Drying device for sludge treatment

Abstract

The invention provides a drying device for sludge treatment, which comprises a drying case assembly and a pre-dehydration mechanism, the drying case assembly comprises a main frame, an upper conveying frame, a lower conveying frame and an upper support; wherein the upper support is fixedly connected to one side of the upper surface of the main machine frame, the lower conveying frame is installed at the bottom of the inner side wall of the upper support, and the upper conveying frame is installed at the top of the lower conveying frame; the pre-dewatering mechanism is driven by the driving mechanism to convey sludge needing to be dried, the sludge is extruded and dewatered by the pre-dewatering mechanism in the conveying process so as to preliminarily reduce the water content of the sludge, and then the sludge is extruded and granulated by matching the pre-dewatering mechanism with the granulating mechanism, so that the water content of the sludge is greatly reduced. In addition, the sludge drying device is high in overall structure integration degree, all the structures are closely connected, the space occupied by the whole equipment is effectively reduced, and the use cost of the equipment is saved.

Description

Technical Field

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

[0002] Sludge drying refers to the process of reducing the water content in sludge by physical or chemical methods, transforming it from a liquid or semi-solid state to a solid state. It is an indispensable part of the sewage treatment process. It reduces the volume and weight of sludge for transportation; kills pathogens, parasites and bacteria in the sludge, reduces the risk of disease transmission, and stabilizes and renders the sludge harmless. Dried sludge can be used as fuel, or as raw material for products such as fertilizers and building materials, achieving resource reuse. Sludge drying is of great significance in promoting environmental protection, resource recycling, urban sanitation improvement, and economic development. The Chinese patent, entitled "A Sludge Low-Temperature Drying System and Drying Method" (publication number CN114751618A), discloses a sludge low-temperature drying technology. Using compressed air as the gas source, a vortex tube is used to convert normal compressed air into a cold air source (below -20°C) and a hot air source (not less than 100°C). The gas source is easy to obtain, and the energy is clean, safe and pollution-free. The sludge is first completely frozen by the cold-end gas source, and then the frozen and crushed sludge is heated and preliminarily dehydrated by the hot-end gas source. The hot sludge then enters the plate and frame filter press heated by the hot-end gas source for filtration and dehydration. Although the system has the characteristics of high energy utilization, high drying efficiency, low cost and high return, the various devices in the system are relatively independent of each other, which not only leads to a high overall cost of the system, but also the water vapor generated by the heating cannot be effectively recovered during the sludge heating and dehydration process, posing a risk of environmental pollution.

[0003] The Chinese patent title is "A dehumidification and dehydration device for low-temperature drying of sludge" (publication number CN215667687U), which discloses a dehumidification and dehydration technology for low-temperature drying of sludge. Air is injected into a vortex chamber along the air outlet pipe through an air compressor. The vortex chamber discharges hot air from the hot air pipe and discharges cold air from the cold air pipe into a cooling ring. The hot air pipe injects hot air into the heat sink through a conduit. The heat sink dissipates heat and the sludge on the storage plate is dehydrated. Its water vapor enters the recovery pipe along the shell. When the water vapor passes through the cooling ring end, the water vapor is cooled and liquefied and falls into the water collection tank. However, although the device can use the cold air generated by the vortex chamber to recover water vapor, its overall structure is too simple and lacks pretreatment of the sludge. There are problems of low drying efficiency and low water vapor recovery efficiency.

[0004] Therefore, a drying device for sludge treatment is proposed. Summary of the Invention

[0005] In view of this, the present invention provides a drying device for sludge treatment to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the embodiment of the present invention is implemented as follows: a drying device for sludge treatment, comprising a drying chassis assembly and a pre-dehydration mechanism, wherein the drying chassis assembly comprises a main frame, an upper conveying frame, a lower conveying frame and an upper bracket; wherein, the upper bracket is fixedly connected to one side of the upper surface of the main frame, the lower conveying frame is installed at the bottom of the inner side wall of the upper bracket, the upper conveying frame is installed on the top of the lower conveying frame, the pre-dehydration mechanism is installed inside the upper conveying frame, a driving mechanism is installed on one side of the upper surface of the upper bracket, a drying and conveying mechanism is installed inside the main frame, an air-type drying mechanism is installed on one side of the main frame, a granulating mechanism is installed on one side of the pre-dehydration mechanism, a pre-cooling and conveying mechanism is installed inside the lower conveying frame, and a water vapor recovery mechanism is installed on the other side of the upper surface of the main frame; The pre-dehydration mechanism is used to squeeze and dehydrate the sludge, and cooperates with the granulation mechanism to granulate the dehydrated sludge; The air drying mechanism is used to inject cold air and hot air into the interior of the lower conveying frame and the main frame respectively, so as to cooperate with the pre-cooling conveying mechanism to pre-cool the sludge particles, and cooperate with the drying conveying mechanism to heat and dry the sludge particles after pre-cooling. The water vapor recovery mechanism is used to extract the water vapor generated by heating and drying the sludge to form a spiral airflow, and cooperate with the used cold air in the lower conveying rack to cool and liquefy the water vapor in the spiral airflow.

[0007] Further preferably, the pre-dehydration mechanism includes a water filter cartridge, a first auger column, a conical cartridge, a cylindrical frame and a plurality of breathable steel filter plates; Among them, the water filter cartridge is fixedly connected to one side of the inner wall of the upper conveying rack, the cylindrical rack is fixedly connected to the other side of the inner wall of the upper conveying rack, the conical cylinder is connected between the water filter cartridge and the cylindrical rack, the first auger column is rotatably connected to the water filter cartridge, the conical cylinder and the inner wall of the cylindrical rack, and several of the breathable steel filter plates are installed on the side of the inner wall of the cylindrical rack close to the conical cylinder.

[0008] Further preferably, the granulation mechanism includes a carrier frame, a disc frame, a sleeve frame, a plurality of scrapers, a plurality of extrusion holes, a guide frame, a pressure column and a spring; wherein the carrier is fixedly connected to one end of the cylindrical frame away from the conical cylinder, the disc frame is rotatably connected to one side of the carrier frame, one end of the first auger column extends to one side of the upper conveying frame and is fixedly connected to the inner side wall of the disc frame, the sleeve frame is sleeved on the outer side wall of the cylindrical frame, several of the scrapers are fixedly connected between the disc frame and the sleeve frame, several of the extrusion holes are opened on one side of the outer side wall of the cylindrical frame, the guide frame is fixedly connected to one side of the carrier frame, one side of the outer side wall of the first auger column is rotatably connected to the inner side wall of the carrier frame and the guide frame, the pressure column is slidably connected between the inner side wall of the cylindrical frame and the outer side wall of the guide frame, one end of the spring is fixedly connected to the inner side wall of the pressure column, and the other end of the spring is fixedly connected to one side of the guide frame.

[0009] Further preferably, the pre-cooling conveying mechanism includes a third auger, a cooling inner cylinder, a material distribution hopper, a pre-cooling chamber and a connecting frame; Among them, the cooling inner cylinder is fixedly connected to one side of the inner wall of the lower conveyor frame, the pre-cooling chamber is opened between the outer wall of the cooling inner cylinder and the inner wall of the lower conveyor frame, the third auger is rotatably connected to the lower conveyor frame and the inner wall of the cooling inner cylinder, the connecting frame is installed at one end of the upper conveyor frame and the lower conveyor frame, and the material hopper is connected between the lower conveyor frame and the main frame.

[0010] Further preferably, the driving mechanism includes a reduction motor, a first pulley, a second pulley, a first transmission belt, a third pulley, a second transmission belt and a gear; wherein the reduction motor is mounted on one side of the upper surface of the upper bracket, the first pulley is fixedly connected to the output shaft of the reduction motor, the second pulley is rotatably connected to one side of the upper conveying frame, one end of the second pulley is fixedly connected to one end of the first auger column, the first transmission belt is sleeved on the outer walls of the first pulley and the second pulley, the third pulley is rotatably connected to one side of the lower conveying frame, the second transmission belt is sleeved on the outer walls of the second pulley and the third pulley, the outer wall of the gear is meshed with one side of the outer wall of the third pulley, and one end of the third auger passes through the inner wall of the lower conveying frame and is fixedly connected to one end of the gear.

[0011] Further preferably, the drying and conveying mechanism includes an inner support, a plurality of conveyor belts, a plurality of rollers and a plurality of second motors; Among them, the inner bracket is installed on the inner side wall of the main frame, several of the conveyor belts are staggered up and down on the inner side wall of the inner bracket, several of the rollers are rotatably connected to the inner side wall of the inner bracket, several of the conveyor belts are respectively covered on the outer side walls of two horizontally arranged rollers, several of the second motors are installed on one side of the inner bracket, and the output shafts of several of the second motors are respectively fixedly connected to one end of several of the rollers.

[0012] Further preferably, the air drying mechanism includes an air compressor, a plurality of air delivery pipes, a plurality of vortex tubes, a plurality of cooling pipes, a plurality of heating pipes and a plurality of air distribution pipe racks; In which, the air compressor is installed on one side of the main frame, one end of several of the air pipes are connected to the exhaust port of the air compressor, several of the vortex tubes are installed in the middle of one side of the main frame, the other ends of several of the air pipes are respectively connected to the air inlets of several of the vortex tubes, one ends of several of the cooling pipes are respectively connected to the cold air ends of several of the vortex tubes, the other ends of several of the cooling pipes are connected to the pre-cooling cavity, one ends of several of the heating pipes are respectively connected to the hot air ends of several of the vortex tubes, several of the air distribution pipe racks are installed in the inner bracket, and the other ends of several of the heating pipes are respectively connected to one side of several of the air distribution pipe racks.

[0013] Further preferably, a feeding mechanism is installed on one side of the main frame, and the feeding mechanism includes a side bracket, a feeding hopper, a feeding pipe, a third motor, a second auger column and a discharge pipe; In which, the side bracket is installed on one side of the main frame, the upper hopper is installed on one side of the side bracket, the conveying pipe is fixedly connected to the inner wall of the side bracket, the third motor is installed at one end of the conveying pipe, the second auger column is rotatably connected to the inner wall of the side bracket, the output shaft of the third motor is fixedly connected to one end of the second auger column, one side of the upper hopper is connected to the bottom of the outer wall of the conveying pipe, one end of the discharge pipe is connected to the top of the outer wall of the conveying pipe, and the other end of the discharge pipe is connected to the inside of the upper conveying frame.

[0014] Further preferably, the water vapor recovery mechanism includes a recovery box, a conical recovery drum, a spiral rack, an exhaust filter cartridge, a steam transmission pipe, an exhaust fan and a cooling pipe; In which, the recovery box is installed on one side of the upper surface of the main frame, the conical recovery drum is fixedly connected to the middle of the inner wall of the recovery box, the spiral frame is fixedly connected to the inner wall of the conical recovery drum, the exhaust filter drum is installed in the middle of the inner wall of the conical recovery drum, the exhaust fan is installed on one side of the inner bracket, one end of the steam pipe is connected to the exhaust port of the exhaust fan, the other end of the steam pipe passes through the inner wall of the recovery box and is connected to the top of the outer wall of the conical recovery drum, one end of the cooling pipe is connected to the bottom of the outer wall of the recovery box, and the other end of the cooling pipe is connected to the pre-cooling chamber.

[0015] Further preferably, a protective cover is installed in the middle of the upper surface of the recovery box, an air duct is connected to one side of the top of the outer wall of the recovery box, a skid-mounted base frame is installed at the bottom of the main frame, a first waste water pipe is connected to one side of the upper conveying frame, and a second waste water pipe is connected to the bottom of the outer wall of the conical recovery cylinder, and the other end of the second waste water pipe passes through the outer wall of the recovery box.

[0016] The embodiment of the present invention adopts the above technical solution, which has the following advantages: The present invention drives the pre-dehydration mechanism through a driving mechanism to transport the sludge that needs to be dried, and uses the pre-dehydration mechanism to squeeze and dehydrate the sludge during the transportation process to preliminarily reduce the water content of the sludge. The pre-dehydration mechanism is then used in conjunction with the granulation mechanism to extrude and granulate the sludge so that the sludge can be quickly dried subsequently. The overall structure of the present invention has a high degree of integration and the various structures are closely connected, which effectively reduces the space occupied by the entire equipment and saves the use cost of the equipment.

[0017] The present invention injects cold air and hot air into the interior of the lower conveying frame and the main frame respectively through an air drying mechanism, so as to cooperate with the pre-cooling conveying mechanism to pre-cool the sludge particles. Then, the pre-cooling conveying mechanism uses the power of the driving mechanism to push the pre-cooled sludge particles into the interior of the main frame, so that the sludge particles can be transported by the drying conveying mechanism while being quickly dried by the injected hot air.

[0018] The present invention extracts the water vapor generated by heating in the main frame through a water vapor recovery mechanism and forms a spiral airflow. Then, the cold air used in the lower conveying rack is guided out through the water vapor recovery mechanism. While ensuring the normal circulation of the cold air in the lower conveying rack, the cold air is used to cool and liquefy the water vapor in the spiral airflow in the water vapor recovery mechanism, so that the water vapor can be liquefied and recovered, thereby effectively improving the efficiency of water vapor recovery.

[0019] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 It is a structural diagram of the present invention; Figure 2 It is a schematic cross-sectional structural diagram of the present invention from a first viewing angle; Figure 3 It is a side structural schematic diagram of the present invention; Figure 4 Schematic diagram of the cross-sectional structure of the side bracket of the present invention; Figure 5 is a schematic cross-sectional structural diagram of the present invention from a second viewing angle; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of area A; Figure 7 For the present invention Figure 5 A magnified schematic diagram of the structure of region B; Figure 8 is an axonometric view of the side bracket of the present invention; Figure 9 This is an axonometric view of the upper bracket of the present invention; Figure 10 is an axonometric view of the air compressor of the present invention; Figure 11 It is a schematic cross-sectional structural diagram of the inner support of the present invention.

[0022] 1. Drying chassis assembly; 2. Pre-dehydration mechanism; 3. Driving mechanism; 4. Drying conveying mechanism; 5. Air drying mechanism; 6. Loading mechanism; 7. Granulating mechanism; 8. Pre-cooling conveying mechanism; 9. Water vapor recovery mechanism; 101. Main frame; 102. Upper conveying frame; 103. Lower conveying frame; 104. Upper bracket; 201. Water filter cartridge; 202. First auger column; 203. Conical cylinder; 204. Cylindrical frame; 205. Breathable steel filter plate; 301. Speed reducer; 302. First pulley; 303. Second pulley; 304. First transmission belt; 305. Third pulley; 306. Second transmission belt; 307. Gear; 401. Inner bracket; 402. Conveyor belt; 403. Roller; 404. Second motor; 501. Air compressor; 502. Air pipe; 503. Vortex tube; 504, cooling pipe; 505, heating pipe; 506, gas distribution pipe rack; 601, side bracket; 602, upper hopper; 603, feeding pipe; 604, third motor; 605, second auger column; 606, discharge pipe; 701, bearing frame; 702, plate rack; 703, casing rack; 704, scraper; 705, extrusion hole; 706, guide frame; 707, pressure column; 708, spring; 801, first Three-auger; 802, cooling inner tube; 803, distribution hopper; 804, pre-cooling chamber; 805, connecting frame; 901, recovery box; 902, conical recovery tube; 903, spiral frame; 904, exhaust filter cartridge; 905, steam transmission pipe; 906, exhaust fan; 907, cooling pipe; 911, protective cover; 912, air duct; 913, skid-mounted base frame; 914, first wastewater pipe; 915, second wastewater pipe. DETAILED DESCRIPTION

[0023] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0024] It should be noted that the terms "first," "second," "symmetrical," and "array" are used solely for descriptive and positional purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Therefore, limitations on features such as "first" and "symmetrical" may explicitly or implicitly include one or more of these features. Similarly, when features are not limited in quantity using words such as "two" or "three," it should be noted that these features also explicitly or implicitly include one or more of these features.

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] like Figures 1-11 As shown, an embodiment of the present invention provides a drying device for sludge treatment, including a drying chassis assembly 1 and a pre-dehydration mechanism 2. The drying chassis assembly 1 includes a main frame 101, an upper conveying frame 102, a lower conveying frame 103 and an upper bracket 104; Among them, the upper bracket 104 is fixedly connected to one side of the upper surface of the main frame 101, the lower conveying frame 103 is installed at the bottom of the inner side wall of the upper bracket 104, the upper conveying frame 102 is installed on the top of the lower conveying frame 103, the pre-dehydration mechanism 2 is installed inside the upper conveying frame 102, the driving mechanism 3 is installed on one side of the upper surface of the upper bracket 104, the drying and conveying mechanism 4 is installed inside the main frame 101, the air drying mechanism 5 is installed on one side of the main frame 101, the granulation mechanism 7 is installed on one side of the pre-dehydration mechanism 2, the pre-cooling and conveying mechanism 8 is installed inside the lower conveying frame 103, and the water vapor recovery mechanism 9 is installed on the other side of the upper surface of the main frame 101; The pre-dehydration mechanism 2 is used to squeeze and dehydrate the sludge, and cooperates with the granulation mechanism 7 to granulate the dehydrated sludge; The air drying mechanism 5 is used to inject cold air and hot air into the interior of the lower conveyor frame 103 and the main frame 101 respectively, so as to cooperate with the pre-cooling conveyor mechanism 8 to pre-cool the sludge particles, and cooperate with the drying conveyor mechanism 4 to heat and dry the pre-cooled sludge particles. The water vapor recovery mechanism 9 is used to extract the water vapor generated by heating and drying the sludge to form a spiral airflow, and cooperate with the used cold air in the lower conveying rack 103 to cool and liquefy the water vapor in the spiral airflow.

[0027] In one embodiment, the pre-dehydration mechanism 2 includes a water filter cartridge 201, a first auger column 202, a conical cartridge 203, a cylindrical frame 204, and a plurality of breathable steel filter plates 205; Among them, the water filter cartridge 201 is fixedly connected to one side of the inner wall of the upper conveying rack 102, the cylindrical rack 204 is fixedly connected to the other side of the inner wall of the upper conveying rack 102, the conical cylinder 203 is connected between the water filter cartridge 201 and the cylindrical rack 204, the first auger column 202 is rotatably connected to the water filter cartridge 201, the conical cylinder 203 and the inner wall of the cylindrical rack 204, and several breathable steel filter plates 205 are all installed on the inner wall of the cylindrical rack 204 close to the side of the conical cylinder 203.

[0028] The sludge entering the upper conveying rack 102 is pushed by the rotating first auger column 202, and then the water in the sludge is preliminarily filtered out by the provided water filter cartridge 201. The sludge pushed out of the water filter cartridge 201 is then introduced into the cylindrical rack 204 through the conical cylinder 203, and the sludge pushed in the cylindrical rack 204 is blocked by the granulation mechanism 7 so that the sludge is gathered on one side of the granulation mechanism 7 for extrusion. The water squeezed out of the sludge is then filtered by the provided breathable steel filter plate 205, and the sludge particles carried in the water are intercepted so that the sludge can be dehydrated by extrusion.

[0029] In one embodiment, the granulation mechanism 7 includes a carrier frame 701, a disc frame 702, a sleeve frame 703, a plurality of scrapers 704, a plurality of extrusion holes 705, a guide frame 706, a pressure column 707 and a spring 708; Among them, the carrier 701 is fixedly connected to the end of the cylindrical frame 204 away from the conical cylinder 203, the disc frame 702 is rotatably connected to one side of the carrier 701, one end of the first auger column 202 extends to one side of the upper conveying frame 102 and is fixedly connected to the inner side wall of the disc frame 702, the sleeve frame 703 is sleeved on the outer side wall of the cylindrical frame 204, a number of scrapers 704 are fixedly connected between the disc frame 702 and the sleeve frame 703, and a number of extrusion holes 705 are opened on the cylindrical frame 204. On one side of the outer wall of the cylindrical frame 204, the guide frame 706 is fixedly connected to one side of the supporting frame 701, and one side of the outer wall of the first auger column 202 is rotatably connected to the inner wall of the supporting frame 701 and the guide frame 706. The pressure column 707 is slidably connected between the inner wall of the cylindrical frame 204 and the outer wall of the guide frame 706. One end of the spring 708 is fixedly connected to the inner wall of the pressure column 707, and the other end of the spring 708 is fixedly connected to one side of the guide frame 706.

[0030] The pressure-bearing column 707 slides along the guide frame 706 under the action of pressure, and drives the spring 708 to be compressed. When the pressure-bearing column 707 moves to one side of the extrusion hole 705, the dehydrated sludge is squeezed out of the extrusion hole 705 by utilizing pressure. At the same time, the rotating first auger column 202 drives the scraper 704 to rotate using the disc frame 702, and the rotating scraper 704 cuts the sludge strips squeezed out of the extrusion hole 705 to form sludge particles.

[0031] In one embodiment, the pre-cooling conveying mechanism 8 includes a third auger 801, a cooling inner cylinder 802, a material distribution hopper 803, a pre-cooling chamber 804 and a connecting frame 805; Among them, the cooling inner cylinder 802 is fixedly connected to one side of the inner wall of the lower conveyor frame 103, the pre-cooling chamber 804 is opened between the outer wall of the cooling inner cylinder 802 and the inner wall of the lower conveyor frame 103, the third auger 801 is rotatably connected to the lower conveyor frame 103 and the inner wall of the cooling inner cylinder 802, the connecting frame 805 is installed at one end of the upper conveyor frame 102 and the lower conveyor frame 103, and the material hopper 803 is connected between the lower conveyor frame 103 and the main frame 101.

[0032] The sludge particles falling from the connecting frame 805 are pushed into the cooling inner cylinder 802 by the rotating third auger 801, so that the cooling inner cylinder 802 can quickly absorb the heat of the sludge particles and pre-freeze them. Then, the sludge particles pre-frozen in the cooling inner cylinder 802 are introduced into the main frame 101 through the provided distribution hopper 803.

[0033] In one embodiment, the driving mechanism 3 includes a reduction motor 301, a first pulley 302, a second pulley 303, a first transmission belt 304, a third pulley 305, a second transmission belt 306 and a gear 307; Among them, the reduction motor 301 is installed on one side of the upper surface of the upper bracket 104, the first pulley 302 is fixedly connected to the output shaft of the reduction motor 301, the second pulley 303 is rotatably connected to one side of the upper conveying frame 102, one end of the second pulley 303 is fixedly connected to one end of the first auger column 202, the first transmission belt 304 is sleeved on the outer wall of the first pulley 302 and the second pulley 303, the third pulley 305 is rotatably connected to one side of the lower conveying frame 103, the second transmission belt 306 is sleeved on the outer wall of the second pulley 303 and the third pulley 305, the outer wall of the gear 307 is meshed with one side of the outer wall of the third pulley 305, and one end of the third auger 801 passes through the inner wall of the lower conveying frame 103 and is fixedly connected to one end of the gear 307.

[0034] The output shaft of the reduction motor 301 drives the first pulley 302 to rotate, the rotating first pulley 302 drives the second pulley 303 to rotate via the first transmission belt 304, the rotating second pulley 303 drives the first auger column 202 and the second transmission belt 306 to move, the moving second transmission belt 306 drives the third pulley 305 to rotate, and the rotating third pulley 305 drives the gear 307 to rotate via the tooth pattern.

[0035] In one embodiment, the drying and conveying mechanism 4 includes an inner support 401, a plurality of conveying belts 402, a plurality of rollers 403 and a plurality of second motors 404; Among them, the inner bracket 401 is installed on the inner wall of the main frame 101, several conveyor belts 402 are arranged in an upper and lower staggered manner on the inner wall of the inner bracket 401, several rollers 403 are rotatably connected to the inner wall of the inner bracket 401, several conveyor belts 402 are respectively covered on the outer walls of two horizontally arranged rollers 403, several second motors 404 are installed on one side of the inner bracket 401, and the output shafts of several second motors 404 are respectively fixedly connected to one end of several rollers 403.

[0036] The output shaft of the second motor 404 drives the roller 403 to rotate, and the rotating roller 403 drives the conveyor belt 402 to rotate, and the rotating conveyor belt 402 conveys the sludge particles.

[0037] In one embodiment, the air drying mechanism 5 includes an air compressor 501, a plurality of air supply pipes 502, a plurality of vortex tubes 503, a plurality of cooling pipes 504, a plurality of heating pipes 505, and a plurality of air distribution pipe racks 506. Among them, the air compressor 501 is installed on one side of the main frame 101, one end of several air pipes 502 are connected to the exhaust port of the air compressor 501, several vortex tubes 503 are installed in the middle of one side of the main frame 101, the other ends of several air pipes 502 are respectively connected to the air inlets of several vortex tubes 503, one ends of several cooling pipes 504 are respectively connected to the cold air ends of several vortex tubes 503, the other ends of several cooling pipes 504 are all connected to the pre-cooling chamber 804, one ends of several heating pipes 505 are respectively connected to the hot air ends of several vortex tubes 503, several air distribution pipe racks 506 are installed in the inner bracket 401, and the other ends of several heating pipes 505 are respectively connected to one side of several air distribution pipe racks 506.

[0038] The air compressor 501 uses the air pipe 502 to inject high-pressure air into the air inlet of the vortex tube 503, and then the vortex tube 503 is used to divide the airflow into two cold and hot airflows. The cold airflow discharged from the cold air end of the vortex tube 503 is guided into the pre-cooling chamber 804 through the cooling pipe 504, so that the cold airflow can absorb the heat of the cooling inner cylinder 802 and cool it down. The hot airflow discharged from the hot air end of the vortex tube 503 is then guided to the air distribution pipe rack 506 through the heating pipe 505, so that the air distribution pipe rack 506 can evenly spray the hot airflow into the interior of the inner bracket 401 to preheat the inner bracket 401.

[0039] In one embodiment, a feeding mechanism 6 is installed on one side of the main frame 101, and the feeding mechanism 6 includes a side bracket 601, a feeding hopper 602, a feeding pipe 603, a third motor 604, a second auger column 605 and a discharge pipe 606; Among them, the side bracket 601 is installed on one side of the main frame 101, the upper hopper 602 is installed on one side of the side bracket 601, the feed pipe 603 is fixedly connected to the inner wall of the side bracket 601, the third motor 604 is installed on one end of the feed pipe 603, the second auger column 605 is rotatably connected to the inner wall of the side bracket 601, the output shaft of the third motor 604 is fixedly connected to one end of the second auger column 605, one side of the upper hopper 602 is connected to the bottom of the outer wall of the feed pipe 603, one end of the discharge pipe 606 is connected to the top of the outer wall of the feed pipe 603, and the other end of the discharge pipe 606 is connected to the inside of the upper conveying frame 102.

[0040] The output shaft of the third motor 604 drives the second auger column 605 to rotate, and the rotating second auger column 605 pushes the sludge in the upper hopper 602 into the feed pipe 603 and lifts it, and then the lifted sludge in the feed pipe 603 is discharged to the upper conveying rack 102 through the discharge pipe 606.

[0041] In one embodiment, the water vapor recovery mechanism 9 includes a recovery box 901, a conical recovery drum 902, a spiral rack 903, an exhaust filter cartridge 904, a steam transmission pipe 905, an exhaust fan 906 and a cooling pipe 907; Among them, the recovery box 901 is installed on one side of the upper surface of the main frame 101, the conical recovery cylinder 902 is fixedly connected to the middle part of the inner wall of the recovery box 901, the spiral frame 903 is fixedly connected to the inner wall of the conical recovery cylinder 902, the exhaust filter cartridge 904 is installed in the middle part of the inner wall of the conical recovery cylinder 902, the exhaust fan 906 is installed on one side of the inner bracket 401, one end of the steam pipe 905 is connected to the exhaust port of the exhaust fan 906, the other end of the steam pipe 905 passes through the inner wall of the recovery box 901 and is connected to the top of the outer wall of the conical recovery cylinder 902, one end of the cooling pipe 907 is connected to the bottom of the outer wall of the recovery box 901, and the other end of the cooling pipe 907 is connected to the pre-cooling chamber 804; A protective cover 911 is installed in the middle of the upper surface of the recovery box 901, an air duct 912 is connected to the top side of the outer wall of the recovery box 901, a skid-mounted base frame 913 is installed at the bottom of the main frame 101, a first waste water pipe 914 is connected to one side of the upper conveying rack 102, and a second waste water pipe 915 is connected to the bottom of the outer wall of the conical recovery cylinder 902. The other end of the second waste water pipe 915 passes through the outer wall of the recovery box 901.

[0042] The water vapor in the inner bracket 401 is extracted by the exhaust fan 906, and the water vapor is injected into the conical recovery cylinder 902 through the steam pipe 905. Then, the water vapor is formed into a spiral airflow in the conical recovery cylinder 902 through the provided spiral rack 903 and the exhaust filter cartridge 904. The used cold air in the pre-cooling chamber 804 is introduced into the recovery box 901 through the cooling pipe 907 to cool the conical recovery cylinder 902, so that the water vapor in the spiral airflow contacts the conical recovery cylinder 902 and is cooled and liquefied.

[0043] When the present invention is working: the device is installed as a whole to a designated position according to actual needs. When the sludge needs to be dried, first, the air compressor 501 uses the air pipe 502 to inject high-pressure air into the air inlet of the vortex tube 503, and then the vortex tube 503 is used to make the incoming high-speed air flow enter the vortex chamber from the tangential direction to form a free vortex, and to generate friction between the vortex layers with different angular velocities. Among them, the angular velocity of the air flow in the center is the largest, and the friction is used to transfer energy to the air flow with low angular velocity in the outer layer, so that the air flow in the center is the largest. The air flow temperature is lowered to form a cold air flow, while the outer air flow obtains energy to form a hot air flow. Then, the cold air flow discharged from the cold air end of the vortex tube 503 is guided into the pre-cooling chamber 804 through the cooling pipe 504, so that the cold air flow can absorb the heat of the cooling inner cylinder 802 and cool it down. Then, the hot air flow discharged from the hot air end of the vortex tube 503 is guided into the air distribution pipe rack 506 through the heating pipe 505, so that the air distribution pipe rack 506 can evenly spray the hot air flow into the interior of the inner bracket 401 to preheat the inner bracket 401.

[0044] When the cooling of the cooling inner cylinder 802 is completed and the preheating of the inner bracket 401 is completed, the sludge that needs to be dried is temporarily stored in the upper hopper 602, and then the output shaft of the third motor 604 drives the second auger column 605 to rotate. The rotating second auger column 605 pushes the sludge in the upper hopper 602 into the feed pipe 603 and lifts it. Then, the lifted sludge in the feed pipe 603 is discharged to the upper conveying rack 102 through the discharge pipe 606 for loading the sludge.

[0045] When the loading operation is completed, the output shaft of the reduction motor 301 drives the first pulley 302 to rotate, and the rotating first pulley 302 drives the second pulley 303 to rotate via the first transmission belt 304, and the rotating second pulley 303 drives the first auger column 202 and the second transmission belt 306 to move, and the moving second transmission belt 306 drives the third pulley 305 to rotate, and the rotating third pulley 305 drives the gear 307 to rotate via the tooth pattern. The rotating first auger column 202 pushes the sludge entering the upper conveying rack 102, and then the water in the sludge is preliminarily filtered out by the provided water filter cartridge 201, and then the sludge pushed out of the water filter cartridge 201 is introduced into the cylindrical rack 204 through the conical cylinder 203, and the sludge pushed in the cylindrical rack 204 is blocked by the pressure column 707, so that the sludge is gathered on one side of the pressure column 707 for squeezing, and then the water squeezed out of the sludge is filtered by the provided breathable steel filter plate 205, and the sludge particles carried in the water are intercepted so that the sludge can be dehydrated by squeezing to further reduce the water content of the sludge.

[0046] When the pressure at the pressure column 707 reaches the bearing limit of the spring 708, the pressure column 707 slides along the guide frame 706 under the action of pressure, and drives the spring 708 to compress. When the pressure column 707 moves to one side of the extrusion hole 705, the dehydrated sludge is squeezed out of the extrusion hole 705 by using pressure. At the same time, the rotating first auger column 202 drives the scraper 704 to rotate using the disc frame 702, and the rotating scraper 704 cuts the sludge strips squeezed out of the extrusion hole 705 to form sludge particles, and make the sludge particles fall into the connecting frame 805 under the action of gravity; at the same time, the rotating gear 307 drives the third auger 801 to rotate, and the rotating third auger 801 pushes the sludge particles falling from the connecting frame 805 into the cooling inner cylinder 802, so that the cooling inner cylinder 802 can quickly absorb the heat of the sludge particles and pre-freeze them. Then, the pre-frozen sludge particles in the cooling inner cylinder 802 are introduced into the main frame 101 and the inner bracket 401 through the provided distribution hopper 803.

[0047] When the sludge particles enter the inner bracket 401, the output shaft of the second motor 404 drives the roller 403 to rotate, and the rotating roller 403 drives the conveyor belt 402 to rotate. The rotating conveyor belt 402 transports the sludge particles, and utilizes the staggered conveyor belts 402 with different movement directions to transport the sludge particles back and forth to increase the time the sludge particles stay in the main frame 101. At the same time, the hot air flow discharged from the air distribution pipe rack 506 is used to heat and dry the sludge particles, so that the residual water in the sludge particles is vaporized, and then the sludge particles after the drying process are discharged through the conveyor belt 402 located at the bottom layer of the inner bracket 401 so that they can be collected centrally.

[0048] When the sludge in the inner bracket 401 is heated and dried to produce water vapor, the water vapor in the inner bracket 401 is extracted through the exhaust fan 906, and the water vapor is injected into the conical recovery drum 902 through the steam pipe 905. Then, the water vapor is formed into a spiral airflow in the conical recovery drum 902 through the provided spiral rack 903 and the exhaust filter cartridge 904, so that the water vapor in the airflow is fully in contact with the inner wall of the conical recovery drum 902 by centrifugal force. At the same time, the used cold air in the pre-cooling chamber 804 is introduced into the recovery box 901 through the cooling pipe 907. Under the premise of ensuring that the cold air flow circulates normally in the pre-cooling chamber 804, the used cold air flow is used to absorb the heat of the conical recovery drum 902 to cool the conical recovery drum 902 so that the water vapor in the airflow is cooled and liquefied. Then, the treated air in the conical recovery drum 902 is discharged through the exhaust filter cartridge 904.

[0049] The second wastewater pipe 915 is used to discharge the condensate collected at the bottom of the conical recovery cylinder 902, the air duct 912 is used to discharge the used cold air in the recovery box 901, the first wastewater pipe 914 is used to discharge the sewage separated in the upper conveying rack 102, the protective cover 911 is used to prevent rainwater from directly entering the interior of the exhaust filter cylinder 904, the skid-mounted base frame 913 is used to skid-mount the drying chassis assembly 1, pre-dehydration mechanism 2, drive mechanism 3, drying conveying mechanism 4, air drying mechanism 5, granulation mechanism 7, pre-cooling conveying mechanism 8 and water vapor recovery mechanism 9 as a whole, and the side bracket 601 is used to skid-mount the loading mechanism 6 as a whole, so that the entire device is easy to disassemble and assemble.

[0050] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A drying device for sludge treatment, comprising a drying chassis assembly (1) and a pre-dehydration mechanism (2), characterized in that: The drying chassis assembly (1) comprises a main frame (101), an upper conveying frame (102), a lower conveying frame (103) and an upper bracket (104); The upper bracket (104) is fixedly connected to one side of the upper surface of the main frame (101), the lower conveying frame (103) is installed at the bottom of the inner side wall of the upper bracket (104), the upper conveying frame (102) is installed on the top of the lower conveying frame (103), the pre-dehydration mechanism (2) is installed inside the upper conveying frame (102), a driving mechanism (3) is installed on one side of the upper surface of the upper bracket (104), a drying conveying mechanism (4) is installed inside the main frame (101), an air drying mechanism (5) is installed on one side of the main frame (101), a granulating mechanism (7) is installed on one side of the pre-dehydration mechanism (2), a pre-cooling conveying mechanism (8) is installed inside the lower conveying frame (103), and a water vapor recovery mechanism (9) is installed on the other side of the upper surface of the main frame (101); The pre-dehydration mechanism (2) is used to squeeze and dehydrate the sludge, and cooperates with the granulation mechanism (7) to granulate the dehydrated sludge; The air drying mechanism (5) is used to inject cold air and hot air into the interior of the lower conveying frame (103) and the main frame (101), respectively, so as to pre-cool the sludge particles by using the cold air in conjunction with the pre-cooling conveying mechanism (8), and to heat and dry the sludge particles after pre-cooling by using the hot air in conjunction with the drying conveying mechanism (4); The water vapor recovery mechanism (9) is used to extract the water vapor generated by heating and drying the sludge to form a spiral airflow, and cooperate with the used cold air in the lower conveying rack (103) to cool and liquefy the water vapor in the spiral airflow.

2. The drying device for sludge treatment according to claim 1, characterized in that: The pre-dehydration mechanism (2) comprises a water filter cylinder (201), a first auger column (202), a conical cylinder (203), a cylindrical frame (204), and a plurality of breathable steel filter plates (205); The water filter cartridge (201) is fixedly connected to one side of the inner wall of the upper conveying frame (102), the cylindrical frame (204) is fixedly connected to the other side of the inner wall of the upper conveying frame (102), the conical cylinder (203) is connected between the water filter cartridge (201) and the cylindrical frame (204), the first auger column (202) is rotatably connected to the inner wall of the water filter cartridge (201), the conical cylinder (203) and the cylindrical frame (204), and a plurality of the breathable steel filter plates (205) are installed on the inner wall of the cylindrical frame (204) near the conical cylinder (203).

3. The drying device for sludge treatment according to claim 2, characterized in that: The granulation mechanism (7) comprises a bearing frame (701), a disc frame (702), a sleeve frame (703), a plurality of scrapers (704), a plurality of extrusion holes (705), a guide frame (706), a pressure column (707) and a spring (708); The carrier (701) is fixedly connected to one end of the cylindrical frame (204) away from the conical cylinder (203), the disc frame (702) is rotatably connected to one side of the carrier (701), one end of the first auger column (202) extends to one side of the upper conveying frame (102) and is fixedly connected to the inner side wall of the disc frame (702), the sleeve frame (703) is sleeved on the outer side wall of the cylindrical frame (204), a plurality of scrapers (704) are fixedly connected between the disc frame (702) and the sleeve frame (703), and a plurality of extrusion holes (705) are opened on the On one side of the outer wall of the cylindrical frame (204), the guide frame (706) is fixedly connected to one side of the supporting frame (701), and one side of the outer wall of the first auger column (202) is rotatably connected to the inner wall of the supporting frame (701) and the guide frame (706). The pressure column (707) is slidably connected between the inner wall of the cylindrical frame (204) and the outer wall of the guide frame (706). One end of the spring (708) is fixedly connected to the inner wall of the pressure column (707), and the other end of the spring (708) is fixedly connected to one side of the guide frame (706).

4. The drying device for sludge treatment according to claim 2, characterized in that: The pre-cooling conveying mechanism (8) comprises a third auger (801), a cooling inner cylinder (802), a material distribution hopper (803), a pre-cooling chamber (804) and a connecting frame (805); The cooling inner cylinder (802) is fixedly connected to one side of the inner wall of the lower conveying frame (103); the pre-cooling chamber (804) is opened between the outer wall of the cooling inner cylinder (802) and the inner wall of the lower conveying frame (103); the third auger (801) is rotatably connected to the lower conveying frame (103) and the inner wall of the cooling inner cylinder (802); the connecting frame (805) is installed at one end of the upper conveying frame (102) and the lower conveying frame (103); and the material distribution hopper (803) is connected between the lower conveying frame (103) and the main frame (101).

5. The drying device for sludge treatment according to claim 4, characterized in that: The driving mechanism (3) comprises a reduction motor (301), a first pulley (302), a second pulley (303), a first transmission belt (304), a third pulley (305), a second transmission belt (306) and a gear (307); The reduction motor (301) is mounted on one side of the upper surface of the upper bracket (104), the first pulley (302) is fixedly connected to the output shaft of the reduction motor (301), the second pulley (303) is rotatably connected to one side of the upper conveying frame (102), one end of the second pulley (303) is fixedly connected to one end of the first auger column (202), and the first transmission belt (304) is sleeved on the first pulley (302) and the second pulley ( The outer wall of the lower conveying frame (103), the third pulley (305) is rotatably connected to one side of the lower conveying frame (103), the second transmission belt (306) is sleeved on the outer walls of the second pulley (303) and the third pulley (305), the outer wall of the gear (307) is meshed with one side of the outer wall of the third pulley (305), and one end of the third auger (801) passes through the inner wall of the lower conveying frame (103) and is fixedly connected to one end of the gear (307).

6. The drying device for sludge treatment according to claim 4, characterized in that: The drying and conveying mechanism (4) comprises an inner support (401), a plurality of conveying belts (402), a plurality of rotating rollers (403), and a plurality of second motors (404); The inner bracket (401) is mounted on the inner side wall of the main frame (101), the plurality of conveyor belts (402) are staggered up and down on the inner side wall of the inner bracket (401), the plurality of rollers (403) are rotatably connected to the inner side wall of the inner bracket (401), the plurality of conveyor belts (402) are respectively wrapped around the outer side walls of two horizontally arranged rollers (403), the plurality of second motors (404) are mounted on one side of the inner bracket (401), and the output shafts of the plurality of second motors (404) are respectively fixedly connected to one end of the plurality of rollers (403).

7. The drying device for sludge treatment according to claim 6, characterized in that: The air drying mechanism (5) includes an air compressor (501), a plurality of air supply pipes (502), a plurality of vortex tubes (503), a plurality of cooling pipes (504), a plurality of heating pipes (505), and a plurality of air distribution pipe racks (506); The air compressor (501) is installed on one side of the main frame (101), one end of each of the air supply pipes (502) is connected to the exhaust port of the air compressor (501), the other end of each of the air supply pipes (502) is connected to the air inlet of each of the vortex tubes (503), one end of each of the cooling pipes (504) is connected to the cold air end of each of the vortex tubes (503), the other end of each of the cooling pipes (504) is connected to the pre-cooling chamber (804), one end of each of the heating pipes (505) is connected to the hot air end of each of the vortex tubes (503), the air distribution pipe racks (506) are installed in the inner bracket (401), and the other end of each of the heating pipes (505) is connected to one side of each of the air distribution pipe racks (506).

8. The drying device for sludge treatment according to claim 1, characterized in that: A feeding mechanism (6) is installed on one side of the main frame (101), and the feeding mechanism (6) includes a side bracket (601), a feeding hopper (602), a feeding pipe (603), a third motor (604), a second auger column (605), and a discharge pipe (606); The side bracket (601) is mounted on one side of the main frame (101), the upper hopper (602) is mounted on one side of the side bracket (601), the conveying pipe (603) is fixedly connected to the inner wall of the side bracket (601), the third motor (604) is mounted on one end of the conveying pipe (603), the second auger column (605) is rotatably connected to the inner wall of the side bracket (601), the output shaft of the third motor (604) is fixedly connected to one end of the second auger column (605), one side of the upper hopper (602) is connected to the bottom of the outer wall of the conveying pipe (603), one end of the discharge pipe (606) is connected to the top of the outer wall of the conveying pipe (603), and the other end of the discharge pipe (606) is connected to the interior of the upper conveying frame (102).

9. The drying device for sludge treatment according to claim 6, characterized in that: The water vapor recovery mechanism (9) comprises a recovery box (901), a conical recovery drum (902), a spiral rack (903), an exhaust filter drum (904), a steam transmission pipe (905), an exhaust fan (906), and a cooling pipe (907); The recovery box (901) is installed on one side of the upper surface of the main frame (101), the conical recovery cylinder (902) is fixedly connected to the middle of the inner wall of the recovery box (901), the spiral frame (903) is fixedly connected to the inner wall of the conical recovery cylinder (902), the exhaust filter cartridge (904) is installed on the middle of the inner wall of the conical recovery cylinder (902), and the exhaust fan (906) is installed on the inner bracket ( 401), one end of the steam delivery pipe (905) is connected to the exhaust port of the exhaust fan (906), the other end of the steam delivery pipe (905) passes through the inner wall of the recovery box (901) and is connected to the top of the outer wall of the conical recovery cylinder (902), one end of the cooling pipe (907) is connected to the bottom of the outer wall of the recovery box (901), and the other end of the cooling pipe (907) is connected to the inside of the pre-cooling chamber (804).

10. The drying device for sludge treatment according to claim 9, characterized in that: A protective cover (911) is installed in the middle of the upper surface of the recovery box (901), an air guide pipe (912) is connected to one side of the top of the outer wall of the recovery box (901), a skid-mounted base frame (913) is installed at the bottom of the main frame (101), a first waste water pipe (914) is connected to one side of the upper conveying frame (102), and a second waste water pipe (915) is connected to the bottom of the outer wall of the conical recovery cylinder (902), and the other end of the second waste water pipe (915) passes through the outer wall of the recovery box (901).

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