CN113522949A

CN113522949A - Soil remediation equipment

Info

Publication number: CN113522949A
Application number: CN202110867790.3A
Authority: CN
Inventors: 刘江
Original assignee: Suzhou Sencai Greening Co ltd
Current assignee: Suzhou Sencai Greening Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-10-22

Abstract

The application relates to the field of soil remediation, in particular to soil remediation equipment which comprises a first rack, wherein a remediation cylinder is arranged on the first rack, a stirring pipe penetrates through the remediation cylinder, a plurality of liquid inlet holes in the remediation cylinder are formed in the stirring pipe, and a stirring paddle in the remediation cylinder is arranged on the stirring pipe; a liquid discharging box is arranged on the first frame, a first water pump is connected to the liquid discharging box, and a communicating component communicated with the stirring pipe is arranged on the first water pump; and the first frame is also provided with a driving assembly for driving the stirring pipe to rotate. A restoration section of thick bamboo in this application is used for splendid attire soil, and soil is overturn by the stirring rake in a restoration section of thick bamboo, and the in-process of upset can mix with the water that enters into in the restoration section of thick bamboo, and soil restoration liquid can enter into in the restoration section of thick bamboo simultaneously and mix with soil to can accelerate the mixing efficiency of soil restoration liquid and soil, and then can strengthen the restoration speed of soil.

Description

Soil remediation equipment

Technical Field

The application relates to the field of soil remediation, in particular to soil remediation equipment.

Background

The soil is a loose surface layer which has fertility and can grow plants on the surface of the land, and the soil can provide mechanical support capability for the growth of the plants and can provide water, fertilizer, gas, heat and other fertility factors required by the growth and development of the plants. As the population is rapidly increased and the industry is rapidly developed, solid wastes are continuously stacked and dumped on the surface of soil, harmful waste water continuously permeates into the soil, and harmful gas and floating dust in the atmosphere continuously fall into the soil along with rainwater, so that the soil pollution is caused.

In order to restore the normal functions of soil, people can restore the soil, and the current restoration methods can be roughly divided into three restoration modes, namely physical, chemical and biological. The chemical remediation is to add some soil remediation liquid into the soil, and the soil remediation liquid reacts with harmful substances in the soil, so that the effect of soil remediation is achieved. In the related art, the soil remediation liquid is sprayed on the soil, and then permeates into the lower layer of the soil, the soil remediation liquid is fully contacted with harmful substances in the soil in the permeation process, and reacts with the harmful substances in the contact process, but the permeation time is too long, and further improvement is needed.

Disclosure of Invention

In order to reduce the time required for soil remediation, the application provides a soil remediation device.

The application provides a soil remediation equipment adopts following technical scheme:

a soil remediation device comprises a first rack, wherein a remediation cylinder is arranged on the first rack, a stirring pipe penetrates through the remediation cylinder, a plurality of liquid inlet holes located in the remediation cylinder are formed in the stirring pipe, and a stirring paddle located in the remediation cylinder is arranged on the stirring pipe; a liquid discharging box is arranged on the first frame, a first water pump is connected to the liquid discharging box, and a communicating component communicated with the stirring pipe is arranged on the first water pump; and the first frame is also provided with a driving assembly for driving the stirring pipe to rotate.

Through adopting above-mentioned technical scheme, restoreing a section of thick bamboo and being used for splendid attire soil, soil enters into and restores a section of thick bamboo after, and the stirring rake can drive the soil upset, and in soil restoration liquid in the drainage box entered into the agitator pipe through the intercommunication subassembly under the drive of first water pump simultaneously, the rethread feed liquor hole entered into restore a section of thick bamboo and soil intensive mixing to can improve soil restoration efficiency.

Optionally, the communicating component comprises a liquid inlet pipe connected to the first water pump, the stirring pipe penetrates through the liquid inlet pipe, and a liquid inlet located in the liquid inlet pipe is formed in the stirring pipe.

Through adopting above-mentioned technical scheme, soil restoration liquid in the feed liquor pipe passes through the inlet and enters into the agitator pipe, and the agitator pipe can take place relative rotation with the feed liquor pipe simultaneously.

Optionally, the driving assembly comprises a supporting plate arranged on the first frame, the stirring pipe is arranged on the supporting plate in a penetrating mode, a mounting plate is arranged on the supporting plate, a first motor is arranged on the mounting plate, and an output shaft of the first motor is connected to the stirring pipe.

Through adopting above-mentioned technical scheme, backup pad and mounting panel play the effect of support to first motor, and during first motor operation, first motor drives the agitator pipe and rotates, and the agitator pipe drives the stirring rake and overturns the soil in restoreing a section of thick bamboo.

Optionally, a water tank is arranged on the rack, the water tank is communicated with a second water pump, the second water pump is communicated with a water inlet pipe, and the water inlet pipe is communicated with the repairing cylinder.

Through adopting above-mentioned technical scheme, the second water pump can be with the water pump of water tank in going into the restoration section of thick bamboo, soil can mix with water when the upset to can strengthen the water content of soil, and then strengthen the distribution degree of consistency of soil remediation liquid in soil.

Optionally, one side of first frame is equipped with the second frame, be equipped with reation kettle in the second frame, it has first connecting pipe to communicate on the restoration section of thick bamboo, first connecting pipe communicates in reation kettle, wear to be equipped with a plurality of (mixing) shafts on reation kettle's the lateral wall, be equipped with the stirring leaf on the (mixing) shaft, be equipped with drive (mixing) shaft rotation second motor on reation kettle's the outer wall.

Through adopting above-mentioned technical scheme, in entering into reation kettle through first connecting pipe behind the soil doping soil repair liquid in the restoration section of thick bamboo, second motor drive (mixing) shaft and stirring leaf rotate, and the stirring leaf drives soil and the upset of soil repair liquid that is located reation kettle for harmful substance in the soil can fully react with soil repair liquid, thereby can further strengthen the restoration speed of soil.

Optionally, a pressure plate is arranged in the reaction kettle, a plurality of water permeable holes are formed in the pressure plate, a plurality of guide rods penetrate through the top wall of the reaction kettle, the top ends of the guide rods are commonly connected with a push plate, and the reaction kettle is further provided with a cylinder with an output shaft connected to the push plate; the liquid outlet pipe is arranged on the top wall of the reaction kettle in a penetrating mode, the bottom end of the liquid outlet pipe is connected to the pressing plate, a liquid suction port located above the pressing plate is formed in the liquid outlet pipe, and the liquid outlet pipe is further communicated with a water suction pump.

Through adopting above-mentioned technical scheme, the axial displacement of guide bar is followed to the cylinder drive push pedal, when the push pedal moves downwards, drive the axial displacement of clamp plate along the guide bar, the soil in the reation kettle is pressed to the clamp plate, partial moisture in the soil passes the top that the hole entered into the clamp plate of permeating water under the pressure of clamp plate, and leave reation kettle through imbibition mouth and drain pipe, thereby can reduce the water content of soil, the reactant that the soil remediation liquid of dissolving in the aquatic simultaneously and harmful substance generated can leave soil along with water.

Optionally, the second frame is further provided with a filter box, the suction pump is connected with a water outlet pipe, the water outlet pipe is communicated with the filter box, the inner wall of the filter box is provided with a filter plate, the filter plate is provided with filter cloth, the filter cloth is provided with a fine sand layer, the fine sand layer is provided with a gravel layer, and the filter box is further provided with a recovery pipe below the filter plate in a penetrating manner.

Through adopting above-mentioned technical scheme, the water that enters into in the drain pipe enters into the rose box along the drain pipe, and the water in the drain pipe contains a large amount of earth, and water passes rubble layer, fine sand bed and filter and flows out from the recovery tube, and water is when passing the rose box, and the rose box can purify and filter water to make water be convenient for retrieve more.

Optionally, a cleaning opening is formed in the side wall of the filter box, and a lifting door used for plugging the cleaning opening is arranged on the filter box.

Through adopting above-mentioned technical scheme, the back is opened to the overhead door, can clear up the earth of accumulation in the rose box through the clearance mouth to can change fine sand and rubble.

Optionally, a third frame is arranged on one side of the second frame, a drying box is arranged on the third frame, a second connecting pipe is connected to the bottom of the reaction kettle, the second connecting pipe is connected to the drying box, a pump is further connected to the second connecting pipe, blowing pipes are arranged on two opposite sides of the drying box in a penetrating mode, and a hot air box is connected to one blowing pipe.

Through adopting above-mentioned technical scheme, in the soil extraction stoving incasement of pump machine in with reation kettle, the stoving bellows was bloied in to the stoving case through the blowing pipe to can further reduce the water content of soil, make soil can be used again more fast.

Optionally, a mud dispersing plate is arranged in the dryer, and a plurality of mud dispersing holes are formed in the mud dispersing plate.

Through adopting above-mentioned technical scheme, can disperse when the higher soil of water content passes the scattered mud hole to the moisture evaporation in the soil is easier when the wind on the air heater blows to soil.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the soil remediation cylinder is used for containing soil, the soil is turned over by the stirring paddle in the remediation cylinder, and the soil remediation liquid can enter the remediation cylinder to be mixed with the water entering the remediation cylinder in the turning process, and meanwhile, the soil remediation liquid can enter the remediation cylinder to be mixed with the soil, so that the mixing efficiency of the soil remediation liquid and the soil can be improved, and the remediation speed of the soil can be further improved;

2. this application has added a large amount of water in repairing a section of thick bamboo, and water and soil mix the mud that becomes to the reaction rate of harmful substance in soil repair liquid and the soil has further been strengthened.

Drawings

FIG. 1 is a schematic diagram of the general structure of a soil remediation device according to an embodiment of the present application.

FIG. 2 is a cross-sectional view of a prosthetic cartridge according to an embodiment of the present application.

FIG. 3 is a sectional view of a reaction vessel according to an example of the present application.

Fig. 4 is a cross-sectional view of a filtration tank of an embodiment of the present application.

Fig. 5 is a sectional view of a drying box according to an embodiment of the present application.

Description of reference numerals: 1. a first frame; 2. a repair cartridge; 3. a stirring pipe; 4. a support plate; 5. mounting a plate; 6. a first motor; 7. a feed inlet; 8. a first connecting pipe; 9. a water tank; 10. a second water pump; 11. a water inlet pipe; 12. a liquid discharging box; 13. a first water pump; 14. a liquid inlet pipe; 15. a liquid inlet; 16. a second frame; 17. a reaction kettle; 18. a second connecting pipe; 19. a stirring shaft; 20. a second motor; 21. stirring blades; 22. a guide bar; 23. pushing the plate; 24. pressing a plate; 25. water permeable holes; 26. a cylinder; 27. a liquid outlet pipe; 28. a liquid suction port; 29. a filter box; 30. a water pump; 31. a water outlet pipe; 32. cleaning the opening; 33. a lift gate; 34. a filter plate; 35. a filter cloth; 36. a fine sand layer; 37. a crushed stone layer; 38. a recovery pipe; 39. a third frame; 40. a drying box; 41. a pump machine; 42. a mud dispersing plate; 43. mud dispersing holes; 44. a blowpipe; 45. a hot air box; 46. a discharge port; 47. a liquid inlet hole; 48. and (4) a stirring paddle.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses soil remediation equipment. Referring to fig. 1 and 2, a soil remediation equipment includes first frame 1, is equipped with a restoration section of thick bamboo 2 on the first frame 1, and the axial of a restoration section of thick bamboo 2 of going up along the restoration section of thick bamboo 2 is worn to be equipped with stirred tubular 3, and stirred tubular 3 is the hollow tube, and the both ends shutoff of stirred tubular 3 still is equipped with drive stirring pipe 3 pivoted drive assembly on the first frame 1. Drive assembly is including locating backup pad 4 in the frame, and the one end of stirred tube 3 passes backup pad 4 and can take place relative rotation with backup pad 4, still is equipped with mounting panel 5 in backup pad 4, is equipped with first motor 6 on the mounting panel 5, and first motor 6's output shaft and stirred tube 3 coaxial coupling, first motor 6 drive stirred tube 3 and rotate. Wear to be equipped with feed inlet 7 that is close to backup pad 4 setting on restoreing a section of thick bamboo 2, still the intercommunication has first connecting pipe 8 on restoreing a section of thick bamboo 2, and first connecting pipe 8 sets up and is being equipped with the stirring rake 48 that is located restoreing a section of thick bamboo 2 on restoreing a section of thick bamboo 2 and keeping away from the stirring pipe 3, and soil enters into from feed inlet 7 and restores a section of thick bamboo 2 to leave through first connecting pipe 8 under the drive of stirring rake 48 and restore a section of thick bamboo 2.

Still be equipped with water tank 9 on the first frame 1, intercommunication second water pump 10 on the water tank 9, be connected with inlet tube 11 on the second water pump 10, the one end that second water pump 10 was kept away from to inlet tube 11 is connected in a restoration section of thick bamboo 2, and soil removes and when the upset in a restoration section of thick bamboo 2, the water in the water tank 9 enters into a restoration section of thick bamboo 2, and water and soil mix and become mud. Still be equipped with on the first frame 1 and put liquid case 12, put the intercommunication on the liquid case 12 and have first water pump 13, be equipped with the intercommunication subassembly that communicates in the agitator tube 3 on first water pump 13. The communicating component comprises a liquid inlet pipe 14, one end of the liquid inlet pipe 14 is communicated with the stirring pipe 3, one end of the liquid inlet pipe 14 is connected to the first water pump 13, and the other end of the liquid inlet pipe is plugged. The stirring pipe 3 passes through the liquid inlet pipe 14 and the stirring pipe 3 can rotate relative to the liquid inlet pipe 14, and the stirring pipe 3 is provided with a plurality of liquid inlets 15 which are positioned in the liquid inlet pipe 14, so that the soil remediation liquid in the liquid discharge box 12 enters the stirring pipe 3 through the liquid inlet pipe 14 in the first water pump 13. Still set up a plurality of feed liquor holes 47 that are located a restoration section of thick bamboo 2 on the lateral wall of agitator tube 3, soil restoration liquid in the agitator tube 3 enters into a restoration section of thick bamboo 2 and mixes with the mud in a restoration section of thick bamboo 2 through feed liquor hole 47, and feed liquor hole 47 has seted up a plurality ofly on agitator tube 3, stirring rake 48 drives the upset of mud and removes, thereby can strengthen mixing effect of soil restoration liquid and soil, and then can improve the reaction rate of the harmful substance in soil restoration liquid and the soil.

Referring to fig. 1 and 3, a second frame 16 is disposed on one side of the first frame 1, a reaction kettle 17 is disposed on the second frame 16, and a second connecting pipe 18 is connected to the bottom wall of the second reaction kettle 17. The first connecting pipe 8 is connected to the side wall of the reaction kettle 17, and the slurry in the repair cylinder 2 enters the reaction kettle 17 through the first connecting pipe 8. Wear to be equipped with a plurality of (mixing) shafts 19 on reation kettle 17's the lateral wall, still be equipped with drive (mixing) shaft 19 pivoted second motor 20 on reation kettle 17's the outer wall, be equipped with the stirring leaf 21 that is located reation kettle 17 on the (mixing) shaft 19, behind mud and the soil restoration liquid entering into reation kettle 17, second motor 20 drive stirring leaf 21 rotates to make the harmful mass energy in the mud can take place abundant reaction with soil restoration liquid. A plurality of guide bars 22 are worn to be equipped with along reation kettle 17's axial by reation kettle 17's roof, guide bar 22 can with reation kettle 17 reaction relative slip, a push pedal 23 is equipped with jointly on a plurality of guide bars 22's the top, a plurality of clamp plates 24 are equipped with jointly in a plurality of guide bar 22's bottom, a plurality of holes 25 of permeating water have been seted up on the clamp plate 24, reation kettle 17's top still is equipped with and is located reation kettle 17 outer cylinder 26, cylinder 26's output shaft is in push pedal 23. The air cylinder 26 drives the push plate 23 and the guide rod 22 to move along the axial direction of the guide rod 22, so that the press plate 24 can be driven to move along the axial direction of the reaction kettle 17, the press plate 24 can press the slurry in the reaction kettle 17, and partial water in the slurry after the slurry is pressed can pass through the water permeable holes 25 and enter the upper part of the press plate 24. Still wear to be equipped with drain pipe 27 on reation kettle 17's the roof, drain pipe 27's bottom fixed connection is in clamp plate 24, drain pipe 27 can follow reation kettle 17's axial lift at clamp plate 24's drive, still set up the imbibition mouth 28 that is close to clamp plate 24 on drain pipe 27's the lateral wall, the water of clamp plate 24 top enters into in drain pipe 27 through imbibition mouth 28, and outside discharging reation kettle 17 through drain pipe 27, thereby can reduce the water content of mud, and then make soil can be recycled sooner.

Referring to fig. 4, a filter box 29 is further disposed on the second frame 16, a water pump 30 is connected to the filter box 29, a water outlet pipe 31 is connected to the water pump 30, the water outlet pipe 31 is connected to the water outlet pipe 27, and the water pump 30 pumps water above the pressure plate 24 into the filter box 29. A cleaning opening 32 is formed in the side wall of the filter box 29, a lifting door 33 used for plugging the cleaning opening 32 is further arranged on the side wall of the filter box 29, and silt accumulated in the filter box 29 can be cleaned by opening the lifting door 33. The inner wall of the filter box 29 is also provided with a filter plate 34, the filter plate 34 is paved with filter cloth 35, the filter cloth 35 is paved with a fine sand layer 36, the fine sand layer 3 is paved with a gravel layer 37, water entering the filter box 29 can sequentially pass through the gravel layer 37, the fine sand layer 36, the filter cloth 35 and the filter plate 34, and therefore soil in the water can be filtered out. A recovery pipe 38 is further connected to the filter tank 29 below the filter plate 34, and the filtered water is discharged from the filter tank 29 through the recovery pipe 38, thereby facilitating recovery treatment of the water.

Referring to fig. 1 and 5, a third frame 39 is disposed on one side of the second frame 16, a drying box 40 is disposed on the third frame 39, the second connecting pipe 18 is connected to the drying box 40, a pump 41 is further disposed on the second connecting pipe 18, and the pump 41 pumps the slurry of the soil in the reaction kettle 17 into the drying box 40. The inner wall of the drying box 40 is provided with a mud dispersing plate 42, the center of the mud dispersing plate 42 is arranged in a downward inclined manner, and the mud dispersing plate 42 is also provided with a plurality of mud dispersing holes 43. The slurry pumped by the pump 41 enters the mud dispersing plate 42 and passes through the mud dispersing holes 43 to enter below the mud dispersing plate 42. The two opposite side walls of the drying box 40 are communicated with air blowing pipes 44, and the air blowing pipes 44 are positioned below the mud dispersing plate 42. The third frame 39 is further provided with a hot air box 45 located at one side of the drying box 40, the hot air box 45 includes a fan and an electric heating wire, and the hot air box 45 is communicated with one of the blowing pipes 44. The hot-blast case 45 provides the hot-blast for the blowing pipe 44, and the hot-blast blows to on the mud that passes scattered mud board 42 to make the quick evaporation of moisture in the mud, further reduced the moisture content of mud, make mud become the soil that the moisture content is lower, the soil of being convenient for is recycled. The bottom of the drying box 40 is also provided with a discharge hole 46, and the soil dried by the discharge hole 46 passes through the discharge hole 46 to leave the drying box 40.

The implementation principle of the soil remediation equipment in the embodiment of the application is as follows: the soil enters the restoration box to be mixed with water and the soil restoration liquid to form slurry, the slurry enters the reaction kettle 17 under the driving of the stirring paddle 48, and the soil restoration liquid and harmful substances in the soil fully react under the overturning of the stirring blades 21. After the reaction is finished, the pressing plate 24 presses the slurry, preliminary water removal can be performed on the slurry, and the filter box 29 can filter and recover the preliminarily removed water. The pump 41 pumps the primarily dewatered slurry into the drying box 40, and the drying box 40 further dewaters the slurry, so that the slurry becomes soil with a low water content, and the soil can be quickly reused.

Compared with the prior art, a restoration section of thick bamboo 2 in this application embodiment is used for splendid attire soil, and soil is overturn by stirring rake 48 in a restoration section of thick bamboo 2, and the in-process of upset can mix with the water that enters into a restoration section of thick bamboo 2, and soil restoration liquid can enter into a restoration section of thick bamboo 2 simultaneously and mix with soil to can accelerate the mixing efficiency of soil restoration liquid and soil, and then can strengthen the restoration speed of soil.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A soil remediation device, characterized by: the device comprises a first rack (1), wherein a repairing cylinder (2) is arranged on the first rack (1), a stirring pipe (3) penetrates through the repairing cylinder (2), a plurality of liquid inlet holes (47) located in the repairing cylinder (2) are formed in the stirring pipe (3), and a stirring paddle (48) located in the repairing cylinder (2) is arranged on the stirring pipe (3); a liquid discharging box (12) is arranged on the first rack (1), a first water pump (13) is connected to the liquid discharging box (12), and a communicating component communicated with the stirring pipe (3) is arranged on the first water pump (13); and the first frame (1) is also provided with a driving component for driving the stirring pipe (3) to rotate.

2. A soil remediation device according to claim 1, wherein: the communicating component comprises a liquid inlet pipe (14) connected to the first water pump (13), the stirring pipe (3) penetrates through the liquid inlet pipe (14), and a liquid inlet (15) located in the liquid inlet pipe (14) is formed in the stirring pipe (3).

3. A soil remediation device according to claim 1, wherein: drive assembly is including locating backup pad (4) on first frame (1), agitator tube (3) are worn to establish on backup pad (4), be equipped with mounting panel (5) on backup pad (4), be equipped with first motor (6) on mounting panel (5), the output shaft of first motor (6) is in agitator tube (3).

4. A soil remediation device according to claim 1, wherein: the water-saving repairing device is characterized in that a water tank (9) is arranged on the rack, the water tank (9) is communicated with a second water pump (10), the second water pump (10) is communicated with a water inlet pipe (11), and the water inlet pipe (11) is communicated with the repairing cylinder (2).

5. A soil remediation device according to claim 1, wherein: one side of first frame (1) is equipped with second frame (16), be equipped with reation kettle (17) on second frame (16), the intercommunication has first connecting pipe (8) on restoreing a section of thick bamboo (2), first connecting pipe (8) communicate in reation kettle (17), wear to be equipped with a plurality of (mixing) shafts (19) on the lateral wall of reation kettle (17), be equipped with stirring leaf (21) on (mixing) shaft (19), be equipped with drive (mixing) shaft (19) on the outer wall of reation kettle (17) and rotate second motor (20).

6. A soil remediation device according to claim 5, wherein: a pressing plate (24) is arranged in the reaction kettle (17), a plurality of water permeable holes (25) are formed in the pressing plate (24), a plurality of guide rods (22) penetrate through the top wall of the reaction kettle (17), the top ends of the guide rods (22) are connected with a push plate (23) together, and an air cylinder (26) with an output shaft connected to the push plate (23) is further arranged on the reaction kettle (17); drain pipe (27) wear to be equipped with on the roof of reation kettle (17), the bottom of drain pipe (27) is connected in clamp plate (24), set up on drain pipe (27) and be located liquid sucking mouth (28) of clamp plate (24) top, still communicate water pump (30) on drain pipe (27).

7. A soil remediation device according to claim 6, wherein: still be equipped with rose box (29) on second frame (16), be connected with outlet pipe (31) on suction pump (30), outlet pipe (31) communicate in rose box (29), be equipped with filter (34) on the inner wall of rose box (29), be equipped with filter cloth (35) on filter (34), be equipped with fine sand layer (36) on filter cloth (35), be equipped with gravel layer (37) on fine sand layer (36), still wear to be equipped with recovery tube (38) that are located filter (34) below on rose box (29).

8. A soil remediation device according to claim 7, wherein: a cleaning opening (32) is formed in the side wall of the filter box (29), and a lifting door (33) used for plugging the cleaning opening (32) is arranged on the filter box (29).

9. A soil remediation device according to claim 5, wherein: one side of second frame (16) is equipped with third frame (39), be equipped with stoving case (40) on third frame (39), the bottom of reation kettle (17) is connected with second connecting pipe (18), second connecting pipe (18) are connected in stoving case (40), still be connected with pump machine (41) on second connecting pipe (18), all wear to be equipped with blowing pipe (44) on the relative both sides of stoving case (40), be connected with hot-blast box (45) on one of them blowing pipe (44).

10. A soil remediation device according to claim 9, wherein: a mud dispersing plate (42) is arranged in the dryer, and a plurality of mud dispersing holes (43) are formed in the mud dispersing plate (42) in an open view.