A pneumatic emulsion generator for a desulfurization tower

Abstract

The utility model discloses a pneumatic emulsion generator for desulfurization tower, including generator main part, and the generator main part is coaxially fixedly connected with flue gas lead -in section, gas -liquid emulsion section and discharge section from top to bottom, be equipped with a tangential flue gas inlet pipe on the lateral wall of flue gas lead -in section, and the top center of flue gas lead -in section is equipped with clean flue gas outlet pipe, the inside of flue gas lead -in section is equipped with a center collecting pipe, and the upper end of center collecting pipe is closed and is fixedly connected with the inner wall of flue gas lead -in section through a plurality of spokes, and the lower end is open, and a plurality of collecting holes are seted up on the pipe wall of center collecting pipe.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas purification technology, and more specifically, it relates to a pneumatic emulsifier for desulfurization towers. Background Technology

[0002] In wet flue gas desulfurization (FGD) processes, efficiently contacting the absorbent slurry (such as limestone slurry) with the flue gas is crucial to determining desulfurization efficiency and energy consumption. Traditional spray towers use nozzles to atomize the slurry, but this suffers from problems such as large droplet size, uneven distribution, easy nozzle clogging, and limited mass transfer efficiency. Pneumatic emulsification technology utilizes high-speed airflow to break up liquids, producing micron-sized droplets and significantly increasing the gas-liquid contact area. However, existing pneumatic emulsification devices often suffer from complex structures, high energy consumption, easy leakage at component connections, and clogging, especially with high-solids-content slurries. Therefore, there is an urgent need for a compact, reliable, easy-to-maintain, and clogging-resistant pneumatic emulsification generator. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a pneumatic emulsifier for desulfurization towers, thereby solving the problems mentioned in the background section.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic emulsifier for a desulfurization tower, comprising a generator body, wherein a flue gas inlet section, a gas-liquid emulsification section, and a discharge section are coaxially and fixedly connected from top to bottom; a tangential flue gas inlet pipe is provided on the side wall of the flue gas inlet section, and a clean flue gas outlet pipe is provided at the center of the top of the flue gas inlet section; a central manifold is provided inside the flue gas inlet section, the upper end of the central manifold is closed and fixedly connected to the inner wall of the flue gas inlet section through multiple spokes, and the lower end is open; multiple manifold holes are provided on the wall of the central manifold.

[0005] The gas-liquid emulsification section consists of a Venturi tube, and multiple slurry suction holes are evenly distributed on the throat wall of the Venturi tube. An umbrella-shaped diffuser is provided below the throat of the Venturi tube, and the umbrella-shaped diffuser is fixed to the inner wall of the Venturi tube by multiple support rods.

[0006] Preferably, the generator body is made of stainless steel.

[0007] Preferably, a guide cone is provided at the lower opening of the central manifold.

[0008] Preferably, the inner wall of the constricted section of the venturi tube is lined with a wear-resistant ceramic lining.

[0009] Preferably, the end of the clean flue gas outlet pipe is provided with a top flange for suspending and fixing the entire generator to the top plate of the desulfurization tower.

[0010] Preferably, the discharge section is a gradually expanding pipe with a bottom flange at its outlet end for connection to the desulfurization tower body.

[0011] This invention provides a pneumatic emulsifier for desulfurization towers, which has the following advantages:

[0012] 1. High-efficiency mixing and energy saving: Through a two-stage mixing mechanism combining "tangential swirl premixing" and "Venturi effect deep emulsification", the mass transfer efficiency is greatly improved, and the slurry intake does not require additional power, resulting in low operating energy consumption.

[0013] 2. Anti-clogging and high reliability: The synergistic effect of the central manifold, guide cone and umbrella diffuser optimizes the internal flow field, avoids low-speed dead zones and eddies, and fundamentally prevents scaling and clogging.

[0014] 3. Wear resistance and long service life: Key wear parts are lined with wear-resistant ceramics, and the whole is made of stainless steel, which significantly improves the durability of the equipment under harsh working conditions;

[0015] 4. Modular and easy to maintain: The top and bottom flange design makes the generator a standalone standardized module, making installation, maintenance and replacement extremely convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the flue gas inlet section of this utility model.

[0019] Figure 4 This is a schematic diagram of the gas-liquid emulsification section of this utility model.

[0020] In the diagram, 1. Generator body; 2. Flue gas inlet section; 3. Gas-liquid emulsification section; 4. Discharge section; 5. Flue gas inlet pipe; 6. Clean flue gas outlet pipe; 7. Top flange; 8. Central manifold; 9. Spokes; 10. Manifold hole; 11. Guide cone; 12. Venturi tube; 13. Contraction section; 14. Throat; 15. Diffusion section; 16. Slurry suction hole; 17. Support rod; 18. Umbrella-shaped diffuser; 19. Bottom flange. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0022] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: a pneumatic emulsifier generator for a desulfurization tower, comprising a generator body 1, which is a vertical cylindrical structure. The generator body 1 is coaxially fixedly connected from top to bottom to a flue gas inlet section 2, a gas-liquid emulsification section 3, and an outlet section 4. A tangential flue gas inlet pipe 5 is welded to one side of the cylindrical body of the flue gas inlet section 2, and a clean flue gas outlet pipe 6 is welded to the top. A top flange 7 is machined at the end of the pipe for suspension installation. The core internal component is a central manifold 8, which is cantilevered to the center of the cylinder by three or more spokes 9. Several manifold holes 10 are drilled in the upper wall of the central manifold 8, and a guide cone 11 is welded to its lower opening.

[0025] The gas-liquid emulsification section 3 is welded to the flue gas inlet section 2. Its main body is a standard Venturi tube 12, including a contraction section 13, a throat 14, and a diffuser section 15. Multiple slurry suction holes 16 are uniformly drilled on the circumferential wall of the throat 14. Below the throat 14 and inside the diffuser section 15, an umbrella-shaped diffuser hood 18 is fixedly installed by three support rods 17.

[0026] The discharge section 4 is a tapered, expanding pipe with a bottom flange 19 machined at its outlet end for connection to a corresponding flange on the desulfurization tower body. To enhance wear resistance, a wear-resistant ceramic lining is applied to the inner wall of the contraction section 13 of the venturi tube 12. The entire generator body 1 is preferably made of 316L stainless steel by integral welding.

[0027] The specific usage and function of this embodiment are as follows:

[0028] Tangential swirling and preliminary mixing: First, the raw flue gas carrying pollutants enters the flue gas inlet section 2 at high speed through the tangential flue gas inlet pipe 5, forming a cyclone through intense rotation within the cylinder. The high-speed rotating flue gas creates a negative pressure zone outside the central manifold 8. At this time, the slurry that has completed partial reaction inside the desulfurization tower enters through the clean flue gas outlet pipe 6 under static pressure and flows downward along the central manifold 8. Part of it is thrown out through the manifold 10, and the other part is discharged from around the bottom guide cone 11. The thrown-out slurry immediately undergoes its first intense mixing with the high-speed rotating flue gas and is initially atomized.

[0029] Venturi effect and deep emulsification: After initial mixing, the gas-liquid two-phase flow accelerates into the contraction section 13 of the Venturi tube 12 under negative pressure suction and gravity, resulting in a sharp increase in velocity. The velocity reaches its peak at the throat 14, where the cross-section is smallest, and the static pressure drops to its lowest point, generating a strong Venturi effect negative pressure. Under this negative pressure suction, the slurry inside the tower is actively and massively drawn into the center of the throat 14 through the slurry suction port 16. The newly drawn slurry instantly mixes with the supersonic gas-liquid flow from upstream, and is pulverized into micron-sized droplets by its enormous shear force, forming a dense, constantly renewing "pneumatic emulsion," achieving a second deep mixing and emulsification. This is the region where the desulfurization reaction (SO2 absorption) occurs most intensely, with extremely high efficiency.

[0030] Flow field stabilization and smooth discharge: After deep emulsification at the throat 14, the fluid enters the diffuser section 15, where the velocity decreases and the pressure recovers somewhat. The umbrella-shaped diffuser 18 constrains and guides the high-speed jet, ensuring its uniform and smooth diffusion in all directions. This avoids direct impact on the downstream tower wall and turbulent backflow, ensuring a stable flow field and facilitating the smooth flow of the reacted slurry to the bottom of the tower. The treated clean flue gas continues to rise and eventually leaves the generator through the clean flue gas outlet pipe 6, entering the next stage demister.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pneumatic emulsifier for a desulfurization tower, comprising a generator body (1), characterized in that: The generator body (1) is coaxially fixedly connected from top to bottom to a flue gas inlet section (2), a gas-liquid emulsification section (3), and an exhaust section (4); a tangential flue gas inlet pipe (5) is provided on the side wall of the flue gas inlet section (2), and a clean flue gas outlet pipe (6) is provided at the top center of the flue gas inlet section (2); a central manifold (8) is provided inside the flue gas inlet section (2), the upper end of the central manifold (8) is closed and fixedly connected to the inner wall of the flue gas inlet section (2) through multiple spokes (9), and the lower end is open; multiple manifold holes (10) are opened on the pipe wall of the central manifold (8); The gas-liquid emulsification section (3) is composed of a Venturi tube (12), and a plurality of slurry suction holes (16) are evenly opened on the wall of the throat (14) of the Venturi tube (12); an umbrella-shaped diffuser (18) is provided below the throat (14) of the Venturi tube (12), and the umbrella-shaped diffuser (18) is fixed to the inner wall of the Venturi tube (12) by a plurality of support rods (17).

2. The pneumatic emulsifier for a desulfurization tower according to claim 1, characterized in that: The generator body (1) is made of stainless steel.

3. The pneumatic emulsifier for a desulfurization tower according to claim 1, characterized in that: A guide cone (11) is provided at the lower opening of the central manifold (8).

4. A pneumatic emulsifier for a desulfurization tower according to claim 1, characterized in that: The inner wall of the constricted section (13) of the Venturi tube (12) is lined with a wear-resistant ceramic lining.

5. A pneumatic emulsifier for a desulfurization tower according to claim 1, characterized in that: The end of the clean flue gas outlet pipe (6) is provided with a top flange (7) for suspending and fixing the entire generator body (1) to the top plate of the external desulfurization tower.

6. A pneumatic emulsifier for a desulfurization tower according to claim 1, characterized in that: The discharge section (4) is a gradually expanding pipe with a bottom flange (19) at its outlet end for connection with the external desulfurization tower body.

Images