A pipeline type gas demister and dehydrator

Abstract

The present application discloses a pipeline type gas demister and dehydrator, which comprises a housing. A concave-convex plate is arranged vertically in the housing, and a demisting plate group is arranged on both sides of the concave-convex plate; Each demisting plate group comprises a plurality of demisting plates arranged at intervals in the vertical direction. Each demisting plate comprises a first vertical plate, an inclined plate and a second vertical plate connected together in the vertical direction. The first vertical plate is located on the side of the inclined plate facing the air inlet end. The inclined plate extends obliquely downward along the direction from the air inlet end to the air outlet end. The upper end of the inclined plate is connected to the lower end of the first vertical plate, and the lower end of the inclined plate is connected to the upper end of the second vertical plate; Two adjacent demisting plates partially overlap; The concave-convex plate comprises a first web and a second web arranged at intervals and staggered. The adjacent first web and second web are connected by an arm plate, and air holes are formed in each arm plate. By using the present application, the demisting rate of the mist in the gas can reach more than 94%.

Description

Technical Field

[0001] The present invention relates to a pipeline type gas demister and dehydrator. Background Art

[0002] In order to remove the fog and droplets carried in the gas, a demister is generally used. In the prior art, different demisters are designed according to the different components of the fog carried in the gas. However, these demisters are mainly vertical, and the gas passes through the demister from bottom to top. Part of the liquid intercepted by the demister will enter the gas again and be carried into the next process, reducing the demisting effect. Summary of the Invention

[0003] To solve the above problems, the present invention provides a pipeline type gas demister and dehydrator, which includes a housing extending along a first axis direction. The two ends of the housing are respectively formed as an air inlet end and an air outlet end. A concave-convex plate is arranged vertically in the housing, and a demisting plate group is respectively arranged at intervals on both sides of the concave-convex plate in the first axis direction. A drain pipe is arranged on the lower side of the housing.

[0004] Each demisting plate group includes a plurality of demisting plates arranged at intervals vertically. Each demisting plate includes a first vertical plate, an inclined plate and a second vertical plate connected in sequence vertically. In the first axis direction, the first vertical plate is located on the side of the inclined plate facing the air inlet end, and the second vertical plate is located on the side of the inclined plate facing the air outlet end. The inclined plate extends obliquely downward along the direction from the air inlet end to the air outlet end. The upper end of the inclined plate is connected to the lower end of the first vertical plate, and the lower end of the inclined plate is connected to the upper end of the second vertical plate. When observed along the first axis direction, two adjacent demisting plates partially overlap.

[0005] The concave-convex plate includes a first web plate and a second web plate arranged at intervals along a second axis direction and staggered in the first axis direction. The first web plate and the second web plate are both perpendicular to the first axis direction and extend vertically. The adjacent first web plate and second web plate are connected by an arm plate. The arm plate is inclined relative to the first axis direction and extends vertically. The inclination directions of two adjacent arm plates are opposite. A through hole is formed on each arm plate, and the central axis of the through hole is perpendicular to the extension direction of the arm plate where it is located. The first axis direction and the second axis direction both extend horizontally and are perpendicular to each other. In the present application, the cross-section of the housing perpendicular to the first axis direction is preferably rectangular.

[0006] When the present application is in operation, the gas containing fog and foam enters the housing through the air inlet end and flows upward. When the gas passes through the demisting plate group, the concave-convex plate and the demisting plate group in sequence, the fog and foam in the gas are adsorbed on the surfaces of the demisting plates and the concave-convex plate and gradually converge into droplets. When the weight of the droplets exceeds the resultant force of the buoyancy and surface tension of the gas, the droplets drip from the demisting plates and the concave-convex plate to the bottom of the housing and are discharged through the drain pipe.

[0007] When the gas enters the gap between two adjacent demisting plates, the mist in the gas impacts the lower surface of the demisting plate due to inertia. At the same time, due to the blocking effect of the inclined plate, a swirling flow is generated in the gas within the gap, and some of the mist can adhere to the upper surface of the demisting plate. As time goes by, the amount of liquid adsorbed on the demisting plate gradually increases and converges into large droplets, which drip downward. Since the gap between two adjacent demisting plates extends obliquely downward along the gas flow direction, the gas flow within the gap has a downward component force, which is more conducive to the downward dripping of the droplets.

[0008] When the gas flow passes through the first demisting plate group, the gas continues to flow in the direction of the concave-convex plate. When the gas with some mist removed passes through the through-holes on the concave-convex plate, since the arm plate is inclined with respect to the first axis direction and the central axis of the through-hole is perpendicular to the extension direction of the arm plate, the gas needs to bend before passing through the concave-convex plate, which can effectively increase the collision probability between the mist and the concave-convex plate and improve the removal rate of the mist. After passing through the concave-convex plate, the gas continues to pass through another demisting plate group, so that the mist in the gas is basically completely removed. With the present application, when the gas flow velocity is 2.5 - 5 m / s, the removal rate of the mist in the gas can reach more than 94%.

[0009] Specifically, to prevent the gas flow from directly passing through the concave-convex plate and reducing the dehydration rate, no through-holes are provided on the first web and the second web. That is, no holes are opened on the first web and the second web.

[0010] Specifically, the angle between the inclined plate and the horizontal plane is 40 - 50°. Under this design, a strong swirling flow can be formed in the gas between two adjacent demisting plates, effectively increasing the collision rate between the mist carried in the gas flow and the demisting plate, so that more mist particles adhere to the demisting plate, improving the dehydration efficiency. And it makes the gas flow generate approximately the same component forces in the vertical and horizontal directions, avoiding excessive flow resistance of the gas and resulting in too high power consumption for transporting the gas.

[0011] Specifically, the angle between the first web and the arm plate is 98 - 105°. This design enables the mist in the gas flow to impact the first web and the second web and flow downward along the first web and the second web to the bottom of the housing.

[0012] Further, the inclined plate is connected to the second vertical plate through a bending portion, which includes a straight plate segment and an inclined plate segment connected together. The straight plate segment extends downward vertically from the lower end of the inclined plate, and the inclined plate segment extends downward and obliquely toward the exhaust end from the lower end of the straight plate segment. The lower end of the inclined plate segment is connected to the upper end of the second vertical plate, and liquid outlet holes are provided on the straight plate segment. A dehydrating plate is provided on the upper side of each bending portion, which extends downward and obliquely toward the exhaust end from the lower end of the inclined plate, and a liquid collection area is formed between the dehydrating plate and the bending portion. When the liquid droplets adhered to the lower surface of the demisting plate reach the straight plate segment of the bending portion, they can enter the liquid collection area through the liquid outlet holes under the impetus of inertia. Since the flow area of the liquid collection area is enlarged, the gas flow velocity entering the liquid collection area is reduced, and the carrying effect on the liquid droplets is reduced, making it easier for the liquid droplets to drip downward and converge into larger liquid droplets, and finally dripping to the bottom of the housing. With this design, when the air flow velocity is 2.5 - 5 m / s, the demisting rate of the mist in the gas reaches over 99.6%.

[0013] Further, the included angle between the dehydrating plate and the horizontal plane is smaller than the included angle between the inclined plate and the horizontal plane, and dehydrating holes are provided on the dehydrating plate. Specifically, the included angle between the dehydrating plate and the horizontal plane is 20 - 30° smaller than the included angle between the inclined plate and the horizontal plane.

[0014] When the liquid droplets adhered to the upper surface of the demisting plate reach the dehydrating plate, they can enter the liquid collection area through the dehydrating holes under the impetus of inertia and converge. The lower wind speed in the liquid collection area is more conducive to the sedimentation of the liquid droplets.

[0015] Further, to reduce the resistance of gas flow, in the first axis direction, the first length of the bending portion is 20 - 30% of the second length of the demisting plate.

[0016] Further, to ensure that a gap extending downward in the inclined direction is formed between adjacent demisting plates, so as to ensure that the mist in the gas can impact the demisting plates to the greatest extent. When observed along the first axis direction, among adjacent two demisting plates, the lower end of the second vertical plate of the demisting plate located on the upper side extends downward beyond the lower end of the first vertical plate of the demisting plate located on the lower side.

[0017] Further, in the first axis direction, the net distance between the concavo-convex plate and the demisting plate group is 3.5 - 6 times the thickness of the demisting plate group. This design can make the air flow passing through the demisting plate group fully mixed, homogenize the mist therein, and is conducive to improving the trapping efficiency of the concavo-convex plate for the mist. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an embodiment of the present invention.

[0019] Figure 2 is Figure 1View in the direction of A-A in the [object].

[0020] Figure 3 is Figure 1 An enlarged view of part B in the [object].

[0021] Figure 4 is Figure 2 An enlarged view of part C in the [object].

[0022] Figure 5 It is a schematic structural view of another embodiment of the present invention.

[0023] Figure 6 is Figure 5 An enlarged view of part D in the [object].

[0024] Figure 7 It is an enlarged view of the second demisting plate. Detailed implementation manners

[0025] In the drawings, the direction of the first axis X indicates the first axis direction, the direction of the second axis Y indicates the second axis direction, the direction of the third axis Z indicates the vertical direction, and both the first axis direction and the second axis direction extend along the horizontal direction and are perpendicular to each other.

[0026] Embodiment 1

[0027] Please refer to Figures 1-4 , a first pipeline type gas demisting and dehydrating device, which includes a housing 10 extending along the first axis direction. The housing 10 includes a cylinder 11 extending along the first axis direction. The cross-section of the cylinder 11 perpendicular to the first axis direction is rectangular. At both ends of the cylinder 11 in the first axis direction, a first tapered pipe 12 and a second tapered pipe 13 are respectively installed. The small ends of the first tapered pipe 12 and the second tapered pipe 13 both extend along the first axis direction and away from the cylinder. An air inlet end 14 is installed at the small end of the first tapered pipe 12, and the inner cavity of the air inlet end forms an air inlet 141. An exhaust end 15 is installed at the small end of the second tapered pipe 13, and the inner cavity of the exhaust end forms an exhaust port 151. That is, both ends of the housing respectively form an air inlet end and an exhaust end.

[0028] A concavo-convex plate 30 is arranged vertically in the cylinder 11. A first demisting plate group is respectively arranged at intervals on both sides of the concavo-convex plate in the first axis direction. The two first demisting plate groups are respectively called the first demisting plate group A201 and the first demisting plate group B202. Among them, the first demisting plate group A201 is located on the side of the concavo-convex plate 30 facing the air inlet end 14, and the first demisting plate group B202 is located on the side of the concavo-convex plate 30 facing the exhaust end 15.

[0029] A drain pipe 16 is provided on the lower side of the cylinder body. In the first axis direction, the drain pipe 16 is located between the first demisting plate group A201 and the concave-convex plate 30, and a drain valve 17 is installed on the drain pipe 16. This drain pipe is used to connect to the waste water collection pipeline.

[0030] The structures of the first demisting plate group A201 and the first demisting plate group B202 are the same. Hereinafter, the specific structure of the first demisting plate group will be described by taking the first demisting plate group A201 as an example.

[0031] The first demisting plate group A201 includes a plurality of first demisting plates 21 arranged at intervals in the vertical direction. Each first demisting plate 21 includes a first vertical plate A22, an inclined plate A23, and a second vertical plate A24 that are sequentially connected together in the vertical direction.

[0032] In the first axis direction, the first vertical plate A22 is located on the side of the inclined plate A23 facing the air inlet end 14, and the second vertical plate A24 is located on the side of the inclined plate A23 facing the air outlet end 15. The inclined plate A23 extends obliquely downward in the direction from the air inlet end to the air outlet end. The upper end of the inclined plate A is connected to the lower end of the first vertical plate A, and the lower end of the inclined plate A is connected to the upper end of the second vertical plate A. In this embodiment, the first angle α between the inclined plate A23 and the horizontal plane is 45°. It can be understood that in other embodiments, the first angle α can also be 40°, 42°, 46°, 48°, or 50°, or other angles between 40 - 50°.

[0033] When observed along the first axis direction, two adjacent first demisting plates partially overlap. Specifically, in this embodiment, when observed along the first axis direction, among two adjacent first demisting plates, the lower end of the second vertical plate A of the first demisting plate located on the upper side extends downward beyond the lower end of the first vertical plate A of the first demisting plate located on the lower side.

[0034] The concave-convex plate 30 includes a first web 31 and a second web 32 that are arranged at intervals in the second axis direction and staggered in the first axis direction. The first web 31 is located on the side of the second web 32 facing the air outlet end. The first web 31 and the second web 32 are both perpendicular to the first axis direction and extend in the vertical direction. Adjacent first webs and second webs are connected by an arm plate 33. The arm plate is inclined with respect to the first axis direction and extends in the vertical direction. The inclination directions of two adjacent arm plates are opposite. A through hole 331 in the shape of a through hole is formed in each arm plate. The central axis of this through hole is perpendicular to the extension direction of the arm plate where it is located. A first groove 311 extending in the vertical direction is formed between each first web 31 and two adjacent arm plates, and a second groove 321 extending in the vertical direction is formed between each second web 32 and two adjacent arm plates.

[0035] In this embodiment, the second included angle β between the first web 31 and the arm plate 33 is 101°. It can be understood that in other embodiments, the second included angle β can also be 98°, 100°, 102° or 105°, or other angles between 98° and 105°. No holes including air vents are provided on either the first web or the second web.

[0036] In this embodiment, in the first axis direction, the net distance L between the concave-convex plate 30 and the first demisting plate group A201 is 4 times the thickness H of the first demisting plate group A201, and the net distance between the concave-convex plate 30 and the first demisting plate group B202 is also 4 times the thickness of the first demisting plate group B202.

[0037] When this embodiment is working, the gas containing mist enters the housing 10 through the air inlet 141. When the gas passes through the first demisting plate group A, the concave-convex plate, and the first demisting plate group B in sequence, the mist in the gas is adsorbed on the surfaces of the first demisting plate and the concave-convex plate and gradually converges into droplets. When the weight of the droplets exceeds the resultant force of the buoyancy and surface tension of the gas, the droplets drip from the first demisting plate and the concave-convex plate to the bottom of the housing and are discharged through the drain pipe.

[0038] When the gas enters the gap 211 between two adjacent first demisting plates of the first demisting plate group A201, the mist in the gas impacts the lower surface of the first demisting plate due to inertia. At the same time, due to the blocking effect of the inclined plate A, a swirling flow is generated in the gas in the gap 211, and some of the mist in the gas can adhere to the upper surface of the first demisting plate. As time goes by, the liquid adsorbed on the first demisting plate gradually increases and converges into large droplets, which drip downward. Since the gap between two adjacent first demisting plates extends obliquely downward along the gas flow direction, the gas flow in the gap has a downward component force, making it easier for the droplets to drip downward.

[0039] When the gas with some of the mist removed passes through the air vents on the concave-convex plate, since the central axis of the air vents is perpendicular to the extension direction of the arm plate, the gas needs to turn before passing through the concave-convex plate, which can effectively increase the collision probability between the mist and the concave-convex plate and improve the demisting rate of the mist. After passing through the concave-convex plate, the gas continues to pass through the first demisting plate group B202. Using this embodiment, when the gas flow velocity is between 3.4 and 3.8 m / s, the demisting rate of the mist in the gas can reach more than 94%.

[0040] Embodiment 2

[0041] Please refer to Figures 5-7 , this embodiment is an improvement based on Embodiment 1. Figures 5-7 In Figures 1-4 , the same reference numerals represent the same structural components.

[0042] The second pipeline type gas demister and dehydrator includes a housing 10 extending along the first axis direction. The housing in this embodiment is the same as the housing in Embodiment 1. Inside the cylinder body 11 of the housing 10, a concave-convex plate 30 is arranged vertically. On both sides of the concave-convex plate in the first axis direction, a second demisting plate group is arranged at intervals respectively. The two second demisting plate groups are respectively called the second demisting plate group A 401 and the second demisting plate group B 402. Among them, the second demisting plate group A 401 is located on the side of the concave-convex plate 30 facing the air inlet end 14, and the second demisting plate group B 402 is located on the side of the concave-convex plate 30 facing the exhaust end 15.

[0043] The concave-convex plate in this embodiment has the same structure as the concave-convex plate in Embodiment 1. In this embodiment, the second demisting plate group A 401 and the second demisting plate group B 402 have the same structure. The following takes the second demisting plate group A 401 as an example to illustrate the specific structure of the second demisting plate group.

[0044] The second demisting plate group A 401 includes a plurality of second demisting plates 41 arranged vertically at intervals. Each second demisting plate 41 includes a first vertical plate B 42, an inclined plate B 43, a bending part 45 and a second vertical plate B 44 connected together in sequence vertically.

[0045] In the first axis direction, the first vertical plate B 42 is located on the side of the inclined plate B 43 facing the air inlet end, the bending part 45 is located on the side of the inclined plate B 43 facing the exhaust end, and the second vertical plate B 44 is located on the side of the bending part 45 facing the exhaust end. The inclined plate B 43 extends obliquely downward along the direction from the air inlet end to the exhaust end. The upper end of the inclined plate B is connected to the lower end of the first vertical plate B, the lower end of the inclined plate B is connected to the upper end of the bending part 45, and the lower end of the bending part is connected to the upper end of the second vertical plate B. That is, the inclined plate is connected to the second vertical plate through a bending part.

[0046] The bending part 45 includes a straight plate segment 451 and an inclined plate segment 452 connected together. Among them, the straight plate segment 451 is formed by the lower end of the inclined plate B 43 extending vertically downward, and the inclined plate segment 452 extends obliquely downward from the lower end of the straight plate segment 451 in the direction of the exhaust end. The lower end of the inclined plate segment 452 is connected to the upper end of the second vertical plate B 44. A liquid outlet hole 453 is opened on the straight plate segment 451.

[0047] In this embodiment, the third included angle γ between the inclined plate B 43 and the horizontal plane is 45°. It can be understood that in other embodiments, the third included angle γ can also be 40°, 42°, 46°, 48° or 50°, or other angles between 40 - 50°.

[0048] When observed along the first axis direction, two adjacent second demisting plates partially overlap. Specifically, in this embodiment, when observed along the first axis direction, among two adjacent second demisting plates, the lower end of the second vertical plate B of the upper second demisting plate extends downward beyond the lower end of the first vertical plate B of the lower second demisting plate.

[0049] In this embodiment, a dehydrating plate 431 is disposed above each bending portion 45. The dehydrating plate extends obliquely downward from the lower end of the inclined plate B43 toward the exhaust end. A dehydrating hole 432 is formed in the dehydrating plate 431, and a liquid collection area 433 is formed between the dehydrating plate and the bending portion.

[0050] The fourth included angle θ between the dehydrating plate and the horizontal plane is smaller than the third included angle γ between the inclined plate B and the horizontal plane. Specifically, in this embodiment, the fourth included angle θ is 20°, that is, the fourth included angle θ is smaller than the third included angle γ by 25°. It can be understood that in other embodiments, the fourth included angle θ can also be 20°, 22°, 27° or 30° smaller than the third included angle γ, or other angles between 20° and 30°.

[0051] In this embodiment, in the first axis direction, the first length S of the bending portion 45 is 26% of the second length W of the second demisting plate. For the content not specifically described in this embodiment, reference can be made to Embodiment 1.

[0052] Since the bending portion and the dehydrating plate are added in this embodiment, when the gas entering between two adjacent second demisting plates reaches the straight plate section 451, due to inertia, the liquid droplets adhered to the lower surface of the second demisting plate will enter the liquid collection area 433 through the liquid outlet hole 453, and the liquid droplets adhered to the upper surface of the second demisting plate will enter the liquid collection area 433 through the dehydrating hole 432. Since the flow area of the liquid collection area is enlarged, the gas flow velocity entering the liquid collection area is reduced, and the carrying effect on the liquid droplets is reduced, making the liquid droplets more likely to drip downward and converge into larger liquid droplets, and finally dripping to the bottom of the housing. By adopting this embodiment, when the gas flow velocity is between 3.4 - 3.8 m / s, the demisting rate of the mist in the gas can reach more than 99.6%.

Claims

1. A pipeline type gas demisting and dehydrating device, characterized in that, it includes a housing extending along the first axis direction, and both ends of the housing are respectively formed as an air inlet end and an exhaust end; a concave-convex plate is arranged vertically in the housing, and a demisting plate group is respectively arranged at intervals on both sides of the concave-convex plate in the first axis direction, and a drain pipe is arranged on the lower side of the housing; Each demisting plate group includes a plurality of demisting plates arranged at intervals vertically, and each demisting plate includes a first vertical plate, an inclined plate and a second vertical plate sequentially connected together vertically. In the first axis direction, the first vertical plate is located on the side of the inclined plate facing the air inlet end, and the second vertical plate is located on the side of the inclined plate facing the exhaust end; the inclined plate extends obliquely downward along the direction from the air inlet end to the exhaust end, the upper end of the inclined plate is connected to the lower end of the first vertical plate, and the lower end of the inclined plate is connected to the upper end of the second vertical plate; when observed along the first axis direction, adjacent two demisting plates partially overlap; The inclined plate is connected to the second vertical plate through a bending part, and the bending part includes a straight plate section and an inclined plate section connected together. The straight plate section extends vertically downward from the lower end of the inclined plate, and the inclined plate section extends obliquely downward from the lower end of the straight plate section towards the exhaust end direction, and the lower end of the inclined plate section is connected to the upper end of the second vertical plate. Liquid outlet holes are formed in the straight plate section; a dehydrating plate is arranged on the upper side of each bending part, and the dehydrating plate extends obliquely downward from the lower end of the inclined plate towards the exhaust end direction, and a liquid collection area is formed between the dehydrating plate and the bending part; The concave-convex plate includes a first web plate and a second web plate arranged at intervals along the second axis direction and arranged alternately along the first axis direction. The first web plate and the second web plate are both perpendicular to the first axis direction and extend vertically. Adjacent first web plate and second web plate are connected by an arm plate. The arm plate is arranged obliquely with respect to the first axis direction and extends vertically; the inclination directions of adjacent two arm plates are opposite, and air passing holes are formed in each arm plate, and the central axis of the air passing hole is perpendicular to the extending direction of the arm plate where it is located; both the first axis direction and the second axis direction extend horizontally and are perpendicular to each other.

2. The pipeline type gas demisting and dehydrating device according to claim 1, characterized in that, no air passing holes are arranged on both the first web plate and the second web plate.

3. The pipeline type gas demisting and dehydrating device according to claim 1, characterized in that, the included angle between the inclined plate and the horizontal plane is 40 - 50°.

4. The pipeline type gas demisting and dehydrating device according to claim 1, characterized in that, the included angle between the first web plate and the arm plate is 98 - 105°.

5. The pipeline type gas demisting and dehydrating device according to claim 1, characterized in that, the included angle between the dehydrating plate and the horizontal plane is smaller than the included angle between the inclined plate and the horizontal plane, and dehydrating holes are formed in the dehydrating plate.

6. The pipeline type gas demisting and dehydrating device according to claim 5, characterized in that, the included angle between the dehydrating plate and the horizontal plane is 20 - 30° smaller than the included angle between the inclined plate and the horizontal plane.

7. The pipeline type gas demisting and dehydrating device according to claim 1, characterized in that, In the first axis direction, the first length of the bent portion is 20 - 30% of the second length of the demisting plate.

8. The pipeline type gas demisting and dehydrating device according to claim 1, characterized in that when observing along the first axis direction, among two adjacent demisting plates, the lower end of the second vertical plate of the demisting plate located on the upper side extends downward beyond the lower end of the first vertical plate of the demisting plate located on the lower side.

9. The pipeline type gas demisting and dehydrating device according to claim 1, characterized in that in the first axis direction, the net distance between the concave-convex plate and the demisting plate group is 3.5 - 6 times the thickness of the demisting plate group.

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