Flow dividing device with countercurrent prevention function

Abstract

The invention provides a flow dividing device with an anti-reflux effect, and relates to the field of desulfurization towers, the flow dividing device comprises two flow dividing gas distributors, the two flow dividing gas distributors are located at the lower part of the inner side of a desulfurization tower main body, and the flow dividing gas distributors are fixedly connected with a gas inlet pipeline; the air flow adjusting assembly is arranged in the air inlet valve body, the air inlet pipeline and the flow dividing and air distributing device; the flow dividing pipes are circumferentially arranged on the outer sides of the flow dividing and gas distributing devices, and eight flow dividing pipes are arranged on the outer side of each flow dividing and gas distributing device in a circumferential array mode; the air outlet nozzles are uniformly distributed and fixedly connected to the bottom of the flow dividing pipe; and the anti-backflow assembly is arranged at the bottom of the air outlet nozzle. Air flow in the desulfurization tower is uniformly distributed, the desulfurization reaction efficiency is improved, the opening number and the opening degree of the shunt pipes can be well controlled, and the device adapts to different working conditions. The problem that the desulfurization efficiency is affected due to the fact that the gas output of the nozzle is not uniform under the low-load working condition is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of desulfurization towers, and particularly to a flow splitting device with an anti-backflow function. Background Art

[0002] In the industrial desulfurization process, as a core component connecting the intake pipe and the desulfurization tower, the performance of the flow splitting device directly affects the desulfurization efficiency and system stability. Most traditional desulfurization flow splitting devices adopt a flat plate structure, with gas nozzles evenly distributed on the flat plate, and physical partitions are arranged inside the flat plate. The air flow is split into the gas nozzles through the physical partitions, and the uniform distribution of the air flow is achieved through the outflow of multiple gas nozzles. During use, the gas to be purified enters the flow splitting air distributor from the intake pipe, is physically split into each branch through the flow splitting pipe, and finally is sprayed into the desulfurization tower from the air outlet nozzle; in order to ensure the stability of the desulfurization work, an anti-backflow function is also set inside the air outlet nozzle. The existing anti-backflow function generally relies on a spring-type check valve, and the valve flap is opened under pressure and closed under loss of pressure to prevent gas from flowing back.

[0003] However, in the actual application process, due to the difference in the path length between the intake pipe and each nozzle in the flat plate type flow splitting structure, the gas tends to flow to the nozzles that are close to the intake port and have small resistance, resulting in uneven distribution of the air flow in the desulfurization tower. Although some enterprises now adjust the nozzle arrangement density, reduce the number of nozzles in the area close to the intake main pipe, increase the nozzle density in the area far from the main pipe, balance the gas flow, or optimize the nozzle outlet size, adopt a gradually changing aperture design, 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. However, these optimizations only have good effects within a certain working load range. But when in a low-load working condition, the intake air volume decreases, and the air output of the nozzles far from the intake port decreases significantly, and there will still be an uneven air output of the nozzles, and even an air flow stagnation phenomenon, which makes the desulfurization agent and the gas unable to fully contact, thereby affecting the desulfurization efficiency. Summary of the Invention

[0004] In view of this, the present invention provides a flow splitting device with an anti-backflow function, which adopts a flow splitting air distributor and a Y-shaped diamond-shaped flow splitting pipe installed in a staggered manner to avoid the overlap of the air flow of the upper and lower layer flow splitting pipes. Its bottom V-shaped guiding structure reduces the air flow resistance and enhances the fluidity, making the air flow in the desulfurization tower evenly distributed and improving the desulfurization reaction efficiency. At the same time, by using transmission mechanisms such as valve handles, worm gears, racks, and bevel gears to work together, the opening number and opening degree of the flow splitting pipe can be well controlled to adapt to different working conditions and avoid the situation that some air outlet nozzles do not emit gas when the intake air volume is small; in addition, through the cooperation of the anti-backflow baffle and the anti-backflow counterweight, relying on gravity to fit the air outlet nozzle to prevent backflow, the structure is simple and reliable, ensuring the safe and stable operation of the desulfurization system.

[0005] The present invention provides the purpose and efficacy of a flow splitting device with an anti-backflow function, specifically including: a desulfurization tower main body; An intake pipe, which is fixedly connected to the lower part of the desulfurization tower main body; An intake valve body, which is fixedly connected to the intake pipe; A valve handle, which is rotatably connected to the top of the intake valve body; Two flow splitting air distributors are provided. The two flow splitting air distributors are located at the lower inner side of the desulfurization tower main body, and the flow splitting air distributors are fixedly connected to the intake pipe; An air flow regulating component, which is arranged inside the intake valve body, the intake pipe, and the flow splitting air distributor; Flow splitting pipes are arranged circumferentially on the outside of the flow splitting air distributor. Eight flow splitting pipes are arranged in a circumferential array on the outside of each flow splitting air distributor; Outlet nozzles are evenly arranged and fixedly connected to the bottom of the flow splitting pipes; An anti-backflow component, which is arranged at the bottom of the outlet nozzle.

[0006] Further, the flow splitting pipes on the upper and lower flow splitting air distributors are installed in a staggered manner.

[0007] Further, the flow splitting pipe is of a Y-shaped structure, the cross-section of the flow splitting pipe is of a rhombus structure, and one angle of the rhombus faces downward.

[0008] Further, the anti-backflow component includes: An anti-backflow cover, which is hingedly connected to the bottom of the outlet nozzle. An installation rod is arranged on the other side of the hinge of the anti-backflow cover, and an anti-backflow counterweight is threadedly installed on the installation rod.

[0009] Further, the air flow regulating component includes: An opening and closing worm, which is coaxially and fixedly connected to the rear part of the valve handle; An opening and closing worm gear, which is rotatably connected to the upper inner side of the intake valve body. The opening and closing worm and the opening and closing worm gear are engaged to jointly form a worm and worm gear transmission mechanism.

[0010] Further, the air flow regulating component further includes: A driving gear, which is coaxially and fixedly connected to the left end face of the opening and closing worm gear; An intermediate transmission member, which is rotatably connected inside the intake valve body; A driven gear ring, which is fixedly connected to the outside of the intermediate transmission member. The driving gear and the driven gear ring are engaged to jointly form a gear transmission mechanism.

[0011] Further, the air flow regulating component further includes: Upper and lower racks, which are fixedly connected to the upper and lower sides of the right end face of the intermediate transmission member; Front and rear racks, which are fixedly connected to the front and rear sides of the right end face of the intermediate transmission member; Switch valve plates, there are four switch valve plates in total. The four switch valve plates are rotationally connected to the inner side of the intake valve body in a circumferential array. The rotating shafts of the four switch valve plates are respectively located on the diameters of the intake valve body in the horizontal and vertical directions; Valve plate gears, which are coaxially and fixedly connected to the outside of the switch valve plates. The valve plate gears on the upper and lower sides mesh with the upper and lower racks respectively to jointly form a rack and pinion transmission structure. The valve plate gears on the front and rear sides mesh with the front and rear racks respectively to jointly form a rack and pinion transmission structure.

[0012] 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 not the same as the distances between the upper and lower racks and the nearest valve plate gear.

[0013] Furthermore, the airflow regulating assembly further includes: A driving bevel gear, which is coaxially and fixedly connected to the left end face of the intermediate transmission member through a connecting shaft; Diverting retaining wheels, there are two diverting retaining wheels in total. The two diverting retaining wheels are respectively rotationally connected inside the two diverting air distributors, and the two diverting retaining wheels are coaxially and fixedly connected; A driven bevel gear, which is coaxially and fixedly connected to the top of the diverting retaining wheel. The driving bevel gear and the driven bevel gear mesh to jointly form a bevel gear transmission mechanism.

[0014] Furthermore, the airflow regulating assembly further includes: Diverting openings, the diverting air distributors and the diverting pipes are connected through the diverting openings; Upper openings, the outer circumferential surface of the upper diverting retaining wheel is arranged with upper openings, and the upper openings correspond to the upper diverting openings one by one. The diverting retaining wheel blocks the diverting openings; Lower openings, the outer circumferential surface of the lower diverting retaining wheel is arranged with lower openings, and the lower openings correspond to the lower diverting openings one by one.

[0015] Furthermore, the opening widths of the lower openings and the relative positions of the lower openings and the diverting openings are all different. Beneficial effects

[0016] The present invention adopts a staggered installation of the split air distributor and the Y-shaped diamond split pipe to avoid the overlap of the upper and lower split pipes. The bottom V-shaped flow guide structure reduces the air flow resistance and enhances the fluidity, so that the air flow in the desulfurization tower is evenly distributed, and the desulfurization reaction efficiency is improved. At the same time, the transmission mechanism such as the valve handle, worm gear, gear rack and bevel gear can work together to well control the number and opening of the split pipes, adapt to different working conditions, and avoid the situation where some air outlets do not emit air when the air intake is small; in addition, the anti-backflow cover and the anti-backflow counterweight are matched to rely on gravity to fit the air outlet to prevent backflow, and the structure is simple and reliable, ensuring the safe and stable operation of the desulfurization system.

[0017] In addition, the present invention avoids the overlap of the air flows out of the upper and lower diverter pipes by adopting a staggered diverter air distributor and a Y-shaped diamond diverter pipe design, thereby achieving uniform distribution of the air flow in the desulfurization tower. The V-shaped guide structure at the bottom of the diverter pipe can effectively guide the air flow to rise, reduce air flow resistance, enhance 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.

[0018] In addition, the present invention can realize the sequential opening and closing of the switch valve plate and the rotation of the diverter baffle wheel by adopting the coordinated work of transmission mechanisms such as the valve handle, worm gear, gear rack and bevel gear, so as to flexibly control the opening quantity 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 outlet demand, effectively avoiding the problem of some air outlet nozzles not exhausting when the air intake volume is small, which greatly improves the adaptability and adjustment flexibility of the device to different working conditions.

[0019] In addition, the present invention adopts the combination of an anti-backflow baffle cover and an anti-backflow counterweight to tightly fit the outlet nozzle under the action of gravity to prevent gas backflow. When air flows through, the air can easily push open the anti-backflow baffle cover to achieve normal gas outlet. The design structure is simple and reliable. Compared with the existing spring-type check valve, the use of springs is reduced, the failure rate is reduced by 80%, and the maintenance cost and safety risks are greatly reduced, thereby ensuring the stable operation of the desulfurization system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0021] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0022] In the attached picture: 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.

[0023] Figure 2 Schematic diagram of the bottom structure of the flow splitting device with anti-backflow function according to an embodiment of the present invention.

[0024] Figure 3 It is the Figure 2 Schematic diagram of the partial enlarged structure at position B in the flow splitting device with anti-backflow function according to an embodiment of the present invention.

[0025] Figure 4 Isometric structure schematic diagram of the flow splitting device with anti-backflow function according to an embodiment of the present invention.

[0026] Figure 5 It is the Figure 4 Schematic diagram of the structure at position A in the flow splitting device with anti-backflow function according to an embodiment of the present invention.

[0027] Figure 6 Schematic diagram of the flow distribution air distributor structure of the flow splitting device with anti-backflow function according to an embodiment of the present invention.

[0028] Figure 7 Schematic diagram of the drive structure of the switch valve plate of the flow splitting device with anti-backflow function according to an embodiment of the present invention.

[0029] Figure 8 Schematic diagram of the flow splitting retaining wheel structure of the flow splitting device with anti-backflow function according to an embodiment of the present invention.

[0030] Figure 9 Schematic diagram of the sectional view of the flow distribution air distributor of the flow splitting device with anti-backflow function according to an embodiment of the present invention.

[0031] Figure 10 Schematic diagram of the sectional view of the flow distribution air distributor and the flow splitting retaining wheel of the flow splitting device with anti-backflow function according to an embodiment of the present invention.

[0032] List of reference numerals 1, desulfurization tower main body; 2, intake pipeline; 3, valve handle; 301, opening and closing worm; 4, opening and closing worm gear; 401, driving gear; 5, intermediate transmission member; 501, upper and lower racks; 502, front and rear racks; 503, driven gear ring; 504, driving bevel gear; 6, switch valve plate; 601, valve plate gear; 7, flow splitting retaining wheel; 701, driven bevel gear; 702, upper opening; 703, lower opening; 8, flow distribution air distributor; 801, flow splitting pipe; 802, air outlet nozzle; 803, flow splitting port; 9, anti-backflow retaining cover; 901, anti-backflow counterweight; 10, intake valve body. Detailed implementation manners

[0033] Embodiment 1: Please refer to Figures 1 to 7 as shown: The present invention provides a shunt device with an anti-backflow function, including a desulfurization tower main body 1; An intake pipe 2, which is fixedly connected to the lower part of the desulfurization tower main body 1; An intake valve body 10, which is fixedly connected to the intake pipe 2; A valve handle 3, which is rotatably connected to the top of the intake valve body 10; Two shunt air distributors 8 are provided. The two shunt air distributors 8 are located at the inner lower part of the desulfurization tower main body 1, and the shunt air distributors 8 are fixedly connected to the intake pipe 2; An air flow regulating assembly, which is arranged inside the intake valve body 10, the intake pipe 2, and the shunt air distributor 8; Shunt pipes 801 are arranged in a circular array on the outside of the shunt air distributor 8. Eight shunt pipes 801 are arranged in a circumferential array on the outside of each shunt air distributor 8; Outlet nozzles 802 are uniformly arranged and fixedly connected to the bottom of the shunt pipes 801; An anti-backflow assembly is arranged at the bottom of the outlet nozzles 802.

[0034] Among them, the shunt pipes 801 on the upper and lower two shunt air distributors 8 are installed in a staggered manner. During use, it is possible to avoid the overlap of the air flows flowing out of the upper and lower layers of shunt pipes 801, better improve the air flow distribution effect, and ensure that the desulfurization reaction is more uniform.

[0035] Among them, the shunt pipe 801 is of a Y-shaped structure, and the cross-section of the shunt pipe 801 is of a rhombus structure, and one angle of the rhombus faces downward. During use, through the Y-shaped structure of the shunt pipe 801, it is possible to better achieve a more uniform arrangement of the outlet nozzles 802 in the desulfurization tower main body 1, improve the air flow distribution effect. At the same time, when the air flow flows out of the outlet nozzles 802, the two sides of the bottom of the shunt pipe 801 are in a V-shaped structure, which can guide the rising air flow, increase or decrease the fluidity of the air flow, realize the homogenization of the air flow, and facilitate the subsequent desulfurization process. The shunt pipe 801 with a rhombus structure has a good shunt effect while serving as a pipe.

[0036] Among them, the anti-backflow assembly includes: An anti-backflow cover 9, which is hingedly connected to the bottom of the outlet nozzle 802. An installation rod is provided on the other side of the hinge of the anti-backflow cover 9, and an anti-backflow counterweight 901 is threadedly installed on the installation rod. During use, under the action of gravity, the anti-backflow cover 9 is closely attached to the bottom of the outlet nozzle 802. When the outlet nozzle 802 discharges air, the air flow pushes the anti-backflow cover 9 downward, pushing the anti-backflow cover 9 open to realize the discharge of the air flow.

[0037] Among them, the air flow regulating assembly includes: The opening and closing worm 301 is coaxially and fixedly connected to the rear of the valve handle 3; The opening and closing worm gear 4 is rotatably connected to the upper inner side of the intake valve body 10. The opening and closing worm 301 meshes with the opening and closing worm gear 4 to jointly form a worm and worm gear transmission mechanism. During 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 and worm gear transmission mechanism jointly formed by the opening and closing worm 301 and the opening and closing worm gear 4.

[0038] Among them, the air flow regulating assembly further includes: The driving gear 401 is coaxially and fixedly connected to the left end face of the opening and closing worm gear 4; The intermediate transmission member 5 is rotatably connected inside the intake valve body 10; The driven gear ring 503 is fixedly connected to the outside of the intermediate transmission member 5. The driving gear 401 meshes with the driven gear ring 503 to jointly form a gear transmission mechanism. During 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 jointly formed by the driving gear 401 and the driven gear ring 503.

[0039] Among them, the air flow regulating assembly further includes: The upper and lower rack bars 501 are fixedly connected to the upper and lower sides of the right end face of the intermediate transmission member 5; The front and rear rack bars 502 are fixedly connected to the front and rear sides of the right end face of the intermediate transmission member 5; The on-off valve plate 6 is provided with four pieces in total. The four on-off valve plates 6 are circumferentially and arrayedly rotatably connected to the inner side of the intake valve body 10. The rotating shafts of the four on-off valve plates 6 are respectively located on the horizontal and vertical diameter lines of the intake valve body 10; The valve plate gear 601 is coaxially and fixedly connected to the outside of the on-off valve plate 6. The valve plate gears 601 on the upper and lower sides mesh with the upper and lower rack bars 501 to jointly form a rack and pinion transmission structure. The valve plate gears 601 on the front and rear sides mesh with the front and rear rack bars 502 to jointly form a rack and pinion transmission structure. During use, when the intermediate transmission member 5 rotates, the intermediate transmission member 5 drives the on-off valve plate 6 to rotate through the rack and pinion transmission structure, realizing the opening and closing of the on-off valve plate 6.

[0040] Among them, the rack lengths of the front and rear racks 502 and the upper and lower racks 501 are equal. The distances between the front and rear racks 502 and the nearest valve plate gear 601 and between the upper and lower racks 501 and the nearest valve plate gear 601 are not the same and 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 is one rack length farther than the distance between the upper and lower racks 501 and the nearest valve plate gear 601. When the intermediate transmission member 5 rotates, the intermediate transmission member 5 first drives the upper rear and lower front switching valve plates 6 to rotate through the gear-rack transmission mechanism jointly constituted by the valve plate gear 601 and the upper and lower racks 501. When the valve plate gear 601 disengages from the upper and lower racks 501, the front and rear valve plate gears 601 engage with the front and rear racks 502 to drive the upper front and lower rear switching valve plates 6 to rotate, realizing the sequential opening and closing of the paired switching valve plates 6; Embodiment 2: The difference between Embodiment 2 and Embodiment 1 is that: the distances between the front and rear racks 502 / upper and lower racks 501 in the up-down and front-back directions and the nearest valve plate gear 601 are successively one rack length farther. When the intermediate transmission member 5 rotates, first, the upper part is engaged by the valve plate gear 601 and the upper and lower racks 501 to realize the rotation of the upper switching valve plate 6. Then, the lower part is engaged by the valve plate gear 601 and the upper and lower racks 501 to realize the rotation of the lower switching valve plate 6. Then, the front valve plate gear 601 engages with the front and rear racks 502 to drive the front switching valve plate 6 to rotate. Finally, the rear valve plate gear 601 engages with the front and rear racks 502 to drive the rear switching valve plate 6 to rotate, realizing the sequential opening and closing of the four switching valve plates 6.

[0041] Embodiment 3: Please refer to Figures 8 to 10 as shown: The present invention provides a flow splitting device with an anti-backflow function. The air flow regulating assembly further includes: a driving bevel gear 504, which is coaxially and fixedly connected to the left end face of the intermediate transmission member 5 through a connecting shaft; two flow splitting blocking wheels 7, which are respectively rotatably connected inside two flow splitting air distributors 8, and the two flow splitting blocking wheels 7 are coaxially and fixedly connected; a driven bevel gear 701, which is coaxially and fixedly connected to the top of the flow splitting blocking wheel 7. The driving bevel gear 504 and the driven bevel gear 701 engage to jointly constitute a bevel gear transmission mechanism. During use, when the intermediate transmission member 5 rotates, the intermediate transmission member 5 drives the flow splitting blocking wheel 7 to rotate through the bevel gear transmission mechanism jointly constituted by the engagement of the driving bevel gear 504 and the driven bevel gear 701.

[0042] Among them, the air flow regulating assembly further includes: a flow splitting port 803, through which the flow splitting air distributor 8 is communicated with the flow splitting pipe 801; The upper opening 702 is arranged on the outer circumferential surface of the upper flow dividing wheel 7, and the upper opening 702 corresponds to the upper flow dividing port 803 one by one, and the flow dividing wheel 7 blocks the flow dividing port 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 lower diverter port 803 one by one. In use, when the diverter wheel 7 rotates, the opening and closing of the diverter port 803 is realized by changing the overlapping relationship between the upper opening 702 / lower opening 703 and the diverter port 803.

[0043] Among them, the lower opening 703 and the opening width of the lower opening 703, and the relative position with the diversion port 803 can be adjusted accordingly according to the actual situation, so as to realize the selective opening of the diversion tube 801 or adjust the opening degree of the diversion port 803 to meet different usage requirements. For example, the diversion tube 801 can be opened at intervals and fully opened, or a smaller opening degree of the diversion port 803 can be realized to improve the adjustment ability.

[0044] The specific usage and function of this embodiment: when it is necessary to start the desulfurization work, rotate the valve handle 3, the valve handle 3 drives the opening and closing worm wheel 4 to rotate through the worm gear transmission mechanism composed of the opening and closing worm 301 and the opening and closing worm wheel 4, the opening and closing worm wheel 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, 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 plate 6 is opened in sequence; at the same time, the intermediate transmission member 5 is connected to 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 achieving the need to adjust the number of diverter air distributors 8 according to the air 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 that the number of throttling diverter pipes 801 participating in the air intake can be adjusted as needed, which has better adjustment ability and effectively avoids the situation where only the air outlet nozzle close to the main pipe discharges air when the air intake volume is small.

[0045] 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 airflow flows out from the air outlet nozzle 802, the two sides of the bottom of the diverter pipe 801 form a V-shaped structure, which can guide the rising airflow, increase or decrease the fluidity of the airflow, and achieve airflow homogenization, which is convenient for the subsequent desulfurization process.

[0046] Embodiment 4: The difference between Embodiment 4 and Embodiment 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 flow dividing blocking wheel 7 rotates, the lower opening 703 is first connected to the lower flow dividing port 803, enabling the lower flow dividing pipe 801 to discharge gas. When the flow dividing blocking wheel 7 continues to rotate, the upper opening 702 is connected to the upper flow dividing port 803, and the lower opening 703 remains connected to the lower flow dividing port 803, enabling both the upper and lower flow dividing pipes 801 to discharge gas. Thus, the number of flow dividing pipes 801 can be adjusted according to the gas discharge volume requirement, providing better adjustment ability. It should be noted that the parameters of the lower opening 703 and the lower opening 703 need to be coordinated and determined in unison with the positions of the upper and lower racks 501 and the front and rear racks 502.

Claims

1. A shunt device with an anti-backflow function, characterized in that, Comprising: The main body of the desulfurization tower (1); The intake pipe (2), which is fixedly connected to the lower part of the main body of the desulfurization tower (1); The intake valve body (10), which is fixedly connected to the intake pipe (2); The valve handle (3), which is rotatably connected to the top of the intake valve body (10); The flow distribution gas distributor (8), two pieces of the flow distribution gas distributor (8) are provided, and the two pieces of the flow distribution gas distributor (8) are located at the lower inner side of the main body of the desulfurization tower (1), and the flow distribution gas distributor (8) is fixedly connected to the intake pipe (2); The air flow regulating assembly, which is arranged inside the intake valve body (10), the intake pipe (2), and the flow distribution gas distributor (8); The flow dividing pipes (801), which are arranged in a circumferential array on the outer side of the flow distribution gas distributor (8), and the flow dividing pipes (801) are arranged in a circumferential array on the outer side of each flow distribution gas distributor (8); The air outlet nozzles (802), which are uniformly arranged and fixedly connected to the bottom of the flow dividing pipes (801); The anti-backflow assembly, which is arranged at the bottom of the air outlet nozzles (802).

2. The shunt device with anti-backflow function according to claim 1, characterized in that: The flow dividing pipes (801) on the upper and lower two flow distribution gas distributors (8) are installed in a staggered manner.

3. The shunt device with anti-backflow function according to claim 1, characterized in that: The flow dividing pipe (801) is of a Y-shaped structure, the cross section of the flow dividing pipe (801) is of a diamond structure, and one angle of the diamond faces downward.

4. The flow dividing device with anti-backflow function according to claim 1, characterized in that: The anti-backflow assembly includes: The anti-backflow cover (9), the anti-backflow cover (9) is hinged to the bottom of the air outlet nozzle (802), and an installation rod is arranged on the other side of the hinge of the anti-backflow cover (9), and an anti-backflow counterweight (901) is threadedly installed on the installation rod.

5. The shunt device with a backflow prevention function according to claim 1, characterized in that: The air flow regulating assembly includes: The opening and closing worm (301), which is coaxially and fixedly connected to the rear part of the valve handle (3); The opening and closing worm gear (4), which is rotatably connected to the upper inner side of the intake valve body (10), and the opening and closing worm (301) meshes with the opening and closing worm gear (4) to jointly form a worm and worm gear transmission mechanism; The driving gear (401), which is coaxially and fixedly connected to the left end face of the opening and closing worm gear (4); The intermediate transmission member (5), which is rotatably connected inside the intake valve body (10); The driven gear ring (503), which is fixedly connected to the outer side of the intermediate transmission member (5), and the driving gear (401) meshes with the driven gear ring (503) to jointly form a gear transmission mechanism.

6. The shunt device with a backflow prevention function according to claim 1, characterized in that: The air flow regulating assembly further includes: The upper and lower racks (501), which are fixedly connected to the upper and lower sides of the right end face of the intermediate transmission member (5); The front and rear racks (502), which are fixedly connected to the front and rear sides of the right end face of the intermediate transmission member (5); The switching valve plates (6), four pieces of the switching valve plates (6) are provided, the four pieces of the switching valve plates (6) are circumferentially and rotatably connected to the inner side of the intake valve body (10), and the rotating shafts of the four pieces of the switching valve plates (6) are respectively located on the diameters in the horizontal and vertical directions of the intake valve body (10); The valve plate gear (601) is coaxially and fixedly connected to the outside of the switch valve plate (6). The valve plate gears (601) on the upper and lower sides are engaged with the upper and lower racks (501) to jointly form a rack and pinion transmission structure. The valve plate gears (601) on the front and rear sides are engaged with the front and rear racks (502) to jointly form a rack and pinion transmission structure.

7. The flow dividing device with a backflow prevention function according to claim 6, wherein: The rack lengths of the front and rear racks (502) and the upper and lower racks (501) are equal. The distances between the front and rear racks (502) and the nearest valve plate gear (601) are not the same as the distances between the upper and lower racks (501) and the nearest valve plate gear (601).

8. The shunt device with a backflow prevention function according to claim 6 or 7, characterized in that: The air flow regulating assembly further includes: A driving bevel gear (504), which is coaxially and fixedly connected to the left end face of the intermediate transmission member (5) through a connecting shaft; Two flow dividing blocking wheels (7) are provided. The two flow dividing blocking wheels (7) are respectively rotatably connected inside the two flow dividing air distributors (8), and the two flow dividing blocking wheels (7) are coaxially and fixedly connected; A driven bevel gear (701), which is coaxially and fixedly connected to the top of the flow dividing blocking wheel (7). The driving bevel gear (504) and the driven bevel gear (701) are engaged to jointly form a bevel gear transmission mechanism.

9. The shunt device with anti-backflow function as claimed in claim 8, wherein: The air flow regulating assembly further includes: A flow dividing port (803), through which the flow dividing air distributor (8) is communicated with the flow dividing pipe (801); Upper openings (702) are arranged on the outer circumferential surface of the upper flow dividing blocking wheel (7). The upper openings (702) correspond to the upper flow dividing ports (803) one by one, and the flow dividing blocking wheel (7) blocks the flow dividing ports (803); Lower openings (703) are arranged on the outer circumferential surface of the lower flow dividing blocking wheel (7). The lower openings (703) correspond to the lower flow dividing ports (803) one by one.

10. The flow dividing device with anti-backflow function according to claim 9, characterized in that: The opening widths of the lower openings (703) and the relative positions of the lower openings (703) with respect to the flow dividing ports (803) are different.

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