High-precision gas-liquid coalescence filter element

Abstract

The high-precision gas-liquid coalescence filter element comprises an upper end cover and a lower end cover, the upper end cover and the lower end cover are oppositely arranged, a gas inlet is formed in the center of the end face of the lower end cover, and inserting grooves are fixedly formed in the outer rings of the opposite faces of the upper end cover and the lower end cover; an outer framework, a filter element coalescence layer, a filter element liquid drainage layer and an inner framework are sequentially installed in an inner cavity of the inserting groove from outside to inside, a flow guide plate is fixedly connected to the inner wall of an inner cavity of the inner framework, and the flow guide plate is fixedly connected to the inner wall of the inner cavity of the inner framework in a spiral shape. The pressure in the filter element is greatly reduced, and the service life of the filter element is prolonged.

Description

Technical Field

[0001] The present disclosure specifically discloses a filter element technology field, specifically relates to a high-precision gas-liquid coalescing filter element. Background Art

[0002] The gas-liquid coalescing filter element is that when the gas passes through the filter element from the inside to the outside, the tiny droplets are captured by the filter fibers of the first-stage coalescing layer and the second-stage coalescing layer in turn. The small droplets continue to gather on the coalescing material fibers and move to the outside of the coalescing material layer under the impetus of the airflow. The above process is repeated until they grow into large droplets. The outermost layer of the filter element is the drainage layer. When the droplets reach the outermost layer, the grown large droplets quickly settle and are separated from the gas phase by their own gravity.

[0003] According to application number 202122254693.5, a gas-liquid coalescing filter element is disclosed, which belongs to the technical field of filter elements, and includes a sealing gasket, an end cap, an inner frame, a wire-wound filter layer, a middle frame and a deliquidation layer. The inner frame is placed inside the middle frame, a deliquidation layer is arranged outside the middle frame, a wire-wound filter layer is arranged between the inner frame and the middle frame, and the two ends of the wire-wound filter layer, the inner and outer frames and the deliquidation layer are bonded to the end caps for sealing, and a sealing gasket is arranged at the end cap;

[0004] The existing gas-liquid coalescing filter element adopts a wire-wound filter layer, and the wear and impact of particulate impurities are mitigated by increasing the thickness of the filter element. When the airflow contains high-viscosity liquid impurities and other complex working conditions, the impurities adhere to the porous medium and are not easy to be discharged, which will block the porous medium and cause a sharp increase in pressure drop, resulting in a shortened filter element life and the need for frequent replacement. In addition, liquid is easily accumulated at the end cover of the traditional filter element, and the large droplets coalesced cannot be discharged in time. For this reason, we propose a high-precision gas-liquid coalescing filter element. Summary of the invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide a structure that can quickly drain liquid and is easy to disassemble and assemble.

[0006] A high-precision gas-liquid coalescing filter element comprises an upper end cover and a lower end cover, the upper end cover and the lower end cover are arranged opposite to each other, an air inlet is opened at the center of the end face of the lower end cover, slots are fixedly opened on the outer circles of the opposite surfaces of the upper end cover and the lower end cover, an outer skeleton, a filter element coalescing layer, a filter element drainage layer and an inner skeleton are sequentially installed in the inner cavity of the slot from the outside to the inside, a guide plate is fixedly connected to the inner wall of the inner cavity of the inner skeleton, and the guide plate is spirally fixedly connected to the inner wall of the inner cavity of the inner skeleton.

[0007] According to the technical solution provided in the embodiment of the present application, the width of the guide plate is smaller than the cross-sectional radius of the inner frame, and second guide grooves are evenly opened on the upper end surface of the guide plate, and the cross-section of the second guide grooves is semicircular.

[0008] According to the technical solution provided in the embodiment of the present application, the inner skeleton includes a first guide groove and an arc plate, and the first guide groove and the arc plate are cross-connected to form a circular ring.

[0009] According to the technical solution provided in the embodiment of the present application, a bell mouth is provided in the center of the upper end surface of the lower end cover, and the bell mouth is connected to the air inlet.

[0010] According to the technical solution provided in the embodiment of the present application, the filter element coalescing layer is a porous structure layer formed by shaped fibers with a pore size of 3 μm-8 μm, and the thickness of the filter element coalescing layer is 0.4 mm-0.6 mm.

[0011] According to the technical solution provided in the embodiment of the present application, the filter element drainage layer is a porous structure layer formed by shaped fibers, the pore size is 10 μm-20 μm, and the thickness of the filter element drainage layer is 2 mm-3 mm.

[0012] In summary, the present application discloses a high-precision gas-liquid coalescing filter element.

[0013] Beneficial effects:

[0014] 1. Through the guide plate and the second guide groove, a spiral guide plate is used to ensure that the gas is transported upward in a rotating manner. The gas generates centrifugal force, and the large droplets are first thrown to the upper end surface of the guide plate. After passing through a certain separation space, the small droplets are thrown to the first guide groove and the inside of the annular plate. The droplets on the guide plate can be led out of the filter element through the second guide groove, and the droplets inside the inner skeleton can be discharged through the first guide groove.

[0015] 2. Through the inner skeleton and the bell mouth, the first guide groove can quickly introduce small droplets into the lower part of the filter element to prevent the small droplets from gathering inside the inner skeleton, thereby entering the filter element coalescing layer through gas transmission, greatly reducing the pressure of the filter element. At the same time, the bell mouth is used for diversion to ensure that the droplets flow out of the filter element through the inclined surface of the bell mouth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0017] Figure 1 It is a schematic diagram of a high-precision gas-liquid coalescing filter element in this application;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the high-precision gas-liquid coalescing filter element in this application;

[0019] Figure 3 It is a schematic diagram of the internal skeleton structure in this application.

[0020] In the figure: 1. upper end cover; 2. lower end cover; 3. air inlet; 4. outer frame; 5. slot; 6. inner frame; 61. first guide groove; 62. arc plate; 7. filter element coalescing layer; 8. filter element drainage layer; 9. bell mouth; 10. guide plate; 11. second guide groove. DETAILED DESCRIPTION

[0021] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] As mentioned in the background technology, the gas-liquid coalescing filter element in the prior art adopts a wire-wound filter layer, and the wear and impact of shear particle impurities are mitigated by increasing the thickness of the filter element. When the gas flow contains complex working conditions such as high-viscosity liquid impurities, the impurities adhere to the inside of the porous medium and are not easy to be discharged, which will block the porous medium and cause a sharp increase in pressure drop, resulting in a shortened filter element life and the need for frequent replacement. In addition, liquid is easily accumulated at the end cover of the traditional filter element, and the large droplets coalesced cannot be discharged in time. The present invention proposes a structure that can quickly drain liquid and is easy to disassemble and assemble.

[0024] Example 1

[0025] See also Figure 1 A high-precision gas-liquid coalescing filter element comprises an upper end cover 1 and a lower end cover 2, and the end face diameters of the upper end cover 1 and the lower end cover 2 are equal, and the upper end cover 1 and the lower end cover 2 are arranged opposite to each other, and an air inlet 3 is opened at the center of the end face of the lower end cover 2, and slots 5 are fixedly opened on the outer circles of the opposite surfaces of the upper end cover 1 and the lower end cover 2, and an outer skeleton 4, a filter element coalescing layer 7, a filter element drainage layer 8 and an inner skeleton 6 are sequentially installed in the inner cavity of the slot 5 from the outside to the inside, and the sum of the thickness of the outer skeleton 4, the filter element coalescing layer 7, the filter element drainage layer 8 and the inner skeleton 6 matches the width of the slot 5, so as to ensure that the upper end cover 1 and the lower end cover 2 are stably and fixedly connected to the filter element.

[0026] See also Figure 2 In order to facilitate liquid discharge and generate a rotating airflow for the gas entering the filter element, a guide plate 10 is fixedly connected to the inner wall of the inner cavity of the inner skeleton 6, and the guide plate 10 is spirally fixedly connected to the inner wall of the inner cavity of the inner skeleton 6. When the airflow flows in the guide plate 10, the droplets are separated under the action of centrifugal force and thrown to the upper end surface of the guide plate 10 and discharged downward under the action of gravity.

[0027] See also Figure 2In order to ensure the convenience of disassembly and assembly of the inner frame 6 and the convenience of cleaning the inner frame 6, the width of the guide plate 10 is smaller than the cross-sectional radius of the inner frame 6 to ensure that the gas can also flow directly upward. At the same time, in order to facilitate the liquid to flow down, a second guide groove 11 is evenly opened on the upper end surface of the guide plate 10, and the cross-section of the second guide groove 11 is semicircular, which facilitates the liquid to flow out along the rotation direction of the guide plate 10.

[0028] See also Figure 3 In order to improve the drainage efficiency, the guide plate 10 provides a certain separation space for the rotating airflow, so that the droplets entrained in the rotating airflow are separated under the action of centrifugal force and thrown to the inner wall of the inner skeleton 6, and the droplets on the inner wall gather together. The inner skeleton 6 is composed of a first guide groove 61 and an arc plate 62. The first guide groove 61 and the arc plate 62 are cross-connected to ensure that the droplets thrown inside the arc plate 62 and the first guide groove 61 can flow down along the first guide groove 61.

[0029] See also Figure 2 In order to facilitate the droplets temporarily retained on the upper end surface of the lower end cover 2 to flow out of the filter element body, a bell mouth 9 is opened in the center of the upper end surface of the lower end cover 2, and the bell mouth 9 is connected to the air inlet 3. The droplets enter the air inlet 3 through the inclination of the bell mouth 9, ensuring that the droplets will not remain inside the filter element.

[0030] See also Figure 2 The filter element coalescing layer 7 is a porous structure layer formed by shaped fibers, the pore size is 3 μm-8 μm, and the thickness of the filter element coalescing layer 7 is 0.4 mm-0.6 mm.

[0031] Example 2

[0032] See also Figure 2 The filter element drainage layer 8 is a porous structure layer formed by shaped fibers, the pore size is 10 μm-20 μm, and the thickness of the filter element drainage layer 8 is 2 mm-3 mm.

[0033] Working principle: When in use, natural gas enters the filter element through the air inlet 3, and the gas rotates upward through the guide plate 10 and circulates, and combined with the inner skeleton 61, a certain separation space is given to the entrained droplets, and droplets are generated under the action of centrifugal force. Large droplets are first thrown to the upper end surface of the guide plate 10, and small droplets are thrown to the first guide groove 61 and the arc plate 62 after a certain separation space. The droplets on the guide plate 10 can be led out of the filter element through the second guide groove 11, and the droplets inside the inner skeleton 6 can be discharged through the first guide groove 61. The filter element coalescing layer 7 and the filter element drainage layer 8 are both made of shaped fibers, which have a better ability to intercept droplets through the larger specific surface area of ​​the shaped fibers, and the ability to absorb and transfer liquids is enhanced through the strong liquid wicking ability of the shaped fibers, preventing a large amount of liquid from accumulating in the filter element, so that the filter element can not only improve efficiency, absorb liquids but also discharge liquids, that is, while improving the filtration efficiency, it can significantly reduce the filtration pressure drop of the filter element.

[0034] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A high-precision gas-liquid coalescing filter element, comprising an upper end cover (1) and a lower end cover (2), characterized in that: The upper end cover (1) and the lower end cover (2) are arranged opposite to each other, an air inlet (3) is provided at the center of the end face of the lower end cover (2), and slots (5) are fixedly provided on the outer circles of the opposite surfaces of the upper end cover (1) and the lower end cover (2), and the inner cavity of the slot (5) is sequentially installed with an outer frame (4), a filter element coalescing layer (7), a filter element drainage layer (8) and an inner frame (6) from the outside to the inside, and a guide plate (10) is fixedly connected to the inner wall of the inner cavity of the inner frame (6), and the guide plate (10) is fixedly connected to the inner wall of the inner cavity of the inner frame (6) in a spiral shape.

2. The high-precision gas-liquid coalescing filter element according to claim 1, characterized in that: The width of the guide plate (10) is smaller than the cross-sectional radius of the inner frame (6); the upper end surface of the guide plate (10) is evenly provided with second guide grooves (11); and the cross-section of the second guide grooves (11) is semicircular.

3. The high-precision gas-liquid coalescing filter element according to claim 1, characterized in that: The inner frame (6) comprises a first guide groove (61) and an arc-shaped plate (62), wherein the first guide groove (61) and the arc-shaped plate (62) are cross-connected to form a circular ring.

4. The high-precision gas-liquid coalescing filter element according to claim 1, characterized in that: A bell mouth (9) is provided at the center of the upper end surface of the lower end cover (2), and the bell mouth (9) is connected to the air inlet (3).

5. The high-precision gas-liquid coalescing filter element according to claim 1, characterized in that: The filter element coalescence layer (7) is a porous structure layer formed by shaped fibers, with a pore size of 3 μm-8 μm, and a thickness of 0.4 mm-0.6 mm.

6. The high-precision gas-liquid coalescing filter element according to claim 1, characterized in that: The filter element drainage layer (8) is a porous structure layer formed by special-shaped fibers, with a pore size of 10 μm-20 μm, and a thickness of 2 mm-3 mm.

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