Integrated dry desulfurization tower for metal smelting flue gas

Abstract

The invention relates to an integrated dry desulfurization tower for metal smelting flue gas, and belongs to the technical field of flue gas treatment.The integrated dry desulfurization tower comprises a desulfurization tower, a flue gas inlet pipe is arranged in the desulfurization tower, one side of the flue gas inlet pipe is located outside the desulfurization tower, the other side of the flue gas inlet pipe is located in the desulfurization tower, a fluidized bed is arranged in the flue gas inlet pipe, and a nozzle is arranged at the top of the desulfurization tower; the nozzle is used for spraying an adsorbent onto the fluidized bed; a mounting plate is arranged in the smoke inlet pipe, a plurality of communicating holes are formed in the mounting plate, the mounting plate is located below the fluidized bed, a plurality of reaction box bodies are arranged on the mounting plate, the number of the reaction box bodies is consistent with that of the communicating holes, smoke inlets are formed in the bottoms of the reaction box bodies, and smoke outlets are formed in the tops of the reaction box bodies; opening and closing plates for opening and closing the smoke inlet and the smoke outlet are respectively arranged on the reaction box body; a material box is arranged in the reaction box body, an adsorbent is arranged in the material box, a soot blowing piece is arranged on the material box, and the soot blowing piece is used for driving the adsorbent to diffuse in the reaction box body. The flue gas desulfurization device has the advantage of improving the flue gas desulfurization effect.

Description

Technical Field

[0001] This application relates to the technical field of flue gas treatment, and particularly to an integrated dry desulfurization tower for metal smelting flue gas. Background Art

[0002] During the metal smelting process and the smelting process of some chemical products, a large amount of waste gas is discharged into the atmosphere. These smelting waste gases have complex compositions and are extremely harmful. They not only cause serious pollution to the surrounding environment but also pose a threat to people's physical health. Therefore, effective treatment of smelting waste gas has become a key task for the industrial field to achieve green and sustainable development. Dry desulfurization is a widely used desulfurization technology. Dry desulfurization refers to the use of powdered or granular absorbents, adsorbents, or catalysts to remove sulfur-containing gases in flue gas. The CaCO3 sprayed into the furnace decomposes at high temperature to form CaO, which reacts with SO2 in the flue gas to form calcium sulfate. The above reaction usually takes place in a desulfurization tower.

[0003] Currently, the desulfurization tower usually includes a tower body with a desulfurization cavity; an intake assembly installed on one side of the bottom of the tower body for introducing flue gas; an outlet assembly installed on the side of the bottom of the tower body away from the intake assembly for discharging flue gas; a through-pipe assembly installed in the desulfurization cavity; a desulfurization assembly installed in the through-pipe assembly for desulfurizing the incoming flue gas; the desulfurization assembly includes: a fluidized bed installed on the through-pipe assembly; and a plurality of Venturi nozzles evenly installed on one side of the fluidized bed.

[0004] However, due to the large space inside the desulfurization tower, when powdered or granular absorbents are introduced into the desulfurization tower, there are significant differences in the distribution concentration of the absorbents, resulting in the incoming flue gas not being able to combine well with the absorbents, thus leading to a relatively average desulfurization effect. Summary of the Invention

[0005] To improve the desulfurization effect on flue gas, this application provides an integrated dry desulfurization tower for metal smelting flue gas.

[0006] The integrated dry desulfurization tower for metal smelting flue gas provided by this application adopts the following technical solutions: An integrated dry desulfurization tower for metal smelting flue gas includes a desulfurization tower. An inlet flue pipe is arranged inside the desulfurization tower. One side of the inlet flue pipe is outside the desulfurization tower, and the other side is inside the desulfurization tower. A fluidized bed is arranged inside the inlet flue pipe. A nozzle is arranged at the top of the desulfurization tower, and the nozzle is used to spray the adsorbent onto the fluidized bed; An installation plate is arranged in the smoke inlet pipe. A plurality of communication holes are formed in the installation plate. The installation plate is located below the fluidized bed and is in a horizontal state. A plurality of reaction boxes are arranged on the installation plate. The number of the reaction boxes is the same as that of the communication holes. A smoke inlet is formed at the bottom of the reaction box, and a smoke outlet is formed at the top. Opening and closing plates for opening and closing the smoke inlet and the smoke outlet are respectively arranged on the reaction box. A material box is arranged in the reaction box. An adsorbent is arranged in the material box. A soot blowing member is arranged on the material box. The soot blowing member is used to drive the adsorbent to diffuse in the reaction box.

[0007] Optionally, the reaction box includes a cylindrical barrel and a partition plate arranged in the barrel. The smoke inlet is formed in the partition plate. The bottom of the barrel is open and communicated with the communication hole. The smoke outlet is formed at the top of the barrel. The opening and closing plate is hinged to the partition plate and the top of the barrel. The hinge axis of the opening and closing plate is parallel to the plate surface of the partition plate. The partition plate divides the barrel into an air inlet chamber and a reaction chamber. The material box is arranged on the partition plate and is located in the reaction chamber. The flue gas introduced by the smoke inlet pipe enters the air inlet chamber. When the air pressure in the air inlet chamber increases, the opening and closing plate on the partition plate is pushed open and enters the reaction chamber. A first motor is arranged at the top of the barrel. The opening and closing plate at the top of the barrel is fixedly arranged on the output shaft of the first motor. A starting member is arranged in the reaction chamber. The starting member is used to start the first motor to open the smoke outlet after the flue gas reacts with the adsorbent, so that the flue gas and the adsorbent in the reaction chamber enter the fluidized bed.

[0008] Optionally, the starting member includes a push switch, a telescopic rod and an airbag. The push switch is arranged in the reaction chamber and is located on the inner top wall of the barrel. The push switch is electrically connected to the first motor. The telescopic rod is located directly below the push switch and extends and retracts in the direction towards the push switch. The telescopic rod is initially in a separated state from the push switch. The airbag is arranged in the telescopic rod and is used to drive the telescopic rod to extend and abut against the push switch and to pull the telescopic rod to shorten and separate from the push switch. After the flue gas enters the reaction chamber and reacts with the adsorbent, the air pressure in the reaction chamber decreases, causing the airbag to expand. The expansion of the airbag drives the telescopic rod to move towards the push switch and abut against the push switch. After the push switch is turned on, the first motor is started to drive the opening and closing plate to rotate to open the smoke outlet. When the reaction chamber is opened, the air pressure in the reaction chamber is restored, and the opening and closing plate rotates towards the smoke outlet under the action of gravity to close the smoke outlet.

[0009] Optionally, a contact plate is arranged at the top of the barrel. The contact plate is an arc-shaped plate and abuts against the output shaft of the first motor to apply a load to the output shaft of the first motor, so that after the first motor is powered off, the opening and closing plate gradually rotates towards the smoke outlet to close the smoke outlet.

[0010] Optionally, a boss is provided on the partition plate. A smoke inlet channel communicating with the smoke inlet is provided on the boss. The opening and closing plate is hinged on the boss. The material box is cylindrical with an open top and is inserted on the boss. The soot blowing member includes a plurality of negative pressure blowers provided on the material box. The air inlet end of the negative pressure blower faces the adsorbent, and the air outlet end faces the opening and closing plate. The negative pressure blower sucks the adsorbent to drive the adsorbent to diffuse in the reaction chamber.

[0011] Optionally, a plurality of vertical plates are provided in the material box. The vertical plates are evenly arranged along the circumferential direction of the boss. Two sides of the vertical plate are respectively arranged on the outer wall of the boss and the inner wall of the material box. The bottom wall of the vertical plate is fixedly arranged on the bottom wall of the material box. The partition plate divides the material box into a plurality of placement grooves for placing the adsorbent. The placement grooves place the adsorbent at intervals. The negative pressure blower is used to suck the adsorbent in the placement groove. A plurality of the negative pressure blowers are rotatably arranged on the material box. A driving member is further included for driving the negative pressure blower to rotate above the empty placement groove.

[0012] Optionally, a ring is rotatably arranged on the boss. The mounting frame of the negative pressure blower is fixedly arranged on the ring. The driving member includes a second motor embedded in the boss. The length direction of the output shaft of the second motor is parallel to the length direction of the boss. The driving member further includes a driving wheel arranged on the output shaft of the second motor. The driving wheel abuts against the inner ring of the ring to drive the ring to rotate.

[0013] Optionally, a suction port cover is provided on the top surface of the placement groove for placing the adsorbent. The bottom of the suction port cover is erected on the top surface of the placement groove. The opening at the top of the suction port cover is adapted to the negative pressure blower. After the negative pressure blower runs above the suction port cover, the air suction end of the negative pressure blower faces the opening at the top of the suction port cover.

[0014] Optionally, an air inlet hole is provided on the mounting plate and above the adsorbent. The air inlet hole communicates with adjacent placement grooves. The air inlet hole is obliquely upward.

[0015] Optionally, a filter screen is provided in the placement groove. The filter screen is located above the air inlet hole. The filter screen is used to disperse the agglomerated adsorbent when the negative pressure blower sucks the adsorbent.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: When treating the flue gas generated by metal smelting, the flue gas is introduced into the desulfurization tower through the inlet flue pipe. After the flue gas enters the inlet flue pipe, it flows along the inlet flue pipe to the installation plate and enters the reaction box through the communication hole. At this time, the opening and closing plate of the outlet flue is closed to temporarily retain the flue gas in the reaction box. Subsequently, the adsorbent is acted on by the soot blowing part, so that the adsorbent diffuses in the reaction box. After the adsorbent diffuses, it chemically reacts with the flue gas to carry out desulfurization operation. After the flue gas is desulfurized, the outlet flue opens, and the flue gas flows along the inlet flue pipe to the fluidized bed. The nozzle sprays the adsorbent onto the fluidized bed. At this time, the adsorbent reacts with the flue gas again to carry out secondary desulfurization. The desulfurized flue gas is discharged from the desulfurization tower to complete the desulfurization operation; during the first desulfurization process, due to the desulfurization operation of the flue gas in the reaction box, the volume of the reaction box is small and temporarily sealed, thus improving the reaction effect between the adsorbent and the flue gas and improving the desulfurization effect of the flue gas; After the adsorbent in the reaction box diffuses, the concentration of the adsorbent in the reaction box increases, thereby improving the reaction efficiency and effect between the flue gas and the adsorbent; at the same time, compared with injecting the adsorbent into the desulfurization tower, injecting the adsorbent into the reaction box reduces the input quantity of the adsorbent, reduces the input cost of the adsorbent and improves the treatment effect of the flue gas. Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of an integrated dry desulfurization tower for metal smelting flue gas in an embodiment of the present application; Figure 2 is the sectional view of the desulfurization tower in an integrated dry desulfurization tower for metal smelting flue gas in an embodiment of the present application; Figure 3 is the sectional view of the inlet flue pipe in an integrated dry desulfurization tower for metal smelting flue gas in an embodiment of the present application; Figure 4 is the structural schematic diagram of the installation plate in an integrated dry desulfurization tower for metal smelting flue gas in an embodiment of the present application; Figure 5 is the sectional view of the reaction box in an integrated dry desulfurization tower for metal smelting flue gas in an embodiment of the present application; Figure 6 is the structural schematic diagram of the starting part in an integrated dry desulfurization tower for metal smelting flue gas in an embodiment of the present application; Figure 7 is the sectional view of the convex platform in an integrated dry desulfurization tower for metal smelting flue gas in an embodiment of the present application; Figure 8 is Figure 7 the enlarged schematic view of part A in

[0018] Description of the reference numerals: 1. Desulfurization tower; 2. Inlet flue pipe; 3. Outlet flue pipe; 4. Fluidized bed; 5. Nozzle; 6. Installation plate; 7. Communication hole; 8. Reaction chamber body; 81. Cylinder body; 82. Partition board; 9. Smoke inlet; 10. Opening and closing plate; 11. Material box; 12. Soot blowing component; 121. Negative pressure fan; 122. Ring; 123. Second motor; 124. Driving wheel; 13. Intake chamber; 14. Reaction chamber; 15. First motor; 16. Starting component; 161. Press switch; 162. Telescopic rod; 163. Airbag; 17. Contact plate; 18. Boss; 19. Smoke inlet channel; 20. Vertical plate; 21. Placing groove; 22. Smoke collecting mask; 23. Intake hole; 24. Filter net; 25. Smoke outlet. Specific embodiments

[0019] The following is a further detailed description of the present application in conjunction with the attached Figures 1-8 drawings.

[0020] The embodiment of the present application discloses an integrated dry desulfurization tower for metal smelting flue gas. Referring to Figure 1 and Figure 2 , the integrated dry desulfurization tower for metal smelting flue gas includes a desulfurization tower 1. An inlet pipe 2 is arranged inside the desulfurization tower 1. One side of the inlet pipe 2 is located outside the desulfurization tower 1, and the other side is located inside the desulfurization tower 1. Further, a smoke outlet pipe 3 is provided on the side wall of the desulfurization tower 1. The smoke outlet pipe 3 is communicated with a cyclone dust collector. The smoke outlet pipe 3 is located on one side of the inlet pipe 2. A fluidized bed 4 is arranged inside the inlet pipe 2. A nozzle 5 is arranged at the top of the desulfurization tower 1. The nozzle 5 is used to spray an adsorbent onto the fluidized bed 4; Referring to Figure 3 and Figure 4 , an installation plate 6 is arranged inside the inlet pipe 2. A plurality of communication holes 7 are opened on the installation plate 6. The communication holes 7 penetrate through the installation plate 6. The installation plate 6 is located below the fluidized bed 4. The installation plate 6 is in a horizontal state. A plurality of reaction chamber bodies 8 are arranged on the installation plate 6. The number of the reaction chamber bodies 8 is the same as that of the communication holes 7 and is communicated with the communication holes 7; Referring to Figure 5 and Figure 6 , a smoke inlet 9 is opened at the bottom of the reaction chamber body 8, and a smoke outlet 25 is opened at the top. Opening and closing plates 10 for opening and closing the smoke inlet 9 and the smoke outlet 25 are respectively arranged on the reaction chamber body 8. A rubber pad is arranged on the closed plate surface of the opening and closing plate 10 to enhance the closing effect of the opening and closing plate 10; Referring to Figure 5 and Figure 6 , a material box 11 is arranged inside the reaction chamber body 8. An adsorbent is arranged inside the material box 11. The adsorbent includes calcium carbonate or sodium bicarbonate, etc. A soot blowing component 12 is arranged on the material box 11. The soot blowing component 12 is used to drive the adsorbent to diffuse in the reaction chamber body 8.

[0021] When treating the flue gas generated by metal smelting, the flue gas is introduced into the desulfurization tower 1 through the flue gas inlet pipe 2. After the flue gas enters the flue gas inlet pipe 2, it flows along the flue gas inlet pipe 2 to the mounting plate 6 and enters the reaction box body 8 through the communication hole 7. At this time, the opening and closing plate 10 of the smoke outlet 25 is closed to temporarily retain the flue gas in the reaction box body 8. Subsequently, the adsorbent is acted on by the soot blowing member 12 so that the adsorbent diffuses in the reaction box body 8. After the adsorbent diffuses, it chemically reacts with the flue gas to carry out desulfurization operation. After the flue gas is desulfurized, the smoke outlet 25 is opened, and the flue gas flows along the flue gas inlet pipe 2 to the fluidized bed 4. The nozzle 5 sprays the adsorbent onto the fluidized bed 4. At this time, the adsorbent reacts with the flue gas again to carry out secondary desulfurization. The desulfurized flue gas is discharged from the desulfurization tower 1 to complete the desulfurization operation; during the first desulfurization process, due to the desulfurization operation of the flue gas in the reaction box body 8, the volume of the reaction box body 8 is small and temporarily sealed, thereby improving the reaction effect between the adsorbent and the flue gas and improving the desulfurization effect of the flue gas.

[0022] Refer to Figure 6 In the embodiment of the present application, the reaction box body 8 includes a cylindrical barrel body 81 and a partition plate 82 arranged in the barrel body 81. The partition plate 82 is circumferentially and fixedly arranged on the inner wall of the barrel body 81. The flue gas inlet 9 is opened on the partition plate 82. The bottom of the barrel body 81 is open and communicated with the communication hole 7. The smoke outlet 25 is opened at the top of the barrel body 81. The opening and closing plate 10 is hinged between the partition plate 82 and the top of the barrel body 81. The hinge axis of the opening and closing plate 10 is parallel to the plate surface of the partition plate 82; Refer to Figure 6 The partition plate 82 divides the barrel body 81 into an air inlet chamber 13 and a reaction chamber 14. The material box 11 is arranged on the partition plate 82 and is located in the reaction chamber 14; Refer to Figure 6 The flue gas introduced by the flue gas inlet pipe 2 enters the air inlet chamber 13. When the air pressure in the air inlet chamber 13 increases, the opening and closing plate 10 on the partition plate 82 is pushed open and enters the reaction chamber 14. During the process of the flue gas in the air inlet chamber 13 entering the reaction chamber 14, the air pressure in the air inlet chamber 13 drops, and the opening and closing plate 10 on the partition plate 82 rotates under the action of gravity to close the flue gas inlet 9 to close the flue gas inlet 9, and the next batch of air inlet into the air inlet chamber 13 is carried out; Refer to Figure 6 Furthermore, a first motor 15 is arranged at the top of the barrel body 81. The opening and closing plate 10 at the top of the barrel body 81 is fixedly arranged on the output shaft of the first motor 15. The first motor 15 drives the opening and closing plate 10 to move out of or into the smoke outlet 25; Refer to Figure 6 A starting member 16 is arranged in the reaction chamber 14. After the flue gas reacts with the adsorbent, the starting member 16 is used to start the first motor 15 to open the smoke outlet 25 so that the flue gas and the adsorbent in the reaction chamber 14 enter the fluidized bed 4.

[0023] After the flue gas in the intake chamber 13 enters the reaction chamber 14 through the smoke inlet 9, it undergoes a chemical reaction with the adsorbent in the reaction chamber 14. After the flue gas and the adsorbent have reacted for a period of time, the starting member 16 acts on the first motor 15. The first motor 15 drives the opening and closing plate 10 to rotate to open the smoke outlet 25. After the smoke outlet 25 is opened, the flue gas in the smoke inlet pipe 2 is first injected into the reaction chamber 14, and then it carries the flue gas in the reaction chamber 14. The reaction products are removed from the reaction chamber 14 and flow to the fluidized bed 4, thereby undergoing a secondary desulfurization reaction.

[0024] Referring to Figure 6 , in the embodiment of the present application, the starting member 16 includes a push switch 161, a telescopic rod 162, and an airbag 163. The push switch 161 is arranged in the reaction chamber 14 and on the inner top wall of the cylinder body 81. The push switch 161 is electrically connected to the first motor 15. The working principle of the push switch 161 is that when pressure is applied to the push switch 161, the push switch 161 is turned on, and after the applied pressure is removed, the push switch 161 is turned off; in the embodiment of the present application, the first motor 15 is a motor without a self-locking function. When the first motor 15 is powered off, the output shaft of the first motor 15 is in a free state; Referring to Figure 6 , the telescopic rod 162 is located directly below the push switch 161 and extends and retracts in the direction of the push switch 161. The telescopic rod 162 is initially in a separated state from the push switch 161, and the distance between the end of the telescopic rod 162 and the push switch 161 is less than the expansion distance of the airbag 163. The airbag 163 is arranged inside the telescopic rod 162 and is used to drive the telescopic rod 162 to extend and abut against the push switch 161 and to pull the telescopic rod 162 to shorten and separate from the push switch 161; When the flue gas enters the reaction chamber 14 and reacts with the adsorbent, since both the smoke inlet 9 and the smoke outlet 25 are in a closed state, as the reaction process of the flue gas and the adsorbent progresses, the air pressure in the reaction chamber 14 decreases. After the air pressure decreases, the airbag 163 expands. The airbag 163 expands along the length direction of the telescopic rod 162. The expansion of the airbag 163 drives the telescopic rod 162 to move towards the push switch 161 and abut against the push switch 161. After the push switch 161 is turned on, the first motor 15 is started to drive the opening and closing plate 10 to rotate to open the smoke outlet 25; when the reaction chamber 14 is opened, the air pressure in the reaction chamber 14 is restored, and the opening and closing plate 10 rotates towards the smoke outlet 25 under the action of gravity to close the smoke outlet 25. Subsequently, the flue gas in the intake chamber 13 enters the reaction chamber 14 through the smoke inlet 9 again.

[0025] Referring to Figure 6 and Figure 7, when the telescopic rod 162 abuts against the push switch 161 to start the first motor 15, the opening and closing plate 10 opens the smoke outlet 25. However, after the air pressure in the reaction chamber 14 quickly recovers, the airbag 163 resumes deformation and drives the telescopic rod 162 to resume its length. The telescopic rod 162 disengages from the push switch 161, the first motor 15 is powered off, and the opening and closing plate 10 rotates freely towards the smoke outlet 25 to close the smoke outlet 25. Since the opening and closing plate 10 rotates freely, the opening time of the smoke outlet 25 is short, resulting in the insufficient removal of the flue gas and the flue gas mixture in the reaction chamber 14. Therefore, to extend the opening time of the smoke outlet 25, a contact plate 17 is provided at the top of the cylinder body 81. The contact plate 17 is an arc-shaped plate that abuts against the output shaft of the first motor 15 and applies a load to the output shaft of the first motor 15. After the first motor 15 is powered off, the opening and closing plate 10 gradually rotates towards the smoke outlet 25 to close the smoke outlet 25; under the action of the opening and closing plate 10, it acts on the output shaft of the first motor 15, causing the opening and closing plate 10 to rotate towards the smoke outlet 25 uniformly and relatively slowly to close the smoke outlet 25, so that the flue gas and the flue gas mixture have a longer time to move out of the reaction chamber 14.

[0026] Referring to Figure 5 , Figure 6 and Figure 7 , in the embodiment of the present application, a boss 18 is provided on the partition plate 82. An air inlet channel 19 communicating with the air inlet 9 is opened on the boss 18. The opening and closing plate 10 is hinged on the boss 18. The material box 11 is cylindrical with an open top and is inserted on the boss 18. The soot blowing member 12 includes a plurality of negative pressure blowers 121 provided on the material box 11. The air inlet ends of the negative pressure blowers 121 face the adsorbent, and the air outlet ends face the opening and closing plate 10. The negative pressure blowers 121 suck the adsorbent and drive the adsorbent to diffuse in the reaction chamber 14; when the reaction chamber 14 performs flue gas treatment, the negative pressure blowers 121 are started. The negative pressure blowers 121 suck the adsorbent in the material box 11, causing the adsorbent to pass through the fan blades of the negative pressure blowers 121 and blow towards the upper part of the reaction chamber 14, thereby making the adsorbent disperse in the reaction chamber 14. The operation is simple and convenient; at the same time, when the adsorbent passes through the fan blades, the fan blades hit part of the adsorbent, causing the adsorbent to move towards the side wall of the reaction chamber 14, so that the adsorbent is more evenly distributed in the reaction chamber 14, thereby improving the treatment effect of the adsorbent on the flue gas; after the smoke outlet 25 is opened, the negative pressure blowers 121 blow the flue gas and the flue gas mixture out of the smoke outlet 25, facilitating the reaction chamber 14 to have a space to accommodate the next batch of flue gas.

[0027] Referring to Figure 7, when the adsorbent in the reaction chamber 14 treats the flue gas, the mixture generated by the reaction easily falls into the adsorbent, resulting in a decrease in the adsorption effect of the adsorbent. Therefore, in the embodiment of the present application, a plurality of vertical plates 20 are arranged in the material box 11. The vertical plates 20 are evenly arranged along the circumference of the boss 18. Both sides of the vertical plate 20 are respectively arranged on the outer wall of the boss 18 and the inner wall of the material box 11. The bottom wall of the vertical plate 20 is fixedly arranged on the bottom wall of the material box 11. The partition plate 82 divides the material box 11 into a plurality of placement grooves 21 for placing the adsorbent. The adsorbent is placed in the placement grooves 21 at intervals. The negative pressure fan 121 is used to suck the adsorbent in the placement groove 21; the negative pressure fan 121 is located above the placement groove 21 where the adsorbent is placed. The negative pressure fan 121 sucks the adsorbent and fills the reaction chamber 14 with the adsorbent. When the mixture generated by the reaction of the adsorbent and the flue gas falls, under the action of the negative pressure fan 121, the mixture flows towards the blank placement groove 21 and falls into the blank placement groove 21, thereby reducing the influence of the mixture on the adsorbent.

[0028] Referring to Figure 7 and Figure 8 , after the adsorbent in the reaction chamber 14 is dispersed by the negative pressure fan 121, some of the adsorbent will fall into the blank placement groove 21, resulting in a low utilization rate of the adsorbent. Therefore, to improve the utilization rate of the adsorbent, a plurality of negative pressure fans 121 are rotatably arranged on the material box 11. A driving member is also included for driving the negative pressure fan 121 to rotate above the blank placement groove 21. A ring 122 is rotatably arranged on the boss 18. The mounting frame of the negative pressure fan 121 is fixedly arranged on the ring 122. The driving member includes a second motor 123 embedded in the boss 18. The length direction of the output shaft of the second motor 123 is parallel to the length direction of the boss 18. The driving member also includes a driving wheel 124 arranged on the output shaft of the second motor 123. The driving wheel 124 abuts against the inner ring of the ring 122 to drive the ring 122 to rotate. Since the volume of the reaction chamber 14 is certain, the time for the flue gas to open the closing plate 10 and then close the closing plate 10 again is determined. Therefore, the amount of flue gas entering the reaction chamber 14 is certain. The amount of adsorbent required is matched with the amount of flue gas. When the dispersed adsorbent reaches the design value, the second motor 123 is started. The second motor 123 drives the driving wheel 124 to rotate. The driving wheel 124 rotates to drive the ring 122 to rotate. The ring 122 rotates to drive the negative pressure fan 121 to rotate above the adjacent placement groove 21. The negative pressure fan 121 sucks the mixture and the adsorbent that have fallen into the placement groove 21, so that the adsorbent is dispersed in the reaction chamber 14 again, thereby improving the utilization rate of the adsorbent; at the same time, by driving the negative pressure fan 121 to move in a circular motion in the reaction chamber 14 by the second motor 123, the complexity of the flow trajectories of the flue gas and the adsorbent is increased, which facilitates the contact reaction between the flue gas and the adsorbent, and improves the desulfurization effect of the flue gas.

[0029] Referring to Figure 7, in the embodiment of the present application, a mask collector 22 is provided on the top surface of the placement groove 21 for placing the adsorbent. The bottom of the mask collector 22 is erected on the top surface of the placement groove 21, and the opening at the top of the mask collector 22 is adapted to the negative pressure fan 121. After the negative pressure fan 121 operates above the mask collector 22, the air suction end of the negative pressure fan 121 faces the opening at the top of the mask collector 22. Under the action of the mask collector 22, the opening of the placement groove 21 is blocked, further reducing the possibility of the mixture falling into the adsorbent. At the same time, when the negative pressure fan 121 operates to the top of the mask collector 22, it is convenient to suck the adsorbent in the placement groove 21 to disperse the adsorbent in the reaction chamber 14. Further, an air inlet hole 23 is provided on the mounting plate 6 and above the adsorbent. The air inlet hole 23 communicates with adjacent placement grooves 21, and the air inlet hole 23 is obliquely upward. Under the action of the air inlet hole 23, it is convenient for the gas in the adjacent placement grooves 21 to enter the placement groove 21, facilitating the dispersion of the adsorbent driven by the negative pressure fan 121. The air inlet hole 23 is located above the adsorbent, reducing the possibility of the mixture entering the placement groove 21 through the air inlet hole 23 affecting the adsorbent.

[0030] Refer to Figure 7 , further, a filter screen 24 is provided in the placement groove 21. The filter screen 24 is located above the air inlet hole 23. The filter screen 24 is used to disperse the agglomerated adsorbent when the negative pressure fan 121 sucks the adsorbent. At the same time, under the action of the filter screen 24, the adsorbent below the filter screen 24 passes through the filter screen 24 orderly, facilitating the control of the dispersion amount of the adsorbent, thereby improving the utilization rate of the adsorbent.

[0031] The implementation principle of a metal smelting flue gas integrated dry desulfurization tower in the embodiment of the present application is as follows: When treating the flue gas generated by metal smelting, the flue gas is introduced into the desulfurization tower 1 through the flue gas inlet pipe 2. After the flue gas enters the flue gas inlet pipe 2, it flows along the flue gas inlet pipe 2 to the mounting plate 6 and enters the reaction box body 8 through the communication hole 7. At this time, the closing plate 10 of the smoke outlet 25 is closed to temporarily retain the flue gas in the reaction box body 8. Subsequently, the adsorbent is acted on by the soot blowing member 12 to make the adsorbent diffuse in the reaction box body 8. After the adsorbent diffuses, it chemically reacts with the flue gas for desulfurization operation. After the flue gas is desulfurized, the smoke outlet 25 is opened, and the flue gas flows along the flue gas inlet pipe 2 to the fluidized bed 4. The nozzle 5 sprays the adsorbent onto the fluidized bed 4. At this time, the adsorbent reacts with the flue gas again for secondary desulfurization, and the desulfurized flue gas is discharged from the desulfurization tower 1 to complete the desulfurization operation. During the first desulfurization process, since the flue gas undergoes desulfurization operation in the reaction box body 8, the volume of the reaction box body 8 is small and temporarily sealed, thereby improving the reaction effect between the adsorbent and the flue gas and enhancing the desulfurization effect of the flue gas.

[0032] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A metal smelting flue gas integrated dry desulfurization tower, characterized in that: The invention comprises a desulfurization tower (1), wherein a smoke inlet pipe (2) is arranged in the desulfurization tower (1), one side of the smoke inlet pipe (2) is located outside the desulfurization tower (1), and the other side is located in the desulfurization tower (1), a sulfidized bed (4) is arranged in the smoke inlet pipe (2), and a nozzle (5) is arranged at the top of the desulfurization tower (1), and the nozzle (5) is used to spray an adsorbent onto the sulfidized bed (4); A mounting plate (6) is arranged in the smoke inlet pipe (2), a plurality of connecting holes (7) are arranged on the mounting plate (6), the mounting plate (6) is located below the fluidized bed (4), the mounting plate (6) is in a horizontal state, a plurality of reaction boxes (8) are arranged on the mounting plate (6), the number of the reaction boxes (8) is the same as the number of the connecting holes (7), a smoke inlet (9) is arranged at the bottom of the reaction box (8), a smoke outlet (25) is arranged at the top, and opening and closing plates (10) for opening and closing the smoke inlet (9) and the smoke outlet (25) are respectively arranged on the reaction box (8); A material box (11) is arranged in the reaction box (8), an adsorbent is arranged in the material box (11), and a soot blowing member (12) is arranged on the material box (11), and the soot blowing member (12) is used to drive the adsorbent to diffuse in the reaction box (8).

2. The metal smelting flue gas integrated dry desulfurization tower according to claim 1, characterized in that: The reaction box (8) comprises a cylindrical body (81) and a partition (82) arranged in the body (81); the smoke inlet (9) is provided on the partition (82); the bottom of the body (81) is open and communicates with the connecting hole (7); the smoke outlet (25) is provided on the top of the body (81); the opening and closing plate (10) is hinged between the partition (82) and the top of the body (81); the hinge axis of the opening and closing plate (10) is parallel to the plate surface of the partition (82); the partition (82) divides the body (81) into an air inlet chamber (13) and a reaction chamber (14); the material box (11) is arranged on the partition (82) and is located in the reaction chamber (14); 4), the smoke introduced through the smoke inlet pipe (2) enters the air inlet chamber (13), and when the air pressure in the air inlet chamber (13) increases, the opening and closing plate (10) on the partition (82) is pushed open and enters the reaction chamber (14); a first motor (15) is arranged on the top of the cylinder (81), and the opening and closing plate (10) on the top of the cylinder (81) is fixedly arranged on the output shaft of the first motor (15); a starting member (16) is arranged in the reaction chamber (14), and the starting member (16) is used to start the first motor (15) and open the smoke outlet (25) after the smoke reacts with the adsorbent, so that the smoke and adsorbent in the reaction chamber (14) enter the fluidized bed (4).

3. The metal smelting flue gas integrated dry desulfurization tower according to claim 2, characterized in that: The starter (16) comprises a push switch (161), a telescopic rod (162) and an air bag (163); the push switch (161) is arranged in the reaction chamber (14) and located on the inner top wall of the cylinder (81); the push switch (161) is electrically connected to the first motor (15); the telescopic rod (162) is located directly below the push switch (161) and telescopes toward the push switch (161); the telescopic rod (162) is initially separated from the push switch (161); the air bag (163) is arranged in the telescopic rod (162) and is used to drive the telescopic rod (162) to extend and abut against the push switch (161) and to pull the telescopic rod (162) to extend and abut against the push switch (161) The rod (162) is shortened and separated from the push switch (161). After the smoke enters the reaction chamber (14) and reacts with the adsorbent, the air pressure in the reaction chamber (14) is reduced, causing the airbag (163) to expand. The expansion of the airbag (163) drives the telescopic rod (162) to move toward the push switch (161) and abut against the push switch (161). After the push switch (161) is turned on, the first motor (15) is started to drive the opening and closing plate (10) to rotate and open the smoke outlet (25); when the reaction chamber (14) is opened, the air pressure in the reaction chamber (14) is restored, and the opening and closing plate (10) rotates toward the smoke outlet (25) under the action of gravity to close the smoke outlet (25).

4. The metal smelting flue gas integrated dry desulfurization tower according to claim 3, characterized in that: The top of the cylinder (81) is provided with an abutment plate (17), which is an arc-shaped plate and abuts against the output shaft of the first motor (15) to apply a load to the output shaft of the first motor (15), so that after the first motor (15) is powered off, the opening and closing plate (10) gradually rotates toward the smoke outlet (25) to close the smoke outlet (25).

5. The metal smelting flue gas integrated dry desulfurization tower according to claim 2, characterized in that: The partition (82) is provided with a boss (18), and the boss (18) is provided with a smoke inlet channel (19) connected to the smoke inlet (9). The opening and closing plate (10) is hinged on the boss (18). The material box (11) is cylindrical and has an open top and is plugged into the boss (18). The sootblower (12) includes a plurality of negative pressure fans (121) arranged on the material box (11). The air inlet end of the negative pressure fan (121) faces the adsorbent, and the air outlet end faces the opening and closing plate (10). The negative pressure fan (121) absorbs the adsorbent and drives the adsorbent to diffuse in the reaction chamber (14).

6. The metal smelting flue gas integrated dry desulfurization tower according to claim 5, characterized in that: A plurality of vertical plates (20) are arranged in the material box (11), and the vertical plates (20) are evenly arranged along the circumference of the boss (18). The two sides of the vertical plates (20) are respectively arranged on the outer wall of the boss (18) and the inner wall of the material box (11). The bottom wall of the vertical plates (20) is fixedly arranged on the bottom wall of the material box (11). The partition (82) divides the material box (11) into a plurality of placement slots (21) for placing adsorbents. The placement slots (21) place adsorbents at intervals. The negative pressure fans (121) are used to absorb the adsorbents in the placement slots (21). The plurality of negative pressure fans (121) are all rotatably arranged on the material box (11), and also include a driving member for driving the negative pressure fans (121) to rotate to above the blank placement slots (21).

7. The metal smelting flue gas integrated dry desulfurization tower according to claim 6, characterized in that: A circular ring (122) is rotatably arranged on the boss (18); a mounting frame of the negative pressure fan (121) is fixedly arranged on the circular ring (122); the driving member comprises a second motor (123) embedded in the boss (18); the length direction of the output shaft of the second motor (123) is parallel to the length direction of the boss (18); the driving member further comprises a driving wheel (124) arranged on the output shaft of the second motor (123); the driving wheel (124) abuts against the inner ring of the circular ring (122) to drive the circular ring (122) to rotate.

8. The metal smelting flue gas integrated dry desulfurization tower according to claim 6, characterized in that: A collecting cover (22) is arranged on the top surface of the placement groove (21) for placing the adsorbent. The bottom of the collecting cover (22) is mounted on the top surface of the placement groove (21). The opening at the top of the collecting cover (22) is adapted to the negative pressure fan (121). After the negative pressure fan (121) runs to the top of the collecting cover (22), the suction end of the negative pressure fan (121) is directly opposite to the top opening of the collecting cover (22).

9. The metal smelting flue gas integrated dry desulfurization tower according to claim 8, characterized in that: An air inlet hole (23) is provided on the mounting plate (6) and located above the adsorbent. The air inlet hole (23) is connected to an adjacent placement groove (21). The air inlet hole (23) is provided obliquely upward.

10. The metal smelting flue gas integrated dry desulfurization tower according to claim 9, characterized in that: A filter screen (24) is arranged in the placement groove (21), and the filter screen (24) is located above the air inlet (23). The filter screen (24) is used to disperse the compacted adsorbent when the negative pressure fan (121) absorbs the adsorbent.

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