A diversion device with anti-backflow function

Abstract

The present invention provides a diverter device with a backflow prevention function, which relates to the field of desulfurization towers and includes: a diverter air distributor, two of which are located in the lower inner portion of the desulfurization tower body and fixedly connected to the air inlet duct; an airflow regulation assembly, which is arranged inside the air inlet valve body, the air inlet duct, and the diverter air distributor; diverter pipes, which are arranged circumferentially on the outer side of the diverter air distributor, with each diverter air distributor having eight diverter pipes arranged in an array on the outer side of the diverter air distributor; air outlet nozzles, which are evenly arranged and fixedly connected to the bottom of the diverter pipes; and an anti-backflow assembly, which is arranged at the bottom of the air outlet nozzles. The anti-backflow assembly ensures uniform airflow distribution within the desulfurization tower, improves desulfurization reaction efficiency, and can effectively control the number and degree of opening of the diverter pipes to adapt to different operating conditions. This solves the problem of uneven nozzle air output under low-load conditions, which in turn affects desulfurization efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of desulfurization towers, and in particular to a diversion device with a backflow prevention function. Background Art

[0002] In the industrial desulfurization process, the diversion device is the core component connecting the air intake pipe and the desulfurization tower. Its performance directly affects the desulfurization efficiency and system stability. Traditional desulfurization diversion devices mostly adopt a flat plate structure, on which gas nozzles are evenly distributed. Physical partitions are set inside the plate to divert the airflow to the gas nozzles through the physical partitions. The airflow is evenly distributed through the outflow of multiple gas nozzles. When in use, after the gas to be purified enters the diversion distributor from the air intake pipe, it is physically separated into various branches through the diversion pipe and finally sprayed into the desulfurization tower from the outlet nozzle. In order to ensure the stability of the desulfurization operation, an anti-backflow function is also set in the outlet nozzle. The existing anti-backflow function generally relies on a spring-loaded check valve, which opens the valve disc under pressure and closes it when it loses pressure to prevent gas backflow.

[0003] However, in actual application, due to the difference in path length between the air inlet pipe and each nozzle of the flat-plate diversion structure, the gas tends to flow to the nozzles that are close to the air inlet and have less resistance, resulting in uneven distribution of airflow in the desulfurization tower. Although some companies now adjust the nozzle arrangement density, reduce the number of nozzles in the area close to the air inlet main pipe, increase the nozzle density in the area far from the main pipe, balance the gas flow, or optimize the nozzle outlet size, and adopt a gradual aperture design to make the nozzle outlet close to the main pipe smaller and the nozzle outlet far from the main pipe larger, so as to adjust the air output of each nozzle, these optimizations can only be effective within a certain working load range. However, under low load conditions, the air intake volume is reduced, and the air output of the nozzle far from the air inlet is significantly reduced. Uneven nozzle output and even airflow stagnation will still occur, making it impossible for the desulfurizer to fully contact the gas, thereby affecting the desulfurization efficiency. Summary of the Invention

[0004] In light of this, the present invention provides a diverter device with a backflow prevention function. This device utilizes staggered diverter air distributors and Y-shaped diamond-shaped diverter pipes to prevent airflow overlap between the upper and lower diverter pipes. A V-shaped flow guide structure at the bottom reduces airflow resistance and enhances fluidity, ensuring uniform airflow distribution within the desulfurization tower and improving desulfurization reaction efficiency. Furthermore, the coordinated operation of transmission mechanisms such as the valve handle, worm gear, rack and pinion, and bevel gears effectively controls the number and degree of diverter pipe openings, adapting to varying operating conditions and preventing some outlets from not releasing air when the air intake is low. Furthermore, the anti-backflow baffle and anti-backflow counterweights work together to prevent backflow by relying on gravity to close the outlets. This simple and reliable structure ensures the safe and stable operation of the desulfurization system.

[0005] The present invention provides a purpose and effect of a diverter device with a backflow prevention function, specifically comprising: a desulfurization tower body;

[0006] An air intake pipe, which is fixedly connected to the lower part of the desulfurization tower body;

[0007] An air intake valve body, the air intake valve body being fixedly connected to the air intake pipe;

[0008] The valve handle is rotatably connected to the top of the intake valve body;

[0009] There are two split air distributors, which are located at the lower inner part of the desulfurization tower body and are fixedly connected to the air inlet pipe.

[0010] An airflow regulating component is arranged inside the air intake valve body, the air intake pipe, and the splitter air distributor;

[0011] Diverter pipes are arranged circumferentially on the outside of the diverter air distributor, and eight diverter pipes are arranged in an array on the outside of each diverter air distributor;

[0012] The air outlet nozzles are evenly arranged and fixedly connected to the bottom of the diversion pipe;

[0013] The anti-backflow component is arranged at the bottom of the air outlet nozzle.

[0014] Furthermore, the diversion pipes on the upper and lower diversion air distributors are installed in a staggered manner.

[0015] Furthermore, the diverter tube is a Y-shaped structure, the cross section of the diverter tube is a diamond-shaped structure, and one corner of the diamond is facing downward.

[0016] Furthermore, the anti-backflow component includes:

[0017] The anti-backflow baffle cover is hingedly connected to the bottom of the air outlet nozzle. A mounting rod is provided on the other side of the hinge of the anti-backflow baffle cover, and an anti-backflow counterweight is threadedly installed on the mounting rod.

[0018] Furthermore, the airflow adjustment component includes:

[0019] The opening and closing worm is coaxially fixed to the rear of the valve handle;

[0020] The opening and closing worm wheel is rotatably connected to the upper inner side of the intake valve body, and the opening and closing worm and the opening and closing worm wheel are engaged with each other to form a worm gear transmission mechanism.

[0021] Furthermore, the airflow adjustment component also includes:

[0022] The driving gear is coaxially fixedly connected to the left end face of the opening and closing worm gear;

[0023] An intermediate transmission member, the intermediate transmission member being rotatably connected to the interior of the intake valve body;

[0024] The driven ring gear is fixedly connected to the outside of the intermediate transmission member, and the driving gear and the driven ring gear are meshed to form a gear transmission mechanism.

[0025] Furthermore, the airflow adjustment component also includes:

[0026] Upper and lower racks are fixedly connected to the upper and lower sides of the right end surface of the intermediate transmission member;

[0027] Front and rear racks are fixedly connected to the front and rear sides of the right end of the intermediate transmission member;

[0028] There are four switch valve plates in total. The four switch valve plates are rotatably connected to the inner side of the intake valve body in a circular array. The rotation axes of the four switch valve plates are respectively located on the horizontal and vertical diameters of the intake valve body;

[0029] The valve plate gear is coaxially fixed to the outside of the switch valve plate. The valve plate gears on the upper and lower sides are engaged with the upper and lower racks to form a gear rack transmission structure. The valve plate gears on the front and rear sides are engaged with the front and rear racks to form a gear rack transmission structure.

[0030] Furthermore, the rack lengths of the front and rear racks and the upper and lower racks are equal, and the distances between the front and rear racks and the nearest valve plate gear are different from the distances between the upper and lower racks and the nearest valve plate gear.

[0031] Furthermore, the airflow adjustment component also includes:

[0032] The driving bevel gear is coaxially fixedly connected to the left end surface of the intermediate transmission member through a connecting shaft;

[0033] There are two diverter baffle wheels, which are rotatably connected to the inside of the two diverter air distributors respectively, and the two diverter baffle wheels are coaxially fixedly connected;

[0034] The driven bevel gear is coaxially fixedly connected to the top of the splitter wheel, and the driving bevel gear and the driven bevel gear are meshed to form a bevel gear transmission mechanism.

[0035] Furthermore, the airflow adjustment component also includes:

[0036] A diversion port, wherein the diversion air distributor and the diversion pipe are connected via the diversion port;

[0037] The upper opening is arranged on the outer circumference of the upper diverter baffle wheel, and the upper opening corresponds to the upper diverter port one by one, and the diverter baffle wheel blocks the diverter port;

[0038] The lower opening is arranged on the outer circumference of the diverter baffle wheel below, and the lower opening corresponds to the diverter port at the bottom one by one.

[0039] Furthermore, the lower opening and the width of the lower opening, as well as the relative position of the lower opening and the diversion port are all different. Beneficial effects

[0040] The present invention utilizes staggered split-flow air distributors and Y-shaped diamond-shaped split-flow pipes to prevent airflow overlap between the upper and lower split-flow pipes. A V-shaped flow guide structure at the bottom reduces airflow resistance and enhances fluidity, ensuring uniform airflow distribution within the desulfurization tower and improving desulfurization reaction efficiency. Furthermore, the coordinated operation of transmission mechanisms such as the valve handle, worm gear, rack and pinion, and bevel gears effectively controls the number and degree of split-flow pipe openings, adapting to varying operating conditions and preventing some outlets from not releasing air when the air intake is low. Furthermore, the combination of an anti-backflow baffle and an anti-backflow counterweight prevents backflow by relying on gravity to close the outlets. This simple and reliable structure ensures safe and stable operation of the desulfurization system.

[0041] In addition, the present invention avoids the overlap of the air flows out of the upper and lower diversion pipes by adopting a staggered installation of the diversion air distributor and a Y-shaped diamond diversion pipe design, thereby achieving uniform distribution of the air flow in the desulfurization tower. The V-shaped guide structure at the bottom of the diversion pipe can effectively guide the air flow upward, reduce the air flow resistance, enhance the air flow fluidity, make the gas more evenly distributed in the desulfurization tower, ensure full contact between the desulfurizer and the gas, and improve the uniformity and efficiency of the desulfurization reaction.

[0042] In addition, the present invention realizes the sequential opening and closing of the switch valve plate and the rotation of the diverter wheel by adopting the coordinated work of transmission mechanisms such as the valve handle, worm gear, gear rack and bevel gear, thereby flexibly controlling the opening number and opening degree of the diverter pipe. The opening position and width of the second opening are different from those of the first opening, so that the device can accurately adjust the number of diverter pipes involved in the air intake according to the actual air output demand, effectively avoiding the problem of some air outlet nozzles not exhausting when the air intake volume is small, greatly improving the adaptability and adjustment flexibility of the device to different working conditions.

[0043] In addition, the present invention adopts the combination of an anti-backflow cover and an anti-backflow counterweight to fit tightly with the outlet nozzle under the action of gravity to prevent gas backflow. When air flows through, the air flow can easily push open the anti-backflow cover to achieve normal gas outlet. The design structure is simple and reliable. Compared with the existing spring-type check valve, it reduces the use of springs and reduces the failure rate by 80%, greatly reducing maintenance costs and safety risks, and ensuring the stable operation of the desulfurization system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0045] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0046] In the attached figure:

[0047] Figure 1 It is a schematic diagram of the overall structure of a diversion device with anti-backflow function according to an embodiment of the present invention.

[0048] Figure 2 It is a schematic diagram of the bottom structure of a diversion device with anti-backflow function according to an embodiment of the present invention.

[0049] Figure 3 The invention is a diversion device with anti-backflow function. Figure 2 Schematic diagram of the locally enlarged structure at point B in the middle.

[0050] Figure 4 It is an isometric structural diagram of a diversion device with anti-backflow function according to an embodiment of the present invention.

[0051] Figure 5 The invention is a diversion device with anti-backflow function. Figure 4 Schematic diagram of the structure at point A in the middle.

[0052] Figure 6 It is a structural schematic diagram of a diversion gas distributor of a diversion device with anti-backflow function in an embodiment of the present invention.

[0053] Figure 7 It is a schematic diagram of the transmission structure of the switch valve plate of the diverter device with anti-backflow function in an embodiment of the present invention.

[0054] Figure 8 It is a schematic structural diagram of a diverter wheel of a diverter device with a backflow prevention function according to an embodiment of the present invention.

[0055] Figure 9 It is a schematic cross-sectional structural diagram of a diversion air distributor of a diversion device with a backflow prevention function according to an embodiment of the present invention.

[0056] Figure 10 It is a schematic cross-sectional structural diagram of a diverter air distributor and a diverter baffle wheel of a diverter device with anti-backflow function in an embodiment of the present invention.

[0057] Reference Signs List

[0058] 1. Desulfurization tower body; 2. Air intake pipe; 3. Valve handle; 301. Opening and closing worm; 4. Opening and closing worm wheel; 401. Driving gear; 5. Intermediate transmission part; 501. Upper and lower racks; 502. Front and rear racks; 503. Driven ring gear; 504. Driving bevel gear; 6. Switch valve plate; 601. Valve plate gear; 7. Diverter stopper; 701. Driven bevel gear; 702. Upper opening; 703. Lower opening; 8. Diverter air distributor; 801. Diverter pipe; 802. Air outlet nozzle; 803. Diverter port; 9. Anti-backflow cover; 901. Anti-backflow counterweight; 10. Inlet valve body. DETAILED DESCRIPTION

[0059] Example 1: Please refer to Figures 1 to 7 As shown:

[0060] The present invention provides a diversion device with a backflow prevention function, comprising a desulfurization tower body 1;

[0061] An air intake pipe 2 is fixedly connected to the lower part of the desulfurization tower body 1;

[0062] The intake valve body 10 is fixedly connected to the intake pipe 2;

[0063] The valve handle 3 is rotatably connected to the top of the intake valve body 10;

[0064] The split air distributor 8 is provided with two pieces in total. The two split air distributors 8 are located at the lower inner part of the desulfurization tower body 1. The split air distributors 8 are fixedly connected to the air inlet pipe 2;

[0065] The airflow regulating component is arranged inside the air intake valve body 10, the air intake pipe 2, and the split air distributor 8;

[0066] The diverter pipes 801 are arranged circumferentially on the outside of the diverter air distributor 8. Eight diverter pipes 801 are arranged in an array on the outside of each diverter air distributor 8.

[0067] The air outlet nozzles 802 are evenly arranged and fixedly connected to the bottom of the diversion pipe 801;

[0068] The anti-backflow component is arranged at the bottom of the air outlet nozzle 802.

[0069] The diversion pipes 801 on the upper and lower diversion gas distributors 8 are installed in a staggered manner. During use, the airflows flowing out of the upper and lower diversion pipes 801 are prevented from overlapping, thereby better improving the uniform distribution of the airflow and ensuring a more uniform desulfurization reaction.

[0070] Among them, the diverter pipe 801 is a Y-shaped structure, and the cross-section of the diverter pipe 801 is a diamond structure, and one corner of the diamond is facing downward. During use, the Y-shaped structure of the diverter pipe 801 can better realize a more uniform arrangement of the gas outlet nozzle 802 in the desulfurization tower body 1, thereby improving the airflow distribution effect. At the same time, after the airflow flows out from the gas outlet nozzle 802, the bottom two sides of the diverter pipe 801 are V-shaped structures, which can guide the rising airflow, increase or decrease the fluidity of the airflow, and realize the homogenization of the airflow, which is convenient for the subsequent desulfurization process. The diverter pipe 801 with a diamond structure has a good diversion effect while serving as a pipeline.

[0071] Among them, the anti-backflow components include:

[0072] The anti-backflow baffle 9 is hingedly connected to the bottom of the air outlet nozzle 802. A mounting rod is provided on the other side of the hinge of the anti-backflow baffle 9, and an anti-backflow counterweight 901 is threadedly installed on the mounting rod. During use, the anti-backflow baffle 9 is tightly attached to the bottom of the air outlet nozzle 802 under the action of gravity. When the air outlet nozzle 802 releases air, the airflow pushes the anti-backflow baffle 9 downward, pushing the anti-backflow baffle 9 open to realize the air outlet.

[0073] The airflow adjustment components include:

[0074] The opening and closing worm 301 is coaxially fixedly connected to the rear of the valve handle 3;

[0075] The opening and closing worm gear 4 is rotatably connected to the upper inner side of the intake valve body 10, and the opening and closing worm 301 is meshed with the opening and closing worm gear 4 to form a worm gear transmission mechanism. In use, when the valve handle 3 is rotated, the valve handle 3 drives the opening and closing worm gear 4 to rotate through the worm gear transmission mechanism composed of the opening and closing worm 301 and the opening and closing worm gear 4.

[0076] The airflow adjustment component also includes:

[0077] The driving gear 401 is coaxially fixedly connected to the left end surface of the opening and closing worm gear 4;

[0078] An intermediate transmission member 5 is rotatably connected to the interior of the intake valve body 10;

[0079] The driven ring gear 503 is fixedly connected to the outside of the intermediate transmission member 5. The driving gear 401 and the driven ring gear 503 are meshed with each other to form a gear transmission mechanism. In use, when the opening and closing worm gear 4 rotates, the opening and closing worm gear 4 drives the intermediate transmission member 5 to rotate through the gear transmission mechanism composed of the driving gear 401 and the driven ring gear 503.

[0080] The airflow adjustment component also includes:

[0081] Upper and lower racks 501 are fixedly connected to the upper and lower sides of the right end surface of the intermediate transmission member 5;

[0082] Front and rear racks 502 are fixedly connected to the front and rear sides of the right end of the intermediate transmission member 5;

[0083] The switch valve plates 6 are provided with four switch valve plates 6. The four switch valve plates 6 are rotatably connected to the inner side of the intake valve body 10 in a circular array. The rotation axes of the four switch valve plates 6 are respectively located on the horizontal and vertical diameters of the intake valve body 10;

[0084] The valve plate gear 601 is coaxially fixed to the outside of the switch valve plate 6. The valve plate gears 601 on the upper and lower sides are meshed with the upper and lower racks 501 to form a gear rack transmission structure. The valve plate gears 601 on the front and rear sides are meshed with the front and rear racks 502 to form a gear rack transmission structure. In use, when the intermediate transmission member 5 rotates, the intermediate transmission member 5 drives the switch valve plate 6 to rotate through the gear rack transmission structure to realize the opening and closing of the switch valve plate 6.

[0085] Among them, the rack lengths of the front and rear racks 502 and the upper and lower racks 501 are equal, and the distances between the front and rear racks 502 and the nearest valve plate gear 601 and the distances between the upper and lower racks 501 and the nearest valve plate gear 601 are not the same, which can be adjusted according to actual needs. For example, the distance between the front and rear racks 502 and the nearest valve plate gear 601 and the distance between the upper and lower racks 501 and the nearest valve plate gear 601 is one rack length away. When the intermediate transmission member 5 rotates, the intermediate transmission member 5 first drives the upper rear and lower front switch valve plates 6 to rotate through the gear rack transmission mechanism composed of the valve plate gear 601 and the upper and lower racks 501. When the valve plate gear 601 is disengaged from the upper and lower racks 501, the front and rear valve plate gears 601 engage with the front and rear racks 502, driving the upper front and lower rear switch valve plates 6 to rotate, thereby realizing the sequential opening and closing of the paired switch valve plates 6.

[0086] Example 2: The difference between Example 2 and Example 1 is that the distance between the front and rear racks 502 / upper and lower racks 501 and the nearest valve plate gear 601 is one rack length away respectively. When the intermediate transmission member 5 rotates, first the upper valve plate gear 601 engages with the upper and lower racks 501 to realize the rotation of the upper switch valve plate 6, and then the lower valve plate gear 601 engages with the upper and lower racks 501 to realize the rotation of the lower switch valve plate 6, and then the front valve plate gear 601 engages with the front and rear racks 502 to drive the front switch valve plate 6 to rotate, and finally the rear valve plate gear 601 engages with the front and rear racks 502 to drive the rear switch valve plate 6 to rotate, realizing the opening and closing of the four switch valve plates 6 in sequence.

[0087] Example 3: Please refer to Figures 8 to 10 As shown:

[0088] The present invention provides a diversion device with a backflow prevention function, and the airflow adjustment component also includes:

[0089] The driving bevel gear 504 is coaxially fixedly connected to the left end surface of the intermediate transmission member 5 through a connecting shaft;

[0090] The diverter baffle wheel 7 is provided with two pieces, and the two diverter baffle wheels 7 are rotatably connected to the inside of the two diverter air distributors 8, and the two diverter baffle wheels 7 are coaxially fixedly connected;

[0091] The driven bevel gear 701 is coaxially fixedly connected to the top of the diverter block wheel 7, and the driving bevel gear 504 is meshed with the driven bevel gear 701 to form a bevel gear transmission mechanism. In use, when the intermediate transmission member 5 rotates, the intermediate transmission member 5 drives the diverter block wheel 7 to rotate through the bevel gear transmission mechanism composed of the meshing of the driving bevel gear 504 and the driven bevel gear 701.

[0092] The airflow adjustment component also includes:

[0093] The diversion port 803 is connected between the diversion air distributor 8 and the diversion pipe 801 through the diversion port 803;

[0094] The upper opening 702 is arranged on the outer circumference of the upper diverter wheel 7. The upper opening 702 corresponds to the upper diverter port 803 one by one. The diverter wheel 7 blocks the diverter port 803.

[0095] The lower opening 703 is arranged on the outer surface of the diverter baffle wheel 7 below, and the lower opening 703 corresponds one-to-one with the lower diverter port 803. During use, when the diverter baffle wheel 7 rotates, the diverter port 803 is switched on and off by changing the overlapping relationship between the upper opening 702 / lower opening 703 and the diverter port 803.

[0096] Among them, the lower opening 703 and the opening width of the lower opening 703, and the relative position to the diversion port 803 can be adjusted accordingly according to actual conditions to achieve selective opening of the diversion tube 801 or adjustment of the opening of the diversion port 803 to meet different usage requirements. For example, the diversion tube 801 can be adjusted to be opened at intervals and fully opened, or a smaller opening of the diversion port 803 can be achieved to improve the adjustment capability.

[0097] The specific usage and function of this embodiment are as follows: when the desulfurization operation needs to be started, the valve handle 3 is rotated, and the valve handle 3 drives the opening and closing worm gear 4 to rotate through the worm gear transmission mechanism composed of the opening and closing worm 301 and the opening and closing worm gear 4, and the opening and closing worm gear 4 drives the intermediate transmission member 5 to rotate through the gear transmission mechanism composed of the driving gear 401 and the driven gear ring 503, and the intermediate transmission member 5 rotates the switch valve plate 6 in sequence through the gear rack transmission mechanism composed of the valve plate gear 601 and the upper and lower racks 501 / the front and rear racks 502, so that the switch valve plates 6 are opened in sequence; at the same time, the intermediate transmission member 5 is driven by the bevel gear composed of the meshing of the driving bevel gear 504 and the driven bevel gear 701. The transmission mechanism drives the diverter baffle wheel 7 to rotate, and the lower opening 703 is first connected with the lower diverter port 803, so that the lower diverter pipe 801 can discharge air. When the diverter baffle wheel 7 continues to rotate, the upper opening 702 is connected with the upper diverter port 803, and the lower opening 703 is still connected with the lower diverter port 803, so that both the upper and lower diverter pipes 801 can discharge air, thereby realizing the adjustment of the number of diverter air distributors 8 according to the gas outlet volume. At the same time, the positions of the upper opening 702 and the lower opening 703 can also be adjusted as needed, so as to realize the adjustment of the number of throttling diverter pipes 801 participating in the air intake as needed, with better adjustment capability, and effectively avoiding the situation where only the gas outlet nozzle closer to the main pipe can discharge air when the air intake volume is small.

[0098] During the desulfurization process, the gas to be purified enters the diverter gas distributor 8 from the air inlet pipe 2, and then passes through the diverter port 803 to enter the diverter pipe 801. The gas pushes the anti-backflow baffle 9 downward and flows out from the air outlet nozzle 802. After the air flow flows out from the air outlet nozzle 802, the bottom two sides of the diverter pipe 801 are V-shaped structures, which can guide the rising air flow, increase or decrease the fluidity of the air flow, and achieve air flow homogenization, which is convenient for the subsequent desulfurization process.

[0099] Example 4: The difference between Example 4 and Example 3 is that the opening width of the lower opening 703 is twice the opening width of the upper opening 702. During use, when the diverter wheel 7 rotates, the lower opening 703 is first connected with the lower diverter port 803, so that the lower diverter pipe 801 can discharge air. When the diverter wheel 7 continues to rotate, the upper opening 702 is connected with the upper diverter port 803, and the lower opening 703 is still connected with the lower diverter port 803, so that both the upper and lower diverter pipes 801 can discharge air, thereby realizing the adjustment of the number of diverter pipes 801 according to the gas outlet volume, and having better adjustment capability. It should be noted that the parameters of the lower opening 703 and the lower opening 703 need to be determined in a unified and coordinated manner with the positions of the upper and lower racks 501 and the front and rear racks 502.

Claims

1. A diversion device with anti-backflow function, characterized in that: include: Desulfurization tower body (1); An air intake pipe (2), the air intake pipe (2) being fixedly connected to the lower portion of the desulfurization tower body (1); An air intake valve body (10), the air intake valve body (10) being fixedly connected to the air intake pipe (2); A valve handle (3), the valve handle (3) being rotatably connected to the top of the intake valve body (10); A split air distributor (8), wherein two split air distributors (8) are provided, and the two split air distributors (8) are located at the lower inner portion of the desulfurization tower body (1), and the split air distributors (8) are fixedly connected to the air inlet pipe (2); An airflow regulating component, the airflow regulating component being arranged inside the air intake valve body (10), the air intake duct (2), and the flow distributor (8); Diverter pipes (801), the diverter pipes (801) are arranged circumferentially on the outside of the diverter air distributor (8), and the diverter pipes (801) are arranged in an array in a circumferential arrangement on the outside of each diverter air distributor (8); Air outlet nozzles (802), the air outlet nozzles (802) are evenly arranged and fixedly connected to the bottom of the diversion pipe (801); an anti-backflow component, the anti-backflow component being arranged at the bottom of the air outlet nozzle (802); The diversion pipes (801) on the upper and lower diversion air distributors (8) are installed in a staggered manner; The diverter pipe (801) is a Y-shaped structure, and the cross section of the diverter pipe (801) is a diamond-shaped structure, with one corner of the diamond facing downwards; The airflow adjustment component includes: An intermediate transmission member (5), the intermediate transmission member (5) being rotatably connected to the interior of the intake valve body (10); Upper and lower racks (501), the upper and lower racks (501) are fixedly connected to the upper and lower sides of the right end surface of the intermediate transmission member (5); Front and rear racks (502), the front and rear racks (502) are fixedly connected to the front and rear sides of the right end of the intermediate transmission member (5); The switch valve plates (6) are provided with four switch valve plates (6) in total. The four switch valve plates (6) are rotatably connected to the inner side of the intake valve body (10) in a circular array. The rotation axes of the four switch valve plates (6) are respectively located on the horizontal and vertical diameters of the intake valve body (10); The valve plate gear (601) is coaxially fixedly connected to the outer side of the switch valve plate (6), the valve plate gears (601) on the upper and lower sides mesh with the upper and lower racks (501) to form a gear rack transmission structure, and the valve plate gears (601) on the front and rear sides mesh with the front and rear racks (502) to form a gear rack transmission structure; The front and rear racks (502) and the upper and lower racks (501) have the same rack length, and the distances between the front and rear racks (502) and the nearest valve plate gear (601) are different from the distances between the upper and lower racks (501) and the nearest valve plate gear (601).

2. A diversion device with backflow prevention function as claimed in claim 1, characterized in that: The anti-backflow component includes: The anti-backflow baffle (9) is hingedly connected to the bottom of the air outlet nozzle (802), and a mounting rod is provided on the other side of the hinge of the anti-backflow baffle (9), and an anti-backflow counterweight (901) is threadedly mounted on the mounting rod.

3. A diversion device with backflow prevention function as claimed in claim 1, characterized in that: The airflow adjustment component also includes: An opening and closing worm (301), the opening and closing worm (301) is coaxially fixedly connected to the rear of the valve handle (3); An opening and closing worm wheel (4), the opening and closing worm wheel (4) is rotatably connected to the upper inner portion of the intake valve body (10), and the opening and closing worm (301) is meshed with the opening and closing worm wheel (4) to form a worm gear transmission mechanism; A driving gear (401), the driving gear (401) is coaxially fixedly connected to the left end surface of the opening and closing worm gear (4); The driven ring gear (503) is fixedly connected to the outside of the intermediate transmission member (5), and the driving gear (401) and the driven ring gear (503) are meshed to form a gear transmission mechanism.

4. A diversion device with backflow prevention function as claimed in claim 1, characterized in that: The airflow adjustment component also includes: A driving bevel gear (504), the driving bevel gear (504) is coaxially fixedly connected to the left end surface of the intermediate transmission member (5) via a connecting shaft; A diverter baffle wheel (7), wherein two diverter baffle wheels (7) are provided, and the two diverter baffle wheels (7) are rotatably connected to the inside of the two diverter air distributors (8), and the two diverter baffle wheels (7) are coaxially fixedly connected; The driven bevel gear (701) is coaxially fixedly connected to the top of the diverter block wheel (7), and the driving bevel gear (504) and the driven bevel gear (701) are meshed to form a bevel gear transmission mechanism.

5. A diversion device with backflow prevention function as claimed in claim 4, characterized in that: The airflow adjustment component also includes: A diversion port (803), wherein the diversion air distributor (8) and the diversion pipe (801) are connected via the diversion port (803); An upper opening (702) is arranged on the outer circumferential surface of the upper diversion blocking wheel (7), and the upper opening (702) corresponds to the upper diversion opening (803) one by one, and the diversion blocking wheel (7) blocks the diversion opening (803); The lower opening (703) is arranged on the outer circumferential surface of the diverter wheel (7) below, and the lower opening (703) corresponds to the diverter port (803) at the bottom one by one.

6. A diversion device with backflow prevention function as claimed in claim 5, characterized in that: The lower opening (703) and the opening width of the lower opening (703) and the relative position to the diversion opening (803) are all different.

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