Jet device for calcium-based dry desulfurization

Abstract

The invention relates to a spraying device for calcium-based dry desulfurization, which relates to the technical field of spraying, and comprises a feeding bin, a first material guiding cylinder and a second material guiding cylinder are respectively arranged on the top and the outer side of the feeding bin, a first bin door is arranged in the feeding bin, a second bin door is arranged in the second material guiding cylinder, and an intermittent control mechanism is arranged on the outer side of the feeding bin; a first negative pressure bin is installed on the inner side of the feeding bin, a second negative pressure bin is installed at the bottom of the first negative pressure bin, a third bin door and a fourth bin door which are opened and closed at the same time are arranged at the top of the first negative pressure bin, a spraying barrel is installed at the bottom of the second negative pressure bin, and an air supply pipe a, an air supply pipe b and an air supply pipe a which are symmetrically arranged are installed on the side portion of the spraying barrel. On one hand, the generation basis of an acid liquid film is thoroughly broken up, so that the pitting corrosion rate of the flue is reduced, and the flue is prevented from being damaged; and on the other hand, a reaction chain for catalyzing dioxin synthesis by chloride ions is fundamentally cut off, so that pollution discharge is controlled all the time, and the phenomenon of secondary pollution is completely eradicated.

Description

TECHNICAL FIELD

[0001] The application relates to the field of spraying technology, and discloses a spraying device for calcium-based dry desulfurization. BACKGROUND

[0002] The calcium-based dry desulfurization technology is a clean flue gas purification process without water participation, and the core of the technology is to directly remove sulfur dioxide by using high-activity calcium-based compounds through the synergistic effect of physical adsorption and chemical reaction; in the calcium-based dry desulfurization technology, the desulfurizer is precisely sprayed into a flue reaction zone through a high-pressure pneumatic conveying system, realizes rapid diffusion under the action of turbulent flow and is fully mixed with flue gas, the desulfurizer efficiently adsorbs SO2 by virtue of a large specific surface area, and completes the sulfur fixation conversion through multistage chemical reactions. The calcium-based dry desulfurization system is composed of three core units, namely, an intelligent spraying system, a flue reaction zone for strengthening turbulent flow mixing and a high-efficiency bag-type dust collector.

[0003] The spraying device is the core driving unit of the calcium-based dry desulfurization technology, high-activity desulfurizer is precisely sprayed into a flue through high-pressure pneumatic conveying, and the desulfurizer is mixed with flue gas in a sub-second level through a turbulent flow field, so as to provide a reaction kinetics basis for the adsorption and chemical conversion of SO2. The utility model with the authorized publication number CN220126585U discloses a desulfurization spraying powder feeding device, the prior art is connected with a powder bin on a mixing chamber, a load ring plate is arranged on the bin, a spiral material plate is arranged on the inner wall of the chamber, an expansion joint is arranged at the bottom of the powder bin, a retaining ring is arranged at the outer edge of the load ring plate, and an automatic powder falling device can be further arranged in the bin. When the above prior art works, high-pressure water enters the mixing chamber to generate negative pressure to adsorb lime powder, and the lime powder is sprayed out after being fully mixed with water through spiral movement.

[0004] The above-mentioned injection powder device needs to be powered by water, and the injection powder function can be realized under the premise of sufficient mixing; since calcium-based dry desulfurization does not require water participation, if the above-mentioned device is used, the injection speed of the desulfurizer will be difficult to achieve the requirement of covering the entire flue cross section, resulting in too high or too low local concentration of the desulfurizer, which cannot achieve efficient and stable desulfurization. In order to adapt to the calcium-based dry desulfurization process, the intelligent injection system usually uses air compressor blowing equipment to control the inflow and outflow of the desulfurizer by using high-speed airflow; in order to improve the reaction activity of the desulfurizer in a low-temperature environment, it is necessary to add a chlorine-based additive (calcium chloride, hydrochloric acid, etc.) to the desulfurizer. At present, most production enterprises inject desulfurizer and chlorine-based additive at the same time, so that under the action of high-speed airflow, the desulfurizer and chlorine-based additive are injected into the flue reaction zone at the same time, thereby completing the desulfurization operation of the flue gas. The above-mentioned prior art often causes the chlorine-based additive and the desulfurizer to be distributed separately; on the one hand, the chlorine-based additive that has not been dispersed in time is easily corroded by moisture in the flue, which causes the local pitting rate of the injection device and the flue wall to exceed the expected range, resulting in damage to the flue; on the other hand, part of the aggregated chlorine-based additive is easily decomposed into HCl gas in the local high-temperature area of the flue, and secondly, some Cl - clusters are easy to catalyze dioxin generation in the 250-400℃ window, and the escape of the above-mentioned HCl gas and the deposition of dioxin cause the secondary pollution of the injection device to be out of control; therefore, the injection device in the existing calcium-based dry desulfurization process technology has many technical drawbacks. SUMMARY

[0005] In view of the problems that the existing calcium-based dry desulfurization process technology has a flue pitting rate exceeding the expectation and secondary pollution easily out of control when injecting desulfurizer and chlorine-based additive, the present application provides a calcium-based dry desulfurization injection device.

[0006] To solve the above-mentioned problems, the present application provides the following technical solutions: A calcium-based dry desulfurization injection device includes a feeding hopper. A first feed cylinder for introducing desulfurizing agent is installed at the top of the feeding hopper, and a second feed cylinder for introducing chlorine-based additives is installed on the outside of the feeding hopper. A first door is provided inside the feeding hopper to control the connection between the inner cavity of the feeding hopper and the first feed cylinder. A second door is provided inside the second feed cylinder to control the connection between the second feed cylinder and the inner cavity of the feeding hopper. An intermittent control mechanism is provided on the outside of the feeding hopper to simultaneously control the intermittent opening and closing of the first and second door, allowing the chlorine-based additives and desulfurizing agent to enter the inner cavity of the feeding hopper sequentially. The inner side of the feeding hopper is equipped with... The device is equipped with a first negative pressure chamber, the inner cavity of which is connected to the inner cavity of the feeding chamber. A second negative pressure chamber is installed at the bottom of the first negative pressure chamber. The first and second negative pressure chambers are used to draw in and accelerate the flow rate of desulfurizing agent and chlorine-based additives. The top of the first negative pressure chamber is provided with a third and a fourth chamber door that open and close simultaneously. The bottom of the second negative pressure chamber is equipped with a spray cylinder. Symmetrically arranged air supply pipes a and b are installed on the side of the spray cylinder. The air supply pipes a and b are used to introduce high-speed airflow to the top of the spray cylinder, so as to generate a high-speed vortex in the inner cavity of the spray cylinder and spray the desulfurizing agent and chlorine-based additives at high speed from the outlet at the bottom of the spray cylinder.

[0007] Preferably, the intermittent control mechanism includes a first rotating rod and a second rotating rod, which are respectively fastened to a first bin door and a second bin door. The first rotating rod and the second rotating rod are arranged perpendicularly. A support frame is fixedly installed on the outside of the feeding bin. The support frame is arranged above the second feeding cylinder. A rotatable first intermediate support rod is provided inside the support frame. The first intermediate support rod is driven and arranged parallel to the first rotating rod. A hoisting frame is fixedly installed inside the support frame. A second intermediate support rod is rotatably installed inside the hoisting frame. The second intermediate support rod is rotatably connected with both the first intermediate support rod and the second rotating rod, and the second intermediate support rod is arranged perpendicularly to both the first intermediate support rod and the second rotating rod.

[0008] Preferably, two symmetrically arranged first sealed bearings are fixedly installed on the inner and outer sides of the feeding hopper, and the inner and outer ends of the first rotating rod are respectively rotatably engaged with the two first sealed bearings. A second sealed bearing is fixedly installed on the outer side of the feeding hopper, and one inner end of the first central support rod is rotatably engaged with the second sealed bearing. One outer end of the first central support rod is rotatably engaged with the support frame. Two symmetrically arranged third sealed bearings are fixedly installed on the upper and lower sides of the second feeding cylinder, and the upper and lower ends of the second rotating rod are respectively rotatably engaged with the two third sealed bearings. Two symmetrically arranged bearing seats are fixedly installed on both sides of the hoisting frame, and the two ends of the second central support rod are respectively rotatably engaged with the two bearing seats.

[0009] Preferably, a first plate and a second plate are fixedly installed sequentially from the inside to the outside of the outer end of the first rotating rod. The first plate and the second plate are both arranged perpendicular to the first rotating rod. A transmission wheel is fixedly fitted around the outer periphery of the first middle support rod. The transmission wheel is arranged in the same vertical plane as the first plate. An angled opening is provided on the transmission wheel. The angle of the angled opening is °. One side edge of the angled opening can touch the first plate. A transmission column is provided on the outer side of the other side edge of the angled opening and is tightly connected to the transmission wheel. The transmission column is arranged parallel to the first middle support rod. The side wall of the transmission column can touch the second plate.

[0010] Preferably, a first bevel gear is fixedly installed at the outer end of the first intermediate support rod, and a second bevel gear and a third bevel gear are fixedly installed at both ends of the second intermediate support rod, respectively. The second bevel gear meshes with the first bevel gear. A fourth bevel gear is fixedly installed at the upper end of the second rotating rod, and the third bevel gear meshes with the fourth bevel gear. A first motor bracket is fixedly installed at the top of the support frame, and a first motor is fixedly installed inside the first motor bracket. The output shaft of the first motor is connected to the second intermediate support rod via a belt drive.

[0011] Preferably, a powder feeder is fixedly installed on the side of the first negative pressure chamber. The powder feeder is connected to a first powder outlet pipe and a second powder outlet pipe. The powder outlet of the first powder outlet pipe is connected to the inner cavity of the feeding hopper. The first powder outlet pipe is used to convey fly ash into the feeding hopper. The powder outlet of the second powder outlet pipe is connected to the inner cavity of the first negative pressure chamber. The second powder outlet pipe is used to convey nano-SiO2 powder into the first negative pressure chamber.

[0012] Preferably, an impeller cover is rotatably installed inside the first negative pressure chamber, and a second motor is fixedly installed on the outside of the first negative pressure chamber, with the output shaft of the second motor being tightly connected to the impeller cover; a pressure sensor is fixedly installed on the top of the first negative pressure chamber, and the pressure sensor is used to extract the pressure parameters inside the first negative pressure chamber.

[0013] Preferably, a folding plate is fixedly connected between the third and fourth compartment doors. A third and fourth rotating rod are rotatably mounted on the top of the second negative pressure chamber, and the third and fourth rotating rods are respectively fastened to the third and fourth compartment doors. A fourth and fifth sealed bearing are fastened to the side of the second negative pressure chamber, and the two ends of the third and fourth rotating rods are rotatably engaged with the fourth and fifth sealed bearings, respectively. Sleeves are installed on the outer ends of both the third and fourth rotating rods, and through slots are formed on both sleeves. A connecting rod is provided between the two sleeves, and two sleeve rods, both perpendicular to the connecting rod, are fitted onto the outer wall of the connecting rod, with the two sleeve rods slidingly engaged with the two through slots. A second motor bracket is fixedly mounted on the side of the second negative pressure chamber, and a third motor is fixedly mounted on the second motor bracket. The third motor is drively connected to the third rotating rod.

[0014] Preferably, a connecting pipe is provided on the outside of the second negative pressure chamber, the top opening of the connecting pipe is arranged inside the first negative pressure chamber, a pneumatic control valve is fixedly installed on the connecting pipe, a third air supply pipe is connected to the bottom opening of the connecting pipe, an air pressure pump is fixedly installed on one side of the third air supply pipe, and the other side of the third air supply pipe is arranged inside the second negative pressure chamber.

[0015] Preferably, the top of the spray cylinder is provided with a central cavity, the inlets of the air supply pipes a and b are both arranged in the central cavity, the air supply pipes a and b are arranged in opposite directions, the inner wall of the spray cylinder is provided with a ventilation hole that communicates with the central cavity, a vortex fan is rotatably installed inside the spray cylinder, the outer wall of the vortex fan is rotatably engaged with the inner wall of the spray cylinder, and the vortex fan is arranged below the ventilation hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, through the intermittent control mechanism and the cooperation structure of the first and second chamber doors, and under the structural constraints of the transmission wheel and the first and second plates, forces the key action of chlorine-based additives entering the feeding hopper independently before the desulfurizer. The above-mentioned sequential feeding mode can, on the one hand, allow the negative pressure airflow to adsorb the chlorine-based additives with lower density first, so that they can fully diffuse in the chamber to form uniformly distributed reactive points. On the other hand, it allows the desulfurizer that enters later to accurately wrap the chlorine-based additives under negative pressure entrainment, forming a combination structure of outer desulfurizer and inner chlorine-based additives. This core-shell combination physically blocks the possibility of chlorine-based additives being exposed. In addition, the synchronously injected fly ash can solidify the coating of chlorine-based additives, completely dismantling the basis for the formation of acidic liquid film, thereby reducing the pitting rate of flue and avoiding damage to the flue. 2. Based on the core-shell combined structure formed by sequential feeding, this invention effectively adjusts and optimizes the negative pressure adsorption force of the first negative pressure chamber on the core-shell combined structure by setting up a pressure sensor linkage. By setting up a staged pressure chamber combination structure of the first and second negative pressure chambers, the precise switching between slow and high-speed airflow can be achieved, which promotes material fusion and prevents sedimentation and accumulation. At the same time, with the linkage structure of the third and fourth chamber doors, the first negative pressure chamber where the desulfurizer and chlorine-based additives are located is strictly limited to a safe reaction range, physically isolating the high temperature of the flue into the first negative pressure chamber, avoiding the 250-400℃ high temperature window for dioxin formation. The above-mentioned progressive multi-negative pressure chamber design structure fundamentally cuts off the reaction chain of chloride ion catalytic dioxin synthesis, so that pollution emissions are always under control and secondary pollution is eliminated. 3. This invention, through the design of opposing air supply pipes a and b, and the connection structure between the intermediate cavity and the ventilation holes, allows air supply pipes a and b to inject high-speed airflow into the intermediate cavity and pre-pressurize it to form a high-pressure cyclone. The airflow is then converted into a multi-directional jet through the annularly arranged ventilation holes. The vortex fan below the ventilation holes reconstructs the discrete airflow into a coaxial spiral flow through curved blades, enabling the high-speed airflow to achieve a three-stage kinetic energy leap. The above design structure geometrically enhances the penetration of the desulfurizing agent, and the uniformity of the flue gas cross-section coverage exceeds the standard of existing injection devices, completely eliminating injection dead zones, avoiding the problem of local desulfurization failure in the flue gas, and improving the desulfurization efficiency of the injection device. Attached Figure Description

[0017] To more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall device structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall device structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the installation of the intermittent control mechanism of the present invention; Figure 4 This is a schematic diagram of the installation structure of the first and second compartment doors of the present invention; Figure 5 This is a schematic diagram of the mounting structure of the first rotating rod and the second rotating rod of the present invention; Figure 6 This is a schematic diagram of the first intermediate support rod and transmission wheel assembly structure of the present invention; Figure 7 This is a schematic diagram of the first bevel gear mounting structure of the present invention; Figure 8 This is a schematic diagram of the assembly structure of the first and second plates of the present invention. Figure 9 This is a schematic diagram of the transmission column arrangement structure of the present invention; Figure 10 This is a schematic diagram of the mounting structure of the second and third bevel gears of the present invention; Figure 11 This is a schematic diagram of the arrangement structure of the first powder outlet pipe and the second powder outlet pipe of the present invention. Figure 12 This is a schematic diagram of the arrangement structure of the connecting pipe and the third air supply pipe of the present invention; Figure 13 This is a schematic diagram of the installation structure of the third and fourth compartment doors of the present invention. Figure 14 This is a schematic diagram of the vortex fan arrangement structure of the present invention; In the diagram: 1. Feeding bin, 2. First feed cylinder, 3. Second feed cylinder, 4. First bin door, 5. Second bin door, 6. Intermittent control mechanism, 601. First rotating rod, 602. Second rotating rod, 603. Bearing frame, 604. First intermediate bearing rod, 605. Lifting frame, 606. Second intermediate bearing rod, 607. First sealed bearing, 608. Second sealed bearing, 609. Third sealed bearing, 610. Bearing housing, 611. First strip plate, 612. Second strip plate, 613. Transmission wheel, 614. Angle opening, 615. Transmission column, 616. First bevel gear, 617. Second bevel gear, 618. Third bevel gear, 619. Fourth bevel gear, 620. First motor bracket, 621. First motor, 62 2. Belt, 7. First negative pressure chamber, 8. Second negative pressure chamber, 9. Third chamber door, 10. Fourth chamber door, 11. Spraying cylinder, 12. Air supply pipe a, 13. Air supply pipe b, 14. Powder feeder, 15. First powder outlet pipe, 16. Second powder outlet pipe, 17. Impeller cover, 18. Second motor, 19. Air pressure sensor, 20. Baffle plate, 21. Third rotating rod, 22. Fourth rotating rod, 23. Fourth sealed bearing, 24. Fifth sealed bearing, 25. Sleeve plate, 26. Through slot, 27. Linking rod, 28. Sleeve rod, 29. Second motor bracket, 30. Third motor, 31. Connecting pipe, 32. Pneumatic control valve, 33. Third air supply pipe, 34. Air pressure pump, 35. Intermediate cavity, 36. Ventilation hole, 37. Vortex fan. Detailed Implementation

[0018] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] This specific embodiment provides an injection device for calcium-based dry desulfurization, such as... Figures 1-14 As shown, the device includes a feeding hopper 1, which is horizontally arranged with openings on both sides and the top. A first feed cylinder 2 is installed at the top opening of the feeding hopper 1. The first feed cylinder 2 has an inverted funnel structure and a spiral surface structure on its outer wall. The first feed cylinder 2 is used to introduce desulfurizing agent into the feeding hopper 1. A second feed cylinder 3 is installed at the outer opening of the feeding hopper 1. The second feed cylinder 3 is horizontally arranged and has a cylindrical structure. The manufacturer can install a horizontal pushing device at the opening of the second feed cylinder 3 to introduce chlorine-based additives into the feeding hopper 1. A first negative pressure chamber 7 is installed at the inner opening of the feeding hopper 1, and the inner cavity of the first negative pressure chamber 7 is connected to the inner cavity of the feeding hopper 1. An impeller cover 17 is rotatably installed inside the first negative pressure chamber 7. The side of the impeller cover 17 closest to the feeding hopper 1 has a trumpet-shaped structure, while the side furthest from the feeding hopper 1 has a wheel-shaped structure. An oblique opening is formed on the outer wall of the wheel-shaped structure. A second motor 18 is fixedly installed on the outside of the first negative pressure chamber 7. The output shaft of the second motor 18 extends into the first negative pressure chamber 7 and connects to one side of the wheel-shaped structure of the impeller cover 17, causing the impeller cover 17 to rotate at high speed within the first negative pressure chamber 7. The rotation of the impeller cover 17 generates a negative pressure airflow within the first negative pressure chamber 7, which entrains the desulfurizing agent and chlorine-based additives from the feeding hopper 1, allowing them to pass through the impeller cover 17 and enter the first negative pressure chamber 7. A pressure sensor 19 is used to extract the pressure parameters within the first negative pressure chamber 7, enabling the output speed of the second motor 18 to be adjusted accordingly.

[0020] like Figure 4 As shown, the feeding bin 1 is equipped with a first door 4 for controlling the connection between the inner cavity of the feeding bin 1 and the first feed cylinder 2. The first door 4 is a square plate structure, and its size is adapted to the inner cavity size of the first feed cylinder 2. The second feed cylinder 3 is equipped with a second door 5 for controlling the connection between the second feed cylinder 3 and the inner cavity of the feeding bin 1. The second door 5 is a round plate structure, and its size is adapted to the inner cavity size of the second feed cylinder 3.

[0021] like Figures 3-10As shown, an intermittent control mechanism 6 is provided on the outer side of the feeding hopper 1. The intermittent control mechanism 6 includes a first rotating rod 601 and a second rotating rod 602. The first rotating rod 601 is arranged horizontally, and the second rotating rod 602 is arranged vertically. The first rotating rod 601 is arranged in the feeding hopper 1, with its inner and outer ends respectively arranged on both sides of the feeding hopper 1. The second rotating rod 602 is arranged in the second feed cylinder 3, with its upper and lower ends respectively arranged on the upper and lower sides of the second feed cylinder 3. Two symmetrically arranged first sealed bearings 607 are fixedly installed on the inner and outer sides of the feeding hopper 1, and the inner and outer ends of the first rotating rod 601 are rotatably engaged with the two first sealed bearings 607 respectively. Two symmetrically arranged third sealed bearings 609 are fixedly installed on the upper and lower sides of the second feed cylinder 3, and the upper and lower ends of the second rotating rod 602 are rotatably engaged with the two third sealed bearings 609 respectively.

[0022] A first intermediate support rod 604 is provided on the side of the first rotating rod 601. A support frame 603 is fixedly installed on the outer side of the feeding bin 1. The support frame 603 is arranged above the second feeding cylinder 3. A second sealed bearing 608 is fixedly installed on the outer side of the feeding bin 1. One inner end of the first intermediate support rod 604 is rotatably engaged with the second sealed bearing 608, and one outer end of the first intermediate support rod 604 is rotatably engaged with the support frame 603, so that the first intermediate support rod 604 is arranged parallel to the first rotating rod 601 and is arranged on the outer side of the feeding bin 1.

[0023] An extension rod is fixedly inserted into the outer end of the first rotating rod 601. A first plate 611 and a second plate 612 are fixedly installed on the outer wall of the extension rod. The first plate 611 and the second plate 612 are arranged from the inside to the outside of the outer end of the first rotating rod 601. Both the first plate 611 and the second plate 612 are arranged perpendicularly to the first rotating rod 601, with the included angle between them being 90°. A transmission wheel 613 is fixedly fitted around the periphery of the first intermediate support rod 604. The transmission wheel 613 is arranged on the side of the support frame 603, and is arranged in the same vertical plane as the first plate 611. The transmission wheel 613 has an included angle opening 614 with an included angle of 90°, making the included angle of the included angle opening 614 the same as the arrangement angle of the first plate 611 and the second plate 612. Edges are provided on both sides of the included angle opening 614, with the included angle between the two edges being 90°. When the transmission wheel 613 rotates, one edge of it can contact the first plate 611; a transmission column 615 is provided on the outer side of the other edge. The transmission column 615 is firmly connected to the plate surface of the transmission wheel 613, and the transmission column 615 is arranged parallel to the first central support rod 604. Simultaneously, the transmission column 615 is arranged perpendicular to both the first plate 611 and the second plate 612, so that when the transmission wheel 613 rotates, the side wall of the transmission column 615 can contact the second plate 612. Figure 9 For example, specifically: when the transmission wheel 613 rotates clockwise, the transmission column 615 first contacts the second plate 612. Under the connecting action of the extension rod, the first rotating rod 601 rotates 90° clockwise. During the clockwise rotation of the transmission wheel 613, the edge of the included angle opening 614 away from the transmission column 615 gradually approaches the first plate 611 until the edge of the included angle opening 614 contacts the first plate 611. Under the transmission action of the first plate 611, the transmission wheel 613 causes the first rotating rod 601 to continue rotating 90° clockwise. It can be seen that after the edges of the transmission column 615 and the included angle opening 614 contact the second plate 612 and the first plate 611 respectively, the first rotating rod 601 rotates a total of 180° clockwise, with an intermittent time in between.

[0024] A lifting frame 605 is fixedly installed inside the support frame 603. A second intermediate support rod 606 is rotatably installed inside the lifting frame 605. The second intermediate support rod 606 is arranged perpendicularly to the first intermediate support rod 604 and the second rotating rod 602. Two symmetrically arranged bearing seats 610 are fixedly installed on both sides of the bottom of the lifting frame 605. The two ends of the second intermediate support rod 606 protrude from the lifting frame 605 and are rotatably engaged with the two bearing seats 610. A first bevel gear 616 is fixedly installed on the outer end of the first intermediate support rod 604. A second bevel gear 617 and a third bevel gear 618 are fixedly installed on both ends of the second intermediate support rod 606, respectively. The second bevel gear 617 meshes with the first bevel gear 616. A fourth bevel gear 619 is fixedly installed on the upper end of the second rotating rod 602. The third bevel gear 618 meshes with the fourth bevel gear 619. A first motor bracket 620 is fixedly installed on the top of the support frame 603. A motor bracket 620 is fixedly installed inside the first motor bracket 620. The first motor 621 has its output shaft arranged parallel to the second intermediate support rod 606. The same belt 622 is fitted on the end of the output shaft of the first motor 621 and the outer wall of the second intermediate support rod 606. When the output shaft of the first motor 621 rotates, the belt 622 drives the second intermediate support rod 606 to rotate. With the cooperation of the first bevel gear 616, the second bevel gear 617, the third bevel gear 618, and the fourth bevel gear 619, the first intermediate support rod 604, the first rotating rod 601, and the second rotating rod 602 rotate simultaneously. The first rotating rod 601 and the second rotating rod 602 are respectively fastened to the first chamber door 4 and the second chamber door 5. Through the transmission structure of the transmission wheel 613 and the first plate 611 and the second plate 612, the chlorine-based additive and the desulfurizing agent are sequentially introduced into the feeding bin 1 through the second feed cylinder 3 and the first feed cylinder 2. Since the second feed cylinder 3 is arranged horizontally, the suction force of the negative pressure airflow in the first negative pressure chamber 7 on the chlorine-based additive is greater than that on the desulfurizing agent, so that the negative pressure airflow in the first negative pressure chamber 7 successively entrains the chlorine-based additive and the desulfurizing agent, and achieves preliminary convergence in the feeding bin 1.

[0025] A second negative pressure chamber 8 is installed at the bottom of the first negative pressure chamber 7, and the first negative pressure chamber 7 and the second negative pressure chamber 8 are connected. For example... Figures 12-13As shown, the top of the second negative pressure chamber 8 is provided with a third chamber door 9 and a fourth chamber door 10 that open and close simultaneously. A folding plate 20 is fixedly connected between the third chamber door 9 and the fourth chamber door 10, and the two sides of the folding plate 20 are respectively fastened to the third chamber door 9 and the fourth chamber door 10. A third rotating rod 21 and a fourth rotating rod 22 are rotatably installed on the top of the second negative pressure chamber 8, and the third rotating rod 21 and the fourth rotating rod 22 are respectively fastened to the third chamber door 9 and the fourth chamber door 10. A fourth sealing bearing 23 and a fifth sealing bearing 24 are fixedly installed on the outside of the second negative pressure chamber 8. There are two of each of the fourth sealing bearing 23 and the fifth sealing bearing 24. Both ends of the third rotating rod 21 and the fourth rotating rod 22 protrude from the second negative pressure chamber 8, and both ends of the third rotating rod 21 and the fourth rotating rod 22 are rotatably engaged with the two fourth sealing bearings 23 and the two fifth sealing bearings 24, respectively. The outer ends of the third rotating rod 21 and the fourth rotating rod 22 are each equipped with a sleeve plate 25. Each sleeve plate 25 has a through slot 26. A connecting rod 27 is provided between the two sleeve plates 25. Two sleeve rods 28, both perpendicular to the connecting rod 27, are fitted onto the outer wall of the connecting rod 27. The two sleeve rods 28 are slidably engaged with the two through slots 26. A second motor bracket 29 is fixedly installed on the side of the second negative pressure chamber 8. A third motor 30 is fixedly installed on the second motor bracket 29. The output shaft of the third motor 30 is connected to the third rotating rod 21 via a coupling. When the output shaft of the third motor 30 rotates, the third rotating rod 21 and the fourth rotating rod 22 rotate simultaneously. Under the connecting action of the folding plate 20, the third chamber door 9 and the fourth chamber door 10 are simultaneously opened and closed, thus controlling whether the first negative pressure chamber 7 is connected to the second negative pressure chamber 8.

[0026] A powder feeder 14 is fixedly installed on the side of the first negative pressure chamber 7 via a support. The powder feeder 14 has one powder inlet and two powder outlets. The two powder outlets are respectively connected to a first powder outlet pipe 15 and a second powder outlet pipe 16. The powder outlet of the first powder outlet pipe 15 is connected to the inner cavity of the feeding silo 1. The first powder outlet pipe 15 is used to convey fly ash into the feeding silo 1. After the fly ash is mixed with the desulfurizing agent and chlorine-based additive, it can effectively improve the basic fluidity of the desulfurizing agent and chlorine-based additive, and accelerate the flow rate of the desulfurizing agent and chlorine-based additive in the feeding silo 1. The powder outlet of the second powder outlet pipe 16 is connected to the inner cavity of the first negative pressure chamber 7. The second powder outlet pipe 16 is used to convey nano-SiO2 powder into the first negative pressure chamber 7. After the chlorine-based additive is mixed with nano-SiO2, it can effectively improve the moisture resistance of the desulfurizing agent and avoid the formation of an acidic liquid film, thereby protecting the outer shell of the injection device and the flue wall.

[0027] The second negative pressure chamber 8 is provided with a connecting pipe 31 on its outer side. The connecting pipe 31 is arranged vertically, and its top opening is located inside the first negative pressure chamber 7. A pneumatic control valve 32 is fixedly installed on the connecting pipe 31. The bottom opening of the connecting pipe 31 is connected to a third air supply pipe 33. The part of the third air supply pipe 33 connected to the connecting pipe 31 is arranged horizontally. A pneumatic pump 34 is fixedly installed on one side of the third air supply pipe 33, and the other side of the third air supply pipe 33 is located inside the second negative pressure chamber 8. By setting up the pneumatic pump 34, airflow can be introduced into the first negative pressure chamber 7 and the second negative pressure chamber 8 respectively, so that the operators can change the air pressure parameters in the first negative pressure chamber 7 and the second negative pressure chamber 8 according to the production needs, which greatly improves the coordination and flexibility of the overall device.

[0028] The bottom of the second negative pressure chamber 8 is equipped with a spray nozzle 11, such as... Figure 14 As shown, the side of the injection cylinder 11 is equipped with symmetrically arranged air supply pipes a12 and b13. A central cavity 35 is provided at the top of the injection cylinder 11. The outlets of the air supply pipes a12 and b13 are both located within the central cavity 35. The outlet directions of the air supply pipes a12 and b13 are opposite to each other. The inlets of the air supply pipes a12 and b13 can be connected to the outlet duct of an external air compressor, allowing the air supply pipes a12 and b13 to introduce high-speed airflow into the top of the injection cylinder 11. Furthermore, a ventilation hole 36 is provided on the inner wall of the injection cylinder 11, communicating with the central cavity 35. This ventilation hole 36 allows the high-speed airflow to enter the interior of the injection cylinder 11, forming a high-speed vortex within it. This high-speed vortex can effectively entrain the desulfurizing agent and chlorine-based additives. The spray cylinder 11 is rotatably equipped with a vortex fan 37. The outer wall of the vortex fan 37 is rotatably engaged with the inner wall of the spray cylinder 11, and the vortex fan 37 is arranged below the ventilation hole 36. By setting the vortex fan 37, the high-speed vortex of the entrained desulfurizing agent and chlorine-based additive can be guided to rush out of the spray cylinder 11 at high speed and be sprayed into the flue.

[0029] The working principle of this invention is as follows: On-site workers use a horizontal pushing device to feed the chlorine-based additive into the second feed cylinder 3. After starting the first motor 621, the second intermediate support rod 606 rotates in the hoisting frame 605. Through the transmission action of the second bevel gear 617 and the third bevel gear 618, the first intermediate support rod 604 and the second rotating rod 602 rotate simultaneously. At this time, the second rotating rod 602 can drive the second chamber door 5 to rotate inside the second feed cylinder 3, and by starting the second motor 18, the chlorine-based additive in the second feed cylinder 3 enters the feeding hopper 1 first under the action of the negative pressure airflow in the first negative pressure chamber 7; at the same time, the first middle support rod 604 can drive the transmission wheel 613 to rotate, and after the transmission column 615 contacts the second strip plate 612, the second strip plate 612 and the first strip plate 611 rotate together, causing the first rotating rod 601 to drive the first chamber door 4 to rotate 90° in the feeding hopper 1, so that the desulfurizer is introduced into the feeding hopper 1, until the edge of the included angle opening 614 touches the first strip plate 611, the first strip plate 611 drives the first chamber door 4 to continue to rotate 90° in the feeding hopper 1, thereby closing the connection between the feeding hopper 1 and the first feed cylinder 2, and completing the delivery of the desulfurizer.

[0030] By activating the powder feeder 14, fly ash is fed into the inner cavity of the feeding hopper 1 through the first powder outlet pipe 15, thereby improving the basic fluidity of the desulfurizer and chlorine-based additives and accelerating their flow rate within the feeding hopper 1. The chlorine-based additives and desulfurizer enter the impeller shroud 17 sequentially, where the desulfurizer encapsulates the chlorine-based additives. Under the high-speed rotation of the impeller shroud 17, the desulfurizer and chlorine-based additives are jointly fed into the first negative pressure chamber 7. At this time, the third chamber door 9 and the fourth chamber door 10 are both closed. By activating the powder feeder 14, nano-SiO2 powder is fed into the first negative pressure chamber 7 through the second powder outlet pipe 16. When the chlorine-based additives come into contact with the nano-SiO2, the moisture-proof capability of the desulfurizer is effectively improved, preventing the formation of an acidic liquid film, thus protecting the outer shell of the injection device and the flue wall.

[0031] After the desulfurizing agent and chlorine-based additive form a stable structure in the first negative pressure chamber 7, the third motor 30 is started, which simultaneously opens the third chamber door 9 and the fourth chamber door 10, allowing the desulfurizing agent and chlorine-based additive to be delivered into the second negative pressure chamber 8. At this time, the operator can obtain other parameters in the first negative pressure chamber 7 through the air pressure sensor 19, thereby starting the air pressure pump 34. Under the regulation of the pneumatic control valve 32, before the desulfurizing agent and chlorine-based additive leave the first negative pressure chamber 7, a slow airflow can be introduced into the first negative pressure chamber 7 through the connecting pipe 31 to accelerate the fusion of the desulfurizing agent and chlorine-based additive. After the desulfurizing agent and chlorine-based additive enter the second negative pressure chamber 8, the connecting pipe 31 is closed, and a high-speed airflow is delivered into the second negative pressure chamber 8 through the third air supply pipe 33 to accelerate the flow rate of the desulfurizing agent and chlorine-based additive in the second negative pressure chamber 8, allowing them to pass through the second negative pressure chamber 8 quickly.

[0032] Air supply pipes a12 and b13 can inject high-speed airflow into the intermediate cavity 35 and pre-pressurize it to form a high-pressure cyclone. The airflow is then converted into a multi-directional jet through the annularly arranged ventilation holes 36. After the desulfurizing agent and chlorine-based additive enter the injection cylinder 11, the vortex fan 37 below the ventilation holes 36 reconstructs the discrete airflow into a coaxial spiral flow through curved blades, enabling the high-speed airflow to achieve a three-stage kinetic energy leap. This coaxial spiral flow can fully entrain the desulfurizing agent and chlorine-based additive, and under the rotation of the vortex fan 37, it further guides the high-speed vortex entraining the desulfurizing agent and chlorine-based additive to rush out of the injection cylinder 11 at high speed and spray it into the flue, completely eliminating the injection dead zone, thereby removing SO2 from the flue.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A spraying device for calcium-based dry desulfurization, comprising a feeding hopper (1), characterized in that, The top of the feeding silo (1) is equipped with a first feed cylinder (2) for introducing desulfurizing agent. The outside of the feeding silo (1) is equipped with a second feed cylinder (3) for introducing chlorine-based additives. The inside of the feeding silo (1) is equipped with a first door (4) for controlling the connection between the inner cavity of the feeding silo (1) and the first feed cylinder (2). The inside of the second feed cylinder (3) is equipped with a second door (5) for controlling the connection between the second feed cylinder (3) and the inner cavity of the feeding silo (1). An intermittent control mechanism (6) is provided on the outside of the feeding silo (1). The intermittent control mechanism (6) is used to simultaneously control the intermittent opening and closing of the first door (4) and the second door (5), so that the chlorine-based additives and desulfurizing agent enter the inner cavity of the feeding silo (1) in sequence. The inside of the feeding silo (1) is equipped with a first negative pressure chamber (7). The inner cavity of the pressure chamber (7) is connected to the inner cavity of the feeding chamber (1). The bottom of the first negative pressure chamber (7) is equipped with a second negative pressure chamber (8). The first negative pressure chamber (7) and the second negative pressure chamber (8) are used to draw in and accelerate the flow rate of desulfurizing agent and chlorine-based additive. The top of the first negative pressure chamber (7) is provided with a third chamber door (9) and a fourth chamber door (10) that open and close simultaneously. The bottom of the second negative pressure chamber (8) is equipped with a spray cylinder (11). The side of the spray cylinder (11) is equipped with symmetrically arranged air supply pipes a (12) and b (13). The air supply pipes a (12) and b (13) are used to introduce high-speed airflow to the top of the spray cylinder (11), so that a high-speed vortex is generated in the inner cavity of the spray cylinder (11), and the desulfurizing agent and chlorine-based additive are sprayed at high speed from the outlet at the bottom of the spray cylinder (11).

2. The injection device for calcium-based dry desulfurization according to claim 1, characterized in that, The intermittent control mechanism (6) includes a first rotating rod (601) and a second rotating rod (602). The first rotating rod (601) and the second rotating rod (602) are respectively fastened to the first chamber door (4) and the second chamber door (5). The first rotating rod (601) and the second rotating rod (602) are arranged perpendicularly. A support frame (603) is fixedly installed on the outside of the feeding hopper (1). The support frame (603) is arranged above the second feed cylinder (3). A rotatable first feed cylinder is provided inside the support frame (603). A first intermediate support rod (604) is connected to a first rotating rod (601) and arranged in parallel. A lifting frame (605) is fixedly installed inside the bearing frame (603). A second intermediate support rod (606) is rotatably installed inside the lifting frame (605). The second intermediate support rod (606) is rotatably connected to the first intermediate support rod (604) and the second rotating rod (602), and the second intermediate support rod (606) is arranged perpendicular to the first intermediate support rod (604) and the second rotating rod (602).

3. The injection device for calcium-based dry desulfurization according to claim 2, characterized in that, Two symmetrically arranged first sealed bearings (607) are fixedly installed on the inner and outer sides of the feeding bin (1). The inner and outer ends of the first rotating rod (601) are respectively rotatably engaged with the two first sealed bearings (607). A second sealed bearing (608) is fixedly installed on the outer side of the feeding bin (1). One end of the inner side of the first middle support rod (604) is rotatably engaged with the second sealed bearing (608). One end of the outer side of the first middle support rod (604) is rotatably engaged with the support frame (603). Two symmetrically arranged third sealed bearings (609) are fixedly installed on the upper and lower sides of the second feeding cylinder (3). The upper and lower ends of the second rotating rod (602) are respectively rotatably engaged with the two third sealed bearings (609). Two symmetrically arranged bearing seats (610) are fixedly installed on both sides of the hoisting frame (605). The two ends of the second middle support rod (606) are respectively rotatably engaged with the two bearing seats (610).

4. The injection device for calcium-based dry desulfurization according to claim 2, characterized in that, A first plate (611) and a second plate (612) are fixedly installed sequentially from the inside to the outside on the outer end of the first rotating rod (601). Both the first plate (611) and the second plate (612) are arranged perpendicularly to the first rotating rod (601). The first plate (611) and the second plate (612) are arranged perpendicularly to each other. A transmission wheel (613) is fixedly fitted around the outer periphery of the first central support rod (604). The transmission wheel (613) is arranged in the same vertical plane as the first plate (611). The transmission wheel (613) has an angled opening (614) with an opening angle of 90°. One side edge of the angled opening (614) can touch the first plate (611). The other side edge of the angled opening (614) is provided with a transmission column (615) that is fastened to the transmission wheel (613). The transmission column (615) is arranged parallel to the first middle support rod (604). The side wall of the transmission column (615) can also touch the second plate (612).

5. The injection device for calcium-based dry desulfurization according to claim 2, characterized in that, A first bevel gear (616) is fixedly installed on the outer end of the first middle support rod (604). A second bevel gear (617) and a third bevel gear (618) are fixedly installed on both ends of the second middle support rod (606). The second bevel gear (617) meshes with the first bevel gear (616). A fourth bevel gear (619) is fixedly installed on the upper end of the second rotating rod (602). The third bevel gear (618) meshes with the fourth bevel gear (619). A first motor bracket (620) is fixedly installed on the top of the support frame (603). A first motor (621) is fixedly installed inside the first motor bracket (620). The output shaft of the first motor (621) is connected to the second middle support rod (606) via a belt (622).

6. The injection device for calcium-based dry desulfurization according to claim 1, characterized in that, A powder feeder (14) is fixedly installed on the side of the first negative pressure chamber (7). The powder feeder (14) is connected to a first powder outlet pipe (15) and a second powder outlet pipe (16). The powder outlet of the first powder outlet pipe (15) is connected to the inner cavity of the feeding silo (1). The first powder outlet pipe (15) is used to convey fly ash into the feeding silo (1). The powder outlet of the second powder outlet pipe (16) is connected to the inner cavity of the first negative pressure chamber (7). The second powder outlet pipe (16) is used to convey nano SiO2 powder into the first negative pressure chamber (7).

7. The injection device for calcium-based dry desulfurization according to claim 1, characterized in that, An impeller cover (17) is rotatably installed inside the first negative pressure chamber (7). A second motor (18) is fixedly installed on the outside of the first negative pressure chamber (7). The output shaft of the second motor (18) is tightly connected to the impeller cover (17). A pressure sensor (19) is fixedly installed on the top of the first negative pressure chamber (7). The pressure sensor (19) is used to extract the pressure parameters inside the first negative pressure chamber (7).

8. The injection device for calcium-based dry desulfurization according to claim 1, characterized in that, A folding plate (20) is fixedly connected between the third door (9) and the fourth door (10). A third rotating rod (21) and a fourth rotating rod (22) are rotatably mounted on the top of the second negative pressure chamber (8). The third rotating rod (21) and the fourth rotating rod (22) are respectively fastened to the third door (9) and the fourth door (10). A fourth sealed bearing (23) and a fifth sealed bearing (24) are fastened to the side of the second negative pressure chamber (8). The two ends of the third rotating rod (21) and the fourth rotating rod (22) are respectively rotatably engaged with the fourth sealed bearing (23) and the fifth sealed bearing (24). 21) The outer ends of the fourth rotating rod (22) are equipped with sleeve plates (25), and the two sleeve plates (25) are provided with through slots (26). A connecting rod (27) is provided between the two sleeve plates (25). Two sleeve rods (28) are fitted on the outer wall of the connecting rod (27) and are arranged perpendicular to the connecting rod (27). The two sleeve rods (28) are slidably engaged with the two through slots (26) respectively. The second negative pressure chamber (8) is fixedly installed on the side of the second motor bracket (29). The second motor bracket (29) is fixedly installed on the second motor bracket (29). The third motor (30) is connected to the third rotating rod (21) in a transmission.

9. The injection device for calcium-based dry desulfurization according to claim 1, characterized in that, A connecting pipe (31) is provided on the outside of the second negative pressure chamber (8). The top opening of the connecting pipe (31) is arranged inside the first negative pressure chamber (7). A pneumatic control valve (32) is fixedly installed on the connecting pipe (31). A third air supply pipe (33) is connected to the bottom opening of the connecting pipe (31). A pneumatic pump (34) is fixedly installed on one side of the third air supply pipe (33). The other side of the third air supply pipe (33) is arranged inside the second negative pressure chamber (8).

10. The injection device for calcium-based dry desulfurization according to claim 1, characterized in that, The top of the spray cylinder (11) is provided with a central cavity (35). The openings of the air supply pipes a (12) and b (13) are arranged in the central cavity (35). The air supply pipes a (12) and b (13) are arranged in opposite directions. The inner wall of the spray cylinder (11) is provided with a ventilation hole (36) that communicates with the central cavity (35). A vortex fan (37) is rotatably installed inside the spray cylinder (11). The outer wall of the vortex fan (37) is rotatably engaged with the inner wall of the spray cylinder (11). The vortex fan (37) is arranged below the ventilation hole (36).

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