A sludge drying device based on capillary principle

Abstract

The present invention provides a sludge drying device based on the capillary principle, and relates to the technical field of sludge drying equipment, including a drying box, a conveying mechanism is provided in the drying box, and a feed port and a discharge port are provided at both ends of the drying box respectively; and a feeding mechanism is provided at one end close to the feed port, and a receiving mechanism is provided at one end close to the discharge port, and a pressing mechanism located above the conveying mechanism is also provided in the drying box; the conveying mechanism includes conveying rollers corresponding to the feed port and the discharge port, and two conveying rollers are provided with steel wire meshes with closed-loop motion on the outer jackets, and the outer surface of the steel wire mesh is wound with a lower layer of hydrophilic gauze that fits with it and moves synchronously with it; an upper layer of hydrophilic gauze is provided above the steel wire mesh, and the upper layer of hydrophilic gauze is connected to a laying mechanism for rolling or laying it, and the upper layer of hydrophilic gauze completely covers the upper surface of the steel wire mesh after laying, and its area is greater than the area of ​​the upper surface of the steel wire mesh. The present invention can improve the sludge drying efficiency, improve the sludge drying effect, and avoid dust on the surface after the sludge is dried.

Description

Technical Field

[0001] The invention relates to the technical field of sludge drying equipment, and in particular to a sludge drying device based on the capillary principle. Background Art

[0002] Sludge drying is a process that uses artificial or natural heat sources to heat wet sludge to evaporate the water in the sludge, thereby achieving deep dehydration of the sludge. In the sludge drying process, the sludge is mostly fed into an extruder to squeeze the sludge into sheets, and then sent to the dryer through a conveyor belt for drying. However, when the sheet sludge is transported on the conveyor belt, only the outer surface of the sludge is exposed to the air for drying, the drying efficiency is low, and the air permeability of the sludge is poor, which easily affects the sludge drying effect and the uniformity of the drying of the sludge. In addition, when the soil on the outer surface of the sludge is dry after drying, it is easy to form flying dust under the action of hot air, especially when the sludge is mixed with special substances such as paint. After the flying dust is inhaled by the staff, it will cause great harm to their health. Summary of the invention

[0003] The object of the present invention is to provide a sludge drying device based on the capillary principle, which can improve the sludge drying efficiency, improve the sludge drying effect, and avoid the flying of dust on the surface of the sludge after drying.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A sludge drying device based on the capillary principle comprises a drying box, wherein a conveying mechanism is arranged along the length direction of the drying box, a feeding port matched with the conveying mechanism is arranged at one end of the drying box close to the feeding of the conveying mechanism, and a discharging port matched with the conveying mechanism is arranged at one end of the drying box close to the discharging of the conveying mechanism; a loading mechanism is arranged at one end of the drying box close to the feeding port, a receiving mechanism is arranged at one end of the drying box close to the discharging port, and a pressing mechanism located above the conveying mechanism is also arranged in the drying box; the conveying mechanism comprises conveying rollers arranged horizontally along the width direction of the drying box and corresponding to the feeding port and the discharging port respectively, two of the conveying rollers are positioned and rotatably installed in the drying box, and the outer shells of the two conveying rollers are provided with steel wire meshes moving in a closed loop, and the outer surface of the steel wire mesh is wound with a lower layer of hydrophilic gauze which is in contact with the steel wire mesh and moves synchronously with the steel wire mesh; an upper layer of hydrophilic gauze is arranged above the steel wire mesh, and the upper layer of hydrophilic gauze is connected to a laying mechanism for rolling or laying it, and the upper layer of hydrophilic gauze completely covers the upper surface of the steel wire mesh after laying, and its area is larger than the area of ​​the upper surface of the steel wire mesh.

[0006] By adopting the above technical scheme, the feeding mechanism lays the sludge to be dried in a sheet form from the feed port onto the wire mesh, and the lower hydrophilic gauze contacts the lower surface of the sludge sheet. After the sludge sheet all enters the drying box, the laying mechanism lays the lower hydrophilic gauze, and lays the lower hydrophilic gauze on the upper surface of the sludge sheet, and then the drying box dries the sludge sheet. During the drying process, the lower hydrophilic gauze and the upper hydrophilic gauze contact the upper surface and the lower surface of the sludge sheet respectively, under the capillary action, the moisture in the sludge sheet is sucked away by the lower hydrophilic gauze and the upper hydrophilic gauze through the capillary action, and quickly penetrates and spreads around the gauze under the capillary action, under the action of hot air, the lower hydrophilic gauze and the upper hydrophilic gauze are quickly air-dried, and continue to absorb and disperse the moisture of the sludge sheet, so repeatedly, so that the lower hydrophilic gauze and the upper hydrophilic gauze are used to increase the water storage area through the capillary phenomenon, and the drying efficiency of the sludge sheet is effectively improved. During this process, the pressing mechanism forms several pits on the surface of the sludge sheet, increasing the contact area between the sludge sheet and the hot air, further improving the sludge drying efficiency and the uniformity of internal drying. After the sludge is completely dried, it is sent out from the discharge port and received by the receiving mechanism for the next step of processing.

[0007] In the process of sludge drying, since the upper and lower surfaces of the sludge sheet are covered by the lower hydrophilic gauze and the upper hydrophilic gauze, it is possible to effectively prevent the dry mud dust on the surface of the sludge sheet from being blown by hot air to form flying dust, thereby avoiding the damage caused by dust to the staff, especially in the process of sludge treatment containing harmful substances such as paint, effectively improving safety and reducing the cleaning requirements inside the drying box. In addition, in the present invention, a steel wire mesh is used to transport the sludge sheet, and the lower hydrophilic gauze is wound on the steel wire mesh and moves synchronously with it, so that the steel wire mesh supports the sludge sheet and the lower hydrophilic gauze, and the steel wire mesh has a good heat conduction effect, while ensuring the drying effect of the lower hydrophilic gauze in combination with hot air drying on the sludge, it is avoided that the sludge sheet is directly laid on the lower hydrophilic gauze, which is easy to cause the lower hydrophilic gauze to deform under the action of sludge gravity and affect the sludge drying.

[0008] Furthermore, the laying mechanism includes a yarn winding shaft arranged along the length direction of the drying box and located on one side of the conveying mechanism, the upper layer of hydrophilic gauze is wound on the yarn winding shaft, both ends of the yarn winding shaft are positioned and rotatably installed in the drying box and are connected to a yarn taking-up motor that drives it to rotate and rewind the upper layer of hydrophilic gauze; the drying box is also provided with a yarn clamping assembly parallel to the yarn winding shaft, and both ends of the yarn clamping assembly are slidably installed in the drying box along the width direction of the drying box; a yarn guide roller parallel to the yarn winding shaft is provided between the yarn winding shaft and the yarn clamping assembly, the movable end of the upper layer of hydrophilic gauze passes around the yarn guide roller and is clamped and fixed by the yarn clamping assembly, and when the yarn clamping assembly slides in the direction away from the yarn winding shaft, it pulls the upper layer of hydrophilic gauze to lay it above the wire mesh.

[0009] By adopting the above technical scheme, the upper hydrophilic gauze is wound on the winding shaft, and initially, the yarn clamping assembly is close to the winding shaft, so that the movable end of the upper hydrophilic gauze is fixed on the yarn clamping assembly after passing the yarn guide roller. When laying the upper hydrophilic gauze, the yarn clamping assembly pulls the upper hydrophilic gauze when sliding away from the winding shaft, so as to lay it on the wire mesh. When it is necessary to retract the upper hydrophilic gauze, the yarn collection motor drives the winding shaft to rotate, and the yarn clamping assembly moves toward the winding shaft, so that the winding shaft can retract the upper hydrophilic gauze. The above structure is simple and easy to operate. The movable end of the upper hydrophilic gauze is fixed by the yarn clamping assembly, so that the laying and retraction of the upper hydrophilic gauze can be quickly realized.

[0010] Furthermore, the yarn clamping assembly includes a yarn clamping roller arranged along the length direction of the drying box, and the yarn clamping roller is provided with an arc plate coaxial with the yarn clamping roller, the inner wall of the arc plate cooperates with the outer wall of the yarn clamping roller, and the arc plate is installed on the yarn clamping roller along its radial sliding direction to approach or move away from its axis; the inner walls at both ends of the arc plate are respectively provided with tensioning springs arranged along its sliding direction, and the two ends of the yarn clamping roller are provided with clearance holes cooperating with the tensioning springs, one end of the tensioning spring is fixed at the bottom of the clearance hole, and the other end is connected to the inner wall of the arc plate; when the tensioning spring is in a normal state, the inner wall of the arc plate fits with the outer wall of the yarn clamping roller.

[0011] By adopting the above technical solution, when fixing the movable end of the upper hydrophilic gauze, the arc plate is pulled to separate it from the yarn clamping roller, and the movable end of the upper hydrophilic gauze is passed between the inner wall of the arc plate and the outer wall of the yarn clamping roller. After the arc plate is loosened, under the action of the tension spring, the arc plate fits the yarn clamping roller to press the movable end of the upper hydrophilic gauze, thereby achieving the movable end of the upper hydrophilic gauze. The above yarn clamping assembly has a simple structure and can conveniently and quickly fix the movable end of the upper hydrophilic gauze, so that the upper hydrophilic gauze can be laid when the yarn clamping assembly slides away from the yarn winding shaft, and the clamping effect of the movable end of the upper hydrophilic gauze is ensured.

[0012] Furthermore, sliding seats are respectively provided at both ends of the yarn clamping roller, and both ends of the yarn clamping roller are positioned and rotatably installed on the sliding seats. The inner walls at both ends of the drying box are provided with guide grooves arranged along its length direction and located above the conveying mechanism, and the sliding seats are respectively provided with guide blocks slidably installed in the corresponding guide grooves; a guide screw arranged along its length direction is positioned and rotatably installed in one of the guide grooves, the guide screw is threadedly connected to the corresponding guide block, and one end of the guide screw extends out of the drying box and is connected to a guide motor for driving it to rotate.

[0013] By adopting the above technical solution, the guide block on the sliding seat is slidably installed in the guide groove, so that the yarn clamping roller is slidably installed in the drying box along the width direction of the drying box, and the stability of the yarn clamping roller is ensured. When it is necessary to drive the yarn clamping assembly to slide, the guide motor is started, and the guide motor drives the guide screw to rotate. Under the threaded connection between the guide screw and the guide block, the guide groove cooperates with the limiting guide action of the guide block to drive the sliding seat to drive the yarn clamping roller to slide, and the structure is simple, easy to operate, and convenient to accurately control the sliding position of the yarn clamping roller. Among them, the yarn clamping roller is positioned and rotatably installed on the sliding seat. As long as enough upper hydrophilic gauze is reserved on the winding shaft, the unusable upper hydrophilic gauze can be directly wound on the yarn clamping roller after the water absorption effect of the upper hydrophilic gauze becomes worse. During the winding process, the upper hydrophilic gauze available on the winding shaft is immediately laid on the wire mesh for use, without stopping for replacement, ensuring the water absorption effect of the upper hydrophilic gauze on the sludge sheet, while improving the sludge drying efficiency and reducing the labor intensity.

[0014] Furthermore, one of the sliding seats is provided with a accommodating cavity, one end of the yarn clamping roller is provided with a yarn clamping gear which is coaxially arranged therewith and positioned and rotatably installed in the accommodating cavity, and a driving gear which meshes with the yarn clamping gear is also positioned and rotatably installed in the accommodating cavity; the outer wall of one end of the drying box is provided with a yarn clamping motor located on the side away from the yarn winding shaft, and the yarn clamping motor slides along the length direction of the drying box, and the outer wall of the drying box and the outer wall of the sliding seat are provided with an introduction hole which cooperates with the driving shaft of the yarn clamping motor. When the yarn clamping assembly slides to correspond to the yarn clamping motor, the driving shaft of the yarn clamping motor passes through the introduction hole and engages with the driving gear.

[0015] By adopting the above technical solution, when the yarn clamping assembly slides to correspond to the yarn clamping motor, the yarn clamping motor is driven to slide and its driving shaft passes through the introduction hole to engage with the driving gear. The yarn clamping motor drives the driving gear to rotate. Under the meshing action of the driving gear and the yarn clamping gear, the yarn clamping gear drives the yarn clamping roller to rotate and reel up the upper hydrophilic gauze. The structure is simple and easy to operate. Among them, a slidable yarn clamping motor and an introduction hole are provided, and the yarn clamping motor is arranged outside the drying box, which improves the service life of the yarn clamping motor and avoids affecting the sliding of the sliding seat. In addition, the yarn clamping gear and the driving gear are arranged in the accommodating cavity, which prevents the yarn clamping gear and the driving gear from being in a hot environment for a long time, thereby improving their service life.

[0016] Furthermore, the two side walls of the drying box along its length direction are respectively provided with disassembly and assembly openings corresponding to the winding shaft and the yarn clamping roller, and the disassembly and assembly openings are arranged along the length direction of the drying box. Each of the disassembly and assembly openings is correspondingly provided with a baffle door vertically slidably installed on the outer wall of the drying box, and each of the baffle doors is respectively provided with a transparent window.

[0017] By adopting the above technical solution, disassembly and assembly ports corresponding to the winding shaft and the clamping roller are respectively provided on both sides of the drying box. In normal state, the blocking door closes the disassembly and assembly ports to ensure the normal operation of the drying box. The staff can observe the internal situation of the drying box from the transparent window so as to replace the upper hydrophilic gauze on the winding shaft when the remaining amount is insufficient or the upper hydrophilic gauze on the clamping roller is too much. Among them, disassembly and assembly ports are provided on both sides of the drying box. When processing the upper hydrophilic gauze on the clamping roller, there is no need to reset the clamping assembly close to the winding shaft to avoid the outer diameter of the upper hydrophilic gauze roll formed on the clamping roller being too large to interfere with the surface of the wire mesh.

[0018] Furthermore, the pressing mechanism includes a pressing plate arranged on the upper end surface of the wire mesh along the length direction of the drying box, and the pressing plate is vertically slidably installed in the drying box; a plurality of pressing blocks are arranged in a rectangular array on the lower end surface of the pressing plate, and the pressing blocks are of a prism structure, and the area of ​​the lower end surface is smaller than that of the upper end surface; a blowing cavity is arranged in the pressing plate, and a plurality of the pressing blocks are provided with blowing ports which are adapted to their shapes and connected to the blowing cavity, and the end of the blowing port away from the blowing cavity passes through the lower end surface of the pressing block; a hair dryer is arranged on the top of the drying box, and an air inlet pipe which connects the hair dryer to the blowing cavity is arranged between the hair dryer and the blowing cavity.

[0019] By adopting the above technical solution, during the sludge drying process, the pressing plate is driven to move vertically downward, and a number of pressing blocks are used to press out a number of pits on the surface of the sludge sheet, thereby increasing the contact area between the surface of the sludge sheet and the hot air, thereby improving the sludge drying effect and drying efficiency. Among them, the pressing block is a prism structure and its lower end surface area is smaller than the upper end surface area, so the surface area of ​​the pit formed on the surface of the sludge sheet is larger, and the upper end opening of the pit is larger than the bottom opening, which is more convenient for hot air to contact its surface. After the pressing plate presses out the pit and resets, the hair dryer blows air to the pit on the surface of the sludge sheet through the air inlet pipe, the blowing chamber and the blowing ports on the pressing blocks, so as to blow the upper hydrophilic gauze to fit the surface of the pit, increase the contact area between the upper hydrophilic gauze and the upper surface of the sludge sheet as much as possible, and further improve the sludge drying effect and drying efficiency.

[0020] Furthermore, the pressing plate is hinged with pressing frames at both ends along its length direction, and the hinge axis of the pressing frame is arranged along the width direction of the pressing plate; the pressing frame is provided with a pressing shaft arranged along the width direction of the pressing plate at one end away from its rotation axis, and both ends of the pressing shaft are positioned and rotatably installed on the pressing frame, and its rotation axis is arranged along its length direction; the ends of the rotation axes of the two pressing frames are respectively provided with pressing gears located on the same side, and the pressing plate is provided with a double-rod driving cylinder arranged along its length direction, and the two ends of the double-rod driving cylinder are respectively connected with pressing racks meshing with the corresponding pressing gears, and a protective cover is provided outside the double-rod driving cylinder.

[0021] By adopting the above technical solution, the double-rod driving cylinder drives the two pressing racks to move, and under the meshing action of the pressing rack and the corresponding pressing gear, the pressing rack is driven to drive the pressing shaft to rotate, so that the pressing shaft moves down and contacts the upper hydrophilic gauze, and the upper hydrophilic gauze is pressed against the upper surface of the sludge sheet to ensure that the upper hydrophilic gauze and the sludge sheet fit and absorb water. Among them, a rotating pressing rack is set to adjust the pressing shaft and position, so as to ensure that the pressing shaft can always press the upper hydrophilic gauze against the upper surface of the sludge sheet. The double-rod driving cylinder is set to drive the two pressing racks to move synchronously at the same time, so that the two pressing shafts can move synchronously to ensure the pressing effect on the upper hydrophilic gauze. In addition, a protective cover is set to protect the double-rod driving cylinder to increase the service life of the double-rod driving cylinder.

[0022] Furthermore, the inner walls at both ends of the drying box are respectively provided with high-pressure spray guns located below the conveying mechanism, and multiple high-pressure spray guns are arranged in an array along the width direction of the drying box; several of the high-pressure spray guns are arranged tilted upward, and their higher ends are away from the feed port or discharge port close to them toward the lower surface of the wire mesh.

[0023] By adopting the above technical scheme, an inclined high-pressure spray gun is set, and air or water is sprayed by the high-pressure spray gun to clean the outer surface of the lower hydrophilic gauze, so as to avoid sludge adhering to the surface of the lower hydrophilic gauze and affecting the water absorption of the lower hydrophilic gauze during repeated work, thereby ensuring the working effect of the lower hydrophilic gauze. The structure is simple, the operation is convenient and the effect is obvious.

[0024] Furthermore, a plurality of diamond-shaped holes are arranged in an array on the outer surface of the steel wire mesh, and protrusions protruding toward the outer surface are arranged at the intersections of adjacent diamond-shaped holes; a plurality of hydrophilic cotton strips are arranged in an array along the length direction of the winding axis on the upper hydrophilic gauze, and the hydrophilic cotton strips are arranged along the movement direction of the upper hydrophilic gauze, and one end of the hydrophilic cotton strip close to the active end of the upper hydrophilic gauze extends out of the upper hydrophilic gauze.

[0025] By adopting the above technical solution, the diamond holes on the steel mesh facilitate the circulation of hot air, ensuring the drying effect on the lower surface of the sludge. The protruding points protruding to the outer surface at the intersection of adjacent diamond holes can form a number of pits on the lower surface of the sludge, reducing the thickness of the sludge sheet at this position, improving the sludge drying efficiency, and ensuring the sludge drying effect. The hydrophilic cotton strips on the upper hydrophilic gauze improve the capillary effect of the upper hydrophilic gauze, accelerate the water absorption performance of the upper hydrophilic gauze and the water penetration and spreading effect, and further improve the sludge drying efficiency and drying effect.

[0026] In summary, the present invention has the following beneficial effects:

[0027] 1. The present invention arranges a lower hydrophilic gauze and an upper hydrophilic gauze, and the sludge to be dried is spread between the lower hydrophilic gauze and the upper hydrophilic gauze in a sheet structure. The lower hydrophilic gauze and the upper hydrophilic gauze continuously absorb the internal moisture of the sludge sheet by the capillary principle, and the moisture absorbed by the lower hydrophilic gauze and the upper hydrophilic gauze quickly penetrates and spreads around the gauze under the capillary action. Under the action of hot air, the lower hydrophilic gauze and the upper hydrophilic gauze are quickly air-dried, and continue to absorb and disperse the moisture of the sludge sheet, and this is repeated. In this way, the lower hydrophilic gauze and the upper hydrophilic gauze are used to increase the water storage area through the capillary phenomenon, thereby effectively improving the drying efficiency and drying effect of the sludge sheet;

[0028] 2. In the present invention, since the sludge is covered by the upper hydrophilic gauze and the lower hydrophilic gauze, the dry dust on the surface of the sludge sheet can be effectively prevented from being blown by hot air to form flying dust, thereby avoiding the harm of dust to the workers, especially in the process of treating sludge containing harmful substances such as paint, effectively improving safety and reducing the need for cleaning inside the drying box;

[0029] 3. The present invention is provided with a lifting and lowering pressing mechanism including a pressing plate and a pressing block, and uses the pressing block to form pits on the sludge surface, thereby increasing the contact area between the sludge sheet surface and the hot air, thereby improving the sludge drying effect and drying efficiency; the pressing plate is provided with a blowing chamber, the pressing block is provided with a blowing port, and the pressing plate is connected to a hair dryer, so that the upper hydrophilic gauze is blown to fit the surface of the pit, thereby increasing the contact area between the upper hydrophilic gauze and the upper surface of the sludge sheet as much as possible, thereby further improving the sludge drying effect and drying efficiency;

[0030] 4. The present invention realizes the rapid laying of the upper hydrophilic gauze by setting up a laying mechanism including components such as a yarn winding shaft and a yarn clamping assembly. After the upper hydrophilic gauze has been used for a long time, it can be replaced without repeatedly opening the drying box, thereby ensuring the water absorption effect of the upper hydrophilic gauze on the sludge sheet, improving the sludge drying efficiency and reducing the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of a sludge drying device based on the capillary principle from the perspective of the feed inlet side;

[0032] Figure 2 It is a schematic diagram of the overall structure of a sludge drying device based on the capillary principle from the perspective of the discharge port side;

[0033] Figure 3 It is a schematic diagram of the internal structure of a sludge drying device based on the capillary principle;

[0034] Figure 4 It is a structural schematic diagram of a conveying mechanism in a sludge drying device based on the capillary principle;

[0035] Figure 5 It is a structural schematic diagram of a laying mechanism in a sludge drying device based on the capillary principle;

[0036] Figure 6 yes Figure 5 A magnified view of part A;

[0037] Figure 7 It is a cross-sectional view of a sludge drying device based on the capillary principle.

[0038] In the figure, 1, drying box; 11, feeding port; 12, discharging port; 13, guide groove; 14, guide screw; 15, guide motor; 16, introduction hole; 17, disassembly port; 18, blocking door; 181, transparent window; 19, operation port; 191, operation door; 2, conveying mechanism; 21, conveying roller; 22, wire mesh; 221, diamond hole; 222, convex point; 23, conveying motor; 3, lower hydrophilic gauze; 4, upper hydrophilic gauze; 41, hydrophilic cotton strip; 5, laying mechanism; 51, winding shaft; 511, yarn collecting motor; 52, yarn guide roller; 53, yarn clamping assembly; 54, yarn clamping roller; 541, clearance hole; 542, yarn clamping gear; 543, yarn clamping groove; 544, support block; 545, clearance groove; 55, arc plate; 551, tension spring; 552, yarn clamping protrusion; 56, sliding seat; 561, guide block; 562, accommodating chamber; 563, driving gear; 57, yarn clamping motor; 571, yarn winding cylinder; 6, material pressing mechanism; 61, material pressing plate; 611, blowing chamber; 612, material pressing cylinder; 62, material pressing block; 621, blowing port; 63, hair dryer; 631, air inlet pipe; 64, material pressing rack; 65, material pressing shaft; 651, material pressing gear; 66, double-rod driving cylinder; 661, material pressing rack; 662, protective cover; 7, high-pressure spray gun; 71, high-pressure spray pipe; 8, feeding mechanism; 81, feeding belt; 82, extrusion rack; 83, extrusion roller; 84, feeding hopper; 9, material receiving mechanism; 91, circulating material receiving rack; 92, material receiving bag; 93, material guiding channel; 94, discharge hopper; 10, control panel. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] A sludge drying device based on the capillary principle, such as Figure 1 , Figure 2 and Figure 3As shown, a drying box 1 is provided with a feed port 11 at one end and a discharge port 12 at the other end. A conveying mechanism 2 is provided in the drying box 1 along its length direction. One end of the conveying mechanism 2 for feeding is matched with the feed port 11, and one end of the conveying mechanism 2 for discharging is matched with the discharge port 12. A feeding mechanism 8 for delivering the sludge to be dried from the feed port 11 to the conveying mechanism 2 in the form of sheets is provided at one end of the drying box 1 near the feed port 11, and a receiving mechanism 9 for receiving the dried sludge is provided at one end of the drying box 1 near the discharge port 12. A pressing mechanism 6 is also provided in the drying box 1 above the conveying mechanism 2, which is used to form pits on the sludge surface during the drying process, increase the contact area between the sludge surface and the hot air, and improve the sludge drying efficiency and drying effect.

[0041] Among them, Figure 1 and Figure 3 As shown, a control panel 10 is provided on the outer wall of the drying box 1. The control panel 10 controls the automatic operation and linkage of various components such as the drying box 1, the conveying mechanism 2, the feeding mechanism 8, the receiving mechanism 9, and the pressing mechanism 6 through PLC control system communication. The PLC control technology is the prior art, and the drying structure and hot air drying principle of the drying box 1 are also the same as those in the prior art. They are not the innovation points of the present invention and will not be described in detail.

[0042] like Figure 3 and Figure 4 As shown, in this embodiment, the conveying mechanism 2 includes conveying rollers 21 arranged horizontally along the width direction of the drying box 1 and corresponding to the feed port 11 and the discharge port 12 respectively. The two conveying rollers 21 are positioned and rotatably installed in the drying box 1, and one of the conveying rollers 21 is connected to a conveying motor 23 driving it to rotate, and the conveying motor 23 is installed on the outer wall of the drying box 1. The outer shells of the two conveying rollers 21 are provided with a closed-loop moving steel wire mesh 22, and the outer surface of the steel wire mesh 22 is wound with a lower layer of hydrophilic gauze 3 that fits therewith and moves synchronously therewith. An upper hydrophilic gauze 4 is provided above the steel wire mesh 22, and the upper hydrophilic gauze 4 is connected to a laying mechanism 5 for rolling or laying it. After being laid, the upper hydrophilic gauze 4 completely covers the upper surface of the steel wire mesh 22, and its area is larger than the area of ​​the upper surface of the steel wire mesh 22, that is, the upper hydrophilic gauze 4 is located outside the steel wire mesh 22 on both sides along its length direction, and the upper hydrophilic gauze 4 completely covers the sludge sheet on the steel wire mesh 22, and its four sides extend outside the sludge sheet.

[0043] like Figure 1 , Figure 2 and Figure 3As shown, the feeding mechanism 8 places the sludge to be dried in the form of a sheet from the feed port 11 onto the steel mesh 22, and the lower hydrophilic gauze 3 contacts the lower surface of the sludge sheet. After all the sludge sheets enter the drying box 1, the laying mechanism 5 lays the lower hydrophilic gauze 3 on the upper surface of the sludge sheet, and then the drying box 1 dries the sludge sheet. During the drying process, the lower hydrophilic gauze 3 and the upper hydrophilic gauze 4 are in contact with the upper and lower surfaces of the sludge sheet respectively. Under the capillary action, the moisture in the sludge sheet is absorbed by the lower hydrophilic gauze 3 and the upper hydrophilic gauze 4 through capillary action, and quickly penetrates and spreads around the gauze under the capillary action. Under the action of hot air, the lower hydrophilic gauze 3 and the upper hydrophilic gauze 4 are quickly air-dried, and continue to absorb and disperse the moisture in the sludge sheet, and this is repeated. In this way, the lower hydrophilic gauze 3 and the upper hydrophilic gauze 4 are used to increase the water storage area through capillary phenomenon, thereby effectively improving the drying efficiency of the sludge sheet.

[0044] like Figure 3 As shown, during the sludge drying process, since the upper and lower surfaces of the sludge sheet are covered by the lower hydrophilic gauze 3 and the upper hydrophilic gauze 4, it can effectively prevent the dry mud dust on the surface of the sludge sheet from being blown by hot air to form flying dust, thereby avoiding the harm of dust to the workers, especially in the process of handling sludge containing harmful substances such as paint, effectively improving safety and reducing the need for cleaning inside the drying box 1. Figure 4 As shown, a plurality of diamond holes 221 are arranged in an array on the outer surface of the steel mesh 22, so that hot air can flow through the diamond holes 221 and contact the surface of the lower hydrophilic gauze 3, thereby ensuring the drying effect on the lower surface of the sludge. The intersections of adjacent diamond holes 221 are provided with convex points 222 protruding toward the outer surface, and the convex points 222 can form a plurality of pits on the lower surface of the sludge, thereby reducing the thickness of the sludge sheet at this position, improving the sludge drying efficiency, and ensuring the sludge drying effect.

[0045] like Figure 3 and Figure 4 As shown, in this embodiment, the lower hydrophilic gauze 3 is a long gauze with both ends fixed by Velcro or buttons to form a closed loop that matches the steel mesh 22. The lower hydrophilic gauze 3 is also connected to the steel mesh 22 by Velcro, buttons or cable ties on both sides along its length direction, ensuring that the lower hydrophilic gauze 3 can move synchronously with the steel mesh 22, and it is also convenient to replace the lower hydrophilic gauze 3 from the feed port 11 or the discharge port 12 of the drying box 1, thereby ensuring the use effect of the lower hydrophilic gauze 3. In addition, Figure 3 and Figure 5As shown, a plurality of hydrophilic cotton strips 41 are arranged in an array along the length direction of the drying box 1 on the upper hydrophilic gauze 4, and the hydrophilic cotton strips 41 are arranged along the moving direction of the upper hydrophilic gauze 4, and one end of the hydrophilic cotton strips 41 close to the active end of the upper hydrophilic gauze 4 extends out of the upper hydrophilic gauze 4. The hydrophilic cotton strips 41 are used to improve the capillary effect of the upper hydrophilic gauze 4, accelerate the water absorption performance and water penetration and spreading effect of the upper hydrophilic gauze 4, and further improve the sludge drying efficiency and drying effect.

[0046] like Figure 3 and Figure 5 As shown, in this embodiment, the laying mechanism 5 includes a winding shaft 51 arranged along the length direction of the drying box 1 and located on one side of the conveying mechanism 2, and the upper hydrophilic gauze 4 is wound on the winding shaft 51. Both ends of the winding shaft 51 are positioned and rotatably installed in the drying box 1, and one end of the winding shaft 51 is connected to a yarn collecting motor 511 that drives it to rotate and rewind the upper hydrophilic gauze 4. The yarn collecting motor 511 is installed on the outer wall of the drying box 1. A yarn clamping assembly 53 is also provided in the drying box 1, which is parallel to the winding shaft 51 and is used to fix the movable end of the upper hydrophilic gauze 4, and both ends of the yarn clamping assembly 53 are slidably installed in the drying box 1 along the width direction of the drying box 1. A yarn guide roller 52 parallel to the yarn winding shaft 51 is provided between the yarn winding shaft 51 and the yarn clamping assembly 53. Initially, the yarn clamping assembly 53 is close to the yarn winding shaft 51, and the movable end of the upper hydrophilic gauze 4 passes around the yarn guide roller 52 and is clamped and fixed by the yarn clamping assembly 53. Then, the yarn clamping assembly 53 slides away from the yarn winding shaft 51 to pull the upper hydrophilic gauze 4 to lay it above the wire mesh 22.

[0047] like Figure 5 and Figure 6 As shown, in this embodiment, the yarn clamping assembly 53 includes a yarn clamping roller 54 arranged along the length direction of the drying box 1, and an arc plate 55 coaxial with the yarn clamping roller 54 is arranged outside the yarn clamping roller 54, the inner wall of the arc plate 55 cooperates with the outer wall of the yarn clamping roller 54, and the arc plate 55 is installed on the yarn clamping roller 54 along its radial sliding direction to approach or move away from its axis. The inner walls at both ends of the arc plate 55 are respectively provided with tension springs 551 arranged along its sliding direction, and the two ends of the yarn clamping roller 54 are provided with clearance holes 541 that cooperate with the tension spring 551, one end of the tension spring 551 is fixed at the bottom of the clearance hole 541, and the other end is connected to the inner wall of the arc plate 55. When the tension spring 551 is in normal state, the inner wall of the arc plate 55 is in contact with the outer wall of the yarn clamping roller 54. When fixing the movable end of the upper hydrophilic gauze 4, pull the arc plate 55 to separate it from the yarn clamping roller 54, and pass the movable end of the upper hydrophilic gauze 4 between the inner wall of the arc plate 55 and the outer wall of the yarn clamping roller 54. After loosening the arc plate 55, under the action of the tensioning spring 551, the arc plate 55 fits against the yarn clamping roller 54 to press the movable end of the upper hydrophilic gauze 4, thereby achieving the movable end of the upper hydrophilic gauze 4.

[0048] like Figure 5 and Figure 6As shown, in order to facilitate operation when fixing the movable end of the upper hydrophilic gauze 4, a clearance groove 545 is provided at both ends of the yarn clamping roller 54, and a support block 544 is rotatably installed in the clearance groove 545. When the support block 544 is rotated to a vertical state, the upper end of the support block 544 abuts against the inner wall of the arc plate 55, and there is a certain gap between the inner wall of the arc plate 55 and the outer wall of the yarn clamping roller 54 for manually passing the movable end of the upper hydrophilic gauze 4 through the gap. When the support block 544 is in a horizontal state, it is completely contained in the clearance groove 545, so as to avoid affecting the fitting between the inner wall of the arc plate 55 and the outer wall of the yarn clamping roller 54. When the movable end of the upper hydrophilic gauze 4 needs to pass through between the inner wall of the top guard plate and the outer wall of the yarn clamping roller 54, the arc plate 55 is pulled away from the yarn clamping roller 54, and then the support block 544 is rotated to a vertical state and the arc plate 55 is released, and the support block 544 is used to overcome the pulling effect of the tensioning spring 551 on the arc plate 55.

[0049] Among them, Figure 5 and Figure 6 As shown, in order to ensure that the arc plate 55 fixes the upper hydrophilic gauze 4, a plurality of yarn clamping protrusions 552 are arranged in an array along the length direction of the inner wall of the arc plate 55, and a plurality of yarn clamping grooves 543 corresponding to the yarn clamping protrusions 552 are arranged on the outer surface of the yarn clamping roller 54. In addition, in order to facilitate pulling the arc plate 55 and rotating the support block 544, pull rings can be arranged at both ends of the arc plate 55 and on the surface of the support block 544. Figure 3 , Figure 5 and Figure 6 and Figure 7 As shown, in order to drive the yarn clamping assembly 53 to slide along the width direction of the drying box 1 to lay the upper hydrophilic gauze 4, sliding seats 56 are respectively provided at both ends of the yarn clamping roller 54, and guide grooves 13 arranged along the length direction and located above the conveying mechanism 2 are provided on the inner walls of both ends of the drying box 1, and guide blocks 561 slidably installed in the corresponding guide grooves 13 are respectively provided on the sliding seats 56. A guide screw 14 arranged along the length direction is positioned and rotatably installed in one of the guide grooves 13, and the guide screw 14 is threadedly connected to the corresponding guide block 561, and one end of the guide screw extends out of the drying box 1 and is connected to a guide motor 15 driving the guide screw 14 to rotate.

[0050] like Figure 5 and Figure 6 As shown, in order to avoid the need to repeatedly drive the clamping roller 54 to move, the two ends of the clamping roller 54 are positioned and rotatably installed on the sliding seat 56. As long as enough upper hydrophilic gauze 4 is reserved on the winding shaft 51, the unusable upper hydrophilic gauze 4 can be directly wound on the clamping roller 54 and the arc plate 55 after the water absorption effect of the upper hydrophilic gauze 4 deteriorates. During the winding process, the available upper hydrophilic gauze 4 on the winding shaft 51 is immediately laid above the wire mesh 22 for use, without the need to stop the machine for replacement. While ensuring the water absorption effect of the upper hydrophilic gauze 4 on the sludge sheet, the sludge drying efficiency is improved and the labor intensity is reduced.

[0051] like Figure 3 , Figure 5 and Figure 6 As shown, in order to realize the driving of the yarn clamping roller 54 to position and rotate to rewind the upper hydrophilic gauze 4 that is no longer used, and to avoid the interference between the positioning and rotation of the yarn clamping roller 54 and its sliding along the width direction of the drying box 1, a accommodating chamber 562 is provided in one of the sliding seats 56, and a yarn clamping gear 542 is provided at one end of the yarn clamping roller 54, which is coaxially arranged and positioned and rotated in the accommodating chamber 562, and a driving gear 563 meshing with the yarn clamping gear 542 is also positioned and rotated in the accommodating chamber 562. A yarn clamping motor 57 is provided on the outer wall of one end of the drying box 1, which is located on the side away from the yarn winding shaft 51. The yarn clamping motor 57 slides along the length direction of the drying box 1 and is connected to a yarn winding cylinder 571 that drives it to slide. An introduction hole 16 that cooperates with the driving shaft of the yarn clamping motor 57 is provided on the outer wall of the drying box 1 and the outer wall of the sliding seat 56.

[0052] like Figure 3 , Figure 5 and Figure 6 As shown, when the yarn clamping assembly 53 slides to correspond to the yarn clamping motor 57, the yarn winding cylinder 571 drives the yarn clamping motor 57 to slide so that its driving shaft passes through the introduction hole 16 and engages with the driving gear 563, and the yarn clamping motor 57 works to drive the driving gear 563 to rotate. Under the meshing action of the driving gear 563 and the yarn clamping gear 542, the yarn clamping gear 542 drives the yarn clamping roller 54 to rotate and rewind the upper hydrophilic gauze 4. Among them, a travel switch can be set on the guide motor 15, so as to control the sliding seat 56 to drive the yarn clamping roller 54 to move, so as to ensure that the introduction hole 16 on the outer wall of the drying box 1 and the outer wall of the sliding seat 56 can accurately correspond. Of course, when the sludge sheet is fed, the yarn winding shaft 51 and the yarn clamping roller 54 can cooperate with each other to wind the upper hydrophilic gauze 4, and straighten the upper hydrophilic gauze 4, so that there is enough gap between the upper hydrophilic gauze 4 and the lower hydrophilic gauze 3 for the sludge sheet to be transported forward.

[0053] like Figure 1 , Figure 2 and Figure 3 As shown, for ease of operation, the drying box 1 is provided with a winding shaft 51 and a clamping roller 54 (marked at Figure 5The disassembly and assembly port 17 corresponding to the upper layer of hydrophilic gauze 4 on the winding shaft 51 is replaced when there is insufficient surplus of the upper layer of hydrophilic gauze 4 on the clamping roller 54. The disassembly and assembly port 17 is arranged along the length direction of the drying box 1. Each disassembly and assembly port 17 is correspondingly provided with a baffle door 18 which is vertically slidably installed on the outer wall of the drying box 1, and each baffle door 18 is provided with a transparent window 181. In normal state, the baffle door 18 closes the disassembly and assembly port 17 to ensure the normal operation of the drying box 1. The staff can observe the internal situation of the drying box 1 from the transparent window 181, so as to replace it when the upper layer of hydrophilic gauze 4 on the winding shaft 51 is insufficient or the upper layer of hydrophilic gauze 4 on the clamping roller 54 is too much. Among them, the disassembly and assembly port 17 is arranged on both sides of the drying box 1. When processing the upper layer of hydrophilic gauze 4 on the clamping roller 54, there is no need to reset the clamping assembly 53 close to the winding shaft 51, so as to avoid the upper layer of hydrophilic gauze 4 formed on the clamping roller 54. The outer diameter of the roll is too large and interferes with the surface of the wire mesh 22. In addition, operating ports 19 with operating doors 191 are respectively provided at both ends of the drying box 1, and the operating ports 19 correspond to the two ends of the yarn clamping roller 54, so that the movable ends of the upper hydrophilic gauze 4 can be fixed on the yarn clamping assembly 53 from both ends of the yarn clamping roller 54.

[0054] like Figure 3 and Figure 7 As shown, in this embodiment, the pressing mechanism 6 includes a pressing plate 61 arranged on the upper end surface of the wire mesh 22 along the length direction of the drying box 1. The pressing plate 61 is vertically slidably installed in the drying box 1, and is connected to a pressing cylinder 612 that drives it to slide vertically. A plurality of pressing blocks 62 are arranged in a rectangular array on the lower end surface of the pressing plate 61. The pressing blocks 62 are in a prism structure, and the area of ​​the lower end surface is smaller than the area of ​​the upper end surface. During the sludge drying process, the pressing plate 61 is driven to move vertically downward, and a plurality of pressing blocks 62 are used to press out a plurality of pits on the surface of the sludge sheet, thereby increasing the contact area between the surface of the sludge sheet and the hot air, thereby improving the sludge drying effect and drying efficiency. Among them, the pressing block 62 is in a prism structure and the area of ​​the lower end surface is smaller than the area of ​​the upper end surface, so that the surface area of ​​the pit formed on the surface of the sludge sheet is larger, and the upper end opening of the pit is larger than the bottom opening, which is more convenient for hot air to contact with its surface.

[0055] like Figure 3 and Figure 7As shown, in order to prevent the pressing plate 61 from always pressing the sludge sheet and affecting the hot air circulation during the sludge drying process, the pressing plate 61 needs to move upward away from the upper hydrophilic gauze 4 after the pressing block 62 presses a pit on the surface of the sludge sheet. In order to make the upper hydrophilic gauze 4 contact the pit surface on the sludge sheet to improve the sludge drying efficiency, in this embodiment, a blowing chamber 611 is provided in the pressing plate 61, and a plurality of pressing blocks 62 are provided with blowing ports 621 that are adapted to their shapes and connected to the blowing chamber 611, and one end of the blowing port 621 away from the blowing chamber 611 passes through the lower end surface of the pressing block 62. A hair dryer 63 is provided on the top of the drying box 1, and an air inlet pipe 631 is provided between the hair dryer 63 and the blowing chamber 611 to connect them. After the pressing plate 61 is reset after pressing the pits, the blower 63 blows air toward the pits on the surface of the sludge sheet through the air inlet pipe 631, the blowing chamber 611 and the blowing ports 621 on the pressing blocks 62, so as to blow the upper hydrophilic gauze 4 to fit the surface of the pits, thereby increasing the contact area between the upper hydrophilic gauze 4 and the upper surface of the sludge sheet as much as possible, thereby further improving the sludge drying effect and drying efficiency.

[0056] like Figure 3 and Figure 7 As shown, in order to further improve the degree of fit between the upper hydrophilic gauze 4 and the surface of the sludge sheet, a press frame 64 with a hinge axis arranged along the width direction of the press plate 61 is hinged at both ends of the press plate 61 along its length direction, and a press shaft 65 arranged along the width direction of the press plate 61 is arranged at one end of the press frame 64 away from its rotation axis. Both ends of the press shaft 65 are positioned and rotatably mounted on the press frame 64, and its rotation axis is arranged along its length direction. The press frame 64 is driven to drive the press shaft 65 to rotate, so that the press shaft 65 moves down and abuts against the upper hydrophilic gauze 4, and the upper hydrophilic gauze 4 is pressed against the upper surface of the sludge sheet, ensuring that the upper hydrophilic gauze 4 fits the sludge sheet and absorbs water.

[0057] Among them, Figure 3 and Figure 7 As shown, in order to realize driving the two pressing racks 64 to rotate synchronously, the ends of the rotating shafts of the two pressing racks 64 are respectively provided with pressing gears 651 located on the same side, and the pressing plate 61 is provided with a double-rod driving cylinder 66 arranged along its length direction, and the two ends of the double-rod driving cylinder 66 are respectively connected with pressing racks 661 meshing with the corresponding pressing gears 651, and the double-rod driving cylinder 66 is provided with a protective cover 662. The double-rod driving cylinder 66 drives the two pressing racks 661 to move, and under the meshing action of the pressing racks 661 and the corresponding pressing gears 651, the pressing rack 64 is driven to drive the pressing shaft 65 to rotate.

[0058] like Figure 7As shown, after long-term use, the upper hydrophilic gauze 4 and the lower hydrophilic gauze 3 will inevitably have mud attached, and the upper hydrophilic gauze 4 can be shaken by the cooperation of the winding shaft 51 and the clamping roller 54, and the attached mud is shaken off to realize cleaning. In order to realize the cleaning treatment of the lower hydrophilic gauze 3, the inner wall at both ends of the drying box 1 is respectively provided with a high-pressure spray gun 7 located below the conveying mechanism 2, and the high-pressure spray gun 7 is provided with a plurality of arrays along the width direction of the drying box 1, and the several high-pressure spray guns 7 at the same end are connected to the same high-pressure nozzle 71. Among them, several high-pressure spray guns 7 are arranged obliquely upward, and their higher ends are away from the feed port 11 or the discharge port 12 close to it toward the lower surface of the wire mesh 22. In this way, the high-pressure spray gun 7 is used to spray air or water, and the outer surface of the lower hydrophilic gauze 3 is cleaned, so as to avoid mud from adhering to the surface of the lower hydrophilic gauze 3, and the water absorption when the lower hydrophilic gauze 3 is affected during repeated work is ensured. The working effect of the lower hydrophilic gauze 3 is ensured.

[0059] like Figure 1 As shown, in this embodiment, the feeding mechanism 8 includes an extrusion frame 82 arranged at one end of the drying box 1 near the feed inlet 11, and two extrusion rollers 83 arranged front and back are positioned and rotatably mounted on the extrusion frame 82, and the extrusion rollers 83 are connected to an extrusion motor that drives them to rotate relative to each other, and there is an extrusion gap between the two extrusion rollers 83. A feeding hopper 84 is provided on the extrusion frame 82, and the discharge port 12 of the feeding hopper 84 corresponds to the extrusion gap. Below the extrusion gap, a feeding belt 81 is provided along the length direction of the drying box 1 and corresponding to the feed inlet 11. The sludge in the feeding hopper 84 passes through the extrusion gap and is extruded into a sheet structure and falls on the feeding belt 81. The feeding belt 81 transports the sludge sheet forward from the feed inlet 11 to the wire mesh 22. In other embodiments, the two extrusion rollers 83 can slide closer to or farther from each other to adjust the size of the extrusion gap, so that sludge sheets of different thicknesses can be supplied to the drying box 1.

[0060] like Figure 2 As shown, in this embodiment, the material receiving mechanism 9 includes a circulating material receiving frame 91 arranged at one end of the drying box 1 near the discharge port 12, and a plurality of material receiving bags 92 with upper openings are hung on the circulating material receiving frame 91; the discharge port 12 of the drying box 1 is connected to a material guiding channel 93 arranged obliquely downward, and the opening size of the end of the material guiding channel 93 away from the discharge port 12 is smaller than the opening size of the end near the discharge port 12, and a discharge hopper 94 is connected to its lower end. When the circulating material receiving frame 91 drives the material receiving bag 92 to rotate in a circular manner, the material receiving bag 92 is moved in sequence to cooperate with the discharge port 12 of the discharge hopper 94, so that the dried sludge is loaded into the material receiving bag 92 for the next step of processing. Among them, the driving structure for the circulating material receiving frame 91 to drive the plurality of material receiving bags 92 to circulate can be a chain sprocket drive or a belt drive, and a circulating belt for support can be set below the bottom of the plurality of material receiving bags 92, which is the same as the prior art and will not be described in detail, and is only briefly illustrated in the figure.

[0061] Working principle and use method of the present invention:

[0062] The feeding mechanism 8 squeezes the sludge to be dried into a sheet, and places the sludge sheet from the feed port 11 onto the wire mesh 22 through the feeding belt 81, and the lower hydrophilic gauze 3 contacts the lower surface of the sludge sheet. After all the sludge sheets enter the drying box 1, the yarn clamping assembly 53 is driven to move away from the winding shaft 51, and the lower hydrophilic gauze 3 is laid on the upper surface of the sludge sheet. The pressing plate 61 moves downward so that the pressing block 62 is reset after forming a number of pits on the surface of the sludge sheet, and the blower 63 blows air to the pits on the surface of the sludge sheet through the air inlet pipe 631, the blowing cavity 611 and the blowing ports 621 on the pressing blocks 62, so as to blow the upper hydrophilic gauze 4 to fit the surface of the pits, and increase the contact area between the upper hydrophilic gauze 4 and the upper surface of the sludge sheet as much as possible. At the same time, the pressing frame 64 is driven to drive the pressing shaft 65 to rotate, so that the pressing shaft 65 moves down to abut against the upper hydrophilic gauze 4, and presses the upper hydrophilic gauze 4 against the upper surface of the sludge sheet to ensure that the upper hydrophilic gauze 4 fits the sludge sheet and absorbs water.

[0063] The drying box 1 dries the sludge sheet. During the drying process, the lower hydrophilic gauze 3 and the upper hydrophilic gauze 4 are in contact with the upper and lower surfaces of the sludge sheet respectively. Under the capillary action, the moisture in the sludge sheet is absorbed by the lower hydrophilic gauze 3 and the upper hydrophilic gauze 4 through the capillary action, and quickly penetrates and spreads around the gauze under the capillary action. Under the action of hot air, the lower hydrophilic gauze 3 and the upper hydrophilic gauze 4 are quickly dried and continue to absorb and disperse the moisture in the sludge sheet.

[0064] After finishing drying, the pressing shaft 65 is reset, the winding shaft 51 and the clamping roller 54 rotate in coordination to straighten the upper hydrophilic gauze 4, the steel mesh 22 moves to send the dried sludge from the discharge port 12, the dried sludge is collected by the receiving bag 92 through the guide channel 93 and the storage hopper, and the sludge sheet to be dried sent by the feeding mechanism 8 is sent to the steel mesh 22 to be dried. Then the winding shaft 51 and the clamping roller 54 rotate in coordination to release the upper hydrophilic gauze 4, and the pressing mechanism 6 repeats the above steps to continue the sludge drying. During the rotation of the steel mesh 22, the high pressure spray gun 7 works to clean the surface of the lower hydrophilic gauze 3. When the water absorption effect of the upper hydrophilic gauze 4 deteriorates, the unusable upper hydrophilic gauze 4 is directly wound on the clamping roller 54 and the curved plate 55, and the upper hydrophilic gauze 4 available on the winding shaft 51 is immediately laid on the steel mesh 22 for use.

[0065] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A sludge drying device based on the capillary principle, characterized in that: The invention comprises a drying box (1), wherein a conveying mechanism (2) is arranged in the drying box (1) along its length direction, and an end of the drying box (1) close to the conveying mechanism (2) for feeding is provided with a feeding port (11) matched with the conveying mechanism (2), and an end of the drying box (1) close to the conveying mechanism (2) for discharging is provided with a discharging port (12) matched with the conveying mechanism (2); an end of the drying box (1) close to the feeding port (11) is provided with a loading mechanism (8), and an end of the drying box (1) close to the discharging port (12) is provided with a receiving mechanism (9), and the drying box (1) is also provided with a pressing mechanism (6) located above the conveying mechanism (2); the conveying mechanism (2) comprises a horizontally arranged and Conveying rollers (21) corresponding to the feed port (11) and the discharge port (12) respectively, the two conveying rollers (21) being positioned and rotatably installed in the drying box (1), and the outer shells of the two conveying rollers (21) are provided with a steel wire mesh (22) that moves in a closed loop, and the outer surface of the steel wire mesh (22) is provided with a lower layer of hydrophilic gauze (3) that fits the steel wire mesh and moves synchronously with the steel wire mesh; an upper layer of hydrophilic gauze (4) is provided above the steel wire mesh (22), and the upper layer of hydrophilic gauze (4) is connected to a laying mechanism (5) for rolling or laying the upper layer of hydrophilic gauze (4), and the upper layer of hydrophilic gauze (4) completely covers the upper surface of the steel wire mesh (22) after laying, and its area is larger than the area of ​​the upper surface of the steel wire mesh (22); The pressing mechanism (6) comprises a pressing plate (61) arranged on the upper end surface of the steel wire mesh (22) along the length direction of the drying box (1), and the pressing plate (61) is vertically slidably installed in the drying box (1); a plurality of pressing blocks (62) are arranged in a rectangular array on the lower end surface of the pressing plate (61), and the pressing blocks (62) are of a prism structure, and the area of ​​the lower end surface is smaller than that of the upper end surface; a blowing cavity (611) is arranged in the pressing plate (61), and a plurality of the pressing blocks (62) are provided with blowing ports (621) adapted to the shape thereof and connected to the blowing cavity (611), and the end of the blowing port (621) away from the blowing cavity (611) passes through the lower end surface of the pressing block (62); a hair dryer (63) is arranged on the top of the drying box (1), and an air inlet pipe (631) is arranged between the hair dryer (63) and the blowing cavity (611) to connect them.

2. A sludge drying device based on the capillary principle according to claim 1, characterized in that: The laying mechanism (5) comprises a yarn winding shaft (51) arranged along the length direction of the drying box (1) and located on one side of the conveying mechanism (2); the upper hydrophilic gauze (4) is wound on the yarn winding shaft (51); both ends of the yarn winding shaft (51) are positioned and rotatably installed in the drying box (1) and are connected to a yarn taking-up motor (511) for driving the yarn winding shaft to rotate and take up the upper hydrophilic gauze (4); the drying box (1) is also provided with a yarn clamping assembly (53) parallel to the yarn winding shaft (51); the yarn clamping assembly (53) is arranged in parallel with the yarn winding shaft (51); The two ends of the component (53) are slidably installed in the drying box (1) along the width direction of the drying box (1); a yarn guide roller (52) parallel to the yarn winding shaft (51) is provided between the yarn winding shaft (51) and the yarn clamping component (53); the movable end of the upper hydrophilic gauze (4) passes around the yarn guide roller (52) and is clamped and fixed by the yarn clamping component (53); when the yarn clamping component (53) slides in a direction away from the yarn winding shaft (51), it pulls the upper hydrophilic gauze (4) and lays it on the top of the steel wire mesh (22).

3. A sludge drying device based on the capillary principle according to claim 2, characterized in that: The yarn clamping assembly (53) comprises a yarn clamping roller (54) arranged along the length direction of the drying box (1); an arc plate (55) coaxial with the yarn clamping roller (54) is arranged outside the yarn clamping roller (54); the inner wall of the arc plate (55) cooperates with the outer wall of the yarn clamping roller (54), and the arc plate (55) is installed on the yarn clamping roller (54) in a radially sliding manner to approach or move away from its axis; the inner walls at both ends of the arc plate (55) are respectively provided with tensioning springs (551) arranged along the sliding direction thereof; the two ends of the yarn clamping roller (54) are provided with clearance holes (541) cooperating with the tensioning springs (551); one end of the tensioning spring (551) is fixed at the bottom of the clearance hole (541), and the other end is connected to the inner wall of the arc plate (55); when the tensioning spring (551) is in a normal state, the inner wall of the arc plate (55) is in contact with the outer wall of the yarn clamping roller (54).

4. The sludge drying device based on the capillary principle according to claim 3 is characterized in that: The two ends of the yarn clamping roller (54) are respectively provided with sliding seats (56), and the two ends of the yarn clamping roller (54) are positioned and rotatably mounted on the sliding seats (56). The inner walls of the two ends of the drying box (1) are provided with guide grooves (13) arranged along the length direction and located above the conveying mechanism (2), and the sliding seats (56) are respectively provided with guide blocks (561) slidably mounted in the corresponding guide grooves (13); a guide screw (14) arranged along the length direction is positioned and rotatably mounted in one of the guide grooves (13), and the guide screw (14) is threadedly connected to the corresponding guide block (561), and one end of the guide screw protrudes out of the drying box (1) and is connected to a guide motor (15) for driving it to rotate.

5. The sludge drying device based on the capillary principle according to claim 4 is characterized in that: One of the sliding seats (56) is provided with a accommodating cavity (562), one end of the yarn clamping roller (54) is provided with a yarn clamping gear (542) which is coaxially arranged therewith and is positioned and rotatably installed in the accommodating cavity (562), and a driving gear (563) which meshes with the yarn clamping gear (542) is also positioned and rotatably installed in the accommodating cavity (562); an outer wall of one end of the drying box (1) is provided with a yarn clamping motor (57) located on the side away from the winding shaft (51), and the yarn clamping motor (57) slides along the length direction of the drying box (1), and the outer wall of the drying box (1) and the outer wall of the sliding seat (56) are provided with an introduction hole (16) which cooperates with the driving shaft of the yarn clamping motor (57); when the yarn clamping assembly (53) slides to correspond to the yarn clamping motor (57), the driving shaft of the yarn clamping motor (57) passes through the introduction hole (16) and is engaged with the driving gear (563).

6. The sludge drying device based on the capillary principle according to claim 3 is characterized in that: The drying box (1) is provided with disassembly and assembly openings (17) corresponding to the yarn winding shaft (51) and the yarn clamping roller (54) on both side walls along the length direction thereof, and the disassembly and assembly openings (17) are arranged along the length direction of the drying box (1), and each of the disassembly and assembly openings (17) is provided with a stop door (18) vertically slidably mounted on the outer wall of the drying box (1), and each of the stop doors (18) is provided with a transparent window (181).

7. The sludge drying device based on the capillary principle according to claim 1, characterized in that: The pressing plate (61) is hinged with a pressing frame (64) at both ends along its length direction, and the hinge axis of the pressing frame (64) is arranged along the width direction of the pressing plate (61); the pressing frame (64) is provided with a pressing shaft (65) arranged along the width direction of the pressing plate (61) at one end away from its rotation axis, and the two ends of the pressing shaft (65) are positioned and rotatably installed on the pressing frame (64), and its rotation axis is arranged along its length direction; the ends of the rotation axes of the two pressing frames (64) are respectively provided with pressing gears (651) located on the same side, and the pressing plate (61) is provided with a double-rod driving cylinder (66) arranged along its length direction, and the two ends of the double-rod driving cylinder (66) are respectively connected with pressing racks (661) meshing with the corresponding pressing gears (651), and the double-rod driving cylinder (66) is provided with a protective cover (662) outside.

8. The sludge drying device based on the capillary principle according to claim 1, characterized in that: The inner walls at both ends of the drying box (1) are respectively provided with high-pressure spray guns (7) located below the conveying mechanism (2), and a plurality of the high-pressure spray guns (7) are arranged in an array along the width direction of the drying box (1); a plurality of the high-pressure spray guns (7) are arranged obliquely upward, and their higher ends are away from the feed port (11) or the discharge port (12) close thereto and are directed toward the lower surface of the steel wire mesh (22).

9. A sludge drying device based on the capillary principle according to any one of claims 1 to 8, characterized in that: The outer surface of the steel wire mesh (22) is provided with a plurality of rhombus-shaped holes (221) in an array, and the intersections of adjacent rhombus-shaped holes (221) are provided with protrusions (222) protruding toward the outer surface; a plurality of hydrophilic cotton strips (41) are provided in an array along the length direction of the winding shaft (51) on the upper hydrophilic gauze (4), and the hydrophilic cotton strips (41) are arranged along the moving direction of the upper hydrophilic gauze (4), and one end of the hydrophilic cotton strips (41) close to the movable end of the upper hydrophilic gauze (4) protrudes out of the upper hydrophilic gauze (4).

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