Efficient demister baffle plate and demister

Abstract

The utility model relates to an efficient demister baffle plate and a demister, the efficient demister baffle plate comprises a plurality of baffle plates arranged at intervals, and a demisting runner is formed between every two adjacent baffle plates; a plurality of convex hulls are arranged on the surface of at least one of the baffle plates on the two sides of the demisting runner, the convex hulls are hemispherical, and the convex hulls are made of hydrophobic materials or are provided with hydrophobic layers on the surfaces. The convex hulls are arranged on the surface of the baffle plate, so that the surface area of the baffle plate is increased, the contact area of the baffle plate and airflow is increased, liquid drops are fully collided, and under the shearing action of the airflow, the liquid drops are difficult to stay on the surface of the convex hulls after colliding with the convex hulls, flow to the surface of the baffle plate towards the roots of the convex hulls and gradually gather on the surface of the baffle plate to form a liquid film; sufficient gathering of liquid drops is realized, and the demisting efficiency and the flushing effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of baffle demisters, in particular to a high-efficiency demister baffle and a demister. Background Art

[0002] Gas-liquid separation is a common process in many fields of physical chemistry. It primarily involves separating gases and dispersed liquid droplets at an interface, with the goal of removing and isolating unwanted substances to purify useful substances. Gas-liquid separators come in various types and forms based on different separation principles, including gravity separators driven by gravity, centrifugal separators driven by centrifugal force, and adsorption separators based on material selectivity. A baffle-type mist eliminator is a gas-liquid separator with a simple structure that is easy to install and disassemble. It features a large processing capacity, low pressure drop, and wide applicability. The curved baffles force the gas entering the flow channel to turn, and the droplets with greater inertia will collide with the windward surface of the baffle and adsorb on the surface of the plate. As the droplets collide and aggregate, a liquid film is formed, which flows out along the wall in the opposite direction of the airflow under the action of gravity. Due to structural limitations, baffle demisters have the following problems: 1. Droplets collide with the windward surface of the baffle and gradually accumulate into a liquid film. However, the discharge direction of the liquid film is opposite to the direction of the airflow, causing the liquid film to further accumulate and thicken, reducing the flow area and affecting subsequent gas flow. The flexible surface of the liquid film is more resistant to droplet collisions than the rigid surface of the flat plate. 2. During the gas-liquid separation process in the chemical process, droplets may be corrosive. Long-term liquid film corrosion on the baffle surface will damage its service life. Some droplets may contain solid particles, and the continuous collision of droplets will also cause gradually accumulated abrasive damage.

[0003] In addition to using plate materials more suitable for chemical processes, improving the existing structure to allow more droplets to collide with the baffle surface, promote the discharge of the liquid film, reduce solid precipitation and adhesion in the liquid film, and minimize investment costs are the key to solving the above problems. While existing improved structures can increase droplet collisions and improve demisting efficiency to a certain extent, due to inherent problems of the improved structures, most of them are prone to scaling and abrasion damage, making it difficult to flush, resulting in degraded demister performance and a shortened service life. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a high-efficiency demister baffle and demister, the purpose of which is to improve the performance degradation of the demister during use, enhance the gas-liquid separation efficiency and flushing effect, and increase the service life.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] The utility model provides a high-efficiency demister baffle, comprising a plurality of spaced baffles, a demister flow channel is formed between two adjacent baffles, the demister flow channel comprises a straight area and an oblique area arranged in sequence from the inlet to the outlet, and one side of the oblique area is the windward side;

[0007] A plurality of convex hulls are provided on the surface of at least one of the baffles on both sides of the demisting flow channel. The convex hulls are hemispherical and made of a hydrophobic material or a hydrophobic layer is provided on the surface of the convex hulls.

[0008] Further technical solutions are:

[0009] The distribution density of the convex hulls on the windward surface of the oblique line area is not less than the distribution density in other areas.

[0010] The plurality of convex hulls are evenly distributed on the surface of the baffle.

[0011] The baffle is made of a hydrophobic material, or a hydrophobic layer is provided on the surface of the area where the convex hull is not provided.

[0012] The height of the hemisphere is 1 / 20 to 1 / 10 of the plate spacing.

[0013] The radius of the hemispherical shape is 1 / 20 to 1 / 10 of the plate spacing.

[0014] The convex hull and the baffle are integrally formed; the convex hull and the baffle are smoothly transitioned through an arc surface at the connecting position.

[0015] The straight line area and the oblique line area are smoothly transitioned through an arc surface at the connecting position.

[0016] The hydrophobic layer is made of super hydrophobic material.

[0017] The utility model also provides a demister, comprising the high-efficiency demister baffle.

[0018] The beneficial effects of the utility model are as follows:

[0019] The convex hull provided on the surface of the baffle of the utility model increases the surface area of ​​the baffle, thereby increasing the contact area with the airflow and achieving full collision of the droplets. Under the shearing action of the airflow, the droplets are difficult to stay on the surface of the convex hull after colliding with the convex hull, but flow to the root of the convex hull to the surface of the baffle, and gradually gather into a liquid film on the surface of the baffle, thereby achieving full aggregation of the droplets. From the perspective of fluid dynamics principles, compared with other shapes, the hemispherical convex hull of the utility model can reduce flow resistance, better promote liquid flow, and greatly improve the demisting efficiency. In addition, when flushing the demister baffle, the hemispherical shape can prevent tiny liquid residues from causing surface scaling and causing performance failure, thereby improving the flushing effect.

[0020] The utility model has a smooth convex surface and a hydrophobic material or a hydrophobic layer on the surface, which further promotes the aggregation of droplets to the baffle surface, inhibits the adhesion of droplets on the convex surface and avoids residue, thereby further preventing scaling.

[0021] The convex hull and the baffle of the utility model transition smoothly at the connecting position, and the transition area forms an arc surface, so that the droplets can move smoothly from the convex hull to the baffle plane, avoiding the existence of a corner at the connecting position that causes solid residue and accumulation.

[0022] The baffle of the utility model is made of hydrophobic material or has a hydrophobic layer on the surface, which is conducive to timely and sufficient discharge of the liquid film.

[0023] The hydrophobic layer of this utility model uses a super-hydrophobic material with excellent hydrophobicity, preventing the liquid film from lingering on the baffle surface for an extended period of time, facilitating its timely discharge and preventing excessive accumulation. The super-hydrophobic material is also wear-resistant and corrosion-resistant, reducing the impact wear and chemical corrosion of droplets on the baffle surface, thereby improving its service life.

[0024] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of the demister baffle according to an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the surface structure of the baffle in an embodiment of the utility model.

[0027] In the figure: 1, inlet; 2, outlet; 3, baffle; 4, convex hull; 5, hydrophobic layer; 61, straight area; 62, oblique area. DETAILED DESCRIPTION

[0028] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0029] like Figure 1 and Figure 2As shown, this embodiment provides a high-efficiency demister baffle, including a plurality of baffles 3 arranged at intervals, a demister flow channel is formed between two adjacent baffles 3, and the demister flow channel includes a straight area 61 and a diagonal area 62 arranged in sequence from the inlet 1 to the outlet 2, and one side of the diagonal area 62 is the windward side; those skilled in the art can understand that when the demister is working, the inlet 1 is at the bottom and the outlet 2 is at the top. When the gas enters the flow channel from the inlet 1, it will initially pass through a straight area 61, so that the droplets mixed in the gas have a state of linear motion. Then the gas and droplets will bend and enter the diagonal area 62. Some droplets collide with the windward side of the baffle due to inertia and adhere to the plate surface. Then they pass through a straight area 61 and reach the second diagonal area 62. Some droplets collide with the windward side of the second diagonal area 62 and are captured. Finally, the gas resumes linear flow in the third straight area 61, reducing vortices and dead zones. The gas flows out from outlet 2, and the droplets captured by the plate surface gather into a liquid film. Under the action of gravity, it flows out from inlet 1 in the opposite direction of the airflow along the wall and is collected.

[0030] In this embodiment, a plurality of convex hulls 4 are provided on the surface of at least one of the baffles 3 on both sides of the demisting flow channel. The convex hulls 4 are hemispherical and made of hydrophobic material with a smooth surface, or a hydrophobic layer 5 is provided on the surface.

[0031] As a preferred embodiment, convex hulls 4 are provided on the surfaces of the baffles 3 on both sides of the demisting flow channel.

[0032] During operation, the demister baffles of this embodiment, under the shearing effect of the airflow, prevent droplets from colliding with the convex hull surface and remaining there. Instead, they flow toward the base of the hull and onto the baffle surface, where they gradually gather into a liquid film. The convex hull increases the baffle's surface area, thereby increasing its contact area with the airflow. This allows more droplets to accumulate on the baffle's flat surface rather than on the curved hull surface, achieving sufficient droplet aggregation.

[0033] The hemispherical convex hull structure helps reduce flow resistance, accelerate droplet flow, and improve demisting efficiency and flushing effects. The convex hull of this embodiment is made of a hydrophobic material or has a hydrophobic layer on its surface, which further promotes the aggregation of droplets on the baffle surface, inhibits the adhesion of droplets on the convex hull surface, and avoids residue, thereby further preventing scaling.

[0034] As a preferred embodiment, the height of the hemispherical shape is 1 / 20 to 1 / 10 of the plate spacing.

[0035] As a preferred embodiment, the radius of the hemispherical shape is 1 / 20 to 1 / 10 of the plate spacing.

[0036] The plate spacing is the spacing between two adjacent baffles.

[0037] As a preferred embodiment, the distribution density of the convex hulls 4 on the windward side of the oblique line area 62 is not less than that of other areas, so that the area of ​​the windward side for its main collection function is expanded to the maximum extent.

[0038] As a preferred embodiment, a plurality of convex hulls 4 are evenly distributed on the surface of the baffle 3 .

[0039] As a preferred embodiment, the baffle 3 is made of a hydrophobic material, or a hydrophobic layer 5 is provided on the surface of the area where the convex hull 4 is not provided. This can prevent the liquid film from staying on the baffle surface for a long time, and help the liquid film to be discharged in time to avoid excessive accumulation.

[0040] Specifically, the convex hull 4 and the baffle 3 can be integrally formed of stainless steel, which has sufficient strength and certain corrosion resistance, and can effectively reduce the collision wear and chemical corrosion of the baffle surface caused by droplets.

[0041] As a preferred embodiment, the hydrophobic layer 5 is made of super-hydrophobic material. Super-hydrophobic material has hydrophobic properties as well as corrosion resistance and wear resistance, which can effectively reduce the collision wear and chemical corrosion of the baffle surface caused by droplets.

[0042] As a preferred embodiment, the convex hull 4 and the baffle 3 are smoothly transitioned through an arc surface at the connection position; the straight area 61 and the oblique area 62 are smoothly transitioned through an arc surface at the connection position, thereby avoiding the presence of corners at the connection position that may cause solid residue and accumulation.

[0043] This embodiment also provides a demister, including the high-efficiency demister baffles. The materials and shape parameters of the baffles are completely consistent, which is convenient for installation and removal.

[0044] Those skilled in the art will understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high-efficiency demister baffle, characterized in that: The demisting flow channel comprises a plurality of deflectors (3) arranged at intervals, wherein a demisting flow channel is formed between two adjacent deflectors (3), and the demisting flow channel comprises a straight area (61) and an oblique area (62) arranged in sequence along the direction from the inlet (1) to the outlet (2), and one side of the oblique area (62) is a windward side; A plurality of convex hulls (4) are provided on the surface of at least one of the baffles (3) on both sides of the demisting flow channel. The convex hulls (4) are hemispherical and are made of a hydrophobic material or have a hydrophobic layer (5) provided on the surface. The distribution density of the convex hulls (4) located on the windward surface of the oblique line area (62) is not less than the distribution density of other areas.

2. The high-efficiency demister baffle according to claim 1, characterized in that: The plurality of convex hulls (4) are evenly distributed on the surface of the baffle (3).

3. The high-efficiency demister baffle according to claim 1, characterized in that: The baffle (3) is made of a hydrophobic material, or a hydrophobic layer (5) is provided on the surface of an area where the convex hull (4) is not provided.

4. The high-efficiency demister baffle according to claim 1, characterized in that: The height H of the hemispherical shape is 1 / 20 to 1 / 10 of the plate spacing.

5. The high-efficiency demister baffle according to claim 1, characterized in that: The radius R of the hemispherical shape is 1 / 20 to 1 / 10 of the plate spacing.

6. The high-efficiency demister baffle according to claim 1, characterized in that: The convex hull (4) and the baffle (3) are integrally formed; the convex hull (4) and the baffle (3) smoothly transition through an arc surface at the connecting position.

7. The high-efficiency demister baffle according to claim 1, characterized in that: The straight line area (61) and the oblique line area (62) smoothly transition through an arc surface at the connecting position.

8. The high-efficiency demister baffle according to claim 1, characterized in that: The hydrophobic layer (5) is made of super-hydrophobic material.

9. A demister, characterized in that: The invention comprises a high-efficiency demister baffle as described in any one of claims 1 to 8.

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