A spiral material return device and spiral material return process for semi-dry desulfurization process

Abstract

The present invention discloses a spiral return device and a spiral return process for a semi-dry desulfurization process, wherein the spiral return device comprises a cylinder, a feed assembly and a discharge pipe, the upper part of the cylinder is connected to a return box filled with return material through the feed assembly, and the lower part of the cylinder is connected to a desulfurization tower through the discharge pipe, a screw conveyor is arranged in the cylinder, the feed assembly comprises a feed hopper, a feed pipe, a shaking mechanism and a protective shell, and a moving mechanism is arranged below the shaking mechanism; the present invention arranges components such as a feed assembly, a screw conveyor and a discharge pipe, so that the return material in the return box can enter the desulfurization tower for use, and the return material falling into the shaking trough from the feed pipe can be intermittently pushed into the cylinder to prevent a large amount of return material from falling into the cylinder and being squeezed and sticking into blocks, thereby affecting the material transportation effect of the screw conveyor, and shaking the return material makes the return material looser to prevent it from sticking into blocks.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning and drying devices, and in particular to a spiral material returning device and a spiral material returning process for a semi-dry desulfurization process. Background Art

[0002] In the operation of the semi-dry flue gas desulfurization process currently used, the return device of the desulfurization ash is one of the key factors affecting the desulfurization efficiency and the stable and reliable operation of the entire desulfurization system. At present, the semi-dry desulfurization process mainly uses traditional air chute to return the desulfurization ash.

[0003] Because desulfurization ash in the semi-dry desulfurization process is susceptible to moisture and agglomeration, and its particle size distribution is very uneven, using traditional air chutes for return flow can easily cause ash blockage within the system, affecting desulfurization efficiency and the operational stability of the entire desulfurization system. Therefore, it is necessary to design a spiral return device and spiral return process for the semi-dry desulfurization process. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a spiral material return device and a spiral material return process for a semi-dry desulfurization process.

[0005] The technical solution of the present invention is: a spiral return material device and spiral return material process for a semi-dry desulfurization process, comprising a horizontally placed cylinder, a feed assembly, and a discharge pipe. The upper portion of the cylinder is connected to a return material box filled with return material through the feed assembly, and the lower portion of the cylinder is connected to a desulfurization tower through the discharge pipe. The discharge pipe is located on one side of the feed assembly.

[0006] A screw conveyor is provided in the cylinder between the feed assembly and the discharge pipe, one end of the rotating shaft of the screw conveyor passes through the cylinder and is rotatably connected thereto, and one end of the cylinder is provided with a first motor for driving the rotating shaft to rotate;

[0007] The feeding assembly includes a feeding hopper, a feeding pipe, a shaking mechanism and a protective shell. The feeding pipe and the shaking mechanism are arranged in the protective shell. The feeding hopper is located above the shaking mechanism. The lower end of the feeding hopper passes through the protective shell and is fixedly connected thereto. The feeding pipe is located below the shaking mechanism. The side wall of the feeding pipe is fixedly connected to the inner wall of the protective shell.

[0008] The shaking mechanism includes a shaking groove arranged in the horizontal direction, a bracket, a first connecting rod arranged in the vertical direction, and a second connecting rod arranged in the horizontal direction, a slider perpendicular to the shaking groove is provided at the bottom of the shaking groove, a sliding groove for the slider to pass through and be slidably connected to the slider is provided at the upper end of the bracket, the lower end of the bracket is fixedly connected to the cylinder, the first connecting rod is located on one side of the shaking groove, a support rod for supporting the first connecting rod is provided on the side of the sliding groove, a second motor for driving the first connecting rod to rotate is provided on the support rod, and one end of the second connecting rod is rotatably connected to the lower end of the first connecting rod;

[0009] A moving mechanism in contact with the slider is provided on the bracket below the slide, the moving mechanism comprising a turntable and a third connecting rod arranged in the vertical direction, a rotating shaft is provided at a position away from the center of the turntable, one end of the rotating shaft passes through the turntable and is rotatably connected to the bracket, the other end of the rotating shaft is fixedly connected to one end of the third connecting rod, and the other end of the third connecting rod is rotatably connected to the second connecting rod;

[0010] A push plate is provided in the shaking groove for pushing the returned material into the feed pipe. The push plate is slidingly connected to the shaking groove. A fourth connecting rod is provided on one side of the push plate and is rotatably connected to the fourth connecting rod. The other end of the fourth connecting rod is rotatably connected to the upper end of the first connecting rod.

[0011] Description: The present invention provides a feeding assembly, a screw conveyor and a discharge pipe, so that the return material in the return box can enter the desulfurization tower for use. By providing a feeding assembly and a push plate and other components, the return material falling from the feed pipe into the shaking trough can be intermittently pushed into the cylinder, preventing a large amount of return material from falling into the cylinder and being squeezed and sticking into blocks, thereby affecting the material transportation effect of the screw conveyor. By providing a shaking mechanism and a moving mechanism, the push plate can add return material to the cylinder while using the movement of the shaking trough to shake the return material, making the return material looser and preventing it from sticking into blocks.

[0012] Furthermore, the output shaft of the second motor passes through the support rod and is connected to the middle portion of the first connecting rod.

[0013] Description: The output shaft of the second motor is connected to the middle part of the first connecting rod, so that the upper and lower ends of the first connecting rod move in opposite directions, so that the pushing movement of the push plate and the movement of the shaking groove are synchronized, thereby improving the operating efficiency of the device and reducing the number of motor settings.

[0014] Furthermore, the push plate fits against the inner wall of the shaking groove, and the length of the fourth connecting rod is shorter than that of the second connecting rod.

[0015] Description: The push plate fits against the inner wall of the shaking groove, so that all the returned materials in the shaking groove can be pushed into the feed pipe. The fourth connecting rod is connected to one end of the push plate, and the second connecting rod is connected to the moving mechanism. The moving mechanism is located below the slider, and the slider is located in the middle of the shaking groove. The length of the fourth connecting rod is shorter than that of the second connecting rod, which can further ensure the stability of the shaking mechanism.

[0016] Furthermore, a moving frame fixedly connected to the slider is provided on the outer side of the turntable, and the third connecting rod and the second connecting rod are both located on one side of the moving frame.

[0017] Note: By setting the moving frame, the turntable is prevented from sliding out from the bottom of the slider when rotating, thereby increasing the stability of the moving mechanism.

[0018] Furthermore, the bottom surface of the shaking groove is connected to the top surface of the slider through a spring rod, and one end of the shaking groove is located at the opening of the feed pipe.

[0019] Note: By setting the spring rod, the shaking effect of the shaking groove is increased, so that the returned materials can be looser and prevent the returned materials from sticking together.

[0020] Furthermore, a first baffle and a second baffle for blocking materials are provided at the bottom of the feed hopper, the second baffle is located on one side of the feed pipe, the first baffle is located above one side of the second baffle and is in sliding contact with the second baffle, the first baffle is fixedly connected to the feed hopper, and is used to cooperate with the first baffle to slide open or close the feed hopper, the second baffle is slidably connected to the bottom of the feed hopper, and the bottom surface of the second baffle is connected through a telescopic rod provided on the top surface of the push plate.

[0021] Description: By setting the second baffle, when the push plate moves to the left, the second baffle moves to the left with the push plate, opening the feed hopper, so that the return material falls into the shaking trough. When the push plate moves to the right, the feed hopper is closed synchronously, and the return material is added to the cylinder in a quantitative manner to prevent excessive return material from entering the cylinder, accumulating and sticking in the cylinder, and weakening the conveying effect of the screw conveyor.

[0022] Furthermore, the output shaft of the first motor is provided with a first gear ring slidably connected thereto, one end of the rotating shaft is provided with a gear meshing with the internal teeth of the first gear ring for transmission, a cylinder rotatably connected to the cylinder is provided on the barrel at one end of the rotating shaft, a second gear ring meshing with the external teeth of the first gear ring is provided on the cylinder located on one side of the gear, a sliding rod is provided on the rotating shaft outside the gear, and a groove is provided on the cylinder for moving the sliding rod left and right;

[0023] The other end of the rotating shaft is rotatably connected to the cylinder through a sleeve. A spring is provided in the sleeve. One end of the spring is connected to the cylinder, and the other end of the spring is connected to the sleeve.

[0024] Description: By setting a movable first gear ring, the screw conveyor can switch states. When the first gear ring is engaged with the gear, the screw conveyor can transport the return material in the cylinder to the discharge pipe. When the first gear ring is engaged with the second gear ring, it drives the screw conveyor to move left and right in the cylinder, and the return material stuck on the inner wall of the cylinder is dropped.

[0025] Furthermore, a convex block is provided on the inner wall of the upper side of the movable frame, and a round ball corresponding to the convex block is provided on the outer side of the turntable.

[0026] Description: When the ball on the turntable contacts the convex block, the moving frame is pushed up. When the ball is no longer in contact with the convex block, the moving frame drives the shaking trough to fall quickly, causing the shaking trough to shake the returned material.

[0027] The present invention also provides a process for performing spiral material return using a spiral material return device, comprising the following steps:

[0028] S1, shaking and adding materials:

[0029] When the second motor is started to rotate forward, the second motor drives the first connecting rod to rotate, the upper end of the first connecting rod drives the fourth connecting rod to rotate to the right, the lower end of the first connecting rod drives the second connecting rod to move to the left, the fourth connecting rod drives the push plate to move to the right, the push plate pushes the return material in the shaking groove into the feed pipe, the second connecting rod drives the third connecting rod to rotate around the rotating shaft, the turntable on the rotating shaft causes the slider to move downward in the slide groove, the slider drives the shaking groove to move downward, causing the return material in the shaking groove to shake, when the second motor is reversed, it drives the push plate to move to the left, and the slider drives the shaking groove to move up and down; repeat the above operation;

[0030] S2. Feeding:

[0031] Start the first motor, the first motor drives the rotating shaft to rotate, the return material enters the cylinder from the feed pipe, the screw conveyor drives the return material to move to the discharge pipe, and the return material enters the desulfurization tower from the discharge pipe.

[0032] The beneficial effects of the present invention are:

[0033] (1) The present invention provides a feed assembly, a screw conveyor and a discharge pipe, so that the return material in the return box can enter the desulfurization tower for use. By providing a feed assembly and a push plate and other components, the return material falling from the feed pipe into the shaking trough can be intermittently pushed into the cylinder, preventing a large amount of return material from falling into the cylinder and being squeezed and sticking into blocks, thereby affecting the material transportation effect of the screw conveyor. By providing a shaking mechanism and a moving mechanism, the push plate can add return material to the cylinder while using the movement of the shaking trough to shake the return material, making the return material looser and preventing it from sticking into blocks.

[0034] (2) The present invention provides a movable first gear ring so that the screw conveyor can switch states. When the first gear ring is engaged with the gear, the screw conveyor can convey the return material from the cylinder to the discharge pipe. When the first gear ring is engaged with the second gear ring, the screw conveyor is driven to move left and right in the cylinder, and the return material stuck on the inner wall of the cylinder is dropped.

[0035] (3) The spiral return material process designed in the present invention allows the return material to be shaken and quantitatively processed by the feeding assembly before entering the cylinder for transportation, so that the return material falling into the cylinder is looser and less likely to clump, thereby improving the return material effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is an appearance diagram of the spiral material return device of the present invention;

[0037] Figure 2 Schematic diagram of the internal structure of the spiral return device of the present invention;

[0038] Figure 3 It is a schematic diagram of the internal structure of the screw conveyor of the present invention;

[0039] Figure 4 Schematic diagram of the internal structure of the feed assembly of the present invention;

[0040] Figure 5 It is a structural schematic diagram of the shaking mechanism of the present invention;

[0041] Figure 6 It is a structural schematic diagram of the mobile mechanism of the present invention;

[0042] Figure 7 Schematic diagram of the positional relationship between the second connecting rod and the movable frame of the present invention;

[0043] Figure 8 is a top view of the cylinder of the present invention;

[0044] Figure 9 Schematic diagram of the internal structure of the cylinder of the present invention;

[0045] Figure 10 This is an appearance diagram of the spiral return device of Example 2 of the present invention;

[0046] Figure 11 This is a schematic diagram of the internal structure of the spiral return device in Example 2 of the present invention;

[0047] Figure 12 2 is a cross-sectional view of a spiral material return device according to embodiment 2 of the present invention;

[0048] Figure 13 This invention Figure 12 Front view of

[0049] Figure 14 This invention Figure 12 A magnified view of point A;

[0050] Figure 15 This invention Figure 13 Enlarged view of point B;

[0051] Figure 16 is a schematic diagram of the first baffle and the second baffle of the present invention;

[0052] Figure 17 Schematic diagram of the positional relationship between the second baffle and the push plate of the present invention;

[0053] Figure 18 Schematic diagram of the positional relationship between the spring and the slider of the present invention;

[0054] Among them, 1- cylinder, 11- screw conveyor, 111- rotating shaft, 12- first motor, 13- first gear ring, 14- gear, 15- cylinder, 151- second gear ring, 152- groove, 16- slide rod, 17- sleeve, 171- spring, 2- feed assembly, 21- feed hopper, 211- first baffle, 212- second baffle, 22- feed pipe, 23- shaking mechanism, 231- shaking Moving groove, 232-bracket, 233-first connecting rod, 234-second connecting rod, 235-slider, 236-slide groove, 237-support rod, 238-second motor, 239-spring rod, 24-moving mechanism, 241-turntable, 242-third connecting rod, 243-rotating shaft, 244-moving frame, 25-push plate, 251-fourth connecting rod, 252-telescopic rod, 26-protective shell, 3-discharging pipe. DETAILED DESCRIPTION

[0055] The present invention will be further described in detail below in conjunction with specific implementation methods to better demonstrate the advantages of the present invention.

[0056] Example 1

[0057] like Figure 1 As shown, a spiral return device and spiral return process for a semi-dry desulfurization process include a horizontally placed cylinder 1, a feed assembly 2, and a discharge pipe 3. The upper portion of the cylinder 1 is connected to a return box filled with return material through the feed assembly 2, and the lower portion of the cylinder 1 is connected to a desulfurization tower through the discharge pipe 3. The discharge pipe 3 is located on the left side of the feed assembly 2.

[0058] like Figure 2 As shown, a screw conveyor 11 is provided in the barrel 1 between the feed assembly 2 and the discharge pipe 3. One end of the rotating shaft 111 of the screw conveyor 11 passes through the barrel 1 and is rotatably connected thereto. A first motor 12 for driving the rotating shaft 111 to rotate is provided at one end of the barrel 1.

[0059] like Figure 3 、 4 As shown, the feeding assembly 2 includes a feeding hopper 21, a feeding pipe 22, a shaking mechanism 23 and a protective shell 26. The feeding pipe 22 and the shaking mechanism 23 are arranged in the protective shell 26. The feeding hopper 21 is located above the shaking mechanism 23. The lower end of the feeding hopper 21 passes through the protective shell 26 and is fixedly connected thereto. The feeding pipe 22 is located below the shaking mechanism 23. The side wall of the feeding pipe 22 is fixedly connected to the inner wall of the protective shell 26.

[0060] like Figure 5 、 6 As shown, the shaking mechanism 23 includes a shaking groove 231 arranged in the horizontal direction, a bracket 232, a first connecting rod 233 arranged in the vertical direction, and a second connecting rod 234 arranged in the horizontal direction. The bottom of the shaking groove 231 is provided with a slider 235 perpendicular to it, the upper end of the bracket 232 is provided with a sliding groove 236 for the slider 235 to pass through and be slidably connected to the slider 235, the lower end of the bracket 232 is fixedly connected to the cylinder 1, the first connecting rod 233 is located on the right side of the shaking groove 231, and a support rod 237 for supporting the first connecting rod 233 is provided on the side of the sliding groove 236. The support rod 237 is provided with a second motor 238 for driving the first connecting rod 233 to rotate, and the right end of the second connecting rod 234 is rotatably connected to the lower end of the first connecting rod 233; the left end of the shaking groove 231 is located at the opening of the feeding pipe 22;

[0061] like Figure 4 、 7 As shown, a moving mechanism 24 in contact with the slider 235 is provided on the bracket 232 located below the slide groove 236. The moving mechanism 24 includes a turntable 241 and a third connecting rod 242 arranged in the vertical direction. A rotating shaft 243 is provided at a position away from the center of the turntable 241. The left end of the rotating shaft 243 passes through the turntable 241 and is rotatably connected to the bracket 232. The right end of the rotating shaft 243 is fixedly connected to the left end of the third connecting rod 242. The right end of the third connecting rod 242 is rotatably connected to the second connecting rod 234.

[0062] like Figure 6 As shown, a push plate 25 is provided in the shaking groove 231 for pushing the returned material into the feeding tube 22. The push plate 25 is slidably connected to the shaking groove 231. A fourth connecting rod 251 is provided on the right side of the push plate 25 for rotation therewith. The left end of the fourth connecting rod 251 is rotatably connected to the upper end of the first connecting rod 233.

[0063] The push plate 25 is in contact with the inner wall of the shaking groove 231 , and the length of the second connecting rod 234 is three times that of the fourth connecting rod 251 ;

[0064] like Figure 5As shown, the output shaft of the second motor 238 passes through the support rod 237 and is connected to the middle portion of the first connecting rod 233;

[0065] like Figure 7 As shown, a moving frame 244 fixedly connected to the slider 235 is provided on the outside of the rotating disk 241, and the third connecting rod 242 and the second connecting rod 234 are both located on the right side of the moving frame 244;

[0066] The upper inner wall of the movable frame 244 is provided with a protrusion, and the outer side of the rotating disk 241 is provided with a ball corresponding to the protrusion;

[0067] The first motor 12 and the second motor 238 are commercially available rotary motors or are adjusted in shape based on commercially available rotary motors to fit into the device;

[0068] The spiral return process of the spiral return device comprises the following steps:

[0069] S1, shaking and adding materials:

[0070] The returned material enters the feed hopper 21 from the return box and then falls into the shaking groove 231. When the second motor 238 is started to rotate forward, the second motor 238 drives the first connecting rod 233 to rotate. The upper end of the first connecting rod 233 drives the fourth connecting rod 251 to rotate right. The lower end of the first connecting rod 233 drives the second connecting rod 234 to move left. The fourth connecting rod 251 drives the push plate 25 to move left. The push plate 25 pushes the returned material in the shaking groove 231 into the feed pipe 22. The second connecting rod 234 drives the third connecting rod 242 to rotate around the rotating shaft 243. The turntable 241 on the shaft 243 rotates, and the turntable 241 causes the slider 235 to move downward in the slide groove 236 by relying on the gravity of the shaking groove 231 and other components. The shaking groove 231 moves downward, and the turntable 241 continues to rotate. The ball contacts the protrusion and pushes up the shaking groove 231. The ball does not contact the protrusion, and the shaking groove 231 falls quickly, causing the returned material in the shaking groove 231 to shake. When the second motor 238 reverses, it drives the push plate 25 to move right, and the slider 235 drives the shaking groove 231 to move up and down. Repeat the above operation;

[0071] S2. Feeding:

[0072] Start the first motor 12, the first motor 12 drives the rotating shaft 111 to rotate, the return material enters the cylinder 1 from the feed pipe 22, the screw conveyor 11 drives the return material to move to the discharge pipe 3, and the return material enters the desulfurization tower from the discharge pipe 3.

[0073] Example 2

[0074] This embodiment is different from embodiment 1 in that Figure 10 、 14As shown in Figures 1 and 15, the output shaft of the first motor 12 is provided with a first gear ring 13 slidably connected thereto, the right end of the rotating shaft 111 is provided with a gear 14 meshing with the internal teeth of the first gear ring 13, the cylinder 1 located at the right end of the rotating shaft 111 is provided with a cylinder 15 rotatably connected to the cylinder 1, the cylinder 15 located on the right side of the gear 14 is provided with a second gear ring 151 meshing with the external teeth of the first gear ring 13, and the rotating shaft 111 located outside the gear 14 is provided with a slide bar 16, as shown in Figures 1 and 15. Figure 8 、 9 As shown, the cylindrical body 15 is provided with a groove 152 for moving the slide bar 16 left and right;

[0075] like Figure 11 、 12 As shown in 13, the left end of the rotating shaft 111 is rotatably connected to the cylinder 1 through the sleeve 17. A spring 171 is provided in the sleeve 17. The left end of the spring 171 is connected to the cylinder 1, and the right end of the spring 171 is connected to the sleeve 17.

[0076] The operation method of the above device is as follows:

[0077] When feeding, start the first motor 12 to rotate, the first gear ring 13 on the output shaft of the first motor 12 meshes with the gear 14 for transmission, driving the screw conveyor 11 to send the returned material to the discharge pipe 3. When the returned material on the inner wall of the cylinder 1 is cleaned, the first motor 12 stops rotating, moves the first gear ring 13 to mesh with the second gear ring 151, starts the first motor 12 to rotate, the first gear ring 13 drives the second gear ring 151 to rotate, and the second gear ring 151 drives the cylinder 15 to rotate around the axis. When the cylinder 15 rotates, the slide rod 16 contacts the groove 152, and the wavy circular ring block provided in the groove 152. When the slide rod 16 contacts the convexity of the wavy circular ring block, the screw conveyor 11 is driven to move left, compressing the spring 171. When the slide rod 16 does not contact the convexity of the wavy circular ring block, the spring 171 rebounds and pushes the screw conveyor 11 to move right. Repeat the above movement until the inner wall of the cylinder 1 is clean.

[0078] Example 3

[0079] This embodiment is basically the same as embodiment 1, except that Figure 16 、 17 As shown, the bottom of the feed hopper 21 is provided with a first baffle 211 and a second baffle 212 for blocking the material. The second baffle 212 is located on one side of the feed pipe 22. The first baffle 211 is located above the right side of the second baffle 212 and is in sliding contact with the second baffle 212. The first baffle 211 is fixedly connected to the feed hopper 21 and is used to cooperate with the first baffle 211 to slide open or close the feed hopper 21. The second baffle 212 is slidably connected to the bottom of the feed hopper 21.

[0080] like Figure 18 As shown, the bottom surface of the second baffle 212 is connected via a telescopic rod 252 provided on the top surface of the push plate 25; the bottom surface of the shaking groove 231 is connected via a spring rod 239 provided on the top surface of the slider 235.

[0081] The operation method of the above device is as follows:

[0082] During shaking and adding, the return material in the feed hopper 21 is blocked by the first baffle 211 and the second baffle 212, and the second motor 238 rotates in reverse, driving the push plate 25 to move rightward, and the push plate 25 drives the second baffle 212 to move rightward, and the return material in the feed hopper 21 falls into the shaking groove 231, the telescopic rod 252 extends, the second motor 238 rotates forward, and the push plate 25 drives the second baffle 212 to move leftward, closing the opening of the feed hopper 21, and the push plate 25 pushes the return material in the shaking groove 231 into the feed pipe 22, and the above operation is repeated to intermittently and quantitatively add the return material into the cylinder 1;

[0083] When the second motor 238 rotates forward and reverse, the shaking groove 231 moves downward, driving the returned material in the shaking groove 231 to shake, and at the same time cooperates with the spring rod 239 to improve the shaking effect of the shaking groove 231, making the returned material looser.

Claims

1. A spiral return device for semi-dry desulfurization process, characterized in that: It comprises a horizontally placed cylinder (1), a feed assembly (2) and a discharge pipe (3), wherein the upper portion of the cylinder (1) is connected to a return box filled with return materials through the feed assembly (2), and the lower portion of the cylinder (1) is connected to a desulfurization tower through the discharge pipe (3), and the discharge pipe (3) is located on one side of the feed assembly (2); A screw conveyor (11) is provided in the barrel (1) between the feed assembly (2) and the discharge pipe (3); one end of a rotating shaft (111) of the screw conveyor (11) passes through the barrel (1) and is rotatably connected thereto; and a first motor (12) for driving the rotating shaft (111) to rotate is provided at one end of the barrel (1); The feeding assembly (2) includes a feeding hopper (21), a feeding pipe (22), a shaking mechanism (23) and a protective shell (26); the feeding pipe (22) and the shaking mechanism (23) are arranged in the protective shell (26); the feeding hopper (21) is located above the shaking mechanism (23); the lower end of the feeding hopper (21) passes through the protective shell (26) and is fixedly connected thereto; the feeding pipe (22) is located below the shaking mechanism (23); the side wall of the feeding pipe (22) is fixedly connected to the inner wall of the protective shell (26); The shaking mechanism (23) includes a shaking groove (231) arranged in the horizontal direction, a bracket (232), a first connecting rod (233) arranged in the vertical direction, and a second connecting rod (234) arranged in the horizontal direction. The bottom of the shaking groove (231) is provided with a slider (235) perpendicular to the shaking groove. The upper end of the bracket (232) is provided with a sliding groove (236) for the slider (235) to pass through and is slidably connected to the slider (235). The lower end of the bracket (232) is fixedly connected to the cylinder (1). The first connecting rod (233) is located on one side of the shaking groove (231). A support rod (237) for supporting the first connecting rod (233) is provided on the side of the sliding groove (236). A second motor (238) for driving the first connecting rod (233) to rotate is provided on the support rod (237). One end of the second connecting rod (234) is rotatably connected to the lower end of the first connecting rod (233). A moving mechanism (24) in contact with the slider (235) is provided on the bracket (232) located below the slide groove (236), and the moving mechanism (24) includes a turntable (241) and a third connecting rod (242) arranged in a vertical direction. A rotating shaft (243) is provided at a position away from the center of the turntable (241). One end of the rotating shaft (243) passes through the turntable (241) and is rotatably connected to the bracket (232). The other end of the rotating shaft (243) is fixedly connected to one end of the third connecting rod (242). The other end of the third connecting rod (242) is rotatably connected to the second connecting rod (234). A push plate (25) is provided in the shaking groove (231) for pushing the returned material into the feeding tube (22). The push plate (25) is slidably connected to the shaking groove (231). A fourth connecting rod (251) is provided on one side of the push plate (25) and is rotatably connected to the push plate (25). The other end of the fourth connecting rod (251) is rotatably connected to the upper end of the first connecting rod (233). The output shaft of the second motor (238) passes through the support rod (237) and is connected to the middle portion of the first connecting rod (233); The push plate (25) is in contact with the inner wall of the shaking groove (231), and the length of the fourth connecting rod (251) is shorter than the length of the second connecting rod (234); A moving frame (244) fixedly connected to the slider (235) is provided on the outside of the rotating disk (241), and the third connecting rod (242) and the second connecting rod (234) are both located on one side of the moving frame (244); The bottom surface of the shaking groove (231) is connected to the top surface of the slider (235) via a spring rod (239), and one end of the shaking groove (231) is located at the opening of the feed pipe (22); The bottom of the feed hopper (21) is provided with a first baffle (211) and a second baffle (212) for blocking the material, the second baffle (212) is located on one side of the feed pipe (22), the first baffle (211) is located above one side of the second baffle (212) and is in sliding contact with the second baffle (212), the first baffle (211) is fixedly connected to the feed hopper (21), the second baffle (212) is slidably connected to the bottom of the feed hopper (21) and is used to cooperate with the first baffle (211) to slide open or close the feed hopper (21), and the bottom surface of the second baffle (212) is connected via a telescopic rod (252) provided on the top surface of the push plate (25); The output shaft of the first motor (12) is provided with a first gear ring (13) slidably connected thereto, one end of the rotating shaft (111) is provided with a gear (14) meshing with the internal teeth of the first gear ring (13), a cylinder (15) rotatably connected to the cylinder (1) is provided on the barrel (1) at one end of the rotating shaft (111), a second gear ring (151) meshing with the external teeth of the first gear ring (13) is provided on the cylinder (15) on one side of the gear (14), a sliding rod (16) is provided on the rotating shaft (111) outside the gear (14), and a groove (152) for moving the sliding rod (16) left and right is provided on the cylinder (15); The other end of the rotating shaft (111) is rotatably connected to the cylinder (1) through a sleeve (17), a spring (171) is provided in the sleeve (17), one end of the spring (171) is connected to the cylinder (1), and the other end of the spring (171) is connected to the sleeve (17); A convex block is provided on the inner wall of the upper side of the movable frame (244), and a round ball corresponding to the convex block is provided on the outer side of the rotating disk (241).

2. The spiral return process of the spiral return device for the semi-dry desulfurization process according to claim 1, characterized in that: The following steps are involved: S1, shaking and adding materials: When the second motor (238) is started to rotate forward, the second motor (238) drives the first connecting rod (233) to rotate, the upper end of the first connecting rod (233) drives the fourth connecting rod (251) to rotate rightward, the lower end of the first connecting rod (233) drives the second connecting rod (234) to move leftward, the fourth connecting rod (251) drives the push plate (25) to move rightward, the push plate (25) pushes the return material in the shaking groove (231) into the feeding pipe (22), and the second connecting rod (234) drives The third connecting rod (242) rotates around the rotating shaft (243), and the rotating disk (241) on the rotating shaft (243) causes the slider (235) to move downward in the sliding groove (236). The slider (235) drives the shaking groove (231) to move downward, causing the returned material in the shaking groove (231) to shake. When the second motor (238) reverses, it drives the push plate (25) to move left, and the slider (235) drives the shaking groove (231) to move up and down. Repeat the above operation; S2. Feeding: The first motor (12) is started, and the first motor (12) drives the rotating shaft (111) to rotate, and the return material enters the barrel (1) from the feed pipe (22), and the screw conveyor (11) drives the return material to move to the discharge pipe (3), and the return material enters the desulfurization tower from the discharge pipe (3).

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