Hydrothermal cracking organic fertilizer's screen cylinder drying equipment
By combining a screen drying device with a stirring paddle and a multi-air-inlet chamber design, the problems of material blockage and uneven drying after hydrothermal pyrolysis are solved, achieving efficient hot air drying and material uniformity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING HESHI TECH CO LTD
- Filing Date
- 2022-12-08
- Publication Date
- 2026-06-09
AI Technical Summary
Traditional drying equipment is prone to problems such as clumping, adhesion, uneven drying, and low heat utilization when processing viscous and porous media materials after hydrothermal pyrolysis.
The equipment uses a sieve cylinder drying device, combined with a stirring paddle and multiple air inlet chambers. It utilizes hot air drying and the stirring paddle to turn the material, avoiding clogging of the air vents and improving heat utilization and drying uniformity.
It effectively reduces the moisture content of the discharged solids, improves heat utilization, achieves uniform drying of materials, and avoids material blockage and clumping.
Smart Images
Figure CN115808064B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of environmental protection equipment, and in particular to a sieve drying device for hydrothermal pyrolysis organic fertilizer. Background Technology
[0002] The products obtained from hydrothermal pyrolysis have a water content of approximately 78-85%. Due to their high content of fibrous and colloidal substances, the hydrothermal pyrolysis products are highly viscous, contain a large amount of fine-diameter particles, and have a high water content in the solid material after solid-liquid separation. Furthermore, because the material forms a porous medium after hydrolysis and pyrolysis, traditional material drying equipment often encounters problems such as agglomeration and adhesion to the drying wall when drying this highly viscous porous medium. This leads to discontinuous material flow, uneven drying, and reduced heat utilization of the drying medium, among other issues. These problems urgently need to be addressed. Summary of the Invention
[0003] To address the problems existing in the background art, the present invention provides a screen drying device for hydrothermal pyrolysis organic fertilizer, comprising a screen drying device, a shell, a screen cylinder, a first driving component, and a stirring paddle; the screen cylinder body is provided with vent holes, the screen cylinder is disposed inside the shell, the stirring paddle is disposed inside the screen cylinder and is driven to rotate by the first driving component, the stirring paddle conveys the material inside the screen cylinder from the feed side to the discharge side; the space between the shell and the screen cylinder is divided into an air inlet chamber and an air outlet chamber by a partition; the air inlet chamber is connected to an external heat medium, and the shell corresponding to the air outlet chamber is provided with an air outlet.
[0004] In the sieve drying device for hydrothermal pyrolysis organic fertilizer of the present invention, the air inlet chamber is located at the bottom of the shell, and the air outlet is located in the upper middle part of the shell.
[0005] In the sieve drying equipment for hydrothermal pyrolysis organic fertilizer of the present invention, the air inlet chamber is divided into multiple air inlet chambers along the feed side to the discharge side; each air inlet chamber is provided with an air inlet.
[0006] In the sieve cylinder drying device for hydrothermal pyrolysis organic fertilizer of the present invention, the stirring paddle includes a rotating shaft and a spiral blade; the spiral blade is wound around the rotating shaft; the end of the rotating shaft protrudes from the housing and is driven to rotate by the first driving component.
[0007] In the sieve drying device for hydrothermal pyrolysis organic fertilizer of the present invention, the spiral blades are discontinuous blades, and the missing part of the spiral blades accounts for 1 / 3 to 1 / 2 of the area of the spiral blades around the rotating shaft.
[0008] In the sieve drying device for hydrothermal pyrolysis organic fertilizer of the present invention, the angle between the blade of the spiral blade and the axis of rotation is C, 65°≤C≤78°.
[0009] In the sieve drying device for hydrothermal pyrolysis organic fertilizer of the present invention, the pitch of the spiral blade is 0.5-12 times the height M of the spiral blade.
[0010] In the sieve cylinder drying equipment for hydrothermal pyrolysis organic fertilizer of the present invention, the sieve cylinder drying equipment for hydrothermal pyrolysis organic fertilizer further includes a feed pipe and a discharge pipe; one end of the feed pipe is the feed side and is located outside the shell, and the other end is the discharge side and is located inside the sieve cylinder; one end of the discharge pipe is the feed side and is located inside the sieve cylinder, and the other end is the discharge side and is located outside the shell.
[0011] In the sieve cylinder drying device for hydrothermal pyrolysis organic fertilizer of the present invention, the sieve cylinder drying device for hydrothermal pyrolysis organic fertilizer further includes a pre-drying device, which is set before the first drying device, and the material processed by the pre-drying device is conveyed to the first drying device for processing.
[0012] In the sieve drying device for hydrothermal pyrolysis organic fertilizer of the present invention, the pre-drying device includes a shell, a first sieve cylinder, and a first screw propeller; the first sieve cylinder is fixed inside the shell and is a cylinder with openings at both ends, one end with a larger opening and the other end with a smaller opening, the larger opening being the feed inlet and the other end being the discharge outlet; the first screw blade of the first screw propeller is adapted to the shape of the first sieve cylinder and is used to convey the material of the first sieve cylinder from the feed inlet to the discharge outlet.
[0013] In the sieve drying device for hydrothermal pyrolysis organic fertilizer of the present invention, the pre-drying device further includes a second sieve cylinder, a second driving device, and a second spiral blade; the second sieve cylinder is rotatably disposed on the outer shell and sleeved on the outside of the first sieve cylinder; the second driving device is used to drive the second sieve cylinder to rotate; the second spiral blade is a shaftless spiral blade and is fixed on the inner wall of the second sieve cylinder.
[0014] The beneficial effects of the present invention are as follows: The sieve drying equipment for hydrothermal pyrolysis organic fertilizer of the present invention is based on hot air being blown into the air inlet chamber to heat and dry the material inside the sieve cylinder. This not only avoids the material clogging the air vents of the sieve cylinder, but also, with the rotation of the stirring paddle, effectively removes moisture from the hydrothermal pyrolysis products, reducing the water content of the solids in the discharge. Furthermore, the drying of lumpy materials by hot air, combined with the stirring paddle's agitation, breaks up the lumps, thereby achieving uniform drying. Compared with the single hot air drying method, this improves the heat utilization rate. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of the sieve cylinder drying equipment for hydrothermal pyrolysis organic fertilizer of the present invention;
[0016] Figure 2The present invention relates to a sieve cylinder drying device for hydrothermal pyrolysis organic fertilizer. Figure 1 Cross-sectional view;
[0017] Figure 3 This is a schematic diagram of the structure of the stirring paddle in the sieve cylinder drying device for hydrothermal pyrolysis organic fertilizer of the present invention.
[0018] Figure 4 This is a schematic diagram of the pre-drying equipment of the sieve cylinder drying device for hydrothermal pyrolysis organic fertilizer of the present invention.
[0019] Figure 5 This is a cross-sectional view of the stirring paddle of the sieve cylinder drying device for hydrothermal pyrolysis organic fertilizer of the present invention.
[0020] Figure 6 This is a cross-sectional view of the first spiral blade of the sieve cylinder drying device for hydrothermal pyrolysis organic fertilizer of the present invention;
[0021] Figure 7 This is a schematic diagram of the structure of the sieve cylinder drying equipment for hydrothermal pyrolysis organic fertilizer of the present invention, which includes a pre-drying device.
[0022] Figure 1. Screen cylinder drying equipment; 11. Shell; 12. Screen cylinder; 121. Vent hole; 13. First drive assembly; 15. Agitator; 151. Rotating shaft; 152. Spiral blade; 16. Baffle plate; 17. Air inlet chamber; 171. Air inlet chamber; 172. Air inlet; 18. Air outlet chamber; 19. Air outlet; 108. Feed pipe; 109. Discharge pipe; 8. Pre-drying equipment; 81. Shell; 82. First screen cylinder; 821. Feed inlet; 822. Discharge outlet; 83. First spiral propeller; 831. First spiral blade; 832. First drive device; 84. First feed pipe; 85. First discharge pipe; 86. Second screen cylinder; 87. Second drive device; 88. Second spiral blade; 89. Collection trough. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings of this application are intended to cover non-exclusive inclusion.
[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0026] The following detailed description of a sieve drying device for hydrothermal pyrolysis organic fertilizer according to the present invention is based on the accompanying drawings.
[0027] like Figure 1 and 2 As shown, a sieve cylinder drying device for hydrothermal pyrolysis organic fertilizer includes a shell 11, a sieve cylinder 12, a first drive assembly 13, and a stirring paddle 15; the sieve cylinder 12 is provided with ventilation holes 121. Specifically, the diameter of the ventilation holes 121 is selected according to the specific material, such as 1*1mm or 1-1.5mm; the opening rate is 20-30%, and the sieve cylinder 12 can be made of wire mesh or steel plate with openings. The ventilation holes 121 are evenly distributed on the side wall of the sieve cylinder 12. The sieve cylinder 12 is fixedly installed inside the shell 11, and the stirring paddle 15 is installed inside the sieve cylinder 12 and is driven to rotate by the first drive assembly 13 (such as motor drive); preferably, the number of first drive assemblies 13 is 2.
[0028] The stirring paddle 15 transports the material in the screen cylinder 12 from the feed side to the discharge side; the space between the shell 11 and the screen cylinder 12 is divided into an air inlet chamber 17 and an air outlet chamber 18 by a partition 16; the air inlet chamber 17 is connected to the heating equipment, and the shell 11 corresponding to the air outlet chamber 18 is provided with an air outlet 19; hot air enters from the air inlet chamber 17, passes through the screen cylinder 12, and flows into the air outlet chamber 18 to dry the screen cylinder 12 with hot air, and the hot air carrying moisture is discharged through the air outlet 19; based on the setting of the air inlet chamber 17, air can be blown onto the screen cylinder 12 corresponding to the air inlet chamber 17 to discharge fine particles in time (the small particles are blown out through the vent 121), and the vent 121 on the screen cylinder 12 is prevented from being blocked.
[0029] For example, the axes of the agitator 15 and the screen cylinder 12 are arranged horizontally; if the screen cylinder 12 is horizontal, the material is fed from one side to the other side, and the material is transported from the feeding side to the discharging side by the action of the agitator 15. At this time, the air inlet chamber 17 is located at the bottom of the housing 11, and the air outlet 19 is located in the upper middle part of the housing 11, such as the top of the discharging side; so that the hot air introduced can fully dry the material in the screen cylinder.
[0030] The hydrothermal pyrolysis organic fertilizer sieve drying equipment of this invention uses hot air blown into the air inlet chamber to heat and dry the material inside the sieve cylinder. This not only prevents the material from clogging the air vents of the sieve cylinder, but also, with the rotation of the stirring paddle, effectively removes moisture from the hydrothermal pyrolysis products, reducing the moisture content of the solids in the output. It can reduce the moisture content of the solid material to below 30% (compared to 60-65% moisture content after conventional cylindrical extrusion dehydration of the same material). Furthermore, by using hot air to dry lumps of material, and with the stirring paddle breaking up the lumps, the material is dried evenly. Compared to a single hot air drying method, this improves heat utilization efficiency.
[0031] Preferably, the air inlet chamber 17 is divided into multiple air inlet chambers 171 along the feed side to the discharge side; each air inlet chamber 171 is provided with an air inlet 172, and a control valve can be installed in each air inlet 172 to adjust the air volume entering each air inlet chamber 171 (furthermore, hot air of different temperatures can be introduced) to control the degree of dryness of the material in the screen cylinder 12, avoiding over-drying (such as a moisture content below 40%, as a moisture content below 40% is not conducive to subsequent processing and molding); and based on the setting of multiple air inlets 172, the material drying can be more uniform, and as the material is propelled by the stirring paddle 15, it gradually dries, which can save energy. For example, the air inlets 172 are located on the side of the air inlet chamber 171.
[0032] In some embodiments, such as Figure 1 and 3As shown, the stirring paddle 15 includes a rotating shaft 151 and a spiral blade 152. The spiral blade 152 (specifically, the spiral blade 152 is a ribbon spiral blade; the angle C between the blade and the axis of rotation is 65-78°, within which the rotation speed range (2-6 rpm) is matched, enabling effective tumbling and horizontal conveying of the material and matching the drying time to ensure effective control of the degree of drying) is wound around the rotating shaft 151. The end of the rotating shaft 151 protrudes from the housing 11 and is driven to rotate by the first drive assembly 13. Specifically, it can be selected as a motor with a reducer, which can be referred to in existing designs and will not be elaborated here. Based on the spiral blade 152 pushing the material in the screen cylinder 12 and dividing the screen cylinder 12 into several small areas (i.e., the space between one spiral pitch), when combined with the scheme of setting multiple air inlets 171, the hot air flowing into each air inlet 171 is sent into the small areas respectively, and the influence between the small areas is small, thereby achieving control of the drying effect; so that the final dried moisture content is controlled within ±1% of the required moisture content.
[0033] Preferred, such as Figure 3 As shown, the spiral blade 152 is a discontinuous blade, and the missing part of the spiral blade 152 accounts for 1 / 3 to 1 / 2 of the area of the spiral blade 152 around the rotating shaft 151. Based on the discontinuity of the blade, the material pushing speed is reduced, while ensuring the mixing effect. Combined with the introduction of hot air, the drying effect is further improved, and the utilization rate of hot air heat is increased.
[0034] Preferably, the distance K between the outer edge of the spiral blade 152 and the inner wall of the screen cylinder 12 is 100-300mm. For the material processed by this invention, if the distance is smaller than this size, the material is easily squeezed between the blade and the outer cylinder, causing the spiral blade 152 to jam and fail to convey normally; if the distance is larger than this size, a material dead zone is likely to occur, that is, this part of the material does not move, which is not conducive to material turning and water separation.
[0035] Further preferred, such as Figure 5 As shown, the pitch of the spiral blade 152 is set to 0.5-1.2 times the height M of the spiral blade 152. If the pitch is less than this height, there is no tumbling effect; if the pitch is greater than this height, the material conveying speed is too fast, the residence time is too short, and the drying effect is affected.
[0036] In some embodiments, such as Figure 1 As shown, it also includes a feed pipe 108 and a discharge pipe 109; one end of the feed pipe 18 is the feed side and is located outside the shell 11, and the other end is the discharge side and is located inside the screen cylinder 12; one end of the discharge pipe 19 is the feed side and is located inside the screen cylinder 12, and the other end is the discharge side and is located outside the shell 11.
[0037] In some embodiments, such as Figure 4 and7 As shown, to broaden the application range of the hydrothermal pyrolysis organic fertilizer screen drying equipment of the present invention (e.g., to process materials with a moisture content of 72-85%, such as the liquid-solid mixture obtained after hydrothermal pyrolysis of manure and straw, whose product is in a colloidal state and difficult to remove moisture using conventional solid-liquid separation equipment), the hydrothermal pyrolysis organic fertilizer screen drying equipment also includes a pre-drying device 8. The pre-drying device 8 is located before the screen drying equipment 1, and the material processed by the pre-drying device 8 is conveyed to the screen drying equipment 1 for further processing. Based on the pre-drying device 8, the applicability of the device is improved, and the processing load of the screen drying equipment 1 is reduced.
[0038] Specifically, the pre-drying equipment 8 includes a shell 81, a first screen cylinder 82 (different screen sizes can be selected as needed, preferably with a screen hole diameter of 3-6mm, where the material passes through the 3-6mm hole under pressure; if the size is too small, the material cannot pass through smoothly and will cause blockage; if the size is too large, a pressure difference cannot be formed, resulting in ineffective dehydration), and a first screw propeller 83; the first screen cylinder 82 is fixed inside the shell 81 and is a cylinder with openings at both ends, one end being larger and the other smaller, the larger opening being the feed inlet 821 and the other end being the discharge outlet 822; the first screw blade 831 of the first screw propeller 83 (such as a belt-type screw blade with a shaft) is adapted to the shape of the first screen cylinder 82 and is used to push the first screen cylinder 82... Material is fed from inlet 821 to outlet 822 (the first screw propeller 83 also includes a first drive device 832 (such as a motor driving a reducer, the reducer driving the first screw blade 831 to rotate), the first drive device is used to drive the first screw blade 831 to rotate). A liquid outlet is provided at the bottom of the outer shell 81, and multiple liquid collection chambers can also be provided to collect the discharged liquid. Based on the fact that one end of the first screen cylinder has a large opening and the other end has a small opening, that is, the first screw propeller 83 (rotation speed is 3-12 rpm, if the speed is too fast, the material residence time is too short, and the dehydration effect is reduced, if the speed is too slow, the processing capacity is reduced) needs to squeeze and dry the material when outputting it from outlet 822, so as to improve the drying effect of the material.
[0039] In some embodiments, such as Figure 4As shown, the first screen cylinder 82 has a truncated cone structure with a apex angle D of 30-50°. Based on the cone shape, the first screen cylinder 82, combined with the conical spiral blades 831, continuously compresses and dehydrates the material inside the cylinder (compared to a cylindrical cylinder, the conical cylinder exerts greater compressive force on the material, which helps remove moisture). As water is squeezed out, the material volume decreases, and as the material is conveyed forward, the volume of the first screen cylinder 82 also decreases, thus ensuring continuous compression of the material and guaranteeing the dehydration and drying effect (conventional cylindrical screen cylinders typically use increased compressive force during compression). (Selecting a higher-power motor) means that when processing similar colloidal materials, the water cannot be separated; instead, the colloidal particles are broken into smaller particles. If the solid and liquid are not separated, they may flow directly out of the sieve holes due to their smaller size, failing to achieve solid-liquid separation. The apex angle D is selected within the range of 30-50°. Below 30°, it becomes difficult to squeeze and push the material, reducing the material throughput and easily causing damage to the first sieve cylinder or burnout of the motor of the first screw propeller 83. Above 50°, the improvement in drying effect is not significant compared to a cylindrical cylinder. Preferably, the rotation speed of the first screw propeller 83 and the apex angle D are used in combination at 30-50°, ensuring both dehydration effect and throughput while also guaranteeing the equipment's lifespan (such as the shaft h and motor).
[0040] Preferably, the minimum vertical distance between the first spiral blade 831 and the first screen cylinder 82 is H, where H is 13-33 mm. Materials rich in colloids are mostly smaller than 10 mm in size; this range ensures material passage and dewatering under significant friction. Sizes smaller than this will cause material to become stuck in the interlayer; sizes larger than this will severely affect the dewatering effect.
[0041] In some embodiments, such as Figure 4 and 6 As shown, the angle between the blade of the first spiral blade 831 and the axis of rotation is A, 30°≤A≤60°. Within this range, the residence time of the material in the first screen cylinder is guaranteed, which can improve the dewatering effect. Below 30°, the material residence time is too short, resulting in insufficient dewatering; above 60°, it causes difficulties in discharge and increases the motor load. Preferably, when used in conjunction with the apex angle D of the first screen cylinder, it can reduce the moisture content from 72-85% to 45-55%, while the moisture content of the material after conventional cylindrical extrusion dewatering for the same material is 60-65%. The screw pitch can be selected as 0.5-1.0 times the blade height to ensure throughput and dewatering effect.
[0042] In some embodiments, such as Figure 4As shown, the pre-drying equipment 8 also includes a first feed pipe 84. One end of the first feed pipe 84 is located outside the outer shell 81 and is the feed side, while the other end is connected to the first screen cylinder 82 and is the discharge side. Preferably, the discharge side of the first feed pipe 84 is fixedly connected to the feed inlet 821.
[0043] In some embodiments, such as Figure 4 As shown, the pre-drying equipment 8 also includes a first discharge pipe 85; one end of the first discharge pipe 85 is connected to the discharge port 822, and the other end is located outside the outer shell 81 as the discharge side. The first discharge pipe 85 is fixedly connected to the discharge port 822.
[0044] In some embodiments, such as Figure 4 As shown, the pre-drying equipment 8 also includes a second screen cylinder 86 (with a screen hole diameter of 1-3 mm, and the material size after the first screen cylinder 82 is 0.1-1.0 mm; selecting screen holes within this range can create an effective pressure difference, neither clogging the screen holes nor hindering effective dewatering), a second drive device 87, and a second spiral blade 88; the second screen cylinder 86 is rotatably mounted on the outer shell 81 (rotating in the opposite direction to the first spiral propeller 83 to effectively increase friction and improve dewatering efficiency); specifically, its end is sealed to the outer shell and sleeved on the outside of the first screen cylinder 82; the second drive device 87 is used to drive the second screen cylinder 86 to rotate; the second spiral blade 88 is a shaftless spiral blade, such as a ribbon spiral blade; and is fixed to the inner wall of the second screen cylinder 86; based on the first screen cylinder and The second screen cylinder, with its inverted and outverted rotation and differential speed, not only solves the dehydration problem of highly viscous colloids and large molecular clusters, but also, in conjunction with the larger apertures of the first and second screen cylinders, increases friction and agitation on the material, solving the problem of water adsorbing onto fibrous substances and colloids and making them difficult to separate. Furthermore, the second screen cylinder 86 performs secondary processing on the material screened out by the first screen cylinder 82, which can improve the yield of solid materials (generally, the feed moisture content is about 75%, the moisture content of the material screened out by the first screen cylinder 82 (the material entering the second screen cylinder) is 60-62%, and the moisture content of the material exiting the second screen cylinder is about 55%). Preferably, the speed of the second rotating cylinder is 1.0-2.0 times that of the first screw propeller 83 to achieve effective dehydration.
[0045] Preferably, the angle between the blade of the second spiral blade 88 and the axis of rotation is B, 60°≤B≤85°. Within this range, when used in conjunction with the first screen cylinder having a conical structure, the moisture content in the material can be reduced to 60-65%. If the angle is greater than 85°, the material is difficult to advance, resulting in an increase in the load on the second drive device 87 and an increase in energy consumption, but the increase in dewatering efficiency is not significant. If the angle is less than 60°, the material stays in the cylinder for too short a time, and the dewatering effect is reduced. In particular, when used in conjunction with the first spiral blade 831 with an angle of 30°≤A≤60° between the blade and the axis of rotation and the apex angle D of the first screen cylinder of 30-50°, it can achieve the effect of improving the dehydration and drying effect while ensuring the throughput and the yield of solid materials; and when B is 65° and D is 45°, the best dehydration effect can be obtained, and the moisture content of the material discharged from the second screen cylinder 86 can reach 50-52%; specifically, the pitch of the first spiral blade 831 is M=(1.0-1.2)Z, M1=(1.0-1.2)Z1; and so on.
[0046] In some embodiments, such as Figure 4 As shown, the first screen cylinder 82 has a conical structure. The minimum vertical distance between the outer edge of the second spiral blade 88 and the outer wall of the first screen cylinder 82 is L (specifically, L is 10-30mm. Materials rich in colloids are mostly smaller than 10mm in size; this range ensures material passage and dewatering under significant friction. A size smaller than this will cause material to get stuck in the interlayer; a size larger than this will severely affect the dewatering effect). L gradually increases from the discharge port 822 side to the inlet port 821 side. The gap between the outer edge of the second spiral blade 88 and the outer wall of the first screen cylinder 82 facilitates the normal rotation of the second screen cylinder 86 and prevents jamming. The maximum value of L is L1, and the minimum value is L2, where L1 = 1.5-3L2.
[0047] In some embodiments, such as Figure 4 As shown, the second screen cylinder 86 is a cylinder, and the second spiral blade 88, the second screen cylinder 86, the first screen cylinder 82 and the first spiral blade 831 are coaxially arranged. The part between the second screen cylinder 86 and the first screen cylinder 82 located on the side of the feed inlet 821 is an annular outlet. The corresponding pre-drying equipment 8 also includes a collection trough 89. The collection trough 89 is an annular groove adapted to the annular outlet and is fixed to the outer shell 81 for collecting the material output from the annular outlet, and a second discharge port 891 is opened at the bottom.
Claims
1. A sieve cylinder drying device for hydrothermal pyrolysis organic fertilizer, characterized in that, Includes a sieve cylinder drying device (1) and a pre-drying device (8); The sieve cylinder drying device (1) includes a shell (11), a sieve cylinder (12), a first drive assembly (13), and a stirring paddle (15). The screen cylinder (12) is provided with a vent hole (121) in its body. The screen cylinder (12) is located inside the housing (11). The stirring paddle (15) is located inside the screen cylinder (12) and is driven to rotate by the first driving assembly (13). The stirring paddle (15) transports the material inside the screen cylinder (12) from the feeding side to the discharging side. The space between the shell (11) and the screen cylinder (12) is divided into an air inlet chamber (17) and an air outlet chamber (18) by a partition (16); the air inlet chamber (17) is connected to the external heat medium, and the air outlet chamber (18) is provided with an air outlet (19) on the shell (11). The air inlet chamber (17) is located at the bottom of the housing (11), and the air outlet (19) is located in the upper middle part of the housing (11). The air inlet chamber (17) is divided into multiple air inlet chambers (171) along the feed side to the discharge side; each air inlet chamber (171) is provided with an air inlet (172). The pre-drying device (8) is located before the screen cylinder drying device (1), and the material processed by the pre-drying device (8) is transported to the screen cylinder drying device (1) for processing. It includes a shell (81), a first screen cylinder (82), a first screw propeller (83), a second screen cylinder (86), a second drive device (87), and a second screw blade (88). The first screen cylinder (82) is fixed inside the outer shell (81) and is a cylinder with openings at both ends. One end has a larger opening and the other end has a smaller opening. The larger opening is the feed inlet (821), and the other side is the discharge outlet (822). The surface of the first sieve cylinder (82) is uniformly distributed with sieve holes, the diameter of which is 3-6 mm; The first spiral blade (831) of the first spiral propeller (83) is adapted to the shape of the first screen cylinder (82) to deliver the material in the first screen cylinder (82) from the feed port (821) to the discharge port (822). The second screen cylinder (86) is rotatably disposed on the outer shell (81) in the opposite direction of rotation to the first screw propeller (83), and is sleeved on the outside of the first screen cylinder (82); The second sieve cylinder (86) has uniformly distributed sieve holes on its surface, and the diameter of the sieve holes is 1-3 mm; The second drive device (87) is used to drive the second screen cylinder (86) to rotate; The second helical blade (88) is a shaftless helical blade and is fixed to the inner wall of the second sieve cylinder (86); The angle between the blade of the second helical blade (88) and the axis of rotation is B, 60°≤B≤85°; The second screen cylinder (86) is located on one side of the feed inlet (821) and has a second discharge outlet (891). The discharge outlet (822) of the first screen cylinder (82) and the second discharge outlet (891) of the second screen cylinder (86) are both connected to the feed side of the screen cylinder drying equipment (1) through pipes.
2. The sieve cylinder drying equipment for hydrothermal pyrolysis organic fertilizer according to claim 1, characterized in that, The stirring paddle (15) includes a rotating shaft (151) and a spiral blade (152). The helical blade (152) is wound around the rotating shaft (151); The end of the shaft (151) protrudes from the housing (11) and is driven to rotate by the first drive assembly (13).
3. The sieve cylinder drying equipment for hydrothermal pyrolysis organic fertilizer according to claim 2, characterized in that, The helical blade (152) is a discontinuous blade, and the missing part of the helical blade (152) accounts for 1 / 3 to 1 / 2 of the area of the helical blade (152) around the rotating shaft (151).
4. The sieve cylinder drying equipment for hydrothermal pyrolysis organic fertilizer according to claim 2, characterized in that, The angle between the blade of the helical blade (152) and the axis of rotation is C, where 65°≤C≤78°.
5. The sieve cylinder drying equipment for hydrothermal pyrolysis organic fertilizer according to claim 2, characterized in that, The pitch of the helical blade (152) is 0.5-12 times the height M of the helical blade (152).
6. The sieve cylinder drying equipment for hydrothermal pyrolysis organic fertilizer according to claim 1, characterized in that, The screen drying equipment for the hydrothermal pyrolysis organic fertilizer also includes a feed pipe (108) and a discharge pipe (109). One end of the feed pipe (108) is the feed side and is located outside the shell (11), and the other end is the discharge side and is located inside the screen cylinder (12); One end of the discharge pipe (109) is the feed side and is located inside the screen cylinder (12), and the other end is the discharge side and is located outside the shell (11).