Fly ash ceramsite preparation equipment

Abstract

The invention discloses fly ash ceramsite preparation equipment which comprises a storage device, a stirring device, a granulation device and a baking device which are connected in sequence, the stirring device comprises a cylinder and a stirrer installed in the cylinder, a jacket is arranged outside the cylinder and provided with an air inlet, an air outlet and a water outlet, and the air inlet is communicated with the air outlet. The roasting device comprises a rotary furnace with a preheating box and a roasting box, an air inlet of the jacket is connected with the roasting box through a pipeline, an air outlet of the jacket is connected with the preheating box through a pipeline, and a water outlet of the jacket is connected with the granulating device through a pipeline. The invention provides the preparation equipment of the fly ash ceramsite, which ensures that all materials are uniformly mixed, fully utilizes heat and is energy-saving and environment-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, as a by-product of waste incineration, contains high amounts 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, CaO, etc. These components allow the fly ash to be processed by washing and other treatments, and then 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, the fly ash and sludge need to be dried, crushed, and stirred. Drying requires more heat, and 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 prior art.

[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 which are connected in sequence, the stirring device comprising a cylinder and a stirrer 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, and 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] The granulation device further comprises 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 agitator 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 extends vertically into the cylinder. Agitating blades and blades are arranged on the rotating shaft.

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

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

[0010] Furthermore, the blade is installed with a rotating shaft bottom, and there is a gap between the blade and the transverse part 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 together 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 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] The elastic reset mechanism further comprises a limit piece installed on the rotating shaft, the elastic piece is a spring, the spring is sleeved on the rotating shaft and located between the limit piece and the blade, the blade has a ring on which the spring is sleeved, and the limit piece 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, materials for making ceramsite are respectively stored in the material storage device, and the materials are transported and weighed by a spiral metering scale to enter the upper stirring device according to a certain proportion, and the materials after stirring and mixing enter the granulating device for granulation, and the formed ceramsite semi-finished products enter the baking device for sintering to complete the firing of the ceramsite. The stirring device cylinder, the stirrer installed in the cylinder, the outer side of the cylinder is provided with a jacket, 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 preheating box through a pipeline. 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 exhaust 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 exhaust gas after cooling is supplied to the granulation device through the drain port, and the exhaust gas after cooling flows back to the preheating box through the exhaust port to preheat the ceramsite semi-finished product, thereby realizing full utilization of the heat and achieving the effect of energy saving and environmental protection. 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; slide groove 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 which are 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 outside, and 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, and the storage bins 3 are respectively connected to the cylinder 8 through a spiral metering scale 6. The materials (fly ash, sludge, etc.) for making ceramsite are stored respectively, and the materials are transported and weighed by the spiral metering scale 6 so that the materials enter the cylinder 8 of the stirring device according to a certain proportion. The stirrer in the cylinder 8 stirs and crushes the materials, 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 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 flows back 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 water vapor 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 water vapor in the high-temperature exhaust gas will not be absorbed by the material, so that the material has a better drying effect, and the condensed water formed by the cooling after the high-temperature exhaust gas heats the cylinder 8 can be used 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 arranged at the top of the cylinder 8 and a rotating shaft 10 driven to rotate by the motor. The rotating shaft 10 is inserted through the cover body 9 and vertically extends into the cylinder 8. A stirring blade 11 and a blade 12 are arranged on the rotating shaft 10. After each material is transported and weighed by the spiral metering scale 6, it enters 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 material, 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 plurality of fixed blades 13 are arranged on the inner wall of the cylinder 8. The fixed blade 13 is L-shaped, including a longitudinal portion fitted with the inner wall of the cylinder 8 and a transverse portion 14 extending in the direction of the axial center line of the cylinder 8. The two sides of the transverse portion 14 are serrated. When the stirring blade 11 stirs, the material is further crushed through the fixed blade 13 to improve 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, and a connecting pin 26 that is slidably connected to the slide groove 16 is provided on the blade 12. 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. An elastic reset mechanism that cooperates with the blade 12 is provided on the rotating shaft 10, and the elastic reset mechanism includes an elastic member that applies a 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, and an elastic pad 17 located between the upper side of the blade 12 and the stepped surface is sleeved on the rotating shaft 10, and the stepped surface and the upper side of the blade 12 are both provided with grooves that are slidably connected to the elastic pad 17, and 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. 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 to allow it to 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 slide groove between the upper side of the blade 12 and the step 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 step 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 arranged. The limit member 18 is provided with an annular groove 7 that cooperates with the ring 20. The lower end of the ring 20 is located in the annular groove 7. When the blade 12 slides and resets on the rotating shaft, the ring 20 slides in the annular 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 limit member 18 is threadedly connected to the rotating shaft 10, and the initial elastic force of the blade 12 is adjusted by the spring 19 by adjusting the height position of the limit member 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: A jacket is provided outside the cylinder, and 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 granulation device through a pipeline.

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, and the spiral partition divides 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 or 2, characterized in that: The granulation device comprises a granulator and a water supply device connected to the granulator, and the drain port is connected to the water supply device.

4. The fly ash ceramsite preparation device according to claim 1 or 2, characterized in that: The stirrer comprises 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.

5. The preparation equipment of fly ash ceramsite according to claim 4, characterized in that: A plurality of fixed blades are arranged on the inner wall of the cylinder.

6. The fly ash ceramsite preparation equipment according to claim 5, characterized in that: The fixed blade is L-shaped, comprising a longitudinal portion that fits the inner wall of the cylinder and a transverse portion that extends in the direction of the axis of the cylinder, and both sides of the transverse portion are serrated.

7. The fly ash ceramsite preparation equipment according to claim 6, characterized in that: The blade is installed with a rotating shaft bottom, and there is a gap between the blade and the transverse part of the fixed blade.

8. The fly ash ceramsite preparation equipment according to claim 5, characterized in that: 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 together 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.

9. The fly ash ceramsite preparation device according to claim 8, 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.

10. The fly ash ceramsite preparation device according to claim 9, characterized in that: 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.

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