Desulfurization tower capable of preventing reaction material from being blocked

Abstract

A kind of desulfurization tower preventing reaction blocking, from top to bottom is equipped with flue gas outlet, demister, sprayer, flue gas inlet and liquid discharge port respectively, demister includes several layers of demisting layer, demisting layer includes first demisting layer and second demisting layer arranged at intervals, and the lowermost end of demisting layer is first demisting layer, first demisting layer is equipped with several fairing;Fairing includes upper umbrella cover and lower guide sleeve, second demisting layer is equipped with several fairing, the axis position of fairing on second connecting frame does not coincide with that on first connecting frame.This desulfurization tower guides mist particle to experience the change of upward-to-oblique downward-to-upward-to-oblique downward constantly by first demisting layer and second demisting layer arranged at intervals, and multiple impact inner wall of fairing, thereby improve demisting effect, and upper umbrella cover and guide sleeve in fairing are vertical or inclined structure, all mist particles will not remain on fairing, and will flow to below, effectively prevent reaction blocking in demister.

Description

Technical Field

[0001] This invention relates to the field of waste gas purification technology, specifically a desulfurization tower that prevents reactant blockage. Background Technology

[0002] The applicant's main products include calcined petroleum coke. Sulfur is one of the impurities affecting the quality of petroleum coke, and a significant desulfurization effect is generally achieved only when the calcination temperature is raised to around 1450℃. The exhaust gas produced after calcination contains sulfur dioxide, which easily escapes into the air and causes air pollution. Therefore, relevant desulfurization processes are necessary before emissions. Traditional desulfurization towers typically use baffle plates as demisters, installed horizontally or vertically within the tower. This allows mist particles to suddenly change direction and collide with the baffle plates during their movement, turning into liquid as more particles are captured. This method is simple in structure and easy to install, but it requires a certain flow rate and cannot be too fast. Furthermore, the desulfurization absorption circulating liquid contains absorbent particles, dust, and desulfurization products, so these particles adhere to the baffle plates when they capture mist particles, gradually forming scale and clogging, affecting subsequent efficiency. Therefore, the applicant has improved the desulfurization tower used for flue gas desulfurization after petroleum coke calcination. Summary of the Invention

[0003] To address the technical problems existing in the background art, the present invention provides a desulfurization tower that prevents reactant blockage.

[0004] The technical solution of this invention is as follows:

[0005] A desulfurization tower designed to prevent reactant blockage has a flue gas outlet, a demister, a sprayer, a flue gas inlet, and a liquid outlet, arranged from top to bottom. Flue gas enters the desulfurization tower through the flue gas inlet, passes through the sprayer and the demister, and is then discharged from the flue gas outlet.

[0006] The demister includes several demister layers, each including a first demister layer and a second demister layer spaced apart, with the bottom of the demister layer being the first demister layer.

[0007] The first demisting layer includes a first outer connecting plate for connecting to the inner wall of the desulfurization tower. The inner side of the outer connecting plate is provided with a first connecting frame. The first connecting frame includes several parallel connecting rods. Several placement rings are equally spaced on the connecting rods. A flow guide is inserted into the placement ring.

[0008] The fairing includes an upper canopy and a lower guide sleeve. The upper canopy is larger than the guide sleeve. The upper canopy and the guide sleeve are connected by multiple reinforcing rods.

[0009] The horizontal distance between the upper umbrella edges of adjacent guide hoods on a single connecting rod is no more than 2cm, and the maximum horizontal distance between the upper umbrella edges of any two adjacent guide hoods on adjacent connecting rods is no more than 2cm, so as to ensure that the lower layer of flue gas will not drift too far after flowing out from the upper umbrella edge of the guide hood, and is convenient to enter the area below the upper guide hood.

[0010] The second demister layer includes a second outer connecting plate and an outer ring plate. The second outer connecting plate connects to the inner wall of the desulfurization tower. The outer ring plate has a ring-shaped structure with a hollow interior. One end is fixed to the second outer connecting plate, and the other end slopes inward and downward. Flue gas drifting upward from the lower first demister layer near the inner wall of the desulfurization tower is obstructed by the outer ring plate and flows inward, smoothly entering the second demister layer for demisting. Furthermore, the multiple layers of the second demister layer, spaced apart, continuously guide the flue gas from the edge of the desulfurization tower back to the center, thereby improving demisting efficiency.

[0011] Furthermore, a second connecting frame is provided on the inner side of the outer ring plate. The second connecting frame includes several parallel connecting rods, with several placement rings evenly spaced on the connecting rods. A guide hood is inserted into each placement ring. The guide hood on the second connecting frame does not coincide with the axis of the guide hood on the first connecting frame, and the area where the vertical projection of any guide hood on the second connecting frame intersects with the vertical projection of any guide hood on the first connecting frame is no greater than half the area of ​​the vertical projection of the guide hood. This allows the upper guide hood to be positioned more above the empty space between the lower guide hoods, providing secondary guidance for the mist. If the area where the vertical projection of any guide hood on the second connecting frame intersects with the vertical projection of any guide hood on the first connecting frame is too large, the two will be closer together, making it easier for the smoke from other adjacent guide hoods to drift past the upper guide hood.

[0012] Through multiple layers of demisters, the flue gas after desulfurization encounters the upper umbrella cover in the guide hood repeatedly as it moves upward, thus changing direction multiple times and increasing the number of times it impacts the upper umbrella cover. This eliminates the constraints of flue gas flow velocity, resulting in highly efficient demisting. Simultaneously, the mist particles accumulated on the upper umbrella cover converge into liquid and drip down from the outer edge. As they drip downwards, they continuously fall onto the surface of the lower upper umbrella cover, accumulating more liquid and rolling down along the edge of the upper umbrella cover. This process prevents residual reactive particles from remaining in the demister layers, thus preventing clogging of the demister.

[0013] To ensure effective demisting, the demisting layer should consist of at least three layers: the bottom layer is the first demisting layer, the middle layer is the second demisting layer, and the top layer is the first demisting layer. Alternatively, additional second and first demisting layers can be added upwards at intervals to further enhance the demisting effect. The specific layer configuration depends on the height of the desulfurization tower and the composition of the flue gas to be desulfurized.

[0014] To ensure that the flue gas emanating from the lower demister layer can enter the center of the upper demister layer's guide hood as much as possible—because the contact area between the mist and the upper canopy increases as the mist moves outward from the center of the guide hood towards the edge of the upper canopy—this application specifically designs the positional relationship of the guide hoods in the first and second demister layers.

[0015] Specifically, the center line connecting the adjacent connecting rods of the first and second demisting layers is perpendicular to the connecting rod. The upper edge of the guide hood near the inner wall of the desulfurization tower is cut to fit the shape of the inner wall. This results in the guide hoods on both the first and second demisting layers being arranged in a rectangular array. Furthermore, since the guide hoods are of the same size, it is convenient to place the upper guide hood above the intersection of the lower guide hoods, allowing the upward-dispersing mist from the lower layer to enter the center of the upper guide hood.

[0016] As a preferred embodiment, all guide hoods on the first connecting frame are at the same height, and all guide hoods on the second connecting frame are at the same height. This facilitates control of the airflow direction from the edges of the guide hoods. It also causes the mist flowing from four adjacent guide hoods to counteract each other, increasing the condensation speed of the mist particles and converging the mist from the four adjacent guide hoods towards a central arrangement equidistant from these four guide hoods.

[0017] Furthermore, an airflow convergence area is formed at the center of the four adjacent guide hoods on the adjacent connecting rods of the first demisting layer, and an airflow convergence area is formed at the center of the four adjacent guide hoods on the adjacent connecting rods of the second demisting layer. The guide hood of the middle layer of the second demisting layer is located above the airflow convergence area of ​​the bottommost layer of the first demisting layer, and the guide hood of the topmost layer of the first demisting layer is located above the airflow convergence area of ​​the middle layer of the second demisting layer. This ensures that when the flue gas from adjacent demisting layers rises, it can enter the bottom of the upper guide hood in the largest possible quantity, thereby increasing the number and duration of collisions between the mist and the guide hood.

[0018] The lowest layer, the first demister, serves as the basic flow guiding layer. It should be equipped with as many flow guiding hoods as possible. The shape of the upper umbrella-shaped hoods near the inner wall of the desulfurization tower can be appropriately tailored to fit the shape of the inner wall. If there is enough space near the inner wall to accommodate half a flow guiding hood, it should be installed. The adjacent second demister needs to address the issue of vertical drift of mist rising from the edge of the first demister. Therefore, an outer ring plate is required to obstruct this. The width of the outer ring plate is 0.3-0.6 times the maximum size of the upper umbrella-shaped hood to accommodate the flow guiding hoods at the edge of the desulfurization tower. Corresponding clearance holes are provided on the outer ring plate at the position where it overlaps with the guide sleeve.

[0019] Regarding the shape and arrangement of the air deflector, this is another inventive point of this application. The upper canopy is designed as an umbrella-shaped structure, with a high center and low outer edges, which facilitates the slow convergence of mist particles after impacting the inner wall of the upper canopy, allowing them to flow down from the edges of the upper canopy under the influence of gravity. The guide sleeve is located below the center of the upper canopy, and the outer dimensions of the guide sleeve match the inner dimensions of the placement ring. The guide sleeve serves two purposes: one is as a positioning device, facilitating the insertion of the entire air deflector onto the connecting rod without the need for bolts or welding, thus simplifying installation and disassembly; the other is to guide the mist into the area below the center of the upper canopy. The hollow guide sleeve faces the lower airflow convergence area, and a large amount of mist flows into the area below the air deflector along the guide sleeve. Furthermore, since the upper canopy and guide sleeve are vertical or inclined structures, all mist particles will not remain on the air deflector and will flow downwards.

[0020] Preferably, the upper canopy's orthographic projection is circular, with its edges drooping downwards, and the bottom of the upper canopy is lower than the top of the guide sleeve. This prevents the fog entering below the center of the upper canopy along the guide sleeve from immediately escaping horizontally from the edge of the upper canopy. Due to the height difference, it will inevitably collide twice with the center and sidewall of the upper canopy, thereby improving the defogging effect.

[0021] To facilitate the insertion of the fairing into the connecting rod, the height of the connection end between the reinforcing rod and the guide sleeve should not be less than half the height of the guide sleeve. Since the bottom ends of multiple reinforcing rods are connected to the guide sleeve, after the guide sleeve is inserted into the placement ring of the connecting rod, the bottom ends of the reinforcing rods will inevitably be engaged with the outside of the placement ring, thus naturally fixing the fairing within the placement ring. By ensuring that the height of the connection end between the reinforcing rod and the guide sleeve is not less than half the height of the guide sleeve, the stability of the guide sleeve after insertion into the placement ring is guaranteed, preventing it from being blown off by strong airflow.

[0022] To further save space occupied by the demister in the desulfurization tower, in adjacent demister layers, the lowest point of the guide sleeve in the upper layer is not higher than the highest point of the guide sleeve in the lower layer. This further reduces the height of the multiple demister layers, which not only facilitates their arrangement in the demister but also ensures that the mist undergoes continuous upward-downward-upward-downward changes as it passes through the multiple demister layers, repeatedly impacting the guide shroud and thus improving the demister effect.

[0023] Through the above design, the desulfurization tower of this invention, which prevents reactant blockage, improves the demisting effect by designing the demister as a multi-layered structure. The first and second demisters, spaced apart, guide mist particles through a continuous upward-downward-upward-downward transition, causing them to repeatedly impact the inner wall of the guide shroud. Furthermore, the upper umbrella cover and guide sleeve in the guide shroud are vertical or inclined, ensuring that all mist particles flow downwards without remaining on the guide shroud, effectively preventing reactant blockage in the demister. Attached Figure Description

[0024] In the attached diagram:

[0025] Figure 1 This is a schematic diagram of the desulfurization tower.

[0026] Figure 2 This is a schematic diagram of the demister structure;

[0027] Figure 3 A diagram showing the separate structure of each layer in a demister;

[0028] Figure 4 This is a top view of the first defogging layer;

[0029] Figure 5 This is a top view of the second defogging layer;

[0030] Figure 6 This is a partial top view of the superimposed first and second demisting layers.

[0031] Figure 7 This is a schematic diagram of the fairing structure;

[0032] Figure 8 for Figure 7 Top view;

[0033] The components represented by the various reference numerals in the diagram are:

[0034] 1. First demisting layer; 11. Outer connecting plate; 12. First connecting frame; 13. Placement ring; 2. Second demisting layer; 21. Outer ring plate; 22. Second connecting frame; 3. Deflector; 31. Upper umbrella cover; 32. Guide sleeve; 33. Reinforcing rod; 4. Airflow gathering area. Detailed Implementation

[0035] See Figure 1 As shown, a desulfurization tower for preventing reactant blockage has a flue gas outlet, a demister, a sprayer, a flue gas inlet, and a liquid outlet from top to bottom. The flue gas enters the desulfurization tower from the flue gas inlet, and is discharged from the flue gas outlet after passing through the sprayer and the demister.

[0036] The demister comprises several demister layers, including a first demister layer 1 and a second demister layer 2 spaced apart, with the first demister layer 1 being the lowest layer. This embodiment uses a three-layer demister system as an example, with the first demister layer 1 at the bottom, the second demister layer 2 in the middle, and the first demister layer 1 at the top. Of course, additional second demister layers 2 and first demister layers 1 can be spaced upwards to improve the demister effect. The specific arrangement depends on the height of the desulfurization tower and the composition of the flue gas to be desulfurized.

[0037] The following is combined with Figures 2-4The first demister layer 1 includes a first outer connecting plate 11 for connecting to the inner wall of the desulfurization tower. A first connecting frame 12 is provided on the inner side of the outer connecting plate 11. The first connecting frame 12 includes several parallel connecting rods, and several placement rings 13 are evenly spaced on the connecting rods. A flow guide shroud 3 is inserted into each placement ring 13. (See also...) Figure 7 and Figure 8 As shown.

[0038] Furthermore, the fairing 3 structure includes an upper umbrella cover 31 and a lower guide sleeve 32. The guide sleeve 32 is a vertically arranged hollow cylindrical structure, and the upper umbrella cover 31 is a circular umbrella-shaped structure with a high center and low edges, and its size is larger than that of the guide sleeve 32. The upper umbrella cover 31 and the guide sleeve 32 are connected by multiple reinforcing rods 33. After the mist enters from the lower part of the guide sleeve 32, it will at least have a first collision with the top of the upper umbrella cover 31.

[0039] As a preferred embodiment, the bottom of the upper umbrella cover 31 is lower than the top of the guide sleeve 32. This prevents the mist entering the center of the upper umbrella cover 31 along the guide sleeve 32 from immediately escaping horizontally from the edge of the upper umbrella cover 31. Due to the height difference, the mist will inevitably collide with the center of the upper umbrella cover 31 and then with the side wall of the upper umbrella cover, thus improving the demisting effect. Moreover, lowering the edge of the upper umbrella cover 31 below the top of the guide sleeve 32 causes the mist particles to be blown diagonally downwards along the slope of the upper umbrella cover, further reducing the rising height of the mist particles. Each time a mist particle passes through a guide hood 3, it only rises a small height. In this way, multiple demisting layers can be arranged in the limited space of the desulfurization tower to improve the demisting effect.

[0040] Furthermore, as a design feature of this application, the edges of the upper umbrellas 31 of the several guide hoods 3 inserted on the first connecting frame 12 are at the same height, and the horizontal distance between the edges of the upper umbrellas 31 of adjacent guide hoods 3 on a single connecting rod is 0, and the horizontal distance between the edges of the upper umbrellas 31 of any two adjacent guide hoods 3 on adjacent connecting rods is 0. This ensures that the edges of the upper umbrellas 31 of any two adjacent guide hoods 3 on the first demisting layer 1 are connected to each other, so as to ensure that the lower layer flue gas does not drift too far after flowing out from the edge of the upper umbrellas 31 of the guide hood 3, and is convenient to enter the area below the upper guide hood 3.

[0041] The following is combined Figure 5 and Figure 6The second demister layer 2 includes a second outer connecting plate 11 and an outer ring plate 21. The second outer connecting plate 11 is used to connect to the inner wall of the desulfurization tower. The outer ring plate 21 has an annular structure with a hollow interior. One end of the outer ring plate 21 is fixed to the second outer connecting plate 11, and the other end is inclined inward and downward. The flue gas drifting upward from the side of the first demister layer 1 near the inner wall of the desulfurization tower is obstructed by the outer ring plate 21, resulting in a third collision with the outer ring plate 21. The flue gas then flows inward along the inclined direction of the outer ring plate 21 and smoothly enters the second demister layer 2 for demisting. In addition, the multiple layers of the second demister layer 2 arranged at intervals can continuously guide the flue gas at the edge of the desulfurization tower back to the center of the desulfurization tower. After all, the density and coverage of the guide hood in the center of the desulfurization tower are greater than those at the edge of the desulfurization tower, thus improving the demisting efficiency.

[0042] Furthermore, a second connecting frame 22 is provided on the inner side of the outer ring plate 21. The structure of the second connecting frame 22 is similar to that of the first connecting frame 11, and it also includes several parallel connecting rods. Several placement rings 13 are equally spaced on the connecting rods, and a guide hood 3 is inserted into the placement ring 13. It is worth noting that the guide hood 3 on the second connecting frame 22 does not coincide with the axis position of the guide hood 3 on the first connecting frame 12, and the intersection area of ​​the vertical projection of any guide hood 3 on the second connecting frame 22 and the vertical projection of any guide hood 3 on the first connecting frame 12 is not greater than half of the vertical projection area of ​​the guide hood 3. This allows the upper guide hood 3 to be located more above the empty space between the lower guide hoods 3, thus providing secondary guidance for the mist. If the intersection area of ​​the vertical projection of any guide hood 3 on the second connecting frame 22 and the vertical projection of any guide hood 3 on the first connecting frame 12 is too large, the two will be closer together, making it easier for the smoke in other adjacent guide hoods 3 to drift away over the upper guide hood 3.

[0043] Through multiple layers of demisters, the flue gas after desulfurization encounters the upper umbrella cover 31 in the guide hood 3 repeatedly as it moves upward, thus changing direction multiple times and increasing the number of times it impacts the upper umbrella cover 31. This eliminates the constraint of flue gas flow velocity, resulting in highly efficient demisting. Simultaneously, the mist particles accumulated on the upper umbrella cover 31 converge into liquid and drip down from the outer edge. As they drip downwards, they continuously fall onto the upper surface of the lower upper umbrella cover 31, accumulating more liquid and rolling down along the edge of the upper umbrella cover 31. During the mist particle replenishment process, no residual reactive particles remain trapped in the demister layers, preventing clogging of the demister.

[0044] To ensure that the flue gas emanating from the lower demisting layer can enter the center of the upper demisting layer guide hood 3 as much as possible, since the contact area between the mist and the upper umbrella 31 increases as the mist moves outward from the center of the guide hood 3 to the edge of the upper umbrella 31, thus accumulating more mist particles and improving the demisting effect, this application specifically designs the positional relationship of each guide hood 3 in the first demisting layer 1 and the second demisting layer 2.

[0045] See Figure 6 As shown, Figure 6 A partial view shows the superimposed state of the first demisting layer 1 and the second demisting layer 2. The design ensures that the center line connecting the adjacent connecting rods of the first and second demisting layers 1 and 2 is perpendicular to the connecting rod. The edge of the upper umbrella cover 31 of the guide hood 3 near the inner wall of the desulfurization tower is cut to fit the shape of the inner wall of the desulfurization tower. This results in all guide hoods 3 on the first and second demisting layers 1 and 2 being arranged in a rectangular array. Furthermore, since the guide hoods 3 are of the same size, it is convenient to place the upper guide hood 3 above the intersection of the lower guide hoods 3, allowing the upward-dispersing mist from the lower layer to enter the center of the upper guide hood 3.

[0046] As a preferred embodiment, all the guide hoods 3 on the first connecting frame 12 are at the same height, and all the guide hoods 3 on the second connecting frame 22 are at the same height. This facilitates control of the direction of the flue gas flowing out from the edge of the guide hood 3. It also causes the mist flowing out from four adjacent guide hoods 3 to counteract each other, increasing the speed of mist particle condensation and converging the mist flowing out from the four adjacent guide hoods 3 towards a center equidistant from these four guide hoods 3.

[0047] Furthermore, an airflow convergence area 4 is formed at the center of four adjacent guide hoods 3 on adjacent connecting rods of the first demisting layer 1, and an airflow convergence area 4 is formed at the center of four adjacent guide hoods 3 on adjacent connecting rods of the second demisting layer 2. The guide hood 3 of the middle layer of the second demisting layer 2 is located above the airflow convergence area 4 of the lowest layer of the first demisting layer 1, and the guide hood 3 of the uppermost layer of the first demisting layer 1 is located above the airflow convergence area 4 of the middle layer of the second demisting layer 2. This ensures that when the flue gas from adjacent demisting layers rises, it can enter the lowest part of the upper guide hood 3 in the largest quantity, thus repeatedly impacting the top of the upper umbrella cover 31 from the center of the guide sleeve, then impacting the side wall of the upper umbrella cover 31, and then being blown diagonally downwards along the inclined direction of the upper umbrella cover 31, colliding with the mist discharged from the adjacent upper umbrella cover 31, thereby changing direction and further converging at the airflow convergence area 4 of that layer, and rising below the upper guide hood 3. This increases the number and duration of impacts between the mist and the guide hood 3.

[0048] Regarding the specific arrangement of the guide hoods 3, the lowest first demister layer 1 serves as the basic guide layer, with as many guide hoods 3 as possible arranged. The shape of the upper umbrella 31 of the guide hoods 3 near the inner wall of the desulfurization tower can be appropriately cut to adapt to the shape of the inner wall of the desulfurization tower. As long as there is enough space near the inner wall of the desulfurization tower to accommodate 1 / 2 of a guide hood 3, it should be arranged. The adjacent second demister layer 2 needs to take into account the problem of vertical drift of the mist rising from the edge of the first demister layer 1. Therefore, an outer ring plate 21 needs to be designed to obstruct it. The width of the outer ring plate 21 is 0.3-0.6 times the maximum size of the upper umbrella 31 to meet the usage requirements of the guide hoods 3 at the edge of the desulfurization tower. Corresponding clearance holes are provided on it at the position where it overlaps with the guide sleeve 32.

[0049] For the specific connection method of the fairing 3, please refer to Figure 7 and Figure 8 The upper umbrella 31 of the flow deflector 3 is designed with an umbrella-shaped structure, high in the center and low at the outer edge, which facilitates the slow convergence of mist particles after impacting the inner wall of the upper umbrella 31, and their exit from the perimeter of the upper umbrella 31 under the action of gravity. The guide sleeve 32 is located below the center of the upper umbrella 31, and the outer dimensions of the guide sleeve 32 match the inner dimensions of the placement ring 13. The guide sleeve 32 has two functions here: one is as a positioning device, which facilitates the insertion of the entire flow deflector 3 onto the connecting rod without bolts or welding, making installation and disassembly convenient; the other is to guide the mist into the area below the center of the upper umbrella 31. The hollow guide sleeve 32 faces the lower airflow gathering area 4, and a large amount of mist enters the area below the flow deflector 3 along the guidance of the guide sleeve 32. Furthermore, the upper umbrella 31 and the guide sleeve 32 are vertical or inclined structures, so all mist particles will not remain on the flow deflector 3 and will flow downwards.

[0050] To facilitate the insertion of the flow guide shroud 3 into the connecting rod, the height of the connection end between the reinforcing rod 33 and the guide sleeve 32 is no less than half the height of the guide sleeve 32. Since the bottom ends of multiple reinforcing rods 33 are connected to the guide sleeve 32, after the guide sleeve 32 is inserted into the placement ring 13 of the connecting rod, the bottom ends of the reinforcing rods 33 will inevitably be locked onto the outside of the placement ring 13, thus naturally fixing the flow guide shroud 3 within the placement ring 13. By ensuring that the height of the connection end between the reinforcing rod 33 and the guide sleeve 32 is no less than half the height of the guide sleeve 32, the stability of the guide sleeve 32 after insertion into the placement ring 13 can be guaranteed, preventing it from being blown off by strong airflow. Another important point is that the height of the flow guide shroud 3 can be further reduced, thus facilitating the arrangement of several layers of demisters in the desulfurization tower.

[0051] To further save space occupied by the demister in the desulfurization tower, in adjacent demister layers, the lowest point of the guide sleeve 32 in the upper layer is not higher than the highest point of the guide sleeve 32 in the lower layer. This further reduces the height of the multiple demister layers, which not only facilitates their arrangement in the demister but also allows the mist to continuously undergo upward-downward-upward-downward changes as it passes through the multiple demister layers, repeatedly impacting the guide shroud 3, thereby improving the demister effect.

[0052] In this embodiment, taking a three-layer demisting layer as an example, the flue gas in the desulfurization tower enters from the lower part of the guide sleeve 32 of the first demisting layer 1 and collides with the top of the upper umbrella cover 31 for the first time.

[0053] Then it will collide a second time with the side wall of the upper canopy 31;

[0054] The flue gas drifting upwards near the inner wall of the desulfurization tower is blocked by the outer ring plate 21 and collides with the outer ring plate 21 for the third time.

[0055] Then the flue gas passes through the airflow gathering area 4 of the first demisting layer 1, and after passing upward through the guide sleeve 32, it collides for the fourth time with the top of the upper umbrella cover 31 of the guide hood 3 in the second demisting layer 2.

[0056] Then it collides a fifth time with the side wall of the upper canopy 31;

[0057] Then the flue gas passes through the airflow gathering area 4 of the second demisting layer 2, and after passing upward through the guide sleeve 32, it collides for the sixth time with the top of the upper umbrella cover 31 of the guide hood 3 in the first demisting layer 3 above.

[0058] Then it collides with the side wall of the upper canopy 31 for the seventh time.

[0059] As the mist particles rise, they collide multiple times and condense into water droplets that fall down. Furthermore, the upper umbrella cover 31 and guide sleeve 32 in the flow guide 3 are vertical or inclined structures, so all the mist particles will not remain on the flow guide 3 and will flow downwards, effectively preventing reactants from clogging the demister.

Claims

1. A desulfurization tower for preventing reactant blockage, comprising, from top to bottom, a flue gas outlet, a demister, a sprayer, a flue gas inlet, and a drain outlet, characterized in that, The demister includes several demister layers, each including a first demister layer (1) and a second demister layer (2) spaced apart, with the lowest part of the demister layer being the first demister layer (1). The first demisting layer (1) includes a first outer connecting plate for connecting to the inner wall of the desulfurization tower. The inner side of the first outer connecting plate is provided with a first connecting frame (12). The first connecting frame (12) includes several parallel connecting rods. Several placement rings (13) are provided at equal intervals on the connecting rods. A flow guide (3) is inserted into the placement ring (13). The fairing (3) includes an upper umbrella cover (31) and a lower guide sleeve (32). The upper umbrella cover (31) is larger than the guide sleeve (32). The upper umbrella cover (31) and the guide sleeve (32) are connected by multiple reinforcing rods (33). The horizontal distance between the edges of the upper umbrella (31) of adjacent fairings (3) on a single connecting rod is no more than 2cm, and the maximum horizontal distance between the edges of the upper umbrella (31) of any two adjacent fairings (3) on adjacent connecting rods is no more than 2cm. The second demisting layer (2) includes a second outer connecting plate and an outer ring plate (21). The second outer connecting plate is used to connect with the inner wall of the desulfurization tower. The outer ring plate (21) is a ring structure with an empty interior. One end of the ring plate is fixed on the second outer connecting plate, and the other end is inclined inward and downward. The inner side of the outer ring plate (21) is provided with a second connecting frame (22). The second connecting frame (22) includes several parallel connecting rods. Several placement rings (13) are equally spaced on the connecting rods. A guide hood (3) is inserted in the placement ring (13). The guide hood (3) on the second connecting frame (22) does not coincide with the axis position of the guide hood (3) on the first connecting frame (12). The vertical projection of any guide hood (3) on the second connecting frame (22) and the vertical projection of any guide hood (3) on the first connecting frame (12) intersect in an area no greater than half of the vertical projection area of ​​the guide hood (3). The first demisting layer (1) has an airflow gathering area (4) formed at the center of four adjacent guide hoods (3) on the adjacent connecting rod. The second demisting layer (2) has an airflow gathering area (4) formed at the center of four adjacent guide hoods (3) on the adjacent connecting rod. The guide hood (3) of the second demisting layer (2) in the middle layer is located above the airflow gathering area (4) of the bottom first demisting layer (1), and the guide hood (3) of the top first demisting layer (1) is located above the airflow gathering area (4) of the second demisting layer (2) in the middle layer.

2. The desulfurization tower for preventing reactant blockage according to claim 1, characterized in that, The demisting layer has at least three layers: the bottom layer is the first demisting layer (1), the middle layer is the second demisting layer (2), and the top layer is the first demisting layer (1).

3. A desulfurization tower for preventing reactant blockage according to claim 1, characterized in that, The center line connecting the guide hoods (3) on the adjacent connecting rods of the first demisting layer (1) and the second demisting layer (2) is perpendicular to the connecting rod. The edge of the upper umbrella cover (31) of the guide hood (3) near the inner wall of the desulfurization tower is cut to match the shape of the inner wall of the desulfurization tower.

4. A desulfurization tower for preventing reactant blockage according to claim 3, characterized in that, The height of each guide shield (3) on the first connecting frame (12) is the same, and the height of each guide shield (3) on the second connecting frame (22) is the same.

5. A desulfurization tower for preventing reactant blockage according to claim 1, characterized in that, The outer ring plate (21) is 0.3-0.6 times the maximum size of the upper umbrella cover (31), and a corresponding clearance hole is provided on it at the position where it overlaps with the guide sleeve (32).

6. A desulfurization tower for preventing reactant blockage according to any one of claims 1-5, characterized in that, The upper umbrella cover (31) has an umbrella-shaped structure, and the guide sleeve (32) is located below the center of the upper umbrella cover (31). The outer dimensions of the guide sleeve (32) match the inner dimensions of the placement ring (13).

7. A desulfurization tower for preventing reactant blockage according to claim 6, characterized in that, The upper umbrella cover (31) has a circular orthographic projection with its edges drooping downwards, and the bottom of the upper umbrella cover (31) is lower than the top of the guide sleeve (32).

8. A desulfurization tower for preventing reactant blockage according to claim 7, characterized in that, The height of the connection end between the reinforcing rod (33) and the guide sleeve (32) is not less than half the height of the guide sleeve (32).

9. A desulfurization tower for preventing reactant blockage according to claim 7, characterized in that, In adjacent demisting layers, the lowest point of the guide sleeve (32) in the upper layer is not higher than the highest point of the guide sleeve (32) in the lower layer.

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