A high-strength air flow distribution plate and desulfurization tower

Abstract

The present invention provides a high-strength air flow distribution plate and a desulfurization tower, comprising: a base plate, on which a plurality of air holes are provided; a reinforcement structure, which is provided on the base plate and protrudes outward relative to the base plate. The outwardly protruding reinforcement structure can improve the strength of the air flow distribution plate itself, and can also increase the surface area of ​​the air flow distribution plate, increase the opening area, and improve the efficiency of flue gas passage. The air flow distribution plate is usually located below a wet dust removal mechanism, and performs flow equalization treatment on the flue gas before the flue gas is wet dust removed. The air flow distribution plate with a reinforcement structure has a larger area for receiving spraying due to the relatively outward protrusion of the reinforcement structure, and more spray liquid adheres to the air flow distribution plate, which increases the contact area and contact efficiency between the spray liquid and the flue gas, thereby enhancing the effect of wet dust removal.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas desulfurization and denitrification equipment structures, and in particular to a high-strength airflow distribution plate and a desulfurization tower. Background Art

[0002] Thermal power plants produce a lot of flue gas during operation, and the flue gas contains pollutants such as sulfur, so there are strict emission standards for flue gas emissions from thermal power plants. With the gradual strengthening of environmental awareness, the emission requirements of thermal power plants are also getting higher and higher. The desulfurization tower is one of the flue gas treatment equipment in thermal power plants. With the innovation of technology, the desulfurization tower needs to be continuously modified so that the flue gas passing through the desulfurization tower can be more efficiently and harmlessly treated.

[0003] The air flow distribution plate is an important structure in the desulfurization tower. There are air holes on the air flow distribution plate. When the flue gas moves from bottom to top in the desulfurization tower, it is evenly divided into several strands through the air holes on the air flow distribution plate, so that the flue gas distribution in the desulfurization tower is more even, and the reaction degree is more uniform during the desulfurization reaction, which makes it easier to improve the desulfurization efficiency.

[0004] The desulfurization tower using wet desulfurization usually has a spray structure inside, and the airflow distribution plate is usually set below the spray structure. During the spraying process, the spray will fall on the airflow distribution plate, which requires the airflow distribution plate itself to have a certain strength. The existing airflow distribution plate is usually welded to the base steel plate. However, due to the large inner diameter of the desulfurization tower, it is necessary to first splice the base steel plate inside the desulfurization tower, and then weld the airflow distribution plate inside the desulfurization tower.

[0005] However, smoke and dust usually adhere to the inner wall of the desulfurization tower, and the high-temperature spatters generated during the welding process can easily cause fires. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the tray structure needs to be welded and installed inside the desulfurization tower, which is prone to cause fire, thereby providing a new type of high-strength tray and desulfurization tower.

[0007] A high-strength airflow distribution plate, comprising:

[0008] A substrate, wherein a plurality of air holes are provided on the substrate;

[0009] The reinforcing structure is disposed on the base plate and protrudes outward relative to the base plate.

[0010] The reinforcement structure comprises:

[0011] A first bending portion, connected to the substrate, wherein an angle α between the first bending portion and the substrate is an acute angle;

[0012] The second bending portion is arranged at an end of the first bending portion away from the substrate.

[0013] There are two first bending portions, and the two first bending portions are symmetrically arranged on both sides of the second bending portion.

[0014] The second bending portion is arranged parallel to the substrate.

[0015] The reinforcement structure is integrally formed with the base plate.

[0016] A desulfurization tower, comprising:

[0017] The wet dust removal mechanism is correspondingly arranged in the channel for flue gas flow in the desulfurization tower;

[0018] The high-intensity airflow distribution plate described in any of the above schemes is arranged below the wet dust removal mechanism.

[0019] The desulfurization tower also includes:

[0020] The diameter-changing section is located below the wet dust removal mechanism, and the cross-sectional area of ​​the channel for the flue gas flow gradually increases within the diameter-changing section in a direction approaching the wet dust removal mechanism.

[0021] The size of the air holes gradually increases from the center of the channel where the flue gas flows toward the inner wall of the desulfurization tower.

[0022] There are at least two high-intensity airflow distribution plates, which are distributed in the variable diameter section along the vertical direction.

[0023] Adjacent air flow distribution plates are parallel to each other.

[0024] The technical solution of the present invention has the following advantages:

[0025] 1. The present invention provides a high-strength airflow distribution plate, comprising: a base plate, on which a plurality of air holes are provided; and a reinforcing structure, which is provided on the base plate and protrudes outward relative to the base plate.

[0026] The outwardly protruding reinforcement structure can not only improve the strength of the airflow distribution plate itself, but also increase the surface area of ​​the airflow distribution plate, increase the opening area, and improve the efficiency of smoke passage. The airflow distribution plate is usually located below the wet dust removal mechanism to perform flow equalization on the smoke before the smoke undergoes wet dust removal. The airflow distribution plate with a reinforced structure has a larger area for receiving spraying due to the relatively outward protrusion of the reinforced structure. More spray liquid adheres to the airflow distribution plate, which increases the contact area and contact efficiency between the spray liquid and the smoke, thereby enhancing the effect of wet dust removal.

[0027] 2. The high-strength airflow distribution plate provided by the present invention, the reinforcement structure includes: a first bending portion, connected to the substrate and the angle α between the first bending portion and the substrate is an acute angle; a second bending portion, arranged at an end of the first bending portion away from the substrate.

[0028] The first bending part is arranged at an acute angle with the substrate as a whole, so that the surface of the first bending part is inclined toward the wet dust removal mechanism. The spray liquid falls on the surface of the inclined first bending part, plays a guiding role, and guides the spray liquid to spread evenly on the surface of the air flow distribution plate. During the diffusion process of the spray liquid, it is easier to form a film through the air vents. Since the spray liquid is continuously sprayed, the spray liquid used to form the film flows continuously along the surface of the air flow distribution plate, thereby preventing the air vents from being directly sprayed and damaging the film. When the film is broken, a violent air flow will be formed locally. On the one hand, it can improve the contact and mixing of the flue gas and the spray liquid. On the other hand, the broken film breaks the spray liquid that originally constitutes the film into small droplets, so that it can be fully diffused in the flue gas. On the other hand, since the inclined first bending part continuously introduces the spray liquid into the air vents, the film can further improve the degree of contact between the flue gas and the spray liquid during the continuous formation and breaking of the film.

[0029] 3. The high-strength airflow distribution plate provided by the present invention has two first bending portions, and the two first bending portions are symmetrically arranged on both sides of the second bending portion.

[0030] The inclined first bending portion can not only improve the strength of the airflow distribution plate itself, but also provide guiding power for the spray liquid to flow along the surface of the airflow distribution plate, thereby improving the flow equalization effect of the airflow distribution plate and promoting the mixing of flue gas and spray liquid.

[0031] 4. The present invention also provides a desulfurization tower, comprising: a wet dust removal mechanism, which is correspondingly arranged in the channel for flue gas flow in the desulfurization tower; and the high-intensity airflow distribution plate described in any of the above schemes is arranged below the wet dust removal mechanism.

[0032] The air flow distribution plate with a reinforced structure has a larger area receiving the spray due to the relatively outward protrusion of the reinforced structure. More spray liquid adheres to the air flow distribution plate, which increases the contact area and contact efficiency between the spray liquid and the flue gas, thereby enhancing the effect of wet dust removal.

[0033] 5. The present invention also provides a desulfurization tower, which further includes: a variable diameter section located below the wet dust removal mechanism, and the cross-sectional area of ​​the channel for the flue gas flow gradually increases within the variable diameter section in the direction approaching the wet dust removal mechanism.

[0034] The variable diameter section can gradually increase the cross-sectional area of ​​the flue gas as it flows toward the wet dust removal mechanism, thereby improving the processing efficiency of the wet dust removal mechanism.

[0035] 6. The present invention also provides a desulfurization tower, wherein the size of the air holes gradually increases from the center of the channel close to the flue gas flow toward the inner wall of the desulfurization tower.

[0036] Since the cross-section of the flow channel between the variable diameter sections is relatively small, the degree of diffusion of the smoke to the inner wall of the channel is uneven after entering the variable diameter section. Therefore, the air holes in the middle are smaller, forcing the smoke to diffuse and flow to both sides, thereby helping the smoke to diffuse evenly.

[0037] 7. The present invention also provides a desulfurization tower, wherein there are at least two high-intensity airflow distribution plates, which are distributed in the variable diameter section along the vertical direction.

[0038] Two layers of high-strength airflow distribution plates process the flue gas flow uniformly respectively, thereby improving the processing efficiency of the flue gas flow uniformity. Since the flue gas passes through two airflow distribution plates respectively, the air holes of the two airflow distribution plates can correspond one to one or be staggered. The two airflow distribution plates can also be different in the size of the air holes. Among them, in actual use, multiple airflow distribution plates can be spliced ​​to form a group, thereby forming an interception surface for intercepting the flue gas in the flue gas channel in the desulfurization tower. Adjacent airflow distribution plates can be connected by a fixing part, wherein the fixing part is a bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 It is a schematic diagram of a relatively protruding structure of the reinforcement structure on the airflow distribution plate of the present invention;

[0041] Figure 2 is a top view showing the airflow uniform distribution plate structure;

[0042] Figure 3 is a schematic diagram showing the position of the angle α between the first bending portion and the substrate;

[0043] Figure 4 A schematic diagram showing the installation structure of the air flow distribution plate in the desulfurization tower.

[0044] Description of reference numerals:

[0045] 1. Base plate; 11. Reinforcement structure; 111. First bending portion; 112. Second bending portion; 12. Air vent; 2. Fixing portion; 3. Suspension rod; 4. Variable diameter section; 5. Wet dust removal mechanism. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] Example 1

[0051] The present invention provides a high-strength airflow distribution plate, such as Figure 1 , Figure 2As shown, it includes: a substrate 1, on which a plurality of air holes 12 are provided; and a reinforcing structure 11, which is provided on the substrate 1 and protrudes outward relative to the substrate 1. The outwardly protruding reinforcing structure 11 can, on the one hand, improve the strength of the airflow uniform distribution plate itself, and can also increase the surface area of ​​the airflow uniform distribution plate, increase the opening area, and improve the efficiency of the flue gas passing through. The airflow uniform distribution plate is usually located below the wet dust removal mechanism 5, and the flue gas is subjected to flow equalization treatment before the flue gas is subjected to wet dust removal. The airflow uniform distribution plate with the reinforcing structure 11 has an increased area for receiving spraying due to the relatively outward protrusion of the reinforcing structure 11, and more spray liquid adheres to the airflow uniform distribution plate, which increases the contact area and contact efficiency between the spray liquid and the flue gas, thereby enhancing the effect of wet dust removal.

[0052] On the basis of the above implementation manner, as a further limited implementation manner, Figure 1 As shown, the reinforcing structure 11 includes: a first bending portion 111, which is connected to the substrate 1 and the angle α between the first bending portion 111 and the substrate 1 is an acute angle; a second bending portion 112, which is arranged at one end of the first bending portion 111 away from the substrate 1. The first bending portion 111 is arranged at an acute angle with the substrate 1 as a whole, so that the surface of the first bending portion 111 is inclined toward the wet dust removal mechanism 5. The spray liquid falls on the surface of the inclined first bending portion 111, which plays a guiding role and guides the spray liquid to spread evenly on the surface of the air flow distribution plate. During the diffusion process of the spray liquid, it passes through the air vents 12, which makes it easier to form a thin film. Since the spray liquid is continuously sprayed, the spray liquid used to form the thin film flows continuously along the surface of the air flow distribution plate, thereby preventing the air vents 12 from being directly sprayed and damaging the thin film. When the film is broken, a violent air flow will be formed locally, which can improve the contact and mixing of the smoke and the spray liquid on the one hand, and on the other hand, the broken film breaks the spray liquid that originally constitutes the film into small droplets, so that it can be fully diffused in the smoke. On the other hand, since the inclined first bending portion 111 continuously introduces the spray liquid into the air vent 12, the film can further improve the contact degree between the smoke and the spray liquid during the continuous formation and breaking process. As an alternative embodiment, α can also be a right angle or an obtuse angle.

[0053] On the basis of the above implementation manner, as a further limited implementation manner, Figure 1 , Figure 3As shown, there are two first bends 111, and the two first bends 111 are symmetrically arranged on both sides of the second bend 112. The inclined first bends 111 can improve the strength of the airflow distribution plate itself, and can further provide guiding power for the spray liquid to flow along the surface of the airflow distribution plate, thereby improving the flow equalization effect of the airflow distribution plate and promoting the mixing of smoke and spray liquid. As an alternative embodiment, the inclination angles of the first bends 111 on both sides of the second bend 112 can be different.

[0054] On the basis of the above implementation manner, as a further limited implementation manner, Figure 1 As shown, the second bending portion 112 is arranged parallel to the substrate 1. As an alternative embodiment, the second bending portion 112 can also be composed of a plurality of bending units connected in sequence, the bending units can be inclined or parallel to each other, and the bending units can be either plane or arc surface.

[0055] On the basis of the above implementation manner, as a further limited implementation manner, Figure 1 As shown, the reinforcing structure 11 is integrally formed with the substrate 1. The reinforcing structure 11 can be integrally formed by stamping the substrate 1. As an alternative embodiment, the reinforcing structure 11 can also be formed by bending a whole block of blank multiple times. As another alternative embodiment, the reinforcing structure 11 can also be cast together with the substrate 1. As another alternative embodiment, the reinforcing structure 11 and the substrate 1 can be prefabricated by integral welding in a safe operating environment.

[0056] Embodiment 2:

[0057] The present invention also provides a desulfurization tower, such as Figure 4 As shown, it includes: a wet dust removal mechanism 5, which is correspondingly arranged in the channel for flue gas flow in the desulfurization tower; and a high-strength airflow distribution plate of Example 1, which is arranged below the wet dust removal mechanism 5. The airflow distribution plate with a reinforcement structure 11 has an increased area for receiving spraying because the reinforcement structure 11 is relatively protruding outward, and more spray liquid is attached to the airflow distribution plate, which increases the contact area and contact efficiency between the spray liquid and the flue gas, thereby enhancing the effect of wet dust removal.

[0058] On the basis of the above implementation manner, as a further limited implementation manner, Figure 4 As shown, the desulfurization tower further includes: a diameter-reducing section 4, which is located below the wet dust removal mechanism 5, and the cross-sectional area of ​​the channel through which the flue gas flows gradually increases in the direction close to the wet dust removal mechanism 5 within the diameter-reducing section 4. The diameter-reducing section 4 can gradually increase the cross-sectional area of ​​the flue gas in the process of the flue gas flowing toward the wet dust removal mechanism 5, thereby improving the processing efficiency of the wet dust removal mechanism 5.

[0059] On the basis of the above implementation manner, as a further limited implementation manner, Figure 2 , Figure 4 As shown, the size of the air holes 12 gradually increases from the center of the channel where the flue gas flows to the inner wall of the desulfurization tower. Since the cross-section of the flow channel corresponding to the flue gas before reaching the variable diameter section 4 is relatively small, the degree of diffusion of the flue gas to the inner wall of the channel is not uniform after entering the variable diameter section 4. Therefore, the air holes 12 in the middle are smaller, forcing the flue gas to diffuse and flow to both sides, thereby helping the flue gas to diffuse evenly.

[0060] On the basis of the above implementation manner, as a further limited implementation manner, Figure 4 As shown, there are at least two high-intensity airflow distribution plates, and they are distributed in the variable diameter section 4 along the vertical direction. The two layers of high-intensity airflow distribution plates process the flue gas flow uniformly respectively, thereby improving the processing efficiency of the flue gas flow uniformity. Since the flue gas passes through the two airflow distribution plates respectively, the air holes 12 of the two airflow distribution plates can correspond one to one or be staggered with each other. The two airflow distribution plates can also be different in the size of the air holes 12. As an alternative embodiment, there is one high-intensity airflow distribution plate. Among them, in actual use, multiple airflow distribution plates can be spliced ​​together to form a group, thereby forming an interception surface for intercepting the flue gas in the flue gas channel in the desulfurization tower. As shown in FIG. Figure 3 As shown, adjacent air flow distribution plates can be connected via a fixing portion 2, wherein the fixing portion 2 is made of bolts.

[0061] The airflow distribution plate is suspended below the wet dust removal mechanism 5 through the suspension rod 3. As an alternative embodiment, the airflow distribution plate is fixed on the inner wall of the desulfurization tower. As another alternative embodiment, a truss structure is set in the desulfurization tower, and the airflow distribution plate is connected to the truss.

[0062] On the basis of the above implementation manner, as a further limited implementation manner, Figure 4 As shown, the adjacent airflow distribution plates are parallel to each other. As an alternative embodiment, the adjacent airflow distribution plates are inclined.

[0063] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A desulfurization tower, characterized in that: include: The wet dust removal mechanism (5) is correspondingly arranged in a channel for flue gas flow in the desulfurization tower; A high-strength airflow distribution plate is arranged below the wet dust removal mechanism (5), the high-strength airflow distribution plate comprises a base plate (1) and a reinforcement structure (11), the base plate (1) is provided with a plurality of air holes (12), the reinforcement structure (11) is arranged on the base plate (1) and protrudes outward relative to the base plate (1), a plurality of the high-strength airflow distribution plates are spliced ​​to form a group, and an interception surface for intercepting flue gas is formed in the flue gas channel in the desulfurization tower, and the high-strength airflow distribution plate is suspended below the wet dust removal mechanism (5) through a suspension rod (3); The variable diameter section (4) is located below the wet dust removal mechanism (5), and the cross-sectional area of ​​the flue gas flow channel gradually increases in the direction close to the wet dust removal mechanism (5) within the variable diameter section (4). There are at least two high-intensity airflow distribution plates, which are distributed in the variable diameter section (4) in the vertical direction. The air holes (12) on the two high-intensity airflow distribution plates correspond to each other or are staggered with each other. The size of the air holes (12) gradually increases from the center of the flue gas flow channel to the inner wall of the desulfurization tower.

2. The desulfurization tower according to claim 1, characterized in that: The reinforcement structure (11) comprises: A first bent portion (111) connected to the substrate (1), wherein an angle α between the first bent portion (111) and the substrate (1) is an acute angle; The second bending portion (112) is arranged at an end of the first bending portion (111) away from the substrate (1).

3. The desulfurization tower according to claim 2, characterized in that: There are two first bending portions (111), and the two first bending portions (111) are symmetrically arranged on both sides of the second bending portion (112).

4. The desulfurization tower according to claim 2 or 3, characterized in that: The second bent portion (112) is arranged parallel to the substrate (1).

5. The desulfurization tower according to any one of claims 1 to 3, characterized in that: The reinforcement structure (11) and the base plate (1) are integrally formed.

6. The desulfurization tower according to claim 1, characterized in that: Adjacent air flow distribution plates are parallel to each other.

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