Dust collecting device of clinker kiln
By installing a filter device inside the dust collection chamber of the cyclone dust collector, the problems of material scaling and refractory blockage in the cyclone dust collector are solved, enabling smooth dust return and device stability, and reducing safety hazards.
Patent Information
- Application Number
- CN202511862490.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-03-17
AI Technical Summary
In clinker kilns used in the industrial sintering process for alumina production, dust collectors are susceptible to problems due to material scaling, loose castings, or firebrick blockage at the ash discharge port. This prevents dust from flowing back into the clinker kiln, affecting the stability of the cyclone dust collector and posing a safety hazard.
A filtration device, including a grate or filter screen, is installed in the dust collection bin to block material scaling and loose castable material, reduce the risk of ash discharge port blockage, and ensure that dust flows back to the clinker kiln.
It effectively reduces the risk of airlock valve blockage, ensures smooth dust return, reduces the impact of increased weight and stability of cyclone dust collectors, and lowers safety hazards.
Smart Images
Figure CN121677402A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of rotary kiln sintering process, and particularly relates to a clinker kiln dust collecting device. BACKGROUND
[0002] At present, the waste gas generated in the production of the clinker kiln for producing alumina by industrial sintering method contains a large amount of dust, which needs to be collected by a cyclone dust collector in a dust collecting bin, and the dust collected by the cyclone dust collector can return to the clinker kiln through a dust collecting pipe. However, the cyclone dust collector is often blocked by material scabs, scattered castables and fire bricks falling off in the dust discharging port of the dust collecting bin, so that the dust collected by the cyclone dust collector cannot return to the clinker kiln, and the dust stored in the cyclone dust collector increases the weight of the cyclone dust collector, affecting the stability of the cyclone dust collector and causing certain safety hazards. SUMMARY
[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a clinker kiln dust collecting device, which can block the material scabs, scattered castables and fire bricks etc. that may be generated in the cyclone dust collector, reduce the risk of blocking the dust discharging port, and further reduce the risk of blocking the air lock valve.
[0004] According to the clinker kiln dust collecting device provided by the embodiments of the present application, the filter device is arranged in the dust collecting bin, so that the dust can normally pass through the filter device to return to the clinker kiln, and at the same time, the filter device can block the material scabs, scattered castables and fire bricks etc. that may be generated in the cyclone dust collector, reduce the risk of blocking the dust discharging port, and further reduce the risk of blocking the air lock valve. At the same time, the smooth return of the dust to the clinker kiln can reduce the possibility that the dust stored in the cyclone dust collector increases the weight of the cyclone dust collector and further affects the stability of the cyclone dust collector, thereby reducing safety hazards.
[0005] According to the clinker kiln dust collecting device provided by the embodiments of the present application, the filter device is arranged in the dust collecting bin, so that the dust can normally pass through the filter device to return to the clinker kiln, and at the same time, the filter device can block the material scabs, scattered castables and fire bricks etc. that may be generated in the cyclone dust collector, reduce the risk of blocking the dust discharging port, and further reduce the risk of blocking the air lock valve. At the same time, the smooth return of the dust to the clinker kiln can reduce the possibility that the dust stored in the cyclone dust collector increases the weight of the cyclone dust collector and further affects the stability of the cyclone dust collector, thereby reducing safety hazards.
[0006] According to the clinker kiln dust collecting device provided by some embodiments of the present application, the filter device is provided with a plurality of filter holes, and the maximum diameter of the filter holes is less than or equal to the minimum inner diameter of the dust collecting pipe.
[0007] According to some embodiments of the present application, the filter device of the clinker kiln dust collection device comprises a body part and a filter part, the body part is arranged around the filter part and connected with the inner wall of the dust collection bin, the filter part is arranged opposite to the ash outlet, and the filter hole is arranged on the filter part.
[0008] According to some embodiments of the present application, the filter device of the clinker kiln dust collection device comprises a grate.
[0009] According to some embodiments of the present application, the filter device of the clinker kiln dust collection device comprises a filter screen.
[0010] According to some embodiments of the present application, the grate of the clinker kiln dust collection device is provided with a plurality of grates, and the plurality of grates are arranged at intervals in the depth direction of the dust collection bin.
[0011] According to some embodiments of the present application, the distance from the grate to the ash outlet is less than the distance from the grate to the cyclone in the depth direction of the dust collection bin.
[0012] According to some embodiments of the present application, the air inlet and the air outlet are arranged at one end of the cyclone away from the dust collection bin.
[0013] According to some embodiments of the present application, the clinker kiln dust collection device further comprises an exhaust fan and an electric dust collector, and the exhaust fan is connected between the air outlet and the inlet of the electric dust collector.
[0014] According to some embodiments of the present application, the clinker kiln dust collection device further comprises a door body, the dust collection bin is provided with an opening hole communicating with the inside of the dust collection bin, the door body is connected with the dust collection bin and used to open or close the opening hole, and the opening hole is arranged on the side of the filter device away from the ash outlet.
[0015] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS
[0016] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings. Figure 1 A schematic view of the clinker kiln dust collection device according to some embodiments of the present application applied to a clinker kiln; Figure 2 A schematic view of the clinker kiln dust collection device according to some embodiments of the present application Figure 1 ; Figure 3Fig. 1 is a schematic diagram of a dust collecting device for a clinker kiln according to some embodiments of the present application Figure 2 .
[0017] Reference signs: Clinker kiln dust collecting device 100; Clinker kiln 200; Cyclone dust collector 10; Cyclone 11, air inlet 111, air outlet 112; Dust collecting bin 12, ash discharge port 121; Dust collecting pipe 20, air lock valve 30; Filtering device 40, grate 401, filter hole 402; Exhaust fan 50, electric dust collector 60; Door body 70. DETAILED DESCRIPTION
[0018] In order to better understand the technical solutions provided by the embodiments of the present application, the technical solutions of the embodiments of the present application will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present application and the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application. In the case of no conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.
[0019] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... " does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element. The term "two or more" includes two or more than two.
[0020] At present, the waste gas generated in the production of the clinker kiln for producing alumina by industrial sintering method contains a large amount of dust, which needs to be collected by a cyclone dust collector into a dust collecting bin, and the dust collected by the cyclone dust collector will return to the clinker kiln through a dust collecting pipe. However, the cyclone dust collector is often blocked by material scabs, scattered castables and fallen fire bricks at the ash discharge port of the dust collecting bin, so that the dust collected by the cyclone dust collector cannot return to the clinker kiln, and the accumulation of dust in the cyclone dust collector increases the weight of the cyclone dust collector, affecting the stability of the cyclone dust collector, and there is a certain safety hazard.
[0021] To this end, the application provides a clinker kiln dust collecting device 100, please refer to the following Figures 1-3 The clinker kiln dust collecting device 100 of some embodiments of the application is described.
[0022] As shown in Figure 1 and Figure 2 , the clinker kiln dust collecting device 100 according to the embodiments of the application comprises: a cyclone dust collector 10, a dust collecting pipe 20 and a lock valve 30.
[0023] The cyclone dust collector 10 comprises a cyclone cylinder 11 and a dust collecting bin 12, the cyclone cylinder 11 has an air inlet 111 and an air outlet 112, the air inlet 111 is communicated with the gas outlet of the clinker kiln 200, the dust collecting bin 12 is connected with the cyclone cylinder 11 and is open towards the cyclone cylinder 11, one end of the dust collecting pipe 20 is communicated with the dust discharging port 121 of the dust collecting bin 12 and the other end is used to be communicated with the clinker kiln 200, and the lock valve 30 is arranged in the dust collecting pipe 20; wherein, the dust collecting bin 12 is provided with a filter device 40 arranged opposite to the dust discharging port 121.
[0024] The cyclone cylinder 11 is a cylindrical structure with a diameter of 3.6 meters and a height of 8 meters, the dust collecting bin 12 is a conical structure with a height of 4 meters and a wall thickness of 14 mm made of steel plate, and the inside of the cyclone dust collector 10 is lined with refractory bricks and castable.
[0025] It can be understood that the cyclone dust collector 10 is also called a cyclone dust collector, which is a type of dust collecting device that separates dust particles by centrifugal force generated by rotating airflow. When the dust-containing gas enters the cyclone dust collector, the airflow begins to rotate, and the dust particles are thrown to the wall under the action of centrifugal force and fall along the wall into the dust hopper (the dust collecting bin 12 in the application), and the purified gas is discharged from the exhaust pipe. The lock valve 30 is mainly used to control the flow of gas and prevent air leakage.
[0026] In this way, the waste gas generated by the clinker kiln 200 for producing alumina by industrial sintering method will enter the cyclone cylinder 11 from the gas outlet, as shown by the hollow arrow indicating the flow direction of the gas in Figure 1 , and then the waste gas is separated from the dust particles by centrifugal force generated by rotating airflow in the cyclone cylinder 11, and the dust particles are thrown to the wall under the action of centrifugal force and fall along the wall into the dust collecting bin 12.
[0027] Then, the dust in the dust collecting bin 12 will enter the dust collecting pipe 20 along the dust discharging port 121 under the action of the lock valve 30, and flow back to the clinker kiln 200 along the dust collecting pipe 20, thereby realizing the recycling of the dust.
[0028] The filter device 40 utilizes the space within the dust collection chamber 12 without affecting the external dimensions of the cyclone dust collector 10. Simultaneously, while allowing dust to pass normally through the filter device 40 for return to the clinker kiln 200, the filter device 40 also blocks material agglomerations, loose castables, and firebricks that may form inside the cyclone dust collector 10, reducing the risk of blockage at the ash discharge port 121 and consequently reducing the risk of blockage at the airlock valve 30. Furthermore, the smooth return of dust to the clinker kiln 200 reduces the likelihood of dust accumulation in the cyclone dust collector 10, which could increase its weight and affect its stability, thus minimizing safety hazards.
[0029] In some implementations, the airlock valve 30 may include, but is not limited to, a self-unloading airlock valve 30, a pneumatic flap valve airlock valve 30, etc.
[0030] Self-unloading airlock valve 30: This type of airlock valve 30 typically includes a chute, with a rotating shaft fixedly installed on the inner wall of the chute. A ball bearing I is fixedly connected to the outer wall of the rotating shaft, and ball bearing II is provided on both the front and rear sides of ball bearing I. Narrow plates are fixedly connected to the outer walls of both ball bearing II, and wide plates are fixedly connected to the outer wall of ball bearing I.
[0031] Pneumatic flap valve lock valve 30: The features of the pneumatic flap valve lock valve 30 include that the nozzle size of the openable multi-leaf air regulating valve is the same as that of the rectangular air duct specified in the national standard for ventilation ducts. The layout characteristics of the pneumatic flap valve lock valve 30 include four specifications for blade width, a diamond-shaped double blade shape, a relatively soft overlap between the blade structures, and good sealing system performance.
[0032] According to the clinker kiln dust collection device 100 of this application embodiment, by setting a filter device 40 in the dust collection bin 12, the dust can pass through the filter device 40 normally to achieve dust return to the clinker kiln 200. At the same time, the filter device 40 can block material scale or loose castable and firebricks that may be generated inside the cyclone dust collector 10, reducing the risk of blockage of the ash discharge port 121, thereby reducing the risk of blockage of the airlock valve 30. At the same time, the smooth return of dust to the clinker kiln 200 can reduce the possibility that dust accumulation in the cyclone dust collector 10 will increase the weight of the cyclone dust collector 10 and affect the stability of the cyclone dust collector 10, thereby reducing safety hazards.
[0033] In some embodiments, since the dust collected by the cyclone dust collector 10 is roughly equivalent to the production capacity of the clinker kiln 200, each clinker kiln 200 is equipped with two cyclone dust collectors 10, which are connected in parallel at the gas outlet of the clinker kiln 200 to improve dust recovery efficiency.
[0034] In some embodiments, such as Figure 3As shown, the filter device 40 is provided with a plurality of filter holes 402, the maximum diameter of the filter holes 402 being less than or equal to the minimum inner diameter of the dust collection pipe 20.
[0035] Understandably, the maximum aperture of the filter hole 402 can be slightly smaller than the minimum inner diameter of the dust collection pipe 20 to prevent debris larger than the minimum inner diameter of the dust collection pipe 20 from entering the dust collection pipe 20 and causing blockage of the dust collection pipe 20 or the airlock valve 30. Alternatively, the maximum aperture of the filter hole 402 can be equal to the minimum inner diameter of the dust collection pipe 20 to prevent debris larger than the minimum inner diameter of the dust collection pipe 20 from entering the dust collection pipe 20 and causing blockage of the dust collection pipe 20 or the airlock valve 30.
[0036] Meanwhile, the maximum aperture of the filter hole 402 is less than or equal to the minimum inner diameter of the dust collection pipe 20, so that the filter hole 402 will not block the dust that needs to flow back to the clinker kiln 200 through the dust collection pipe 20, thereby ensuring that some dust can flow back to the clinker kiln 200 normally.
[0037] In some embodiments, the filter device 40 includes a body and a filter section. The body is disposed around the filter section and connected to the inner wall of the dust collection chamber 12. The filter section is disposed opposite to the ash discharge port 121, and the filter hole 402 is disposed in the filter section.
[0038] It is understandable that the main body can be an annular plate, and the filter part is located in the middle area of the annular plate. By connecting the main body to the inner wall of the dust collection chamber 12, the contact area between the filter device 40 and the inner wall of the dust collection chamber 12 can be increased, thereby enhancing the structural stability of the filter device 40.
[0039] In some embodiments, such as Figure 3 As shown, the filter device 40 includes a grate 401.
[0040] Understandably, the grate 401 itself has some holes that can be used as filter holes 402. At the same time, the structure of the grate 401 is relatively simple, which helps to reduce the difficulty of installation and production costs.
[0041] In some embodiments, the grate 401 can be formed by interlacing round steel bars with a diameter of 28mm. This facilitates the enhancement of the structural strength of the grate 401, and the metal material of the grate 401 can enhance its high-temperature resistance and reduce the impact of high-temperature dust on the grate 401.
[0042] In some embodiments, the airlock valve 30 is located at the narrowest point of the dust collection pipe 20, and the size of the through hole of the airlock valve 30 for dust to pass through is 200mm*180mm, and the size of the filter hole 402 on the grate 401 is 130mm*130mm.
[0043] In this way, as long as the blocky material passes through the grate 401, it will definitely pass through the airlock valve 30, and will not cause blockage of the airlock valve 30 or the bottom of the cone.
[0044] In some embodiments, the filtration device 40 includes a filter screen.
[0045] Understandably, the filter itself has some holes that can be used as filter holes 402. At the same time, the structure of the filter is relatively simple, which helps to reduce the difficulty of installation and production costs.
[0046] In some embodiments, multiple grates 401 are provided, and the multiple grates 401 are spaced apart in the depth direction of the dust collection chamber 12.
[0047] For example, the aperture of the filter holes 402 on multiple grates 401 can gradually decrease in the direction close to the ash discharge port 121. The aperture of the smallest filter hole 402 should be less than or equal to the aperture of the through hole of the airlock valve 30. In this way, multi-level filtration can be achieved through multiple grates 401.
[0048] Alternatively, the filter holes 402 on multiple grates 401 can have the same diameter to avoid damage to one of the grates 401, which would prevent the interception of material sludge, loose castables, and firebricks.
[0049] In some embodiments, such as Figure 1 As shown, in the depth direction of the dust collection bin 12, the distance from the grate 401 to the ash discharge port 121 is less than the distance from the grate 401 to the cyclone 11.
[0050] This allows the grate 401 to be positioned closer to the ash discharge port 121. Since the dust collection bin 12 is a conical bin, the ash discharge port 121 is located at the bottom of the dust collection bin 12 (the end with the smallest inner diameter). This makes it easier to reduce the size of the grate 401 and save costs.
[0051] In some embodiments, such as Figure 1 As shown, the air inlet 111 and the air outlet 112 are both located at the end of the cyclone 11 away from the dust collection bin 12.
[0052] This allows the air inlet 111 and the air outlet 112 to be located at the end of the cyclone 11 away from the dust collection bin 12, that is, the air inlet 111 and the air outlet 112 are respectively located at both ends of the cyclone dust collector 10, thereby reducing the difficulty of setting the air inlet 111 and the air outlet 112, avoiding interference between the air inlet 111 and the air outlet 112 and the ash discharge port 121, and thus facilitating the setting of the air inlet pipe connected to the air inlet 111 and the air outlet pipe connected to the air outlet 112.
[0053] In some embodiments, such as Figure 1As shown, the clinker kiln dust collection device 100 also includes an exhaust fan 50 and an electrostatic precipitator 60, with the exhaust fan 50 connected between the air outlet 112 and the inlet of the electrostatic precipitator 60.
[0054] In this way, the exhaust gas separated by the cyclone dust collector 10 can be drawn into the electrostatic precipitator 60 by the exhaust fan 50, so that the dust can be collected again by the electrostatic precipitator 60, thereby enabling the exhaust gas to meet the emission standards.
[0055] In some embodiments, such as Figure 2 As shown, the clinker kiln dust collection device 100 also includes: a door 70, and a dust collection bin 12 is provided with an opening (not shown in the figure) communicating with the interior of the dust collection bin 12. The door 70 is connected to the dust collection bin 12 and is used to open or close the opening; wherein, the opening is located on the side of the filter device 40 away from the ash discharge port 121.
[0056] In this way, when the cyclone dust collector 10 has been working for a period of time or is blocked, the operator can pull the door 70 to open the opening during the kiln shutdown time, and then use a hook to clean out the large pieces on the grate 401 to ensure that there are no large pieces blocking the airlock valve 30. Then the door 70 is closed to close the opening, thereby ensuring the sealing of the dust collection chamber 12.
[0057] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0059] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0060] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0062] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A dust collecting device (100) for a clinker kiln, characterized in that, The cyclone dust collector (10) comprises a cyclone barrel (11) having an air inlet (111) and an air outlet (112), and a dust collecting bin (12) connected to the cyclone barrel (11) and open towards the cyclone barrel (11). The dust collecting pipe (20) is in communication with the dust discharging port (121) of the dust collecting bin (12) at one end and is used to communicate with the clinker kiln (200) at the other end. The air locking valve (30) is arranged in the dust collecting pipe (20). The dust collecting bin (12) is provided with a filter device (40) arranged opposite to the dust discharging port (121). The filter device (40) is provided with a plurality of filter holes (402), and the maximum diameter of the filter holes (402) is less than or equal to the minimum inner diameter of the dust collecting pipe (20).
2. The clinker kiln dust collection device (100) according to claim 1, characterized in that, The filter device (40) comprises a body part and a filter part, the body part is arranged around the filter part and is connected to the inner wall of the dust collecting bin (12), the filter part is arranged opposite to the dust discharging port (121), and the filter holes (402) are arranged in the filter part.
3. The clinker kiln dust collection device (100) according to claim 2, characterized in that, The filter device (40) comprises a grate (401).
4. The clinker kiln dust collection device (100) according to claim 2, characterized in that, The filter device (40) comprises a filter screen.
5. The clinker kiln dust collection device (100) according to claim 2, characterized in that, The grate (401) is provided with a plurality of grates (401) arranged in the depth direction of the dust collecting bin (12).
6. The clinker kiln dust collection device (100) according to claim 4, characterized in that, In the depth direction of the dust collecting bin (12), the distance from the grate (401) to the dust discharging port (121) is less than the distance from the grate (401) to the cyclone barrel (11).
7. The clinker kiln dust collection device (100) according to claim 4, characterized in that, The air inlet (111) and the air outlet (112) are arranged at one end of the cyclone barrel (11) away from the dust collecting bin (12).
8. The clinker kiln dust collection device (100) according to claim 1, characterized in that, Further comprising:
9. The clinker kiln dust collection device (100) according to claim 8, characterized in that, An exhaust fan (50) and an electric dust collector (60), the exhaust fan (50) is in communication between the air outlet (112) and the inlet of the electric dust collector (60). Further comprising:
10. The kiln dust collection device (100) according to any one of claims 1-9, characterized in that, A door body (70), the dust collecting bin (12) is provided with an opening hole in communication with the inside of the dust collecting bin (12), the door body (70) is connected to the dust collecting bin (12) and is used to open or close the opening hole; The opening hole is arranged on the side of the filter device (40) away from the dust discharging port (121).