Efficient demister blade with hydrophobic characteristic
By designing high-efficiency demister blades with hydrophobic properties, adopting a barbed and retention groove structure, combining hydrophobic materials, and optimizing the blade curvature, the problems of secondary water carryover and increased resistance in improving the demister's demisting efficiency are solved, achieving a balance between high-efficiency demisting and low energy consumption.
Patent Information
- Application Number
- CN202520350900.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-03
AI Technical Summary
While existing demisters increase flue gas velocity and deflection frequency to improve demisting efficiency, they are prone to secondary water carryover and increased system resistance, making it difficult to balance high-efficiency demisting with low energy consumption.
A high-efficiency demister blade with hydrophobic properties was designed. The blade body is integrally molded and includes a barbed structure and retention groove. Combined with hydrophobic materials such as PVDF, PPG or PPTV, the curvature and structure of the blade are optimized to form a special curved channel to enhance droplet capture and reduce secondary entrainment.
It improves droplet capture efficiency, reduces the probability of secondary water carryover, lowers system resistance and energy consumption, and achieves efficient demisting while maintaining low energy consumption.
Smart Images
Figure CN223818349U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of demisting technology in the flue gas wet desulphurization process, more particularly to a high -efficient demister vane with hydrophobic characteristics. BACKGROUND
[0002] The demister is widely used in the flue gas wet desulphurization engineering project to remove the slurry droplets entrained in the flue gas, and its working principle is as follows: the wet flue gas after desulphurization flows through the demister at a certain speed, the flue gas is quickly and continuously changed in direction, and due to the centrifugal force and inertia, the mist carried in the flue gas collides with the wave-shaped plate of the demister and gradually converges into large droplets, the multi-turn structure of the wave-shaped plate of the demister increases the chance of mist being captured, and the mist that is not removed is captured at the next turn through the same effect, thereby greatly improving the demisting efficiency. When the gravity of the droplet itself exceeds the combined force of the upward force of the gas and the surface tension of the liquid, the droplet is separated from the surface of the wave-shaped plate, and the captured mist droplets are collected to form a water flow and fall into the slurry pool, thereby realizing gas-liquid separation and making the flue gas flowing through the demister meet the demisting requirements and then be discharged.
[0003] The demister is arranged in a certain way by demister modules, the demister modules are arranged at a certain interval by demister vanes, and the gap between the demister vanes serves as a flue gas flow passage. The demisting efficiency of the demister increases with the increase of the flue gas flow rate and the number of flue gas turns, when the demister vanes are arranged densely, the flue gas flows through the demister at a high flow rate, and the inertial force acting on the mist droplets is large; the number of turns of the demister vane is large, and the chance of mist droplets being captured is increased, which are all conducive to the separation of gas and liquid, but inevitably increase the system resistance and increase the energy consumption of the induced draft fan. Since there is a certain limit to the increase of flow rate, too high flow rate will cause secondary water entrainment, thereby reducing the demisting efficiency. Generally, the highest flue gas flow rate through the demister cross section without causing secondary water entrainment is defined as the critical flow rate, which is related to factors such as the structure of the demister, the system water entrainment load, the gas flow direction, and the arrangement mode of the demister.
[0004] Therefore, it is necessary to develop a high-efficiency demister vane that can improve the demisting efficiency by increasing the flue gas flow rate and the number of flue gas turns, reduce the probability of secondary water entrainment of flue gas, and reduce the resistance of the demister. UTILITY MODEL CONTENTS
[0005] The utility model aims at overcoming the defects in the above background art, and provides a high-efficiency demister vane with hydrophobic characteristics.
[0006] In order to achieve the above object, the technical scheme of the utility model is: a high-efficiency demister blade with hydrophobic characteristics, characterized by comprising an integrally-formed blade body, the blade body comprises an inlet straight section, a connecting arc section, a capturing straight section, a turning arc section, a capturing arc section and an outlet straight section connected in sequence from bottom to top, a plurality of retention grooves are arranged on the right side of the turning arc section, a first barb is arranged on the left side of the turning arc section close to one end of the capturing arc section, and a second barb is arranged on the right side of the capturing arc section close to one end of the outlet straight section.
[0007] In the above technical scheme, the left side of the capturing arc section close to one end of the outlet straight section is provided with a mist droplet intercepting groove; and the mist droplet intercepting groove is located above the second barb.
[0008] In the above technical scheme, the inlet straight section, the connecting arc section, the capturing straight section, the turning arc section, the capturing arc section and the outlet straight section are connected in sequence in the tangential direction.
[0009] In the above technical scheme, the lower end of the inlet straight section and the upper end of the outlet straight section are provided with fixing strips, and the inlet straight section and the outlet straight section are provided with fixing holes.
[0010] In the above technical scheme, the length of the inlet straight section and the outlet straight section is 10-30 mm, and the thickness is 2-4 mm; the curvature of the connecting arc section is 15-30 mm, and the arc direction is left; the curvature of the turning arc section is 20-40 mm, and the arc direction is right; and the curvature of the capturing arc section is 80-120 mm, and the arc direction is left.
[0011] In the above technical scheme, the curvature of the first barb is 12-20 mm, the opening direction of the first barb is downward, one end of the first barb is connected to the capturing arc section in a smooth transition mode, and the distance between the other end of the first barb and the turning arc section is 5-20 mm; the opening direction of the second barb is downward, one end of the second barb is connected to the capturing arc section, and the distance between the other end of the second barb and the capturing arc section is 3-10 mm.
[0012] In the above technical scheme, the retention grooves are 7-15 in number, the groove width of the retention grooves is 2-6 mm, and the groove depth is 0.5-1.5 mm.
[0013] In the above technical scheme, the blade body is integrally formed by injection molding, and the material of the blade body is PVDF or PPG or PPTV.
[0014] In the above technical scheme, a plurality of the blade bodies are fixed to form a demister module unit through a rod, and a plurality of the demister module units are connected to form a demister module in a circular or square shape through bolts or comb-shaped teeth.
[0015] In the above technical scheme, the plurality of demister modules are in the shapes of ∧, V, rhombus or X.
[0016] Compared with the prior art, the utility model has the following advantages:
[0017] 1) The utility model discloses be added first barb and second barb on the surface of the blade body, and the barb can block the liquid drop in the flue gas, is favorable to liquid discharge and improves the flue gas flow velocity, improves demisting effect.
[0018] 2) The utility model discloses set up the retention groove, strengthens the capture interception mist drop in the flue gas, makes the mist drop of adhering to the surface of the blade body not easy to be secondly entrained, is provided with the mist drop interception groove in the capture circular arc section, further reduces the second entrainment probability of flue gas, thereby improves the separation efficiency.
[0019] 3) The utility model discloses adopt fluorine base and so on superhydrophobic material, increase the hydrophobicity of the surface of the blade body, and the liquid drop on the blade body is more easy to drop to the slurry pool, and the blade body has self-cleaning nature then, can reduce the washing to the blade body, reduce energy consumption, overcome the shortcoming that the surface of the blade body sticks dirt and does not wash.
[0020] 4) The utility model discloses the optimum curvature of the blade body, and the inlet straight section, the connecting arc section, the capture straight section, the turning circular arc section, the capture circular arc section and the outlet straight section are sequentially tangentially connected, so that the demister passage is more smooth flow field, and the speed is increased, and the turning, the retention section is distinct, and it is favorable to improve the demisting efficiency.
[0021] 5) The utility model discloses be provided with first barb on the left side of the turning circular arc section of the blade body close to one end of the capture circular arc section, be provided with second barb on the right side of the capture circular arc section close to one end of the outlet straight section, be provided with a plurality of retention grooves on the right side of the turning circular arc section, and the first barb, the retention groove and the second barb form a special curved passage, when the flue gas passes through this passage, has the significant features such as turning, increasing speed, reducing speed, liquid drop retention, and the mist drop performance of the surface of the blade body is more excellent.
[0022] 6) The utility model discloses the fixed strip cooperation comb type tooth forms the buckle structure convenient to install.
[0023] 7) The utility model discloses the blade body is one injection molding, and production efficiency is high, and production precision is high, and the blade body of injection molding has first barb, second barb, retention groove, mist drop interception groove, fixed strip and fixed hole, and the integration is high. DRAWINGS
[0024] Figure 1 It is the structure schematic diagram of the blade body in the utility model.
[0025] Figure 2 It is the plan view of the blade body.
[0026] Figure 3Structure schematic view when the demister module is in a V shape.
[0027] Figure 4 Structure schematic view when the demister module is in a V shape.
[0028] Figure 5 Structure schematic view when the demister module is in a diamond shape.
[0029] Figure 6 Structure schematic view when the demister module is in an X shape.
[0030] Wherein, 100-blade body, 110-inlet straight section, 120-connection arc section, 130-capture straight section, 140-turning circular arc section, 141-retention groove, 150-capture circular arc section, 151-mist droplet intercepting groove, 160-outlet straight section, 171-first barb, 172-second barb, 180-fixing strip, 190-fixing hole, 210-rod, 220-bolt or comb tooth, A-demister module unit, B-demister module. DETAILED DESCRIPTION
[0031] The embodiments of the present application will be described in detail below with reference to the drawings, but they do not constitute limitations on the present application, and are only examples. At the same time, through the description, the advantages of the present application will become clearer and easier to understand.
[0032] As shown in the drawings, the high-efficiency demister blade with hydrophobic characteristics comprises an integrally formed blade body 100, wherein the blade body 100 comprises an inlet straight section 110, a connection arc section 120, a capture straight section 130, a turning circular arc section 140, a capture circular arc section 150 and an outlet straight section 160 connected in sequence from bottom to top; the turning circular arc section 140 is provided with a plurality of retention grooves 141 on the right side, and the first barb 171 is arranged on the left side of the turning circular arc section 140 close to one end of the capture circular arc section 150; the capture circular arc section 150 is provided with the second barb 172 on the right side close to one end of the outlet straight section 160.
[0033] The thickness of the blade body 100 is 2-4 mm.
[0034] The capture circular arc section 150 is provided with the mist droplet intercepting groove 151 on the left side close to one end of the outlet straight section 160; the mist droplet intercepting groove 151 is located above the second barb 172.
[0035] The inlet straight section 110, the connection arc section 120, the capture straight section 130, the turning circular arc section 140, the capture circular arc section 150 and the outlet straight section 160 are connected in sequence.
[0036] The lower end of the inlet straight section 110 and the upper end of the outlet straight section 160 are provided with a fixing strip 180, which can be circular or semicircular, 3-6 mm in size, and further can be square or oval; the inlet straight section 110 and the outlet straight section 160 are provided with a fixing hole 190.
[0037] The length of the inlet straight section 110 and the outlet straight section 160 is 10-30 mm, and the thickness is 2-4 mm; the curvature of the connecting arc section 120 is 15-30 mm, and the direction of the circular arc is left; the curvature of the turning arc section 140 is 20-40 mm, and the direction of the circular arc is right; the curvature of the capture arc section 150 is 80-120 mm, and the direction of the circular arc is left.
[0038] The curvature of the first barb 171 is 12-20 mm, and the opening direction of the first barb 171 is downward; one end of the first barb 171 is connected to the capture arc section 150 in a smooth transition, and the distance between the other end of the first barb 171 and the turning arc section 140 is 5-20 mm; the opening direction of the second barb 172 is downward, and the distance between one end of the second barb 172 and the capture arc section 150 and the other end of the second barb 172 and the capture arc section 150 is 3-10 mm.
[0039] The retention groove 141 has 7-15 grooves, and the groove width is 2-6 mm and the groove depth is 0.5-1.5 mm.
[0040] The blade body 100 is one-time injection molded, and the material of the blade body 100 is PVDF or PPG or PPTV.
[0041] A plurality of the blade bodies 100 are fixed to form a demister module unit A by a rod 210, and a plurality of the demister module units A are combined to form a circular or square shaped demister module B by bolts or comb-shaped teeth 220. A plurality of the blade bodies 100 are arranged at a distance of 20-40 mm, and the plurality of blade bodies 100 can be arranged at equal intervals or at variable intervals, and adjacent demister module units A are installed at an inclination angle of 37.5°.
[0042] A plurality of the demister module B is in the shape of ∧, V, rhombus or X.
[0043] In actual use, the outlet straight section 160 ensures that the outlet flue gas is vertically upward; a special curved channel is formed between the first barb 171, the mist droplet interception groove 151 and the second barb 172, and the flue gas has the characteristics of turning, increasing speed, reducing speed and liquid droplet retention when passing through the channel, and the performance of the blade body 100 in capturing mist droplets is better.
[0044] The other parts not described belong to the prior art.
Claims
1. A high-efficiency demister blade with hydrophobic properties, characterized in that: The blade body (100) is integrally formed. The blade body (100) includes an inlet straight section (110), a connecting arc section (120), a capture straight section (130), a turning arc section (140), a capture arc section (150), and an outlet straight section (160) connected sequentially from bottom to top. The turning arc section (140) has a plurality of retention grooves (141) on its right side. The turning arc section (140) has a first barb (171) on its left side near the end of the capture arc section (150). The capture arc section (150) has a second barb (172) on its right side near the end of the outlet straight section (160).
2. The high-efficiency demister blade with hydrophobic properties according to claim 1, characterized in that: A droplet interception groove (151) is provided on the left side of the capture arc segment (150) near the outlet straight segment (160); the droplet interception groove (151) is located above the second barb (172).
3. The high-efficiency demister blade with hydrophobic properties according to claim 1, characterized in that: The inlet straight section (110), connecting arc section (120), capturing straight section (130), turning arc section (140), capturing arc section (150) and outlet straight section (160) are connected tangentially in sequence.
4. The high-efficiency demister blade with hydrophobic properties according to claim 1, characterized in that: The lower end of the inlet straight section (110) and the upper end of the outlet straight section (160) are both provided with fixing strips (180), and fixing holes (190) are opened in both the inlet straight section (110) and the outlet straight section (160).
5. The high-efficiency demister blade with hydrophobic properties according to claim 3, characterized in that: The length of the inlet straight section (110) and the outlet straight section (160) is 10-30mm and the thickness is 2-4mm; the curvature of the connecting arc section (120) is 15-30mm and the arc direction is to the left; the curvature of the turning arc section (140) is 20-40mm and the arc direction is to the right; the curvature of the capturing arc section (150) is 80-120mm and the arc direction is to the left.
6. The high-efficiency demister blade with hydrophobic properties according to claim 5, characterized in that: The first barb (171) has a curvature of 12-20mm, the opening direction of the first barb (171) is downward, one end of the first barb (171) is smoothly connected to the capture arc segment (150), and the distance between the other end and the turning arc segment (140) is 5-20mm; the second barb (172) has an opening direction of downward, one end of the second barb (172) is connected to the capture arc segment (150), and the distance between the other end and the capture arc segment (150) is 3-10mm.
7. The high-efficiency demister blade with hydrophobic properties according to claim 1, characterized in that: There are 7-15 retention grooves (141), with a groove width of 2-6mm and a groove depth of 0.5-1.5mm.
8. The high-efficiency demister blade with hydrophobic properties according to claim 1, characterized in that: The blade body (100) is injection molded in one piece, and the material of the blade body (100) is PVDF, PPG or PPTV.
9. The high-efficiency demister blade with hydrophobic properties according to claim 1, characterized in that: Multiple blade bodies (100) are fixed together by a through rod to form a demister module unit (A), and multiple demister module units (A) are formed into a circular or square demister module (B) by bolts or comb teeth.
10. A high-efficiency demister blade with hydrophobic properties according to claim 9, characterized in that: The multiple demister modules (B) are in the shape of a ∧, V, rhombus, or X.