Efficient pyrolysis biochar heat recovery device
By designing an efficient pyrolytic biochar heat recovery device including a container cavity and a heat exchange cavity, the problems of difficulty in heat self-balancing and low thermal energy recovery efficiency in the prior art are solved, and efficient thermal energy recovery and pyrolytic cost reduction are achieved.
Patent Information
- Application Number
- CN202420876516.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-04-25
AI Technical Summary
In the prior art, when dealing with high humidity organic solid waste, it is difficult to achieve heat self-balancing, resulting in high drying costs and the inability to effectively recover the thermal energy of biochar, resulting in low pyrolysis treatment efficiency.
A high-efficiency pyrolysis biochar heat recovery device is designed, including a container cavity inside the recovery drum and a heat exchange cavity outside the recovery drum. High-temperature organic solid waste is pushed into the recovery drum by pushing the material parts, and heat exchange with the flowing fluid through contact with the inner wall of the recovery drum to achieve heat recovery.
It effectively reduces the pyrolysis cost of pyrolysis solid waste, improves the popularization and promotion of pyrolysis technology, and realizes efficient recycling of biochar thermal energy.
Smart Images
Figure CN222864943U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat energy recovery, in particular to a high-efficiency pyrolysis biochar heat recovery device. Background Art
[0002] When treating and disposing of high-humidity organic solid waste (such as municipal sludge), it is necessary to pre-treat the material to dry it. Most of the drying methods used in the prior art are to use flue gas waste heat to dry the material, but this method only uses flue gas waste heat, so it is difficult to achieve heat self-balance when drying high-humidity materials, and additional heat is required. The drying cost is relatively high, so pyrolysis can be used to treat organic solid waste, but there is a certain amount of biochar in the organic solid waste, especially the biochar after pyrolysis and carbonization of agricultural and forestry waste has a high fixed carbon content. If it is not cooled down, it is very easy to spontaneously combust. At the same time, in sludge-type organic solid waste, due to the high ash content in biochar, the ash will be heated to a high temperature of 500°C or above during the pyrolysis process. Most of the prior art uses stacking to naturally cool the pyrolyzed organic solid waste, which is relatively wasteful and cannot recover the heat energy of biochar, thereby failing to achieve the popularization of pyrolysis treatment of high-humidity organic solid waste, so it needs to be improved. Utility Model Content
[0003] The main purpose of the utility model is to provide a high-efficiency pyrolysis biochar heat recovery device, aiming to provide a heat recovery device that is convenient for efficiently recovering the heat energy of biochar after pyrolysis.
[0004] To achieve the above-mentioned purpose, the utility model proposes a high-efficiency pyrolysis biochar heat recovery device, including a recovery cylinder, a material storage chamber is provided on the inner side of the recovery cylinder, a heat exchange chamber for external fluid to flow through is provided on the outer side of the recovery cylinder, the material storage chamber and the heat exchange chamber are spaced apart by the inner wall of the recovery cylinder, a feed port and a discharge port are provided at both ends of the recovery cylinder, the feed port and the discharge port are respectively connected to the material storage chamber, a pushing piece is provided in the material storage chamber, the pushing piece is used to push the high-temperature organic solid waste located in the material storage chamber from the feed port to the discharge port, and in this process, the high-temperature organic solid waste realizes heat exchange with the fluid flowing through the heat exchange chamber by contacting with the inner wall of the recovery cylinder to achieve cooling.
[0005] Specifically, the recovery tube is tilted, the feed port is arranged at one end of the recovery tube tilted downward, the discharge port is arranged at one end of the recovery tube tilted upward, the opening of the feed port is arranged upward, and the opening of the discharge port is arranged downward.
[0006] Specifically, a first bracket and a second bracket are respectively provided at the ends of the recovery tube, the first bracket and the second bracket are arranged in parallel, the length of the first bracket is smaller than the length of the second bracket, and the first bracket and the second bracket respectively support the two ends of the recovery tube so that the angle between the central axis of the recovery tube and the horizontal plane is an acute angle.
[0007] Specifically, the recovery cylinder includes an inner cylinder and an outer cylinder sleeved on the outer side of the inner cylinder, the material containing cavity is formed inside the inner cylinder, the outer cylinder is arranged on the outer wall of the inner cylinder, and the heat exchange cavity is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder.
[0008] Specifically, a water inlet and a water outlet are respectively provided at both ends of the outer cylinder, and both the water inlet and the water outlet are connected to the heat exchange chamber. The external fluid flows into the heat exchange chamber through the water inlet and flows out through the water outlet. The outer side of the inner cylinder is provided with an arc-shaped water baffle located in the heat exchange chamber and used in conjunction with the water inlet. The fluid entering the water inlet is sprayed onto the arc-shaped water baffle.
[0009] Specifically, a plurality of partitions are evenly spaced and arranged in the heat exchange chamber, and the plurality of partitions are arranged along the length direction of the recovery cylinder, and each partition is provided with a notch for facilitating the flow of fluid.
[0010] Specifically, the gaps between two adjacent partitions are staggered with each other, and the gaps between the partitions are the same in size.
[0011] Specifically, the pushing member includes a pushing drive assembly and a spiral blade group. The spiral blade group is arranged in the material holding cavity. The pushing drive assembly is transmission-connected to the spiral blade group and drives the spiral blade group to rotate to push the high-temperature organic solid waste in the material holding cavity.
[0012] Specifically, both ends of the recovery drum are respectively provided with a driving shaft cooperating with the feed port and a driven shaft cooperating with the discharge port, the spiral blade group includes a first spiral blade, a second spiral blade and a third spiral blade connecting the first spiral blade and the second spiral blade, the first spiral blade is spirally wound on the outside of the driving shaft, the second spiral blade is spirally wound on the outside of the driven shaft, the spiral blade group is connected in the material holding chamber through the driving shaft and the driven shaft, the pushing drive assembly is provided on the side of the recovery drum where the driving shaft is provided, and the rotating end of the pushing drive assembly is transmission-connected to the driving shaft.
[0013] Specifically, the pitch of the third helical blade is greater than the pitch of the first helical blade and the pitch of the second helical blade.
[0014] The technical solution of the utility model is to set a material holding chamber on the inner side of the recovery cylinder and then set a heat exchange chamber on the outer side of the recovery cylinder. The heat exchange chamber and the material holding chamber cooperate with each other according to the heat transfer law to realize heat recovery of high-temperature organic solid waste, thereby reducing the pyrolysis cost of pyrolysis solid waste and facilitating the popularization and promotion of pyrolysis technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.
[0016] Figure 2 for Figure 1 Cross-sectional view in the AA direction.
[0017] Figure 3 for Figure 1 An enlarged schematic diagram of point B.
[0018] Figure 4 It is a schematic diagram of the angle orientation when the partition of the utility model is axially arranged.
[0019] The reference numerals include: 10, recovery cylinder; 101, inner cylinder; 102, outer cylinder; 11, feed port; 12, discharge port; 13, material storage chamber; 14, heat exchange chamber; 141, arc-shaped water baffle; 15, first bracket; 16, second bracket; 17, water inlet; 18, water outlet; 19, partition; 191, notch; 20, push drive motor; 21, spiral blade group. DETAILED DESCRIPTION
[0020] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] like Figures 1 to 4As shown, a high-efficiency pyrolysis biochar heat recovery device includes a recovery cylinder 10, a material holding chamber 13 is provided on the inner side of the recovery cylinder 10, a heat exchange chamber 14 for external fluid to flow through is provided on the outer side of the recovery cylinder 10, the material holding chamber 13 and the heat exchange chamber 14 are spaced apart by the inner wall of the recovery cylinder 10, a feed port 11 and a discharge port 12 are provided at both ends of the recovery cylinder 10, the feed port 11 and the discharge port 12 are respectively connected to the material holding chamber 13, a pushing piece is provided in the material holding chamber 13, the pushing piece is used to push the high-temperature organic solid waste located in the material holding chamber 13 from the feed port 11 to the discharge port 12, and in this process, the high-temperature organic solid waste contacts with the inner wall of the recovery cylinder 10 to achieve heat exchange with the fluid flowing through the heat exchange chamber 14 to achieve cooling. When the high-temperature organic solid waste that has completed pyrolysis (pyrolysis biochar discharged from the gas-solid separation chamber of the pyrolysis furnace) is heat recovered, the high-temperature organic solid waste enters the material chamber 13 through the feed port 11, and then moves along the material chamber 13 through the pusher. In the process of the high-temperature organic solid waste moving along the material chamber 13, it will fully contact the inner wall of the material chamber 13 and transfer heat to the heat exchange chamber 14. By pouring liquid into the heat exchange chamber 14, heat absorption is carried out to achieve heat transfer of high-temperature organic solids, thereby achieving heat recovery of high-temperature organic solid waste, thereby reducing the pyrolysis cost of pyrolysis solid waste, and facilitating the popularization and promotion of pyrolysis technology.
[0022] The recovery cylinder 10 is tilted, the feed port 11 is located at one end of the recovery cylinder 10 tilted downward, the discharge port 12 is located at one end of the recovery cylinder 10 tilted upward, the discharge port 12 is located above the feed port 11, the opening of the feed port 11 is located upward, and the opening of the discharge port 12 is located downward. In this embodiment, the recovery barrel 10 is tilted, and the feed port 11 is arranged at the lower end of the recovery barrel 10 and the opening is arranged upward, so that the high-temperature organic solid waste can enter the storage chamber 13 of the recovery barrel 10 through the feed port 11, and the discharge port 12 is arranged at the upper end of the recovery barrel 10 and the opening is arranged downward. When pushing the high-temperature organic solid waste, the tilted recovery barrel 10 will give the high-temperature organic solid a gravity, so that when the high-temperature organic solid waste moves from the feed port 11 to the discharge port 12, relying on the thrust given by the pushing piece and gravity, a force that fits with the inner wall of the storage chamber 13 will be formed, so that the high-temperature organic solid waste is always in close contact with the inner wall of the storage chamber 13 during movement, thereby improving the heat conduction efficiency between the storage chamber 13 and the heat exchange chamber 14, so as to improve the heat recovery efficiency.
[0023] The ends of the recovery tube 10 are provided with a first bracket 15 and a second bracket 16, respectively. The first bracket 15 and the second bracket 16 are arranged in parallel. The length of the first bracket 15 is less than the length of the second bracket 16. The first bracket 15 and the second bracket 16 respectively support the two ends of the recovery tube 10 so that the angle between the central axis of the recovery tube 10 and the horizontal plane is an acute angle. In this embodiment, the first bracket 15 and the second bracket 16 are respectively provided at the two ends of the recovery tube 10, and the recovery tube 10 is supported by the first bracket 15 and the second bracket 16 of different lengths, so that the recovery tube 10 is inclined.
[0024] The recovery cylinder 10 includes an inner cylinder 101 and an outer cylinder 102 sleeved on the outer side of the inner cylinder 101, a material chamber 13 is formed inside the inner cylinder 101, and the outer cylinder 102 is arranged on the outer wall of the inner cylinder 101, and a heat exchange chamber 14 is formed between the outer wall of the inner cylinder 101 and the inner wall of the outer cylinder 102. In this embodiment, the material chamber 13 is formed in the inner cylinder 101, and the heat exchange chamber 14 is formed between the outer wall of the inner cylinder 101 and the inner wall of the outer cylinder 102, so that the material chamber 13 and the heat exchange chamber 14 can perform heat exchange, thereby improving the heat exchange efficiency.
[0025] A water inlet 17 and a water outlet 18 are respectively provided at both ends of the outer cylinder 102, and both the water inlet 17 and the water outlet 18 are connected to the heat exchange chamber 14. The external fluid flows into the heat exchange chamber 14 through the water inlet 17 and flows out through the water outlet 18. The outer side of the inner cylinder 101 is provided with an arc-shaped water baffle 141 located in the heat exchange chamber 14 and used in conjunction with the water inlet 17. The fluid entering the water inlet 17 is sprayed on the arc-shaped water baffle 141. In this embodiment, a water inlet 17 and a water outlet 18 are respectively provided at both ends of the outer cylinder 102, so that a liquid for absorbing heat (for example, water with an initial temperature of 85°C) can be injected into the heat exchange chamber 14, so as to facilitate the wall-to-wall heat exchange between the material chamber 13 and the heat exchange chamber 14, and then flow out of the heat exchange chamber 14 through the water outlet 18, thereby realizing heat transfer, so as to finally realize heat energy recovery. At the same time, an arc-shaped water baffle 141 is provided directly above the water inlet 17, and the arc-shaped water baffle 141 reduces the erosion and abrasion of the inner cylinder 101 by the high-flow circulating hot water, thereby improving the service life of the recovery cylinder 10.
[0026] A plurality of partitions 19 are evenly spaced in the heat exchange chamber 14, and the plurality of partitions 19 are arranged along the length direction of the recovery cylinder 10, and each partition 19 is provided with a notch 191 for facilitating the flow of fluid. In this embodiment, a plurality of partitions 19 are evenly spaced in the heat exchange chamber 14, and notches 191 are provided at the partitions 19, so as to limit the speed of the water flow in the heat exchange chamber 14, so as to achieve the effect of improving the overall heat transfer coefficient.
[0027] The notches 191 between two adjacent partitions 19 are staggered, and the notches 191 between the partitions 19 are of the same size. In this embodiment, the notches 191 between the partitions 19 are arranged at an angle of 120°, and are alternately arranged in the axial direction in the opposite direction. The normal angle of the notches 191 between two adjacent partitions 19 is 180°, so as to achieve the flow rate design of the circulating hot water in the heat exchange chamber 14, and the flow rate is about 2m / s.
[0028] The pusher includes a pusher drive assembly and a spiral blade group 21. The spiral blade group 21 is disposed in the material chamber 13. The pusher drive assembly is in transmission connection with the spiral blade group 21 and drives the spiral blade group 21 to rotate so as to push the high-temperature organic solid waste in the material chamber 13. In this embodiment, the pusher drive assembly drives the spiral blade group 21 to rotate, thereby driving the high-temperature organic solid waste to move in the material chamber 13, thereby realizing that the high-temperature organic solid waste moves from the feed port 11 to the discharge port 12, and is finally discharged from the discharge port 12.
[0029] A driving shaft cooperating with the feed port 11 and a driven shaft cooperating with the discharge port 12 are respectively provided at both ends of the recovery drum 10. The spiral blade group 21 includes a first spiral blade, a second spiral blade and a third spiral blade connecting the first spiral blade and the second spiral blade. The first spiral blade is spirally wound on the outside of the driving shaft, and the second spiral blade is spirally wound on the outside of the driven shaft. The spiral blade group 21 is connected in the material holding chamber 13 through the driving shaft and the driven shaft. The pushing drive assembly is provided on the side of the recovery drum 10 where the driving shaft is provided, and the rotating end of the pushing drive assembly is transmission-connected to the driving shaft; the pitch of the third spiral blade is greater than the pitch of the first spiral blade and the pitch of the second spiral blade. In this embodiment, a driving shaft and a driven shaft are respectively provided at both ends of the material holding chamber 13 of the recovery cylinder 10, and the driving shaft is driven by the push drive assembly, so that the spiral blade group 21 cooperates with the driven shaft to realize the rotation of the spiral blade group 21. In addition, reinforcing steel bars are welded at the central axes of the first spiral blade and the second spiral blade, so that the pitch of the first spiral blade and the second spiral blade is 200mm or greater than 200mm to increase the strength of the spiral blade to prevent high-temperature deformation. At the same time, no reinforcing steel bar is added at the third spiral blade, so that the pitch of the third spiral blade is 400mm or greater than 400mm to reduce the filling coefficient of the high-temperature organic solid waste in the inner cylinder 101, the contact area of the inner wall of the high-temperature organic solid waste is increased, the disturbance and dispersion of the high-temperature organic solid waste are enhanced, and the heat exchange efficiency is improved.
[0030] The recovery drum 10 is provided with a connection hole at one end of the active shaft, and the push drive assembly is a push drive motor 20. A fixing hole corresponding to the connection hole is provided on one side of the output end of the push drive motor 20. The push drive motor 20 is fixedly connected to the recovery drum 10 by passing through the connection hole and the fixing hole in sequence through an external fixing screw. In this embodiment, a connection hole is provided at the end of the recovery drum 10, and a fixing hole is provided on the push drive motor 20, so that the push drive motor 20 can be fixed to the recovery drum 10 through the external fixing screw in conjunction with the connection hole and the fixing hole.
[0031] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. An efficient pyrolysis biochar heat recovery device, characterized in that: The invention comprises a recovery cylinder (10), wherein a material storage chamber (13) is provided on the inner side of the recovery cylinder (10), and a heat exchange chamber (14) for external fluid to flow through is provided on the outer side of the recovery cylinder (10), the material storage chamber (13) and the heat exchange chamber (14) are spaced apart by the inner wall of the recovery cylinder (10), and a feed port (11) and a discharge port (12) are provided at both ends of the recovery cylinder (10), and the feed port (11) and the discharge port (12) are respectively connected to the material storage chamber (13), and a pushing member is provided in the material storage chamber (13), and the pushing member is used to push the high-temperature organic solid waste in the material storage chamber (13) from the feed port (11) to the discharge port (12), and in this process, the high-temperature organic solid waste contacts the inner wall of the recovery cylinder (10) to achieve heat exchange with the fluid flowing through the heat exchange chamber (14) to achieve cooling.
2. The high-efficiency pyrolysis biochar heat recovery device according to claim 1, characterized in that: The recovery tube (10) is arranged at an angle, the feed port (11) is arranged at one end of the recovery tube (10) which is inclined downward, and the discharge port (12) is arranged at one end of the recovery tube (10) which is inclined upward, the opening of the feed port (11) is arranged upward, and the opening of the discharge port (12) is arranged downward.
3. The high-efficiency pyrolysis biochar heat recovery device according to claim 1 is characterized in that: The ends of the recovery tube (10) are respectively provided with a first bracket (15) and a second bracket (16); the first bracket (15) and the second bracket (16) are arranged in parallel; the length of the first bracket (15) is smaller than the length of the second bracket (16); the first bracket (15) and the second bracket (16) respectively support the two ends of the recovery tube (10) so that the angle between the central axis of the recovery tube (10) and the horizontal plane is an acute angle.
4. The high-efficiency pyrolysis biochar heat recovery device according to claim 1, characterized in that: The recovery cylinder (10) comprises an inner cylinder (101) and an outer cylinder (102) sleeved on the outer side of the inner cylinder (101); the material containing chamber (13) is formed inside the inner cylinder (101); the outer cylinder (102) is arranged on the outer wall of the inner cylinder (101); and the heat exchange chamber (14) is formed between the outer wall of the inner cylinder (101) and the inner wall of the outer cylinder (102).
5. The high-efficiency pyrolysis biochar heat recovery device according to claim 4, characterized in that: A water inlet (17) and a water outlet (18) are respectively provided at both ends of the outer cylinder (102); the water inlet (17) and the water outlet (18) are both connected to the heat exchange chamber (14); external fluid flows into the heat exchange chamber (14) through the water inlet (17) and flows out through the water outlet (18); an arc-shaped water baffle (141) located in the heat exchange chamber (14) and used in conjunction with the water inlet (17) is provided on the outer side of the inner cylinder (101); the fluid entering through the water inlet (17) is sprayed onto the arc-shaped water baffle (141).
6. The high-efficiency pyrolysis biochar heat recovery device according to claim 1, characterized in that: A plurality of partitions (19) are evenly spaced and arranged in the heat exchange chamber (14); the plurality of partitions (19) are arranged along the length direction of the recovery cylinder (10); and each partition (19) is provided with a notch (191) for facilitating the flow of fluid.
7. The high-efficiency pyrolysis biochar heat recovery device according to claim 6, characterized in that: The notches (191) between two adjacent partitions (19) are arranged in a staggered manner, and the notches (191) between the partitions (19) are of the same size.
8. The high-efficiency pyrolysis biochar heat recovery device according to claim 1, characterized in that: The pushing member comprises a pushing drive assembly and a spiral blade group (21); the spiral blade group (21) is arranged in the material holding chamber (13); the pushing drive assembly is transmission-connected to the spiral blade group (21) and drives the spiral blade group (21) to rotate so as to push the high-temperature organic solid waste in the material holding chamber (13).
9. The high-efficiency pyrolysis biochar heat recovery device according to claim 8, characterized in that: The two ends of the recovery cylinder (10) are respectively provided with a driving shaft cooperating with the feed port (11) and a driven shaft cooperating with the discharge port (12); the spiral blade group (21) comprises a first spiral blade, a second spiral blade and a third spiral blade connecting the first spiral blade and the second spiral blade; the first spiral blade is spirally wound on the outside of the driving shaft; the second spiral blade is spirally wound on the outside of the driven shaft; the spiral blade group (21) is connected in the material holding chamber (13) via the driving shaft and the driven shaft; the pushing drive assembly is arranged on one side of the recovery cylinder (10) where the driving shaft is arranged; and the rotating end of the pushing drive assembly is transmission-connected to the driving shaft.
10. The high-efficiency pyrolysis biochar heat recovery device according to claim 9, characterized in that: The pitch of the third helical blade is greater than the pitch of the first helical blade and the pitch of the second helical blade.