Integrated desulfurization and denitrification process for refining tail gas

Abstract

This invention relates to the technical field of tail gas desulfurization and denitrification, and in particular to an integrated process for desulfurization and denitrification of refining and chemical tail gas. The process includes a tower, a waste gas pipe, and a chemical solution pipe. The chemical solution pipe and the waste gas pipe penetrate the outer surface of the tower. A spray frame is installed inside the tower, and an air jet frame is installed below the spray frame. A rotatable processing structure is located inside the tower between the air jet frame and the spray frame. A hollow transfer structure that supplies liquid to the spray frame is installed at the lower end of the tower. A return pipe is installed through the outer surface of the tower, and its lower end communicates with the interior of the transfer structure. This invention increases the reaction time between the waste gas and the reaction liquid by repeatedly inverting the reaction liquid and waste gas during the rotation of the inverting structure. The air jet frame sprays outwards, and the spray frame atomizes the reaction liquid into a spray form, which then contacts the reacted waste gas again, further increasing the degree of reaction between the waste gas and the reaction liquid, reducing the residual pollution in the discharged waste gas, and increasing the degree of reaction of the reaction liquid.

Description

Technical Field

[0001] This invention relates to the technical field of tail gas desulfurization and denitrification, and in particular to an integrated process for desulfurization and denitrification of refining and chemical tail gas. Background Technology

[0002] Based on the dry and wet states of the absorbent and desulfurization products during the desulfurization process, desulfurization technologies can be divided into wet, dry, and semi-dry (semi-wet) methods. Wet FGD technology uses a solution or slurry containing an absorbent to desulfurize and treat desulfurization products in a wet state. This method has the advantages of fast desulfurization reaction speed, simple equipment, and high desulfurization efficiency. In wet desulfurization and denitrification, the waste gas is often absorbed through spraying the reaction liquid.

[0003] Chinese patent CN211358323U discloses an industrial exhaust gas desulfurization and denitrification treatment device. Addressing the problem that existing desulfurization and denitrification devices have poor spraying effect on exhaust gas, failing to uniformly spray the exhaust gas and reducing treatment efficiency, the following solution is proposed: It includes a denitrification tower, with an inlet pipe and an outlet pipe fixedly connected to it. A water pump is fixedly installed on one side of the denitrification tower, and a connecting pipe is fixedly connected to the outlet of the water pump. Three branch pipes are fixedly connected to the connecting pipe, and each of the three branch pipes is fixedly installed inside the denitrification tower. Multiple nozzles are fixedly connected to each of the three branch pipes. Guide plates are fixedly connected to the inner walls on both sides of the denitrification tower, and a movable seat is slidably installed inside the denitrification tower. This utility model has a reasonable structure and is easy to operate. The desulfurization and denitrification treatment device has a good effect on the spraying of tail gas, which can make the tail gas be sprayed evenly and improve the treatment effect. The above-mentioned related technologies have the following defects: In the existing technology, the treatment liquid is generally sprayed and opposed to the exhaust gas, so that the sprayed treatment liquid comes into contact with the exhaust gas and reacts. However, the contact time between the exhaust gas and the treatment liquid is too short, which can easily lead to incomplete desulfurization and denitrification in the discharged exhaust gas, causing environmental pollution. At the same time, the incomplete reaction of the treatment liquid results in the waste of reaction liquid raw materials. Therefore, an integrated desulfurization and denitrification process for refining tail gas is proposed. Summary of the Invention

[0004] To ensure a full reaction between the reaction liquid and the waste gas, this invention provides an integrated process for desulfurization and denitrification of refining tail gas.

[0005] This invention provides an integrated desulfurization and denitrification process for refining tail gas, employing the following technical solution: It includes a tower, a waste gas pipe, and a chemical liquid pipe. The chemical liquid pipe and the waste gas pipe penetrate the outer surface of the tower. A spray frame is installed inside the tower, and an air jet frame is installed below the spray frame. A rotatable processing structure is located inside the tower between the air jet frame and the spray frame. A hollow transfer structure capable of supplying liquid to the spray frame is installed at the lower end of the tower. A return pipe is installed through the outer surface of the tower, and the lower end of the return pipe communicates with the interior of the transfer structure.

[0006] The processing structure includes a ring frame and two end rings. The ring frame is located between the two end rings. A rotatable flipping structure is installed on the inner ring side of the ring frame. The flipping structure has a cavity inside. A transmission structure that can drive the flipping structure to rotate is installed inside the tower. A shaft tube is fixed at both ends of the ring frame. The shaft tube is connected to the flipping structure in a vertical state. The other end of the shaft tube is in sliding contact with the inner wall of the tower. The shaft tube passes through the end face of the adjacent end ring.

[0007] An extraction pipe is installed through the upper surface of the tower, and the other end of the extraction pipe is connected to the jetting frame.

[0008] Optionally, the distance between the extraction pipe, exhaust pipe, return pipe, and liquid medicine pipe and the tower axis is equal to the distance between the shaft pipe and the tower axis. The extraction pipe, return pipe, liquid medicine pipe, and exhaust pipe are distributed at equal distances clockwise around the tower axis. The inner wall of the tower is provided with arc grooves at the connection points of the extraction pipe, return pipe, liquid medicine pipe, and exhaust pipe. The included angle of the arc groove is smaller than the distance between two adjacent ring frames.

[0009] Optionally, the transfer structure includes a transfer column and a turntable. The transfer column is coaxially rotatably inserted into the tower. The upper end of the transfer column rotatably contacts an end plate, which is fixedly inserted into the tower. The lower end of the transfer column contacts the upper surface of the turntable. The transfer column has multiple transfer grooves vertically penetrating through it. A return pipe is inserted from the circumference of the end plate and passes through the bottom surface of the end plate flush with it. A drain pipe is installed through the bottom surface of the turntable. The other end of the drain pipe passes through the axis of the bottom wall of the tower. The end plate has a return groove penetrating vertically. The lower end of the return pipe, the lower end of the return groove, and the upper end of the drain pipe are arranged clockwise around the axis of the transfer column. The axis of the transfer column is located between the multiple transfer grooves in a perforated structure. A power extraction pipe is installed inside the perforated structure of the transfer column. The lower end of the power extraction pipe passes through the bottom surface of the turntable. The end plate is fixedly sleeved on the outer surface of the power extraction pipe. The upper end of the power extraction pipe is connected to the spray frame.

[0010] Optionally, the flipping structure includes a concentric ring and a core cylinder. The concentric ring is coaxially rotatably inserted into the ring frame, and the core cylinder is fixedly inserted into the concentric ring. The axis of the core cylinder intersects perpendicularly with the axis of the concentric ring. A perforated plate is inserted into the center of the core cylinder. Hole-like structures communicating with the interior are opened at both ends of the core cylinder. The shaft tube communicates with the hole-like structures of the core cylinder in a vertical state.

[0011] Optionally, the transmission structure includes a central bevel gear ring, a ring cylinder, and a central cylinder. The ring cylinder is rotatably inserted into the outer surface of the central cylinder. The central bevel gear ring is coaxially located inside the ring cylinder. The central cylinder is fixedly sleeved onto the outer surface of the power extraction pipe and the air extraction pipe. The central bevel gear ring is coaxially installed inside the central cylinder. A short shaft is fixed at the center of the outer surface of the central cylinder. A spur gear is coaxially fixed onto the short shaft. A spur gear is tangentially arranged on one side of the spur gear. A linkage rod is fixed at one end of the spur gear near the ring cylinder. A support is fixed on the end face of the ring frame. The support is slidably sleeved onto the outer surface of the linkage rod. The linkage rod slides through the circumferential side of the ring cylinder. A reciprocating screw is threaded into one end of the linkage rod inside the ring cylinder. A sleeve shaft is slidably sleeved onto one end of the linkage rod inside the ring cylinder. The sleeve shaft is coaxially fixed with the reciprocating screw. The sleeve shaft is rotatably connected to the inner wall of the ring cylinder. A bevel gear is coaxially fixed on the outer surface of the sleeve shaft. The bevel gear meshes with the central bevel gear ring.

[0012] Optionally, the perforated plate is hollow inside, and a plug frame that moves along the short axis is inserted inside the perforated plate. The perforated plate has rows of evenly distributed perforated structures on its upper and lower surfaces. The plug frame is a plate-shaped structure on one side of each row of perforated structures. A sliding shaft is slidably inserted at the short axis, and the sliding shaft is fixed to the plug frame. The plug frame is elastically connected to the inner wall of the perforated plate. A curved plate is provided on the side of the sliding shaft outside the short axis. The middle position of the curved plate is bent away from the sliding shaft. The curved plate is slidably sleeved on the outer surface of the support frame. Multiple evenly distributed elastic baffles are fixed on the upper surface of the curved plate. A connecting rod is fixed on the front of the straight toothed plate. An elastic lever is fixed on the bottom surface of the other end of the connecting rod. A double-headed telescopic rod is fixed on the side of the curved plate away from the sliding shaft. The two ends of the double-headed telescopic rod are fixed to the support frame.

[0013] Optionally, the elastic lever plate and the elastic baffle plate are arranged in parallel, with the lower end of the elastic lever plate located below the upper end of the elastic baffle plate, and the upper and lower surfaces of the blocking frame slidingly contacting the inner walls of the upper and lower sides of the through-hole plate, respectively.

[0014] Optionally, a synchronous gear ring is rotatably inserted inside the tower, and a ring frame is fixedly installed on the inner wall of the synchronous gear ring. A dual-head power box is fixed on the outer surface of the tower. A lower gear is meshed on the outer ring surface of the liquid transfer column, and the lower gear penetrates the inner wall of the tower. The lower gear is connected to one output end of the dual-head power box. An upper gear is meshed on the outer ring surface of the synchronous gear ring, and the upper gear penetrates the inner wall of the tower. The upper gear is fixed to the other output end of the dual-head power box.

[0015] Optionally, the number of teeth on the spur gear plate is equal to half the number of teeth on the spur gear, and the meshing length between the reciprocating lead screw and the linkage rod is greater than the length of the spur gear plate.

[0016] In summary, the present invention has the following beneficial technical effects:

[0017] 1. This invention, by setting up components such as a spray frame, an air jet frame, a return pipe, and a flipping structure, allows waste gas and new reaction liquid to be filled into the flipping structure. As the flipping structure rotates, the reaction liquid and waste gas are repeatedly reversed, increasing the reaction time between the waste gas and the reaction liquid. The absorbed waste gas is then filled into the air jet frame through the extraction pipe, causing the air jet frame to spray outwards. Then, the reacted reaction liquid is filled into the spray frame, causing the spray frame to spray the reaction liquid into a mist, which then comes into contact with the reacted waste gas again, further increasing the degree of reaction between the waste gas and the reaction liquid, reducing the residual pollution in the discharged waste gas, and increasing the degree of reaction of the reaction liquid.

[0018] 2. This invention, by setting up components such as a liquid transfer column, a reflux tank, a drain pipe, and a liquid transfer tank, allows the shaft cylinder to be connected sequentially to the extraction pipe, reflux pipe, liquid medicine pipe, and waste gas pipe as the end ring drives the ring frame to rotate. The extraction pipe extracts the gas after the reaction, and then the reflux pipe fills the liquid transfer tank with the liquid after the reaction. As the end ring continues to rotate, the liquid medicine pipe fills the shaft cylinder with new reaction liquid through the shaft pipe, and then the waste gas pipe fills the shaft cylinder with new waste gas. As the liquid transfer column rotates, it drives the reaction liquid added to the liquid transfer tank through the reflux pipe to connect with the power extraction pipe. The power extraction pipe fills the spray frame with the reaction liquid, and the reaction liquid sprayed by the spray frame flows into the reflux tank. The liquid transfer tank, whose reaction liquid has been drained, connects with the reflux tank as the liquid transfer column rotates. The reaction liquid in the reflux tank enters the liquid transfer tank and then connects with the drain pipe, discharging the reaction liquid after multiple reactions from the drain pipe.

[0019] 3. This invention, by setting up components such as a perforated plate, a blocking frame, a bending plate, an elastic lever plate, and an elastic baffle plate, allows the end ring to drive the ring frame to rotate around the central cylinder, thereby driving the bevel gear to mesh with the central bevel gear ring. The bevel gear drives the reciprocating screw to mesh with the linkage rod, causing the linkage rod to move reciprocally. The straight gear plate and the linkage rod move synchronously with the linkage rod. The straight gear plate, through the elastic lever plate, pushes the elastic baffle plate to drive the bending plate to rotate. Before the straight gear plate meshes with the spur gear, the bending plate drives the blocking frame to seal the perforated structure of the perforated plate through the sliding shaft. Then, after the straight gear plate meshes with the spur gear, it drives the central cylinder to rotate half a revolution. At the same time, during the rotation of the central cylinder, the exhaust gas and the reaction liquid are located on both sides of the perforated plate. After the straight gear plate disengages from the spur gear, the elastic lever plate disengages from the elastic baffle plate. Then, the blocking frame, under the elastic connection with the perforated plate, disengages from sealing the perforated structure, allowing the reaction liquid rotating to the upper side to flow downward through the perforated structure of the perforated plate, while the exhaust gas on the lower side flows upward and contacts the reaction liquid to react. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention;

[0021] Figure 2 This is a top view of the structure in an embodiment of the present invention;

[0022] Figure 3This is a schematic diagram of the internal structure of the tower in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the connection between the annular cylinder and the central cylinder in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection between the concentric ring and the ring frame in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the distribution of arc grooves in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the connection between the sliding shaft and the short shaft in an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the connection between the reciprocating lead screw and the linkage rod in an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the connection between the end plate and the tower in an embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the connection between the drain pipe and the turntable in an embodiment of the present invention.

[0030] Reference numerals: 1. Tower; 2. Exhaust gas pipe; 3. Liquid pipe; 4. Spraying frame; 5. Air spraying frame; 6. Treatment structure; 61. Ring frame; 62. End ring; 63. Tilting structure; 631. Concentric ring; 632. Shaft cylinder; 633. Perforated plate; 6331. Blocking frame; 6332. Sliding shaft; 6333. Bending plate; 6334. Elastic baffle plate; 6335. Elastic lever plate; 6336. Double-headed telescopic rod; 6337. Connecting rod; 64. Transmission structure; 641. Central conical tooth ring; 642. Ring cylinder; 643 644. Center cylinder; 645. Short shaft; 646. Spur gear; 647. Spur gear plate; 648. Support frame; 649. Linkage rod; 640. Reciprocating screw; 6410. Sleeve shaft; 6411. Bevel gear; 65. Shaft tube; 7. Transmission structure; 71. Liquid transmission column; 72. Turntable; 73. End plate; 74. Liquid transmission tank; 75. Drain pipe; 76. Return tank; 77. Power extraction pipe; 8. Return pipe; 9. Air extraction pipe; 10. Arc groove; 11. Synchronous gear ring; 12. Double-headed power box; 13. Lower gear; 14. Upper gear. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-10 The present invention will be described in further detail below.

[0032] This invention discloses an integrated desulfurization and denitrification process for refining and chemical tail gas. For example... Figures 1-10As shown, the structure includes a tower 1, an exhaust gas pipe 2, and a liquid medicine pipe 3. The upper end of the tower 1 can discharge the purified gas. The liquid medicine pipe 3 is connected to a drug supply device, which fills the liquid medicine pipe 3 with liquid medicine. The exhaust gas pipe 2 is connected to a device that generates exhaust gas. The liquid medicine pipe 3 and the exhaust gas pipe 2 penetrate the outer surface of the tower 1. A spray frame 4 is installed inside the tower 1. The bottom surface of the spray frame 4 can spray water mist downwards. An air jet frame 5 is installed below the spray frame 4. The upper surface of the air jet frame 5 is permeable, which allows the internal gas to be discharged.

[0033] A rotatable processing structure 6 is located inside the tower 1 between the jetting frame 5 and the liquid spraying frame 4. A hollow transfer structure 7 is installed at the lower end of the tower 1 to supply liquid to the liquid spraying frame 4. A reflux pipe 8 is installed through the outer surface of the tower 1. A water pump is installed on the part of the reflux pipe 8 outside the tower 1 to assist in driving the flow of the reaction liquid. The lower end of the reflux pipe 8 is connected to the interior of the transfer structure 7. The hollow transfer structure 7 can store the reaction liquid.

[0034] The transfer structure 7 includes a transfer column 71 and a turntable 72. The transfer column 71 is coaxially rotatably inserted into the inside of the tower 1. The upper end of the transfer column 71 is rotatably in contact with an end plate 73. The end plate 73 and the turntable 72 are fixedly inserted into the inside of the tower 1. The lower end of the transfer column 71 is in contact with the upper surface of the turntable 72. The transfer column 71 has multiple transfer grooves 74 vertically penetrating through it. The return pipe 8 is inserted from the circumference of the end plate 73 and passes through the bottom surface of the end plate 73 flush with it. A drain pipe 75 is installed through the bottom surface of the turntable 72. The other end of the drain pipe 75 passes through the axis of the bottom wall inside the tower 1. The drain pipe 75 can discharge the reaction liquid in the connected transfer grooves 74.

[0035] The end plate 73 has a reflux trough 76 that runs vertically through it. After the reaction liquid sprayed by the spray rack 4 flows into the reflux trough 76, the reaction liquid in the reflux trough 76 flows into the liquid transfer trough 74 connected to it. The lower end of the reflux pipe 8, the lower end of the reflux trough 76, and the upper end of the drain pipe 75 are arranged clockwise around the axis of the liquid transfer column 71. The axis of the liquid transfer column 71 is located between multiple liquid transfer troughs 74 and has a perforated structure. A power extraction pipe 77 is provided inside the perforated structure of the liquid transfer column 71. A water pump is installed on the outside of the tower 1 on the power extraction pipe 77, which can pump the reaction liquid upward. The lower end of the power extraction pipe 77 passes through the bottom surface of the turntable 72. The end plate 73 is fixedly sleeved on the outer surface of the power extraction pipe 77. The upper end of the power extraction pipe 77 is connected to the spray rack 4. The power extraction pipe 77 can fill the spray rack 4 with the reaction liquid in the liquid transfer trough 74 connected to it.

[0036] The processing structure 6 includes a ring frame 61 and two end rings 62. The ring frame 61 is located between the two end rings 62. A rotatable overturning structure 63 is installed on the inner ring side of the ring frame 61. The overturning structure 63 has a cavity inside, where waste gas and reaction liquid can be stored. When the overturning structure 63 rotates, it can drive the waste gas and reaction liquid inside to overturn. The waste gas has an upward flow tendency, and the reaction liquid has a downward flow tendency. The flowing waste gas and reaction liquid gradually increase the degree of reaction through continuous collision. A transmission structure 64 that can drive the overturning structure 63 to rotate is installed inside the tower 1.

[0037] The flipping structure 63 includes a concentric ring 631 and a core cylinder 632. The concentric ring 631 is coaxially rotatably inserted into the ring frame 61, and the core cylinder 632 is fixedly inserted into the concentric ring 631. The axis of the core cylinder 632 intersects perpendicularly with the axis of the concentric ring 631. A perforated plate 633 is inserted at the center of the core cylinder 632, which can divide the interior of the core cylinder 632 into two spaces. Both ends of the core cylinder 632 have perforated structures that communicate with the interior. The shaft tube 65 communicates with the perforated structures of the core cylinder 632 in the vertical state. Both ends of the ring frame 61 are fixed with shaft tubes 65, which communicate with the flipping structure 63 in the vertical state. The other end of the shaft tube 65 slides in contact with the inner wall of the tower 1. The shaft tube 65 passes through the end face of the adjacent end ring 62. When the shaft tube 65 is connected to the reflux pipe 8, the reflux pipe 8 can draw the reaction liquid in the core cylinder 632 into the connected liquid transfer tank 74.

[0038] A synchronous gear ring 11 is rotatably inserted inside the tower 1. A ring frame 61 is fixedly installed on the inner wall of the synchronous gear ring 11. A double-headed power box 12 is fixed on the outer surface of the tower 1. A lower gear 13 is meshed on the outer ring surface of the liquid transfer column 71. The lower gear 13 penetrates the inner wall of the tower 1 and is connected to one output end of the double-headed power box 12. An upper gear 14 is meshed on the outer ring surface of the synchronous gear ring 11. The upper gear 14 penetrates the inner wall of the tower 1 and is fixed to the other output end of the double-headed power box 12. The upper gear 14 and the lower gear 13 are connected to the output end of the double-headed power box 12 through a coupling. The double-headed power box 12 drives the liquid transfer column 71 and the synchronous gear ring 11 to rotate at the same angle through the upper gear 14 and the lower gear 13.

[0039] The transmission structure 64 includes a central bevel gear ring 641, a ring cylinder 642, and a central cylinder 643. The ring cylinder 642 is rotatably inserted into the outer surface of the central cylinder 643. The central bevel gear ring 641 is coaxially located inside the ring cylinder 642. The central cylinder 643 is fixedly sleeved on the outer surface of the power extraction pipe 77 and the air extraction pipe 9. The central bevel gear ring 641 is coaxially installed inside the central cylinder 643. A short shaft 644 is fixed at the center of the outer surface of the shaft cylinder 632. The short shaft 644 is coaxial with the concentric ring 631. A spur gear 645 is coaxially fixed on the short shaft 644. A spur gear plate 646 is tangentially arranged on one side of the spur gear 645. The spur gear plate 646 can mesh with the spur gear 645 during movement. A linkage rod 648 is fixed at one end of the spur gear plate 646 near the ring cylinder 642.

[0040] The perforated plate 633 is hollow inside, and a blocking frame 6331 that moves along the short axis 644 is inserted inside the perforated plate 633. The blocking frame 6331 moves along the short axis 644. The perforated plate 633 has rows of evenly distributed perforated structures on its upper and lower surfaces. The blocking frame 6331 is a plate-like structure on one side of each row of perforated structures. The plate-like structure of the blocking frame 6331 can block the corresponding row of perforated structures of the perforated plate 633. A sliding shaft 6332 is slidably inserted at the short axis 644. The sliding shaft 6332 is fixed to the blocking frame 6331. The blocking frame 6331 is elastically connected to the inner wall of the perforated plate 633. The elastic connection can be made of elastic materials such as springs, elastic telescopic rods, and elastic elements. The elastic connection between the blocking frame 6331 and the perforated plate 633 has a tendency to cause the perforated structures of the blocking frame 6331 and the perforated plate 633 to be misaligned.

[0041] A support frame 647 is fixed to the end face of the ring frame 61. The support frame 647 is slidably sleeved on the outer surface of the linkage rod 648. The linkage rod 648 slides through the circumferential side of the ring cylinder 642. A reciprocating screw 649 is threaded into one end of the linkage rod 648 inside the ring cylinder 642. A sleeve shaft 6410 is slidably sleeved into the other end of the linkage rod 648 inside the ring cylinder 642. The sleeve shaft 6410 is coaxially fixed with the reciprocating screw 649. When the reciprocating screw 649 rotates, it drives the straight tooth plate 646 to move back and forth by meshing with the linkage rod 648.

[0042] The number of teeth on the spur gear 646 is equal to half the number of teeth on the spur gear 645. During one meshing of the spur gear 646 and the spur gear 645, the shaft cylinder 632 can rotate half a revolution. The meshing length of the reciprocating screw 649 and the linkage rod 648 is greater than the length of the spur gear 646. During the rotation of the reciprocating screw 649 and its meshing with the linkage rod 648, the linkage rod 648 moves back and forth, which in turn drives the spur gear 646 to move back and forth and mesh with the spur gear 645 and then disengage.

[0043] The sleeve shaft 6410 is rotatably connected to the inner wall of the ring cylinder 642. A bevel gear 6411 is coaxially fixed on the outer surface of the sleeve shaft 6410. The bevel gear 6411 meshes with the central bevel gear ring 641. When the bevel gear 6411 rotates around the axis of the ring cylinder 642, it drives the reciprocating screw 649 and the sleeve shaft 6410 to rotate around the axis of the bevel gear 6411 by meshing with the central bevel gear ring 641.

[0044] A curved plate 6333 is provided on one side of the sliding shaft 6332 outside the short shaft 644. The middle position of the curved plate 6333 bends away from the sliding shaft 6332. The curved plate 6333 is slidably sleeved on the outer surface of the support frame 647. Multiple evenly distributed elastic baffles 6334 are fixed on the upper surface of the curved plate 6333. A connecting rod 6337 is fixed on the front of the straight tooth plate 646. An elastic lever 6335 is fixed on the bottom surface of the other end of the connecting rod 6337. The elastic lever 6335 is arranged parallel to the elastic baffles 6334. The lower end of the elastic lever 6335 is located below the upper end of the elastic baffles 6334. The blocking frame 6331 is on... The lower part of the curved plate 633 slides in contact with the inner walls of the upper and lower sides of the perforated plate 633. A double-headed telescopic rod 6336 is fixed to the side of the curved plate 6333 away from the sliding shaft 6332. Both ends of the double-headed telescopic rod 6336 are fixed to the support frame 647. During the movement of the curved plate 6333, both ends of the double-headed telescopic rod 6336 extend and retract synchronously. When the double-headed telescopic rod 6336 reaches its maximum extension and retraction, the curved plate 6333 stops moving. At this time, the curved part of the curved plate 6333 is misaligned with the sliding shaft 6332. The double-headed telescopic rod 6336 can drive the curved part of the curved plate 6333 to coincide with the sliding shaft 6332. When the sliding shaft 6332 is located on the curved plate 6333, the curved plate 6333 stops moving. When the bending section of plate 6333 is bent, the plate-like structure of the blocking frame 6331 is misaligned with the hole-like structure of the through plate 633. When the bent section of the bending plate 6333 is misaligned with the sliding shaft 6332, the bending plate 6333 pushes the plate-like structure of the blocking frame 6331 to block the hole-like structure of the through plate 633 through the sliding shaft 6332. As the linkage rod 648 drives the spur gear 646 to reciprocate, before the spur gear 646 meshes with the spur gear 645 each time, it first pushes the elastic stop plate 6334 through the elastic lever plate 6335 to cause the bent section of the bending plate 6333 to misalign with the sliding shaft 6332. 5. After disengagement, as the spur tooth plate 646 continues to move, the elastic lever plate 6335, through relative elastic bending and misalignment with the elastic baffle plate 6334, causes the shaft cylinder 632 to rotate. During this rotation, the blocking frame 6331 seals the perforated structure of the through-hole plate 633. After the shaft cylinder 632 rotates half a revolution each time, the blocking frame 6331 disengages from sealing the through-hole plate 633. Then, the reaction liquid rotating to the upper side of the through-hole plate 633 flows downward through the perforated structure of the through-hole plate 633, while the exhaust gas on the lower side of the through-hole plate 633 flows upward through the perforated structure of the through-hole plate 633. The exhaust gas and the reaction liquid react and absorb harmful gases in the exhaust gas during the flow.

[0045] A suction pipe 9 is installed through the upper surface of the tower 1. The other end of the suction pipe 9 is connected to the jetting frame 5. The distance between the suction pipe 9, the waste gas pipe 2, the return pipe 8, and the liquid medicine pipe 3 and the axis of the tower 1 is equal to the distance between the shaft pipe 65 and the axis of the tower 1. The suction pipe 9, the return pipe 8, the liquid medicine pipe 3, and the waste gas pipe 2 are distributed at equal intervals clockwise around the axis of the tower 1. As the end ring 62 drives the ring frame 61 to rotate, the shaft cylinder 632 is connected to the suction pipe 9, the return pipe 8, the liquid medicine pipe 3, and the waste gas pipe 2 in sequence. The suction pipe 9 extracts the gas after the reaction, and then the return pipe 8 fills the liquid transfer tank 74 after the reaction. As the end ring 62 continues to rotate... The liquid pipe 3 fills the shaft cylinder 632 with new reaction liquid through the shaft pipe 65, and then the exhaust pipe 2 fills the shaft cylinder 632 with new exhaust gas. As the liquid transfer column 71 rotates, it drives the reaction liquid added to the liquid transfer tank 74 through the return pipe 8 to connect with the power suction pipe 77. The power suction pipe 77 fills the reaction liquid into the spray frame 4. The reaction liquid sprayed by the spray frame 4 flows into the return tank 76. The liquid transfer tank 74, which has been drained of reaction liquid, connects with the return tank 76 as the liquid transfer column 71 rotates. After the reaction liquid in the return tank 76 enters the liquid transfer tank 74, it connects with the drain pipe 75, and the reaction liquid after multiple reactions is discharged from the drain pipe 75.

[0046] The inner wall of the tower 1 is provided with arc grooves 10 at the connection points of the exhaust pipe 9, return pipe 8, liquid medicine pipe 3 and waste gas pipe 2. The included angle of the arc groove 10 is smaller than the distance between two adjacent ring frames 61. The arc groove 10 increases the time for the shaft pipe 65 to connect with the exhaust pipe 9, return pipe 8, liquid medicine pipe 3 and waste gas pipe 2.

[0047] The working principle is as follows: The drug supply equipment fills the drug liquid pipe 3 with the reaction liquid. The exhaust gas pipe 2 is connected to the equipment that generates exhaust gas. The drug liquid pipe 3 and the exhaust gas pipe 2 are filled with exhaust gas and reaction liquid through the shaft pipe 65 into the connected flipping structure 63. As the flipping structure 63 flips continuously, the exhaust gas and reaction liquid mix upside down. The reaction liquid tends to flow downward and the exhaust gas tends to flow upward. The reaction liquid and exhaust gas are mixed in the flow. The absorbed exhaust gas is filled into the jet frame 5 by the exhaust pipe 9, which makes the jet frame 5 spray outward. The sprayed exhaust gas flows upward in the tower 1. Then the reaction liquid after reaction is filled into the spray frame 4, which makes the spray frame 4 spray the reaction liquid into a spray shape and flow downward again to contact the reaction liquid after reaction, further increasing the degree of reaction between the exhaust gas and the reaction liquid.

[0048] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An integrated desulfurization and denitrification process for refining tail gas, comprising a tower (1), a waste gas pipe (2), and a chemical liquid pipe (3), wherein the chemical liquid pipe (3) and the waste gas pipe (2) penetrate the outer surface of the tower (1), characterized in that: The tower (1) is equipped with a spray rack (4) inside, and a jet rack (5) is provided below the spray rack (4). A rotatable processing structure (6) is provided inside the tower (1) between the jet rack (5) and the spray rack (4). A hollow transfer structure (7) is installed at the lower end of the tower (1) to supply liquid to the spray rack (4). A return pipe (8) is installed through the outer surface of the tower (1). The lower end of the return pipe (8) is connected to the interior of the transfer structure (7). The processing structure (6) includes a ring frame (61) and two end rings (62). The ring frame (61) is located between the two end rings (62). A rotatable flipping structure (63) is connected and installed on the inner ring side of the ring frame (61). The flipping structure (63) has a cavity inside. A transmission structure (64) that can drive the flipping structure (63) to rotate is installed inside the tower (1). A shaft tube (65) is fixed at both ends of the ring frame (61). The shaft tube (65) is connected to the flipping structure (63) in a vertical state. The other end of the shaft tube (65) is in sliding contact with the inner wall of the tower (1). The shaft tube (65) passes through the end face of the adjacent end ring (62). An exhaust pipe (9) is installed through the upper surface of the tower (1), and the other end of the exhaust pipe (9) is connected to the jet frame (5). The flipping structure (63) includes a concentric ring (631) and a core cylinder (632). The concentric ring (631) is coaxially rotatably inserted into the ring frame (61), and the core cylinder (632) is fixedly inserted into the concentric ring (631). The axis of the core cylinder (632) intersects perpendicularly with the axis of the concentric ring (631). A perforated plate (633) is inserted into the center of the core cylinder (632). Hole-like structures communicating with the interior are opened at both ends of the core cylinder (632). The shaft tube (65) communicates with the hole-like structures of the core cylinder (632) in the vertical state. The transmission structure (64) includes a central bevel gear ring (641), a ring cylinder (642), and a central cylinder (643). The ring cylinder (642) is rotatably inserted into the outer surface of the central cylinder (643). The central bevel gear ring (641) is coaxially located inside the ring cylinder (642). The central cylinder (643) is fixedly sleeved on the outer surface of the power extraction pipe (77) and the air extraction pipe (9). The central bevel gear ring (641) is coaxially installed inside the central cylinder (643). A short shaft (644) is fixed at the center of the outer surface of the shaft cylinder (632). A spur gear (645) is coaxially fixed on the short shaft (644). A spur gear plate (646) is tangentially arranged on one side of the spur gear (645). A linkage is fixed at one end of the spur gear plate (646) near the ring cylinder (642). A support frame (647) is fixed to the end face of the rod (648) and the ring frame (61). The support frame (647) is slidably sleeved on the outer surface of the linkage rod (648). The linkage rod (648) slides through the circumferential side of the ring cylinder (642). A reciprocating screw (649) is threaded into one end of the linkage rod (648) inside the ring cylinder (642). A sleeve shaft (6410) is slidably sleeved at one end of the linkage rod (648) inside the ring cylinder (642). The sleeve shaft (6410) is coaxially fixed with the reciprocating screw (649). The sleeve shaft (6410) is rotatably connected to the inner wall of the ring cylinder (642). A bevel gear (6411) is coaxially fixed on the outer surface of the sleeve shaft (6410). The bevel gear (6411) meshes with the central bevel gear ring (641).

2. The integrated desulfurization and denitrification process for refining tail gas according to claim 1, characterized in that: The distance between the extraction pipe (9), the waste gas pipe (2), the return pipe (8) and the liquid medicine pipe (3) and the axis of the tower (1) is equal to the distance between the shaft pipe (65) and the axis of the tower (1). The extraction pipe (9), the return pipe (8), the liquid medicine pipe (3) and the waste gas pipe (2) are distributed at equal distances clockwise around the axis of the tower (1). The inner wall of the tower (1) is provided with arc grooves (10) at the connection points of the extraction pipe (9), the return pipe (8), the liquid medicine pipe (3) and the waste gas pipe (2). The included angle of the arc groove (10) is smaller than the distance between two adjacent ring frames (61).

3. The integrated desulfurization and denitrification process for refining tail gas according to claim 1, characterized in that: The transfer structure (7) includes a transfer column (71) and a turntable (72). The transfer column (71) is coaxially rotatably inserted into the tower (1). The upper end of the transfer column (71) rotatably contacts an end plate (73). The end plate (73) and the turntable (72) are fixedly inserted into the tower (1). The lower end of the transfer column (71) contacts the upper surface of the turntable (72). The transfer column (71) has multiple transfer grooves (74) vertically penetrating it. The return pipe (8) is inserted from the circumference of the end plate (73) and passes flush with the bottom surface of the end plate (73). A drain pipe (75) is installed through the bottom surface of the turntable (72). The drain pipe (75) is also... One end of the end plate (73) is through the bottom wall axis of the tower (1), and the end plate (73) is provided with a reflux groove (76) that runs through the top and bottom. The lower end of the reflux pipe (8), the lower end of the reflux groove (76) and the upper end of the drain pipe (75) are arranged clockwise with the axis of the liquid transfer column (71). The axis of the liquid transfer column (71) is located between multiple liquid transfer grooves (74) and has a hole structure. A power extraction pipe (77) is provided inside the hole structure of the liquid transfer column (71). The lower end of the power extraction pipe (77) passes through the bottom surface of the turntable (72). The end plate (73) is fixedly sleeved on the outer surface of the power extraction pipe (77). The upper end of the power extraction pipe (77) is connected to the spray frame (4).

4. The integrated desulfurization and denitrification process for refining tail gas according to claim 3, characterized in that: The perforated plate (633) is hollow inside, and a plug (6331) that moves along the short axis (644) is inserted inside the perforated plate (633). The perforated plate (633) has rows of evenly distributed perforated structures on its upper and lower surfaces. The plug (6331) is a plate-shaped structure on one side of each row of perforated structures. A sliding shaft (6332) is slidably inserted at the short axis (644). The sliding shaft (6332) is fixed to the plug (6331). The plug (6331) is elastically connected to the inner wall of the perforated plate (633). A curved plate (6332) is provided on the outer side of the sliding shaft (644). 333), the middle position of the bending plate (6333) bends away from the sliding shaft (6332), the bending plate (6333) slides on the outer surface of the support frame (647), multiple evenly distributed elastic baffles (6334) are fixed on the upper surface of the bending plate (6333), the front of the straight tooth plate (646) is fixed with a connecting rod (6337), the bottom surface of the other end of the connecting rod (6337) is fixed with an elastic lever (6335), the side of the bending plate (6333) away from the sliding shaft (6332) is fixed with a double-headed telescopic rod (6336), and both ends of the double-headed telescopic rod (6336) are fixed to the support frame (647).

5. The integrated desulfurization and denitrification process for refining tail gas according to claim 4, characterized in that: The elastic lever (6335) and the elastic stop plate (6334) are arranged in parallel. The lower end of the elastic lever (6335) is located below the upper end of the elastic stop plate (6334). The upper and lower surfaces of the block frame (6331) are in sliding contact with the inner walls of the upper and lower sides of the through plate (633), respectively.

6. The integrated desulfurization and denitrification process for refining tail gas according to claim 3, characterized in that: The tower (1) is rotatably inserted with a synchronous gear ring (11), and the ring frame (61) is fixedly installed on the inner wall of the synchronous gear ring (11). A double-headed power box (12) is fixed on the outer surface of the tower (1). A lower gear (13) is meshed on the outer ring surface of the liquid transfer column (71). The lower gear (13) penetrates the inner wall of the tower (1) and is connected to one output end of the double-headed power box (12). An upper gear (14) is meshed on the outer ring surface of the synchronous gear ring (11). The upper gear (14) penetrates the inner wall of the tower (1) and is fixed to the other output end of the double-headed power box (12).

7. The integrated desulfurization and denitrification process for refining tail gas according to claim 3, characterized in that: The number of teeth of the spur gear (646) is equal to half the number of teeth of the spur gear (645), and the meshing length of the reciprocating screw (649) and the linkage rod (648) is greater than the length of the spur gear (646).

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