A rotary kiln tail dust collector

Abstract

The utility model discloses a rotary kiln kiln tail dust remover relates to kiln tail dust remover technical field, including dust remover body, dust remover body includes dust removal box body, and the top fixedly connected with auxiliary box body of dust removal box body has the ash bucket of fixed intercommunication of bottom of dust removal box body. The utility model discloses a rotary kiln kiln tail dust remover, through setting particulate matter sensor, upper dust removal filter pipe and third communication pipe, when lower dust removal filter bag breaks, dust enters the upper end of dust removal box body, at this moment, when particulate matter sensor detects that dust amount is larger, dust remover automatic emergency treatment is carried out, avoids lower dust removal filter bag breakage, leads to the whole need to clean and overhaul, improves the ability of device to cope with the failure, through pulse airflow blowing and vibration combination, improves the cleaning effect of dust on lower dust removal filter pipe, in addition, the scraping of scraper in ash bucket upper end inner wall is convenient for the dust accumulation of adhesion in ash bucket inner wall, and dust is affected by gravity, and falls through ash bucket.

Description

Technical Field

[0001] This utility model relates to the technical field of kiln tail dust collectors, and more specifically, to a rotary kiln tail dust collector. Background Technology

[0002] Rotary kilns, as core thermal equipment in building materials, metallurgy, and chemical industries, are widely used in production processes such as cement clinker calcination, metal mineral roasting, and hazardous waste treatment. During operation, materials undergo a series of physicochemical changes—drying, preheating, sintering, and cooling—within the high-temperature rotating kiln body. This process generates a large amount of flue gas, known as kiln tail gas, which is characterized by high dust concentration, fine dust particles, complex gas composition, and large temperature fluctuations. Direct emission would not only cause severe air pollution but also waste dust resources; therefore, it must be purified using efficient dust removal equipment. Currently, pulse jet dust collectors are the primary dust removal equipment used in industry for rotary kiln tail gas. However, when a rotary kiln starts up or shuts down, or experiences abnormal operating conditions (such as a sudden rise in flue gas temperature or a sudden change in dust concentration), the dust removal efficiency of the upstream electrostatic precipitator fluctuates significantly. This can easily lead to a sudden increase in the load on the downstream filter bags, exceeding their design capacity and causing filter bag damage. Once the filter bags are damaged, it is difficult for workers to enter the dust collector to replace them. The only option is to reduce the system load to decrease the amount of flue gas generated. Workers can only enter the dust collector to replace the bags after the internal temperature has decreased. Therefore, the bag replacement cycle is long, the period of excessive emissions is prolonged, and the working environment for workers is harsh. Utility Model Content

[0003] The main purpose of this utility model is to provide a rotary kiln tail dust collector, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A rotary kiln tail dust collector includes a dust collector body, which includes a dust collection box. An auxiliary box is fixedly connected to the top of the dust collection box, and a dust hopper is fixedly connected to the bottom of the dust collection box. A lower fixed plate is fixedly connected to the upper part of the dust collection box, and multiple lower dust collection filter tubes are detachably installed inside the lower fixed plate. A lower blowpipe is fixedly connected to the upper part of the dust collection box, and the lower blowpipe is located above the lower dust collection filter tubes. An upper fixed plate is fixedly connected to the inside of the auxiliary box, and multiple upper dust collection filter tubes are detachably installed inside the upper fixed plate. An upper blowpipe is fixedly connected to the upper part of the auxiliary box. The blowpipe is located above the upper dust collector filter pipe. A first connecting pipe is provided at the upper right end of the dust collector housing. A second connecting pipe is fixedly connected to the middle of the first connecting pipe. A second solenoid valve is provided inside the second connecting pipe. A first solenoid valve is provided at the lower end of the first connecting pipe. A third connecting pipe is provided at the right end of the dust collector housing. A third solenoid valve is provided at the upper end of the third connecting pipe. A fourth solenoid valve is provided at the lower end of the third connecting pipe. An exhaust pipe is fixedly connected to the side of the third connecting pipe. A cleaning device is provided at the upper end of the ash hopper. A particulate matter sensor is provided at the upper end of the interior of the dust collector housing and is located above the lower fixed plate.

[0005] Preferably, the upper end of the first connecting pipe is connected to the auxiliary box and located below the upper fixed plate, the lower end of the first connecting pipe is connected to the dust removal box and located below the lower fixed plate, the second connecting pipe is connected to the dust removal box and located above the lower fixed plate, the upper end of the third connecting pipe is connected to the auxiliary box and located above the upper fixed plate, and the lower end of the third connecting pipe is connected to the dust removal box and located above the lower fixed plate.

[0006] Preferably, an air tank is fixedly connected to the upper end of the side of the dust collector, and a pulse tube is fixedly connected to the top of the air tank. The upper and lower ends of the pulse tube are respectively connected to an upper jet pipe and a lower jet pipe. An upper air valve is provided on the side of the upper jet pipe, and a lower air valve is provided on the side of the lower jet pipe. A limit ring is fixedly connected to the lower end of the inner wall of the dust collector. An air inlet pipe is fixedly connected to one end of the bottom of the dust collector, and a bottom frame is fixedly connected to the inside of the ash hopper.

[0007] Preferably, the cleaning device includes a rotary motor, which is fixedly installed on the top of the bottom frame. The output end of the rotary motor is fixedly connected to a rotating shaft. A rotating frame is fixedly sleeved on the top of the rotating shaft. Multiple top balls are rotatably installed inside the rotating frame. A scraper is fixedly sleeved on the lower end of the rotating shaft. The rotating frame is rotatably installed inside a limiting ring. The scraper is rotatably installed on the upper end of the inner wall of the ash hopper.

[0008] Preferably, the lower dust collector filter tube includes a lower filter bag frame, a lower dust collector filter bag is sleeved on the outer surface of the lower filter bag frame, a lower U-tube is fixedly connected to the top of the lower filter bag frame, a support frame is fixedly connected to the bottom of the lower filter bag frame, a fixed tube is fixedly connected to the bottom of the support frame, a movable rod is movably sleeved on the bottom of the fixed tube and the support frame, a striking ball is fixedly connected to the top of the movable rod, a ball bearing is rotatably installed on the bottom of the movable rod, a baffle is fixedly sleeved on the lower end of the movable rod, a return spring is movably sleeved on the outer surface of the upper end of the movable rod, the return spring is located between the fixed tube and the baffle, and the ball bearing is movably installed on the top of the striking ball.

[0009] Preferably, the upper dust collector filter tube includes an upper filter bag frame, an upper venturi tube is fixedly connected to the top of the upper filter bag frame, and an upper dust collector filter bag is fitted on the outer surface of the upper filter bag frame.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a particulate matter sensor, an upper dust collector filter pipe, and a third connecting pipe, when the lower dust collector filter bag breaks and dust enters the upper part of the dust collector box, the particulate matter sensor detects a large amount of dust and controls the second solenoid valve to open, the fourth solenoid valve to close, and the third solenoid valve to open via an electrical signal. The damaged dust-laden gas is then filtered again through the upper dust collector filter pipe. The dust collector automatically performs emergency treatment to avoid the lower dust collector filter bag breaking, which would require overall cleaning and maintenance, thus improving the device's ability to cope with faults. 2. By setting up a cleaning device, the rotating frame rotates at the bottom of the lower dust collector filter tube. When the top ball rotates to the bottom of the movable rod, the top ball squeezes the ball bearings. Through the reaction force of the return spring, the striking ball descends and strikes the fixed tube and the lower filter bag frame, causing the lower dust collector filter tube to vibrate. The combination of pulse airflow blowing and vibration improves the cleaning effect of dust on the lower dust collector filter tube. In addition, the scraping of the scraper on the inner wall of the upper end of the ash hopper facilitates the accumulation of dust adhering to the inner wall of the ash hopper. The dust falls through the ash hopper due to gravity. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the dust collector structure of this utility model; Figure 3 This is a schematic diagram of the cleaning device structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the dust collector of this utility model; Figure 5 This is a schematic diagram of the lower dust removal filter tube structure of this utility model; Figure 6 For the present utility model Figure 5 Schematic diagram of the structure at point A in the middle; Figure 7 This is a schematic diagram of the upper dust removal filter tube structure of this utility model.

[0012] The attached diagram is labeled as follows: 1. Dust collector body; 2. Cleaning device; 11. Dust collector housing; 12. Auxiliary housing; 13. Ash hopper; 14. Lower fixed plate; 15. Lower dust collector filter pipe; 16. Lower blowpipe; 17. Upper fixed plate; 18. Upper dust collector filter pipe; 19. Upper blowpipe; 110. First connecting pipe; 111. First solenoid valve; 112. Second connecting pipe; 113. Second solenoid valve; 114. Third connecting pipe; 115. Third solenoid valve; 116. Exhaust pipe; 117. Fourth solenoid valve; 118. Bottom frame; 119. Limiting ring; 120. Air inlet. 121. Air manifold; 122. Pulse tube; 123. Upper vent valve; 124. Lower vent valve; 125. Particulate matter sensor; 151. Lower filter bag frame; 152. Lower venturi tube; 153. Lower dust collector filter bag; 154. Support frame; 155. Fixed tube; 156. Movable rod; 157. Baffle; 158. Striking ball; 159. Return spring; 160. Ball bearing; 181. Upper filter bag frame; 182. Upper venturi tube; 183. Upper dust collector filter bag; 21. Rotary motor; 22. Rotating shaft; 23. Scraper; 24. Rotating frame; 25. Top ball. Detailed Implementation

[0013] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0014] As attached Figure 1 To be continued Figure 7As shown, an embodiment of this utility model provides a rotary kiln tail dust collector, including a dust collector body 1 and a cleaning device 2. The dust collector body 1 includes a dust collection box 11, an auxiliary box 12 fixedly connected to the top of the dust collection box 11, and a dust hopper 13 fixedly connected to the bottom of the dust collection box 11. A lower fixed plate 14 is fixedly connected to the upper end of the interior of the dust collection box 11, and multiple lower dust collection filter pipes 15 are detachably installed inside the lower fixed plate 14. A lower jet pipe 16 is fixedly connected to the upper end of the interior of the dust collection box 11, and the lower jet pipe 16 is located above the lower dust collection filter pipes 15. An upper fixed plate 17 is fixedly connected to the interior of the auxiliary box 12, and multiple upper dust collection filter pipes 18 are detachably installed inside the upper fixed plate 17. An upper jet pipe 19 is fixedly connected to the upper end of the interior of the auxiliary box 12. The blowpipe 19 is located above the upper dust removal filter pipe 18. A first connecting pipe 110 is provided at the upper right end of the dust removal box 11. A second connecting pipe 112 is fixedly connected to the middle of the first connecting pipe 110. A second solenoid valve 113 is provided inside the second connecting pipe 112. A first solenoid valve 111 is provided at the lower end of the first connecting pipe 110. A third connecting pipe 114 is provided at the right end of the dust removal box 11. A third solenoid valve 115 is provided at the upper end of the third connecting pipe 114. A fourth solenoid valve 117 is provided at the lower end of the third connecting pipe 114. An exhaust pipe 116 is fixedly connected to the side of the third connecting pipe 114. The cleaning device 2 is located at the upper end of the ash hopper 13. A particulate matter sensor 125 is provided at the upper end of the interior of the dust removal box 11 and is located above the lower fixed plate 14.

[0015] The upper end of the first connecting pipe 110 is connected to the auxiliary box 12 and is located below the upper fixing plate 17. The lower end of the first connecting pipe 110 is connected to the dust removal box 11 and is located below the lower fixing plate 14. The second connecting pipe 112 is connected to the dust removal box 11 and is located above the lower fixing plate 14. The upper end of the third connecting pipe 114 is connected to the auxiliary box 12 and is located above the upper fixing plate 17. The lower end of the third connecting pipe 114 is connected to the dust removal box 11 and is located above the lower fixing plate 14.

[0016] Specifically, the dust-laden gas enters through the inlet pipe 120 of the dust collector and then enters the filter chambers where each lower dust collector filter pipe 15 is located. Under the force of gravity and rising airflow, larger dust particles fall directly to the bottom of the ash hopper 13 due to inertia, while finer dust particles are captured by the micropores on the surface of the lower dust collector filter bag 153. The purified gas enters the upper part of the dust collector chamber 11. At this time, the fourth solenoid valve 117 opens and the second solenoid valve 113 closes. The purified gas is finally discharged from the exhaust pipe 116. When the lower dust collector filter bag 153 breaks, dust enters the upper part of the dust collector chamber 11. When the particulate matter sensor 125 detects a large amount of dust, it controls the second solenoid valve 113 to open, the fourth solenoid valve 117 to close, and the third solenoid valve 115 to open via an electrical signal. The damaged dust-laden gas is filtered again through the upper dust collector filter tube 18 and discharged from the exhaust pipe 116 through the upper end of the third connecting pipe 114. When the lower dust collector filter tube 15 breaks, the dust collector automatically performs emergency treatment to prevent the lower dust collector filter bag 153 from breaking, which would require overall cleaning and maintenance, thus improving the device's ability to cope with faults.

[0017] like Figures 5-6 As shown, the lower dust collector filter pipe 15 includes a lower filter bag frame 151, a lower dust collector filter bag 153 is sleeved on the outer surface of the lower filter bag frame 151, a lower U-tube 152 is fixedly connected to the top of the lower filter bag frame 151, a support frame 154 is fixedly connected to the bottom of the lower filter bag frame 151, a fixed pipe 155 is fixedly connected to the bottom of the support frame 154, a movable rod 156 is movably sleeved on the bottom of the fixed pipe 155 and the support frame 154, a striking ball 158 is fixedly connected to the top of the movable rod 156, a ball bearing 160 is rotatably installed on the bottom of the movable rod 156, a baffle 157 is fixedly sleeved on the lower end of the movable rod 156, a return spring 159 is movably sleeved on the outer surface of the upper end of the movable rod 156, the return spring 159 is located between the fixed pipe 155 and the baffle 157, and the ball bearing 160 is movably installed on the top of the top ball 25.

[0018] like Figure 7 As shown, the upper dust removal filter tube 18 includes an upper filter bag frame 181, an upper venturi tube 182 is fixedly connected to the top of the upper filter bag frame 181, and an upper dust removal filter bag 183 is sleeved on the outer surface of the upper filter bag frame 181.

[0019] like Figure 4As shown, an air tank 121 is fixedly connected to the upper end of the side of the dust collector 11. A pulse pipe 122 is fixedly connected to the top of the air tank 121. The upper and lower ends of the pulse pipe 122 are respectively connected to the upper blow pipe 19 and the lower blow pipe 16. An upper air valve 123 is provided on the side of the upper blow pipe 19, and a lower air valve 124 is provided on the side of the lower blow pipe 16. A limit ring 119 is fixedly connected to the lower end of the inner wall of the dust collector 11. An air inlet pipe 120 is fixedly connected to one end of the bottom of the dust collector 11. A bottom frame 118 is fixedly connected inside the ash hopper 13.

[0020] like Figure 3 As shown, the cleaning device 2 includes a rotary motor 21, which is fixedly installed on the top of the bottom frame 118. The output end of the rotary motor 21 is fixedly connected to a rotating shaft 22. A rotating frame 24 is fixedly sleeved on the top of the rotating shaft 22. Multiple top balls 25 are rotatably installed inside the rotating frame 24. A scraper 23 is fixedly sleeved on the lower end of the rotating shaft 22. The rotating frame 24 is rotatably installed inside the limiting ring 119. The scraper 23 is rotatably installed on the upper end of the inner wall of the ash hopper 13.

[0021] Specifically, when the rotary motor 21 controls the rotating shaft 22 to drive the rotating frame 24 to rotate inside the limiting ring 119, causing the rotating frame 24 to rotate at the bottom of the lower dust collector filter tube 15, and the top ball 25 rotates to below the movable rod 156, the top ball 25 squeezes the ball 160, causing the movable rod 156 to drive the baffle 157 and the striking ball 158 to rise. At this time, the return spring 159 is compressed. When the top ball 25 passes the ball 160, the reaction force of the return spring 159 causes the striking ball 160 to rise. The 58 descends and strikes the fixed tube 155 and the lower filter bag frame 151, causing the lower dust collector filter tube 15 to vibrate, which facilitates the removal of dust adhering to the outer surface of the lower dust collector filter bag 153. The combination of pulse airflow blowing and vibration improves the cleaning effect of dust on the lower dust collector filter tube 15. In addition, the scraper 23 follows the rotation of the rotating shaft 22. The scraper 23 scrapes the inner wall of the upper end of the ash hopper 13, which facilitates the accumulation of dust adhering to the inner wall of the ash hopper 13. The dust is affected by gravity and falls through the ash hopper 13.

[0022] The working process of this utility model is as follows: Dust-laden gas enters the dust collector through the inlet pipe 120 and flows into the filter chambers where the lower dust collector filter pipes 15 are located. Under the influence of gravity and the upward force of the airflow, larger dust particles fall directly into the bottom of the ash hopper 13 due to inertia, while fine dust particles are captured by the micropores on the surface of the lower dust collector filter bags 153. The purified gas enters the upper part of the dust collector housing 11. At this time, the fourth solenoid valve 117 opens and the second solenoid valve 113 closes. The purified gas is finally discharged from the exhaust pipe 116. When the lower dust collector filter bags 153 break, dust enters the upper part of the dust collector housing 11. At this time, when the particulate matter sensor 125 detects a large amount of dust, it controls the second solenoid valve 113 to open, the fourth solenoid valve 117 to close, and the third solenoid valve 115 to open via an electrical signal. The broken dust-laden gas is filtered again through the upper dust collector filter pipe 18 and discharged from the exhaust pipe 116 through the upper part of the third connecting pipe 114. As operating time increases, more dust accumulates on the surface of the filter bags. When cleaning the filter bags, the lower vent valve 124 is opened, and high-pressure airflow passes through the lower blowpipe 16 to pulse-blow the interior of the lower dust collector filter tube 15 to remove the dust adhering to the lower dust collector filter bag 153. In addition, when the lower dust collector filter tube 15 breaks, the lower vent valve 124 is closed, the upper vent valve 123 is opened, and the second solenoid valve 113 is closed, so that high-pressure airflow passes through the upper blowpipe 19 to pulse-blow the interior of the upper dust collector filter tube 18 to remove the dust adhering to the upper dust collector filter tube 18, and the dust enters the interior of the dust collector box 11 through the first connecting pipe 110.

[0023] Furthermore, when the rotary motor 21 controls the rotating shaft 22 to drive the rotating frame 24 to rotate inside the limiting ring 119, causing the rotating frame 24 to rotate at the bottom of the lower dust collector filter tube 15, and the top ball 25 rotates to below the movable rod 156, the top ball 25 squeezes the ball 160, causing the baffle 157 to rise along with the striking ball 158. At this time, the return spring 159 is compressed. When the top ball 25 passes the ball 160, the reaction force of the return spring 159 causes the striking ball 158 to... The 8-axis descends and strikes the fixed tube 155 and the lower filter bag frame 151, causing the lower dust collector filter tube 15 to vibrate, which facilitates the removal of dust adhering to the outer surface of the lower dust collector filter bag 153. The combination of pulse airflow blowing and vibration improves the cleaning effect of dust on the lower dust collector filter tube 15. In addition, the scraper 23 follows the rotation of the rotating shaft 22. The scraper 23 scrapes the inner wall of the upper end of the ash hopper 13, which facilitates the accumulation of dust adhering to the inner wall of the ash hopper 13. The dust is affected by gravity and falls through the ash hopper 13.

[0024] Finally, it should be noted that: the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotary kiln tail dust collector, comprising a dust collector body (1), characterized in that: The dust collector body (1) includes a dust collection box (11), an auxiliary box (12) is fixedly connected to the top of the dust collection box (11), a dust hopper (13) is fixedly connected to the bottom of the dust collection box (11), a lower fixed plate (14) is fixedly connected to the upper end of the interior of the dust collection box (11), a plurality of lower dust collection filter tubes (15) are detachably installed inside the lower fixed plate (14), a lower blow pipe (16) is fixedly connected to the upper end of the interior of the dust collection box (11), the lower blow pipe (16) is located above the lower dust collection filter tubes (15), an upper fixed plate (17) is fixedly connected to the interior of the auxiliary box (12), a plurality of upper dust collection filter tubes (18) are detachably installed inside the upper fixed plate (17), an upper blow pipe (19) is fixedly connected to the upper end of the interior of the auxiliary box (12), the upper blow pipe (19) is located above the upper dust collection filter tubes (18). The upper right side of the dust collector (11) is provided with a first connecting pipe (110), the middle part of the first connecting pipe (110) is fixedly connected to a second connecting pipe (112), the interior of the second connecting pipe (112) is provided with a second solenoid valve (113), the lower end of the first connecting pipe (110) is provided with a first solenoid valve (111), the right end of the dust collector (11) is provided with a third connecting pipe (114), the upper end of the third connecting pipe (114) is provided with a third solenoid valve (115), the lower end of the third connecting pipe (114) is provided with a fourth solenoid valve (117), the side of the third connecting pipe (114) is fixedly connected to an exhaust pipe (116), the upper end of the ash hopper (13) is provided with a cleaning device (2), and the upper end of the interior of the dust collector (11) is provided with a particulate matter sensor (125), which is located above the lower fixed plate (14).

2. The rotary kiln tail dust collector according to claim 1, characterized in that: The upper end of the first connecting pipe (110) is connected to the auxiliary box (12) and is located below the upper fixed plate (17). The lower end of the first connecting pipe (110) is connected to the dust removal box (11) and is located below the lower fixed plate (14). The second connecting pipe (112) is connected to the dust removal box (11) and is located above the lower fixed plate (14). The upper end of the third connecting pipe (114) is connected to the auxiliary box (12) and is located above the upper fixed plate (17). The lower end of the third connecting pipe (114) is connected to the dust removal box (11) and is located above the lower fixed plate (14).

3. A rotary kiln tail dust collector according to claim 2, characterized in that: An air tank (121) is fixedly connected to the upper end of the side of the dust collector (11). A pulse pipe (122) is fixedly connected to the top of the air tank (121). The upper and lower ends of the pulse pipe (122) are respectively connected to the upper blow pipe (19) and the lower blow pipe (16). An upper air valve (123) is provided on the side of the upper blow pipe (19), and a lower air valve (124) is provided on the side of the lower blow pipe (16). A limit ring (119) is fixedly connected to the lower end of the inner wall of the dust collector (11). An air inlet pipe (120) is fixedly connected to one end of the bottom of the dust collector (11). A bottom frame (118) is fixedly connected inside the ash hopper (13).

4. A rotary kiln tail dust collector according to claim 3, characterized in that: The cleaning device (2) includes a rotary motor (21), which is fixedly installed on the top of the bottom frame (118). The output end of the rotary motor (21) is fixedly connected to a rotating shaft (22). A rotating frame (24) is fixedly sleeved on the top of the rotating shaft (22). Multiple top balls (25) are rotatably installed inside the rotating frame (24). A scraper (23) is fixedly sleeved on the lower end of the rotating shaft (22). The rotating frame (24) is rotatably installed inside the limiting ring (119). The scraper (23) is rotatably installed on the upper end of the inner wall of the ash hopper (13).

5. A rotary kiln tail dust collector according to claim 4, characterized in that: The lower dust collector filter pipe (15) includes a lower filter bag frame (151), a lower dust collector filter bag (153) is sleeved on the outer surface of the lower filter bag frame (151), a lower U-tube (152) is fixedly connected to the top of the lower filter bag frame (151), a support frame (154) is fixedly connected to the bottom of the lower filter bag frame (151), a fixing pipe (155) is fixedly connected to the bottom of the support frame (154), and a movable rod is movably sleeved between the bottom of the fixing pipe (155) and the support frame (154). 156), the top of the movable rod (156) is fixedly connected to a striking ball (158), the bottom of the movable rod (156) is rotatably mounted with a ball (160), the lower end of the movable rod (156) is fixedly sleeved with a baffle (157), the outer surface of the upper end of the movable rod (156) is movably sleeved with a return spring (159), the return spring (159) is located between the fixed tube (155) and the baffle (157), and the ball (160) is movably mounted on the top of the top ball (25).

6. A rotary kiln tail dust collector according to claim 1, characterized in that: The upper dust removal filter tube (18) includes an upper filter bag frame (181), an upper venturi tube (182) is fixedly connected to the top of the upper filter bag frame (181), and an upper dust removal filter bag (183) is fitted on the outer surface of the upper filter bag frame (181).

Images