Double-shaft stirring and drying all-in-one machine

Abstract

The utility model discloses a double-shaft stirring and drying all-in-one machine and belongs to the technical field of stirring and drying equipment. Which comprises a machine shell, a working cavity is formed in the machine shell, two stirring shafts are arranged in the working cavity side by side, and two driving motors connected with the two stirring shafts respectively are further arranged, and is characterized in that two speed reducers are arranged, the two driving motors are connected with one stirring shaft through the corresponding speed reducers respectively, and input shafts of the two speed reducers are oppositely arranged; and the input shafts of the two speed reducers are connected through a synchronizing mechanism. According to the double-shaft stirring and drying all-in-one machine, the two driving motors are arranged to drive the two stirring shafts to rotate through the corresponding speed reducers, on the premise that enough torque is guaranteed, the two speed reducers are connected through the synchronizing mechanism, and the synchronism of the two stirring shafts during rotation is guaranteed; the possibility that the blades collide due to the rotating speed deviation of the driving motor is avoided, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of stirring and drying equipment, in particular to a double-shaft stirring and drying integrated machine. Background Art

[0002] The sludge has a high water content, which is not conducive to its transportation and subsequent disposal. In the process of various sludge disposal methods such as agricultural use, landfill, incineration, and building material utilization, the premise is that the moisture content of the sludge must meet the relevant requirements, so the sludge needs to be dried. In the prior art, the most common equipment for sludge drying is a stirring dryer, in which a stirring shaft is provided, and paddles are provided on the surface of the stirring shaft. When the stirring shaft rotates, the paddles are driven to stir the sludge, and at the same time, the stirring dryer is heated to complete the drying of the sludge.

[0003] The traditional stirring dryer is a single-shaft type. Since this type of single-shaft stirring dryer is only equipped with one stirring shaft, its working efficiency is low. Therefore, some double-shaft stirring dryers have also appeared on the market. For example:

[0004] The technical solution disclosed in the Chinese invention patent with publication number CN104482735A, application date December 17, 2014, and patent name “Double-axis stirring paddle dryer”.

[0005] The technical solution disclosed in the Chinese invention patent with publication number CN113405337A, application date June 28, 2021, and patent name "A energy-saving and environmentally friendly hollow paddle dryer".

[0006] In order to avoid collision between the blades when the two stirring shafts rotate, the two stirring shafts must rotate synchronously. Therefore, in the existing double-shaft stirring dryer including the above technical solution, the two transmission shafts are preferably connected by gear meshing, and the two stirring shafts are driven to rotate simultaneously by a driving motor. Although this method can effectively ensure the synchronization of the two stirring shafts when rotating, only one driving motor is provided, and the torque provided is limited, especially when the sludge has a large viscosity, so it is difficult to achieve the expected stirring effect.

[0007] The Chinese utility model patent with the publication number CN218307341U and the application date of September 5, 2022, and the patent name "A drawer-type double-shaft paddle dry mixer" discloses a technical solution in which two drive motors are provided, and the two drive motors respectively drive the two stirring shafts to rotate. Although this solution can provide sufficient torque for the stirring shaft, once there is a deviation in the rotation of the two motors, when the deviation accumulates to a certain extent, there is a risk of collision between the paddles on the two stirring shafts, so there are certain safety hazards. Utility Model Content

[0008] The technical problem to be solved by the utility model is: to overcome the shortcomings of the prior art and provide a dual-shaft stirring and drying integrated machine which is provided with two driving motors which respectively drive the two stirring shafts to rotate through their own reducers. Under the premise of ensuring sufficient torque, the two reducers are connected through a synchronization mechanism to ensure the synchronization of the two stirring shafts when rotating, avoid the possibility of collision of the blades due to the speed deviation of the driving motor, and eliminate the safety hazard.

[0009] The technical solution adopted by the utility model to solve its technical problems is: the double-shaft stirring and drying integrated machine comprises a casing, a working chamber is inside the casing, two stirring shafts are arranged side by side in the working chamber, and two driving motors are respectively connected to the two stirring shafts, and the utility model is characterized in that: two reducers are also arranged, the two driving motors are respectively connected to the input shafts of the corresponding reducers, the output shafts of the two reducers are respectively connected to the corresponding stirring shafts, the input shafts of the two reducers are arranged opposite to each other, and the input shafts of the two reducers are connected by a synchronization mechanism.

[0010] Preferably, at least one of the two driving motors is connected to the input shaft of the corresponding reducer through a pulley transmission.

[0011] Preferably, the synchronization mechanism is a coupling.

[0012] Preferably, a plurality of paddle shafts are radially fixed on each stirring shaft, a paddle shaft is fixed at the end of each paddle shaft, the paddle shafts on the two stirring shafts are of the same number and are arranged opposite to each other, and the axial angles of any two adjacent paddle shafts are the same.

[0013] Preferably, any two adjacent blade shafts are axially spaced apart along the surface of the stirring shaft.

[0014] Preferably, the casing comprises an inner casing and an outer casing which are spaced apart from each other, and a coil for passing steam is arranged in the interlayer between the inner casing and the outer casing.

[0015] Preferably, a suction fan is arranged on the top of the casing, the air inlet of the suction fan is connected to the working chamber, and the air outlet of the suction fan is connected to the condenser on the side of the casing through an air suction pipe.

[0016] Preferably, a steam inlet pipeline is provided on the side of the casing, the steam inlet pipeline is connected to the coil, and the steam inlet pipeline is also connected to the stirring shaft cavity of the stirring shaft.

[0017] Preferably, an end cover is provided at the upper port of the casing, an air supply connector for supplying air into the working chamber is provided on the surface of the casing, the air supply connector is connected to the air supply outlet of the end cover, and an air supply preheating channel is provided in the end cover.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] In this dual-shaft stirring and drying machine, two driving motors are provided to drive the two stirring shafts to rotate through their own reducers respectively. Under the premise of ensuring sufficient torque, the two reducers are connected through a synchronization mechanism to ensure the synchronization of the two stirring shafts during rotation, avoid the possibility of collision of the blades due to the speed deviation of the driving motor, and eliminate safety hazards.

[0020] In this dual-axis mixing and drying machine, the driving motor and the corresponding reducer are connected by belt drive. When a rotation deviation occurs between the two driving motors, sliding friction will occur between the corresponding transmission belt and the pulley, thereby ensuring that the two driving motors provide power at the same time, while achieving synchronous rotation between the two reducers and avoiding damage caused by uneven torque at both ends of the coupling.

[0021] Only one paddle shaft is arranged on the circumference of the same paddle shaft, thus greatly reducing the rotation load of each stirring shaft.

[0022] In the dual-shaft stirring and drying integrated machine, an air supply preheating channel is provided in the end cover to preheat the air supplied into the working chamber, thereby preventing the external low-temperature air from directly entering the working chamber and causing an impact on the working chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an axonometric view of Example 1 of the dual-axis stirring and drying integrated machine.

[0024] Figure 2 This is a front view of Example 1 of the dual-axis stirring and drying integrated machine.

[0025] Figure 3 for Figure 2 Left view of .

[0026] Figure 4 for Figure 2 The view after the housing is omitted.

[0027] Figure 5 for Figure 2 AA section view.

[0028] Figure 6 for Figure 2 Right side view with the transmission case omitted.

[0029] Figure 7 This is an axonometric view of the stirring shaft embodiment 1 of the double-shaft stirring and drying integrated machine.

[0030] Figure 8 This is a top view of the stirring shaft embodiment 1 of the double-shaft stirring and drying integrated machine.

[0031] Fig. 9 for Figure 8 Middle BB section view.

[0032] Fig.10 for Fig. 9 Enlarged view of point A in the middle.

[0033] Fig.11 This is the left view of Example 1 of the condenser of the dual-axis stirring and drying integrated machine.

[0034] Fig.12 for Fig.11 CC section view.

[0035] Fig.13 This is a top view of embodiment 1 of the end cover of the dual-axis stirring and drying integrated machine.

[0036] Fig.14 for Fig.13 Rear view of.

[0037] Fig.15 for Fig.13 Bottom view of .

[0038] Fig.16 for Fig.13 Right view of .

[0039] Fig.17 for Fig.13 Middle DD section view.

[0040] Fig.18 for Fig.15 EE section view.

[0041] Fig.19 for Fig.15 FF section view.

[0042] Fig. 20 Example 2 corresponds to Example 1 Figure 3 of the view.

[0043] Fig.21 Example 2 corresponds to Example 1 Fig.17 of the view.

[0044] Fig. 22 This is a front view of Example 4 of the dual-axis stirring and drying machine.

[0045] Fig.23 This is the axonometric diagram of the aeration mechanism of the dual-axis stirring and drying machine.

[0046] Among them: transmission box 1; end cover 2; suction fan 3; suction pipe 4; feed pipe 5; steam valve 6; stirring shaft end 7; condenser 8; heat exchange fan 9; steam exhaust pipe group 10; stirring shaft 11; steam inlet pipeline 12; base 13; shell 14; drive motor 15, exhaust pipe 16; reducer 17; air supply joint 18; coupling 19; transmission belt 20; slag discharge port 21; inner shell 22; coil 23; paddle 24; paddle shaft 25; shaft body 26; stirring shaft cavity 27; steam inlet 28; steam delivery pipe 29; steam outlet 30; heat exchange gas output pipe 31; condenser shell 32 ; Waste gas inlet 33; Waste gas outlet 34; Waste liquid discharge pipe 35; Upper perforated plate 36; Heat exchange tube 37; Lower perforated plate 38; Feed port 39; End cover shell 40; Waste gas exhaust port 41; Air supply outlet 42; Air supply inlet 43; Waste gas output port 44; First heat exchange chamber 45; Second heat exchange chamber 46; Preheating chamber 47; Vertical partition 48; First transition chamber 49; Second transition chamber 50; Circulation port 51; Cavity connecting port 52; Heater 53; Connecting pipe 54; Air supply pipe 55; Aeration mechanism 56; Bracket 57; Fan 58; Aeration hard pipe 59; Aeration hose 60; Aeration head 61. DETAILED DESCRIPTION

[0047] Figures 1 to 19 It is the best embodiment of the utility model, and the following Figures 1 to 23 The utility model is further described.

[0048] Embodiment 1:

[0049] like Figures 1 to 3 As shown, the dual-axis stirring and drying integrated machine includes a base 13, a housing is arranged on the upper part of the base 13, and the housing is a working chamber for stirring and drying. Figure 5 Two stirring shafts 11 are horizontally arranged inside the casing. The two stirring shafts 11 are horizontally arranged inside the casing. A transmission box 1 and a drive motor 15 are arranged on the surface of the base 13. The transmission box 1 and the drive motor 15 are located on the same side of the casing. The drive motor 15 drives the two stirring shafts 11 to rotate inside the casing through the transmission box 1 to stir and dry the sludge inside the casing. A slag discharge port 21 is also arranged on the side of the casing to discharge the dried sludge.

[0050] The upper port of the casing is closed by an end cover 2, and a feed pipe 5 is arranged on the surface of the end cover 2, and the sludge enters the casing from the feed pipe 5. A suction fan 3 is also arranged on the top of the casing, and the air inlet end of the suction fan 3 is connected to the casing through the end cover 2, and the air outlet end of the suction fan 3 is connected to one end of the suction pipe 4. A condenser 8 is arranged on the outside of the base 13, and the other end of the suction pipe 4 is connected to the inlet of the condenser 8, and the outlet of the condenser 8 is connected to an exhaust pipe 16.

[0051] A heat exchange fan 9 is provided at the bottom of the condenser 8, and the heat exchange fan 9 supplies heat exchange air into the condenser 8. The high-temperature exhaust gas discharged from the casing is sent into the condenser 8 through the suction pipe 4. The high-temperature exhaust gas convects with the heat exchange air supplied by the heat exchange fan 9 in the condenser 8 to achieve heat exchange, and the treated high-temperature exhaust gas is discharged through the exhaust pipe 16.

[0052] like Figure 4 As shown, the housing includes an outer shell 14 and an inner shell 22, wherein the interior of the inner shell 22 is a working area, the outer shell 14 is sleeved outside the inner shell 22, and a sandwich is formed between the outer shell 14 and the inner shell 22. Two groups of coils 23 are arranged in the sandwich, and the two groups of coils 23 are respectively located at the front and rear sides of the sandwich.

[0053] A steam inlet pipe 12 is provided at the end of the casing. The steam inlet pipe 12 is located at the upper part of the end of the casing close to the condenser 8. The steam inlet pipe 12 is arranged horizontally, and its two ends respectively penetrate the outer shell 14 and are connected to the inlets of the two groups of coils 23 in the interlayer. The coils 23 are arranged back and forth along the contour of the interlayer from top to bottom, and the outlets of the two groups of coils 23 extend to the bottom of the casing at the same time. A steam exhaust pipe group 10 is also provided at the bottom of the casing. The inlets of the steam exhaust pipe group 10 are respectively connected to the outlets of the two groups of coils 23, and a valve body (such as a steam trap) is also provided on the pipeline of the steam exhaust pipe group 10.

[0054] A flange is provided on the surface of the steam inlet pipeline 12, and the external high-temperature steam is introduced into the steam inlet pipeline 12 through the flange. A steam valve 6 is also installed in the middle of the steam inlet pipeline 12, and a tee is connected to the port of the steam valve 6. Stirring shaft ends 7 are respectively provided at the ends of the two stirring shafts 11, and the other two ports of the tee at the outlet of the steam valve 6 are respectively connected to the stirring shaft ends 7 at the ends of the two stirring shafts 11 through pipelines, and the high-temperature steam in the steam inlet pipeline 12 is introduced into the two stirring shafts 11 at the same time.

[0055] like Figure 7-8 As shown, the stirring shaft 11 includes a shaft body 26, both ends of which penetrate the end surfaces of the housing, one end of which is connected to the transmission box 1, and the stirring shaft end 7 at the other end is connected to the steam valve 6. On the surface of the shaft body 26, a plurality of paddle shafts 25 are arranged in sequence along the axial direction of the shaft body 26, and the paddle shafts 25 are radially fixed on the surface of the shaft body 26. A paddle 24 is respectively arranged at the outer end of each paddle shaft 25.

[0056] The fixing points of all the blade shafts 25 and the shaft body 26 are arranged in a spiral line on the surface of the shaft body 26, that is, only one blade shaft 25 is arranged on the circumference of the same blade shaft 25, thereby greatly reducing the rotation load of each stirring shaft 11, and avoiding the contact between the two blade shafts 25 at the phase position on the two stirring shafts 11 during rotation. Among all the blade shafts 25 on the surface of the shaft body 26, the axes of any two blade shafts 25 are arranged at equal angles (right angles).

[0057] In the two stirring shafts 11, since a paddle shaft 25 is respectively provided at the same position, and in order to fully stir the sludge in the working chamber, the stirring trajectories of the two paddle shafts 25 at the same position in the two stirring shafts 11 overlap, in order to avoid the collision of the two paddle shafts 25 at the same position in the two stirring shafts 11, the two stirring shafts 11 must keep rotating synchronously when rotating. To achieve this purpose, the following method is used:

[0058] like Figure 6 As shown, two drive motors 15 are arranged on the surface of the base 13, and the two drive motors 15 are respectively connected to a stirring shaft 11 through a reducer 17. The two drive motors 15 respectively drive a stirring shaft 11 to rotate, thereby ensuring the torque required for the two stirring shafts 11 to rotate.

[0059] The reducer 17 is implemented by a right-angle shaft reducer known in the art: the output shafts of the two reducers 17 are coaxially fixed to the two stirring shafts 11, and the input shafts of the two reducers 17 are arranged opposite to each other. The input shafts of the two reducers 17 are connected by a coupling 19, thereby ensuring that the input shafts of the two reducers 17 rotate synchronously, that is, the output shafts of the two reducers 17 rotate synchronously, thereby further realizing the synchronous rotation of the two stirring shafts 11, and avoiding collision between the two blade shafts 25 at the same position in the two stirring shafts 11.

[0060] In order to prevent the coupling 19 from twisting and being damaged due to speed difference and other reasons, the two drive motors 15 are connected to the corresponding reducers 17 through pulley mechanisms. Specifically, driving pulleys are coaxially fixed on the motor shafts of the two drive motors 15, and driven pulleys are coaxially fixed on the input shafts of the two reducers 17. The driving pulleys are connected to the corresponding driven pulleys through a transmission belt 20. When there is a rotation deviation between the two drive motors 15, the corresponding transmission belt 20 will slide (slip) with the pulleys, thereby ensuring that the two drive motors 15 provide power at the same time and realizing the synchronous rotation between the two reducers 17 at the same time.

[0061] like Figures 9 and 10As shown, the shaft body 26 of the stirring shaft 11 is a hollow structure, the interior of the shaft body 26 is a stirring shaft cavity 27, and the blade shaft 25 is also a hollow structure, and the inner cavity of the blade shaft 25 is connected to the stirring shaft cavity 27. Both ends of the stirring shaft cavity 27 are closed, and the stirring shaft end 7 is installed at one of the closed ends and is rotatably connected to the closed end.

[0062] The stirring shaft end 7 has an inner and outer sleeve structure, in which a steam delivery pipe 29 is coaxially arranged in its inner cavity. The end of the steam delivery pipe 29 located outside the casing is a steam inlet 28, and the steam inlet 28 is connected to the tee at the end of the steam valve 6. The steam delivery pipe 29 passes through the closed end of the stirring shaft cavity 27 and then enters the stirring shaft cavity 27. The inner cavity of the steam delivery pipe 29 is the inner cavity of the stirring shaft end 7, and the cavity formed by the outer wall of the steam delivery pipe 29 and the inner wall of the stirring shaft end 7 is the outer cavity of the stirring shaft end 7, and the outer cavity is also connected to the stirring shaft cavity 27. A steam outlet 30 is also arranged outside the casing, and the steam outlet 30 is connected to the outer cavity of the stirring shaft end 7.

[0063] The external high-temperature steam enters the stirring shaft cavity 27 through the steam delivery pipe 29, and then enters the inner cavity of the blade shaft 25 through the stirring shaft cavity 27, thereby heating the stirring shaft 11 and the blade shaft 25. Combined with the coil 23 arranged in the casing, the sludge in the working cavity is also heated, thereby improving the drying efficiency of the sludge. The steam entering the stirring shaft cavity 27 is discharged from the steam outlet 30, and the condensed water formed in the stirring shaft cavity 27 and the inner cavity of the blade shaft 25 is discharged from the steam outlet 30 at the same time.

[0064] like Fig.11 As shown, the condenser 8 includes a cylindrical condenser shell 32, which is a cylindrical shape with two ends open. An upper cover is provided at the upper end of the condenser shell 32, and a lower cover is provided at the lower end of the condenser shell 32. A heat exchange gas output pipe 31 is provided at the center of the upper cover, and a bend is provided at the center of the lower cover, and the other end of the bend is connected to the air outlet of the above-mentioned heat exchange fan 9.

[0065] Combination Fig.12 An upper perforated plate 36 is horizontally arranged at the junction of the condenser shell 32 and the upper cover, and a lower perforated plate 38 is horizontally arranged at the junction of the condenser shell 32 and the lower cover. A plurality of upper through holes are opened on the surface of the upper perforated plate 36, and a plurality of lower through holes are opened on the surface of the lower perforated plate 38, and the upper through holes correspond to the lower through holes one by one. A plurality of heat exchange tubes 37 are arranged in the condenser shell 32, and the upper end of each heat exchange tube 37 is connected to one of the upper through holes on the surface of the upper perforated plate 36, and the lower end of the heat exchange tube 37 is connected to the corresponding lower through hole on the surface of the lower perforated plate 38.

[0066] An exhaust gas inlet 33 is provided at the upper part of the condenser shell 32, and the outer port of the exhaust gas inlet 33 is connected to the exhaust port of the above-mentioned air suction pipe 4. An exhaust gas outlet 34 is provided in the middle part of the condenser shell 32, and the exhaust gas outlet 34 is connected to the above-mentioned exhaust pipe 16. The exhaust gas inlet 33 is provided at the tangent of the outer circle of the condenser shell 32, so when the exhaust gas enters the condenser shell 32, it will flow along the inner wall of the condenser shell 32 and form a vortex.

[0067] During the swirling process of the exhaust gas in the condenser shell 32, it will flow through the gaps between all the heat exchange tubes 37, thereby exchanging heat with the gas in the heat exchange tubes 37 to achieve cooling. The cooled gas will be discharged through the exhaust gas outlet 34 and then enter the exhaust pipe 16, and then sent to the subsequent exhaust gas treatment unit by the exhaust pipe 16 for exhaust gas treatment.

[0068] The exhaust gas introduced from the exhaust gas inlet 33 undergoes condensation and heat exchange in the condenser shell 32. The condensed water and liquid carried by the exhaust gas itself are discharged through the waste liquid discharge pipe 35 at the bottom of the condenser shell 32 and sent to the subsequent waste liquid treatment unit. The waste liquid discharge pipe 35 is located at the upper part of the lower perforated plate 38. The gas introduced by the heat exchange fan 9 does not come into contact with the exhaust gas and carry harmful substances because it only flows and exchanges heat in the heat exchange tube 37. Therefore, it is directly discharged into the atmosphere from the heat exchange gas output pipe 31 after completing the heat exchange.

[0069] like Figures 13-15 As shown, the end cover 2 disposed at the upper port of the casing includes an end cover shell 40, which is in the shape of a rectangular body. A feed port 39 and an exhaust gas outlet 41 are disposed on the surface of the end cover shell 40, the feed port 39 is connected to the above-mentioned feed pipe 5, and the exhaust gas outlet 41 is connected to the air inlet end of the above-mentioned suction fan 3. A group of air supply outlets 42 are disposed at the end of the end cover shell 40, and an air supply connector 18 is disposed at the end surface of the casing. The air supply outlet 42 is connected to the outer port of the air supply connector 18 through a pipeline, and the inner port of the air supply connector 18 is connected to the casing.

[0070] Combination Figures 16 to 19 , three chambers are horizontally arranged in the end cover shell 40: a first heat exchange chamber 45, a preheating chamber 47 and a second heat exchange chamber 46. The first heat exchange chamber 45, the preheating chamber 47 and the second heat exchange chamber 46 are arranged in sequence from top to bottom, and two adjacent chambers are separated by a partition arranged horizontally in the end cover shell 40. A vertical partition 48 is also arranged at both ends of the preheating chamber 47. Two independent transition chambers are also formed between the vertical partitions 48 on both sides and the inner wall of the end cover shell 40: a first transition chamber 49 and a second transition chamber 50. A supplementary air inlet 43 is arranged at the end of the first heat exchange chamber 45, and the supplementary air inlet 43 and the supplementary air outlet 42 are located at the same end of the end cover shell 40.

[0071] The feed port 39 passes through the first heat exchange chamber 45, the preheating chamber 47 and the second heat exchange chamber 46 in sequence and communicates with the working chamber, while the exhaust gas outlet 41 passes through the first heat exchange chamber 45 and communicates with the preheating chamber 47. Exhaust gas outlets 44 are also provided at the four corners of the bottom surface of the end cover shell 40, and the exhaust gas outlets 44 pass through the second heat exchange chamber 46 upward and communicate with the preheating chamber 47.

[0072] A plurality of circulation ports 51 are respectively provided at the ends of the upper and lower horizontal partitions of the preheating chamber 47, and the two groups of circulation ports 51 are respectively connected to the first transition chamber 49. Therefore, the first heat exchange chamber 45 and the second heat exchange chamber 46 are connected through the upper and lower groups of circulation ports 51. A cavity connecting port 52 is also provided at the end of the horizontal partition at the lower part of the preheating chamber 47, and the cavity connecting port 52 is located at the other end of the circulation port 51 and connects the second transition chamber 50 and the second heat exchange chamber 46. The above-mentioned air supply outlet 42 is connected to the second transition chamber 50 from the side of the end cover shell 40.

[0073] The specific working process and working principle are as follows:

[0074] The sludge to be treated is fed into the housing through the feed pipe 5. The two drive motors 15 located on the surface of the base 13 are connected to the corresponding reducers 17 through their respective pulley mechanisms, and the two reducers 17 drive a stirring shaft 11 to rotate respectively to stir the sludge. The two stirring shafts 11 rotate synchronously during the stirring process, and stir the sludge through the paddles 24 at the ends of the paddle shafts 25 on the surfaces of their respective shaft bodies 26.

[0075] When the two stirring shafts 11 are stirring the sludge, external high-temperature steam is introduced through the steam inlet pipeline 12. The high-temperature steam is introduced into the two sets of coils 23 in the interlayer of the casing through the steam inlet pipeline 12; at the same time, the high-temperature steam is introduced into the stirring shaft cavity 27 of the stirring shaft 11 through the steam valve 6 and the stirring shaft end 7. The high-temperature steam heats up the shaft body 26 through the stirring shaft cavity 27, and at the same time, enters the inner cavity of the blade shaft 25 through the stirring shaft cavity 27, thereby heating up the blade shaft 25, and in combination with the coils 23 arranged in the casing, the sludge in the working cavity is heated at the same time, thereby improving the drying efficiency of the sludge.

[0076] While the stirring and drying process is being performed in the working chamber, the suction fan 3 extracts the waste gas generated by drying and stirring in the working chamber and sends it into the condenser 8 through the suction pipe 4. After the waste gas enters the condenser shell 32 through the waste gas inlet 33, it flows on the inner wall of the condenser shell 32 and forms a vortex.

[0077] During the swirling process in the condenser shell 32, the exhaust gas will flow through the gaps between all the heat exchange tubes 37. At the same time, the heat exchange fan 9 sends low-temperature gas into the condenser shell 32, and the low-temperature gas will flow through the heat exchange tubes 37. The exhaust gas exchanges heat with the gas in the heat exchange tubes 37 to achieve cooling. The cooled gas will be discharged through the exhaust gas outlet 34 and enter the exhaust pipe 16, and then sent to the subsequent exhaust gas treatment unit by the exhaust pipe 16 for exhaust gas treatment.

[0078] The exhaust gas introduced from the exhaust gas inlet 33 undergoes condensation and heat exchange in the condenser shell 32. The condensed water and liquid carried by the exhaust gas itself are discharged through the waste liquid discharge pipe 35 at the bottom of the condenser shell 32 and sent to the subsequent waste liquid treatment unit. The waste liquid discharge pipe 35 is located at the upper part of the lower perforated plate 38. The gas introduced by the heat exchange fan 9 does not come into contact with the exhaust gas and carry harmful substances because it only flows and exchanges heat in the heat exchange tube 37. Therefore, it is directly discharged into the atmosphere from the heat exchange gas output pipe 31 after completing the heat exchange.

[0079] Since the exhaust fan 3 continuously discharges the waste gas in the working chamber, it is necessary to simultaneously replenish gas into the working chamber to avoid an excessive vacuum state in the working chamber. When a vacuum state is formed in the working chamber due to the exhaust gas discharge, under the action of the vacuum state, the external air enters the first heat exchange chamber 45 through the air replenishment inlet 43 at the end of the end cover shell 40, and the external air flows through the first heat exchange chamber 45 and then enters the first transition chamber 49 through the circulation port 51. Due to the obstruction of the vertical partition 48, it cannot enter the preheating chamber 47, so it enters the second heat exchange chamber 46 through the lower circulation port 51 again, and then enters the second transition chamber 50 through the second heat exchange chamber 46 and the cavity connecting port 52, and then enters the air replenishment outlet 42 through the second transition chamber 50, and enters the working chamber through the air replenishment outlet 42 and the air replenishment joint 18 to replenish air in the working chamber.

[0080] During the above-mentioned air replenishment process, the exhaust gas directly enters the preheating chamber 47 through the exhaust gas outlets 44 at the four corners and fills the preheating chamber 47. Since the temperature of the exhaust gas is relatively high, the gas to be replenished in the working chamber is preheated, and then enters the suction fan 3 and is discharged. Therefore, the gas to be replenished in the working chamber is replenished after passing through the preheating chamber 47 and completing preheating, thereby preventing the external air from directly entering the working chamber and causing a large fluctuation in the temperature in the working chamber.

[0081] Furthermore, when the gas that needs to be replenished into the working chamber flows through the above process, the length of its flow path is increased, thereby achieving sufficient preheating.

[0082] Embodiment 2:

[0083] like Fig. 20As shown, in this embodiment, a heater 53 is provided on the side of the condenser 8. A connecting pipe 54 is provided at the heat exchange gas output pipe 31 at the top of the condenser 8, and the connecting pipe 54 is connected to the inlet of the heater 53. An air supply pipe 55 is connected to the outlet of the heater 53, and the air supply pipe 55 is also connected to the working chamber to supply air to the working chamber.

[0084] As described above, the gas output through the heat exchange gas output pipe 31 is the gas flowing in the heat exchange tube 37 to cool and condense the exhaust gas. Therefore, after the exhaust gas undergoes heat exchange, preheating has been completed. Then, the heater 53 performs secondary heating, thereby reducing the energy consumed by the heater 53 while reaching the required temperature for replenishing the gas.

[0085] Embodiment 3:

[0086] like Fig.21 As shown, in this embodiment, only the first heat exchange chamber 45 and the second heat exchange chamber 46 are provided inside the end cover 2, and the feed port 39 and the end cover shell 40 both penetrate the end cover shell 40 and are directly connected to the working chamber.

[0087] Since the end cover 2 is arranged at the upper port of the working chamber, the end cover 2 itself has a relatively high temperature. Therefore, in this embodiment, the preheating chamber 47 is no longer provided, and only the high temperature of the end cover 2 itself is used to preheat the air to be supplied to the working chamber during the process of flowing through the first heat exchange chamber 45 and the second heat exchange chamber 46. Although the preheating effect of the end cover 2 in this embodiment on the gas is slightly inferior to that of the end cover 2 in embodiment 1, the solution in this embodiment reduces the complexity of the structure of the end cover 2 and reduces the processing cost.

[0088] Embodiment 4:

[0089] The difference between this embodiment and embodiment 1 is that an aeration mechanism 56 is provided in this embodiment. Figure 22-23 As shown, the aeration mechanism 56 includes a fan 58, which is fixed to the ground by a bracket 57. The air inlet of the fan 58 is connected to an external heat source, such as high-temperature steam, and the air outlet of the fan 58 is connected to an aeration hard pipe 59, which is arranged at the bottom of the shell 14 along the length direction of the shell 14. A plurality of aeration hoses 60 are respectively arranged on both sides of the aeration hard pipe 59, and the aeration hoses 60 on both sides are arranged along the axial direction of the aeration hard pipe 59.

[0090] One end of the aeration hose 60 is connected to the inner cavity of the aeration hard tube 59, and an aeration head 61 is installed at the other end of each aeration hose 60. The multiple aeration heads 61 on both sides of the aeration hard tube 59 are respectively arranged on both sides of the bottom of the outer shell 14, and are evenly arranged along the length of the outer shell 14, and are connected to the working cavity in the outer shell 14.

[0091] The dual-axis stirring and drying integrated machine in this embodiment is particularly suitable for aerobic fermentation of waste materials. The materials are fed into the housing through the feed pipe 5. The drive motor 15 located on the surface of the base 13 drives the two stirring shafts 11 to rotate through the reducer 17 to stir the materials. While the stirring and drying process is being carried out in the working chamber, the fan 58 works to send external high-temperature steam into the working chamber, providing sufficient oxygen to the materials when stirring the materials, so as to ensure that the materials can complete the fermentation reaction more efficiently in the working chamber.

[0092] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A dual-shaft stirring and drying integrated machine, comprising a housing, a working chamber within the housing, two stirring shafts (11) arranged side by side in the working chamber, and two drive motors (15) respectively connected to the two stirring shafts (11), characterized in that: Two reducers (17) are also provided, the two drive motors (15) are respectively connected to the input shafts of the corresponding reducers (17), the output shafts of the two reducers (17) are respectively connected to the corresponding stirring shafts (11), the input shafts of the two reducers (17) are arranged opposite to each other, and the input shafts of the two reducers (17) are connected via a synchronization mechanism.

2. The dual-shaft stirring and drying integrated machine according to claim 1, characterized in that: At least one of the two drive motors (15) is connected to the input shaft of the corresponding reducer (17) through a pulley transmission.

3. The dual-shaft stirring and drying integrated machine according to claim 1, characterized in that: The synchronizing mechanism is a coupling (19).

4. The dual-shaft stirring and drying integrated machine according to claim 1, characterized in that: A plurality of paddle shafts (25) are radially fixed on each stirring shaft (11), and a paddle (24) is fixed at the end of each paddle shaft (25). The paddle shafts (25) on the two stirring shafts (11) are the same in number and are arranged opposite to each other, and the axis angles of any two adjacent paddle shafts (25) are the same.

5. The dual-shaft stirring and drying integrated machine according to claim 4, characterized in that: Any two adjacent blade shafts (25) are arranged axially spaced apart along the surface of the stirring shaft (11).

6. The dual-shaft stirring and drying integrated machine according to claim 1, characterized in that: The casing comprises an inner casing (22) and an outer casing (14) which are arranged at an interval, and a coil (23) for passing steam is arranged in the interlayer between the inner casing (22) and the outer casing (14).

7. The dual-shaft stirring and drying integrated machine according to claim 1, characterized in that: A suction fan (3) is arranged on the top of the casing, an air inlet of the suction fan (3) is connected to the working chamber, and an air outlet of the suction fan (3) is connected to a condenser (8) on the side of the casing (14) via an air suction pipe (4).

8. The dual-shaft stirring and drying integrated machine according to claim 6, characterized in that: A steam inlet pipeline (12) is provided on the side of the casing, the steam inlet pipeline (12) is connected to the coil (23), and the steam inlet pipeline (12) is also connected to the stirring shaft cavity (27) of the stirring shaft (11).

9. The dual-shaft stirring and drying integrated machine according to claim 1, characterized in that: An end cover (2) is provided at the upper port of the casing, an air supply connector (18) for supplying air into the working chamber is provided on the surface of the casing, the air supply connector (18) is connected to the air supply outlet (42) of the end cover (2), and an air supply preheating channel is provided in the end cover (2).

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