A bubble elimination device for a wet desulphurization slurry delivery slurry system

Abstract

The application provides a bubble eliminating device for a slurry system for wet desulfurization slurry conveying, and relates to the technical field of wet desulfurization. The bubble eliminating device for the slurry system for wet desulfurization slurry conveying comprises a plurality of slats arranged in a conveying pipeline, and the plurality of slats are arranged in a staggered mode along the conveying direction of the slurry. The slats are located on the upstream side of a slurry pump. The bubble eliminating device for the slurry system for wet desulfurization slurry conveying can effectively eliminate the bubbles in the slurry, thereby reducing the occurrence of cavitation and prolonging the service life of the slurry pump.

Description

Technical Field

[0001] This utility model relates to the field of wet desulfurization technology, specifically to a bubble elimination device for a wet desulfurization slurry conveying system. Background Technology

[0002] Wet desulfurization technology is the most widely used and mature sulfur dioxide control technology in the world today, especially in large and medium-sized thermal power plants and industrial boilers. Its core principle is to use an aqueous solution of alkaline absorbent to scrub the flue gas, thereby removing sulfur dioxide from the flue gas.

[0003] During operation, the wet desulfurization system requires an oxidation blower to supply sufficient oxygen to the slurry in the absorption tower, and a side-entry agitator to stir it, thereby forcibly oxidizing the calcium sulfite generated in the desulfurization reaction into calcium sulfate (gypsum), ensuring efficient and stable operation of the desulfurization process, and improving the quality of the by-product gypsum.

[0004] However, due to the action of the oxidation blower and side-entry agitator, some gas cannot escape in time and forms bubbles, which then enter the conveying system with the slurry. Once inside the slurry pump, the bubbles are compressed and burst as the slurry pressure increases. These bursting bubbles generate shock waves and microjets. When the bubbles are near the metal surface, the shock waves and microjets generated during bursting act on the metal surface, causing metal particles to detach and resulting in cavitation in the pump's flow-through components. In practice, the slurry pump typically becomes unusable after about six months, requiring replacement of the cavitation-damaged flow-through components, leading to significant economic losses. Utility Model Content

[0005] To address the aforementioned issues, this application provides a bubble elimination device for a wet desulfurization slurry conveying system, which can effectively eliminate bubbles in the slurry, thereby reducing cavitation and extending the service life of the slurry pump.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A bubble elimination device for a wet desulfurization slurry conveying system includes several slats disposed in a conveying pipeline, wherein the slats are staggered along the conveying direction of the slurry. The slats are located upstream of the slurry pump.

[0007] Furthermore, all the slats pass through the axis of the conveying pipe.

[0008] Furthermore, it also includes a main cylinder coaxially sleeved within the conveying pipe, with the strip located within the main cylinder and both ends of the strip fixedly connected to the main cylinder.

[0009] Furthermore, a flange is provided on the outer wall of the main cylinder, and the flange is clamped between two connecting flanges of the conveying pipeline.

[0010] Furthermore, sealing rings are provided between the two ends of the main cylinder and the side wall of the conveying pipe.

[0011] Furthermore, stiffening plates are respectively provided between the two ends of the strip and the main cylinder.

[0012] Furthermore, several cutting plates are provided on the inner wall of the main cylinder along the circumferential direction.

[0013] Furthermore, the main cylinder is provided with several cutting plate groups, each of which includes several cutting plates arranged along the circumferential direction.

[0014] Furthermore, the inner end of the cutting plate is provided with a flow guiding slope.

[0015] Furthermore, the thickness of the slats gradually increases along the flow direction of the slurry.

[0016] The beneficial effects of this utility model are: 1. The bubble elimination device for a wet desulfurization slurry conveying system provided in this application embodiment includes multiple strips disposed in the conveying pipeline. When the slurry flows through the strips, the bubbles in the slurry are broken by the strips, thereby effectively eliminating the bubbles in the slurry, reducing the occurrence of cavitation at the slurry pump, and extending the service life of the slurry pump.

[0017] 2. In the bubble elimination device for a wet desulfurization slurry conveying system provided in this application embodiment, multiple strips are staggered along the conveying direction of the conveying pipeline, and there is a distance between two adjacent strips. This not only eliminates as many bubbles as possible in the slurry and reduces the occurrence of cavitation at the slurry pump, but also effectively reduces the flow resistance and does not affect the flow of the slurry. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a bubble elimination device for a wet desulfurization slurry conveying system installed inside a conveying pipeline, as provided in an embodiment of this application. Figure 2 for Figure 1 AA section view in the middle; Figure 3 for Figure 2 A magnified structural diagram of part A in the middle; Figure 4 for Figure 2 A magnified structural diagram of part B in the middle section; Figure 5 for Figure 2 A magnified structural diagram of section C; Figure 6 A three-dimensional structural schematic diagram of a bubble elimination device for a wet desulfurization slurry conveying system provided in this application embodiment; Figure 7 This is a front view of a bubble elimination device for a wet desulfurization slurry conveying system provided in an embodiment of this application; Figure 8 for Figure 7 BB section view in the middle; Figure 9 for Figure 7 CC section view in the middle; Figure 10 for Figure 7 The K-direction view in the image.

[0019] In the diagram: 1. Delivery pipeline; 11. Connecting flange; 12. Flow area; 211. First strip; 212. Second strip; 213. Third strip; 214. Fourth strip; 22. Main cylinder; 221. Flange; 23. Sealing ring; 24. Rib; 251. First cutting plate; 252. Second cutting plate; 253. Third cutting plate; 254. Guide slope. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings. The described embodiments are merely a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the protection scope of this application.

[0021] like Figure 1 and Figure 2 As shown, a bubble elimination device for a wet desulfurization slurry conveying system is located upstream of the slurry pump. The bubble elimination device includes several slats disposed within the conveying pipe 1, the slats being staggered along the slurry conveying direction.

[0022] Here, "a number of the aforementioned slats are staggered along the direction of slurry transport" means that there is a distance between two adjacent slats, the projections of the slats in the vertical plane perpendicular to the transport pipe 1 do not coincide, and the projections of the slats in the vertical plane perpendicular to the transport pipe 1 divide the circular projection of the transport pipe 1 in the vertical plane perpendicular to the transport pipe 1 into a number of flow areas 12.

[0023] In one specific implementation, each of the slats in this embodiment passes through the axis of the conveying pipe 1. That is, the projection of the slats in a vertical plane perpendicular to the conveying pipe 1 divides the circular projection of the conveying pipe 1 in a vertical plane perpendicular to the conveying pipe 1 into several fan-shaped flow areas 12.

[0024] As one specific implementation method, such as Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the bubble elimination device for a wet desulfurization slurry conveying system described in this embodiment includes four strips. For ease of understanding of the specific embodiments of this application, the four strips are sequentially named as first strip 211, second strip 212, third strip 213, and fourth strip 214 along the slurry conveying direction. The first strip 211 is arranged vertically, the fourth strip 214 is arranged horizontally, and the second strip 212 and third strip 213 are arranged obliquely. One end of the second strip 212 points at a 315° direction, and the other end points at a 135° direction. One end of the third strip 213 points at a 45° direction, and the other end points at a 225° direction. The projection of the strips onto a vertical plane perpendicular to the conveying pipe 1 divides the circular projection of the conveying pipe 1 into eight fan-shaped flow regions 12, with each flow region 12 having a central angle of 45°.

[0025] Furthermore, such as Figure 1 and Figure 2 As shown, a bubble elimination device for a wet desulfurization slurry conveying system further includes a main cylinder 22, which is coaxially sleeved inside the conveying pipe 1. The strips are located inside the main cylinder 22, and both ends of the strips are fixedly connected to the inner sidewall of the main cylinder 22 by welding.

[0026] Furthermore, such as Figure 2 and Figure 3 and Figure 6 As shown, the outer wall of the main cylinder 22 is provided with a flange 221 in an annular structure. The flange 221 is clamped between two connecting flanges 11 of the conveying pipe 1. Both ends of the main cylinder 22 extend into the conveying pipe 1.

[0027] In one specific embodiment, the flange 221 described in this embodiment is located at the middle position of the main cylinder.

[0028] The reasons for this design are as follows: First, since the flange 221 is located between the two connecting flanges 11 of the conveying pipe 1, the axial movement freedom of the main cylinder 22 relative to the conveying pipe 1 is restricted. Even if the main cylinder 22 and the conveying pipe 1 are fitted with a clearance, the main cylinder 22 can still be fixed relative to the conveying pipe 1, which also greatly facilitates the installation of the bubble elimination device. Second, placing the bubble elimination device at the connection of the conveying pipe 1 makes installation and disassembly convenient, and also facilitates future inspection and maintenance.

[0029] Furthermore, to prevent the slurry from entering the annular gap between the main cylinder 22 and the conveying pipe 1, such as... Figure 6 As shown, sealing rings 23 are provided between the two ends of the main cylinder 22 and the side wall of the conveying pipe 1.

[0030] In one specific embodiment, the sealing ring 23 described in this embodiment is an O-ring, and the inner wall of the conveying pipe 1 and the outer wall of the main cylinder 22 are respectively provided with annular grooves for accommodating the O-ring.

[0031] Furthermore, in order to increase the structural strength of the connection between the slats and the main cylinder 22, such as... Figure 4 and Figure 5 As shown, stiffeners 24 are provided at both ends of the strip. One side of the stiffener 24 is fixedly connected to the side of the strip opposite to the slurry flow by welding. The side of the stiffener 24 facing the side wall of the main cylinder 22 is fixedly connected to the inner side wall of the main cylinder 22 by welding.

[0032] Furthermore, in order to reduce the flow resistance of the slurry, such as Figure 4 As shown, the thickness of the slats gradually increases along the flow direction of the slurry. Preferably, the cross-section of the slats is an isosceles triangle.

[0033] Furthermore, a plurality of cutting plates are evenly distributed along the circumferential direction on the inner sidewall of the main cylinder 22, and the cutting plates extend radially.

[0034] By setting up a cutter plate, the shortcomings of the sparsely spaced slats in the arc-shaped section of the fan-shaped flow area, which easily misses air bubbles, can be compensated for, thereby improving the air bubble elimination rate. Secondly, it can specifically eliminate "high-risk" air bubbles near the pipe sidewall, thereby reducing the occurrence of cavitation.

[0035] Furthermore, such as Figure 2 As shown, the main cylinder 22 is provided with several cutting plate groups, and each cutting plate group includes several cutting plates evenly arranged along the circumferential direction.

[0036] In one specific implementation, a cutting plate group is provided between two adjacent slats in this embodiment. That is, three cutting plate groups are provided inside the main cylinder 22, one cutting plate group is located between the first slat 211 and the second slat 212, one cutting plate group is located between the second slat 212 and the third slat 213, and the last cutting plate group is located between the third slat 213 and the fourth slat 214.

[0037] Furthermore, the number of cutting plates in each cutting plate group is the same, and they correspond one-to-one. The corresponding cutting plates in each cutting plate group are arranged in a staggered manner.

[0038] Furthermore, the number of cutting plates in the cutting plate group is the same as the number of flow areas 12, and they correspond one-to-one. The cutting plates are located within the corresponding flow areas 12, and the corresponding cutting plates in each cutting plate group are evenly arranged on the arc-shaped side of the corresponding flow area 12.

[0039] To facilitate understanding of the specific embodiments of this application, the cutting plate groups are now named, along the slurry conveying direction, the first cutting plate group 251, the second cutting plate group 252, and the third cutting plate group 253, respectively. Correspondingly, the cutting plates in the first cutting plate group 251 are named the first cutting plate 251, the cutting plates in the second cutting plate group 252 are named the second cutting plate 252, and the cutting plates in the third cutting plate group 253 are named the third cutting plate 253. Figure 8 , Figure 9 and Figure 10 As shown, the corresponding first cutting plate 251, second cutting plate 252 and third cutting plate 253 are located in the same flow area 12, and uniformly divide the arc-shaped side of the flow area 12, which has a fan-shaped structure.

[0040] Furthermore, in order to reduce the flow resistance of the slurry, such as Figure 2 and Figure 3 As shown, the inner end of the cutting plate (the end closest to the axis of the main cylinder 22 is the inner end) is provided with a guide slope 254. The distance between the end of the guide slope 254 facing the slurry flow and the side wall of the main cylinder 22 is less than the distance between the end of the guide slope 254 facing the slurry flow and the side wall of the main cylinder 22.

[0041] Other embodiments obtained by those skilled in the art based on the embodiments provided in this application by combining, splitting, or reorganizing the embodiments of this application do not exceed the protection scope of this application.

[0042] The above detailed embodiments have provided a detailed explanation of the purpose, technical solutions, and beneficial effects of the embodiments of this application. The above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. That is, any modifications, equivalent substitutions, improvements, etc., made on the basis of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A bubble elimination device for a wet desulfurization slurry conveying system, characterized in that: It includes several slats installed in the conveying pipe (1), and the several slats are staggered along the conveying direction of the slurry; The slats are located upstream of the slurry pump.

2. The bubble elimination device for a wet desulfurization slurry conveying system according to claim 1, characterized in that: The slats all pass through the axis of the conveying pipe (1).

3. The bubble elimination device for a wet desulfurization slurry conveying system according to claim 1, characterized in that: It also includes a main cylinder (22) coaxially sleeved inside the conveying pipe (1), the strips are located inside the main cylinder (22), and both ends of the strips are fixedly connected to the main cylinder (22).

4. The bubble elimination device for a wet desulfurization slurry conveying system according to claim 3, characterized in that: A flange (221) is provided on the outer wall of the main cylinder (22), and the flange (221) is clamped between the two connecting flanges (11) of the conveying pipe (1).

5. The bubble elimination device for a wet desulfurization slurry conveying system according to claim 4, characterized in that: Sealing rings (23) are provided between the two ends of the main cylinder (22) and the side wall of the conveying pipe (1).

6. The bubble elimination device for a wet desulfurization slurry conveying system according to claim 3, characterized in that: Stiffeners (24) are respectively provided between the two ends of the slat and the main cylinder (22).

7. A bubble elimination device for a wet desulfurization slurry conveying system according to claim 3, characterized in that: The inner wall of the main cylinder (22) is provided with several cutting plates along the circumferential direction.

8. A bubble elimination device for a wet desulfurization slurry conveying system according to claim 7, characterized in that: The main cylinder (22) is provided with several cutting plate groups, each of which includes several cutting plates arranged along the circumferential direction.

9. A bubble elimination device for a wet desulfurization slurry conveying system according to claim 7, characterized in that: The inner end of the cutting plate is provided with a guide slope (254).

10. A bubble elimination device for a wet desulfurization slurry conveying system according to claim 1, characterized in that: The thickness of the slats gradually increases along the flow direction of the slurry.

Images