A flue gas desulfurization tower

Abstract

The present application relates to a flue gas desulfurization tower, belonging to the technical field of flue gas treatment. It includes a tower body, a flue gas inlet pipe, a first liquid distributor, a second liquid distributor, a regulating ball, and a regulating assembly. The flue gas inlet pipe penetrates through the tower body. The first liquid distributor is arranged at the smoke outlet end of the flue gas inlet pipe and is connected with a first liquid supply pipe. The second liquid distributor covers the first liquid distributor and is connected with a second liquid supply pipe. The regulating ball is located in the first liquid distributor and is used to move upward under the impact of sulfur-containing flue gas. The regulating assembly includes a regulating rack, a regulating gear, a first-stage regulating part, and a second-stage regulating part. When the regulating ball moves upward, it drives the first-stage regulating part to act through the regulating rack and the regulating gear, and the first-stage regulating part drives the second-stage regulating part to act. The first-stage regulating part first adjusts the first liquid supply pipe to open to the maximum state, and then the second-stage regulating part adjusts the second liquid supply pipe to open to the maximum state. The present application has the effect of enabling the spraying amount of the alkali solution to be dynamically adapted to the amount of flue gas introduced into the desulfurization tower.

Description

Technical Field

[0001] This application relates to the technical field of flue gas treatment, and particularly relates to a flue gas desulfurization tower. Background Art

[0002] When carbon disulfide is produced, sulfur-containing flue gas will be generated. In order to make the flue gas emissions meet the flue gas emission requirements in the national environmental protection standards, it is necessary to carry out desulfurization treatment on the flue gas. At present, in order to avoid scaling and blockage problems during the desulfurization process, a desulfurization tower is mainly used to desulfurize the flue gas by the double-alkali method.

[0003] The existing desulfurization tower includes a tower body, a liquid spraying assembly and a demister. The flue gas is introduced into the tower body, and the liquid spraying assembly sprays an alkali-containing solution, such as an aqueous sodium hydroxide solution, onto the flue gas. The aqueous sodium hydroxide solution can wash the flue gas to remove sulfur oxides in the flue gas through a chemical reaction. The reacted aqueous solution accumulates at the bottom of the desulfurization tower, and the demister dehydrates the reacted flue gas so that the flue gas can be discharged into the atmosphere after meeting the national environmental protection standards.

[0004] In the above solution, since the amount of flue gas introduced into the desulfurization tower is in dynamic change, while the spraying amount of the alkali-containing solution is usually in a fixed state, it is difficult to match the spraying amount of the alkali-containing solution with the amount of flue gas entering the desulfurization tower, which easily leads to waste of the alkali-containing solution or excessive residue of sulfur oxides in the flue gas. Summary of the Invention

[0005] In order to enable the spraying amount of the alkali-containing solution to be dynamically matched with the amount of flue gas introduced into the desulfurization tower, so as to avoid waste of the alkali-containing solution or excessive residue of sulfur oxides in the flue gas, this application provides a flue gas desulfurization tower.

[0006] A flue gas desulfurization tower provided by this application adopts the following technical scheme:

[0007] A flue gas desulfurization tower includes:

[0008] A tower body, with a smoke outlet connected to its top;

[0009] An inlet flue pipe, which is arranged at the middle and lower part of the side wall of the tower body. The end of the inlet flue pipe located inside the tower body faces the smoke outlet, and the inlet flue pipe is used to introduce sulfur-containing flue gas into the tower body;

[0010] A first liquid distributor, which is in the shape of a spherical network pipe and is connected to the end of the inlet flue pipe located inside the tower body. The area surrounded by the inlet flue pipe and the first liquid distributor is communicated. The first liquid distributor is connected to a first liquid supply pipe for supplying an alkali-containing solution. A plurality of first nozzles are connected to the first liquid distributor, and the first nozzles are used to spray the alkali-containing solution in a mist state into the area surrounded by the first liquid distributor;

[0011] The second liquid distributor is in the shape of a shell with a hollow interior and is covered on the first liquid distributor. The second liquid distributor is connected to the tower body. The second liquid distributor is connected to a second liquid supply pipe for supplying an alkaline solution. The second liquid distributor is connected to a plurality of second nozzles, and the second nozzles are used to spray the alkaline solution in a mist state into the area covered by the second liquid distributor.

[0012] A regulating ball is arranged in the first liquid distributor and directly opposite to the end of the smoke inlet pipe, and is used to move away from the smoke inlet pipe when impacted by smoke ejected from the smoke inlet pipe;

[0013] The regulating component includes a regulating rack, a regulating gear, a primary regulating part and a secondary regulating part;

[0014] in,

[0015] The regulating rack is slidably arranged on the outer wall of the smoke inlet pipe along the moving direction of the regulating ball, the regulating rack is connected to the regulating ball, the regulating gear is meshed with the regulating rack and is rotatably connected to the outer wall of the smoke inlet pipe;

[0016] The primary control part and the secondary control part have the same structure. The primary control part includes a switch valve. The switch valve of the primary control part is arranged on the first liquid supply pipe, and the switch valve of the secondary control part is arranged on the second liquid supply pipe. The primary control part is respectively connected to the control gear and the secondary control part in transmission.

[0017] When the regulating ball moves due to the impact of smoke, the regulating gear drives the primary regulating part to adjust the switch valve on the first liquid supply pipe to gradually open to the maximum state. During this process, the primary regulating part drives the secondary regulating part to operate, and the secondary regulating part always controls the switch valve on the second liquid supply pipe to be in the closed state;

[0018] After the switch valve on the first liquid supply pipe is opened to the maximum state, the regulating gear continues to drive the first-level regulating part to operate, and the first-level regulating part controls the switch valve on the first liquid supply pipe to maintain the maximum open state. During this process, the first-level regulating part continues to drive the second-level regulating part to operate, and the second-level regulating part adjusts the switch valve on the second liquid supply pipe to gradually open to the maximum state.

[0019] Optionally, the primary regulating part further includes a support frame, a transmission rack, a transmission gear and a screw, the support frame is connected to the switch valve, the transmission rack is slidably arranged on the support frame, the transmission gear is connected to the valve stem of the switch valve and is used to mesh with the transmission rack, the screw is rotatably arranged on the support frame, and is threadedly penetrated on the transmission rack, the screw is used to drive the transmission rack to slide, and the screw is transmission-connected to the regulating gear chain;

[0020] The screw rod of the first-level regulation part is connected to the screw bevel gear of the second-level regulation part in a transmission manner. The transmission rack of the first-level regulation part is engaged with the corresponding transmission gear in the initial state, and the transmission rack of the second-level regulation part is disengaged from the corresponding transmission gear in the initial state. When the transmission rack of the first-level regulation part is disengaged from the corresponding transmission gear, the transmission rack of the second-level regulation part engages with the corresponding transmission gear.

[0021] Optionally, a demister is provided at the top end inside the tower body. The demister includes demister blades and support rods. A plurality of demister blades are arranged vertically, and a plurality of support rods are provided and are respectively arranged at the top and bottom ends of all the demister blades. The demister blades are connected to the support rods, and the support rods are connected to the inner wall of the tower body.

[0022] Optionally, the support rod is slidably connected to each demister blade.

[0023] Optionally, the regulation assembly further includes a demister regulation part. The demister regulation part includes a regulation telescopic rod and a transmission telescopic rod. The fixed end of the regulation telescopic rod is connected to the tower body, and the movable end of the regulation telescopic rod is connected to the second-level regulation part. When the second-level regulation part operates, the second-level regulation part can drive the movable end of the regulation telescopic rod to contract;

[0024] A plurality of transmission telescopic rods are provided and are respectively arranged between two adjacent demister blades. The fixed end of the transmission telescopic rod is connected to one demister blade, and the movable end of the transmission telescopic rod is connected to another demister blade. A fluid medium flows between the rodless cavity of the regulation telescopic rod and the rod cavity of each transmission telescopic rod through a pipeline. When the regulation telescopic rod contracts, each transmission telescopic rod also contracts.

[0025] Optionally, the cross-section of the tower body is rectangular. The demister blades are generally parallel to two opposite side walls of the tower body, and the two side edges of the demister blades are respectively attached to the other two opposite side walls of the tower body. In the sliding direction of the demister blades relative to the support rods, elastic cloth is connected between the two outermost demister blades and the inner wall of the tower body. The elastic cloth is used to block the flue gas from passing through itself, and the elastic cloth can seal the channel between the demister blades and the inner wall of the tower body.

[0026] Optionally, it further includes a circulation component, which includes a water pump, an annular liquid pipe, and a spray pipe. The water pump is installed on the inner wall of the tower body. The water inlet of the water pump is connected to a liquid inlet pipe, and the liquid inlet pipe extends to the bottom end of the tower body. The water outlet of the water pump is connected to a liquid outlet pipe, and the liquid outlet pipe is connected to the annular liquid pipe. The annular liquid pipe is located at the top of the second liquid distributor and sleeved on the second liquid distributor. A plurality of spray pipes are provided and arranged around the second liquid distributor. All the spray pipes are located within the area surrounded by the annular liquid pipe. One end of the spray pipe is connected to the annular liquid pipe, and the other end is used to spray the reacted solution onto the second liquid distributor. The solution sprayed onto the second liquid distributor by the spray pipe flows along the surface of the second liquid distributor to form a liquid film, and the liquid film is used to react with the washed flue gas.

[0027] Optionally, it further includes a knocking component, which includes a knocking shaft, an impeller, and an elastic rod. The knocking shaft is rotatably arranged on the top of the second liquid distributor. The impeller is sleeved on the knocking shaft. The spraying port of the spray pipe faces the impeller, and the solution sprayed out by the spray pipe is used to impact on the impeller to drive the impeller to rotate. A plurality of elastic rods are arranged around the axis of the knocking shaft. One end of the elastic rod is connected to the knocking shaft, and the other end is used to penetrate between adjacent demisting sheets.

[0028] Optionally, a rotating shaft is rotatably penetrated through the regulating ball, the rotating shaft is connected to a regulating rack, and a plurality of flow disturbing vanes are connected to the regulating ball around the rotating shaft. The flow disturbing vanes are arranged at an angle to the diameter direction of the regulating ball.

[0029] Optionally, a liquid accumulation pipe is connected to the smoke inlet pipe. The connection position of the liquid accumulation pipe and the smoke inlet pipe is directly opposite to the smoke outlet end of the smoke inlet pipe. A liquid accumulation plate is hermetically and slidably arranged at the bottom of the liquid accumulation pipe. A liquid accumulation spring is arranged between the liquid accumulation plate and the liquid accumulation pipe. The liquid accumulation spring is used to drive the liquid accumulation plate to bear the solution flowing into the smoke inlet pipe. When the liquid level of the solution reaches the connection part of the liquid accumulation pipe and the smoke inlet pipe, the liquid accumulation plate slides out of the liquid accumulation pipe.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. A flue gas desulfurization tower of the present application includes a tower body, a smoke inlet pipe, a first liquid distributor, a second liquid distributor, a regulating ball, and a regulating component. Among them, when the regulating ball is impacted by sulfur-containing flue gas, it can move upward. When the regulating ball moves upward, it can drive the screw of the first-level regulating part to rotate. The screw of the first-level regulating part can drive the screw of the second-level regulating part to rotate. The screw of the first-level regulating part first drives the switch valve on the first liquid supply pipe to open to the maximum state, and then the screw of the second-level regulating part drives the switch valve on the second liquid supply pipe to open to the maximum state. Two-stage control of the spraying amount of the alkali-containing solution is realized according to the spraying amount of the sulfur-containing flue gas, so that the spraying amount of the alkali-containing solution can be automatically and dynamically adapted to the amount of flue gas introduced into the desulfurization tower, the alkali-containing solution is not easily wasted, and the sulfur oxides in the flue gas are not easily left over and exceed the standard;

[0032] 2. The flue gas desulfurization tower of the present application further includes a demister. Among them, when the transmission rack of the secondary regulation part slides, it can drive the regulation telescopic rod to contract, so that the regulation telescopic rod drives the transmission telescopic rod to contract, so that the distance between adjacent demister blades can be automatically regulated according to the spraying amount of the alkaline solution. Description of the Drawings

[0033] Figure 1 is a schematic structural diagram of an embodiment of the present application;

[0034] Figure 2 is a schematic structural diagram of the regulation component, the demister, the circulation component and the knocking component;

[0035] Figure 3 is a schematic structural diagram of the first liquid distributor, the second liquid distributor, the primary regulation part and the secondary regulation part;

[0036] Figure 4 is a schematic structural diagram of the transmission telescopic rod;

[0037] Figure 5 is a schematic structural diagram of the liquid accumulation plate and the liquid accumulation spring.

[0038] Description of the Reference Numerals:

[0039] 1. Tower body; 11. Smoke outlet; 2. Inlet smoke pipe; 21. Liquid accumulation pipe; 22. Liquid accumulation plate; 23. Liquid accumulation spring; 24. Connection ring; 3. First liquid distributor; 31. First liquid supply pipe; 32. First spray head; 4. Second liquid distributor; 41. Second liquid supply pipe; 42. Second spray head; 5. Regulation ball; 51. Rotating shaft; 52. Turbulence sheet; 6. Regulation component; 61. Regulation rack; 62. Regulation gear; 63. Primary regulation part; 631. Switch valve; 632. Support frame; 633. Transmission rack; 634. Transmission gear; 635. Screw rod; 64. Secondary regulation part; 65. Demister regulation part; 651. Regulation telescopic rod; 652. Transmission telescopic rod; 6521. Air hole; 653. Regulation main pipe; 654. Regulation branch pipe; 7. Demister; 71. Demister blade; 711. Sliding notch; 72. Support rod; 73. Elastic cloth; 8. Circulation component; 81. Water pump; 811. Liquid inlet pipe; 812. Liquid outlet pipe; 82. Annular liquid pipe; 83. Spray pipe; 9. Knocking component; 91. Knocking shaft; 92. Impeller; 93. Elastic rod. Detailed Embodiment

[0040] The following will further describe the present application in detail Figures 1-5 in conjunction with the attached drawings.

[0041] The embodiment of the present application discloses a flue gas desulfurization tower. Refer to Figure 1 , Figure 2 andFigure 3 , a flue gas desulfurization tower includes a tower body 1, a flue gas inlet pipe 2, a first liquid distributor 3, a second liquid distributor 4, a regulating ball 5 and a regulating component 6. Among them, the regulating component 6 includes a regulating rack 61, a regulating gear 62, a first-stage regulating part 63 and a second-stage regulating part 64.

[0042] Refer to Figure 2 , the tower body 1 is vertically arranged, and a flue gas outlet 11 is connected to the top end.

[0043] The flue gas inlet pipe 2 is fixedly penetrated through the middle and lower part of the side wall of the tower body 1. One end of the flue gas inlet pipe 2 located inside the tower body 1 faces the flue gas outlet 11. The flue gas inlet pipe 2 is used for introducing sulfur-containing flue gas into the tower body 1.

[0044] Refer to Figure 2 and Figure 3 , the first liquid distributor 3 is in the shape of a spherical net tube and is fixedly connected to one end of the flue gas inlet pipe 2 located inside the tower body 1. The area surrounded by the flue gas inlet pipe 2 and the first liquid distributor 3 is communicated. The first liquid distributor 3 is connected to a first liquid supply pipe 31 for supplying an alkali-containing solution. The first liquid supply pipe 31 is fixedly penetrated through the tower body 1. A plurality of first spray nozzles 32 are connected to the first liquid distributor 3. The first spray nozzles 32 are located in the area surrounded by the first liquid distributor 3. The first spray nozzles 32 are used for spraying the alkali-containing solution in a mist state into the area surrounded by the first liquid distributor 3.

[0045] The second liquid distributor 4 is in the shape of a hollow shell and covers the first liquid distributor 3. The second liquid distributor 4 is fixedly connected to the tower body 1. The second liquid distributor 4 is connected to a second liquid supply pipe 41 for supplying an alkali-containing solution. The second liquid supply pipe 41 is fixedly penetrated through the tower body 1. A plurality of second spray nozzles 42 are connected to the second liquid distributor 4. The second spray nozzles 42 are located in the area covered by the second liquid distributor 4. The second spray nozzles 42 are used for spraying the alkali-containing solution in a mist state into the area covered by the second liquid distributor 4.

[0046] Refer to Figure 3 , the regulating ball 5 is arranged in the first liquid distributor 3 and is directly opposite to the end of the flue gas inlet pipe 2. The regulating ball 5 is used to move away from the flue gas inlet pipe 2 when impacted by the flue gas sprayed out of the flue gas inlet pipe 2. When there is no flue gas sprayed out of the flue gas inlet pipe 2, the regulating ball 5 can move to the end position of the flue gas inlet pipe 2. The magnitude of the displacement of the regulating ball 5 can reflect the amount of flue gas instantaneously sprayed out of the flue gas inlet pipe 2. The more flue gas is instantaneously sprayed out of the flue gas inlet pipe 2, the greater the displacement of the regulating ball 5 pushed by the flue gas.

[0047] The regulating rack 61 is slidably arranged on the outer wall of the flue gas inlet pipe 2 along the moving direction of the regulating ball 5. The regulating rack 61 penetrates into the first liquid distributor 3 through the mesh holes of the first liquid distributor 3. The regulating rack 61 is connected to the regulating ball 5. The regulating gear 62 meshes with the regulating rack 61 and is rotatably connected to the outer wall of the flue gas inlet pipe 2.

[0048] The primary control unit 63 and the secondary control unit 64 have the same structure. The primary control unit 63 includes a switching valve 631. The switching valve 631 of the primary control unit 63 is arranged on the first liquid supply pipe 31, and the switching valve 631 of the secondary control unit 64 is arranged on the second liquid supply pipe 41. The primary control unit 63 is respectively in transmission connection with the control gear 62 and the secondary control unit 64. The control ball 5 can drive the control gear 62 to rotate. The control gear 62 can drive the primary control unit 63 to act. The primary control unit 63 can drive the secondary control unit 64 to act. By controlling the opening degree of the switching valve 631, the spraying amount of the alkaline solution can be controlled.

[0049] When the control ball 5 moves under the impact of the flue gas, the control gear 62 drives the primary control unit 63 to adjust the switching valve 631 on the first liquid supply pipe 31 to gradually open to the maximum state. During this process, the primary control unit 63 drives the secondary control unit 64 to act, and the secondary control unit 64 always controls the switching valve 631 on the second liquid supply pipe 41 to be in the closed state. In this process, the first liquid distributor 3 sprays the alkaline solution to the sulfur-containing flue gas through the first spray head 32.

[0050] After the switching valve 631 on the first liquid supply pipe 31 is opened to the maximum state, the control gear 62 continues to drive the primary control unit 63 to act. The primary control unit 63 controls the switching valve 631 on the first liquid supply pipe 31 to maintain the maximum opening state. During this process, the primary control unit 63 continues to drive the secondary control unit 64 to act, and the secondary control unit 64 adjusts the switching valve 631 on the second liquid supply pipe 41 to gradually open to the maximum state. In this process, the first liquid distributor 3 and the second liquid distributor 4 spray the alkaline solution to the sulfur-containing flue gas through the first spray head 32 and the second spray head 42 respectively.

[0051] During use, the sulfur-containing flue gas is introduced into the tower body 1 through the flue gas inlet pipe 2, and the alkaline solution is supplied to the tower body 1 through the first liquid supply pipe 31 and the second liquid supply pipe 41. The alkaline solution washes the sulfur-containing flue gas so that the flue gas can meet the standard for emission.

[0052] When the sulfur-containing flue gas is ejected, the sulfur-containing flue gas can push the control ball 5 to move upward, and the more the sulfur-containing flue gas is ejected instantaneously, the greater the displacement of the control ball 5. The control ball 5 transmits the displacement amount of its own movement to the primary control unit 63 through the control rack 61 and the control gear 62, and the primary control unit 63 then transmits it to the secondary control unit 64.

[0053] In the first half of the process of regulating the movement of the regulating ball 5, the primary regulating unit 63 can gradually open the switching valve 631 on the first liquid supply pipe 31 to the maximum state, and the secondary regulating unit 64 will keep the switching valve 631 on the second liquid supply pipe 41 in a closed state all the time. During this process, only the first liquid distributor 3 sprays the alkali-containing solution through the first nozzle 32; in the second half of the process of regulating the movement of the regulating ball 5, the primary regulating unit 63 has maximized the amount of the alkali-containing solution sprayed by the first liquid distributor 3 through the first nozzle 32. At this time, the secondary regulating unit 64 can gradually open the switching valve 631 on the second liquid supply pipe 41 to the maximum state, and the primary regulating unit 63 keeps the switching valve 631 on the first liquid supply pipe 31 in the maximum open state. During this process, the first liquid distributor 3 sprays the alkali-containing solution through the first nozzle 32 and the second liquid distributor 4 sprays the alkali-containing solution through the second nozzle 42 together.

[0054] During the whole process of regulating the movement of the regulating ball 5, under the hierarchical control of the primary regulating unit 63 and the secondary regulating unit 64, the amount of the sprayed alkali-containing solution can be adapted to the movement displacement of the regulating ball 5 in real time, and the movement displacement of the regulating ball 5 can be dynamically adapted to the amount of the flue gas instantaneously ejected from the smoke inlet pipe 2, so that the amount of the sprayed alkali-containing solution can be dynamically adapted to the amount of the flue gas instantaneously ejected from the smoke inlet pipe 2, making it not easy for the alkali-containing solution to be wasted and not easy for the sulfur oxides in the flue gas to exceed the standard in residue.

[0055] During the process of spraying the alkali-containing solution by the first liquid distributor 3 and the second liquid distributor 4, since the sulfur-containing flue gas needs to flow out of the first liquid distributor 3 first and then flow to the smoke outlet 11 through the bottom of the second liquid distributor 4 during the discharge process, it makes the sulfur-containing flue gas and the alkali-containing solution easier to contact and mix, and makes the reaction between the sulfur-containing flue gas and the alkali-containing solution easier to be complete.

[0056] Specifically, referring to Figure 3 , the primary regulating unit 63 further includes a support frame 632, a transmission rack 633, a transmission gear 634 and a screw 635. The support frame 632 is fixedly connected to the switching valve 631. The transmission rack 633 is slidably arranged on the support frame 632. The transmission gear 634 is fixedly connected to the valve rod of the switching valve 631. The transmission gear 634 is used for meshing with the transmission rack 633. The screw 635 is rotatably arranged through the support frame 632 and is threadedly arranged on the transmission rack 633. The axial direction of the screw 635 is consistent with the sliding direction of the transmission rack 633. The screw 635 is used for driving the transmission rack 633 to slide. The screw 635 is chain-drivenly connected to the regulating gear 62.

[0057] The screw rod 635 of the first-level regulation part 63 is in bevel gear transmission connection with the screw rod 635 of the second-level regulation part 64. The transmission rack 633 of the first-level regulation part 63 is engaged with the corresponding transmission gear 634 in the initial state, and the transmission rack 633 of the second-level regulation part 64 is disengaged from the corresponding transmission gear 634 in the initial state. When the transmission rack 633 of the first-level regulation part 63 is disengaged from the corresponding transmission gear 634, the transmission rack 633 of the second-level regulation part 64 is engaged with the corresponding transmission gear 634.

[0058] When the regulation ball 5 drives the regulation gear 62 to rotate, the regulation gear 62 drives the screw rod 635 of the first-level regulation part 63 to rotate through chain drive, and the screw rod 635 of the first-level regulation part 63 drives the screw rod 635 of the second-level regulation part 64 to rotate through bevel gear transmission; in the first half of the movement of the regulation ball 5, the screw rod 635 of the first-level regulation part 63 drives the transmission rack 633 to slide, and the transmission rack 633 drives the transmission gear 634 to rotate, so that the switching valve 631 on the first liquid supply pipe 31 is gradually opened to the maximum state. Since the transmission rack 633 of the second-level regulation part 64 is disengaged from the corresponding transmission gear 634, the switching valve 631 on the second liquid supply pipe 41 can always be in the closed state; in the second half of the movement of the regulation ball 5, the transmission rack 633 of the first-level regulation part 63 will be disengaged from the transmission gear 634, so that the switching valve 631 on the first liquid supply pipe 31 maintains the maximum open state. At this time, the transmission rack 633 of the second-level regulation part 64 can drive the transmission gear 634 to rotate, so that the switching valve 631 on the second liquid supply pipe 41 is gradually opened to the maximum state. Thus, under the hierarchical control of the first-level regulation part 63 and the second-level regulation part 64, the spraying amount of the alkali-containing solution can be dynamically adapted to the spraying amount of the sulfur-containing flue gas.

[0059] Refer to Figure 2 As shown in, in order to remove the mist and droplets contained in the flue gas, a demister 7 is provided at the top inside the tower body 1. The demister 7 includes demister blades 71 and support rods 72. A plurality of demister blades 71 are arranged vertically, and a plurality of support rods 72 are provided and are respectively arranged at the top and bottom of all the demister blades 71. The demister blades 71 are connected to the support rods 72, and the support rods 72 are fixedly connected to the inner wall of the tower body 1.

[0060] When the flue gas flows through the demister blades 71, the mist and droplets in the flue gas will be retained on the demister blades 71, making it difficult for the flue gas to carry mist and droplets into the environment.

[0061] Furthermore, refer to Figure 2, the support rod 72 is slidably connected to each demisting sheet 71. By sliding the demisting sheet 71, the distance between two adjacent demisting sheets 71 can be reduced, so as to improve the demisting effect of the demister 7. Thus, when the spraying amount of the alkaline solution is increased, the distance between two adjacent demisting sheets 71 can be reduced to ensure the demisting effect of the flue gas.

[0062] Specifically, referring to Figure 4 , a plurality of sliding notches 711 are formed in the demisting sheet 71. The sliding notches 711 correspond to the support rods 72 one by one. The support rods 72 are slidably arranged in the sliding notches 711 of the demisting sheet 71 to form a sliding connection structure between the support rods 72 and the demisting sheets 71.

[0063] Furthermore, referring to Figure 2 、 Figure 3 and Figure 4 , the regulation component 6 further includes a demisting regulation part 65. The demisting regulation part 65 includes a regulation telescopic rod 651 and a transmission telescopic rod 652. The fixed end of the regulation telescopic rod 651 is fixedly connected to the tower body 1. The movable end of the regulation telescopic rod 651 is fixedly connected to the transmission rack 633 of the secondary regulation part 64. When the screw 635 of the secondary regulation part 64 rotates, the transmission rack 633 of the secondary regulation part 64 can drive the movable end of the regulation telescopic rod 651 to contract.

[0064] Referring to Figure 3 and Figure 4 , a plurality of transmission telescopic rods 652 are provided and are respectively arranged between two adjacent demisting sheets 71. The fixed end of the transmission telescopic rod 652 is fixedly connected to one demisting sheet 71, and the movable end of the transmission telescopic rod 652 is fixedly connected to another demisting sheet 71. A fluid medium flows between the rodless cavity of each transmission telescopic rod 652 and the rodless cavity of the regulation telescopic rod 651 through a pipeline. The fluid medium can be air or hydraulic oil. When the regulation telescopic rod 651 contracts, each transmission telescopic rod 652 also contracts.

[0065] Wherein, in order to facilitate the movement of the regulation telescopic rod 651 and the transmission telescopic rod 652, the rodless cavity of the regulation telescopic rod 651 is communicated with the internal space of the tower body 1. An air hole 6521 is formed in the rodless cavity of the transmission telescopic rod 652, and the air hole 6521 communicates the rodless cavity of the transmission telescopic rod 652 with the internal space of the tower body 1.

[0066] The pipeline connecting the control telescopic rod 651 and the drive telescopic rod 652 includes a control main pipe 653 and control branch pipes 654. One end of the control main pipe 653 is connected to the rodless cavity of the control telescopic rod 651. There are multiple control branch pipes 654, which correspond one by one to the drive telescopic rods 652. One end of each control branch pipe 654 is connected to the rod cavity of the corresponding drive telescopic rod 652, and the other end of the control branch pipe 654 is connected to the side wall of the control main pipe 653. The other end of the control main pipe 653 is closed.

[0067] When adjusting the spraying amount of the alkaline solution, the drive rack 633 of the secondary control unit 64 can synchronously drive the control telescopic rod 651 to contract. The control telescopic rod 651 squeezes the fluid medium into the rod cavity of the drive telescopic rod 652 through the control main pipe 653 and the control branch pipes 654. The fluid medium drives the drive telescopic rod 652 to contract, so that the drive telescopic rod 652 can drive two adjacent demisting sheets 71 to slide towards each other, improving the demisting effect of the demister 7 and making the demisting effect of the demister 7 adaptable to the spraying amount of the alkaline solution.

[0068] Refer to Figure 2 , in order to prevent the flue gas from directly discharging without demisting between the demisting sheet 71 and the inner wall of the tower body 1, the cross-section of the tower body 1 is rectangular. The demisting sheet 71 is overall parallel to two opposite side walls of the tower body 1, and the two side edges of the demisting sheet 71 are respectively attached to the other two opposite side walls of the tower body 1. In the sliding direction of the demisting sheet 71 relative to the support rod 72, elastic cloths 73 are fixedly connected between the two outermost demisting sheets 71 and the inner wall of the tower body 1. The elastic cloth 73 is used to block the flue gas from passing through itself, and the elastic cloth 73 can close the channel between the demisting sheet 71 and the inner wall of the tower body 1.

[0069] During the process of adjusting the distance between two adjacent demisting sheets 71, the elastic cloth 73 can be pulled by the demisting sheet 71 to always close the channel between the demisting sheet 71 and the inner wall of the tower body 1. And because the elastic cloth 73 can block the flue gas from passing through itself, the flue gas can only flow from between two adjacent demisting sheets 71 to the smoke outlet 11, making it difficult for the flue gas to directly discharge without demisting.

[0070] Refer to Figure 2 , in order to make the desulfurization of the sulfur-containing flue gas more thorough, a flue gas desulfurization tower of the present application further includes a circulation assembly 8. The circulation assembly 8 includes a water pump 81, an annular liquid pipe 82 and a spray pipe 83.

[0071] The water pump 81 is fixedly connected to the inner wall of the tower body 1. The water inlet of the water pump 81 is communicated with a liquid inlet pipe 811, and the liquid inlet pipe 811 extends to the bottom end of the tower body 1. The water outlet of the water pump 81 is communicated with a liquid outlet pipe 812, and the liquid outlet pipe 812 is communicated with an annular liquid pipe 82. The annular liquid pipe 82 is located at the top of the second liquid distributor 4 and sleeved on the second liquid distributor 4, and the annular liquid pipe 82 is fixedly connected to the inner wall of the tower body 1. A plurality of spray pipes 83 are provided and arranged around the second liquid distributor 4. All the spray pipes 83 are located within the area surrounded by the annular liquid pipe 82. One end of the spray pipe 83 is communicated with the annular liquid pipe 82, and the other end is used for spraying the reacted solution onto the second liquid distributor 4. The solution sprayed by the spray pipe 83 onto the second liquid distributor 4 flows along the surface of the second liquid distributor 4 to form a liquid flow film, and the liquid flow film is used for reacting with the washed flue gas.

[0072] The water pump 81 can suck the solution accumulated at the bottom of the tower body 1 after the reaction into the annular liquid pipe 82. The reacted solution can be sprayed from the spray pipe 83 onto the second liquid distributor 4, and then flow back to the bottom of the tower body 1 in the form of a liquid flow film along the surface of the second liquid distributor 4 from the top of the second liquid distributor 4. The washed flue gas can flow from the space between the second liquid distributor 4 and the inner wall of the tower body 1 to the demister 7. The flue gas and the liquid flow film flow in a countercurrent manner. The residual alkaline components in the liquid flow film can further react with the residual sulfur oxides in the flue gas, so as to make the desulfurization of the sulfur-containing flue gas more thorough.

[0073] Referring to Figure 2 , in order to make it difficult for adjacent two demisting sheets 71 to be blocked by liquid droplets after the distance is reduced, a knocking assembly 9 is further included in a flue gas desulfurization tower of the present application. The knocking assembly 9 includes a knocking shaft 91, an impeller 92 and an elastic rod 93.

[0074] The knocking shaft 91 is rotatably arranged on the top of the second liquid distributor 4. The impeller 92 is sleeved on the knocking shaft 91 and fixedly connected to the knocking shaft 91. The spraying port of the spray pipe 83 faces the impeller 92, and the solution sprayed by the spray pipe 83 is used to impact on the impeller 92 to drive the impeller 92 to rotate. A plurality of elastic rods 93 are arranged along the axis direction of the knocking shaft 91. The elastic rods 93 are inclined. One end of the elastic rod 93 is fixedly connected to the knocking shaft 91, and the other end is used to extend into the space between adjacent two demisting sheets 71.

[0075] The liquid flow sprayed by the spray pipe 83 impacts on the impeller 92. The impeller 92 rotates under the impact force. The impeller 92 drives the knocking shaft 91 to rotate, and the knocking shaft 91 drives the elastic rod 93 to rotate. Since the end of the elastic rod 93 away from the knocking shaft 91 can extend into the space between adjacent two demisting sheets 71, during the rotation of the elastic rod 93 with the knocking shaft 91, the end of the elastic rod 93 can successively knock on the demisting sheet 71, so that the demisting sheet 71 can be knocked and vibrated, thereby making it difficult for adjacent two demisting sheets 71 to be blocked by liquid droplets.

[0076] Reference Figure 3 and Figure 5 Figure 5

[0077] When the sulfur-containing flue gas in the smoke inlet pipe 2 impacts on the regulation ball 5, the sulfur-containing flue gas can not only push the regulation ball 5 to move upward, but also impact on the spoiler 52 to drive the regulation ball 5 to rotate. The rotating regulation ball 5 can disturb the airflow around itself through the spoiler 52, so that the sulfur-containing flue gas and the alkali-containing solution can flow around the regulation ball 5, thereby preventing the sulfur-containing flue gas from directly discharging from the smoke inlet pipe 2 after being ejected, prolonging the contact reaction time between the sulfur-containing flue gas and the alkali-containing solution, and thus making it easier for the sulfur-containing flue gas and the alkali-containing solution to mix and react.

[0078] Reference Figure 5 Figure 5

[0079] The solution flowing into the smoke inlet pipe 2 from the smoke outlet end of the smoke inlet pipe 2 can flow into the liquid accumulation pipe 21. Under the bearing action of the liquid accumulation plate 22, the solution can accumulate in the liquid accumulation pipe 21 first. At the same time, the accumulated solution can drive the liquid accumulation plate 22 to slide down against the elastic force of the liquid accumulation spring 23 due to gravity until the liquid level of the solution reaches the connection position between the liquid accumulation pipe 21 and the smoke inlet pipe 2. At this time, the bottom end of the liquid accumulation pipe 21 is communicated with the inside of the tower body 1, and the solution in the liquid accumulation pipe 21 can be discharged into the tower body 1, thereby making it easier for the solution entering the smoke inlet pipe 2 to be automatically collected and discharged.

[0080] The implementation principle of a flue gas desulfurization tower in an embodiment of this application is as follows: During use, the sulfur-containing flue gas impacts on the regulation ball 5, causing the regulation ball 5 to move upward. The greater the instantaneous ejection amount of the sulfur-containing flue gas, the greater the upward displacement of the regulation ball 5. When the regulation ball 5 moves, the primary regulation unit 63, the secondary regulation unit 64, and the demisting regulation unit 65 act synchronously. The primary regulation unit 63 controls the switch valve 631 on the first liquid supply pipe 31 to gradually open to the maximum state. After the switch valve 631 on the first liquid supply pipe 31 is opened to the maximum state, the secondary regulation unit 64 controls the switch valve 631 on the second liquid supply pipe 41 to gradually open to the maximum state. The demisting regulation unit 65 gradually adjusts the distance between two adjacent demisting blades 71 to narrow, so that the instantaneous ejection amount of the sulfur-containing flue gas can be dynamically adapted to the spraying amount of the alkali-containing solution, and the demisting effect of the demister 7 can be dynamically adapted to the spraying amount of the alkali-containing solution, thereby making it difficult for the alkali-containing solution to be wasted and making it difficult for sulfur oxides in the flue gas to remain in excess of the standard.

[0081] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A flue gas desulfurization tower, characterized in that, include: The tower body (1) has a smoke outlet (11) at its top; A smoke inlet pipe (2) is arranged on the middle and lower part of the side wall of the tower body (1), one end of the smoke inlet pipe (2) located inside the tower body (1) faces the smoke outlet (11), and the smoke inlet pipe (2) is used to introduce sulfur-containing smoke into the tower body (1); The first liquid distributor (3) is in the shape of a spherical mesh tube and is connected to one end of the smoke inlet pipe (2) located inside the tower body (1). The smoke inlet pipe (2) is in communication with the area enclosed by the first liquid distributor (3). The first liquid distributor (3) is in communication with a first liquid supply pipe (31) for supplying an alkaline solution. The first liquid distributor (3) is in communication with a plurality of first nozzles (32). The first nozzles (32) are used to spray the alkaline solution in a mist state into the area enclosed by the first liquid distributor (3). The second liquid distributor (4) is in the shape of a shell with a hollow interior and is disposed on the first liquid distributor (3). The second liquid distributor (4) is connected to the tower body (1). The second liquid distributor (4) is connected to a second liquid supply pipe (41) for supplying an alkaline solution. The second liquid distributor (4) is connected to a plurality of second nozzles (42). The second nozzles (42) are used to spray the alkaline solution in a mist state into an area covered by the second liquid distributor (4). A regulating ball (5) is arranged in the first liquid distributor (3) and is directly opposite to the end of the smoke inlet pipe (2). The regulating ball (5) is used to move away from the smoke inlet pipe (2) when impacted by smoke ejected from the smoke inlet pipe (2); The regulating component (6) comprises a regulating rack (61), a regulating gear (62), a primary regulating part (63) and a secondary regulating part (64); in, The regulating rack (61) is slidably arranged on the outer wall of the smoke inlet pipe (2) along the moving direction of the regulating ball (5), the regulating rack (61) is connected to the regulating ball (5), and the regulating gear (62) is meshed with the regulating rack (61) and is rotatably connected to the outer wall of the smoke inlet pipe (2); The primary regulating part (63) and the secondary regulating part (64) have the same structure. The primary regulating part (63) comprises a switch valve (631). The switch valve (631) of the primary regulating part (63) is arranged on the first liquid supply pipe (31). The switch valve (631) of the secondary regulating part (64) is arranged on the second liquid supply pipe (41). The primary regulating part (63) is respectively connected to the regulating gear (62) and the secondary regulating part (64) in a transmission manner. When the regulating ball (5) is moved by the impact of the smoke, the regulating gear (62) drives the primary regulating part (63) to adjust the switch valve (631) on the first liquid supply pipe (31) to gradually open to the maximum state. During this process, the primary regulating part (63) drives the secondary regulating part (64) to operate, and the secondary regulating part (64) always controls the switch valve (631) on the second liquid supply pipe (41) to be in a closed state. After the switch valve (631) on the first liquid supply pipe (31) is opened to the maximum state, the control gear (62) continues to drive the primary control unit (63) to act. The primary control unit (63) controls the switch valve (631) on the first liquid supply pipe (31) to maintain the maximum open state. During this process, the primary control unit (63) continues to drive the secondary control unit (64) to act, and the secondary control unit (64) adjusts the switch valve (631) on the second liquid supply pipe (41) to gradually open to the maximum state.

2. The flue gas desulfurization tower according to claim 1, wherein, The primary control unit (63) further includes a support frame (632), a transmission rack (633), a transmission gear (634), and a screw rod (635). The support frame (632) is connected to the switch valve (631). The transmission rack (633) is slidably disposed on the support frame (632). The transmission gear (634) is connected to the valve stem of the switch valve (631) and is used to mesh with the transmission rack (633). The screw rod (635) is rotatably disposed on the support frame (632) and is threadedly disposed on the transmission rack (633). The screw rod (635) is used to drive the transmission rack (633) to slide, and the screw rod (635) is chain-drivenly connected to the control gear (62); The screw rod (635) of the primary control unit (63) is bevel-gear-drivenly connected to the screw rod (635) of the secondary control unit (64). The transmission rack (633) of the primary control unit (63) meshes with the corresponding transmission gear (634) in the initial state. The transmission rack (633) of the secondary control unit (64) is disengaged from the corresponding transmission gear (634) in the initial state. When the transmission rack (633) of the primary control unit (63) is disengaged from the corresponding transmission gear (634), the transmission rack (633) of the secondary control unit (64) meshes with the corresponding transmission gear (634).

3. A flue gas desulfurization tower according to claim 1, characterized in that, A demister (7) is provided at the top end inside the tower body (1). The demister (7) includes demister blades (71) and support rods (72). A plurality of demister blades (71) are vertically arranged. A plurality of support rods (72) are provided and are respectively arranged at the top and bottom ends of all the demister blades (71). The demister blades (71) are connected to the support rods (72), and the support rods (72) are connected to the inner wall of the tower body (1).

4. The flue gas desulfurization tower according to claim 3, characterized in that, The support rod (72) is slidably connected to each demister blade (71).

5. A flue gas desulfurization tower according to claim 4, characterized in that, The control assembly (6) further includes a demister control unit (65). The demister control unit (65) includes a control telescopic rod (651) and a transmission telescopic rod (652). The fixed end of the control telescopic rod (651) is connected to the tower body (1), and the movable end of the control telescopic rod (651) is connected to the secondary control unit (64). When the secondary control unit (64) acts, the secondary control unit (64) can drive the movable end of the control telescopic rod (651) to contract; A plurality of transmission telescopic rods (652) are provided and are respectively arranged between two adjacent demisting sheets (71). The fixed end of the transmission telescopic rod (652) is connected to one of the demisting sheets (71), and the movable end of the transmission telescopic rod (652) is connected to the other demisting sheet (71). A fluid medium flows between the rodless cavity of the regulating telescopic rod (651) and the rod cavity of each transmission telescopic rod (652) through a pipeline. When the regulating telescopic rod (651) contracts, each transmission telescopic rod (652) also contracts.

6. A flue gas desulfurization tower according to claim 4, characterized in that, The cross-section of the tower body (1) is rectangular. The demisting sheets (71) are parallel to two opposite side walls of the tower body (1) as a whole. The two side edges of the demisting sheets (71) are respectively attached to the other two opposite side walls of the tower body (1). In the sliding direction of the demisting sheets (71) relative to the support rods (72), elastic cloths (73) are connected between the two outermost demisting sheets (71) and the inner wall of the tower body (1). The elastic cloths (73) are used to block the flue gas from passing through themselves, and the elastic cloths (73) can close the channels between the demisting sheets (71) and the inner wall of the tower body (1).

7. A flue gas desulfurization tower according to claim 4, characterized in that, It further includes a circulation assembly (8). The circulation assembly (8) includes a water pump (81), an annular liquid pipe (82) and a spray pipe (83). The water pump (81) is installed on the inner wall of the tower body (1). The water inlet of the water pump (81) is communicated with a liquid inlet pipe (811), and the liquid inlet pipe (811) extends to the bottom end of the tower body (1). The water outlet of the water pump (81) is communicated with a liquid outlet pipe (812), and the liquid outlet pipe (812) is communicated with the annular liquid pipe (82). The annular liquid pipe (82) is located at the top of the second liquid distributor (4) and is sleeved on the second liquid distributor (4). A plurality of spray pipes (83) are provided and are arranged around the second liquid distributor (4). All the spray pipes (83) are located within the area surrounded by the annular liquid pipe (82). One end of the spray pipe (83) is communicated with the annular liquid pipe (82), and the other end is used to spray the reacted solution onto the second liquid distributor (4). The solution sprayed onto the second liquid distributor (4) by the spray pipe (83) flows along the surface of the second liquid distributor (4) to form a liquid flow film, and the liquid flow film is used to react with the washed flue gas.

8. A flue gas desulfurization tower according to claim 7, characterized in that, It further includes a knocking assembly (9). The knocking assembly (9) includes a knocking shaft (91), an impeller (92) and an elastic rod (93). The knocking shaft (91) is rotatably arranged on the top of the second liquid distributor (4). The impeller (92) is sleeved on the knocking shaft (91). The spraying port of the spray pipe (83) faces the impeller (92). The solution sprayed out by the spray pipe (83) is used to impact on the impeller (92) to drive the impeller (92) to rotate. A plurality of elastic rods (93) are arranged along the axis direction of the knocking shaft (91). One end of the elastic rod (93) is connected to the knocking shaft (91), and the other end is used to extend into the space between two adjacent demisting sheets (71).

9. A flue gas desulfurization tower according to claim 1, characterized in that, A rotating shaft (51) is rotatably penetrated through the control ball (5). The rotating shaft (51) is connected to a control rack (61). A plurality of spoiler vanes (52) are connected to the control ball (5) around the rotating shaft (51). The spoiler vanes (52) are arranged at an angle with respect to the diameter direction of the control ball (5).

10. A flue gas desulfurization tower according to claim 1, characterized in that, A liquid accumulation pipe (21) is communicated with the smoke inlet pipe (2). The communication position between the liquid accumulation pipe (21) and the smoke inlet pipe (2) is opposite to the smoke outlet end of the smoke inlet pipe (2). A liquid accumulation plate (22) is hermetically and slidably arranged at the bottom of the liquid accumulation pipe (21). A liquid accumulation spring (23) is arranged between the liquid accumulation plate (22) and the liquid accumulation pipe (21). The liquid accumulation spring (23) is used to drive the liquid accumulation plate (22) to bear the solution flowing into the smoke inlet pipe (2). When the liquid level of the solution reaches the communication part between the liquid accumulation pipe (21) and the smoke inlet pipe (2), the liquid accumulation plate (22) slides out of the liquid accumulation pipe (21).

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