CN210584170U - Coalescence filter core structure and filter equipment - Google Patents

Abstract

The application provides a coalescence filter core structure and filter equipment includes: the bottom end of the first inner framework is provided with at least one internal liquid drainage flow channel and an air inlet, the first inner framework is surrounded to form a space to be filtered, and the space to be filtered is communicated with the air inlet; the first inner framework is sleeved with the following components in sequence: a pre-filter layer and a liquid collection layer; the second inner framework is sleeved outside the liquid collecting layer, a gap space is formed between the liquid collecting layer and the second inner framework, and the gap space is communicated with the internal liquid drainage flow channel; the outer framework is sleeved outside the second inner framework, and a coalescence space is formed between the second inner framework and the outer framework; a filter element disposed within the coalescing space; the upper end cover at least plugs the end part of the space to be filtered; the lower end cover is provided with an opening used for being inserted into the first inner framework, and the lower end cover is detachably connected with the bottom end of the first inner framework. The application provides a coalescence filter core structure and filter equipment can prolong the life of coalescence filter core.

Description

Coalescence filter core structure and filter equipment

Technical Field

The utility model relates to a gas-liquid filter field, concretely relates to coalescence filter core structure and filter equipment.

Background

In the long-distance natural gas transmission pipeline, the natural gas is generally carried with solid and liquid impurities, and the existence of the impurities can endanger the safety of pipeline instruments and compressor units, so that a corresponding gas-liquid filtering device, such as a coalescing filter, is required to be arranged for removing the impurities in the natural gas. The core component of the coalescence filter for removing the tiny liquid drops in the natural gas is a coalescence type filter element, the requirement on the filtering precision is high, and the coalescence type filter is mainly used for removing liquid drop particles with the particle size of less than 1 mu m.

Please refer to fig. 1 to 3 for a filter element structure and a filter device in the prior art. As shown in fig. 1 to 3, the coalescing filter element 2 is supported by a second inner frame 201, and a coalescing layer 203 filter material is wound around the outer side thereof, and then the coalescing layer 203 filter material is fastened by the outer frame 202, and a drainage layer 204 filter material is further wound around the outer side of the outer frame 202. The upper end cover 22 of the coalescing filter element 2 and the lower end cover 23 of the coalescing filter element 2 are used for sealing the inner framework, the outer framework, the coalescing layer 203 and the drainage layer 204, so that the gas containing liquid and dust can only pass through the coalescing filter element 2 in the radial direction. The mechanism of adopting the device to filter is as follows: gas containing liquid drops or solid particles enters from an air inlet pipeline 3 of the filter, then the gas enters from the pores of the coalescing filter element 2 under the action of pressure difference, when the gas passes through the coalescing filter element 2, the liquid drops in the gas are intercepted by fibers in a filter material of the coalescing layer 203, then small liquid drops form larger liquid drops in the filter material through collision among the liquid drops or interaction between the liquid drops and the fibers, then the liquid drops are transported to a liquid discharge layer 204 and discharged, the discharged liquid is discharged to the outside of the filter through a first liquid discharge pipeline 4, and the filtered clean gas is discharged from a gas discharge pipeline 5 of the filter.

Because the filter precision requirement of the coalescence filter element is higher, the aperture of the coalescence filter element needs to be smaller to meet the requirement. While the natural gas in the gas transmission pipeline contains more complex impurities, and the liquid impurities mainly comprise condensate oil, free water, lubricating oil and other high-viscosity liquid drops carried by a compressor unit of the gas station. Especially in multiphase flow conditions, when the working conditions change greatly, the fluctuation of the liquid content and the dust content in the gas is large. When the filter is in a working condition of high-concentration impurities and large-particle-size liquid drops, the treatment capacity of the coalescence filter element in the prior art cannot meet the use requirement, impurities in gas block at the air inlet side of the coalescence filter element to block the filter element, so that the pressure drop of the filter element rapidly rises, liquid drops captured by the coalescence filter element enter downstream air flow again under the drive of the air flow, the concentration of the liquid drops in the downstream air flow is increased, the filtering efficiency is reduced, and at the moment, the operation of the filter must be suspended and the filter element needs to be replaced in time.

In the prior art, once the pressure drop of the filter element is overlarge, the filter material needs to be replaced. Because the mode of gluing fixedly is usually adopted between filter media and the end cover to seal, need change the whole coalescence filter core when changing the filter media, the unable reuse of filter core. In addition, because the materials used by the filter element are expensive, if the filter element is frequently replaced, the operation cost is higher.

SUMMERY OF THE UTILITY MODEL

In view of this, the application provides a coalescence filter core structure and filter equipment, under the higher condition of liquid-containing dust content, can be great degree improve the too fast problem of increase of filter core pressure drop, prolonged the life of coalescence filter core. The technical scheme is as follows:

a coalescing filter element arrangement, comprising: the filter comprises a first inner framework, a second inner framework and a filter body, wherein the first inner framework is provided with a top end and a bottom end which are opposite to each other, at least one internal liquid drainage flow channel is arranged on the bottom end, and a space to be filtered is surrounded by the first inner framework; the first inner framework is sequentially sleeved with: a pre-filtering layer for filtering impurities and a liquid collecting layer for capturing liquid drops; a second inner framework sleeved outside the liquid collecting layer, wherein a gap space is formed between the liquid collecting layer and the second inner framework and is communicated with the internal liquid drainage flow channel; the outer framework is sleeved outside the second inner framework, and a coalescence space is formed between the second inner framework and the outer framework; a filter element disposed within the coalescing space; the upper end cover is arranged at the top end of the outer framework and is matched with the top end of the first inner framework to plug the end part of the space to be filtered; the lower end cover is arranged at the bottom end of the outer framework, the lower end cover is detachably connected with the bottom end of the first inner framework, and the lower end cover is provided with an air inlet communicated with the space to be filtered.

In a preferred embodiment, the internal drainage flow channel extends at an oblique angle to the horizontal plane, and is communicated with the space to be filtered.

As a preferred embodiment, the filter cartridge comprises: the coalescence layer and the liquid drainage layer are sequentially sleeved in the coalescence space, the aperture of the coalescence layer is smaller than that of the liquid drainage layer, the coalescence layer is provided with a lyophobic channel with lyophobic property, and the liquid drainage layer is provided with a lyophilic channel with lyophilic property;

liquid drops in the gas can be conveyed to the liquid drainage layer along the liquid dredging channel after being gathered by the gathering layer, partial liquid drops conveyed to the liquid drainage layer under the driving of the gas flow can be discharged to the outside of the filter element through the pores of the liquid drainage layer, and partial liquid drops can flow along the lyophilic channel.

In a preferred embodiment, the lyophobic passages are arranged at intervals, and the extending direction of the lyophobic passages has a predetermined inclined angle with respect to the horizontal plane, and the liquid drops carried in the gas can be transported to the liquid drainage layer along the predetermined inclined angle.

In a preferred embodiment, the predetermined inclination angle is 30 ° to 60 °.

In a preferred embodiment, the lyophilic passage has a plurality of lyophilic passages, the plurality of lyophilic passages are arranged at intervals, the extending direction of the lyophilic passage is perpendicular to the horizontal direction, and a part of the liquid drops transported to the liquid discharge layer can flow downward through the lyophilic passage.

In a preferred embodiment, the lyophilic channel is specifically a nanofiber membrane, the nanofiber membrane is combined on the drainage layer to form the lyophilic channel, and the diameter of the nanofiber membrane is 0.1-0.5 μm.

As a preferred embodiment, the upper end cover is provided with a groove matched with the top end of the first inner framework, and the lower end cover is in threaded connection with the bottom end of the first inner framework.

In a preferred embodiment, the fiber diameter of the pre-filter layer is 2 to 15 μm, and the fiber diameter of the liquid collecting layer is 15 to 25 μm.

A filter device having a housing with a hollow cavity, the housing being provided with an exhaust line and an intake line, comprising:

a coalescing filter element structure disposed within the hollow cavity, a drainage space being formed between the coalescing filter element structure and the housing;

the first liquid discharge pipeline is communicated with the liquid discharge space;

wherein the coalescing filter element arrangement comprises: a first inner frame, first inner frame has relative top and bottom, be provided with on the bottom: the first inner framework is arranged to surround to form a space to be filtered, the space to be filtered is communicated with the air inlet, and the air inlet is communicated with the air inlet pipeline; the first inner framework is sequentially sleeved with: a pre-filtering layer for filtering impurities and a liquid collecting layer for capturing liquid drops; a second inner framework sleeved outside the liquid collecting layer, wherein a gap space is formed between the liquid collecting layer and the second inner framework and is communicated with the internal liquid drainage flow channel; the outer framework is sleeved outside the second inner framework, and a coalescence space is formed between the second inner framework and the outer framework; a filter element disposed within the coalescing space; the upper end cover is arranged at the top end of the outer framework and at least plugs the end part of the space to be filtered; the lower end cover is arranged at the bottom end of the outer framework, is provided with an opening for inserting the first inner framework, and is detachably connected with the bottom end of the first inner framework;

a second drain line in communication with the internal drain runner;

and the pressure detection unit is used for detecting the pressure parameter of the coalescence filter element structure and is arranged on the exhaust pipeline and the air inlet pipeline. The coalescing filter element structure and the filtering device provided by the embodiment of the application have the following advantages and characteristics: when the gas is in multiphase flow and the working condition changes greatly, a large number of liquid drops with large particle size and solid particles are carried in the gas. Gas enters a space to be filtered through the gas inlet, sequentially passes through the first inner framework, the pre-filtering layer and the liquid collecting layer for filtering, and then enters the filter element through the second inner framework for filtering and then is discharged. In the process, when the gas passes through the pre-filtering layer, the pre-filtering layer can intercept most of solid impurities carried in the gas, so that the solid impurities are prevented from blocking the filter element; when the liquid collecting layer passes through, the liquid collecting layer can capture liquid drops with large particle sizes in time, and the captured liquid drops are discharged in time along the internal liquid discharge flow channel at the bottom end of the first inner framework, so that the influence on the subsequent filtration of gas is avoided. So for the gas that gets into in the filter core contains dirt, contains liquid concentration and is showing and reduce, thereby can be great degree improve the too fast problem of filter core pressure drop increase, prolong the life of filter core, reduce running cost.

Furthermore, the filtering device is further provided with a pressure detection unit for detecting the pressure parameter of the coalescing filter element structure, and the pressure detection unit is respectively arranged on the exhaust pipeline and the air inlet pipeline. When a large amount of liquid drops with large particle size and solid particles are carried in the gas, once the pressure drop of the coalescence filter element structure is increased, only the pre-filtering layer and the liquid collecting layer on the first inner framework are detached and replaced on the basis of keeping the second inner framework filter element and the outer framework, so that the problem of frequent replacement of the filter element is avoided.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

FIG. 1 is a schematic diagram of a prior art coalescing filter element filter apparatus;

FIG. 2 is a schematic representation of a prior art coalescing filter element;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic structural diagram of a filtering apparatus provided in an embodiment of the present application;

FIG. 5 is a schematic view of a coalescing filter element arrangement provided in accordance with an embodiment of the present application;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is a schematic view of a first inner frame structure provided in accordance with an embodiment of the present disclosure;

FIG. 8 is a cross-sectional view taken at C-C of FIG. 7;

FIG. 9 is a schematic illustration of a coalescing layer structure provided in accordance with embodiments of the present application;

fig. 10 is a schematic view of a liquid discharge layer structure according to an embodiment of the present disclosure.

Description of reference numerals:

1. a housing; 2. filter element/coalescing filter element; 200. a liquid discharge space; 201. a second inner skeleton; 202. an outer skeleton; 203. a coalescing layer; 203a and a lyophobic channel; 204. draining the liquid layer; 204a, a lyophilic channel; 210. a space to be filtered; 211. a first inner skeleton; 211a, external threads; 212. a pre-filter layer; 213. a liquid collecting layer; 22. an upper end cover; 23. a lower end cover; 231. an internal drainage flow channel; 3. an air intake line; 4. a first drain line; 5. an exhaust line; 6. a second drain line.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments, it should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope, and after reading the present invention, the modifications of the various equivalent forms of the present invention by those skilled in the art will fall within the scope defined by the present application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

An embodiment of the present application provides a coalescing filter element structure, please refer to fig. 4 to 7, including: first inner frame 211, first inner frame 211 has relative top and bottom, be provided with on the bottom: the filter comprises at least one internal liquid drainage flow channel 231 and an air inlet, wherein a space 210 to be filtered is formed by the first internal framework 211 in a surrounding mode, and the space 210 to be filtered is communicated with the air inlet; establish in proper order the first inner frame 211 is outside: a pre-filter layer 212 for filtering impurities and a liquid trap layer 213 for trapping liquid droplets; a second inner frame 201 sleeved outside the liquid collecting layer 213, wherein a gap space is formed between the liquid collecting layer 213 and the second inner frame 201, and the gap space is communicated with the internal liquid drainage flow channel 231; an outer framework 202 sleeved outside the second inner framework 201, wherein a coalescence space is formed between the second inner framework 201 and the outer framework 202; a filter element 2 disposed in said coalescence space; the upper end cover 22 is arranged at the top end of the outer framework 202, and the upper end cover 22 at least seals off the end part of the space 210 to be filtered; the setting is in lower end cover 23 of exoskeleton 202 bottom, lower end cover 23 is provided with and is used for inserting the opening of first inner frame 211, lower end cover 23 with the connection can be dismantled to the bottom of first inner frame 211.

When the gas is in multiphase flow and the working condition changes greatly, a large number of liquid drops with large particle size and solid particles are carried in the gas. The gas enters the space 210 to be filtered through the gas inlet, sequentially passes through the first inner framework 211, the pre-filtering layer 212 and the liquid collecting layer 213 for filtering, enters the filter element 2 through the second inner framework 201 for filtering, and is discharged. In the process, when passing through the pre-filter layer 212, the pre-filter layer 212 can intercept most of the solid impurities entrained in the gas, thereby preventing the solid impurities from blocking the filter element 2; when passing through the liquid collecting layer 213, the liquid collecting layer 213 can capture droplets with large particle size in time, and the captured droplets are discharged in time along the internal liquid discharge flow channel 231 at the bottom end of the first inner skeleton 211, thereby avoiding the influence on the subsequent filtration of the gas. So for the gas that gets into in the filter core 2 contains dust, contains liquid concentration and is showing and reduce, thereby can be great degree improve the 2 pressure drops of filter core and increase too fast problem, prolong the life of filter core 2, reduce running cost.

The first endoskeleton 211 is used to provide support for the pre-filter layer 212 and the liquid collection layer 213. The first inner frame 211 has a body extending in the longitudinal direction, and the body is provided with through holes along the longitudinal direction thereof, so as to be used for gas circulation. First inner frame 211 is the cylindricality structure, first inner frame 211 encloses to establish and treats that filtration space 210 is waited to form. The pre-filter layer 212 and the liquid collecting layer 213 are sequentially sleeved outside the first inner framework 211. The pre-filtering layer 212 is used for filtering most solid impurities entrained in the gas, and the liquid collecting layer 213 can capture liquid drops with large particle size in the gas in time. Materials such as glass fibers, polypropylene, polyester fibers, and metal fibers may be used for the pre-filter layer 212 and the collector layer 213.

The cylindrical structure includes a cylindrical structure, a triangular prism structure, a quadrangular prism structure, etc., including but not limited to these, for convenience of description, the cylindrical structure is taken as an example in the embodiments of the present application to illustrate various components, and it will be understood by those skilled in the art that the cylindrical structure is only an example and is not a limitation of the present application.

Referring to fig. 5, 7 and 8, the first inner frame 211 has opposite top and bottom ends, the bottom end is provided with at least one internal drainage channel 231 and an air inlet, and the air inlet is communicated with the space 210 to be filtered. Gas enters the space to be filtered 210 from the gas inlet, and is sequentially treated by the pre-filtering layer 212 and the liquid collecting layer 213, and liquid drops captured by the liquid collecting layer 213 can be discharged to the outside of the coalescing filter element structure along the internal liquid discharge flow channel 231. Specifically, the width of the bottom end of the first inner frame 211 is greater than the width of the pre-filter layer 212 and the liquid collecting layer 213, and the liquid captured by the liquid collecting layer 213 falls into the bottom end of the first inner frame 211 under the action of gravity and flows out along the internal liquid drainage flow channel 231.

Preferably, the fiber diameter of the pre-filter layer 212 is 2 to 15 μm, and the fiber diameter of the liquid collection layer 213 is 15 to 25 μm. The gas is filtered by the pre-filter layer 212 and the liquid collecting layer 213, and then enters the filter element 2 through the second inner frame 201. The pre-filtering layer 212 intercepts solid impurities carried in the gas, the liquid collecting layer 213 can capture large-particle-size liquid drops carried in the gas, and then the liquid drops are timely discharged along the internal liquid discharge flow channel 231 at the bottom end of the first inner framework 211, so that the gas is prevented from carrying the liquid drops again to avoid influencing a subsequent filtering link.

Further, the inner drainage flow path 231 may extend at an oblique angle to the horizontal plane, and the inner drainage flow path 231 communicates with the space to be filtered 210. The horizontal plane is exemplified by the installation direction shown in fig. 4 to 7, and the horizontal plane direction in the embodiment of the present application refers to the direction of the coalescing filter element structure in the normal use state, and does not limit the direction of the filter element structure in the embodiment of the present application in other scenes that may cause the orientation of the structure to be reversed or the position to be changed, such as use, transportation, and the like. The number of the internal drainage channels 231 is not particularly limited in this application.

In this embodiment, the internal liquid drainage channels 231 are uniformly arranged at the bottom end of the first inner frame 211 in the circumferential direction, the internal liquid drainage channels 231 are symmetrically distributed, and the internal liquid drainage channels 231 are all communicated with the space 210 to be filtered. The droplets with large particle size captured by the liquid collecting layer 213 can be collected to the space 210 to be filtered through the plurality of internal liquid discharging flow channels 231 and discharged together.

The outer sleeve of liquid collection layer 213 is equipped with second inner frame 201 and exoskeleton 202. A gap space is formed between the second inner frame 201 and the liquid collecting layer 213, the gap space is communicated with the internal liquid drainage channel 231, and liquid drops captured by the liquid collecting layer 213 enter the gap space under the action of gravity and then are timely discharged from the internal liquid drainage channel 231.

The second inner frame 201 and the outer frame 202 both have a body extending longitudinally, and the body is provided with through holes along the longitudinal direction thereof, so as to be used for gas circulation. Specifically, the second inner frame 201 and the outer frame 202 are both cylindrical structures, and the outer frame 202 is sleeved on the outside of the first inner frame 201. Second inner frame 201 is used for providing the support for the filter core, second inner frame 201 with enclose between the outer frame 202 and establish and form the coalescence space, filter core 2 is located in the coalescence space, filter core 2 continues to filter the gas after prefiltration layer 212 and collecting layer 213 are handled.

The upper end cover 22 is arranged at the top end of the outer framework 202, and the upper end cover 22 at least can seal the end part of the space 210 to be filtered after being matched with the top ends of the outer framework 202 and the first inner framework 211. The lower end cover 23 is arranged at the bottom end of the outer framework 202, the lower end cover 23 is provided with an opening used for being inserted into the first inner framework 211, and the lower end cover 23 is detachably connected with the bottom end of the first inner framework 211.

In this embodiment, the upper end cap 22 is provided with a groove matched with the top end of the first inner frame 211, and the lower end cap 23 and the bottom end of the first inner frame 211 can be connected through a threaded structure. Specifically, the upper end of first inner frame 211 can insert through the recess in the upper end cover 22, lower end cover 23 is provided with internal thread structure, first inner frame 211 be provided with internal thread structure matched with external screw thread 211a structure. When detaching, the upper end cap 22 may be detached first, and then the first inner frame 211 may be screwed off from the lower end cap 23 by a screw structure, so that the pre-filter layer 212 and the liquid collection layer 213 may be replaced.

In the present embodiment, the filter element 2 includes: the coalescence layer 203 and the drainage layer 204, the coalescence layer 203 with drainage layer 204 overlaps in proper order and is established in the coalescence space, the aperture of coalescence layer 203 is less than the aperture of drainage layer 204, coalescence layer 203 is provided with the lyophobic channel 203a of lyophobic characteristic, drainage layer 204 is provided with the lyophilic channel 204a that has the lyophilic characteristic. The liquid drops in the gas can be transported to the liquid drainage layer 204 along the liquid-repellent channel 203a after being gathered by the aggregation layer 203, a part of the liquid drops transported to the liquid drainage layer 204 under the driving of the gas flow can be discharged to the outside of the filter element 2 through the pores of the liquid drainage layer 204, and a part of the liquid drops can flow along the lyophilic channel 204 a.

Specifically, the aggregation layer 203 and the liquid drainage layer 204 are both disposed between the second inner frame 201 and the outer frame 202. The gas after pre-filtration enters the coalescing layer 203 from the through holes on the second inner frame 201, the coalescing layer 203 is mainly made of a material with a small pore diameter, the material with hydrophilic and oleophilic properties is selected, and the liquid drops with small particle size carried in the gas can be captured by the small fiber diameter and then are transported to the drainage layer 204. Preferably, the coalescing layer 203 is a glass fiber substrate. The drainage layer 204 is made of a material having a larger pore size than the coalescing layer 203 to provide a drainage path for the liquid after passing through the coalescing layer 203. The drainage layer 204 is made of a material with hydrophobic and oleophobic characteristics, and preferably, the drainage layer 204 is made of a needle-punched felt substrate. The discharged liquid droplets passing through the liquid discharge layer 204 are discharged to the outside by the through holes on the exoskeleton 202 under the influence of the gas.

Further, as shown in fig. 9, the coalescing layer 203 is further provided with a plurality of lyophobic passages 203a having lyophobic property, and the plurality of lyophobic passages 203a are spaced apart on the surface of the coalescing layer 203. The lyophobic channel 203a can attach an oleophobic and hydrophobic fiber membrane with a certain width on the glass fiber substrate of the aggregation layer 203 by a thermal fusion method. The lyophobic passages 203a may also be disposed on the glass fiber substrate of the coalescing layer 203 by plasma spraying, surface modification, or the like.

In general, the coalescing layer 203 can quickly wet the substrate after capturing the liquid drops, and a plurality of liquid channels are arranged in the substrate of the coalescing layer 203, and after the substrate is wetted, the liquid channels spread to the periphery and are connected with each other to form a large liquid area, so that the liquid content in the coalescing layer 203 is increased, at the moment, the liquid is not easy to discharge, and the resistance of the filter element is easily increased. This application embodiment is through being provided with interval distribution's lyophobic passageway 203a on coalescence layer 203 that has the lyophilic characteristic, can prevent the regional formation of large liquid, and the liquid drop can be through lyophobic passageway 203a rapid discharge coalescence layer 203 to reduce the liquid content of coalescence layer 203, reduce the gas flow simultaneously and hinder, make the filter core pressure drop slowly increase. Preferably, the width of the lyophobic channel 203a is 10-20 mm, and the distance between adjacent lyophobic channels 203a is 20-40 mm.

Still further, as shown in fig. 10, the liquid discharge layer 204 is provided with a plurality of lyophilic passages 204a having lyophilic characteristics, and the plurality of lyophilic passages 204a are spaced apart on the surface of the liquid discharge layer 204. The lyophilic channel 204a may attach an oleophilic and hydrophilic fiber membrane having a certain width to the needle felt substrate of the liquid discharge layer 204 by a thermal fusion method. The lyophilic channel 204a may also be disposed on the needle felt substrate of the liquid discharge layer 204 by plasma spraying, surface modification, or the like.

Generally, when the liquid in the coalescing layer 203 migrates to the drainage layer 204, the liquid cannot rapidly enter the interior of the drainage layer 204 due to the hydrophobic and oleophobic characteristics of the drainage layer 204, so that the liquid accumulates between the coalescing layer 203 and the drainage layer 204, resulting in a liquid film on the surface of the coalescing layer 203 and an increase in filter element pressure drop. And when gas passes through the liquid film, the liquid film is easily blown through, so that the liquid content of the downstream gas is increased, and the filtering of the filter element is invalid. In the present embodiment, the lyophilic channels 204a are provided at intervals in the liquid discharge layer 204 having a lyophobic property, so that a liquid discharge channel can be formed on the surface of the liquid discharge layer 204. Thereby can reduce the accumulation of the liquid drop between coalescence layer 203 and flowing back layer 204, reduce the formation of liquid film, effectively avoid the rapid increase of filter core pressure drop, improve the filter effect of filter core. Preferably, the width of the lyophilic channel 204a is 20-40 mm, so as to effectively absorb the liquid film gathered between the coalescence layer 203 and the liquid drainage layer 204, and the distance between the adjacent lyophilic channels 204a is 20-30 mm.

Preferably, the lyophilic channel 204a is specifically a nanofiber membrane, the nanofiber membrane is compounded on the liquid drainage layer 204 to form the lyophilic channel 204a, and the diameter of the nanofiber membrane is 0.1-0.5 μm. The nanofiber membrane has a large specific surface area and has strong adsorption capacity on liquid. In this way, when the liquid in the aggregation layer 203 is discharged, the liquid can be rapidly absorbed by the nanofiber membrane, thereby reducing the formation of a liquid film on the surface of the aggregation layer 203.

In one embodiment, the lyophobic passage 203a has a predetermined inclined angle between the extending direction and the horizontal plane, and the liquid droplets carried in the gas can be transported to the liquid discharge layer 204 along the predetermined inclined angle.

Specifically, the liquid droplets captured in the coalescing layer 203 can be rapidly discharged to the liquid drainage layer 204 along a predetermined inclination angle of the lyophobic passage 203a, a part of the liquid entering the liquid drainage layer 204 is discharged to the outside of the filter element 2 along the aperture of the liquid drainage layer 204 and the through hole of the exoskeleton 202 under the driving action of the air flow, and the other part of the liquid droplets is left downwards along the lyophilic passage 204a in the liquid drainage layer 204 and then discharged out of the filter element 2 under the action of the air flow. Preferably, the predetermined inclination angle of the lyophobic passage 203a is 30 ° to 60 °, so that smooth transfer of the droplets to the liquid discharge layer 204 is ensured, and rapid transfer of the droplets is promoted.

In one embodiment, the lyophilic passage 204a extends in a direction perpendicular to the horizontal direction, and a portion of the liquid droplets transferred to the liquid discharge layer 204 can flow downward through the lyophilic passage 204 a.

The present application further provides a filtering apparatus, please refer to fig. 4 to 7, the filtering apparatus has a housing 1 with a hollow cavity, the housing 1 is provided with an exhaust pipeline 5 and an intake pipeline 3, and the intake pipeline is communicated with an intake port on the first inner frame 211. The filtering device includes: the coalescing filter element structure is arranged in the hollow cavity, and a liquid discharge space 200 is formed between the coalescing filter element structure and the shell 1; a first drain line 4, the first drain line 4 being in communication with the drain space 200; a pressure detection unit for detecting a pressure parameter in the space 210 to be filtered.

Specifically, the housing 1 of the filter device has a hollow cavity, and the specific shape of the housing 1 is not limited in this application. The housing 1 has opposite closed ends and side walls enclosed between the top and bottom walls of the housing 1. The coalescing filter element structure is arranged in the hollow cavity of the filter device, and a liquid discharge space 200 is formed between the coalescing filter element structure and the shell 1. Can be provided with on the diapire of casing 1 with coalescence filter core structure's lower extreme lid 23 and first inner frame 211 matched with recess, through this recess, with coalescence filter core structure block to casing 1's diapire on, keep better stability. A sealing ring can be further arranged between the groove and the first inner framework 211.

The lateral wall of casing 1 is provided with exhaust pipe 5 and air inlet pipeline 3, air inlet pipeline 3 with air inlet intercommunication on the first inner frame 211 of coalescence filter core structure, gaseous ability by air inlet pipeline 3, air inlet get into the coalescence filter core structure in. The gas filtered by the coalescence filter element structure is discharged to the outside of the filtering device through the exhaust pipeline 5, so that subsequent production application is carried out. Still be provided with first drainage pipeline 4 on the filter equipment, be provided with on the casing 1 with first drainage pipeline 4 matched with drill way, first drainage pipeline 4 with drainage space 200 intercommunication gets into drainage space 200 under gaseous effect through coalescence filter core structure filterable liquid drop to discharge to filter equipment's outside through first drainage pipeline 4.

The filter device is also provided with a pressure detection unit for detecting a pressure parameter of the coalescing filter element structure. The pressure detecting units may be differential pressure sensors, which are respectively disposed on the exhaust line 5 and the intake line 3 of the housing 1. When an increase in pressure drop of the coalescing filter element arrangement inside the housing 1 is detected, only the pre-filter layer 212 and the liquid collection layer 213 on the first inner frame 211 can be removed and replaced while the second inner frame 201, the filter element 2, and the outer frame 202 are retained. Specifically, the upper end cover 22, the lower end cover 23 and the first inner framework 211 are matched and connected for disassembly, so that the first inner framework 211 can be taken out, the subsequent filter materials are replaced, and the problem that the filter element 2 is frequently replaced is solved. In this embodiment, the filter device further includes: a second drainage line 6 communicating with the space 210 to be filtered, the second drainage line 6 communicating with the internal drainage channel 231, and the pressure detection unit may be disposed on the second drainage line 6 and/or the air intake line 3.

The large-sized liquid droplets intercepted by the liquid collecting layer 213 can enter the second liquid discharge pipe 6 through the internal liquid discharge flow channel 231 and then be discharged to the outside of the filter device. In this embodiment, the internal drainage channels 231 are uniformly arranged at the bottom end of the first inner frame 211 in the circumferential direction, and the internal drainage channels 231 are all communicated with the space 210 to be filtered. The second drainage pipe 6 may be disposed at the bottom of the air inlet of the lower end cover 23, and is communicated with the space to be filtered 210. The liquid drops caught by the plurality of internal drainage channels 231 are collected to the space 210 to be filtered and then collectively discharged through the second drainage pipe 6.

In one embodiment, the second drain line 6 is in communication with the first drain line 4, and valves may be provided on the second drain line 6 and the first drain line 4 to control the discharge of liquid.

For a better understanding of the present application, the working process of the filtering device provided by the present application will be further explained below:

the gas with the liquid drops enters the space 210 to be filtered of the coalescing filter element structure from the gas inlet pipeline 3, and sequentially enters the pre-filtering layer 212 and the liquid collecting layer 213 from the first inner framework 211. The pre-filter layer 212 can intercept most of solid impurities in the gas, and the liquid collecting layer 213 can intercept large-particle-size liquid drops in the gas. The liquid drops captured by the liquid collecting layer 213 enter the internal liquid drainage channel 231 on the bottom of the first inner frame 211 through the gap space under the action of gravity and the driving action of gas, and are collected by the second liquid drainage pipeline 6 and then discharged.

And the gas after pre-filtration enters a subsequent filtration link from the gap space. Flows through the second inner framework 201, the coalescing layer 203, the drainage layer 204 and the outer framework 202 in sequence, and then is discharged to the outside of the coalescing filter element structure. The aggregation layer 203 is provided with a plurality of lyophobic channels 203a, the lyophobic channels 203 are arranged on the aggregation layer 203 at intervals, and an inclination angle of 30-60 degrees is formed between each lyophobic channel 203a and a horizontal plane. The liquid discharge layer 204 is provided with a plurality of lyophilic passages 204a, the plurality of lyophilic passages 204a are arranged on the liquid discharge layer 204 at intervals, and each lyophilic passage 204a is perpendicular to the horizontal direction.

The tiny droplets carried in the gas are captured by the fibers of the coalescing layer 203 while passing through the coalescing layer 203, and then rapidly drain to the drainage layer 204 along the inclined angle of the lyophobic passage 203 a. A part of the liquid entering the drainage layer 204 is discharged to the outside of the filter element 2 from the through hole of the outer frame 202 along the outer surface of the drainage layer 204 under the driving action of the air flow, and the other part of the liquid drops are left downwards along the lyophilic channel 204a in the drainage layer 204 and then discharged out of the filter element 2 under the action of the air flow. The liquid discharged through the liquid discharge layer 204 enters the liquid discharge space 200, and is collected by the first liquid discharge line 4 and discharged. The filtered gas is discharged from the exhaust pipeline 5 on the filtering device and enters the subsequent production and use.

When a large amount of liquid drops with large particle size and solid particles are carried in the gas, once the pressure drop of the coalescing filter element structure is increased by the pressure difference sensors on the gas inlet pipeline 3 and the gas outlet pipeline 5, the liquid collection layer 213 or/and the pre-filter layer 212 is/are seriously blocked, and at the moment, only the pre-filter layer 212 and the liquid collection layer 213 on the first inner framework 211 are disassembled and replaced on the basis of keeping the second inner framework 201, the filter element 2 and the outer framework 202.

The application provides a coalescence filter core structure and filter equipment has following advantage:

(1) the coalescing filter element structure provided by the application is additionally provided with the pre-filtering element, so that impurities with larger particle sizes in gas can be filtered in advance, the change of the impurity concentration in the gas is responded, the captured impurities are discharged in time, the dust-containing and liquid-containing concentrations of the gas entering the coalescing filter element are reduced, and the service life of the filter element is prolonged;

(2) according to the coalescence filter element structure, the lyophobic channel is additionally arranged on the coalescence layer, so that a large liquid area in the coalescence layer can be prevented from being formed, a liquid film is reduced, the liquid content in the filter element is reduced, and the increase of pressure drop is delayed;

(3) according to the coalescence filter element structure, the lyophilic channel is additionally arranged on the liquid drainage layer, so that a liquid film formed at the coalescence layer can be damaged, liquid is promoted to rapidly enter the liquid drainage layer, and the filtering effect of the filter element is improved;

(4) the application provides a prefiltration component convenient to detach easily changes, can deal with the higher operating mode of liquid or solid impurity concentration in the gas, when the filter core pressure drop appears increasing the too fast condition, only need change the filter media on the first inner frame can to avoided the filter core to change frequent problem, reduced running cost.

It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

The embodiments in the present specification are described in a progressive manner, and the same parts may be added to each other between the embodiments, and each embodiment focuses on the differences from the other embodiments.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes.

Claims (10)

1. A coalescing filter element arrangement, comprising:

a first inner frame, first inner frame has relative top and bottom, be provided with on the bottom: the first inner framework is arranged to surround to form a space to be filtered, and the space to be filtered is communicated with the air inlet;

the first inner framework is sequentially sleeved with: a pre-filtering layer for filtering impurities and a liquid collecting layer for capturing liquid drops;

a second inner framework sleeved outside the liquid collecting layer, wherein a gap space is formed between the liquid collecting layer and the second inner framework and is communicated with the internal liquid drainage flow channel;

the outer framework is sleeved outside the second inner framework, and a coalescence space is formed between the second inner framework and the outer framework;

a filter element disposed within the coalescing space;

the upper end cover is arranged at the top end of the outer framework and at least plugs the end part of the space to be filtered;

the lower end cover is arranged at the bottom end of the outer framework and provided with an opening used for being inserted into the first inner framework, and the lower end cover is detachably connected with the bottom end of the first inner framework.

2. The coalescing filter element assembly according to claim 1, wherein the internal drainage flow passage extends at an oblique angle to a horizontal plane, the internal drainage flow passage communicating with the space to be filtered.

3. The coalescing filter element arrangement according to claim 1, wherein the filter element comprises: the coalescence layer and the liquid drainage layer are sequentially sleeved in the coalescence space, the aperture of the coalescence layer is smaller than that of the liquid drainage layer, the coalescence layer is provided with a lyophobic channel with lyophobic property, and the liquid drainage layer is provided with a lyophilic channel with lyophilic property;

liquid drops in the gas can be conveyed to the liquid drainage layer along the liquid dredging channel after being gathered by the gathering layer, partial liquid drops conveyed to the liquid drainage layer under the driving of the gas flow can be discharged to the outside of the filter element through the pores of the liquid drainage layer, and partial liquid drops can flow along the lyophilic channel.

4. The coalescing filter element assembly according to claim 3, wherein the lyophobic passage comprises a plurality of lyophobic passages spaced apart from each other, the lyophobic passages extending in a direction having a predetermined inclination angle with respect to a horizontal plane, and liquid droplets carried in the gas can be transported to the drainage layer at the predetermined inclination angle.

5. The coalescing filter element arrangement according to claim 4, wherein the predetermined angle of inclination is between 30 ° and 60 °.

6. The coalescing filter element assembly according to claim 3, wherein the lyophilic passage has a plurality of lyophilic passages spaced apart from each other, the lyophilic passages extending in a direction perpendicular to a horizontal direction, and a portion of the liquid droplets transported to the drainage layer can flow downward through the lyophilic passages.

7. The coalescing filter element structure according to claim 6, wherein the lyophilic channel is a nanofiber membrane, the nanofiber membrane is composited on the drainage layer to form the lyophilic channel, and the diameter of the nanofiber membrane is 0.1-0.5 μm.

8. The coalescing filter element assembly according to claim 1, wherein the upper end cap is provided with a groove for mating with a top end of the first inner frame, and the lower end cap is threadably connected to a bottom end of the first inner frame.

9. The coalescing filter element structure of claim 1, wherein the pre-filter layer has a fiber diameter of 2-15 μ ι η and the collection layer has a fiber diameter of 15-25 μ ι η.

10. A filter device having a housing with a hollow cavity, the housing provided with an exhaust duct and an intake duct, comprising:

a coalescing filter element structure disposed within the hollow cavity, a drainage space being formed between the coalescing filter element structure and the housing;

the first liquid discharge pipeline is communicated with the liquid discharge space;

wherein the coalescing filter element arrangement comprises: a first inner frame, first inner frame has relative top and bottom, be provided with on the bottom: the first inner framework is arranged to surround to form a space to be filtered, the space to be filtered is communicated with the air inlet, and the air inlet is communicated with the air inlet pipeline; the first inner framework is sequentially sleeved with: a pre-filtering layer for filtering impurities and a liquid collecting layer for capturing liquid drops; a second inner framework sleeved outside the liquid collecting layer, wherein a gap space is formed between the liquid collecting layer and the second inner framework and is communicated with the internal liquid drainage flow channel; the outer framework is sleeved outside the second inner framework, and a coalescence space is formed between the second inner framework and the outer framework; a filter element disposed within the coalescing space; the upper end cover is arranged at the top end of the outer framework and at least plugs the end part of the space to be filtered; the lower end cover is arranged at the bottom end of the outer framework, is provided with an opening for inserting the first inner framework, and is detachably connected with the bottom end of the first inner framework;

a second drain line in communication with the internal drain runner;

and the pressure detection unit is used for detecting the pressure parameter of the coalescence filter element structure and is arranged on the exhaust pipeline and the air inlet pipeline.

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