Combined mist eliminator applied to wet desulfurization process
By using a combined demister design, which combines ridge blades and porous wire mesh, the problem of poor demister separation in wet desulfurization processes is solved, achieving efficient droplet separation and improved adaptability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI CHERO AIR TREATMENT EQUIPMENT CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-08-04
AI Technical Summary
In existing wet desulfurization processes, when the demister's droplet adsorption effect is poor, the entire screen needs to be replaced, which leads to a decrease in the net surface velocity, an increase in the maximum droplet size, a weakening of the demister's separation effect, and unsatisfactory removal of small-diameter droplets, resulting in rain drift outside the absorption tower.
The demister adopts a combined design, including a mounting base, a filtration mechanism, and a spraying mechanism. It utilizes a combination of ridge blades and porous wire mesh to improve separation efficiency, and uses atomizing nozzles to prevent dirt condensation, thus enhancing the adaptability of the demister.
It achieves a minimum limiting droplet size of six micrometers and a droplet separation efficiency of 99% in flue gas, significantly improving the droplet collection capacity and adaptability of the demister and preventing problems such as reduced surface flow velocity and increased limiting droplet size.
Smart Images
Figure CN224585599U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of desulfurization absorption tower demisters, specifically to a combined demister applied to wet desulfurization processes. Background Technology
[0002] Demisters are mainly composed of corrugated blades, plates, clamps, and other fixing devices. In wet desulfurization, the absorption tower is prone to generating "mist" with a particle size of 10-60 micrometers during operation. The "mist" not only contains moisture, but also dissolved sulfuric acid, sulfates, sulfur dioxide, etc., which also causes fouling and severe corrosion of fans, heat exchangers, and flues. Therefore, wet desulfurization processes require demisting of the absorption equipment, and the purified gas must be demisted before leaving the absorption tower.
[0003] Patent publication number CN213994862U discloses a demister, including mesh panels, support members, isolation members, and locking members. There are multiple mesh panels, each with several holes. The support members are rod-shaped and at least two in number, and are detachably inserted through the multiple mesh panels.
[0004] To address the issue of needing to completely replace the demister when droplet adsorption is ineffective, existing technology involves detaching individual mesh panels from the support structure. This allows for the replacement of severely corroded or fouled mesh panels, while less affected panels can be retained and reassembled to create a demister that meets usage requirements. However, this approach suffers from several drawbacks. As the flue gas load decreases, the net flow velocity entering the demister gradually decreases, the limiting droplet size increases, and the demister's separation effect weakens. Consequently, the demister becomes less effective at removing small-diameter droplets, leading to the problem of "dripping rain" outside the absorption tower. Utility Model Content
[0005] The purpose of this invention is to provide a combined demister for use in wet desulfurization processes, in order to solve the problems mentioned in the background art.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A combined demister for use in wet desulfurization processes includes a fixed base, a filtration mechanism on the surface of the fixed base, and a spraying mechanism on the surface of the fixed base.
[0007] The filtration mechanism includes a fixed bracket, which is fixedly connected to the surface of a fixed base. An upper fixed frame is fixedly connected to the surface of the fixed bracket. A porous wire mesh is fixedly installed on the surface of the upper fixed frame. A connecting plate is fixedly connected to the surface of the upper fixed frame. Multiple sets of connecting plates are provided, and the connecting plates are evenly distributed at both ends of the upper fixed frame.
[0008] A further improvement of this utility model is that: a fixed top plate is fixedly installed on the surface of the upper fixed frame, a lower fixed frame is fixedly installed on the surface of the fixed top plate, and the lower fixed frame is fixedly installed on the surface of the connecting plate.
[0009] A further improvement of this utility model is that: ridge blades are fixedly installed on the surface of the lower fixed frame, and multiple sets of ridge blades are provided, with the ridge blades evenly distributed on the surface of the lower fixed frame.
[0010] A further improvement of the present invention is that the spraying mechanism includes a support frame, the support frame is fixedly installed on the surface of the fixed seat, an upper horizontal plate is fixedly installed on the top of the support frame, and a first connecting seat is fixedly installed on the surface of the upper horizontal plate.
[0011] A further improvement of the present invention is that: a first water pipe is fixedly installed on the surface of the first connecting seat, a first atomizing nozzle is fixedly installed at the bottom end of the first water pipe, and multiple sets of the first atomizing nozzle are provided, with the first atomizing nozzles evenly distributed at the bottom end of the first water pipe.
[0012] A further improvement of the present invention is that the spraying mechanism further includes a lower horizontal plate, the lower horizontal plate is fixedly installed on the surface of the fixed base, a second connecting base is fixedly installed on the surface of the lower horizontal plate, a second water pipe is fixedly installed on the surface of the second connecting base, a second atomizing nozzle is provided on the surface of the second water pipe, and multiple sets of the second atomizing nozzle are provided, and the second atomizing nozzles are evenly distributed on the surface of the second water pipe.
[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows: 1. This utility model provides a combined demister for wet desulfurization processes. It employs a lower fixed frame, ridge blades, porous wire mesh, connecting plates, a fixed top plate, a fixed bracket, and an upper fixed frame. Multiple sets of connecting plates bolt the lower and upper fixed frames together, forming two groups. The upper frame rests against the surface of the fixed top plate and is secured with bolts. The lower fixed bracket, in conjunction with the spraying mechanism, is fixed to the surface of the fixed base, creating a ridge-like shape. The porous wire mesh is integrated with the ridge blades, saving space and reducing resistance. When flue gas carries tiny droplets, they first adhere and condense through the ridge blades. When the droplets condense... When the volume is large, the droplets fall downwards for collection. At the same time, to prevent the net flow velocity entering the demister from gradually decreasing due to the reduction in flue gas load, the limiting droplet size will increase, and the separation effect of the demister will weaken. By setting an angled porous wire mesh at the top of the lower fixed frame, the separation effect of the demister is improved, so that the minimum limiting droplet size can reach six micrometers. The droplets entrained in the flue gas can collide with the device multiple times at the design velocity, be captured and converged, and then fall down the inclined plane. The separation effect of capturing fine droplets larger than six micrometers reaches 99%, which greatly improves the droplet collection capacity of the demister, meets higher separation requirements, and improves the adaptability of the device.
[0014] 2. This utility model provides a combined demister for wet desulfurization processes. It employs a support frame, upper horizontal plate, first connecting seat, first water pipe, first atomizing nozzle, second connecting seat, second water pipe, second atomizing nozzle, and lower horizontal plate. The support frame and fixed brackets secure the structure. Two rows of first connecting seats on the upper horizontal plate fix the first water pipe, allowing the first atomizing nozzle at the bottom to spray the filter mechanism, causing droplets condensed on the filter mechanism's surface to drip downwards. Simultaneously, the lower horizontal plate supports the second connecting seat, which fixes the second water pipe, allowing multiple sets of second atomizing nozzles to spray the bottom of the filter mechanism. This prevents dirt from condensing on the filter mechanism, affecting adhesion and condensation effects, and improves the adaptability of the device. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the filter mechanism of this utility model; Figure 3 This is a schematic diagram of the porous wire mesh of this utility model; Figure 4 This is a schematic diagram of the spraying mechanism of this utility model.
[0016] In the diagram: 1. Fixed base; 2. Filtering mechanism; 201. Lower fixed frame; 202. Ridge blade; 203. Porous wire mesh; 204. Connecting plate; 205. Fixed top plate; 206. Fixed bracket; 207. Upper fixed frame; 3. Spraying mechanism; 301. Support frame; 302. Upper horizontal plate; 303. First connecting base; 304. First water pipe; 305. First atomizing nozzle; 306. Second connecting base; 307. Second water pipe; 308. Second atomizing nozzle; 309. Lower horizontal plate. Detailed Implementation
[0017] The present invention will be further described in detail below with reference to embodiments: Example 1 like Figure 1-4 As shown, this utility model provides a combined demister for wet desulfurization processes, including a fixed base 1, a filter mechanism 2 and a spraying mechanism 3 on the surface of the fixed base 1, the filter mechanism 2 including a fixed bracket 206 fixedly connected to the surface of the fixed base 1, an upper fixed frame 207 fixedly connected to the surface of the fixed bracket 206, a porous wire mesh 203 fixedly installed on the surface of the upper fixed frame 207, a connecting plate 204 fixedly connected to the surface of the upper fixed frame 207, multiple sets of connecting plates 204 evenly distributed at both ends of the upper fixed frame 207, a fixed top plate 205 fixedly installed on the surface of the upper fixed frame 207, a lower fixed frame 201 fixedly installed on the surface of the fixed top plate 205, the lower fixed frame 201 fixedly installed on the surface of the connecting plate 204, and ridge blades 202 fixedly installed on the surface of the lower fixed frame 201, multiple sets of ridge blades 202 evenly distributed on the surface of the lower fixed frame 201.
[0018] In this embodiment, the lower fixing frame 201 and the upper fixing frame 207 are fixed with bolts using multiple sets of connecting plates 204, and are divided into two groups. The upper end rests against the surface of the fixed top plate 205 and is fixed with bolts. The lower fixing bracket 206 cooperates with the spraying mechanism 3 and is fixed to the surface of the fixing seat 1, so that it forms a ridge shape. At the same time, the porous wire mesh 203 and the ridge blades 202 are integrated together, saving space and having relatively low resistance. When the flue gas carries tiny droplets, they first adhere and condense through the ridge blades 202. When the droplets condense to a larger volume, they drip downwards for collection. Meanwhile, to prevent smoke from rising, the lower fixing bracket 206 is fixed to the surface of the fixing seat 1. When the gas load decreases, the net flow velocity entering the demister gradually decreases, the limiting droplet size increases, and the separation effect of the demister weakens. By setting an angled porous wire mesh 203 at the top of the lower fixed frame 201, the separation effect of the demister is improved, so that the minimum limiting droplet size can reach six micrometers. The liquid droplets entrained in the flue gas can collide with the device multiple times at the design velocity, be captured and converged, and fall down along the inclined plane, achieving a separation effect of 99% for capturing fine liquid droplets larger than six micrometers. This greatly improves the droplet collection capacity of the demister, meets higher separation requirements, and improves the adaptability of the device.
[0019] Example 2 like Figure 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the spraying mechanism 3 includes a support frame 301, which is fixedly installed on the surface of the fixed base 1. An upper horizontal plate 302 is fixedly installed at the top of the support frame 301. A first connecting seat 303 is fixedly installed on the surface of the upper horizontal plate 302. A first water pipe 304 is fixedly installed on the surface of the first connecting seat 303. A first atomizing nozzle 305 is fixedly installed at the bottom end of the first water pipe 304. The first atomizing nozzle 305 is provided with multiple... The spraying mechanism 3 also includes a lower horizontal plate 309, which is fixedly installed on the surface of the fixed base 1. A second connecting base 306 is fixedly installed on the surface of the lower horizontal plate 309. A second water pipe 307 is fixedly installed on the surface of the second connecting base 306. A second atomizing nozzle 308 is provided on the surface of the second water pipe 307. Multiple sets of second atomizing nozzles 308 are provided, and the second atomizing nozzles 308 are evenly distributed on the surface of the second water pipe 307.
[0020] In this embodiment, the support frame 301 and the fixed bracket 206 are used to fix the structure. Two rows of first connecting seats 303 are provided on the surface of the upper horizontal plate 302 to fix the first water pipe 304, so that the first atomizing nozzle 305 at the bottom sprays the filter mechanism 2, causing the droplets condensed on the surface of the filter mechanism 2 to drip downwards. At the same time, the lower horizontal plate 309 at the bottom supports the second connecting seat 306, and the second connecting seat 306 fixes the second water pipe 307, so that multiple sets of second atomizing nozzles 308 spray the bottom of the filter mechanism 2, preventing dirt from condensing on the filter mechanism 2, affecting the adhesion and condensation effect, and improving the adaptability of the device.
[0021] The working principle of this combined demister applied to the wet desulfurization process will be explained in detail below.
[0022] like Figure 1-4 As shown, the lower fixing frame 201 and the upper fixing frame 207 are fixed with bolts by multiple sets of connecting plates 204, and are divided into two groups. The upper end rests against the surface of the fixed top plate 205 and is fixed with bolts. The lower fixing bracket 206 cooperates with the spraying mechanism 3 and is fixed on the surface of the fixing seat 1, so that it forms a ridge shape. At the same time, the porous wire mesh 203 and the ridge blades 202 are integrated together, saving space and having relatively low resistance. When the flue gas carries tiny droplets, they first adhere and condense through the ridge blades 202. When the droplets condense to a larger volume, they drip downwards for collection. Meanwhile, to prevent the flue gas load from decreasing and the net surface velocity entering the demister from gradually decreasing, the limiting droplet size from increasing, and the demister's separation effect from weakening, the demister's separation effect is improved by setting an angled porous wire mesh 203 at the top of the lower fixing frame 201, so that the minimum limiting droplet size is reduced. The device can capture droplets larger than six micrometers. At the designed velocity, droplets entrained in the flue gas collide with the device multiple times, are captured and aggregated, and then fall down the inclined plane, achieving a 99% separation effect for droplets larger than six micrometers. This significantly improves the droplet collection capacity of the demister and meets higher separation requirements. Simultaneously, the support frame 301 and the fixed bracket 206 work together to fix the structure. Two rows of first connecting seats 303 are set on the surface of the upper horizontal plate 302 to fix the first water pipe 304, allowing the first atomizing nozzle 305 at the bottom to spray the filter mechanism 2, causing the droplets condensed on the surface of the filter mechanism 2 to drip downwards. At the same time, the lower horizontal plate 309 at the bottom supports the second connecting seat 306, which fixes the second water pipe 307, allowing multiple sets of second atomizing nozzles 308 to spray the bottom of the filter mechanism 2, preventing dirt from condensing on the filter mechanism 2 and affecting the adhesion and aggregation effect, thus improving the adaptability of the device.
[0023] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.
Claims
1. A combined demister for use in wet desulfurization processes, comprising a fixed base (1), characterized in that: The surface of the fixed base (1) is provided with a filter mechanism (2) and a spraying mechanism (3). The filtration mechanism (2) includes a fixed bracket (206), which is fixedly connected to the surface of the fixed base (1). An upper fixed frame (207) is fixedly connected to the surface of the fixed bracket (206). A porous wire mesh (203) is fixedly installed on the surface of the upper fixed frame (207). A connecting plate (204) is fixedly connected to the surface of the upper fixed frame (207). Multiple sets of connecting plates (204) are provided, and the connecting plates (204) are evenly distributed at both ends of the upper fixed frame (207).
2. The combined demister for wet desulfurization process according to claim 1, characterized in that: A fixed top plate (205) is fixedly installed on the surface of the upper fixed frame (207), and a lower fixed frame (201) is fixedly installed on the surface of the fixed top plate (205). The lower fixed frame (201) is fixedly installed on the surface of the connecting plate (204).
3. A combined demister for wet desulfurization process according to claim 2, characterized in that: The ridge blades (202) are fixedly installed on the surface of the lower fixed frame (201). There are multiple sets of ridge blades (202), and the ridge blades (202) are evenly distributed on the surface of the lower fixed frame (201).
4. A combined demister for wet desulfurization process according to claim 1, characterized in that: The spraying mechanism (3) includes a support frame (301), which is fixedly installed on the surface of the fixed seat (1). An upper horizontal plate (302) is fixedly installed on the top of the support frame (301), and a first connecting seat (303) is fixedly installed on the surface of the upper horizontal plate (302).
5. A combined demister for wet desulfurization process according to claim 4, characterized in that: A first water pipe (304) is fixedly installed on the surface of the first connector (303), and a first atomizing nozzle (305) is fixedly installed at the bottom end of the first water pipe (304). Multiple sets of the first atomizing nozzle (305) are provided, and the first atomizing nozzle (305) are evenly distributed at the bottom end of the first water pipe (304).
6. A combined demister for wet desulfurization process according to claim 1, characterized in that: The spraying mechanism (3) also includes a lower horizontal plate (309), which is fixedly installed on the surface of the fixed base (1). A second connecting seat (306) is fixedly installed on the surface of the lower horizontal plate (309). A second water pipe (307) is fixedly installed on the surface of the second connecting seat (306). A second atomizing nozzle (308) is provided on the surface of the second water pipe (307). Multiple sets of the second atomizing nozzle (308) are provided. The second atomizing nozzles (308) are evenly distributed on the surface of the second water pipe (307).