 Schematic diagram of the partial vertical cross-section at the connection between the honeycomb inner column and the support frame of the present invention.

[0023] Figure 9 Schematic diagram of the partial vertical cross-section view from below of the flow splitting heat exchange assembly of the present invention.

[0024] Reference numerals are: 1, tower shell; 2, displacement electric cylinder; 3, connecting bar; 4, rack; 5, gear; 6, displacement rotating shaft; 7, L-shaped bar; 8, honeycomb heat exchange fin; 9, honeycomb inner column; 10, diversion frame; 11, honeycomb outer hole; 12, guide block; 13, angle sensor; 14, support bar; 15, fixing frame; 16, discharge hopper; 17, honeycomb heat exchange ring; 18, support frame; 19, main heating pipe; 20, flow splitting cone; 21, support column; 22, diversion sleeve plate; 23, auxiliary heating pipe; 24, connecting pipe; 25, drying box; 26, resistance heating plate; 27, controller; 28, fan; 29, feed pipe; 30, heat recovery pipe. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] As shown in the attached Figure 1 - attached Figure 9A heat recovery cascade drying tower as shown, on which a honeycomb internal and external displacement heat exchange mechanism is provided. The setting of the honeycomb internal and external displacement heat exchange mechanism enables the material to achieve internal honeycomb multi-faceted displacement heat exchange contact drying, and the material can achieve external honeycomb multi-faceted displacement heat exchange contact. The displacement heat exchange contact area is wider, and the heat exchange and drying effect of the heat recovery cascade drying tower is better. The specific structure of the honeycomb internal and external displacement heat exchange mechanism is set as follows.

[0027] In this technical solution, as shown in the attached Figure 1 -attached Figure 8 figure, it includes a tower shell 1 and a displacement electric cylinder 2. The displacement electric cylinder 2 is fixed at the top of the tower shell 1, and the pushing end of the displacement electric cylinder 2 is provided with a honeycomb internal and external displacement heat exchange mechanism; the honeycomb internal and external displacement heat exchange mechanism includes a connecting strip 3 fixedly installed at the pushing end of the displacement electric cylinder 2. Both ends of the connecting strip 3 are fixedly connected with racks 4, and two gears 5 are meshed and driven on one side of each rack 4.

[0028] The inner wall of the gear 5 is fixedly connected with a displacement rotating shaft 6. The displacement rotating shaft 6 is rotatably connected with the tower shell 1. One side of the outer wall of the displacement rotating shaft 6 is fixedly connected with an L-shaped strip 7. At the bottom end of the L-shaped strip 7, a honeycomb heat exchange fin 8 is fixedly installed. A honeycomb inner column 9 is rotatably installed inside the honeycomb heat exchange fin 8. One side of the inner wall of the tower shell 1 is fixedly connected with a diversion frame 10, and a plurality of honeycomb outer holes 11 are opened inside the diversion frame 10. The two racks 4 are symmetrically arranged with respect to the connecting strip 3, and the cross-sectional shape of the rack 4 is L-shaped. There is a gap between the outer wall of the honeycomb inner column 9 and the inner wall of the honeycomb heat exchange fin 8, and the inner wall of the diversion frame 10 is a smooth surface.

[0029] In this technical solution, as shown in the attached Figure 1 -attached Figure 5 figure, a guide block 12 is fixedly installed at the top of the diversion frame 10 to facilitate diverting the material into the external honeycomb gaps formed between a plurality of honeycomb outer holes 11 and the honeycomb heat exchange fin 8 through the guide block 12. An angle sensor 13 is installed at the top of one of the displacement rotating shafts 6. The sensing end of the angle sensor 13 is fixedly connected with the displacement rotating shaft 6. One side of the outer wall of the angle sensor 13 is fixedly connected with a support bar 14; the support bar 14 is fixedly installed between the support bar 14 and the tower shell 1 to support the angle sensor 13 through the support bar 14. The angle sensor 13 performs angle sensing on the displacement rotating shaft 6, and the rotation angle of the displacement rotating shaft 6 sensed is within a forty-five-degree range to achieve a reciprocating rotation function. A fixed frame 15 is fixedly installed on one side of the tower shell 1, and a discharge hopper 16 is fixedly communicated at the bottom end of the tower shell 1. The fixed frame 15 is used to support the tower shell 1 to support the tower shell 1 from the side through the fixed frame 15, increase the stability of the tower shell 1, and prevent the tower shell 1 from shaking, while the discharge hopper 16 performs the function of discharging materials downward.

[0030] In this technical solution, as shown in the attached Figure 3 -attachedFigure 8 As shown, a plurality of honeycomb heat exchange rings 17 are fixedly connected to the outer wall of the honeycomb heat exchange sheet 8. The honeycomb heat exchange rings 17 are rotatably connected to the diversion frame 10, so that the honeycomb heat exchange sheet 8 can drive the plurality of honeycomb heat exchange rings 17 to rotate reciprocally inside the honeycomb outer holes 11, realizing multi-faceted variable-position heat exchange contact. A feed pipe 29 is provided on one side of the variable-position electric cylinder 2, and a heat recovery pipe 30 is provided on one side of the feed pipe 29; both the feed pipe 29 and the heat recovery pipe 30 are fixedly communicated with the tower shell 1, so as to facilitate the entry of materials into the tower shell 1 through the feed pipe 29, and the heat recovery pipe 30 can be docked on the heat recovery steam pipeline. A support frame 18 is fixedly connected to the bottom end of the honeycomb inner column 9, and the support frame 18 is fixedly connected to the diversion frame 10. The honeycomb heat exchange sheet 8 is rotatably connected to the support frame 18, so that the diversion frame 10 can support the support frame 18, and the support frame 18 can support the plurality of honeycomb inner columns 9, increasing the stability of the honeycomb inner columns 9.

[0031] In this technical solution, as shown in the attached Figure 8 - attached Figure 9 As shown, a main heat supply pipe 19 is fixedly communicated with one side of the inner wall of the diversion frame 10 and is located below the diversion frame 10. A shunt heat exchange assembly is provided below the main heat supply pipe 19; the shunt heat exchange assembly includes a shunt cone 20 fixedly arranged below the main heat supply pipe 19. The bottom end of the shunt cone 20 is fixedly connected with a support column 21, and a plurality of diversion sleeve plates 22 are fixedly installed on the outer wall of the support column 21. The plurality of diversion sleeve plates 22 are all fixedly connected with the tower shell 1; a connecting pipe 24 is fixedly communicated with one side of the outer wall of the main heat supply pipe 19, and a secondary heat supply pipe 23 is fixedly communicated with the top end of the connecting pipe 24; the shunt heat exchange assembly further includes a drying box 25, a resistance heating plate 26, a controller 27 and a fan 28.

[0032] The drying box 25 is fixedly communicated with the bottom end of the main heat supply pipe 19. The resistance heating plate 26 is fixed to the bottom end of the drying box 25. The controller 27 is fixed to one side of the resistance heating plate 26. The fan 28 is fixedly communicated with one side of the drying box 25. The outer wall of the shunt cone 20 is a smooth surface, and the support column 21 is used to support the diversion sleeve plates 22.

[0033] The secondary heat supply pipe 23 is fixedly connected with the tower shell 1 and is communicated with the tower shell 1. The inner walls of the secondary heat supply pipe 23 and the connecting pipe 24 are both smooth surfaces.

[0034] The working principle of the heat recovery cascade drying tower of the present invention is as follows:

[0035] First, when the present invention is installed and supported, the tower shell 1 is supported by the fixing frame 15 to increase the stability of the tower shell 1, and the feed pipe 29 is docked on the material conveying pipeline, while the heat recovery pipe 30 can be docked on the heat recovery steam pipeline.

[0036] Secondly, when the present invention performs split-flow heat exchange, the controller 27 turns on the resistance heating plate 26, and at the same time, the controller 27 starts the fan 28. The fan 28 allows the externally pressurized wind to enter the drying box 25. The resistance heating plate 26 heats the air inside the drying box 25, and the heated air is pressurized and conveyed into the main heat supply pipe 19, and is sprayed from the main heat supply pipe 19 onto the split-flow cone 20. The split-flow cone 20 splits the hot air for upward discharge. At the same time, the main heat supply pipe 19 conveys another part of the hot air into the connecting pipe 24, enters the auxiliary heat supply pipe 23 through the connecting pipe 24, and is conveyed by the auxiliary heat supply pipe 23 into the tower shell 1, and a relatively large amount of heated air is conveyed into the plurality of honeycomb outer holes 11 inside the flow guide frame 10.

[0037] Then, when the present invention performs honeycomb internal and external displacement heat exchange, the material enters the tower shell 1 through the feed pipe 29, and is guided and split by the guide block 12, and is split into the external honeycomb gaps formed between the honeycomb outer holes 11 and the honeycomb heat exchange fins 8, and the material is also guided by the honeycomb inner column 9 into the internal honeycomb gaps formed between the honeycomb inner column 9 and the honeycomb heat exchange fins 8. At the same time, the controller 27 starts the displacement electric cylinder 2, and the displacement electric cylinder 2 pushes the connecting bar 3 to move leftward. After the connecting bar 3 drives the rack 4 to move leftward, it then moves rightward.

[0038] The rack 4 drives the gear 5 to rotate reciprocally, the gear 5 drives the displacement rotating shaft 6 to rotate reciprocally, the displacement rotating shaft 6 drives the L-shaped bar 7 to rotate reciprocally, the L-shaped bar 7 drives the honeycomb heat exchange fins 8 to rotate reciprocally, and the honeycomb heat exchange fins 8 drive a plurality of honeycomb heat exchange rings 17 to rotate reciprocally inside the honeycomb outer holes 11. The plurality of honeycomb heat exchange rings 17 make inclined rotating contact with the material, and the inner wall of the honeycomb heat exchange fins 8 can rotate reciprocally outside the honeycomb inner column 9. In this way, the material in the external honeycomb gaps of the honeycomb heat exchange fins 8 can achieve reciprocating displacement contact, and the material in the internal honeycomb gaps of the honeycomb heat exchange fins 8 can achieve reciprocating displacement contact. At the same time, the flow guide frame 10 supports the support frame 18, and the support frame 18 can support a plurality of honeycomb inner columns 9. The honeycomb heat exchange fins 8 rotate reciprocally on the support frame 18, and the angle sensor 13 is supported by the support bar 14. The angle sensor 13 senses the angle of the displacement rotating shaft 6, and the sensed rotation angle of the displacement rotating shaft 6 is within a forty-five-degree range to achieve the reciprocating rotation function. In this way, the material can achieve internal honeycomb multi-faceted displacement heat exchange contact drying, and the material can achieve external honeycomb multi-faceted displacement heat exchange contact.

[0039] Finally, when the present invention performs heat exchange recovery and discharging, the dried material is split along the split-flow cone 20 onto a plurality of diversion sleeve plates 22, and is discharged downward along the diversion sleeve plates 22 into the discharge hopper 16, and the discharge hopper 16 discharges the material. At the same time, the steam is discharged into the recovery channel along the heat recovery pipe 30, and the recovered heat is used for heating other equipment.

[0040] Contents not described in detail in the specification belong to the prior art well-known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited. Conventional equipment can be used. In this technical solution, since the electrical control components not mentioned belong to the prior art, they are not shown in the figure and will not be described herein.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A heat recovery cascade drying tower, comprising a tower shell (1) and a displacement electric cylinder (2), wherein the displacement electric cylinder (2) is fixed at the top of the tower shell (1), and is characterized in that: The pushing end of the position-changing electric cylinder (2) is provided with a honeycomb internal and external position-changing heat exchange mechanism; The honeycomb internal and external displacement heat exchange mechanism comprises a connecting bar (3) fixedly mounted on the pushing end of the displacement electric cylinder (2), both ends of the connecting bar (3) are fixedly connected to racks (4), and one side of each rack (4) is meshingly connected to two gears (5); the inner wall of the gear (5) is fixedly connected to a displacement shaft (6), the displacement shaft (6) is rotatably connected to the tower shell (1), an L-shaped bar (7) is fixedly connected to one side of the outer wall of the displacement shaft (6), a honeycomb heat exchange plate (8) is fixedly mounted on the bottom end of the L-shaped bar (7), a honeycomb inner column (9) is rotatably mounted inside the honeycomb heat exchange plate (8), and one side of the inner wall of the tower shell (1) is fixedly connected to the displacement shaft (6). A guide frame (10) is fixedly connected, a gap is provided between the outer wall of the honeycomb inner column (9) and the inner wall of the honeycomb heat exchange plate (8), the inner wall of the guide frame (10) is a smooth surface, a plurality of honeycomb outer holes (11) are opened inside the guide frame (10), and a guide block (12) is fixedly installed on the top of the guide frame (10); an angle sensor (13) is installed on the top of one of the displacement shafts (6), and the sensing end of the angle sensor (13) is fixedly connected to the displacement shaft (6), and a plurality of honeycomb heat exchange rings (17) are fixedly connected to the outer wall of the honeycomb heat exchange plate (8), and the honeycomb heat exchange rings (17) are rotatably connected to the guide frame (10).

2. The heat recovery cascade drying tower according to claim 1, wherein: The two racks (4) are symmetrically arranged with respect to the connecting bar (3), and the cross-sectional shape of the racks (4) is L-shaped.

3. The heat recovery cascade drying tower according to claim 1, wherein: A support bar (14) is fixedly connected to one side of the outer wall of the angle sensor (13); the support bar (14) is fixedly installed between the tower shell (1).

4. The heat recovery cascade drying tower according to claim 1, characterized in that: A fixing frame (15) is fixedly mounted on one side of the tower shell (1), and a discharge hopper (16) is fixedly connected to the bottom end of the tower shell (1). The fixing frame (15) is used to support the tower shell (1).

5. The heat recovery cascade drying tower according to claim 1, characterized in that: A feed pipe (29) is provided on one side of the position-changing electric cylinder (2), and a heat recovery pipe (30) is provided on one side of the feed pipe (29); The feed pipe (29) and the heat recovery pipe (30) are both fixedly connected to the tower shell (1); The bottom end of the honeycomb inner column (9) is fixedly connected to a support frame (18), and the support frame (18) is fixedly connected to the guide frame (10), and the honeycomb heat exchange plate (8) is rotatably connected to the support frame (18).

6. The heat recovery cascade drying tower according to claim 1, wherein: A main heat supply pipe (19) is fixedly connected to one side of the inner wall of the guide frame (10) and located below the guide frame (10), and a split heat exchange component is provided below the main heat supply pipe (19); The diversion heat exchange assembly comprises a diversion cone (20) fixedly arranged below the main heat supply pipe (19); the bottom end of the diversion cone (20) is fixedly connected to a support (21); a plurality of guide sleeves (22) are fixedly mounted on the outer wall of the support (21); and the plurality of guide sleeves (22) are fixedly connected to the tower shell (1); One side of the outer wall of the main heat supply pipe (19) is fixedly communicated with a connecting pipe (24), and a secondary heat supply pipe (23) is fixedly communicated with the top end of the connecting pipe (24); The flow splitting and heat exchange assembly further includes a drying box (25), a resistance heating plate (26), a controller (27), and a fan (28); The drying box (25) is fixedly communicated with the bottom end of the main heat supply pipe (19), the resistance heating plate (26) is fixed at the bottom end of the drying box (25), the controller (27) is fixed on one side of the resistance heating plate (26), and the fan (28) is fixedly communicated with one side of the drying box (25).

7. The heat recovery cascade drying tower according to claim 6, wherein: The outer wall of the flow splitting cone (20) is a smooth surface, and the support column (21) is used to support the flow guiding sleeve plate (22).

8. The heat recovery cascade drying tower according to claim 6, characterized in that: The secondary heat supply pipe (23) is fixedly connected to the tower shell (1), and the secondary heat supply pipe (23) is communicated with the tower shell (1). The inner walls of the secondary heat supply pipe (23) and the connecting pipe (24) are both smooth surfaces.

Images