A low-heat-loss sludge drying and incineration integrated device

Abstract

This invention relates to the field of sludge treatment technology and provides an integrated device for low-heat-loss sludge drying and incineration. The device includes a frame, a drying unit, an incineration unit, a sludge conveying unit, a flue gas conveying unit, and a flue gas treatment unit. The flue gas conveying unit consists of an air intake mechanism and an inlet pipe. The air intake mechanism comprises a blower body, a drive assembly, a control assembly, a hollow main shaft, an annular frame, blower blades, and an adjustment assembly. The air intake mechanism can steplessly adjust the blower body's exhaust and suction air volume, output air pressure, and operating efficiency in real time. Based on real-time changes in the moisture content, feed amount, and organic matter content of the wet sludge, it can quickly adjust the blower body's exhaust and suction air volume, precisely control the heat supply of the annular flue gas heat exchange chamber, and precisely control the flue gas volume of the incineration unit. This stabilizes the optimal combustion condition of the incineration unit under a slightly positive pressure, completely solving the problems of positive pressure flue gas leakage or negative pressure cold air infiltration in the incineration unit, and reducing the fluctuation range of the combustion temperature in the incineration unit.

Description

Technical Field

[0001] This invention belongs to the field of sludge treatment technology, and particularly relates to an integrated device for low-heat-loss sludge drying and incineration. Background Technology

[0002] Integrated sludge drying and incineration technology has become the mainstream technology for sludge terminal disposal due to its advantages such as reducing sludge volume by more than 90%, completely killing pathogens, and recovering heat energy for resource reuse. It is widely used in sludge treatment systems in industries such as municipal wastewater, chemical, printing and dyeing, and papermaking. The core principle of this technology is to reduce the moisture content of sludge through a drying unit, and then completely incinerate the dried sludge through an incineration unit. At the same time, the waste heat from the high-temperature flue gas generated by incineration is recovered and used to feed back into the drying unit, realizing energy recycling and reducing system energy consumption and operating costs.

[0003] The existing equipment includes a sludge feeding system, a drum dryer, a rotary kiln incinerator, a waste heat boiler, an induced draft fan, a flue gas purification system, and a sludge conveying unit. Wet sludge enters the drum dryer via the feeding system. High-temperature flue gas from the incinerator enters the waste heat boiler, transferring heat to the heat exchange medium. The heat exchange medium indirectly heats and dries the sludge in the dryer through coils. The dried sludge is then conveyed into the incinerator for combustion. The flue gas generated during combustion is treated by the purification system before being discharged. The induced draft fan maintains a negative pressure environment inside the incinerator and regulates the flue gas flow rate through valve openings, achieving preliminary control of waste heat recovery and incineration conditions. However, the existing equipment still has certain technical shortcomings in practical applications. First, existing devices mostly use fixed-speed blowers or valves to regulate flue gas flow, which cannot achieve stepless and precise control. When the moisture content, feed amount or organic matter content of wet sludge fluctuates, it is difficult to quickly match the heat load requirements of the drying unit, resulting in unstable moisture content of the dried sludge, which cannot be stably maintained in the optimal range of self-sustaining combustion. Secondly, the existing incineration units mostly rely on a single induced draft fan to maintain a negative pressure environment. The negative pressure control accuracy is low, and problems such as positive pressure flue gas leakage or negative pressure cold air infiltration are prone to occur. This leads to large fluctuations in incineration temperature, affecting the efficiency of complete sludge incineration and decomposition of harmful substances, while also exacerbating system heat loss.

[0004] Therefore, in view of the above situation, there is an urgent need to develop an integrated sludge drying and incineration device with low heat loss to overcome the shortcomings in current practical applications. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an integrated device for low heat loss sludge drying and incineration to solve the problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A low-heat-loss sludge drying and incineration integrated device includes a frame, a drying unit, an incineration unit, a sludge conveying unit, a flue gas conveying unit, and a flue gas treatment unit. The drying unit consists of a support assembly, a drying cylinder, a rotating mechanism, and a heating cylinder. The support assembly, rotating mechanism, and heating cylinder are all mounted on the frame. The drying cylinder is rotatably positioned in the middle of the support assembly and is concentric with it. A heating cylinder is provided on the outer wall of the drying cylinder. The front and rear ends of the heating cylinder are respectively provided with an air inlet and an exhaust end. A fully enclosed annular flue gas heat exchange chamber is formed between the inner wall of the heating cylinder and the outer wall of the drying cylinder. The rotating mechanism is connected to the outer wall of the drying cylinder. The flue gas conveying unit consists of an air inlet mechanism and a flue gas inlet pipe. The air intake mechanism consists of a blower body, a drive assembly, a control assembly, a hollow main shaft, a ring frame, blower blades, and an adjustment assembly. The blower body is located on one side of the drying cylinder and fixed to the device frame. The exhaust pipe on the blower body is connected to the air intake end. The air intake hood on one side of the blower body is connected to the flue gas discharge pipe on the combustion unit through a smoke inlet pipe. The hollow main shaft is eccentrically mounted in the inner cavity of the blower body through a bearing seat. One end of the hollow main shaft is located on the outside of the blower body and is connected to the drive assembly. The other end of the main shaft is located inside the blower body and is coaxially fixed with the ring frame. A number of fan blades are equidistantly distributed on one side of the ring frame. One end of the control component is mounted on the device frame, and the other end of the control component passes through the hollow main shaft and extends into the interior of the blower body. The other end of the control component is connected to the drive end of the adjustment component. The drive end of the adjustment component is coaxially and slidably fitted on the outside of the hollow main shaft. The linkage end of the adjustment component is rotatably mounted on the ring frame and fixedly connected to the root of the fan blades.

[0007] As a further technical solution of the present invention, the adjustment assembly includes an adjustment block, a first ball bearing, an adjustment rod, a second ball bearing, an adjustment seat, and an adjustment shaft. The adjustment block is coaxially and slidably fitted onto the outside of the hollow main shaft and connected to one end of the control assembly. The first ball bearing is distributed circumferentially on the outer wall of the adjustment block. The adjustment shaft is rotatably mounted on a ring frame. One end of the adjustment shaft is fixed to an adjustment seat. One side of the adjustment seat is fixedly connected to the root of the fan blade. The second ball bearing is installed on the other side of the adjustment seat. The first ball bearing and the second ball bearing are connected as a whole by the adjustment rod.

[0008] As a further technical solution of the present invention, the adjustment shaft is perpendicular to the ring frame and parallel to the fan blades and the hollow main shaft respectively.

[0009] As a further technical solution of the present invention, the control component includes a control motor, a second pulley, a screw, a mounting bracket, a slider, a control rod, a connecting ring, and a control column. The control motor and the mounting bracket are both fixed on the device frame. The output end of the control motor is connected to the screw rotatably mounted on the mounting bracket via the second pulley. The screw is threadedly connected to the slider mounted on the device frame. The top of the slider is vertically fixed with a control rod. The top of the control rod is fixedly connected to a connecting ring rotatably mounted on one end of the control column. The control column is coaxially slidably mounted inside the hollow main shaft. The other end of the control column passes through the hollow main shaft and extends into the blower body. The other end of the control column is coaxially fixed with an adjusting block.

[0010] As a further technical solution of the present invention, the mounting bracket, screw and control column are all parallel to the hollow main shaft, the connecting ring adopts a circular ring structure composed of two U-shaped rings connected to each other, and the slider adopts a cross-shaped block structure.

[0011] As a further technical solution of the present invention, the drive assembly includes a drive motor and a pulley. The drive motor is fixed on the device frame, and the output end of the drive motor is connected to one end of the hollow main shaft through the pulley.

[0012] As a further technical solution of the present invention, the support assembly includes a support roller, a front sealing cylinder, a rear sealing cylinder, and scraper units. The support roller is rotatably mounted on the device frame. The front sealing cylinder and the rear sealing cylinder are coaxially fixed at the front and rear ends of the support roller, respectively. The top of the front sealing cylinder is provided with a feeding end, and the bottom of the rear sealing cylinder is provided with a discharging end. A drying cylinder is rotatably mounted between the front sealing cylinder and the rear sealing cylinder. Scraper units are axially and equidistantly distributed in the middle of the support roller. One end of each scraper unit is in contact with the inner wall of the drying cylinder. Adjacent scraper units are arranged in a staggered manner, and all scraper units are spirally arranged along the axial direction of the support roller.

[0013] As a further technical solution of the present invention, the scraper unit includes a fixed sleeve, a scraper rod, and a cleaning scraper. The fixed sleeve is axially and equidistantly fixed in the middle of the support roller. The scraper rod is radially fixed on the outer wall of the fixed sleeve. The cleaning scraper is fixed at the end of the scraper rod. One side of the cleaning scraper is in contact with the inner wall of the drying cylinder.

[0014] As a further technical solution of the present invention, the rotating mechanism includes a rotating motor, a rotating gear and a rotating gear ring. The rotating motor is fixed on the device frame and located at the bottom of the drying cylinder. A rotating gear is fixed on the output end of the rotating motor, and the rotating gear meshes with the rotating gear ring fixed on the outer wall of the drying cylinder.

[0015] As a further technical solution of the present invention, the inner wall of the heating cylinder is provided with spiral guide vanes along its axial direction, and the radial width of the spiral guide vanes is smaller than the radial width of the annular flue gas heat exchange cavity.

[0016] Compared with the prior art, the beneficial effects of the present invention are: By coordinating control and adjustment components, the exhaust and suction air volume, output air pressure, and operating efficiency of the blower can be adjusted steplessly in real time, achieving precise air volume control over a wide operating range. This allows for rapid adjustment of the blower's exhaust and suction air volume based on real-time changes in the moisture content, feed amount, and organic matter content of the wet sludge feed, thereby precisely controlling the heat supply of the annular flue gas heat exchange chamber and outputting semi-dry sludge with a stable moisture content. This ensures that the sludge self-sustaining combustion remains within the optimal range. Simultaneously, it can also precisely control the flue gas volume of the incineration unit, stably maintaining the optimal combustion condition of the incineration unit under slight positive pressure. This completely solves the problems of positive pressure flue gas leakage or negative pressure cold air infiltration in the incineration unit, reducing the fluctuation range of the combustion temperature in the incineration unit. Specifically, when the sludge moisture content increases or the calorific value decreases, the air volume is reduced to decrease the flue gas volume of the incineration unit, ensuring the stability of the core temperature of the incineration unit, while matching the drying heat load; when the sludge calorific value is too high, the air volume is increased to extract more waste heat for drying, avoiding overheating of the incineration unit. Under most operating conditions, no auxiliary fuel needs to be added, completely eliminating the extra heat consumption and operating costs of auxiliary fuel.

[0017] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a first-view structural schematic diagram of the integrated low-heat-loss sludge drying and incineration device provided in an embodiment of the present invention.

[0019] Figure 2 This is a second-view structural schematic diagram of the integrated low-heat-loss sludge drying and incineration device provided in an embodiment of the present invention.

[0020] Figure 3 This is a third-view structural schematic diagram of the integrated low-heat-loss sludge drying and incineration device provided in an embodiment of the present invention.

[0021] Figure 4 for Figure 3 Exploded view of the structure of the central support component, rotating mechanism and drying cylinder.

[0022] Figure 5 for Figure 2 Exploded view of the structure of the central heating cylinder.

[0023] Figure 6 for Figure 3 Enlarged view of the central air intake mechanism.

[0024] Figure 7 for Figure 2 Enlarged view of the central air intake mechanism.

[0025] Figure 8 for Figure 6 Enlarged view of the internal structure of the central air intake mechanism.

[0026] Figure 9 for Figure 7 Side view of the structure after the blower body is hidden.

[0027] Figure 10 for Figure 9 A structural side view of the central ring frame, fan blades, and adjustment components.

[0028] Figure 11 for Figure 9 A schematic diagram of the control component.

[0029] Figure 12 for Figure 9 A schematic diagram of the structure of the driving component.

[0030] Reference numerals: 100-device frame, 200-support assembly, 210-support roller, 220-front sealing cylinder, 230-rear sealing cylinder, 240-scraper unit, 241-fixed sleeve, 242-scraper bar, 243-cleaning scraper, 300-drying cylinder, 400-rotating mechanism, 410-rotary motor, 420-rotating gear, 430-rotating gear ring, 500-heating cylinder, 510-spiral guide vane, 520-air inlet end, 530-exhaust end, 600-air inlet mechanism, 610-blower body, 611-exhaust pipe, 612-air inlet hood, 620-drive Components: 621-Drive motor, 622-Pulley 1, 630-Control component, 631-Control motor, 632-Pulley 2, 633-Screw, 634-Mounting bracket, 635-Slider, 636-Control rod, 637-Connecting ring, 638-Control column, 640-Hollow main shaft, 650-Ring frame, 660-Fan blade, 670-Adjusting component, 671-Adjusting block, 672-Ball head bearing 1, 673-Adjusting rod, 674-Ball head bearing 2, 675-Adjusting seat, 676-Adjusting shaft, 700-Smoke inlet pipe, 800-Smoke outlet pipe. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0032] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0033] like Figures 1 to 12 As shown, an integrated low-heat-loss sludge drying and incineration device provided as an embodiment of the present invention includes a device frame 100, a drying unit, an incineration unit, a sludge conveying unit, a flue gas conveying unit, and a flue gas treatment unit. The drying unit, incineration unit, conveying unit, and flue gas treatment unit are all mounted on the device frame 100. The drying unit consists of a support assembly 200, a drying cylinder 300, a rotating mechanism 400, and a heating cylinder 500. The support assembly 200, rotating mechanism 400, and heating cylinder 500 are all mounted on the device frame 100. The front and rear ends of the support assembly 200 are respectively provided with a feed end and a discharge end. The discharge end is connected to the incineration unit through the sludge conveying unit. The drying cylinder 300 is rotatably arranged in the middle of the support assembly 200 and is concentric with it. A heating cylinder 500 is provided on the outer wall of the drying cylinder 300. The front and rear ends of the heating cylinder 500 are respectively provided with an air inlet 520 and an exhaust end 530. The air inlet 520 is connected to the flue gas conveying unit. The exhaust end 530 is connected to the flue gas treatment unit through the flue gas pipe 800. A fully enclosed annular flue gas heat exchange chamber is formed between the inner wall of the heating cylinder 500 and the outer wall of the drying cylinder 300. The rotating mechanism 400 is connected to the outer wall of the drying cylinder 300. The flue gas conveying unit consists of an air intake mechanism 600 and an air intake pipe 700. The air intake mechanism 600 comprises a blower body 610, a drive assembly 620, a control assembly 630, a hollow main shaft 640, a ring frame 650, blower blades 660, and an adjustment assembly 670. The blower body 610 is located on one side of the drying cylinder 300 and fixed to the device frame 100. The exhaust pipe 611 on the blower body 610 is connected to the air intake end 520. The air intake hood 612 on one side of the blower body 610 is connected to the flue gas discharge pipe on the incineration unit through the air intake pipe 700. The hollow main shaft 640 is eccentrically mounted in the inner cavity of the blower body 610 through a bearing seat, and its eccentricity matches the inner cavity size of the blower body 610. One side of the hollow main shaft 640... The hollow main shaft 640 is located on the outside of the blower body 610 and connected to the drive assembly 620. The other end of the hollow main shaft 640 is located inside the blower body 610 and is coaxially fixed to the ring frame 650. A number of fan blades 660 are equidistantly distributed on one side of the ring frame 650. One end of the control assembly 630 is mounted on the device frame 100. The other end of the control assembly 630 passes through the hollow main shaft 640 and extends into the interior of the blower body 610. The other end of the control assembly 630 is connected to the drive end of the adjustment assembly 670. The drive end of the adjustment assembly 670 is coaxially slidably fitted on the outside of the hollow main shaft 640. The linkage end of the adjustment assembly 670 is rotatably mounted on the ring frame 650 and fixedly connected to the root of the fan blades 660. The drive assembly 620 can drive the hollow main shaft 640 to rotate. The hollow main shaft 640 can drive the drive end of the annular frame 650 and the adjustment assembly 670 to rotate synchronously. The annular frame 650 and the adjustment assembly 670 can cooperate to drive the fan blades 660 to make eccentric rotation in the inner cavity of the blower body 610, thereby forming a stable negative pressure suction in the blower body 610. This suction can draw the high-temperature flue gas discharged from the incineration unit into the blower body 610 through the flue gas inlet pipe 700 and the air inlet hood 612 in sequence, and then guide it to the annular flue gas heat exchange chamber through the exhaust pipe 611 and the air inlet end 520, so as to realize the in-situ cascade utilization of the waste heat of the incineration flue gas and uniformly heat and dry the wet sludge in the drying cylinder 300. The control component 630 can drive the drive end of the adjustment component 670 in real time, making it linearly displaced along the hollow main shaft 640. The drive end of the adjustment component 670 can drive the fan blades 660 to deflect on the annular frame 650 through its linkage end, thereby synchronously changing the tilt angle of all fan blades 660. In this way, the exhaust and suction air volume, output air pressure and operating efficiency of the blower body 610 can be adjusted steplessly in real time without stopping the machine and without changing the speed of the drive component 620, so as to achieve precise air volume control within a wide operating range, perfectly adapt to the real-time fluctuation of flue gas emissions from the incineration unit and heat load from the drying unit, and can independently and stably control the pressure field of the incineration furnace and the annular flue gas heat exchange chamber. By coordinating the control component 630 and the adjustment component 670, the exhaust and suction volume of the blower body 610 can be quickly adjusted according to the real-time changes in the moisture content, feed amount and organic matter content of the wet sludge feed. This allows for precise control of the heat supply of the annular flue gas heat exchange chamber, outputting semi-dry sludge with a stable moisture content. This ensures that the sludge self-sustaining combustion is always in the optimal range. At the same time, it can also precisely control the flue gas volume of the incineration unit, stably maintain the optimal combustion condition of the incineration unit under slight positive pressure, completely solve the problem of positive pressure flue gas leakage or negative pressure cold air infiltration in the incineration unit, and reduce the fluctuation range of the combustion temperature of the incineration unit. Specifically, when the sludge moisture content increases or the calorific value decreases, the air volume is reduced to decrease the flue gas volume of the incineration unit, ensuring the stability of the core temperature of the incineration unit, while matching the drying heat load; when the sludge calorific value is too high, the air volume is increased to extract more waste heat for drying, avoiding overheating of the incineration unit. Under most operating conditions, no auxiliary fuel needs to be added, completely eliminating the extra heat consumption and operating costs of auxiliary fuel.

[0034] like Figures 6 to 10 As shown, in a preferred embodiment of the present invention, the adjustment assembly 670 includes an adjustment block 671, a first ball bearing 672, an adjustment rod 673, a second ball bearing 674, an adjustment seat 675, and an adjustment shaft 676. The adjustment block 671 is coaxially slidably fitted onto the outside of the hollow main shaft 640 and connected to one end of the control assembly 630. The first ball bearing 672 is circumferentially distributed on the outer wall of the adjustment block 671. The adjustment shaft 676 is rotatably mounted on the annular frame 650. One end of the adjustment shaft 676 is fixed to the adjustment seat 675. One side of the adjustment seat 675 is fixedly connected to the root of the fan blade 660. The second ball bearing 674 is installed on the other side of the adjustment seat 675. The first ball bearing 672 and the second ball bearing 674 are connected as a whole by the adjustment rod 673.

[0035] The adjustment shaft 676 is perpendicular to the annular frame 650 and parallel to the fan blade 660 and the hollow main shaft 640, respectively.

[0036] When the hollow main shaft 640 rotates, it can drive the adjusting block 671 and the annular frame 650 to rotate synchronously. The adjusting block 671, in cooperation with the annular frame 650, can drive multiple adjusting seats 675 to rotate synchronously. The multiple adjusting seats 675 drive multiple fan blades 660 to rotate synchronously, so that all fan blades 660 can make eccentric rotational motion in the inner cavity of the blower body 610, thereby forming a stable negative pressure suction force in the blower body 610. This suction force can draw the high-temperature flue gas discharged from the incineration unit into the blower body 610 through the flue gas inlet pipe 700 and the air inlet hood 612 in sequence, and then guide it to the annular flue gas heat exchange chamber through the exhaust pipe 611 and the air inlet end 520, so as to realize the in-situ cascade utilization of the waste heat of the incineration flue gas and uniformly heat and dry the wet sludge in the drying cylinder 300. The control component 630 can drive the adjusting block 671 to make linear displacement along the axial direction of the hollow main shaft 640 in real time. The adjusting block 671, through the ball bearing 672, the adjusting rod 673 and the ball bearing 674, can drive the adjusting seat 675 and the adjusting shaft 676 to deflect on the annular frame 650. The adjusting seat 675 drives the fan blades 660 on it to deflect, thereby synchronously changing the tilt angle of all fan blades 660. In this way, the exhaust and suction air volume, output air pressure and operating efficiency of the blower body 610 can be adjusted steplessly in real time without stopping the machine and without changing the speed of the drive component 620. It can achieve precise air volume control within a wide operating range, perfectly adapt to the real-time fluctuation of flue gas emissions from the incineration unit and heat load from the drying unit, and can independently and stably control the pressure field of the incineration furnace and the annular flue gas heat exchange chamber.

[0037] like Figures 6 to 11As shown, in a preferred embodiment of the present invention, the control component 630 includes a control motor 631, a second pulley 632, a screw 633, a mounting bracket 634, a slider 635, a control rod 636, a connecting ring 637, and a control column 638. The control motor 631 and the mounting bracket 634 are both fixed to the device frame 100. The output end of the control motor 631 is connected to the screw 633, which is rotatably mounted on the mounting bracket 634, via the second pulley 632. The screw 633 is threadedly connected to the slider 635, which is mounted on the device frame 100. The top of the slider 635 is vertically fixed with the control rod 636. The top of rod 636 is fixedly connected to a connecting ring 637 rotatably mounted on one end of control column 638. Control column 638 is coaxially slidably mounted inside hollow main shaft 640. The other end of control column 638 passes through hollow main shaft 640 and extends into blower body 610. The other end of control column 638 is coaxially fixed with adjusting block 671. Mounting bracket 634, screw 633 and control column 638 are all parallel to hollow main shaft 640. Connecting ring 637 is preferably a ring structure composed of two U-shaped rings connected to each other. Slider 635 is preferably a cross-shaped block structure.

[0038] When it is necessary to quickly adjust the exhaust and suction volume of the blower body 610 according to the real-time changes in the moisture content, feed amount, and organic matter content of the wet sludge feed, or when it is necessary to precisely control the flue gas volume of the incineration unit, the control motor 631 can drive the screw 633 to rotate forward and backward via the pulley 632. The screw 633, through forward and reverse rotation and in cooperation with the mounting bracket 634, can drive the slider 635 to reciprocate linearly on the mounting bracket 634. The slider 635 drives the connecting ring 637 to move via the control rod 636, and the connecting ring 637 drives the control column. 638 moves axially inside the hollow main shaft 640. The control column 638 drives the adjustment block 671 to make linear displacement along the axial direction of the hollow main shaft 640, thereby synchronously changing the tilt angle of all fan blades 660, accurately controlling the heat supply of the annular flue gas heat exchange chamber, and outputting semi-dry sludge with stable moisture content. This ensures that the sludge self-sustaining combustion is always in the optimal range, while also stably maintaining the optimal combustion condition of the incineration unit under micro-positive pressure. This completely solves the problem of positive pressure flue gas leakage or negative pressure cold air infiltration in the incineration unit, and reduces the fluctuation range of the combustion temperature of the incineration unit. Furthermore, when the hollow main shaft 640 rotates, it can drive the control column 638 to rotate synchronously. Due to the rotational connection between the control column 638 and the connecting ring 637, the control column 638 will not drive the connecting ring 637 to rotate synchronously during rotation, effectively avoiding motion interference between the control column 638 and the control rod 636. In this way, the exhaust and suction air volume, output air pressure and operating efficiency of the blower body 610 can be adjusted steplessly in real time without stopping the machine or changing the speed of the drive component 620, realizing precise air volume control within a wide operating range, perfectly adapting to the real-time fluctuations of the flue gas emission of the incineration unit and the heat load of the drying unit, while independently and stably controlling the pressure field of the incineration furnace and the annular flue gas heat exchange chamber.

[0039] like Figures 6 to 12 As shown, in a preferred embodiment of the present invention, the drive assembly 620 includes a drive motor 621 and a pulley 622. The drive motor 621 is fixed on the device frame 100, and the output end of the drive motor 621 is connected to one end of the hollow main shaft 640 through the pulley 622.

[0040] The drive motor 621 drives the pulley 622 to rotate, which in turn drives the hollow main shaft 640 to rotate. The hollow main shaft 640 can drive the drive end of the annular frame 650 and the adjustment component 670 to rotate synchronously. The annular frame 650 and the adjustment component 670 cooperate to drive the fan blades 660 to make an eccentric rotational motion in the inner cavity of the blower body 610, thereby forming a stable negative pressure suction force in the blower body 610. This suction force can draw the high-temperature flue gas discharged from the incineration unit into the blower body 610 through the flue gas inlet pipe 700 and the air inlet hood 612, and then guide it to the annular flue gas heat exchange chamber through the exhaust pipe 611 and the air inlet end 520, realizing the in-situ cascade utilization of the waste heat of the incineration flue gas and uniformly heating and drying the wet sludge in the drying cylinder 300.

[0041] In a preferred embodiment, both the drive motor 621 and the control motor 631 are preferably servo variable speed motors, and both the pulley 622 and the pulley 632 are preferably belt drive structures consisting of two pulleys and a belt.

[0042] like Figures 1 to 4As shown, in a preferred embodiment of the present invention, the support assembly 200 includes a support roller 210, a front sealing cylinder 220, a rear sealing cylinder 230, and scraper units 240. The support roller 210 is rotatably mounted on the device frame 100. The front sealing cylinder 220 and the rear sealing cylinder 230 are coaxially fixed at the front and rear ends of the support roller 210, respectively. The top of the front sealing cylinder 220 is provided with a feeding end, and the bottom of the rear sealing cylinder 230 is provided with a discharging end. A drying cylinder 300 is rotatably mounted between the front sealing cylinder 220 and the rear sealing cylinder 230. Scraper units 240 are axially equidistantly distributed in the middle of the support roller 210. One end of the scraper unit 240 is in contact with the inner wall of the drying cylinder 300. Adjacent scraper units 240 are arranged in a staggered manner, and the scraper units 240 are all spirally arranged along the axial direction of the support roller 210 to form a continuous spiral scraping and guiding structure.

[0043] The scraper unit 240 includes a fixing sleeve 241, a scraper rod 242, and a cleaning scraper 243. The fixing sleeve 241 is axially and equidistantly fixed in the middle of the support roller 210. The scraper rod 242 is radially fixed on the outer wall of the fixing sleeve 241. The cleaning scraper 243 is fixed at the end of the scraper rod 242. One side of the cleaning scraper 243 is in contact with the inner wall of the drying cylinder 300.

[0044] When the rotating mechanism 400 drives the drying cylinder 300 to rotate, the relative movement between the drying cylinder 300 and the scraper unit 240 allows the scraper unit 240 to not only thoroughly scrape off the sludge adhering to the inner wall of the drying cylinder 300, preventing the sludge from crusting or sticking to the wall and reducing the thermal resistance caused by scaling, thus improving the heat exchange efficiency of the drying cylinder 300 and eliminating the problem of insufficient drying in certain areas; it can also push the sludge smoothly forward along the axial direction of the drying cylinder 300 through the spirally arranged cleaning scraper 243, while continuously turning and breaking up the sludge, allowing the wet sludge to fully contact the inner wall of the drying cylinder 300 and the hot air in the drying chamber, greatly improving the uniformity of drying, avoiding the formation of sludge clumps that are dry on the outside and wet on the inside, and laying the foundation for efficient combustion in the subsequent incineration unit.

[0045] In a preferred embodiment, the inner walls of the front sealing cylinder 220 and the rear sealing cylinder 230 are rotatably sealed to the front and rear ends of the drying cylinder 300 through high-temperature resistant rotary seals, thereby forming a fully enclosed drying chamber sealing structure to prevent heat leakage and odor overflow during the drying process.

[0046] like Figures 1 to 4As shown, in a preferred embodiment of the present invention, the rotating mechanism 400 includes a rotating motor 410, a rotating gear 420, and a rotating gear ring 430. The rotating motor 410 is fixed on the device frame 100 and located at the bottom of the drying cylinder 300. The rotating gear 420 is fixed on the output end of the rotating motor 410, and the rotating gear 420 meshes with the rotating gear ring 430 fixed on the outer wall of the drying cylinder 300.

[0047] The rotary motor 410 drives the rotary gear 420 to rotate. The rotary gear 420, through meshing with the rotary gear ring 430, precisely drives the drying cylinder 300 to rotate uniformly around its own axis. During rotation, the inner wall of the drying cylinder 300 and the scraper unit 240 fixed on the support roller 210 generate stable relative motion. This allows the scraper unit 240 to thoroughly scrape away the sludge adhering to the inner wall of the drying cylinder 300, preventing sludge crusting or adhesion that reduces heat conduction efficiency and minimizes thermal resistance caused by scaling. This ensures that the high-temperature heat from the outer wall of the drying cylinder 300 is efficiently transferred to the inner sludge, significantly improving the drying cylinder 300's efficiency. The heat exchange efficiency is improved, eliminating problems such as insufficient drying in certain areas and sludge sticking to the walls and clogging. Furthermore, the spirally arranged scraper units 240 smoothly propel the sludge along the axial direction of the drying cylinder 300 towards the discharge end during relative motion. Simultaneously, the sludge is continuously turned and dispersed, breaking up sludge agglomerations. This ensures that each particle of wet sludge can fully contact the inner wall of the drying cylinder 300 and the high-temperature hot air within the drying chamber, significantly improving drying uniformity and completely preventing sludge clumping that results in sludge that is dry on the outside but wet on the inside. This ensures that the moisture content of the dried sludge is uniformly and stably within a suitable self-sustaining combustion range, laying a solid foundation for the efficient and complete combustion of the subsequent incineration unit.

[0048] like Figures 1 to 5 As shown in the preferred embodiment of the present invention, the inner wall of the heating cylinder 500 is provided with spiral guide vanes 510 along its axial direction. The radial width of the spiral guide vanes 510 is slightly smaller than the radial width of the annular flue gas heat exchange cavity. This allows the high-temperature flue gas discharged from the combustion unit to be transported to the annular flue gas heat exchange cavity by the air inlet mechanism 600. Instead of passing directly and quickly along the axial direction, the flue gas can only flow slowly and evenly along the axial direction of the inner wall of the heating cylinder 500 through the continuous spiral channel formed by the spiral guide vanes 510. This achieves full contact and efficient heat exchange between the high-temperature flue gas and the outer wall of the drying cylinder 300, extends the flue gas heat exchange path, maximizes the utilization of flue gas waste heat, reduces exhaust heat loss, and at the same time, avoids flue gas deflection, achieving uniform heating of the entire wall surface of the drying cylinder 300 and improving drying uniformity.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-heat-loss sludge drying and incineration integrated device, comprising a frame, a drying unit, an incineration unit, a sludge conveying unit, a flue gas conveying unit, and a flue gas treatment unit, wherein the drying unit consists of a support assembly, a drying cylinder, a rotating mechanism, and a heating cylinder, wherein the support assembly, the rotating mechanism, and the heating cylinder are all mounted on the frame, the drying cylinder is rotatably disposed in the middle of the support assembly and concentric with it, the heating cylinder is disposed on the outer wall of the drying cylinder, the heating cylinder has an air inlet end and an exhaust end at its front and rear ends respectively, the inner wall of the heating cylinder and the outer wall of the drying cylinder form a fully enclosed annular flue gas heat exchange chamber, and the rotating mechanism is connected to the outer wall of the drying cylinder, characterized in that, The flue gas conveying unit consists of an air intake mechanism and a flue gas inlet pipe; The air intake mechanism consists of a blower body, a drive assembly, a control assembly, a hollow main shaft, a ring frame, blower blades, and an adjustment assembly. The blower body is located on one side of the drying cylinder and fixed to the device frame. The exhaust pipe on the blower body is connected to the air intake end. The air intake hood on one side of the blower body is connected to the flue gas discharge pipe on the combustion unit through a smoke inlet pipe. The hollow main shaft is eccentrically mounted in the inner cavity of the blower body through a bearing seat. One end of the hollow main shaft is located on the outside of the blower body and is connected to the drive assembly. The other end of the main shaft is located inside the blower body and is coaxially fixed with the ring frame. A number of fan blades are equidistantly distributed on one side of the ring frame. One end of the control component is mounted on the device frame, and the other end of the control component passes through the hollow main shaft and extends into the interior of the blower body. The other end of the control component is connected to the drive end of the adjustment component. The drive end of the adjustment component is coaxially and slidably fitted on the outside of the hollow main shaft. The linkage end of the adjustment component is rotatably mounted on the ring frame and fixedly connected to the root of the fan blades.

2. The integrated low-heat-loss sludge drying and incineration device according to claim 1, characterized in that, The adjustment assembly includes an adjustment block, a first ball bearing, an adjustment rod, a second ball bearing, an adjustment seat, and an adjustment shaft. The adjustment block is coaxially slidably fitted onto the outside of the hollow main shaft and connected to one end of the control assembly. The first ball bearing is circumferentially distributed on the outer wall of the adjustment block. The adjustment shaft is rotatably mounted on a ring frame. One end of the adjustment shaft is fixed to an adjustment seat. One side of the adjustment seat is fixedly connected to the root of the fan blade. The second ball bearing is installed on the other side of the adjustment seat. The first ball bearing and the second ball bearing are connected as a whole by the adjustment rod.

3. The integrated low-heat-loss sludge drying and incineration device according to claim 2, characterized in that, The adjustment shaft is perpendicular to the ring frame and parallel to both the fan blades and the hollow main shaft.

4. The integrated low-heat-loss sludge drying and incineration device according to claim 2, characterized in that, The control assembly includes a control motor, a second pulley, a screw, a mounting bracket, a slider, a control rod, a connecting ring, and a control column. The control motor and the mounting bracket are both fixed on the device frame. The output end of the control motor is connected to the screw, which is rotatably mounted on the mounting bracket, via the second pulley. The screw is threadedly connected to the slider, which is mounted on the device frame. The top of the slider is vertically fixed to the control rod. The top of the control rod is fixedly connected to the connecting ring, which is rotatably mounted on one end of the control column. The control column is coaxially slidably mounted inside the hollow main shaft. The other end of the control column passes through the hollow main shaft and extends into the blower body, and is coaxially fixed to the adjusting block.

5. The integrated low-heat-loss sludge drying and incineration device according to claim 4, characterized in that, The mounting bracket, screw, and control column are all parallel to the hollow main shaft. The connecting ring adopts a circular ring structure composed of two U-shaped rings connected to each other, and the slider adopts a cross-shaped block structure.

6. The integrated low-heat-loss sludge drying and incineration device according to claim 1, characterized in that, The drive assembly includes a drive motor and a pulley. The drive motor is fixed on the device frame, and the output end of the drive motor is connected to one end of the hollow main shaft through the pulley.

7. The integrated low-heat-loss sludge drying and incineration device according to claim 1, characterized in that, The support assembly includes a support roller, a front sealing cylinder, a rear sealing cylinder, and scraper units. The support roller is rotatably mounted on the device frame. The front and rear sealing cylinders are coaxially fixed at the front and rear ends of the support roller, respectively. The top of the front sealing cylinder is provided with a feeding end, and the bottom of the rear sealing cylinder is provided with a discharging end. A drying cylinder is rotatably mounted between the front and rear sealing cylinders. Scraper units are axially and equidistantly distributed in the middle of the support roller. One end of each scraper unit is in contact with the inner wall of the drying cylinder. Adjacent scraper units are arranged in a staggered manner, and all scraper units are spirally arranged along the axial direction of the support roller.

8. The integrated low-heat-loss sludge drying and incineration device according to claim 7, characterized in that, The scraper unit includes a fixed sleeve, a scraper rod, and a cleaning scraper. The fixed sleeve is axially and equidistantly fixed in the middle of the support roller. The scraper rod is radially fixed on the outer wall of the fixed sleeve. The cleaning scraper is fixed at the end of the scraper rod. One side of the cleaning scraper is in contact with the inner wall of the drying cylinder.

9. The integrated low-heat-loss sludge drying and incineration device according to claim 1, characterized in that, The rotating mechanism includes a rotating motor, a rotating gear, and a rotating gear ring. The rotating motor is fixed on the device frame and located at the bottom of the drying cylinder. A rotating gear is fixed on the output end of the rotating motor, and the rotating gear meshes with the rotating gear ring fixed on the outer wall of the drying cylinder.

10. The integrated low-heat-loss sludge drying and incineration device according to claim 1, characterized in that, The inner wall of the heating cylinder is provided with spiral guide vanes along its axial direction, and the radial width of the spiral guide vanes is smaller than the radial width of the annular flue gas heat exchange cavity.

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