A filtration media material for aviation jet fuel
By introducing a synthetic fiber spacer layer into the filter media material for aviation jet fuel, the problem of insufficient dirt holding capacity is solved, achieving high-efficiency filtration and long service life of the filter media material, and reducing the frequency and cost of filter element replacement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 中国航空油料有限责任公司
- Filing Date
- 2023-12-29
- Publication Date
- 2026-07-21
AI Technical Summary
Existing aviation jet fuel filter media materials have limited dirt-holding capacity, resulting in short filter element lifespan, high cost, and difficulty in increasing dirt-holding capacity while maintaining filtration accuracy.
The filter adopts a multi-layer structure consisting of a first glass fiber layer, a synthetic fiber spacer layer, and a second glass fiber layer. The synthetic fiber spacer layer is located between the two glass fiber layers, forming multiple through holes and pore walls, which increases the dirt storage space and supports and protects the glass fiber layer, thereby improving the dirt holding capacity of the filter medium.
While maintaining the same filtration accuracy, the dirt holding capacity has been increased by 2 times, extending the service life of the filter element and reducing the cost of filter element consumption.
Smart Images
Figure CN117753118B_ABST
Abstract
Description
Technical Field
[0001] This disclosure pertains to the field of aviation jet fuel purification and filtration technology, specifically relating to a filter medium material for aviation jet fuel. Background Technology
[0002] As the primary power source for aircraft, the quality of aviation jet fuel directly affects flight safety. During refining and storage, aviation jet fuel can become contaminated with moisture and impurities to varying degrees. Solid impurities can cause pump wear, control valve jamming, oil filter clogging, and nozzle erosion. These issues can range from minor wear and reduced engine lifespan to severe engine shutdown. Therefore, solid impurities must be removed from aviation jet fuel before use to achieve a cleanliness standard (i.e., a solid particulate contaminant content of no more than 1.0 mg / L).
[0003] In actual operation, solid impurities in aviation jet fuel are mainly removed through the synergistic action of three types of filters: coarse filters, pre-filters, and filter separators. Coarse filters primarily remove large mechanical particles larger than 614 micrometers. Pre-filters mainly remove solid particles larger than 5 micrometers, with filtration precisions of 10 micrometers, 5 micrometers, 3 micrometers, 2 micrometers, and 1 micrometer. The primary filter element in the filter separator typically has a filtration precision of 1 micrometer, used to remove small-diameter particles. Generally speaking, the higher the filtration precision, the higher the filtration efficiency, but the lower the dirt-holding capacity.
[0004] Currently, in the process of transporting aviation jet fuel, especially during the initial operation of pipelines and in aviation jet fuel transported by sea, the high impurity content in the jet fuel means that even though the pre-filter cartridges are selected with a 10-micron filtration precision, their limited dirt-holding capacity causes them to fail quickly. Timely replacement of the cartridges is necessary to effectively ensure the quality of the jet fuel.
[0005] As a crucial component of the filter element, the filter media material is key to determining the filter element's filtration accuracy and dirt-holding capacity. Existing oil filter paper generally consists of a dirt-holding layer, a fine filtration layer, and a protective layer. CN 1058440 A discloses an oil filter paper in which the dirt-holding layer is made of softwood pulp and glass fiber or wood pulp, cotton pulp, and synthetic fiber; the fine filtration layer consists of ceramic fiber or glass fiber and optional cotton fiber; and the protective layer is made of wood pulp and cotton pulp. While this multi-layered composite structure addresses the contradiction between high accuracy and large dirt-holding capacity to some extent, its dirt-holding capacity is only 60 g / m³. 2 Its capacity to hold pollutants is limited.
[0006] Therefore, by researching and developing new aviation jet fuel filter media materials, while maintaining the same filtration accuracy, the dirt holding capacity can be increased, which can effectively improve the service life of the filter element and save filter element consumption costs, which is of great practical significance. Summary of the Invention
[0007] The present disclosure aims to at least solve one of the technical problems existing in the prior art, and to provide a filter medium material for aviation jet fuel.
[0008] This disclosure provides a filter medium material for aviation jet fuel, including...
[0009] A first glass fiber layer, a synthetic fiber spacer layer, a second glass fiber layer, and a cellulose fiber layer are stacked sequentially.
[0010] The first glass fiber layer has a first average pore size, and the second glass fiber layer has a second average pore size, wherein the first average pore size is larger than the second average pore size; wherein...
[0011] The synthetic fiber spacer layer includes multiple through holes and hole walls, and the diameter of each through hole ranges from 1 mesh to 20 mesh.
[0012] Optionally, the synthetic fiber spacer layer is a spatial mesh structure made of aramid fibers through cross-weaving.
[0013] Optionally, the diameter of the aramid fiber ranges from 10 μm to 20 μm; the basis weight of the aramid fiber ranges from 10 g / m². 2 ~25g / m 2 .
[0014] Optionally, the first glass fiber layer is formed using a wet forming process with glass fibers having a diameter range of 0.3 μm to 10.0 μm.
[0015] Optionally, the thickness of the first glass fiber layer ranges from 0.1 mm to 1.0 mm;
[0016] The first average pore size ranges from 30 μm to 80 μm;
[0017] The air permeability of the first glass fiber layer is in the range of 100 mm / s to 300 mm / s;
[0018] The basis weight of the first glass fiber layer is 50 g / m². 2 ~90g / m 2 .
[0019] Optionally, the second glass fiber layer is formed using a wet forming process with glass fibers having a diameter range of 0.1 μm to 3.0 μm.
[0020] Optionally, the thickness of the second glass fiber layer ranges from 0.1 mm to 1.0 mm;
[0021] The second average pore size ranges from 5 μm to 10 μm;
[0022] The air permeability of the second glass fiber layer ranges from 70 mm / s to 150 mm / s;
[0023] The basis weight of the second glass fiber layer is 60 g / m². 2 ~120g / m 2 .
[0024] Optionally, the thickness of the cellulose fiber layer ranges from 0.1 mm to 1.0 mm;
[0025] The average pore size of the cellulose fiber layer ranges from 50 μm to 80 μm;
[0026] The air permeability of the cellulose fiber layer is in the range of 110 mm / s to 200 mm / s;
[0027] The basis weight of the cellulose fiber layer is 60 g / m³. 2 ~120g / m 2 .
[0028] Optionally, the cellulose fiber layer is treated with phenolic resin impregnation, with the amount of resin ranging from 5wt% to 0.5wt%.
[0029] The cellulose fiber layer is composed of cork fibers.
[0030] Optionally, the amount of adhesive applied to the first glass fiber layer and the second glass fiber layer ranges from 5 wt% ± 0.5 wt%.
[0031] The filter media material for aviation jet fuel disclosed in this embodiment uses high-density glass fiber layers, resulting in large pore sizes, high porosity, and low initial resistance, thus creating a contaminant storage space. The second glass fiber layer uses low-density fibers, resulting in smaller pore sizes, which can intercept more small particulate contaminants that penetrate the surface layer and reach the inner layers, thereby ensuring sufficient filtration accuracy. The cellulose fiber layer has high porosity and primarily serves a structural protection function. A synthetic fiber spacer layer is located between the first and second glass fiber layers, forming a mesh structure with multiple through-holes and pore walls. The pore size ranges from 1 mesh to 20 mesh, effectively increasing the contaminant storage space and supporting and protecting the glass fiber layers, improving the pleating performance of the filter media material.
[0032] The filter media material for aviation jet fuel disclosed in this embodiment significantly increases the dirt-holding capacity of the filter media material for aviation jet fuel while maintaining the same filtration accuracy. Its dirt-holding capacity is approximately twice that of the prior art, effectively balancing the conflicting relationship between filtration accuracy and dirt-holding capacity. Using the filter media material of this embodiment can effectively improve the service life of filter elements and save on filter element consumption costs, which is of great practical significance. Attached Figure Description
[0033] Figure 1 This is a schematic diagram of the structure of a filter medium material for aviation jet fuel in an embodiment of this disclosure;
[0034] Figure 2 This is a schematic diagram of the structure of the synthetic fiber spacer layer in an embodiment of this disclosure. Detailed Implementation
[0035] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0036] like Figure 1 and Figure 2 As shown, this embodiment of the present disclosure provides a filter media material 100 for aviation jet fuel, comprising a first glass fiber layer 110, a synthetic fiber spacer layer 120, a second glass fiber layer 130, and a cellulose fiber layer 140 stacked sequentially. The first glass fiber layer 110 has a first average pore size, and the second glass fiber layer 130 has a second average pore size, the first average pore size being larger than the second average pore size. That is, the synthetic fiber spacer layer 120 is sandwiched between the first glass fiber layer 110 and the second glass fiber layer 130. The synthetic fiber spacer layer 120 includes a plurality of through holes 121 and pore walls 122. Each through hole 121 has a pore wall 122. The pore size of each through hole ranges from 1 mesh to 20 mesh. The thickness of the pore wall 122 ranges from 0.3 mm to 0.7 mm, and the pore wall 122 serves to support and protect the glass fiber layers. Figure 2 As shown, the cross-section of each through hole 121 is hexagonal. The shape of the through hole 121 is not specifically limited in this embodiment. For example, it can also be circular, etc., and can be selected according to actual needs.
[0037] The filter media material for aviation jet fuel disclosed in this embodiment uses high-density fibers in the first glass fiber layer, resulting in large pores, high porosity, and low initial resistance, thus forming a contaminant storage space. The second glass fiber layer uses low-density fibers, resulting in smaller pores, which can intercept more small particulate contaminants that penetrate the surface and reach the inner layers, ensuring sufficient filtration accuracy. The cellulose fiber layer has high porosity and primarily serves a structural protection function. A synthetic fiber spacer layer is located between the first and second glass fiber layers, forming a mesh structure with multiple through-holes and pore walls. The pore size ranges from 1 mesh to 20 mesh, effectively increasing the contaminant storage space and supporting and protecting the glass fiber layers, improving the pleating performance of the filter media material. The filter media material for aviation jet fuel disclosed in this embodiment significantly increases the contaminant holding capacity while maintaining the same filtration accuracy, reaching approximately twice that of existing technologies, effectively balancing the conflict between filtration accuracy and contaminant holding capacity. Using the filter media material of this embodiment can effectively improve filter element lifespan and save on filter element consumption costs, which is of great practical significance.
[0038] The following describes in detail the filter media material for aviation jet fuel according to several embodiments:
[0039] Example 1
[0040] This embodiment provides a filter medium material 100 for aviation jet fuel, wherein the first glass fiber layer 110 in the filter medium is formed by a wet molding process using glass fibers with a diameter range of 0.3μm to 10.0μm.
[0041] The thickness of the first glass fiber layer 110 ranges from 0.6 mm ± 0.02 mm, the first average pore size is 40 μm, the air permeability is 260 mm / s, and the basis weight is 90 g / m³. 2 .
[0042] The second glass fiber layer 130 is formed using a wet molding process with glass fibers ranging from 0.1 μm to 3.0 μm in diameter.
[0043] The second glass fiber layer has a thickness ranging from 0.4 mm ± 0.02 mm, a second average pore size of 10 μm, an air permeability of 120 mm / s, and a basis weight of 70 g / m³. 2 .
[0044] The cellulose fiber layer 140 has a thickness ranging from 0.5 mm to 0.02 mm, an average pore size of 60 μm, an air permeability of 180 mm / s, and a basis weight of 80 g / m². It is treated with phenolic resin impregnation, with the resin application amount controlled at 5 wt% ± 0.5 wt%. The cellulose fiber layer is mainly composed of cork fibers.
[0045] Synthetic fiber spacer layer 120 is a spatial mesh structure made of aramid fibers through cross-weaving, wherein the diameter of the aramid fibers ranges from 10μm to 20μm and the basis weight is 25g / m². 2 .
[0046] The pore size of the synthetic fiber spacer mesh 120 is 1 mesh.
[0047] The amount of adhesive applied to the first glass fiber layer 110 and the second glass fiber layer 130 is controlled at 5wt% ± 0.5wt%.
[0048] Example 2
[0049] This embodiment provides a filter medium material 100 for aviation jet fuel, wherein the first glass fiber layer 110 in the filter medium is formed by a wet molding process using glass fibers with a diameter range of 0.3μm to 10.0μm.
[0050] The first glass fiber layer 110 has a thickness ranging from 0.6 mm ± 0.02 mm, a first average pore size of 40 μm, an air permeability of 260 mm / s, and a basis weight of 90 g / m³. 2 .
[0051] The second glass fiber layer 130 is formed using a wet molding process with glass fibers ranging from 0.1 μm to 3.0 μm in diameter.
[0052] The second glass fiber layer 130 has a thickness ranging from 0.4 mm ± 0.02 mm, a second average pore size of 10 μm, an air permeability of 120 mm / s, and a basis weight of 70 g / m³. 2 .
[0053] The cellulose fiber layer 140 has a thickness ranging from 0.5 mm ± 0.02 mm, an average pore size of 60 μm, an air permeability of 180 mm / s, and a basis weight of 80 g / m³. 2 It is then impregnated with phenolic resin, with the amount of resin controlled at 5wt% ± 0.5wt%. The cellulose fiber layer 140 is mainly composed of cork fibers.
[0054] Synthetic fiber spacer layer 120 is a spatial mesh structure made of aramid fibers through cross-weaving, wherein the diameter of the aramid fibers ranges from 10μm to 20μm and the basis weight is 25g / m². 2 .
[0055] The synthetic fiber spacer mesh 120 has a pore size of 20 mesh.
[0056] The amount of adhesive applied to the first glass fiber layer 110 and the second glass fiber layer 130 is controlled at 5wt% ± 0.5wt%.
[0057] Example 3
[0058] This embodiment provides a filter medium material 100 for aviation jet fuel, wherein the first glass fiber layer 110 in the filter medium is formed by a wet molding process using glass fibers with a diameter range of 0.3μm to 10.0μm.
[0059] The first glass fiber layer 110 has a thickness ranging from 0.6 mm ± 0.02 mm, a first average pore size of 80 μm, an air permeability of 290 mm / s, and a basis weight of 70 g / m³. 2 .
[0060] The second glass fiber layer 130 is formed using a wet molding process with glass fibers ranging from 0.1 μm to 3.0 μm in diameter.
[0061] The second glass fiber layer 130 has a thickness ranging from 0.4 mm ± 0.02 mm, a second average pore size of 5 μm, an air permeability of 120 mm / s, and a basis weight of 80 g / m³. 2 .
[0062] The cellulose fiber layer 140 has a thickness ranging from 0.5 mm ± 0.02 mm, an average pore size of 60 μm, an air permeability of 180 mm / s, and a basis weight of 80 g / m³. 2 It is then impregnated with phenolic resin, with the amount of resin controlled at 5wt% ± 0.5wt%. The cellulose fiber layer 140 is mainly composed of cork fibers.
[0063] Synthetic fiber spacer layer 120 is a spatial mesh structure made of aramid fibers through cross-weaving, wherein the diameter of the aramid fibers ranges from 10μm to 20μm and the basis weight is 25g / m². 2 .
[0064] The pore size of the synthetic fiber spacer mesh is 1 mesh.
[0065] The amount of adhesive applied to the first glass fiber layer 110 and the second glass fiber layer 130 is controlled at 5wt% ± 0.5wt%.
[0066] Compare with Example 1
[0067] The main difference between Comparative Example 1 and Example 1 is the absence of synthetic fiber spacers.
[0068] The first glass fiber layer 110 is formed using a wet forming process with glass fibers having a diameter range of 0.3 μm to 10.0 μm.
[0069] The first glass fiber layer 110 has a thickness ranging from 0.6 mm ± 0.02 mm, a first average pore size of 40 μm, an air permeability of 260 mm / s, and a basis weight of 90 g / m³. 2 .
[0070] The second glass fiber layer 130 is formed using a wet molding process with glass fibers ranging from 0.1 μm to 3.0 μm in diameter.
[0071] The second glass fiber layer 130 has a thickness ranging from 0.4 mm ± 0.02 mm, a second average pore size of 10 μm, an air permeability of 120 mm / s, and a basis weight of 70 g / m³. 2 .
[0072] The cellulose fiber layer 140 has a thickness ranging from 0.5 mm ± 0.02 mm, an average pore size of 60 μm, an air permeability of 180 mm / s, and a basis weight of 80 g / m³. 2 It is then impregnated with phenolic resin, with the amount of resin controlled at 5wt% ± 0.5wt%. The cellulose fiber layer 140 is mainly composed of cork fibers.
[0073] The amount of adhesive applied to the first glass fiber layer 110 and the second glass fiber layer 130 is controlled at 5wt% ± 0.5wt%.
[0074] The performance of the filter media materials for aviation jet fuel in Examples 1, 2, 3, and Comparative Example 1 was tested, and the test results are shown in Table 1. The test conditions were as follows: Referring to standard ISO 16889, a DT-100Z multi-pass test bench was used, with a PAMAS2132 particle counter. Multi-pass test conditions: test flow rate: 5 L / min, sludge injection flow rate: 0.1 L / min, termination pressure difference: 300 kPa, test area: 200 cm². 2 Pollutant: ISO 12103-A3.
[0075] Table 1 Performance Test Data of Filter Media Materials for Aviation Jet Fuel
[0076] Filtration accuracy μm Filtration ratio β Initial resistance kPa <![CDATA[Pollution holding capacity g / m 2 > Example 1 10 210 38 110.65 Example 2 10 215 46 76.32 Example 3 10 197 43 86.54 Compare with Example 1 10 195 34 70.56
[0077] As shown in Table 1, synthetic fiber spacer mesh 120 was used in all three examples. The dirt-holding capacity of the filter media materials for aviation jet fuel in all three examples was greater than that in Control Example 1, and the filtration ratio was also greater than that in Control Example 1. Therefore, it can be seen that the filter media material for aviation jet fuel with synthetic fiber spacer mesh 120 has a better dirt-holding capacity and can effectively balance the contradictory relationship between filtration accuracy and dirt-holding capacity.
[0078] As shown in Table 1, the dirt-holding capacity in Example 1 is greater than that in Example 2. The pore size of the synthetic fiber spacer mesh layer 120 in Example 1 is 1 mesh, while the pore size of the synthetic fiber spacer mesh layer 120 in Example 2 is 20 mesh. The parameters of other layers are the same. It can be seen that the larger the pore size of the synthetic fiber spacer mesh layer 120, the larger the dirt-holding space and the greater the dirt-holding capacity.
[0079] As shown in Table 1, Example 1 has the largest dirt-holding capacity, which is 110.65 g / m³. 2 Its dirt-holding capacity is approximately twice that of existing technologies. The use of the aviation jet fuel filter media material in this embodiment significantly improves the dirt-holding capacity of the aviation jet fuel filter media material, effectively extending the filter element's service life and saving filter element consumption costs.
[0080] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the embodiments of this disclosure, and the embodiments of this disclosure are not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the embodiments of this disclosure, and these modifications and improvements are also considered to be within the protection scope of the embodiments of this disclosure.
Claims
1. A filter medium material for aviation jet fuel, characterized in that, It includes a first glass fiber layer, a synthetic fiber spacer layer, a second glass fiber layer, and a cellulose fiber layer stacked sequentially; The first glass fiber layer has a first average pore size, and the second glass fiber layer has a second average pore size, wherein the first average pore size is larger than the second average pore size; wherein, the first glass fiber layer uses high-density fibers, resulting in large pores between the fibers, high porosity, and low initial resistance, thereby forming a dirt-collecting space; the second glass fiber layer uses low-density fibers, resulting in smaller pores between the fibers, which can intercept more small particulate pollutants that penetrate through the surface to reach the inner layer, thereby ensuring that the filter medium has sufficient filtration accuracy; The synthetic fiber spacer layer includes multiple through holes and hole walls, and the pore size of each through hole ranges from 1 mesh to 20 mesh. The synthetic fiber spacer layer is used to increase the dirt storage space, support and protect the glass fiber layer, and improve the pleating performance of the filter media material. The synthetic fiber spacer layer is a spatial mesh structure made of aramid fibers through cross-weaving. The thickness of the first glass fiber layer ranges from 0.1 mm to 1.0 mm; The first average pore size ranges from 30 μm to 80 μm; The air permeability of the first glass fiber layer ranges from 100 mm / s to 300 mm / s; The basis weight of the first glass fiber layer is 50 g / m². 2 ~90g / m 2 .
2. The filter media material for aviation jet fuel according to claim 1, characterized in that, The diameter of the aramid fiber ranges from 10 μm to 20 μm; the basis weight of the aramid fiber ranges from 10 g / m². 2 ~25g / m 2 .
3. The filter media material for aviation jet fuel according to claim 1, characterized in that, The first glass fiber layer is formed using a wet forming process with glass fibers having a diameter range of 0.3μm to 10.0μm.
4. The filter media material for aviation jet fuel according to any one of claims 1 to 3, characterized in that, The second glass fiber layer is formed using a wet forming process with glass fibers having a diameter range of 0.1μm to 3.0μm.
5. The filter media material for aviation jet fuel according to claim 4, characterized in that, The thickness of the second glass fiber layer ranges from 0.1 mm to 1.0 mm; The second average pore size ranges from 5 μm to 10 μm; The air permeability of the second glass fiber layer ranges from 70 mm / s to 150 mm / s; The basis weight of the second glass fiber layer is 60 g / m². 2 ~120g / m 2 .
6. The filter media material for aviation jet fuel according to any one of claims 1 to 3, characterized in that, The thickness of the cellulose fiber layer ranges from 0.1 mm to 1.0 mm; The average pore size of the cellulose fiber layer ranges from 50 μm to 80 μm; The air permeability of the cellulose fiber layer is in the range of 110 mm / s to 200 mm / s; The basis weight of the cellulose fiber layer is 60 g / m³. 2 ~120g / m 2 .
7. The filter media material for aviation jet fuel according to claim 6, characterized in that, The cellulose fiber layer is treated with phenolic resin impregnation, with the resin application amount ranging from 5wt% ± 0.5wt%. The cellulose fiber layer is composed of cork fibers.
8. The filter media material for aviation jet fuel according to any one of claims 1 to 3, characterized in that, The amount of adhesive applied to the first glass fiber layer and the second glass fiber layer ranges from 5wt% to 0.5wt%.