A high-efficiency sludge carbonization treatment system

Abstract

The present invention relates to the field of sewage sludge treatment, and in particular to a high-efficiency sewage sludge carbonization treatment system, comprising: an outer cylinder, the outer cylinder is provided with a pyrolysis discharge port, a pyrolysis feed end, and a pyrolysis outlet pipe, and the outer cylinder is provided with a heating part in the pyrolysis chamber; an inner cylinder, a drying chamber is formed inside the inner cylinder, a drying outlet pipe is provided on one side of the inner cylinder, and the inner cylinder is provided with a drying inlet pipe near the drying feed port; an incinerator connected to the pyrolysis outlet pipe; a circulating heat exchange component, including a dust collector and a gas heat exchanger; wherein the drying discharge port is connected to the pyrolysis feed end, and the drying feed port is arranged on the side of the pyrolysis feed end facing the pyrolysis discharge port; and the treatment system also includes a driving member. The present invention simplifies the structure and improves the heat utilization efficiency by adopting the method of set-fitting the inner cylinder and the outer cylinder, and separately controls and manages the drying gas path and the pyrolysis gas path, thereby realizing the separate management of the gas paths of the entire system and effectively solving the existing problems.

Description

Technical Field

[0001] The invention relates to the field of sludge treatment, and in particular to a high-efficiency sludge carbonization treatment system. Background Art

[0002] Sludge pyrolysis and carbonization treatment is a common sludge reduction and harm removal treatment. Before sludge carbonization treatment, the sludge needs to be dehydrated to about 60% by filter pressing (generally required to be below 60%), and then dried by sludge drying equipment such as rotary kiln and drying plate to reduce the moisture content of the sludge to about 20%. The dried sludge is then sent to the carbonization furnace for pyrolysis and carbonization treatment at 400 to 600 degrees.

[0003] In the current production process, sludge drying and carbonization are mostly two independent links. The dried material is transported to the carbonization link through conveyors, augers and other conveying equipment, which results in a large amount of site space being occupied. In addition, the drying and carbonization links need to be heated separately, and the heat loss of decentralized heating is large. The material also loses heat during the transfer link, resulting in low heat utilization efficiency.

[0004] Based on the above problems, the patent with application number 202210302394.0 discloses a sludge drying and carbonization integrated machine, which solves the problem by setting a rotary drying furnace on the upper side of the carbonization furnace, and dries the sludge on the upper side by the heat source wind used for sludge carbonization. This type of processing equipment requires multiple devices to be stacked vertically, which is difficult to operate and has low utilization of waste heat for materials.

[0005] Based on the problems existing in the prior art, the applicant proposed a sludge pre-drying and carbonization integrated treatment device, which adopts a two-layer cylinder structure, with drying carried out in the inner cylinder and pyrolysis carbonization carried out between the outer cylinder and the inner cylinder. In the treatment device proposed by the applicant, gas management in the device is a key factor affecting the carbonization treatment efficiency. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a high-efficiency sludge carbonization treatment system. By adopting the method of combining an inner cylinder and an outer cylinder, the structure is simplified and the heat utilization efficiency is improved. The drying gas path and the pyrolysis gas path are separately controlled and managed, thereby realizing separate management of the gas paths of the entire system, making it convenient to adjust the sludge drying degree and efficiently utilize heat, thereby effectively solving the existing problems.

[0007] In order to solve the above problems, the present invention provides a high-efficiency sludge carbonization treatment system, comprising: an outer cylinder, a pyrolysis chamber is provided inside the outer cylinder, a pyrolysis discharge port is provided at one end of the outer cylinder, and a pyrolysis feed port is formed at the other end, the pyrolysis chamber is provided with a pyrolysis outlet pipe at a position close to the pyrolysis outlet, and the outer cylinder is provided with a heating part in the pyrolysis chamber; an inner cylinder, arranged on the inner side of the outer cylinder, a drying chamber is formed inside the inner cylinder, a drying feed port is formed at one end of the inner cylinder, and a drying discharge port is formed at the other end, a drying outlet pipe is provided on the side of the drying discharge port facing the drying feed port, and a drying inlet pipe is provided on the inner cylinder near the drying feed port; An incinerator is connected to the pyrolysis outlet pipe; a circulating heat exchange component includes a dust collector and a gas heat exchanger, the air inlet of the dust collector is connected to the drying outlet pipe, the air outlet is connected to the gas heat exchanger, and the fresh air outlet of the gas heat exchanger is connected to the drying inlet pipe; wherein the drying outlet is connected to the pyrolysis feed end, and the drying feed end is arranged on the side of the pyrolysis feed end facing the pyrolysis outlet; the processing system also includes a driving member, which is suitable for driving the material inside the inner cylinder to move from the drying feed end toward the drying outlet, and driving the material inside the outer cylinder to move from the pyrolysis feed end toward the pyrolysis outlet.

[0008] Furthermore, the dust collector is configured as a cyclone dust collector.

[0009] Furthermore, the outer cylinder is provided with a pyrolysis air inlet pipe at one end close to the pyrolysis feed end.

[0010] Furthermore, the inner cylinder is configured to be rotatable, and the driving member includes: an outer material stripper plate, which is arranged on the outer side of the inner cylinder; and an inner material stripper plate, which is arranged on the inner side of the inner cylinder.

[0011] Furthermore, the inner cylinder extends out of the outer cylinder at the drying outlet; the inner cylinder is provided with a through hole at the position of the outer cylinder at the pyrolysis feed end, and the through hole forms the drying outlet.

[0012] Furthermore, the drying air outlet pipe extends out of the outer side of the inner cylinder in a direction parallel to the axis of the inner cylinder, and the drying air outlet pipe is also provided with a baffle, which is arranged on the side of the through hole facing the drying feed port, and the lower edge of the baffle forms a feeding edge, and the edge of the baffle forms a blocking edge outside the feeding edge, and the distance between the blocking edge and the inner wall of the inner cylinder is less than or equal to 1 cm, and the distance between the feeding edge and the inner wall of the inner cylinder is greater than or equal to 5 cm.

[0013] Furthermore, the inner material-moving plate is configured as an inner material-moving screw, wherein a material storage gap is formed between the inner material-moving screw and the baffle plate, and / or the height of the inner material-moving screw gradually decreases in a section close to the baffle plate.

[0014] Furthermore, the processing system also includes a feeding auger, and the discharge end of the feeding auger is rotatably mounted on the drying feed port of the inner cylinder.

[0015] Furthermore, a discharge port is provided at the bottom of the inner cylinder, and the carbonization treatment system further comprises a valve plate which is openable and closable and is provided at the discharge port.

[0016] Furthermore, the outer cylinder is provided with a first separation ring plate at a position close to the pyrolysis discharge port, the first separation ring plate is provided with a first feeding port, the driving member and the pyrolysis outlet pipe are arranged at positions where the first separation ring plate is away from the pyrolysis discharge port, and the driving member can enter the side of the first separation ring plate facing the pyrolysis discharge port when pushing the material to the first feeding port; the processing system also includes a door panel body installed on the side of the first separation ring plate facing the pyrolysis discharge port, and the door panel body can open and close the first feeding port.

[0017] The beneficial effect of the present invention is that by adopting the method of fitting the inner cylinder and the outer cylinder together, the structure is simplified and the heat utilization efficiency is improved. The drying gas path and the pyrolysis gas path are separately controlled and managed, thereby realizing separate management of the gas paths of the entire system, making it convenient to adjust the sludge drying degree and efficiently utilize heat, thereby effectively solving the existing problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0020] Figure 2 for Figure 1 The schematic diagram of the structure of the inner cylinder and the outer cylinder of the embodiment shown is a schematic diagram of the structure of the inner cylinder and the outer cylinder after being combined.

[0021] Figure 3 for Figure 2 Schematic diagram of the side sectional structure of the part shown.

[0022] Figure 4 for Figure 2 The shown part is a schematic diagram of the local structure after removing the outer cylinder.

[0023] Figure 5 for Figure 3Schematic diagram of the local cross-sectional structure along the AA direction.

[0024] Figure 6 for Figure 1 A schematic side sectional view of the matching position of the baffle and the inner cylinder in the illustrated embodiment.

[0025] Among them: 1. outer cylinder; 2. pyrolysis discharge port; 3. pyrolysis outlet pipe; 4. inner cylinder; 5. drying discharge port; 6. drying feed port; 7. drying outlet pipe; 8. drying inlet pipe; 9. incinerator; 10. dust collector; 11. gas heat exchanger; 12. pyrolysis inlet pipe; 13. outer material plate; 14. inner material plate; 15. baffle; 16. feeding edge; 17. blocking edge; 18. feeding auger; 19. discharge port; 20. valve plate; 21. first dividing ring plate; 22. first feeding port; 23. second dividing ring plate; 24. second feeding port; 25. lifting plate; 26. material leveling spiral. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0027] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0028] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are only connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0031] In the present invention, if Figure 1-6 As shown, a high-efficiency sludge carbonization treatment system is provided, comprising: an outer cylinder 1, a pyrolysis chamber is provided on the inner side of the outer cylinder 1, a pyrolysis discharge port 2 is provided at one end of the outer cylinder 1, and a pyrolysis feed end is formed at the other end, a pyrolysis outlet pipe 3 is provided at the pyrolysis chamber near the pyrolysis discharge port 2, and the outer cylinder 1 is provided with a heating part in the pyrolysis chamber; an inner cylinder 4, arranged on the inner side of the outer cylinder 1, a drying chamber is formed on the inner side of the inner cylinder 4, a drying feed port 6 is formed at one end of the inner cylinder 4, and a drying discharge port 5 is formed at the other end, a drying outlet pipe 7 is provided on the side of the drying discharge port 5 facing the drying feed port 6, and a drying inlet pipe 8 is provided at the inner cylinder 4 near the drying feed port 6; The furnace 9 is connected to the pyrolysis outlet pipe 3; the circulating heat exchange component includes a dust collector 10 and a gas heat exchanger 11, the air inlet of the dust collector 10 is connected to the drying outlet pipe 7, and the air outlet is connected to the gas heat exchanger 11, and the fresh air outlet of the gas heat exchanger 11 is connected to the drying inlet pipe 8; wherein the drying outlet 5 is connected to the pyrolysis feed end, and the drying feed port 6 is arranged on the side of the pyrolysis feed end toward the pyrolysis outlet 2; the processing system also includes a driving member, which is suitable for driving the material inside the inner cylinder 4 to move from the drying feed port 6 toward the drying outlet 5, and driving the material inside the outer cylinder 1 to move from the pyrolysis feed end toward the pyrolysis outlet 2.

[0032] When the efficient sludge carbonization treatment system of the present invention is used, the sludge material to be dried is fed into the inner side of the inner cylinder 4 from the drying feed port 6 of the inner cylinder 4, and the sludge material is driven by the driving member to move toward the drying discharge port 5. After the material is dried in the inner cylinder 4, it enters the pyrolysis feed end through the drying discharge port 5. The sludge material is driven by the driving member between the outer cylinder 1 and the inner cylinder 4 to move toward the pyrolysis discharge port 2, and is heated and pyrolyzed in the process. The sludge material moved to the pyrolysis discharge port 2 is discharged from the pyrolysis discharge port 2.

[0033] In a specific embodiment of the present invention, the following processing flow can be performed on the gas during operation. The water content t1 in the gas drawn out of the drying outlet pipe 7 can be monitored. According to the monitoring of t1, when t1 exceeds the set value, the gas flow rate of the drying inlet pipe 8 and the outlet pipe can be increased. When t1 is less than the set value, the gas flow rate of the drying inlet pipe 8 and the outlet pipe can be reduced, so as to reduce the heat loss caused by the drying inlet and outlet on the basis of ensuring the drying effect. In this process, the air pressure p1 at the position of the drying outlet pipe 7 and the air pressure p2 between the outer cylinder 1 and the inner cylinder 4 at the position of the drying outlet 5 are monitored. By controlling the exhaust speed of the pyrolysis outlet pipe 3, p2 is made greater than the set threshold of p1, so as to reduce the gas between the inner cylinder 4 from leaking into the outer cylinder 1 and the inner cylinder 4. Through such a setting, the gas generated by the carbonization and pyrolysis of the sludge can be burned and processed by the incinerator 9, and the drying gas generated by the drying can be treated after cooling and harmlessness.

[0034] In this process, the present application introduces the gas heated by the gas heat exchanger 11 into the inner side of the inner cylinder 4 through the drying air inlet pipe, and the gas drawn out of the drying air outlet pipe 7 enters the gas heat exchanger 11 after dust removal by the dust collector 10 to be heat exchanged and cooled. In this way, the inner cylinder 4 and the circulating heat exchange component form a drying gas channel, and its beneficial effect is that the gas heat exchanger 11 is used to heat the gas introduced into the inner cylinder 4, so as to maintain the stability of the drying temperature inside the inner cylinder 4 and improve the drying efficiency. Moreover, by using the drying gas drawn out of the drying air outlet pipe 7 as the heat source of the gas heat exchanger 11, the heat source utilization efficiency of the entire system can be improved, and the discharge temperature of the drying gas can also be reduced. In addition, the present application uses a separate drying air inlet pipe 8 and a drying air outlet pipe 7 as the gas flow pipeline inside the inner cylinder 4, which can easily and independently control the gas flow speed inside the inner cylinder 4, so that the sludge material inside the inner cylinder 4 can be quickly dried and the humidity of the sludge can be quickly reduced. Since the present invention leads the dried gas out through the drying gas outlet pipe 7 and then processes it separately, the problem of excessive water content in the gas between the outer cylinder 1 and the inner cylinder 4 caused by the gas leaking from the inner cylinder 4 to the outer cylinder 1 can be reduced.

[0035] The treatment system of the present invention also has the following technical effects when in use: First, the present invention reduces the space occupied by the outer cylinder 1 and the inner cylinder 4 by arranging them in sets, compared with the separate arrangement of the sludge drying and carbonization equipment in the prior art. Moreover, the present invention also simplifies the conveying equipment for conveying sludge materials from the drying stage to the carbonization stage, reducing the heat loss of the sludge in this stage.

[0036] Secondly, the sludge material dried inside the inner cylinder 4 directly enters between the outer cylinder 1 and the inner cylinder 4 through the drying outlet 5, shortening the movement path of the material from the drying stage to the pyrolysis carbonization stage, reducing the heat loss of the sludge material in this process, and further reducing the heat loss of reheating the sludge material during the pyrolysis carbonization process.

[0037] Regarding the implementation of the present invention, in a preferred embodiment, further specifically, the dust collector 10 is configured as a cyclone dust collector 10 .

[0038] In a preferred embodiment, a further optimized configuration of the present invention is that a pyrolysis air inlet pipe 12 is provided at one end of the outer cylinder 1 close to the pyrolysis feed end.

[0039] As shown in the figure, by providing a pyrolysis air inlet pipe 12 , the pyrolysis air inlet pipe 12 can assist air intake during the pyrolysis process, so as to facilitate adjustment of the air pressure between the outer cylinder 1 and the inner cylinder 4 .

[0040] In the illustrated embodiment, for the structure of the present invention, more specifically, as shown in the figure, the inner cylinder 4 is configured to be rotatable, and the driving member includes: an outer material stripper plate 13, which is arranged on the outer side of the inner cylinder 4; and an inner material stripper plate 14, which is arranged on the inner side of the inner cylinder 4.

[0041] In the illustrated embodiment, the outer material-moving plate 13 is configured as an outer material-moving screw, and the inner material-moving plate 14 is configured as an inner material-moving screw, so that the movement of the dried sludge material and the movement of the pyrolysis carbonized sludge material can be achieved simultaneously through the rotation of the inner cylinder 4.

[0042] In the illustrated embodiment, for the embodiment of the present invention, to be more specific, the inner cylinder 4 extends out of the outer cylinder 1 at the drying outlet 5; the inner cylinder 4 is provided with a through hole at the position of the outer cylinder 1 at the pyrolysis feed end, and the through hole forms the drying outlet 5. As shown in the figure, the inner cylinder 4 directly discharges the material between the outer cylinder 1 and the inner cylinder 4 through the through hole on the inner side of the outer cylinder 1.

[0043] In the illustrated embodiment, the present invention is further optimized in that the drying outlet pipe 7 extends out of the outer side of the inner cylinder 4 in a direction parallel to the axis of the inner cylinder 4, and the drying outlet pipe 7 is also provided with a baffle 15, and the baffle 15 is arranged on the side of the through hole facing the drying feed port 6, and the lower edge of the baffle 15 forms a feed edge 16, and the edge of the baffle 15 forms a blocking edge 17 outside the feed edge 16, and the distance between the blocking edge 17 and the inner wall of the inner cylinder 4 is less than or equal to 1 cm, and the distance between the feed edge 16 and the inner wall of the inner cylinder 4 is greater than or equal to 5 cm.

[0044] As shown in the figure, by setting the baffle 15, when the dried sludge material moves to the position of the baffle 15, the sludge material is constrained by the baffle 15 to pass through the lower side of the feed edge 16, and by controlling the distance between the feed edge 16 and the inner wall of the inner cylinder 4, the gas interaction on both sides of the baffle 15 can be reduced when part of the material passes under the feed edge, so as to reduce the drying gas inside the inner cylinder 4 from entering between the outer cylinder 1 and the inner cylinder 4, and at the same time reduce the amount of pyrolysis gas between the outer cylinder 1 and the inner cylinder 4 discharged from the drying outlet pipe 7.

[0045] In the present invention, as a preferred embodiment, a brush can be provided on the sealing edge 17 so that the sealing edge 17 contacts the inner wall of the inner cylinder 4 to reduce air leakage at the sealing edge 17. By controlling the distance between the sealing edge 17 and the inner wall of the inner cylinder 4, it is ensured that the material can pass through the baffle 15.

[0046] In the illustrated embodiment, with regard to the structural arrangement of the present invention, to be further specific, as shown in the figure, the inner material stripping plate 14 is arranged as an inner material stripping screw, wherein a material storage gap is formed between the inner material stripping screw and the baffle 15. As shown in the figure, there is a material storage gap between the inner material stripping screw and the baffle 15, so that part of the sludge material can be docked between the inner material stripping screw and the baffle 15, so that the material can use the space below the material passing edge 16 to block the space for gas passing, so as to further reduce the gas circulation at the baffle 15 position.

[0047] As for the method of achieving the accumulation of materials at the lower edge of the baffle 15, in an optional setting, it can also be set so that the height of the inner material screw gradually decreases in a section close to the baffle 15. In this way, the ability of the inner material screw to push the sludge material in a section close to the baffle 15 can be reduced, thereby increasing the accumulation degree of the sludge material at this position.

[0048] In the illustrated embodiment, for the structure of the present invention, to be more specific, as shown in the figure, the processing system also includes a feeding auger 18, and the discharge end of the feeding auger 18 is rotatably installed on the drying feed port 6 of the inner cylinder 4.

[0049] As shown in the figure, the sludge material to be dried is supplied into the inner cylinder 4 through the feeding auger 18, so that the sludge material is transported in the conveying auger to reduce air leakage at the drying feed port 6, so as to reduce the oxygen content in the whole system during anaerobic or low-oxygen drying and carbonization.

[0050] In the illustrated embodiment, the feeding auger 18 can not only supply materials to the drying feed port 6, but also configure the shell part of the conveyor auger to be a double-layer shell, and the drying air inlet pipe is connected to the shell of the conveying auger. The drying air inlet pipe ventilates the inside of the inner cylinder through the hollow structure of the double-layer shell of the conveying auger.

[0051] In the illustrated embodiment, for the structure of the present invention, more specifically, as shown in the figure, a pyrolysis outlet 2 is provided at the bottom of the inner cylinder 4, and the carbonization treatment system further includes a valve plate 20 which is openable and closable and is provided at the outlet 19.

[0052] As shown in the figure, by setting the pyrolysis discharge port 2 at the bottom of the inner cylinder 4, when discharging the sludge material, the pyrolysis discharge port 2 can be kept in the state of the sludge material by controlling the opening and closing of the valve plate 20, so as to further reduce the gas leakage at the pyrolysis discharge port 2. In the embodiment shown in the figure, the valve plate 20 drives the pyrolysis discharge port 2 to open and close through an oil cylinder or an electric telescopic rod.

[0053] In order to further optimize the gas leakage management at the position of the pyrolysis outlet 2, in the illustrated embodiment, a further optimized setting is that a first separation ring plate 21 is provided at a position of the outer cylinder 1 close to the pyrolysis outlet, and the first separation ring plate 21 is provided with a first feed port 22, and the driving member and the pyrolysis outlet pipe are arranged at a position where the first separation ring plate 21 is away from the pyrolysis outlet 2, and the driving member can enter the side of the first separation ring plate facing the pyrolysis outlet when pushing the material to the first feed port; the processing system also includes a door panel body installed on the side of the first separation ring plate 21 facing the pyrolysis outlet 2, and the door panel body can open and close the first feed port.

[0054] As shown in the figure, a heating part is arranged at the left section of the outer cylinder 1 (in the illustrated embodiment, a heating shell is arranged on the outside of the outer cylinder 1, and heating is achieved by passing hot air generated by the incinerator between the heating shell and the outer cylinder 1), and a first dividing ring plate 21 is arranged between the outer cylinder 1 and the inner cylinder 4 at the right end of the heating part. The first dividing ring plate 21 is provided with a first feeding port 22. When the inner cylinder 4 rotates, the external feeding screw conveys the sludge material through the first feeding port 22 to the right side of the first dividing ring plate 21, so as to reduce the leakage of the pyrolysis gas at the heating part position on the inner side of the outer cylinder 1 to the right side of the first dividing ring plate 21. An openable and closable door plate body is installed on the right side of the first dividing ring plate 21 to open the first feeding port 22 when the external feeding screw drives the sludge material to rotate to the position of the first feeding port 22, and the door plate body closes the first feeding port 22 when the first feeding port 22 does not transport materials. Specifically, the upper end of the door plate body can be hinged to the upper edge of the first feeding port 22, or as shown in the accompanying drawings, the door plate body is configured as a ring plate installed on the inner cylinder, and the ring plate is provided with a connecting hole corresponding to the first feeding port 22, so that when the external feeding screw pushes the material to the first feeding port 22, the material passes through the connecting hole, and when the external feeding screw drives the material to rotate through the first feeding port, the ring plate blocks the first feeding port.

[0055] In the illustrated embodiment, the outer cylinder 1 is also spaced apart from the right side of the first separating ring plate 21 with a second separating ring plate 23, a second material passing port 24 is provided in the middle of the second separating ring plate 23, a lifting plate 25 is provided between the first separating ring plate 21 and the second separating ring plate 23, the lifting plate 25 extends obliquely to the side of the inner cylinder 4, and the inner cylinder 4 can move the sludge material to the second material passing port 24 when driving the lifting plate 25 to rotate. The outer cylinder 1 is provided with a material-leveling spiral at the right side of the second feed port 24, and the outer surface of the inner cylinder 4 on the right side of the second dividing ring plate 23 is set to a smooth surface, so that the sludge material on the right side of the second dividing ring plate 23 can be more evenly distributed between the inner cylinder 4 and the outer cylinder 1. As shown in the figure, the pyrolysis discharge port 2 is set at the right side of the second dividing ring plate 23, so that the upper side of the pyrolysis discharge port 2 can have a sufficient height of sludge material, so that when the pyrolysis discharge port 2 discharges the sludge material outward, the sludge material on the upper side falls in time, so as to further reduce the air leakage at the pyrolysis discharge port 2. Moreover, by making the sludge material on the right side of the second dividing ring plate 23 have a certain height, the sludge material can release heat to the inner cylinder 4 after contacting the inner cylinder 4 to heat the sludge material inside the inner cylinder 4, and at the same time, the temperature of the discharged sludge material is reduced. In the illustrated embodiment, the second separating ring plate 23 is provided with a material distribution screw 26 on the right side of the second feed port 24 . The material distribution screw 26 is driven to rotate by a motor provided on the outside of the inner cylinder 4 to promote uniform distribution of the sludge material on the right side of the second separating ring plate 23 .

[0056] In the illustrated embodiment, with regard to the structure of the valve plate 20, to be more specific, as shown in the figure, a plurality of pyrolysis outlets 2 are provided at intervals at the bottom of the inner cylinder 4 along the length direction of the inner cylinder 4, and a plurality of valve holes are provided correspondingly on the valve plate 20. When the valve plate 20 moves to a point where the valve hole corresponds to the pyrolysis outlet 2, the pyrolysis outlet 2 is opened for discharge, and when the valve plate 20 moves to a point where the pyrolysis outlet 2 is blocked, the pyrolysis outlet 2 is closed.

[0057] It should be noted that the improvement of the present invention lies in the matching structure and mode between the inner cylinder and the outer cylinder. There is no restriction on the rotation drive mode of the inner cylinder, the feeding mode of the inner cylinder, and the heating mode of the pyrolysis section. The technicians in this field can flexibly select the existing structural form when implementing it. For example, the part of the inner cylinder extending out of the outer cylinder is provided with a gear ring, and the driving motor drives the inner cylinder to rotate by the gear meshing with the gear ring. The end of the inner cylinder can be fed with materials in the form of a feeding screw, and the pyrolysis section can be heated by interlayer hot air heating, electric heating, etc. For the gas heat exchanger 11, the technicians in this field can flexibly select the existing gas heat exchanger 11. The hot gas source inlet of the gas heat exchanger 11 is connected to the drying outlet pipe 7, the hot gas source outlet can be connected to the incinerator 9, and can also be separated and connected to a dedicated waste gas treatment system. The fresh air inlet of the gas heat exchanger 11 is connected to the external air supply source, and the fresh air outlet is connected to the pyrolysis air inlet pipe and the drying air inlet pipe 8. As for the gas source added to the pyrolysis air inlet pipe and the drying air inlet pipe 8 in the heat exchanger, oxygen-free gas is preferably selected so that the sludge can be pyrolyzed and carbonized under oxygen-free or low-oxygen conditions.

[0058] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0059] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An efficient sludge carbonization treatment system, characterized in that: include: An outer cylinder, a pyrolysis chamber is provided inside the outer cylinder, a pyrolysis outlet is provided at one end of the outer cylinder, and a pyrolysis feed end is formed at the other end, a pyrolysis outlet pipe is provided at a position close to the pyrolysis outlet, and a heating part is provided in the pyrolysis chamber of the outer cylinder; An inner cylinder is arranged on the inner side of the outer cylinder, a drying chamber is formed on the inner side of the inner cylinder, a drying feed inlet is formed at one end of the inner cylinder, and a drying discharge port is formed at the other end, a drying air outlet pipe is arranged on the side of the drying discharge port facing the drying feed inlet of the inner cylinder, and a drying air inlet pipe is arranged on the inner cylinder near the drying feed inlet; An incinerator connected to the pyrolysis outlet pipe; A circulating heat exchange component, comprising a dust collector and a gas heat exchanger, wherein the air inlet of the dust collector is connected to the drying air outlet pipe, the air outlet is connected to the gas heat exchanger, and the fresh air outlet of the gas heat exchanger is connected to the drying air inlet pipe; Wherein, the drying outlet is connected to the pyrolysis feed end, and the drying feed end is arranged on a side of the pyrolysis feed end facing the pyrolysis outlet; The processing system also includes a driving member, which is suitable for driving the material inside the inner cylinder to move from the drying feed port toward the drying discharge port, and driving the material inside the outer cylinder to move from the pyrolysis feed end toward the pyrolysis discharge port; The inner cylinder is arranged to be rotatable, and the driving member comprises: An outer stripping plate, arranged on the outer side of the inner cylinder; An inner stripper plate, arranged on the inner side of the inner cylinder; The inner cylinder extends outwardly from the outer cylinder at the drying outlet; The inner cylinder is provided with a through hole at the position of the outer cylinder at the pyrolysis feeding end, and the through hole forms the drying outlet; The drying gas outlet pipe extends out of the outer side of the inner cylinder in a direction parallel to the axis of the inner cylinder, and the drying gas outlet pipe is also provided with a baffle, which is arranged on the side of the through hole facing the drying feed inlet. The lower edge of the baffle forms a feeding edge, and the edge of the baffle forms a blocking edge outside the feeding edge. The distance between the blocking edge and the inner wall of the inner cylinder is less than or equal to 1 cm, and the distance between the feeding edge and the inner wall of the inner cylinder is greater than or equal to 5 cm.

2. The high-efficiency sludge carbonization treatment system according to claim 1 is characterized in that: The dust collector is configured as a cyclone dust collector.

3. The high-efficiency sludge carbonization treatment system according to claim 1 is characterized in that: The outer cylinder is provided with a pyrolysis air inlet pipe at one end close to the pyrolysis feeding end.

4. The high-efficiency sludge carbonization treatment system according to claim 1 is characterized in that: The inner material-diverting plate is configured as an inner material-diverting spiral. A material storage gap is formed between the inner material-moving screw and the baffle plate, and / or the height of the inner material-moving screw gradually decreases in a section close to the baffle plate.

5. The high-efficiency sludge carbonization treatment system according to claim 1 is characterized in that: The processing system further comprises a feeding auger, the discharge end of which is rotatably mounted on the drying feed port of the inner cylinder.

6. The high-efficiency sludge carbonization treatment system according to claim 1 is characterized in that: A discharge port is provided at the bottom of the inner cylinder, and the carbonization treatment system further comprises a valve plate which is openable and closable and is provided at the discharge port.

7. The high-efficiency sludge carbonization treatment system according to claim 6, characterized in that: The outer cylinder is provided with a first separation ring plate at a position close to the pyrolysis discharge port, the first separation ring plate is provided with a first material passing port, the driving member and the pyrolysis gas outlet pipe are arranged at positions of the first separation ring plate away from the pyrolysis discharge port, and the driving member can enter the side of the first separation ring plate facing the pyrolysis discharge port when pushing the material to the first material passing port; The processing system further includes a door plate body installed on the first separation ring plate on a side facing the pyrolysis discharge port, and the door plate body can open and close the first discharge port.

Images