Flue gas desulfurization dust remover

Abstract

The utility model discloses a flue gas desulfurization dust remover, which belongs to the technical field of waste gas treatment and comprises an outer cylinder, the upper end of the outer cylinder is provided with a top cover, the lower end of the outer cylinder is connected with a conical cylinder, the outer cylinder is communicated with an air inlet pipe, a spraying arm and a first rotational flow plate are mounted in the outer cylinder below the air inlet pipe, the first rotational flow plate is positioned below the spraying arm, and the spraying arm is communicated with a liquid inlet pipe. An inner cylinder is fixed in the outer cylinder, the exhaust pipe is arranged in the inner cylinder in a penetrating manner, an upper port of the inner cylinder is positioned below the first rotational flow plate, a second rotational flow plate is arranged in the inner cylinder, the upper end of the exhaust pipe is positioned above the top cover, and the lower end of the exhaust pipe is positioned in the conical cylinder. According to the equipment, flue gas can be in full contact with spraying liquid, SO2 in the flue gas is more thoroughly neutralized, and the desulfurization effect is improved; meanwhile, the first rotational flow plate and the second rotational flow plate are sequentially used for centrifugally removing large-particle smoke dust, small-particle smoke dust and fog drops in the flue gas, the carrying amount of the small-particle smoke dust and the fog drops by exhausted gas is reduced, and therefore the purification effect is improved.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, specifically relating to a flue gas desulfurization and dust removal device. Background Technology

[0002] Due to its vast reserves and low price, my country's coal has become a primary energy source for industries such as thermal power plants, industrial boilers, and electrolytic aluminum. While coal provides heat, it also produces large amounts of flue gas containing pollutants such as particulate matter and SO2. Direct emissions would pollute the surrounding environment. With increasingly stringent environmental regulations, most of this gas is treated through desulfurization and dust removal towers before being released.

[0003] The general structure of current desulfurization and dust removal towers is as follows: A cylindrical tower body is used, with the lower end serving as the flue gas inlet and the upper end as the exhaust outlet. Spray arms and swirl plates are installed inside the tower. Alkaline solution mist sprayed from the spray arms neutralizes SO2 and simultaneously wets the flue gas. The swirl effect then centrifuges the heavier droplets and dust particles onto the inner wall of the tower, forming a liquid film. This film eventually flows to the lower end of the tower and is discharged, while the gas, free of flue gas and SO2, is discharged from the exhaust outlet, thus achieving desulfurization and dust removal of the flue gas. Although the above-mentioned desulfurization and dust removal towers provide some purification of the flue gas, the exhaust still contains small-particle dust and some SO2 gas, indicating that the purification effect needs improvement. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a flue gas desulfurization and dust removal device that can improve the purification quality of flue gas.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A flue gas desulfurization and dust removal device is designed, including an outer cylinder, the upper end of which has a top cover and the lower end of which is connected to a cone. The outer cylinder is connected to an air inlet pipe. A spray arm and a first swirl plate are installed in the outer cylinder below the air inlet pipe. The first swirl plate is located below the spray arm. The spray arm is connected to a liquid inlet pipe. The device is characterized in that it also includes an exhaust pipe. An inner cylinder is fixed inside the outer cylinder. The exhaust pipe passes through the inner cylinder. The upper end of the inner cylinder is located below the first swirl plate. A second swirl plate is provided inside the inner cylinder. The upper end of the exhaust pipe is located above the top cover and the lower end is located inside the cone.

[0006] Furthermore, the outer cylinder and the inner cylinder form a first purification chamber, which is constricted from top to bottom.

[0007] Furthermore, the inner cylinder and the exhaust pipe form a second purification chamber, which is constricted from top to bottom.

[0008] Furthermore, the outer cylinder, inner cylinder, and exhaust pipe are coaxially arranged.

[0009] Furthermore, the first swirl plate is installed inside the outer cylinder via an adjustment assembly, which can adjust the tilt angle of the first swirl plate.

[0010] Furthermore, the adjustment assembly includes a hoop that can be fixed to the exhaust pipe. A recessed hole is provided on the outer peripheral wall of the hoop. A first pin is provided at the inner end of the swirl plate and a second pin is provided at the outer end. The first pin is rotatably installed in the recessed hole. A through hole is provided on the outer cylinder. The second pin passes through the through hole. A lever arm is fixed at the outer end of the second pin. A slotted hole is provided on the lever arm. A rotating ring is fitted on the outer cylinder. A pin handle is fixed on the rotating ring. The pin handle is inserted into the slotted hole. The rotating ring is connected to the lifting adjustment mechanism.

[0011] Furthermore, the lifting and adjusting mechanism is a lead screw, one end of which is hinged to a rotating ring, and a nut is fitted on the lead screw, which is connected to a power rotation device.

[0012] Furthermore, it also includes a controller, in which a flow sensor is installed in the air inlet pipe, and the controller controls the power rotation device of the connected power rotation mechanism according to the detection signal of the flow sensor.

[0013] Furthermore, the power rotation device is a servo motor.

[0014] Furthermore, the air inlet pipe is arranged along the tangential direction of the outer cylinder, and the swirling direction formed by the air inlet pipe and the outer cylinder is opposite to the swirling direction of the first swirling plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. Because an inner cylinder is fixed inside the outer cylinder, with the upper end of the inner cylinder located below the first swirl plate and a second swirl plate inside, and the exhaust pipe passing through the inner cylinder with its upper end above the top cover and its lower end inside the cone, the flue gas, after being sprayed by the spray liquid, has its flow path changed under the action of the first swirl plate. This allows the flue gas to fully contact the spray liquid, more thoroughly neutralizing SO2 in the flue gas and improving the desulfurization effect. At the same time, the first and second swirl plates are used sequentially to centrifuge and remove large and small particulate matter and droplets from the flue gas, reducing the amount of small particulate matter and droplets carried by the exhaust gas, thereby improving the purification effect.

[0017] 2. The first purification chamber formed by the outer cylinder and the inner cylinder, and the second purification chamber formed by the inner cylinder and the exhaust pipe, are both designed to be constricted from top to bottom to reduce the flow space of the flue gas, thereby increasing its flow velocity and increasing the centrifugal force of the swirling flow, which helps to further improve the purification effect of the flue gas.

[0018] 3. By designing the outer cylinder, inner cylinder, and exhaust pipe as coaxial, it is beneficial to balance the centrifugal force in the circumferential direction of the first and second purification chambers, thereby further improving the removal rate of smoke and mist droplets.

[0019] 4. Since the first swirl plate is installed inside the outer cylinder through the adjustment component, the adjustment component can adjust the tilt angle of the first swirl plate. The tilt angle of the first swirl plate can be adjusted according to the flow rate of the flue gas to form a more suitable centrifugal force, which is conducive to improving the purification effect of the flue gas.

[0020] 5. This utility model, through an adjustment component with a specific structure, can achieve uniform adjustment of all first swirl plates, which helps to stabilize the swirl.

[0021] 6. The lifting mechanism is made of a screw and nut connected to a power rotation device, which is a mature technology and helps to improve its cost performance.

[0022] 7. Because a flow sensor is installed in the air inlet pipe, the controller controls the connected power rotation mechanism based on the detection signal of the flow sensor. This allows for automatic adjustment of the tilt angle of the first swirl plate according to the flow direction of the flue gas, which not only saves labor costs but also improves the adjustment accuracy, thereby better improving the purification effect of the flue gas.

[0023] 8. Because the air inlet pipe is set along the tangential direction of the outer cylinder, and the swirling direction formed by the air inlet pipe and the outer cylinder is opposite to the swirling direction of the first swirling plate, the airflow can be forced to change its flow path, increase the gas-liquid contact area, and improve the desulfurization effect.

[0024] 9. This utility model has an ingenious design that allows the outer and inner cylinders to work together to remove large and small particles of smoke and dust and mist droplets from the flue gas in sequence, thereby improving the purification effect of the flue gas. It is worth promoting and using in the industry. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 yes Figure 1 View from direction A;

[0027] Figure 3 yes Figure 2 BB section view;

[0028] Figure 4 yes Figure 3 A magnified view of part I in the middle;

[0029] Figure 5 yes Figure 3 CC section view;

[0030] Figure 6 yes Figure 3 DD section view;

[0031] Figure 7 yes Figure 6 Enlarged view of section II in the middle;

[0032] Figure 8 This is the electrical control schematic diagram of this utility model.

[0033] The components in the diagram are labeled as follows: 1. Outer cylinder; 2. Air inlet pipe; 3. Exhaust pipe; 4. Top cover; 5. Liquid inlet pipe; 6. Cone; 7. Support plate; 8. Rotary ring; 9. Spray arm; 10. First swirl plate; 11. Inner cylinder; 12. Second swirl plate; 13. Hoop; 14. First pin; 15. Second pin; 16. Deflector arm; 17. Pin handle; 18. First purification chamber; 19. Second purification chamber; 20. Flow sensor; 19. Controller; 20. Servo motor. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] In this utility model, when in use, the end closer to the ground is defined as the bottom end or lower end, and the other end farther from the ground is defined as the upper end or top end; the side closer to the center of the exhaust pipe 3 is defined as the inner side, and the other side farther from the center of the exhaust pipe 3 is defined as the outer side.

[0036] like Figure 1 and Figure 3 As shown, this utility model comprises an outer cylinder 1, an inner cylinder 11, and an exhaust pipe 3, which are coaxially arranged and relatively fixed from the outside to the inside. The outer cylinder 1 and the inner cylinder 11 form a first purification chamber 18, and the inner cylinder 11 and the exhaust pipe 3 form a second purification chamber 19. Both the first purification chamber 18 and the second purification chamber 19 are constricted from top to bottom. The upper end of the outer cylinder 1 has a top cover 4, and the lower end is connected to a conical cylinder 6. The outer cylinder 1 is connected to an air inlet pipe 2, as shown in the figure. Figure 2 As shown, the air inlet duct 2 is arranged tangentially to the outer cylinder 1, allowing the flue gas entering the outer cylinder 1 from the air inlet duct 2 to form a swirling flow along the inner wall of the outer cylinder 1. This extends the flue gas flow path and also centrifugally removes some large dust particles. Figure 5 and Figure 6As shown, a spray arm 9 and a first swirl plate 10 are installed inside the outer cylinder 1 below the air inlet pipe 2. The spray arm 9 is connected to the liquid inlet pipe 5, which provides the spray arm 9 with a desulfurizing agent that can neutralize SO2. The first swirl plate 10 is located below the spray arm 9, and the swirling direction formed by the air inlet pipe 2 and the outer cylinder 1 is opposite to the swirling direction of the first swirl plate 10, forcing the airflow to turn sharply and change the flow path, increasing the gas-liquid contact area and improving the desulfurization effect. The upper end of the inner cylinder 11 is located below the first swirl plate 10. A second swirl plate 12 is provided inside the second purification chamber 19. Specifically, the outer end of the second swirl plate 12 is connected to the inner wall of the inner cylinder 11, and the inner end is connected to the outer wall of the exhaust pipe 3. The upper end of the exhaust pipe 3 is located above the top cover 4, and the lower end is located inside the cone 6. In this way, the centrifugal force of the first swirl plate 10 throws large particles of smoke and dust and mist droplets in the flue gas toward the inner wall of the outer cylinder 1, and they are collected into a liquid film and discharged downward from the lower opening of the cone 6; while the small particles of smoke and dust and mist droplets located in the middle of the swirl enter the inner cylinder 11, and are swirled and centrifuged again by the second swirl plate 12 to remove the small particles of smoke and dust and mist droplets in the flue gas, thereby improving the purification effect of the flue gas.

[0037] To achieve the adjustment of the tilt angle of the first swirl plate 10, such as Figure 4 and Figure 7 As shown, this utility model also includes an adjustment assembly. The first swirl plate 10 is installed inside the outer cylinder 1 via the adjustment assembly, which can adjust the tilt angle of the first swirl plate 10. Specifically, the adjustment assembly includes a hoop that can be fixed to the exhaust pipe 3. A recessed hole is provided on the outer peripheral wall of the hoop. The inner end of the swirl plate is provided with a first pin 14, and the outer end is provided with a second pin 15. The first pin 14 is rotatably installed in the recessed hole. A through hole is provided on the outer cylinder 1, and the second pin 15 passes through the through hole. A lever arm 16 is fixed to the outer end of the second pin 15. A slotted hole is provided on the lever arm 16. A rotating ring 8 is fitted on the outer cylinder 1. A pin handle 17 is fixed on the rotating ring 8 and inserted into the slotted hole. The rotating ring 8 is hinged to one end of a lead screw. A nut is fitted on the lead screw, and the nut is connected to the shaft of the servo motor 20.

[0038] In order to automatically adjust the tilt angle of the first swirl plate 10 according to the direction of flue gas flow, such as Figure 8 As shown, a flow sensor 20 is also installed in the air inlet duct 2, and the controller 19 controls the servo motor 20 connected to it based on the detection signal from the flow sensor 20. Specifically, a support plate 7 is fixed on the outer wall of the outer cylinder 1, and the motor is mounted on the support plate 7. The tilt angle of the first swirl plate 10 refers to the angle between the plane where the swirl plate is located and the vertical plane. That is, the more vertically the first swirl plate 10 is set, the smaller the tilt angle; conversely, the more horizontally the first swirl plate 10 is set, the larger the tilt angle.

[0039] The working process of this utility model is as follows:

[0040] The flue gas from coal combustion is fed into the inlet pipe 2 by a blower. The flue gas entering the outer cylinder 1 forms a swirling flow under the constraint of the outer cylinder 1. On the one hand, it removes some large dust particles, and on the other hand, after reaching the bottom of the spray arm 9, it can fully contact the atomized spray liquid sprayed by the spray arm 9. After passing through the first swirling plate 10, the swirling direction changes. The rapid change in the swirling direction increases the contact rate between the atomized liquid droplets and the flue gas, thereby more fully neutralizing SO2 in the flue gas. Under the action of centrifugal force of the swirling flow, the larger dust particles and droplets in the flue gas are thrown towards the inner wall of the outer cylinder 1, forming a liquid film on the inner wall of the outer cylinder 1. This film then gathers at the lower end of the cone 6 and is discharged. The smaller dust particles and droplets located in the middle of the swirling flow enter the inner cylinder 11, where they are separated again by centrifugal separation, reducing the amount of dust particles and droplets carried by the flue gas. Finally, the purified flue gas enters the exhaust pipe 3 from below and is discharged.

[0041] During the above process, the flow sensor 20 detects the flue gas flow rate in the air inlet pipe 2 in real time. If the flow rate is too high, the tilt angle of the first swirl plate 10 is appropriately reduced. Conversely, if the flow rate is too low, the tilt angle of the first swirl plate 10 is increased accordingly.

[0042] In addition to the adjustment components with the specific structure described above, a gear transmission method can also be used. That is, a small gear is fixed on the second pin shaft 15, and a large gear meshes with the small gear. Similarly, the large gear can achieve the coordinated and unified adjustment of all the first vortex plates 10. Similarly, in addition to using the servo motor 20 as the power rotation device, ordinary motors and hydraulically driven rotation mechanisms can also be used. However, the servo motor 20 has a more compact structure, which can reduce the installation space.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the scope of the technical solution of this utility model are not permitted.

Claims

1. A flue gas desulfurization dust collector, comprising an outer cylinder, the upper end of the outer cylinder having a top cover, the lower end being connected with a conical cylinder, the outer cylinder being communicated with an air inlet pipe, a spray arm and a first cyclone plate being installed in the outer cylinder below the air inlet pipe, the first cyclone plate being located below the spray arm, the spray arm being communicated with a liquid inlet pipe, characterized in that: The exhaust pipe is arranged in the inner cylinder, the upper end of the exhaust pipe is located above the top cover, and the lower end of the exhaust pipe is located in the conical cylinder.

2. The flue gas desulfurization precipitator according to claim 1, characterized in that: The first purification cavity is formed between the outer cylinder and the inner cylinder and is in a conical shape from top to bottom.

3. The flue gas desulfurization precipitator according to claim 2, characterized in that: The second purification cavity is formed between the inner cylinder and the exhaust pipe and is in a conical shape from top to bottom.

4. The flue gas desulfurization precipitator according to claim 3, characterized in that: The outer cylinder, the inner cylinder and the exhaust pipe are coaxially arranged.

5. The flue gas desulfurization precipitator according to any one of claims 1 to 4, characterized in that: The first rotating flow plate is installed in the outer cylinder through the adjusting assembly, and the adjusting assembly can adjust the inclination angle of the first rotating flow plate.

6. The flue gas desulfurization precipitator according to claim 5, characterized in that: The adjusting assembly comprises a hoop fixed on the exhaust pipe, a concave hole is formed in the outer peripheral wall of the hoop, the inner end of the rotating flow plate is provided with a first pin shaft, and the outer end of the rotating flow plate is provided with a second pin shaft, the first pin shaft is rotatably installed in the concave hole, a through hole is formed in the outer cylinder, the second pin shaft is arranged in the through hole, the outer end of the second pin shaft is fixed with a lever, a slot is formed in the lever, a rotating ring is sleeved on the outer cylinder, a pin handle is fixed on the rotating ring, the pin handle is inserted into the slot, and the rotating ring is connected with the lifting adjusting mechanism.

7. The flue gas desulfurization precipitator according to claim 6, characterized in that: The lifting adjusting mechanism is a lead screw, one end of the lead screw is hingedly connected to the rotating ring, a nut is arranged on the lead screw, and the nut is connected with the power rotating device.

8. The flue gas desulfurization precipitator according to claim 7, characterized in that: The controller is arranged, a flow sensor is arranged in the air inlet pipe, and the controller controls the power rotating device of the power rotating mechanism according to the detection signal of the flow sensor.

9. The flue gas desulfurization precipitator according to claim 8, characterized in that: The power rotating device is a servo motor.

10. The flue gas desulfurization precipitator according to any one of claims 1 to 4, characterized in that: The air inlet pipe is arranged along the tangent direction of the outer cylinder, and the rotating flow direction formed by the air inlet pipe and the outer cylinder is opposite to the rotating flow direction of the first rotating flow plate.

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