Activated carbon fluidized bed furnace

Abstract

The application discloses a kind of active carbon boiling furnace, it includes the furnace body being arranged on support, the top and bottom of furnace body are provided with air outlet and air inlet respectively, air inlet is connected with heating furnace and fan in proper order by outside pipeline, air outlet is connected with dust removal ventilation device by outside pipeline, air inlet and air outlet are provided with screen and temperature sensor, vertically arranged in furnace body there is the lance that can rotate freely along its axis, the lower end of lance is equipped with rotating disc;Active carbon particles in furnace body are driven by hot air and are ejected and boil under lance, and the air flow of several mesh holes of rotating disc for lance outside is circulated, the impact of active carbon particles ejected by lance can be reduced by the buffering of air flow, to reduce damage;Meanwhile, the conical end cover of rotating disc and bottom can make the active carbon particles that fall can automatically slide to the bottom of lance and be ejected and boil again, to this cycle, to reach the uniform boiling activation of active carbon particles.

Description

Technical Field

[0001] This invention relates to the field of activated carbon treatment technology, and more specifically to an activated carbon fluidized bed furnace. Background Technology

[0002] Impregnated activated carbon is made by impregnating RFHT-02 type activated carbon with a copper-chromium-silver-ammonia mixed solution, followed by resting and drying. It is a protective material for filter absorbers in civil defense engineering equipment, and its performance determines the protective performance of the filter absorber; therefore, impregnated activated carbon is crucial to civil defense filter absorbers.

[0003] The production process of impregnated activated carbon includes: solution preparation, impregnation, drying and activation, and aging. Currently, the drying and activation process generally uses a fluidized bed furnace to activate and boil the activated carbon. The fluidized bed furnace is a thermal device employing "polymeric fluidized bed" technology. It consists of two parts: a lower air chamber for supplying fluid and an upper fluidized bed chamber for holding granular materials. A permeable distribution plate is installed between the air chamber and the fluidized bed chamber. The fluid flows upward from the air chamber, passes through the distribution plate, and crosses the stationary layer of granular materials into the fluidized bed chamber. When the fluid velocity reaches a certain value, the granular material layer is blown and lifted, exhibiting an up-and-down churning appearance, similar to "boiling."

[0004] Currently, the activation rate of activated carbon in a fluidized bed furnace depends entirely on the airflow, which can easily lead to uneven activation of activated carbon during the fluidized bed process. Furthermore, activated carbon is prone to damage during the "fluidization" process, thus affecting the production quality and efficiency of activated carbon. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides an activated carbon fluidized bed furnace, which solves the problem of poor treatment effect of existing equipment for fluidized bed activation of activated carbon.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An activated carbon fluidized bed furnace is provided, comprising a furnace body mounted on a support. An air outlet and an air inlet are respectively provided at the top and bottom of the furnace body. The air inlet is connected to a heating furnace and a blower in sequence through an external pipe. The air outlet is connected to a dust removal and ventilation device through an external pipe. A mesh plate and a temperature sensor are provided at both the air inlet and the air outlet. A spray pipe that can rotate freely along its axis is vertically arranged inside the furnace body. A turntable is fitted at the lower end of the spray pipe.

[0008] Furthermore, the nozzle has several spray holes on its upper side wall, and several first rotating blades are arranged circumferentially on the inner wall of the nozzle.

[0009] Furthermore, a sleeve is installed inside the furnace body, and the outer wall of the sleeve is fixedly connected to the inner wall of the furnace body through several support rods. A bearing is installed inside the sleeve, and the spray pipe is fixedly installed on the bearing.

[0010] Furthermore, the support rod includes a first support rod and a second support rod. One end of the first support rod and the second support rod are fixedly connected to the sleeve and the furnace body, respectively, and the other end of the first support rod and the second support rod are threaded into the screw sleeve.

[0011] Furthermore, the top and bottom of the furnace body are equipped with conical end caps, and the air outlet and air inlet are located on the constricted end of the conical end caps.

[0012] Furthermore, a flow divider ring is provided above the mesh plate at the air inlet, and the flow divider ring is in close contact with the mesh plate. A nozzle is provided in the middle of the flow divider ring, which is directly opposite the nozzle opening. Several mesh holes are evenly distributed on the flow divider ring around the nozzle.

[0013] Furthermore, the turntable includes an upper turntable and a lower turntable in the shape of a frustum. The flared ends of the upper and lower turntables are connected to each other, and the constricted ends of the upper and lower turntables are fitted onto the nozzle. Several mesh holes are arranged around the circumference of both the upper and lower turntables.

[0014] Furthermore, the inner wall of the conical end cap at the top of the furnace body is covered with a silicone pad, and the conical end cap at the bottom of the furnace body is spaced apart from the lower turntable, with several second rotating blades provided on the edge of the lower turntable.

[0015] Furthermore, connecting flanges are installed on the pipes at the air inlet and air outlet. The connecting flanges have slots for inserting the mesh plates. Knurled high-head screws for pressing the mesh plates are hinged on the connecting flanges. The pipes at the air inlet and air outlet are connected to external pipes through quick-connect couplings. The side walls of the furnace body are made of high borosilicate glass.

[0016] Furthermore, a conical material distribution plate is installed at the air outlet.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. This solution uses a diversion ring to split the gas at the air inlet, allowing some hot air to be blown into the nozzle through the nozzle, while the rest is dispersed through several mesh openings around the nozzle and acts on the outside of the nozzle. This causes the activated carbon particles inside the furnace to be sprayed and tumbled through the nozzle under the drive of the hot air. At the same time, the mesh openings on the turntable and the material drop points on the edge of the turntable also cause the activated carbon particles to tumble and boil to varying degrees under the drive of the hot air. Furthermore, the mesh openings on the turntable are used for airflow outside the nozzle, and the airflow buffer reduces the impact of the activated carbon particles falling from the nozzle, thereby reducing damage. At the same time, the turntable and the conical end cap at the bottom allow the falling activated carbon particles to automatically slide to the bottom of the nozzle for re-spraying and tumbling, thus achieving uniform boiling activation of the activated carbon particles.

[0019] 2. Under the action of airflow, the first rotating blade can drive the nozzle and the turntable to rotate during the spraying process. At the same time, the second rotating blade can also drive the turntable to rotate slowly under the action of the activated carbon particles automatically sliding down the edge of the turntable, so as to achieve the purpose of uniform heating of the activated carbon particles.

[0020] 3. The furnace body made of high borosilicate glass has good high temperature resistance and is transparent to facilitate observation of the boiling activation of activated carbon particles; the silicone pad can be used to protect the activated carbon particles sprayed from the nozzle, preventing them from being damaged by direct impact with the top conical end cap.

[0021] 4. This solution allows for easy assembly and disassembly of the pipes at the air inlet and outlet via quick-connect couplings, facilitating the loading of activated carbon granules from the air outlet and unloading from the air inlet; at the same time, the conical distribution plate disperses the activated carbon granules during loading, preventing them from concentrating and falling into the spray pipe. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an activated carbon fluidized bed furnace, a heating furnace, and a blower.

[0023] Figure 2 This is a side view of an activated carbon fluidized bed furnace.

[0024] Figure 3 This is a cross-sectional view of an activated carbon fluidized bed furnace.

[0025] Figure 4 This is a three-dimensional sectional view of the bottom of an activated carbon fluidized bed furnace.

[0026] Figure 5 This is a schematic diagram of the top structure of an activated carbon fluidized bed furnace.

[0027] The components are as follows: 1. Support frame; 2. Furnace body; 3. Air outlet; 4. Air inlet; 5. Heating furnace; 6. Fan; 7. Mesh plate; 8. Temperature sensor; 9. Nozzle; 10. Nozzle hole; 11. First rotating blade; 12. Sleeve; 13. First support rod; 14. Second support rod; 15. Screw sleeve; 16. Conical end cap; 17. Diverter ring; 18. Nozzle; 19. Mesh; 20. Upper turntable; 21. Lower turntable; 22. Second rotating blade; 23. Connecting flange; 24. Slot; 25. Knurled high head screw; 26. Conical material distribution plate; 27. Caster wheel; 28. Silicone pad. Detailed Implementation

[0028] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0029] like Figure 1 As shown, the activated carbon fluidized bed furnace of this scheme includes a furnace body 2 mounted on a support 1. The bottom of the support 1 is equipped with self-locking casters 27 to facilitate the movement of the furnace body 2. The top and bottom of the furnace body 2 are respectively equipped with an air outlet 3 and an air inlet 4. The air inlet 4 is connected to the heating furnace 5 and the fan 6 in sequence through external pipes. The air outlet 3 is connected to the dust removal and ventilation device through external pipes. Both the air inlet 4 and the air outlet 3 are equipped with a mesh plate 7 and a temperature sensor 8. A spray pipe 9 that can rotate freely along its axis is vertically mounted inside the furnace body 2. A turntable is fitted at the lower end of the spray pipe 9.

[0030] In the design, the top and bottom of the furnace body 2 are provided with conical end caps 16 that protrude outwards. The air outlet 3 and the air inlet 4 are both located on the conical end caps 16. The spray pipe 9 has several spray holes 10 on its upper side wall. The turntable includes an upper turntable 20 and a lower turntable 21 in the shape of a frustum. The flared ends of the upper turntable 20 and the lower turntable 21 are connected to each other. The conical ends of the upper turntable 20 and the lower turntable 21 are both fitted onto the spray pipe 9. Several mesh holes 19 are arranged around the circumference of the upper turntable 20 and the lower turntable 21. The conical end cap 16 at the bottom of the furnace body 2 is spaced apart from the lower turntable 21.

[0031] A flow divider ring 17 is provided above the mesh plate 7 located at the air inlet 4, and the flow divider ring 17 is closely attached to the mesh plate 7. A nozzle 18 is provided in the middle of the flow divider ring 17, which is directly opposite the nozzle opening of the nozzle 9. A number of mesh holes 19 are evenly distributed on the flow divider ring 17 around the nozzle 18.

[0032] This scheme uses a diversion ring 17 to divert the gas at the air inlet 4, allowing some hot air to be blown into the nozzle 9 through the nozzle 18, and some hot air to be dispersed through several mesh holes 19 around the nozzle 18 and act on the outside of the nozzle 9. This causes the activated carbon particles in the furnace body 2 to be sprayed and tumbled through the nozzle 9 under the drive of hot air. The several mesh holes 19 of the turntable are used for airflow outside the nozzle 9. The airflow buffer reduces the impact of the activated carbon particles falling from the nozzle 9, thereby reducing damage. At the same time, the turntable and the conical end cap 16 at the bottom allow the falling activated carbon particles to automatically slide to the bottom of the nozzle 9 for spraying and tumbling again. This cycle is repeated to achieve uniform boiling activation of the activated carbon particles.

[0033] Several first rotating blades 11 are arranged circumferentially on the inner wall of the lower end of the nozzle 9; several second rotating blades 22 are arranged on the edge of the lower turntable 21; wherein the first rotating blades 11 can drive the nozzle 9 and the turntable to rotate during the spraying process under the action of the airflow, and the second rotating blades 22 can also drive the turntable to rotate slowly under the action of the activated carbon particles automatically sliding down the edge of the turntable, so as to achieve the purpose of uniform heating of the activated carbon particles.

[0034] Preferably, the sidewalls of the furnace body 2 are made of high borosilicate glass, which has good high temperature resistance, and the furnace body 2 is transparent to facilitate observation of the boiling activation of activated carbon particles; the inner wall of the conical end cap 16 at the top of the furnace body 2 is covered with a silicone pad 28, which can be used to protect the activated carbon particles sprayed from the nozzle 9 and prevent the activated carbon particles from directly impacting the top conical end cap 16 and causing damage; a conical distribution plate 26 is provided at the air outlet 3 to disperse the activated carbon particles during loading and prevent the activated carbon particles from falling into the nozzle 9.

[0035] This embodiment also provides a specific limiting method for the nozzle 9. A sleeve 12 is provided inside the furnace body 2, and a bearing is provided inside the sleeve 12. The nozzle 9 is fixedly installed on the bearing. The outer wall of the sleeve 12 is fixedly connected to the inner wall of the furnace body 2 by three support rods. The support rods include a first support rod 13 and a second support rod 14. One end of the first support rod 13 and the second support rod 14 are fixedly connected to the sleeve 12 and the furnace body 2, respectively. The other end of the first support rod 13 and the second support rod 14 are threadedly engaged with the threaded sleeve 15. In this solution, by releasing the limiting of the threaded sleeve 15 between the first support rod 13 and the second support rod 14, the sleeve 12, the nozzle 9 and the turntable can be disassembled to facilitate the maintenance and replacement of each component.

[0036] This embodiment also provides a specific limiting method for the mesh plate 7. Both the air inlet 4 and the air outlet 3 are provided with connecting flanges 23 that are fastened by bolts. The mating plate surface of the connecting flange 23 is sealed by a sealing gasket. The connecting flange 23 is provided with a slot 24 for inserting the mesh plate 7. The connecting flange 23 is hinged with a knurled head screw 25 for pressing the mesh plate 7.

[0037] The pipes at the air inlet 4 and the air outlet 3 are connected to external pipes via quick-connect fittings. The quick-connect fittings make it easy to install and remove the pipes at the air inlet 4 and the air outlet 3, so that activated carbon granules can be loaded from the air outlet 3 and unloaded from the air inlet 4.

[0038] The workflow of this solution is explained in detail below:

[0039] During the loading process, first remove the quick-connect fitting at the air outlet 3, loosen the knurled head screws 25 on the flange 23 of the air outlet 3 and pull out the mesh plate 7. Pour the impregnated activated carbon granules into the furnace body 2 through the air outlet 3, then reinsert the mesh plate 7 into the flange 23 and fix it, and reconnect the quick-connect fitting at the air outlet 3.

[0040] During operation: The control box power is turned on, the time and inlet / outlet temperatures are set, and the heating furnace 5 and blower 6 are turned on. Hot air is introduced into the furnace body 2 through the air inlet 4, and the spray from the nozzle 9 is controlled by adjusting the airflow of the blower 6 to maximize the spray volume while ensuring the activated carbon particles do not collide with the top conical end cap 16. Simultaneously, the activated carbon particles fall evenly around the turntable. When the inlet and outlet temperatures differ significantly, it indicates that the activated carbon particles are still drying; in this case, the hot air temperature should be set to the specified drying temperature. When the inlet and outlet temperatures are similar, it indicates that drying is complete; in this case, the hot air temperature should be set to the boiling activation temperature. During the drying process, the spray volume, spray speed, and spray height of the nozzle 9 will change with the degree of drying. The nozzle 9 and turntable will also rotate slowly to ensure uniform heating of the activated carbon particles. During the activation boiling period, in addition to the spray from the nozzle 9, different degrees of tumbling and boiling will occur at the turntable mesh 19 and the material drop position at the edge of the turntable. The surrounding airflow can buffer the impact of the falling activated carbon particles, thereby reducing damage to the activated carbon particles.

Claims

1. An activated carbon fluidized bed furnace, characterized in that, The furnace body is mounted on a support frame. The top and bottom of the furnace body are respectively provided with an air outlet and an air inlet. The air inlet is connected to a heating furnace and a blower in sequence through an external pipe. The air outlet is connected to a dust removal and ventilation device through an external pipe. Both the air inlet and the air outlet are provided with a mesh plate and a temperature sensor. A spray pipe that can rotate freely along its axis is vertically installed inside the furnace body. A turntable is fitted at the lower end of the spray pipe. The nozzle has several spray holes on its upper side wall, and several first rotating blades are arranged circumferentially on the inner wall of the nozzle. The top and bottom of the furnace body are both provided with conical end caps, and the air outlet and air inlet are both located on the constricted end of the conical end caps; A flow divider ring is provided above the mesh plate located at the air inlet, and the flow divider ring is in close contact with the mesh plate. A nozzle is provided in the middle of the flow divider ring, which is directly opposite the nozzle opening. Several mesh holes are evenly distributed on the flow divider ring around the nozzle. The turntable includes an upper turntable and a lower turntable in the shape of a frustum. The flared ends of the upper and lower turntables are connected to each other, and the constricted ends of the upper and lower turntables are both fitted onto the nozzle. The upper and lower turntables are each arranged with a number of mesh holes in their circumference. The inner wall of the conical end cap located at the top of the furnace body is covered with a silicone pad, and the conical end cap located at the bottom of the furnace body is spaced apart from the lower turntable. The edge of the lower turntable is provided with several second rotating blades.

2. The activated carbon fluidized bed furnace according to claim 1, characterized in that, The furnace body is provided with a sleeve, and the outer wall of the sleeve is fixedly connected to the inner wall of the furnace body by several support rods. The sleeve is provided with a bearing, and the spray pipe is fixedly installed on the bearing.

3. The activated carbon fluidized bed furnace according to claim 2, characterized in that, The support rod includes a first support rod and a second support rod. One end of the first support rod and the second support rod are fixedly connected to the sleeve and the furnace body, respectively. The other end of the first support rod and the second support rod are threaded into the screw sleeve.

4. The activated carbon fluidized bed furnace according to claim 1, characterized in that, Both the air inlet and outlet pipes are equipped with connecting flanges, and the connecting flanges have slots for inserting mesh plates. The connecting flanges are hinged with knurled high-head screws for pressing the mesh plates. The air inlet and outlet pipes are connected to external pipes through quick-connect couplings. The side walls of the furnace body are made of high borosilicate glass.

5. The activated carbon fluidized bed furnace according to claim 1, characterized in that, A conical material distribution plate is provided at the air outlet.

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