Continuous Sludge Carbonization Device Based on Porous Electrode Vacuum Pyrolysis

Abstract

This invention provides a continuous sludge carbonization device based on porous electrode vacuum pyrolysis, comprising a reactor with a sludge conveying channel on the bottom surface of the inner wall of the reactor, and an extension pipe connected to the sludge conveying channel fixedly installed on the outer wall of the reactor. This invention achieves continuous sludge conveying within the sludge conveying channel, receiving tank, and extension pipe through a motor-driven rotating shaft and three-section spiral blades. Combined with the sludge-breaking effect of baffles and through-holes, the contact area between the sludge and the pyrolysis components is increased, improving pyrolysis efficiency. Simultaneously, a stirring component thoroughly stirs the sludge during the preheating stage to prevent clumping and ensure uniform heating. This works closely with the subsequent continuous conveying process to achieve continuous sludge treatment from feed to discharge, improving sludge carbonization efficiency. The vacuum environment (-90 kPa) lowers the boiling point of organic matter, and the 200-300°C Joule heat generated by the energized double-layer honeycomb porous electrodes achieves low-temperature sludge pyrolysis.

Description

Technical Field

[0001] This invention belongs to the technical field of sludge treatment equipment, and more specifically, it relates to a continuous carbonization device for sludge based on porous electrode vacuum pyrolysis. Background Technology

[0002] With the acceleration of urbanization and the increase in sewage treatment volume, sludge production is rising rapidly. According to statistics, my country produces more than 60 million tons of municipal sludge (80% water content) annually, and industrial sludge production is equally enormous. This sludge contains a large amount of organic matter, heavy metals, and pathogens. If not properly treated, it will not only occupy land resources but may also cause environmental pollution through soil and water bodies, threatening ecological security and human health.

[0003] 1. Traditional pyrolysis technology is usually carried out at high temperatures of 500-800℃ to decompose organic matter in sludge. However, the high temperature environment requires a lot of energy (such as natural gas, electricity, etc.), resulting in high treatment costs.

[0004] 2. Traditional pyrolysis processes easily generate large amounts of tar, which tends to deposit inside the equipment, causing pipe blockage. Therefore, this paper studies and improves upon existing structures and shortcomings, providing a continuous carbonization device for sludge based on porous electrode vacuum pyrolysis, aiming to achieve greater practical value. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a continuous carbonization device for sludge based on porous electrode vacuum pyrolysis, which is achieved by the following specific technical means:

[0006] A continuous sludge carbonization device based on porous electrode vacuum pyrolysis includes a reactor. A sludge conveying channel is formed on the bottom surface of the inner wall of the reactor. An extension pipe communicating with the sludge conveying channel is fixedly installed on the outer wall of the reactor. A motor is fixedly installed on the lower side of the outer wall of the reactor. The output shaft of the motor is fixedly connected to a rotating shaft. The rotating shaft is rotatably mounted within the sludge conveying channel and the extension pipe. Three spiral blades are installed on the rotating shaft. A double-layer honeycomb porous electrode and a baffle are installed inside the sludge conveying channel. A gap exists between the double-layer honeycomb porous electrode and the baffle. A connecting part is fixedly installed at the upper end of the baffle. The connecting part, the baffle, and the double-layer honeycomb porous electrode... A receiving groove is formed between the porous electrodes. The three sections of the spiral blades are respectively located in the mud conveying channel, the receiving groove, and the extension pipe. The surface of the double-layer honeycomb porous electrode is loaded with ZIF-derived carbon catalyst. A heating wire is installed inside the reactor. A stirring assembly is installed inside the reactor. The stirring assembly includes a second motor. The output shaft of the second motor is fixedly connected to a stirring shaft. The stirring shaft is rotatably installed inside the reactor. Several stirring blades are fixedly installed on the stirring shaft. The upper surface of the connecting part is designed with an inclined surface. A shaft hole is opened on the surface of the baffle. The rotating shaft moves through the shaft hole. Several through holes are opened on the surface of the baffle.

[0007] Furthermore, a vacuum pump for evacuating the reactor cavity is installed at the upper end of the reactor.

[0008] Furthermore, a discharge pipe is fixedly installed at the bottom end of the extension pipe, and two sealing plates are movably inserted into the discharge pipe. There is a height difference between the two sealing plates. A fixing plate is fixedly installed on each sealing plate, and a rack is fixedly installed on each fixing plate. A motor is fixedly installed on the outer wall of the discharge pipe, and a gear is fixedly installed on the output shaft of the motor. The gear meshes with the two racks.

[0009] Furthermore, the second motor is fixedly installed at the upper end of the reactor, and vertical plates are fixedly installed on both sides of the bottom surface of the inner wall of the reactor. Each vertical plate is fixedly installed with a feed plate. Both feed plates are inclined and are fixedly connected to the side wall of the reactor.

[0010] Furthermore, a connecting plate is fixedly installed on the side wall of the reactor, and both feed plates are fixedly connected to the connecting plate. The connecting plate has an installation cavity inside, and the upper surface of the reactor has an opening communicating with the installation cavity.

[0011] Furthermore, a connector is fixedly installed at the upper end of the double-layer honeycomb porous electrode, a protrusion is fixedly installed at the top of the connector, a top plate is fixedly installed at the top of the protrusion, the connector is located in the mounting cavity, the protrusion is inserted into the through-hole, the top plate is located at the upper end of the reactor, a sealing ring is provided between the top plate and the through-hole, and a wire is provided on the top plate, the wire being electrically connected to the double-layer honeycomb porous electrode.

[0012] Furthermore, the bottom surface of the double-layer honeycomb porous electrode is provided with a groove, the inner wall of the groove is provided with an insulating sleeve, and a positioning block is fixedly installed on the bottom surface of the inner wall of the mud conveying channel. The double-layer honeycomb porous electrode is movably sleeved on the rotating shaft and the positioning block through the groove.

[0013] Furthermore, the upper surface of the reactor is provided with a feed inlet, a sealing cover is installed at the feed inlet, and a sealing ring is provided between the sealing cover and the feed inlet.

[0014] Furthermore, a connecting block is fixedly installed on the upper end of the top plate, and a fixing component is provided on the upper end of the reactor. The fixing component includes a sliding rod and a threaded rod. A stop rod is fixedly installed on the sliding rod. The bottom surface of the stop rod is in contact with the upper surface of the connecting block, and the inclined surfaces that are in contact are all designed as inclined surfaces.

[0015] Furthermore, a groove is formed on the upper surface of the reactor, a slider is fixedly installed at the bottom end of the slide rod, the slider is slidably installed in the groove, the threaded rod is rotatably installed at the upper end of the reactor, the threaded rod passes through the slide rod and is threadedly connected to the slide rod, a handwheel is fixedly installed on the threaded rod, and a support leg is fixedly installed at the bottom end of the reactor.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] I. This device uses a motor to drive a rotating shaft and three-section spiral blades to achieve continuous conveying of sludge in the sludge conveying channel, receiving tank, and extension pipe. Combined with the crushing effect of the baffle through holes, it increases the contact area between the sludge and the pyrolysis components, thereby improving the pyrolysis efficiency. At the same time, the stirring component fully stirs the sludge during the preheating stage to prevent agglomeration and ensure that the sludge is heated evenly. It works closely with the subsequent continuous conveying process to achieve continuous sludge treatment from feeding to discharging, thereby improving the efficiency of sludge carbonization treatment.

[0018] Second, this device utilizes a vacuum environment (-90kPa) to lower the boiling point of organic matter, and combines the 200-300℃ Joule heat generated by the energization of double-layer honeycomb porous electrodes to achieve low-temperature pyrolysis of sludge. Compared with traditional high-temperature pyrolysis processes, this device completes sludge carbonization at a lower temperature, effectively reducing energy consumption.

[0019] Third, the ZIF-8 derived carbon catalyst loaded on the surface of the double-layer honeycomb porous electrode can promote the reforming reaction of the pyrolysis gas after sludge pyrolysis, convert large molecular organic matter into small molecular gas, inhibit tar formation, reduce the risk of blockage caused by tar deposition inside the equipment, and reduce equipment maintenance costs.

[0020] IV. When installing the double-layer honeycomb porous electrode, the bottom surface is tightly fitted by the groove and the positioning block. The top plate sealing ring is further enhanced by the fixing component. The discharge pipe is inserted alternately by two sealing plates to effectively prevent outside air from entering the reactor, maintain the internal vacuum environment, prevent gas leakage during pyrolysis, and ensure stable operation of the device.

[0021] 5. By rotating the handwheel to drive the threaded rod, the sliding rod and the stop rod can be moved, which facilitates the disassembly and installation of the electrode. When repairing or replacing the electrode, the operation is simple and quick, without complicated tools and cumbersome steps.

[0022] VI. The vertical plates and inclined feed plates inside the reactor work together to guide the sludge to move towards the sludge conveying channel by gravity, reducing sludge residue at the bottom of the reactor and improving sludge conveying efficiency. The inclined surface design of the upper surface of the connection part prevents sludge from accumulating at the connection part, ensuring that the sludge conveying channel is unobstructed, ensuring that the sludge flows continuously and stably in the device, and ensuring the smooth progress of the entire pyrolysis carbonization process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall continuous carbonization device for sludge based on porous electrode vacuum pyrolysis according to the present invention.

[0024] Figure 2 This is a schematic diagram of the vacuum pump of the present invention.

[0025] Figure 3 This is a schematic diagram of the reactor of the present invention cut open.

[0026] Figure 4 This is a schematic diagram of the extension tube of the present invention cut open.

[0027] Figure 5 This is a schematic diagram of the stirring blade of the present invention.

[0028] Figure 6 This is a schematic diagram of the double-layer honeycomb porous electrode of the present invention.

[0029] Figure 7 This is a schematic diagram of the baffle of the present invention.

[0030] Figure 8 This is the present invention. Figure 3 A magnified diagram of point A in the middle.

[0031] Figure 9 This is the present invention. Figure 1A magnified diagram of point B in the middle.

[0032] Figure 10 This is a schematic diagram of the heating wire of the present invention.

[0033] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0034] 1. Reactor; 11. Sludge conveying channel; 12. Vertical plate; 13. Feeding plate; 14. Connecting plate; 15. Mounting cavity; 16. Feed inlet; 17. Support leg; 18. Slide chute; 19. Sealing cover plate; 2. Motor 1; 21. Rotating shaft; 22. Spiral blade; 3. Double-layer honeycomb porous electrode; 31. Groove; 32. Insulating sleeve; 33. Top plate; 34. Protrusion; 35. Wire; 36. Connecting block; 37. Connecting parts; 38. Positioning block; 4. Baffle; 41. Connecting part; 42. Shaft hole; 43. Through hole; 5. Motor II; 51. Stirring shaft; 52. Stirring blade; 6. Vacuum pump; 7. Extension pipe; 71. Discharge pipe; 72. Sealing plate; 73. Fixing plate; 74. Motor III; 75. Gear; 76. Rack; 8. Slide rod; 81. Push rod; 9. Threaded rod; 91. Handwheel; 92. Heating wire. Detailed Implementation

[0035] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0036] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Example:

[0039] As attached Figure 1 To be continued Figure 10 As shown:

[0040] This invention provides a continuous carbonization device for sludge based on vacuum pyrolysis of porous electrodes, including a reactor 1. A sludge conveying channel 11 is provided on the bottom surface of the inner wall of the reactor 1. An extension pipe 7 communicating with the sludge conveying channel 11 is fixedly installed on the outer wall of the reactor 1. A motor 2 is fixedly installed on the lower side of the outer wall of the reactor 1. The output shaft of the motor 2 is fixedly connected to a rotating shaft 21. The rotating shaft 21 is rotatably installed in the sludge conveying channel 11 and the extension pipe 7. Three spiral blades 22 are installed on the rotating shaft 21. A double-layer honeycomb porous electrode 3 and a baffle 4 are installed in the sludge conveying channel 11. There is a gap between the double-layer honeycomb porous electrode 3 and the baffle 4. A connecting part 41 is fixedly installed on the upper end of the baffle 4. A receiving groove is formed between the connecting part 41, the baffle 4 and the double-layer honeycomb porous electrode 3. The three spiral blades 22 are respectively located in the sludge conveying channel 11, the receiving groove and the extension pipe 7. The rotating shaft 21 drives the three spiral blades 22 to rotate, so as to continuously convey the sludge.

[0041] The surface of the double-layer honeycomb porous electrode 3 is loaded with ZIF-8 derived carbon catalyst. The ZIF-8 derived carbon catalyst can promote the reforming reaction of cracked gas. The reforming reaction can convert large molecular organic matter in cracked gas into small molecular gas, while inhibiting the formation of tar.

[0042] The reactor 1 is equipped with a heating wire 92 to heat the reactor 1, thereby preheating the sludge inside the reactor 1;

[0043] The reactor 1 is equipped with a stirring assembly, which includes a motor 2 5. The output shaft of the motor 2 5 is fixedly connected to a stirring shaft 51. The stirring shaft 51 is rotatably installed in the reactor 1. Several stirring blades 52 are fixedly installed on the stirring shaft 51 to stir the sludge in all directions, effectively reducing sludge clumping and making the sludge heat more evenly.

[0044] The upper surface of the connecting part 41 is designed with a slope. The surface of the baffle 4 is provided with a shaft hole 42. The rotating shaft 21 moves through the shaft hole 42. The surface of the baffle 4 is provided with several through holes 43. During the process of passing through the through holes 43, the sludge is further broken down into finer particles, which increases the contact area between the sludge and the subsequent pyrolysis components and prevents larger particles from passing directly through the double-layer honeycomb porous electrode 3 and causing damage.

[0045] A vacuum pump 6 is installed at the upper end of reactor 1 to evacuate the inner cavity of reactor 1, thereby evacuating the inner cavity of reactor 1 to a vacuum environment of -90kPa.

[0046] A discharge pipe 71 is fixedly installed at the bottom end of the extension pipe 7. Two sealing plates 72 are movably inserted into the discharge pipe 71. There is a height difference between the two sealing plates 72. A fixing plate 73 is fixedly installed on each sealing plate 72. A rack 76 is fixedly installed on each fixing plate 73. A motor 74 is fixedly installed on the outer wall of the discharge pipe 71. A gear 75 is fixedly installed on the output shaft of the motor 74. The gears 75 mesh with the two racks 76.

[0047] Motor 25 is fixedly installed at the top of reactor 1. Vertical plates 12 are fixedly installed on both sides of the bottom surface of the inner wall of reactor 1. Each vertical plate 12 is fixedly installed with a feed plate 13. Both feed plates 13 are inclined and fixedly connected to the side wall of reactor 1. This guides the sludge to fall more easily from the feed plate 13 between the two vertical plates 12 and then smoothly into the sludge conveying channel 11, reducing the sludge residue at the bottom of reactor 1 and improving the sludge conveying efficiency.

[0048] A connecting plate 14 is fixedly installed on the side wall of reactor 1. Two feed plates 13 are fixedly connected to the connecting plate 14. An installation cavity 15 is provided inside the connecting plate 14. An opening communicating with the installation cavity 15 is opened on the upper surface of reactor 1. A connector 37 is fixedly installed on the upper end of the double-layer honeycomb porous electrode 3. A protrusion 34 is fixedly installed on the top of the connector 37. A top plate 33 is fixedly installed on the top of the protrusion 34. The connector 37 is located in the installation cavity 15. The protrusion 34 is inserted into the opening. The top plate 33 is located at the upper end of reactor 1. A sealing ring is provided between the top plate 33 and the opening to seal the opening and prevent gas from leaking from the installation cavity 15 and the opening. A wire 35 is provided on the top plate 33. The wire 35 passes through the top plate 33, the protrusion 34 and the connector 37 and is electrically connected to the double-layer honeycomb porous electrode 3, which can install and remove the double-layer honeycomb porous electrode 3.

[0049] The bottom surface of the double-layer honeycomb porous electrode 3 is provided with a groove 31, and the inner wall of the groove 31 is provided with an insulating sleeve 32. The bottom surface of the inner wall of the sludge conveying channel 11 is fixedly installed with a positioning block 38. The double-layer honeycomb porous electrode 3 is movably sleeved on the rotating shaft 21 and the positioning block 38 through the groove 31, so that the bottom surface of the double-layer honeycomb porous electrode 3 is tightly fitted with the bottom surface of the inner wall of the sludge conveying channel 11, effectively preventing sludge from leaking out from the gaps.

[0050] The upper surface of the reactor 1 is provided with a feed inlet 16, and a sealing cover plate 19 is installed at the feed inlet 16. A sealing ring 2 is provided between the sealing cover plate 19 and the feed inlet 16, which plays a role in sealing the feed inlet 16.

[0051] A connecting block 36 is fixedly installed on the upper end of the top plate 33. A fixing component is provided on the upper end of the reactor 1. The fixing component includes a slide rod 8 and a threaded rod 9. A stop rod 81 is fixedly installed on the slide rod 8. The bottom surface of the stop rod 81 is in contact with the upper surface of the connecting block 36, and the inclined surfaces in contact are all inclined. When the stop rod 81 approaches, it applies a downward force to the connecting block 36, so that the sealing ring on the top plate 33 is squeezed, which further enhances the sealing effect and ensures that the double-layer honeycomb porous electrode 3 will not leak during operation. A sliding groove 18 is opened on the upper surface of the reactor 1. A slider is fixedly installed on the bottom end of the slide rod 8. The slider is slidably installed in the sliding groove 18 to limit the movement of the slide rod 8. The threaded rod 9 is rotatably installed on the upper end of the reactor 1. The threaded rod 9 passes through the slide rod 8 and is threadedly connected to the slide rod 8. A handwheel 91 is fixedly installed on the threaded rod 9 to facilitate the rotation of the threaded rod 9. A support leg 17 is fixedly installed on the bottom end of the reactor 1.

[0052] The working principle of this embodiment:

[0053] Step 1: Sludge is fed into reactor 1 through inlet 16. The heating wire 92 pre-installed inside reactor 1 starts working to preheat the sludge. The purpose of preheating is to initially increase the temperature of the sludge and reduce its viscosity, creating more favorable conditions for subsequent stirring and conveying. At this time, motor 2 5 is started. The output shaft of motor 2 5 drives the stirring shaft 51 to rotate. Several stirring blades 52 fixedly installed on the stirring shaft 51 rotate accordingly. During the rotation, the stirring blades 52 stir the sludge in all directions, effectively reducing sludge clumping and making the sludge heated more evenly. After stirring is completed, the sealing cover 19 is covered. The sealing ring 2 between the sealing cover 19 and the inlet 16 ensures the sealing effect of the inlet 16 and prevents outside air from entering the reactor 1. Then, the vacuum pump 6 is started to evacuate the inner cavity of reactor 1 to a vacuum environment of -90kPa. Under low pressure, the boiling point of organic matter in the sludge is lowered, which is more conducive to the subsequent low-temperature pyrolysis reaction.

[0054] Step 2: Start motor 2. The output shaft of motor 2 drives the rotating shaft 21 to rotate. The three spiral blades 22 installed on the rotating shaft 21 rotate synchronously. The three spiral blades 22 are located in the sludge conveying channel 11, the receiving tank, and the extension pipe 7, respectively. During the rotation, the sludge is continuously conveyed by spiral pushing. The sludge is first pushed forward by the spiral blades 22 in the sludge conveying channel 11. When it reaches the baffle 4, the sludge passes through the through holes 43 because the surface of the baffle 4 has several through holes 43. During the process of passing through the through holes 43, the sludge is further broken down into finer particles. The crushed sludge increases the contact area between the sludge and the subsequent pyrolysis components. The crushed sludge continues to be pushed by the spiral blades 22 and passes through the double-layer honeycomb porous electrode 3. After the double-layer honeycomb porous electrode 3 is energized, its surface temperature can reach 200-300℃ based on the Joule heating effect. In a vacuum environment of -90kPa, the lower gas pressure significantly reduces the boiling point of organic matter in the sludge, enabling the sludge to be decomposed at a relatively low temperature. The pyrolyzed sludge continues to move forward under the push of the spiral blades 22 and is transported into the extension tube 7. Finally, it is discharged from the discharge pipe 71 at the bottom of the extension tube 7.

[0055] Step 3: Two sealing plates 72 with a height difference are movably inserted into the discharge pipe 71. Each sealing plate 72 has a fixed plate 73 with a rack 76. The gear 75 installed on the output shaft of the motor 74 on the outer wall of the discharge pipe 71 meshes with the two racks 76. In the initial state, the sealing plate 72 on the upper side is not inserted into the discharge pipe 71, and the sealing plate 72 on the lower side is inserted into the discharge pipe 71. At this time, the discharge pipe 71 is in a semi-closed state, which allows the sludge that has completed pyrolysis to enter the discharge pipe 71 from the extension pipe 7. When it is necessary to discharge the sludge, the motor 74 is started. The motor 74 drives the gear 75 to rotate. The gear 75 drives the two racks 76 to move relative to each other through meshing with the racks 76. By controlling the motor 74 to make the gear 75 rotate forward and reverse, the two sealing plates 72 can be alternately inserted into the discharge pipe 71. The alternating sealing method effectively prevents outside air from entering the reactor 1 and maintains the vacuum environment inside the reactor 1.

[0056] Step 4: The ZIF-8 derived carbon catalyst supported on the surface of the double-layer honeycomb porous electrode 3 promotes the reforming reaction of the pyrolysis gas after sludge pyrolysis. The reforming reaction can convert the large organic molecules in the pyrolysis gas into small molecule gases, while inhibiting the formation of tar. On the one hand, it can avoid tar deposition inside the equipment, reducing equipment blockage and maintenance costs; on the other hand, it improves the quality and utilization value of the pyrolysis gas, making the subsequent treatment of the pyrolysis gas more efficient.

[0057] Step 5: The gas outlet pipe installed on the outer wall of reactor 1 is connected to the electrocatalytic oxidation unit. After the pyrolysis gas enters the electrocatalytic oxidation unit through the pipe, it undergoes deep treatment under the action of Pt / CeO2 catalyst. In the electrocatalytic oxidation unit, harmful components in the pyrolysis gas, such as carbon monoxide (CO), undergo oxidation reaction under the synergistic effect of catalyst and electric field, and are converted into harmless or less harmful substances. After treatment, the CO emission in the tail gas can be controlled to <10ppm, which effectively reduces the pollution caused to the environment by the sludge pyrolysis process.

[0058] Step 6: When it is necessary to disassemble, repair, or replace the double-layer honeycomb porous electrode 3, the operator turns the handwheel 91. The handwheel 91 drives the threaded rod 9 to rotate. Since the threaded rod 9 is threadedly connected to the slide rod 8, the rotation of the threaded rod 9 causes the slide rod 8 to move in the groove 18 on the upper surface of the reactor 1. The abutment 81 fixedly installed on the slide rod 8 moves accordingly. When the abutment 81 disengages from the connecting block 36, it no longer applies force to the top plate 33. At this time, the connecting piece 37 and the double-layer honeycomb porous electrode 3 can be pulled upward from the reactor 1. When installing the double-layer honeycomb porous electrode 3, it is inserted into the installation cavity 15 through the opening. The groove 31 opened on the bottom surface of the double-layer honeycomb porous electrode 3 The double-layer honeycomb porous electrode 3 is fitted onto the surface of the positioning block 38, so that the bottom surface of the double-layer honeycomb porous electrode 3 is tightly fitted with the bottom surface of the inner wall of the sludge conveying channel 11, which effectively prevents sludge from leaking out from the gaps and ensures the sealing and stability of the device operation. After installation, the handwheel 91 is turned in the opposite direction, and the threaded rod 9 reverses and drives the sliding rod 8 and the push rod 81 to move closer to the connecting block 36. Since the bottom surface of the push rod 81 and the upper surface of the connecting block 36 are both designed with slopes, the push rod 81 applies a downward force to the connecting block 36 during the approach process, so that the sealing ring on the top plate 33 is squeezed, which further enhances the sealing effect and ensures that the double-layer honeycomb porous electrode 3 will not leak air during operation.

[0059] Step 7: The two feed plates 13 are inclined, which guides the sludge to fall more easily from the feed plates 13 into the space between the two vertical plates 12, and then smoothly into the sludge conveying channel 11, reducing the sludge residue at the bottom of the reactor 1 and improving the sludge conveying efficiency. The upper surface of the connecting part 41 is also inclined. This design avoids the accumulation of sludge on the connecting part 41, ensuring the smooth flow of the sludge conveying channel, so that the sludge can flow continuously and stably in the device to complete the entire pyrolysis carbonization process.

[0060] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A continuous carbonization device for sludge based on porous electrode vacuum pyrolysis, comprising a reactor (1), characterized in that: The reactor (1) has a sludge conveying channel (11) on the bottom surface of its inner wall. An extension pipe (7) communicating with the sludge conveying channel (11) is fixedly installed on the outer wall of the reactor (1). A motor (2) is fixedly installed on the lower side of the outer wall of the reactor (1). The output shaft of the motor (2) is fixedly connected to a rotating shaft (21). The rotating shaft (21) is rotatably installed in the sludge conveying channel (11) and the extension pipe (7). Three spiral blades (22) are installed on the rotating shaft (21). The sludge conveying channel (11) is equipped with... The device is equipped with a double-layer honeycomb porous electrode (3) and a baffle (4). There is a gap between the double-layer honeycomb porous electrode (3) and the baffle (4). A connecting part (41) is fixedly installed on the upper end of the baffle (4). A receiving groove is formed between the connecting part (41), the baffle (4) and the double-layer honeycomb porous electrode (3). The three spiral blades (22) are located in the mud conveying channel (11), the receiving groove and the extension pipe (7) respectively. The surface of the double-layer honeycomb porous electrode (3) is loaded with ZIF-8 derived carbon catalyst. The reactor (1) is equipped with a heating wire (92) and a stirring assembly. The stirring assembly includes a second motor (5), and the output shaft of the second motor (5) is fixedly connected to a stirring shaft (51). The stirring shaft (51) is rotatably installed inside the reactor (1), and several stirring blades (52) are fixedly installed on the stirring shaft (51). The upper surface of the connecting part (41) is designed with an inclined surface, the surface of the baffle (4) is provided with a shaft hole (42), the rotating shaft (21) moves through the shaft hole (42), and the surface of the baffle (4) is provided with several through holes (43). The upper end of the reactor (1) is equipped with a vacuum pump (6) for evacuating the inner cavity of the reactor (1). The bottom end of the extension tube (7) is fixedly installed with a discharge tube (71). Two sealing plates (72) are movably inserted into the discharge tube (71). There is a height difference between the two sealing plates (72). Each sealing plate (72) is fixedly installed with a fixing plate (73). Each fixing plate (73) is fixedly installed with a rack (76). A motor (74) is fixedly installed on the outer wall of the discharge tube (71). A gear (75) is fixedly installed on the output shaft of the motor (74). The gear (75) meshes with the two racks (76).

2. The sludge continuous carbonization device based on porous electrode vacuum pyrolysis as described in claim 1, characterized in that: The motor 2 (5) is fixedly installed at the upper end of the reactor (1). Vertical plates (12) are fixedly installed on both sides of the bottom surface of the inner wall of the reactor (1). Each vertical plate (12) is fixedly installed with a feed plate (13). Both feed plates (13) are inclined and are fixedly connected to the side wall of the reactor (1).

3. The sludge continuous carbonization device based on porous electrode vacuum pyrolysis as described in claim 2, characterized in that: A connecting plate (14) is fixedly installed on the side wall of the reactor (1). Both feed plates (13) are fixedly connected to the connecting plate (14). An installation cavity (15) is provided inside the connecting plate (14). An opening communicating with the installation cavity (15) is provided on the upper surface of the reactor (1).

4. The sludge continuous carbonization device based on porous electrode vacuum pyrolysis as described in claim 3, characterized in that: A connector (37) is fixedly installed on the upper end of the double-layer honeycomb porous electrode (3). A protrusion (34) is fixedly installed on the top end of the connector (37). A top plate (33) is fixedly installed on the top end of the protrusion (34). The connector (37) is located in the mounting cavity (15). The protrusion (34) is inserted into the through-hole. The top plate (33) is located at the upper end of the reactor (1). A sealing ring is provided between the top plate (33) and the through-hole. A wire (35) is provided on the top plate (33). The wire (35) is electrically connected to the double-layer honeycomb porous electrode (3).

5. The sludge continuous carbonization device based on porous electrode vacuum pyrolysis as described in claim 4, characterized in that: The bottom surface of the double-layer honeycomb porous electrode (3) is provided with a groove (31), and an insulating sleeve (32) is provided at the groove (31). A positioning block (38) is fixedly installed on the bottom surface of the inner wall of the mud conveying channel (11). The double-layer honeycomb porous electrode (3) is movably sleeved on the rotating shaft (21) and the positioning block (38) through the groove (31).

6. The sludge continuous carbonization device based on porous electrode vacuum pyrolysis as described in claim 5, characterized in that: The reactor (1) has an inlet (16) on its upper surface. A sealing cover (19) is installed at the inlet (16), and a sealing ring is provided between the sealing cover (19) and the inlet (16).

7. The sludge continuous carbonization device based on porous electrode vacuum pyrolysis as described in claim 6, characterized in that: A connecting block (36) is fixedly installed on the upper end of the top plate (33), and a fixing component is provided on the upper end of the reactor (1). The fixing component includes a slide rod (8) and a threaded rod (9). A push rod (81) is fixedly installed on the slide rod (8). The bottom surface of the push rod (81) is in contact with the upper surface of the connecting block (36), and the inclined surfaces that are in contact are all inclined surfaces.

8. The sludge continuous carbonization device based on porous electrode vacuum pyrolysis as described in claim 7, characterized in that: The upper surface of the reactor (1) is provided with a groove (18), and a slider is fixedly installed at the bottom end of the slide rod (8). The slider is slidably installed in the groove (18). The threaded rod (9) is rotatably installed at the upper end of the reactor (1). The threaded rod (9) passes through the slide rod (8) and is threadedly connected to the slide rod (8). A handwheel (91) is fixedly installed on the threaded rod (9). The bottom end of the reactor (1) is fixedly equipped with a support leg (17).

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