Flue gas uniform distribution device suitable for wet desulphurization

Abstract

The invention relates to the technical field of flue gas distribution, and discloses a flue gas uniform distribution device suitable for wet desulphurization, the flue gas uniform distribution device is arranged in an absorption tower and between a flue gas inlet of the absorption tower and a spraying layer of the absorption tower, and the flue gas uniform distribution device comprises a uniform distribution tray and a gas gathering ring from bottom to top; the uniform distribution tray comprises a bearing plate and a splitter plate which are arranged from bottom to top; a plurality of placement openings are uniformly formed in the bearing plate in the axis direction of the bearing plate, and ventilation pipelines are movably arranged at the placement openings; a plurality of shunting areas corresponding to the placing ports are arranged on the shunting plate, and a plurality of shunting holes are formed in the shunting areas. The device has the effect of improving uniform distribution of flue gas.

Description

Technical Field

[0001] The present application relates to the technical field of flue gas distribution, and in particular to a flue gas uniform distribution device suitable for wet desulfurization. Background Art

[0002] Wet flue gas desulfurization (FGD) is currently the mainstream technology for coal-fired flue gas purification. Its core principle is to achieve efficient FGD through the gas-liquid mass transfer reaction between limestone (CaCO3) slurry and sulfur dioxide (SO2). In a wet FGD system, flue gas enters the absorption tower and comes into contact with limestone slurry sprayed downward in a countercurrent. The SO2 is absorbed and converted into calcium sulfite (CaSO3). This is then converted into usable gypsum (CaSO4·2H2O) by a forced oxidation blower with the introduction of air. The purified flue gas passes through a demister to remove droplets before being discharged. The gypsum slurry is then dehydrated to produce gypsum as a byproduct.

[0003] As a key component in wet flue gas desulfurization systems, a uniform distribution tray is typically installed between the absorber's inlet flue and the spray layer. Its core function is to evenly distribute the flue gas, ensuring sufficient contact between the flue gas and the spray slurry, thereby improving desulfurization efficiency. However, existing uniform distribution trays have certain limitations in practical applications.

[0004] Currently, common uniform distribution trays mostly use a fixed aperture or partitioned aperture design. Although this can achieve uniform distribution of flue gas to a certain extent, in actual operation, due to the way the flue gas enters the absorption tower and the influence of its flow characteristics, its uniform distribution effect is often difficult to achieve the ideal state. Specifically, the flue gas inlet of the existing absorption tower is usually set on the side wall of the tower body. After entering the absorption tower, the flue gas will continue to move horizontally for a distance under the action of the airflow before starting to rise. This flow characteristic means that the flue gas is not directly in the central area of ​​the uniform distribution tray during the rising process, but may be offset to other areas of the uniform distribution tray.

[0005] When the flue gas isn't precisely directed toward the center of the uniform distribution tray, its dispersion effect on the flue gas is significantly affected. Since the aperture design of the uniform distribution tray is typically based on the premise that flue gas enters the center of the tray evenly, once the flue gas enters the tray at an offset, the matching degree between the aperture of the uniform distribution hole and the flue gas flow rate will decrease, resulting in the flue gas not being evenly distributed across the tower cross-section. This not only reduces the contact efficiency between the flue gas and the spray slurry, affecting the desulfurization effect, but can also cause local flue gas flow rates to be too fast or too slow, thus affecting the stable operation of the entire desulfurization system.

[0006] Furthermore, the existing uniform distribution tray design lacks adaptability to flue gas flow characteristics. During actual operation, flue gas parameters such as flow rate, velocity, and dust content may vary, and conventional uniform distribution trays struggle to dynamically adjust to these changes, making them unable to meet the flue gas distribution requirements under varying operating conditions. Summary of the Invention

[0007] In order to improve the effect of flue gas uniformity, the present application provides a flue gas uniformity device suitable for wet desulfurization.

[0008] The present application provides a flue gas uniform distribution device suitable for wet flue gas desulfurization, which adopts the following technical solution: A flue gas uniform distribution device suitable for wet flue gas desulfurization, the flue gas uniform distribution device is arranged inside an absorption tower and between the flue gas inlet of the absorption tower and the spray layer of the absorption tower, wherein: The smoke uniform distribution device comprises a uniform distribution tray and a gas gathering ring in the direction from bottom to top; The uniform distribution tray includes a supporting plate and a diverter plate arranged from bottom to top; The carrier plate is provided with a plurality of placement openings evenly arranged along the axis direction of the carrier plate, and ventilation pipes are movably provided at the placement openings; The diversion plate is provided with a plurality of diversion areas corresponding to the placement openings, and the diversion areas are provided with a plurality of diversion holes.

[0009] Optionally, a guide pipe is provided between the ventilation duct and the diverter plate; The guide tube is a flexible hose; One end of the flow guide tube is in communication with the ventilation duct; The other end of the guide tube is arranged in the diversion area on the diversion plate; The diversion holes in the diversion area are all communicated with the corresponding flow guide pipes.

[0010] Optionally, a blocking ring and a guide cone are sealed on one side of the diversion area of ​​the diversion plate close to the supporting plate; The blocking ring is arranged inside the flow guide tube; There are multiple guide cones, and the guide cones are distributed circumferentially along the axis of the diverter hole; The cross section of the guide cone gradually decreases from top to bottom.

[0011] Optionally, a guide rope is connected between the two opposite guide cones; The length of the guide rope is greater than the distance between the two opposite guide cones.

[0012] Optionally, the bottom end of the guide cone approaches the axis direction of the adjacent diversion hole; A plurality of guide grooves are evenly distributed on one side of the guide cone close to the axis of the adjacent diversion hole.

[0013] Optionally, an annular bearing groove is provided on the top of the bearing plate; The carrying tank is provided with a carrying liquid; A buoyancy ring is provided on the outer wall of the ventilation pipe; The buoyancy ring is placed inside the bearing tank, and the material density of the buoyancy ring is less than the density of the bearing liquid.

[0014] Optionally, the axes of the ventilation pipe and the buoyancy ring do not coincide; A limiting ring is provided on the top of the carrying plate; An annular tightening groove is provided on the inner wall of the limiting ring; The buoyancy ring and the abutment groove are plug-fitted; The water level inside the bearing tank is adjustable.

[0015] Optionally, the top of the inner wall of the abutting groove is arranged in a wave shape; The top and bottom of the buoyancy ring are both arranged in a wave shape.

[0016] Optionally, a permanent magnet is embedded in the bottom of the buoyancy ring; Three groups of electromagnets are circumferentially arranged at the bottom of the groove wall of the bearing groove along the axial direction of the bearing groove, and three-phase sinusoidal currents are passed through the three groups of electromagnets to form a rotating magnetic field.

[0017] Optionally, the ventilation duct and the guide pipe are rotatably matched; An air guide ring is provided at the bottom of the ventilation duct; The diameter of the air guide ring gradually increases from top to bottom.

[0018] In summary, this application includes at least one of the following beneficial technical effects: 1. The combined design of the uniform distribution tray and the gas gathering ring evenly distributes the flue gas within the absorber, increasing the contact area between the flue gas and the spray liquid. The uniform distribution tray diverts the flue gas twice through the ventilation duct and the diversion holes on the diverter plate, ensuring uniform dispersion of the flue gas. The gas gathering ring gathers the flue gas and forms a liquid curtain with the spray liquid, further increasing the contact area as the flue gas passes through the liquid curtain. The provision of the guide cone and guide rope also promotes the rapid flow of liquid into the guide pipe and forms a liquid curtain. These structures work together to effectively improve desulfurization efficiency. 2. The gas-gathering ring guides the liquid, reducing the contact time and range between the liquid and the inner wall of the absorber, thereby reducing the possibility of corrosion. The guide cone design reduces the possibility of liquid hanging on the bottom of the manifold and the formation of scale. The swaying of the guide rope also cleans the scale at the bottom of the guide cone. These designs reduce the contact between corrosive liquid and the inner wall and components of the absorber, effectively extending the service life of the absorber and its internal components. 3. The buoyancy ring and electromagnet combine to facilitate adjustment of the ventilation duct's position. The buoyancy ring can be easily rotated and fixed by adjusting the water level in the load tank. Furthermore, a temperature sensor and processor precisely control the buoyancy ring's rotation angle based on the highest temperature position on the distribution tray. The flow guide tube is constructed of special high-temperature and corrosion-resistant materials and features a metal braided layer, enhancing its structural strength and operational stability in harsh environments, ensuring stable operation of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0020] Figure 2 It is a schematic diagram of the gas gathering ring structure in the embodiment of the present application.

[0021] Figure 3 It is a schematic diagram of the uniformly distributed tray structure in an embodiment of the present application.

[0022] Figure 4 It is a schematic diagram of the load-bearing plate structure in an embodiment of the present application.

[0023] Figure 5 It is a schematic diagram showing the position of the insulation surface in the embodiment of the present application.

[0024] Figure 6 yes Figure 5 Enlarged schematic diagram of part A.

[0025] Figure 7 It is a schematic diagram showing the positional relationship between the limiting ring and the tightening groove in the embodiment of the present application.

[0026] Figure 8 It is a schematic diagram showing the positional relationship between the ventilation pipe and the buoyancy ring in an embodiment of the present application.

[0027] Figure 9 It is a schematic diagram of the diverter plate structure in the embodiment of the present application.

[0028] Figure 10 yes Figure 9 Schematic diagram of part B.

[0029] Figure 11 A schematic diagram of the guide cone structure in an embodiment of the present application.

[0030] Description of reference numerals: 1. Absorption tower; 11. Spray layer; 12. Gas gathering ring; 13. Uniform distribution tray; 2. Carrying plate; 21. Placement port; 22. Ventilation duct; 221. Air guide ring; 222. Blocking ring; 23. Carrying trough; 24. Buoyancy ring; 25. Limiting ring; 26. Clamping groove; 27. Insulation cotton; 3. Diverter plate; 31. Diverter hole; 32. Blocking ring; 33. Guide cone; 331. Guide trough; 34. Guide rope; 4. Waterway trough. DETAILED DESCRIPTION

[0031] The following is combined with Figures 1-11 This application is described in further detail.

[0032] The embodiment of the present application discloses a flue gas uniform distribution device suitable for wet desulfurization.

[0033] Example 1 A flue gas distribution device suitable for wet flue gas desulfurization is installed inside an absorption tower 1, and is located between the flue gas inlet of the absorption tower 1 and the spray layer 11 of the absorption tower 1. The flue gas distribution device includes a distribution tray 13 and a gas gathering ring 12, which are installed on the inner wall of the absorption tower 1 from bottom to top.

[0034] After the flue gas enters the absorption tower 1, the flue gas rises with the air flow to the uniform distribution tray 13, and passes through the uniform distribution tray 13, so that the flue gas is evenly distributed, and the distribution range of the flue gas is increased, thereby increasing the contact area between the flue gas and the liquid sprayed by the spray layer 11, further increasing the effect and efficiency of flue gas desulfurization.

[0035] The outer wall of the gas gathering ring 12 is fixedly mounted on the inner wall of the absorption tower 1. The diameter of the gas gathering ring 12 gradually decreases from top to bottom. After the flue gas continues to rise along the tower wall of the absorption tower 1 to the gas gathering ring 12, the outer wall of the gas gathering ring 12 and the inner wall of the absorption tower 1 gather the flue gas.

[0036] The gas gathering ring 12 guides the liquid sprayed on the upper surface of the gas gathering ring 12 so that the liquid flows toward the axis of the absorption tower 1, and then, under the action of its own gravity, it separates from the gas gathering ring 12 and drips onto the uniform distribution tray 13 to contact the flue gas. The gas gathering ring 12 reduces the contact time and range between the sprayed liquid and the inner wall of the absorption tower 1, reduces the possibility of rust on the absorption tower 1, and extends the service life of the absorption tower 1.

[0037] The liquid on the gas gathering ring 12 is on the gas gathering ring 12 and falls in the form of a continuous liquid curtain. After the flue gas escapes from the accommodation range of the gas gathering ring 12, when it enters the inside of the gas gathering ring 12 from the bottom of the gas gathering ring 12, the flue gas will pass through the liquid curtain and blow the liquid curtain into liquid droplets, thereby further increasing the contact area between the flue gas and the liquid and improving the effect of flue gas desulfurization.

[0038] The uniform distribution tray 13 includes a supporting plate 2 and a diverter plate 3. The supporting plate 2 and the diverter plate 3 are fixed to the inner wall of the absorption tower 1. The supporting plate 2 and the diverter plate 3 are arranged from bottom to top, and the center lines of the supporting plate 2, the diverter plate 3 and the absorption tower 1 are parallel to each other.

[0039] The carrier plate 2 is provided with a plurality of placement openings 21, which are evenly distributed on the carrier plate 2 and penetrate the carrier plate 2. Each placement opening 21 is provided with a ventilation duct 22, which is movably mounted on the placement opening 21. The diverter plate 3 is provided with a plurality of diverter areas, which are evenly distributed on the diverter plate 3 and correspond one to one with the placement openings 21. The diverter areas on the diverter plate 3 are provided with a plurality of diverter holes 31, which are evenly distributed in the diverter areas and are all through holes.

[0040] Since the uniformly distributed holes for smoke circulation on the traditional uniformly distributed tray 13 are distributed relatively evenly, the uniformly distributed holes near the area where the rising smoke and the uniformly distributed tray 13 first contact each other have relatively small movement resistance and can directly pass through the uniformly distributed holes at a faster speed. However, when the smoke moves toward the uniformly distributed holes farther away from the area where the rising smoke and the uniformly distributed tray 13 first contact each other, the smoke and the uniformly distributed tray 13 come into contact with each other. During the movement of the smoke, the smoke is affected by the friction resistance with the uniformly distributed tray 13, which reduces the flow rate of the smoke, thereby forming a high flow rate in the center of the area where the smoke and the uniformly distributed tray 13 first contact each other, and a slower flow rate of the smoke farther away from the area where the rising smoke and the uniformly distributed tray 13 first contact each other, which affects the uniform distribution effect of the smoke.

[0041] Before installing the uniform distribution tray 13 in the absorption tower 1, simulation software is used to analyze the absorption tower 1, flue gas flow rate and other related parameters in advance to determine the position where the flue gas first contacts the uniform distribution tray 13 during its rising process. When the flue gas rises vertically, the temperature of the position where the flue gas first contacts the uniform distribution tray 13 is generally the highest.

[0042] Based on the simulation software's prediction of the highest temperature position on the uniform distribution tray 13, the position of the ventilation duct 22 is adjusted so that its axis is as close as possible to the highest temperature point on the uniform distribution tray 13. This facilitates the rapid distribution of smoke into the multiple ventilation ducts 22. Synchronous pipes quickly direct the smoke to the diversion holes 31 in the diversion area farthest from the highest temperature point on the uniform distribution tray 13, thereby evenly distributing the smoke. After the smoke enters the ventilation duct 22, the multiple diversion holes 31 on the diversion plate 3 further divert the smoke, further evenly distributing the smoke and thus improving the overall smoke distribution effect.

[0043] Since the ventilation duct 22 moves toward the highest temperature point of the uniform distribution tray 13, the air inlet end of the ventilation duct 22 is relatively closer to the central area of ​​the smoke. The central area of ​​the smoke is the first contact area between the smoke and the uniform distribution tray 13. The smoke in the central area quickly moves through the ventilation duct 22 to the diversion hole 31 on the uniform distribution tray 13 that is farther away from the central smoke, thereby improving the uniformity of the smoke distribution on the uniform distribution tray 13.

[0044] The ventilation duct 22 relatively reduces the distance and resistance of the smoke moving to the edge position of the uniform distribution tray 13. The edge position of the uniform distribution tray 13 is the position of the uniform distribution tray 13 away from the center area of ​​the smoke. Therefore, the flow velocity error of the smoke passing through the uniform distribution tray 13 is reduced, and the relative uniformity of the smoke flow velocity is further improved.

[0045] In order to facilitate the smoke inside the ventilation duct 22 to quickly reach the diversion holes 31 on the diversion plate 3 for diversion, a guide pipe is also provided between the ventilation duct 22 and the diversion plate 3. In order to facilitate the movement of the ventilation channel inside the placement port 21, the guide pipe is a flexible hose. One end of the guide pipe is connected to the ventilation duct 22, and the other end of the guide pipe is installed on the diversion plate 3. The diversion holes 31 in the same diversion area are all inside the guide pipe, and the diversion holes 31 in the same diversion area are all connected to the guide pipe.

[0046] Each diversion area of ​​the diverter plate 3 is mounted with a blocking ring 32 and a guide cone 33 on the side closest to the carrier plate 2. The diversion holes 31 in the same area are all located inside the blocking ring 32, which is sealed to the diverter plate 3. To facilitate the installation of the guide pipe, the guide pipe is mounted on the outer wall of the blocking ring 32.

[0047] At the same time, since the guide tube is installed on the outer wall of the blocking ring 32, the blocking ring 32 blocks the liquid flowing out of the diversion hole 31, reducing the possibility of the liquid directly flowing onto the supporting plate 2 through the connection of the guide tube.

[0048] Multiple guide cones 33 are provided and distributed circumferentially along the axis of the diverter hole 31. When liquid on the diverter plate 3 flows from the diverter hole 31 into the diverter tube, the guide cones 33 guide the liquid flowing out of the diverter hole 31, facilitating its rapid flow into the diverter tube. This reduces the possibility of liquid flowing out of the diverter hole 31 hanging on the bottom of the diverter plate 3, thereby reducing scale formation.

[0049] The cross section of the guide cone 33 gradually decreases from top to bottom, which makes it easier for the liquid to gather at the bottom of the guide cone 33 and then drip. The liquid flows quickly along the guide cone 33 to the bottom of the guide cone 33, reducing the time the liquid stays on the guide cone 33 and further reducing the possibility of scale formation.

[0050] A guide rope 34 is connected between the two opposing guide cones 33, and the length of the guide rope 34 is greater than the distance between the two opposing guide cones 33. Liquid at the bottom of the guide cone 33 flows onto the guide rope 34, which sways under the action of the flue gas and throws the liquid off the guide rope 34, thereby further increasing the contact area between the flue gas and the liquid and improving the desulfurization effect.

[0051] At the same time, the swinging guide rope 34 cleans the scale generated at the bottom of the guide cone 33, further reducing the possibility of scale accumulation at the bottom of the guide cone 33.

[0052] The bottom of the guide cone 33 is aligned toward the axis of the adjacent diverter hole 31, so that the guide cone 33 around the diverter hole 31 forms a structure similar to the gas focusing ring 12, thereby increasing the contact area between the flue gas and the liquid. To further facilitate the formation of a liquid curtain on the guide cone 33, a plurality of guide grooves 331 are evenly distributed on the side of the guide cone 33 near the adjacent diverter hole 31. The plurality of guide grooves 331 are distributed in a fan-shaped pattern, allowing adjacent guide cones 33 to form a liquid curtain when they are close to each other, further increasing the contact area between the liquid and the flue gas.

[0053] Since the cross-section of the guide cone 33 gradually decreases from top to bottom, and each guide groove 331 is distributed in a fan shape as a whole, the angle between the axis of the guide groove 331 and the side line of the guide cone 33 is increased, which facilitates the flow of liquid inside the guide groove 331. When it flows to the bottom of the guide groove 331, it directly rushes out of the guide groove 331 to form a liquid curtain.

[0054] In order to facilitate the installation of the guide cone 33, the multiple guide cones 33 adjacent to the diversion hole 31 are integrally formed and arranged in a ring shape.

[0055] The top of the carrier plate 2 is provided with an annular carrying groove 23, which is coaxial with the placement port 21. A carrying liquid, which in this embodiment is water, is contained within the carrying groove 23. A buoyancy ring 24 is provided on the outer wall of the ventilation pipe 22. The buoyancy ring 24 is placed within the carrying liquid and has a density less than that of the carrying liquid. The buoyancy ring 24 uses the buoyancy of the carrying liquid to keep the ventilation pipe 22 in a floating state.

[0056] The position of the ventilation pipe 22 is changed by changing the position of the buoyancy ring 24 inside the bearing groove 23 , so as to adjust the position of the ventilation pipe 22 at the placement port 21 .

[0057] The axes of the ventilation pipe 22 and the buoyancy ring 24 are parallel and do not overlap, so the ventilation pipe 22 is in an eccentric state. A limiting ring 25 is provided on the top of the support plate 2. The limiting ring 25 is coaxial with the placement opening 21. The inner wall of the limiting ring 25 is provided with a tightening groove 26. The tightening groove 26 is arranged in an annular shape and is coaxial with the limiting ring 25.

[0058] The water level inside the bearing tank 23 is adjustable, and the buoyancy ring 24 is pluggably mated to the abutment groove 26. To adjust the horizontal position of the ventilation pipe 22, simply rotate the buoyancy ring 24. Once the ventilation pipe 22 is properly positioned, the water level inside the bearing tank 23 is increased, so that the top of the inner wall of the bearing tank 23 restrains the buoyancy ring 24. To rotate the buoyancy ring 24 again, the water level in the bearing tank 23 is lowered, making it easier to rotate the buoyancy ring 24. Furthermore, since the buoyancy ring 24 floats on the bearing liquid, its rotational resistance is further reduced.

[0059] In order to further reduce the rotational resistance of the buoyancy ring 24 , the bottom of the buoyancy ring 24 is arranged in a wavy shape along the axial direction of the buoyancy ring 24 .

[0060] The top of the buoyancy ring 24 is arranged in a wavy shape along the axial direction of the buoyancy ring 24, and the top of the inner wall of the tightening groove 26 is arranged in a wavy shape along the axial direction of the buoyancy ring 24. When the liquid level of the carrying liquid inside the carrying groove 23 rises, since the top of the buoyancy ring 24 and the inner wall of the tightening groove 26 are both arranged in a wavy shape, the wavy convex part of the buoyancy ring 24 enters the wavy concave part of the top of the inner wall of the tightening groove 26, thereby limiting the buoyancy ring 24 and reducing the possibility of the buoyancy ring 24 continuing to rotate.

[0061] To further improve the accuracy of the buoyancy rings 24's rotational position, multiple temperature sensors are installed within the carrier plate 2 and are electrically connected to a processor. The processor analyzes the highest temperature location on the carrier plate 2 and transmits the analysis results to a visual device. Based on the temperature data displayed on the device, the operator can control the rotation angle of each buoyancy ring 24, ensuring that each ventilation duct 22 is within its range of motion and that its axis is closest to the highest temperature location on the uniform distribution tray 13.

[0062] In order to further improve the convenience of the rotation angle, when rotating the buoyancy ring 24, it is generally rotated under the operation of the staff during the installation of the uniformly distributed tray 13 and the shutdown maintenance of the uniformly distributed tray 13, and the rotation angle is determined by the staff's visual inspection, so that the axis of the ventilation pipe 22 is closest to the highest temperature point of the uniformly distributed tray 13, thereby improving the accuracy of the rotation angle of each buoyancy ring 24.

[0063] The temperature sensor does not need to work in real time. To save energy, the temperature sensor can be operated before the machine is shut down for maintenance. The temperature sensor detects the temperature signals at various locations on the uniform distribution tray 13, and the processor analyzes the temperature signals to find the location with the highest temperature, thereby determining the actual location of the highest temperature point on the uniform distribution tray 13. Then, the position of the buoyancy ring 24 is adjusted under the operation of the staff.

[0064] Since the guide tube and the carrier liquid cooperate with each other to block the smoke and the sprayed liquid, the influence of the smoke and the sprayed liquid on the operation of the buoyancy ring 24 is reduced, the cleanliness of the working environment of the buoyancy ring 24 is ensured, and the working stability of the buoyancy ring 24 is ensured.

[0065] To extend the life of the flow guide tube in harsh environments, it is constructed from a special material that is resistant to high temperatures, corrosion, fatigue, and aging. In this embodiment, the tube is constructed from high-performance fluororubber. To further enhance its structural strength, a metal braided layer is incorporated into its outer wall. To ensure operational stability, the braided layer must be replaced during maintenance.

[0066] The carrier plate 2 is equipped with a water channel that communicates with the interior of each carrier tank 23. A controller within the water channel is electrically connected to a processor to control the water level within the carrier tank 23, thereby controlling the rotation of the buoyant plate. Furthermore, the water channel is mounted on the carrier plate 2 to facilitate cooling of the carrier plate 2, reducing the impact of flue gas heat on components mounted on the carrier plate 2. This cooling also slows the evaporation rate of the carrier liquid. The carrier plate 2 is equipped with a water channel trough 4 to house the water channel pipes, improving their placement and stability.

[0067] At the same time, in order to reduce the temperature of the supporting plate 2 , the supporting plate 2 is divided into two layers, and a heat insulating material is provided between the two layers of the supporting plate 2 . In the embodiment of the present application, the heat insulating material is heat insulating cotton 27 .

[0068] Since the buoyancy ring 24 drives the ventilation pipe 22 to rotate, in order to reduce the possibility of excessive twisting of the guide pipe due to the rotation of the ventilation pipe 22 and resulting in blockage of the guide pipe, the ventilation pipe 22 and the guide pipe rotate in coordination.

[0069] In order to further improve the introduction of smoke into the ventilation duct 22, an air guide ring 221 is provided at the bottom of the ventilation duct 22, and the diameter of the air guide ring 221 gradually increases from top to bottom.

[0070] A barrier ring 222 is provided on the outer wall of the ventilation duct 22 . When the buoyancy ring 24 is placed inside the abutment groove 26 , the barrier ring 222 contacts the bottom of the supporting plate 2 , thereby reducing the possibility of smoke entering the supporting groove 23 .

[0071] Example 1 of the present application The implementation principle of a flue gas uniform distribution device suitable for wet flue gas desulfurization is as follows: the flue gas uniform distribution device includes a uniform distribution tray 13 and a gas gathering ring 12, which are installed between the flue gas inlet and the spray layer 11 of the absorption tower 1. After the flue gas enters the absorption tower 1, it rises to the uniform distribution tray 13. The uniform distribution tray 13 evenly distributes the flue gas through multiple ventilation pipes 22 and the diversion holes 31 on the diversion plate 3, thereby increasing the contact area between the flue gas and the spray liquid and improving the desulfurization effect and efficiency. The gas gathering ring 12 is fixed on the inner wall of the absorption tower 1, and its diameter gradually decreases from top to bottom. It gathers the flue gas and guides the liquid, so that the liquid flows close to the axis of the absorption tower 1 and drips to the uniform distribution tray 13 under the action of gravity to contact the flue gas, thereby reducing the contact time between the liquid and the inner wall of the absorption tower 1 and reducing the risk of rust. The liquid on the gas gathering ring 12 will form a continuous liquid curtain. After the flue gas escapes from the gas gathering ring 12, it passes through the liquid curtain and blows the liquid curtain into small droplets, further increasing the contact area. The uniform distribution tray 13 is composed of a supporting plate 2 and a diverter plate 3. The placement port 21 on the supporting plate 2 is used to install the ventilation pipe 22. The diversion area on the diverter plate 3 is provided with a diversion hole 31. The ventilation pipe 22 can achieve uniform distribution of smoke by adjusting the position of the buoyancy ring 24. The guide pipe connects the ventilation pipe 22 and the diverter plate 3. It is a flexible hose that facilitates the movement of the ventilation pipe 22. The blocking ring 32 and the guide cone 33 on the diverter plate 3 guide the liquid to prevent liquid suspension and scale formation. The guide rope 34 at the bottom of the guide cone 33 swings under the action of the smoke, throws out the liquid, increases the contact area and cleans the scale. There is a carrying liquid in the carrying tank 23 on the supporting plate 2, and the buoyancy ring 24 on the outer wall of the ventilation pipe 22 is placed therein. The position of the ventilation pipe 22 is adjusted by rotating the buoyancy ring 24. The guide pipe is made of high-performance fluororubber and has a metal braided layer. The bearing plate 2 is provided with water channels and heat insulation materials. The bottom of the ventilation pipe 22 is provided with an air guide ring 221, and the outer wall is provided with a barrier ring 222 to prevent smoke from entering the bearing groove 23.

[0072] Example 2 Example 2 of the present application differs from Example 1 in that a permanent magnet is embedded in the bottom of the buoyancy ring 24. Three sets of electromagnets are circumferentially positioned along the axis of the inner wall of the bearing slot 23. Three-phase sinusoidal current flows through these three sets of electromagnets to form a rotating magnetic field, similar to a brushless motor. The electromagnets drive the rotation of the buoyancy ring 24, improving its ease of rotation. The processor is also electrically connected to the electromagnets.

[0073] At the same time, since the buoyancy ring 24 needs to rotate slowly in order to reduce excessive rotation due to inertia caused by too fast a rotation speed, the buoyancy ring 24 needs to rotate slowly. After rotating to the set position, the electromagnet is powered off, thereby improving the convenience of rotating the buoyancy ring 24 and saving energy for rotating the buoyancy ring 24.

[0074] The implementation principle of the flue gas uniform distribution device suitable for wet flue gas desulfurization in the embodiment of the present application is to drive the buoyancy ring 24 to rotate by forming a rotating magnetic field, thereby improving the convenience of rotating the buoyancy ring 24.

[0075] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A flue gas uniform distribution device suitable for wet flue gas desulfurization, characterized by: The flue gas uniform distribution device is arranged inside the absorption tower and between the flue gas inlet of the absorption tower and the spray layer of the absorption tower, wherein: The smoke uniform distribution device comprises a uniform distribution tray and a gas gathering ring in the direction from bottom to top; The uniform distribution tray includes a supporting plate and a diverter plate arranged from bottom to top; The carrier plate is provided with a plurality of placement openings evenly arranged along the axis direction of the carrier plate, and ventilation pipes are movably provided at the placement openings; The diversion plate is provided with a plurality of diversion areas corresponding to the placement openings, and the diversion areas are provided with a plurality of diversion holes.

2. A flue gas uniform distribution device suitable for wet desulfurization according to claim 1, characterized in that: A flow guide pipe is provided between the ventilation duct and the diverter plate; The guide tube is a flexible hose; One end of the flow guide tube is in communication with the ventilation duct; The other end of the guide tube is arranged in the diversion area on the diversion plate; The diversion holes in the diversion area are all communicated with the corresponding flow guide pipes.

3. The flue gas uniform distribution device suitable for wet desulfurization according to claim 2, characterized in that: A blocking ring and a guide cone are provided on one side of the diversion area of ​​the diversion plate close to the supporting plate; The blocking ring is arranged inside the flow guide tube; There are multiple guide cones, and the guide cones are distributed circumferentially along the axis of the diverter hole; The cross section of the guide cone gradually decreases from top to bottom.

4. The flue gas uniform distribution device suitable for wet desulfurization according to claim 3, characterized in that: A guide rope is connected between the two opposite guide cones; The length of the guide rope is greater than the distance between the two opposite guide cones.

5. The flue gas uniform distribution device suitable for wet desulfurization according to claim 3, characterized in that: The bottom end of the guide cone approaches the axis direction of the adjacent diversion hole; A plurality of guide grooves are evenly distributed on one side of the guide cone close to the axis of the adjacent diversion hole.

6. The flue gas uniform distribution device suitable for wet desulfurization according to claim 2, characterized in that: An annular bearing groove is provided on the top of the bearing plate; The carrying tank is provided with a carrying liquid; A buoyancy ring is provided on the outer wall of the ventilation pipe; The buoyancy ring is placed inside the bearing tank, and the material density of the buoyancy ring is less than the density of the bearing liquid.

7. The flue gas uniform distribution device suitable for wet desulfurization according to claim 6, characterized in that: The axes of the ventilation pipe and the buoyancy ring do not coincide; A limiting ring is provided on the top of the carrying plate; An annular tightening groove is provided on the inner wall of the limiting ring; The buoyancy ring and the abutment groove are plug-fitted; The water level inside the bearing tank is adjustable.

8. The flue gas uniform distribution device suitable for wet desulfurization according to claim 7, characterized in that: The top of the inner wall of the abutting groove is arranged in a wave shape; The top and bottom of the buoyancy ring are both arranged in a wave shape.

9. The flue gas uniform distribution device suitable for wet desulfurization according to claim 7, characterized in that: A permanent magnet is embedded in the bottom of the buoyancy ring; Three groups of electromagnets are circumferentially arranged at the bottom of the groove wall of the bearing groove along the axial direction of the bearing groove, and three-phase sinusoidal currents are passed through the three groups of electromagnets to form a rotating magnetic field.

10. The flue gas uniform distribution device suitable for wet desulfurization according to claim 9, characterized in that: The ventilation pipe and the guide pipe are rotatably matched; An air guide ring is provided at the bottom of the ventilation duct; The diameter of the air guide ring gradually increases from top to bottom.

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