A multi-stage adsorption desulfurization device for coal-fired flue gas

Abstract

The invention discloses a multi-stage adsorption desulfurization device for coal-fired flue gas, which comprises a base, a smoke inlet pipe, a slurry pipe, a smoke exhaust pipe, a slurry discharge pipe, a ring frame and a wet separation mechanism. The base is fixedly connected to the ring frame and the wet separation mechanism. The wet separation mechanism is fixedly connected to the smoke inlet pipe, the slurry pipe, the smoke exhaust pipe and the slurry discharge pipe. The ring frame and the wet separation mechanism are fixedly connected. The invention relates to the technical field of desulfurization towers. The invention uses wet desulfurization and multi-stage adsorption of sulfides to ensure that no residual sulfides exist in the exhaust flue gas, thereby improving the desulfurization efficiency of coal-fired flue gas.

Description

Technical Field

[0001] The invention relates to the technical field of desulfurization towers, in particular to a multi-stage adsorption desulfurization device for coal-fired flue gas. Background Art

[0002] There are generally three desulfurization methods: desulfurization before combustion, desulfurization during combustion, and desulfurization after combustion. With the development of industry and the improvement of people's living standards, the thirst for energy is also increasing. Sulfur dioxide in coal-fired flue gas has become the main cause of air pollution. Reducing sulfur dioxide pollution has become a top priority for today's atmospheric environmental governance. Many flue gas desulfurization processes have been widely used in industry, and they also have important practical significance for the treatment of exhaust gases from various boilers and incinerators.

[0003] The existing wet desulfurization tower mainly relies on the contact between lime slurry sprayed from the bottom and the sulfur-containing flue gas. The lime slurry reacts with the sulfide in the flue gas to form crystals, which are discharged along with the slurry. There is insufficient contact between the lime slurry and the flue gas, and part of the sulfur-containing flue gas is directly discharged. The reaction is insufficient, and part of the sulfide flue gas is wrapped by the rapidly generated crystals and discharged with the slurry. It is necessary to improve the flue gas desulfurization efficiency to ensure that the discharged flue gas does not contain sulfide components. Summary of the invention

[0004] The object of the present invention is to provide a multi-stage adsorption desulfurization device for coal-fired flue gas to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a multi-stage adsorption desulfurization device for coal-fired flue gas includes a base, a smoke inlet pipe, a slurry pipe, a smoke exhaust pipe, a slurry discharge pipe, a ring frame and a wet separation mechanism. The base is fixedly connected to the ring frame and the wet separation mechanism. The wet separation mechanism is fixedly connected to the smoke inlet pipe, the slurry pipe, the smoke exhaust pipe and the slurry discharge pipe. The ring frame and the wet separation mechanism are fixedly connected.

[0006] This desulfurization device is a wet desulfurization tower, which is used to absorb and remove sulfur dioxide in the flue gas generated by coal combustion, so as to avoid the flue gas containing sulfur dioxide from being directly discharged into the atmosphere. The coal-fired flue gas is introduced into the wet separation mechanism through the smoke inlet pipe, and the lime slurry is introduced into the wet separation mechanism through the slurry pipe. The coal-fired flue gas is sprayed with lime water to make the sulfur dioxide in the flue gas react with the lime water to form crystals. The crystals are mixed with lime slurry and discharged from the slurry discharge pipe, and the flue gas that has absorbed the sulfur dioxide is discharged from the exhaust pipe.

[0007] Furthermore, the wet separation mechanism includes a tank body and an inner tank, the tank body is fixedly connected to the base and the smoke exhaust pipe, the inner tank is fixedly connected to the base, the tank body is provided with a first slurry discharge port, a first smoke inlet, a first flange and a first slurry inlet, the inner tank is provided with a second slurry discharge port, a second smoke inlet, a second flange, a second slurry inlet and a smoke exhaust groove, the first slurry discharge port and the second slurry discharge port are both fixedly connected to the slurry discharge pipe, the first smoke inlet and the second smoke inlet are both fixedly connected to the smoke inlet pipe, the first flange and the second flange are both provided with several groups, the first flange is arranged on the side wall of the tank body and is linearly evenly distributed along the axis, several groups of second flanges are arranged on the side wall of the inner tank and is linearly evenly distributed along the axis, the first slurry inlet and the second slurry inlet are both fixedly connected to the slurry pipe, and the smoke exhaust groove is arranged on the bottom of the inner tank away from the slurry discharge pipe.

[0008] The lime slurry is connected to the spraying mechanism through the first slurry inlet and the second slurry inlet through the pipeline from the slurry pipe, and the coal-fired flue gas is passed into the inner tank through the first smoke inlet and the second smoke inlet from the smoke inlet pipe. The lime slurry is sprayed on the coal-fired flue gas, and the sulfur dioxide in the coal-fired flue gas is adsorbed to produce crystals. The sulfide crystals fall to the bottom of the inner tank along with the sprayed slurry and are discharged from the slurry discharge pipe through the first slurry discharge port and the second slurry discharge port. The sulfur-free flue gas passes through the smoke exhaust trough and is discharged into the smoke exhaust pipe from the gap between the tank body and the inner tank.

[0009] Furthermore, the wet separation mechanism also includes a spray mechanism, a partition mechanism, a moisture measuring mechanism, and a baffle. The spray mechanism, the partition mechanism, the moisture measuring mechanism, and the baffle are all fixedly connected to the inner tank, the spray mechanism and the partition mechanism are all fixedly connected to the ring frame, the spray mechanism and the partition mechanism are all rotatably connected to the first flange, the spray mechanism and the partition mechanism are all rotatably connected to the second flange, the partition mechanism and the moisture measuring mechanism are each provided with several groups, and several groups of partition mechanisms and moisture measuring mechanisms are linearly evenly distributed along the axis of the inner tank, the smoke exhaust trough is provided below the baffle, the inner tank, the spray mechanism, and the partition mechanism together form a primary spray chamber, and adjacent partition mechanisms and inner tanks together form a secondary spray chamber, the spray mechanism is connected to the slurry pipe through a pipeline, and the partition mechanism is connected to the moisture measuring mechanism through an electrical signal.

[0010] The lime slurry is connected to the spray mechanism through a pipeline, and the lime slurry is sprayed into the inner tank by the spray mechanism at the top. The spray mechanism and the partition mechanism near the top form a primary spray chamber. The lime slurry and the flue gas are mixed and sprayed in the primary spray chamber. Subsequently, the mixed liquid that has completed the preliminary adsorption and desulfurization passes through the partition mechanism near the top and enters the secondary spray chamber formed by the adjacent partition mechanism and the inner tank. The humidity measuring mechanism detects humidity conditions. When the humidity is lower than the standard value, the lime slurry and the flue gas are insufficiently mixed, and the crystal precipitation rate is insufficient. The partition mechanism adjusts the falling rate of the mixed liquid to make the lime slurry and the flue gas fully mixed to ensure the sulfide crystallization precipitation rate.

[0011] Furthermore, the spray mechanism includes a first motor, a mounting plate, a bevel gear head, a top plate, a main rod, a first gear rod, a transmission, a bottom cylinder and a nozzle mechanism. The first motor is fixedly connected to the ring frame, the output end of the first motor is fixedly connected to the bevel gear head, the output end of the first motor is rotatably connected to the first flange and the second flange, the mounting plate is fixedly connected to the inner tank, a center hole groove is provided on the mounting plate, the top plate is rotatably connected to the center hole groove, a bevel gear pair and a flower groove are provided on the top plate, the bevel gear head is meshed with the tooth surface of the bevel gear pair, the flower groove is fixedly connected to the transmission, the main rod and the first gear rod are both transmission-connected to the transmission, the main rod is rotatably connected to the inner tank, the bottom cylinder is fixedly connected to the top plate, a plurality of groups of first through holes are provided on the bottom cylinder, the first gear rod is transmission-connected to the nozzle mechanism, the nozzle mechanism is provided with a plurality of groups of first through holes, and the first through holes are rotatably connected to the nozzle mechanism.

[0012] The lime slurry is connected to the sprinkler mechanism through a pipeline, and the first motor outputs torque to the bevel gear head, which meshes with the tooth surface of the bevel gear pair on the top plate, so that the top plate rotates around the center of the mounting plate along the center hole groove, and the transmission is driven to rotate through the flower groove on the top plate, so that there is a differential between the first gear rod and the bottom cylinder. While the bottom cylinder itself rotates, the tooth surface of the first gear rod meshes with the sprinkler mechanism to change the spraying angle of the sprinkler mechanism.

[0013] Furthermore, the nozzle mechanism includes a second gear rod, a side frame, a crank, a square frame and a spray gun. The second gear rod is meshed with the tooth surface of the first gear rod, the second gear rod is rotatably connected to the first through hole, the side frame is fixedly connected to the bottom cylinder, the crank is rotatably connected to the first gear rod and the spray gun, the square frame is rotatably connected to the side frame and the spray gun, and the spray gun is connected to the slurry pipe through a pipeline.

[0014] The lime slurry is connected to the spray gun through a pipeline, and the tooth surface of the first gear rod engages the second gear rod, so that the second gear rod drives one end of the crank to rotate around its axis, and the crank is away from one end of the second gear rod and rotates around the spray gun. The spray gun is assembled on the side frame through a square frame rotation. When the crank rotates, the spray gun itself makes a spiral rotation to rotate the spray angle.

[0015] Furthermore, the partition mechanism includes a second motor, a ring shell, a third gear rod and a ring platform. The second motor is fixedly connected to the ring frame, the output end of the second motor is fixedly connected to the third gear rod, the third gear rod is rotatably connected to the first flange and the second flange, the ring shell is fixedly connected to the inner tank, the ring platform is slidably connected to the ring shell, an outer ring groove and an inner ring groove are provided on the ring platform, the outer ring groove is provided on the side wall of the ring platform away from the center of the circle, and the inner ring groove is provided on the side wall of the ring platform close to the center of the circle, the third gear rod is meshed with the tooth surface of the outer ring groove, and the second motor is connected to the humidity measuring mechanism through electrical signals.

[0016] The second motor adjusts the output torque to the third gear rod according to the electrical signal of the humidity measuring mechanism, and the third gear rod is meshed with the tooth surface of the outer ring tooth groove through the third gear rod, so that the third gear rod is transformed into a ring table that rotates around the axis of the ring shell, and the torque is transmitted through the rotation of the ring table.

[0017] Furthermore, the partition mechanism also includes a fourth gear rod and fan blades, a plurality of groups of second through holes are provided on the annular shell, and the plurality of groups of second through holes are evenly distributed along the circumference of the side wall of the annular shell, and a plurality of fourth gear rods and fan blades are provided, the fourth gear rod is meshed with the tooth surface of the inner ring tooth groove, the fourth gear rod is rotatably connected to the second through holes, and the fourth gear rod is fixedly connected to the fan blades.

[0018] The ring table rotates around the axis of the ring shell, meshes with the inner ring tooth surface through the fourth gear rod, transforms the rotation of the ring table into the fourth gear rod rotating around the axis of the second through hole, drives the blades to rotate through the fourth gear rod, and adjusts the gap between the blades to control the falling rate of the mixed liquid.

[0019] Furthermore, the humidity measuring mechanism includes an outer cylinder, a mounting frame, a cylinder, a push plate, a first one-way valve, a humidity electrode, an orifice plate and a second one-way valve. The outer cylinder is fixedly connected to the inner tank, the mounting frame is fixedly connected to the outer cylinder and the cylinder, the cylinder output end is fixedly connected to the push plate, the push plate is slidably connected to the outer cylinder, a plurality of groups of air holes are provided on the push plate, a plurality of groups of the first one-way valve are provided, the first one-way valve is fixedly connected to the air holes, the humidity electrode is fixedly connected to the outer cylinder, the orifice plate is fixedly connected to the outer cylinder and the second one-way valve, and the humidity electrode is connected to the second motor through electrical signals.

[0020] The cylinder first drives the push plate to slide along the outer cylinder away from the orifice plate. The outer cylinder generates negative pressure to push open the first one-way valve, and a part of the flue gas with increased sulfide water content passes through the air hole along the first one-way valve into the outer cylinder. The humidity of the mixed flue gas is detected by the humidity electrode. Then the cylinder pushes the push plate to slide along the outer cylinder toward the orifice plate to pressurize the mixed gas. The pressurized gas pushes open the second one-way valve and is discharged along the second one-way valve, ensuring that no sulfide gas will adhere to the humidity electrode for a long time, causing corrosion of the humidity electrode.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention designs a spray mechanism, the lime slurry is connected to the spray gun through a pipeline, the first motor outputs torque to the bevel gear head, and the bevel gear head meshes with the tooth surface of the bevel gear pair to make the top plate rotate along the center hole groove, and there is a differential speed between the first gear rod and the bottom cylinder due to the transmission, and the tooth surface of the first gear rod meshes with the second gear rod, so that the second gear rod drives the crank to rotate, and rotates around the spray gun away from one end of the second gear rod, and the spray gun is assembled on the side frame through the square frame rotation, and the spray gun itself makes a spiral rotation to spray in all directions without dead angles; the present invention designs a multi-stage adsorption baffle mechanism, the lime slurry and the flue gas are mixed and sprayed in the primary spray chamber, and then the liquid enters the secondary spray chamber. When the humidity is lower than the standard value, the lime slurry and the flue gas are insufficiently mixed, and the crystal precipitation rate is insufficient, the second motor outputs torque. The third gear rod is meshed with the tooth surface of the outer ring tooth groove through the third gear rod, and the ring table rotates around the axis of the ring shell. The fourth gear rod is meshed with the tooth surface of the inner ring tooth groove, and the fourth gear rod is converted to drive the fan blades to rotate, and the gap between the fan blades is adjusted to control the falling rate of the mixed liquid, so that the lime slurry and the flue gas are fully mixed to complete the multi-stage adsorption desulfurization; the present invention designs a humidity measuring mechanism, the cylinder first drives the push plate away, generates negative pressure to push open the first one-way valve, and the flue gas enters along the first one-way valve through the pore, and the humidity electrode detects the humidity of the mixed flue gas, and then the cylinder pushes the push plate close to the orifice plate, and the pressurized mixed gas pushes open the second one-way valve to be discharged, ensuring that no sulfide gas is attached to the humidity electrode for a long time, causing corrosion of the humidity electrode; the present invention uses wet desulfurization and multi-stage adsorption of sulfides to ensure that there is no residual sulfide in the discharged flue gas, thereby improving the desulfurization efficiency of coal-fired flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the wet separation mechanism of the present invention;

[0024] Figure 3 for Figure 2 A local enlarged schematic diagram of area A;

[0025] Figure 4 It is a partial cross-sectional view of the wet separation mechanism of the present invention;

[0026] Figure 5 It is a partial cross-sectional view of the spray mechanism of the present invention;

[0027] Figure 6 for Figure 5 A local enlarged schematic diagram of region B;

[0028] Figure 7 It is a schematic diagram of the structure of the partition mechanism of the present invention;

[0029] Figure 8It is a schematic diagram of the structure of the humidity measuring mechanism of the present invention.

[0030] In the figure: 1, base; 2, smoke inlet pipe; 3, slurry pipe; 4, smoke exhaust pipe; 5, slurry discharge pipe; 6, ring frame; 7, wet separation mechanism; 71, tank body; 711, first slurry discharge port; 712, first smoke inlet; 713, first flange; 714, first slurry inlet; 72, inner tank; 721, second slurry discharge port; 722, second smoke inlet; 723, second flange; 724, second slurry inlet; 725, smoke exhaust slot; 73, spray mechanism; 731, first motor; 732, mounting plate; 7321, center hole slot; 733, bevel gear head; 734, top plate; 7341, bevel gear pair; 7342, flower slot; 735, main rod; 736, first gear rod; 737, transmission; 738, bottom cylinder; 7381, first pass hole; 739, nozzle mechanism; 7391, second gear rod; 7392, side frame; 7393, crank; 7394, frame; 7395, spray gun; 74, partition mechanism; 741, second motor; 742, ring shell; 7421, second through hole; 743, third gear rod; 744, ring stage; 7441, outer ring tooth groove; 7442, inner ring tooth groove; 745, fourth gear rod; 746, fan blade; 75, humidity measuring mechanism; 751, outer cylinder; 752, mounting frame; 753, cylinder; 754, push plate; 7541, air hole; 755, first one-way valve; 756, humidity electrode; 757, orifice plate; 758, second one-way valve; 76, baffle; 77, primary spray chamber; 78, secondary spray chamber. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1 As shown, the present invention provides a technical solution of a multi-stage adsorption desulfurization device for coal-fired flue gas, including a base 1, a smoke inlet pipe 2, a slurry pipe 3, a smoke exhaust pipe 4, a slurry discharge pipe 5, a ring frame 6 and a wet separation mechanism 7. The base 1 is fixedly connected to the ring frame 6 and the wet separation mechanism 7. The wet separation mechanism 7 is fixedly connected to the smoke inlet pipe 2, the slurry pipe 3, the smoke exhaust pipe 4, and the slurry discharge pipe 5. The ring frame 6 and the wet separation mechanism 7 are fixedly connected.

[0033] This desulfurization device is a wet desulfurization tower, which is used to absorb and remove sulfur dioxide in the flue gas generated by coal combustion, so as to prevent the flue gas containing sulfur dioxide from being directly discharged into the atmospheric environment. The coal-fired flue gas is introduced into the wet separation mechanism 7 through the smoke inlet pipe 2, and the lime slurry is introduced into the wet separation mechanism 7 through the slurry pipe 3. The coal-fired flue gas is sprayed with lime water, so that the sulfur dioxide in the flue gas reacts with the lime water to form crystals. The crystals are mixed with the lime slurry and discharged from the slurry discharge pipe 5, and the flue gas that has absorbed the sulfur dioxide is discharged from the smoke exhaust pipe 4.

[0034] like Figure 2 , Figure 3 As shown, the wet separation mechanism 7 includes a tank body 71 and an inner tank 72. The tank body 71 is fixedly connected to the base 1 and the smoke exhaust pipe 4. The inner tank 72 is fixedly connected to the base 1. The tank body 71 is provided with a first pulp discharge port 711, a first smoke inlet 712, a first flange 713 and a first pulp inlet 714. The inner tank 72 is provided with a second pulp discharge port 721, a second smoke inlet 722, a second flange 723, a second pulp inlet 724 and a smoke exhaust groove 725. The first pulp discharge port 711, the second pulp discharge port 721 They are both fixedly connected to the slurry discharge pipe 5, the first smoke inlet 712 and the second smoke inlet 722 are both fixedly connected to the smoke inlet pipe 2, the first flange 713 and the second flange 723 are each provided with several groups, the first flange 713 is arranged on the side wall of the tank body 71 and is linearly evenly distributed along the axis, several groups of second flanges 723 are arranged on the side wall of the inner tank 72 and are linearly evenly distributed along the axis, the first slurry inlet 714 and the second slurry inlet 724 are both fixedly connected to the slurry pipe 3, and the smoke exhaust groove 725 is arranged on the side of the bottom of the inner tank 72 away from the slurry discharge pipe 5.

[0035] The lime slurry is connected to the spray mechanism 73 through the first slurry inlet 714 and the second slurry inlet 724 through the pipeline from the slurry pipe 3. The coal-fired flue gas is passed into the inner tank 72 from the smoke inlet pipe 2 through the first smoke inlet 712 and the second smoke inlet 722. The lime slurry is sprayed on the coal-fired flue gas, adsorbing the sulfur dioxide in the coal-fired flue gas to produce crystals. The sulfide crystals fall to the bottom of the inner tank 72 along with the sprayed slurry and are discharged from the slurry discharge pipe 5 through the first slurry discharge port 711 and the second slurry discharge port 721. The sulfur-free flue gas passes through the smoke exhaust trough 725 and is discharged into the smoke exhaust pipe 4 from the gap between the tank body 71 and the inner tank 72.

[0036] like Figure 2 , Figure 4 , Figure 7As shown, the wet separation mechanism 7 also includes a spray mechanism 73, a partition mechanism 74, a moisture measuring mechanism 75, and a baffle 76. The spray mechanism 73, the partition mechanism 74, the moisture measuring mechanism 75, and the baffle 76 are all fixedly connected to the inner tank 72, the spray mechanism 73 and the partition mechanism 74 are all fixedly connected to the ring frame 6, the spray mechanism 73 and the partition mechanism 74 are all rotatably connected to the first flange 713, the spray mechanism 73 and the partition mechanism 74 are all rotatably connected to the second flange 723, and the partition mechanism 75 is fixedly connected to the inner tank 72. The mechanism 74 and the moisture measuring mechanism 75 are each provided with several groups, and the several groups of partition mechanisms 74 and moisture measuring mechanisms 75 are linearly evenly distributed along the axis of the inner tank 72. The smoke exhaust groove 725 is arranged below the baffle plate 76. The inner tank 72, the spray mechanism 73, and the partition mechanism 74 together form a primary spray chamber 77, and the adjacent partition mechanisms 74 and the inner tank 72 together form a secondary spray chamber 78. The spray mechanism 73 is connected to the slurry pipe 3 through a pipeline, and the partition mechanism 74 is connected to the moisture measuring mechanism 75 through an electrical signal.

[0037] The lime slurry is connected to the spray mechanism 73 through a pipeline, and the lime slurry is sprayed into the inner tank 72 by the spray mechanism 73 at the top. The spray mechanism 73 and the partition mechanism 74 near the top are combined to form a primary spray chamber 77. The lime slurry and the flue gas are mixed and sprayed in the primary spray chamber 77, and then the mixed liquid that has completed the preliminary adsorption desulfurization passes through the partition mechanism 74 near the top and enters the secondary spray chamber 78 formed by the adjacent partition mechanism 74 and the inner tank 72. The humidity measuring mechanism 75 detects humidity conditions. When the humidity is lower than the standard value, the lime slurry and the flue gas are insufficiently mixed, and the crystal precipitation rate is insufficient. The partition mechanism 74 adjusts the falling rate of the mixed liquid to make the lime slurry and the flue gas fully mixed to ensure the sulfide crystallization precipitation rate.

[0038] like Figure 5As shown, the spray mechanism 73 includes a first motor 731, a mounting plate 732, a bevel gear head 733, a top plate 734, a main rod 735, a first gear rod 736, a transmission 737, a bottom cylinder 738 and a spray head mechanism 739. The first motor 731 is fixedly connected to the ring frame 6, the output end of the first motor 731 is fixedly connected to the bevel gear head 733, the output end of the first motor 731 is rotatably connected to the first flange 713 and the second flange 723, the mounting plate 732 is fixedly connected to the inner tank 72, the mounting plate 732 is provided with a center hole groove 7321, and the top plate 734 is rotatably connected to the center hole groove 7321. The top plate 734 is provided with a bevel gear pair 7341 and a flower groove 7342, the bevel gear head 733 is meshed with the tooth surface of the bevel gear pair 7341, the flower groove 7342 is fixedly connected to the transmission 737, the main rod 735 and the first gear rod 736 are both transmission-connected to the transmission 737, the main rod 735 is rotationally connected to the inner tank 72, the bottom cylinder 738 is fixedly connected to the top plate 734, the bottom cylinder 738 is provided with a plurality of groups of first through holes 7381, the first gear rod 736 is transmission-connected to the nozzle mechanism 739, the nozzle mechanism 739 is provided with a plurality of groups, and the first through holes 7381 are rotationally connected to the nozzle mechanism 739.

[0039] The lime slurry is connected to the nozzle mechanism 739 through a pipeline, and the first motor 731 outputs torque to the bevel gear head 733. The bevel gear head 733 engages with the tooth surface of the bevel gear pair 7341 on the top plate 734, so that the top plate 734 rotates around the center of the mounting plate 732 along the center hole groove 7321, and the flower groove 7342 on the top plate 734 drives the transmission 737 to rotate, so that there is a differential between the first gear rod 736 and the bottom cylinder 738. While the bottom cylinder 738 itself rotates, the tooth surface of the first gear rod 736 engages with the nozzle mechanism 739, so that the spraying angle of the nozzle mechanism 739 changes.

[0040] like Figure 6 As shown, the nozzle mechanism 739 includes a second gear rod 7391, a side frame 7392, a crank 7393, a square frame 7394 and a spray gun 7395. The second gear rod 7391 is meshed with the tooth surface of the first gear rod 736, the second gear rod 7391 is rotatably connected to the first through hole 7381, the side frame 7392 is fixedly connected to the bottom cylinder 738, the crank 7393 is rotatably connected to the first gear rod 736 and the spray gun 7395, the square frame 7394 is rotatably connected to the side frame 7392 and the spray gun 7395, and the spray gun 7395 is connected to the slurry pipe 3 through a pipeline.

[0041] The lime slurry is connected to the spray gun 7395 through a pipeline, and the tooth surface of the first gear rod 736 engages with the second gear rod 7391, so that the second gear rod 7391 drives one end of the crank 7393 to rotate around its axis, and the crank 7393 rotates around the spray gun 7395 away from the end of the second gear rod 7391. The spray gun 7395 is rotatably assembled on the side frame 7392 through the square frame 7394. When the crank 7393 rotates, the spray gun 7395 itself rotates in a spiral manner to rotate the spray angle.

[0042] like Figure 7 As shown, the partition mechanism 74 includes a second motor 741, a ring shell 742, a third gear rod 743 and a ring platform 744, the second motor 741 is fixedly connected to the ring frame 6, the output end of the second motor 741 is fixedly connected to the third gear rod 743, the third gear rod 743 is rotatably connected to the first flange 713 and the second flange 723, the ring shell 742 is fixedly connected to the inner tank 72, the ring platform 744 is slidably connected to the ring shell 742, an outer ring groove 7441 and an inner ring groove 7442 are provided on the ring platform 744, the outer ring groove 7441 is arranged on the side wall of the ring platform 744 away from the center of the circle, the inner ring groove 7442 is arranged on the side wall of the ring platform 744 close to the center of the circle, the third gear rod 743 is meshed with the tooth surface of the outer ring groove 7441, and the second motor 741 is connected to the humidity measuring mechanism 75 through electrical signals.

[0043] The second motor 741 adjusts the output torque to the third gear rod 743 according to the electrical signal of the humidity measuring mechanism 75, and the third gear rod 743 is meshed with the tooth surface of the outer ring tooth groove 7441 to transform the third gear rod 743 into a ring table 744 that rotates around the axis of the ring shell 742, and the torque is transmitted through the rotation of the ring table 744.

[0044] like Figure 7 As shown, the partition mechanism 74 also includes a fourth gear rod 745 and a fan blade 746. A plurality of groups of second through holes 7421 are provided on the annular shell 742. The plurality of groups of second through holes 7421 are evenly distributed along the circumference of the side wall of the annular shell 742. A plurality of groups of fourth gear rods 745 and fan blades 746 are provided. The fourth gear rod 745 is meshed with the tooth surface of the inner ring tooth groove 7442. The fourth gear rod 745 is rotatably connected to the second through holes 7421. The fourth gear rod 745 is fixedly connected to the fan blade 746.

[0045] The ring stage 744 rotates around the axis of the ring shell 742, and meshes with the tooth surface of the inner ring tooth groove 7442 through the fourth gear rod 745, thereby transforming the rotation of the ring stage 744 into the fourth gear rod 745 rotating around the axis of the second through hole 7421, and the fan blades 746 are driven to rotate through the fourth gear rod 745, and the gap between the fan blades 746 is adjusted to control the falling rate of the mixed liquid.

[0046] like Figure 8As shown, the humidity measuring mechanism 75 includes an outer cylinder 751, a mounting frame 752, a cylinder 753, a push plate 754, a first one-way valve 755, a humidity electrode 756, an orifice plate 757 and a second one-way valve 758. The outer cylinder 751 is fixedly connected to the inner tank 72, the mounting frame 752 is fixedly connected to the outer cylinder 751 and the cylinder 753, the output end of the cylinder 753 is fixedly connected to the push plate 754, the push plate 754 is slidably connected to the outer cylinder 751, a plurality of groups of air holes 7541 are provided on the push plate 754, a plurality of groups of the first one-way valve 755 are provided, the first one-way valve 755 is fixedly connected to the air holes 7541, the humidity electrode 756 is fixedly connected to the outer cylinder 751, the orifice plate 757 is fixedly connected to the outer cylinder 751 and the second one-way valve 758, and the humidity electrode 756 is connected to the second motor 741 through electrical signals.

[0047] The cylinder 753 first drives the push plate 754 to slide along the outer cylinder 751 in the direction away from the orifice plate 757. The outer cylinder 751 generates negative pressure to push open the first one-way valve 755, and a part of the flue gas with increased sulfide water content passes through the air hole 7541 along the first one-way valve 755 into the outer cylinder 751. The humidity of the mixed flue gas is detected by the humidity electrode 756. Then the cylinder 753 pushes the push plate 754 to slide along the outer cylinder 751 in the direction close to the orifice plate 757 to pressurize the mixed gas. The pressurized gas pushes open the second one-way valve 758 and is discharged along the second one-way valve 758, ensuring that no sulfide gas will adhere to the humidity electrode 756 for a long time to cause corrosion of the humidity electrode 756.

[0048] Working principle of the present invention: The desulfurization device is used to absorb and remove sulfur dioxide in the flue gas generated by coal combustion to avoid direct discharge of sulfur-containing flue gas. The coal-fired flue gas is introduced into the inner tank 72 through the smoke inlet pipe 2, and the lime slurry is connected to the spray gun 7395 through the slurry pipe 3. The first motor 731 outputs torque to the bevel gear head 733, which meshes with the tooth surface of the bevel gear pair 7341 on the top plate 734 through the bevel gear head 733. The top plate 734 rotates along the center hole groove 7321, and drives the transmission 737 to rotate through the flower groove 7342. The first gear rod 736 and the bottom cylinder 738 have a differential speed due to the transmission 737. When the bottom cylinder 738 rotates, the tooth surface of the first gear rod 736 meshes with the second gear rod 7391, so that the second gear rod 7391 drives one end of the crank 7393 to rotate around its axis, and the end away from the second gear rod 7391 is equipped with a spray gun 7395 to rotate. The spray gun 7395 is rotated and assembled on the side frame 7392 through the square frame 7394. When the crank 7393 rotates, the spray gun 7395 itself rotates in a spiral manner, changing the The lime slurry and the flue gas are mixed and sprayed in the primary spray chamber 77, and then the mixed liquid that has completed the preliminary adsorption and desulfurization enters the secondary spray chamber 78. The humidity measuring mechanism 75 detects the humidity. When the humidity is lower than the standard value, the lime slurry and the flue gas are not mixed enough, and the crystal precipitation rate is insufficient. The second motor 741 adjusts the output torque to the third gear rod 743 according to the electrical signal of the humidity measuring mechanism 75, and the third gear rod 743 is meshed with the tooth surface of the outer ring tooth groove 7441, and the ring stage 744 is around the ring shell 742. The axis rotates, the fourth gear rod 745 meshes with the tooth surface of the inner ring tooth groove 7442, and the ring table 744 is transformed into the fourth gear rod 745 rotating around the axis of the second through hole 7421, and the fan blades 746 are driven to rotate by the fourth gear rod 745, and the gap between the fan blades 746 is adjusted to control the falling rate of the mixed liquid, so that the lime slurry and the flue gas are fully mixed, completing the multi-stage adsorption desulfurization and ensuring the sulfide crystallization precipitation rate. The crystals mixed with the lime slurry are discharged from the slurry discharge pipe 5, and the flue gas that has adsorbed sulfur dioxide is discharged from the smoke exhaust pipe 4.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A multi-stage adsorption desulfurization device for coal-fired flue gas, characterized in that: The desulfurization device comprises a base (1), a smoke inlet pipe (2), a slurry pipe (3), a smoke exhaust pipe (4), a slurry discharge pipe (5), a ring frame (6) and a wet separation mechanism (7); the base (1) is fixedly connected to the ring frame (6) and the wet separation mechanism (7); the wet separation mechanism (7) is fixedly connected to the smoke inlet pipe (2), the slurry pipe (3), the smoke exhaust pipe (4) and the slurry discharge pipe (5); and the ring frame (6) and the wet separation mechanism (7) are fixedly connected; The wet separation mechanism (7) comprises a tank body (71) and an inner tank (72); the tank body (71) is fixedly connected to the base (1) and the smoke exhaust pipe (4); the inner tank (72) is fixedly connected to the base (1); the tank body (71) is provided with a first pulp discharge port (711), a first smoke inlet (712), a first flange (713) and a first pulp inlet (714); the inner tank (72) is provided with a second pulp discharge port (721), a second smoke inlet (722), a second flange (723), a second pulp inlet (724) and a smoke exhaust groove (725); the first pulp discharge port (711), the second pulp discharge port (712), the second smoke inlet (712), the second flange (723), the second pulp inlet (724) and a smoke exhaust groove (725); 21) are fixedly connected to the slurry discharge pipe (5), the first smoke inlet (712) and the second smoke inlet (722) are fixedly connected to the smoke inlet pipe (2), the first flange (713) and the second flange (723) are provided in a plurality of groups, the first flange (713) is arranged on the side wall of the tank body (71) and is linearly evenly distributed along the axis, and a plurality of groups of the second flanges (723) are arranged on the side wall of the inner tank (72) and are linearly evenly distributed along the axis, the first slurry inlet (714) and the second slurry inlet (724) are fixedly connected to the slurry pipe (3), and the smoke exhaust groove (725) is arranged on the bottom of the inner tank (72) on a side away from the slurry discharge pipe (5); The wet separation mechanism (7) further comprises a spray mechanism (73), a baffle mechanism (74), a moisture measuring mechanism (75), and a baffle (76); the spray mechanism (73), the baffle mechanism (74), the moisture measuring mechanism (75), and the baffle (76) are all fixedly connected to the inner tank (72); the spray mechanism (73) and the baffle mechanism (74) are all fixedly connected to the ring frame (6); the spray mechanism (73) and the baffle mechanism (74) are all rotatably connected to the first flange (713); the spray mechanism (73) and the baffle mechanism (74) are all rotatably connected to the second flange (723); and the baffle (76) is fixedly connected to the inner tank (72); The mechanism (74) and the moisture measuring mechanism (75) are provided in a plurality of groups. The plurality of groups of the partition mechanism (74) and the moisture measuring mechanism (75) are linearly and evenly distributed along the axis of the inner tank (72). The smoke exhaust groove (725) is arranged below the baffle plate (76). The inner tank (72), the spray mechanism (73) and the partition mechanism (74) together form a primary spray chamber (77). The adjacent partition mechanisms (74) and the inner tank (72) together form a secondary spray chamber (78). The spray mechanism (73) is connected to the slurry pipe (3) through a pipeline. The partition mechanism (74) and the moisture measuring mechanism (75) are connected to each other through an electrical signal. The humidity measuring mechanism (75) detects humidity conditions. When the humidity is lower than the standard value, the lime slurry and the flue gas are not mixed enough, and the crystal precipitation rate is insufficient. The partition mechanism (74) adjusts and controls the falling rate of the mixed liquid to make the lime slurry and the flue gas fully mixed, thereby ensuring the sulfide crystal precipitation rate.

2. A multi-stage adsorption desulfurization device for coal-fired flue gas according to claim 1, characterized in that: The spray mechanism (73) comprises a first motor (731), a mounting plate (732), a bevel gear head (733), a top plate (734), a main rod (735), a first gear rod (736), a transmission (737), a bottom cylinder (738) and a spray head mechanism (739), wherein the first motor (731) is fixedly connected to the ring frame (6), an output end of the first motor (731) is fixedly connected to the bevel gear head (733), an output end of the first motor (731) is rotatably connected to both the first flange (713) and the second flange (723), the mounting plate (732) is fixedly connected to the inner tank (72), a center hole groove (7321) is provided on the mounting plate (732), and the top plate (734) is rotatably connected to the center hole groove (7321). The top plate (734) is provided with a bevel gear pair (7341) and a flower groove (7342); the bevel gear head (733) meshes with the tooth surface of the bevel gear pair (7341); the flower groove (7342) is fixedly connected to the transmission (737); the main rod (735) and the first gear rod (736) are both transmission-connected to the transmission (737); the main rod (735) is rotationally connected to the inner tank (72); the bottom cylinder (738) is fixedly connected to the top plate (734); the bottom cylinder (738) is provided with a plurality of groups of first through holes (7381); the first gear rod (736) is transmission-connected to the nozzle mechanism (739); the nozzle mechanism (739) is provided with a plurality of groups; and the first through holes (7381) are rotationally connected to the nozzle mechanism (739).

3. A multi-stage adsorption desulfurization device for coal-fired flue gas according to claim 2, characterized in that: The spray head mechanism (739) comprises a second gear rod (7391), a side frame (7392), a crank (7393), a square frame (7394) and a liquid spray gun (7395); the second gear rod (7391) is meshed with the tooth surface of the first gear rod (736); the second gear rod (7391) is rotatably connected to the first through hole (7381); the side frame (7392) is fixedly connected to the bottom cylinder (738); the crank (7393) is rotatably connected to the first gear rod (736) and the liquid spray gun (7395); the square frame (7394) is rotatably connected to the side frame (7392) and the liquid spray gun (7395); and the liquid spray gun (7395) is connected to the slurry pipe (3) via a pipeline.

4. The multi-stage adsorption desulfurization device for coal-fired flue gas according to claim 1 is characterized in that: The partition mechanism (74) comprises a second motor (741), an annular shell (742), a third gear rod (743) and an annular platform (744); the second motor (741) is fixedly connected to the annular frame (6); the output end of the second motor (741) is fixedly connected to the third gear rod (743); the third gear rod (743) is rotatably connected to the first flange (713) and the second flange (723); the annular shell (742) is fixedly connected to the inner tank (72); the annular platform (744) is fixedly connected to the inner tank (72); (744) is slidably connected to the ring shell (742), the ring platform (744) is provided with an outer ring tooth groove (7441) and an inner ring tooth groove (7442), the outer ring tooth groove (7441) is provided on the side wall of the ring platform (744) away from the center of the circle, and the inner ring tooth groove (7442) is provided on the side wall of the ring platform (744) close to the center of the circle, the third gear rod (743) is meshed with the tooth surface of the outer ring tooth groove (7441), and the second motor (741) is connected to the humidity measuring mechanism (75) via an electrical signal.

5. A multi-stage adsorption desulfurization device for coal-fired flue gas according to claim 4, characterized in that: The partition mechanism (74) further comprises a fourth gear rod (745) and a fan blade (746); the annular shell (742) is provided with a plurality of groups of second through holes (7421); the plurality of groups of second through holes (7421) are evenly distributed along the circumference of the side wall of the annular shell (742); the fourth gear rod (745) and the fan blade (746) are both provided with a plurality of groups; the fourth gear rod (745) is meshed with the tooth surface of the inner ring tooth groove (7442); the fourth gear rod (745) is rotatably connected to the second through holes (7421); and the fourth gear rod (745) is fixedly connected to the fan blade (746).

6. A multi-stage adsorption desulfurization device for coal-fired flue gas according to claim 4, characterized in that: The humidity measuring mechanism (75) comprises an outer cylinder (751), a mounting frame (752), a cylinder (753), a push plate (754), a first one-way valve (755), a humidity electrode (756), an orifice plate (757) and a second one-way valve (758); the outer cylinder (751) is fixedly connected to the inner tank (72); the mounting frame (752) is fixedly connected to the outer cylinder (751) and the cylinder (753); the output end of the cylinder (753) is fixedly connected to the push plate (754); the push plate (75 4) is slidably connected to the outer cylinder (751), the push plate (754) is provided with a plurality of groups of air holes (7541), the first one-way valve (755) is provided with a plurality of groups, the first one-way valve (755) is fixedly connected to the air holes (7541), the humidity electrode (756) is fixedly connected to the outer cylinder (751), the orifice plate (757) is fixedly connected to the outer cylinder (751) and the second one-way valve (758), and the humidity electrode (756) is connected to the second motor (741) via an electrical signal.

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