An airflow pulverizer for oil shale dry distillation waste

Abstract

An airflow pulverizing device for oil shale dry distillation waste includes a classification chamber, a pulverizing chamber, and a discharge pipe. The classification chamber contains a classification impeller with an open upper end connected to an exhaust pipe. Multiple nozzles for injecting high-pressure airflow into the pulverizing chamber are arranged in a circumferential array on the sidewall of the pulverizing chamber. The nozzle trajectories converge in the center of the pulverizing chamber to form a pulverizing zone. A guide ring is located below the classification impeller inside the classification chamber. The top surface of the guide ring has an annular groove that fits against the inner wall of the classification chamber. A guide channel extends inward from the guide ring, inclined downwards, and multiple guide channels are arranged in a circumferential array. The guide channels communicate with the annular grooves, and their ends are located above the pulverizing zone of the pulverizing chamber. This design effectively reduces the amount of residue falling into the discharge pipe, thereby reducing the frequency of residue collection and refeeding, and simplifying management processes and workload during pulverization.

Description

Technical Field

[0001] This utility model belongs to the field of oil shale dry distillation waste residue pulverization technology, and particularly relates to an airflow pulverization device for oil shale dry distillation waste residue. Background Technology

[0002] Utilizing oil shale carbonization waste residue as raw material has significant potential and yields substantial benefits in the production of carbon black, agricultural black mulch film, soil remediation agents, and building materials. Before use, oil shale carbonization waste residue needs to be pulverized into powder using a crushing device. Currently, airflow pulverizers are primarily used for this purpose. During operation, the airflow pulverizer uses high-pressure airflow from Laval nozzles to cause the waste residue to collide with each other, thus crushing it. The crushed waste residue moves upward under the influence of the airflow and is then classified by a classifying impeller. Small particles of suitable size enter the classifying impeller and are discharged, while larger particles are thrown towards the inner wall of the airflow pulverizer by the classifying impeller and then fall. Some of the fallen waste residue re-enters the high-pressure airflow pulverizing area for further crushing, while the majority falls along the inner wall of the airflow pulverizer and directly into the discharge bin at the bottom, requiring collection and re-feeding into the airflow pulverizer for further crushing. Existing air jet mills of this type require regular cleaning of the waste collected at the bottom and refeeding, which increases the management process and workload during the use of the air jet mill. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an airflow pulverizer for oil shale dry distillation waste residue, which can effectively reduce the amount of residue falling into the discharge pipe, thereby reducing the number of times residue collection and refeeding are required, and reducing the management process and work involved in the pulverization process.

[0004] In order to achieve the purpose of this utility model, the following solution is proposed:

[0005] An airflow pulverizing device for oil shale dry distillation waste includes: a classification chamber, a pulverizing chamber, and a discharge pipe arranged sequentially from top to bottom. Specifically, the classification chamber is equipped with a classification impeller with an open upper end that is connected to an exhaust pipe. The end of the exhaust pipe is used to connect to a negative pressure fan. The side wall of the pulverizing chamber is equipped with multiple nozzles arranged in a circumferential array for spraying high-pressure airflow into the pulverizing chamber. The spray trajectories of the nozzles converge in the middle of the pulverizing chamber to form a pulverizing zone.

[0006] Inside the classifier chamber, a guide ring is provided below the classifier impeller. The top surface of the guide ring has an annular groove that fits against the inner wall of the classifier chamber. The guide ring extends inward to provide a guide channel. The guide channel is inclined downward and is arranged in a circumferential array. The guide channel is connected to the annular groove, and the end of the guide channel is located above the crushing area of ​​the crushing chamber.

[0007] The beneficial effects of this utility model are as follows: This solution uses a guide ring to collect the residue thrown out by the classifying impeller above the crushing area, so that the thrown residue is crushed again, thereby preventing the thrown residue from falling directly into the discharge pipe, thus reducing the number of times residue is collected and re-fed, and reducing the management process and work content in the crushing process. Attached Figure Description

[0008] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of this invention.

[0009] Figure 1 A schematic diagram of the external structure of this application is shown.

[0010] Figure 2 An overall sectional view of this application is shown.

[0011] Figure 3 A schematic diagram of the flow guide ring is shown.

[0012] The markings in the diagram are: Classification chamber-1, Classification impeller-11, Exhaust pipe-12, Crushing chamber-2, Nozzle-21, Discharge pipe-3, Guide ring-4, Annular groove-41, Guide groove-42, Pipe body-5, Air pipe-51. Detailed Implementation

[0013] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.

[0014] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, and are only for the convenience of describing this utility model and simplifying the description. The terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "parallel," "vertical," etc., do not mean that the components are required to be absolutely parallel or perpendicular, but can be slightly tilted.

[0016] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] like Figures 1 to 3 As shown, an airflow pulverizing device for oil shale dry distillation waste includes: a classification chamber 1, a pulverizing chamber 2, and a discharge pipe 3 arranged sequentially from top to bottom. Specifically, the classification chamber 1 is equipped with a classification impeller 11, the upper end of which is open and connected to an exhaust pipe 12. The end of the exhaust pipe 12 is used to connect to a negative pressure fan. The side wall of the pulverizing chamber 2 is provided with a plurality of nozzles 21 arranged in a circumferential array for spraying high-pressure airflow into the pulverizing chamber 2. The spray trajectory of the nozzles 21 converges in the middle of the pulverizing chamber 2 to form a pulverizing area.

[0018] Specifically, such as Figure 2 , Figure 3 As shown, a guide ring 4 is provided inside the classification chamber 1 below the classification impeller 11. The top surface of the guide ring 4 has an annular groove 41, which fits against the inner wall of the classification chamber 1. The guide ring 4 extends inward to provide a guide groove 42, which is inclined downward and has multiple grooves arranged in a circumferential array. The guide groove 42 is connected to the annular groove 41, and the end of the guide groove 42 is located above the crushing area of ​​the crushing chamber 2.

[0019] During operation, residual powder with a qualified particle size passes through the classifying impeller 11 and is discharged from the exhaust pipe 12, then collected by a cyclone collector and a bag filter. Waste residue thrown onto the inner wall of the classifying chamber 1 by the classifying impeller 11 automatically falls onto the annular groove 41, and then automatically falls into the crushing area along the guide groove 42. This prevents the waste residue thrown onto the inner wall of the classifying chamber 1 from falling directly into the discharge pipe 3, thereby reducing the amount of residue collected inside the discharge pipe 3, and thus reducing the number of times residue needs to be collected and fed, and reducing the workload.

[0020] Preferred, such as Figure 3 As shown, the top surfaces of the guide groove 42 and the annular groove 41 are on the same conical surface, and the cone apex of the conical surface faces downward, so as to improve the flowability of residue inside the guide ring 4.

[0021] Preferred, such as Figure 3 As shown, the cross-sectional width at the end of the guide channel 42 is smaller than the cross-sectional width at the front end of the guide channel 42. The front end of the guide channel 42 is the end where the guide channel 42 connects to the annular groove 41, in order to reduce the resistance to the rise of the dry waste residue after crushing and to keep the channel between the crushing area and the classification chamber 1 smooth.

[0022] Preferably, the bottom surface of the guide channel 42 is an arc surface to reduce the resistance to the rising airflow, so that the crushed material can rise smoothly.

[0023] Preferred, such as Figure 1 , Figure 2 As shown, the discharge pipe 3 is located at the lower end of a pipe body 5, and the upper end of the pipe body 5 is sealed to the crushing chamber 2. At least three air pipes 51 are arranged in a circumferential array on the side wall of the pipe body 5. The air pipes 51 are inserted into the pipe body 5 tangentially and inclined towards the upper part of the pipe body 5. The insertion direction of the air pipes 51 is consistent with the rotation direction of the circumference. The air pipes 51 are used to inject airflow into the upper pipe body 5. The pressure of the airflow injected by the air pipes 51 is less than the pressure of the airflow injected by the nozzle 21. The airflow injected by the air pipes 51 can form a vortex above, and the vortex has an upward trend. Because the air pipes 51 are arranged tangentially, the vortex area is located outside the crushing area. This method can make the residue below the crushing area rise and re-enter the crushing area for crushing, further reducing the amount of residue falling into the discharge pipe 3.

[0024] The above description is merely a preferred embodiment of this utility model and does not imply its uniqueness or limitation. Those skilled in the art should understand that various changes or equivalent substitutions made to this utility model without departing from its scope are all within the protection scope of this utility model.

Claims

1. An oil shale retort waste residue air stream pulverizing device, comprising: The classification chamber (1), the crushing chamber (2) and the discharge pipe (3) are arranged from top to bottom, the classification chamber (1) is internally provided with a classification impeller (11), the upper end of the classification impeller (11) is open and communicates with an exhaust pipe (12), the tail end of the exhaust pipe (12) is used for connecting a negative pressure fan, the side wall of the crushing chamber (2) is circumferentially provided with a plurality of nozzles (21) for spraying high-pressure airflow into the crushing chamber (2), the spraying tracks of the nozzles (21) converge at the middle part of the crushing chamber (2) and are used for forming a crushing area, and the classification chamber (1) is characterized in that: The classification chamber (1) is internally provided with a flow guide ring (4) corresponding to the lower part of the classification impeller (11), the top surface of the flow guide ring (4) has an annular groove (41), the annular groove (41) is attached to the inner wall of the classification chamber (1), the flow guide ring (4) is internally provided with a flow guide groove (42) extending inwards, the flow guide groove (42) is arranged to be inclined downward and is circumferentially provided with a plurality of flow guide grooves (42), the flow guide groove (42) communicates with the annular groove (41), and the tail end of the flow guide groove (42) is located above the crushing area of the crushing chamber (2).

2. The oil shale retort waste residue air stream pulverizing device according to claim 1, characterized in that, The top surfaces of the flow guide groove (42) and the annular groove (41) are on the same conical surface, and the apex of the conical surface faces downward.

3. The oil shale retort waste residue air stream pulverizing device according to claim 1, characterized in that, The cross-sectional width of the tail end of the flow guide groove (42) is smaller than the cross-sectional width of the front end of the flow guide groove (42).

4. The oil shale retort waste residue air flow pulverizing device according to claim 1 or 3, characterized in that, The bottom surface of the flow guide groove (42) is a circular arc surface.

5. The oil shale retort waste residue air stream pulverizing device according to claim 1, characterized in that, The discharge pipe (3) is arranged at the lower end of a pipe body (5), the upper end of the pipe body (5) is sealingly connected with the crushing chamber (2), the side wall of the pipe body (5) is circumferentially provided with at least three air pipes (51), the air pipes (51) are inserted into the pipe body (5) along the tangential direction, the insertion directions of the air pipes (51) are consistent with the circumferential rotation direction, the air pipes (51) are used for injecting airflow into the pipe body (5), and the pressure of the airflow injected by the air pipes (51) is smaller than the pressure of the airflow injected by the nozzles (21).

6. The oil shale retort waste residue air stream pulverizing device according to claim 5, characterized in that, The air outlet ends of the air pipes (51) are inclined towards the upper part of the pipe body (5).

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