A multi-stage sludge treatment device

Abstract

This invention discloses a multi-stage sludge treatment device, including a mixing and pelletizing mechanism. The mixing and pelletizing mechanism includes an equipment box, with a drying tank located at the bottom inside the equipment box. Storage tanks and transfer tanks are respectively located on both sides of the equipment box, above the drying tank. This invention relates to the field of sludge treatment technology. This multi-stage sludge treatment device, by combining the mixing and pelletizing mechanism with the drying and maintenance mechanism, allows the sludge to be pre-mixed with lime powder inside the mixing drum before high-temperature drying. The reaction between the lime powder and water provides the sludge with initial disinfection and drying. Subsequently, a cylinder drives the sludge for transfer and small-scale cutting. Finally, the coordinated operation of the structures completes the drying and subsequent efficiency improvements, effectively enhancing the quality and efficiency of sludge recycling and treatment, meeting current application requirements.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, specifically to a multi-stage sludge treatment device. Background Technology

[0002] Sludge typically refers to the solid-liquid mixed flocculent material generated during the wastewater treatment process at wastewater treatment plants. It mainly originates from processes such as primary sedimentation tanks and secondary sedimentation tanks. After recycling, the sludge can be used in other fields, such as building material preparation, agricultural utilization, and environmental remediation.

[0003] Currently, sludge cannot be directly recycled after it is generated and requires multi-stage treatment. The typical treatment method involves filtering out large solids from the sludge, followed by dewatering and solidification before it can be reused. Although existing sludge drying equipment can achieve the drying purpose, it still has significant shortcomings in practical use, such as:

[0004] Conventional sludge recycling processes typically involve directly feeding the filtered sludge into a drying device for high-temperature drying. This process aims to eliminate insect eggs and bacteria in the sludge, ensuring its safety for subsequent use. However, to eliminate most of the bacteria and insect eggs, at least twenty minutes of high-temperature drying is required. Existing equipment uses a conveyor belt to transport the sludge, and the internal travel distance is insufficient for this purpose. As a result, although the sludge is solidified, it does not undergo effective sterilization. Extending the residence time of the sludge inside the equipment leads to low recycling efficiency.

[0005] Therefore, a multi-stage sludge treatment device is now being designed to improve the quality and efficiency of sludge recycling and address these shortcomings. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a multi-stage sludge treatment device that solves the problem of low disinfection and sterilization quality during existing sludge recycling processes.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a multi-stage sludge treatment device, including a stirring and pelletizing mechanism, the stirring and pelletizing mechanism including an equipment box, a drying trough being provided at the bottom inside the equipment box, a storage trough and a transfer trough being provided on both sides inside the equipment box and at the top of the drying trough, a hopper frame communicating with the drying trough being fixedly connected to the bottom of the inner cavity of the transfer trough through an opening, and a drying maintenance mechanism being installed on the inner side of the drying trough;

[0008] A notched elongated cylinder is fixedly connected to the left side of the equipment box through an opening. The right end of the notched elongated cylinder passes through the storage trough and the hopper frame in sequence and extends to the inner side of the hopper frame. A horizontal rotating rod is rotatably connected to the left side of the notched elongated cylinder through an opening. The right end of the horizontal rotating rod passes through the horizontal rotating rod and the equipment box in sequence and extends to the right side of the equipment box. A screw conveyor blade is fixedly connected to the surface of the horizontal rotating rod and located inside the notched elongated cylinder. Several circular outlet holes are opened at the right end of the notched elongated cylinder. A cutting blade that mates with the circular outlet holes is fixedly connected to the surface of the horizontal rotating rod and located inside the transfer trough. The cutting blade is in contact with the right end of the notched elongated cylinder.

[0009] Preferably, a vertical rotating rod is rotatably connected to the left side of the equipment box via a bearing component. Meshing bevel gears are fixedly connected to the surface of the vertical rotating rod and the left end of the horizontal rotating rod. A polygonal rotating rod is rotatably connected to the right side of the drying tank cavity via an opening. The polygonal rotating rod and the horizontal rotating rod are connected by a first belt and a first pulley. A lifting port is provided at the bottom of the drying tank cavity. Several electric heating rods are fixedly installed on the front and rear sides of the bottom of the equipment box cavity. A stirring drum for use with a storage tank is fixedly installed on the left side of the top of the equipment box.

[0010] Preferably, a top plate frame is fixedly connected to the left side of the top of the equipment box via a bracket, and the top end of the vertical rotating rod is rotatably connected to the bottom of the top plate frame via a bearing. A second pulley is fixedly connected to the surface of the vertical rotating rod, and an inner polygonal pulley is rotatably connected to the right side of the bottom of the top plate frame via a bearing. The second pulley and the inner polygonal pulley are connected by a second belt drive.

[0011] Preferably, a storage frame is fixedly connected to the top of the top plate frame via a fixing plate, and a discharge cone is fixedly connected to the bottom of the storage frame via an opening. Several discharge cones are provided. A limit rod is slidably installed at the bottom of the inner cavity of the storage frame via an opening. A curved plate is fixedly connected between the top ends of two limit rods and located inside the storage frame. A sealing block that cooperates with the discharge cone is fixedly connected to the bottom of the curved plate via a bracket. The sealing block is located inside the discharge cone. A first semi-circular block is fixedly connected to the bottom of the limit rod via a fixing plate.

[0012] Preferably, a conical tray is provided on the inner side of the mixing drum, and a hexagonal rotating rod is rotatably connected to the top of the conical tray via a bearing. A stirring blade is fixedly connected to the surface of the hexagonal rotating rod, and a second semicircular block that cooperates with the first semicircular block is fixedly connected to the lower part of the surface of the hexagonal rotating rod via a fixing plate. Several stirring blades are provided. The top of the hexagonal rotating rod passes through the inner polygonal pulley and the top plate frame and extends to the upper part of the mixing drum. The hexagonal rotating rod is slidably connected to the inner polygonal pulley and the top plate frame. A motor is fixedly connected to the top of the hexagonal rotating rod via a coupling. Support rods that cooperate with U-shaped pressure plates are fixedly connected to the surface and both sides of the rear of the equipment box.

[0013] Preferably, an annular bracket is fixedly connected to the surface of the motor, and a guide frame is fixedly connected to the top of the mixing drum.

[0014] Preferably, the drying and maintenance mechanism includes a cylinder, which is fixedly installed on the right side of the equipment box by a fixing plate. A U-shaped pressure plate is fixedly connected to the bottom end of the cylinder. Long pull rods are fixedly connected to the front and rear sides of the top of the U-shaped pressure plate by openings, and the top end of the long pull rods is fixedly connected to the bottom of the annular bracket.

[0015] Preferably, a sealing base plate is provided on the inner side of the lifting port. A U-shaped frame is fixedly connected to the front and rear parts of the bottom left side of the sealing base plate. A first rotating rod is slidably connected to the inner side of the U-shaped frame. The bottom ends of the two long pull rods are rotatably connected to the two ends of the first rotating rod through bearing components. A second rotating rod is rotatably connected to the bottom right side of the sealing base plate through bearing components. Both ends of the second rotating rod are fixedly connected to short pull rods through fixing blocks. A sliding sleeve plate is fixedly connected to the top of the short pull rod, and the sliding sleeve plate is slidably installed on the surface of the long pull rod.

[0016] Preferably, a first bearing seat is fixedly connected to both sides of the top of the sealing base plate, and a lower mesh frame is rotatably connected to the inner side of the first bearing seat. A second bearing seat is fixedly connected to both sides of the inner cavity between the front and rear parts of the drying tank through a bracket. A net frame that cooperates with the lower mesh frame is rotatably connected to the inner side of the second bearing seat. A half-angle frame that cooperates with the multi-angle rotating rod is fixedly connected to the right end of both the lower mesh frame and the net frame.

[0017] Preferably, the top of the mesh frame is provided with a feeding port that cooperates with the hopper frame, and a push block is fixedly connected to the surface of the long pull rod.

[0018] This invention provides a multi-stage sludge treatment device. Compared with existing technologies, it has the following advantages:

[0019] (1) The multi-stage sludge treatment device combines the mixing and pelletizing mechanism with the drying and maintenance mechanism. Before the sludge is dried at high temperature, it can be pre-mixed with lime powder inside the mixing drum. The reaction between lime powder and water is used to disinfect and dry the sludge for the first time. Then, the sludge is transported by the cylinder and cut into small pieces. Finally, the drying and subsequent efficiency are completed by the cooperation between the structures. This effectively improves the quality and efficiency of sludge recycling and treatment and meets the current needs.

[0020] (2) The multi-stage sludge treatment device has a storage frame installed on the top of the top plate frame and several discharge cones installed at the bottom of the storage frame. It is used in conjunction with the first semicircular block, the second semicircular block and the sealing block. The structure can allow the second semicircular block to indirectly and continuously push the first semicircular block while the stirring blades are stirring the sludge. This allows the sealing block to open and allow a small amount of lime powder to be indirectly sprinkled into the sludge. Then, it can be fully mixed with the sludge, achieving the purpose of pre-sterilization and drying. This not only reduces the subsequent drying time but also improves the drying efficiency and sterilization quality.

[0021] (3) The sludge multi-stage treatment device is used by opening a round outlet hole at the right end of the concave long cylinder and using a cutting blade. The structure allows the auger blade to transport the sludge while extruding it in a long strip shape through the round outlet hole. Then, the cutting blade directly cuts it into small pieces, thereby increasing the drying area and efficiency during drying. It also facilitates loading after drying.

[0022] (4) The multi-stage sludge treatment device is equipped with a lower mesh frame and a top mesh frame inside the drying tank, and is used in conjunction with a U-shaped frame, a first rotating rod and a second rotating rod. After the sludge is mixed and dried, the cylinder is started to allow the sealing bottom plate to support the lower mesh frame to descend, while the sludge inside the mixing drum is transferred to the inside of the storage tank. After the lower mesh frame is descended, the second rotating rod is used to rotate and tilt the lower mesh frame to discharge the material. The lower mesh frame and the top mesh frame are opened, which makes it convenient for the staff to maintain and repair them, and facilitates their use. At the same time, after the sealing bottom plate is raised, the half-angle frame can be closed and connected with the multi-angle rotating rod to ensure the stability during subsequent operation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a rear view of the stirring and pelletizing mechanism structure of the present invention;

[0025] Figure 3 This is a cross-sectional view of the equipment box structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the second semicircular block, the annular bracket, and the motor structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the top plate frame, the second pulley, and the inner polygonal pulley structure of the present invention;

[0028] Figure 6 This is a cross-sectional view of the storage frame structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the conical tray, hexagonal rotating rod, and stirring blade structure of the present invention;

[0030] Figure 8 This is a side view of the internal structure of the equipment box of the present invention;

[0031] Figure 9 For the present invention Figure 8 A magnified view of a section at point A in the middle;

[0032] Figure 10 This is a schematic diagram of the drying and maintenance mechanism structure of the present invention;

[0033] Figure 11 This is a schematic diagram of the structure of the half-angle frame, long tie rod, and push block of the present invention;

[0034] Figure 12 This is a bottom view of the sealing base plate, the U-shaped frame, and the first rotating rod structure of the present invention;

[0035] Figure 13 This is a schematic diagram of the wire mesh frame, feeding port, and half-angle frame structure of the present invention.

[0036] In the diagram: 1. Mixing and pelletizing mechanism; 2. Drying and maintenance mechanism; 101. Equipment box; 102. Drying tank; 103. Storage tank; 104. Transfer trough; 105. Hopper frame; 106. Notched long cylinder; 107. Horizontal rotating rod; 108. Screwdriver blade; 109. Circular outlet hole; 110. Cutting blade; 111. Vertical rotating rod; 112. Bevel gear; 113. Polygonal rotating rod; 114. First belt; 115. First pulley; 116. Mixing drum; 117. Lifting port; 118. Electric heating rod; 119. Top plate frame; 120. Second pulley; 121. Inner polygonal pulley; 122. Second belt; 123. Storage frame; 124. Discharge cone; 125. 126. Limiting rod; 127. Bent plate; 128. Sealing block; 129. First semicircular block; 130. Conical tray; 131. Hexagonal rotating rod; 132. Stirring blade; 133. Second semicircular block; 134. Annular bracket; 135. Guide frame; 136. Motor; 137. Support rod; 201. Cylinder; 202. U-shaped pressure plate; 203. Sealing base plate; 204. U-shaped frame; 205. First rotating rod; 206. Second rotating rod; 207. Short pull rod; 208. Sliding sleeve plate; 209. First bearing seat; 210. Second bearing seat; 211. Lower mesh frame; 212. Upper mesh frame; 213. Feed port; 214. Half-angle frame; 215. Long pull rod; 216. Push block. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figure 1-13 The present invention provides a technical solution: a multi-stage sludge treatment device, including a stirring and pelletizing mechanism 1;

[0039] Please refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10The overall structure of the mixing and pelletizing mechanism 1 is shown. The mixing and pelletizing mechanism 1 includes an equipment box 101. A drying trough 102 is provided at the bottom inside the equipment box 101. A storage trough 103 and a transfer trough 104 are respectively provided on both sides inside the equipment box 101 and at the top of the drying trough 102. A hopper frame 105 communicating with the drying trough 102 is fixedly connected to the bottom of the inner cavity of the transfer trough 104 through an opening. A drying and maintenance mechanism 2 is installed on the inner side of the drying trough 102.

[0040] A recessed elongated cylinder 106 is fixedly connected to the left side of the equipment box 101 through an opening. A sludge feeding slot is provided at the top of the recessed elongated cylinder 106, inside the storage trough 103. The right end of the recessed elongated cylinder 106 passes through the storage trough 103 and the hopper frame 105, extending to the inside of the hopper frame 105. A horizontal rotating rod 107 is rotatably connected to the left side of the recessed elongated cylinder 106 through an opening. The right end of the horizontal rotating rod 107 passes through the horizontal rotating rod 107 and the equipment box 101, extending to the right side of the equipment box 101. An auger blade 108 is fixedly connected to the surface of the horizontal rotating rod 107, inside the recessed elongated cylinder 106. Several circular outlet holes 109 are provided at the right end of the recessed elongated cylinder 106. A cutting blade 1, which mates with the circular outlet holes 109, is fixedly connected to the surface of the horizontal rotating rod 107, inside the transfer trough 104. 10, and the cutting blade 110 is attached to the right end of the concave long cylinder 106. The left side of the equipment box 101 is rotatably connected to the vertical rotating rod 111 via bearing components. The surface of the vertical rotating rod 111 and the left end of the horizontal rotating rod 107 are both fixedly connected to meshing bevel gears 112. The right side of the inner cavity of the drying tank 102 is rotatably connected to the polygonal rotating rod 113 through an opening. The polygonal rotating rod 113 and the horizontal rotating rod 107 are connected by a first belt 114 and a first pulley 115. The bottom of the inner cavity of the drying tank 102 is provided with a lifting port 117. Electric heating rods 118 are fixedly installed on the front and rear sides of the bottom of the inner cavity of the equipment box 101, and several electric heating rods 118 are provided. The left side of the top of the equipment box 101 is fixedly installed with The mixing drum 116, used in conjunction with the storage tank 103, has a top plate frame 119 fixedly connected to the left side of the top of the equipment box 101 via a bracket. The top end of the vertical rotating rod 111 is rotatably connected to the bottom of the top plate frame 119 via a bearing. A second pulley 120 is fixedly connected to the surface of the vertical rotating rod 111. An inner polygonal pulley 121 is rotatably connected to the right side of the bottom of the top plate frame 119 via a bearing. The second pulley 120 and the inner polygonal pulley 121 are connected by a second belt 122. A storage frame 123 is fixedly connected to the top of the top plate frame 119 via a fixing plate. A discharge cone 124 is fixedly connected to the bottom of the storage frame 123 through an opening. Several discharge cones 124 are provided. 3. A limiting rod 125 is slidably installed at the bottom of the inner cavity through an opening. A curved plate 126 is fixedly connected between the tops of the two limiting rods 125 and inside the storage frame 123. A sealing block 127 for use with the discharge cone 124 is fixedly connected to the bottom of the curved plate 126 through a bracket. The sealing block 127 is conical and made of hard rubber, and is located inside the discharge cone 124. A first semi-circular block 128 is fixedly connected to the bottom of the limiting rod 125 through a fixing plate. A conical tray 129 is provided inside the mixing drum 116. A hexagonal rotating rod 130 is rotatably connected to the top of the conical tray 129 through a bearing. A stirring blade 131 is fixedly connected to the surface of the hexagonal rotating rod 130.The lower part of the surface of the hexagonal rotating rod 130 is fixedly connected to a second semicircular block 132, which cooperates with the first semicircular block 128, via a fixing plate. Several stirring blades 131 are provided. The top of the hexagonal rotating rod 130 passes through the inner polygonal pulley 121 and the top plate frame 119, extending to the upper part of the stirring drum 116. The hexagonal rotating rod 130 is slidably connected to the inner polygonal pulley 121 and the top plate frame 119. The top of the hexagonal rotating rod 130 is fixedly connected to a motor 135 via a coupling. The motor 135 is a servo motor. Support rods 136, which cooperate with the U-shaped pressure plate 202, are fixedly connected to the surface and rear sides of the equipment box 101. An annular bracket 133 is fixedly connected to the surface of the motor 135. A guide frame 134 is fixedly connected to the top of the stirring drum 116.

[0041] Before use, quicklime is placed inside the storage frame 123. Then, sludge is poured into the mixing drum 116 using the guide frame 134. The motor 135 and several electric heating rods 118 are then started. The starting of the electric heating rods 118 heats the interior of the drying tank 102. When the motor 135 starts, the hexagonal rotating rod 130 drives the mixing blades 131 and the second semicircular block 132 to rotate. The rotating mixing blades 131 stir the sludge. Simultaneously, each time the second semicircular block 132 rotates and contacts the first semicircular block 128, the first semicircular block 128 is agitated by the second semicircular block 128. The semicircular block 132 is lifted, and the first semicircular block 128, under the limit of the limiting rod 125, drives the curved plate 126 and several sealing blocks 127 to rise simultaneously, no longer blocking the feeding cone 124. Then, the quicklime inside the storage frame 123 is sprinkled out from the bottom of the feeding cone 124 into the sludge. The quicklime reacts with the sludge and generates a high temperature. In this step, the quicklime is used to disinfect the sludge. At the same time, the heat reaction with the sludge causes some of the water to evaporate, making the sludge solid. After the sterilization and stirring are completed, the cylinder 201 is started to press the U-shaped pressure. Plate 202, via long tie rod 215, drives motor 135, hexagonal rotating rod 130, and conical tray 129 to descend as a whole to the inside of storage tank 103. During this process, the inner polygonal pulley 121 is limited by the top plate frame 119 and will not be driven. After the conical tray 129 is inside the storage tank 103, the sludge inside the mixing drum 116 falls from the bottom into the storage tank 103. Then, cylinder 201 starts, driving the conical tray 129 to rise back to the inside of the mixing drum 116. Then, sludge continues to be poured into the inside of the mixing drum 116, and motor 135 is started for mixing. When the angle rotating rod 130 rotates, the second pulley 120, the inner polygonal pulley 121, the top plate frame 119, the vertical rotating rod 111, and the bevel gear 112 drive the horizontal rotating rod 107 and the auger blade 108 to rotate synchronously. The rotating auger blade 108 transports the sludge inside the storage tank 103 through the concave long cylinder 106. When the sludge is transported to the rightmost side of the concave long cylinder 106, it is squeezed out from the circular outlet 109 by the extrusion pressure. Then, the horizontal rotating rod 107 drives the rotating cutting blade 110 to cut it into blocks, and then the sludge blocks fall into the inside of the hopper frame 105.

[0042] Please refer to Figure 10 , Figure 11 , Figure 12 and Figure 13The diagram illustrates the overall structure of the drying and maintenance mechanism 2. The mechanism includes a cylinder 201, which is fixedly mounted on the right side of the equipment box 101 via a fixing plate. A U-shaped pressure plate 202 is fixedly connected to the bottom of the cylinder 201. Long pull rods 215 are fixedly connected to the front and rear sides of the top of the U-shaped pressure plate 202 through openings. The top of the long pull rods 215 is fixedly connected to the bottom of the annular bracket 133. A sealing base plate 203 is provided inside the lifting port 117. A U-shaped frame 204 is fixedly connected to the front and rear parts of the left side of the bottom of the sealing base plate 203. A first rotating rod 205 is slidably connected to the inner side of the U-shaped frame 204. The bottom ends of the two long pull rods 215 are rotatably connected to the two ends of the first rotating rod 205 via bearing components. A second rotating rod 206 is rotatably connected to the right side of the bottom of the sealing base plate 203 via bearing components. Both ends are fixedly connected to short pull rods 207 by fixing blocks. The top of the short pull rods 207 is fixedly connected to a sliding sleeve plate 208, and the sliding sleeve plate 208 is slidably installed on the surface of the long pull rod 215. The top two sides of the sealing base plate 203 are fixedly connected to the first bearing seats 209. The inner side of the first bearing seats 209 is rotatably connected to the lower mesh frame 211. The two sides between the front and rear of the inner cavity of the drying tank 102 are fixedly connected to the second bearing seats 210 by brackets. The inner side of the second bearing seats 210 is rotatably connected to the upper mesh frame 212 that cooperates with the lower mesh frame 211. The right ends of the lower mesh frame 211 and the upper mesh frame 212 are fixedly connected to the half-angle frame 214 that cooperates with the multi-angle rotating rod 113. The top of the upper mesh frame 212 is provided with a feeding port 213 that cooperates with the hopper frame 105. The surface of the long pull rod 215 is fixedly connected to a push block 216.

[0043] Simultaneously, the multi-angle rotating rod 113, driven by the first belt 114 and the first pulley 115, drives the lower mesh frame 211 and the upper mesh frame 212 to rotate as a whole. Each time the feeding port 213 rotates to the top and connects with the hopper frame 105, the mud inside the hopper frame 105 falls to the inside of the lower mesh frame 211 and the upper mesh frame 212. At the same time, the electric heating rod 118 performs high-temperature drying, and the rotating lower mesh frame 211 and the upper mesh frame 212 cause the mud to tumble and undergo uniform drying and dehydration. After dehydration is completed, the mud inside the mixing drum 116 is also dried. Stirring is then initiated, followed by the activation of cylinder 201, which pushes and lowers the long pull rod 215. The descent of the long pull rod 215 utilizes the support of the U-shaped pressure plate 202 by the thrust block 216 to lower the sealing base plate 203 as a whole. This descent of the sealing base plate 203 causes the lower mesh frame 211 to separate from the upper mesh frame 212, and simultaneously, the two half-angle frames 214 separate from the multi-angle rotating rod 113. Once the lower mesh frame 211 is completely at the bottom of the equipment box 101, the sliding sleeve plate 208 rests on the top of the support rod 136, preventing the short pull rod 207 from descending. However, the long pull rod 215 continues to descend under the sliding action of the push block 216. At this time, the long pull rod 215 pushes the first rotating rod 205 to slide inside the return frame 204 and drives the sealing bottom plate 203 to rotate and tilt under the action of the second rotating rod 206. After the lower mesh frame 211 completes tilting, the mud inside slides down and is discharged. After the discharge is completed, the cylinder 201 is restarted to make the U-shaped pressure plate 202 pull the long pull rod 215 up. The rise of the long pull rod 215 causes the first rotating rod 205 to drive the sealing bottom plate 203 under the guidance of the return frame 204. The slide plate 208 is rotated to a balanced state, and the push block 216 contacts the bottom of the sliding plate 208. As the long pull rod 215 continues to rise, the push block 216 will support the sliding plate 208 and pull the short pull rod 207 and the entire sealing base plate 203 to rise synchronously. After the cylinder 201 is fully retracted, the sealing base plate 203 is sealed and fitted with the lifting port 117. At the same time, the lower mesh frame 211 and the upper mesh frame 212 are also connected. The two half-angle frames 214 are combined into a whole and wrap around the multi-angle rotating rod 113. Then the motor 135 is started to transfer and cut sludge again.

[0044] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A multi-stage sludge treatment device, comprising a mixing and pelletizing mechanism (1), characterized in that: The mixing and pelletizing mechanism (1) includes an equipment box (101). A drying trough (102) is provided at the bottom inside the equipment box (101). A storage trough (103) and a transfer trough (104) are respectively provided on both sides inside the equipment box (101) and at the top of the drying trough (102). A hopper frame (105) communicating with the drying trough (102) is fixedly connected to the bottom of the inner cavity of the transfer trough (104) through an opening. A drying maintenance mechanism (2) is installed on the inner side of the drying trough (102). A notched elongated cylinder (106) is fixedly connected to the left side of the equipment box (101) through an opening. The right end of the notched elongated cylinder (106) passes through the storage trough (103) and the hopper frame (105) in sequence and extends to the inside of the hopper frame (105). A horizontal rotating rod (107) is rotatably connected to the left side of the notched elongated cylinder (106) through an opening. The right end of the horizontal rotating rod (107) passes through the horizontal rotating rod (107) and the equipment box (101) in sequence and extends to the inside of the equipment box (105). On the right side of 1), a screw conveyor blade (108) is fixedly connected to the surface of the horizontal rotating rod (107) and inside the concave long cylinder (106). Several round holes (109) are opened at the right end of the concave long cylinder (106). A cutting blade (110) that cooperates with the round holes (109) is fixedly connected to the surface of the horizontal rotating rod (107) and inside the transfer groove (104). The cutting blade (110) is in contact with the right end of the concave long cylinder (106). A vertical rotating rod (111) is rotatably connected to the left side of the equipment box (101) via a bearing. The surface of the vertical rotating rod (111) and the left end of the horizontal rotating rod (107) are both fixedly connected to meshing bevel gears (112). A polygonal rotating rod (113) is rotatably connected to the right side of the inner cavity of the drying tank (102) via an opening. The polygonal rotating rod (113) and the horizontal rotating rod (107) are connected by a first belt (114) and a first pulley (115). A lifting port (117) is provided at the bottom of the inner cavity of the drying tank (102). Electric heating rods (118) are fixedly installed on the front and rear sides of the bottom of the inner cavity of the equipment box (101), and there are several electric heating rods (118). A stirring drum (116) for use with the storage tank (103) is fixedly installed on the left side of the top of the equipment box (101). The top left side of the equipment box (101) is fixedly connected to the top plate frame (119) by a bracket, and the top end of the vertical rotating rod (111) is rotatably connected to the bottom of the top plate frame (119) by a bearing. The surface of the vertical rotating rod (111) is fixedly connected to the second pulley (120), and the bottom right side of the top plate frame (119) is rotatably connected to the inner polygonal pulley (121) by a bearing. The second pulley (120) and the inner polygonal pulley (121) are connected by a second belt (122). The top of the top plate frame (119) is fixedly connected to a storage frame (123) by a fixing plate. The bottom of the storage frame (123) is fixedly connected to a discharge cone (124) by an opening. There are several discharge cones (124). The bottom of the inner cavity of the storage frame (123) is slidably installed with a limit rod (125) by an opening. A curved plate (126) is fixedly connected between the tops of the two limit rods (125) and inside the storage frame (123). The bottom of the curved plate (126) is fixedly connected to a sealing block (127) that cooperates with the discharge cone (124) by a bracket. The sealing block (127) is located inside the discharge cone (124). The bottom of the limit rod (125) is fixedly connected to a first semicircular block (128) by a fixing plate. The inner side of the stirring drum (116) is provided with a conical tray (129). The top of the conical tray (129) is rotatably connected to a hexagonal rotating rod (130) via a bearing. A stirring blade (131) is fixedly connected to the surface of the hexagonal rotating rod (130). The lower part of the surface of the hexagonal rotating rod (130) is fixedly connected to a second semicircular block (132) that cooperates with the first semicircular block (128) via a fixing plate. Several stirring blades (131) are provided. The top of the hexagonal rotating rod (130) passes through the inner polygonal pulley (121) and the top plate frame (119) and extends to the upper part of the mixing drum (116). The hexagonal rotating rod (130) is slidably connected to the inner polygonal pulley (121) and the top plate frame (119). The top of the hexagonal rotating rod (130) is fixedly connected to a motor (135) through a coupling. The surface and rear sides of the equipment box (101) are fixedly connected to support rods (136) that cooperate with the U-shaped pressure plate (202).

2. The sludge multi-stage treatment device according to claim 1, characterized in that: The surface of the motor (135) is fixedly connected to an annular bracket (133), and the top of the stirring drum (116) is fixedly connected to a guide frame (134).

3. The sludge multi-stage treatment device according to claim 2, characterized in that: The drying and maintenance mechanism (2) includes a cylinder (201), and the cylinder (201) is fixedly installed on the right side of the equipment box (101) by a fixing plate. A U-shaped pressure plate (202) is fixedly connected to the bottom end of the cylinder (201). A long pull rod (215) is fixedly connected to the front and rear sides of the top of the U-shaped pressure plate (202) by opening. The top end of the long pull rod (215) is fixedly connected to the bottom of the ring bracket (133).

4. The sludge multi-stage treatment device according to claim 3, characterized in that: A sealing base plate (203) is provided on the inner side of the lifting port (117). A U-shaped frame (204) is fixedly connected to the front and rear parts of the bottom left side of the sealing base plate (203). A first rotating rod (205) is slidably connected to the inner side of the U-shaped frame (204). The bottom ends of the two long pull rods (215) are rotatably connected to the two ends of the first rotating rod (205) through bearing components. A second rotating rod (206) is rotatably connected to the right side of the bottom of the sealing base plate (203) through bearing components. Short pull rods (207) are fixedly connected to both ends of the second rotating rod (206) through fixing blocks. A sliding sleeve plate (208) is fixedly connected to the top end of the short pull rod (207), and the sliding sleeve plate (208) is slidably installed on the surface of the long pull rod (215).

5. A multi-stage sludge treatment device according to claim 4, characterized in that: The top two sides of the sealing base plate (203) are fixedly connected to the first bearing seat (209), and the inner side of the first bearing seat (209) is rotatably connected to the lower wire mesh frame (211). The two sides between the front and rear of the inner cavity of the drying tank (102) are fixedly connected to the second bearing seat (210) by the bracket. The inner side of the second bearing seat (210) is rotatably connected to the upper wire mesh frame (212) that cooperates with the lower wire mesh frame (211). The right ends of the lower wire mesh frame (211) and the upper wire mesh frame (212) are fixedly connected to the half-angle frame (214) that cooperates with the multi-angle rotating rod (113).

6. The sludge multi-stage treatment device according to claim 5, characterized in that: The top of the mesh frame (212) is provided with a feeding port (213) that is used in conjunction with the hopper frame (105), and a push block (216) is fixedly connected to the surface of the long pull rod (215).

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