A blade type demisting module and demisting device

Abstract

The present invention relates to a blade-type demisting module, comprising an end plate and a plurality of blade units connected to the end plate; the plurality of blade units are arranged in parallel, each blade unit comprises at least a first blade, a second blade and a third blade, the first blade is configured to bend in the direction of the second blade to guide the rising airflow to move toward the second blade, and a gap is left between the end of the first blade and the second blade; the second blade is configured to bend in the opposite direction of the bending direction of the first blade, so that the airflow changes its direction of movement when it contacts the second blade and moves toward the third blade; a gap is left between the third blade and the second blade; the gaps between the first blade and the second blade, and between the second blade and the third blade together constitute a channel for the airflow to pass through. The present invention also relates to a demister equipped with the above-mentioned blade-type demisting module, which has high demisting efficiency, small pressure loss, is not easy to scale and clog, and is easy to clean.

Description

Technical Field

[0001] The invention relates to a demisting device for filtering mist droplets in smoke, in particular to a blade type demisting module and a demisting device. Background Art

[0002] Existing baffle demisters mainly use the principle of inertial collision to remove droplets from the gas. By setting curved demister blades in the airflow channel to change the direction of the airflow, the droplets in the gas collide with the blade surface under the action of inertial force, and small droplets continue to accumulate on the blade surface and condense to form large droplets, which drip under the action of gravity, thereby achieving the purpose of gas-liquid separation. In order to improve the capture efficiency, existing demister blades usually add fins to the demister blades to increase the interception area, but narrow grooves will be formed at the roots of the fins, which are prone to accumulation of solids and cause demister blockage, and the hook grooves are basically flushing dead corners, and the blockage cannot be effectively removed by flushing. On the other hand, it also increases the pressure loss of the demister. If you want to remove smaller droplets, the method of adding fins will cause a sharp increase in pressure loss, which is usually not allowed in application scenarios.

[0003] The present invention is proposed in view of the above. Summary of the invention

[0004] One object of the present invention is to overcome the deficiencies of the prior art and to provide a blade-type demisting module which is easy to flush, not prone to clogging, and has high demisting efficiency and low pressure loss.

[0005] Another object of the present invention is to provide a demister including the above-mentioned blade-type demister module.

[0006] In order to achieve the first invention objective, the present invention adopts the following technical solution:

[0007] A blade type demisting module comprises an end plate and a plurality of blade units vertically connected to the end plate; the plurality of blade units are arranged in parallel along a horizontal direction, and each blade unit comprises at least a first blade, a second blade and a third blade arranged in sequence from bottom to top, wherein:

[0008] The first blade is configured to bend toward the second blade to guide the airflow toward the second blade, and a gap is left between the end of the first blade and the second blade;

[0009] The second blade is configured to bend in the opposite direction of the bending direction of the first blade, so that the airflow changes its moving direction when contacting the second blade and moves toward the third blade;

[0010] A gap is left between the third blade and the second blade; the gaps between the first blade and the second blade, and between the second blade and the third blade together form a channel for airflow to pass through.

[0011] Furthermore, the lower end of the third blade extends toward the second blade in a surrounding shape, and the upper end extends upward in the vertical direction.

[0012] Furthermore, the third blade includes an intercepting portion and a fixing portion, the intercepting portion has a forked cross-section and forms an inverted V-shaped fork; the fixing portion is connected to the back side of the fork and is a vertical plate-like structure.

[0013] Further, the first blade includes:

[0014] The first air guide portion extends downward in a direction parallel to the airflow and forms a tip;

[0015] A first arc segment connected to the first guide portion and extending upward, wherein the first arc segment bends toward the second blade;

[0016] a second arc segment connected to the first arc segment and extending upward, wherein the bending angle of the second arc segment is opposite to that of the first arc segment;

[0017] The first bending structure is connected to the second arc segment and bends toward the second blade. The end of the first bending structure forms a tip and points to the second blade.

[0018] Further, the second blade includes:

[0019] A second guide portion, the second guide portion extends downward along the same angle as the second arc segment and forms a tip;

[0020] A second bending structure is connected to the second guide portion and is bent in a direction opposite to the first bending structure;

[0021] An extension portion connected to the second bending structure guides the airflow to flow toward the third blade and forms a tip pointing to the third blade.

[0022] Furthermore, the first blade, the second blade and the third blade are arc-shaped blade structures.

[0023] Furthermore, the lower end of the first blade and the upper end of the third blade respectively extend a certain length in the vertical direction to form an extended structure.

[0024] Furthermore, a downwardly protruding sharp corner is provided in the middle of the third blade, and the sharp corner is located at the starting end of the extension structure.

[0025] In order to achieve the second invention objective, the present invention adopts the following technical solution:

[0026] A demister equipped with the above-mentioned blade-type demister module, wherein the demister is formed by splicing a plurality of blade-type demister modules.

[0027] Furthermore, the demister is a flat-plate demister, a ridge-type demister or a horizontal flue-type demister.

[0028] The technical solution of the present invention brings the following beneficial effects:

[0029] 1. The blade-type demisting module of the present invention adopts segmented blades, and air flow channels are left between adjacent blades, which can not only effectively intercept droplets, but also reduce pressure loss and improve demisting efficiency. At an air flow speed of 4m / s, the minimum droplet size that can be removed is 10um, while the conventional demisting device can only reach 17um.

[0030] 2. The blade-type demisting module of the present invention is easy to clean, has no dead corners for flushing, is not easily clogged even after long-term use, and effectively reduces maintenance time.

[0031] 3. The demister of the present invention has the advantages of higher demister efficiency, smaller pressure loss, easy cleaning and less clogging, thus achieving better use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 : A structural diagram of the first embodiment of the present invention;

[0033] Figure 2 : A schematic cross-sectional view of a plurality of blade units according to the first embodiment of the present invention (arrows in the figure indicate the direction of movement of part of the airflow);

[0034] Figure 3 : A schematic cross-sectional view of a single blade unit according to the first embodiment of the present invention;

[0035] Figure 4 : A schematic cross-sectional view of a blade unit according to a second embodiment of the present invention (arrows in the figure indicate the direction of movement of part of the airflow);

[0036] Figure 5 : A schematic cross-sectional view of a blade unit according to a third embodiment of the present invention;

[0037] Figure 6 : A schematic cross-sectional view of a blade unit according to a fourth embodiment of the present invention;

[0038] Figure 7 : A schematic cross-sectional view of a blade unit according to a fifth embodiment of the present invention;

[0039] Figure 8 : A schematic cross-sectional view of a blade unit according to a sixth embodiment of the present invention:

[0040] Fig. 9 : Schematic diagram of the structure of the ridge type demister;

[0041] Among them: 1, blade unit 2, end plate 11, first blade 12, second blade 13, third blade 4, end plate 111, first guide part 112, first arc segment 113, second arc segment 114, first bending structure 121, second guide part 122, second bending structure 123, extension part 131, interception part 132, fixing part. DETAILED DESCRIPTION

[0042] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0043] Embodiment 1

[0044] like Figure 1 and Figure 2 As shown, a blade type demisting module comprises an end plate 2 and a plurality of blade units 1 vertically connected to the end plate 2. The end plates 2 are a pair, and the two end plates 2 are connected to the blade units 1 by clamping or welding. The end plates 2 play a role in fixing the blade units 1. The plurality of blade units 1 are arranged in parallel along the horizontal direction, and each blade unit 1 comprises at least a first blade 11, a second blade 12 and a third blade 13 arranged in sequence from bottom to top. When the airflow containing the mist droplets rises, it first contacts the first blade 11, then the second blade 12, and finally the third blade 13. When the mist droplets contact the blades, they condense on the blades and separate from the gas, thereby achieving a demisting effect.

[0045] The first blade 11 is bent toward the second blade 12 so that the rising airflow is deflected in the horizontal direction and hits the second blade 12, and a gap is left between the end of the first blade 11 and the second blade 12, and the gap constitutes a channel for the airflow to continue to move upward; the second blade 12 is bent in the opposite direction of the bending direction of the first blade 11 so that the airflow changes its direction of movement when it contacts the second blade 12 and moves toward the third blade 13, and the end of the second blade 12 points to the third blade 13, and the airflow rising along the second blade 12 will hit the third blade 13 after leaving the second blade 12; there is a gap between the third blade 13 and the second blade 12, and the rising airflow will change its direction of movement again when it contacts the third blade 13, and continue to rise in the vertical direction after leaving the third blade 13. The gaps between the first blade 11 and the second blade 12, and between the second blade 12 and the third blade 13 together constitute a channel for the airflow to pass through.

[0046] Combination Figure 2 and Figure 3 As shown, the lower end of the third blade 13 extends toward the second blade 12 in a surrounding shape, and the upper end extends upward in the vertical direction.

[0047] Specifically, the third blade 13 includes an intercepting portion 131 and a fixing portion 132. The cross-sectional shape of the intercepting portion 131 is forked and forms an inverted V-shaped fork. The fork formed by the intercepting portion 131 surrounds part of the second blade 12 downward and forms a fourth intercepting area d1. The intercepting portion 131 has two sharp corners extending downward, and the length of the sharp corner on one side of the bending direction of the second blade 12 is greater than the length of the sharp corner on the other side. In this way, the airflow rising along the second blade 12 will first hit the left side of the inner wall of the fork, and the droplets will condense on the third blade 13 under the action of inertia, while the light air will continue to flow outward from the right side along the inner wall of the fork, and finally leave the fork and move upward. The fixing portion 132 is connected to the back side of the fork and is a vertical plate-like structure. The fixing portion 132 mainly plays a positioning and supporting role.

[0048] The first blade 11 includes a first guide portion 111, a first arc segment 112, a second arc segment 113 and a first bending structure 114 formed from bottom to top. The first guide portion 111 extends downward in a direction parallel to the airflow and forms a tip. The rising airflow first contacts the first guide portion 111 and continues to move upward along the first guide portion 111. The first arc segment 112 is smoothly connected to the first guide portion 111 and extends upward to a certain height. The first blade 11 starts to bend from the first arc segment 112 to the direction of the second blade 12 to form a first interception area a1. When the airflow contacts the first interception area a1, the droplets with larger particle sizes are intercepted, and the droplets with smaller particle sizes and the air will be deflected in the horizontal direction and continue to flow upward. The second arc segment 113 is smoothly connected to the first arc segment 112 and extends upward to a certain height. The bending angle of the second arc segment 113 is opposite to that of the first arc segment 112. The first bending structure 114 is connected to the second arc segment 113 and is bent toward the second blade 12 to form a second interception area b1. The bending angle of the first bending structure 114 is close to or equal to 90°. The end of the first bending structure 114 forms a tip and points to the second blade 12. When the airflow contacts the first bending structure 114, it will turn sharply and move toward the second blade 12. The medium-sized droplets are intercepted when they contact the second interception area b1.

[0049] The second blade 12 includes a second guide portion 121, a second bending structure 122 and an extension portion 123. The second guide portion 121 extends downward along the same angle as the second arc segment 113 and forms a tip. The second bending structure 122 is connected to the second guide portion 121 and bends in the opposite direction to the first bending structure 114 to form a third interception area c1. When the airflow passes through the second bending structure 122, it turns sharply again to intercept droplets of smaller particle size. The extension portion 123 is connected to the second bending structure 122 to guide the airflow to flow toward the third blade 13. The end of the extension portion 123 forms a tip pointing to the third blade 13.

[0050] Preferably, the second guide portion 121 is at the same height as the second arc segment 113 in the horizontal direction.

[0051] Preferably, the width of the gap between the first blade 11 and the second blade 12, and between the second blade 12 and the third blade 13 is 15-40 mm.

[0052] The working process of this embodiment is as follows: first, the rising airflow carrying droplets enters the blade unit 1 from the gap between the two adjacent first blades 11. When the airflow contacts the first interception area a1, the droplets with larger particle sizes are intercepted first, and the droplets with smaller particle sizes and the air will be deflected and continue to rise. When the rising airflow moves to the tip of the second blade 12, it will be divided into two rising airflows and continue to flow upward. When the rising airflow contacts the second interception area b1 and the third interception area c1, the droplets with medium particle sizes are intercepted, and when the airflow moves to the highest point of the first blade, the two rising airflows will converge for the first time at approximately point e1. The collision and convergence of the airflows is conducive to the condensation of droplets and the capture of dust. The merged airflow continues to rise, and when it contacts the fourth interception area d1, some droplets are intercepted again, and then the two airflows in different directions converge for the second time at approximately point f1, and then move upward and separate from the blade unit. After multiple interceptions, the droplets in the airflow achieve a better demisting effect.

[0053] Embodiment 2

[0054] like Figure 4As shown, the difference between this embodiment and the first embodiment is that the first blade 11, the second blade 12 and the third blade 13 are arc-shaped blade structures, and are staggered from bottom to top. Preferably, the lower end of the first blade 11 and the upper end of the third blade 13 are respectively extended by a certain length in the vertical direction to form an extension structure, and the extension structure is used for positioning and matching with the end plate 2. The side of the first blade 11 bent toward the second blade 12 forms a first interception area a2, the side of the second blade 12 bent toward the first blade 11 or the third blade 13 forms a second interception area b2, and the side of the third blade 13 bent toward the second blade 12 forms a third interception area c2.

[0055] The working process of this embodiment is as follows: the rising airflow enters the blade unit 1 from the gap between two adjacent first blades 11, deflects once when passing through the first blade 11, and intercepts the mist droplets for the first time in the first interception area a2. The rising airflow hits the second blade 12 under the guidance of the first blade 11, and is divided into two airflows at the tip of the second blade 12. When the airflow reaches the position of approximately point e2, the two airflows from different directions merge for the first time. The collision and convergence of the airflow is conducive to the condensation of droplets and the capture of dust. The merged airflow contacts the second blade 12. At 12, deflection will occur, and the second interception of the droplets will be achieved in the second interception area b2. The second blade 12 guides the airflow to hit the third blade 13, and a second convergence will occur at about point f2. The merged airflow hits the third blade 13, and the third interception of the droplets is achieved in the third interception area c2. The droplets are intercepted three times, thereby achieving separation of the droplets from the air. It can be imagined that the number of the above blades can also be increased as needed, such as setting a fourth blade above the third blade 13, or even continuing to install the fifth blade, to achieve a better demisting effect.

[0056] Embodiment 3

[0057] like Figure 5 As shown, this embodiment is a further improvement on the basis of the second embodiment, in which a sharp corner is extended downward from the middle position of the third blade 13, and the sharp corner protrudes from the surface of the third blade 13, and the root of the sharp corner is connected to the starting end of the extension structure. By setting the sharp corner, the deflection angle of the airflow in the third interception area c2 can be increased, thereby improving the interception efficiency.

[0058] Embodiment 4

[0059] like Figure 6 As shown, this embodiment and the third embodiment have similar structures, and the only difference is that the bending angle of the third blade 13 of this embodiment is greater than the bending angle of the third blade 13 in the second embodiment.

[0060] Embodiment 5

[0061] like Figure 7As shown, this embodiment is similar in design to the first embodiment, except that the first bending structure 114 of the first blade 11 of this embodiment is eliminated, and the bending angle of the second bending structure 122 of the second blade 12 is less than 90 degrees.

[0062] Embodiment 6

[0063] like Figure 8 As shown, this embodiment is similar in design to the second embodiment, except that: sawtooth protrusions are added to each blade in this embodiment to enhance the demisting effect.

[0064] Combination Figure 1 and Fig. 9 As shown, the present invention also relates to a demister equipped with a blade-type demister module in any of the above-mentioned embodiments, wherein the demister is formed by splicing a plurality of blade-type demister modules.

[0065] Specifically, the demister is a flat-plate demister, a ridge-type demister or a horizontal flue-type demister.

[0066] The demister of the present invention has no dead corners during flushing, so it is not easy to get clogged. Moreover, since there are gaps between adjacent blades to form a channel for airflow to pass through, a smaller pressure loss can be achieved and the demisting efficiency is also improved.

[0067] The above is an embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, various modifications and improvements can be made without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.

Claims

1. A blade type demisting module, characterized in that: It includes an end plate and a plurality of blade units connected to the end plate; the plurality of blade units are arranged in parallel, and each blade unit includes at least a first blade, a second blade and a third blade arranged in sequence from bottom to top, wherein: The first blade is configured to bend toward the second blade to guide the rising airflow to move toward the second blade, and a gap is left between the end of the first blade and the second blade; The second blade is configured to bend in the opposite direction of the bending direction of the first blade, so that the airflow changes its moving direction and moves toward the third blade; A gap is left between the third blade and the second blade; the gaps between the first blade and the second blade, and between the second blade and the third blade together form a channel for airflow to pass through; The lower end of the third blade extends toward the second blade in a surrounding shape, and the upper end extends upward in a vertical direction.

2. A blade type demisting module according to claim 1, characterized in that: The third blade includes an intercepting portion and a fixing portion. The cross-sectional shape of the intercepting portion is forked and forms an inverted V-shaped fork. The fixing portion is connected to the back side of the fork and is a vertical plate-like structure.

3. The blade-type demisting module according to claim 1, characterized in that: The first blade comprises, The first air guide portion extends downward in a direction parallel to the airflow and forms a tip; A first arc segment connected to the first guide portion and extending upward, wherein the first arc segment bends toward the second blade; a second arc segment connected to the first arc segment and extending upward, wherein the bending angle of the second arc segment is opposite to that of the first arc segment; The first bending structure is connected to the second arc segment and bends toward the second blade. The end of the first bending structure forms a tip and points to the second blade.

4. A blade type demisting module according to claim 3, characterized in that: The second blade comprises, A second guide portion, the second guide portion extends downward along the same angle as the second arc segment and forms a tip; A second bending structure is connected to the second guide portion and is bent in a direction opposite to the first bending structure; An extension portion connected to the second bending structure guides the airflow to flow toward the third blade and forms a tip pointing to the third blade.

5. The blade-type demisting module according to claim 1, characterized in that: The first blade, the second blade and the third blade are arc-shaped blade structures.

6. The blade type demisting module according to claim 5, characterized in that: The lower end of the first blade and the upper end of the third blade respectively extend a certain length in the vertical direction to form an extended structure.

7. The blade-type demisting module according to claim 6, characterized in that: The middle portion of the third blade is also provided with a downwardly protruding sharp corner, and the sharp corner is located at the starting end of the extension structure.

8. A demister equipped with a blade-type demister module according to any one of claims 1 to 7, wherein the demister is formed by splicing a plurality of blade-type demister modules.

9. A demister according to claim 8, characterized in that: The demister is a flat plate demister, a ridge type demister and a horizontal flue demister.

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