Anti-blocking separation assembly and demister

Abstract

The invention provides an anti-blocking separation assembly and a demister, and relates to the technical field of flue gas purification equipment, the anti-blocking separation assembly comprises a plurality of baffle plate bodies which are arranged at equal intervals, and the distance between every two adjacent baffle plate bodies is 45-120 mm; an isolating element is arranged between every two adjacent baffle plate bodies; each baffle plate body comprises an inlet section, a first curvature arc section and an outlet section which are arranged in the flowing direction of a vapor-liquid mixture; the first curvature arc line section is a sine wave curve, and the wave crest of the first curvature arc line section is smoothly connected with a second curvature arc line section; an included angle between the first curvature arc section and the second curvature arc section is 30-60 degrees; the radius of the arc-shaped curved surface of the outlet section is the same as that of the arc-shaped curved surface of the isolation element, so that the problems that the resistance is increased by increasing the number of layers and the capturing capacity for small-particle-size fog drops is insufficient in the prior art are solved, and the technical effects of reducing the vortex effect through flow channel optimization, reducing the airflow resistance and improving the overall demisting performance through triple interception are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas purification equipment, and in particular to an anti-clogging separation component and a demister. Background Art

[0002] In coal-fired power plant desulfurization systems, demisters control the emission of mist droplets from flue gas. Their performance impacts both pollutant emission standards and the safe operation of the equipment. Baffle demisters, a common type, primarily force the flue gas to undergo multiple directional changes between baffles. This utilizes inertial forces to cause mist droplets to collide with the baffles and be captured, ultimately achieving gas-liquid separation.

[0003] Among existing demisters, traditional baffle demisters typically use straight plates or simple zigzag lines, with support plates at fixed intervals to form an airflow channel. Ridge-type demisters, on the other hand, utilize a ridge-like structure formed by stitching together multiple triangular units to increase the contact area. These structures are generally suitable for medium to low flow rates and primarily target large droplets (≥20μm).

[0004] However, under high flow rate conditions, when traditional baffle demisters or ridge-type demisters exceed the design flow rate, droplets are prone to secondary carryover due to insufficient inertia, resulting in low demisting efficiency. At this time, when existing technologies reduce the plate spacing or increase the number of layers to improve efficiency, the system resistance significantly increases the fan energy consumption; moreover, existing technologies have insufficient capture capacity for small-particle droplets (≤10μm), making it difficult to meet ultra-clean emission requirements. Summary of the Invention

[0005] The purpose of the present invention is to provide a clogging-resistant separation component and a demister to solve the technical problems in the prior art such as increased resistance due to the increase in the number of layers and insufficient ability to capture small-size droplets.

[0006] The present invention provides an anti-clogging separation assembly, comprising: a ridge-type frame and a plurality of baffle bodies arranged inside the ridge-type frame, wherein the baffle bodies are arranged at equal intervals, and the interval between two adjacent baffle bodies is 45 mm to 120 mm; an isolation element is provided between two adjacent baffle bodies; Each baffle body comprises an inlet section, a first curvature arc section and an outlet section arranged along the flow direction of the vapor-liquid mixture; The first curvature arc segment is a sine wave curve, and the crest of the first curvature arc segment is smoothly connected to the second curvature arc segment; the angle between the first curvature arc segment and the second curvature arc segment is 30° to 60°; The outlet section and the isolation element have the same arc-shaped surface radius.

[0007] Furthermore, two isolation elements are provided between two adjacent baffle bodies, and the upper ends of the isolation elements are connected to the ridge frame.

[0008] Furthermore, a hook-shaped portion smoothly extends outward from the end of the outlet section of each baffle body; a hook-shaped portion smoothly extends outward from the end of the isolation element; and a water retaining groove is formed between each hook-shaped portion and the corresponding end of the outlet section or the end of the isolation element.

[0009] Furthermore, the ridge frame includes inner and outer clamping rods that connect all the baffle bodies and the isolation elements at regular intervals; The inlet section, the outlet section and the isolation element are respectively clamped between the inner clamping rod and the outer clamping rod.

[0010] Furthermore, the wavelength of the first curvature arc segment is 60 mm to 110 mm.

[0011] Furthermore, the radius of the arc surface of the first curvature arc segment is greater than the radius of the arc surface of the second curvature arc segment.

[0012] Furthermore, the material of the baffle body is stainless steel, and the windward surface of the baffle body is coated with a liquid-philic coating.

[0013] The present invention also provides a demister, comprising the above-mentioned anti-clogging separation component and flushing component; The flushing nozzle of the flushing assembly is arranged above and / or below the ridge frame; the spraying range of the flushing nozzle covers the gap between the baffle body and the isolation element.

[0014] Beneficial effects: The anti-clogging separation assembly and demister provided by the present invention significantly improve demisting efficiency by providing a baffle body with a combination of a specific sinusoidal curve and a second curvature arc segment, and by providing a specifically structured isolation element between adjacent baffle bodies. The arc setting of the baffle body, combined with the optimization of the droplet path by the isolation element, forms a three-stage interception mechanism, which significantly enhances the capture of tiny droplets below 10μm, increasing demisting efficiency by 30%-50% compared to traditional technologies. By utilizing the characteristic that the downstream flue gas flow velocity is higher than the inlet flow velocity, the three-stage interception process strengthens the capture of small droplets, breaking through the bottleneck of traditional demister efficiency degradation at high flow rates.

[0015] The flow channel formed by the present invention can weaken the vortex effect, reduce the airflow resistance by more than 40%, and reduce the energy consumption of the fan; avoid the increase in resistance caused by increasing the number of layers or reducing the spacing, and reduce the power generation cost.

[0016] Furthermore, the integrated demister of the present invention boasts a simple structure and is easy to flush, while preventing dust accumulation and scaling, achieving a balance between demisting efficiency and operational economy. Furthermore, it is particularly suitable for desulfurization towers in older coal-fired power plants, where large-scale renovations are not possible due to space constraints. Its compact structure allows it to maintain high demisting efficiency and low resistance even in high-flow flue gas environments (e.g., ≥5 m / s). By separating the structure and size of the components, efficient demisting is achieved under ultra-clean emission requirements without requiring expansion or renovation of the desulfurization tower, alleviating space constraints. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of a baffle body and a separation element in an anti-clogging separation assembly provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a ridge-type frame in an anti-blocking separation assembly provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a demister provided in an embodiment of the present invention.

[0019] Icons: 1- ridge frame; 101- inner clamping rod; 102- outer clamping rod; 2- baffle body; 201- inlet section; 202- first curvature arc section; 203- outlet section; 204- second curvature arc section; 3- isolating element; 4- hook portion; 5- flushing assembly. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0025] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0027] like Figure 1 、 Figure 2 As shown, the present invention provides an anti-clogging separation assembly, comprising: a ridge frame 1 and a plurality of baffle bodies 2 arranged inside the ridge frame 1; Several baffle bodies 2 are arranged at equal intervals, and the interval between two adjacent baffle bodies 2 is 45 mm to 120 mm; preferably, 100 mm; an isolation element 3 is provided between two adjacent baffle bodies 2; Each baffle body 2 includes an inlet section 201, a first curvature arc section 202 and an outlet section 203 arranged along the flow direction of the vapor-liquid mixture; The first curvature arc segment 202 is a sine wave curve, and the crest of the first curvature arc segment 202 is smoothly connected to the second curvature arc segment 204; the angle between the first curvature arc segment 202 and the second curvature arc segment 204 is 30° to 60°, preferably 45°; The outlet section 203 and the isolation element 3 have the same arc-shaped surface radius.

[0028] Specifically, the ridge-type frame 1 serves as an integral supporting structure, forming an angle shape, and the joints can be fixed with bolts; a number of baffle bodies 2 are installed inside it in a parallel and equidistant state, and the spacing between two adjacent baffle bodies 2 is 100 mm, and isolation elements 3 are fixedly installed in the gap to form an alternating arrangement. Each baffle body 2 is connected to the inlet section 201, the first curvature arc section 202 and the outlet section 203 in sequence along the flow direction of the gas-liquid mixture: the inlet section 201 is the starting part of the air inlet side of the baffle body 2, and its end is smoothly connected to the starting end of the first curvature arc section 202; the first curvature arc section 202 adopts a sine wave curve, and its peak position is smoothly connected to one end of the second curvature arc section 204, and a 45° angle is formed between the first curvature arc section 202 and the second curvature arc section 204, so that the two arcs form a continuous and angular turning structure at the peak; the outlet section 203 is connected to the end of the first curvature arc section 202, and the radius of its arc surface is completely consistent with the radius of the arc surface of the adjacent isolation element 3, forming a corresponding relationship of curvature matching.

[0029] The sinusoidal wave design of the first curvature arc segment 202 prolongs the residence time of the flue gas in the baffle body 2. Combined with the second curvature arc segment 204 with an angle of 30° to 60°, it can guide the droplets to accurately collide with the arc surface due to the inertial force when turning, and achieve initial interception of the droplets by increasing the effective contact area and the residence time; its unique large curvature arc design changes the direction of the flue gas flow and guides the droplets to collide more accurately with the downstream demister elements. Combined with the optimization of the droplet displacement path by the isolation element, it significantly improves the capture ability of tiny droplets below 10μm, breaking through the problem of traditional demisters in handling small-particle-size particles, and forming the first and second interceptions.

[0030] The equal-radius arc surface design of the outlet section 203 and the isolation element 3 allows the airflow to flow along a smooth path to the isolation element 3 after flowing out of the deflector body 2, shortening the droplet displacement distance, further improving the capture efficiency, and forming a third interception; the equally spaced arrangement of the deflector body 2 and the embedding of the isolation element 3 not only ensure the smooth flow of high-velocity flue gas (≥5m / s), but also divide the flow channel through the isolation element 3, and utilize the downstream airflow acceleration characteristics under high-velocity conditions to greatly improve the capture efficiency of tiny droplets in the third interception. Compared with traditional single-time interception technology, the demisting efficiency can be increased by 30%-50%, ensuring that the emission droplet concentration is stable and meets the standard.

[0031] At the same time, the smooth connection avoids dust accumulation and scaling caused by sharp corners, and the reasonable spacing facilitates flushing, significantly reducing the risk of blockage, and is suitable for the high flow rate and limited space requirements of the desulfurization tower of old units.

[0032] In the embodiment of the present invention, two isolation elements 3 are provided between two adjacent baffle bodies 2 , and the upper ends of the isolation elements 3 are connected to the ridge frame 1 .

[0033] The outlet section end of each baffle body smoothly extends outward with a hook-shaped portion; the isolation element end smoothly extends outward with a hook-shaped portion; a water retaining groove is formed between each hook-shaped portion and the corresponding outlet section end or isolation element end.

[0034] The ridge frame 1 includes an inner clamping rod 101 and an outer clamping rod 102 that connect all the baffle bodies 2 and the isolation elements 3 at regular intervals; The inlet section 201 , the outlet section 203 and the isolation element 3 are respectively sandwiched between the inner clamping rod 101 and the outer clamping rod 102 .

[0035] Specifically, two isolation elements 3 are arranged in parallel between two adjacent baffle bodies 2. The two isolation elements 3 are spaced apart along the length direction of the baffle body 2. Their upper ends are fixedly connected to the ridge frame 1, and their lower ends naturally extend to the outlet section 203 of the baffle body 2 at a uniform height, forming a double-layer isolation structure.

[0036] The end of the outlet section 203 of each baffle body 2 and the lower ends of the two isolation elements 3 are smoothly extended outward along the direction of smoke flow with a hook-shaped portion 4. The connection between the hook-shaped portion 4, the outlet section 203 and the isolation element 3 forms an inwardly concave water retaining groove, and the groove opening faces the smoke.

[0037] The inner clamping rod 101 and the outer clamping rod 102 of the ridge frame 1 are long rods arranged in parallel.

[0038] The double-layer setting of the two isolation elements 3 divides the flow channel between the adjacent baffle bodies 2 into three sub-flow channels, which can guide the flue gas flow direction more accurately, reduce flow field turbulence, and cooperate with the fixed distance of the inner clamping rod 101 and the outer clamping rod 102 to ensure the stability of the flow resistance of high-speed flue gas and avoid efficiency attenuation caused by spacing fluctuations; the water-retaining groove of the hook-shaped part 4 can quickly gather the captured droplets to prevent them from being re-atomized (secondary carryover) under the scouring of the airflow, especially the retention effect on tiny droplets below 10μm, which further improves the demisting efficiency.

[0039] In the embodiment of the present invention, the wavelength of the first curvature arc segment 202 is 60 mm to 110 mm, preferably 80 mm.

[0040] The radius of the arc surface of the first curvature arc segment 202 is greater than the radius of the arc surface of the second curvature arc segment 204 .

[0041] The baffle body 2 is made of stainless steel, and the windward surface of the baffle body 2 is coated with a liquid-philic coating.

[0042] Specifically, the first curvature arc segment 202 adopts a sinusoidal wave curve, which is half a wave, and its wavelength (the straight-line distance between two adjacent wave peaks) is 60mm to 110mm, preferably 80mm. This size enables the sinusoidal wave curve to form a uniformly distributed arc flow channel; at the same time, the arc surface radius of the first curvature arc segment 202 is greater than the arc surface radius of the second curvature arc segment 204, thereby enhancing the centrifugal force when the smoke is turned.

[0043] The baffle body 2 is entirely made of stainless steel, and its windward surface, including the air inlet side surface of the inlet section 201 and the arc surface of the first curvature arc section 202 in contact with the flue gas, is coated with a liquid-philic coating, which is perfluoropolyether.

[0044] The wavelength design balances the flue gas residence time and the flow resistance. A wavelength that is too large will increase the resistance, while a wavelength that is too small will shorten the droplet collision path. The combination of large curvature and small curvature can enhance the centrifugal displacement of small droplets during turning, thereby improving the collision capture efficiency. The baffle body 2 made of stainless steel has excellent corrosion resistance and mechanical strength, and can withstand long-term erosion by high-velocity flue gas and acid and alkali corrosion in the desulfurization environment; the lyophilic coating on the windward side can reduce the contact angle between the droplets and the plate surface, allowing the captured droplets to spread quickly and condense into large droplets, reducing the droplet rebound or secondary atomization caused by surface tension, and cooperating with the interception effect of the hook-shaped portion 4 to further reduce the concentration of discharged droplets.

[0045] The present invention also provides a demister, such as Figure 3 As shown, it includes the anti-clogging separation component and flushing component 5 in any of the above embodiments; The flushing nozzle of the flushing assembly 5 is arranged above and / or below the ridge frame 1; the spraying range of the flushing nozzle covers the gap between the baffle body 2 and the isolation element 3.

[0046] Based on the above embodiments, the working process of the anti-clogging separation assembly and demister of the present invention is as follows: The vapor-liquid mixture (flue gas) enters through the inlet sections 201 of two adjacent baffle bodies 2 and flows along the sinusoidal flow path of the first curvature arc segment 202. The sinusoidal design prolongs the flue gas's retention time. Combined with the second curvature arc segment 204 connected at the wave crest, this allows the inertial force of the flue gas to collide with the curved surface as the flue gas deflects, achieving the initial interception of large droplets. Small droplets, guided by the curved surface, flow downstream, achieving a secondary interception.

[0047] As the flue gas continues to flow through the outlet section 203, two isolation elements 3 between adjacent baffle bodies 2 divide the flow path into sub-channels, reducing airflow turbulence. The outlet section 203 and the uniformly curved surfaces of the isolation elements 3 work together to shorten the droplet displacement path, allowing tiny droplets to be intercepted by the isolation elements 3, completing a triple interception. Simultaneously, the outlet section 203 and the hook-shaped portions 4 at the ends of the isolation elements 3 form a water-retaining groove that quickly collects captured droplets and prevents them from being re-atomized by the high-speed airflow.

[0048] After three levels of interception, the purified flue gas flows out from the top of the baffle body 2, meeting ultra-clean emission requirements. The nozzles of the flushing assembly 5 regularly spray from above and below the ridge frame 1, covering the gap between the baffle body 2 and the isolation element 3, removing residual dust and scale to prevent clogging.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-clogging separation assembly comprising: A ridge-type frame (1) and a plurality of baffle bodies (2) arranged inside the ridge-type frame (1), characterized in that: The plurality of baffle bodies (2) are arranged at equal intervals, and the interval between two adjacent baffle bodies (2) is 45 mm to 120 mm; an isolation element (3) is provided between two adjacent baffle bodies (2); Each of the baffle bodies (2) comprises an inlet section (201), a first curvature arc section (202), and an outlet section (203) arranged along the flow direction of the vapor-liquid mixture; The first curvature arc segment (202) is a sine wave curve, and the crest of the first curvature arc segment (202) is smoothly connected to the second curvature arc segment (204); the angle between the first curvature arc segment (202) and the second curvature arc segment (204) is 30° to 60°; The outlet section (203) and the isolation element (3) have the same arc-shaped surface radius.

2. The anti-clogging separation assembly according to claim 1, characterized in that The number of the isolation elements (3) provided between two adjacent baffle bodies (2) is two, and the upper ends of the isolation elements (3) are connected to the ridge frame (1).

3. The anti-clogging separation assembly according to claim 2, characterized in that The end of the outlet section (203) of each baffle body (2) smoothly extends outwards with a hook-shaped portion (4); the end of the isolation element (3) smoothly extends outwards with a hook-shaped portion (4); and a water retaining groove is formed between each hook-shaped portion (4) and the corresponding end of the outlet section (203) or the end of the isolation element (3).

4. The anti-clogging separation assembly according to claim 3, characterized in that The ridge-type frame (1) comprises an inner clamping rod (101) and an outer clamping rod (102) that connect all the baffle bodies (2) and the isolation elements (3) at regular intervals. The inlet section (201), the outlet section (203) and the isolation element (3) are respectively clamped between the inner clamping rod (101) and the outer clamping rod (102).

5. The anti-clogging separation assembly according to claim 1, characterized in that The wavelength of the first curvature arc segment (202) is 60 mm to 110 mm.

6. The anti-clogging separation assembly according to claim 4, characterized in that The radius of the arc surface of the first curvature arc segment (202) is greater than the radius of the arc surface of the second curvature arc segment (204).

7. The anti-clogging separation assembly according to claim 1, characterized in that The baffle body (2) is made of stainless steel, and the windward surface of the baffle body (2) is coated with a liquid-philic coating.

8. A demister, characterized in that: comprising the anti-clogging separation component and flushing component (5) as claimed in any one of claims 1 to 7; The flushing nozzle of the flushing assembly (5) is arranged above and / or below the ridge frame (1); the spraying range of the flushing nozzle covers the gap between the baffle body (2) and the isolation element (3).

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