Vacuum waste heat sludge drying and dedusting device and vacuum waste heat sludge drying device

Abstract

The application discloses a vacuum residual heat sludge drying and dust removing device and a vacuum residual heat sludge drying device, and belongs to the technical field of sludge drying. A communication hole is arranged on a sealing plate in a suction chamber, a frame body is installed at the communication hole, a plurality of arc-shaped plates capable of being combined into a cylinder are connected to the frame body through rotating shafts, a torsional spring is arranged on the rotating shafts to make the arc-shaped plates outwardly spread, a driving gear is installed on one of the rotating shafts through a one-way bearing, a bottom plate is arranged at the bottom of the frame body, a brush is arranged in the frame body, a cloth bag frame is detachably arranged in the frame body, an external gear ring is arranged on the cloth bag frame, a driving shaft is arranged on a dust removing shell, the driving shaft is engaged with the external gear ring through a first gear set, and the driving shaft is engaged with the driving gear through a second gear set. The application realizes the functions of dust removal and sealing through the driving shaft rotating in two directions and cooperating with the one-way bearing, thereby realizing the functions of online cleaning of the cloth bag and online replacement of the cloth bag without shutdown. The application has the advantages of simple structure and high working efficiency.

Description

Technical Field

[0001] This invention belongs to the field of sludge drying technology, and in particular to a vacuum waste heat sludge drying and dust removal device and a vacuum waste heat sludge drying device. Background Technology

[0002] Vacuum sludge drying is a technology that utilizes a negative pressure environment to dewater and reduce the volume of sludge. It is widely used in the disposal of sludge generated in municipal sewage treatment, industrial wastewater treatment, and other fields. Its core principle is to establish a vacuum state in a sealed container, lower the boiling point of water, and allow the water in the sludge to evaporate rapidly at a lower temperature. The water vapor is then recovered through condensation, thereby significantly reducing the water content of the sludge and achieving sludge volume reduction and stabilization.

[0003] Existing vacuum sludge drying methods require the addition of a dust removal device between the vacuum system and the sludge drying equipment to establish a vacuum environment. Current dust removal devices use external air sources for pulse cleaning of the filter bags. However, in a vacuum environment, the entry of external air into the vacuum dust collector disrupts the pressure balance within the sludge drying device, causing a rise in flash evaporation temperature. Some droplets adhere to the dust collector bags, resulting in localized sludge formation. When the pressure in the sludge drying device recovers, the water in this portion of the sludge re-flashes, causing localized clumping of the filter bags, leading to partial failure and reduced dust removal capacity. Furthermore, the vacuum dust collector requires shutdown for filter bag replacement, making online replacement impossible and reducing production efficiency. Summary of the Invention

[0004] Purpose of the invention: To provide a vacuum waste heat sludge drying and dust removal device and a vacuum waste heat sludge drying device to solve the above-mentioned problems existing in the prior art.

[0005] Technical Solution: A vacuum waste heat sludge drying and dust removal device, comprising: a dust removal shell, wherein the dust removal shell is divided into an air extraction chamber and a dust removal chamber by a sealing plate; the air extraction chamber is divided into multiple air extraction sub-chambers by a partition plate; the sealing plate in each air extraction sub-chamber has a connecting hole; a frame is installed at the connecting hole; multiple arc-shaped plates that can be assembled into a cylinder are connected to the frame by rotating shafts; the multiple rotating shafts are connected by a synchronous belt mechanism or a sprocket mechanism; a torsion spring is provided on the rotating shaft to cause the arc-shaped plates to unfold outward; a drive gear is installed on one of the rotating shafts by a one-way bearing; a base plate is provided at the bottom of the frame; a brush is provided inside the frame; a bag frame is detachably provided inside the frame; a bag is fitted on the bag frame; an external gear ring is provided on the bag frame; a drive shaft is provided on the dust removal shell; the drive shaft meshes with the external gear ring through a first gear set; and the drive shaft meshes with the drive gear through a second gear set.

[0006] Furthermore, a fixed sealing ring is fitted on the frame, the fixed sealing ring is located on the lower end face of the sealing plate, a limiting ring with an L-shaped cross-section is slidably arranged inside the fixed sealing ring, a thrust spring is arranged between the fixed sealing ring and the limiting ring, the upper end of the fixed sealing ring is connected to the air extraction chamber through a connecting port, and a pressure relief and vacuum breaking pipeline is arranged on the air extraction chamber.

[0007] Furthermore, the air extraction chamber and the dust removal chamber are connected by a connecting pipe, and a valve is installed on the connecting pipe.

[0008] Furthermore, the extraction chamber is provided with a separate top cover.

[0009] Furthermore, an observation window is provided on the top cover.

[0010] Furthermore, the air extraction chamber is provided with an air extraction port.

[0011] Furthermore, the inner arc surface of the arc plate has a first sealing surface on three sides, and the outer arc surface of the arc plate has a second sealing surface on the remaining single side.

[0012] Furthermore, the frame includes an upper ring body and a lower ring body, which are connected by multiple connecting rods, and the connecting rods are provided with brushes near the side of the cloth bag.

[0013] Furthermore, a positioning cone is provided on the base plate, and the positioning cone cooperates with the center positioning groove at the bottom of the bag frame.

[0014] Furthermore, the extraction chamber is equipped with a dustproof protective cover for the first gear set, the second gear set, and the synchronous belt mechanism / sprocket mechanism.

[0015] A vacuum waste heat sludge drying device includes the vacuum waste heat sludge drying dust removal device described in any one of the above claims, wherein at least one of the dust removal devices is installed on the vacuum sludge drying mechanism.

[0016] Furthermore, the vacuum sludge drying mechanism is a vacuum drying box.

[0017] Furthermore, the vacuum sludge drying mechanism is a vacuum disc dryer.

[0018] Beneficial effects:

[0019] This application uses a drive shaft to rotate the filter bag frame, which, together with the brushes on the frame, achieves mechanical dust removal without the need for an external air source. This avoids pressure imbalance and temperature fluctuations, ensuring that the filter bag always maintains a high-efficiency filtration state, and significantly improving dust removal capacity and stability.

[0020] This application divides the vacuum chamber into multiple independent vacuum sub-chambers, each equipped with an independently operable top cover and arc-shaped plate sealing assembly. When changing the filter bag, the drive shaft drives the drive gear to form a closed space with the arc-shaped plate corresponding to the sub-chamber. The pressure is balanced by the pressure relief and vacuum breaking pipeline, and the top cover can be opened for online replacement without stopping the machine. Other sub-chambers operate normally, solving the problem of stopping the machine to change bags in traditional devices, and significantly improving production continuity and efficiency.

[0021] This application achieves dust removal and sealing functions by using a drive shaft that rotates in two different directions in conjunction with a one-way bearing, thereby enabling online cleaning of the filter bags and online replacement of filter bags without stopping the machine. This application has a simple structure and high working efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the vacuum waste heat sludge drying device of the present invention;

[0023] Figure 2 This is a schematic diagram of the dust removal device of the present invention;

[0024] Figure 3 This is the present invention. Figure 2 A magnified view of part A in the image;

[0025] Figure 4 This is a schematic diagram of the arc-shaped plate of the present invention;

[0026] Figure 5 This is a schematic diagram of the frame structure of the present invention;

[0027] Figure 6 This is a perspective view of the dust removal device of the present invention;

[0028] Figure 7 This is a schematic diagram of the partition installation position of the present invention;

[0029] Figure 8 This is a schematic diagram of the mounting position of the base plate of the present invention.

[0030] The attached figures are labeled as follows: dust removal device 100, dust removal housing 101, sealing plate 102, air extraction chamber 103, dust removal chamber 104, partition plate 105, air extraction compartment 106, connecting hole 107, frame 108, rotating shaft 109, arc plate 110, drive gear 111, bottom plate 112, bag frame 113, external gear ring 114, drive shaft 115, fixed sealing ring 116, limiting ring 117, thrust spring 118, connecting port 119, pressure relief and vacuum breaking pipeline 120, connecting pipeline 121, top cover 122, observation window 123, air extraction port 124, first sealing surface 125, second sealing surface 126, upper ring body 127, lower ring body 128, connecting rod 129, positioning cone 130, dustproof protective cover 131, and vacuum sludge drying mechanism 200. Detailed Implementation

[0031] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0032] like Figures 1 to 8As shown, a vacuum waste heat sludge drying and dust removal device is disclosed. The dust removal device 100 includes: a dust removal shell 101, wherein the dust removal shell 101 is divided into an air extraction chamber 103 and a dust removal chamber 104 by a sealing plate 102; the air extraction chamber 103 is divided into multiple air extraction sub-chambers 106 by a partition plate 105; the sealing plate 102 in each air extraction sub-chamber 106 is provided with a connecting hole 107; a frame 108 is installed at the connecting hole 107; multiple arc-shaped plates 110 that can be assembled into a cylinder are connected to the frame 108 by a rotating shaft 109; the multiple rotating shafts 109 are connected by a synchronous belt mechanism or a sprocket mechanism. A torsion spring is provided on the 109 to cause the arc plate 110 to tend to expand outward. A drive gear 111 is mounted on one of the rotating shafts 109 through a one-way bearing. A base plate 112 is provided at the bottom of the frame 108. A brush is provided inside the frame 108. A bag frame 113 is detachably provided inside the frame 108. A bag is fitted on the bag frame 113. An external gear ring 114 is provided on the bag frame 113. A drive shaft 115 is provided on the dust collector housing 101. The drive shaft 115 meshes with the external gear ring 114 through a first gear set. The drive shaft 115 meshes with the drive gear 111 through a second gear set. A fixing sealing ring 116 is fitted onto the frame 108. The fixing sealing ring 116 is located on the lower end face of the sealing plate 102. A limiting ring 117 with an L-shaped cross-section is slidably disposed inside the fixing sealing ring 116. A thrust spring 118 is disposed between the fixing sealing ring 116 and the limiting ring 117. The upper end of the fixing sealing ring 116 is connected to the vacuum extraction chamber 106 through a connecting port 119. The vacuum extraction chamber 106 is provided with a pressure relief and vacuum breaking pipeline 120. The vacuum extraction chamber 106 is connected to the dust removal chamber 104 through a connecting pipeline 121, which is provided with a valve. A separate top cover 122 is provided on the vacuum extraction chamber 106. An observation window 123 is provided on the top cover 122. A vacuum port 124 is provided on the vacuum extraction chamber 106. The inner arc surface of the arc plate 110 has a first sealing surface 125 on three sides, and the remaining single side of the outer arc surface of the arc plate 110 has a second sealing surface 126. The frame 108 includes an upper ring 127 and a lower ring 128, which are connected by multiple connecting rods 129. Each connecting rod 129 has a brush near the side of the bag. A positioning cone 130 is provided on the bottom plate 112, and the positioning cone 130 engages with the central positioning groove at the bottom of the bag frame 113. The extraction chamber 106 is equipped with a dustproof protective cover 131 for the first gear set, the second gear set, and the synchronous belt / sprocket mechanism.

[0033] The dust collector housing 101 serves as the external frame of the entire dust collector, providing installation space and structural support for all internal components. It also forms a closed dust collector environment, ensuring stable dust collector operations under vacuum conditions and preventing untreated external air from entering the system and disrupting the vacuum environment. The sealing plate 102 divides the internal space of the dust collector housing 101 into an air extraction chamber 103 and a dust collector chamber 104, enabling the two chambers to work independently yet collaboratively. The extraction chamber is responsible for creating a vacuum environment by extracting air, while the dust removal chamber is responsible for filtering the dust generated during sludge drying. The two are connected in an orderly manner through subsequent structures to ensure that the dust removal and extraction processes do not interfere with each other. The partition 105 divides the extraction chamber 103 into multiple extraction sub-chambers 106. Each extraction sub-chamber can operate independently. When a certain extraction sub-chamber needs maintenance or bag replacement, the other extraction sub-chambers can still work normally, realizing online bag replacement and improving production efficiency. The connecting hole 107 is set on the sealing plate 102 to connect the extraction sub-chambers 106 and the dust removal chamber 104, allowing dust-laden gas to enter the extraction sub-chamber from the dust removal chamber, while also providing a channel for the installation of components such as the bag frame. The frame 108 is installed at the connecting hole 107 and serves as the mounting carrier for components such as the arc plate and the bag frame. Its internal structure provides support and protection for the filter bag. At the same time, through its own structural design, it works with the brush to clean the filter bag and ensure the filter performance of the filter bag. The rotating shaft 109 connects the frame 108 and the arc plate 110, so that the arc plate can rotate around it and realize the opening and closing of the arc plate. Multiple rotating shafts are connected by a synchronous belt mechanism or a sprocket mechanism to ensure that all arc-shaped plates move synchronously and to ensure the stability of the assembled cylinder structure. Multiple arc-shaped plates 110 can be assembled into a cylinder, which can seal the dust removal chamber 104 when changing the filter bag, ensuring the normal operation of the vacuum drying equipment. Under the action of the torsion spring, the arc-shaped plates tend to expand outward. With the action of the drive gear and other components, the cylinder opens and closes to meet the needs of different working conditions. The torsion spring is set on the rotating shaft 109 to provide the arc-shaped plates 110 with an outward expansion force, ensuring that the arc-shaped plates can remain in the expanded state when no external force is applied, providing an air passage for dust removal. A one-way bearing is installed between one of the rotating shafts 109 and the drive gear 111, so that the drive gear can only drive the rotating shaft to rotate in one direction. This ensures that the movement of the arc-shaped plates in a specific direction is controllable. That is, when the drive gear 111 rotates in the first direction, it can drive the rotating shaft 109 to rotate. When it rotates in the second direction, it cannot drive the rotating shaft 109 to rotate. This, in turn, cooperates with the drive shaft 115 to close the arc-shaped plates 110. The drive gear 111 is mounted on the rotating shaft 109 via a one-way bearing and meshes with the second gear set. Driven by the drive shaft 115, it rotates, which in turn drives the arc-shaped plate 110 to close, thus controlling the flow of air. The base plate 112 is located at the bottom of the frame 108, providing support and enclosure for the internal components, preventing dust leakage from the bottom of the frame, and providing a positioning reference for the installation of the bag filter.The brush is installed inside the frame 108. When the bag holder 113 rotates, the brush can clean the surface of the bag, removing dust adhering to the bag and achieving a dust removal function. This prevents dust from clogging the bag and affecting the filtration efficiency, and it does not require the introduction of an external air source, thus not disrupting the pressure balance of the vacuum environment. The bag holder 113 is used to mount the bag, providing support and keeping it in an unfolded state to increase the filtration area. The bag holder is detachably installed inside the frame 108 for easy bag replacement and maintenance. The bag, mounted on the bag holder 113, is the core component of the dust removal system. Through its filtration function, it traps dust in the dust-laden gas, purifying the gas and ensuring that the gas entering the vacuum system is clean, preventing contamination of the vacuum equipment. The external gear ring 114 is mounted on the bag holder 113 and meshes with the first gear set. Driven by the drive shaft 115, it rotates, thereby driving the bag holder 113 and the bag to rotate together. This, in conjunction with the brush, achieves all-around dust removal and improves the dust removal effect. The drive shaft 115, as a key component for power transmission, meshes with the external gear ring 114 through the first gear set, driving the bag frame to rotate. Simultaneously, it meshes with the drive gear 111 through the second gear set, driving the arc plate to close. This achieves coordinated control of the bag rotation for dust removal and the arc plate's opening and closing, simplifying the drive structure and improving equipment stability. The first gear set connects the drive shaft 115 and the external gear ring 114, transmitting power from the drive shaft to the bag frame 113, enabling its rotation. Its gear transmission features precise transmission ratios and high efficiency, ensuring stable and reliable bag frame rotation. The second gear set connects the drive shaft 115 and the drive gear 111, transmitting power from the drive shaft to the rotating shaft 109, driving the arc plate 110. It also features precise and reliable transmission, ensuring coordinated movement between the arc plate and the bag frame.

[0034] The fixed sealing ring 116 is fitted onto the frame 108 and located on the lower end face of the sealing plate 102. It cooperates with the limiting ring 117 to form a sealing structure, enhancing the sealing between the vacuum chamber 106 and the dust removal chamber 104, preventing vacuum leakage, maintaining pressure stability, and providing movement space for the limiting ring 117. The connecting port 119 on the fixed sealing ring 116 can maintain communication with the vacuum chamber 106. When the pressure in the vacuum chamber 106 increases, it can drive the limiting ring 117 to move, preventing the arc plate 110 from resetting and ensuring the sealing performance of the arc plate 110. The limiting ring 117 has an L-shaped cross-section and is slidably disposed within the fixed sealing ring 116. Under the action of the thrust spring 118, it has a reset function.

[0035] The pressure relief and vacuum breaking pipeline 120 is installed on the air extraction chamber 106. When it is necessary to replace the filter bag or maintain the air extraction chamber, the pressure is relieved and the vacuum is broken through this pipeline to restore the pressure in the air extraction chamber to atmospheric pressure. This makes it convenient for operators to operate and allows for the processing of a single air extraction chamber without stopping the machine. At the same time, after the vacuum is broken, the limiting ring 117 can be driven to move downward to limit the arc plate 110.

[0036] Connecting pipe 121 connects the extraction chamber 106 and the dust collection chamber 104. After replacement, the pressure connection between the extraction chamber 106 and the dust collection chamber 104 can be achieved through connecting pipe 121, allowing the thrust spring 118 to push the limit ring 117 to reset. At this time, the arc plate 110 unfolds through the torsion spring to form a dust collection channel for dust removal. The top cover 122 is separately installed on the extraction chamber 106 and can be opened and closed, providing a passage for the installation, replacement, and maintenance of components inside the extraction chamber. When the filter bag needs to be replaced, only the top cover of the corresponding extraction chamber needs to be opened, without stopping the machine, enabling online replacement. The observation window 123 is installed on the top cover 122, allowing operators to easily observe the working conditions inside the extraction chamber 106, such as the filtration status of the filter bag and the dust removal effect, so as to promptly identify and handle problems and improve the reliability of equipment operation. The exhaust port 124 is located on the exhaust chamber 106 and is used to connect to the vacuum system. Through the suction action of the vacuum system, a vacuum environment is created within the exhaust chamber and the dust removal chamber, providing the necessary vacuum conditions for sludge drying and dust removal processes. The first sealing surface 125 is located on three sides of the inner arc surface of the arc plate 110. When multiple arc plates are assembled into a cylinder, the first sealing surfaces of adjacent arc plates fit together, forming a good seal and preventing unfiltered dust-laden gas from directly entering the exhaust chamber, ensuring the dust removal effect. The second sealing surface 126 is located on the remaining single side of the outer arc surface of the arc plate 110. When the arc plate is unfolded or closed, it contacts related components such as the frame or other arc plates, playing an auxiliary sealing role, further enhancing the sealing performance of the equipment and maintaining the stability of the vacuum environment. The upper ring 127 and lower ring 128 are components of the frame 108, connected by multiple connecting rods 129 to form the frame structure of the frame. This provides installation positions and support for components such as the arc plates, brushes, and bag holders, ensuring the structural strength and stability of the frame. Connecting rod 129 connects upper ring 127 and lower ring 128 to form the overall structure of the frame. A brush is installed near the bag side; when the bag rotates, the brush thoroughly cleans the bag surface, achieving dust removal without an external air source, thus avoiding disruption of the vacuum environment. Positioning cone 130 is installed on the base plate 112 and engages with the positioning groove at the center of the bottom of the bag frame 113. This positions the bag frame accurately and stably within the frame 108, preventing unstable bag rotation or poor sealing due to installation deviations, and reducing friction during bag frame 113 rotation. Dustproof cover 131 is installed within the extraction chamber 106 to protect the first gear set, second gear set, and synchronous belt / sprocket mechanism. This prevents dust from entering these transmission components, avoiding reduced transmission efficiency, accelerated component wear, or malfunctions due to dust adhesion, extending the equipment's service life, and ensuring stable operation of the transmission system.

[0037] The independence of the extraction chamber 106, the sealing control of the arc plate 110, and the functional reuse of the drive shaft 115 work together to achieve online bag replacement and dust removal, specifically including:

[0038] Chamber isolation mechanism: Multiple extraction chambers 106 are physically isolated by partitions 105. Each extraction chamber 106 is equipped with an independent top cover 122, pressure relief and vacuum breaking pipeline 120 and connecting pipeline 121, so that a single chamber can be depressurized and maintained independently without affecting the operation of other chambers.

[0039] Arc plate sealing mechanism: When the drive shaft 115 rotates in the opposite direction, the second gear set and the one-way bearing drive the arc plate 110 to close and assemble into a cylinder, sealing the connecting hole 107. At the same time, the limiting ring 117 moves down to lock the position of the arc plate after the pressure is released, forming a sealed isolation area.

[0040] Drive shaft reuse mechanism: When the drive shaft 115 rotates forward, it drives the bag frame 113 to rotate and clean the dust through the first gear set. When it rotates in reverse, it drives the arc plate 110 to close and seal through the second gear set. A single power source realizes the switching between dust cleaning and isolation functions.

[0041] A vacuum waste heat sludge drying device includes the vacuum waste heat sludge drying dust removal device described in any of the above claims, wherein at least one of the dust removal devices 100 is installed on the vacuum sludge drying mechanism 200. The vacuum sludge drying mechanism 200 is a vacuum drying box. The vacuum sludge drying mechanism 200 is a vacuum disc dryer.

[0042] Work process:

[0043] During the dust removal operation, the vacuum system evacuates air from each extraction chamber 106 through the extraction port 124, creating a stable vacuum environment between the dust removal chamber 104 and the extraction chamber 103. Dust-laden gas enters from the dust removal chamber 104, is filtered by the filter bags on the bag holder 113, and the dust is trapped. Clean gas enters the extraction chamber 106 through the connecting hole 107 and is finally discharged through the extraction port 124. Simultaneously, the drive shaft 115 rotates clockwise, driving the external gear ring 114 to rotate via the first gear set, causing the bag holder 113 and the filter bags to rotate. The brushes on the frame 108 clean the surface of the filter bags, achieving mechanical dust removal. At this time, the arc-shaped plate 110 remains extended under the action of the torsion spring, ensuring that the airflow only passes through the filter bags.

[0044] During the bag replacement preparation stage, when the bag in a certain extraction chamber 106 needs to be replaced, the valve of the corresponding connecting pipe 121 is closed. The drive shaft 115 reverses, and the drive shaft 115 drives the drive gear 111 to rotate through the second gear set. The one-way bearing drives the rotating shaft 109 to rotate, causing the arc plate 110 to close against the torsion spring force, thus forming a closed cylinder with a closed connecting hole 107. The pressure in the extraction chamber 106 is balanced through the pressure relief and vacuum breaking pipe 120. Under atmospheric pressure, the limiting ring 117 moves downward to limit the arc plate 110, ensuring that the vacuum environment of the dust removal chamber 104 is not affected.

[0045] During the bag replacement and restoration phase, open the top cover 122 of the extraction chamber 106, remove the old bag holder 113, and precisely install the new bag holder using the positioning cone 130 on the base plate 112. After closing the top cover 122, open the valve on the connecting pipe 121, connecting the extraction chamber 106 and the dust collection chamber 104 under pressure, and the limit ring 117 resets. The arc plate 110 unfolds under the action of the torsion spring, and the extraction chamber 106 is put back into operation, while the other chambers continue to operate normally.

[0046] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A vacuum waste heat sludge drying and dust removal device, characterized in that, The dust removal device (100) includes: a dust removal housing (101), wherein the dust removal housing (101) is divided into an air extraction chamber (103) and a dust removal chamber (104) by a sealing plate (102), the air extraction chamber (103) is divided into multiple air extraction sub-chambers (106) by a partition plate (105), the sealing plate (102) in the air extraction sub-chamber (106) is provided with a connecting hole (107), and a frame (108) is installed at the connecting hole (107). 8) Multiple arc-shaped plates (110) that can be assembled into a cylinder are connected by a rotating shaft (109). The multiple rotating shafts (109) are connected by a synchronization mechanism. A torsion spring is provided on the rotating shaft (109) to make the arc-shaped plates (110) tend to unfold outward. A drive gear (111) is installed on one of the rotating shafts (109) through a one-way bearing. A base plate (112) is provided at the bottom of the frame (108). A brush is provided inside the frame (108). 8) A detachable bag holder (113) is provided inside, on which a bag is fitted. An external gear ring (114) is provided on the bag holder (113). A drive shaft (115) is provided on the dust collector housing (101). The drive shaft (115) meshes with the external gear ring (114) through a first gear set, and meshes with the drive gear (111) through a second gear set. A fixing sealing ring (116) is fitted on the frame (108). A fixed sealing ring (116) is located on the lower end face of the sealing plate (102). A limiting ring (117) with an L-shaped cross-section is slidably arranged inside the fixed sealing ring (116). A thrust spring (118) is arranged between the fixed sealing ring (116) and the limiting ring (117). The upper end of the fixed sealing ring (116) is connected to the vacuum chamber (106) through a connecting port (119). A pressure relief and vacuum breaking pipeline (120) is arranged on the vacuum chamber (106).

2. The vacuum waste heat sludge drying and dust removal device according to claim 1, characterized in that, The air extraction chamber (106) and the dust removal chamber (104) are connected by a connecting pipe (121), and a valve is provided on the connecting pipe (121).

3. The vacuum waste heat sludge drying and dust removal device according to claim 1, characterized in that, The air extraction chamber (106) is provided with a separate top cover (122).

4. The vacuum waste heat sludge drying and dust removal device according to claim 3, characterized in that, An observation window (123) is provided on the top cover (122).

5. The vacuum waste heat sludge drying and dust removal device according to claim 1, characterized in that, An air extraction port (124) is provided on the air extraction chamber (106).

6. The vacuum waste heat sludge drying and dust removal device according to claim 1, characterized in that, The inner arc surface of the arc plate (110) is provided with a first sealing surface (125) on three sides, and the outer arc surface of the arc plate (110) is provided with a second sealing surface (126) on the remaining single side.

7. The vacuum waste heat sludge drying and dust removal device according to claim 1, characterized in that, The frame (108) includes an upper ring (127) and a lower ring (128), which are connected by a plurality of connecting rods (129), and the connecting rods (129) are provided with brushes near the side of the cloth bag.

8. The vacuum waste heat sludge drying and dust removal device according to claim 1, characterized in that, A positioning cone (130) is provided on the base plate (112), and the positioning cone (130) cooperates with the center positioning groove at the bottom of the bag frame (113).

9. The vacuum waste heat sludge drying and dust removal device according to claim 1, characterized in that, The air extraction chamber (106) is provided with a dustproof protective cover (131) for the first gear set, the second gear set and the synchronization mechanism.

10. A vacuum waste heat sludge drying device, comprising the vacuum waste heat sludge drying and dust removal device according to any one of claims 1-9, characterized in that, At least one of the dust removal devices (100) is installed on the vacuum sludge drying mechanism (200).

11. The vacuum waste heat sludge drying device according to claim 10, characterized in that, The vacuum sludge drying mechanism (200) is a vacuum drying box.

12. The vacuum waste heat sludge drying device according to claim 10, characterized in that, The vacuum sludge drying mechanism (200) is a vacuum disc dryer.

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