Vacuum sludge waste heat drying device, system and method

Abstract

The application discloses a vacuum sludge waste heat drying device, system and method, belongs to the technical field of sludge drying, and a plurality of hollow discs are coaxially arranged on a driving shaft, a plurality of partition plates are arranged on the periphery of the hollow discs, a fixed shaft is arranged between adjacent partition plates, a fixed plate is fixedly arranged on the fixed shaft in an inclined manner and a rotating plate is rotatably arranged on the fixed shaft, when the driving shaft rotates in a first direction, the fixed plate and the rotating plate are in the same plane, when the driving shaft rotates in a second direction, the fixed plate and the rotating plate are mirror images arranged opposite the partition plates, and a counterweight for plugging the gap between adjacent partition plates is arranged on the side of the rotating plate. The vacuum sludge waste heat drying device has the unique functions of forward and reverse rotation, and the performance is improved in multiple aspects. The forward and reverse rotation control of the driving shaft drives the plurality of hollow discs coaxially arranged with the driving shaft to synchronously rotate, and then the fixed plate and the rotating plate fixed on the periphery of the hollow disc present different working states.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sludge drying, and in particular to a vacuum sludge waste heat drying device, system and method. BACKGROUND

[0002] Vacuum sludge drying is a technology that uses a negative pressure environment to realize sludge dewatering and volume reduction, and is widely used in sludge disposal generated in municipal sewage treatment, industrial wastewater treatment and other fields. Its core principle is to establish a vacuum state in a sealed container, reduce the boiling point of water, and make the water in the sludge evaporate quickly at a lower temperature, and recover the water vapor through condensation, thereby significantly reducing the moisture content of the sludge and realizing sludge reduction and stabilization.

[0003] In the process of sludge drying, there is a common problem of insufficient sludge turning, which makes the sludge prone to form local accumulation in the device and cannot fully contact with the heating source, thereby causing uneven drying, with some areas being over-dried and other areas being under-dried, which seriously affects the drying quality. At the same time, the sludge conveying efficiency is low, and the residence time in the device is greatly different, which not only prolongs the overall drying period and reduces the processing efficiency, but also may cause the sludge to be hardened due to long-term residence in some areas, further hindering the subsequent drying process, increasing the difficulty of equipment maintenance, and being difficult to meet the actual needs of efficient and uniform drying. SUMMARY

[0004] The purpose of the application is to provide a vacuum sludge waste heat drying device, system and method to solve the above problems existing in the prior art.

[0005] Technical solution: A vacuum sludge waste heat drying device, the drying device comprises: a shell, a drive shaft is rotatably arranged in the shell, a plurality of hollow discs are coaxially arranged on the drive shaft, a plurality of partition plates are circumferentially arranged at the edge of the hollow disc, a fixed shaft is arranged between adjacent partition plates, a fixed plate is fixedly arranged on the fixed shaft and a rotating plate is rotatably arranged on the fixed shaft, when the drive shaft rotates in a first direction, the fixed plate and the rotating plate are in the same plane, when the drive shaft rotates in a second direction, the fixed plate and the rotating plate are mirror images arranged relative to the partition plate, a counterweight is arranged on the side surface of the rotating plate for plugging the gap between adjacent partition plates.

[0006] Further, the counterweight is triangular.

[0007] Further, the plugging surface of the counterweight is convex.

[0008] Further, the counterweight further comprises a driving surface for driving the counterweight from a plugging state to an open state.

[0009] Further, a plurality of material plates recessed toward the center of the circle are obliquely arranged on the side surface of the hollow disc.

[0010] Furthermore, a plurality of the material plates are arranged along the radial circumference of the hollow disc.

[0011] Furthermore, the driving shaft is a hollow shaft, and a liquid inlet cavity and a liquid discharge cavity are provided in the driving shaft. The liquid inlet cavity is connected to the liquid inlet of the hollow disc, and the liquid discharge cavity is connected to the hollow disc.

[0012] Furthermore, the channels in the hollow disc are arranged in two fan shapes.

[0013] Furthermore, a feed cavity and a discharge cavity are provided on the shell.

[0014] Furthermore, a dust collector is provided on the shell.

[0015] Furthermore, a heating chamber is provided inside the shell wall.

[0016] Furthermore, it also includes a driving mechanism for driving the driving shaft to rotate.

[0017] A vacuum waste heat sludge drying system comprises the vacuum sludge waste heat drying device described in any one of the above items, wherein the dust collector of the drying device is connected to the condenser through a pipeline, and the condenser is connected to the vacuum pump through a pipeline.

[0018] Furthermore, it also includes a liquid inlet pipeline, which is connected to the liquid inlet chamber and the heating chamber, and the liquid discharge chamber and the heating chamber are connected to the liquid discharge pipeline, and the liquid inlet pipeline and the liquid discharge pipeline are connected through a heater.

[0019] Furthermore, a liquid replenishing pipeline is provided on the liquid inlet pipeline.

[0020] A vacuum sludge waste heat drying method, the specific steps are:

[0021] Step 1: Feed the sludge to be dried into the shell through the feed chamber, and start the vacuum pump to maintain a vacuum state in the shell;

[0022] Step 2: Control the driving mechanism to drive the driving shaft to rotate in a first direction so that the fixed plate and the rotating plate on the edge of the hollow disc are in the same plane, forming a sludge conveying channel, and the material plate is used to squeeze the sludge into the sludge conveying channel;

[0023] Step 3: A heating medium is introduced into the liquid inlet cavity of the drive shaft. The heating medium flows through the hollow disc and is discharged from the liquid discharge cavity. At the same time, a heating medium is introduced into the heating cavity in the shell wall to heat and dry the sludge using the residual heat.

[0024] Step 4: During the drying process, the drive shaft is controlled to rotate in the second direction so that the fixed plate and the rotating plate are mirror-imaged relative to the partition plate. The counterweights on the side of the rotating plate seal the gaps between adjacent partition plates. At the same time, the material plate is used to turn the sludge. The generated steam and exhaust gas are discharged from the gaps between the adjacent partition plates opened at the top and enter the condenser through the dust collector for condensation.

[0025] Step 5: After drying is completed, the driving shaft is controlled to rotate in the first direction, and the dried sludge is transported to the discharge chamber through the gaps between the material plates on the side of the hollow disc and the adjacent partition plates for discharge.

[0026] Beneficial effects:

[0027] The vacuum sludge waste heat drying device in this application achieves multiple performance improvements through its unique forward and reverse rotation function. The forward and reverse rotation of the drive shaft drives the synchronous operation of multiple hollow discs arranged coaxially with it, thereby causing the fixed plates and rotating plates fixed to the edges of the hollow discs to exhibit different working states.

[0028] When the drive shaft of the present invention rotates in the first direction, the fixed plate and the rotating plate are in the same plane, and the two work together to form a smooth inclined conveying channel. During this process, as the hollow disc rotates, centrifugal force and the tilt angle are used to quickly and efficiently push the sludge in a specific direction, greatly improving the sludge conveying efficiency within the device, reducing the conveying time, gaining more time for the subsequent drying process, and improving the overall drying efficiency.

[0029] When the driving shaft of the present application rotates in the second direction, the fixed plate and the rotating plate are mirror-imaged relative to the partition plate. At this time, the counterweights on the side of the rotating plate block the gaps between adjacent partition plates to prevent sludge from leaking into adjacent cavities. At the same time, the fixed plate and the rotating plate cooperate with the material plate to forcefully flip the sludge. The material plate is inclined and concave toward the center of the circle, which holds the sludge and lifts it upward and throws it down when the disc rotates in the opposite direction. This flipping method greatly increases the contact area between the sludge and the heating components (such as the hollow disc and the heating cavity in the shell wall), allowing the moisture inside the sludge to quickly diffuse to the surface and evaporate, effectively avoiding the accumulation and scaling of sludge on the disc surface, ensuring the stability of the heating efficiency, improving the drying uniformity, and ensuring that the quality of the dried sludge is more stable and the moisture content is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the vacuum waste heat sludge drying device of the present invention;

[0031] Figure 2 This is a diagram showing the posture of the rotating plate of the hollow disc of the present invention when it moves in the first direction;

[0032] Figure 3 This is a posture diagram of a plurality of adjacent rotating plates when the hollow disk of the present invention moves in the first direction;

[0033] Figure 4 This is a diagram showing the posture of the rotating plate of the hollow disc of the present invention when it moves in the second direction;

[0034] Figure 5 This is a posture diagram of a plurality of adjacent rotating plates when the hollow disk of the present invention moves in the second direction;

[0035] Figure 6 This is a schematic diagram of the material state when the hollow disc of the present invention moves in the first direction;

[0036] Figure 7 This is a schematic diagram of the material state when the hollow disc of the present invention moves in the second direction;

[0037] Figure 8 This is a schematic diagram of the positions of the fixed plate and the rotating plate of the present invention;

[0038] Figure 9 It is a system diagram of the present invention.

[0039] The figures are marked as follows: drying device 100, shell 101, drive shaft 102, hollow disc 103, partition plate 104, fixed shaft 105, fixed plate 106, rotating plate 107, counterweight 108, material plate 109, liquid inlet chamber 110, liquid discharge chamber 111, feed chamber 112, discharge chamber 113, dust collector 114, heating chamber 115, drive mechanism 116, condenser 200, vacuum pump 300, liquid inlet pipeline 400, liquid discharge pipeline 500, heater 600, and liquid replenishing pipeline 700. DETAILED DESCRIPTION

[0040] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without one or more of these details. In other instances, certain technical features well known in the art are not described to avoid confusion with the present invention.

[0041] like Figures 1 to 9As shown, a vacuum sludge waste heat drying device 100 includes a housing 101, a drive shaft 102 rotatably mounted within the housing 101, a plurality of hollow discs 103 coaxially mounted on the drive shaft 102, a plurality of partition plates 104 circumferentially disposed around the edges of the hollow discs 103, a fixed shaft 105 disposed between adjacent partition plates 104, a fixed plate 106 obliquely fixedly mounted on the fixed shaft 105, and a rotating plate 107 rotatably mounted thereon. When the drive shaft 102 rotates in a first direction, the fixed plate 106 and the rotating plate 107 are coplanar. When the drive shaft 102 rotates in a second direction, the fixed plate 106 and the rotating plate 107 are mirror images relative to the partition plates 104. A counterweight 108 is disposed on the side of the rotating plate 107 to seal the gaps between adjacent partition plates 104. The counterweight 108 is triangular in shape, and its sealing surface is convex. The counterweight block 108 also includes a driving surface for driving the counterweight block 108 from a blocked state to an open state. The side of the hollow disc 103 is provided with a plurality of material plates 109 that are recessed toward the center of the circle at an angle. The plurality of material plates 109 are arranged along the radial circumference of the hollow disc 103. The drive shaft 102 contains a hollow shaft, and the drive shaft 102 is provided with a liquid inlet chamber 110 and a liquid discharge chamber 111. The liquid inlet chamber 110 is connected to the liquid inlet of the hollow disc 103, and the liquid discharge chamber 111 is connected to the hollow disc 103. The channels in the hollow disc 103 are arranged in two fan-shaped shapes. The shell 101 is provided with a feed chamber 112 and a discharge chamber 113. The shell 101 is provided with a dust collector 114. The shell 101 wall is provided with a heating chamber 115. It also includes a drive mechanism 116 for driving the drive shaft 102 to rotate.

[0042] Among them, the shell 101 serves as the outer frame of the entire vacuum sludge waste heat drying device. Its core function is to construct a closed space and provide a stable vacuum environment foundation for sludge drying. By cooperating with the vacuum pump 300, the interior of the shell 101 can maintain a low pressure state, reduce the boiling point of the water in the sludge, accelerate the evaporation of water, and significantly improve the drying efficiency; at the same time, the shell 101 can isolate the external environment from interference, protect the internal components from external contamination, and constrain the flow path of sludge and steam to ensure that the drying process proceeds in an orderly manner. In addition, the heating chamber 115 set inside the wall of the shell 101 can be filled with a heating medium, and the waste heat is used to auxiliary heat the sludge in the shell, further enhancing the heat transfer effect and improving energy utilization.

[0043] The driving shaft 102 is rotatably arranged in the shell 101 and is a power transmission core component of the device. It is driven to realize forward and reverse rotation (first direction and second direction rotation) through the driving mechanism 116, and then drives the multiple hollow discs 103 coaxially arranged to rotate synchronously, thereby providing a power basis for the conveying and turning of sludge. The driving shaft 102 adopts a hollow structure, and the inside is provided with a liquid inlet cavity 110 and a liquid outlet cavity 111. The liquid inlet cavity 110 is in communication with the liquid inlet of the hollow disc 103, and the liquid outlet cavity 111 is in communication with the liquid outlet part of the hollow disc 103. This design enables the heating medium to enter the hollow disc 103 through the driving shaft 102 efficiently, and then be smoothly discharged after heat exchange, thereby forming a circulation channel of the heating medium and ensuring that the hollow disc 103 can continuously provide heat for the sludge.

[0044] The hollow disc 103 is coaxially fixed on the driving shaft 102, and multiple discs are distributed along the axial direction of the driving shaft 102 to form a multi-layer treatment structure, which can greatly increase the contact area with the sludge and improve the heat transfer efficiency. The internal passages of the hollow structure are arranged in two sectors, which cooperate with the liquid inlet cavity 110 and the liquid outlet cavity 111 of the driving shaft 102 to enable the heating medium to be uniformly distributed in the disc, ensure that the temperature of each region of the disc is consistent, and avoid uneven drying of the sludge. The partition plate 104 and the fixed shaft 105 at the edge of the hollow disc 103 together constitute a sludge treatment unit, which realizes the conveying and turning of the sludge with the rotation of the disc, and is a key component connecting power transmission and sludge treatment operation.

[0045] The partition plate 104 is arranged uniformly along the circumference of the edge of the hollow disc 103, and multiple independent sludge containing spaces are formed between adjacent partition plates 104, which can process the sludge in different regions and avoid the mixing of sludge in different regions to interfere with the drying process. These spaces are both channels for conveying sludge and places for drying reaction. The existence of the partition plate 104 can constrain the movement of the sludge within a specific range, ensure that the sludge fully contacts the components such as the hollow disc 103, the fixed plate 106 and the rotating plate 107, and improve the heat exchange efficiency. At the same time, the partition plate 104 provides a mounting fulcrum for the fixed shaft 105, ensures the stable assembly of the fixed plate 106 and the rotating plate 107, and provides a structural basis for the state switching of the two plates.

[0046] The fixed shaft 105 is installed between adjacent partition plates 104 and serves as a support carrier for the fixed plate 106 and the rotating plate 107. The position and angle of the fixed shaft 105 directly determine the inclination state of the two plates. Through the fixation of the fixed shaft 105, the fixed plate 106 maintains a constant inclination angle, while the rotating plate 107 can freely rotate around the fixed shaft 105. This design provides a mechanical basis for the state switching of the two plates when the driving shaft 102 rotates forward and reversely. The rigid connection of the fixed shaft 105 ensures that the fixed plate 106 will not be offset due to the impact force of the sludge during the conveying and turning of the sludge, thereby ensuring the stability of the device operation.

[0047] Fixed plate 106 is tilted and fixed to fixed shaft 105, with its angle designed to match the direction of sludge conveying. When drive shaft 102 rotates in a first direction, due to sludge resistance, rotating plate 107, located at the bottom, lies in the same plane as fixed plate 106, forming a continuous inclined conveying channel. This channel utilizes the centrifugal force during rotation and the tilt angle to push the sludge in a specific direction, achieving efficient sludge conveying. When drive shaft 102 rotates in a second direction, fixed plate 106 and rotating plate 107 are mirrored relative to partition plate 104, forming a symmetrical tilted structure. The mixing plate 109 stirs the sludge, increasing the contact area between the sludge and the heating element, while also breaking up crusts on the sludge surface, accelerating water evaporation, and improving drying uniformity.

[0048] Rotating plate 107 is rotatably mounted on fixed shaft 105, and its rotatable nature is central to switching the device's functions. When drive shaft 102 rotates in the first direction, the sludge thrust and centrifugal force cause rotating plate 107 to become coplanar with fixed plate 106, forming a conveying channel. When drive shaft 102 rotates in the second direction, the weight of counterweight 108 and the reaction force of the sludge cause rotating plate 107 to flip, forming a mirror image with fixed plate 106. The counterweight 108 on the side of rotating plate 107 seals the gaps between adjacent partitions 104, preventing sludge from leaking during the flipping process. Simultaneously, its tilt angle coordinates with material plate 109 to lift and drop the sludge upward, achieving sufficient flipping. The dynamic adjustment capability of rotating plate 107 enables the device to optimize its structure during both the conveying and drying stages, balancing conveying efficiency and drying effectiveness.

[0049] The counterweight 108 is set on the side of the rotating plate 107. Its triangular structure can provide sufficient gravitational torque within a limited space, ensuring that the rotating plate 107 can reliably flip to the blocking position when the drive shaft 102 rotates in the opposite direction. The sharp end of the triangle can reduce the contact resistance with the sludge, and its blocking surface is designed to be convex, which can form line contact or surface contact with the gap between adjacent partition plates 104, enhancing the sealing performance and preventing the leakage of sludge particles. In addition, the counterweight 108 is also provided with a driving surface. When the drive shaft rotates in the forward direction, the driving surface is acted upon by the thrust or centrifugal force of the sludge, which can overcome the gravity of the counterweight and drive the rotating plate 107 to open, ensuring the smooth flow of the conveying channel, realizing flexible switching between the blocked and open states, and improving the response speed of the device.

[0050] The material plates 109 are tilted and recessed toward the center of the hollow disk 103. Multiple plates are arranged along the radial circumference of the hollow disk 103. When the drive shaft 102 rotates in the first direction, the material plates 109 utilize their recessed structure and centrifugal force to squeeze the sludge toward the conveying channel at the edge, ensuring smooth passage of the sludge into the channel formed by the fixed plate 106 and the rotating plate 107, thereby improving conveying efficiency. When the drive shaft 102 rotates in the second direction, the material plates 109 rotate in the opposite direction of the disk. The recessed structure captures the sludge and lifts it upward, cooperating with the mirrored fixed plate 106 and rotating plate 107 to flip and break it up, allowing moisture within the sludge to quickly diffuse to the surface for evaporation. This prevents sludge from accumulating and scaling on the disk surface, ensuring stable heating efficiency.

[0051] The liquid inlet chamber 110 and the liquid discharge chamber 111 are located in the hollow structure of the drive shaft 102, and the two are isolated from each other to form independent channels. The liquid inlet chamber 110 transports the external heating medium to the hollow disc 103, and the liquid discharge chamber 111 discharges the medium that has flowed through the hollow disc 103 and completed the heat exchange. This dual-chamber design realizes a one-way circulation of the heating medium, avoids mixing of hot and cold media, and ensures heat exchange efficiency. The connection between the liquid inlet chamber 110 and the liquid inlet of the hollow disc 103, combined with the fan-shaped distribution of channels in the hollow disc 103, allows the heating medium to flow evenly through all areas of the disc, ensuring a consistent surface temperature of the disc and improving the uniformity of sludge drying.

[0052] The feed chamber 112 and discharge chamber 113 are located on the housing 101, serving as the inlet and outlet for the sludge, respectively. The feed chamber 112 is connected to external sludge conveying equipment via a pipeline. Its structural design reduces air leakage in a vacuum environment while evenly distributing the sludge to the processing area within the housing 101. The discharge chamber 113 smoothly discharges the dried sludge after drying. Its sealing structure ensures that the vacuum level within the housing 101 is not affected by the discharge process. The positioning of the two chambers aligns with the rotation trajectory of the hollow disc 103, ensuring that the sludge enters the processing area precisely during the conveying phase and is efficiently discharged after drying, minimizing residue.

[0053] Dust collector 114 is installed on housing 101. Its core function is to purify the steam exhaust gas generated during the drying process, capturing sludge, dust, and particulate impurities. This filtration prevents impurities from entering the subsequent condenser 200 and vacuum pump 300, preventing blockage of the condenser heat exchange tubes and wear of the vacuum pump blades, thereby extending the service life of the equipment. Furthermore, dust collected by the dust collector can be returned to housing 101 for re-drying, reducing material loss, improving resource utilization, and complying with environmental protection requirements.

[0054] Heating chamber 115 is located within the wall of housing 101. After heating medium is introduced through liquid inlet line 400, heat is radiated into the interior through the housing wall, creating a synergistic heating effect with hollow disk 103, improving the overall temperature uniformity within housing 101. Heating chamber 115 utilizes waste heat for heating, eliminating the need for significant additional energy consumption and reducing the operating costs of the device. Furthermore, its surround heating method fully heats the sludge near the inner wall of the housing, avoiding heating blind spots and improving drying efficiency.

[0055] The drive mechanism 116 provides rotational power for the drive shaft 102 and can precisely control the rotation direction (first direction / second direction), rotation speed and rotation time of the drive shaft 102 to meet the requirements of conveying speed and turning frequency in different drying stages. Its stable power output ensures the coordinated action of the hollow disc 103, fixed plate 106, rotating plate 107 and other components. It is the core power source for the device to achieve automated operation. By linking with the control system, the operating parameters can be adjusted in real time according to the degree of sludge drying, thereby improving the intelligence level of the device.

[0056] The vacuum sludge waste heat drying device of this application achieves multiple performance improvements through its unique forward and reverse rotation function. The forward and reverse rotation of the drive shaft 102 drives the synchronous operation of multiple hollow discs 103 arranged coaxially with it, thereby causing the fixed plates 106 and rotating plates 107 fixed to the edges of the hollow discs 103 to assume different working states.

[0057] When the drive shaft 102 rotates in the first direction, the fixed plate 106 and the rotating plate 107 are in the same plane, and they work together to form a smooth inclined conveying channel. During this process, as the hollow disc 103 rotates, centrifugal force and the tilt angle are used to quickly and efficiently push the sludge in a specific direction, greatly improving the sludge conveying efficiency within the device, reducing conveying time, gaining more time for subsequent drying processes, and improving overall drying efficiency.

[0058] When the drive shaft 102 rotates in the second direction, the fixed plate 106 and the rotating plate 107 are mirror-imaged relative to the partition plate 104. At this time, the counterweight 108 on the side of the rotating plate 107 blocks the gap between adjacent partition plates 104 to prevent sludge leakage. At the same time, the fixed plate 106 and the rotating plate 107 cooperate with the material plate 109 to forcefully flip the sludge. The material plate 109 is inclined and concave toward the center of the circle. When the disc rotates in the opposite direction, it holds the sludge and lifts it upward, and then the fixed plate 106 and the rotating plate 107 break up the sludge and throw it off. This flipping method greatly increases the contact area between the sludge and the heating components such as the hollow disc 103 and the heating chamber 115 in the wall of the shell 101, so that the moisture inside the sludge can quickly diffuse to the surface and evaporate, effectively avoiding the accumulation and scaling of sludge on the surface of the disc, ensuring the stability of the heating efficiency, improving the uniformity of drying, and ensuring that the quality of the dried sludge is more stable and the moisture content is lower.

[0059] The forward and reverse rotation functions also make the device more adaptable to different sludge properties. For viscous sludge, forward rotation allows for rapid transfer during the conveying phase, preventing adhesion; during the drying phase, reverse rotation provides thorough agitation, breaking down the sticky structure and achieving efficient drying. For granular sludge, both forward and reverse rotations also ensure orderly conveying and uniform drying. This flexible operating mode expands the device's application range and enhances its practicality under diverse operating conditions, providing the sludge treatment industry with an efficient, stable, and adaptable drying solution.

[0060] A vacuum waste heat sludge drying system includes any of the vacuum waste heat sludge drying devices described above, wherein the dust collector 114 of the drying device 100 is connected to the condenser 200 via a pipeline, and the condenser 200 is connected to the vacuum pump 300 via a pipeline. The system also includes a liquid inlet pipeline 400, which is connected to the liquid inlet chamber 110 and the heating chamber 115. The liquid discharge chamber 111 and the heating chamber 115 are connected to the liquid discharge pipeline 500. The liquid inlet pipeline 400 and the liquid discharge pipeline 500 are connected via a heater 600. A liquid replenishment pipeline 700 is provided on the liquid inlet pipeline 400.

[0061] Condenser 200 is connected to dust collector 114 and vacuum pump 300 via piping. Its function is to condense the exhaust steam from the dust collector into liquid water, thereby recycling the water. The condensation process reduces the humidity of the gas entering vacuum pump 300, preventing damage to the vacuum pump due to water vapor corrosion. The recovered water can also be used in other industrial processes, conserving water resources. The efficient condensation capacity of condenser 200 ensures that the steam within housing 101 can be discharged in a timely manner, maintaining the stability of the vacuum environment and indirectly improving the drying efficiency.

[0062] The vacuum pump 300 is the core device for maintaining the vacuum state within the housing 101. By continuously pumping air, the air pressure within the housing 101 is reduced, thereby lowering the boiling point of the water in the sludge, allowing it to evaporate at a lower temperature. This reduces reliance on high-temperature heating media and reduces energy consumption. Furthermore, the vacuum environment inhibits the activity of microorganisms in the sludge, preventing the generation of foul-smelling gases during the drying process and improving the working environment. The vacuum pump 300, in conjunction with the condenser 200, rapidly exhausts steam, maintaining a low pressure within the housing 101 and ensuring a continuous and efficient drying process.

[0063] The liquid inlet line 400 connects the heater 600 to the feed chamber 112 and the heating chamber 115. Its function is to transport the medium heated by the heater 600 to the components requiring heating, forming a supply channel for the heating medium. The branching design of the liquid inlet line 400 allows simultaneous supply of heating medium to multiple components, ensuring that the hollow disc 103 and the heating chamber 115 receive a sufficiently hot medium simultaneously, achieving synergistic heating. Furthermore, a valve on the liquid inlet line 400 controls the medium flow rate, adjusting the heating intensity according to drying requirements and enhancing energy flexibility.

[0064] The discharge line 500 connects the feed chamber 112, the heating chamber 115, and the heater 600. It transports the low-temperature medium after heat exchange back to the heater 600 for reheating, forming a closed medium circulation system. This circulation design significantly reduces heating medium consumption and lowers operating costs. Furthermore, a flow monitoring device on the discharge line 500 provides real-time feedback on the medium circulation status, allowing operators to adjust system parameters promptly to ensure heating stability.

[0065] Heater 600 connects to the liquid inlet line 400 and the liquid outlet line 500. Its core function is to heat the circulating medium to the required temperature for drying. Heater 600 can utilize a variety of energy sources, including industrial waste heat, steam, or electricity. The waste heat design aligns with energy conservation and effectively reduces the device's carbon emissions. By precisely controlling the heating temperature, heater 600 ensures stable heat output as the medium enters the hollow disc 103 and heating chamber 115, providing continuous thermal energy support for sludge drying.

[0066] The refill line 700, attached to the inlet line 400, replenishes the heating medium in the circulation system to compensate for medium loss due to leakage, evaporation, and other factors. A valve on the refill line 700 controls the amount of refill, ensuring a stable total amount of medium in the system and preventing a decrease in heating efficiency due to insufficient medium. Furthermore, the refill line 700 allows for the regular replacement of the circulating medium, preventing scaling or deterioration after long-term use, which could affect heat transfer efficiency and extend the system's maintenance cycle.

[0067] A vacuum sludge waste heat drying method, the specific steps are:

[0068] Step 1: Feed the sludge to be dried into the housing 101 through the feed chamber 112, and start the vacuum pump 300 to maintain a vacuum state in the housing 101;

[0069] Step 2: Control the driving mechanism 116 to drive the driving shaft 102 to rotate in a first direction, so that the fixed plate 106 and the rotating plate 107 on the edge of the hollow disc 103 are in the same plane, forming a sludge conveying channel. The material plate 109 is used to squeeze the sludge into the sludge conveying channel;

[0070] Step 3: A heating medium is introduced into the liquid inlet chamber 110 of the drive shaft 102. The heating medium flows through the hollow disc 103 and is discharged from the liquid discharge chamber 111. At the same time, a heating medium is introduced into the heating chamber 115 in the wall of the housing 101 to heat and dry the sludge using the residual heat.

[0071] Step 4: During the drying process, the drive shaft 102 is controlled to rotate in the second direction, so that the fixed plate 106 and the rotating plate 107 are mirror-imaged relative to the partition plate 104. The counterweight 108 on the side of the rotating plate 107 blocks the gap between adjacent partition plates 104. At the same time, the material plate 109 is used to turn the sludge. The generated steam and exhaust gas are discharged from the gap between the adjacent partition plates 104 opened at the top, and enter the condenser 200 through the dust collector 114 for condensation.

[0072] Step 5: After drying is completed, the driving shaft 102 is controlled to rotate in the first direction, and the dried sludge is transported to the discharge chamber 113 through the gap between the material plate 109 on the side of the hollow disc 103 and the adjacent partition plates 104 for discharge.

[0073] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the scope of protection of the present invention.

Claims

1. A vacuum sludge waste heat drying device, the drying device (100) comprising: A housing (101) is provided with a drive shaft (102) for rotation in the housing (101), and a plurality of hollow discs (103) are coaxially provided on the drive shaft (102), wherein the hollow disc (103) is provided with a plurality of partition plates (104) on the circumference of the edge, and a fixed shaft (105) is provided between adjacent partition plates (104), and the partition plates (104) are fixed shafts (105). ) provides an installation fulcrum, a fixed plate (106) is fixedly arranged on the fixed shaft (105) and a rotating plate (107) is rotatably arranged, when the drive shaft (102) rotates along a first direction, the fixed plate (106) and the rotating plate (107) are in the same plane, when the drive shaft (102) rotates along a second direction, the fixed plate (106) and the rotating plate (107) are mirror-imaged relative to the partition plate (104), a counterweight (108) is arranged on the side of the rotating plate (107) for blocking the gap between adjacent partition plates (104), the drive shaft (102) is a hollow shaft, a liquid inlet chamber (110) and a liquid discharge chamber (111) are arranged in the drive shaft (102), the liquid inlet chamber (110) is connected to the liquid inlet of the hollow disc (103), and the liquid discharge chamber (111) is connected to the hollow disc (103).

2. The vacuum sludge waste heat drying device according to claim 1, characterized in that: The counterweight (108) is triangular.

3. The vacuum sludge waste heat drying device according to claim 2, characterized in that: The sealing surface of the counterweight (108) is a convex surface.

4. The vacuum sludge waste heat drying device according to claim 3, characterized in that: The counterweight block (108) further comprises a driving surface for driving the counterweight block (108) to change from a blocked state to an open state.

5. The vacuum sludge waste heat drying device according to claim 4, characterized in that: The side of the hollow disc (103) is provided with a plurality of material plates (109) that are recessed toward the center of the disc.

6. The vacuum sludge waste heat drying device according to claim 5, characterized in that: The plurality of material plates (109) are arranged along the radial circumference of the hollow disc (103).

7. The vacuum sludge waste heat drying device according to claim 6, characterized in that: The channels in the hollow disc (103) are arranged in two fan shapes.

8. The vacuum sludge waste heat drying device according to claim 7, characterized in that: The housing (101) is provided with a feed cavity (112) and a discharge cavity (113).

9. The vacuum sludge waste heat drying device according to claim 8, characterized in that: A dust collector (114) is provided on the housing (101).

10. The vacuum sludge waste heat drying device according to claim 9, characterized in that: A heating chamber (115) is provided inside the wall of the housing (101).

11. The vacuum sludge waste heat drying device according to claim 10, characterized in that: It also includes a driving mechanism (116) for driving the driving shaft (102) to rotate.

12. A vacuum waste heat sludge drying system, comprising the vacuum waste heat sludge drying device according to claim 11, characterized in that: The dust collector (114) of the drying device (100) is connected to the condenser (200) via a pipeline, and the condenser (200) is connected to the vacuum pump (300) via a pipeline.

13. The vacuum waste heat sludge drying system according to claim 12, characterized in that: The device further comprises a liquid inlet pipeline (400), wherein the liquid inlet pipeline (400) is connected to the liquid inlet chamber (110) and the heating chamber (115), the liquid discharge chamber (111) and the heating chamber (115) are connected to the liquid discharge pipeline (500), and the liquid inlet pipeline (400) and the liquid discharge pipeline (500) are connected via a heater (600).

14. The vacuum waste heat sludge drying system according to claim 13, characterized in that: A liquid replenishing pipeline (700) is provided on the liquid inlet pipeline (400).

15. A vacuum sludge waste heat drying method, comprising the vacuum waste heat sludge drying system according to claim 14, characterized in that: The specific steps are: Step 1: Feed the sludge to be dried into the housing (101) through the feed chamber (112), and start the vacuum pump (300) to maintain a vacuum state in the housing (101); Step 2: Control the driving mechanism (116) to drive the driving shaft (102) to rotate in a first direction, so that the fixed plate (106) and the rotating plate (107) on the edge of the hollow disc (103) are in the same plane, forming a sludge conveying channel, and the material plate (109) is used to squeeze the sludge into the sludge conveying channel; Step 3: A heating medium is introduced into the liquid inlet cavity (110) of the drive shaft (102). The heating medium flows through the hollow disc (103) and is discharged from the liquid discharge cavity (111). At the same time, a heating medium is introduced into the heating cavity (115) in the wall of the housing (101), and the waste heat is used to heat and dry the sludge. Step 4: During the drying process, the driving shaft (102) is controlled to rotate in the second direction, so that the fixed plate (106) and the rotating plate (107) are arranged in a mirror image relative to the partition plate (104), the counterweight (108) on the side of the rotating plate (107) blocks the gap between adjacent partition plates (104), and the material plate (109) is used to turn the sludge. The generated steam exhaust gas is discharged from the gap between the adjacent partition plates (104) opened at the top, and enters the condenser (200) through the dust collector (114) for condensation; Step 5: After drying is completed, the drive shaft (102) is controlled to rotate in the first direction, and the dried sludge is transported to the discharge chamber (113) through the gap between the material plate (109) on the side of the hollow disc (103) and the adjacent partition plates (104) for discharge.

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