A kind of preparation equipment of fly ash ceramsite

Abstract

The present invention discloses a fly ash ceramsite production device, comprising a material storage device, a stirring device, a granulation device, and a baking device, which are sequentially connected. The stirring device comprises a cylinder and an agitator installed within the cylinder. The cylinder is provided with a jacket, the jacket having an air inlet, an exhaust port, and a drain port. The baking device comprises a rotary kiln having a preheating box and a roasting box. The air inlet of the jacket is connected to the roasting box via a pipeline, the exhaust port is connected to the preheating box via a pipeline, and the drain port is connected to the granulation device via a pipeline. The present invention provides a fly ash ceramsite production device that ensures uniform mixing of various materials, fully utilizes heat, and is energy-saving and environmentally friendly.

Description

Technical Field

[0001] The invention relates to a preparation device for fly ash ceramsite, belonging to the technical field of ceramsite production equipment. Background Art

[0002] Fly ash, a by-product of waste incineration, contains high levels of heavy metals and dioxins, and is therefore classified as hazardous waste. However, fly ash is also rich in components with potential utilization value, such as Al2O3, SiO2, K2O, Na2O, and CaO. These components allow the fly ash, after being treated with water and other methods, to be mixed with an appropriate amount of sludge in a certain proportion and then granulated and sintered to produce expanded clay for use in construction and gardening. In order to better mix the fly ash and sludge evenly, they need to be dried, crushed, and stirred. Drying requires a lot of heat, but the heat from the rotary kiln exhaust cannot be well utilized, resulting in energy waste. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a preparation device for fly ash ceramsite, which ensures uniform mixing of various materials, fully utilizes heat, is energy-saving and environmentally friendly, and can solve the shortcomings of the existing technology.

[0004] The technical solution of the present invention is: a preparation device for fly ash ceramsite, comprising a storage device, a stirring device, a granulating device, and a baking device connected in sequence, the stirring device comprising a cylinder and an agitator installed in the cylinder, a jacket is provided outside the cylinder, the jacket is provided with an air inlet, an exhaust port, and a drain port, the baking device comprises a rotary kiln with a preheating box and a roasting box, the air inlet of the jacket is connected to the roasting box through a pipeline, the exhaust port is connected to the preheating box through a pipeline, and the drain port is connected to the granulating device through a pipeline.

[0005] Furthermore, a spiral partition is provided between the jacket and the outer wall of the cylinder. The spiral partition separates the space between the jacket and the cylinder into a spiral channel. The air inlet is located at the lower position of the channel, and the exhaust port is located at the upper position of the channel.

[0006] Furthermore, the granulation device includes a granulator and a water supply device connected to the granulator, and the drain outlet is connected to the water supply device.

[0007] Furthermore, the stirrer includes a driver arranged at the top of the cylinder and a rotating shaft driven to rotate by the driver. The rotating shaft is inserted through the cylinder and vertically extends into the cylinder. A stirring blade and a blade are arranged on the rotating shaft.

[0008] Furthermore, a plurality of fixed blades are provided on the inner wall of the cylinder.

[0009] Furthermore, the fixed blade is L-shaped, comprising a longitudinal portion that fits against the inner wall of the cylinder and a transverse portion that extends toward the axis of the cylinder, and both sides of the transverse portion are serrated.

[0010] Furthermore, the blade is mounted on the bottom of the rotating shaft, and there is a gap between the blade and the transverse portion of the fixed blade.

[0011] Furthermore, the blade is slidably connected to the rotating shaft, and a matching limiting mechanism is provided between the blade and the rotating shaft. The blade can slide relative to the rotating shaft and rotate with the rotating shaft through the matching limiting mechanism. An elastic reset mechanism matching the blade is provided on the rotating shaft. The elastic reset mechanism includes an elastic member that applies a force to the blade. The blade is in an initial state with a specific gap with the fixed blade under the limitation of the limiting mechanism and the elastic reset mechanism. The blade slides relative to the rotating shaft under the action of external force to increase the gap. At this time, the elastic member further deforms to generate elastic force. After the external force is removed, the elastic force of the elastic member resets the blade to its initial state.

[0012] Furthermore, the elastic reset mechanism includes a limiter mounted on the rotating shaft, the elastic member is a spring, the spring is sleeved on the rotating shaft and located between the limiter and the blade, the blade has a ring on which the spring is sleeved, and the limiter is provided with a sliding fit with the ring.

[0013] Furthermore, the limiting member is threadedly connected to the rotating shaft, and the limiting member changes position by rotating to adjust the elastic force of the elastic member on the blade.

[0014] By implementing the present invention, the material for making ceramsite is stored in the storage device respectively, and the material is transported and weighed by a spiral metering scale to make the material enter the upper stirring device according to a certain proportion, and the material after stirring and mixing enters the granulating device for granulation, and the formed ceramsite semi-finished product enters the baking device for sintering to complete the firing of the ceramsite. The stirring device cylinder and the stirrer installed in the cylinder are provided with a jacket outside the cylinder, and the jacket is provided with an air inlet, an exhaust port and a drain port. The baking device includes a rotary kiln with a preheating box and a roasting box, and the air inlet of the jacket is connected to the pipe. It is connected to the roasting box, the exhaust port is connected to the preheating box through a pipeline, and the drain port is connected to the granulation device through a pipeline. The ceramsite semi-finished product is first preheated in the preheating box and then enters the roasting box for high-temperature baking. During the baking process, water vapor evaporates to generate high-temperature tail gas with a high water vapor content, which enters the jacket to heat the cylinder. The condensed water generated by the water vapor in the tail gas after cooling is supplied to the granulation device through the drain port, and the cooled tail gas returns to the preheating box through the exhaust port to preheat the ceramsite semi-finished product, thereby realizing full utilization of the heat and achieving energy saving and environmental protection effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the present invention;

[0016] Figure 2 Schematic diagram of a stirring device;

[0017] Figure 3 It is a schematic diagram of the stirring device;

[0018] Figure 4 is a cross-sectional view of the stirring device;

[0019] Figure 5 for Figure 4 Enlarged view of point A.

[0020] As shown in the figure: granulator 1; rotary kiln 2; storage bin 3; water supply tank 4; partition 5; spiral metering scale 6; annular groove 7; cylinder 8; jacket 9; rotating shaft 10; stirring blade 11; blade 12; fixed blade 13; cross section 14; connecting pipe 15; chute 16; elastic pad 17; limiter 18; spring 19; collar 20; air inlet 21; exhaust port 22; drain port 23; preheating box 24; roasting box 25; connecting pin 26. DETAILED DESCRIPTION

[0021] Embodiments of the present invention: Figures 1 to 5As shown, a preparation device for fly ash ceramsite comprises a storage device, a stirring device, a granulation device, and a baking device connected in sequence. The stirring device comprises a cylinder 8 and a stirrer installed in the cylinder 8. The cylinder 8 is provided with a jacket 9. The jacket 9 is provided with an air inlet 21, an exhaust port 22, and a drain port 23. The granulation device comprises a granulator 1 and a water supply tank 4 connected to the granulator 1. The drain port 23 is connected to the water supply tank 5. The storage device comprises a plurality of storage bins 3. The storage bins 3 are connected to the cylinder 8 respectively through a spiral metering scale 6. The materials for making ceramsite (fly ash, sludge, etc.) are stored separately, and the materials are transported and weighed by the spiral metering scale 6 to enter the cylinder 8 of the stirring device in a certain proportion. The stirrer in the cylinder 8 stirs and crushes it, and then enters the granulator 1 through the discharge port for granulation. The water supply tank 4 is filled with water for supplying water to the granulator. The baking device includes a rotary kiln 2 with a preheating box 24 and a roasting box 25. The preheating box 24 is located in front of the roasting box 25 and is connected to the roasting box 25. The air inlet 21 of the jacket 9 is connected to the roasting box 25 through a pipeline, and the exhaust is discharged. The port 22 is connected to the preheating box 24 through a pipeline. The ceramsite semi-finished product formed by the granulator 1 is first preheated in the preheating box 24 and then enters the roasting box 25 for high-temperature baking. During the baking process, water vapor evaporates and generates high-temperature tail gas with a high water vapor content. It enters the jacket 9 to heat the cylinder 8. The condensed water generated by the water vapor in the tail gas after cooling is supplied to the granulation device through the drain port 23. The tail gas after cooling is returned to the preheating box 24 through the exhaust port 22 to preheat the ceramsite semi-finished product. Since the high-temperature tail gas discharged from the roasting box 25 contains a large amount of water vapor, if it is directly When the material enters the cylinder 8 and is blown and dried, the moisture will be absorbed by the material and affect the drying effect. The material after cooling is easy to stick together. The present application heats by means of a jacket, and the moisture in the high-temperature exhaust gas will not be absorbed by the material, so that the material has a better drying effect. Moreover, the condensed water formed by the cooling after the high-temperature exhaust gas heats the cylinder 8 can be utilized by the granulating device. In addition, the exhaust gas after cooling enters the preheating box 24 of the rotary kiln 2 to preheat the ceramsite semi-finished product, which is not conducive to fully utilizing the heat, and because the moisture content is reduced, it has a better drying effect.

[0022] As a preferred embodiment, a spiral partition 5 is provided between the jacket 9 and the outer wall of the cylinder 8. The spiral partition 5 divides the space between the jacket 9 and the cylinder 8 into a spiral channel. The air inlet 21 is located at the lower position of the channel, and the exhaust port 22 is located at the upper position of the channel. The high-temperature exhaust gas spirally rises to exchange heat with the cylinder 8, which lengthens the time and distance of the heat exchange and is conducive to the full transfer of heat.

[0023] As a preferred embodiment, the agitator includes a motor provided at the top of the cylinder 8 and a rotating shaft 10 driven by the motor to rotate. The rotating shaft 10 is inserted through the cover 9 and extends vertically into the cylinder 8. A stirring blade 11 and a blade 12 are provided on the rotating shaft 10. After the materials are transported and weighed by the spiral metering scale 6, they enter the cylinder 8 of the upper agitator 4. The motor drives the rotating shaft 10 to rotate, and the stirring blade 11 and the blade 12 on the rotating shaft 10 rotate accordingly. The blade 12 further crushes the materials, and the stirring blade 11 stirs and mixes to achieve accurate proportioning and uniform mixing. After the mixing is completed, the valve on the connecting pipe 15 is opened to discharge it to the lower agitator 5. In order to improve the crushing effect, a number of fixed blades 13 are provided on the inner wall of the cylinder 8. The fixed blade 13 is L-shaped, including a longitudinal part that fits the inner wall of the cylinder 8 and a transverse part 14 extending in the direction of the axis of the cylinder 8. The two sides of the transverse part 14 are serrated. When the stirring blade 11 stirs, the material is further crushed by the fixed blade 13, thereby improving the crushing effect.

[0024] As a preferred embodiment, the fixed blade 13 is installed at the bottom of the rotating shaft 10, and there is a gap between the blade 12 and the transverse portion 14 of the fixed blade 13. When the blade 12 rotates, it cooperates with the transverse portion 14 of the fixed blade 13 to shear the material, further improving the crushing effect of the material and facilitating uniform mixing.

[0025] As a preferred embodiment, the blade 12 is slidably connected to the rotating shaft 10, and a matching limiting mechanism is provided between the blade 12 and the rotating shaft 10. The limiting mechanism is a slide groove 16 provided on the rotating shaft 10 along the length direction. The blade 12 is provided with a connecting pin 26 that slides and cooperates with the slide groove 16. The blade 12 is sleeved on the rotating shaft 10, and the connecting pin 26 passes through the blade 12 and extends into the slide groove 16, so that the blade 12 can slide up and down along the rotating shaft 10 and rotate together with the rotating shaft 10. The rotating shaft 10 is provided with an elastic reset mechanism that cooperates with the blade 12. The elastic reset mechanism includes an elastic member that applies force to the blade 12. Specifically, the bottom of the rotating shaft is stepped, and the blade 12 is slidably connected to the thin end. The rotating shaft 10 is sleeved with an elastic pad 17 located between the upper side of the blade 12 and the stepped surface. The stepped surface and the upper side of the blade 12 are both provided with grooves that slide with the elastic pad 17. A limiting member is provided at the end of the rotating shaft 10 18. The elastic member is located between the limit member 18 and the lower side of the blade 12. The elastic member applies an upward force to the blade 12, and the elastic pad 17 resists and limits the upper end of the blade 12, so that the blade 12 is in an initial state with a specific gap with the fixed blade 13. When a larger material enters the gap between the blade 12 and the fixed blade 13, it will exert a downward force on the blade 12. At this time, the blade 12 slides down, the elastic member is compressed, and the gap becomes larger so that it can pass smoothly. Then the elastic member resets and pushes the blade 12 to move up and reset to prevent the blade 12 from getting stuck. The groove between the upper side of the blade 12 and the stepped surface has a certain depth. When the blade 12 slides down, the two ends of the elastic pad 17 are always located in the groove between the upper side of the blade 12 and the stepped surface without separating. The elastic pad 17 resists and cooperates with the blade 12 to achieve soft contact, reduce damage, and prevent material from entering so that the blade 12 can be reset smoothly.

[0026] As a preferred embodiment, the elastic member is a spring 19, which is sleeved on the rotating shaft and located between the limit member 18 and the blade 12. The blade 12 has a ring 20 on which the spring sleeve 19 is located. The limit member 18 is provided with a ring groove 7 that cooperates with the ring 20. The lower end of the ring 20 is located in the ring groove 7. When the blade 12 slides and resets on the rotating shaft, the ring 20 slides in the ring groove 7. The ring 20 serves to block the material and prevent the material from entering and rendering the spring 19 ineffective.

[0027] As a preferred embodiment, the limiter 18 is threadedly connected to the rotating shaft 10, and the initial elastic force of the blade 12 by the spring 19 is adjusted by adjusting the height position of the limiter 18, so that the force required for the blade 12 to slide down can be adjusted as needed.

Claims

1. A fly ash ceramsite preparation device, comprising a storage device, a stirring device, a granulating device, and a baking device connected in sequence, wherein the stirring device comprises a cylinder and a stirrer installed in the cylinder, characterized in that: The cylinder is provided with a jacket, which is provided with an air inlet, an exhaust port and a drain port. The baking device includes a rotary kiln with a preheating box and a roasting box. The air inlet of the jacket is connected to the roasting box through a pipeline, the exhaust port is connected to the preheating box through a pipeline, and the drain port is connected to the granulating device through a pipeline. The agitator includes a driver provided at the top of the cylinder and a rotating shaft driven to rotate by the driver. The rotating shaft is inserted through the cylinder and vertically extends into the cylinder. A stirring blade and a blade are provided on the rotating shaft. A plurality of fixed blades are provided on the inner wall of the cylinder. The blades are slidably connected to the rotating shaft. A matching limiting mechanism is provided between the blade and the rotating shaft, and the blade can slide relative to the rotating shaft and rotate with the rotating shaft through the matching limiting mechanism. An elastic reset mechanism matching the blade is provided on the rotating shaft, and the elastic reset mechanism includes an elastic member that applies a force to the blade. The blade is in an initial state with a specific gap with the fixed blade under the limitation of the limiting mechanism and the elastic reset mechanism. The blade slides relative to the rotating shaft under the action of external force to increase the gap. At this time, the elastic member is further deformed to generate elastic force. After the external force is removed, the elastic force of the elastic member resets the blade to its initial state.

2. The preparation equipment of fly ash ceramsite according to claim 1, characterized in that: A spiral partition is provided between the jacket and the outer wall of the cylinder. The spiral partition separates the space between the jacket and the cylinder into a spiral channel. The air inlet is located at the lower position of the channel, and the exhaust port is located at the upper position of the channel.

3. The preparation equipment of fly ash ceramsite according to claim 1, characterized in that: The granulation device comprises a granulator and a water supply device connected to the granulator, and the drain outlet is connected to the water supply device.

4. The preparation equipment of fly ash ceramsite according to claim 3, characterized in that: The fixed blade is L-shaped, comprising a longitudinal portion fitted with the inner wall of the cylinder and a transverse portion extending toward the axis of the cylinder, and both sides of the transverse portion are serrated.

5. The fly ash ceramsite preparation equipment according to claim 1, characterized in that: The blade is mounted on the bottom of the rotating shaft, and a gap is provided between the blade and the transverse portion of the fixed blade.

6. The fly ash ceramsite preparation equipment according to claim 1, characterized in that: The elastic reset mechanism includes a limiter mounted on the rotating shaft, the elastic member is a spring, the spring is sleeved on the rotating shaft and located between the limiter and the blade, the blade has a ring on which the spring is sleeved, and the limiter is provided with a sliding fit with the ring.

7. The fly ash ceramsite preparation equipment according to claim 6, characterized in that: The limiting member is threadedly connected to the rotating shaft, and the limiting member adjusts the elastic force of the elastic member on the blade by changing its position through rotation.

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