Air lifting disc structure

Abstract

The utility model provides a gas lifting disc structure, which relates to the technical field of gas-liquid separation equipment and comprises a box body, the bottom of the box body is hollowed out, wing plates are upwards arranged on two opposite sides of a top plate, one end of each wing plate is flush with a side plate of the box body, the other end of each wing plate extends out of the other side plate of the box body, and the two wing plates and the top plate form a top collecting tank; one or more layers of side collecting grooves are formed below the two wing plates from top to bottom, and side plates of the box body from the lower edge of each wing plate to the groove bottom line of the lowermost layer of side collecting groove below the wing plate are hollowed out; the groove bottom line and the wing plate above the groove bottom line are located in the same vertical plane, the two ends of the groove bottom line are flush with the two ends of the wing plate above the groove bottom line, one end of the groove bottom line abuts against the side plate of the box body, and the other end of the groove bottom line inclines downwards and extends out of the other side plate of the box body; and the notch is fixedly connected with the side collecting groove. According to the utility model, spraying cooling water is efficiently prevented from entering the desulfurization slurry tank, and purified flue gas smoothly flows out of the absorption tower.

Description

A type of air-lift plate structure Technical Field

[0001] This utility model relates to the field of gas-liquid separation equipment technology, and in particular to a gas lifting plate structure. Background Technology

[0002] Currently, most thermal power plants use limestone-gypsum wet desulfurization systems for flue gas desulfurization. While this technology is mature, it has drawbacks, such as high water consumption. To reduce water consumption, flue gas water recovery technology has emerged. This technology involves spraying process water into the clean flue gas section of the desulfurization tower (the area where the clean flue gas resides after desulfurization and demisting). This process water further cools the clean flue gas, achieving supersaturation. Some water vapor in the clean flue gas is then transferred to the liquid water side for collection. To save construction costs, some projects combine the desulfurization tower and condensation tower into one unit, with desulfurization at the bottom and condensation and water recovery at the top. However, in this tower type, spraying process water above the desulfurization tower directly affects the water balance of the original absorption tower. Therefore, the water sprayed in and recovered for cooling needs to be discharged from the desulfurization tower, which is where the riser plate comes in.

[0003] The riser plate is positioned above the spray layer and demister of the desulfurization tower, below the cooling spray. Flue gas can pass through the riser plate to continue its upward movement, while the spray water is blocked by the riser plate to prevent it from falling into the bottom slurry pool of the desulfurization tower. Currently, riser plates on the market come in various forms, but none can completely prevent the spray cooling water from entering the desulfurization tower slurry pool. Alternatively, after the flue gas exits the riser plate, it can create splashes in the accumulated liquid layer, causing cooling water to enter the desulfurization tower slurry pool, thus disrupting the water balance of the absorption tower. Summary of the Invention

[0004] In view of the technical problems existing in the background art, the present invention provides a rising plate structure, which, through a reasonable gas-liquid separation method, effectively blocks the cooling water sprayed from the top from continuing to enter the desulfurization slurry pool. It also features low operating resistance, a robust and stable structure, simple structure, and excellent gas-liquid separation effect.

[0005] To achieve the above objectives, this utility model provides an air-lift plate structure, comprising: a box body, the bottom of which is hollowed out, and two wing plates on opposite sides of the top plate, each wing plate having one end flush with the side plate of the box body and the other end extending out of the other side plate of the box body, the two wing plates and the top plate of the box body forming a top collection groove;

[0006] One or more side collection grooves are provided below the two wing plates from top to bottom. The side plates of the box are hollowed out from the lower edge of each wing plate to the bottom line of the lowest side collection groove.

[0007] Each side collection trough has an opening facing upwards. The bottom line of the trough and the upper wing plate are located in the same vertical plane. Both ends are flush with the ends of the upper wing plate. One end abuts against the side plate of the box body, and the other end tilts downwards and extends out of the other side plate of the box body. The other side plate is provided with a notch to accommodate the extension end of the side collection trough, and is fixedly connected to the side collection trough at the notch position.

[0008] As a further improvement of this utility model, it also includes a column;

[0009] Each wing plate has a vertically installed column connected to its lower edge. The column passes through the bottom of the side collection grooves of each layer below the wing plate and is fixedly connected to the outer wall of the box side plate.

[0010] The column and the side collection trough are tightly connected at the penetration points.

[0011] As a further improvement of this utility model, multiple columns are connected to the lower edge of each wing plate, and the multiple columns are evenly distributed.

[0012] As a further improvement of this utility model, the upper edge of the side collection groove located inside the box is higher than the upper edge of the side groove located outside the box.

[0013] As a further improvement of this utility model, the upper edge of the side collection groove on the outside of the box body is folded outward.

[0014] As a further improvement of this utility model, the portions of the two wing plates extending beyond the other side plate of the box body are further provided with a first guide plate, and a second guide plate is provided between the lower end of the first guide plate and the uppermost side collection groove located inside the box body.

[0015] As a further improvement of this utility model, the side collection groove has a V-shaped structure, and the included angle between the two side plates of the groove is 50° to 70°.

[0016] As a further improvement of this utility model, the side collection grooves on both sides of the box are inclined in the same or opposite directions.

[0017] As a further improvement of this utility model, the distance between the two wing plates extending out of the other side plate of the box body is 10-15cm.

[0018] As a further improvement of this utility model, the inclination angle of the side collection groove is 20-40°.

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

[0020] The air riser structure of this invention adopts a reasonable top collection trough and side collection trough structure, which is simple in structure and has the characteristics of low operating resistance and robust and stable structure. Compared with the existing technology, which cannot completely prevent the spray cooling water from entering the desulfurization tower slurry pool, and which causes water droplets to be stirred up after the flue gas exits the air riser, resulting in cooling water entering the desulfurization tower slurry pool and disrupting the water balance of the absorption tower, this invention can effectively prevent the cooling water sprayed from the top from continuing to flow downward into the desulfurization slurry pool, protecting the water balance of the absorption tower from being disrupted.

[0021] The side collection trough of this utility model's air riser structure adopts an inclined V-shaped groove, which facilitates liquid collection and drainage. The side plate of the side collection trough located inside the box is higher than the outer side, making it difficult for the slurry in the trough to splash into the inner side of the air riser. When the desulfurized flue gas flows out of the air riser, it will not bend downwards and blow up the liquid holding layer of the collected coolant in the air riser. This avoids the collected cooling water from splashing up again and escaping into the slurry pool below the desulfurization tower through the air flow channel of the air riser. This structure not only reduces the air flow angle and lowers the resistance of the air riser, but also further improves the reliability of gas-liquid separation in the air riser. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the air-lift plate structure disclosed in one embodiment of the present utility model;

[0023] Figure 2 is a schematic diagram showing the position of the air riser plate in the desulfurization tower according to an embodiment of the present invention.

[0024] Figure 3 is a schematic diagram of the layered arrangement of the air lifting plate according to an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of the liquid collection tank at the top of the air riser plate in one embodiment of the present invention.

[0026] Figure 5 is a schematic diagram of the liquid collection tank on the side of the air-lift plate disclosed in an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of the flue gas flow direction disclosed in one embodiment of this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Top collection trough; 2. Side collection trough; 3. Column; 4. Box body. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] 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.

[0032] 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.

[0033] The present invention will now be described in further detail with reference to the accompanying drawings:

[0034] As shown in Figure 1, the present invention provides an air-lifting plate structure, including: a box body 4, the bottom of the box body 4 is hollowed out, and the two sides of the top plate are provided with upward wing plates. One end of each wing plate is flush with the side plate of the box body 4, and the other end extends out of the other side plate of the box body 4. The two wing plates and the top plate of the box body 4 form a top collection groove 1.

[0035] One or more side collection grooves 2 are provided below the two wing plates from top to bottom. The side plates of the box body 4 are hollowed out from the lower edge of each wing plate to the bottom line of the lowest side collection groove 2.

[0036] Each side collection trough 2 has an opening facing upwards. The bottom line of the trough and the upper wing plate are in the same vertical plane. Both ends are flush with the ends of the upper wing plate. One end abuts against the side plate of the box body 4, and the other end is inclined downwards and extends out of the other side plate of the box body 4. The other side plate is provided with a notch to accommodate the extension end of the side collection trough 2, and is fixedly connected to the side collection trough 2 at the notch position.

[0037] The gas lifting plates of this utility model are arranged in layers inside the desulfurization tower, as shown in Figure 3. Multiple gas lifting plates are arranged together on a base plate. Note that the part of the base plate located on the lower side of the box 4 is hollowed out to allow the clean flue gas to rise. Specifically, as shown in Figure 2, the gas lifting plates are arranged above the desulfurization demister and below the cooling water spray equipment.

[0038] As shown in Figure 6, the clean flue gas (containing a large amount of water vapor) in a saturated state after passing through the desulfurization and demister of the desulfurization tower enters the box 4 from the bottom and overflows upwards from the perforated areas on both sides of the box 4. Cooling spray water is sprayed downwards from above the rising plate and comes into contact with the clean flue gas overflowing from the box 4. The low-temperature cooling water directly contacts the clean flue gas, which lowers the temperature of the clean flue gas and turns it into a supersaturated state. As a result, the excess water vapor is precipitated in the form of liquid water and captured by the spray water. It flows downwards to the rising plate, and part of it flows into the top collection tank 1 of the rising plate. It then flows downwards from both sides of the top collection tank 1 to the bottom plate where the rising plate is located (as shown in Figure 4). Part of it flows into the side collection tank 2 and flows downwards along the inclined direction of the side collection tank 2 to the bottom plate where the rising plate is located (as shown in Figure 5). Finally, the water flowing to the bottom plate where the rising plate is located is discharged from the desulfurization tower through the cooling water outlet set at the side wall of the desulfurization tower where the layered rising plates are located (as shown in Figure 3).

[0039] In this invention, two upward-facing wing plates are provided on opposite sides of the top plate of the housing 4, with a height of 15-30cm. The two wing plates extend 10-15cm beyond the other side plate of the housing 4. The two wing plates guide the water entering the top collection tank 1, ensuring a smooth downward flow and preventing it from flowing down the edge where the side collection tank 2 is located. This prevents excessive water overflow from the side collection tank 2 and also prevents large amounts of water from falling into the side collection tank 2 and causing significant splashing, which could disrupt the water balance of the absorption tower. The top collection tank 1 and the side collection tank 2 achieve water separation, making the collection of sprayed water more stable and safe.

[0040] The medium-lift air plate structure of this utility model also includes a column 3:

[0041] Each wing plate has a vertically set column 3 connected to its lower edge. The column 3 passes through the bottom of each layer of side collection groove 2 below the wing plate and is fixedly connected to the outer wall of the side plate of the box body 4, supporting the top collection groove 1 and fixing the side collection groove 2.

[0042] The column 3 and the side collection trough 2 are tightly connected at the penetration points, including by using reliable sealing methods such as welding or bonding to achieve a tight connection.

[0043] Specifically, each wing plate has multiple columns 3 connected to its lower edge, and the columns 3 are evenly distributed. Preferably, the number of columns 3 can be 1 to 4.

[0044] The side collection groove 2 of this utility model:

[0045] The upper edge of the side collection trough 2 located on the inner side of the box 4 is higher than the upper edge of the side collection trough located on the outer side of the box 4. Preferably, the inner side collection trough is 10-15cm higher than the outer side collection trough. When there is too much water in the side collection trough 2, the water will only overflow from the edge of the side collection trough located on the outer side of the box 4 to the bottom surface where the air riser plate is located, thus preventing the water in the side collection trough 2 from overflowing into the box 4 from the inner side collection trough.

[0046] The side collection trough 2 is located on the outside of the tank body 4. The upper edge of the trough side plate is folded outward so that water falling on the edge of the trough side plate can slide into the side collection trough 2 or flow down along the folded edge, avoiding splashing water into the tank body 4.

[0047] Specifically,

[0048] The side collection trough 2 has a V-shaped structure, and the included angle between the two side plates is 50° to 70°.

[0049] The side collection grooves 2 on both sides of the box 4 can be symmetrically arranged with the same tilt direction; or they can be asymmetrically arranged with opposite tilt directions.

[0050] The inclination angle of the side collection tank 2 is 20-40°.

[0051] This utility model also includes two guide vanes:

[0052] As shown in Figure 1, the two wing plates of the top collection trough 1 extend downward from the other side plate of the box body 4 and are provided with a first guide plate. The lower end of the first guide plate and the uppermost side collection trough 2 located inside the box body 4 are provided with a second guide plate.

[0053] Water flowing down from the top collection tank 1 flows straight down along the first guide plate, preventing water from overflowing to the side and flowing onto the guide plate in the side collection tank 2. At the same time, by setting the second guide plate, the water passing through the first guide plate can be redirected, preventing it from falling directly into the side collection tank 2. This avoids splashing water and also prevents excessive water from overflowing from the side collection tank 2.

[0054] Specifically,

[0055] The width of the first and second guide vanes corresponds to the distance between the two wing plates extending out of the other side plate of the box 4, and is also 10-15cm.

[0056] The lowest side collection trough 2 in this utility model has one end that protrudes 50-80cm above the bottom of the box body 4.

[0057] The air lifting plate of this utility model is made of corrosion-resistant materials such as 316L or higher or fiberglass, with a material thickness of 3mm or more.

[0058] Example:

[0059] According to the air-lift plate structure of this utility model, the wing plates on both sides of the top collection trough 1 are 20cm higher than the bottom of the trough. The starting end (i.e., the higher end of the inclined side collection trough 2) is flush with the side of the box body 4, and the ending end of the top collection trough 1 (i.e., the lower end of the inclined side collection trough 2) extends 12cm out of the box body 4. The side collection troughs 2 are arranged symmetrically on both sides of the air-lift plate box body 4. Two layers of side collection troughs 2 are set on each side. The side collection troughs 2 are inclined at an angle of 35°, and the side collection troughs 2 are generally "V" shaped structures with an included angle of 55° between the two wing plates. The half of the wing plate located on the inner side of the box body 4 is 15cm higher than the half of the wing plate located on the outer side of the box body 4. In addition, the top of the wing plate located on the outer side of the box body 4 is folded. Furthermore, the higher end of the side collection trough 2 is flush with the connection point of the box body 4, while the lower end of the side collection trough 2 extends 12cm out of the box body 4. In this embodiment, the column 3 passes through the side collection trough 2, and the passage is sealed by welding. There can be 4 columns 3. The columns 3 serve to support the top collection trough 1 and fix the side collection trough 2. Multiple air lifting plates of the above specifications are arranged in layers above the desulfurization tower desulfurization demister and below the cooling spray. The application process includes the following steps:

[0060] S1. After desulfurization, the clean flue gas passes through the desulfurization demister. The clean flue gas is in a saturated wet flue gas state at about 55°C and contains a large amount of water vapor.

[0061] S2. Clean flue gas enters the rising plate from the bottom of the box 4 and overflows upward from the hollowed-out positions on both sides of the box 4;

[0062] S3. The low-temperature cooling water sprayed from the cooling water spray layer above the gas riser directly contacts the clean flue gas after desulfurization, which reduces the flue gas temperature to 40-50℃ and turns the flue gas into a supersaturated state, so that the excess water vapor is released in the form of liquid water and captured by the spray water.

[0063] S4. The cooling water sprayed and the condensate collected during the cooling process first fall into the top collection tank 1 above the air riser plate, and then flow down the air riser plate from both ends (as shown in Figure 4). The wing plate extends out of one end of the side plate of the box body 4. The condensate is guided by the first guide plate and the second guide plate and flows down the air riser plate.

[0064] S5. The coolant and condensate that fall into the side collection tank 2 flow down the air riser along the inclined collection tank (as shown in Figure 5).

[0065] S6. The water flowing down from the air riser is collected by the bottom plate where the air riser is installed, and discharged from the air riser layer through the cooling water outlet on the side of the desulfurization tower (as shown in Figure 3).

[0066] S7. The clean flue gas, after being treated by cooling water spray, continues to flow upward out of the desulfurization tower (as shown in Figure 2).

[0067] Advantages of this utility model:

[0068] The riser structure of this utility model mainly consists of a top collection trough, side collection troughs, columns, and a housing. During operation, a cooling water spray system is located at the top of the riser. The cooling water directly contacts the desulfurized flue gas, lowering its temperature. In a supersaturated state, water in the flue gas condenses and is directly captured by the sprayed cooling water. The cooling water and the water collected from the flue gas are first received by the top collection trough and flow down the riser to both ends. Additionally, the side collection troughs also receive some of the cooling water sprayed from above and flow down the inclined side collection troughs into the riser housing. Meanwhile, the desulfurized flue gas enters the riser housing from below and then flows out from above the side collection troughs. This riser structure effectively prevents the sprayed cooling water and collected condensate from flowing into the slurry pool of the desulfurization tower, while also allowing the clean flue gas to flow smoothly out of the absorption tower, achieving gas-liquid separation.

[0069] The air riser structure of this invention adopts a reasonable top collection trough and side collection trough structure, which is simple in structure and has the characteristics of low operating resistance and robust and stable structure. Compared with the existing technology, which cannot completely prevent the spray cooling water from entering the desulfurization tower slurry pool, and which causes water droplets to be stirred up after the flue gas exits the air riser, resulting in cooling water entering the desulfurization tower slurry pool and disrupting the water balance of the absorption tower, this invention can effectively prevent the cooling water sprayed from the top from continuing to flow downward into the desulfurization slurry pool, protecting the water balance of the absorption tower from being disrupted.

[0070] The side collection trough of this utility model's air riser structure adopts an inclined V-shaped groove, which facilitates liquid collection and drainage. The side plate of the side collection trough located inside the box is higher than the outer side, making it difficult for the slurry in the trough to splash into the inner side of the air riser. When the desulfurized flue gas flows out of the air riser, it will not bend downwards and blow up the liquid holding layer of the collected coolant in the air riser. This avoids the collected cooling water from splashing up again and escaping into the slurry pool below the desulfurization tower through the air flow channel of the air riser. This structure not only reduces the air flow angle and lowers the resistance of the air riser, but also further improves the reliability of gas-liquid separation in the air riser.

[0071] 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 lifting plate structure, characterized in that, include: The box has a hollow bottom and two upward-facing wing plates on opposite sides of the top plate. One end of each wing plate is flush with the side plate of the box, and the other end extends out of the other side plate of the box. The two wing plates and the top plate of the box form a top collection groove. Below the two wing plates, there is one or more side collection grooves from top to bottom. The side plate of the box is hollowed out from the lower edge of each wing plate to the bottom line of the lowest side collection groove. Each side collection groove opens upward, and the bottom line of the groove is in the same vertical plane as the wing plate above it. Both ends are flush with the ends of the wing plate above it. One end abuts against the side plate of the box, and the other end slopes downward and extends out of the other side plate of the box. The other side plate has a notch to accommodate the extension end of the side collection groove and is fixedly connected to the side collection groove at the notch.

2. The air-lift disc structure according to claim 1, characterized in that: It also includes columns; each wing plate has a vertically installed column connected to its lower edge. The column passes through the bottom of the side collection grooves of each layer below the wing plate and is fixedly connected to the outer wall of the box side plate; the column and the side collection groove are tightly connected at the penetration points.

3. The air-lift disc structure according to claim 2, characterized in that: Each wing plate has multiple columns connected to its lower edge, and these columns are evenly distributed.

4. The air-lift disc structure according to claim 1, characterized in that: The upper edge of the side collection trough located inside the box is higher than the upper edge of the side plate located outside the box.

5. The air-lift disc structure according to claim 1, characterized in that: The side collection trough is located on the outer side of the trough side plate of the box body, with the upper edge folded outward.

6. The air-lift disc structure according to claim 1, characterized in that: The two wing plates extend downward from the other side plate of the box and are provided with a first guide plate. A second guide plate is provided between the lower end of the first guide plate and the uppermost side collection groove located inside the box.

7. The air-lift disc structure according to claim 1, characterized in that: The side collection trough has a V-shaped structure, and the included angle between the two side plates of the trough is 50° to 70°.

8. The air-lift disc structure according to claim 1, characterized in that: The side collection troughs on both sides of the box are inclined in the same or opposite directions.

9. The air-lift disc structure according to claim 1, characterized in that: The distance between the two wing plates extending from the other side plate of the box body is 10-15cm.

10. The air-lift disc structure according to claim 1, characterized in that: The inclination angle of the side collection trough is 20-40°.

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