Desulfurization and denitrification integrated process for refining tail gas

Abstract

The invention relates to the technical field of tail gas desulfurization and denitrification, in particular to a refining tail gas desulfurization and denitrification integrated process which comprises a tower drum, a waste gas pipe and a liquid medicine pipe, the liquid medicine pipe and the waste gas pipe penetrate through the outer surface of the tower drum, a liquid spraying frame is arranged in the tower drum, and a gas spraying frame is arranged below the liquid spraying frame. A rotatable processing structure is arranged in the tower and located between the air spraying frame and the liquid spraying frame, a hollow transfer structure capable of supplying liquid to the liquid spraying frame is installed at the lower end of the tower, a backflow pipe is installed on the outer surface of the tower in a penetrating mode, and the lower end of the backflow pipe is communicated with the interior of the transfer structure. Reaction liquid and waste gas can be reversed in a reciprocating mode in the rotation process of the overturning structure, the reaction time of the waste gas and the reaction liquid is prolonged, the gas spraying frame sprays gas outwards, the liquid spraying frame enables the reaction liquid to form a mist shape to make contact with the reacted waste gas again, and the reaction degree of the waste gas and the reaction liquid is further increased; the pollution residual quantity of discharged waste gas is reduced; the reaction degree of reaction liquid is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas desulfurization and denitrification, and particularly to an integrated process for desulfurization and denitrification of refining tail gas. Background Art

[0002] According to the dry and wet states of the absorbent and desulfurization products during the desulfurization process, desulfurization technologies can be divided into wet method, dry method and semi-dry (semi-wet) method. The 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 rate, simple equipment and high desulfurization efficiency. In wet desulfurization and denitrification, the reaction liquid is often sprayed to contact and absorb the waste gas.

[0003] Chinese Patent CN211358323U discloses an industrial tail gas desulfurization and denitrification treatment device. Aiming at the problem that the existing desulfurization and denitrification treatment device has a poor effect when spraying the tail gas, and the tail gas cannot be evenly sprayed, reducing the treatment effect, the following scheme is now proposed. It includes a denitrification tower, an air inlet pipe and an air outlet pipe are fixedly connected to the denitrification tower. A water pump is fixedly installed on one side of the denitrification tower. A connecting pipe is fixedly connected to the water outlet of the water pump. Three branch pipes are fixedly connected to the connecting pipe. The three branch pipes are all fixedly installed in the denitrification tower. A plurality of nozzles are fixedly connected to the three branch pipes. Guide plates are fixedly connected to both inner walls of the two sides of the denitrification tower. A moving seat is slidably installed in the denitrification tower. The utility model has a reasonable structure and is convenient to operate. The desulfurization and denitrification treatment device has a good effect when spraying the tail gas, can evenly spray the tail gas, and improves the treatment effect. The above related technologies have the following defects: In the existing technology, the treatment liquid is generally formed into a spray and opposed to the waste gas, so that the spray-shaped treatment liquid contacts and reacts with the waste gas. However, the contact time between the waste gas and the treatment liquid is too short, which easily causes incomplete desulfurization and denitrification in the discharged waste gas, resulting in environmental pollution. At the same time, the treatment liquid does not react completely, resulting in waste of the reaction liquid raw materials. Therefore, an integrated process for desulfurization and denitrification of refining tail gas is proposed. Summary of the Invention

[0004] In order to ensure the full reaction between the reaction liquid and the waste gas, the present invention provides an integrated process for desulfurization and denitrification of refining tail gas.

[0005] An integrated process for desulfurization and denitrification of refining tail gas provided by the present invention adopts the following technical scheme: It includes a tower barrel, a waste gas pipe and a liquid medicine pipe. The liquid medicine pipe and the waste gas pipe penetrate through the outer surface of the tower barrel. A liquid spraying rack is arranged inside the tower barrel. A gas jetting rack is arranged below the liquid spraying rack. A rotatable treatment structure is arranged between the gas jetting rack and the liquid spraying rack inside the tower barrel. A transfer structure with a hollow interior for supplying liquid to the liquid spraying rack is installed at the lower end of the tower barrel. A reflux pipe penetrates through the outer surface of the tower barrel, and the lower end of the reflux pipe is communicated with the inside 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 connected and installed on the inner side of the inner ring of the ring frame. The inside of the flipping structure is a cavity. A transmission structure capable of driving the flipping structure to rotate is installed inside the tower barrel. Shaft tubes are fixed at both ends of the ring frame. The shaft tubes are connected to the flipping structure in a vertical state. The other ends of the shaft tubes are in sliding contact with the inner wall of the tower barrel. The shaft tubes penetrate through the end faces of the adjacent end rings.

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

[0008] Optionally, the distances from the air extraction pipe, waste gas pipe, return pipe, and liquid medicine pipe to the axis of the tower barrel are equal to the distance from the shaft tube to the axis of the tower barrel. The air extraction pipe, return pipe, liquid medicine pipe, and waste gas pipe are equidistantly distributed clockwise around the axis of the tower barrel. Arc grooves are provided on the inner wall of the tower barrel at the connection positions of the air extraction pipe, return pipe, liquid medicine pipe, and waste gas pipe. The included angle of the arc of the arc groove is smaller than the distance between adjacent two ring frames.

[0009] Optionally, the transfer structure includes a liquid transfer column and a turntable. The liquid transfer column is coaxially and rotatably inserted inside the tower barrel. The upper end of the liquid transfer column is in rotational contact with an end plate. The end plate and the turntable are fixedly inserted inside the tower barrel. The lower end of the liquid transfer column is in contact with the upper surface of the turntable. A plurality of liquid transfer grooves are vertically formed through the liquid transfer column. The return pipe is inserted from the circumferential surface of the end plate and penetrates through the bottom surface of the end plate flush. A drain pipe is installed through the bottom surface of the turntable. The other end of the drain pipe penetrates through the axis position of the inner bottom wall of the tower barrel. The end plate is provided with a return groove penetrating up and down. 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 liquid transfer column. A hole-like structure is formed between the plurality of liquid transfer grooves at the axis position of the liquid transfer column. A power extraction pipe is arranged inside the hole-like structure of the liquid transfer column. The lower end of the power extraction pipe penetrates 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 and installed with a liquid spraying frame.

[0010] Optionally, the flipping structure includes a concentric ring and an axis cylinder. The concentric ring is coaxially and rotatably inserted inside the ring frame. The axis cylinder is fixedly inserted inside the concentric ring. The axis of the axis cylinder is perpendicular to and intersects with the axis of the concentric ring. A through-hole plate is inserted at the central position inside the axis cylinder. Hole-like structures communicating with the inside are provided at both ends of the axis cylinder. The shaft tube is connected to the hole-like structure of the axis 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 rotationally inserted on 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 on the outer surfaces of the power extraction pipe and the extraction air 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 axis cylinder. A spur gear is coaxially fixed on the short shaft. A spur gear plate is tangentially arranged on one side of the spur gear. A linkage rod is fixed at one end of the spur gear plate close to the ring cylinder. A support frame is fixed on the end face of the ring frame. The support frame is slidably sleeved on the outer surface of the linkage rod. The linkage rod slidably penetrates through the circumferential side surface of the ring cylinder. A reciprocating lead screw is threadedly inserted at one end of the linkage rod inside the ring cylinder. A sleeve shaft is slidably sleeved at one end of the linkage rod inside the ring cylinder. The sleeve shaft is coaxially fixed with the reciprocating lead 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 inside of the through-hole plate is hollow. A blocking frame that moves along the axis of the short shaft is inserted inside the through-hole plate. Through-hole-shaped structures are evenly distributed in rows on the upper and lower surfaces of the through-hole plate. The blocking frame is a plate-shaped structure on one side of each row of through-hole-shaped structures. A sliding shaft is slidably inserted at the axis of the short shaft. The sliding shaft is fixed to the blocking frame. The blocking frame is elastically connected to the inner wall of the through-hole plate. A bending plate is arranged on one side of the sliding shaft outside the short shaft. The middle position of the bending plate bends away from the sliding shaft. The bending plate is slidably sleeved on the outer surface of the support frame. A plurality of evenly distributed elastic blocking plates are fixed on the upper surface of the bending plate. A connecting rod is fixed on the front surface of the spur gear plate. An elastic dial plate 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 bending plate away from the sliding shaft. Both ends of the double-headed telescopic rod are fixed to the support frame.

[0013] Optionally, the elastic dial plate is arranged parallel to the elastic blocking plate. The lower end of the elastic dial plate is located below the upper end of the elastic blocking plate. The upper and lower surfaces of the blocking frame are respectively in sliding contact with the inner walls of the upper and lower sides of the through-hole plate.

[0014] Optionally, a synchronous gear ring is rotationally inserted inside the tower barrel. The ring frame is fixedly installed on the inner wall of the synchronous gear ring. A double-headed power box is fixed on the outer surface of the tower barrel. A lower gear meshes with the outer ring surface of the liquid transmission column. The lower gear penetrates through the inner wall of the tower barrel. The lower gear is connected to an output end of the double-headed power box. An upper gear meshes with the outer ring surface of the synchronous gear ring. The upper gear penetrates through the inner wall of the tower barrel. The upper gear is fixed to the other output end of the double-headed power box.

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

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

[0017] 1. The present invention sets up components such as a liquid spraying frame, a gas jetting frame, a reflux pipe, and a flipping structure. The waste gas and the new reaction liquid are filled into the interior of the flipping structure. During the rotation of the flipping structure, the reaction liquid and the waste gas are reciprocally inverted, increasing the reaction time between the waste gas and the reaction liquid. The absorbed waste gas is filled into the gas jetting frame by the suction pipe, causing the gas jetting frame to jet outwards. Then, the reacted reaction liquid is filled into the liquid spraying frame, causing the liquid spraying frame to form the reaction liquid into a spray and contact the reacted waste gas again, further increasing the reaction degree between the waste gas and the reaction liquid, reducing the pollution residue of the discharged waste gas, and increasing the reaction degree of the reaction liquid.

[0018] 2. The present invention sets up components such as a liquid transfer column, a reflux groove, a drain pipe, and a liquid transfer groove. During the rotation of the ring frame driven by the end ring, the central cylinder is sequentially connected to the suction pipe, the reflux pipe, the liquid medicine pipe, and the waste gas pipe. The suction pipe extracts the reacted gas. Then, the reflux pipe fills the reacted liquid into the liquid transfer groove. During the continuous rotation of the end ring, the liquid medicine pipe fills the central cylinder with a new reaction liquid through the shaft pipe. Then, the waste gas pipe fills the central cylinder with new waste gas. During the rotation of the liquid transfer column, the reaction liquid added to the liquid transfer groove through the reflux pipe is driven to be connected to the power suction pipe. The power suction pipe fills the reaction liquid into the liquid spraying frame. The reaction liquid sprayed by the liquid spraying frame flows into the reflux groove. The liquid transfer groove with the reaction liquid drained is connected to the reflux groove during the rotation of the liquid transfer column. After the reaction liquid in the reflux groove enters the liquid transfer groove, it is connected to the drain pipe, and the reaction liquid after multiple reactions is discharged from the drain pipe.

[0019] 3. The present invention sets up components such as a through-hole plate, a blocking frame, a bending plate, an elastic dial plate, and an elastic blocking plate. During the rotation of the ring frame driven by the end ring around the central cylinder, the bevel gear is driven to mesh with the central bevel gear ring. The bevel gear drives the reciprocating lead screw to mesh with the linkage rod, driving the linkage rod to reciprocate. The straight-tooth plate and the linkage rod move synchronously with the linkage rod. The straight-tooth plate drives the elastic blocking plate to drive the bending plate to rotate through the elastic dial plate. Before the straight-tooth plate meshes with the straight gear, the bending plate drives the blocking frame to block the hole structure of the through-hole plate by pushing the sliding shaft. Then, after the straight-tooth plate meshes with the straight gear, it drives the central cylinder to rotate half a turn. At the same time, during the rotation of the central cylinder, the waste gas and the reaction liquid are respectively located on both sides of the through-hole plate. After the straight-tooth plate disengages from the straight gear, the elastic dial plate disengages from the elastic blocking plate. Then, the blocking frame disengages from the blockage of the hole structure under the elastic connection with the through-hole plate, enabling the reaction liquid rotated to the upper side to flow downward through the hole structure of the through-hole plate, while the waste gas on the lower side flows upward to contact and react with the reaction liquid. Brief Description of the Drawings

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

[0021] Figure 2 is the schematic diagram of the top view structure in the embodiment of the present invention;

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

[0023] Figure 4 It is a schematic diagram of the connection structure between the ring barrel and the central barrel in the embodiment of the present invention;

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

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

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

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

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

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

[0030] Reference numerals: 1, tower barrel; 2, waste gas pipe; 3, liquid medicine pipe; 4, liquid spraying frame; 5, air jetting frame; 6, treatment structure; 61, ring frame; 62, end ring; 63, flipping structure; 631, concentric ring; 632, axis barrel; 633, through-hole plate; 6331, blocking frame; 6332, sliding shaft; 6333, bending plate; 6334, elastic blocking plate; 6335, elastic dialing plate; 6336, double-headed telescopic rod; 6337, connecting rod; 64, transmission structure; 641, central bevel gear ring; 642, ring barrel; 643, central barrel; 644, short shaft; 645, spur gear; 646, spur gear plate; 647, support frame; 648, linkage rod; 649, reciprocating lead screw; 6410, sleeve shaft; 6411, bevel gear; 65, shaft pipe; 7, transmission structure; 71, liquid transmission column; 72, turntable; 73, end plate; 74, liquid transmission groove; 75, drain pipe; 76, return groove; 77, power suction pipe; 8, return pipe; 9, suction pipe; 10, arc groove; 11, synchronous toothed ring; 12, double-headed power box; 13, lower gear; 14, upper gear. Detailed implementation manners

[0031] The following will further describe the present invention in detail with reference to the attached Figures 1 - 10 drawings.

[0032] An embodiment of the present invention discloses an integrated process for desulfurization and denitrification of refinery tail gas. As Figures 1 - 10As shown in the figure, it includes a tower barrel 1, an exhaust gas pipe 2 and a liquid medicine pipe 3. The upper end of the tower barrel 1 can discharge the purified gas. The liquid medicine pipe 3 is connected to a medicine supply device, and the medicine supply device fills the liquid medicine into the liquid medicine pipe 3. 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 through the outer surface of the tower barrel 1. Inside the tower barrel 1, there is a liquid spraying rack 4. The bottom surface of the liquid spraying rack 4 can spray water mist downward. Below the liquid spraying rack 4, there is a gas jetting rack 5. The upper surface of the gas jetting rack 5 is air-permeable to allow the gas inside to be discharged.

[0033] Inside the tower barrel 1, between the gas jetting rack 5 and the liquid spraying rack 4, there is a rotatable treatment structure 6. At the lower end of the tower barrel 1, there is a transfer structure 7 with a hollow interior that can supply liquid to the liquid spraying rack 4. The outer surface of the tower barrel 1 is penetrated and installed with a return pipe 8. A water pump is installed on the part of the return pipe 8 located outside the tower barrel 1, which can assist in driving the reaction liquid to flow. The lower end of the return pipe 8 is communicated with the inside of the transfer structure 7, and the transfer structure 7 with a hollow interior can store the reaction liquid.

[0034] The transfer structure 7 includes a liquid transfer column 71 and a turntable 72. The liquid transfer column 71 is rotationally inserted coaxially inside the tower barrel 1. The upper end of the liquid transfer column 71 is in rotational contact with an end plate 73. The end plate 73 and the turntable 72 are fixedly inserted inside the tower barrel 1. The lower end of the liquid transfer column 71 is in contact with the upper surface of the turntable 72. The liquid transfer column 71 is vertically penetrated with a plurality of liquid transfer grooves 74. The return pipe 8 is inserted from the circumferential surface of the end plate 73 and penetrates through the bottom surface of the end plate 73 flush. A drain pipe 75 is installed through the bottom surface of the turntable 72, and the other end of the drain pipe 75 penetrates through the axis of the inner bottom wall of the tower barrel 1. The drain pipe 75 can discharge the reaction liquid in the connected liquid transfer grooves 74.

[0035] The end plate 73 is provided with a return groove 76 that penetrates up and down. After the reaction liquid sprayed by the liquid spraying rack 4 flows into the return groove 76, the reaction liquid in the return groove 76 flows into the connected liquid transfer grooves 74. The lower end of the return pipe 8, the lower end of the return groove 76, and the upper end of the drain pipe 75 are arranged clockwise around the axis of the liquid transfer column 71. The part located at the axis of the liquid transfer column 71 between the plurality of liquid transfer grooves 74 is a hole structure. Inside the hole structure of the liquid transfer column 71, there is a power suction pipe 77. A water pump is installed on the power suction pipe 77 located outside the tower barrel 1, which can pump the reaction liquid upward. The lower end of the power suction pipe 77 penetrates through the bottom surface of the turntable 72. The end plate 73 is fixedly sleeved on the outer surface of the power suction pipe 77. The upper end of the power suction pipe 77 is connected and installed with the liquid spraying rack 4. The power suction pipe 77 can fill the reaction liquid in the connected liquid transfer grooves 74 into the liquid spraying rack 4.

[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 flipping structure 63 is installed on the inner side of the inner ring of the ring frame 61. The inside of the flipping structure 63 is a cavity, and waste gas and reaction liquid can be stored in the flipping structure 63. During the rotation of the flipping structure 63, the waste gas and reaction liquid inside can be driven to flip. The waste gas has a tendency to flow upward, and the reaction liquid has a tendency to flow downward. The flowing waste gas and reaction liquid gradually increase the reaction degree during continuous counter-flushing. A transmission structure 64 that can drive the flipping structure 63 to rotate is installed inside the tower barrel 1.

[0037] The flipping structure 63 includes a concentric ring 631 and an axis barrel 632. The concentric ring 631 is rotationally inserted coaxially inside the ring frame 61, and the axis barrel 632 is fixedly inserted inside the concentric ring 631. The axis of the axis barrel 632 is perpendicular to and intersects the axis of the concentric ring 631. A through-hole plate 633 is inserted at the central position inside the axis barrel 632. The through-hole plate 633 can divide the inside of the axis barrel 632 into two spaces. Hole-shaped structures communicating with the inside are opened at both ends of the axis barrel 632. A shaft tube 65 communicates with the hole-shaped structure of the axis barrel 632 in the vertical state. Shaft tubes 65 are fixed at both ends of the ring frame 61. The shaft tube 65 communicates with the flipping structure 63 in the vertical state. The other end of the shaft tube 65 is in sliding contact with the inner wall of the tower barrel 1. The shaft tube 65 penetrates the end face of the adjacent end ring 62. When the shaft tube 65 communicates with the return pipe 8, the return pipe 8 can pump the reaction liquid in the axis barrel 632 into the connected liquid transfer tank 74.

[0038] A synchronous gear ring 11 is rotationally inserted inside the tower barrel 1. 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 barrel 1. A lower gear 13 meshes with the outer ring surface of the liquid transfer column 71. The lower gear 13 penetrates the inner wall of the tower barrel 1 and is connected to an output end of the double-headed power box 12. An upper gear 14 meshes with the outer ring surface of the synchronous gear ring 11. The upper gear 14 penetrates the inner wall of the tower barrel 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 ends of the double-headed power box 12 through couplings. 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 on 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 surfaces of the power extraction pipe 77 and the extraction air 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 center 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 arranged tangentially on one side of the spur gear 645 and can mesh with the spur gear 645 during the movement of the spur gear plate 646. A linkage rod 648 is fixed at one end of the spur gear plate 646 close to the ring cylinder 642.

[0040] The inside of the through-hole plate 633 is hollow. A plug frame 6331 that moves along the axis of the short shaft 644 is inserted inside the through-hole plate 633. The plug frame 6331 moves along the axis direction of the short shaft 644. Through-hole-like structures are arranged in rows and evenly distributed on the upper and lower surfaces of the through-hole plate 633. The plug frame 6331 is a plate-like structure on one side of each row of through-hole-like structures. The plate-like structure of the plug frame 6331 can respectively block the corresponding row of through-hole-like structures of the through-hole plate 633. A sliding shaft 6332 is slidably inserted at the axis of the short shaft 644. The sliding shaft 6332 is fixed to the plug frame 6331. The plug frame 6331 is elastically connected to the inner wall of the through-hole plate 633. The elastic connection method can be materials that can elastically expand and contract such as springs, elastic telescopic rods, and elastic members. The elastic connection between the plug frame 6331 and the through-hole plate 633 has a tendency to cause the plug frame 6331 to be misaligned with the through-hole-like structures of the through-hole plate 633.

[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 slidably penetrates the circumferential side surface of the ring cylinder 642. A reciprocating lead screw 649 is threadedly inserted at 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 to the reciprocating lead screw 649. During the rotation of the reciprocating lead screw 649, it drives the spur gear plate 646 to reciprocate by meshing with the linkage rod 648.

[0042] The number of teeth of the spur gear plate 646 is half of the number of teeth of the spur gear 645. During one meshing of the spur gear plate 646 and the spur gear 645, it can drive the shaft center cylinder 632 to rotate half a turn. The meshing length of the reciprocating lead screw 649 and the linkage rod 648 is greater than the length of the spur gear plate 646. During the rotation of the reciprocating lead screw 649 and its meshing with the linkage rod 648 to drive the linkage rod 648 to reciprocate, it drives the spur gear plate 646 to reciprocate and mesh with and then disengage from the spur gear 645.

[0043] The sleeve shaft 6410 is rotatably connected to the inner wall of the annular 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. During the rotation of the bevel gear 6411 around the axis of the annular cylinder 642, it drives the reciprocating lead screw 649 and the sleeve shaft 6410 to rotate around the axis of the bevel gear 6411 through meshing with the central bevel gear ring 641.

[0044] A bending plate 6333 is arranged on the outer side of the short shaft 644 where the sliding shaft 6332 is located. The middle position of the bending plate 6333 bends away from the sliding shaft 6332. The bending plate 6333 is slidably sleeved on the outer surface of the support frame 647. A plurality of uniformly distributed elastic blocking plates 6334 are fixed on the upper surface of the bending plate 6333. A connecting rod 6337 is fixed on the front surface of the straight tooth plate 646. The bottom surface of the other end of the connecting rod 6337 is fixed with an elastic dial plate 6335. The elastic dial plate 6335 is arranged in parallel with the elastic blocking plate 6334. The lower end of the elastic dial plate 6335 is located below the upper end of the elastic blocking plate 6334. The upper and lower surfaces of the blocking frame 6331 are respectively in sliding contact with the inner walls on the upper and lower sides of the through-hole plate 633. A double-headed telescopic rod 6336 is fixed on the side of the bending 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 bending plate 6333, both ends of the double-headed telescopic rod 6336 expand and contract synchronously. When the double-headed telescopic rod 6336 reaches the maximum expansion and contraction amount, the bending plate 6333 stops moving. At this time, the bent part of the bending plate 6333 is misaligned with the sliding shaft 6332. The double-headed telescopic rod 6336 drives the bent part of the bending plate 6333 to coincide with the sliding shaft 6332. When the sliding shaft 6332 is located at the bent part of the bending plate 6333, the plate-shaped structure of the blocking frame 6331 is misaligned with the hole-shaped structure of the through-hole plate 633. When the bent part of the bending plate 6333 is misaligned with the sliding shaft 6332, the bending plate 6333 pushes the plate-shaped structure of the blocking frame 6331 through the sliding shaft 6332 to block the hole-shaped structure of the through-hole plate 633. During the reciprocating movement of the straight tooth plate 646 driven by the linkage rod 648, before the straight tooth plate 646 meshes with the spur gear 645 each time, the elastic blocking plate 6334 is first pushed by the elastic dial plate 6335 to drive the bent part of the bending plate 6333 to be misaligned with the sliding shaft 6332. After the straight tooth plate 646 disengages from the spur gear 645, when the straight tooth plate 646 continues to move, the elastic dial plate 6335 is elastically bent and misaligned relative to the elastic blocking plate 6334, so that during the rotation of the central shaft cylinder 632, the blocking frame 6331 blocks the hole-shaped structure of the through-hole plate 633. After the central shaft cylinder 632 rotates half a week each time, the blocking frame 6331 disengages from the through-hole plate 633. Then the reaction liquid on the upper side of the through-hole plate 633 flows downward through the hole-shaped structure of the through-hole plate 633, and the waste gas on the lower side of the through-hole plate 633 flows upward through the hole-shaped structure of the through-hole plate 633. The waste gas and the reaction liquid flow in a countercurrent manner to react and absorb the harmful gases in the waste gas.

[0045] An exhaust pipe 9 is installed through the upper surface of the tower barrel 1, and the other end of the exhaust pipe 9 is connected and installed with the jet rack 5. The distances from the exhaust pipe 9, the waste gas pipe 2, the return pipe 8, and the liquid medicine pipe 3 to the axis of the tower barrel 1 are equal to the distance from the shaft tube 65 to the axis of the tower barrel 1. The exhaust pipe 9, the return pipe 8, the liquid medicine pipe 3, and the waste gas pipe 2 are equidistantly distributed clockwise around the axis of the tower barrel 1. During the rotation of the end ring 62 driving the ring rack 61, the central axis cylinder 632 is successively communicated with the exhaust pipe 9, the return pipe 8, the liquid medicine pipe 3, and the waste gas pipe 2. The exhaust pipe 9 extracts the reacted gas, and then the return pipe 8 fills the reacted liquid into the liquid transfer tank 74. During the continuous rotation of the end ring 62, the liquid medicine pipe 3 fills the new reaction liquid into the central axis cylinder 632 through the shaft tube 65, and then the waste gas pipe 2 fills the new waste gas into the central axis cylinder 632. During the rotation of the liquid transfer column 71, the reacted liquid added to the liquid transfer tank 74 through the return pipe 8 is driven to be communicated with the power extraction pipe 77. The power extraction pipe 77 fills the reacted liquid into the liquid spraying rack 4. The reacted liquid sprayed by the liquid spraying rack 4 flows into the return tank 76. The liquid transfer tank 74 from which the reacted liquid has been drained is communicated with the return tank 76 during the rotation of the liquid transfer column 71. After the reacted liquid in the return tank 76 enters the liquid transfer tank 74, it is communicated with the drain pipe 75, and the reacted liquid after multiple reactions is discharged from the drain pipe 75.

[0046] Arc grooves 10 are provided at the joints of the inner wall of the tower barrel 1 where the exhaust pipe 9, the return pipe 8, the liquid medicine pipe 3, and the waste gas pipe 2 are located. The arc angle of the arc groove 10 is smaller than the distance between two adjacent ring racks 61. The arc groove 10 increases the communication time between the shaft tube 65 and the exhaust pipe 9, the return pipe 8, the liquid medicine pipe 3, and the waste gas pipe 2.

[0047] The working principle is as follows: The medicine supply device fills the reaction liquid into the liquid medicine pipe 3. The waste gas pipe 2 is connected to the device generating waste gas. The waste gas and the reaction liquid are filled into the flipping structure 63 through the shaft tube 65 where the liquid medicine pipe 3 and the waste gas pipe 2 are communicated. During the continuous flipping of the flipping structure 63, the waste gas and the reaction liquid are mixed upside down. The reaction liquid has a downward flowing tendency, and the waste gas has an upward flowing tendency. During the flowing of the reaction liquid and the waste gas, they are mixed by counterflow. The absorbed waste gas is filled into the jet rack 5 by the exhaust pipe 9, so that the jet rack 5 jets outwards. The jetted waste gas flows upwards in the tower barrel 1, and then the reacted reaction liquid is filled into the liquid spraying rack 4, so that the liquid spraying rack 4 forms the reaction liquid into a spray and flows downwards to contact the reacted waste gas again, further increasing the reaction degree between the waste gas and the reaction liquid.

[0048] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. An integrated process for desulfurization and denitrification of refinery tail gas, comprising a tower cylinder (1), a waste gas pipe (2) and a liquid medicine pipe (3), the liquid medicine pipe (3) and the waste gas pipe (2) penetrate through the outer surface of the tower cylinder (1), and it is characterized in that: Inside the tower barrel (1), a liquid spraying rack (4) is provided. Below the liquid spraying rack (4), a gas spraying rack (5) is provided. Inside the tower barrel (1), between the gas spraying rack (5) and the liquid spraying rack (4), a rotatable treatment structure (6) is provided. At the lower end of the tower barrel (1), a transfer structure (7) with a hollow interior for supplying liquid to the liquid spraying rack (4) is installed. The outer surface of the tower barrel (1) is penetrated and installed with a return pipe (8), and the lower end of the return pipe (8) is communicated with the interior of the transfer structure (7); The treatment structure (6) includes a ring rack (61) and two end rings (62). The ring rack (61) is located between the two end rings (62). The inner ring side of the ring rack (61) is communicated and installed with a rotatable flipping structure (63). The interior of the flipping structure (63) is a cavity. Inside the tower barrel (1), a transmission structure (64) for driving the flipping structure (63) to rotate is installed. At both ends of the ring rack (61), a shaft tube (65) is fixed. The shaft tube (65) is communicated with 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 barrel (1). The shaft tube (65) penetrates through the end face of the adjacent end ring (62); The upper surface of the tower barrel (1) is penetrated and installed with an air extraction pipe (9), and the other end of the air extraction pipe (9) is communicated and installed with the gas spraying rack (5).

2. The integrated process for desulfurization and denitrification of refining tail gas according to claim 1, characterized in that: The distances from the air extraction pipe (9), the waste gas pipe (2), the return pipe (8), and the liquid medicine pipe (3) to the axis of the tower barrel (1) are equal to the distance from the shaft tube (65) to the axis of the tower barrel (1). The air extraction pipe (9), the return pipe (8), the liquid medicine pipe (3), and the waste gas pipe (2) are equidistantly distributed clockwise around the axis of the tower barrel (1). Arc grooves (10) are opened at the connection positions of the air extraction pipe (9), the return pipe (8), the liquid medicine pipe (3), and the waste gas pipe (2) on the inner wall of the tower barrel (1). The circular arc angle of the arc groove (10) is smaller than the distance between adjacent two ring racks (61).

3. The integrated process for desulfurization and denitrification of refinery tail gas according to claim 1, characterized in that: The transfer structure (7) includes a liquid transfer column (71) and a turntable (72). The liquid transfer column (71) is coaxially and rotatably inserted inside the tower barrel (1). The upper end of the liquid transfer column (71) is in rotational contact with an end plate (73). The end plate (73) and the turntable (72) are fixedly inserted inside the tower barrel (1). The lower end of the liquid transfer column (71) is in contact with the upper surface of the turntable (72). A plurality of liquid transfer grooves (74) are vertically penetrated through the liquid transfer column (71). The return pipe (8) is inserted from the circumferential surface of the end plate (73) and penetrates through the bottom surface of the end plate (73) flush. A drain pipe (75) is installed through the bottom surface of the turntable (72), and the other end of the drain pipe (75) penetrates through the axis position of the inner bottom wall of the tower barrel (1). The end plate (73) is provided with a return groove (76) penetrating up and down. The lower end of the return pipe (8), the lower end of the return groove (76), and the upper end of the drain pipe (75) are arranged clockwise around the axis of the liquid transfer column (71). The position at the axis of the liquid transfer column (71) between the plurality of liquid transfer grooves (74) is a hole structure. Inside the hole structure of the liquid transfer column (71), a power extraction pipe (77) is arranged. The lower end of the power extraction pipe (77) penetrates 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 communicated and installed with the liquid spraying rack (4).

4. The integrated process for desulfurization and denitrification of refining tail gas according to claim 3, wherein: The flipping structure (63) includes a concentric ring (631) and an axial center cylinder (632). The concentric ring (631) is rotationally inserted coaxially inside the ring frame (61). The axial center cylinder (632) is fixedly inserted inside the concentric ring (631). The axis of the axial center cylinder (632) intersects perpendicularly with the axis of the concentric ring (631). A through-hole plate (633) is inserted at the central position inside the axial center cylinder (632). Hole-shaped structures communicating with the inside are formed at both ends of the axial center cylinder (632). The shaft tube (65) communicates with the hole-shaped structure of the axial center cylinder (632) in the vertical state.

5. The integrated process for desulfurization and denitrification of refinery tail gas according to claim 4, characterized in that: 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 rotationally inserted on 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 surfaces of the power extraction tube (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 central position on the outer surface of the axial center cylinder (632). A spur gear (645) is coaxially fixed on the short shaft (644). A spur gear plate (646) is arranged tangentially on one side of the spur gear (645). A linkage rod (648) is fixed at one end of the spur gear plate (646) close to the ring cylinder (642). A support frame (647) is fixed on 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) slidably penetrates through the circumferential side surface of the ring cylinder (642). A reciprocating lead screw (649) is threadedly inserted at one end of the linkage rod (648) located inside the ring cylinder (642). A sleeve shaft (6410) is slidably sleeved at one end of the linkage rod (648) located inside the ring cylinder (642). The sleeve shaft (6410) is coaxially fixed with the reciprocating lead 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).

6. The integrated process for desulfurization and denitrification of refinery tail gas according to claim 5, characterized in that: The inside of the perforated plate (633) is hollow. A blocking frame (6331) that moves along the axis of the short shaft (644) is inserted into the inside of the perforated plate (633). The upper and lower surfaces of the perforated plate (633) are provided with rowed and evenly distributed perforated structures. The blocking frame (6331) located on one side of each row of perforated structures is a plate-like structure. A sliding shaft (6332) is slidably inserted at the axis of the short shaft (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). A bending plate (6333) is arranged on the outer side of the sliding shaft (6332) located outside the short shaft (644). The middle position of the bending plate (6333) bends away from the sliding shaft (6332). The bending plate (6333) is slidably sleeved on the outer surface of the support frame (647). A plurality of evenly distributed elastic blocking plates (6334) are fixed on the upper surface of the bending plate (6333). A connecting rod (6337) is fixed to the front surface of the straight tooth plate (646). The bottom surface of the other end of the connecting rod (6337) is fixed with an elastic dial (6335). A double-headed telescopic rod (6336) is fixed to the surface of the bending plate (6333) away from the sliding shaft (6332). Both ends of the double-headed telescopic rod (6336) are fixed to the support frame (647).

7. The integrated process for desulfurization and denitrification of refining tail gas according to claim 6, characterized in that: The elastic dial (6335) is arranged in parallel with the elastic blocking plate (6334). The lower end of the elastic dial (6335) is located below the upper end of the elastic blocking plate (6334). The upper and lower surfaces of the blocking frame (6331) are respectively in sliding contact with the inner walls of the upper and lower sides of the perforated plate (633).

8. The integrated process for desulfurization and denitrification of refinery tail gas according to claim 3, characterized in that: A synchronous gear ring (11) is rotatably inserted into the inside of the tower barrel (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 to the outer surface of the tower barrel (1). A lower gear (13) is meshed with the outer ring surface of the liquid transmission column (71). The lower gear (13) penetrates the inner wall of the tower barrel (1). The lower gear (13) is connected to an output end of the double-headed power box (12). An upper gear (14) is meshed with the outer ring surface of the synchronous gear ring (11). The upper gear (14) penetrates the inner wall of the tower barrel (1). The upper gear (14) is fixed to the other output end of the double-headed power box (12).

9. A refining tail gas desulfurization and denitrification integrated process according to claim 5, characterized in that: The number of teeth of the straight tooth plate (646) is equal to half of the number of teeth of the spur gear (645). The meshing length of the reciprocating lead screw (649) and the linkage rod (648) is greater than the length of the straight tooth plate (646).

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