Kiln tail gas treatment device and method for metal arsenic processing

Abstract

The invention discloses a kiln tail gas treatment device and method for metal arsenic processing, and relates to the technical field of tail gas purification. A first alkaline washing tower is arranged at the right end of a conveying pipe, the top of the first alkaline washing tower is connected with a second alkaline washing tower through a pipeline, a flue gas direct discharging pipe is arranged at the top of the second alkaline washing tower, an electric rotating rod is rotationally installed at the bottom of the inner wall of the first alkaline washing tower, and a plurality of inclined plates are fixedly installed on the outer wall of the electric rotating rod at equal intervals; a vertical rod is fixedly installed at the top of the electric rotating rod, and a sliding ring penetrates through and is movably installed on the outer wall of the vertical rod reciprocating spiral groove. Slurry circularly absorbed by the first alkaline washing tower and the second alkaline washing tower is sent to a metal arsenic sewage comprehensive treatment system for deep treatment, metal arsenic emission can be smaller than or equal to 0.003 mg / 3Nm, the ultra-low emission standard value of metal arsenic kiln flue gas is met, meanwhile, tail gas is sequentially added into the two alkaline washing towers through the bag-type dust collector for deep treatment, and energy conservation and consumption reduction are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas purification, and in particular to a device and method for treating tail gas from a kiln used for metal arsenic processing. Background Art

[0002] At present, the flue gas treatment process of metal arsenic smelting kilns is relatively simple. The metal arsenic emissions from the flue gas exceed the standard and pollute the environment. It must be controlled under pressure to protect the environment. For this purpose, a metal arsenic flue gas purification process technology has been specially developed to effectively control the flue gas from the metal arsenic kiln and meet the ultra-low emission requirements. This is imperative.

[0003] The patent with the patent announcement number CN213790727U discloses a tail gas purification treatment device for metal product processing, which relates to the technical field of tail gas purification equipment. The tail gas purification treatment device for metal product processing includes a bottom plate, a humidification frame is fixedly connected to the top of the bottom plate near the rear edge, and gas injection ports are opened on both sides of the center of the rear surface of the humidification frame. Atomization pipes are passed through the center of the inner wall on both sides of the humidification frame, and a pad is fixedly connected to the inside of the humidification frame below the two atomization pipes. When the tail gas purification treatment device for metal product processing is used, one end of the existing air guide hose device is firmly connected to the gas injection interface, and the other end of the existing air guide hose device is fixedly set on the side of the tail gas discharge of the metal product processing equipment, and then the tail gas can be effectively sucked into the humidification frame by starting the vacuum pump, and at the same time, it is effectively connected to the external water supply equipment through the atomization pipe, so as to effectively wet the filter cotton block.

[0004] However, the device still has some shortcomings: the device adsorbs larger solid impurities in the exhaust gas through wet filter cotton blocks, but in the process of treating the exhaust gas from metal arsenic furnaces, it is difficult to effectively remove the particulate matter in the exhaust gas, which can easily lead to harmful substances in the exhaust gas exceeding the emission standards, thereby aggravating environmental pollution. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a kiln tail gas treatment device and method for metal arsenic processing, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a kiln exhaust gas treatment device for metal arsenic processing, including a bag dust collector, a first alkali washing tower is arranged at the right end of the conveying pipe, the top of the first alkali washing tower is connected to the second alkali washing tower through a pipeline, the top of the second alkali washing tower is provided with a flue gas straight exhaust pipe, an electric rotating rod is rotatably installed at the bottom of the inner wall of the first alkali washing tower, a plurality of inclined plates are equidistantly and fixedly installed on the outer wall of the electric rotating rod, a vertical rod is fixedly installed on the top of the electric rotating rod, and the outer wall of the reciprocating spiral groove of the vertical rod is penetrated and movable A sliding ring is dynamically installed, and a plurality of cross bars are equidistantly and fixedly installed on the outer wall of the sliding ring. A cambered ring is fixedly installed on the end of the cross bar away from the sliding ring. A semicircular open shell is slidably installed on the inner wall of one end of the conveying pipe close to the first alkali washing tower through a spring. Two inclined panels are symmetrically and fixedly installed on the top of the cambered ring. A scraper ring is fixedly installed on the top of the inclined panel. A flipping device for disturbing the filler is arranged above the scraper ring, and a balancing device for promoting uniform contact between the exhaust gas and the filler is arranged inside the flipping device. A liquid collecting arc plate is fixedly installed on the bottom of the scraper ring.

[0007] According to the above technical solution, the left side of the bag-type dust collector passes through and is connected to the kiln smoke collecting main pipe, an induced draft fan is arranged at the lower right side of the bag-type dust collector through a pipeline, a conveying pipe is arranged at the right end of the induced draft fan, a non-self-locking reciprocating spiral groove is arranged on the outer wall of the vertical rod, the outer wall of the arc surface ring is slidably installed on the inner wall of the first alkali washing tower, the arc surface at the right end of the semicircular perforated shell is located on the motion trajectory of the arc surface ring, the inner part of the liquid collecting arc plate passes through the outer wall of the inclined plate, and the tail gas after the metal arsenic processing is transported to the inside of the bag-type dust collector through the kiln smoke collecting main pipe, and the metal arsenic in the tail gas from the kiln smoke collecting main pipe is precipitated by the bag-type dust collector. Arsenic particles are removed, and metal arsenic particles in the exhaust gas are removed with the help of bag dust collector; then the exhaust fan draws the exhaust gas inside the bag dust collector through the pipeline, and then uses the conveying pipe to transport the exhaust gas to the first alkali washing tower to remove the particles escaping from the flue gas, and then the exhaust gas is added to the second alkali washing tower to enter the dust removal and demisting, so that the metal arsenic particles in the flue gas are completely removed to meet the environmental emission standards. At the same time, the first alkali washing tower and the second alkali washing tower are both equipped with external sewage pumps, and then the qualified exhaust gas is discharged through the flue gas straight exhaust pipe; before the exhaust gas enters the first alkali washing tower, the electric rotating rod is started, and the electric rotating rod moves along the first When the bottom of the inner wall of the alkali washing tower rotates, it drives the inclined plate to rotate. The inclined plate performs an orbital disturbance on the washing liquid accumulated at the bottom of the first alkali washing tower, which is convenient for the particles to be mixed in the liquid, and the liquid and particles to be discharged synchronously with the help of the sewage pump, so as to prevent the particles from accumulating in the first alkali washing tower and affecting the subsequent exhaust gas treatment effect. At the same time, when the vertical rod rotates, the reciprocating spiral groove drives the spirally connected sliding ring to slide upward along its own outer wall and reset. The sliding ring drives the cross bar to move synchronously. When the cross bar drives the arc surface ring to slide upward along the inner wall of the first alkali washing tower, it contacts the arc surface of the semicircular perforated shell to generate a resistance force. The semicircular perforated shell passes through The resistance force slides along the inner wall of the conveying pipe away from the first alkali washing tower. When the arc ring is reset, the semicircular perforated shell is reset by the spring force; and the arc ring moves upward and drives the inclined plate to move synchronously when it is reset. The inclined plate drives the scraper ring to scrape synchronously along the inner wall of the first alkali washing tower. The scraper ring scrapes the inner wall of the first alkali washing tower, i.e., the inner wall of the exhaust gas rising path, to reduce the adhesion of pollutants and particulate matter in the exhaust gas. At the same time, the scraper ring drives the liquid collecting arc plate to move synchronously. The liquid collecting arc plate guides the washing liquid falling from the inside of the first alkali washing tower in the center through its own smooth inner inclined surface and the dynamic process of reciprocating up and down movement.

[0008] According to the above technical scheme, the flipping device includes two L-shaped plates, and the two L-shaped plates are symmetrically and fixedly installed on one side of the scraper ring close to the vertical rod. A stuffing box is arranged on the upper part of the interior of the first alkali washing tower, and the stuffing box is elastically retractable. The bottom edge of the stuffing box is located on the movement trajectory of the top of the L-shaped plate. A filter plate is fixedly installed on the top of the telescopic end of the stuffing box, and the outer wall of the filter plate is fixedly connected to the inner wall of the first alkali washing tower. The scraper ring reciprocates upward and drives the L-shaped plate to move synchronously during the resetting process. The L-shaped plate will resist the bottom of the stuffing box during the upward movement, and the telescopic end of the stuffing box is limited by the filter plate. At this time, the bottom of the fixed end shrinks upward due to the resistance force. When the L-shaped plate is reset, the fixed end of the stuffing box is reset by the spring elastic force. The reciprocating stuffing box will drive the synchronous movement of its internal stuffing for the exhaust gas.

[0009] According to the above technical solution, a plurality of resistance plates are fixedly installed at the bottom of the filter plate, and the resistance plates are evenly distributed at the bottom of the filter plate. A sliding plate is slidably installed at the bottom of the inner wall of the fixed end of the stuffing box. A plurality of round rods are equidistantly and rotatably installed on the inner wall of the stuffing box. A plurality of interfering movable plates are equidistantly and fixedly installed on the outer wall of one end of the round rod away from the sliding plate.

[0010] According to the above technical solution, a transverse spring is arranged between the bottom of the sliding plate and the stuffing box, the top of the sliding plate is in contact with the inclined surface of the resistance plate, and a plurality of the round rods are provided with non-self-locking spiral grooves near one end of the sliding plate, and one end of the spiral groove of the round rod passes through the interior of the sliding plate. At the same time, when the fixed end of the stuffing box moves upward, the sliding plate is driven to move synchronously. During the upward movement of the sliding plate, the sliding plate is resisted and guided by the inclined surface of the resistance plate. At this time, the sliding plate slides along the bottom of the inner wall of the stuffing box away from the resistance plate. When the stuffing box is reset, the sliding plate is reset by the spring force, and during the sliding process of the sliding plate along the spiral groove of the outer wall of the round rod, the sliding plate will drive the spirally connected round rod to generate a rotational force and start to rotate. When the round rod rotates, it drives the disturbance plate to revolve. At this time, the disturbance plate performs an orbital disturbance on the stuffing at the edge of the stuffing box.

[0011] The balancing device comprises two U-shaped frames, which are symmetrically and slidably mounted on the bottom of the inner wall of the stuffing box, and the top of the U-shaped frame passes through and is fixedly mounted on the bottom of the sliding plate. The two U-shaped frames are hinged with movable plates at one end away from the sliding plate through a torsion spring, and a torsion spring is arranged between the movable plate and the U-shaped frame, and the movable plate is hinged with an impact block at one end away from the U-shaped frame, and the arc surface of the impact block contacts the inner wall of the fixed end of the stuffing box. During the horizontal sliding and resetting of the sliding plate, the U-shaped frame is driven to move synchronously, and when the U-shaped frame slides toward the edge of the stuffing box, the movable plate is driven to move synchronously. With the movement of the movable plate, the hinge shaft of the movable plate and the impact block connected to itself begins to rotate, and at this time, the impact block moves away from the inner wall of the stuffing box. When the stuffing box is quickly reset from the stored force and tight posture through elastic force, the movable plate is suddenly reset with the help of the rapid reset of the U-shaped frame and the elastic force of the torsion spring, and the impact block is pushed to hit the inner wall of the stuffing box to generate vibration.

[0012] According to the above technical solution, a number of friction wheels are symmetrically and rotatably installed inside the U-shaped frame, a reciprocating screw is fixedly installed on the side of the friction wheel close to the round rod, a circular frame is penetrated and slidably installed on the outer wall of the reciprocating screw, the circular frame is slidably connected to the inner wall of the U-shaped frame close to the sliding plate, and a number of angle plates are equidistantly and fixedly installed inside the circular frame.

[0013] According to the above technical solution, the outer wall of the friction wheel contacts the bottom of the inner wall of the fixed end of the stuffing box, and the bottoms of several of the angle plates contact the bottom of the inner wall of the fixed end of the stuffing box. During the sliding process, the U-shaped frame drives the friction wheel to move synchronously along the bottom of the inner wall of the stuffing box and generates friction. The friction wheel rotates inside the U-shaped frame by relying on the friction force and drives the reciprocating screw to rotate. When the reciprocating screw rotates, the non-self-locking reciprocating spiral groove drives the circular frame to slide reciprocatingly horizontally along the inner wall of the U-shaped frame. At the same time, the circular frame drives the angle plate to move synchronously, and the bottom of the inner wall of the stuffing box is shoveled during the reciprocating horizontal sliding of the angle plate.

[0014] A method for using a kiln tail gas treatment device for metal arsenic processing comprises the following steps: S1: The tail gas after metal arsenic processing is transported to the inside of the bag filter through the kiln smoke collecting main pipe, and the metal arsenic particles in the tail gas from the kiln smoke collecting main pipe are removed by the bag filter; S2: The exhaust fan then draws the exhaust gas from the bag filter through the pipeline, and then uses the conveying pipe to transport the exhaust gas to the first alkali washing tower to remove the particulate matter escaping from the flue gas. The exhaust gas is then added to the second alkali washing tower to enter the dust removal and demisting tower, so that the metal arsenic particulate matter in the flue gas is completely removed to meet the environmental emission standards. At the same time, the first alkali washing tower and the second alkali washing tower are both equipped with external sewage pumps, and then the exhaust gas that meets the standards is discharged through the flue gas direct discharge pipe; S3: Before the tail gas enters the first alkali washing tower, the electric rotating rod is started. When the electric rotating rod rotates along the bottom of the inner wall of the first alkali washing tower, it drives the inclined plate to rotate. The inclined plate performs an orbital disturbance on the washing liquid accumulated below the first alkali washing tower, so that the particles are mixed in the liquid, and the liquid and the particles are discharged synchronously with the help of the sewage pump. At the same time, when the vertical rod rotates, the reciprocating spiral groove drives the spirally connected sliding ring to slide upward along its own outer wall and reset. The sliding ring drives the cross bar to move synchronously. When the cross bar drives the arc surface ring to slide upward along the inner wall of the first alkali washing tower, it contacts the arc surface of the semicircular perforated shell to generate a resistance force. The semicircular perforated shell slides along the inner wall of the conveying pipe away from the first alkali washing tower through the resistance force. When the arc surface ring is reset, the semicircular perforated shell is reset by the elastic force of the spring; S4: The arc ring moves upward and resets, driving the inclined plate to move synchronously. The inclined plate drives the scraper ring to scrape synchronously along the inner wall of the first alkali washing tower. The scraper ring scrapes the inner wall of the first alkali washing tower, i.e., the inner wall of the exhaust gas rising path, back and forth to reduce the adhesion of pollutants and particulate matter in the exhaust gas. At the same time, the scraper ring drives the liquid collecting arc plate to move synchronously. The liquid collecting arc plate guides the washing liquid falling from the inside of the first alkali washing tower in the center through its own smooth inner inclined surface and the dynamic process of reciprocating up and down movement.

[0015] The present invention provides a kiln tail gas treatment device and method for metal arsenic processing, which has the following beneficial effects: (1) The present invention cooperates with a bag filter, a first alkali washing tower, a second alkali washing tower, an electric rotating rod, an inclined plate, a vertical rod, a sliding ring, a horizontal rod, a curved ring, a semicircular perforated shell, an inclined plate, a scraper ring and a liquid collecting curved plate. The slurry after the circulation absorption of the first alkali washing tower and the second alkali washing tower is sent to the metal arsenic wastewater comprehensive treatment system for deep treatment, so that the metal arsenic emission can be ≤0.003mg / 3Nm, meeting the ultra-low emission standard value of metal arsenic kiln flue gas. At the same time, the bag filter sequentially adds the tail gas to the two-stage alkali washing tower for deep treatment, thereby achieving energy saving and consumption reduction; At the same time, the semicircular perforated shell disturbs the tail gas inside the conveying pipe to speed up the circulation, and uses its own arc surface to guide and protect the tail gas flowing inside the first alkali washing tower, preventing the tail gas from flowing back during the circulation process, thereby reducing the treatment rate of the tail gas; The scraper ring can ensure the cleanliness of the inner wall of the first alkali washing tower to a certain extent, prevent the adhesion and residue of pollutants from affecting the purification quality of the tower body on the exhaust gas, and avoid the exhaust gas emission standards not meeting the standards. At the same time, the liquid collecting arc plate is prevented from accumulating residual liquid on its surface during movement, and the liquid is ensured to fall in the center to facilitate the stirring of the inclined plate, so that the particles are discharged in time with the liquid.

[0016] (2) The present invention, through the arrangement of a flipping device, cooperates with a scraper ring, an L-shaped plate, a stuffing box, a filter plate, a resistance plate, a sliding plate, a round rod and a disturbance plate, so as to promote the reciprocating movement of the stuffing inside the stuffing box, rather than contacting the exhaust gas in a static posture, so that the exhaust gas entering the stuffing box can more fully contact the stuffing for pollutant separation and treatment, thereby further improving the treatment quality of the exhaust gas; at the same time, relying on the orbital movement of the disturbance plate and the guiding effect of the sliding plate during the movement, the stuffing inside the stuffing box is prompted to flip more finely during the movement, so that the stuffing as a whole participates in the exhaust gas purification process, avoiding uneven use and loss of the stuffing as a whole, thereby causing uneven purification of part of the circulating exhaust gas, and avoiding shortening the replacement cycle of the stuffing and increasing cost expenditure.

[0017] (3) The present invention, through the setting of the balancing device, cooperates with the sliding plate, U-shaped frame, movable plate, impact block, friction wheel, reciprocating screw, circular frame and angle plate, and relies on the push of the U-shaped frame to further enhance the turning effect of the filler. At the same time, it relies on the vibration force to reduce the possibility of the filter holes of the filter plate being blocked by particulate matter, thereby ensuring the smoothness of the filter holes of the filter plate and thus ensuring the circulation speed of the exhaust gas in the first alkali washing tower, and further reducing the particulate matter content in the exhaust gas; at the same time, relying on the inclined shoveling and drainage of the angle plate, it is effectively prevented that the filler is eroded by the washing liquid and the exhaust gas and adheres to the bottom of the inner wall of the filler box. At the same time, the angle plate moves and guides the filler, so that the filler distribution inside the filler box is relatively balanced, that is, the uniformly distributed filler can achieve a relatively constant separation treatment of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the present invention as a whole; Figure 2 It is a schematic cross-sectional view of the main structure of the present invention; Figure 3 This is a schematic diagram of the peripheral structure of the electric rotating rod of the present invention; Figure 4 It is a schematic diagram of the peripheral structure of the electric rotating rod of the present invention from the right side perspective; Figure 5 It is a schematic diagram of the flipping device of the present invention; Figure 6 It is a schematic diagram of the flipping device of the present invention from the right side perspective; Figure 7 It is a schematic diagram of the equalizing device of the present invention; Figure 8 It is a schematic diagram showing the overall structure of the balancing device of the present invention.

[0019] In the figure: 1. bag filter; 2. kiln smoke collecting main pipe; 3. induced draft fan; 4. conveying pipe; 5. first alkali washing tower; 6. second alkali washing tower; 7. flue gas straight exhaust pipe; 8. electric rotating rod; 9. inclined plate; 10. vertical rod; 11. sliding ring; 12. horizontal rod; 13. arc surface ring; 14. semicircular perforated shell; 15. inclined plate; 16. scraper ring; 17. liquid collecting arc plate; 18. turning device; 181. L-shaped plate; 182. stuffing box; 183. filter plate; 184. contact plate; 185. sliding plate; 186. round rod; 187. disturbance plate; 19. balancing device; 191. U-shaped frame; 192. movable plate; 193. impact block; 194. friction wheel; 195. reciprocating screw rod; 196. circular frame; 197. angle plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] See also Figure 1-Figure 8 One embodiment of the present invention is: a kiln tail gas treatment device for metal arsenic processing, including a bag dust collector 1, a first alkali washing tower 5 is arranged at the right end of a conveying pipe 4, a second alkali washing tower 6 is connected to the top of the first alkali washing tower 5 through a pipeline, a flue gas straight exhaust pipe 7 is arranged on the top of the second alkali washing tower 6, an electric rotating rod 8 is rotatably installed at the bottom of the inner wall of the first alkali washing tower 5, a plurality of inclined plates 9 are equidistantly and fixedly installed on the outer wall of the electric rotating rod 8, a vertical rod 10 is fixedly installed on the top of the electric rotating rod 8, a sliding ring 11 is movably installed on the outer wall of the reciprocating spiral groove of the vertical rod 10, and the sliding ring 11 is penetrated and movably installed on the outer wall of the reciprocating spiral groove of the vertical rod 10, and the sliding ring 11 is A number of cross bars 12 are equidistantly and fixedly installed on the outer wall, a cambered ring 13 is fixedly installed on one end of the cross bar 12 away from the sliding ring 11, a semicircular perforated shell 14 is slidably installed on the inner wall of one end of the conveying pipe 4 close to the first alkali washing tower 5 through a spring, two inclined panels 15 are symmetrically and fixedly installed on the top of the cambered ring 13, a scraper ring 16 is fixedly installed on the top of the inclined panel 15, a flipping device 18 for disturbing the filler is arranged above the scraper ring 16, a balancing device 19 for promoting uniform contact between the exhaust gas and the filler is arranged inside the flipping device 18, and a liquid collecting arc plate 17 is fixedly installed at the bottom of the scraper ring 16.

[0022] The left side of the bag filter 1 passes through and is connected with the kiln smoke collecting main pipe 2. An induced draft fan 3 is arranged at the lower right side of the bag filter 1 through a pipeline. A conveying pipe 4 is arranged at the right end of the induced draft fan 3. A non-self-locking reciprocating spiral groove is arranged on the outer wall of the vertical rod 10. The outer wall of the arc ring 13 is slidably installed on the inner wall of the first alkali washing tower 5. The arc surface of the right end of the semicircular perforated shell 14 is located on the movement trajectory of the arc ring 13. The inner wall of the liquid collecting arc plate 17 passes through the outer wall of the inclined plate 15. Through the above cooperation, the slurry after the circulation absorption by the first alkali washing tower 5 and the second alkali washing tower 6 is sent to the metal arsenic wastewater comprehensive treatment system for deep treatment, which can make the metal arsenic emission ≤0.003mg / Nm3, meeting the ultra-low emission standard value of the metal arsenic kiln flue gas. At the same time, the bag filter 1 sequentially removes the tail The gas is added to the two-stage alkali washing tower for deep treatment to achieve energy saving and consumption reduction; through the above cooperation, the semicircular perforated shell 14 is used to disturb the exhaust gas inside the conveying pipe 4 to speed up the circulation speed, and at the same time, the exhaust gas circulating in the first alkali washing tower 5 is guided and protected by its own arc surface to prevent the exhaust gas from flowing back during the circulation process, thereby reducing the treatment rate of the exhaust gas; through the above cooperation, the scraper ring 16 is used to ensure the cleanliness of the inner wall of the first alkali washing tower 5 to a certain extent, and the pollutants are prevented from adhering to and remaining to affect the purification quality of the tower body for the exhaust gas, so as to avoid the exhaust gas emission standards not meeting the standards. At the same time, the liquid collecting arc plate 17 is prevented from accumulating residual liquid on its own surface during the movement, and the liquid is ensured to fall in the center to facilitate the stirring of the inclined plate 9, so that the particulate matter is discharged in time with the liquid.

[0023] When in use, the tail gas after metal arsenic processing is transported to the inside of the bag filter 1 through the kiln smoke collecting main pipe 2, and the metal arsenic particles in the tail gas from the kiln smoke collecting main pipe 2 are removed by the bag filter 1. The metal arsenic particles in the tail gas are removed by the bag filter 1; then the exhaust fan 3 receives the tail gas inside the bag filter 1 through the pipeline, and then the tail gas is transported to the first alkali washing tower 5 by means of the conveying pipe 4 to remove the particles escaping from the flue gas, and then the tail gas is added to the second alkali washing tower 6 to enter the dust removal and mist removal, so that the metal arsenic particles in the flue gas are completely removed to meet the environmental protection emission standards. At the same time, the first alkali washing tower 5 and the second alkali washing tower 6 are both equipped with sewage pumps, and then the qualified tail gas is discharged through the flue gas straight discharge pipe 7. Through the above cooperation, the slurry after the circulation absorption by the first alkali washing tower 5 and the second alkali washing tower 6 is sent to the metal arsenic sewage comprehensive treatment system for deep treatment, which can make the metal arsenic emission ≤0.003mg / Nm3, which meets the ultra-low emission standard value of metal arsenic kiln flue gas. At the same time, the bag dust collector 1 sequentially adds the exhaust gas to the two-stage alkali washing tower for deep treatment to achieve energy saving and consumption reduction; before the exhaust gas enters the first alkali washing tower 5, the electric rotating rod 8 is started, and the electric rotating rod 8 rotates along the bottom of the inner wall of the first alkali washing tower 5 to drive the inclined plate 9 to rotate. The inclined plate 9 performs a revolution disturbance on the washing liquid accumulated at the bottom of the first alkali washing tower 5, which is convenient for the particles to be mixed in the liquid, and the liquid and particles to be discharged synchronously with the help of the sewage pump, so as to prevent the accumulation of particles in the first alkali washing tower 5 and affect The subsequent exhaust gas treatment effect, at the same time, when the vertical rod 10 rotates, the reciprocating spiral groove drives the spirally connected sliding ring 11 to slide reciprocatingly upward along its own outer wall and reset, and the sliding ring 11 drives the cross bar 12 to move synchronously, and the cross bar 12 drives the arc surface ring 13 to slide upward along the inner wall of the first alkali washing tower 5 and contacts the arc surface of the semicircular perforated shell 14 to generate a resistance force. The semicircular perforated shell 14 slides along the inner wall of the conveying pipe 4 away from the first alkali washing tower 5 through the resistance force. When the arc surface ring 13 is reset, the semicircular perforated shell 14 is reset by the spring elastic force. Through the above cooperation, relying on the semicircular perforated shell 1 4 disturbs the exhaust gas inside the conveying pipe 4 to speed up the circulation speed, and uses its own arc surface to guide and protect the exhaust gas circulating inside the first alkali washing tower 5, so as to prevent the exhaust gas from flowing back during the circulation process, thereby reducing the exhaust gas treatment rate; and the arc ring 13 moves upward and drives the inclined plate 15 to move synchronously when it is reset, and the inclined plate 15 drives the scraper ring 16 to scrape synchronously along the inner wall of the first alkali washing tower 5, and the scraper ring 16 scrapes the inner wall of the first alkali washing tower 5, that is, the inner wall of the exhaust gas rising path, to reduce the adhesion of pollutants and particulate matter in the exhaust gas, and at the same time, the scraper ring 16 drives The liquid collecting arc plate 17 moves synchronously. The liquid collecting arc plate 17 guides the washing liquid falling from the first alkali washing tower 5 in the center through its own smooth inner inclined surface and the dynamic process of reciprocating up and down movement. Through the above cooperation, the scraper ring 16 is relied on to ensure the cleanliness of the inner wall of the first alkali washing tower 5 to a certain extent, prevent the attachment and residue of pollutants from affecting the purification quality of the tower body for the tail gas, and avoid the tail gas emission standard not meeting the standard. At the same time, the liquid collecting arc plate 17 prevents residual liquid from accumulating on its own surface during the movement, and ensures that the liquid falls in the center to facilitate the stirring of the inclined plate 9, so that the particles are discharged in time with the liquid.

[0024] See also Figure 1-Figure 8 , based on the above embodiment, another embodiment of the present invention further includes a flipping device 18; The flipping device 18 includes two L-shaped plates 181, which are symmetrically and fixedly installed on the side of the scraper ring 16 close to the vertical rod 10. A stuffing box 182 is arranged on the top of the first alkali washing tower 5. The stuffing box 182 is elastically retractable. The bottom edge of the stuffing box 182 is located on the top movement trajectory of the L-shaped plate 181. A filter plate 183 is fixedly installed on the top of the telescopic end of the stuffing box 182. The outer wall of the filter plate 183 is fixedly connected to the inner wall of the first alkali washing tower 5. Through the above cooperation, the stuffing inside the stuffing box 182 is prompted to reciprocate instead of contacting the exhaust gas in a static posture, so that the exhaust gas entering the stuffing box 182 can more fully contact the stuffing for pollutant separation and treatment, thereby further improving the treatment quality of the exhaust gas.

[0025] A plurality of abutment plates 184 are fixedly mounted at the bottom of the filter plate 183, and the plurality of abutment plates 184 are equidistantly distributed at the bottom of the filter plate 183. A sliding plate 185 is slidably mounted at the bottom of the inner wall of the fixed end of the stuffing box 182. A plurality of round rods 186 are equidistantly and rotatably mounted on the inner wall of the stuffing box 182. A plurality of interfering interference plates 187 are equidistantly and fixedly mounted on the outer wall of one end of the round rod 186 away from the sliding plate 185.

[0026] A transverse spring is arranged between the bottom of the sliding plate 185 and the stuffing box 182, the top of the sliding plate 185 is in contact with the inclined surface of the resistance plate 184, and a plurality of round rods 186 are provided with non-self-locking spiral grooves at one end close to the sliding plate 185, and one end of the spiral groove of the round rod 186 passes through the interior of the sliding plate 185. Through the above coordination, relying on the revolution of the disturbance plate 187 and the guiding effect of the sliding plate 185 during the movement, the stuffing inside the stuffing box 182 is prompted to turn over more finely during the movement, so that the stuffing as a whole participates in the exhaust gas purification process, avoiding uneven use and loss of the overall stuffing, thereby causing uneven purification of part of the circulating exhaust gas, and avoiding shortening the replacement cycle of the stuffing and increasing cost expenditure.

[0027] When in use, the scraper ring 16 reciprocates upward and drives the L-shaped plate 181 to move synchronously during the reset process. During the upward movement of the L-shaped plate 181, it will resist the bottom of the stuffing box 182. The telescopic end of the stuffing box 182 is limited by the filter plate 183. At this time, the bottom of the fixed end contracts upward through the resistance force. When the L-shaped plate 181 is reset, the fixed end of the stuffing box 182 is reset by the spring force. The stuffing box 182 reciprocates in this way and drives the stuffing inside itself for the exhaust gas to move synchronously. Through the above cooperation, the stuffing inside the stuffing box 182 is prompted to reciprocate, rather than contacting the exhaust gas in a static posture, so that the exhaust gas entering the stuffing box 182 can more fully contact the stuffing for pollutant separation and treatment, thereby further improving the treatment quality of the exhaust gas; at the same time, when the fixed end of the stuffing box 182 moves upward, it drives the sliding plate 185 to move synchronously. During the upward movement of the sliding plate 185, it is resisted by the inclined surface of the resistance plate 184. The sliding plate 185 is in contact with and guides the bottom of the inner wall of the stuffing box 182, and at this time, it slides along the bottom of the inner wall of the stuffing box 182 in the direction away from the contact plate 184. When the stuffing box 182 is reset, the sliding plate 185 is reset by the spring force. During the sliding process of the sliding plate 185 along the spiral groove on the outer wall of the round rod 186, the sliding plate 185 will drive the spirally connected round rod 186 to generate a rotational force and start to rotate. When the round rod 186 rotates, it drives the disturbance plate 187 to revolve. At this time, the disturbance plate 187 revolves and disturbs the stuffing at the edge of the stuffing box 182. Through the above coordination, relying on the revolution of the disturbance plate 187 and the guiding effect of the movement of the sliding plate 185, the stuffing inside the stuffing box 182 is prompted to be turned over more finely during the movement, so that the stuffing as a whole participates in the purification process of the exhaust gas, avoiding uneven use and loss of the overall stuffing, thereby causing uneven purification of part of the circulating exhaust gas, and avoiding shortening the replacement cycle of the stuffing and increasing cost expenditure.

[0028] See also Figure 1-Figure 8 , based on the above embodiment, another embodiment of the present invention further includes an equalizing device 19; The balancing device 19 includes two U-shaped frames 191, which are symmetrically and slidably installed on the bottom of the inner wall of the stuffing box 182, and the top of the U-shaped frame 191 passes through and is fixedly installed on the bottom of the sliding plate 185. The two U-shaped frames 191 are hinged with a movable plate 192 at one end away from the sliding plate 185 through a torsion spring, and a torsion spring is arranged between the movable plate 192 and the U-shaped frame 191. The movable plate 192 is hinged with an impact block 193 at one end away from the U-shaped frame 191, and the arc surface of the impact block 193 contacts the inner wall of the fixed end of the stuffing box 182. Through the above cooperation, the flipping effect of the packing is further improved by relying on the push of the U-shaped frame 191, and at the same time, the possibility of the filter holes of the filter plate 183 being blocked by particulate matter is reduced by relying on the vibration force, thereby ensuring the smoothness of the filter holes of the filter plate 183, thereby ensuring the circulation speed of the exhaust gas in the first alkali washing tower 5, and further reducing the particulate matter content in the exhaust gas.

[0029] A plurality of friction wheels 194 are symmetrically and rotatably installed inside the U-shaped frame 191, a reciprocating screw 195 is fixedly installed on the side of the friction wheel 194 close to the round rod 186, a circular frame 196 is penetrated through the outer wall of the reciprocating screw 195 and slidably installed, the circular frame 196 is slidably connected to the inner wall of the U-shaped frame 191 on the side close to the sliding plate 185, and a plurality of angle plates 197 are equidistantly and fixedly installed inside the circular frame 196.

[0030] The outer wall of the friction wheel 194 contacts the bottom of the inner wall of the fixed end of the stuffing box 182, and the bottoms of several angular plates 197 contact the bottom of the inner wall of the fixed end of the stuffing box 182. Through the above cooperation and relying on the inclined shoveling and guidance of the angular plates 197, the stuffing can be effectively prevented from adhering to the bottom of the inner wall of the stuffing box 182 due to the erosion of the washing liquid and the exhaust gas. At the same time, the angular plates 197 move and guide the stuffing, so that the distribution of the stuffing inside the stuffing box 182 is relatively balanced, that is, the evenly distributed stuffing can achieve a relatively constant separation treatment of the exhaust gas.

[0031] When in use, the sliding plate 185 slides horizontally and resets, driving the U-shaped frame 191 to move synchronously. When the U-shaped frame 191 slides toward the edge of the stuffing box 182, it drives the movable plate 192 to move synchronously. With the movement of the movable plate 192, the hinge shaft of the movable plate 192 and the impact block 193 connected to it begin to rotate. At this time, the impact block 193 moves away from the inner wall of the stuffing box 182. When the stuffing box 182 is quickly reset from the stored force and tightened posture by elastic force, the movable plate 192 is reset suddenly with the help of the rapid reset of the U-shaped frame 191 and the elastic force of the torsion spring, and pushes the impact block 193 to hit the inner wall of the stuffing box 182 to generate vibration. Through the above cooperation, the flipping effect of the packing is further improved by relying on the push of the U-shaped frame 191. At the same time, the possibility of the filter holes of the filter plate 183 being blocked by particulate matter is reduced by relying on the vibration force, thereby ensuring the smoothness of the filter holes of the filter plate 183, thereby ensuring the circulation flow rate of the exhaust gas in the first alkali washing tower 5. degree, and further reduce the particulate matter content in the exhaust gas; during the sliding process, the U-shaped frame 191 drives the friction wheel 194 to move synchronously along the bottom of the inner wall of the stuffing box 182 and generate friction. The friction wheel 194 rotates inside the U-shaped frame 191 by relying on the friction force and drives the reciprocating screw 195 to rotate. When the reciprocating screw 195 rotates, the circular frame 196 is driven by the non-self-locking reciprocating spiral groove to slide reciprocatingly horizontally along the inner wall of the U-shaped frame 191. At the same time, the circular frame 196 drives the angle plate 197 to move synchronously. During the reciprocating horizontal sliding of the angle plate 197, the bottom of the inner wall of the stuffing box 182 is shoveled. Through the above cooperation, the inclined shoveling and dredging of the angle plate 197 can effectively prevent the filler from being eroded by the washing liquid and the exhaust gas and adhering to the bottom of the inner wall of the stuffing box 182. At the same time, the angle plate 197 moves and guides the filler, so that the filler distribution inside the stuffing box 182 is relatively balanced, that is, the uniformly distributed filler can achieve a relatively constant separation treatment of the exhaust gas.

[0032] A method for using a kiln tail gas treatment device for metal arsenic processing comprises the following steps: S1: The tail gas after metal arsenic processing is transported to the inside of the bag filter 1 through the kiln smoke collecting main pipe 2, and the metal arsenic particles in the tail gas from the kiln smoke collecting main pipe 2 are removed by the bag filter 1. The metal arsenic particles in the tail gas are removed by the bag filter 1; S2: Afterwards, the exhaust fan 3 receives the exhaust gas inside the bag filter 1 through the pipeline, and then transports the exhaust gas to the first alkali washing tower 5 through the conveying pipe 4 to remove the particulate matter escaping from the flue gas, and then the exhaust gas is added to the second alkali washing tower 6 to enter the dust removal and demisting, so that the metal arsenic particulate matter in the flue gas is completely removed to meet the environmental emission standards. At the same time, the first alkali washing tower 5 and the second alkali washing tower 6 are both equipped with external sewage pumps, and then the exhaust gas that meets the standards is discharged through the flue gas direct discharge pipe 7; S3: Before the tail gas enters the first alkali washing tower 5, the electric rotating rod 8 is started. When the electric rotating rod 8 rotates along the bottom of the inner wall of the first alkali washing tower 5, it drives the inclined plate 9 to rotate. The inclined plate 9 performs an orbital disturbance on the washing liquid accumulated below the first alkali washing tower 5, so as to facilitate the mixing of particulate matter in the liquid and the synchronous discharge of the liquid and particulate matter with the help of a sewage pump. At the same time, when the vertical rod 10 rotates, the spirally connected sliding ring 11 is driven by the reciprocating spiral groove to slide upward along its own outer wall and reset. The sliding ring 11 drives the cross bar 12 to move synchronously. When the cross bar 12 drives the arc surface ring 13 to slide upward along the inner wall of the first alkali washing tower 5, it contacts the arc surface of the semicircular perforated shell 14 to generate a resistance force. The semicircular perforated shell 14 slides along the inner wall of the conveying pipe 4 away from the first alkali washing tower 5 by the resistance force. When the arc surface ring 13 is reset, the semicircular perforated shell 14 is reset by the spring elastic force; S4: The arc ring 13 moves upward and resets, driving the inclined plate 15 to move synchronously. The inclined plate 15 drives the scraper ring 16 to scrape synchronously along the inner wall of the first alkali washing tower 5. The scraper ring 16 scrapes the inner wall of the first alkali washing tower 5, i.e., the inner wall of the exhaust gas rising path, back and forth to reduce the adhesion of pollutants and particulate matter in the exhaust gas. At the same time, the scraper ring 16 drives the liquid collecting arc plate 17 to move synchronously. The liquid collecting arc plate 17 guides the washing liquid falling from the inside of the first alkali washing tower 5 in the center through its own smooth inner inclined surface and the dynamic process of reciprocating up and down movement.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A kiln tail gas treatment device for metal arsenic processing, comprising a bag filter (1), characterized in that: The left side of the bag filter (1) passes through and is connected to a kiln smoke collecting main pipe (2); an induced draft fan (3) is arranged at the lower right side of the bag filter (1) through a pipeline; a conveying pipe (4) is arranged at the right end of the induced draft fan (3); a first alkali washing tower (5) is arranged at the right end of the conveying pipe (4); the top of the first alkali washing tower (5) is connected to a second alkali washing tower (6) through a pipeline; a flue gas straight exhaust pipe (7) is arranged at the top of the second alkali washing tower (6); an electric rotating rod (8) is rotatably installed at the bottom of the inner wall of the first alkali washing tower (5); a plurality of inclined plates (9) are equidistantly and fixedly installed on the outer wall of the electric rotating rod (8); a vertical rod (10) is fixedly installed on the top of the electric rotating rod (8); the vertical rod (10) passes through and is movably installed on the outer wall of the reciprocating spiral groove A sliding ring (11) is provided, and a plurality of cross bars (12) are fixedly installed at equal intervals on the outer wall of the sliding ring (11); a curved ring (13) is fixedly installed on one end of the cross bar (12) away from the sliding ring (11); a semicircular perforated shell (14) is slidably installed on the inner wall of one end of the conveying pipe (4) close to the first alkali washing tower (5) through a spring; two inclined panels (15) are symmetrically and fixedly installed on the top of the curved ring (13); a scraper ring (16) is fixedly installed on the top of the inclined panel (15); a turning device (18) for disturbing the filler is arranged above the scraper ring (16); a balancing device (19) for promoting uniform contact between the tail gas and the filler is arranged inside the turning device (18); and a liquid collecting arc plate (17) is fixedly installed on the bottom of the scraper ring (16).

2. The exhaust gas treatment device for kiln used for metal arsenic processing according to claim 1, characterized in that: The outer wall of the vertical rod (10) is provided with a non-self-locking reciprocating spiral groove, the outer wall of the arc surface ring (13) is slidably mounted on the inner wall of the first alkali washing tower (5), the arc surface at the right end of the semicircular perforated shell (14) is located on the movement trajectory of the arc surface ring (13), and the inside of the liquid collecting arc plate (17) penetrates the outer wall of the inclined plate (15).

3. The exhaust gas treatment device for kiln used for metal arsenic processing according to claim 2, characterized in that: The flipping device (18) comprises two L-shaped plates (181), the two L-shaped plates (181) are symmetrically and fixedly mounted on a side of the scraper ring (16) close to the vertical rod (10), a stuffing box (182) is arranged on the upper part of the first alkali washing tower (5), the stuffing box (182) is elastically telescopic, the bottom edge of the stuffing box (182) is located on the top movement track of the L-shaped plate (181), a filter plate (183) is fixedly mounted on the top of the telescopic end of the stuffing box (182), and the outer wall of the filter plate (183) is fixedly connected to the inner wall of the first alkali washing tower (5).

4. The exhaust gas treatment device for kiln used for metal arsenic processing according to claim 3 is characterized by: A plurality of abutment plates (184) are fixedly mounted on the bottom of the filter plate (183), and the plurality of abutment plates (184) are equidistantly distributed on the bottom of the filter plate (183). A sliding plate (185) is slidably mounted on the bottom of the inner wall of the fixed end of the stuffing box (182). A plurality of round rods (186) are equidistantly and rotatably mounted on the inner wall of the stuffing box (182). A plurality of interfering moving plates (187) are equidistantly and fixedly mounted on the outer wall of one end of the round rod (186) away from the sliding plate (185).

5. The exhaust gas treatment device for kiln used for metal arsenic processing according to claim 4, characterized in that: A transverse spring is arranged between the bottom of the sliding plate (185) and the stuffing box (182), the top of the sliding plate (185) contacts the inclined surface of the contact plate (184), and a plurality of round rods (186) are provided with non-self-locking spiral grooves at one end close to the sliding plate (185), and one end of the spiral groove of the round rod (186) passes through the interior of the sliding plate (185).

6. The exhaust gas treatment device for kiln used for metal arsenic processing according to claim 5, characterized in that: The balancing device (19) comprises two U-shaped frames (191), the two U-shaped frames (191) are symmetrically and slidably mounted on the bottom of the inner wall of the stuffing box (182), the top of the U-shaped frame (191) passes through and is fixedly mounted on the bottom of the sliding plate (185), the two U-shaped frames (191) are hinged with a movable plate (192) at one end away from the sliding plate (185) through a torsion spring, a torsion spring is arranged between the movable plate (192) and the U-shaped frame (191), and the movable plate (192) is hinged with an impact block (193) at one end away from the U-shaped frame (191), and the arc surface of the impact block (193) contacts the inner wall of the fixed end of the stuffing box (182).

7. The exhaust gas treatment device for kiln used for metal arsenic processing according to claim 6, characterized in that: A plurality of friction wheels (194) are symmetrically and rotatably mounted inside the U-shaped frame (191); a reciprocating screw rod (195) is fixedly mounted on the side of the friction wheel (194) close to the round rod (186); a circular frame (196) is penetrated through the outer wall of the reciprocating screw rod (195) and slidably mounted thereon; a side of the circular frame (196) close to the sliding plate (185) is slidably connected to the inner wall of the U-shaped frame (191); and a plurality of angle plates (197) are equidistantly and fixedly mounted inside the circular frame (196).

8. The exhaust gas treatment device for kiln used for metal arsenic processing according to claim 7, characterized in that: The outer wall of the friction wheel (194) contacts the bottom of the inner wall of the fixed end of the stuffing box (182), and the bottoms of the plurality of angled plates (197) contact the bottom of the inner wall of the fixed end of the stuffing box (182).

9. A method for using a kiln tail gas treatment device for metal arsenic processing, using the kiln tail gas treatment device for metal arsenic processing according to claim 8, characterized in that: The following steps are involved: S1: The tail gas after metal arsenic processing is transported to the inside of the bag filter (1) through the kiln smoke collecting main pipe (2), and the metal arsenic particles in the tail gas from the kiln smoke collecting main pipe (2) are removed by the bag filter (1). The metal arsenic particles in the tail gas are removed by the bag filter (1); S2: The exhaust fan (3) then draws the exhaust gas from the bag filter (1) through the pipeline, and then transports the exhaust gas to the first alkali washing tower (5) through the conveying pipe (4) to remove the particulate matter escaping from the flue gas. The exhaust gas is then added to the second alkali washing tower (6) to enter the dust removal and mist removal, so that the metal arsenic particulate matter in the flue gas is completely removed to meet the environmental emission standards. At the same time, the first alkali washing tower (5) and the second alkali washing tower (6) are both externally equipped with sewage pumps, and then the exhaust gas that meets the standards is discharged through the flue gas direct discharge pipe (7); S3: Before the exhaust gas enters the first alkali washing tower (5), the electric rotating rod (8) is started. The electric rotating rod (8) rotates along the bottom of the inner wall of the first alkali washing tower (5), driving the inclined plate (9) to rotate. The inclined plate (9) performs a revolution disturbance on the washing liquid accumulated at the bottom of the first alkali washing tower (5), so that the particles are mixed in the liquid, and the liquid and the particles are discharged synchronously by means of a sewage pump. At the same time, the vertical rod (10) drives the spirally connected sliding ring (11) through the reciprocating spiral groove when rotating. ) slides upward along its own outer wall and resets, the sliding ring (11) drives the cross bar (12) to move synchronously, the cross bar (12) drives the cambered ring (13) to slide upward along the inner wall of the first alkali washing tower (5) and contacts the cambered surface of the semicircular perforated shell (14) to generate a resistance force, the semicircular perforated shell (14) slides along the inner wall of the conveying pipe (4) in a direction away from the first alkali washing tower (5) by the resistance force, and when the cambered ring (13) is reset, the semicircular perforated shell (14) is reset by the elastic force of the spring; S4: The arc surface ring (13) moves upward and resets, driving the inclined plate (15) to move synchronously. The inclined plate (15) drives the scraper ring (16) to scrape synchronously along the inner wall of the first alkali washing tower (5). The scraper ring (16) scrapes the inner wall of the first alkali washing tower (5), i.e., the inner wall of the exhaust gas ascending path, to reduce the adhesion of pollutants and particulate matter in the exhaust gas. At the same time, the scraper ring (16) drives the liquid collecting arc plate (17) to move synchronously. The liquid collecting arc plate (17) guides the washing liquid falling from the inside of the first alkali washing tower (5) in a central manner through its own smooth inner inclined surface and the dynamic process of reciprocating up and down movement.

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