Sludge drying frame, sludge drying room and sludge drying device

Abstract

The utility model provides a sludge drying frame, a sludge drying room and a sludge drying device. The sludge drying frame comprises a rack, a rotating shaft, a rotating shaft driving part, n supporting plates and n sludge stirring rakes. The n supporting plates are arranged on the rack at intervals in the vertical direction, and sludge falling openings are formed in the supporting plates; the rotating shaft sequentially penetrates through the n supporting plates; the n mud stirring rakes are installed on the rotating shaft in the vertical direction and correspond to the supporting plates in a one-to-one mode. The rotating shaft driving part is used for driving the rotating shaft to rotate so as to drive the n mud stirring rakes to rotate synchronously. Sludge is thrown into the supporting plate located on the uppermost layer. Sludge is distributed on the corresponding supporting plates under stirring of the sludge stirring rakes and falls onto the supporting plate located on the lower portion through the corresponding sludge falling openings. Sludge is thrown to the supporting plate located on the uppermost layer and then sequentially falls to the supporting plates from top to bottom through the sludge falling opening. Sludge is stirred by the sludge stirring rakes when staying on each layer of supporting plate, and moisture of the sludge is fully evaporated after n rounds of stirring and paving operation, so that the drying effect is achieved. The sludge does not need to be heated, so that the energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the field of sludge treatment, and specifically to a sludge drying rack, a sludge drying room and a sludge drying device. Background Art

[0002] At present, the commonly used method is to dry the sludge and then recycle it. Traditional sludge drying equipment dries the sludge by heating. This drying method consumes a lot of electricity, thereby increasing the cost of sludge treatment. Utility Model Content

[0003] In order to overcome at least one of the above disadvantages of the existing sludge drying device, the present application first provides a sludge drying rack, and its detailed technical solution is as follows:

[0004] A sludge drying frame comprises a frame, a rotating shaft, a rotating shaft driving part, n supporting plates and n mud rakes, wherein:

[0005] n supporting plates are arranged on the frame at intervals in the vertical direction, the supporting plates are used to carry the sludge to be dried, and each supporting plate is provided with a sludge outlet;

[0006] The rotating shaft is arranged on the frame in the vertical direction and passes through n supporting plates in sequence;

[0007] n mud rakes are installed on the rotating shaft at intervals along the vertical direction and correspond to the supporting plates one by one. The mud rakes are located above the corresponding supporting plates and close to the supporting plates;

[0008] The rotating shaft driving part is connected to the rotating shaft in a transmission manner, and the rotating shaft driving part is used to drive the rotating shaft to rotate, so as to drive the n mud rakes to rotate synchronously;

[0009] n is an integer greater than or equal to 2.

[0010] The sludge drying rack provided in the present application includes a plurality of trays arranged in layers along the vertical direction, and each tray is provided with a corresponding mud rake. After the sludge to be dried is placed on the tray located on the top layer, it falls onto each tray in turn from top to bottom through the mud drop port. The sludge remaining on each layer of the tray is stirred by the corresponding mud rake, and during this process, the moisture in the sludge evaporates from the sludge. After n rounds of stirring, the moisture in the sludge is fully evaporated, thereby achieving the effect of natural drying. Compared with the traditional heating drying method, the present application does not need to heat the sludge, thereby reducing energy consumption.

[0011] In some embodiments, a fender is provided at the peripheral side of the support plate.

[0012] By arranging the mud guard plate on the peripheral side of the supporting plate, the sludge is restrained and limited, thereby preventing the sludge from sliding off the peripheral side of the supporting plate when being stirred.

[0013] In some embodiments, a through hole is provided at the center of the support plate, the rotating shaft passes through the support plate through the through hole, and the mud outlet extends radially from the through hole toward the peripheral side of the support plate; the projections of the mud outlets of n support plates on the horizontal plane are staggered and evenly arranged along the stirring path of the mud rake.

[0014] By setting the positions of the mud outlets on the n pallets, it is ensured that when the sludge falls from the upper pallet to the lower pallet, it avoids the mud outlet on the lower pallet. In addition, the mud drop position on the lower pallet is set to the rear side of the mud outlet of the lower pallet to prevent the sludge from being pushed into the mud outlet by the mud rake after falling on the lower pallet.

[0015] In some embodiments, the mud outlet is fan-shaped, and the width of the mud outlet gradually increases from the through hole toward the peripheral side of the support plate.

[0016] The mud outlet is arranged in a fan shape, which can prevent the mud rake from getting stuck when passing through the mud outlet.

[0017] The present application also provides a sludge drying room, which comprises an outer cover, an air circulation system and any one of the above-mentioned sludge drying racks, wherein:

[0018] The sludge drying rack is arranged in the outer cover;

[0019] The air circulation system is used to drive the air to circulate between the inside and outside of the outer cover.

[0020] By arranging the sludge drying rack in the outer cover and driving the air to circulate between the inner and outer sides of the outer cover through the air circulation system, the moisture in the stirred sludge on the sludge drying rack can evaporate faster and flow out of the outer cover with the air, thereby improving the drying efficiency.

[0021] The present application also provides a sludge drying device, which includes a box body, a rotating shaft, a rotating shaft driving part, n supporting plates and n mud rakes, wherein:

[0022] The top of the box is provided with a mud throwing port and an air outlet pipe, and the bottom of the box is provided with an air inlet pipe;

[0023] n supporting plates are installed in the box at intervals along the vertical direction, and the supporting plates are used to carry the sludge to be dried, and each supporting plate is provided with a sludge outlet and a ventilation hole;

[0024] The lower end of the rotating shaft is rotatably connected to the bottom of the box body, and the rotating shaft passes through n supporting plates in sequence from bottom to top. The upper end of the rotating shaft passes through the box body upward and is connected to the rotating shaft driving part installed on the top of the box body.

[0025] n mud rakes are installed on the rotating shaft at intervals along the vertical direction and correspond to the supporting plates one by one. The mud rakes are located above the corresponding supporting plates and close to the supporting plates;

[0026] The rotating shaft driving part is used to drive the rotating shaft to rotate, so as to drive n mud rakes to rotate synchronously;

[0027] n is an integer greater than or equal to 2.

[0028] The sludge drying device provided in the present application is provided with a plurality of trays arranged in layers along the vertical direction, and a mud rake is provided on each tray accordingly. The sludge to be dried is put onto the tray located on the top layer through the mud feeding port, and then falls onto each tray from top to bottom through the mud dropping port. The sludge remaining on each tray is stirred by the corresponding mud rake, and in this process, the water in the sludge evaporates from the sludge. After n rounds of stirring and stirring operations, the water in the sludge is fully evaporated, thereby achieving a drying effect.

[0029] In addition, during the drying process, air flows into the box through the air inlet pipe, flows upward through each pallet in turn through the ventilation holes on each pallet, and finally flows out of the box through the air outlet pipe, so that the moisture in the stirred sludge on each pallet can evaporate faster and be discharged from the box with the flowing air, ultimately improving the drying efficiency.

[0030] Compared with the traditional heating and drying method, the present application does not need to heat the sludge, thereby reducing energy consumption.

[0031] In some embodiments, a through hole is provided at the center position of the support plate, the rotating shaft passes through the support plate through the through hole, and the mud outlet extends radially from the through hole toward the peripheral side of the support plate; the projections of the mud outlets on the n support plates on the horizontal plane are staggered and evenly arranged along the stirring path of the mud rake.

[0032] By setting the positions of the mud outlets on the n pallets, it is ensured that when the sludge falls from the upper pallet to the lower pallet, it avoids the mud outlet on the lower pallet. In addition, the mud drop position on the lower pallet is set to the rear side of the mud outlet of the lower pallet to prevent the sludge from being pushed into the mud outlet by the mud rake after falling on the lower pallet.

[0033] In some embodiments, the air outlet duct is connected to the exhaust fan. Driven by the exhaust fan, the air enters the box from the air inlet duct, flows through each support plate in turn through the ventilation holes on each support plate, and then flows out of the box through the air outlet duct.

[0034] The air outlet duct is connected to the exhaust fan. When the exhaust fan is started, negative pressure is generated in the box, so that air enters the box from the air inlet duct, flows through each support plate in turn through the ventilation holes on each support plate, and then flows out of the box through the air outlet duct.

[0035] In some embodiments, the pallet is rectangular, and the ventilation holes of all odd-numbered pallets among n pallets are located at the first corner of the pallet, and the ventilation holes of all even-numbered pallets among n pallets are located at the second corner of the pallet, wherein the first corner and the second corner are two opposite corners of the pallet.

[0036] By setting the position of the ventilation holes of each support plate, the air can flow through each support plate in a circuitous manner along a Z-shaped path, so that the air can contact the sludge more fully during the flow process, thereby further improving the drying effect.

[0037] In some embodiments, walking wheels are provided at the bottom of the box.

[0038] By arranging walking wheels at the bottom of the box body, the sludge drying device of the present application can be conveniently moved to the sludge drying position. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the structure of the sludge drying rack in the embodiment of the present application;

[0040] Figure 2 It is a schematic diagram of the structure of the mud rake in the embodiment of the present application;

[0041] Figure 3 It is a schematic diagram of the top view of the structure of each layer of the support plate in the embodiment of the present application;

[0042] Figure 4 It is a schematic diagram of the projection of the mud outlets on each layer of the support plate in the embodiment of the present application on the horizontal plane;

[0043] Figure 5 This is a schematic diagram of the structure of the sludge drying room in the embodiment of the present application;

[0044] Figure 6 It is a schematic diagram of the structure of the sludge drying device in the embodiment of the present application;

[0045] Figure 7 A schematic diagram of the air flow path in the sludge drying device in the embodiment of the present application;

[0046] Figures 1 to 7 Included:

[0047] Rotating shaft 1, rotating shaft driving part 2, supporting plate 3, mud outlet 31, mud guard plate 32, through hole 33, mud rake 4, connecting arm 41, pulling teeth 42, outer cover 5, air inlet 51, air outlet 52, mud inlet bucket 7, air outlet pipe 8, air inlet pipe 9, walking wheel 10, box body 110, mud outlet bucket 120. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0049] Example 1

[0050] like Figure 1As shown, the sludge drying frame in the embodiment of the present application includes a frame (not shown in the figure), a rotating shaft 1, a rotating shaft driving part (not shown in the figure), n supporting plates 3 and n mud rakes 4, wherein:

[0051] N supporting plates 3 are arranged on the frame at intervals along the vertical direction. The supporting plates 3 are used to carry the sludge to be dried, and each supporting plate 3 is provided with a sludge discharge port.

[0052] The rotating shaft 1 is arranged on the frame along the vertical direction and passes through n supporting plates 3 in sequence.

[0053] n mud rakes 4 are installed on the rotating shaft 1 at intervals along the vertical direction and correspond to the supporting plates 3 one by one. The mud rakes 4 are located above the corresponding supporting plates 3 and close to the supporting plates. Figure 2 As shown, the mud rake 4 includes a connecting arm 41 , the middle portion of the connecting arm 41 is fixedly sleeved on the rotating shaft 1 , and a plurality of teeth 42 are arranged at intervals on the connecting arm 41 .

[0054] The shaft driving part is arranged on the frame and is in driving connection with the shaft 1, and is used to drive the shaft to rotate, so as to drive the n mud rakes 4 to rotate synchronously. The shaft driving part can be, for example, a rotary drive motor with a reducer.

[0055] n is an integer greater than or equal to 2, for example, Figure 1 The sludge drying rack includes 6 layers of supporting plates 3 and 6 corresponding mud rakes 4, that is, n is 6.

[0056] The sludge drying rack provided in the embodiment of the present application includes a plurality of support plates 3 arranged in layers along the vertical direction, and a mud rake 4 is correspondingly arranged on each support plate 3 .

[0057] After the sludge to be dried is placed on the uppermost support plate 3, the sludge falls from top to bottom through the mud outlet on the support plate 3 to the support plates 3 below. The sludge on each layer of the support plate 3 is stirred by the corresponding mud rake 4. During this process, the sludge comes into contact with the flowing air in the surrounding environment, and the water in the sludge evaporates from the sludge. In addition, each time the mud rake 4 rotates and passes through the mud outlet, part of the sludge is pushed into the mud outlet, so that the sludge falls on the support plate 3 below.

[0058] After n rounds of stirring, the water in the sludge is fully evaporated, thus achieving the effect of natural drying.

[0059] Compared with the traditional heating and drying method, the sludge drying rack in the embodiment of the present application stirs the sludge to make the sludge dry naturally without heating the sludge, thereby reducing energy consumption.

[0060] During use, the sludge drying rack in the embodiment of the present application can be placed in an outdoor natural environment. During the stirring process, the sludge is exposed to natural wind and sunlight, so that the moisture therein evaporates faster, thereby improving the drying efficiency.

[0061] like Figure 1 As shown, optionally, a mud guard plate 32 is provided on the peripheral side of the support plate 3. By providing the mud guard plate 32 on the peripheral side of the support plate 3, the sludge is restrained and limited, preventing the sludge from sliding off the peripheral side of the support plate 3 when being stirred.

[0062] Optionally, a through hole is provided at the center of the support plate 3 , and the rotating shaft 1 passes through the support plate 3 through the through hole.

[0063] Please refer to Figure 3 to Figure 4 ,in, Figure 3 (a) to (e) in FIG. 1 show top views of the six support plates 3 from top to bottom. Figure 4 The schematic diagram of the projection of the mud outlets 31 of the six support plates 3 on the horizontal plane is shown.

[0064] like Figure 3 to Figure 4 As shown, the mud outlet 31 on each support plate 3 extends radially from the through hole 33 toward the circumference of the support plate 3. The projections of the mud outlets 31 on the six support plates 3 on the horizontal plane are staggered, and along the stirring path ( Figure 4 The dashed circles in the middle are evenly arranged.

[0065] By setting the positions of the mud outlets 31 on the n pallets 3 as above, it is ensured that when the sludge falls from the upper pallet 3 to the lower pallet 3, it avoids the mud outlet 31 on the lower pallet 3. In addition, the mud falling position on the lower pallet 3 is located at the rear side of the mud outlet 31 of the lower pallet 3, so as to prevent the sludge from being pushed into the mud outlet 31 by the mud rake 4 after falling on the lower pallet 3.

[0066] like Figure 3 to Figure 4 As shown, optionally, the mud outlet 31 is fan-shaped, and the width of the mud outlet 31 gradually increases from the through hole 33 toward the peripheral side of the support plate 3. The mud outlet 31 is set to be fan-shaped to prevent the mud rake 4 from getting stuck when passing through the mud outlet 31. Of course, the mud outlet 31 can also be set to a strip structure with equal width.

[0067] Example 2

[0068] like Figure 5 As shown, the sludge drying room in the embodiment of the present application includes an outer cover 5, an air circulation system (not shown in the figure) and a sludge drying rack, and the sludge drying rack is any sludge drying rack in the above-mentioned embodiment 1.

[0069] The sludge drying frame is arranged in the outer cover 5 .

[0070] The air circulation system is used to drive air to circulate between the inner and outer sides of the outer cover 5 .

[0071] By arranging the sludge drying rack in the outer cover 5 and driving the air to circulate between the inner and outer sides of the outer cover through the air circulation system, the water in the stirred sludge on the sludge drying rack can evaporate faster and flow out of the outer cover 5 with the circulating air, thereby improving the drying efficiency.

[0072] Optionally, an air inlet 51 is provided at the bottom of the outer cover 5, and an air outlet 52 is provided at the top of the outer cover 5. Driven by the air circulation system, air flows into the outer cover 5 from the air inlet 51, and finally flows out of the outer cover 5 through the air outlet 52. The sludge drying rack is exposed to the flowing air as a whole, so that the water in the stirred sludge on the sludge drying rack evaporates faster and flows out of the outer cover 5 with the circulating air.

[0073] The air circulation system includes, for example, an exhaust fan connected to the air outlet 52 through a pipeline. The exhaust fan extracts air from the outer cover 5 to generate negative pressure inside the outer cover 5, thereby promoting the air to circulate between the inner and outer sides of the outer cover 5.

[0074] Example 3

[0075] like Figure 6 to Figure 7 As shown, the sludge drying device in the embodiment of the present application includes a box body 110, a rotating shaft 1, a rotating shaft driving unit 2, n supporting plates 3 and n mud rakes 4, wherein:

[0076] The top of the box body 110 is provided with a mud injection port and an air outlet pipe 8 , and the bottom of the box body 110 is provided with an air inlet pipe 9 .

[0077] N supporting plates 3 are installed in the box body 110 at intervals along the vertical direction. The supporting plates 3 are used to carry the sludge to be dried. Each supporting plate 3 is provided with a sludge discharge port and a ventilation hole.

[0078] The lower end of the shaft 1 is rotatably connected to the bottom of the box 110 , and the shaft 1 passes through n support plates 3 in sequence from bottom to top. The upper end of the shaft 1 passes through the box 110 upward and is connected to the shaft driving unit 2 installed on the top of the box 110 .

[0079] N mud rakes 4 are installed on the rotating shaft 1 at intervals along the vertical direction and correspond to the supporting plates 3 one by one. The mud rakes 4 are located above the corresponding supporting plates 3 and close to the supporting plates 3. As described in the above embodiment 1, the mud rake 4 includes a connecting arm 41, the middle part of which is fixedly sleeved on the rotating shaft 1, and a plurality of teeth 42 are provided on the connecting arm 41.

[0080] The shaft driving unit 2 is used to drive the shaft 1 to rotate, so as to drive the n mud rakes 4 to rotate synchronously. The shaft driving unit 2 can be, for example, a rotary drive motor with a reducer.

[0081] As in the above embodiment 1, n is an integer greater than or equal to 2, for example Figure 6 and Figure 7 The sludge drying rack includes 6 layers of supporting plates 3 and 6 corresponding mud rakes 4, that is, n is 6.

[0082] The sludge drying device provided in the embodiment of the present application is provided with a plurality of trays 3 arranged in layers in the vertical direction, and a mud rake 4 is provided on each tray 3. After the sludge to be dried is put into the tray 3 located at the top layer through the mud throwing port, it falls onto each tray 3 from top to bottom through the mud dropping port. The sludge remaining on each layer of tray 3 is stirred by the corresponding mud rake 4. During this process, the sludge comes into contact with the air, and the water therein evaporates from the sludge. In addition, each time the mud rake 4 rotates and passes through the mud dropping port, part of the sludge is pushed into the mud dropping port, so that the sludge falls onto the tray 3 below.

[0083] After n rounds of stirring, the water in the sludge is fully evaporated, thus achieving a drying effect.

[0084] In addition, during the drying process, air flows into the box 110 through the air inlet pipe 9, and flows upward through each support plate 3 in turn through the ventilation holes on each support plate 3, and finally flows out of the box 110 through the air outlet pipe 8, so that the moisture in the stirred sludge on each support plate 3 can evaporate faster and be discharged from the box 110 with the flowing air, thereby finally improving the drying efficiency.

[0085] Compared with the traditional heating and drying method, the sludge drying device of the embodiment of the present application dries the sludge by stirring and flattening the sludge, without heating the sludge, thereby reducing energy consumption.

[0086] As in the above embodiment 1, optionally, a through hole is provided at the center of the support plate 3, and the rotating shaft 1 passes through the support plate 3 through the through hole. The mud outlet 31 on each support plate 3 extends radially from the through hole toward the peripheral side of the support plate 3. The projections of the mud outlets 31 on the n support plates 3 on the horizontal plane are staggered and evenly arranged along the stirring path of the mud rake 4.

[0087] By setting the positions of the mud outlets 31 on the n pallets 3 as above, it is ensured that when the sludge falls from the upper pallet 3 to the lower pallet 3, it avoids the mud outlet 31 on the lower pallet 3. In addition, the mud falling position on the lower pallet 3 is located at the rear side of the mud outlet 31 of the lower pallet 3, so as to prevent the sludge from being pushed into the mud outlet 31 by the mud rake 4 after falling on the lower pallet 3.

[0088] like Figure 7As shown, the air outlet pipe 8 is optionally connected to the exhaust fan. When the exhaust fan is started, negative pressure is generated in the box body 110, so that air enters the box body 110 from the air inlet pipe 9, flows through each support plate 3 in sequence through the ventilation holes on each support plate 3, and then flows out of the box body 110 through the air outlet pipe 8.

[0089] Optionally, the pallet 3 is rectangular, and counting from bottom to top, the ventilation holes of all odd-numbered pallets 3 among n pallets 3 are located at the first corner of the pallet 3, and the ventilation holes of all even-numbered pallets among n pallets 3 are located at the second corner of the pallet 3, wherein the first corner and the second corner are two opposite corners of the pallet 3.

[0090] By arranging the position of the ventilation holes of each support plate 3 in this way, the air can flow through each support plate 3 in a circuitous manner along a Z-shaped path, so that the air can contact the sludge more fully during the flow, thereby further improving the sludge drying effect.

[0091] Continue to refer Figure 7 As shown, optionally, the sludge drying device in the embodiment of the present application further includes a mud inlet hopper 7 arranged at the mud inlet, and the mud inlet hopper 7 is arranged at the mud inlet, and the sludge to be dried falls into the uppermost support plate 3 through the mud inlet hopper 7.

[0092] Optionally, a mud discharge hopper 120 is provided on the bottom of the box body 110 (ie, the bottommost support plate 3 ), and the sludge on the bottommost support plate 3 that has completed the drying process falls into the mud discharge hopper 120 through the mud discharge port 31 thereon.

[0093] Optionally, in order to facilitate the movement of the sludge drying device to the sludge drying station, walking wheels 10 are provided at the bottom of the box body 110 .

[0094] The present application is described in sufficient detail above with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, rather than by the above description in the embodiments.

Claims

1. A sludge drying rack, characterized in that: The sludge drying frame includes a frame, a rotating shaft, a rotating shaft driving unit, n supporting plates and n mud rakes, wherein: n supporting plates are arranged on the frame at intervals in the vertical direction, the supporting plates are used to carry the sludge to be dried, and each of the supporting plates is provided with a sludge outlet; The rotating shaft is arranged on the frame along the vertical direction and passes through the n supporting plates in sequence; n mud rakes are installed on the rotating shaft at intervals along the vertical direction and correspond to the supporting plates one by one, and the mud rakes are located above the corresponding supporting plates and close to the supporting plates; The rotating shaft driving part is in driving connection with the rotating shaft, and the rotating shaft driving part is used to drive the rotating shaft to rotate, so as to drive the n mud rakes to rotate synchronously; n is an integer greater than or equal to 2.

2. The sludge drying rack according to claim 1, characterized in that: A mud guard plate is arranged on the peripheral side of the support plate.

3. The sludge drying rack according to claim 1, characterized in that: A through hole is provided at the center of the support plate, the rotating shaft passes through the support plate through the through hole, and the mud outlet extends radially from the through hole toward the peripheral side of the support plate; The projections of the mud outlets of the n supporting plates on the horizontal plane are staggered and evenly arranged along the stirring path of the mud rake.

4. The sludge drying rack according to claim 3, characterized in that: The mud outlet is fan-shaped, and the width of the mud outlet gradually increases from the through hole toward the peripheral side of the supporting plate.

5. A sludge drying room, characterized in that: The sludge drying room comprises an outer cover, an air circulation system and a sludge drying rack as claimed in any one of claims 1 to 4, wherein: The sludge drying rack is arranged in the outer cover; The air circulation system is used to drive air to circulate between the inner and outer sides of the outer cover.

6. A sludge drying device, characterized in that: The sludge drying device comprises a box body, a rotating shaft, a rotating shaft driving unit, n supporting plates and n mud rakes, wherein: The top of the box is provided with a mud injection port and an air outlet pipe, and the bottom of the box is provided with an air inlet pipe; n supporting plates are installed in the box body at intervals along the vertical direction, the supporting plates are used to carry the sludge to be dried, and each of the supporting plates is provided with a sludge outlet and a ventilation hole; The lower end of the rotating shaft is rotatably connected to the bottom of the box body, the rotating shaft passes through the n supporting plates in sequence from bottom to top, and the upper end of the rotating shaft passes through the box body upward and is connected to the rotating shaft driving part installed on the top of the box body; n mud rakes are installed on the rotating shaft at intervals along the vertical direction and correspond to the supporting plates one by one, and the mud rakes are located above the corresponding supporting plates and close to the supporting plates; The rotating shaft driving part is used to drive the rotating shaft to rotate, so as to drive the n mud rakes to rotate synchronously; n is an integer greater than or equal to 2.

7. The sludge drying device according to claim 6, characterized in that: A through hole is provided at the center of the support plate, the rotating shaft passes through the support plate through the through hole, and the mud outlet extends radially from the through hole toward the peripheral side of the support plate; The projections of the mud outlets of the n supporting plates on the horizontal plane are staggered and evenly arranged along the stirring path of the mud rake.

8. The sludge drying device according to claim 6, characterized in that: The air outlet pipe is connected to the exhaust fan. Driven by the exhaust fan, air enters the box from the air inlet pipe, flows through each of the support plates in sequence through the ventilation holes on each of the support plates, and then flows out of the box through the air outlet pipe.

9. The sludge drying device according to claim 6, characterized in that: The pallet is rectangular, and the ventilation holes of all odd-numbered pallets among the n pallets are located at the first corner of the pallet, and the ventilation holes of all even-numbered pallets among the n pallets are located at the second corner of the pallet, wherein the first corner and the second corner are two opposite corners of the pallet.

10. The sludge drying device according to claim 6, characterized in that: The bottom of the box is provided with walking wheels.

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