A filter element for high-pressure natural gas purification

Abstract

The present invention relates to a filter element for purifying high-pressure natural gas, comprising a filter element device and a magnetic separation chamber, wherein the filter element device comprises a first type of louver punching spiral skeleton, a second type of louver punching spiral skeleton and a filter element part; the filter element part comprises a first filter layer, a special-shaped fiber non-woven fabric, a first punching hole inner skeleton, a second filter layer and a second punching hole inner skeleton which are sequentially sleeved from the outside to the inside; the first type of louver punching spiral skeleton, the second type of louver punching spiral skeleton and the filter element part are sequentially detachably sleeved from the outside to the inside; first end covers are arranged on both sides of the first type of louver punching spiral skeleton and the second type of louver punching spiral skeleton, and a first gasket is arranged on one side of each first end cover; second end covers are arranged on both sides of the inner skeleton formed by the first punching hole inner skeleton and the second punching hole inner skeleton, and a second gasket is arranged on one side of each second end cover, and one side of the filter element device is detachably connected to the magnetic separation chamber, and the present invention can be widely used in the field of natural gas pipelines.

Description

Technical Field

[0001] The invention relates to the technical field of natural gas pipelines, in particular to a filter element for purifying high-pressure natural gas. Background Art

[0002] During the natural gas extraction, purification and compression process, magnetic solid dust (the presence of iron, ferroferric oxide and other magnetic solids caused by pipeline corrosion), heavy hydrocarbons, condensate, oil, free water and other liquids, especially when using reciprocating compressors or screw compressors, a large amount of lubricating oil mist is entrained into the pipeline, mixed with mechanical abrasion, pipeline corrosion and other impurities to form complex particulate impurities, which are entrained into the downstream process along with the gas, seriously affecting the safe and stable operation of the natural gas pipeline and key equipment.

[0003] Existing natural gas filter elements generally use surface filtration, and dust forms a dense filter cake on the inlet side of the filter material. Especially under abnormal conditions such as increased transmission, pipe cleaning, or sudden changes in upstream gas quality, the dust concentration in the pipeline increases suddenly in a short period of time, causing congestion in the natural gas filter element, and the filter pressure difference reaches or exceeds the design threshold. This phenomenon requires timely replacement of the filter element and cleaning of the filter before the design life of the filter element is reached. In extreme cases, dust congestion can cause the filter element to collapse and the sealing surface to fail, and particulate impurities can directly enter the downstream, causing abnormal shutdown of the downstream compressor, failure of metering instruments, valve erosion and other accidents.

[0004] The disadvantages of natural gas filter elements in the prior art include: 1) The existing filter elements are generally single-layer metal frames with generally low strength. Natural gas pipeline transportation has the characteristics of high operating pressure, large gas volume fluctuations, and high impurity concentration during the cleaning process. In extreme cases, the filter element is prone to collapse, resulting in filtration failure. 2) The existing filter element design is mainly aimed at single-phase impurities, and is generally divided into filter elements for filtering solid impurities and coalescing filter elements for filtering liquid impurities. Liquid and solid impurities are commonly present in natural gas pipelines. The solid-liquid phase is mixed and attached to the filter element, which is not conducive to droplet expulsion, the pressure difference rises rapidly, and the actual service life is shorter than the design life. Summary of the invention

[0005] In view of the above problems, the object of the present invention is to provide a filter element for purifying high-pressure natural gas with high filtering strength and long service life.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical scheme: Provide a filter element for high-pressure natural gas purification, including a filter element device and a magnetic separation chamber, wherein the filter element device includes a first type of louver punching spiral skeleton, a second type of louver punching spiral skeleton and a filter element part; the filter element part includes a first filter layer, a shaped fiber non-woven fabric, a first punching hole inner skeleton, a second filter layer and a second punching hole inner skeleton which are sequentially sleeved from the outside to the inside;

[0007] The first type of louver punching spiral skeleton, the second type of louver punching spiral skeleton and the filter element part are detachably arranged from the outside to the inside in sequence; both sides of the first type of louver punching spiral skeleton and the second type of louver punching spiral skeleton are provided with first end covers, and one side of each of the first end covers is provided with a first gasket; both sides of the inner skeleton formed by the first punching through hole inner skeleton and the second punching through hole inner skeleton are provided with second end covers, and one side of each of the second end covers is provided with a second gasket;

[0008] Located between the first type of blinds punching spiral skeleton and the second type of blinds punching spiral skeleton, the second type of blinds punching spiral skeleton is embedded with a plurality of spherical magnets for adsorbing magnetic impurities at intervals, the second type of blinds punching spiral skeleton is used for secondary filtration of dust, and the first filter layer is used for tertiary filtration of dust; the outer side of the first punching through hole inner skeleton is wrapped with the shaped fiber non-woven fabric for reducing the resistance of the filter element; the first punching through hole inner skeleton and the second punching through hole inner skeleton are used to enhance the strength of the filter element; the second filter layer is used for liquid coalescence to avoid secondary entrainment;

[0009] One side of the filter element device is detachably connected to the magnetic separation chamber for adsorbing magnetic particle impurities in the gas.

[0010] Further, the magnetic separation chamber includes a magnetic core, a corrugated adsorption groove, a magnetic core end cover and a magnetic core gasket;

[0011] The magnetic core and the corrugated adsorption groove are both barrel-shaped structures. The corrugated adsorption groove is arranged on the inner side of the magnetic core. The mass-containment space inside the magnetic core constitutes a magnetic separation cavity. The magnetic core end covers are arranged at both ends of the magnetic separation cavity. The magnetic core gasket is arranged on one side of each of the magnetic core end covers. The magnetic core is used to adsorb magnetic particle impurities in the gas, and the corrugated adsorption groove is used to increase the adsorption area.

[0012] Furthermore, the first type of blinds punching spiral skeleton, the second type of blinds punching spiral skeleton, the first punched through hole inner skeleton and the second punched through hole inner skeleton are all barrel-shaped structures, and the punching holes between the first type of blinds punching spiral skeleton and the second type of blinds punching spiral skeleton are staggered.

[0013] Furthermore, the first type of Venetian blinds punching spiral skeleton and the second type of Venetian blinds punching spiral skeleton are both obtained by first punching holes to form a Venetian blinds-like structure and then winding it into a barrel-shaped structure.

[0014] Furthermore, the punching shapes of the first type of blinds punching spiral skeleton are all groove-shaped, and there are openings on the sides of the grooves, and the opening directions are one row in the positive direction and one row in the reverse direction, and are continuously distributed;

[0015] The punching shapes of the second type of Venetian blinds punching spiral skeleton are all circular, and the punching spacing of the second type of Venetian blinds punching spiral skeleton is determined according to the magnetic force of the spherical magnet.

[0016] Furthermore, the first punched-through-hole inner frame and the second punched-through-hole inner frame both adopt a punched-through-hole structure.

[0017] Furthermore, the size of the second end cover on one side of the first punched hole inner skeleton and the second punched hole inner skeleton is smaller than the size of the second end cover on the other side, and the size of the first end cover on one side of the first type of blinds punched hole spiral skeleton and the second type of blinds punched hole spiral skeleton is larger than the size of the first end cover on the other side.

[0018] Further, the spherical magnet comprises a magnet housing and a spherical magnet portion;

[0019] The magnet housing is a hollow sphere consisting of two hollow semicircular structures connected by a threaded buckle;

[0020] The spherical magnet part is arranged in the magnet housing.

[0021] Furthermore, the diameter of the spherical magnet is 5% to 10% smaller than the inner diameter of the magnet housing, and the diameter range of the magnet housing is maintained at 0.1 mm to 2 mm.

[0022] Furthermore, the spherical magnet is made of NdFeB material above N48 with high corrosion resistance and strong magnetic force, and is additionally coated with zinc.

[0023] The present invention adopts the above technical solution, which has the following advantages:

[0024] 1. Compared with the traditional filter element, the outer layer of the filter element device of the present invention adopts an outer skeleton with a double-layer skeleton structure, which can enhance the strength of the filter element part and avoid crushing.

[0025] 2. The louver-like staggered opening structure of the exoskeleton of the present invention deflects the natural gas, which can effectively intercept large-size dust and droplets to form primary filtration.

[0026] 3. The second type of blinds punching spiral skeleton of the present invention has a plurality of spherical magnets embedded at intervals, which can absorb magnetic substances in the dust to form a loose dust layer and perform secondary filtration on solid and liquid impurities.

[0027] 4. The exoskeleton of the present invention is a detachable structure, which can effectively recycle the exoskeleton for repeated use, avoiding waste of resources and saving costs.

[0028] 5. The outer side of the first punched through hole inner frame of the present invention is wrapped with a shaped fiber non-woven fabric, which can reduce the resistance of the filter element, extend the service life of the filter element, and reduce the power consumption of the compressor while ensuring the filtering efficiency of the filter element.

[0029] 6. Multiple layers of nano-scale fiber filter materials treated with oleophobic treatment are arranged between the double-layer inner skeletons of the present invention, which is conducive to liquid aggregation and effectively avoids secondary entrainment.

[0030] 7. The double-layer exoskeleton of the present invention can effectively reduce the probability of secondary filtration caused by the liquid agglomerated in the high-position filter element dripping onto the low-position filter element when the filter element device is densely arranged horizontally in the filter cylinder.

[0031] 8. The installation of the magnetic separation chamber of the present invention can achieve the selective separation of magnetic pollutants and greatly reduce the load of the filter element.

[0032] 9. The corrugated adsorption groove in the magnetic separation chamber of the present invention adopts an inner concave structure to increase the adsorption area, which can enhance the separation performance.

[0033] 10. The present invention adopts a detachable magnetic core part, which can make the device repeatedly recycled to save resources and costs.

[0034] In summary, the present invention can be widely applied in the technical field of natural gas pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference numerals are used to represent the same components. In the accompanying drawings:

[0036] Figure 1 It is a schematic diagram of the structure of a filter element for high-pressure natural gas purification provided by one embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of a detachable frame structure provided by an embodiment of the present invention;

[0038] Figure 3 is a schematic structural diagram of a magnetic separation chamber provided by an embodiment of the present invention;

[0039] Figure 4 It is a structural schematic diagram of a magnet provided by one embodiment of the present invention;

[0040] Figure 5 is a schematic structural diagram of another magnet form provided by an embodiment of the present invention;

[0041] Figure 6It is a schematic diagram of the structure of a first type of blinds punching spiral skeleton provided by an embodiment of the present invention;

[0042] Figure 7 is a schematic diagram of a liquid coalescence process provided by an embodiment of the present invention, wherein: Figure 7 (a) is a schematic diagram of coalescing liquid flow. Figure 7 (b) is a schematic diagram of coalescing droplets;

[0043] Figure 8 is a schematic diagram of a dust filtration process provided by an embodiment of the present invention;

[0044] Fig. 9 It is a schematic diagram of a winding filter layer provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0046] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0047] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0048] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside", "outside", "inner side", "outer side", "below", "above", etc. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0049] Since the natural gas filter element in the prior art is generally a single-layer metal frame with generally low strength, and is mainly used for single-phase impurities, the present invention provides a filter element for high-pressure natural gas purification, including a filter element device and a magnetic separation chamber, wherein the filter element device includes a first type of louver punching spiral frame, a second type of louver punching spiral frame and a filter element part; the filter element part includes a first filter layer, a special-shaped fiber non-woven fabric, a first punching hole inner frame, a second filter layer and a second punching hole inner frame which are sequentially sleeved from the outside to the inside; the first type of louver punching spiral frame, the second type of louver punching spiral frame and the filter element part are sequentially detachably sleeved from the outside to the inside; both sides of the first type of louver punching spiral frame and the second type of louver punching spiral frame are provided with a first end cap, and one side of each first end cap is provided with a first gasket; the first punching hole inner frame The second end caps are arranged on both sides of the inner frame formed by the skeleton and the second punched through hole inner frame, and a second gasket is arranged on one side of each second end cap; located between the first type of louver punched spiral skeleton and the second type of louver punched spiral skeleton, a plurality of spherical magnets for adsorbing magnetic impurities are embedded on the second type of louver punched spiral skeleton at intervals, the second type of louver punched spiral skeleton is used for secondary filtration of dust, and the first filter layer is used for tertiary filtration of dust; the outer side of the first punched through hole inner frame is wrapped with a non-woven fabric of special-shaped fibers for reducing the resistance of the filter element; the first punched through hole inner frame and the second punched through hole inner frame are used to enhance the strength of the filter element part; the second filter layer is used for liquid agglomeration to avoid secondary entrainment; one side of the filter element device is detachably connected to the magnetic separation chamber for adsorbing magnetic particle impurities in the gas. The present invention is mostly used in filter separators for separating particulate impurities, especially horizontal filters with multiple filter elements installed in parallel. Under complex working conditions, the separator needs to remove dust and droplets at the same time. The liquid captured by the higher filter element flows from the lower side of the filter element to the lower filter element under the action of gravity. This situation is repeated many times before it flows to the bottom of the filter, forming multiple repeated filtrations, which increases the probability of the captured droplets being entrained by the filtered natural gas to the downstream of the filter.

[0050] like Figures 1 to 3As shown, this embodiment provides a filter element for high-pressure natural gas purification, including a filter element device 1 and a magnetic separation chamber 2, wherein the filter element device 1 includes a first type of louver punching spiral skeleton 11, a second type of louver punching spiral skeleton 12, a first end cover 13, a first gasket 14, a second end cover 15, a second gasket 16, a spherical magnet 17 and a filter element part 3, the filter element part 3 includes a first filter layer 31, a special-shaped fiber non-woven fabric 32, a first punching through hole inner skeleton 33, a second filter layer 34 and a second punching through hole inner skeleton 35 which are sequentially sleeved from the outside to the inside, the first type of louver punching spiral skeleton 11, the second type of louver punching spiral skeleton 12, the first punching through hole inner skeleton 33 and the second punching through hole inner skeleton 35 are all barrel-shaped structures, and the punching holes between the first type of louver punching spiral skeleton 11 and the second type of louver punching spiral skeleton 12 are staggered to deflect the fluid, thereby effectively intercepting large-size dust and droplets.

[0051] The first type of blinds punching spiral skeleton 11, the second type of blinds punching spiral skeleton 12 and the filter element part 3 are detachably arranged from the outside to the inside. The first end caps 13 are arranged on both sides of the outer skeleton formed by the first type of blinds punching spiral skeleton 11 and the second type of blinds punching spiral skeleton 12, and a first gasket 14 is arranged on one side of each first end cap 13. The second end caps 15 are arranged on both sides of the inner skeleton formed by the first punching hole inner skeleton 33 and the second punching hole inner skeleton 35, and a second gasket 16 is arranged on one side of each second end cap 15.

[0052] Located between the first type of blinds punching spiral skeleton 11 and the second type of blinds punching spiral skeleton 12, such as Figure 4 As shown, a plurality of spherical magnets 17 are embedded at intervals on the second type of blinds punching spiral skeleton 12 to absorb magnetic impurities and form a loose dust layer (such as Figure 2 The dust layer a) shown is used to effectively filter the dust for the first time. The second type of louver punching spiral skeleton 12 is used for secondary filtering of dust. The first filter layer 31 is used for tertiary filtering of dust. The outer side of the first punching hole inner skeleton 33 is wrapped with a non-woven fabric 32 of special-shaped fibers for reducing the resistance of the filter element. The first punching hole inner skeleton 33 and the second punching hole inner skeleton 35 are used to enhance the strength of the filter element part 3 to effectively prevent the filter element from being crushed under the high-pressure working condition of natural gas. The second filter layer 34 is used for liquid agglomeration to effectively avoid secondary entrainment.

[0053] One side of the filter element device 1 is detachably connected to the magnetic separation chamber 2, and the magnetic separation chamber 2 is used to adsorb magnetic particle impurities in the gas.

[0054] In a preferred embodiment, the magnetic separation chamber 2 includes a magnetic core 21, a corrugated adsorption groove 22, a magnetic core end cover 23 and a magnetic core gasket 24. The magnetic core 21 and the corrugated adsorption groove 22 are both barrel-shaped structures, the inner side of the magnetic core 21 is provided with a corrugated adsorption groove 22, the volumetric space inside the magnetic core 21 constitutes a magnetic separation chamber, both ends of the magnetic separation chamber are provided with magnetic core end covers 23, and one side of each magnetic core end cover 23 is provided with a magnetic core gasket 24, the magnetic core 21 is used to adsorb magnetic particle impurities in the gas, and the corrugated adsorption groove 22 is used to increase the adsorption area.

[0055] Specifically, the corrugated adsorption tank 22 adopts an inner concave structure, which can enhance the separation performance.

[0056] Specifically, when the magnetic separation chamber 2 needs to be replaced, the internal magnetic core 21 can be taken out, and the impurities adsorbed on the corrugated adsorption groove 22 inside the corrugated magnetic core 21 can be cleaned with a brush, and then the device can be reinstalled to achieve reuse, saving resources and costs. The magnetic separation chamber 2 and the filter element are a detachable structure as a whole, and can be used alone or in combination. The capture of dust occurs in the magnetic separation chamber 2, reducing the damage to the components.

[0057] In a preferred embodiment, Figure 4 As shown, the several spherical magnets 17 embedded at intervals on the second type of blinds punching spiral skeleton 12 can increase the filtration volume of the filter element device 1 by arranging multiple groups of spherical magnets 17. In order to reduce the pressure drop enhancement caused by the setting of the spherical magnets 17, the spherical magnets 17 are staggered to avoid failure of the filter element due to the accumulation of dust in the gap of the outer skeleton.

[0058] In a preferred embodiment, Figure 5 As shown, the spherical magnet 17 includes a magnet housing 171 and a spherical magnet portion 172. The magnet housing 171 is a hollow sphere composed of two hollow semicircular structures connected by a threaded buckle 173. The spherical magnet portion 172 is arranged inside the magnet housing 171. When it is necessary to clean the powder adsorbed outside the magnet housing 171, the magnet housing 171 is opened, and the black powder on the surface of the magnet housing 171 automatically falls off after losing the attraction of the spherical magnet portion 172.

[0059] Specifically, the diameter of the spherical magnet 2 is 5% to 10% smaller than the inner diameter of the magnet housing 1 to prevent the spherical magnet 2 from being unable to be removed due to the wall being too close to the magnet under the action of the magnetic force.

[0060] Specifically, the material of the magnet housing 1 is selected from materials with low magnetic permeability to prevent the magnetism from being generated due to long-term magnetization, such as aluminum alloy, stainless steel and the like.

[0061] Specifically, the diameter of the magnet housing 1 is maintained in the range of 0.1 mm to 2 mm. If the diameter is too large, the attraction of the spherical magnet 2 to the black powder will be affected. If the diameter is too small, the housing will be easily damaged under pressure.

[0062] In a preferred embodiment, the size of the second end cover 15 on one side of the first punched hole inner skeleton 33 and the second punched hole inner skeleton 35 is smaller than the size of the second end cover 15 on the other side, and the size of the first end cover 13 on one side of the first type of blinds punched spiral skeleton 11 and the second type of blinds punched spiral skeleton 12 is larger than the size of the first end cover 13 on the other side. In order to leave a certain margin for each inner and outer skeleton, an interference fit is adopted.

[0063] In a preferred embodiment, when the filter element part 3 needs to be replaced, the filter element part 3 can be taken out, the first type of blinds punching spiral skeleton 11 and the second type of blinds punching spiral skeleton 12 can be cleaned of attached impurities using a high-pressure water gun, and a new filter element part 3 can be inserted into the outer skeleton for continued use, saving resources and costs.

[0064] In a preferred embodiment, Figure 6 As shown, the first type of Venetian blinds punching spiral skeleton 11 and the second type of Venetian blinds punching spiral skeleton 12 are both obtained by punching holes (non-through holes) to form a venetian blinds-like structure and then winding it into a barrel-shaped structure. The punching shapes of the first type of Venetian blinds punching spiral skeleton 11 are all groove-shaped, and there are openings on the sides of the grooves. The opening directions are one row in the positive direction and one row in the reverse direction, and are continuously distributed. The punching shapes of the second type of Venetian blinds punching spiral skeleton 12 are all circular, and the aperture is 5%-10% smaller than the diameter of the spherical magnet 17. The punching spacing of the second type of Venetian blinds punching spiral skeleton 12 is determined according to the magnetic force of the spherical magnet.

[0065] Specifically, the materials of the first type of Venetian blinds punching spiral skeleton 11 and the second type of Venetian blinds punching spiral skeleton 12 are made of stainless steel to prevent corrosion.

[0066] Specifically, Figure 7As shown, the coalescence process of the filter element liquid, the coalescence droplets are tiny droplets formed by the aggregation of liquid molecules, usually due to the effect of surface tension that makes the liquid molecules form spheres in the air. The formation of coalescence droplets can be achieved through processes such as evaporation, condensation or dissolution. Coalescing droplets can form coalescence liquid flows under specific conditions. When the coalescence droplets contact with other droplets, they may merge with each other through the effect of surface tension and form larger droplets. This fusion process can form coalescence liquid flows between the coalescence droplets. The louver-like holes of the double-layer exoskeleton of the first type of louver punching spiral skeleton 11 and the second type of louver punching spiral skeleton 12 can effectively deflect the gas. The liquid impurities carried in the natural gas hit the skeleton and condense into large droplets. The droplets flow along the skeleton to the lowest point of the filter element under the action of gravity and drip; the dripping droplets are intercepted by the double-layer skeleton, which greatly avoids secondary filtration caused by dripping directly into the filter layer.

[0067] In a preferred embodiment, the spherical magnet 17 is made of NdFeB material above N48 with high corrosion resistance and strong magnetic force, and is coated with zinc. The annual demagnetization rate does not exceed 5% to avoid waste of the spherical magnet 17 due to corrosion. At the same time, the spherical magnet 17 with strong magnetic force can reduce the volume of the spherical magnet 17 and increase the spacing between the spherical magnets, which can reduce the volume of the filter element and reduce the weight of the filter element. The spacing between the spherical magnets 17 is determined according to the properties of the magnetic material and the volume of the spherical magnet 17. Figure 8 As shown, the spherical magnet 17 absorbs magnetic impurities and forms a loose dust layer a on the surface of the first type of blinds punching spiral skeleton 11, which effectively filters the dust for the first time; the impurities that break through the dust layer a are intercepted for the second time by the second type of blinds punching spiral skeleton 12, and finally intercepted for the third time by the first filter layer 31 and the second filter layer 34.

[0068] In a preferred embodiment, the first punched hole inner skeleton 33 and the second punched hole inner skeleton 35 both adopt a punched hole structure, which can effectively reduce the overall weight of the filter element while ensuring strength and functionality. In order to ensure the strength of the filter element, the punching area of ​​the first punched hole inner skeleton 33 and the second punched hole inner skeleton 35 can be increased to reduce the weight of the filter element while reducing the cost of the filter element.

[0069] Specifically, the first punched through hole inner frame 33 and the second punched through hole inner frame 35 are both made of a lightweight alloy material with a certain degree of corrosion resistance, such as an aluminum alloy material or a stainless steel material.

[0070] In a preferred embodiment, Fig. 9 As shown, in order to intercept small-size particles, the first filter layer is made of multi-layer nano-fiber filter materials treated with oil repellent and non-stick powder, which are wound into a barrel-shaped structure, and the second filter layer is made of multi-layer nano-fiber filter materials treated with oil repellent, which are wound into a barrel-shaped structure.

[0071] In a preferred embodiment, the shaped fiber non-woven fabric 32 wrapped around the outer side of the first punched hole inner skeleton 33 can effectively reduce the filter element resistance by 20% while ensuring the filtering effect compared with the traditional filter element.

[0072] The following describes in detail the use of the filter element for high-pressure natural gas purification in this embodiment through specific embodiments:

[0073] High pressure gas containing impurities enters Figure 1 In the filter element for high-pressure natural gas purification shown, the spherical magnet 17 absorbs magnetic impurities, forming a loose dust layer a on the surface of the first type of louvered perforated spiral skeleton 11, which effectively filters the dust for the first time; the impurities that break through the dust layer a are intercepted for the second time by the second type of louvered perforated spiral skeleton 12, and the punching holes between the first type of louvered perforated spiral skeleton 11 and the second type of louvered perforated spiral skeleton 12 are staggered to bend the fluid, thereby effectively intercepting large-particle dust and droplets. The first filter layer 31 and the second filter layer 34 intercept the fluid for the third time through filtering, and the finally escaped part of the magnetic black powder is adsorbed on the corrugated adsorption tank 22 under the action of the magnetic force of the magnetic core 21.

[0074] The above embodiments are only used to illustrate the present invention, wherein the structure, connection mode and manufacturing process of each component may be changed. Any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A filter element for high-pressure natural gas purification, characterized in that: It comprises a filter element device and a magnetic separation chamber, wherein the filter element device comprises a first type of louver punching spiral skeleton, a second type of louver punching spiral skeleton and a filter element part; the filter element part comprises a first filter layer, a special-shaped fiber non-woven fabric, a first punching hole inner skeleton, a second filter layer and a second punching hole inner skeleton which are sequentially sleeved from the outside to the inside; The first type of louver punching spiral skeleton, the second type of louver punching spiral skeleton and the filter element part are detachably arranged from the outside to the inside in sequence; both sides of the first type of louver punching spiral skeleton and the second type of louver punching spiral skeleton are provided with first end covers, and one side of each of the first end covers is provided with a first gasket; both sides of the inner skeleton formed by the first punching through hole inner skeleton and the second punching through hole inner skeleton are provided with second end covers, and one side of each of the second end covers is provided with a second gasket; Located between the first type of blinds punching spiral skeleton and the second type of blinds punching spiral skeleton, the second type of blinds punching spiral skeleton is embedded with a plurality of spherical magnets for adsorbing magnetic impurities at intervals, the second type of blinds punching spiral skeleton is used for secondary filtration of dust, and the first filter layer is used for tertiary filtration of dust; the outer side of the first punching through hole inner skeleton is wrapped with the shaped fiber non-woven fabric for reducing the resistance of the filter element; the first punching through hole inner skeleton and the second punching through hole inner skeleton are used to enhance the strength of the filter element; the second filter layer is used for liquid coalescence to avoid secondary entrainment; One side of the filter element device is detachably connected to the magnetic separation chamber for adsorbing magnetic particle impurities in the gas; The magnetic separation chamber comprises a magnetic core, a corrugated adsorption groove, a magnetic core end cover and a magnetic core gasket; The magnetic core and the corrugated adsorption groove are both barrel-shaped structures. The corrugated adsorption groove is arranged on the inner side of the magnetic core. The mass-containment space inside the magnetic core constitutes a magnetic separation cavity. The magnetic core end caps are arranged at both ends of the magnetic separation cavity. The magnetic core gasket is arranged on one side of each of the magnetic core end caps. The magnetic core is used to adsorb magnetic particle impurities in the gas, and the corrugated adsorption groove is used to increase the adsorption area. The first type of blinds punching spiral skeleton, the second type of blinds punching spiral skeleton, the first punched through hole inner skeleton and the second punched through hole inner skeleton are all barrel-shaped structures, and the punching holes between the first type of blinds punching spiral skeleton and the second type of blinds punching spiral skeleton are staggered.

2. A filter element for high-pressure natural gas purification as claimed in claim 1, characterized in that: The first type of Venetian blinds punching spiral skeleton and the second type of Venetian blinds punching spiral skeleton are both obtained by first punching holes to form a Venetian blinds-like structure and then winding it into a barrel-shaped structure.

3. A filter element for high-pressure natural gas purification as claimed in claim 2, characterized in that: The punching shapes of the first type of blinds punching spiral skeleton are all groove-shaped, with openings on the sides of the grooves, and the openings are distributed continuously in one row in the positive direction and one row in the reverse direction; The punching shapes of the second type of Venetian blinds punching spiral skeleton are all circular, and the punching spacing of the second type of Venetian blinds punching spiral skeleton is determined according to the magnetic force of the spherical magnet.

4. A filter element for purifying high-pressure natural gas as claimed in claim 1, characterized in that: The first punched through hole inner frame and the second punched through hole inner frame both adopt a punched through hole structure.

5. A filter element for purifying high-pressure natural gas as claimed in claim 1, characterized in that: The size of the second end cover on one side of the first punched hole inner skeleton and the second punched hole inner skeleton is smaller than the size of the second end cover on the other side, and the size of the first end cover on one side of the first type of blinds punched hole spiral skeleton and the second type of blinds punched hole spiral skeleton is larger than the size of the first end cover on the other side.

6. A filter element for purifying high-pressure natural gas as claimed in claim 1, characterized in that: The spherical magnet comprises a magnet housing and a spherical magnet portion; The magnet housing is a hollow sphere consisting of two hollow semicircular structures connected by a threaded buckle; The spherical magnet part is arranged in the magnet housing.

7. A filter element for high-pressure natural gas purification as claimed in claim 6, characterized in that: The diameter of the spherical magnet portion is 5% to 10% smaller than the inner diameter of the magnet housing, and the diameter of the magnet housing is maintained in the range of 0.1 mm to 2 mm.

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