A lepidolite roasting flue gas treatment device and its treatment method

Abstract

The present invention relates to the technical field of flue gas treatment, and specifically to a lithium mica roasting flue gas treatment device and its treatment method, which includes a treatment chamber provided with a baffle structure. The treatment chamber is successively provided with a pretreatment structure and a centralized collection structure from top to bottom, and the pretreatment structure is located below the baffle structure; a gas inlet is provided on the side wall of the treatment chamber, and the gas inlet is located between the pretreatment structure and the centralized collection structure. Before the flue gas enters the baffle structure, the present invention first intercepts the droplets and particulate matters in the flue gas through the pretreatment structure, reduces the concentration of droplets and particulate matters in the flue gas, and the pretreatment structure will timely clean the intercepted droplets and particulate matters, and at the same time will prompt the intercepted matters on the baffle structure to fall, effectively avoiding the blockage of the baffle structure. In addition, the flue gas does not pass through the centralized collection structure, effectively avoiding the secondary entrainment of intercepted matters by the flue gas.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment, and particularly to a lithium mica roasting flue gas treatment device and a treatment method thereof. Background Art

[0002] In the process of treating lithium mica roasting flue gas, in order to ensure that the cleanliness of the discharged gas meets the environmental protection standards, a baffle demisting structure is usually arranged in the middle and rear sections (after the wet scrubbing tower) of the flue gas treatment system to intercept and remove the liquid droplets and particulate matters in the flue gas, ensuring the cleanliness of the discharged gas. The baffle demisting structure changes the flow direction of the flue gas and uses inertia force to make the liquid droplets and solid particles collide with and adhere to the baffle, thereby achieving the effect of intercepting the solid particles and liquid droplets in the flue gas, which is one of the key links to ensure the quality of flue gas treatment.

[0003] At present, there are still obvious deficiencies in the treatment technology in the middle and rear sections of the existing flue gas treatment system. On the one hand, the pre-treated flue gas is usually directly input into the baffle demisting structure for demisting in a bottom-up flow-through manner. Its demisting effect depends heavily on the pre-treatment effect. When the concentration of solid particles and liquid droplets in the flue gas increases due to the reduction of the pre-treatment effect, the working pressure of the baffle demisting structure increases significantly, resulting in a substantial decrease in the demisting efficiency. At the same time, during the treatment process, the removed substances continuously accumulating on the baffle will block the flow channel, further reducing the demisting effect and making it difficult to ensure stable and reliable continuous demisting work. On the other hand, the gas mostly adopts a one-way flow-through manner from bottom to top. In this way, the removed liquid droplets and particulate matters adhere to the baffle demisting structure and will automatically fall as the accumulated weight increases, extremely likely to re-enter the gas flow, causing secondary pollution and further increasing the pollutant concentration in the gas, making it difficult for the cleanliness of the final discharged gas to reach the ideal standard.

[0004] Therefore, there is an urgent need for a technology that can overcome the above defects to improve the treatment capacity in the middle and rear sections of the lithium mica roasting flue gas treatment system, ensure the stability, reliability and high efficiency of the demisting work, and thus ensure the cleanliness of the discharged gas. Summary of the Invention

[0005] The present invention provides a lithium mica roasting flue gas treatment device and a treatment method thereof to solve the problem of low stability and reliability in the demisting process in related technologies.

[0006] The present invention provides a lithium mica roasting flue gas treatment device, which includes a treatment chamber provided with a baffle structure. A pretreatment structure and a centralized collection structure are sequentially arranged in the treatment chamber from top to bottom, and the pretreatment structure is located below the baffle structure; an air inlet is provided on the side wall of the treatment chamber, and the air inlet is located between the pretreatment structure and the centralized collection structure, so that the flue gas does not pass through the centralized collection structure; the pretreatment structure includes: a rotating disk, on the surface of which a plurality of through holes are evenly distributed, and inclined intercepting plates are limited and hinged at the lower ports of the through holes; a plurality of scraping plates, which are distributed along the circumference of the rotating disk and are elastically slidably arranged on the centralized collection structure; the intercepting plates rotate with the rotating disk and cycle through the scraping plates, the scraping plates contact the lower surface of the intercepting plates, and the intercepting plates are rotated to the limit points, and the scraping plates slide under the limitation of the intercepting plates. When the intercepting plates are separated from the scraping plates, the two reset respectively; a abutting member, which is elastically hinged to the upper end of the rotating disk, the abutting member keeps in contact with the bottom of the baffle structure, and periodically knocks the baffle structure as the rotating disk rotates.

[0007] In a possible implementation manner, the scraping plates are inclined in the rotation direction of the rotating disk.

[0008] In a possible implementation manner, the upper surface of the rotating disk is concave with the middle being low and the periphery being high, and a guiding channel is provided at the center of the rotating disk, and the guiding channel directly guides the intercepted objects intercepted by the baffle structure into the centralized collection structure.

[0009] In a possible implementation manner, an isolation channel is communicated with the upper port of the through hole, and the upper end air outlet of the isolation channel is higher than the highest point of the upper surface of the rotating disk.

[0010] In a possible implementation manner, the centralized collection structure is a conical annular plate, and the annular plate divides the treatment chamber into upper and lower parts. The lower part is the centralized collection area, and the scraping plates penetrate through the annular plate up and down, and the end of the scraping plate below the annular plate is elastically connected to the annular plate.

[0011] In a possible implementation manner, an installation frame is arranged between the intercepting plate and the rotating disk, the installation frame is detachably installed at the bottom of the rotating disk, one end of the intercepting plate is hinged to the installation frame, the other end of the intercepting plate is fixedly connected with a limiting column, and an arc-shaped limiting track is arranged on the installation frame, and the limiting column slides along the arc-shaped limiting track.

[0012] In a possible implementation manner, a spring guide post is fixedly connected to the lower end of the centralized collection structure, and a sliding block is fixedly connected to the scraping plate, and the sliding block is slidably connected to the spring guide post.

[0013] The method for treating the roasted lithium mica flue gas by the above-mentioned roasted lithium mica flue gas treatment equipment is as follows: When the flue gas enters the treatment chamber from the air inlet, it successively passes through the pretreatment structure and the baffle structure. The pretreatment structure initially intercepts the droplets and particulate matters in the gas and timely clears the intercepted droplets and particulate matters.

[0014] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following technical effects: For a roasted lithium mica flue gas treatment equipment provided by an embodiment of the present invention, when the flue gas enters the treatment chamber from the side and before entering the baffle structure, it first passes through the pretreatment structure to initially intercept the droplets and particulate matters in the flue gas, reduce the concentration of droplets and particulate matters in the flue gas, ensure that the cleanliness of the flue gas after the demisting treatment by the baffle structure meets the environmental protection standards, and the pretreatment structure will timely clear the intercepted droplets and particulate matters during the working process, and at the same time will cause the intercepted matters on the baffle structure to fall, effectively avoiding the blockage of the baffle structure, enabling the pretreatment structure and the baffle structure to maintain a highly efficient and stable working state for a long time, ensuring that the flue gas treatment system can carry out the flue gas treatment work stably and efficiently for a long time. In addition, after the flue gas enters the treatment chamber, it successively passes through the pretreatment structure and the baffle structure and then is discharged without passing through the centralized collection structure, effectively avoiding the situation that the flue gas takes away the intercepted matters again and increases the concentration of droplets and particulate matters in the flue gas. Description of the Drawings

[0015] Figure 1 is a partial cross-sectional view of the treatment chamber of a roasted lithium mica flue gas treatment equipment provided by an embodiment of the present invention.

[0016] Figure 2 is a schematic structural view of the mounting frame and the intercepting plate of a roasted lithium mica flue gas treatment equipment provided by an embodiment of the present invention.

[0017] Figure 3 is a schematic structural view of the rotating disk and the through port of a roasted lithium mica flue gas treatment equipment provided by an embodiment of the present invention.

[0018] Figure 4 is a schematic structural view of the scraper and the centralized collection structure of a roasted lithium mica flue gas treatment equipment provided by an embodiment of the present invention from the bottom view.

[0019] In the figure: 1. Baffle structure; 2. Treatment chamber; 3. Pretreatment structure; 31. Rotating disk; 32. Through port; 33. Intercepting plate; 34. Scraper; 35. Abutting member; 36. Guiding channel; 37. Isolation channel; 38. Mounting frame; 4. Centralized collection structure; 5. Air inlet; 51. Main access port; 52. Annular channel; 53. Branch port; 6. Opening; 7. Outlet; 8. Limit post; 9. Arc-shaped limit track; 10. Spring guide post; 11. Slide block; 12. Connecting seat; 13. Elastic telescopic member; 14. Tooth ring. Detailed implementation manners

[0020] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe in detail the specific implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation manners disclosed below.

[0021] Please refer to Figure 1 , a lithium mica roasting flue gas treatment device, including a treatment chamber 2 provided with a baffle structure 1. An opening 6 is provided at the top of the treatment chamber 2, an outlet 7 is provided at the bottom, and an air inlet 5 is provided on the side wall. The baffle structure 1 is installed at the opening 6. A pretreatment structure 3 and a centralized collection structure 4 are successively arranged in the treatment chamber 2 from top to bottom. The pretreatment structure 3 is located below the baffle structure 1, and the air inlet 5 is located between the pretreatment structure 3 and the centralized collection structure 4. The flue gas enters the treatment chamber 2 through the air inlet 5, and then passes through the pretreatment structure 3 and the baffle structure 1 in sequence and is discharged without passing through the centralized collection structure 4, thereby effectively avoiding the situation that the flue gas passes through the centralized collection structure 4 and secondarily takes away the intercepted substances, increasing the concentration of liquid droplets and particulate matters in the flue gas. The pretreatment structure 3 initially intercepts the liquid droplets and particulate matters in the flue gas, reduces the concentration of liquid droplets and particulate matters in the flue gas, ensures that the cleanliness of the flue gas after demisting treatment by the baffle structure 1 meets the environmental protection standards, and the pretreatment structure 3 will timely clean the intercepted liquid droplets and particulate matters during operation, so that it can maintain a highly efficient and stable working state for a long time, ensuring that the flue gas treatment system can perform flue gas treatment work stably and efficiently for a long time. Among them, the air inlet 5 includes an annular channel 52 provided with a main access port 51 and several branch ports 53. The annular channel 52 is fixedly installed on the outer side wall of the treatment chamber 2. The branch ports 53 are evenly distributed along the circumferential direction of the treatment chamber 2 and connect the annular channel 52 with the treatment chamber 2. The flue gas enters the annular channel 52 through the main access port 51, and then enters the treatment chamber 2 through the branch ports 53, so that the flue gas can enter the treatment chamber 2 quickly and evenly.

[0022] Refer to Figure 1 , Figure 2 and Figure 3The pretreatment structure 3 includes a rotating disk 31 with a plurality of openings 32 evenly distributed on the surface. The rotating disk 31 is rotatably installed in the processing chamber 2 and is located above the centralized collection structure 4. The centralized collection structure 4 is fixedly installed in the processing chamber 2. An interception plate 33 arranged obliquely is limited and hinged at the lower end of the opening 32. A plurality of scrapers 34 are arranged below the rotating disk 31. The scrapers 34 are distributed along the circumference of the rotating disk 31 and are elastically slidably arranged on the centralized collection structure 4. During the flue gas treatment process, the rotating disk 31 rotates continuously at a low speed, and the interception plates 33 rotate with the flue gas. As the rotating disk 31 rotates, it passes through the scraper 34 in a cycle. In the process of the interception plate 33 passing through the scraper 34, the scraper 34 contacts the lower surface of the interception plate 33. As the rotating disk 31 rotates, the interception plate 33 will first rotate upward to the limit point under the limit of the scraper 34. At this time, the interception plate 33 cannot continue to rotate upward, and the scraper 34 will slide downward under the limit of the interception plate 33 to ensure that the interception plate 33 can smoothly pass through the scraper 34 as the rotating disk 31 rotates. During this process, the scraper 34 will continue to resist the interception plate The scraper 34 is used to scrape the intercepting plate 33 and the intercepting droplets and particles on the lower surface of the intercepting plate 33 are scraped off. The scraped droplets and particles fall directly on the centralized collection structure 4 or flow along the scraper 34 to the centralized collection structure 4, or fall on the centralized collection structure 4 under the action of the vibration force during the resetting process of the scraper 34, so that the pretreatment structure 3 can continue to maintain an efficient and stable working state; when the intercepting plate 33 passes over the scraper 34, the intercepting plate 33 automatically resets and generates a certain amplitude of vibration, which is beneficial to the droplets and particles on its surface to fall to a certain extent; the scraper 34 also generates a certain amplitude of vibration when it automatically resets, which is beneficial to the droplets and particles attached to it to fall to a certain extent, and has a certain self-cleaning effect, which is further beneficial to the pretreatment structure 3 to maintain an efficient and stable working state for a long time; wherein, the low-speed rotation of the rotating disk 31 is achieved by installing a gear ring 14 on the rotating disk 31, and then driving it through a motor (not shown in the figure) coaxially connected with a gear, and the motor drives the gear to rotate, and the gear engages with the gear ring 14 to drive the rotating disk 31 to rotate at a low speed.

[0023] See also Figure 1 and Figure 2, there is an installation frame 38 between the interception plate 33 and the rotating disk 31. The installation frame 38 is detachably installed at the bottom of the rotating disk 31. One end of the interception plate 33 close to the center of the rotating disk 31 is fixedly installed with a rotating shaft (not shown in the figure). The rotating shaft is rotatably installed on the installation frame 38, so that the interception plate 33 is hinged to the installation frame 38. A reset torsion spring (not shown in the figure) is arranged between the rotating shaft and the installation frame 38 for controlling the reset of the interception plate 33. One end of the interception plate 33 far from the center of the rotating disk 31 is fixedly connected with a limit post 8. An arc-shaped limit track 9 is arranged on the installation frame 38. The limit post 8 slides along the arc-shaped limit track 9. The center of the arc-shaped limit track 9 is on the axis of the rotating shaft. The rotation range of the interception plate 33 is restricted through the cooperation of the arc-shaped limit track 9 and the limit post 8.

[0024] Refer to Figure 1 and Figure 4 , the centralized collection structure 4 is a conical annular plate. The annular plate divides the treatment chamber 2 into upper and lower parts. The lower part is the centralized collection area. Droplets and particulate matters fall on the annular plate and gather. The gathered droplets will flow along the annular plate to the centralized collection area for collection. The scraping plate 34 is slidably installed on the annular plate and penetrates through the annular plate up and down. And a spring guide post 10 is installed at the lower end of the annular plate. A slider 11 is fixedly connected to the scraping plate 34. The slider 11 is slidably connected with the spring guide post 10. When the scraping plate 34 slides downward under the limit of the interception plate 33, the slider 11 synchronously slides along the spring guide post 10 and compresses the spring on the spring guide post 10. After the interception plate 33 is separated from the scraping plate 34, the scraping plate 34 automatically resets under the action of the resilience of the spring on the spring guide post 10.

[0025] Refer to Figure 1 and Figure 3 , an abutting member 35 is elastically hinged to the upper end of the rotating disk 31. The abutting member 35 keeps in contact with the bottom of the baffle structure 1. During the rotation of the rotating disk 31, the abutting member 35 periodically impacts the baffle structure 1 as the rotating disk 31 rotates, causing the baffle structure 1 to vibrate, which is beneficial to the falling of particulate matters and droplets attached to the baffle structure 1, and enables the baffle structure 1 to continuously maintain a highly efficient and stable working state; the baffle structure 1 includes a number of S-shaped baffle plates arranged in an array. Adjacent S-shaped baffle plates maintain a preset distance. A connecting seat 12 is fixedly installed on the rotating disk 31. The lower end of the abutting member 35 is hinged to the connecting seat 12 and the upper end keeps in contact with the bottom of the baffle structure 1. An elastic telescopic member 13 is hinged in the middle of the abutting member 35. And the elastic telescopic member 13 is hinged to the connecting seat 12. As the rotating disk 31 rotates, the abutting member 35 continuously impacts the baffle structure 1 under the action of the elastic telescopic member 13. The baffle structure 1 vibrates to a certain extent, accelerating the falling of droplets and particulate matters attached to its surface, and can avoid the situation that the baffle structure 1 is blocked due to the accumulation of intercepted objects, effectively improving the high efficiency and stability of the continuous operation of the baffle structure 1.

[0026] Refer to Figure 1 、 Figure 2 and Figure 3 , the upper surface of the rotating disk 31 is concave with a lower middle and higher periphery. A guiding channel 36 is provided at the center of the rotating disk 31. The droplets and particulate matters intercepted by the baffle structure 1 will fall on the rotating disk 31 or the guiding channel 36. The droplets falling on the rotating disk 31 gather towards the middle along the upper surface of the rotating disk 31 and finally fall into the centralized treatment area through the guiding channel 36. The guiding channel 36 directly introduces the intercepted matters intercepted by the baffle structure 1 into the centralized treatment area. Among them, some particulate matters during the flue gas treatment process will gather on the surface of the rotating disk 31 and the surface of the annular plate, and can be disassembled and cleaned regularly, or a movable automatic cleaning head is arranged in the treatment chamber 2, and the automatic cleaning head is started regularly to clean the surface of the rotating disk 31 and the surface of the annular plate by water washing or high-pressure air flow, so that the intercepted matters gather in the centralized treatment area and can be cleaned out through the bottom outlet 7.

[0027] Refer to Figure 1 、 Figure 2 and Figure 4 , the scraper 34 is inclined, and is inclined in the rotating direction of the rotating disk 31. During the process of scraping the intercepted matters attached to the surface of the intercepting plate 33 by the inclined scraper 34, the attachment of the intercepted matters to the scraper 34 can be effectively reduced.

[0028] Refer to Figure 1 and Figure 3 , an isolation channel 37 is connected to the upper port of the through port 32. The upper air outlet of the isolation channel 37 is higher than the highest point of the upper surface of the rotating disk 31. As shown in Figure 1 , the isolation channel 37 can effectively block the contact between the flue gas and the falling intercepted matters, and thus effectively avoid the intercepted droplets and particulate dust from returning to the flue gas again.

[0029] The method for treating the lithium mica roasting flue gas by the above lithium mica roasting flue gas treatment equipment is as follows: During the flue gas treatment process, the flue gas enters the treatment chamber 2 from the air inlet 5 and then passes through the pretreatment structure 3 and the baffle structure 1 in sequence and is discharged. The pretreatment structure 3 initially intercepts the droplets and particulate matters in the gas and timely cleans the intercepted droplets and particulate matters.

[0030] In an embodiment of the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] In the description of the present invention, it should also be noted that, unless otherwise clearly specified or limited, the terms "arranged", "connected", "installed" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, an integral connection or a sliding connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A lepidolite roasting flue gas treatment device, comprising a treatment chamber provided with a baffle structure, characterized in that: A pretreatment structure and a centralized collection structure are successively arranged in the processing cavity from top to bottom, and the pretreatment structure is located below the baffle structure; An air inlet is provided on the side wall of the processing cavity, and the air inlet is located between the pretreatment structure and the centralized collection structure, so that the flue gas does not pass through the centralized collection structure; The pretreatment structure includes: A rotating disk, on the surface of which a plurality of through holes are evenly distributed, and inclined intercepting plates are limit-hinged at the lower ports of the through holes; A plurality of scraping plates, which are distributed along the circumference of the rotating disk and are elastically slidably arranged on the centralized collection structure; The intercepting plate rotates and circulates past the scraping plate along with the rotating disk. The scraping plate contacts the lower surface of the intercepting plate and rotates the intercepting plate to the limit point, and the scraping plate slides under the limitation of the intercepting plate. After the intercepting plate is separated from the scraping plate, the two reset respectively; A abutting member, which is elastically hinged to the upper end of the rotating disk, keeps in contact with the bottom of the baffle structure, and periodically knocks the baffle structure as the rotating disk rotates.

2. The lithium mica roasting flue gas treatment equipment according to claim 1, characterized in that: The scraping plate is inclined in the rotating direction of the rotating disk.

3. A lepidolite roasting flue gas treatment device according to claim 1, characterized in that: The upper surface of the rotating disk is concave with the middle low and the periphery high. A guiding channel is provided at the center of the rotating disk, and the guiding channel directly guides the intercepted substances intercepted by the baffle structure into the centralized collection structure.

4. A lithium mica roasting flue gas treatment device according to claim 1, characterized in that: An isolation channel is communicated with the upper port of the through hole, and the upper end air outlet of the isolation channel is higher than the highest point of the upper surface of the rotating disk.

5. A lepidolite roasting flue gas treatment device according to claim 1, characterized in that: The centralized collection structure is a conical annular plate, and the annular plate divides the processing cavity into upper and lower parts. The lower part is the centralized collection area. The scraping plate penetrates through the annular plate up and down, and the end of the scraping plate below the annular plate is elastically connected to the annular plate.

6. The lithium mica roasting flue gas treatment equipment according to claim 1, characterized in that: An installation frame is arranged between the intercepting plate and the rotating disk. The installation frame is detachably installed at the bottom of the rotating disk. One end of the intercepting plate is hinged to the installation frame, and the other end of the intercepting plate is fixedly connected with a limit column. An arc-shaped limit track is arranged on the installation frame, and the limit column slides along the arc-shaped limit track.

7. The lithium mica roasting flue gas treatment equipment according to claim 1, characterized in that: A spring guide post is fixedly connected to the lower end of the centralized collection structure, and a sliding block is fixedly connected to the scraping plate. The sliding block is slidably connected with the spring guide post.

8. A method for treating lepidolite roasting flue gas, which is completed in cooperation with a lepidolite roasting flue gas treatment device as described in claim 1, characterized in that: The specific process is as follows: After the flue gas enters the processing cavity from the air inlet, it successively passes through the pretreatment structure and the baffle structure. The pretreatment structure initially intercepts the droplets and particulate matters in the gas and timely cleans the intercepted droplets and particulate matters.

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