Flue gas desulfurization tower

Abstract

The invention relates to a flue gas desulfurization tower, and relates to the technical field of flue gas treatment.The flue gas desulfurization tower comprises a tower body, a flue gas inlet pipe, a first liquid distributor, a second liquid distributor, a regulation ball and a regulation assembly, the flue gas inlet pipe is arranged on the tower body in a penetrating mode, the first liquid distributor is arranged at the flue gas outlet end of the flue gas inlet pipe and communicates with a first liquid supply pipe, the second liquid distributor covers the first liquid distributor, and the regulation ball communicates with a second liquid supply pipe; the regulation and control assembly comprises a regulation and control rack, a regulation and control gear, a first-stage regulation and control part and a second-stage regulation and control part, the regulation and control ball drives the first-stage regulation and control part to act through the regulation and control rack and the regulation and control gear when the regulation and control ball moves upwards, and the second-stage regulation and control part drives the second-stage regulation and control part to act through the regulation and control gear when the regulation and control ball moves upwards. The first-stage regulation and control part drives the second-stage regulation and control part to act, the first-stage regulation and control part firstly regulates the first liquid supply pipe to be opened to the maximum state, and then the second-stage regulation and control part regulates the second liquid supply pipe to be opened to the maximum state. The device has the effect that the spraying amount of the alkali-containing solution can be dynamically matched with 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 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 emission 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 make the spraying amount of the alkali-containing solution dynamically match 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 solutions: A flue gas desulfurization tower includes: A tower body, the top of which is connected to a smoke outlet; 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; 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 spray nozzles are connected to the first liquid distributor, and the first spray nozzles are used to spray the alkali-containing solution in a mist state into the area surrounded by the first liquid distributor; 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. 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; The regulating component includes a regulating rack, a regulating gear, a primary regulating part and a secondary regulating part; in, 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; 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. 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; 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.

[0007] 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; The screw of the primary regulating part is connected to the screw bevel gear of the secondary regulating part. The transmission rack of the primary regulating part is meshed with the corresponding transmission gear in the initial state, and the transmission rack of the secondary regulating part is disengaged from the corresponding transmission gear in the initial state. When the transmission rack of the primary regulating part is disengaged from the corresponding transmission gear, the transmission rack of the secondary regulating part enters into meshing with the corresponding transmission gear.

[0008] Optionally, a demister is provided at the top inside the tower body. The demister includes demister sheets and support rods. A plurality of demister sheets are arranged vertically. A plurality of support rods are provided and are respectively arranged at the top and bottom of all the demister sheets. The demister sheets are connected to the support rods, and the support rods are connected to the inner wall of the tower body.

[0009] Optionally, the support rod is slidably connected to each demister sheet.

[0010] 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 secondary regulation part. When the secondary regulation part operates, the secondary regulation part can drive the movable end of the regulation telescopic rod to contract; A plurality of transmission telescopic rods are provided and are respectively arranged between two adjacent demister sheets. The fixed end of the transmission telescopic rod is connected to one demister sheet, and the movable end of the transmission telescopic rod is connected to another demister sheet. A fluid medium flows between the rodless cavity of the regulation telescopic rod and the rod chamber of each transmission telescopic rod through a pipeline. When the regulation telescopic rod contracts, each transmission telescopic rod also contracts.

[0011] Optionally, the cross-section of the tower body is rectangular. The demister sheets are generally parallel to two opposite side walls of the tower body, and the two side edges of the demister sheets are respectively attached to the other two opposite side walls of the tower body. In the sliding direction of the demister sheets relative to the support rods, elastic cloths are connected between the two outermost demister sheets and the inner wall of the tower body. The elastic cloth is used to prevent the flue gas from passing through itself, and the elastic cloth can seal the channel between the demister sheets and the inner wall of the tower body.

[0012] Optionally, a circulation assembly is further included. The circulation assembly 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 communicated with a liquid inlet pipe, and the liquid inlet pipe extends to the bottom of the tower body. The water outlet of the water pump is communicated with a liquid outlet pipe, and the liquid outlet pipe is communicated with the annular liquid pipe. The annular liquid pipe is located at the top of the second liquid distributor and is sleeved on the second liquid distributor. A plurality of spray pipes are provided and are arranged around the second liquid distributor. All the spray pipes are located in the area surrounded by the annular liquid pipe. One end of the spray pipe is communicated with the annular liquid pipe, and the other end is used for spraying 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 flow film, and the liquid flow film is used to react with the washed flue gas.

[0013] 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. The solution sprayed 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 extend into the space between two adjacent demisting sheets.

[0014] Optionally, a rotating shaft is rotatably penetrated through the regulating ball. The rotating shaft is connected to the regulating rack. 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 with respect to the diameter direction of the regulating ball.

[0015] Optionally, a liquid accumulation pipe is communicated with the smoke inlet pipe. The communication position between 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 communication part between the liquid accumulation pipe and the smoke inlet pipe, the liquid accumulation plate slides out of the liquid accumulation pipe.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 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 primary regulating part to rotate. The screw of the primary regulating part can drive the screw of the secondary regulating part to rotate. The screw of the primary 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 secondary 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, making the alkali-containing solution not easy to be wasted and making the sulfur oxides in the flue gas not easy to remain and exceed the standard; 2. A flue gas desulfurization tower of the present application further includes a demister. Among them, when the transmission rack of the secondary regulating part slides, it can drive the regulating telescopic rod to contract, so that the regulating telescopic rod drives the transmission telescopic rod to contract, so that the distance between adjacent demisting sheets can be automatically regulated according to the spraying amount of the alkali-containing solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present application; Figure 2 is a schematic structural diagram of the regulating component, the demister, the circulation component and the knocking component; Figure 3 is a schematic structural diagram of the first liquid distributor, the second liquid distributor, the primary regulating part and the secondary regulating part; Figure 4 It is a schematic structural diagram of a transmission telescopic rod; Figure 5 It is a schematic structural diagram of a liquid accumulation plate and a liquid accumulation spring.

[0018] Explanation of reference numerals: 1. Tower body; 11. Smoke outlet; 2. Smoke inlet pipe; 21. Liquid accumulation pipe; 22. Liquid accumulation plate; 23. Liquid accumulation spring; 24. Connecting 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 generating vane; 6. Regulation assembly; 61. Regulation rack; 62. Regulation gear; 63. First-level regulation part; 631. Switch valve; 632. Support frame; 633. Transmission rack; 634. Transmission gear; 635. Screw rod; 64. Second-level regulation part; 65. Demisting regulation part; 651. Regulation telescopic rod; 652. Transmission telescopic rod; 6521. Air hole; 653. Regulation main pipe; 654. Regulation branch pipe; 7. Demister; 71. Demisting sheet; 711. Sliding notch; 72. Support rod; 73. Elastic cloth; 8. Circulation assembly; 81. Water pump; 811. Liquid inlet pipe; 812. Liquid outlet pipe; 82. Annular liquid pipe; 83. Spray pipe; 9. Knocking assembly; 91. Knocking shaft; 92. Impeller; 93. Elastic rod. Detailed implementation manners

[0019] The following is a further detailed description of the present application in conjunction with the attached Figures 1-5 drawings.

[0020] An embodiment of the present application discloses a flue gas desulfurization tower. Referring to Figure 1 , Figure 2 and Figure 3 , a flue gas desulfurization tower includes a tower body 1, a smoke inlet pipe 2, a first liquid distributor 3, a second liquid distributor 4, a regulation ball 5 and a regulation assembly 6. Among them, the regulation assembly 6 includes a regulation rack 61, a regulation gear 62, a first-level regulation part 63 and a second-level regulation part 64.

[0021] Referring to Figure 2 , the tower body 1 is vertically arranged, and a smoke outlet 11 is connected to the top end.

[0022] The smoke 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 smoke inlet pipe 2 located inside the tower body 1 faces the smoke outlet 11. The smoke inlet pipe 2 is used to introduce sulfur-containing flue gas into the tower body 1.

[0023] Referring to Figure 2 and Figure 3The first liquid distributor 3 is in the shape of a spherical mesh tube and is fixedly connected to one end of the smoke inlet pipe 2 located in the tower body 1. The smoke inlet pipe 2 is connected to the area surrounded by the first liquid distributor 3. The first liquid distributor 3 is connected to a first liquid supply pipe 31 for supplying an alkaline solution. The first liquid supply pipe 31 is fixedly penetrated on the tower body 1. The first liquid distributor 3 is connected to a plurality of first nozzles 32. The first nozzles 32 are located in the area surrounded by the first liquid distributor 3. The first nozzles 32 are used to spray the alkaline solution in a mist state into the area surrounded by the first liquid distributor 3.

[0024] The second liquid distributor 4 is in the shape of a shell with a hollow interior and is covered on 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 alkaline solution. The second liquid supply pipe 41 is fixedly penetrated on the tower body 1. The second liquid distributor 4 is connected to a plurality of second nozzles 42. The second nozzles 42 are located in the area covered by the second liquid distributor 4. The second nozzles 42 are used to spray the alkaline solution in a mist state into the area covered by the second liquid distributor 4.

[0025] Reference Figure 3 The 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 the smoke ejected from the smoke inlet pipe 2. When there is no smoke ejected from the smoke inlet pipe 2, the regulating ball 5 can move to the end position of the smoke inlet pipe 2. The size of the movement displacement of the regulating ball 5 can reflect the amount of smoke ejected instantaneously from the smoke inlet pipe 2. The more smoke ejected instantaneously from the smoke inlet pipe 2, the greater the displacement of the regulating ball 5 pushed by the smoke.

[0026] The regulating rack 61 is slidably set on the outer wall of the smoke inlet pipe 2 along the moving direction of the regulating ball 5. The regulating rack 61 penetrates into the first liquid distributor 3 from the mesh of the first liquid distributor 3. The regulating rack 61 is connected to the regulating ball 5. 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.

[0027] The primary regulating part 63 and the secondary regulating part 64 have the same structure. The primary regulating part 63 includes a switch valve 631. The switch valve 631 of the primary regulating part 63 is arranged on the first liquid supply pipe 31, and 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 transmission. The regulating ball 5 can drive the regulating gear 62 to rotate, the regulating gear 62 can drive the primary regulating part 63 to move, and the primary regulating part 63 can drive the secondary regulating part 64 to move. The spraying amount of the alkaline solution can be controlled by controlling the opening degree of the switch valve 631.

[0028] When the control ball 5 moves under the impact of the flue gas, the control gear 62 drives the first-level control 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 first-level control part 63 drives the second-level control part 64 to act, and the second-level control part 64 always controls the switch valve 631 on the second liquid supply pipe 41 to be in the closed state. During this process, the first liquid distributor 3 sprays the alkali-containing solution into the sulfur-containing flue gas through the first spray head 32.

[0029] 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 first-level control part 63 to act, and the first-level control part 63 controls the switch valve 631 on the first liquid supply pipe 31 to maintain the maximum open state. During this process, the first-level control part 63 continues to drive the second-level control part 64 to act, and the second-level control part 64 adjusts the switch valve 631 on the second liquid supply pipe 41 to gradually open to the maximum state. During this process, the first liquid distributor 3 sprays the alkali-containing solution into the sulfur-containing flue gas through the first spray head 32 and the second liquid distributor 4 sprays the alkali-containing solution into the sulfur-containing flue gas through the second spray head 42 together.

[0030] During use, the sulfur-containing flue gas is introduced into the tower body 1 through the flue gas inlet pipe 2, and the alkali-containing solution is supplied into the tower body 1 through the first liquid supply pipe 31 and the second liquid supply pipe 41. The alkali-containing solution washes the sulfur-containing flue gas so that the flue gas can meet the standard for emission.

[0031] 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 first-level control part 63 through the control rack 61 and the control gear 62, and the first-level control part 63 then transmits it to the second-level control part 64.

[0032] In the first half of the movement of the control ball 5, the first-level control part 63 can gradually open the switch valve 631 on the first liquid supply pipe 31 to the maximum state, and the second-level control part 64 will always keep the switch valve 631 on the second liquid supply pipe 41 in the closed state. During this process, only the first liquid distributor 3 sprays the alkali-containing solution through the first spray head 32; in the second half of the movement of the control ball 5, the first-level control part 63 has maximized the amount of the alkali-containing solution sprayed by the first liquid distributor 3 through the first spray head 32. At this time, the second-level control part 64 can gradually open the switch valve 631 on the second liquid supply pipe 41 to the maximum state, and the first-level control part 63 makes the switch valve 631 on the first liquid supply pipe 31 maintain the maximum open state. During this process, the first liquid distributor 3 sprays the alkali-containing solution through the first spray head 32 and the second liquid distributor 4 sprays the alkali-containing solution through the second spray head 42 together.

[0033] 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 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 inlet pipe 2, making it difficult for the alkali-containing solution to be wasted, and it is also difficult for the sulfur oxides in the flue gas to exceed the standard residue.

[0034] During the process of spraying the alkali-containing solution by using 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 from the bottom of the second liquid distributor 4 during the discharge process, it makes it easier for the sulfur-containing flue gas to come into contact and mix with the alkali-containing solution, and makes the reaction between the sulfur-containing flue gas and the alkali-containing solution more thorough.

[0035] 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 rod 635. The support frame 632 is fixedly connected to the switch valve 631. The transmission rack 633 is slidably arranged on the support frame 632. The transmission gear 634 is fixedly connected to the valve stem of the switch valve 631. The transmission gear 634 is used to mesh with the transmission rack 633. The screw rod 635 is rotatably penetrated through the support frame 632 and is threadedly penetrated through the transmission rack 633. The axial direction of the screw rod 635 is consistent with the sliding direction of the transmission rack 633. The screw rod 635 is used to drive the transmission rack 633 to slide. The screw rod 635 is chain-drivenly connected to the regulating gear 62.

[0036] The screw rod 635 of the primary regulating unit 63 is bevel-gear-drivenly connected to the screw rod 635 of the secondary regulating unit 64. The transmission rack 633 of the primary regulating unit 63 is meshed with the corresponding transmission gear 634 in the initial state. The transmission rack 633 of the secondary regulating unit 64 is disengaged from the corresponding transmission gear 634 in the initial state. When the transmission rack 633 of the primary regulating unit 63 is disengaged from the corresponding transmission gear 634, the transmission rack 633 of the secondary regulating unit 64 is engaged with the corresponding transmission gear 634.

[0037] When the control ball 5 drives the control gear 62 to rotate, the control gear 62 drives the screw 635 of the first-level control part 63 to rotate through chain drive, and the screw 635 of the first-level control part 63 drives the screw 635 of the second-level control part 64 to rotate through bevel gear drive; in the first half of the movement of the control ball 5, the screw 635 of the first-level control part 63 drives the transmission rack 633 to slide, and the transmission rack 633 drives the transmission gear 634 to rotate, so that the switch 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 control part 64 is disengaged from the corresponding transmission gear 634, the switch 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 control ball 5, the transmission rack 633 of the first-level control part 63 will be disengaged from the transmission gear 634, so that the switch 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 control part 64 can drive the transmission gear 634 to rotate, so that the switch 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 control part 63 and the second-level control part 64, the spraying amount of the alkali-containing solution can be dynamically adapted to the spraying amount of the sulfur-containing flue gas.

[0038] Referring to Figure 2 , 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.

[0039] 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.

[0040] Furthermore, referring to Figure 2 , the support rods 72 are slidably connected to each demister blade 71. By sliding the demister blades 71, the distance between two adjacent demister blades 71 can be reduced to improve the demisting effect of the demister 7. Thus, when increasing the spraying amount of the alkali-containing solution, the distance between two adjacent demister blades 71 can be reduced to ensure the demisting effect of the flue gas.

[0041] Particularly, referring to Figure 4 , a plurality of sliding notches 711 are formed in the demister blades 71. The sliding notches 711 correspond to the support rods 72 one by one, and the support rods 72 are slidably arranged in the sliding notches 711 of the demister blades 71 to form a sliding connection structure between the support rods 72 and the demister blades 71.

[0042] Even further, referring to Figure 2 、 Figure 3 andFigure 4 Moreover, 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, and 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.

[0043] Refer 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 of the demisting sheets 71, and the movable end of the transmission telescopic rod 652 is fixedly connected to the other 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.

[0044] 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, and an air hole 6521 is provided on the rodless cavity of the transmission telescopic rod 652. The air hole 6521 communicates the rodless cavity of the transmission telescopic rod 652 with the internal space of the tower body 1.

[0045] The pipeline connecting the regulation telescopic rod 651 and the transmission telescopic rod 652 includes a regulation main pipe 653 and a regulation branch pipe 654. One end of the regulation main pipe 653 is communicated with the rodless cavity of the regulation telescopic rod 651. A plurality of regulation branch pipes 654 are provided and correspond to the transmission telescopic rods 652 one by one. One end of the regulation branch pipe 654 is communicated with the rodless cavity of the corresponding transmission telescopic rod 652, and the other end of the regulation branch pipe 654 is communicated with the side wall of the regulation main pipe 653. The other end of the regulation main pipe 653 is closed.

[0046] When adjusting the spraying amount of the alkaline solution, the transmission rack 633 of the secondary regulation part 64 can synchronously drive the regulation telescopic rod 651 to contract. The regulation telescopic rod 651 squeezes the fluid medium into the rodless cavity of the transmission telescopic rod 652 through the regulation main pipe 653 and the regulation branch pipe 654. The fluid medium drives the transmission telescopic rod 652 to contract, so that the transmission telescopic rod 652 can drive two adjacent demisting sheets 71 to slide towards each other, improving the demisting effect of the demister 7 and enabling the demisting effect of the demister 7 to adapt to the spraying amount of the alkaline solution.

[0047] 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 parallel to two opposite side walls of the tower body 1 as a whole. 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 cloth 73 is 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.

[0048] 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.

[0049] 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.

[0050] 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 connected to 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 connected to a liquid outlet pipe 812, and the liquid outlet pipe 812 is connected to the 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. The annular liquid pipe 82 is fixedly connected to the inner wall of the tower body 1. There are multiple spray pipes 83, and they 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 connected to 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.

[0051] 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 reflows from the top of the second liquid distributor 4 along the surface of the second liquid distributor 4 in the form of a liquid flow film to the bottom of the tower body 1. 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 countercurrent. The residual alkaline components in the liquid flow film can further react with the residual sulfur oxides in the flue gas to make the desulfurization of the sulfur-containing flue gas more thorough.

[0052] Refer to Figure 2, in order to prevent adjacent demisting sheets 71 from being easily blocked by droplets after the distance between them is reduced, a flue gas desulfurization tower of the present application further includes a knocking assembly 9, and the knocking assembly 9 includes a knocking shaft 91, an impeller 92 and an elastic rod 93.

[0053] 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 jet port of the nozzle 83 faces the impeller 92, and the solution ejected from the nozzle 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 axial 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 two adjacent demisting sheets 71.

[0054] The liquid flow ejected from the nozzle 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 two adjacent demisting sheets 71, during the rotation of the elastic rod 93 with the knocking shaft 91, the end of the elastic rod 93 can knock on the demisting sheet 71 one by one, so that the demisting sheet 71 can be knocked and vibrated, thereby preventing the space between two adjacent demisting sheets 71 from being easily blocked by droplets.

[0055] Refer to Figure 3 and Figure 5 , in order to facilitate the mixing and reaction of sulfur-containing flue gas and alkali-containing solution, a rotating shaft 51 is rotatably penetrated through the regulating ball 5. The rotating shaft 51 is fixedly connected to the regulating rack 61. A plurality of flow disturbing vanes 52 are fixedly connected to the regulating ball 5 around the rotating shaft 51. The flow disturbing vanes 52 are arranged at an angle to the diameter direction of the regulating ball 5.

[0056] When the sulfur-containing flue gas in the smoke inlet pipe 2 impacts on the regulating ball 5, the sulfur-containing flue gas can not only push the regulating ball 5 upward, but also impact on the flow disturbing vanes 52 to drive the regulating ball 5 to rotate. The rotating regulating ball 5 can disturb the air flow around itself through the flow disturbing vanes 52, so that the sulfur-containing flue gas and the alkali-containing solution can flow around the regulating ball 5, thereby preventing the sulfur-containing flue gas from directly discharging from the smoke inlet pipe 2 after being ejected and extending the contact reaction time between the sulfur-containing flue gas and the alkali-containing solution, and further facilitating the mixing and reaction of the sulfur-containing flue gas and the alkali-containing solution.

[0057] Refer to Figure 5, in order to facilitate the automatic collection and discharge of the solution flowing into the smoke inlet pipe 2, a liquid accumulation pipe 21 is connected to the smoke inlet pipe 2. The connection 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. One end of the liquid accumulation spring 23 is fixedly connected to the liquid accumulation plate 22, and the other end of the liquid accumulation spring 23 is fixedly connected with a connection ring 24. The connection ring 24 is fixedly connected to 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 connection position 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.

[0058] 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 first accumulate in the liquid accumulation pipe 21. 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, so that the solution flowing into the smoke inlet pipe 2 is easy to be automatically collected and discharged.

[0059] The implementation principle of a flue gas desulfurization tower according to an embodiment of the present 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 part 63, the secondary regulation part 64, and the demisting regulation part 65 act synchronously. The primary regulation part 63 controls the on-off valve 631 on the first liquid supply pipe 31 to gradually open to the maximum state. After the on-off valve 631 on the first liquid supply pipe 31 is opened to the maximum state, the secondary regulation part 64 controls the on-off valve 631 on the second liquid supply pipe 41 to gradually open to the maximum state. The demisting regulation part 65 gradually adjusts the distance between two adjacent demisting sheets 71 to decrease, 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 the alkali-containing solution not easy to be wasted, and the sulfur oxides in the flue gas not easy to remain exceeding the standard.

[0060] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present 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 regulating gear (62) continues to drive the primary regulating unit (63) to operate, and the primary regulating 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 regulating unit (63) continues to drive the secondary regulating unit (64) to operate, and the secondary regulating unit (64) adjusts the switch valve (631) on the second liquid supply pipe (41) to gradually open to the maximum state.

2. A flue gas desulfurization tower according to claim 1, characterized in that: The primary control unit (63) further comprises a support frame (632), a transmission rack (633), a transmission gear (634) and a screw (635); the support frame (632) is connected to the switch valve (631); the transmission rack (633) is slidably arranged 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 (635) is rotatably arranged on the support frame (632) and is threadedly penetrated on the transmission rack (633); the screw (635) is used to drive the transmission rack (633) to slide; and the screw (635) is chain-drivenly connected to the control gear (62); The screw rod (635) of the primary regulating part (63) is connected to the screw rod (635) of the secondary regulating part (64) by bevel gear transmission; the transmission rack (633) of the primary regulating part (63) is meshed with the corresponding transmission gear (634) in an initial state; the transmission rack (633) of the secondary regulating part (64) is disengaged from the corresponding transmission gear (634) in an initial state; when the transmission rack (633) of the primary regulating part (63) is disengaged from the corresponding transmission gear (634), the transmission rack (633) of the secondary regulating part (64) is meshed with the corresponding transmission gear (634).

3. A flue gas desulfurization tower according to claim 1, characterized in that: A demister (7) is arranged at the top end of the interior of the tower body (1), the demister (7) comprising a demister sheet (71) and a support rod (72), a plurality of demister sheets (71) are arranged vertically, a plurality of support rods (72) are arranged and are arranged at the top end and the bottom end of all the demister sheets (71), respectively, the demister sheets (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. A flue gas desulfurization tower according to claim 3, characterized in that: The support rod (72) is slidably connected to each demisting sheet (71).

5. A flue gas desulfurization tower according to claim 4, characterized in that: The control assembly (6) further comprises a demisting control unit (65), the demisting control unit (65) comprising a control telescopic rod (651) and a transmission telescopic rod (652), the fixed end of the control telescopic rod (651) being connected to the tower body (1), the movable end of the control telescopic rod (651) being connected to the secondary control unit (64), and when the secondary control unit (64) is in motion, the secondary control unit (64) can drive the movable end of the control telescopic rod (651) to retract; A plurality of transmission telescopic rods (652) are provided, and are respectively provided between two adjacent defogger sheets (71); a fixed end of the transmission telescopic rod (652) is connected to one of the defogger sheets (71), and a movable end of the transmission telescopic rod (652) is connected to the other defogger sheet (71); a fluid medium flows between the rod cavity of each transmission telescopic rod (652) and the rodless cavity of the regulating telescopic rod (651) 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 demister sheet (71) is generally parallel to two opposite side walls of the tower body (1), and two side edges of the demister sheet (71) are respectively attached to the other two opposite side walls of the tower body (1), and in the sliding direction of the demister sheet (71) relative to the support rod (72), elastic cloth (73) is connected between the two outermost demister sheets (71) and the inner wall of the tower body (1), and the elastic cloth (73) is used to prevent smoke from passing through itself, and the elastic cloth (73) can close the passage between the demister sheet (71) and the inner wall of the tower body (1).

7. A flue gas desulfurization tower according to claim 4, characterized in that: The tower (1) further comprises a circulation assembly (8), the circulation assembly (8) comprising a water pump (81), an annular liquid pipe (82) and a spray pipe (83), the water pump (81) being mounted on the inner wall of the tower body (1), the water inlet of the water pump (81) being connected to a liquid inlet pipe (811), the liquid inlet pipe (811) extending to the bottom end of the tower body (1), the water outlet of the water pump (81) being connected to a liquid outlet pipe (812), the liquid outlet pipe (812) being connected to the annular liquid pipe (82), the annular liquid pipe (82) being located at the top end of the second liquid distributor (4), The nozzle (83) is sleeved on the second liquid distributor (4), a plurality of nozzles (83) are provided, and are arranged around the second liquid distributor (4), all of the nozzles (83) are located in the area surrounded by the annular liquid pipe (82), one end of the nozzle (83) is connected to 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 nozzle (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 flue gas after washing.

8. A flue gas desulfurization tower according to claim 7, characterized in that: The invention also comprises a knocking assembly (9), the knocking assembly (9) comprising a knocking shaft (91), an impeller (92) and an elastic rod (93), the knocking shaft (91) being rotatably arranged on the top end of the second liquid distributor (4), the impeller (92) being sleeved on the knocking shaft (91), the injection port of the nozzle (83) facing the impeller (92), the solution sprayed out by the nozzle (83) being used to impact on the impeller (92) so as to drive the impeller (92) to rotate, a plurality of elastic rods (93) being arranged around the axis direction of the knocking shaft (91), one end of the elastic rod (93) being connected to the knocking shaft (91), and the other end being used to probe 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 provided on the regulating ball (5), the rotating shaft (51) is connected to the regulating rack (61), a plurality of spoilers (52) are connected to the regulating ball (5) around the rotating shaft (51), and the spoilers (52) are arranged at an angle with respect to the diameter direction of the regulating ball (5).

10. A flue gas desulfurization tower according to claim 1, characterized in that: The smoke inlet pipe (2) is connected to a liquid accumulation pipe (21), the connection position between the liquid accumulation pipe (21) and the smoke inlet pipe (2) is exactly opposite to the smoke outlet end of the smoke inlet pipe (2), the bottom of the liquid accumulation pipe (21) is sealed and slidably provided with a liquid accumulation plate (22), a liquid accumulation spring (23) is provided 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 carry the solution flowing into the smoke inlet pipe (2), when the liquid level of the solution reaches the connection point 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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