CN114950031A - Directional liquid guiding type gas-liquid separation filter element and working method thereof - Google Patents
Directional liquid guiding type gas-liquid separation filter element and working method thereof Download PDFInfo
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- CN114950031A CN114950031A CN202210608834.5A CN202210608834A CN114950031A CN 114950031 A CN114950031 A CN 114950031A CN 202210608834 A CN202210608834 A CN 202210608834A CN 114950031 A CN114950031 A CN 114950031A
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- 239000007788 liquid Substances 0.000 title claims abstract description 143
- 238000000926 separation method Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000011148 porous material Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 16
- 230000002209 hydrophobic effect Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 239000002657 fibrous material Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 113
- 239000007789 gas Substances 0.000 description 5
- 239000003365 glass fiber Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/003—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid
- B01D46/0031—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid with collecting, draining means
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention provides a directional liquid guide type gas-liquid separation filter element and a working method thereof, belonging to the field of filter elements and comprising a cylindrical framework, a filter layer sleeved on the outer wall of the framework, a directional liquid guide layer sleeved outside the filter layer and forming a laminated structure with the filter layer, an interception layer sleeved outside the directional liquid guide layer and forming a laminated structure with the directional liquid guide layer, top and bottom end covers covering the two end parts of the framework, the filter layer, the directional liquid guide layer and the interception layer, and a sealing element hermetically arranged at the end part of the framework, wherein the filter layer is used for performing filtering operation on an object to be filtered which passes through the cylindrical cavity of the framework, the directional liquid guide layer is used for directionally guiding the liquid collected by filtering of the filter layer so as to be converged towards the bottom end cover, and the interception layer is used for preventing the collected liquid from forming small liquid drops again and returning to the gas. The invention also provides a working method of the filter element. The filter element and the working method can reduce the obstruction of liquid to air flow, thereby reducing the working resistance of the filter element.
Description
Technical Field
The invention belongs to the field of filter elements, and particularly relates to a directional liquid guiding type gas-liquid separation filter element and a working method thereof.
Background
In the process of gas transportation, use and treatment, a large amount of liquid pollutants such as oil, water and the like are inevitably entrained. If the liquid pollutants are not treated timely, the problems of pipeline corrosion, increased energy consumption for conveying, damage of pneumatic elements, air pollution and the like can be caused. Therefore, gas-liquid separation is an indispensable loop in natural gas delivery systems, compressed air systems and oil-containing waste gas purification systems.
The gas-liquid separation filter element is a common element for gas-liquid separation. Conventional gas-liquid separation filter core is at the operation in-process, and liquid adsorbs in filtering material easily, hinders the gas circulation to lead to the filter core resistance to rise, reduced filter core life, improved system's energy consumption.
Therefore, a novel directional liquid guiding type gas-liquid separation filter element needs to be developed, which is beneficial to unidirectional liquid flow, can reduce the resistance of the filter element and prolong the service life of the filter element.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a directional liquid guiding type gas-liquid separation filter element and a working method thereof.
In order to achieve the purpose, the invention provides a directional liquid guiding type gas-liquid separation filter element, which comprises a cylindrical framework, a filter layer sleeved on the outer wall of the framework, a directional liquid guiding layer sleeved outside the filter layer and forming a laminated structure with the filter layer, an interception layer sleeved outside the directional liquid guiding layer and forming a laminated structure with the directional liquid guiding layer, a top end cover and a bottom end cover which cover the two end parts formed by the framework, the filter layer, the directional liquid guiding layer and the interception layer into a whole, and a sealing element which is hermetically arranged at the end part of the framework and is overlapped with the bottom end cover,
the filter layer is used for performing filtering operation on an object to be filtered which penetrates through the skeleton cylindrical cavity, the directional liquid guide layer is used for directionally guiding liquid collected through filtering of the filter layer to converge towards the direction of the bottom end cover, and the intercepting layer is used for preventing the collected liquid from forming small liquid drops again and returning to gas.
Further, the filter layer is made of hydrophilic or/and lipophilic fiber materials. Preferably, the filter layer is a fiber mat made of surface-treated hydrophilic or/and oleophilic glass fibers.
Further, the directional liquid guiding layer has a gradually decreasing gradient change in affinity for liquid along the direction of the air flow of the object to be filtered.
Furthermore, the hydrophilicity and lipophilicity of the directional liquid guiding layer along the airflow direction of the object to be filtered are gradually weakened, the surface tension of the directional liquid guiding layer to water and oil is changed from small to large along the airflow direction of the object to be filtered, the surface tension to water is changed from 20 +/-3 mN/m to 50 +/-2 mN/m and finally reaches 70 +/-2 mN/m, the surface tension to oil is changed from 20 +/-3 mN/m to 30 +/-1 mN/m and finally reaches 33 +/-1 mN/m along the airflow direction of the object to be filtered.
Furthermore, the pores of the directional liquid guiding layer along the airflow direction of the object to be filtered are changed from small to large.
Further, the pore space of the directional liquid guiding layer along the airflow direction of the object to be filtered is transited from 5 +/-1 μm to 10 +/-1 μm, and finally reaches 20 +/-2 μm.
Furthermore, the interception layer is made of double-layer oleophobic or/and hydrophobic porous materials with a loose inner layer and a fine outer layer, and a gap is formed between the two layers to form a hollow liquid drainage structure.
Furthermore, the interception layer is made of double-layer oleophobic or/and hydrophobic porous materials with loose inner layers and fine outer layers, and loose materials with larger pores are arranged between the two layers to serve as isolation layers.
According to the second aspect of the invention, the method for operating the directional liquid guiding type gas-liquid separation filter element comprises the steps that firstly, an object to be filtered enters the filter element through the framework, is separated by the filter layer, then passes through the directional liquid guiding layer under the power of airflow and is coalesced into larger liquid drops, then, the liquid drops are gathered in the intercepting layer, specifically, the liquid flows downstream to the bottom under the action of gravity after passing through the inner layer material of the intercepting layer and reaches the liquid discharging port arranged on the bottom end cover, the outer layer material of the intercepting layer intercepts the liquid drops which enter the airflow again, the liquid is prevented from being mixed into gas for the second time, and finally, the accumulated liquid at the liquid discharging port of the bottom end cover can be uniformly discharged to a designated position through the pipeline.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
the invention overcomes the defect that the surface of the traditional gas-liquid separation filter element is easy to adsorb oil, designs the directional guide flow layer which is beneficial to the unidirectional flow of liquid and the interception layer which can avoid the liquid from adsorbing again, reduces the resistance of the filter element and prolongs the service life of the filter element. Specifically, the phenomenon that excessive liquid is absorbed inside the filtering material is avoided, and the working resistance of the filter element is effectively reduced, so that the power requirement and the energy consumption of the system are reduced. Because the working resistance of the filter element is reduced, the time for the filter element to reach the replacement resistance is prolonged on the premise of not changing the requirement of the system on the filter element replacement resistance, thereby prolonging the service life of the filter element and reducing the system maintenance frequency. And moreover, because the oil adsorbed by the filter element is reduced, the loss of the oil in the system is reduced.
Drawings
Fig. 1 is a schematic sectional view in a front view direction of a directional liquid-guiding type gas-liquid separation filter element structure provided by an embodiment of the invention.
Wherein like reference numerals refer to like structures or elements throughout and, in particular,
1 filter layer 2 directional liquid guide layer 3 interception layer
4 skeleton 5 bottom end cover 6 sealing element
7 Top end cover
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The directional flow guide type gas-liquid separation filter element can be used for gas-liquid separation of a natural gas conveying system, a compressed air system and an oil-containing waste gas purification system, and comprises a cylindrical framework as a support body of the whole filter element structure in structural design. The filter element further comprises a filter layer sleeved on the outer wall of the framework, a directional liquid guide layer sleeved outside the filter layer and forming a laminated structure with the filter layer, an interception layer sleeved outside the directional liquid guide layer and forming a laminated structure with the directional liquid guide layer, a top end cover and a bottom end cover which are covered at two end parts of the framework, the filter layer, the directional liquid guide layer and the interception layer, and a sealing element which is arranged at the end part of the framework in a sealing mode and is laminated with the bottom end cover. The filter layer is used for performing filtering operation on an object to be filtered which penetrates through the framework cylindrical cavity, the directional liquid guide layer is used for directionally guiding liquid collected through filtering of the filter layer to converge towards the bottom end cover, and the intercepting layer is used for preventing the collected liquid from forming small liquid drops again and returning to gas. The invention designs the filter layer, the directional liquid guide layer and the interception layer, and the three layers are reasonably distributed, respectively play their roles, are mutually matched and have the reverse osmosis function.
In engineering practice, the filter layer is made of hydrophilic or/and oleophilic fiber materials. Preferably, the filter layer is a fiber mat made of surface-treated hydrophilic or/and oleophilic glass fibers. The directional liquid guiding layer has gradually reduced gradient change to the liquid along the airflow direction of the object to be filtered. The hydrophilicity and lipophilicity of the directional liquid guiding layer along the airflow direction of the object to be filtered are gradually weakened, the surface tension of the directional liquid guiding layer to water and oil is increased from small to large along the airflow direction of the object to be filtered, the surface tension to water is transited from 20 +/-3 mN/m to 50 +/-2 mN/m along the airflow direction of the object to be filtered and finally reaches 70 +/-2 mN/m, the surface tension to oil is transited from 20 +/-3 mN/m to 30 +/-1 mN/m along the airflow direction of the object to be filtered and finally reaches 33 +/-1 mN/m. The pores of the directional liquid guiding layer along the airflow direction of the object to be filtered are changed from small to large, specifically, the pores are changed from 5 +/-1 mu m to 10 +/-1 mu m, and finally reach 20 +/-2 mu m. The interception layer is made of double-layer oleophobic or/and hydrophobic porous materials with a loose inner layer and a fine outer layer, and a gap is formed between the two layers to form a hollow liquid drainage structure. Or the interception layer is made of double-layer oleophobic or/and hydrophobic porous materials with loose inner layers and fine outer layers, and loose materials with larger pores are arranged between the two layers to serve as isolation layers.
Fig. 1 is a schematic sectional view in a front view direction of a directional liquid guiding type gas-liquid separation filter element structure provided in an embodiment of the present invention, and as can be seen from the figure, the gas-liquid separation filter element includes a filter layer 1, a directional liquid guiding layer 2, an interception layer 3, a framework 4, a bottom end cover 5, a sealing element 6, and a top end cover 7. The top end cover 7 is a closed end cover with a mounting hole, and a pull rod type mounting mode is adopted during application.
In the embodiment, the filter layer adopts oleophilic/hydrophilic porous filter materials, and the gas-liquid separation is realized by utilizing the coalescence-separation principle. In this embodiment, the filter layer is preferably an oleophilic type glass fiber filter. The directional liquid guide layer adopts a porous material with gradient change of liquid affinity characteristics (weakening along the airflow direction) and gradient distribution of body porosity (changing from dense to sparse along the airflow direction), and liquid is guided to flow from the filter layer to the interception layer in a directional mode. In this embodiment, preferably, the filtering layer is a multi-layer composite glass fiber filtering material specially treated with a surfactant.
The interception layer adopts a hollow liquid discharge structure formed by double-layer oleophobic/hydrophobic porous materials with inner layers and outer layers being sparse and dense or adopts a design that a netted loose structure interlayer is arranged in the double-layer oleophobic/hydrophobic porous materials (in actual engineering practice, the netted loose structure is a copper net or a stainless steel net with the surface being fluorinated), and liquid flows downstream to the bottom under the action of gravity after passing through the first layer of material and is discharged from a liquid discharge port. In this embodiment, preferably, the filtering layer adopts two layers of oleophobic glass fiber filter materials, and a polyester mesh pad is sandwiched between the two layers for separation.
The filter layer, the directional flow guide layer and the interception layer filter material are combined in sequence to realize the gas-liquid separation of the directional flow guide of the oil liquid. The filter element end cover and the framework support the filter layer, the directional liquid guide layer and the interception layer, the inner ring of the bottom end cover is higher than the outer ring to prevent liquid from flowing backwards, and the outer ring is provided with a liquid discharge port to uniformly discharge accumulated liquid to the collection device.
The invention also provides a working method of the directional liquid guide type gas-liquid separation filter element, which comprises the following steps:
firstly, an object to be filtered enters a filter element through a framework 4, is separated by a filter layer 1, passes through a directional liquid guide layer 2 under the air flow power and then is coalesced into larger liquid drops,
then, the liquid is converged at the interception layer 3, specifically, the liquid flows downstream to the bottom under the action of gravity after passing through the inner layer material of the interception layer and reaches a liquid discharge port arranged on a bottom end cover 5, the outer layer material of the interception layer intercepts liquid drops which reenter the air flow, the liquid is prevented from being mixed into the air for the second time,
finally, the accumulated liquid at the liquid discharge opening of the bottom end cover 5 can be uniformly discharged to a designated position through a pipeline.
The invention overcomes the defect that the surface of the traditional gas-liquid separation filter element is easy to adsorb oil, designs the directional guide flow layer which is beneficial to the unidirectional flow of liquid and the interception layer which can avoid the liquid from adsorbing again, reduces the resistance of the filter element and prolongs the service life of the filter element.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A directional liquid guiding type gas-liquid separation filter element is characterized by comprising a cylindrical framework (4), a filter layer (1) sleeved on the outer wall of the framework (4), a directional liquid guiding layer (2) sleeved outside the filter layer (1) and forming a laminated structure with the filter layer (1), an intercepting layer (3) sleeved outside the directional liquid guiding layer (2) and forming a laminated structure with the directional liquid guiding layer (2), a top end cover (7) and a bottom end cover (5) which cover the two end parts of the whole formed by the framework (4), the filter layer (1), the directional liquid guiding layer (2) and the intercepting layer (3), a sealing element (6) which is hermetically arranged at the end part of the framework (4) and is laminated with the bottom end cover (5),
the filter layer is used for performing filtering operation on an object to be filtered which penetrates through the cylindrical cavity of the framework (4), the directional liquid guide layer is used for directionally guiding liquid collected after being filtered by the filter layer (1) to converge towards the bottom end cover (5), and the interception layer (3) is used for preventing the collected liquid from forming small liquid drops again and returning to gas.
2. A directional liquid-guiding gas-liquid separation filter element according to claim 1, characterized in that the filter layer (1) is made of hydrophilic or/and oleophilic fiber material.
3. A directional liquid-guiding type gas-liquid separation filter element according to claim 1, wherein the directional liquid-guiding layer (2) has a gradually decreasing gradient in affinity for liquid along the direction of the gas flow of the object to be filtered.
4. A directional liquid-guiding type gas-liquid separation filter element according to claim 1, wherein the hydrophilicity and lipophilicity of the directional liquid-guiding layer (2) along the direction of the air flow of the object to be filtered gradually decrease, and the surface tension of the directional liquid-guiding layer to water and oil gradually increases along the direction of the air flow of the object to be filtered, and the surface tension to water is transited from 20 ± 3mN/m to 50 ± 2mN/m and finally to 70 ± 2mN/m along the direction of the air flow of the object to be filtered, and the surface tension to oil is transited from 20 ± 3mN/m to 30 ± 1mN/m and finally to 33 ± 1mN/m along the direction of the air flow of the object to be filtered.
5. A directional liquid guide type gas-liquid separation filter element according to claim 1, wherein the pores of the directional liquid guide layer along the direction of the gas flow of the object to be filtered are gradually enlarged.
6. A directional liquid-guiding type gas-liquid separation filter element according to claim 1, wherein the pores of the directional liquid-guiding layer along the gas flow direction of the object to be filtered are transited from 5 ± 1 μm to 10 ± 1 μm and finally reach 20 ± 2 μm.
7. The directional liquid guide type gas-liquid separation filter element as claimed in claim 1, wherein the interception layer (3) is made of double-layer oleophobic or/and hydrophobic porous materials with a loose inner layer and a fine outer layer, and a gap is formed between the two layers to form a hollow liquid discharge structure.
8. A directional liquid-guiding type gas-liquid separation filter element according to claim 1, characterized in that the interception layer (3) is made of double-layer oleophobic or/and hydrophobic porous material with loose inner layer and fine outer layer, and a loose material with larger pores is arranged between the two layers as an isolation layer.
9. A method of operating a directional liquid-guiding gas-liquid separation cartridge according to any one of claims 1-7,
firstly, an object to be filtered enters a filter element through a framework (4), is separated by a filter layer (1), passes through a directional liquid guide layer (2) under the air flow power and then is coalesced into larger liquid drops,
then, the larger liquid drops are gathered in the interception layer (3), specifically, the liquid flows downstream to the bottom under the action of gravity after passing through the inner layer material of the interception layer and reaches a liquid discharge port arranged on the bottom end cover (5), the outer layer material of the interception layer intercepts the liquid drops which enter the airflow again, the liquid is prevented from being mixed into the gas for the second time,
finally, the accumulated liquid at the liquid discharge port of the bottom end cover (5) can be uniformly discharged to a designated position through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210608834.5A CN114950031B (en) | 2022-05-31 | 2022-05-31 | Directional liquid-guiding type gas-liquid separation filter element and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210608834.5A CN114950031B (en) | 2022-05-31 | 2022-05-31 | Directional liquid-guiding type gas-liquid separation filter element and working method thereof |
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| Publication Number | Publication Date |
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| CN114950031A true CN114950031A (en) | 2022-08-30 |
| CN114950031B CN114950031B (en) | 2024-04-05 |
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| CN114950031B (en) | 2024-04-05 |
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