A multi-stage jet slurry mixing device for flue gas desulfurization in circulating fluidized bed boilers

Abstract

This utility model discloses a multi-stage jet slurry mixing device for flue gas desulfurization in circulating fluidized bed boilers, relating to the field of flue gas desulfurization technology. Addressing the problem of insufficient mixing efficiency and incomplete reaction caused by traditional nozzles, the device includes a mixing tank with symmetrical multi-stage jetting components. Each component includes a servo motor with symmetrical rotating shafts at its front end. The power output shaft of the servo motor is connected to one side of one of the rotating shafts via a coupling. This multi-stage jet slurry mixing device for flue gas desulfurization in circulating fluidized bed boilers optimizes the slurry atomization and flue gas mixing process, significantly improving system performance. The fine atomization of the slurry greatly increases the contact area with the flue gas, increasing the collision probability between SO2 and the absorbent, improving SO2 absorption efficiency, and enhancing the operational efficiency of the desulfurization system.

Description

Technical Field

[0001] This utility model relates to the field of boiler flue gas desulfurization technology, and in particular to a multi-stage jet slurry mixing device for flue gas desulfurization of circulating fluidized bed boilers. Background Technology

[0002] The slurry mixing device for boiler flue gas desulfurization combines multi-stage injection with mechanical stirring to shorten the mixing distance and enhance turbulence, enabling the desulfurizing agent to be quickly dispersed in the flue gas. This device is suitable for flue gas purification in coal-fired power plants, industrial boilers, and other scenarios, and is especially suitable for use in conjunction with circulating fluidized bed reactors to achieve integrated desulfurization and dust removal.

[0003] Traditional nozzles have limitations in mixing lime slurry with flue gas. Due to structural and working principle constraints, the lime slurry is not ideally dispersed, has a small contact area with flue gas, and low reactivity, resulting in incomplete reaction. Some SO2 is discharged without reacting, reducing desulfurization efficiency. Utility Model Content

[0004] This utility model discloses a multi-stage jet slurry mixing device for flue gas desulfurization in circulating fluidized bed boilers, aiming to solve the technical problem that in wet desulfurization, the mixing efficiency of lime slurry and flue gas directly affects the SO2 removal effect, and the mixing efficiency of traditional nozzles may be insufficient, leading to incomplete reaction.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage jet slurry mixing device for flue gas desulfurization in a circulating fluidized bed boiler, comprising a mixing tank, on which symmetrical multi-stage jetting components are arranged. The multi-stage jetting components include a servo motor, with symmetrical rotating shafts at the front end of the servo motor. The power output shaft of the servo motor is connected to one side of one of the rotating shafts via a coupling, and a belt is movably connected to the outer side of the opposite rotating shaft. Pulling ropes are movably connected to the outer side of each rotating shaft. A pulling member is fixedly connected to the outer side of the bottom end of the pulling rope, and a mixing plate is fixedly connected to the outer side of the bottom end of the pulling member. A spring rod is fixedly connected to the bottom end of the mixing plate, and a telescopic spring is fixedly connected to the bottom end of the mixing plate. The telescopic spring is located outside the spring rod, and the bottom ends of the telescopic spring and the spring rod are fixedly connected to the inner wall of the bottom end of the mixing tank. An annular member is fixedly connected to the outer side of the mixing plate, and an atomizing spray ring is fixedly connected to the inner side of the annular member.

[0006] Equipped with a mixing tank and multi-stage injection components, the servo motor transmits power to a rotating shaft on one side when the flue gas and atomized gas are mixed. This shaft begins to rotate, and due to the rotating connection between the shafts and the belt, the other rotating shaft also rotates. As the shafts rotate, the pulling rope is pulled downwards, causing the pulling component to move downwards. This, in turn, moves the mixing plate fixed at the bottom of the pulling component downwards. During this downward movement, the spring rod and telescopic spring at the bottom of the mixing plate are compressed. The spring rod provides guidance and support, while the telescopic spring stores elastic potential energy during compression. As the mixing plate moves downwards, it pushes the flue gas in the mixing tank downwards, directing it towards the atomization area at the bottom of the mixing tank. Simultaneously, the slurry enters the atomizing spray ring fixed inside the annular component on the outer side of the mixing plate. Through the action of the atomizing spray ring, the slurry is atomized into fine particles. As the mist is ejected, the servo motor drives the rotating shaft to rotate at a certain angle, reducing the tension of the rope on the pulling component. At this time, the telescopic spring, which stores elastic potential energy, begins to release energy, pushing the mixing plate upward. During the upward movement of the mixing plate, it also pulls the flue gas mixed with mist in the atomization area below upward, further mixing the flue gas and atomized gas. As the mixing plate continuously moves up and down, it continuously guides the flue gas into the atomization area while simultaneously stirring and mixing the flue gas already mixed with mist, thus achieving a thorough and uniform mixing of the flue gas and atomized gas to achieve the desired mixing effect. In this process, the multi-stage injection components optimize the slurry atomization and flue gas mixing process, significantly improving system performance. The slurry is finely atomized, greatly increasing the contact area with the flue gas, increasing the collision probability between SO2 and the absorbent, improving SO2 absorption efficiency, and enhancing the operating efficiency of the desulfurization system.

[0007] In a preferred embodiment, a symmetrical annular fixing seat is fixedly connected to the inner top of the mixing tank, an annular slurry atomizing pipe is fixedly connected to the inner side of the annular fixing seat, and multiple atomizing nozzles are fixedly connected to the outer side of the annular slurry atomizing pipe. A slurry input pipe is fixedly connected to the outer side of the top of the annular slurry atomizing pipe, and the outer side of the slurry input pipe is fixedly connected to the outer side of the mixing tank. A layered filter plate is fixedly connected to the inner center of the mixing tank, and two multi-stage spraying components are located below the layered filter plate. A lower slurry pipe is fixedly connected to the outer side of the top of the atomizing spray ring, and the outer side of the lower slurry pipe is fixedly connected to the outer side of the mixing tank.

[0008] In a preferred embodiment, a mixing assembly is disposed above the layered filter plate. The mixing assembly includes a drive motor located above the mixing tank. The power output shaft of the drive motor is connected to a rotating rod via a coupling. A perforation is provided at the top of the mixing tank, and the rotating rod is movably connected within the perforation. A rotating seat is fixedly connected to the bottom of the rotating rod. Rotating rods are movably connected to the inner sides of both ends of the rotating seat. Rotating gears are fixedly connected to the outer sides of both rotating rods. The rotating gears are located between the inner sides of both ends of the rotating seat. A gear ring is connected to the outer side of the rotating gear via a tooth groove. Symmetrical fixing frames are fixedly connected to the outer side of the gear ring. The top of the fixing frame is fixedly connected to the outer side of the annular fixing seat. A baffle is fixedly connected to the outer side of each rotating rod, and a baffle blade is fixedly connected to the bottom of each rotating rod.

[0009] When the mixing components are installed for stratified atomization, the drive motor starts, causing the rotating rod to rotate. The rotating rod passes through the perforation at the top of the mixing tank, thereby causing the rotating seat to rotate as well. When the rotating seat rotates, the rotating rod, which is movably connected to the inner sides of both ends, will have a tendency to move due to the rotation of the rotating seat. Since there is a rotating gear fixed on the outer side of the rotating rod, the rotation of the rotating seat will cause the rotating gear to rotate around its own axis, thereby causing the rotating rod to rotate. As the rotating rod rotates, the baffle plate rotates accordingly, stirring and agitating the gas or material above the stratified filter plate, making its distribution more uniform. At the same time, the baffle at the bottom of the rotating rod also agitates the area below during the rotation, further enhancing the mixing effect and making the mixing process continuous and efficient.

[0010] As can be seen from the above, the multi-stage jet slurry mixing device for flue gas desulfurization of circulating fluidized bed boilers provided by this utility model has multi-stage jet components to optimize the slurry atomization and flue gas mixing process, which can significantly improve system performance. The slurry is finely atomized, greatly increasing the contact area with the flue gas, increasing the collision probability between SO2 and absorbent, improving SO2 absorption efficiency, and enhancing the operating efficiency of the desulfurization system. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of a multi-stage jet slurry mixing device for flue gas desulfurization in a circulating fluidized bed boiler, as proposed in this utility model.

[0012] Figure 2 This is a schematic diagram of the internal structure of the mixing tank of a multi-stage jet slurry mixing device for flue gas desulfurization in a circulating fluidized bed boiler, as proposed in this utility model.

[0013] Figure 3 This is a schematic diagram of the structure above the layered filter plate of a multi-stage jet slurry mixing device for flue gas desulfurization in a circulating fluidized bed boiler, as proposed in this utility model.

[0014] Figure 4 This is a schematic diagram of the mixing component structure of a multi-stage jet slurry mixing device for flue gas desulfurization in a circulating fluidized bed boiler, as proposed in this utility model.

[0015] Figure 5 This is a schematic diagram of the multi-stage injection component structure of a multi-stage injection slurry mixing device for flue gas desulfurization of circulating fluidized bed boilers proposed in this utility model.

[0016] In the attached diagram: 1. Mixing tank; 2. Slurry input pipe; 3. Annular slurry atomizing pipe; 4. Annular fixed seat; 5. Mixing assembly; 501. Drive motor; 502. Rotating rod; 503. Rotating seat; 504. Rotating rod; 505. Rotating gear; 506. Gear ring; 507. Fixed frame; 508. Baffle plate; 509. Baffle blade; 6. Layered filter plate; 7. Multi-stage spray assembly; 701. Servo motor; 702. Rotating shaft; 703. Belt; 704. Pulling rope; 705. Pulling component; 706. Mixing plate; 707. Atomizing spray ring; 708. Annular component; 709. Spring rod; 710. Telescopic spring; 8. Lower slurry pipe; 9. Atomizing nozzle. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] The multi-stage jet slurry mixing device for flue gas desulfurization of circulating fluidized bed boilers disclosed in this utility model is mainly used in wet desulfurization, where the mixing efficiency of lime slurry and flue gas directly affects the SO2 removal effect. The mixing efficiency of traditional nozzles may be insufficient, leading to incomplete reaction.

[0019] Reference Figures 1-5A multi-stage jet slurry mixing device for flue gas desulfurization in a circulating fluidized bed boiler includes a mixing tank 1. The mixing tank 1 is equipped with symmetrical multi-stage jetting components 7. Each multi-stage jetting component 7 includes a servo motor 701. Symmetrical rotating shafts 702 are located at the front end of the servo motor 701. The power output shaft of the servo motor is connected to one side of one of the rotating shafts 702 via a coupling. A belt 703 is rotatably connected to the outer side of the opposite rotating shaft 702. Pulling ropes 704 are rotatably connected to the outer side of each rotating shaft 702. The bottom end of each pulling rope 704 is located on the outer side of the belt. A pulling member 705 is bolted to the outside of the bottom of the pulling member 705, and a mixing plate 706 is bolted to the outside of the bottom of the mixing plate 706. A spring rod 709 is bolted to the bottom of the mixing plate 706, and a telescopic spring 710 is bolted to the bottom of the mixing plate 706. The telescopic spring 710 is located outside the spring rod 709, and the bottom of the telescopic spring 710 and the spring rod 709 are bolted to the inner wall of the bottom of the mixing tank 1. An annular member 708 is bolted to the outside of the mixing plate 706, and an atomizing spray ring 707 is bolted to the inside of the annular member 708.

[0020] Reference Figure 1 , Figure 2 and Figure 3 In a preferred embodiment, a symmetrical annular fixing seat 4 is bolted to the inner top of the mixing tank 1. An annular slurry atomizing pipe 3 is bolted to the inner side of the annular fixing seat 4, and multiple atomizing nozzles 9 are bolted to the outer side of the annular slurry atomizing pipe 3. A slurry input pipe 2 is bolted to the outer side of the top of the annular slurry atomizing pipe 3. The outer side of the slurry input pipe 2 is bolted to the outer side of the mixing tank 1. A layered filter plate 6 is bolted to the inner center of the mixing tank 1. Two multi-stage spraying components 7 are located below the layered filter plate 6. A lower slurry pipe 8 is bolted to the outer side of the top of the atomizing spray ring 707, and the outer side of the lower slurry pipe 8 is bolted to the outer side of the mixing tank 1.

[0021] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4In a preferred embodiment, a mixing assembly 5 is disposed above the layered filter plate 6. The mixing assembly 5 includes a drive motor 501, which is located above the mixing tank 1. The power output shaft of the drive motor 501 is connected to a rotating rod 502 via a coupling. A through hole is provided at the top of the mixing tank 1, and the rotating rod 502 is located inside the through hole and is rotatably connected. The bottom end of the rotating rod 502 is bolted to a rotating seat 503, and the inner sides of both ends of the rotating seat 503 are rotatably connected to rotating rods 504. The outer sides of both rotating rods are connected by bolts. A rotating gear 505 is bolted to the outside of the rotating base 503. The rotating gear 505 is located between the inner sides of both ends of the rotating base 503. A gear ring 506 is bolted to the outside of the rotating gear 505. The gear ring 506 and the rotating gear 505 mesh with each other through tooth grooves. A symmetrical fixing frame 507 is bolted to the outside of the gear ring 506. The top of the fixing frame 507 is bolted to the outside of the annular fixing base 4. A spoiler 508 is bolted to the outside of the rotating rod 504. A spoiler 509 is bolted to the bottom of the rotating rod 504.

[0022] Working principle: When the flue gas and atomizing gas are mixed, the servo motor 701 transmits power to the rotating shaft 702 on one side, causing the rotating shaft 702 to start rotating. Since the rotating shaft 702 is rotatably connected to the belt 703, the rotating shaft 702 on the other side will also rotate. As the rotating shaft 702 rotates, the pulling rope 704 is driven, pulling the pulling member 705 downward, which in turn drives the mixing plate 706 fixed at the bottom of the pulling member 705 to move downward. During the downward movement of the mixing plate 706, the spring rod 709 and the telescopic spring 710 at the bottom of the mixing plate 706 will be compressed. The spring rod 709 acts as a guide... The mixing plate 706 acts as a guide and support, while the telescopic spring 710 stores elastic potential energy during compression. When the mixing plate 706 moves downward, it pushes the flue gas in the mixing tank 1 downward, causing the flue gas to move towards the atomization area at the bottom of the mixing tank 1. At the same time, the slurry enters the atomizing spray ring 707 fixed inside the annular part 708 on the outer side of the mixing plate 706. Through the action of the atomizing spray ring 707, the slurry is atomized into fine droplets and sprayed out. After the servo motor 701 drives the rotating shaft 702 to rotate a certain angle, the pulling force of the rope 704 on the pulling part 705 decreases. At this time, the telescopic spring 710, which stores elastic potential energy, begins to release energy, pushing the mixing plate 706 downward. 06 moves upwards. During this upward movement, the mixing plate 706 also pulls the smoke mixed with droplets from the atomizing area below upwards, further mixing the smoke and atomizing gas. As the mixing plate 706 continuously moves up and down, it continuously guides smoke into the atomizing area while simultaneously stirring and mixing the already mixed smoke droplets, achieving a thorough and uniform mixture of smoke and atomizing gas to achieve the desired mixing effect. During stratified atomization, the drive motor 501 starts, causing the rotating rod 502 to rotate. The rotating rod 502 passes through the perforation at the top of the mixing barrel 1, thus causing the rotating seat 503 to rotate as well. When 503 rotates, the rotating rod 504, which is movably connected to the inner sides of both ends, tends to move due to the rotation of the rotating seat 503. Since the rotating gear 505 is fixed on the outer side of the rotating rod 504, the rotation of the rotating seat 503 will cause the rotating gear 505 to rotate around its own axis, thereby driving the rotating rod 504 to rotate. As the rotating rod 504 rotates, the baffle 508 rotates accordingly, stirring and disturbing the gas or material above the layered filter plate 6, making its distribution more uniform. At the same time, the baffle 509 at the bottom of the rotating rod 504 also disturbs the area below during the rotation, further enhancing the mixing effect and making the mixing process continuous and efficient.

[0023] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A multi-stage jet slurry mixing device for flue gas desulfurization of circulating fluidized bed boilers, comprising a mixing barrel (1), characterized in that, The mixing tank (1) is provided with a symmetrical multi-stage spray assembly (7). The multi-stage spray assembly (7) includes a servo motor (701). The front end of the servo motor (701) is provided with a symmetrical rotating shaft (702). The power output shaft of the servo motor is connected to one side of one of the rotating shafts (702) through a coupling. A belt (703) is movably connected to the outer side of the opposite rotating shaft (702). Pulling ropes (704) are movably connected to the outer side of each rotating shaft (702). A pulling member (705) is fixedly connected to the outer side of the bottom end of the pulling rope (704). A mixing plate (706) is fixedly connected to the outer side of the bottom end of the moving part (705). A spring rod (709) is fixedly connected to the bottom end of the mixing plate (706). A telescopic spring (710) is fixedly connected to the bottom end of the mixing plate (706). The telescopic spring (710) is located outside the spring rod (709). The bottom ends of the telescopic spring (710) and the spring rod (709) are fixedly connected to the inner wall of the bottom end of the mixing barrel (1). An annular part (708) is fixedly connected to the outer side of the mixing plate (706). An atomizing spray ring (707) is fixedly connected to the inner side of the annular part (708).

2. A multi-stage jet type slurry mixing device for flue gas desulfurization of a circulating fluidized bed boiler according to claim 1, characterized in that, The mixing tank (1) has a symmetrical annular fixing seat (4) fixedly connected to the top of its inner side. An annular slurry atomizing pipe (3) is fixedly connected to the inner side of the annular fixing seat (4), and multiple atomizing nozzles (9) are fixedly connected to the outer side of the annular slurry atomizing pipe (3).

3. The multi-stage jet slurry mixing device for flue gas desulfurization in a circulating fluidized bed boiler according to claim 2, characterized in that, The outer side of the top of the annular slurry atomizing pipe (3) is fixedly connected to the slurry input pipe (2), the outer side of the slurry input pipe (2) is fixedly connected to the outer side of the mixing tank (1), and the inner center of the mixing tank (1) is fixedly connected to the layered filter plate (6).

4. A multi-stage jet slurry mixing device for flue gas desulfurization in a circulating fluidized bed boiler according to claim 3, characterized in that, The two multi-stage spraying components (7) are located below the layered filter plate (6), and the outer side of the top of the atomizing spray ring (707) is fixedly connected to the lower slurry pipe (8), and the outer side of the lower slurry pipe (8) is fixedly connected to the outer side of the mixing tank (1).

5. A multi-stage jet slurry mixing device for flue gas desulfurization in a circulating fluidized bed boiler according to claim 3, characterized in that, A mixing component (5) is provided above the layered filter plate (6). The mixing component (5) includes a drive motor (501). The drive motor (501) is located above the mixing tank (1). The power output shaft of the drive motor (501) is connected to a rotating rod (502) through a coupling. A through hole is provided at the top of the mixing tank (1). The rotating rod (502) is movably connected inside the through hole. A rotating seat (503) is fixedly connected to the bottom end of the rotating rod (502). Rotating rods (504) are movably connected to the inner sides of both ends of the rotating seat (503).

6. A multi-stage jet slurry mixing device for flue gas desulfurization in a circulating fluidized bed boiler according to claim 5, characterized in that, A rotating gear (505) is fixedly connected to the outer side of each of the two moving rods. The rotating gear (505) is located between the inner sides of both ends of the rotating seat (503). The outer side of the rotating gear (505) is connected to a gear ring (506) by rotating through the gear. The gear ring (506) and the rotating gear (505) mesh with each other through tooth grooves.

7. A multi-stage jet slurry mixing device for flue gas desulfurization in a circulating fluidized bed boiler according to claim 6, characterized in that, The gear ring (506) is fixedly connected to a symmetrical fixing frame (507) on the outside. The top of the fixing frame (507) is fixedly connected to the outside of the annular fixing seat (4). The rotating rod (504) is fixedly connected to a baffle plate (508) on the outside. The bottom of the rotating rod (504) is fixedly connected to a baffle blade (509).

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