High-moisture sludge drying device

Abstract

The utility model relates to the field of solid waste treatment and provides a high-moisture sludge drying device. Comprising a combustion engine, a combustion furnace and a drying furnace, a smoke non-return cavity is formed between the combustion furnace and the drying furnace, the two ends of the smoke non-return cavity are connected with the combustion furnace and the drying furnace in a sealed mode respectively, a pair of vertical sealing frames is arranged in the middle of a cavity body of the smoke non-return cavity, and a gate plate is inserted between the sealing frames; a door frame and a winch are installed on the outer side of the smoke non-return cavity, a pulley is installed on the door frame, and a steel rope of the winch penetrates through the pulley to be connected with a lifting lug in the center of the top of the gate plate. High-temperature hot air is input into the drying furnace under the control of the smoke non-return cavity and can be blocked through the gate when fire breaks out in the drying furnace or smoke is large, the sludge is promoted to roll through the internal rotary rake structure while the drying furnace rotates, and the drying efficiency is improved. Feeding and discharging of the drying furnace are achieved through the conveying device, and the requirement for large-scale continuous production can be met.

Description

Technical Field

[0001] This utility model relates to the field of solid waste treatment, specifically to a high-moisture sludge drying device. Background Technology

[0002] In the field of industrial solid waste treatment, solid waste containing heavy metals is generally treated by melting. The heavy metals in the solid waste are melted to form solid oxides, which are then recovered and further purified to obtain metals of a certain purity. Since most solid waste originates from pre-treated sludge or sediment, and contains a certain amount of moisture, the moisture needs to be dried before entering the melting furnace. At the same time, the combustible organic matter in the waste needs to be incinerated to ensure the treatment and recovery effect in the melting furnace.

[0003] Existing drying equipment typically uses a jacketed heat exchanger to feed solid waste into the drying unit. The moisture in the solid waste is then dried using a stirring device within the unit and hot water in the jacket. However, this method has low drying efficiency due to insufficient drying temperature. Some methods use a burner to heat the drying unit, but because the solid waste contains organic matter, flames and large amounts of flue gas are easily generated during the drying process. These flames or flue gas can also backflow from the drying unit to the burner, posing a safety hazard. Summary of the Invention

[0004] To ensure the drying efficiency of water-containing sludge, meet the requirements of mass production, and improve the safety of the drying process, this utility model provides a high-moisture sludge drying device.

[0005] The technical solution adopted by this utility model is as follows:

[0006] A high-moisture sludge drying device includes a burner, a combustion furnace, and a drying furnace. The burner is installed at one end of the combustion furnace, and the other end of the combustion furnace is connected to the drying furnace. A feeding device is connected to the end of the drying furnace near the combustion furnace. An air outlet and a discharge hopper are respectively provided at the top and bottom of the end of the drying furnace away from the combustion furnace. A flue gas check chamber is installed between the combustion furnace and the drying furnace. The flue gas check chamber is a rectangular cavity. Both ends of the flue gas check chamber are sealed to the combustion furnace and the drying furnace, respectively. A pair of vertical sealing frames are provided in the middle of the flue gas check chamber. A gate is inserted between the pair of sealing frames. The four edges of the gate are sealed to the sealing frames. A gantry and a winch are installed on the outside of the flue gas check chamber. A pulley is installed on the gantry. The steel rope of the winch passes through the pulley and is connected to the lifting lug at the center of the top of the gate.

[0007] Furthermore, the feeding device includes a distribution hopper, a dispersing machine is installed at the bottom outlet of the distribution hopper, a chain plate feeder is installed below the dispersing machine, the output end of the chain plate feeder is connected to a screw feeder, and the end of the screw feeder is connected to the feed inlet of the drying oven.

[0008] Furthermore, the drying oven includes end plates on both sides and a rotary furnace body in the middle. The rotary furnace body is a horizontal cylindrical furnace body. A gear ring is installed on the outer side of the middle part of the rotary furnace body. The two ends of the rotary furnace body are supported by a rotating support. The gear ring meshes with the gear of the reduction device for transmission.

[0009] Furthermore, the rotating support consists of rotating rollers distributed on both sides of the width of the rotary kiln body.

[0010] Furthermore, a rotary rake structure is installed inside the drying oven. The rotary rake includes a rotating shaft and rake blades spirally distributed along its length on the rotating shaft. The two ends of the rotating shaft are rotatably supported by bearings on the two end plates of the drying oven. A speed reducer is installed on the end plate on the side away from the combustion furnace, and the rotating shaft is connected to the speed reducer.

[0011] Furthermore, a discharge conveyor belt is provided directly below the discharge hopper.

[0012] Furthermore, the burner is a natural gas burner.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0014] The sludge is dried by using high-temperature hot air generated by a burner and furnace. This hot air is controlled by a flue gas check chamber, allowing for the containment of fire or excessive smoke through a gate to prevent damage to the furnace. As the furnace rotates, an internal swirl rake structure promotes sludge tumbling, improving drying efficiency. Both feeding and discharging of the sludge are achieved via a conveyor system, meeting the requirements of large-scale continuous production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the feeding device.

[0017] In the diagram: 1. Burner; 2. Combustion furnace; 3. Flue gas check chamber; 31. Sealing frame; 32. Gate; 33. Gantry; 34. Winch; 35. Pulley; 4. Feeding device; 5. Drying oven; 5. Fixed end plate; 51. Rotary furnace body; 52. Gear ring; 53. Rotary support; 54. Speed ​​reduction device; 55. Discharge device; 6. Rotary rake structure; 7. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0019] like Figure 1 As shown, a high-moisture sludge drying device comprises a burner 1, a combustion furnace 2, a flue gas check chamber 3, a feeding device 4, a drying furnace 5, and a discharging device 6. The burner 1 is a natural gas combustion device, installed on the end face of the combustion furnace 2. The burner head of the burner 1 is inserted into the combustion furnace 2 and sprays flames in multiple directions towards the front of the combustion furnace. The combustion furnace 2 is a sealed cavity used to generate a large amount of high-temperature gas for use in the drying furnace 5. The output end of the combustion furnace 2 is connected to the flue gas check chamber 3, which is a rectangular cavity. Both ends of the flue gas check chamber 3 are sealed to the combustion furnace 2 and the drying furnace 5, respectively. A pair of vertical sealing frames 31 are provided in the middle of the flue gas check chamber 3. The four side walls of the sealing frames 31 are sealed to the inner wall of the cavity. A gate 32 is inserted between the pair of sealing frames 31, with its four edges sealingly engaging with the sealing frames 31. When the gate 32 is fully inserted, it can isolate the flue gas passage of the flue gas check chamber 3. A gantry 33 and a winch 34 are installed on the outside of the flue gas check chamber 3. The gantry 33 is welded to the outer wall of the flue gas check chamber 3. The winch 34 is supported by a bracket on the side wall of the flue gas check chamber 3 or the end face of the drying oven 5. Multiple pulleys 35 are installed on the gantry 33. The steel rope of the winch 34 is connected to the lifting lug at the top center of the gate 32 after changing direction through the multiple pulleys 35. The winch 34 can realize the opening and closing of the gate 32 and the adjustment of the opening degree. In addition to realizing flue gas flame check, it can also regulate the flow rate of high-temperature gas entering the drying oven.

[0020] The drying oven 5 consists of fixed end plates 51 on both sides and a rotary furnace body 52 in the middle. The rotary furnace body 52 is connected to the end plates 51 by a rotary seal, and the flue gas check chamber 3 is connected to the inlet on the corresponding side end plate. The rotary furnace body 52 is a horizontal cylindrical furnace body. A gear ring 53 is installed on the outer side of the middle part of the rotary furnace body 52. ​​The two ends of the rotary furnace body 52 are supported by rotating supports 54. The gear ring 53 meshes with the gears of the reduction device 55 for transmission. The rotating supports 54 are rotating rollers distributed on both sides of the width direction of the rotary furnace body 52. ​​During the rotation of the rotary furnace body 52 driven by the reduction device 55, the sludge inside is tumbled, which facilitates the thorough drying of the sludge inside.

[0021] To improve drying efficiency, a rotary rake structure 7 is installed inside the drying oven. The rotary rake structure includes a rotating shaft and rake blades spirally distributed along the length of the rotating shaft. The two ends of the rotating shaft are rotatably supported by bearings on the two end plates of the drying oven. A speed reducer is installed on the end plate away from the combustion furnace. The speed reducer drives the rotating shaft to rotate coaxially and in the opposite direction to the rotary oven body, further breaking up the sludge and improving drying efficiency.

[0022] Moisture-containing sludge is fed into the drying furnace from one end through the feeding device 4. The feeding device includes a distribution hopper 41 for receiving the material. A disperser 42 is installed at the bottom outlet of the distribution hopper 41 to initially disperse the material for easier feeding. A chain feeder 43 is installed below the disperser 42. The dispersed material is transported upwards by the chain feeder 43 and fed into the feed hopper of the screw feeder 44. The end of the screw feeder 44 is connected to the feed inlet of the drying furnace 5, and the screw feeder 44 is sealed to the feed inlet. After drying, the sludge is discharged from the discharge device 6 at the bottom of the dryer. The discharge device 6 is a discharge conveyor belt directly below the drying furnace 5, which transports the sludge to the subsequent crushing station.

Claims

1. A high-moisture sludge drying device, comprising a burner, a combustion furnace, and a drying furnace, wherein the burner is installed at one end of the combustion furnace, and the other end of the combustion furnace is connected to the drying furnace, characterized in that, The drying oven is connected to a feeding device at the end near the combustion furnace. An air outlet and a discharge hopper are respectively located at the top and bottom of the end of the drying oven away from the combustion furnace. A flue gas check chamber is installed between the combustion furnace and the drying oven. The flue gas check chamber is a rectangular cavity with both ends sealed to the combustion furnace and the drying oven, respectively. A pair of vertical sealing frames are located in the middle of the flue gas check chamber, and a gate is inserted between the two sealing frames. The four edges of the gate are sealed to the sealing frames. A gantry and a winch are installed on the outside of the flue gas check chamber. A pulley is installed on the gantry, and the steel rope of the winch passes through the pulley and connects to the lifting lug at the center of the top of the gate.

2. The high-moisture sludge drying device according to claim 1, characterized in that, The feeding device includes a distribution hopper, a dispersing machine is installed at the bottom outlet of the distribution hopper, a chain plate feeder is installed below the dispersing machine, the output end of the chain plate feeder is connected to a screw feeder, and the end of the screw feeder is connected to the feed inlet of the drying oven.

3. The high-moisture sludge drying device according to claim 1, characterized in that, The drying oven includes end plates on both sides and a rotary furnace body in the middle. The rotary furnace body is a horizontal cylindrical furnace body. A toothed ring is installed on the outer side of the middle part of the rotary furnace body. The two ends of the rotary furnace body are supported by a rotating support. The toothed ring meshes with the gear of the reduction device for transmission.

4. The high-moisture sludge drying device according to claim 3, characterized in that, The rotating support consists of rotating rollers distributed on both sides of the width of the rotary kiln body.

5. A high-moisture sludge drying device according to claim 3, characterized in that, The drying oven is equipped with a rotary rake structure, which includes a rotating shaft and rake blades spirally distributed along the length of the rotating shaft. The two ends of the rotating shaft are rotatably supported by bearings on the two end plates of the drying oven. A speed reducer is installed on the end plate on the side away from the combustion furnace, and the rotating shaft is connected to the speed reducer.

6. The high-moisture sludge drying device according to claim 1, characterized in that, A discharge conveyor belt is located directly below the discharge hopper.

7. The high-moisture sludge drying device according to claim 1, characterized in that, The burner is a natural gas burner.

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