Sludge drying device

Abstract

The invention discloses a sludge drying device, which belongs to the technical field of sludge treatment equipment, and structurally comprises a drying cylinder, a filter belt, a compression roller I and a compression roller II, an air inlet end and an air outlet end are arranged on the two sides of the drying cylinder respectively, the two filter belts are connected together in a sleeved mode and stretched and straightened in the middle of the drying cylinder through a plurality of sets of pressing rollers I and pressing rollers II, and the edges of the ends of the two filter belts abut against each other to form a sealing structure. A storage space for temporarily storing sludge to be filter-pressed is defined by the middle parts of the two filter belts, the storage space is divided into a vertical feeding area and a plurality of filter-pressing areas by a plurality of groups of compression rollers I and compression rollers II, and a sludge particle guide-out bin and a sludge guide-in bin are respectively arranged on the upper side and the lower side of the vertical feeding area; the sludge is dried in combination with heat treatment and filter pressing modes, and on the basis, the sludge adding, containing and discharging modes are optimized, the sludge drying period is shortened, and the continuous use efficiency of equipment is improved.

Description

Technical Field

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

[0002] Sludge treatment is an important part of the sewage treatment system. Perfect sludge treatment facilities and technologies can improve the overall operating efficiency and treatment level of sewage treatment plants and ensure the sustainable development of the sewage treatment industry. The existing application number is CN202311568111.8, which discloses a sludge drying device. The patent document discloses a method of spraying flocculants, combining hot air charging and continuous stirring to dry sludge with a high water content. The dried sludge is pressed into a mud cake and discharged. Specifically: the driving shaft drives the stirring rod to revolve, and the cooperation of the worm gear, the first gear and the second gear allows the stirring rod to rotate. The self-rotation of the stirring rod causes the auxiliary rod to extend out of the side wall of the stirring rod, thereby breaking up the sludge block in the drying cylinder, thereby facilitating the compaction and drying of the sludge by the compaction component, through the inner rod, the plug and the movable With the cooperation of the column, when the stirring rod rotates, the movable column opens the spray port, and the plug is turned with the stirring rod to make the flocculant spray out, and then the flocculant is evenly transported to the inside of the sludge under the transportation of the hot air in the stirring rod. With the cooperation of the stirring rod and the inner rod, even if the sludge enters the stirring rod, it will be sent out by the hot air. When the sludge clumps in the stirring rod, the stirring rod and the inner rod can also grind the sludge to avoid the problem that the stirring rod cannot rotate due to the sludge. Through the setting of the auxiliary component, the large sludge that has not been compacted by the compaction component and still has water inside is avoided, and it is directly discharged through the discharge port after passing through the auxiliary component. However, when using the technical solution in the above patent document, the heat treatment method adopted is to dry the sludge to evaporate the internal moisture. The extrusion components in the equipment only have the function of discharging the dried sludge and do not have a filter pressing effect. Due to the low heat conduction efficiency, the drying cycle is long and the energy efficiency ratio is insufficient. At the same time, due to the size limitations of the material addition port and the discharge port, there is a bottleneck in the equipment processing capacity, and continuous and efficient operation cannot be achieved. Therefore, the present application provides a sludge drying device. Summary of the invention

[0003] In order to solve the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a sludge drying device, which combines heat treatment and filter pressing to dry the sludge, and on this basis, optimizes the methods of sludge addition, accommodation and discharge, shortens the sludge drying cycle, and improves the continuous use efficiency of the equipment.

[0004] The technical solution adopted by the present invention to solve the technical problem is: Provided is a sludge drying device, comprising a drying cylinder, a filter belt, a pressure roller I and a pressure roller II; an air inlet end and an exhaust end are respectively arranged on both sides of the drying cylinder, two filter belts are arranged, the two filter belts are sleeved together, and are stretched and straightened in the middle of the drying cylinder by multiple groups of pressure rollers I and II, the edges of the two filter belt ends abut against each other to form a sealing structure, and the middle parts of the two filter belts are enclosed to form a storage space for temporarily storing sludge to be filtered; the multiple groups of pressure rollers I and II divide the storage space into a vertical feeding area and multiple filtering areas, and the upper and lower sides of the vertical feeding area are respectively provided with a mud particle export bin and a mud import bin, the outer side surfaces of the mud import bin and the mud particle export bin abut against and fit with the surface of the filter belt, and a spiral conveying rod is rotatably installed in the mud particle export bin.

[0005] Furthermore, a discharge notch is provided at the bottom of the sludge inlet bin, a scraper inlet edge is provided at the top of the mud particle outlet bin, pipe I is connected to both ends of the sludge inlet bin, and pipe II is connected to one end of the mud particle outlet bin. Both pipes I and II pass through the drying cylinder and extend to the outside of the drying cylinder.

[0006] In the present application, an optional technical solution for keeping the edges of the two filter belt ends in contact with each other is: a magnetic attraction point is set on the edge of the filter belt end, and the multiple magnetic attraction points on the two filter belts correspond to each other and are connected by magnetic adsorption coupling. The magnetic attraction points can use spherical particles of neodymium magnets or cylindrical neodymium magnets.

[0007] In the present application, another optional technical solution for keeping the edges of the two filter belt ends in contact with each other is: the edge of the filter belt end and the transition point of the filter belt form a step edge, and an annular groove is respectively provided in the middle of the outer side of the pressure roller I and the pressure roller II, and the step edge is in contact with the edge of the annular groove. By increasing the number of pressure rollers I and II, the proportion of the area where the two filter belts are continuously compressed is increased, thereby preventing sludge from leaking from the edges.

[0008] Furthermore, two clamps are provided in the drying cylinder, the inner side surfaces of the clamps are in contact with the surface of the filter belt, the clamps on one side are detachably fixedly connected to the inner wall of the drying cylinder, and the two clamps are connected together by four U-shaped docking seats, and the four U-shaped docking seats are grouped in pairs, and the two groups of U-shaped docking seats are respectively mounted on the two ends of the sludge inlet bin and the mud particle outlet bin.

[0009] Furthermore, a fan blade is rotatably installed in the air inlet end, a gear shaft is fixedly installed at the end of the fan blade, an exhaust pipe is connected to the exhaust end, a motor I is installed at the lower end of the side of the drying cylinder, a driving gear is installed on the output shaft of the motor I, and the driving gear and the gear shaft are connected by a transmission belt.

[0010] Furthermore, two pressure rollers I in the same group are rotatably mounted on a side extension bracket, and multiple side extension brackets are distributed on the outer circumference of the shaft rod, and the shaft rod is fixedly mounted on the base; a driving shaft is arranged at the end of the pressure roller I, and a motor III for controlling the rotation of the driving shaft is installed on the side extension bracket, and the output shaft of the motor III is connected to the driving shaft through a coupling.

[0011] Furthermore, two pressure rollers II in the same group are rotatably mounted on a telescopic frame, and a plurality of telescopic frames are distributed on the inner circumference of the drying cylinder. A telescopic driver is installed on the drying cylinder to drive the telescopic frame to move in a direction perpendicular to the axis of the shaft.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The sludge drying device of the present invention sends hot air to the air inlet end, and the hot air passes through the filter holes on the filter belt surface to take away the moisture in the sludge in the storage space, and then the air containing droplets is discharged from the exhaust end; it drives multiple rollers I and II to rotate synchronously, and since the spacing between each group of rollers I and II gradually decreases along the sludge conveying direction, the sludge in the storage space is subjected to step-by-step filter pressure treatment; under the combined action of the hot air flow and the filter pressure of multiple groups of rollers I and II, the droplets squeezed out of the sludge and infiltrated into the filter belt surface are dried.

[0013] 2. The sludge drying device of the example of the present invention implements heat treatment drying and filter press drying on the sludge while controlling the continuous operation of the two filter belts. The sludge is continuously injected into the storage space and the dried sludge is discharged from the storage space through the sludge inlet bin and the mud particle outlet bin, thereby optimizing the sludge adding, containing and discharging methods, realizing the full process connection of uninterrupted feeding, processing and exporting of sludge, replacing the steps of injecting and exporting sludge into the equipment separately, reducing unnecessary time loss, realizing dynamic and continuous drying of sludge, shortening the sludge drying cycle, and improving the continuous use efficiency of the equipment.

[0014] 3. In the sludge drying device of the example of the present invention, the edge of the end of the filter belt and the transition of the filter belt form a stepped edge, and annular grooves are respectively provided in the middle of the outer sides of the pressure rollers I and II, and the stepped edges are abutted against the edges of the annular grooves. By increasing the number of pressure rollers I and II, the proportion of the area where the two filter belts are continuously compressed is increased, thereby preventing sludge from leaking from the edges.

[0015] 4. In the sludge drying device of the example of the present invention, a magnetic attraction point is arranged on the edge of the end of the filter belt, and the multiple magnetic attraction points on the two filter belts correspond to each other and are connected by magnetic adsorption coupling. The magnetic attraction points can use spherical particles of neodymium magnets or cylindrical neodymium magnets; using the above scheme, the width of the edge can be shortened, thereby increasing the amount of sludge that can be accommodated in the storage space, and improving the efficiency of the equipment for sludge drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 The overall structure of the sludge drying device provided in the embodiment of the present invention is shown in FIG. Figure 1 ; Figure 2 The overall structure of the sludge drying device provided in the embodiment of the present invention is shown in FIG. Figure 2 ; Figure 3 A cross-sectional view of the air intake end and the exhaust end provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of the sludge drying device provided in the embodiment of the present invention Figure 1 ; Figure 5 A schematic diagram of the structure of the sludge drying device provided in the embodiment of the present invention Figure 2 ; Figure 6 For the present invention Figure 5 The enlarged view of point A in the middle; Figure 7 A schematic diagram of the structure of the sludge drying device provided in the embodiment of the present invention Figure 3 ; Figure 8 A partial enlarged view of the filter belt provided in an embodiment of the present invention; Fig. 9 The structural exploded view of the filter belt, the clamping plate, the sludge inlet bin and the sludge particle outlet bin provided in the embodiment of the present invention; Fig.10 A cross-sectional view of a sludge inlet bin and a sludge outlet bin provided in an embodiment of the present invention; Fig.11 A schematic diagram of the structure of the sludge drying device provided in the embodiment of the present invention Figure 4 ; Fig.12 This is a schematic structural diagram of the telescopic frame, pressure roller II and telescopic driver provided in an embodiment of the present invention.

[0017] In the figure: 11, drying cylinder; 12, air inlet end; 13, exhaust end; 131, exhaust pipe; 14, fan blade; 141, gear shaft; 142, motor I; 21, filter belt; 211, storage space; 22, edge; 221, step edge; 23, magnetic attraction point; 31, base; 32, shaft; 33, side extension bracket; 34, pressure roller I; 341, drive shaft; 35, telescopic bracket; 36, pressure roller II; 37, telescopic drive; 41, splint; 42, U-shaped docking seat; 43, sludge inlet bin; 431, discharge notch; 432, pipe I; 44, mud particle outlet bin; 441, scraper inlet edge; 442, pipe II; 45, screw conveyor rod; 451, motor II. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0020] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings.

[0024] Embodiment 1: Figure 1 , Figure 4 , Figure 5 and Figure 7 As shown, this embodiment provides a sludge drying device, including a drying cylinder 11, a filter belt 21, a pressure roller I 34 and a pressure roller II 36; an air inlet end 12 and an exhaust end 13 are respectively provided on both sides of the drying cylinder 11, and two filter belts 21 are provided. The two filter belts 21 are sleeved together and stretched by multiple groups of pressure rollers I 34 and pressure rollers II 36, and are stretched in a zigzag state in the middle of the drying cylinder 11. The edges 22 at the ends of the two filter belts 21 abut against each other to form a sealing structure, and the middle parts of the two filter belts 21 are enclosed to form a storage space 211 for temporarily storing the sludge to be filtered. The cross-section of the storage space 211 is wedge-shaped, with a large spacing in the middle and a small spacing at the ends, so that the sludge is mainly confined to the middle of the storage space 211 to prevent the sludge from leaking from the edge of the storage space 211.

[0025] In this embodiment, the air inlet end 12 and the exhaust end 13 both use an air duct structure, and the end of the air inlet end 12 is connected to an electrically heated air heater or a fuel hot air furnace; the spacing between each group of pressure rollers Ⅰ34 and pressure rollers Ⅱ36 gradually decreases along the sludge conveying direction, and the pressure rollers Ⅰ34 and pressure rollers Ⅱ36 are directly rotatably connected to the inner side of the drying cylinder 11 through a bracket; a plurality of motors are installed on the drying cylinder 11, and the number of motors is consistent with the number of pressure rollers Ⅰ34 and pressure rollers Ⅱ36, which are used to drive the plurality of pressure rollers Ⅰ34 and pressure rollers Ⅱ36 to rotate synchronously.

[0026] like Figure 4 , Figure 5 , Figure 6 , Figure 7 and Fig.10 As shown, multiple groups of rollers I 34 and rollers II 36 divide the storage space 211 into a vertical feeding area and multiple filter pressing areas. A mud particle export bin 44 and a sludge import bin 43 are respectively provided on the upper and lower sides of the vertical feeding area. The outer side surfaces of the sludge import bin 43 and the mud particle export bin 44 are in contact with the surface of the filter belt 21, and a spiral conveying rod 45 is rotatably installed in the mud particle export bin 44.

[0027] like Figure 2 , Figure 4 , Figure 6 and Fig.10As shown, a discharge slot 431 is provided at the middle side of the bottom of the sludge inlet bin 43, a scraper inlet edge 441 is provided at the middle side of the top of the mud particle outlet bin 44, both ends of the sludge inlet bin 43 are connected with pipe I 432, and one end of the mud particle outlet bin 44 is connected with pipe II 442, and both pipe I 432 and pipe II 442 pass through the drying cylinder 11 and extend to the outside of the drying cylinder 11.

[0028] The specific details of using the sludge drying device of the present application to dry the sludge are as follows: 1. injecting sludge into the storage space 211; Install a screw pump or a plunger pump on pipe I 432, run the pump body, and inject sludge with a water content of 65% to 75% into pipe I 432. The sludge flows into the sludge inlet bin 43 along pipe I 432, and is discharged from the middle side of the bottom of the sludge inlet bin 43 to the storage space 211, thereby completing the sludge injection operation in the storage space 211.

[0029] 2. Drying the sludge in the storage space 211 by heat treatment; Hot air is introduced into the air inlet end 12, and the hot air passes through the filter holes on the surface of the filter belt 21 to take away the moisture in the sludge in the storage space 211. Then, the air containing the droplets is discharged from the exhaust end 13. Since the filter belt 21 extends in a tortuous manner, the contact area between the sludge and the filter belt 21 and the hot air flow is greatly increased, thereby improving the drying efficiency of the sludge.

[0030] 3. Drying the sludge in the storage space 211 by combining heat treatment and filter pressing; Multiple motors are started at the same time to drive multiple pressure rollers I34 and pressure rollers II36 to rotate synchronously. Since the spacing between each set of pressure rollers I34 and pressure rollers II36 gradually decreases along the sludge conveying direction, the sludge in the storage space 211 is subjected to step-by-step filter pressure treatment. In addition, under the combined action of the hot air flow and the filter pressure of multiple sets of pressure rollers I34 and pressure rollers II36, the droplets squeezed out of the sludge and infiltrated into the surface of the filter belt 21 are dried.

[0031] 4. discharging the dried sludge from the storage space 211; As the plurality of pressure rollers Ⅰ 34 and Ⅱ 36 rotate, Figure 4 As shown, the two filter belts 21 continuously run counterclockwise, driving the sludge to move synchronously. The sludge after step-by-step filtration moves to the upper side of the mud particle outlet bin 44, enters the mud particle outlet bin 44 from the scraper inlet 441, and then the spiral conveying rod 45 continuously rotates to crush the dried sludge and inject it into the pipe II 442, and finally discharged to the outside of the drying cylinder 11.

[0032] By using the above-mentioned scheme of the present application, while controlling the continuous operation of the two filter belts 21, the sludge is subjected to heat treatment drying and filter pressing drying. Through the sludge inlet bin 43 and the mud particle outlet bin 44, sludge is continuously injected into the storage space 211 and the dried sludge is discharged from the storage space 211. The method of adding, containing and discharging sludge is optimized, and the whole process of uninterrupted feeding, processing and exporting of sludge is achieved. The steps of injecting and exporting sludge into the equipment separately are replaced, unnecessary time loss is reduced, dynamic and continuous drying of sludge is achieved, the sludge drying cycle is shortened, and the continuous use efficiency of the equipment is improved.

[0033] In this embodiment, a step edge 221 is formed at the transition point between the edge 22 at the end of the filter belt 21 and the filter belt 21, and annular grooves are respectively provided in the middle of the outer sides of the pressure rollers I 34 and II 36, and the step edge 221 abuts against the edges of the annular grooves. By increasing the number of pressure rollers I 34 and II 36, the proportion of the area where the two filter belts 21 are continuously compressed is increased, thereby preventing sludge from leaking from the edge 22.

[0034] It should be noted that Figure 7 The width ratio of the edge 22 at the end of the filter belt 21 shown in the figure is for illustration only. The width of the edge 22 is adaptively increased according to the water content and fluidity of the sludge normally treated.

[0035] Embodiment 2: The features of this embodiment that are the same as those of Embodiment 1 are not described in detail. The difference between this embodiment and Embodiment 1 is that: Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, in this embodiment, two clamping plates 41 are provided in the drying cylinder 11, and the clamping plate 41 on one side is detachably fixedly connected to the inner wall of the drying cylinder 11, and the two clamping plates 41 are connected together by four U-shaped docking seats 42, and the four U-shaped docking seats 42 are grouped in pairs, and the two groups of U-shaped docking seats 42 are respectively mounted on the two ends of the sludge inlet bin 43 and the mud particle outlet bin 44.

[0036] like Figure 6 As shown, the inner side surface of the clamp 41 is in contact with the surface of the filter belt 21, and the two ends of the sludge inlet bin 43 and the mud particle outlet bin 44 are located between the two clamps 41. The clamps 41 are used to squeeze and limit the two filter belts 21 from the outside to the inside, so that the filter belt 21 is tightly fitted with the sludge inlet bin 43 and the mud particle outlet bin 44, thereby increasing the sealing of the sludge being injected into the storage space 211 and discharged from the storage space 211.

[0037] The cross-sections of the sludge inlet bin 43 and the mud particle outlet bin 44 are drop-shaped, so that the two filter belts 21 can be easily opened on the upper side of the mud particle outlet bin 44 and gradually closed together on the lower side of the sludge inlet bin 43 .

[0038] Embodiment 3: The features of this embodiment that are the same as those of Embodiment 1 are not described in detail. The difference between this embodiment and Embodiment 1 is that: Figure 7 and Figure 8 As shown, in this embodiment, a magnetic attraction point 23 is provided on the edge 22 of the end of the filter belt 21, and the multiple magnetic attraction points 23 on the two filter belts 21 correspond in position and are connected by magnetic adsorption coupling. The magnetic attraction points 23 can use spherical particles of neodymium magnets or cylindrical neodymium magnets.

[0039] When using neodymium magnet spherical particles; multiple neodymium magnet spherical particles are evenly spaced and embedded into the edge of the end of the filter belt 21, and the magnetic attraction between the neodymium magnet spherical particles on the two filter belts 21 is used to prevent the sludge from leaking from the edge 22; When using cylindrical neodymium magnets, multiple cylindrical neodymium magnets are horizontally embedded into the edge of the end of the filter belt 21, so that the extension direction of the cylindrical neodymium magnets is parallel to the axial direction of the pressure roller I 34 and the pressure roller II 36, ensuring that the filter belt 21 can be bent smoothly.

[0040] Compared with the first embodiment, the sealing of the end edges 22 of the two filter belts 21 is maintained by utilizing the docking and abutment between the annular groove and the stepped edge 221. By using the above-mentioned scheme of this embodiment, the width of the edge 22 can be shortened, thereby increasing the amount of sludge that can be accommodated in the storage space 211 and improving the efficiency of the equipment for sludge drying.

[0041] Embodiment 4: The features of this embodiment that are the same as those of the embodiment 1 are not described in detail. The difference between this embodiment and the embodiment 1 is that: Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, an electric heating module is installed in the drying cylinder 11, and the electric heating module uses an electric heating platform or an electric heating rod. A fan blade 14 is rotatably installed in the air inlet end 12, and a gear shaft 141 is fixedly installed at the end of the fan blade 14. An exhaust pipe 131 is connected to the exhaust end 13, and a motor Ⅰ142 is installed at the lower end of the side of the drying cylinder 11. A driving gear is installed on the output shaft of the motor Ⅰ142, and the driving gear and the gear shaft 141 are connected by a transmission belt.

[0042] The heat generated by the electric heating module is used to dry the sludge in the storage space 211. At the same time, the motor I142 is started to control the rotation of the driving gear. The transmission belt is used to drive the gear shaft 141 and the fan blade 14 to rotate, thereby driving the air flow, and the moisture rising to the hot air inside the drying cylinder 11 is discharged from the exhaust pipe 131 and discharged into the atmosphere after filtering. The sludge drying device of the present application can be used in multiple at the same time, and the exhaust pipes 131 on multiple sludge drying devices are connected. After unified filtering and purification, harmful gases released from the sludge can be prevented from having adverse effects on the environment.

[0043] Embodiment 5: The features of this embodiment that are the same as those of the embodiment 1 are not described in detail. The difference between this embodiment and the embodiment 1 is that: Figure 4 , Figure 5 , Figure 7 and Fig.11 As shown, in this embodiment, two pressure rollers I34 in the same group are rotatably mounted on a side extension bracket 33, and multiple side extension brackets 33 are distributed on the outer circumference of the shaft 32, and the shaft 32 is fixedly mounted on the base 31; a driving shaft 341 is provided at the end of the pressure roller I34, and a motor III for controlling the rotation of the driving shaft 341 is installed on the side extension bracket 33, and the output shaft of the motor III is connected to the driving shaft 341 through a coupling.

[0044] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 and Fig.12 As shown, two pressure rollers II 36 of the same group are mounted on a telescopic frame 35 for rotation together. Multiple telescopic frames 35 are distributed on the inner circumference of the drying cylinder 11. A telescopic driver 37 is installed on the drying cylinder 11 for driving the telescopic frame 35 to move in a direction perpendicular to the axis of the shaft 32.

[0045] Start the motor III on the multiple side extension brackets 33, control the multiple pressure rollers I 34 to rotate synchronously, and drive the two filter belts 21 together with the sludge in the sludge introduction bin 43 to run between the multiple groups of pressure rollers I 34 and pressure rollers II 36. At the same time, start the telescopic drivers 37 corresponding to the multiple telescopic frames 35 respectively, so that the spacing between the multiple telescopic frames 35 and the axis of the shaft rod 32 gradually decreases along the sludge conveying direction, so that the two filter belts 21 are stretched to different degrees in multiple filter pressing areas, and the sludge in the storage space 211 is subjected to step-by-step filter pressing treatment.

[0046] Compared with the first embodiment, the multi-stage sludge filtration intensity is adjusted by setting the distance between each group of pressure rollers Ⅰ34 and pressure rollers Ⅱ36. The above scheme of this embodiment can adjust the sludge filtration intensity in real time. When facing sludge with different water contents, it has strong adaptability and effectively avoids sludge clogging in local positions within the storage space 211.

[0047] The telescopic drive of the present application uses a linear electric cylinder or hydraulic cylinder that can be purchased on the market; the motor uses a Siemens Simotics XP series high-temperature-resistant motor or a NEMA Premium special explosion-proof motor.

[0048] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0049] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. A sludge drying device, comprising a drying cylinder (11), characterized in that: An air inlet end (12) and an air outlet end (13) are respectively provided on both sides of the drying cylinder (11); two mutually sleeved filter belts (21) are provided in the middle of the drying cylinder (11); edges (22) at the ends of the two filter belts (21) abut against each other to form a sealing structure; and the middle parts of the two filter belts (21) are enclosed to form a storage space (211) for temporarily storing the sludge to be filtered; The drying cylinder (11) is provided with a plurality of groups of pressing rollers I (34) and pressing rollers II (36) for maintaining the two filter belts (21) in a tight and fitted state, and for dividing the storage space (211) into a vertical feeding area and a plurality of filter pressing areas. A mud particle outlet bin (44) and a sludge inlet bin (43) are provided on the upper and lower sides of the vertical feeding area, respectively. The outer side surfaces of the sludge inlet bin (43) and the mud particle outlet bin (44) are in contact with the surface of the filter belt (21).

2. The sludge drying device according to claim 1, characterized in that: The bottom of the sludge inlet bin (43) and the top of the mud particle outlet bin (44) are respectively provided with a discharge notch (431) and a scraper inlet edge (441); a pipe I (432) at the end of the sludge inlet bin (43) and a pipe II (442) at the end of the mud particle outlet bin (44) penetrate the drying cylinder (11) and extend outward.

3. The sludge drying device according to claim 2, characterized in that: A screw conveying rod (45) is rotatably mounted in the mud particle outlet bin (44).

4. The sludge drying device according to claim 2, characterized in that: Two clamping plates (41) are arranged in the drying cylinder (11), the inner side surfaces of the clamping plates (41) are in contact with the surface of the filter belt (21), the clamping plate (41) on one side is detachably fixedly connected to the inner wall of the drying cylinder (11), the two clamping plates (41) are connected together via a plurality of U-shaped docking seats (42), and the plurality of U-shaped docking seats (42) are respectively sleeved on both ends of the sludge inlet bin (43) and the sludge particle outlet bin (44).

5. The sludge drying device according to claim 1, characterized in that: A fan blade (14) is rotatably mounted in the air inlet end (12), and an exhaust pipe (131) is connected to the exhaust end (13).

6. The sludge drying device according to claim 1, characterized in that: Two pressure rollers I (34) in the same group are rotatably mounted on a side extension bracket (33) together, and a plurality of side extension brackets (33) are distributed on the outer circumference of the shaft (32), and the shaft (32) is fixedly mounted on the base (31).

7. The sludge drying device according to claim 1, characterized in that: Two pressure rollers II (36) of the same group are mounted on a telescopic frame (35) for joint rotation. A plurality of telescopic frames (35) are distributed on the inner circumference of the drying cylinder (11). A telescopic driver (37) is mounted on the drying cylinder (11) for driving the telescopic frame (35) to move in a direction perpendicular to the axis of the shaft (32).

8. The sludge drying device according to claim 1, characterized in that: A magnetic attraction point (23) is provided on the edge (22) of the end of the filter belt (21); the multiple magnetic attraction points (23) on the two filter belts (21) correspond in position and are connected by magnetic attraction coupling.

9. The sludge drying device according to claim 1, characterized in that: The edge (22) at the end of the filter belt (21) forms a stepped edge (221) at the transition point with the filter belt (21), and an annular groove is provided in the middle of the outer sides of the pressure roller I (34) and the pressure roller II (36), respectively, and the stepped edge (221) abuts against the edge of the annular groove.

10. The sludge drying device according to claim 1, characterized in that: The cross section of the storage space (211) is wedge-shaped, with a large spacing in the middle and a small spacing at the ends.

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