A sludge drying system

Abstract

The present invention relates to the technical field of sludge treatment, and in particular to a sludge drying system, wherein at least one drying conveyor line and a lower mesh belt conveyor line are arranged inside a drying box; the drying conveyor line includes a long conveyor line, a short conveyor line and a drop-type drying conveyor line arranged below the short conveyor line; a cutting and stratifying component capable of separating the sludge on the long conveyor line into upper and lower layers is arranged between the long conveyor line and the short conveyor line; the cutting and stratifying component is used to separate the upper layer of sludge on the long conveyor line to the short conveyor line, and to separate the lower layer of sludge on the long conveyor line to the drop-type drying conveyor line. The beneficial effects of the present invention are: through the sludge drying system, the shape and form of the sludge on the conveyor line change, and more positions of the sludge are in contact with hot air, thereby improving the efficiency and quality of drying.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, and in particular to a sludge drying system. Background Art

[0002] Sludge drying and dehydration is an important step in the resource utilization of sludge, and the box-type drying system is a commonly used equipment for sludge drying. In the prior art, the working process of the box-type drying system is as follows: the sludge dehydrated at the front end is sent to the feed port through the lifting equipment, cut into strips by the strip cutter inside the feed port, and then falls into the mesh belt conveyor line inside the box; multiple mesh belt conveyor lines are arranged along the height direction inside the box, and the sludge passes through the multi-level mesh belt conveyor lines in turn, and is transported in a "Z"-shaped line. During the transportation process, the hot air mechanism arranged at the bottom of the box conveys hot air from bottom to top to accelerate the evaporation and drying of the water in the sludge strips. A fan is also arranged on the top of the box to discharge and recycle the gas in the box in time.

[0003] In the existing sludge drying system, during the conveying process, the sludge and the mesh belt conveyor line are relatively still, and only a disordered flip is performed when the sludge falls from the previous conveyor line to the next conveyor line. The technical problems it has are: the shape of the sludge strips on the same conveyor line does not change, the contact surface between the sludge strips and the hot air is fixed, and there is a lack of a "flipping and baking" process. The sludge heat transfer effect is poor, especially the heat transfer effect of the drier surface is lower. Therefore, the drying progress between the various surfaces of the sludge strips and between the surface and the interior is seriously out of sync, resulting in low drying efficiency or poor local drying, affecting the sludge quality. Summary of the invention

[0004] The purpose of the present invention is to provide a sludge drying system in view of the defects and shortcomings of the prior art.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A sludge drying system described in the present invention comprises an organic housing; a drying housing is arranged on the housing; a feed port is arranged on the top of the drying housing; a strip cutter is arranged inside the feed port; at least one drying conveyor line and a lower mesh belt conveyor line are arranged inside the drying housing; the drying conveyor line and the lower mesh belt conveyor line are arranged in sequence along the height direction; the drying conveyor line comprises a long conveyor line, a short conveyor line and a drop-type drying conveyor line arranged below the short conveyor line; the horizontal height of the long conveyor line is higher than the horizontal height of the short conveyor line; a cutting and stratification component capable of separating the sludge on the long conveyor line into upper and lower layers is arranged between the long conveyor line and the short conveyor line; the cutting and stratification component is used to separate the upper layer of sludge on the long conveyor line onto the short conveyor line, and to separate the lower layer of sludge on the long conveyor line onto the drop-type drying conveyor line.

[0007] Furthermore, the cutting and stratification assembly includes a stratification knife; the stratification knife includes a knife holder fixed inside the drying box and an inclined plate fixed on the knife holder; a cutter is fixed at one end of the inclined plate; the other end of the inclined plate is arranged above the short conveyor line; the blade of the cutter faces the incoming direction of the sludge; the inclined plate is fixed to one end of the cutter away from the blade; the height of the horizontal plane of the inclined plate gradually decreases as it moves away from the cutter; the cutter is arranged on the upper surface of the long conveyor line.

[0008] Furthermore, a vibrator is fixed at the bottom of the inclined plate; a stratification wheel is arranged above the blade portion of the cutter; the stratification wheel comprises a rotating shaft and a plurality of blades evenly distributed on the circumferential surface of the rotating shaft.

[0009] Furthermore, the drop-type drying conveyor line is composed of multiple lifting conveyor lines arranged along the length direction of the short conveyor line; a collecting hopper is arranged between the long conveyor line and the short conveyor line; the lifting conveyor line includes a lower horizontal section, a lifting section and an upper horizontal section; the lower horizontal section, the lifting section and the upper horizontal section are arranged in sequence along the conveying direction of the short conveyor line; the upper horizontal section of the previous lifting conveyor line is arranged above the lifting section of the next lifting conveyor line; a plurality of baffles are evenly distributed on the surface of the lifting conveyor line; the baffles are arranged along the conveying direction of the lifting conveyor line; and the lifting conveyor line is provided with a blow hood at a position directly opposite to the lifting section.

[0010] Furthermore, a longitudinal ridge forming plate is provided on the discharge direction of the short conveyor line; a plurality of material discharge troughs are provided on a surface of the longitudinal ridge forming plate facing the short conveyor line; the material discharge troughs are evenly arranged along the width direction of the short conveyor line; the material discharge trough is composed of a guide groove and a limiting groove connected to the bottom of the guide groove; the width of the guide groove gradually increases in the direction away from the limiting groove.

[0011] Furthermore, a transverse ditch forming assembly is provided in the discharge direction of the drop-type drying conveyor line; a mudguard is provided between the transverse ditch forming assembly and the drop-type drying conveyor line; the transverse ditch forming assembly is used to form transverse ditch on the sludge below.

[0012] Furthermore, the transverse ridge forming assembly includes a first cam, a sliding seat fixed on the chassis and a lifting guide shaft slidably connected to the sliding seat; a lifting rod and a baffle fixing plate are fixed at both ends of the lifting guide shaft respectively; a silicone rubber baffle is provided on the baffle fixing plate; a first spring is fixed on the sliding seat; the other end of the first spring is fixed on the baffle fixing plate; a first follower wheel is rotatably connected to the lifting rod; the wheel body of the first cam is pressed against the surface of the first follower wheel.

[0013] Furthermore, both the long conveyor line and the lower mesh belt conveyor line are provided with S-ridge forming assemblies; the S-ridge forming assemblies include a second cam, a slider fixed on the chassis and a slide rail slidably connected to the slider; a round rod fixing seat is fixed on the slide rail; a plurality of round rods are fixed on the round rod fixing seat; the round rods are arranged along the width direction of the long conveyor line; a connecting shaft is fixed on the round rod fixing seat; a follower wheel fixing seat is fixed on the connecting shaft; a second follower wheel is rotatably connected to the follower wheel fixing seat; the wheel body of the second follower wheel is pressed against the surface of the second cam; a slider fixing plate is fixed on the slider; a second spring is connected between the follower wheel fixing seat and the slider fixing plate.

[0014] Furthermore, there are two drying conveying lines; and the conveying directions of the two drying conveying lines are opposite.

[0015] After adopting the above structure, the beneficial effects of the present invention are:

[0016] 1. The cut sludge is divided into two layers, the upper and lower layers, which are transported and dried in the short conveyor line and the drop-type drying conveyor line respectively, so that the shape and form of the sludge on the drying conveyor line change, and more sludge surface contacts with hot air, which improves the drying efficiency.

[0017] 2. By stratifying the sludge, the contact area between the sludge and the air can be increased, and the center part of the sludge after cutting can be exposed to the outside, so that the drying is more uniform and the drying quality is improved.

[0018] 3. The sludge is layered and merged multiple times to form a stirring and mixing effect, which further makes the drying of each part of the sludge more uniform and improves the drying efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention after the front sealing plate is removed;

[0020] Figure 2 It is a structural diagram of the drying conveying line;

[0021] Figure 3 It is a structural diagram of the cross ridge furrow forming assembly;

[0022] Figure 4 It is a structural diagram of cutting layered components;

[0023] Figure 5 This is a structural diagram of the longitudinal furrow forming board;

[0024] Figure 6 It is a structural diagram of the S ridge forming assembly;

[0025] Figure 7 It is the structural diagram of the lifting conveyor line;

[0026] Description of reference numerals:

[0027] 1. Machine body; 101. Strip cutting machine; 102. Discharging port; 103. Drying box;

[0028] 2. transverse furrow forming assembly; 201. first cam; 202. lifting rod; 203. first follower wheel;

[0029] 204, lifting guide shaft; 205, sliding seat; 206, first spring; 207, baffle fixing plate;

[0030] 208, silicone rubber baffle; 3, lifting conveyor line; 301, lower horizontal section; 302, lifting section;

[0031] 303, upper horizontal section; 304, baffle bar; 4, short conveyor line; 5, long conveyor line;

[0032] 6. S ridge forming assembly; 601. slide rail; 602. round rod fixing seat; 603. round rod;

[0033] 604, slider; 605, connecting shaft; 606, second spring; 607, second cam;

[0034] 608, second follower wheel; 609, slider fixing plate; 6010, follower wheel fixing seat; 7, layering knife;

[0035] 701, cutting knife; 702, inclined plate; 703, vibrator; 704, knife holder; 8, longitudinal furrow forming plate;

[0036] 801, guide groove; 802, limit groove; 9, lower net belt conveyor line; 10, layering wheel; 1001, blade;

[0037] 1002. rotating shaft; 11. collecting hopper; 12. blowing hood; 13. mudguard. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] like Figures 1 to 7 As shown, a sludge drying system of the present invention comprises an organic box 1; a drying box 103 is arranged on the machine box 1; a feed port is arranged on the top of the drying box 103; a strip cutter 101 is arranged inside the feed port; the strip cutter 101 has no essential difference from the prior art, so it is not described in detail;

[0040] At least one drying conveyor line and a lower mesh belt conveyor line 9 are arranged inside the drying box 103; the drying conveyor line and the lower mesh belt conveyor line 9 are arranged in sequence along the height direction;

[0041] The drying conveyor line includes a long conveyor line 5, a short conveyor line 4 and a drop-type drying conveyor line arranged below the short conveyor line 4; the horizontal height of the long conveyor line 5 is higher than the horizontal height of the short conveyor line 4;

[0042] A cutting and stratification component is arranged between the long conveying line 5 and the short conveying line 4, which can separate the sludge on the long conveying line 5 into an upper and lower layer; the cutting and stratification component is used to separate the upper layer of sludge on the long conveying line 5 to the short conveying line 4, and to separate the lower layer of sludge on the long conveying line 5 to the drop-type drying conveying line.

[0043] The long conveyor line 5, the short conveyor line 4 and the lower mesh belt conveyor line 9 are all mesh belt conveyor lines, which are essentially the same as the existing sludge drying system conveyor lines, so they are not described in detail. The mesh belt aperture, hole spacing and arrangement method need to be selected according to the specific product. The long conveyor line 5, the short conveyor line 4 and the lower mesh belt conveyor line 9 are all connected to the power system, and the power system drives the long conveyor line 5, the short conveyor line 4 and the lower mesh belt conveyor line 9 to move;

[0044] Because the viscosity of the sludge gradually decreases after being transported and dried, the drop-type drying conveyor line is arranged above the lower mesh belt conveyor line 9; the bottom layer of the conveyor line adopts a straight lower mesh belt conveyor line 9, and the sludge is no longer turned over.

[0045] A hot air component is arranged inside the cabinet 1. The hot air emitted by the hot air component penetrates each mesh belt from bottom to top from the drying cabinet 103. After passing through the mesh holes of the mesh belt, the hot air contacts each surface of the sludge on the surface of the mesh belt, heats the sludge, and accelerates the evaporation rate of water vapor. The hot air with water vapor is sucked back into the cabinet 1 by the circulating fan at the top, dried by the drying system in the cabinet 1, and then reheated, and then enters the drying cabinet 103, forming an internal circulation of hot air.

[0046] After the sludge is dehydrated at the front end, it enters the feed port through the lifting conveyor line. The strip cutter 101 inside the feed port cuts the sludge into strips and then drops it to the top long conveyor line 5. After preliminary drying, the sludge is divided into upper and lower layers on the long conveyor line 5 by cutting the layering components; the upper layer of sludge enters the short conveyor line 4; the lower layer of sludge falls from the end of the long conveyor line 5 to the drop-type drying conveyor line; the center part of the original sludge strip is directly exposed to the outside after cutting and layering, which increases the heating area of ​​the sludge strip and reduces the difference in dryness inside and outside the sludge strip; the upper layer of sludge dried by the short conveyor line 4 and the lower layer of sludge dried by the drop-type drying conveyor line are combined on the next drying conveyor line, and the above-mentioned drying process is repeated, and finally falls to the lower mesh belt conveyor line 9 to complete the drying step; finally, the sludge is discharged from the end of the lower mesh belt conveyor line 9 to the discharge port 102.

[0047] The beneficial effects of the present invention are:

[0048] 1. The cut sludge is divided into two layers, the upper and lower layers, which are transported and dried in the short conveyor line and the drop-type drying conveyor line respectively, so that the shape and form of the sludge on the drying conveyor line change, and more sludge surface contacts with hot air, which improves the drying efficiency.

[0049] 2. By stratifying the sludge, the contact area between the sludge and the air can be increased, and the center part of the sludge after cutting can be exposed to the outside, so that the drying is more uniform and the drying quality is improved.

[0050] 3. The sludge is layered and merged multiple times to form a stirring and mixing effect, which further makes the drying of each part of the sludge more uniform and improves the drying efficiency and quality.

[0051] As a preferred embodiment of the present invention, the cutting and layering assembly includes a layering knife 7; the layering knife 7 includes a knife holder 704 fixed inside the drying box 103 and an inclined plate 702 fixed on the knife holder 704; a cutting knife 701 is fixed at one end of the inclined plate 702; and the other end of the inclined plate 702 is arranged above the short conveying line 4;

[0052] The blade of the cutter 701 faces the incoming direction of the sludge; the inclined plate 702 is fixed on the end of the cutter 701 away from the blade; the height of the horizontal plane of the inclined plate 702 gradually decreases as it moves away from the end of the cutter 701; the cutter 701 is arranged on the upper surface of the long conveyor line 5;

[0053] Baffle plates are provided on both sides of the cutter 701; after the middle position of the sludge strip with initial velocity on the long conveyor line 5 collides with the cutter 701, the sludge strip is cut into upper and lower layers by the cutter; the sludge in the upper layer enters the top surface of the cutter 701, and is pushed onto the surface of the inclined plate 702 by the incoming material from the rear, and enters the short conveyor line 4 through the inclined surface of the inclined plate 702; the sludge in the lower layer enters the drop-type drying conveyor line along the long conveyor line 5; the sludge strip itself relies on the initial velocity provided by the long conveyor line 5 and cooperates with the fixed cutter 701 to complete the cutting and stratification. The cutter 701 does not need to have its own power, which makes the structure of the cutter 701 simpler, and the cutter 701 and the knife holder 704 are fixed with bolts to facilitate the maintenance of the cutting and stratification components.

[0054] As a preferred embodiment of the present invention, a vibrator 703 is fixed at the bottom of the inclined plate 702; a stratification wheel 10 is arranged above the blade of the cutter 701; the stratification wheel 10 comprises a rotating shaft 1002 and a plurality of blades 1001 uniformly distributed on the circumferential surface of the rotating shaft 1002;

[0055] After the vibrator 703 vibrates, it drives the inclined plate 702 to vibrate with high frequency and small amplitude;

[0056] The rotating shaft 1002 is connected to the motor; after the sludge strips cut by the cutter 701 enter the upper surface of the cutter 701, the rotating shaft 1002 is driven by the motor to move, and the blades sweep the sludge on the upper surface of the cutter 701 onto the inclined plate 702; then the vibrator 703 vibrates the inclined plate 702 to accelerate the sludge to slide down from the inclined plate 702, prevent the cutting layered components from piling up, and make the thickness of the sludge entering the short conveyor line 4 more uniform, thereby ensuring the drying efficiency of the sludge strips on the short conveyor line 4.

[0057] As a preferred embodiment of the present invention, the drop-type drying conveyor line comprises a plurality of lifting conveyor lines 3 arranged along the length direction of the short conveyor line 4; a collecting hopper 11 is arranged between the long conveyor line 5 and the short conveyor line 4; the lifting conveyor line 3 comprises a lower horizontal section 301, a lifting section 302 and an upper horizontal section 303; the lower horizontal section 301, the lifting section 302 and the upper horizontal section 303 are arranged in sequence along the conveying direction of the short conveyor line 4; the upper horizontal section 303 of the previous lifting conveyor line 3 is arranged above the lifting section 302 of the latter lifting conveyor line 3; a plurality of baffles 304 are evenly distributed on the surface of the lifting conveyor line 3; the baffles 304 are arranged along the conveying direction of the lifting conveyor line 3; the lifting conveyor line 3 is provided with a blowing hood 12 at a position directly opposite to the lifting section 302;

[0058] A heating pipe is arranged inside the blowing hood 12, and the blowing hood 12 is connected to the air path so as to blow out hot air; the lower horizontal section 301 is used to prevent sludge from scattering to the outside along the lifting section 302, and is used to ensure material connection; a avoiding recess is arranged at a position opposite to the baffle 304 in the conveying mesh belt used for tensioning and lifting the conveying line 3.

[0059] like Figure 2 As shown, after the sludge is layered, the sludge in the lower layer enters the collecting hopper 11 from the long conveying line 5, and is discharged from the bottom of the collecting hopper 11 to the lifting section 302 of the rightmost lifting conveying line 3; the blocking bar 304 pushes the sludge to move to the upper horizontal section 303, and then falls into the lifting section 302 of the next lifting conveying line 3 at the end of the upper horizontal section 303; and so on, until it falls from the upper horizontal section 303 of the last lifting conveying line 3 to the long conveying line 5 below, and merges with the sludge that falls from the short conveying line 4 to the long conveying line 5;

[0060] When the sludge strips fall from the upper horizontal section 303, the hot air blown out by the blowing hood 12 can make the sludge do horizontal throwing motion, and the sludge with lower humidity and density is blown farther and directly enters the higher position of the lifting section 302. The hot air sorting by the blowing hood 12 shortens the conveying and drying path of the sludge with lower humidity, and the sludge with higher humidity has a longer conveying path in the lifting section 302 and a longer drying time; in addition to playing the role of sorting, the blowing hood 12 can also blow out hot air to assist in drying the sludge in the lifting section 302.

[0061] When the sludge falls from the upper horizontal section 303, the sludge does not come into contact with any shielding objects and is completely exposed to the hot air, so that the sludge can come into contact with the hot air more comprehensively, thereby improving its drying effect.

[0062] The arrangement of multiple lifting conveyor lines 3 allows the sludge to form a wavy conveying path, thereby extending the drying path of the sludge. In addition, since the average humidity of the sludge at the bottom of the long conveyor line 5 is higher than the average humidity of the sludge at the top of the long conveyor line 5, the sludge at the bottom of the long conveyor line 5 is separated to the drop-type drying conveyor line with better drying effect, which can reduce the humidity difference between the upper sludge and the lower sludge before the next confluence, so that the humidity of the sludge is more uniform after the confluence of the next long conveyor line 5.

[0063] After the sludge comes out of the collecting hopper 11, the airflow passing through the blowing hood 12 can make the sludge flip in the air, and part of the sludge can be turned over. By continuously using multiple lifting conveying lines 3 in cooperation with the blowing hood 12 to turn the sludge over, most of the sludge can be turned over on the back side in the upper horizontal section 303 and the lifting conveying line 3, so that the dryness of each surface of the sludge is more uniform.

[0064] As a preferred embodiment of the present invention, a longitudinal ridge shaping plate 8 is provided in the discharge direction of the short conveyor line 4; a surface of the longitudinal ridge shaping plate 8 facing the short conveyor line 4 is provided with a plurality of feed troughs; the feed troughs are evenly arranged along the width direction of the short conveyor line 4;

[0065] The discharge chute is composed of a guide groove 801 and a limiting groove 802 connected to the bottom of the guide groove 801; the width of the guide groove 801 gradually increases in the direction away from the limiting groove 802; a sharp angle is formed between the tops of adjacent guide grooves 801; the sludge from the short conveyor line 4 is thrown onto the longitudinal ditch forming plate 8 and then falls, first entering the guide groove 801, and the gradually narrowing guide groove 801 introduces the sludge into the limiting groove 802. Since the short conveyor line 4 and the long conveyor line 5 have the same speed, but the sludge entering from the short conveyor line 4 to the long conveyor line 5 is limited by the guide groove 801 and the limiting groove 802, due to the gap between the adjacent limiting grooves 802, it is taken away by the long conveyor line 5 to form multiple ditches arranged along the width direction of the long conveyor line 5. At this time, the height of the sludge is higher than that of the short conveyor line 4, and the contact area between the sludge and the air is increased through the ridges; since the baffle 304 will form an intermittent and discontinuous material belt when discharging material on the lifting conveyor line 3, the longitudinal material belt formed by the longitudinal ridge forming plate 8 is interwoven into a grid-shaped structure, and these vertically and horizontally intersecting grid holes can improve the air permeability of the mesh belt, ensure the smooth flow of hot air, increase the contact area between the sludge and the hot air, and enhance the drying effect of the sludge.

[0066] As a preferred embodiment of the present invention, a transverse ridge forming assembly 2 is provided in the discharge direction of the drop-type drying conveyor line; a mud guard 13 is provided between the transverse ridge forming assembly 2 and the drop-type drying conveyor line; the transverse ridge forming assembly 2 is used to form transverse ridges on the sludge below;

[0067] Since the sludge on the lifting conveyor line 3 and the sludge on the short conveyor line 4 converge on the next long conveyor line 5 or the lower mesh belt conveyor line 9; and a plurality of baffles 304 are evenly distributed on the surface of the lifting conveyor line 3, the sludge discharged from the lifting conveyor line 3 will form discontinuous intermittent discharge.

[0068] If the discharge material on the lifting conveyor line 3 is directly stacked on the sludge entering the next long conveyor line 5 or the lower mesh belt conveyor line 9 from the short conveyor line 4, the sludge will accumulate upward, which will reduce the drying effect of the accumulation area; by forming a transverse ditch on the sludge of the long conveyor line 5 or the lower mesh belt conveyor line 9 through the transverse ditch forming component 2, and then the transverse material belt discharged from the lifting conveyor line 3 falls into the transverse ditch for replenishment, which can reduce the height of the sludge accumulation and make the drying effect of the sludge on the long conveyor line 5 or the lower mesh belt conveyor line 9 more uniform; the mud guard 13 allows the sludge of the drop-type drying conveyor line to fall along the surface of the mud guard 13 into the groove formed by the transverse ditch forming component 2.

[0069] As a preferred embodiment of the present invention, the transverse ridge shaping assembly 2 includes a first cam 201, a sliding seat 205 fixed on the chassis 1, and a lifting guide shaft 204 slidably connected to the sliding seat 205; the lifting rod 202 and the baffle fixing plate 207 are fixed at both ends of the lifting guide shaft 204 respectively; a silicone rubber baffle 208 is provided on the baffle fixing plate 207; a first spring 206 is fixed on the sliding seat 205; the other end of the first spring 206 is fixed on the baffle fixing plate 207; a first follower wheel 203 is rotatably connected to the lifting rod 202; the wheel body of the first cam 201 is pressed against the surface of the first follower wheel 203;

[0070] The first spring 206 generates a pulling force on the baffle fixing plate 207, so that the surface of the first follower wheel 203 is pressed against the surface of the first cam 201; the first cam 201 is connected to the motor; a continuous concave-convex shape is set on the surface of the first cam 201; the motor drives the first cam 201 to rotate, so that the silicone rubber baffle 208 spanning the next long conveyor line 5 or the lower mesh belt conveyor line 9 performs a reciprocating lifting motion; in the brief moment when the silicone rubber baffle 208 descends and inserts into the sludge of the long conveyor line 5 or the lower mesh belt conveyor line 9, the sludge is blocked, and a transverse ditch is formed at the position swept by the silicone rubber baffle 208; each reciprocating motion can form a transverse ditch, and the continuously reciprocating lifting silicone rubber baffle 208 forms multiple transverse ditches;

[0071] The spacing between adjacent baffles 304 on the lifting conveyor line 3 is the baffle spacing; when debugging the equipment, it is necessary to control the speed of the first cam 201 by controlling the motor speed, so that the activity period of the silicone rubber baffle 208 is equal to the time required for the baffle 304 to move in the baffle spacing, so that each transverse sludge strip formed on the lifting conveyor line 3 falls into the transverse ditch as much as possible.

[0072] As a preferred embodiment of the present invention, the long conveyor line 5 and the lower mesh belt conveyor line 9 are both provided with an S-shaped ditch forming assembly 6; the S-shaped ditch forming assembly 6 includes a second cam 607, a slider 604 fixed on the chassis 1 and a slide rail 601 slidably connected to the slider 604; a round rod fixing seat 602 is fixed on the slide rail 601; a plurality of round rods 603 are fixed on the round rod fixing seat 602; the round rods 603 are arranged along the width direction of the long conveyor line 5; a connecting shaft 605 is fixed on the round rod fixing seat 602; a follower wheel fixing seat 6010 is fixed on the connecting shaft 605; a second follower wheel 608 is rotatably connected to the follower wheel fixing seat 6010; the wheel body of the second follower wheel 608 is pressed against the surface of the second cam 607; a slider fixing plate 609 is fixed on the slider 604; a second spring 606 is connected between the follower wheel fixing seat 6010 and the slider fixing plate 609;

[0073] The S ridge shaping assembly 6 can be arranged on each horizontal conveying line; the second spring 606 presses the second follower wheel 608 against the surface of the second cam 607;

[0074] The second cam 607 is essentially the same as the prior art, and its surface is provided with continuous concave and convex shapes; the bottom end of the round rod 603 is close to the surface of the conveyor line, so the round rod 603 is inserted into the sludge;

[0075] The second cam 607 is connected to a motor, which drives the second cam 607 to rotate, driving the slide rail 601 to move on the slider 604, so that the slide rail 601 reciprocates on the slider 604 perpendicular to the conveying direction of the sludge. In addition, the sludge moves in a straight line on the conveying line, so that the sludge on the surface of the long conveying line 5 and the lower mesh belt conveying line 9 forms "S"-shaped ridges, thereby enhancing the ability of hot air to penetrate the mesh belt, and increasing the contact area between the sludge and the hot air, thereby improving the drying efficiency.

[0076] As a preferred embodiment of the present invention, there are two drying conveying lines; the conveying directions of the two drying conveying lines are opposite. The two drying conveying lines can cause the sludge to be turned over and mixed multiple times, thereby increasing the chances of each surface of the sludge being in contact with hot air.

[0077] After adopting the above structure, the beneficial effects of the present invention are:

[0078] 1. The sludge itself relies on the initial velocity provided by the long conveyor line and cooperates with the fixed cutter to complete the cutting and stratification. The cutter does not need its own power, which makes the structure of the cutter simpler. The cutter and the knife holder are fixed with bolts to facilitate the maintenance of the cutting and stratification components.

[0079] 2. Through the hot air sorting of the blowing hood, the drying path of the sludge with lower humidity is shortened, the conveying path of the sludge with higher humidity is longer, the drying time is longer, and the drying uniformity is improved; in addition to the sorting function, the blowing hood can also assist in drying.

[0080] 3. Multiple lifting conveyor lines make the sludge form a wavy path. On the one hand, it extends the drying path of the sludge. On the other hand, since the average humidity of the sludge at the bottom of the long conveyor line is higher than the average humidity of the sludge at the top of the long conveyor line, the sludge at the bottom of the long conveyor line is separated to the drop-type drying conveyor line with better drying effect. It can reduce the humidity difference between the upper and lower sludge when they are merged next time, making the humidity of the sludge more uniform after merging on the next long conveyor line.

[0081] 4. Through the guide grooves and limit grooves of the longitudinal ridge forming plate and the baffles set on the lifting conveyor line, the sludge forms a grid shape on the conveyor line. These vertical and horizontal intersecting grid holes can improve the air permeability of the mesh belt, ensure the smooth flow of hot air, increase the contact area between sludge and hot air, and enhance the drying effect of sludge.

[0082] 5. An S-shaped ditch forming component is set on the conveyor line so that the sludge on the surface of the long conveyor line and the lower mesh belt conveyor line forms an "S"-shaped ditch, which enhances the ability of hot air to penetrate the mesh belt, increases the contact area between the sludge and the hot air, and improves the drying efficiency.

[0083] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A sludge drying system, comprising an organic housing (1); a drying housing (103) is arranged on the housing (1); a feed port is arranged on the top of the drying housing (103); a strip cutter (101) is arranged inside the feed port; Features: A lower mesh belt conveyor line (9) and at least one drying conveyor line are arranged inside the drying box (103); the drying conveyor line and the lower mesh belt conveyor line (9) are arranged in sequence from top to bottom along the height direction; The drying conveyor line comprises a long conveyor line (5), a short conveyor line (4), and a drop-type drying conveyor line arranged below the short conveyor line (4); the horizontal height of the long conveyor line (5) is higher than the horizontal height of the short conveyor line (4); A cutting and stratifying component capable of separating the sludge on the long conveying line (5) into an upper and lower layer is provided between the long conveying line (5) and the short conveying line (4); the cutting and stratifying component is used to separate the upper layer of sludge on the long conveying line (5) onto the short conveying line (4), and to separate the lower layer of sludge on the long conveying line (5) onto the drop-type drying conveying line; The drop-type drying conveyor line is composed of a plurality of lifting conveyor lines (3) arranged along the length direction of the short conveyor line (4); the lifting conveyor line (3) comprises a lower horizontal section (301), a lifting section (302) and an upper horizontal section (303); the lower horizontal section (301), the lifting section (302) and the upper horizontal section (303) are arranged in sequence along the conveying direction of the short conveyor line (4); the upper horizontal section (303) of the previous lifting conveyor line (3) is arranged above the lifting section (302) of the next lifting conveyor line (3); a plurality of baffles (304) are evenly distributed on the surface of the lifting conveyor line (3); the baffles (304) are arranged along the conveying direction of the lifting conveyor line (3); the lifting conveyor line (3) is provided with a blowing hood (12) at a position directly opposite to the lifting section (302); A longitudinal ridge shaping plate (8) is provided in the discharge direction of the short conveyor line (4); a surface of the longitudinal ridge shaping plate (8) facing the short conveyor line (4) is provided with a plurality of material discharge troughs; the material discharge troughs are evenly arranged along the width direction of the short conveyor line (4); The feed chute is composed of a guide groove (801) and a limiting groove (802) connected to the bottom of the guide groove (801); the width of the guide groove (801) gradually increases in the direction away from the limiting groove (802); the sludge from the short conveyor line (4) is thrown onto the longitudinal ridge forming plate (8) and then falls down, and the sludge first enters the guide groove (801), and the gradually narrowing guide groove (801) guides the sludge into the limiting groove (802).

2. A sludge drying system according to claim 1, characterized in that: The cutting and layering assembly comprises a layering knife (7); the layering knife (7) comprises a knife holder (704) fixed inside the drying box (103) and an inclined plate (702) fixed on the knife holder (704); a cutting knife (701) is fixed at one end of the inclined plate (702); the other end of the inclined plate (702) is arranged above the short conveying line (4); The blade of the cutter (701) faces the incoming direction of the sludge; the inclined plate (702) is fixed to an end of the cutter (701) away from the blade; the height of the horizontal plane of the inclined plate (702) gradually decreases as it moves away from the cutter (701); and the cutter (701) is arranged on the upper surface of the long conveyor line (5).

3. A sludge drying system according to claim 2, characterized in that: A vibrator (703) is fixed at the bottom of the inclined plate (702); a stratification wheel (10) is arranged above the blade portion of the cutter (701); the stratification wheel (10) comprises a rotating shaft (1002) and a plurality of blades (1001) evenly distributed on the circumferential surface of the rotating shaft (1002).

4. A sludge drying system according to claim 1, characterized in that: A transverse ridge forming assembly (2) is provided in the discharge direction of the drop-type drying conveyor line; a mud guard (13) is provided between the transverse ridge forming assembly (2) and the drop-type drying conveyor line; the transverse ridge forming assembly (2) is used to form transverse ridges on the sludge below.

5. A sludge drying system according to claim 4, characterized in that: The transverse ridge forming assembly (2) comprises a first cam (201), a sliding seat (205) fixed on the chassis (1), and a lifting guide shaft (204) slidably connected to the sliding seat (205); a lifting rod (202) and a baffle fixing plate (207) are respectively fixed at both ends of the lifting guide shaft (204); a silicone rubber baffle (208) is provided on the baffle fixing plate (207); a first spring (206) is fixed on the sliding seat (205); the other end of the first spring (206) is fixed on the baffle fixing plate (207); a first follower wheel (203) is rotatably connected to the lifting rod (202); and the wheel body of the first cam (201) is pressed against the surface of the first follower wheel (203).

6. A sludge drying system according to claim 1, characterized in that: The long conveyor line (5) and the lower mesh belt conveyor line (9) are both provided with an S-shaped ditch forming assembly (6); the S-shaped ditch forming assembly (6) comprises a second cam (607), a slider (604) fixed on the chassis (1), and a slide rail (601) slidably connected to the slider (604); a round rod fixing seat (602) is fixed on the slide rail (601); a plurality of round rods (603) are fixed on the round rod fixing seat (602); the round rods (603) are arranged along the width direction of the long conveyor line (5); a connecting shaft ( 605); a follower wheel fixing seat (6010) is fixed on the connecting shaft (605); a second follower wheel (608) is rotatably connected to the follower wheel fixing seat (6010); a wheel body of the second follower wheel (608) is pressed against the surface of the second cam (607); a slider fixing plate (609) is fixed on the slider (604); a second spring (606) is connected between the follower wheel fixing seat (6010) and the slider fixing plate (609); the second spring (606) presses the second follower wheel (608) against the surface of the second cam (607).

7. A sludge drying system according to claim 1, characterized in that: There are two drying conveying lines; and the conveying directions of the two drying conveying lines are opposite.

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