Low-energy-consumption municipal sludge dehydration and pyrolysis integrated equipment

Abstract

The invention discloses low-energy-consumption municipal sludge dehydration and pyrolysis integrated equipment. The equipment comprises a sludge crushing mechanism, a sludge pulsation dehydration mechanism, a sludge vacuum dehydration mechanism and a sludge pyrolysis mechanism which are connected in sequence, the sludge crushing mechanism comprises a sludge crushing containing barrel shell, a crushing main stirring shaft is rotationally connected into the sludge crushing containing barrel shell, and a plurality of sludge crushing rods are fixed to the crushing main stirring shaft; the sludge pulsation dewatering mechanism comprises a dewatering mechanism containing box, an extrusion dewatering input pipe and an extrusion dewatering output pipe which are coaxially arranged are fixed to the left end and the right end of the dewatering mechanism containing box respectively, and a flexible pulsation dewatering pipe is arranged between the extrusion dewatering input pipe and the extrusion dewatering output pipe; the equipment has the core advantages of integrated integration, low-energy-consumption design, efficient treatment, precise control, environmental protection and reliability, the whole treatment process can be seamlessly joined, the problems of sludge scattering, secondary pollution and moisture content rising in traditional segmented treatment are avoided, and the transfer energy consumption and the labor cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, specifically to a low-energy integrated dewatering and pyrolysis equipment for urban sludge. Background Technology

[0002] Currently, we face the dual challenges of sludge disposal difficulties and the ecological crisis of saline-alkali land. As of 2025, the annual production of urban sludge (based on an 80% moisture content) has exceeded 60 million tons, characterized by "high moisture content (initial 75-99%), high pollution risk, and difficulty in volume reduction." Approximately 60% is disposed of through landfill, occupying about 150 million cubic meters of land resources annually. Furthermore, the greenhouse effect of methane released from landfills is 28-34 times that of CO2. Incineration poses a risk of dioxin emissions, while composting easily spreads heavy metals. Crucially, the high moisture content (98-99%) means that dewatering energy consumption accounts for over 60% of the entire process. Traditional dewatering technologies typically only reduce the moisture content to 80%, which is insufficient for pyrolysis or incineration. In addition, sludge generally exhibits characteristics of "low organic matter and high sand content," limiting the application of anaerobic digestion. Although the developed chemical conditioning and dewatering technology can reduce the moisture content to below 65%, the added flocculants and other additives cause the calorific value of the sludge to decrease by about 10%, affecting the resource utilization efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a low-energy integrated equipment for dewatering and pyrolysis of urban sludge, ensuring precise and controllable sludge pyrolysis process and significantly improving sludge pyrolysis conversion rate.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A low-energy integrated urban sludge dewatering and pyrolysis equipment includes a sludge crushing mechanism, a sludge pulse dewatering mechanism, a sludge vacuum dewatering mechanism, and a sludge pyrolysis mechanism connected in sequence. The sludge crushing mechanism includes a sludge crushing container shell with its axis extending vertically. A crushing main stirring shaft is rotatably connected inside the sludge crushing container shell and arranged coaxially therewith. Multiple sludge crushing rods are fixed on the crushing main stirring shaft. The sludge pulse dewatering mechanism includes a dewatering mechanism housing box. Coaxially arranged extrusion dewatering input pipe and extrusion dewatering output pipe are fixed at the left and right ends of the dewatering mechanism housing box, respectively. A flexible pulse dewatering pipe is provided between the extrusion dewatering input pipe and the extrusion dewatering output pipe. Multiple sets of extrusion drive mechanisms are provided on the inner side wall of the dehydration mechanism's container. The sludge vacuum dewatering mechanism includes a vacuum dewatering container shell, a vacuum dewatering sliding trough with its opening facing upward and arranged at an inclination is fixed inside the vacuum dewatering container shell, and a vacuum dewatering input pipe is provided above the higher end of the vacuum dewatering sliding trough. A vacuum dewatering collection box with an upward opening is fixed at the bottom of the vacuum dewatering container, located below the lower end of the vacuum dewatering sliding trough. A sludge discharge conveyor is installed in the vacuum dewatering collection box. The sludge pyrolysis mechanism includes a pyrolysis mechanism support base plate. A vertically extending, hollow annular pyrolysis conveying outer ring shell is fixed to the top of the pyrolysis mechanism support base plate. A coaxial, hollow annular core pyrolysis ring shell is provided on the inner side of the pyrolysis conveying outer ring shell. A vertically extending heating channel is formed inside the core pyrolysis ring shell. Multiple vertically extending heating gas delivery pipes are provided in the heating channel, and multiple combustion nozzles are provided on the outside of the heating gas delivery pipes. The upper part of the outer ring shell for pyrolysis conveying is connected to the upper part of the core pyrolysis ring shell through multiple sludge transfer connecting pipes.

[0005] Preferably, a sludge crushing inlet pipe connected to the interior is provided on the outer side of the sludge crushing container shell near the upper end, and a sludge crushing outlet pipe connected to the interior is provided on the outer side of the sludge crushing container shell near the bottom. The sludge crushing output pipe is connected to the extrusion dewatering input pipe, and a sludge crushing conveyor is installed on the sludge crushing output pipe. The extrusion dehydration output pipe is connected to the vacuum dehydration input pipe; The bottom of the dehydration mechanism's receiving tank is fixed with a dehydration filtrate discharge pipe that is connected to its interior; The outer side of the pyrolysis conveying outer ring shell is provided near the bottom and is connected to the interior of the pyrolysis initial input pipe. The output end of the sludge discharge conveyor is connected to the pyrolysis initial input pipe through the vacuum dewatering output pipe. The lower end of the core pyrolysis ring shell has a pyrolysis slag discharge port that is connected to its interior.

[0006] Note: The biochar produced by sludge pyrolysis will flow from top to bottom inside the core pyrolysis ring and finally be discharged from the pyrolysis slag discharge port. These biochars can be collected and stored in a unified manner.

[0007] Preferably, a crushing revolution rotating ring is rotatably connected inside the sludge crushing container shell, and a sludge crushing support beam extending radially along the inner side of the crushing revolution rotating ring is fixed therein. The sludge crushing support beam has a vertically penetrating main stirring shaft connection hole, and the crushing main stirring shaft is rotatably connected in the main stirring shaft connection hole. A main drive housing is fixed on the upper side of the sludge crushing support beam. The upper end of the crushing main stirring shaft extends into the main drive housing. A main stirring drive motor is fixed inside the main drive housing. A main stirring drive gear is fixed on the output shaft of the main stirring drive motor. A main stirring driven gear is fixed at one end of the crushing main stirring shaft that extends into the main drive housing. The main stirring drive gear and the main stirring driven gear are meshed and connected.

[0008] Explanation: The output shaft of the main stirring drive motor drives the main stirring shaft to rotate through the meshing connection between the main stirring drive gear and the main stirring driven gear. The main stirring shaft then drives multiple sludge crushing rods to rotate together, and the sludge is crushed by the shearing action of the multiple sludge crushing rods.

[0009] Preferably, the sludge crushing support beam is provided with an additional crushing mechanism, which includes an additional crushing connection hole that is opened vertically through the sludge crushing support beam, an additional crushing shaft that is rotatably connected in the additional crushing connection hole, and multiple additional crushing blades that are fixed on the additional crushing shaft. An auxiliary drive housing is fixed on the upper side of the sludge crushing support beam. The upper end of the auxiliary crushing shaft extends into the auxiliary drive housing. An auxiliary drive motor is fixed inside the auxiliary drive housing. An auxiliary drive gear is fixed on the output shaft of the auxiliary drive motor. An auxiliary driven gear is fixed at one end of the auxiliary crushing shaft that extends into the auxiliary drive housing. The auxiliary drive gear and the auxiliary driven gear are meshed and connected.

[0010] Note: As the additional crushing blades rotate with the additional crushing shaft, they also revolve around the axis of the crushing revolution ring, thus enabling more comprehensive crushing of the sludge inside the sludge crushing container.

[0011] Preferably, the extrusion drive mechanism includes two pulsating extrusion fixed cylinders with openings facing each other and arranged coaxially on the inner side wall of the dehydration mechanism receiving box, a pulsating extrusion sliding cylinder is slidably connected in the pulsating extrusion fixed cylinder, and a pulsating extrusion arc plate is fixed at the outer end of the pulsating extrusion sliding cylinder. The pulsating extrusion fixed cylinder is equipped with a pulsating extrusion drive rod for driving the pulsating extrusion sliding cylinder to move; Multiple extrusion drive mechanisms are arranged along the axial direction of the flexible pulsating dehydration tube.

[0012] Explanation: Under physical compression, the water in the sludge permeates through the side wall of the flexible pulsating dewatering pipe and drips into the bottom of the dewatering mechanism's receiving tank. The sludge filtrate collected at the bottom of the dewatering mechanism's receiving tank is then discharged through the dewatering filtrate discharge pipe.

[0013] Preferably, a vacuum drive container is fixed to the outside of the vacuum dehydration container shell. The vacuum drive container is equipped with a vacuum pump and multiple vacuum tanks. The vacuum tanks are connected to the inside of the vacuum dehydration container shell through a vacuum connecting pipe. A vacuum control valve is provided on the vacuum connecting pipe. The input end of the vacuum pump is connected to the inside of each vacuum tank through a vacuum suction pipe, and a suction control valve is installed on the vacuum suction pipe.

[0014] Explanation: Vacuuming is performed inside the vacuum dehydration container. In a vacuum environment, the boiling point of water is significantly reduced, allowing the water in the sludge to evaporate and escape more easily, further reducing the moisture content of the sludge.

[0015] Preferably, the upper end of the core pyrolysis ring shell is provided with a core migration drive mechanism. The core migration drive mechanism includes a migration drive ring plate that is slidably connected to the inside of the core pyrolysis ring shell in a vertical direction. Multiple vertically extending migration drive columns are fixed on the upper side of the migration drive ring plate. Multiple vertically extending migration drive receiving cylinders are fixed at the top of the core pyrolysis ring shell. The upper ends of the multiple migration drive columns extend into the inside of each migration drive receiving cylinder. A migration drive telescopic rod for driving the migration drive columns to move is provided in the migration drive receiving cylinder.

[0016] Explanation: The core migration drive mechanism facilitates the downward flow of sludge within the core pyrolysis ring shell. During its downward movement, the migration drive ring plate assists in driving the sludge within the core pyrolysis ring shell, allowing the sludge to flow more smoothly from top to bottom.

[0017] Preferably, the upper end of the heating channel is provided with a heating exhaust pipe, and the lower end of the heating channel is provided with a combustion air conveying shell, which is connected to a combustion air conveyor via a combustion air conveying pipe.

[0018] Explanation: The combustion air conveyor supplies air into the combustion air delivery housing through the combustion air delivery pipe. The air then enters the heating channel and flows from bottom to top. The methane gas in the heating gas delivery pipe is sprayed out from multiple combustion nozzles and ignited. The air continuously provides oxygen to support the combustion process.

[0019] Preferably, a waste heat recovery pipe is spirally wound around the outer side of the pyrolysis conveying outer ring shell, and the upper end of the waste heat recovery pipe is connected to the upper end of the heating exhaust pipe. A heat-assisted pipe is laid at the bottom of the vacuum dehydration sliding tank, and the heat-assisted pipe is connected to the lower end of the waste heat recovery pipe.

[0020] Explanation: The exhaust gas produced by combustion will be discharged through the heated exhaust gas exhaust pipe and guided to the waste heat recovery pipeline, so that the heat in the exhaust gas can be exchanged with the pyrolysis conveying outer ring shell, thereby preheating the sludge in the pyrolysis conveying outer ring shell.

[0021] Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects: 1. The present invention has a reasonable structural design. Its core advantages are integrated design, low energy consumption, high efficiency, precise control and environmental protection and reliability. The entire process can be seamlessly connected, avoiding the problems of sludge scattering, secondary pollution and moisture content rebound in traditional segmented treatment, and reducing transportation energy consumption and labor costs. 2. This invention is easy to operate and adopts a composite crushing mechanism with homogenization pretreatment, which facilitates the improvement of subsequent processing efficiency. The main crushing stirring shaft rotates and the core crushing is achieved through the sludge crushing rod. The auxiliary crushing shaft is eccentrically arranged and, together with the auxiliary crushing blades, can specifically crush large clumps of sludge. The multiple crushing actions make the sludge particle size more uniform. 3. This invention employs a two-stage dehydration synergistic effect, which can deeply reduce the moisture content and lay the foundation for low-energy pyrolysis. The first-stage pulsed dehydration mechanism can achieve dynamic dehydration, which can improve the filtrate permeability and avoid clogging. The second-stage vacuum dehydration mechanism further removes interstitial water and reduces sludge viscosity through low-temperature preheating, thereby improving the vacuum dehydration effect. After two-stage dehydration, the sludge moisture content can be reduced to below 35%. 4. This invention adopts a ring-shaped uniform heating design to achieve energy-saving pyrolysis effect. The efficient pyrolysis combined with waste heat recovery also achieves the goal of low energy consumption. The heat radiation coverage during the heating process is without dead angles, and the uniformity of sludge heating is improved by more than 40%, avoiding coking or incomplete pyrolysis problems caused by local overheating. 5. The core migration drive mechanism of this invention pushes the migration ring plate through an electrically controlled telescopic rod, so as to realize the uniform downward movement of sludge in the ring shell, ensuring that the pyrolysis residence time is accurately controllable, the pyrolysis conversion rate is over 95%, and the sludge reduction rate is over 80%. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall layout of the present invention; Figure 2 This is a schematic diagram of the sludge crushing mechanism of the present invention; Figure 3 This is a schematic diagram of the sludge pulsating dewatering mechanism of the present invention; Figure 4 This is a top view of the sludge pulsating dewatering mechanism of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the flexible pulsating dehydration pipe of the present invention; Figure 6 This is a schematic diagram of the sludge vacuum dewatering mechanism of the present invention; Figure 7 This is a schematic diagram of the sludge pyrolysis mechanism of the present invention; Figure 8 This is a schematic diagram of the structure of the pyrolysis products discharged from the shell according to the present invention.

[0023] In the diagram, 10-sludge crushing mechanism, 101-sludge crushing input pipe, 102-sludge crushing output pipe, 103-sludge crushing conveyor, 11-sludge crushing container shell, 12-crushing main stirring shaft, 120-sludge crushing rod, 121-main drive container box, 122-main stirring drive motor, 123-main stirring drive gear, 124-main stirring driven gear, 13-crushing revolution rotating ring, 14-sludge crushing support beam, 141-main stirring shaft connection hole, 15-additional crushing mechanism, 151-additional crushing shaft, 152-additional crushing blade, 15 3-Additional drive housing, 154-Additional drive motor, 155-Additional drive gear, 156-Additional driven gear, 20-Sludge pulse dewatering mechanism, 201-Dewatered filtrate discharge pipe, 21-Dewatering mechanism housing, 221-Extrusion dewatering input pipe, 222-Extrusion dewatering output pipe, 23-Flexible pulse dewatering pipe, 230-Flexible rubber tube, 231-Filter cloth, 24-Extrusion drive mechanism, 241-Pulsating extrusion fixed cylinder, 242-Pulsating extrusion sliding cylinder, 243-Pulsating extrusion arc plate, 244-Pulsating extrusion drive rod, 30-Sludge vacuum Dewatering mechanism, 31-vacuum dewatering container, 311-vacuum dewatering input pipe, 32-vacuum dewatering sliding trough, 33-vacuum dewatering collecting box, 331-sludge discharge conveyor, 332-vacuum dewatering output pipe, 34-vacuum drive container, 341-vacuum pump, 342-vacuum tank, 343-vacuum connecting pipe, 3430-vacuum control valve, 344-vacuum suction pipe, 40-sludge pyrolysis mechanism, 401-pyrolysis mechanism support base plate, 402-waste heat recovery pipe, 403-pyrolysis initial input pipe, 404-pyrolysis slag discharge port, 41-pyrolysis conveyor 410-Sludge transfer connecting pipe, 42-Core pyrolysis ring shell, 420-Heating channel, 43-Heating gas delivery pipe, 431-Combustion nozzle, 44-Core migration drive mechanism, 441-Migration drive ring plate, 442-Migration drive column, 443-Migration drive receiving cylinder shell, 444-Migration drive telescopic rod, 451-Heating exhaust gas discharge pipe, 452-Combustion air delivery shell, 453-Combustion air delivery pipe, 454-Combustion air conveyor, 46-Pyrolysis product discharge shell, 460-Pyrolysis product flow hole, 461-Pyrolysis product discharge pipe. Detailed Implementation

[0024] The following is combined with Figures 1-8 The present invention will be described in detail. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of the respective main view or structural schematic diagram.

[0025] Example 1: A low-energy integrated dewatering and pyrolysis equipment for municipal sludge, such as... Figure 1As shown, it includes a sludge crushing mechanism 10, a sludge pulse dewatering mechanism 20, a sludge vacuum dewatering mechanism 30 and a sludge pyrolysis mechanism 40 connected in sequence. like Figure 2 As shown, the sludge crushing mechanism 10 includes a sludge crushing container shell 11 with its axis extending vertically. A crushing main stirring shaft 12 is rotatably connected inside the sludge crushing container shell 11 and is arranged coaxially with it. Multiple sludge crushing rods 120 are fixed on the crushing main stirring shaft 12. like Figure 3 As shown, the sludge pulse dewatering mechanism 20 includes a dewatering mechanism housing box 21. The left and right ends of the dewatering mechanism housing box 21 are respectively fixed with a coaxially arranged extrusion dewatering input pipe 221 and extrusion dewatering output pipe 222. A flexible pulse dewatering pipe 23 is provided between the extrusion dewatering input pipe 221 and the extrusion dewatering output pipe 222. The flexible pulsating dehydration tube 23 consists of a flexible rubber tube 230 and a filter cloth 231 fixed to the outside of the flexible rubber tube 230. The flexible rubber tube 230 is an existing technology product. For example, the flexible rubber tube 230 can be made of fluororubber. The filter cloth 231 is an existing technology product. For example, it can be made of PTFE pure material membrane filter cloth. The flexible rubber tube 230 has multiple micropores extending radially through its sidewall, with a micropore diameter of 0.1 mm. The filter cloth 231 is a high-strength material filter cloth of the prior art. Multiple sets of extrusion drive mechanisms 24 are provided on the inner side wall of the dehydration mechanism receiving box 21; like Figure 4 As shown, the extrusion drive mechanism 24 includes two pulsating extrusion fixed cylinders 241 with openings facing each other and coaxially arranged on the inner side wall of the dehydration mechanism receiving box 21. The axial direction of the pulsating extrusion fixed cylinder 241 is perpendicular to the axial direction of the flexible pulsating dehydration tube 23, and the flexible pulsating dehydration tube 23 is located between the two pulsating extrusion fixed cylinders 241. A pulsating extrusion sliding cylinder 242 is slidably connected in the pulsating extrusion fixed cylinder 241, and a pulsating extrusion arc plate 243 is fixed at the outer end of the pulsating extrusion sliding cylinder 242. The pulsating extrusion fixed cylinder 241 is provided with a pulsating extrusion drive rod 244 for driving the pulsating extrusion sliding cylinder 242 to move. The pulsating extrusion drive rod 244 is an existing electrically controlled telescopic rod driven by a servo motor. The outer rod end of the pulsating extrusion drive rod 244 is fixedly connected to the pulsating extrusion fixed cylinder 241, and the inner rod end of the pulsating extrusion drive rod 244 is fixedly connected to the pulsating extrusion sliding cylinder 242. Multiple extrusion drive mechanisms 24 are arranged along the axial direction of the flexible pulsating dehydration tube 23.

[0026] like Figure 6As shown, the sludge vacuum dewatering mechanism 30 includes a vacuum dewatering housing 31, and a vacuum dewatering sliding groove 32 with its opening facing upward and arranged at an inclination is fixed inside the vacuum dewatering housing 31. A vacuum dewatering input pipe 311 is provided above the higher end of the vacuum dewatering sliding groove 32. A vacuum dewatering collection box 33 with an upward opening is fixed at the bottom of the vacuum dewatering container 31, located below the lower end of the vacuum dewatering sliding groove 32. A sludge discharge conveyor 331 is provided in the vacuum dewatering collection box 33. like Figure 6 As shown, a vacuum drive container 34 is fixed on the outside of the vacuum dehydration container 31. The vacuum drive container 34 is equipped with a vacuum pump 341 and multiple vacuum tanks 342. The vacuum tanks 342 are connected to the inside of the vacuum dehydration container 31 through a vacuum connecting pipe 343. A vacuum control valve 3430 is provided on the vacuum connecting pipe 343. The input end of the vacuum pump 341 is connected to the inside of each vacuum tank 342 through the vacuum suction pipe 344, and the vacuum suction pipe 344 is equipped with a suction control valve 3440.

[0027] Vacuum pump 341 and vacuum tank 342 are commercially available products of the prior art; Vacuum control valve 3430 and suction control valve 3440 are both commercially available electrically controlled valves based on existing technology. like Figure 7 As shown, the sludge pyrolysis mechanism 40 includes a pyrolysis mechanism support base plate 401. A vertically extending annular and hollow pyrolysis conveying outer ring shell 41 is fixed on the top of the pyrolysis mechanism support base plate 401. An annular and hollow core pyrolysis ring shell 42 is provided on the inner side of the pyrolysis conveying outer ring shell 41. A vertically extending heating channel 420 is formed inside the core pyrolysis ring shell 42. Multiple vertically extending heating gas delivery pipes 43 are provided in the heating channel 420, and multiple combustion nozzles 431 are provided on the outside of the heating gas delivery pipes 43. The upper interior of the pyrolysis conveying outer ring shell 41 is connected to the upper interior of the core pyrolysis ring shell 42 through multiple sludge transfer connecting pipes 410.

[0028] like Figure 2 As shown, a sludge crushing container shell 11 is provided on the outer side near the upper end, and a sludge crushing input pipe 101 connected to the interior is provided on the outer side near the bottom, and a sludge crushing output pipe 102 connected to the interior is provided on the outer side of the sludge crushing container shell 11. The sludge crushing output pipe 102 is connected to the extrusion dewatering input pipe 221, and a sludge crushing conveyor 103 is provided on the sludge crushing output pipe 102. The extrusion dehydration output pipe 222 is connected to the vacuum dehydration input pipe 311; like Figure 3As shown, the bottom of the dehydration mechanism receiving box 21 is fixed with a dehydration filtrate discharge pipe 201 that is connected to its interior; A pyrolysis initial input pipe 403 is provided on the outer side of the pyrolysis conveying outer ring shell 41 near the bottom, which is connected to the interior of the pyrolysis initial input pipe 403. The output end of the sludge discharge conveyor 331 is connected to the pyrolysis initial input pipe 403 through a vacuum dewatering output pipe 332. like Figure 7 As shown, the lower end of the core pyrolysis ring shell 42 has a pyrolysis slag discharge port 404 that is connected to its interior.

[0029] Example 2: Based on Example 1, such as Figure 2 As shown, a crushing revolution rotating ring 13 is rotatably connected inside the sludge crushing container shell 11 and is coaxial with it. A sludge crushing support beam 14 extending radially is fixed inside the crushing revolution rotating ring 13. The sludge crushing support beam 14 has a vertically penetrating main stirring shaft connection hole 141. The main stirring shaft connection hole 141 is coaxial with the crushing revolution rotating ring 13. The crushing main stirring shaft 12 is rotatably connected in the main stirring shaft connection hole 141. The crushing revolution rotating ring 13 is driven by a prior art servo motor fixed on the inner wall of the sludge crushing container shell 11 to rotate around the vertical axis of the sludge crushing container shell 11 via gear ring transmission. A main drive housing 121 is fixed on the upper side of the sludge crushing support beam 14. The upper end of the crushing main stirring shaft 12 extends into the main drive housing 121. A main stirring drive motor 122 is fixed inside the main drive housing 121. A main stirring drive gear 123 is fixed on the output shaft of the main stirring drive motor 122. A main stirring driven gear 124 is fixed at one end of the crushing main stirring shaft 12 that extends into the main drive housing 121. The main stirring drive gear 123 and the main stirring driven gear 124 are meshed and connected.

[0030] Example 3: Based on Example 2, such as Figure 2 As shown, an additional crushing mechanism 15 is provided on the sludge crushing support beam 14. The additional crushing mechanism 15 includes an additional crushing connection hole 150 that is opened vertically on the sludge crushing support beam 14. An additional crushing shaft 151 is rotatably connected in the additional crushing connection hole 150. Multiple additional crushing blades 152 are fixed on the additional crushing shaft 151. The eccentricity between the additional crushing connection hole 150 and the crushing revolution rotating ring 13 is two-thirds of the radius of the crushing revolution rotating ring 13; An auxiliary drive housing 153 is fixed on the upper side of the sludge crushing support beam 14. The upper end of the auxiliary crushing shaft 151 extends into the auxiliary drive housing 153. An auxiliary drive motor 154 is fixed inside the auxiliary drive housing 153. An auxiliary drive gear 155 is fixed on the output shaft of the auxiliary drive motor 154. An auxiliary driven gear 156 is fixed at one end of the auxiliary crushing shaft 151 that extends into the auxiliary drive housing 153. The auxiliary drive gear 155 and the auxiliary driven gear 156 are meshed and connected.

[0031] Example 4: Based on Example 3, such as Figure 7 As shown, a core migration drive mechanism 44 is provided at the upper end of the core pyrolysis ring shell 42. The core migration drive mechanism 44 includes a migration drive ring plate 441 that is slidably connected to the inside of the core pyrolysis ring shell 42 in a vertical direction. Multiple vertically extending migration drive columns 442 are fixed on the upper side of the migration drive ring plate 441. Multiple vertically extending migration drive receiving cylinder shells 443 are fixed at the top of the core pyrolysis ring shell 42. The upper ends of the multiple migration drive columns 442 extend into the interior of each migration drive receiving cylinder shell 443. A migration drive telescopic rod 444 for driving the migration drive columns 442 to move is provided in the migration drive receiving cylinder shell 443. The migration drive telescopic rod 444 is an electrically controlled telescopic rod driven by a servo motor in the prior art. The outer rod end of the migration drive telescopic rod 444 is fixedly connected to the top of the migration drive receiving cylinder shell 443, and the inner rod end of the migration drive telescopic rod 444 is fixedly connected to the upper end of the migration drive column 442.

[0032] Example 5: Based on Example 4, such as Figure 7 As shown, the upper end of the heating channel 420 is provided with a heating exhaust pipe 451, and the lower end of the heating channel 420 is provided with a combustion air conveying shell 452. The combustion air conveying shell 452 is connected to a combustion air conveyor 454 through a combustion air conveying pipe 453.

[0033] The combustion air conveyor 454 is a commercially available product based on existing technology; like Figure 7 As shown, a waste heat recovery pipe 402 is spirally wound around the outer side of the pyrolysis conveying outer ring shell 41, and the upper end of the waste heat recovery pipe 402 is connected to the upper end of the heating exhaust pipe 451. like Figure 6 As shown, a heat-assisted pipe 320 is laid at the bottom of the vacuum dehydration sliding tank 32, and the heat-assisted pipe 320 is connected to the lower end of the waste heat recovery pipe 402.

[0034] like Figure 8As shown, a plurality of vertically extending pyrolysis product discharge shells 46 are fixed inside the core pyrolysis ring shell 42. The pyrolysis product discharge shells 46 are connected to the interior of the core pyrolysis ring shell 42 through a plurality of pyrolysis product flow holes 460. The upper end of the pyrolysis product discharge shells 46 is provided with a pyrolysis product discharge pipe 461 connected to its interior. In practical applications, the sludge generated from wastewater treatment is first crushed to break the agglomerated and flocculated sludge into small fragments. Using a conveying pump with existing technology, sludge is conveyed through sludge crushing input pipe 101 into sludge crushing container shell 11. The output shaft of the main stirring drive motor 122 is connected to the main stirring driven gear 123 and the main stirring driven gear 124 through meshing to drive the crushing main stirring shaft 12 to rotate. The crushing main stirring shaft 12 then drives multiple sludge crushing rods 120 to rotate together with it. The shearing action of the multiple sludge crushing rods 120 is used to crush the sludge. Simultaneously, the additional crushing mechanism 15 further crushes the sludge inside the sludge crushing container shell 11, making the sludge crushing more thorough. The crushing revolution rotating ring 13 is driven by a servo motor fixed on the inner wall of the sludge crushing container shell 11 through gear ring transmission to rotate around the vertical axis of the sludge crushing container shell 11. The rotation speed of the crushing revolution rotating ring 13 is 1 rpm. During the rotation of the crushing revolution rotating ring 13, the output shaft of the additional drive motor 154 drives the additional crushing shaft 151 to rotate through the meshing connection between the additional drive gear 155 and the additional driven gear 156. The additional crushing shaft 151 then drives multiple additional crushing blades 152 to rotate together, and the sludge is crushed by the shearing action of the multiple additional crushing blades 152. As the additional crushing blades 152 rotate with the additional crushing shaft 151, they also revolve around the axis of the crushing revolution ring 13, thereby enabling more comprehensive crushing treatment of the sludge in the sludge crushing container shell 11. The crushed sludge is discharged from the sludge crushing output pipe 102 and, under the conveying of the sludge crushing conveyor 103, enters the flexible pulsating dewatering pipe 23 through the squeeze dewatering input pipe 221. by Figure 4 For reference, the sludge flows from left to right in the flexible pulsating dewatering tube 23; The extrusion drive mechanisms 24 are numbered from left to right as JY1, JY2, JY3, JY4, JY5, JY6...JYn; In each set of extrusion drive mechanisms 24, the process of the two pulsating extrusion arc plates 243 approaching each other is called the "extrusion stroke", and the process of the two pulsating extrusion arc plates 243 moving away from each other is called the "reset stroke". The odd-numbered extrusion drive mechanisms 24 and the even-numbered extrusion drive mechanisms 24 alternately perform the "extrusion stroke" and "reset stroke" in sequence; During the "squeezing stroke", the inner rod of the pulsating extrusion drive rod 244 extends out and moves along the axis of the pulsating extrusion sliding cylinder 242 together with the pulsating extrusion arc plate 243 along the axis of the pulsating extrusion fixed cylinder 241, so that the pulsating extrusion arc plate 243 gradually approaches the flexible pulsating dehydration tube 23 and extrudes it. During the "reset stroke", the inner rod of the pulsating extrusion drive rod 244 retracts and moves the pulsating extrusion sliding cylinder 242 together with the pulsating extrusion arc plate 243 along the axis of the pulsating extrusion fixed cylinder 241, so that the pulsating extrusion arc plate 243 gradually moves away from the flexible pulsating dehydration tube 23. Under physical compression, the water in the sludge permeates through the side wall of the flexible pulsating dewatering pipe 23 and drips into the bottom of the dewatering mechanism receiving box 21. The sludge filtrate collected at the bottom of the dewatering mechanism receiving box 21 is finally discharged through the dewatering filtrate discharge pipe 201. After being squeezed and dewatered, the sludge is discharged from the squeezed dewatering output pipe 222 and enters the vacuum dewatering container 31 through the vacuum dewatering input pipe 311. The sludge entering the vacuum dewatering container 31 falls into the vacuum dewatering sliding trough 32 and gradually slides down the inclined surface of the vacuum dewatering sliding trough 32. Vacuuming is performed inside the vacuum dehydration container 31. Under vacuum conditions, the boiling point of water is significantly reduced, making it easier for the water in the sludge to evaporate and escape, further reducing the water content of the sludge. Vacuum pump 341 first evacuates the inside of vacuum tank 342 through vacuum suction pipe 344. After vacuum tank 342 reaches vacuum, vacuum pump 341 stops and closes suction control valve 3440. Then, vacuum control valve 3430 is opened to connect the inside of vacuum tank 342 with the inside of vacuum dehydration container 31. After the air pressure inside vacuum dehydration container 31 and vacuum tank 342 is balanced, vacuum control valve 3430 is closed. Then, suction control valve 3440 is opened again to evacuate the inside of vacuum tank 342 again. The above process is repeated to keep the inside of vacuum dehydration container 31 at a vacuum level of 0.09MPa. After vacuum dewatering, the sludge falls into the vacuum dewatering collection box 33. The sludge is then transported to the pyrolysis conveying outer ring shell 41 through the vacuum dewatering output pipe 332 and the pyrolysis initial input pipe 403 using the sludge discharge conveyor 331. The sludge flows from bottom to top inside the pyrolysis conveying outer ring shell 41 and then enters the core pyrolysis ring shell 42 through multiple sludge transfer connecting pipes 410. The sludge flows from top to bottom inside the core pyrolysis ring shell 42. Methane gas is fed into multiple heating gas supply pipes 43, while the combustion air supply machine 454 feeds air into the combustion air supply shell 452 through the combustion air supply pipe 453. The air then enters the heating channel 420 and flows from bottom to top. The methane gas in the heating gas supply pipes 43 is sprayed out from multiple combustion nozzles 431 and ignited. The air continuously provides oxygen to support the combustion process. The heat of the methane gas combustion is used to heat the sludge inside the core pyrolysis ring shell 42 to 550°C, and the sludge is pyrolyzed under high temperature. The core migration drive mechanism 44 assists the sludge to flow from top to bottom inside the core pyrolysis ring shell 42. The inner rods of multiple migration drive telescopic rods 444 extend and retract synchronously in a periodic manner, thereby driving the migration drive column 442 together with the migration drive ring plate 441 to move. During the movement from top to bottom, the migration drive ring plate 441 assists the sludge inside the core pyrolysis ring shell 42, making the sludge flow more smoothly from top to bottom inside the core pyrolysis ring shell 42. The light products generated from sludge pyrolysis will enter the pyrolysis product discharge shell 46 through the pyrolysis product flow passage 460. The light products in the pyrolysis product discharge shell 46 will finally be discharged through the pyrolysis product discharge pipe 461 and stored in a storage tank of the prior art. The biochar generated from sludge pyrolysis will flow from top to bottom inside the core pyrolysis ring shell 42 and finally be discharged from the pyrolysis slag discharge port 404. These biochars can be collected and stored in a unified manner. The exhaust gas produced by combustion will be discharged through the heated exhaust gas exhaust pipe 451 and the exhaust gas will be guided to the waste heat recovery pipe 402 so that the heat in the exhaust gas can be exchanged with the pyrolysis conveying outer ring shell 41, thereby preheating the sludge in the pyrolysis conveying outer ring shell 41. The exhaust gas still retains heat after preheating. The exhaust gas is then guided to the heat-assisted pipe 320, where the residual heat in the exhaust gas is used to exchange heat with the vacuum dehydration sliding tank 32 to heat the sludge in the vacuum dehydration sliding tank 32. Since the boiling point of water is greatly reduced under low pressure, even if the heating of the sludge is small, it can significantly accelerate the evaporation and escape of water in the sludge.

Claims

1. A low energy consumption municipal sludge dewatering and pyrolysis integrated device, characterized in that, The sludge breaking mechanism (10), the sludge pulsating dehydration mechanism (20), the sludge vacuum dehydration mechanism (30) and the sludge pyrolysis mechanism (40) are sequentially connected; The sludge breaking mechanism (10) comprises a sludge breaking accommodating cylinder shell (11) arranged in vertical extension along the axis, a breaking main stirring shaft (12) coaxially arranged in the sludge breaking accommodating cylinder shell (11) and rotatably connected to the sludge breaking accommodating cylinder shell (11), and a plurality of sludge breaking rods (120) fixed on the breaking main stirring shaft (12); The sludge pulsating dehydration mechanism (20) comprises a dehydration mechanism accommodating box (21), coaxially arranged extrusion dehydration input pipes (221) and extrusion dehydration output pipes (222) are respectively fixed on the left and right ends of the dehydration mechanism accommodating box (21), and a flexible pulsating dehydration pipe (23) is arranged between the extrusion dehydration input pipes (221) and the extrusion dehydration output pipes (222); A plurality of extrusion driving mechanisms (24) are arranged on the inner side wall of the dehydration mechanism accommodating box (21); The sludge vacuum dehydration mechanism (30) comprises a vacuum dehydration accommodating shell (31), a vacuum dehydration sliding groove (32) with an upward opening and an inclined arrangement is fixed in the vacuum dehydration accommodating shell (31), and a vacuum dehydration input pipe (311) is arranged above the higher end of the vacuum dehydration sliding groove (32); A vacuum dehydration collection box (33) with an upward opening is fixed below the lower end of the vacuum dehydration sliding groove (32) at the bottom of the vacuum dehydration accommodating shell (31), and a sludge discharge conveyor (331) is arranged in the vacuum dehydration collection box (33); The sludge pyrolysis mechanism (40) comprises a pyrolysis mechanism support bottom plate (401), an annular and internally hollow pyrolysis conveying outer ring shell (41) is fixed on the top of the pyrolysis mechanism support bottom plate (401) and extends vertically along the axis, and an annular and internally hollow core pyrolysis ring shell (42) coaxial with the pyrolysis conveying outer ring shell (41) is arranged on the inner side of the pyrolysis conveying outer ring shell (41); A heating channel (420) extending vertically is formed on the inner side of the core pyrolysis ring shell (42), a plurality of heating gas conveying pipes (43) extending vertically are arranged in the heating channel (420), and a plurality of combustion nozzles (431) are arranged on the outer side of the heating gas conveying pipes (43); The upper end of the pyrolysis conveying outer ring shell (41) is connected to the upper end of the core pyrolysis ring shell (42) through a plurality of sludge transfer communication pipes (410) arranged inside the pyrolysis conveying outer ring shell (41).

2. The low energy consumption integrated device for dewatering and pyrolysis of municipal sludge according to claim 1, characterized in that, A sludge breaking input pipe (101) connected to the inside of the sludge breaking accommodating cylinder shell (11) is arranged on the outer side of the sludge breaking accommodating cylinder shell (11) near the upper end, and a sludge breaking output pipe (102) connected to the inside of the sludge breaking accommodating cylinder shell (11) is arranged on the outer side of the sludge breaking accommodating cylinder shell (11) near the bottom; The sludge breaking output pipe (102) is connected to the extrusion dehydration input pipe (221), and a sludge breaking conveyor (103) is arranged on the sludge breaking output pipe (102); The extrusion dehydration output pipe (222) is connected to the vacuum dehydration input pipe (311); A dehydration filtrate discharge pipe (201) connected to the inside of the dehydration mechanism accommodating box (21) is fixed on the bottom of the dehydration mechanism accommodating box (21). The pyrolysis delivery outer ring shell (41) is provided with a pyrolysis initial input pipe (403) connected with the inside of the pyrolysis delivery outer ring shell (41) at the position close to the bottom outside the pyrolysis delivery outer ring shell (41), and the output end of the sludge delivery machine (331) is connected with the pyrolysis initial input pipe (403) through a vacuum dehydration output pipe (332); The core pyrolysis ring shell (42) is provided with a pyrolysis slag discharge port (404) connected with the inside of the core pyrolysis ring shell (42) at the lower end of the core pyrolysis ring shell (42).

3. The low energy consumption integrated device for dewatering and pyrolysis of municipal sludge according to claim 1, characterized in that, The sludge crushing containing cylinder shell (11) is rotatably connected with a crushing prograde rotation ring (13) coaxial with the sludge crushing containing cylinder shell (11) inside the sludge crushing containing cylinder shell (11), the sludge crushing support beam (14) extending along the radial direction of the crushing prograde rotation ring (13) is fixed to the inner side of the crushing prograde rotation ring (13), and the main stirring shaft connecting hole (141) vertically penetrating through the sludge crushing support beam (14) is arranged on the sludge crushing support beam (14). The main driving containing box (121) is fixed to the upper side of the sludge crushing support beam (14), the crushing main stirring shaft (12) extends to the main driving containing box (121), the main stirring driving motor (122) is fixed in the main driving containing box (121), the main stirring driving gear (123) is fixed to the output shaft of the main stirring driving motor (122), and the main stirring driven gear (124) is fixed to one end of the crushing main stirring shaft (12) extending to the main driving containing box (121).

4. The low energy consumption integrated device for dewatering and pyrolysis of municipal sludge according to claim 3, characterized in that, The sludge crushing support beam (14) is provided with an additional crushing mechanism (15), the additional crushing mechanism (15) comprises an additional crushing connecting hole (150) vertically penetrating through the sludge crushing support beam (14), and the additional crushing shaft (151) is rotatably connected in the additional crushing connecting hole (150). The additional driving containing box (153) is fixed to the upper side of the sludge crushing support beam (14), the additional crushing shaft (151) extends to the additional driving containing box (153), the additional driving motor (154) is fixed in the additional driving containing box (153), the additional driving gear (155) is fixed to the output shaft of the additional driving motor (154), and the additional driven gear (156) is fixed to one end of the additional crushing shaft (151) extending to the additional driving containing box (153).

5. The low energy consumption integrated device for dewatering and pyrolysis of municipal sludge according to claim 1, characterized in that, The extrusion driving mechanism (24) comprises two pulsation extrusion fixed cylinders (241) fixed to the opening opposite and coaxial arrangement of the inner side wall of the dehydration mechanism containing box (21), the pulsation extrusion sliding cylinder (242) is slidably connected in the pulsation extrusion fixed cylinder (241), and the pulsation extrusion arc-shaped plate (243) is fixed to the outer end of the pulsation extrusion sliding cylinder (242). The pulse extrusion fixed cylinder (241) is provided with a pulse extrusion driving rod (244) for driving the pulse extrusion sliding cylinder (242) to move; The extrusion driving mechanism (24) is arranged in the axial direction of the flexible pulse dewatering pipe (23) and is provided with a plurality of.

6. The low energy consumption integrated device for dewatering and pyrolysis of municipal sludge according to claim 1, characterized in that, The vacuum dewatering containing shell (31) is fixed with a vacuum driving containing box (34) outside, the vacuum driving containing box (34) is provided with a vacuum pump (341) and a plurality of vacuum tanks (342) inside, the vacuum tank (342) is communicated with the inside of the vacuum dewatering containing shell (31) through a vacuum communication pipe (343), and the vacuum communication pipe (343) is provided with a vacuum control valve (3430); The input end of the vacuum pump (341) is communicated with the inside of each vacuum tank (342) through a vacuum suction pipe (344), and the vacuum suction pipe (344) is provided with a suction control valve (3440).

7. The low energy consumption integrated device for dewatering and pyrolysis of municipal sludge according to claim 1, characterized in that, The core pyrolysis ring shell (42) is provided with a core migration driving mechanism (44) at the upper end, the core migration driving mechanism (44) includes a migration driving ring plate (441) which is connected in the vertical direction and slides in the inside of the core pyrolysis ring shell (42), a plurality of vertically extending migration driving columns (442) are fixed on the upper side of the migration driving ring plate (441), a plurality of vertically extending migration driving containing cylinder shells (443) are fixed at the top end of the core pyrolysis ring shell (42), the upper ends of the plurality of migration driving columns (442) extend into the inside of each migration driving containing cylinder shell (443) one by one, and the migration driving containing cylinder shell (443) is provided with a migration driving telescopic rod (444) for driving the migration driving column (442) to move.

8. The low energy consumption integrated device for dewatering and pyrolysis of municipal sludge according to claim 1, characterized in that, The heating channel (420) is provided with a heating tail gas exhaust pipe (451) at the upper end, and is provided with a combustion-supporting air conveying shell (452) at the lower end, the combustion-supporting air conveying shell (452) is connected with a combustion-supporting air conveying machine (454) through a combustion-supporting air conveying pipe (453).

9. The low energy consumption integrated device for dewatering and pyrolysis of municipal sludge according to claim 8, characterized in that, The pyrolysis conveying outer ring shell (41) is spirally extended and wound with a waste heat recovery pipeline (402) outside, and the waste heat recovery pipeline (402) is communicated with the upper end of the heating tail gas exhaust pipe (451); The vacuum dewatering sliding groove (32) is paved with a heat auxiliary pipeline (320) at the bottom, and the heat auxiliary pipeline (320) is communicated with the lower end of the waste heat recovery pipeline (402).

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