Baffling blade and steam-water separator

Abstract

The utility model discloses a baffling blade which comprises a baffling blade body, the baffling blade body is in a bending shape, the baffling blade body comprises at least one bending part which is subjected to fairing treatment, the inner wall of the baffling blade body comprises a plurality of bulges which extend towards the inner side, and the bulges are arranged in an array. The utility model further discloses a steam-water separator. The steam-water separator has the beneficial effects that the thickness of a liquid film on the surface of the blade is effectively inhibited, the separation efficiency of the steam-water separator is improved, and meanwhile, the pressure loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of separation and filtration, in particular to a baffle blade and a steam-water separator for filtration. Background Art

[0002] In traditional baffle-vane steam-water separators, the separation of droplets in the gas-liquid phase mainly relies on the baffle blades to intercept and adsorb the droplets, and then drain the liquid through the hydrophobic part. A steam-water separator with excellent performance needs to have the highest possible separation efficiency and the smallest possible pressure loss.

[0003] The phenomenon of secondary entrainment refers to the fact that the droplets intercepted by the blades will form a liquid film of varying thickness on the surface of the blades. When the wind speed increases, the droplets that have been intercepted on the blades are not discharged by the hydrophobic method as expected, but will be carried away again, thus affecting the separation efficiency. Therefore, it is necessary to avoid the phenomenon of secondary entrainment, that is, to avoid the formation of liquid film or reduce the thickness of the liquid film.

[0004] Another criterion for judging the quality of steam-water separators is pressure loss. The smaller the pressure loss caused by the structure and layout, the better. Therefore, it is also important to avoid unnecessary pressure loss by improving the layout and structure.

[0005] Existing steam-water separators produce thick liquid films due to unreasonable structures or arrangements, which leads to secondary entrainment, low separation efficiency and high pressure loss.

[0006] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to ordinary technicians in this field. Utility Model Content

[0007] The technical problem to be solved by the utility model is: how to solve the problem of low separation efficiency caused by secondary entrainment phenomenon in the baffle blades of the current steam-water separator.

[0008] The utility model solves the above technical problems through the following technical means:

[0009] The deflector blade comprises a deflector blade body, which is in a bent shape and includes at least one smoothed bent portion. The inner wall of the deflector blade body comprises a plurality of protrusions extending inwardly, and the protrusions are arranged in an array.

[0010] The utility model forms a bending part by smoothing the inner side of the bending part, so that the streamline will not be disordered and large-scale eddy current will not be generated; the utility model also arranges protrusions on the deflecting blade body, which can effectively suppress the liquid film thickness on the blade surface, improve the separation efficiency of the steam-water separator, reduce pressure loss and improve economic benefits.

[0011] Preferably, the deflector blade body includes at least one bend, and the angle of the bend is 60°-120°.

[0012] Preferably, the protrusion is in a comb-shaped structure, a sawtooth-shaped structure, an arc-shaped structure, or a combination thereof.

[0013] Preferably, the height of the protrusion is 1-4 mm.

[0014] Preferably, the width of the protrusion is 1-3 mm.

[0015] Preferably, the bending point of the deflector blade body is located in the middle of the deflector blade body, and the bending line is a straight line, a curve, or a combination thereof.

[0016] The utility model also discloses a steam-water separator, comprising the above-mentioned baffle blades and a cylinder, wherein the baffle blades are evenly connected inside the cylinder, the baffle blades are arranged in the same direction, and the baffle blade openings face the liquid outlet of the cylinder.

[0017] Preferably, the cylinder comprises a mounting plate, the mounting plate is welded inside the cylinder, and the deflector blades are connected to the mounting plate at even intervals.

[0018] Preferably, the cylinder also includes a spoiler, the spoiler is connected to the mounting plate, and the spoiler is located below the deflector blade.

[0019] The advantages of the utility model are:

[0020] The utility model forms a bending part by smoothing the inner side of the bending part, so that the streamline will not be disordered and large-scale eddy current will not be generated; the utility model also arranges protrusions on the deflecting blade body, which can effectively suppress the liquid film thickness on the blade surface, improve the separation efficiency of the steam-water separator, reduce pressure loss and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the baffle blade of the utility model embodiment;

[0022] Figure 2 It is a schematic structural diagram of the comb-shaped protrusion in the first embodiment of the utility model;

[0023] Figure 3It is a simulation diagram of the liquid film thickness of the deflector blades without protrusions and with protrusions in the embodiment of the utility model;

[0024] Figure 4 It is a simulation diagram of the liquid film thickness of the steam-water separator without protrusion and with protrusion in the embodiment of the utility model;

[0025] Figure 5 It is the internal flow field streamline diagram obtained by simulation test of the embodiment of the utility model;

[0026] Figure 6 It is an internal flow field vortex diagram obtained by simulation test of the embodiment of the utility model;

[0027] Figure 7 It is a schematic diagram of the structure of the protrusion in the second embodiment of the utility model;

[0028] Figure 8 It is a schematic diagram of the structure of the protrusion in the third embodiment of the utility model;

[0029] Fig. 9 It is a structural schematic diagram of a steam-water separator according to an embodiment of the utility model;

[0030] Fig.10 It is a structural schematic diagram of a steam-water separator in an embodiment of the utility model;

[0031] Numbers in the figure:

[0032] 1. deflector blade; 11. deflector blade body; 12. protrusion; 2. cylinder body; 3. mounting plate; 4. spoiler. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Embodiment 1:

[0035] like Figure 1 As shown, the deflector blade 1 includes a deflector blade body 11, which is in a bent shape. The deflector blade body 11 includes at least one smoothed bending portion, and the inner side of the deflector blade body 11 includes a plurality of protrusions 12 extending inwardly, and the protrusions 12 are arranged in an array.

[0036] It should be noted that after the deflector blade body 11 is bent, a straight line is formed at the bend, but in the case of a straight line, the vortex will be very large and the streamlines will be disordered. Therefore, after the simulation test, the fold line will be smoothed. Smoothing means that local vortices are generated at this place because the structure is not smooth enough. By observing the streamlines, operations such as filling and deleting are performed on this part of the structure. For example, by simulating the flow field at a corner with an angle of 90 degrees, it can be found that there must be a large vortex and disordered streamlines. At this time, for example, if the corner is rounded, the streamline will become smooth. Therefore, the bending portion is rounded in this embodiment, but it can also be arc-shaped or wavy.

[0037] The protrusion 12 is a comb-shaped structure, such as Figure 2 As shown, the height H of the protrusion 12 is 1-4 mm, preferably 1-2 mm, and the width L of the protrusion 12 is preferably 1-2 mm. The comb-shaped protrusions 12 are strip-shaped, and there are gaps between the strip-shaped protrusions 12.

[0038] In the optimization process of the baffle blade 1, the inventor first determined the prototype steam-water separator and the size of the internal baffle blades that need to be improved based on actual measurements, especially focusing on the shape, size and arrangement position of the baffle blades; then simulated the internal flow field through simulation, optimized the structure according to the flow field cloud map, added protrusions 12 to the thick liquid film part to destroy the liquid film, avoid secondary entrainment, and made structural adjustments to the places where eddies are easily generated, such as around the bend of the baffle blade, to change the angle, avoid the separation efficiency affected by the generated eddies, and improve the separation efficiency; the custom optimization function K = separation efficiency η / pressure drop P, the larger the K value, the better the performance of the steam-water separator, and the parameter combination with the largest K value is selected as the optimal structure. Finally, the optimized channel flow field is verified by experiments for eddies, secondary entrainment and turbulence intensity, and the optimized modified structure is determined.

[0039] The present invention aims at the problems of low separation efficiency and high pressure loss in the steam-water separator, takes the target working condition as the premise, suppresses the secondary entrainment that is easy to occur on the baffle blades and optimizes the structure and arrangement of the baffle blades, obtains the best parameter combination suitable for the working condition, and ensures high separation efficiency and low pressure loss. Based on this method, the steam-water separation blade is structurally optimized and designed, which can effectively suppress the liquid film thickness on the blade surface, improve the separation efficiency of the steam-water separator, reduce pressure loss, and improve economic benefits.

[0040] The specific process can be:

[0041] (1) Identify and extract the three-dimensional model of the flow channel, and obtain the location of the local thick liquid film and the location of the large-scale eddy current that has a greater impact on the pressure drop through experimental simulation;

[0042] (2) adding a protrusion 12 to the location where a thick liquid film is generated locally on the blade, and locally smoothing the area where a large-scale vortex is generated;

[0043] (3) Conduct a secondary experimental simulation on the channel flow domain after adding the protrusion 12 and smoothing to regain the flow field distribution;

[0044] (4) Compare the flow field channels before and after optimization, and compare the changes in separation efficiency and pressure drop values. Customize the optimization function K = separation efficiency η / pressure drop P. The larger the K value, the better the performance of the steam-water separator.

[0045] (5) Repeat steps 1 to 4 to achieve iterative optimization, and finally select the solution with the largest K value as the optimal structure.

[0046] like Figure 3 As shown, it is a schematic diagram of the change of liquid film thickness under the simulation test of an ordinary deflector blade (that is, a deflector blade without protrusions 12) and a deflector blade with protrusions 12, as shown in FIG. Figure 4 , which is a schematic diagram of the change in liquid film thickness under simulation tests of an existing steam-water separator and the steam-water separator in this embodiment. Figure 3 and Figure 4 In the simulation test, the parameters such as shape, thickness, bending angle, etc. of the deflector blades 1 are the same, and the only difference is whether there is a protrusion 12. Figure 3 It can be shown that the darkest red represents the largest liquid film thickness, and the darkest blue represents the smallest liquid film thickness, that is, when the transition from blue to red occurs, the liquid film thickness changes from small to large. As can be seen from the figure, the existing baffle blades on the left have more red areas, indicating that the liquid film thickness of the existing baffle blades on the left is greater than that of the baffle blades 1 with protrusions on the right, and the liquid film thickness decreases after the protrusions 12 are added, indicating that the addition of protrusions 12 can destroy the liquid film and reduce the secondary entrainment phenomenon.

[0047] In this embodiment, the deflector blade body 11 includes at least one bend, and the angle of the bend is 60°-120°. The bend of the deflector blade body 11 is located in the middle of the deflector blade body 11, and the bend line is a straight line, a curve, or a combination thereof. In this embodiment, the deflector blade body 11 is a roughly rectangular plate and is bent in the middle. Of course, the deflector blade 1 can also include two bends to form a serrated or corrugated structure.

[0048] like Figure 5 As shown in the figure, the air flow velocity at different bending angles, from left to right, the angles are 60°, 100°, and 140° respectively. Figure 5As shown, when the spacing between baffles 1 is the same, the darkest red represents the maximum flow rate, and the darkest blue represents the minimum flow rate, that is, when the blue transitions to red, the airflow velocity changes from small to large. From the figure, the larger the angle, the larger the blue area, indicating that the faster the airflow speed, at this time, the worse the separation performance (this does not mean that the overall performance is worse, because the pressure loss will be smaller in this case).

[0049] like Figure 6 As shown in the figure, the eddy currents under different bending angles are 60°, 100°, and 140° from left to right. Figure 6 As shown, when the spacing between baffles 1 is the same, the darkest red represents a serious vortex situation, and the darkest blue represents a weakest vortex situation, that is, when the blue transitions to the red, the vortex situation gradually becomes more serious. Figure 6 , the larger the angle, the smaller the blue area, the smaller the vortex generated, and it is less likely to produce droplet entrainment, which is beneficial to separation.

[0050] It can be seen that the angle affects both separation efficiency and pressure loss. The higher the separation efficiency, the greater the pressure loss. These two indicators are contradictory, so the custom K is used to find a balance point and make a comprehensive evaluation. If the main purpose is to achieve good separation, then an infinitely small angle is the best. It can be roughly understood as blocking this section, but the pressure drop will be particularly large, which is meaningless. Taking all factors into consideration, the angle of the bend should be 60°-120°.

[0051] In this embodiment, the inner side of the bend is smoothed to prevent the streamlines from being disordered and large-scale eddies from being generated.

[0052] This embodiment also provides a protrusion 12 on the deflector blade body 11, which can effectively suppress the thickness of the liquid film on the blade surface, improve the separation efficiency of the steam-water separator, and reduce pressure loss and improve economic benefits.

[0053] Embodiment 2:

[0054] like Figure 7 As shown, the present embodiment is different from the first embodiment in that the structure of the protrusion 12 is different.

[0055] In this embodiment, the structure of the protrusion 12 is a sawtooth structure, the width of the protrusion 12 is 1-3 mm, preferably 2-3 mm, and the top angle α is preferably 45°-60°.

[0056] Embodiment three:

[0057] like Figure 8 As shown, this embodiment is different from the first embodiment in that the structure of the protrusion 12 is different.

[0058] In this embodiment, the structure of the protrusion 12 is an arc-shaped structure, and the width of the protrusion 12 is 1-3 mm, preferably 1-2 mm. In this case, there may be no gap between adjacent protrusions 12.

[0059] Embodiment 4:

[0060] like Fig. 9 , Fig.10 As shown, the utility model also discloses a steam-water separator, comprising the above-mentioned deflector blades 1 and a cylinder 2, wherein the deflector blades 1 are evenly connected inside the cylinder 2, the deflector blades 1 are arranged in the same direction, and the openings of the deflector blades 1 face the liquid outlet of the cylinder 2.

[0061] The cylinder 2 includes a mounting plate 3, which is welded inside the cylinder 2, and the deflector blades 1 are evenly spaced and connected to the mounting plate 3. The cylinder 2 also includes a spoiler 4, which is connected to the mounting plate 3 and is located below the deflector blades 1.

[0062] The left and right sides of the cylinder 2 are gas-liquid mixed fluids, which will be disturbed after passing through the spoiler 4. After the gas flows through multiple deflector blades 1, the blocked liquid can flow downward along the deflector blades 1 and flow out from the liquid outlet, while the gas flows out from the top outlet, realizing gas-liquid diversion.

[0063] 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 aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A deflector blade, characterized in that: It comprises a deflector blade body, which is in a bent shape. The deflector blade body comprises at least one smoothed bent portion. The inner wall of the deflector blade body comprises a plurality of protrusions extending inwardly, and the protrusions are arranged in an array.

2. The deflector blade according to claim 1, characterized in that: The deflector blade body includes at least one bend, and the angle of the bend is 60°-120°.

3. The deflector blade according to claim 1, characterized in that: The protrusions are in a comb-shaped structure, a sawtooth-shaped structure, an arc-shaped structure, or a combination thereof.

4. The deflector blade according to claim 1, characterized in that: The height of the protrusion is 1-4 mm.

5. The deflector blade according to claim 1, characterized in that: The width of the protrusion is 1-3 mm.

6. The deflector blade according to claim 1, characterized in that: The bending point of the deflector blade body is located in the middle of the deflector blade body, and the bending line is a straight line, a curve, or a combination thereof.

7. A steam-water separator, characterized in that: It comprises the deflecting blades and a cylinder according to any one of claims 1 to 4, wherein the deflecting blades are evenly connected inside the cylinder, the deflecting blades are arranged in the same direction, and the openings of the deflecting blades face the liquid outlet of the cylinder.

8. The steam-water separator according to claim 7, characterized in that: The cylinder body comprises a mounting plate, the mounting plate is welded inside the cylinder body, and the deflector blades are connected to the mounting plate at even intervals.

9. The steam-water separator according to claim 8, characterized in that: The cylinder also includes a spoiler connected to the mounting plate and located below the deflector blade.

Images