Rotational flow synergistic tray

Abstract

The utility model provides a rotational flow synergistic tray, which relates to the technical field of flue gas treatment equipment, and comprises a rotational flow area and cofferdams arranged upwards on the edges of the rotational flow area, the rotational flow area comprises a bottom plate and a plurality of rotational flow elements which are uniformly distributed on the bottom plate; a circular blocking area is arranged in the center of the cyclone, a plurality of truncated fan-shaped cyclone blades are arranged on the outer side of the circular blocking area in the circumferential direction, and the truncated fan-shaped cyclone blades are bent upwards along the truncated radius of the truncated fan-shaped cyclone blades to form a spiral shape; and the cyclone directions of the plurality of cyclones on the bottom plate are the same. The cyclone synergistic tower is arranged below a spraying layer or among a plurality of spraying layers in the desulfurization tower in a layered manner, when flue gas passes through the cyclone from bottom to top, the flue gas can be uniformly distributed and the gas-liquid mass transfer can be enhanced, and meanwhile, desulfurization slurry sprayed by the spraying layers can be dynamically and uniformly distributed in the cyclone synergistic tower tray through the flow guide structures of the cyclone synergistic tower tray, so that the desulfurization efficiency is improved. Flue gas short circuit caused by slurry bias current is avoided, and the desulfurization efficiency of the desulfurization tower can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas treatment equipment, and in particular to a swirl-enhancing tower tray. Background Technology

[0002] Wet desulfurization technology has undergone decades of iteration, forming a multi-dimensional optimization system centered on enhanced gas-liquid mass transfer. Early empty tower spray technology suffered from uneven flue gas distribution (15%-20% higher velocity at the center than at the edges) and low liquid-gas contact efficiency (mass transfer area less than 80 m² / m³), resulting in desulfurization efficiencies of only 75%-85%. With increasing demands for desulfurization efficiency, adding a tray layer below the spray layer is currently one of the main upgrade paths for desulfurization technology. Inside the desulfurization tower, the tray not only improves slurry flow and reaction conditions from the slurry side, increasing desulfurization efficiency, but also guides the flue gas to distribute evenly within the tower, ensuring sufficient contact between the flue gas and the slurry, which is beneficial for improving the desulfurization effect.

[0003] Currently, desulfurization trays are mostly round-hole trays with an opening ratio of about 40%. This type of tray offers little improvement in desulfurization efficiency. Cold-state tests revealed that during commissioning, this type of tray exhibits significant slurry flow deviation within a single tray module area. Figure 8 As shown, some areas have no liquid holding capacity at all, causing some flue gas to pass directly through these areas without sufficient contact with the desulfurization slurry for desulfurization reaction, resulting in flue gas short-circuiting and a decrease in desulfurization efficiency.

[0004] Therefore, there is an urgent need to provide a reasonable and efficient tower tray to avoid short-circuiting of flue gas in the desulfurization tower, improve the efficiency of the tower tray, and thus achieve efficient desulfurization in the desulfurization tower. Utility Model Content

[0005] In view of the technical problems existing in the background art, this utility model patent provides a swirl-enhanced tower tray, which, through a unique flow guiding structure, enables the desulfurization slurry to be dynamically and evenly distributed within the module, avoiding flue gas short-circuiting caused by slurry flow deviation, resulting in higher efficiency, and has a simple structure and low manufacturing cost.

[0006] To achieve the above objectives, this utility model provides a swirl-enhancing tray, including a swirl zone and a weir arranged upwards at each edge of the swirl zone;

[0007] The swirling zone includes a base plate and multiple swirling elements evenly distributed on the base plate;

[0008] The center of the cyclone sub-projector is provided with a circular blocking area, and multiple truncated fan-shaped cyclone blades are provided on the outer periphery of the circular blocking area. The multiple truncated fan-shaped cyclone blades are all bent upward in a spiral shape along one of their cut-off radii.

[0009] The multiple swirlers on the base plate have the same swirling direction.

[0010] As a further improvement of this utility model, the swirl zone is provided with reinforcing ribs, which connect the bottom plate and the cofferdam.

[0011] As a further improvement of this utility model, an interval area is provided between both sides of the reinforcing rib and the swirler arrangement area.

[0012] As a further improvement of this utility model, the cofferdam is rectangular, and the upper ends of the two long sides are bent and tightly connected to the upper ends of the two short sides.

[0013] As a further improvement of this utility model, the spacing between each swirler in the swirling region is greater than or equal to 10 mm.

[0014] As a further improvement of this utility model, the diameter of the swirler is set to 60-120 mm.

[0015] As a further improvement of this utility model, the blade shaft width between two adjacent truncated fan-shaped swirl blades is set to 10-20mm.

[0016] As a further improvement of this utility model, the diameter of the circular blocking area at the center of the vortex sub-center is greater than or equal to the blade shaft width between two adjacent truncated fan-shaped vortex blades.

[0017] As a further improvement of this utility model, the truncated fan-shaped swirl blade is bent upward along one of its truncated radii, and the angle between it and the horizontal direction is set to 45-65°.

[0018] As a further improvement of this utility model, the opening ratio of the bottom plate of the swirl zone is 35% to 55%, and the opening ratio of the windward position of the corresponding absorption tower section is 2% to 4% lower than the opening ratio of the remaining area.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] In operation, flue gas flows upward from the bottom of the swirl enhancement tray through the swirl zone, while desulfurization slurry is sprayed from the nozzles above the desulfurization tower onto the swirl enhancement tray. When the flue gas passes through the swirl vanes in the swirl zone, the truncated fan-shaped swirl blades guide the flue gas into an airflow that diverges outward at a 45-65° angle to the horizontal. The liquid holding layer on the swirl zone is also driven by the airflow to exhibit a swirling and diverging state. Due to the presence of multiple swirl vanes in the swirl zone, the combined effect ensures that the liquid holding layer is evenly distributed across the entire cross-section of the swirl enhancement tray, allowing all flue gas to encounter the desulfurization slurry and preventing flue gas short-circuiting. Compared to existing technologies where the dynamic distribution of the liquid holding layer cannot be maintained when the flue gas passes through the tray, resulting in thin or no liquid holding in certain areas and causing flue gas short-circuiting, the swirl enhancement tray of this invention uses small swirl vanes to achieve uniform slurry distribution, which can prevent flue gas short-circuiting and achieve higher desulfurization performance.

[0021] This invention utilizes a swirling flue gas system to agitate some of the liquid holding material into droplets, creating a dense droplet zone approximately 1 meter above the swirling enhancement tray. This enhances gas-liquid mass transfer, thereby improving the desulfurization effect. A portion of the slurry flows out of the swirling enhancement tray through a channel beneath the swirling vanes and enters the slurry pool below the desulfurization tower, maintaining the stability of the liquid holding layer thickness on the tray. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a swirl-enhancing tray disclosed in one embodiment of the present invention;

[0023] Figure 2 This is a plan view of the swirl-enhancing tray disclosed in one embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the swirling vortex distribution in the swirling zone of a swirling enhancement tray disclosed in one embodiment of the present invention;

[0025] Figure 4 This is a structural diagram of a single swirl substructure of a swirl-enhancing tray disclosed in one embodiment of the present invention;

[0026] Figure 5 This invention discloses a method for processing cyclone separators in a cyclone enhancement tray according to one embodiment of the present invention.

[0027] Figure 6 This is an installation position diagram disclosed in one embodiment of the present utility model;

[0028] Figure 7 This is a schematic diagram of the working state of one embodiment of the present utility model;

[0029] Figure 8 This is a schematic diagram of the working state of a conventional desulfurization tower tray disclosed in one embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Reinforcing rib; 2. Cofferdam; 21. Bend section; 3. Swirl zone; 31. Swirl element; 311. Frustrated fan-shaped swirl blade; 312. Circular blocking area; 313. Blade shaft; 314. Bending line; 32. Interval zone. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The present invention will now be described in further detail with reference to the accompanying drawings:

[0036] like Figure 1As shown, this utility model provides a cyclone-enhancing tray, which is an auxiliary desulfurization device for wet desulfurization towers. This device can improve the desulfurization efficiency of the desulfurization tower by uniformly distributing flue gas and enhancing gas-liquid mass transfer. The cyclone-enhancing tray is suitable for use in wet flue gas desulfurization towers in boilers, steelmaking, aluminum smelting, shipbuilding, and other chemical and non-electrical plants. It is modularly assembled and can be arranged in a single layer or multiple layers. It can be placed below the spray layer or between multiple spray layers (e.g., ...). Figure 6 As shown), it includes a swirling zone 3 and a cofferdam 2 with each edge of the swirling zone 3 facing upward. The swirling zone 3 is provided with reinforcing ribs 1, which connect the bottom plate and the cofferdam 2.

[0037] like Figure 2 , 3 As shown, the swirl zone 3 includes a bottom plate and a plurality of swirl elements 31 uniformly distributed on the bottom plate;

[0038] like Figure 4 As shown, the vortex generator 31 has a circular blocking area 312 at its center, and multiple truncated fan-shaped vortex blades 311 are arranged circumferentially on the outer side of the circular blocking area 312. The multiple truncated fan-shaped vortex blades 311 are all bent upward in a spiral shape along one of their cut-off radii.

[0039] like Figure 3 As shown, the multiple swirlers 31 on the base plate have the same swirling direction.

[0040] The swirl enhancement tray is made entirely of 316L stainless steel or higher, preferably 2205 stainless steel, with a material thickness of ≥2mm, preferably 3-5mm. The cofferdam 2 is 5-25cm high, rectangular, and its two long sides are bent at the top to form a bent section 21. The two ends of the bent section 21 are tightly connected to the top of the two short sides, and the bending width is preferably 2-10cm to enhance the overall strength of the swirl enhancement tray. The cofferdam 2 and the swirl zone 3 are preferably integrally bent, but the cofferdam 2 can also be welded or bolted to the edge of the swirl zone 3.

[0041] The swirl-enhancing tray is modularly assembled and can be arranged in a single layer or multiple layers. It can be placed below the spray layer or between multiple spray layers, such as... Figure 6 As shown, during operation, flue gas rises from the bottom of the cyclone enhancement tray, passes through cyclone separator 31 and then through cyclone zone 3, while desulfurization slurry is sprayed from the upper desulfurization tower nozzles onto the top of the cyclone enhancement tray. For example... Figure 7As shown, when flue gas passes through the swirl generator 31 in the swirl zone 3, the truncated fan-shaped swirl blades 311 guide the flue gas into an airflow that diverges outwards at an angle of 45-65° to the horizontal. The liquid holding layer on the swirl zone 3 is also driven by the airflow to exhibit a swirling and diverging state. Due to the presence of multiple swirl generators 31 on the swirl zone 3, the combined effect ensures that the liquid holding layer is evenly distributed across the entire tray cross-section, preventing flue gas short-circuiting. On the other hand, the swirling flue gas blows some of the liquid holding layer into droplets, forming a dense droplet area within approximately 1 meter above the tray, thus enhancing gas-liquid mass transfer. Part of the slurry flows out of the swirl enhancement tray through the channel below the swirl generator 31 blades and enters the slurry pool below the desulfurization tower, maintaining the stability of the liquid holding layer thickness on the tray.

[0042] The preferred embodiment of this utility model is...

[0043] like Figure 1 As shown, the length of the cyclone enhancement tray is less than or equal to 2m, preferably 1 to 1.6m, and the width of the cyclone enhancement tray is less than or equal to 1.5m, preferably 0.7 to 1m.

[0044] The number of reinforcing ribs 1 is related to the length and thickness of a single swirl enhancement tray, and its number is determined by the overall structural strength of the swirl enhancement tray. Generally, when the material thickness is 3mm, it is preferable to set one reinforcing rib 1 every 0.4 to 0.6m. When the material thickness is 5mm, it is preferable to set one reinforcing rib 1 every 0.6 to 1m.

[0045] A gap 32 is provided between both sides of the reinforcing rib 1 and the area where the cyclone separator 31 is arranged. The width of the gap 32 is 10-50mm. Figure 1 , 2 As shown, no swirlers 31 are placed in the interval region 32.

[0046] The spacing between each swirler 31 in the swirling region 3 is greater than or equal to 10 mm, and the diameter of a single swirler 31 is preferably 60 to 120 mm.

[0047] Furthermore,

[0048] Each swirler 31 preferably has four truncated fan-shaped swirling blades 311 arranged circumferentially on the outer side of the circular blocking area 312, such as... Figure 5 As shown, the width of the blade shaft 313 between two adjacent truncated fan-shaped swirl blades 311 is set to 10-20 mm.

[0049] like Figure 5 As shown, in the cyclone separator 31 of the cyclone enhancement tray, the truncated fan-shaped cyclone blade 311 uses one of its cut-off radii as a bending line 314, and bends upward along this bending line 314. It is preferably made by stamping and folding. After bending, the truncated fan-shaped cyclone blade 311 forms an angle with the horizontal direction (e.g., ...). Figure 4(As shown) is 45-65°.

[0050] Furthermore,

[0051] The diameter of the circular blocking area 312 at the center of the vortex 31 is preferably 20-40 mm, and its selected size is greater than or equal to the width of the blade shaft 313 between two adjacent truncated fan-shaped vortex blades 311.

[0052] As a preferred option,

[0053] The opening ratio of the bottom plate of the swirl zone 3 is 35% to 55%. When it is arranged on the cross-section of the absorption tower, the flue gas velocity is high at the windward position. The opening ratio of this position should be reduced. Preferably, the opening ratio of the windward position of the corresponding absorption tower cross-section is 2% to 4% lower than the opening ratio of the remaining area.

[0054] Example:

[0055] The working principle of this swirl-enhanced tray is as follows:

[0056] like Figure 6 As shown, the cyclone enhancement tray is assembled in a modular manner and arranged in a single layer below the spray layer inside the desulfurization tower. The flue gas passes upward from the bottom of the cyclone enhancement tray through the cyclone zone 3, and the desulfurization slurry is sprayed from the nozzle of the upper desulfurization tower to the top of the cyclone enhancement tray.

[0057] like Figure 7 As shown, when the flue gas passes through the swirl element 31 of the swirl zone 3, the truncated fan-shaped swirl blades 311 guide the flue gas into an airflow that diverges in all directions at an angle of 46 to 65 degrees to the horizontal direction. The liquid holding layer on the swirl zone 3 is also driven by the airflow to present a swirling and diverging state.

[0058] Because there are multiple swirlers 31 on the swirling zone 3, the combined effect allows the liquid holding layer to be evenly distributed across the entire tray cross-section, ensuring that all flue gas passing through the swirlers 31 can come into contact with the desulfurization gas on the upper side of the swirlers 31, thus avoiding flue gas short-circuiting.

[0059] The rising flue gas in the swirling flow blows some of the liquid holding on the bottom plate of the swirling enhancement tray into droplets, forming a dense droplet zone within a range of about 1m above the swirling enhancement tray, thus enhancing gas-liquid mass transfer.

[0060] Part of the desulfurization slurry flows out of the swirl enhancement plate through the channel below the truncated fan-shaped swirl blade 311 of the swirl rotor 31 and enters the slurry pool below the desulfurization tower to maintain the stability of the liquid holding layer thickness on the tower tray.

[0061] Advantages of this utility model:

[0062] In operation, flue gas flows upward from the bottom of the swirl enhancement tray through the swirl zone, while desulfurization slurry is sprayed from the nozzles above the desulfurization tower onto the swirl enhancement tray. When the flue gas passes through the swirl elements in the swirl zone, the truncated fan-shaped swirl blades guide the gas into an airflow that diverges outwards at a 45-65° angle to the horizontal. The liquid-holding layer in the swirl zone is also driven by the airflow to exhibit a swirling and diverging state. Due to the presence of multiple swirl elements in the swirl zone, the combined effect ensures that the liquid-holding layer is evenly distributed across the entire cross-section of the swirl enhancement tray, allowing all flue gas to encounter the desulfurization slurry and preventing the flue gas from... Short circuits, unlike existing technologies where flue gas cannot maintain dynamic distribution of the liquid layer when passing through the tray, resulting in some areas having very thin or no liquid holding, high flue gas velocity, and flue gas resistance of P, while other areas have relatively thick liquid holding, making it difficult for flue gas to pass through, resulting in lower velocity and resistance to passing through the tray and liquid holding layer that is also equal to P. On a tray plane, although the resistance of the two types of areas is the same, their states are different, causing flue gas short circuits. The swirl-enhanced tray of this utility model uses small swirlers to achieve uniform distribution of the slurry, which can avoid flue gas short circuits and achieve higher desulfurization performance.

[0063] This invention utilizes a swirling flue gas system to agitate some of the liquid holding material into droplets, creating a dense droplet zone approximately 1 meter above the swirling enhancement tray. This enhances gas-liquid mass transfer, thereby improving the desulfurization effect. A portion of the slurry flows out of the swirling enhancement tray through a channel beneath the swirling vanes and enters the slurry pool below the desulfurization tower, maintaining the stability of the liquid holding layer thickness on the tray.

[0064] The above are merely preferred embodiments of this utility model and do not limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A swirl-enhanced tray, characterized in that: This includes the swirling zone and the cofferdams erected upwards at each edge of the swirling zone; The swirling zone includes a base plate and multiple swirling elements evenly distributed on the base plate; The center of the cyclone sub-projector is provided with a circular blocking area, and multiple truncated fan-shaped cyclone blades are provided on the outer periphery of the circular blocking area. The multiple truncated fan-shaped cyclone blades are all bent upward in a spiral shape along one of their cut-off radii. The multiple swirlers on the base plate have the same swirling direction.

2. The swirl-enhancing tray according to claim 1, characterized in that: The swirl zone is equipped with reinforcing ribs, which connect the bottom plate and the cofferdam.

3. The swirl-enhancing tray according to claim 2, characterized in that: There are gaps between the reinforcing ribs and the cyclone distribution area on both sides.

4. The swirl-enhanced tray according to claim 1, characterized in that: The cofferdam is rectangular, and the upper ends of the two long sides are bent and tightly connected to the upper ends of the two short sides.

5. The swirl-enhancing tray according to claim 1, characterized in that: The spacing between each swirler in the swirling region is greater than or equal to 10 mm.

6. The swirl-enhanced tray according to claim 1, characterized in that: The diameter of the cyclone is set to 60–120 mm.

7. The swirl-enhanced tray according to claim 1, characterized in that: The blade shaft width between two adjacent truncated fan-shaped swirl blades is set to 10-20 mm.

8. The swirl-enhanced tray according to claim 1, characterized in that: The diameter of the circular blocking area at the center of the cyclone sub-center is greater than or equal to the blade shaft width between two adjacent truncated fan-shaped cyclone blades.

9. The swirl-enhancing tray according to claim 1, characterized in that: The truncated fan-shaped swirl blade is bent upwards along one of its truncated radii, with the included angle with the horizontal direction set to 45-65°.

10. The swirl-enhancing tray according to claim 1, characterized in that: The opening ratio of the bottom plate of the swirl zone is 35% to 55%, and the opening ratio of the windward position of the corresponding absorption tower section is 2% to 4% lower than that of the remaining area.

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