An adjustable tube bundle mist eliminator

Abstract

The utility model discloses an adjustable pipe bundle type dust and mist eliminator, including the shell body, the lower portion of shell body is equipped with the air inlet, the top of shell body is welded with six prism boards, and the air outlet is equipped on six prism boards, and the adjustable pipe bundle module is installed on six prism boards, and the adjustable pipe bundle module includes the adjusting plate, and the adjusting plate is equidistantly arranged along the circumference direction of shell body, and the adjusting ring and the limiting ring are rotatably installed on six prism boards, one end of adjusting plate is rotatably connected with limiting ring, and the pull rod is rotatably installed between the other end and adjusting ring, and the driving mechanism is fixedly installed on six prism boards, and the driving mechanism is connected with adjusting ring, and adjusting ring and adjusting plate rotate through motor drive, and the linkage adjusting plate swings synchronously, and the effective cross -sectional area of central airflow passage can be continuously and steplessly adjusted, so that equipment can adapt to different wide range flue gas load variation.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas purification equipment, and in particular to an adjustable tube bundle dust collector and demister. Background Technology

[0002] In the field of industrial flue gas purification, especially in wet desulfurization systems, tube bundle dust collectors and demisters are widely used as efficient gas-liquid separation devices to remove slurry droplets, condensed water droplets, and fine dust particles carried in saturated clean flue gas, in order to meet increasingly stringent environmental emission standards and prevent secondary pollution phenomena such as "gypsum rain".

[0003] Tube bundle dust and mist collectors, as a highly efficient gas-liquid separation and particle capture device, have been widely used in wet desulfurization systems in recent years.

[0004] In actual operation, the load of the flue gas system often fluctuates significantly, such as power plant load changes and start-up and shutdown processes. This causes significant changes in the flue gas flow rate, velocity, and mist concentration entering the demister. When the flue gas flow rate decreases, the flue gas velocity flowing through the fixed channel also decreases. The excessively low velocity weakens the inertial force of the droplets, making it difficult for them to overcome the drag force of the airflow and impact the tube bundle surface. This leads to a significant reduction in the efficiency of the main separation mechanisms such as inertial collision and interception. A large number of fine droplets and dust cannot be effectively removed, resulting in excessive emissions at the outlet. When the flue gas flow rate increases, the flue gas velocity increases significantly. The excessively high velocity not only drastically increases the system's operating resistance pressure drop and consumes more induced draft fan energy, but more importantly, the high-speed airflow will "tear" the liquid film already captured on the tube bundle surface and scatter it away, i.e., the "water dispersion" phenomenon, resulting in severe secondary entrainment of droplets. This also leads to an increase in the outlet mist concentration, forming gypsum rain. Utility Model Content

[0005] This utility model provides an adjustable tubular dust and mist collector, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable tube bundle dust collector and demister includes an outer shell with an air inlet at the bottom and a hexagonal plate welded to the top. An air outlet is located on the hexagonal plate. An adjustable tube bundle module is mounted on the hexagonal plate, comprising an adjustment plate equidistantly spaced along the circumference of the outer shell. An adjustment ring and a limiting ring are rotatably mounted on the hexagonal plate. One end of the adjustment plate is rotatably connected to the limiting ring, and a pull rod is rotatably mounted between the other end of the adjustment plate and the adjustment ring. A drive mechanism is fixedly mounted on the hexagonal plate and connected to the adjustment ring.

[0007] Preferably, the adjusting ring includes an annular plate rotatably mounted on the hexagonal plate, the annular plate having strip grooves spaced apart along the circumference of the annular plate, one end of the pull rod being rotatably connected to the annular plate between adjacent strip grooves, and the other end of the pull rod being rotatably connected to the adjusting plate.

[0008] Preferably, the adjusting plate is an equilateral triangle, and each side of the annular plate is an arc-shaped side.

[0009] Preferably, the limiting ring is concentrically installed inside the annular plate, and the inner diameter of the limiting ring is the same as the diameter of the air outlet.

[0010] Preferably, the driving mechanism includes a motor, a gear is fixedly mounted on the output end of the motor, and toothed grooves are equidistantly opened on the outer edge surface of the annular plate, with the gear meshing with the toothed grooves.

[0011] Preferably, a spray pipe is fixedly installed inside the outer casing, a diverter pipe is fixedly installed on the spray pipe, and a nozzle is fixedly installed on the diverter pipe.

[0012] Preferably, a liquid collection tray with a flow guiding slope is provided at the bottom of the outer casing, a flow guide plate is fixedly installed inside the outer casing, the flow guide plate is located below the air inlet, and a sewage discharge pipe is fixedly installed on the liquid collection tray.

[0013] Preferably, the sewage pipe has a U-shaped section.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This utility model provides an adjustable tube bundle dust collector and demister. By driving the adjustment ring and adjustment plate to rotate with the motor, and linking the adjustment plate to swing synchronously, the effective cross-sectional area of ​​the central airflow channel can be continuously and steplessly adjusted, so that the equipment can adapt to flue gas load changes of different width ranges. Attached Figure Description

[0015] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the adjustable tube bundle module structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the outer shell of this utility model; Figure 4 This is a schematic diagram of the guide plate structure of this utility model.

[0017] In the diagram: 100, outer casing; 110, hexagonal plate; 111, air outlet; 120, air inlet; 130, liquid collection tray; 140, baffle plate; 150, drain pipe; 151, U-shaped section; 200. Adjustable tube bundle module; 210. Adjusting plate; 220. Adjusting ring; 221. Annular plate; 222. Gear groove; 230. Limiting ring; 240. Pull rod; 300. Drive mechanism; 310. Motor; 320. Gear; 400. Spray pipe; 410. Diverter pipe; 420. Nozzle; 500, hydrocyclone; 600, venturi manifold. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention. Example

[0019] Reference Figure 1 - Figure 4An adjustable tube bundle dust collector and demister includes a cylindrical outer shell 100 with a diameter of 450 cm. An air inlet 120 is located at the bottom of the outer shell 100 to introduce wet flue gas to be treated. A hexagonal plate 110 is welded to the top of the outer shell 100, and an air outlet 111 is located on the hexagonal plate 110 through which the treated clean flue gas is discharged. The hexagonal plate 110 is made of corrosion-resistant material to ensure long-term reliability under harsh operating conditions. An adjustable tube bundle module 200 is installed on the hexagonal plate 110. The adjustable tube bundle module 200 includes adjusting plates 210. Specifically, the adjusting plates 210 are equilateral triangles, and each side of the annular plate 221 is an arc-shaped side, making its overall outline approximate a circular sector. Preferably, there are six adjusting plates 210, with their vertices pointing towards the center and their bases facing the inner wall of the outer shell 100. When three adjusting plates 210 are in a fully retracted state, they together form an approximate... The circular central area forms the main channel for flue gas passage. The surface of the regulating plate 210 is specially treated to have high gloss and strong hydrophobicity to reduce droplet adhesion, promote rapid flow of liquid film, and prevent secondary entrainment caused by "water dispersion". The regulating plate 210 is made of corrosion-resistant, high-strength modified polymer material or FRP to meet specific strength and rigidity requirements. The regulating plates 210 are equidistantly arranged along the circumference of the outer shell 100. An regulating ring 220 and a limiting ring 230 are rotatably mounted on the hexagonal plate 110. The limiting ring 230 is fixed to the hexagonal plate 110 by a radial support rod, and its position is completely fixed, serving as a fixed fulcrum for the swing of the regulating plate 210. One end of the regulating plate 210 is rotatably connected to the limiting ring 230, and the other end is rotatably mounted between the regulating ring 220 and the regulating plate 210 by a pull rod 240. A drive mechanism 300 is fixedly mounted on the hexagonal plate 110 and is connected to the regulating ring 220.

[0020] This utility model provides an adjustable tube bundle dust and mist collector. When it detects an increase in flue gas flow rate or a rise in pressure difference, the drive mechanism 300 is activated, driving the regulating ring 220 to rotate. The rotating regulating ring 220 pushes or pulls all the regulating plates 210 synchronously outward around its hinge point with the limiting ring 230 via the pull rod 240. This increases the central flow area enclosed by the regulating plates 210, increasing the effective cross-sectional area, thereby reducing the flue gas velocity. This effectively prevents the already captured droplets from being reformed and re-entrained due to excessive flow velocity, while also reducing the system pressure drop. When the flue gas flow rate decreases or it is necessary to improve the collection efficiency of fine mist droplets, the system can be activated. The drive mechanism 300 drives the regulating ring 220 to rotate in the opposite direction. The regulating ring 220 drives all the regulating plates 210 to move inward synchronously through the pull rod 240. The central flow area is reduced and the effective cross-sectional area is reduced, which increases the flue gas velocity and intensifies the flow field disturbance. This enhances the inertial collision and interception effect, significantly improving the collection efficiency of fine droplets and dust particles. It solves the problem of efficiency decline of traditional fixed demisters at low loads. By precisely controlling the rotation angle of the regulating ring 220, continuous and stepless adjustment of the channel cross-sectional area can be achieved, enabling the equipment to adapt to different wide load operating conditions and always operate in the optimal flow velocity range.

[0021] Referring to the figure, the adjusting ring 220 includes an annular plate 221 rotatably mounted on the hexagonal plate 110. The annular plate 221 has strip grooves 222, which are spaced apart along the circumference of the annular plate 221. One end of the pull rod 240 is rotatably connected to the annular plate 221 between adjacent strip grooves 222, and the other end of the pull rod 240 is rotatably connected to the adjusting plate 210.

[0022] The limiting ring 230 is concentrically installed inside the annular plate 221, and the inner diameter of the limiting ring 230 is the same as the diameter of the air outlet 111.

[0023] The drive mechanism 300 includes a motor 310, a gear 320 is fixedly installed at the output end of the motor 310, and toothed grooves 223 are equidistantly opened on the outer edge surface of the annular plate 221, and the gear 320 is meshed with the toothed grooves 223.

[0024] When an increase in flow area is required, such as when the flue gas flow rate increases, the motor 310 starts, driving the gear 320 to rotate. The gear 320 then drives the adjusting ring 220 to rotate. The rotation of the adjusting ring 220 transmits power through the pull rod 240. Since one end of the pull rod 240 is connected to the apex of the adjusting ring 220 and the other end is connected to the apex of the adjusting plate 210, and one end of the bottom edge of the adjusting plate 210 is connected to the limiting ring 230 through a hinge shaft, the rotation of the adjusting ring 220 pushes or pulls the pull rod 240, forcing the adjusting plate 210 to swing outward around its hinge point with the limiting ring 230. The adjusting plate 210 swings outward synchronously, increasing the effective cross-sectional area of ​​the central circular channel formed by these components, reducing the flue gas velocity, decreasing the pressure drop, and effectively preventing secondary entrainment.

[0025] When a reduction in flow area is required, such as a decrease in flue gas flow or an increase in efficiency, motor 310 drives the regulating ring 220 to rotate in the opposite direction. The regulating ring 220, via pull rod 240, pulls the regulating plate 210 inward around its hinge point with the limiting ring 230. The three regulating plates 210 retract inward simultaneously, reducing the effective cross-sectional area of ​​the central channel, increasing the flue gas velocity and turbulence intensity, significantly enhancing the inertial collision and interception of fine droplets and dust particles, and improving dust and mist removal efficiency. The limit position of the adjustment is defined by the inner diameter of the limiting ring 230, ensuring that the channel is not completely blocked. Example

[0026] The adjustable tube bundle dust collector and demister provided in Example 1 has been further optimized, enhancing the equipment's operational stability, anti-scaling ability, and environmental safety. (Refer to...) Figure 1 and Figure 4 A spray pipe 400 is fixedly installed inside the outer casing 100. A diversion pipe 410 is fixedly installed on the spray pipe 400, and a nozzle 420 is fixedly installed on the diversion pipe 410.

[0027] The bottom of the outer casing 100 is provided with a liquid collection tray 130 with a flow guiding slope. A flow guide plate 140 is fixedly installed inside the outer casing 100. The flow guide plate 140 is located below the air outlet 111. A sewage pipe 150 is fixedly installed on the liquid collection tray 130. In particular, the sewage pipe 150 has a U-shaped part 151.

[0028] It should be noted that the dust removal device also includes a cyclone separator 500 and a venturi manifold 600, both of which are installed on the spray pipe 400. This is existing technology and will not be described in detail here.

[0029] Wet flue gas enters the equipment through inlet 120, and is swirled by hydrocyclone 500. Under the action of centrifugal force, droplets and particles are thrown against the pipe wall and flow downward along the inner wall. After being guided by guide plate 140, they flow into collection tray 130 and are finally discharged through sewage pipe 150. When the preset flushing cycle is reached, the spray system is activated. Water flows through spray pipe 400 to each branch pipe 410. Nozzle 420 sprays high-pressure water onto the inner wall of outer casing 100. The flushing water flows down the pipe wall, washing away the attached dust, gypsum crystals and other deposits. The flushing wastewater and the collected droplets flow into collection tray 130 and are discharged through sewage pipe 150. The U-shaped part 151 of sewage pipe 150 always remains in a liquid-sealed state. Even if there are positive or negative pressure fluctuations inside the equipment, the flue gas cannot leak through the drainage path.

[0030] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An adjustable tubular bundle-type dust collector and demister, comprising a housing (100), characterized in that, An air inlet (120) is provided at the bottom of the outer shell (100). A hexagonal plate (110) is welded to the top of the outer shell (100). An air outlet (111) is provided on the hexagonal plate (110). An adjustable tube bundle module (200) is installed on the hexagonal plate (110). The adjustable tube bundle module (200) includes an adjustment plate (210). The adjustment plate (210) is equidistantly arranged along the circumference of the outer shell (100). An adjustment ring (220) and a limiting ring (230) are rotatably installed on the hexagonal plate (110). One end of the adjustment plate (210) is rotatably connected to the limiting ring (230), and a pull rod (240) is rotatably installed between the other end and the adjustment ring (220). A drive mechanism (300) is fixedly installed on the hexagonal plate (110). The drive mechanism (300) is connected to the adjustment ring (220).

2. The adjustable tube bundle dust collector and demister according to claim 1, characterized in that, The adjusting ring (220) includes an annular plate (221) rotatably mounted on the hexagonal plate (110). The annular plate (221) has a strip groove (222) spaced apart along the circumference of the annular plate (221). One end of the pull rod (240) is rotatably connected to the annular plate (221) between adjacent strip grooves (222), and the other end of the pull rod (240) is rotatably connected to the adjusting plate (210).

3. An adjustable tube bundle type dust collector and demister according to claim 2, characterized in that, The adjustment plate (210) is an equilateral triangle, and each side of the annular plate (221) is an arc-shaped side.

4. An adjustable tube bundle type dust collector and demister according to claim 2, characterized in that, The limiting ring (230) is concentrically installed inside the annular plate (221), and the inner diameter of the limiting ring (230) is the same as the diameter of the air outlet (111).

5. An adjustable tube bundle type dust collector and demister according to claim 2, characterized in that, The drive mechanism (300) includes a motor (310), and a gear (320) is fixedly installed at the output end of the motor (310). The outer edge of the annular plate (221) is provided with tooth grooves (223) at equal intervals, and the gear (320) meshes with the tooth grooves (223).

6. An adjustable tube bundle type dust collector and demister according to claim 1, characterized in that, A spray pipe (400) is fixedly installed inside the outer shell (100), a diverter pipe (410) is fixedly installed on the spray pipe (400), and a nozzle (420) is fixedly installed on the diverter pipe (410).

7. An adjustable tube bundle type dust collector and demister according to claim 6, characterized in that, The bottom of the outer shell (100) is provided with a liquid collection tray (130) with a flow guiding slope. A flow guide plate (140) is fixedly installed inside the outer shell (100). The flow guide plate (140) is located below the air inlet (120). A sewage pipe (150) is fixedly installed on the liquid collection tray (130).

8. An adjustable tube bundle dust collector and demister according to claim 7, characterized in that, The sewage pipe (150) has a U-shaped section (151).

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