Bottom mud treatment device and bottom mud treatment method

Abstract

The invention discloses a bottom mud treatment device and a bottom mud treatment method, and relates to the technical field of bottom mud treatment. The bottom mud treatment device comprises a device body, and the device body comprises a fixed cylinder, a rotating cylinder rotating in the fixed cylinder and a pyrolysis desorption cavity located between the fixed cylinder and the rotating cylinder; and the rotating cylinder comprises a rotating pipe rotationally connected with the fixed cylinder. According to the bottom mud treatment device, the pyrolysis desorption cavity is designed to be of a thin structure, the radial thickness of the pyrolysis desorption cavity is small, the thickness of digestion residues can be conveniently controlled, accumulation is avoided, meanwhile, the digestion residues are gradually gathered in the forward pushing process, the digestion residues in the pyrolysis desorption cavity can be fully filled and make contact with a fixed cylinder and a rotating cylinder, and in addition, the pyrolysis desorption cavity can be separated from the fixed cylinder and the rotating cylinder. The inner surface and the outer surface of digestion residues in the pyrolysis desorption cavity can be synchronously heated, the pyrolysis efficiency and quality can be improved, the heat utilization rate is increased, and then the bottom mud treatment efficiency and effect are improved.

Description

Technical Field

[0001] This invention relates to the field of sediment treatment technology, specifically to a sediment treatment device and a sediment treatment method. Background Technology

[0002] Currently, the main methods for treating river and lake sediment are incineration or landfill. While incineration can rapidly reduce volume, it generates large amounts of CO2 and dioxins, while landfill occupies land and poses a risk of heavy metal leakage. In recent years, technologies such as biocomposting and solidification stabilization have been gradually applied, but they generally suffer from low organic matter conversion efficiency (<50%) and incomplete solidification of heavy metals (leaching toxicity exceeding standards by more than 30%). To address these existing technical problems, an optimized treatment method can be adopted, incorporating anaerobic digesters, sludge pyrolysis furnaces, flue gas treatment units, and mineral sorting and activation systems. In this method, the sediment first enters the anaerobic digester to convert organic matter into biogas. The digestion residue is then dehydrated and transported to the pyrolysis furnace. During the pyrolysis stage, heavy metals are solidified at 200-300℃, organic matter is pyrolyzed at 400-500℃, and biochar is activated by phosphoric acid spraying. After the exhaust gas is treated by a ceramic membrane dust collector, CO2 is absorbed by the MEA solvent, and the concentrate is injected into the photobioreactor. The digested solid phase is separated into aluminosilicates by eddy current separation and reacted with NaOH solution to generate zeolite precursors. After molding and curing, it is formed into blocks. The energy conversion rate of organic components reaches 85%, which is 40% higher than that of single anaerobic digestion. The leaching toxicity of heavy metals is reduced by 98% (Cd < 0.1 mg / L, Pb < 0.5 mg / L). The net CO2 emission is reduced by 76% compared with the incineration method, and the carbon sequestration of each ton of bottom mud is ≥ 0.5 tons. 100% of the mineral components are converted into building material raw materials, and the compressive strength of the geopolymer blocks is ≥ 35 MPa.

[0003] However, in existing sludge treatment devices, when the digested residue enters the sludge pyrolysis desorption furnace for pyrolysis, the heating module is located on the outside of the furnace body, and a screw propeller is used to push the digested residue. Due to the large distance between the screw shaft and the furnace body, the material is basically at the bottom of the furnace body during the conveying process, and the material accumulates thickly. This makes it difficult to fully adhere to the inner wall of the pyrolysis desorption chamber for heat exchange, which not only affects the efficiency and effect of pyrolysis, but also leads to low heat utilization, thus affecting the efficiency and effect of sludge treatment. Summary of the Invention

[0004] The purpose of this invention is to provide a sediment treatment device and a sediment treatment method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sediment treatment device, comprising a device body, the device body including a fixed cylinder, a rotating cylinder rotating inside the fixed cylinder, and a thermal desorption chamber located between the fixed cylinder and the rotating cylinder; the rotating cylinder including a rotating tube rotatably connected to the fixed cylinder; the device body also including auger blades connected to the rotating cylinder and disposed within the thermal desorption chamber; the device body also including a first electric heating module disposed on the outer wall of the fixed cylinder and a second electric heating module disposed on the inner wall of the rotating cylinder; the device body also including an inlet and an outlet communicating with the thermal desorption chamber; the device body also including an annular cover sliding within the thermal desorption chamber and a resistance mechanism for providing resistance to the movement of the annular cover, so that the digested residue after thermal desorption can push the annular cover to move and be discharged through the outlet.

[0006] Preferably, the resistance mechanism includes a push rod, a first disc connected to the push rod, and a pressing assembly for pressing the first disc; the push rod passes through the fixed cylinder and abuts against the annular cover; the resistance mechanism further includes a first telescopic sleeve rod connected between the annular cover and the fixed cylinder; the pressing assembly includes a moving block, a pressing block abutting against the first disc, and a pressure control assembly connected between the pressing block and the moving block; the pressing assembly further includes a moving module connected between the moving block and the fixed cylinder.

[0007] Preferably, the pressure control assembly includes a second telescopic sleeve connected between the moving block and the extrusion block and a first spring connected within the second telescopic sleeve; the pressure control assembly also includes a scale plate connected to the moving block and a pointer connected to the extrusion block.

[0008] Preferably, the main body of the device further includes an agitation mechanism disposed within the pyrolysis desorption chamber for agitating the digested residue; the agitation mechanism includes an agitator disposed within the pyrolysis desorption chamber, a second disc disposed within a rotating cylinder, and a rotating rod connecting the agitator and the second disc; the rotating rod passes through the rotating cylinder; the agitation mechanism further includes a fixed ring connected to the rotating cylinder, a rotating ring rotating with the fixed ring, and a second spring connecting the rotating ring and the second disc; the fixed ring and the rotating ring are sleeved on the outside of the rotating rod; the second spring is sleeved on the outside of the rotating rod; the agitation mechanism further includes a plurality of conical blocks connected to the second disc, a mounting plate connected to the rotating cylinder, and a plurality of stops connected to the mounting plate, allowing the conical blocks to slide on the sidewalls of the stops; the agitation mechanism further includes a first drive assembly for driving the rotating rod to rotate.

[0009] Preferably, the first drive assembly includes a rotating shaft rotatably connected to the mounting plate, a plurality of keyways formed on the side wall of the rotating shaft, and a plurality of insert rods sliding in the keyways and connected to the rotating rod; the first drive assembly also includes a sprocket connected to the rotating shaft, a chain driven by the sprocket, and a first power assembly for driving the rotating shaft to rotate.

[0010] Preferably, the first power assembly includes a first driving bevel gear, a first driven bevel gear meshing with the first driving bevel gear, and a connecting shaft connecting the first driven bevel gear and the rotating shaft; the first power assembly also includes a first motor connected to the rotating tube and a first power shaft connecting the first motor and the first driving bevel gear.

[0011] Preferably, the main body of the device further includes a drive mechanism for driving the rotating cylinder to rotate; the drive mechanism includes a driven gear connected to the rotating cylinder, a driving gear meshing with the driven gear, and a second power component for driving the driving gear to rotate; the second power component includes a second motor, a second power shaft connected between the second motor and the driving gear, and a mounting bracket connected between the second motor and the fixed cylinder.

[0012] Preferably, the main body of the device further includes a crushing mechanism for crushing the digested residue entering the feed inlet; the crushing mechanism includes a material box communicating with the feed inlet, a feed valve communicating with the material box, and a feed hopper communicating with the feed valve; the crushing mechanism also includes a lifting plate sliding in the material box and a lifting module connected between the lifting plate and the material box; the crushing mechanism also includes a grid blade connected to the feed inlet, a cutting blade connected to the grid blade, and a second drive assembly for driving the cutting blade to rotate; the second drive assembly includes a sealing box connected to the feed inlet, a second driving bevel gear disposed in the sealing box, and a second driven bevel gear meshing with the second driving bevel gear; the second drive assembly also includes a drive shaft connected between the cutting blade and the second driven bevel gear and a transmission assembly connected between the second driving bevel gear and the second power shaft; the transmission assembly includes a transmission rod connected to the second driving bevel gear, a driven pulley connected to the transmission rod, and a driving pulley connected to the second power shaft; the transmission assembly also includes a belt connected between the driven pulley and the driving pulley.

[0013] Preferably, the crushing mechanism further includes a preheating mechanism for preheating the digested residue in the hopper; the preheating mechanism includes a horizontal pipe connected to the hopper, a vertical pipe communicating with the horizontal pipe, and an exhaust pipe communicating with the top of the hopper; the lifting plate is sleeved on the side wall of the vertical pipe; the preheating mechanism further includes a fan communicating with the horizontal pipe, a flexible hose connected with the annular cover, and a connecting pipe communicating between the flexible hose and the fan; the connecting pipe is connected to the fixed cylinder and extends into the heat desorption chamber; the preheating mechanism further includes multiple air extraction holes communicating with the annular cover.

[0014] A method for treating bottom sediment, using a bottom sediment treatment device, includes the following steps:

[0015] S1: When in use, the bottom sludge first enters the anaerobic digester for treatment. The multi-strain anaerobic digester is used to ferment the organic matter into biogas (methane content > 60%) through stage fermentation by thermophilic methanogenic bacteria (55℃) and mesophilic hydrolytic bacteria (35℃). The digestion residue is dehydrated by a spiral and the moisture content is reduced to below 45%.

[0016] S2: Next, open the feed valve and feed the dehydrated digested residue into the feed hopper. Then, it enters the material box through the feed valve and is positioned below the lifting plate. Then, the lifting module drives the lifting plate to move downward along the vertical pipe, which can squeeze the digested residue in the material box and crush it under the action of the grid knife. At the same time, start the second motor, which drives the active pulley to rotate through the second power shaft. Simultaneously, the belt drives the driven pulley and transmission rod to rotate. When the transmission rod rotates, it can drive the second active bevel gear to rotate, which in turn drives the cutting knife to rotate through the second driven bevel gear and drive shaft. This can crush the digested residue that has passed through the grid knife a second time. This not only avoids the digested residue from clogging the pyrolysis desorption chamber, but also improves the efficiency and quality of subsequent pyrolysis.

[0017] S3: The crushed digestion residue enters the pyrolysis desorption chamber between the rotating cylinder and the fixed cylinder. At the same time, when the second power shaft rotates, it can drive the drive gear to rotate, which in turn drives the rotating tube and the rotating cylinder to rotate through the driven gear, and then drives the auger blades to rotate. At this time, the digestion residue can be gradually pushed forward and conveyed. Because the distance between the rotating cylinder and the fixed cylinder is small, the pyrolysis desorption chamber has a thin structure with a small radial thickness, which makes it easy to control the thickness of the digestion residue, avoid accumulation, and improve the efficiency and quality of pyrolysis.

[0018] S4: At the same time, during pyrolysis, the first electric heating module and the second electric heating module are activated to heat the inside and outside of the digested residue in the pyrolysis desorption chamber, which can improve the efficiency and quality of pyrolysis.

[0019] S5: When the rotating drum rotates, it can drive multiple agitation mechanisms to rotate synchronously. It also starts the first motor, which drives the first driving bevel gear to rotate through the first power shaft. At the same time, it drives the sprocket to rotate through the first driven bevel gear and the connecting shaft. In turn, it drives multiple rotating shafts to rotate synchronously through the sprocket and the chain. When the rotating shafts rotate, they can drive the second disc, the rotating rod and the agitator frame to rotate through the keyway and the insert rod.

[0020] S6: When the second disc rotates, it drives the conical block to rotate. When the conical block abuts against the side wall of the stop, it pushes the second disc upward. At the same time, the rotating rod drives the stirring frame to move upward. The second spring is compressed, and the insert rod slides upward along the keyway. When the conical block passes the stop, the second disc can move downward and reset under the action of the second spring. The rotating rod drives the stirring frame to move downward and reset. This process is repeated, so that the stirring frame moves up and down and rotates at the same time. This not only breaks up the agglomerated digestion residue, but also agitates it, making the heating more uniform and improving the efficiency and quality of pyrolysis.

[0021] S7: When the digested residue in the pyrolysis desorption chamber continues to be pushed forward and comes into contact with the annular cover, the annular cover will not be moved under the action of the resistance mechanism. At the same time, the digested residue can gradually accumulate during the forward push. After the digested residue in the pyrolysis desorption chamber is filled and comes into contact with the fixed cylinder and the rotating cylinder, the annular cover can be moved under the pushing force of the digested residue. At the same time, the first telescopic sleeve retracts, so that the annular cover can move above the discharge port, so that the pyrolysis residue after pyrolysis can be discharged through the discharge port. This ensures that the digested residue is completely filled in the pyrolysis desorption chamber and comes into contact with the fixed cylinder and the rotating cylinder, which can improve the efficiency and quality of pyrolysis and improve the utilization rate of heat.

[0022] S8: Furthermore, during pyrolysis, the blower is started, which can absorb the high-temperature gas generated by pyrolysis through the air extraction hole. Then, the gas enters the horizontal and vertical pipes through the annular cover, hose and connecting pipe, and is then discharged through the exhaust pipe for treatment. At this time, the residual heat of the high-temperature gas can be used to preheat the digestion residue in the material box, which can not only improve the efficiency of subsequent pyrolysis, but also be more energy-saving and environmentally friendly.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] This type of sediment treatment device and method, through the setting of resistance mechanisms, etc., designs the thermal desorption chamber as a thin structure with a small radial thickness, which facilitates the control of the thickness of the digested residue and avoids accumulation. At the same time, it allows the digested residue to gradually accumulate as it is pushed forward, so that the digested residue in the thermal desorption chamber is filled and in contact with the fixed and rotating cylinders. Furthermore, it can simultaneously heat the inside and outside of the digested residue in the thermal desorption chamber, which can improve the efficiency and quality of pyrolysis and increase the utilization rate of heat, thereby improving the efficiency and effect of sediment treatment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a cross-sectional view of the fixed cylinder in this invention;

[0027] Figure 3 This is a cross-sectional view of the fixed cylinder, rotating cylinder, and material box in this invention.

[0028] Figure 4 This is a schematic diagram of the structure of the first power component in this invention;

[0029] Figure 5 This is a schematic diagram of the agitation mechanism and the first drive assembly in this invention;

[0030] Figure 6 This is a schematic diagram of the structure of the second driving component in this invention;

[0031] Figure 7 This is a schematic diagram of the resistance mechanism in this invention;

[0032] Figure 8 This is a schematic diagram of the resistance mechanism from another perspective in this invention;

[0033] Figure 9 This is a partial cross-sectional view of the second telescopic sleeve in this invention.

[0034] In the diagram: 101, fixed cylinder; 102, rotating cylinder; 103, discharge port; 104, feed port; 105, auger blade; 106, rotating tube; 107, annular cover; 108, first electric heating module; 109, second electric heating module; 201, first telescopic sleeve; 202, moving module; 203, moving block; 204, top rod; 205, first disc; 206, extrusion block; 301, second... Telescopic sleeve; 302, pointer; 303, first spring; 304, scale plate; 401, fixed ring; 402, rotating ring; 403, rotating rod; 404, stirring frame; 405, second disc; 406, second spring; 407, conical block; 408, stop block; 501, mounting plate; 502, rotating shaft; 503, keyway; 504, insertion rod; 601, vertical tube; 602, horizontal tube; 603 604. Fan; 605. Connecting pipe; 606. Air extraction port; 607. Exhaust pipe; 608. Hose; 701. Sprocket; 702. Chain; 703. First driven bevel gear; 704. Connecting shaft; 705. First motor; 706. First drive shaft; 707. First driving bevel gear; 801. Material box; 802. Feed valve; 803. Feed hopper; 804. Lifting plate; 805. Lifting module; 806. 6. Grid blade; 807. Cutting blade; 901. Driven gear; 902. Mounting bracket; 903. Drive gear; 904. Second power shaft; 905. Second motor; 1001. Sealing box; 1002. Drive shaft; 1003. Second driven bevel gear; 1004. Transmission rod; 1005. Second drive bevel gear; 1006. Driven pulley; 1007. Drive pulley; 1008. Belt. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1-9This invention provides a bottom sediment treatment device, comprising a main body, which includes a fixed cylinder 101, a rotating cylinder 102 rotatably inside the fixed cylinder 101, and a thermal desorption chamber located between the fixed cylinder 101 and the rotating cylinder 102; the rotating cylinder 102 includes a rotating tube 106 rotatably connected to the fixed cylinder 101; the main body also includes auger blades 105 connected to the rotating cylinder 102 and disposed within the thermal desorption chamber; the main body further includes a first electric heating module 108 disposed on the outer wall of the fixed cylinder 101 and a second electric heating module 109 disposed on the inner wall of the rotating cylinder 102; both the first electric heating module 108 and the second electric heating module 109 are provided with heat insulation covers on their outer sides; the main body also includes an inlet 104 communicating with the thermal desorption chamber and an outlet... The device body also includes an annular cover 107 sliding within the pyrolysis desorption chamber and a resistance mechanism that provides resistance to the movement of the annular cover 107, allowing the digested residue after pyrolysis to push the annular cover 107 to move and be discharged through the outlet 103. The pyrolysis desorption chamber is designed with a thin structure and a small radial thickness, which facilitates control of the thickness of the digested residue and avoids accumulation. At the same time, it allows the digested residue to gradually accumulate as it is pushed forward, so that the digested residue in the pyrolysis desorption chamber is filled and contacts the fixed cylinder 101 and the rotating cylinder 102. Furthermore, it can simultaneously heat the inside and outside of the digested residue in the pyrolysis desorption chamber, which can improve the efficiency and quality of pyrolysis and increase the utilization rate of heat, thereby improving the efficiency and effect of bottom sludge treatment.

[0037] The resistance mechanism includes a push rod 204, a first disc 205 connected to the push rod 204, and a pressing assembly for pressing the first disc 205; the push rod 204 passes through the fixed cylinder 101 and abuts against the annular cover 107; the resistance mechanism also includes a first telescopic sleeve rod 201 connected between the annular cover 107 and the fixed cylinder 101; the pressing assembly includes a moving block 203, a pressing block 206 abutting against the first disc 205, and a pressure control assembly connecting the pressing block 206 and the moving block 203; the pressing assembly also includes a moving module 202 connected between the moving block 203 and the fixed cylinder 101, which moves when the digested residue in the thermal desorption chamber continues to be pushed forward and abuts against the annular cover 107. At this time, under the action of the resistance mechanism, the annular cover 107 will not be moved. At the same time, the digested residue can be gradually accumulated during the forward pushing process. After the digested residue in the pyrolysis desorption chamber is filled and contacts the fixed cylinder 101 and the rotating cylinder 102, the annular cover 107 can be moved under the pushing force of the digested residue. At the same time, the first telescopic sleeve 201 retracts, so that the annular cover 107 can move above the discharge port 103, so that the pyrolysis residue after pyrolysis can be discharged through the discharge port 103. This ensures that the digested residue is completely filled in the pyrolysis desorption chamber and contacts the fixed cylinder 101 and the rotating cylinder 102, which can improve the efficiency and quality of pyrolysis and improve the utilization rate of heat.

[0038] The pressure control component includes a second telescopic sleeve 301 connected between the moving block 203 and the extrusion block 206, and a first spring 303 connected within the second telescopic sleeve 301. The pressure control component also includes a scale plate 304 connected to the moving block 203 and a pointer 302 connected to the extrusion block 206. The moving module 202 drives the moving block 203 to move, and the pressure control component drives the extrusion block 206 to move, causing the extrusion block 206 to abut against the first disc 205. The first spring 303 is gradually compressed. By observing the scale indicated by the pointer 302 on the scale plate 304, the compression amount of the first spring 303 can be determined. This allows for adjustment and control of the extrusion pressure of the extrusion block 206 on the first disc 205. Furthermore, the push rod 204 provides resistance to the annular cover 107, facilitating adjustment of the resistance of the annular cover 107 according to usage requirements, i.e., adjusting the compactness of the digested residue in the thermal desorption chamber, thus enhancing adaptability.

[0039] The main body of the device also includes an agitation mechanism disposed within the pyrolysis desorption chamber for agitating the digested residue; the agitation mechanism includes an agitator 404 disposed within the pyrolysis desorption chamber, a second disc 405 disposed within the rotating cylinder 102, and a rotating rod 403 connecting the agitator 404 and the second disc 405; the rotating rod 403 passes through the rotating cylinder 102; the agitation mechanism also includes a fixed ring 401 connected to the rotating cylinder 102, a rotating ring 402 rotating with the fixed ring 401, and a connecting ring 402. A second spring 406 is connected between the rotating ring 402 and the second disk 405; a fixed ring 401 and a rotating ring 402 are sleeved on the outside of the rotating rod 403; the second spring 406 is sleeved on the outside of the rotating rod 403; the stirring mechanism also includes a plurality of conical blocks 407 connected to the second disk 405, a mounting plate 501 connected to the rotating cylinder 102, and a plurality of stops 408 connected to the mounting plate 501, so that the conical blocks 407 can slide on the side wall of the stops 408; the stirring mechanism also includes The first drive assembly drives the rotating rod 403 to rotate, which in turn drives the stirring frame 404 to rotate. When the second disc 405 rotates, it drives the conical block 407 to rotate. When the conical block 407 abuts against the side wall of the stop block 408, it pushes the second disc 405 upward. At the same time, the rotating rod 403 drives the stirring frame 404 upward, compressing the second spring 406. The insertion rod 504 slides upward along the keyway 503. When the conical block 407 passes the stop block 408, the second disc 405 moves downward and resets under the action of the second spring 406. The rotating rod 403 drives the stirring frame 404 downward and resets. This process repeats, allowing the stirring frame 404 to move up and down while rotating. This not only breaks up the agglomerated digestion residue but also agitates it, making the heating more uniform and improving the efficiency and quality of pyrolysis.

[0040] The first drive assembly includes a rotating shaft 502 rotatably connected to a mounting plate 501, multiple keyways 503 formed on the side wall of the rotating shaft 502, and multiple insert rods 504 sliding within the keyways 503 and connected to the rotating rod 403. The first drive assembly also includes a sprocket 701 connected to the rotating shaft 502, a chain 702 driven by the sprocket 701, and a first power assembly that drives the rotating shaft 502 to rotate. The first power assembly drives the rotating shaft 502 to rotate, which in turn drives the multiple rotating shafts 502 to rotate synchronously through the sprocket 701 and the chain 702. When the rotating shaft 502 rotates, it can drive the second disc 405, the rotating rod 403, and the agitator 404 to rotate through the keyways 503 and the insert rods 504, thus achieving synchronous rotation of the multiple rotating shafts 502 and making it more convenient and faster to use.

[0041] The first power assembly includes a first driving bevel gear 707, a first driven bevel gear 703 meshing with the first driving bevel gear 707, and a connecting shaft 704 connecting the first driven bevel gear 703 and the rotating shaft 502. The first power assembly also includes a first motor 705 connected to the rotating tube 106 and a first power shaft 706 connecting the first motor 705 and the first driving bevel gear 707. When the first motor 705 is started, the first driving bevel gear 707 is driven to rotate through the first power shaft 706. At the same time, the sprocket 701 is driven to rotate through the first driven bevel gear 703 and the connecting shaft 704. In turn, the sprocket 701 and the chain 702 drive multiple rotating shafts 502 to rotate synchronously, making it more convenient and faster to use. In addition, the first motor 705 is placed outside the rotating tube 102 to facilitate heat dissipation and maintenance.

[0042] The main body of the device also includes a drive mechanism for driving the rotating cylinder 102 to rotate; the drive mechanism includes a driven gear 901 connected to the rotating tube 106, a driving gear 903 meshing with the driven gear 901, and a second power component for driving the driving gear 903 to rotate; the second power component includes a second motor 905, a second power shaft 904 connected between the second motor 905 and the driving gear 903, and a mounting bracket 902 connected between the second motor 905 and the fixed cylinder 101. When the second motor 905 is started, the driving gear 903 is driven to rotate through the second power shaft 904, and then the rotating tube 106 and the rotating cylinder 102 are driven to rotate through the driven gear 901, which facilitates the deceleration of the rotation of the rotating cylinder 102 and avoids excessive speed.

[0043] The main body of the device also includes a crushing mechanism for crushing the digested residue entering the feed inlet 104; the crushing mechanism includes a material box 801 communicating with the feed inlet 104, a feed valve 802 communicating with the material box 801, and a feed hopper 803 communicating with the feed valve 802; the crushing mechanism also includes a lifting plate 804 sliding within the material box 801 and a lifting module 805 connecting the lifting plate 804 and the material box 801; the crushing mechanism also includes a grid blade 806 connected to the feed inlet 104, a cutting blade 807 connected to the grid blade 806, and a mechanism for driving the cutting blade 807 to rotate. The second drive assembly includes a sealed housing 1001 connected to the feed inlet 104, a second driving bevel gear 1005 disposed within the sealed housing 1001, and a second driven bevel gear 1003 meshing with the second driving bevel gear 1005. The second drive assembly also includes a drive shaft 1002 connecting the cutting blade 807 and the second driven bevel gear 1003, and a transmission assembly connecting the second driving bevel gear 1005 and the second power shaft 904. The transmission assembly includes a transmission rod 1004 connected to the second driving bevel gear 1005, and a transmission rod 1004 connected to the transmission rod 1004. The transmission assembly includes a driven pulley 1006 connected to the driven pulley 1006 and a driving pulley 1007 connected to the second power shaft 904; the transmission assembly also includes a belt 1008 connected between the driven pulley 1006 and the driving pulley 1007. The feed valve 802 is opened, and the dehydrated digested residue is fed into the feed hopper 803. Then, it enters the material box 801 through the feed valve 802 and is positioned below the lifting plate 804. Then, the lifting module 805 drives the lifting plate 804 to move downwards along the vertical pipe 601, which can squeeze the digested residue in the material box 801. The mesh blade 806... Under the action of the first crushing, when the second power shaft 904 rotates, it can drive the driven pulley 1006 and the transmission rod 1004 to rotate through the belt 1008. When the transmission rod 1004 rotates, it can drive the second driving bevel gear 1005 to rotate, and then drive the cutting blade 807 to rotate through the second driven bevel gear 1003 and the drive shaft 1002. This can perform secondary crushing on the digested residue that has passed through the grid blade 806, which can not only prevent the digested residue from clogging the pyrolysis desorption chamber, but also improve the efficiency and quality of subsequent pyrolysis.

[0044] The crushing mechanism also includes a preheating mechanism for preheating the digested residue in the hopper 801; the preheating mechanism includes a horizontal pipe 602 connected to the hopper 801, a vertical pipe 601 connected to the horizontal pipe 602, and an exhaust pipe 606 connected to the top of the hopper 801; a lifting plate 804 is sleeved on the side wall of the vertical pipe 601; the preheating mechanism also includes a fan 603 connected to the horizontal pipe 602, a flexible hose 607 connected to the annular cover 107, and a connecting pipe 604 connecting the flexible hose 607 and the fan 603; the connecting pipe 604 is connected to the fixed cylinder 101 and passes through... The gas is passed into the pyrolysis desorption chamber. The preheating mechanism also includes multiple exhaust holes 605 connected to the annular cover 107. During pyrolysis, the fan 603 is started, which can absorb the high-temperature gas generated by pyrolysis through the exhaust holes 605. Then, the gas enters the horizontal pipe 602 and the vertical pipe 601 through the annular cover 107, the hose 607 and the connecting pipe 604. Then, it is discharged through the exhaust pipe 606 for treatment. At this time, the residual heat of the high-temperature gas can be used to preheat the digested residue in the material box 801, which can not only improve the efficiency of subsequent pyrolysis, but also save energy and protect the environment.

[0045] A method for treating bottom sediment, using a bottom sediment treatment device, includes the following steps:

[0046] S1: When in use, the bottom sludge first enters the anaerobic digester for treatment. The multi-strain anaerobic digester is used. The organic matter is converted into biogas with a methane content of >60% through staged fermentation by thermophilic methanogens at 55℃ and mesophilic hydrolytic bacteria at 35℃. The digestion residue is dehydrated by a spiral and the moisture content is reduced to below 45%.

[0047] S2: Next, open the feed valve 802 and feed the dehydrated digested residue into the feed hopper 803. Then, it enters the material box 801 through the feed valve 802 and is positioned below the lifting plate 804. After feeding is completed, close the feed valve 802. Then, the lifting module 805 drives the lifting plate 804 to move downward along the vertical pipe 601, which can squeeze the digested residue in the material box 801 and crush it once under the action of the grid knife 806. At the same time, start the second motor 905 and drive the second power shaft 904 to... The driving pulley 1007 rotates, and at the same time, the driven pulley 1006 and the transmission rod 1004 rotate via the belt 1008. When the transmission rod 1004 rotates, it can drive the second driving bevel gear 1005 to rotate, which in turn drives the cutting blade 807 to rotate via the second driven bevel gear 1003 and the drive shaft 1002. This can perform secondary crushing on the digested residue that has passed through the mesh blade 806, which can not only prevent the digested residue from clogging the pyrolysis desorption chamber, but also improve the efficiency and quality of subsequent pyrolysis.

[0048] S3: The crushed digestion residue enters the pyrolysis desorption chamber between the rotating cylinder 102 and the fixed cylinder 101. At the same time, when the second power shaft 904 rotates, it can drive the drive gear 903 to rotate, which in turn drives the rotating tube 106 and the rotating cylinder 102 to rotate through the driven gear 901, and then drives the auger blades 105 to rotate. At this time, the digestion residue can be gradually pushed forward and conveyed. Since the distance between the rotating cylinder 102 and the fixed cylinder 101 is small, the pyrolysis desorption chamber has a thin structure with a small radial thickness, which makes it easy to control the thickness of the digestion residue, avoid accumulation, and improve the efficiency and quality of pyrolysis.

[0049] S4: At the same time, during pyrolysis, the first electric heating module 108 and the second electric heating module 109 are activated to heat the inside and outside of the digested residue in the pyrolysis desorption chamber, which can improve the efficiency and quality of pyrolysis.

[0050] S5: When the rotating drum 102 rotates, it can drive multiple agitation mechanisms to rotate synchronously. In addition, the first motor 705 is started, which drives the first driving bevel gear 707 to rotate through the first power shaft 706. At the same time, the first driven bevel gear 703 and the connecting shaft 704 drive the sprocket 701 to rotate. Then, the sprocket 701 and the chain 702 drive multiple rotating shafts 502 to rotate synchronously. When the rotating shaft 502 rotates, it can drive the second disc 405, the rotating rod 403 and the agitator 404 to rotate through the keyway 503 and the insert rod 504.

[0051] S6: When the second disk 405 rotates, it drives the conical block 407 to rotate. When the conical block 407 abuts against the side wall of the stop block 408, it pushes the second disk 405 upward. At the same time, the rotating rod 403 drives the stirring frame 404 to move upward. The second spring 406 is compressed, and the insertion rod 504 slides upward along the keyway 503. When the conical block 407 passes the stop block 408, the second disk 405 can move downward and reset under the action of the second spring 406. The rotating rod 403 drives the stirring frame 404 to move downward and reset. This process is repeated, so that the stirring frame 404 moves up and down and rotates at the same time. This not only breaks up the agglomerated digestion residue, but also agitates it, making the heating more uniform and improving the efficiency and quality of pyrolysis.

[0052] S7: When the digested residue in the pyrolysis desorption chamber continues to be pushed forward and comes into contact with the annular cover 107, the annular cover 107 will not be moved under the action of the resistance mechanism. At the same time, the digested residue can gradually accumulate during the forward push. After the digested residue in the pyrolysis desorption chamber is filled and comes into contact with the fixed cylinder 101 and the rotating cylinder 102, the annular cover 107 can be moved under the pushing force of the digested residue. At the same time, the first telescopic sleeve 201 retracts, so that the annular cover 107 can move above the discharge port 103, so that the pyrolysis residue after pyrolysis can be discharged through the discharge port 103. This ensures that the digested residue is completely filled in the pyrolysis desorption chamber and comes into contact with the fixed cylinder 101 and the rotating cylinder 102, thereby improving the efficiency and quality of pyrolysis and increasing the utilization rate of heat.

[0053] S8: Furthermore, during pyrolysis, the blower 603 is started, which can absorb the high-temperature gas generated by pyrolysis through the exhaust port 605. Then, the gas enters the horizontal pipe 602 and the vertical pipe 601 through the annular cover 107, the hose 607 and the connecting pipe 604, and is then discharged through the exhaust pipe 606 for treatment. At this time, the residual heat of the high-temperature gas can be used to preheat the digested residue in the material box 801, which can not only improve the efficiency of subsequent pyrolysis, but also save energy and protect the environment.

[0054] The pyrolysis desorption chamber is designed with a thin structure and a small radial thickness, which makes it easy to control the thickness of the digested residue and avoid accumulation. At the same time, the digested residue gradually gathers as it is pushed forward, so that the digested residue in the pyrolysis desorption chamber is filled and contacts the fixed cylinder 101 and the rotating cylinder 102. Furthermore, the inner and outer surfaces of the digested residue in the pyrolysis desorption chamber can be heated simultaneously, which can improve the efficiency and quality of pyrolysis and increase the utilization rate of heat, thereby improving the efficiency and effect of bottom sediment treatment.

[0055] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0056] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A sediment treatment device, comprising a main body, characterized in that: The main body of the device includes a fixed cylinder (101), a rotating cylinder (102) rotating inside the fixed cylinder (101), and a heat desorption chamber located between the fixed cylinder (101) and the rotating cylinder (102); the rotating cylinder (102) includes a rotating tube (106) rotatably connected to the fixed cylinder (101); the main body of the device also includes an auger blade (105) connected to the rotating cylinder (102) and disposed in the heat desorption chamber; the main body of the device also includes a first electric heating module (108) disposed on the outer wall of the fixed cylinder (101) and a second electric heating module (109) disposed on the inner wall of the rotating cylinder (102); the main body of the device also includes an inlet (104) and an outlet (103) communicating with the heat desorption chamber; the main body of the device also includes an annular cover (107) sliding in the heat desorption chamber and a resistance mechanism for providing resistance to the movement of the annular cover (107), so that the digested residue after heat desorption can push the annular cover (107) to move and be discharged through the outlet (103).

2. The sediment treatment device according to claim 1, characterized in that: The resistance mechanism includes a push rod (204), a first disc (205) connected to the push rod (204), and a pressing assembly for pressing the first disc (205); the push rod (204) is disposed through the fixed cylinder (101) and can abut against the annular cover (107); the resistance mechanism also includes a first telescopic sleeve rod (201) connected between the annular cover (107) and the fixed cylinder (101); the pressing assembly includes a moving block (203), a pressing block (206) abutting against the first disc (205), and a pressure control assembly connected between the pressing block (206) and the moving block (203); the pressing assembly also includes a moving module (202) connected between the moving block (203) and the fixed cylinder (101).

3. The sediment treatment device according to claim 2, characterized in that: The pressure control assembly includes a second telescopic sleeve (301) connected between the moving block (203) and the pressing block (206) and a first spring (303) connected within the second telescopic sleeve (301); the pressure control assembly also includes a scale plate (304) connected to the moving block (203) and a pointer (302) connected to the pressing block (206).

4. The sediment treatment device according to claim 1, characterized in that: The main body of the device also includes a stirring mechanism disposed within the pyrolysis desorption chamber for stirring the digested residue; the stirring mechanism includes a stirring frame (404) disposed within the pyrolysis desorption chamber, a second disc (405) disposed within the rotating cylinder (102), and a rotating rod (403) connecting the stirring frame (404) and the second disc (405); the rotating rod (403) passes through the rotating cylinder (102); the stirring mechanism also includes a fixed ring (401) connected to the rotating cylinder (102), a rotating ring (402) rotating with the fixed ring (401), and a mechanism connecting the rotating ring (402) and the second disc (405). The second spring (406) between the second disc (405) and the rotating ring (402) is sleeved on the outside of the rotating rod (403); the second spring (406) is sleeved on the outside of the rotating rod (403); the stirring mechanism also includes a plurality of conical blocks (407) connected to the second disc (405), a mounting plate (501) connected to the rotating cylinder (102) and a plurality of stops (408) connected to the mounting plate (501), so that the conical blocks (407) can slide on the side wall of the stops (408); the stirring mechanism also includes a first driving assembly for driving the rotating rod (403) to rotate.

5. A sediment treatment device according to claim 4, characterized in that: The first drive assembly includes a rotating shaft (502) rotatably connected to the mounting plate (501), a plurality of keyways (503) opened on the side wall of the rotating shaft (502), and a plurality of insert rods (504) sliding in the keyways (503) and connected to the rotating rod (403); the first drive assembly also includes a sprocket (701) connected to the rotating shaft (502), a chain (702) driven by the sprocket (701), and a first power assembly that drives the rotating shaft (502) to rotate.

6. A sediment treatment device according to claim 5, characterized in that: The first power assembly includes a first driving bevel gear (707), a first driven bevel gear (703) meshing with the first driving bevel gear (707), and a connecting shaft (704) connecting the first driven bevel gear (703) and the rotating shaft (502); the first power assembly also includes a first motor (705) connected to the rotating tube (106) and a first power shaft (706) connecting the first motor (705) and the first driving bevel gear (707).

7. A sediment treatment device according to claim 1, characterized in that: The main body of the device also includes a drive mechanism for driving the rotating cylinder (102) to rotate; the drive mechanism includes a driven gear (901) connected to the rotating tube (106), a driving gear (903) meshing with the driven gear (901), and a second power component for driving the driving gear (903) to rotate; the second power component includes a second motor (905), a second power shaft (904) connected between the second motor (905) and the driving gear (903), and a mounting bracket (902) connected between the second motor (905) and the fixed cylinder (101).

8. A sediment treatment device according to claim 1, characterized in that: The main body of the device also includes a crushing mechanism for crushing the digested residue entering the feed inlet (104); the crushing mechanism includes a material box (801) communicating with the feed inlet (104), a feed valve (802) communicating with the material box (801), and a feed hopper (803) communicating with the feed valve (802); the crushing mechanism also includes a lifting plate (804) sliding in the material box (801) and a lifting module (805) connecting the lifting plate (804) and the material box (801); the crushing mechanism also includes a grid blade (806) connected with the feed inlet (104), a cutting blade (807) connected with the grid blade (806), and a second drive assembly for driving the cutting blade (807) to rotate; the second drive assembly includes a sealing box (1001) connected with the feed inlet (104), and a... The second drive assembly includes a second driving bevel gear (1005) and a second driven bevel gear (1003) meshing with the second driving bevel gear (1005) within a sealed box (1001); the second drive assembly also includes a drive shaft (1002) connected between the cutting blade (807) and the second driven bevel gear (1003) and a transmission assembly connected between the second driving bevel gear (1005) and the second power shaft (904); the transmission assembly includes a transmission rod (1004) connected to the second driving bevel gear (1005), a driven pulley (1006) connected to the transmission rod (1004), and a driving pulley (1007) connected to the second power shaft (904); the transmission assembly also includes a belt (1008) connected between the driven pulley (1006) and the driving pulley (1007).

9. A sediment treatment device according to claim 8, characterized in that: The crushing mechanism also includes a preheating mechanism for preheating the digested residue in the hopper (801); the preheating mechanism includes a horizontal pipe (602) connected to the hopper (801), a vertical pipe (601) connected to the horizontal pipe (602), and an exhaust pipe (606) connected to the top of the hopper (801); the lifting plate (804) is sleeved on the side wall of the vertical pipe (601); the preheating mechanism also includes a fan (603) connected to the horizontal pipe (602), a hose (607) connected to the annular cover (107), and a connecting pipe (604) connecting the hose (607) and the fan (603); the connecting pipe (604) is connected to the fixed cylinder (101) and extends into the heat desorption chamber; the preheating mechanism also includes a plurality of exhaust holes (605) connected to the annular cover (107).

10. A method for treating bottom sediment, using the bottom sediment treatment device as described in claim 9, characterized in that: Includes the following steps: S1: When in use, the bottom sludge first enters the anaerobic digester for treatment. The multi-strain anaerobic digester is used to convert organic matter into biogas through staged fermentation by thermophilic methanogenic bacteria and mesophilic hydrolytic bacteria, and the digestion residue is dehydrated by spiral dehydration. S2: The dehydrated digestion residue is crushed by the crushing mechanism and fed into the feed box (801). The high-temperature gas generated by pyrolysis can be used by the preheating mechanism to preheat the digestion residue in the feed box (801). S3: The crushed digestive residue enters the thermal desorption chamber between the rotating cylinder (102) and the fixed cylinder (101). At the same time, the rotating tube (106) and the rotating cylinder (102) are driven to rotate by the driving mechanism, which in turn drives the auger blades (105) to rotate. At this time, the digestive residue can be gradually pushed forward and transported. S4: At the same time, during pyrolysis, the first electric heating module (108) and the second electric heating module (109) are activated to heat the inside and outside of the digested residue in the pyrolysis desorption cavity. S5: When the rotating drum (102) rotates, it can drive multiple agitation mechanisms to rotate synchronously, thereby breaking up and agitating the agglomerated digestion residue; S6: When the digested residue in the pyrolysis desorption chamber continues to be pushed forward and comes into contact with the annular cover (107), the annular cover (107) will not be pushed to move under the action of the resistance mechanism. At the same time, the digested residue can gradually accumulate during the forward push. After the digested residue in the pyrolysis desorption chamber is filled and comes into contact with the fixed cylinder (101) and the rotating cylinder (102), the annular cover (107) can be moved under the pushing force of the digested residue, so that the annular cover (107) can move to the top of the discharge port (103) and the pyrolysis residue after pyrolysis can be discharged through the discharge port (103).

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