Self-forming pre-coating filter and system

Abstract

The utility model relates to the technical field of filtration, in particular to a self-forming pre-coating filter and a system. The self-forming pre-coating filter comprises a carrier layer which is arranged in the bottle body and sequentially comprises a strength supporting layer, a fine filtering layer and a pre-coating carrier layer from inside to outside; an accommodating space is formed between the carrier layer and the bottle body; one end of the water guide pipe is arranged in the accommodating space and is sleeved with a sealing leather film, and the other end of the water guide pipe is communicated with the outside; and the accommodating space is also filled with a filtering material. Through the cooperative use of the carrier layer and the filler layer, filter cakes which are uniformly distributed can be formed, a pre-coating layer which is not easy to fall off is formed, and the filter has the advantages of adjustable filtering precision, low pressure drop, large flow and convenience in production.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technology field, especially a kind of self-forming pre-coated filter and system. BACKGROUND

[0002] Pre-coated filter technology has been widely used in industrial field, and is commonly used in filter press, candle filter, vane filter and laminated filter. The pre-coated layer can form high-porosity incompressible filter cloth on the surface of filter cloth or filter membrane, so that the filter has the advantages of deep filtration anti-clogging and high filtration speed. However, due to the strength of the coating itself, the coating is difficult to be thick and not to fall off. Therefore, in practical application, the pre-coated layer of the pre-coated filter is generally thin, and is used as a peelable and disposable coating for anti-clogging and high filtration speed in industry. Pre-coated filter technology is also less used in household water purifiers. The famous folding membrane filter of Everpure uses superfine carbon powder and capsule filter membrane. It improves the water passing area of the filter, but due to the structure design, the pre-coated layer is thin, and the service life is not high under the same volume. The commonly used compressed and sintered carbon rod in household water purifiers has low porosity and large filtration resistance. Moreover, PE powder is used for hot melt bonding, which easily introduces plastic particles and has high energy consumption. The wet filter core can overcome the above-mentioned shortcomings of carbon rod, but it has problems such as complicated process, need for drying, expensive key raw materials and limited shape to hollow cylinder. SUMMARY

[0003] This section aims to outline some aspects of the embodiments of the present utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the present utility model.

[0004] In view of the above or the problem that the pre-coated coating is difficult to be thick, easy to fall off and unable to adjust the filtration precision in the prior art, the present utility model is proposed.

[0005] Therefore, the purpose of the present utility model is to provide a self-forming pre-coated filter. To solve the above technical problems, the present utility model provides the following technical solutions: a carrier layer is arranged inside a bottle body, which comprises a strength support layer, a fine filter layer and a pre-coated carrier layer from inside to outside; a containing space is formed between the carrier layer and the bottle body; a water guide pipe is arranged in the containing space and covered with a sealing film, and the other end is in communication with the outside; and the containing space is also filled with a filter material.

[0006] As a preferred embodiment of the self-forming pre-coated filter of the present utility model, it further comprises a water inlet and a water outlet, the water inlet is in communication with the end of the water guide pipe, and the water outlet is in communication with the top of the carrier layer.

[0007] As a preferred scheme of the self-forming pre-coated filter, the carrier layer is further provided with end caps at both ends, water guide holes are formed in the end caps, and the water guide holes are communicated with the water outlets.

[0008] As a preferred scheme of the self-forming pre-coated filter, a plurality of square holes are formed in the strength support layer, and the strength support layer is made of plastic.

[0009] As a preferred scheme of the self-forming pre-coated filter, the fine filter layer is SM non-woven fabric or SMS non-woven fabric, and the pre-coated carrier layer is warp-knitted spacer fabric or strip velvet.

[0010] As a preferred scheme of the self-forming pre-coated filter, the filter material includes functional fillers and adsorbing fillers, the functional fillers are one or more of powdered solid adsorbents, ion exchange resins and filter aids, and the adsorbing fillers are one or more of superfine activated carbon powder, ATS lead removal powder, hydroxyapatite and silver-loaded glass powder.

[0011] As a preferred scheme of the self-forming pre-coated filter, the adsorbing fillers are filled in controlled-release packaging bags, and the controlled-release packaging bags are one or more of PVA films, cellulose ester films and temporary wet-strength paper.

[0012] As a preferred scheme of the self-forming pre-coated filter, the functional fillers are adsorbed on the pre-coated carrier layer to form filter cakes when water is added.

[0013] As a preferred scheme of the self-forming pre-coated filter, the strength support layer has a circular cross section, and the fine filter layer and the pre-coated carrier layer have petal-shaped cross sections.

[0014] To solve the above technical problems, the utility model also provides the following technical scheme: a self-forming pre-coated filter system includes a self-forming pre-coated filter.

[0015] The utility model has the advantages that: through the cooperation of the carrier layer and the filler layer, uniform filter cakes can be formed, the pre-coated layer is not easy to fall off, the filtering precision can be adjusted, the pressure drop is low, the flow is large, and the production is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings. Among them:

[0017] Figure 1 It is a whole schematic view of a self-forming pre-coated filter.

[0018] Figure 2 It is a whole schematic view of a self-forming pre-coated filter after filter cake formation.

[0019] Figure 3 It is a schematic view of a carrier layer of a self-forming pre-coated filter.

[0020] Figure 4 It is a schematic view of another carrier layer of a self-forming pre-coated filter. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification.

[0022] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0023] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0024] Embodiment 1

[0025] Reference Figures 1-3 For the first embodiment of the present application, the embodiment provides a self-forming pre-coated filter, which comprises a carrier layer 100, a filter 200, a water guide pipe 300 and a bottle body 400.

[0026] Specifically, the carrier layer 100 is arranged inside the bottle body 400, and sequentially comprises a strength support layer 101, a fine filter layer 102 and a pre-coated carrier layer 103 from inside to outside; the water guide pipe 300 is arranged in the accommodating space M and is sleeved with the sealing film 301, and the other end is communicated with the outside; the accommodating space M is formed between the carrier layer 100 and the bottle body 400, and the filter material 200 is also filled in the accommodating space M; the functional filler 201 is adsorbed on the pre-coated carrier layer 103 after water passing to form a filter cake, and the adsorption filler 202 is arranged in the controlled release packaging bag 202a; the carrier layer 100, the filter material 200 and the water guide pipe 300 are all arranged in the bottle body 400. The strength support layer 101 is a component for providing compression strength inside, the fine filter layer 102 has high filtering precision and can prevent the filler from leaking to the downstream, and the pre-coated carrier layer 103 provides an attachment position of the functional filler and provides strength to avoid peeling.

[0027] Further, the water guide pipe 300 is arranged outside the carrier layer 100 and in the middle of the bottle body 400, the filter material 200 is filled at the bottom side of the accommodating space M, the functional filler 201 is scattered at the bottom of the bottle body 400 without water passing, the adsorption filler 202 is arranged in the controlled release packaging bag 202a, and the controlled release packaging bag 202a is bound at any position outside the pre-coated carrier layer 103. When the functional filler 201 is lifted by water impacting the bottom of the bottle body 400, the functional filler 201 forms a suspension in water and is adsorbed on the pre-coated carrier layer 103 to form a filter cake, and when the water level gradually rises until the controlled release packaging bag 202a is contacted, the controlled release packaging bag 202a is broken or dissolved by water, so that the adsorption filler 202 in the controlled release packaging bag 202a is released and captured by the formed filter cake, thereby enhancing the filtering precision.

[0028] The bottle body 400 further comprises a water inlet 401 and a water outlet 402, the water inlet 401 is communicated with the end of the water guide pipe 300, and the water outlet 402 is communicated with the top of the carrier layer 100. The two ends of the carrier layer 100 are further fixedly provided with end covers 104, the end covers 104 are provided with water guide holes, and the water guide holes are communicated with the water outlet 402. Water passes through the water inlet 402 through the water guide pipe 300, breaks the sealing film 301 at the bottom end of the water guide pipe 300, so that the functional filler 201 at the bottom is lifted, and the water passes through the filter cake and is discharged through the water guide hole to the water outlet 402.

[0029] Preferably, the strength support layer 101 is a porous plastic pipe, the fine filter layer 102 is SM non-woven fabric or SMS non-woven fabric, and the pre-coated carrier layer 103 is warp-knitted spacer fabric or strip velvet.

[0030] Preferably, the functional filler 201 is one or more of a powdered solid adsorbent, an ion exchange resin and a filter aid. The adsorption filler 202 is one or more of superfine activated carbon powder, ATS lead removal powder, hydroxyapatite and silver-loaded glass powder.

[0031] Preferably, the controlled release bag 202a is one or more of PVA film, cellulose ester film, temporary wet strength paper.

[0032] In use, when the filter is not in water, the bottom of the water guide pipe 300 is sealed by the sealing film 301, and the powder in the bottle body 400 will not be scattered. When the filter is in water, the sealing film 301 is broken by water pressure, and the functional filler 201 at the bottom of the bottle is lifted by the water flow and is carried by the water flow to form a filter cake inside and on the surface of the pre-coated carrier layer 103. At the position where the filter cake is thick, the deposition rate of the filter cake is slow due to the large resistance. Similarly, at the position where the filter cake is thin, the deposition rate of the filter cake is fast due to the small resistance. Therefore, the filter cake formed by the functional filler 201 can be approximately uniformly distributed in the pre-coated carrier layer 103. The pre-coated carrier layer 103 is a fabric, and the filtration precision is not high. If the particle size of the functional filler 201 is too fine, part of the fine particle size filler will penetrate the pre-coated carrier layer 103 during the formation of the filter cake, and then be captured by the fine filter layer 102. After the filter is in contact with water for a period of time, the controlled release bag 202a is broken, and the adsorbed filler 202 wrapped therein is released. These powders will be captured by the filter cake formed during water filtration, thereby increasing the filtration precision, improving the performance, and adding special functions.

[0033] Embodiment 2

[0034] Reference Figures 1-3 For the second embodiment of the utility model, the embodiment provides a self-forming pre-coated filter, which comprises a carrier layer 100, a filter 200, a water guide pipe 300 and a bottle body 400.

[0035] Specifically, the carrier layer 100 is arranged inside the bottle body 400 and comprises, from inside to outside, a strength support layer 101, a fine filter layer 102 and a pre-coated carrier layer 103. The water guide pipe 300 has one end arranged in the containing space M and sleeved with a sealing film 301, and the other end is in communication with the outside. The containing space M is formed between the carrier layer 100 and the bottle body 400, and the containing space M is further filled with the filter 200. The pre-coated carrier layer 103 on which the functional filler 201 is adsorbed after being in water forms a filter cake, and the adsorbed filler 202 is arranged in the controlled release bag 202a.

[0036] Further, the strength support layer 101 is a porous plastic pipe, the fine filter layer 102 is SM non-woven fabric, and the pre-coated carrier layer 103 is warp-knitted spacer fabric.

[0037] Wherein, in the outer diameter 30mm, long 180mm porous plastic tube outer package a layer of equal length 0.2mm thick, nominal filter precision is 40μm SM non-woven fabric, the non-woven fabric in the joint heat sealing adhesive. In the non-woven fabric outer package a layer of equal length, thickness is 15mm, the measured bottom fabric density is about 60 mesh, top fabric is hexagonal warp knitted spacer fabric. In the joint using hot melt adhesive sealing. The plastic tube with spacer fabric on the upper and lower adhesive end cap, so that it is sealed well. Form the carrier layer 100.

[0038] Preferably, using 100g, 40-120 mesh, iodine value of 1100 coconut shell activated carbon as functional filler 201, select its dissolution time is about 1 minute of water soluble pva film bag, 25g, 200-600 mesh, iodine value of 1500 coconut shell activated carbon as adsorption filler 202. Select the length of the bottle body 280mm filter bottle, its internal length is 260mm, water guide pipe 300 opening distance from the bottom of about 10mm, stick with sealing film 301.

[0039] In use, the carrier layer 100, functional filler 201, water soluble pva film bag is loaded into the bottle body 400. Make it sealed well, wait for the filter. The filter is connected to the tap water, after 2 minutes, the self-forming pre-coated filter is obtained.

[0040] Example 3

[0041] Reference Figure 1 And Figure 4 , the third embodiment of the utility model, the embodiment provides a self-forming pre-coated filter, including carrier layer 100, filter 200, water guide pipe 300 and bottle body 400.

[0042] Specifically, the carrier layer 100 is arranged in the bottle body 400, which comprises strength support layer 101, fine filter layer 102 and pre-coated carrier layer 103 from inside to outside; the water guide pipe 300 is arranged in the accommodation space M and is sleeved with the sealing film 301, and the other end is communicated with the outside; the accommodation space M is formed between the carrier layer 100 and the bottle body 400, the filter 200 is filled in the accommodation space M, the pre-coated carrier layer 103 on which the functional filler 201 is adsorbed after water permeation forms filter cake, and the adsorption filler 202 is arranged in the controlled-release packaging bag 202a. The cross section of the strength support layer 101 is circular; the cross section shapes of the fine filter layer 102 and the pre-coated carrier layer 103 are petal-shaped.

[0043] Further, the strength support layer 101 is selected from extruded porous plastic pipe, the fine filter layer 102 is selected from SMS non-woven fabric, and the pre-coated carrier layer 103 is selected from warp knitted spacer fabric.

[0044] The PE net with a hole diameter of about 1 cm and a net thickness of 2 mm, the SMS non-woven fabric with a thickness of 0.5 mm and a nominal filtering precision of 20 microns, and the warp-knitted spacer fabric with a thickness of 6 mm and an actual bottom fabric density of about 60 meshes and a top fabric of a stripe type are sequentially aligned and placed, and are sent into a folding machine to be folded and heated and shaped. The folding height is about 46 mm, and the folding number is 11. Hot melt adhesive is used to hot-press and bond and fix at the joint. The cutting is 180 mm. The folding is straightened to be close to equal spacing, and then end caps are pasted and fixed to form a carrier layer 100.

[0045] Preferably, 340 g of 80-200 mesh coconut shell activated carbon with an iodine value of 1100 is used as the functional filler 202, a water-soluble pva film bag with a dissolution time of about 2 minutes is selected, 50 g of 200-600 mesh coconut shell activated carbon with an iodine value of 1500 is packaged as the adsorption filler 202. A bottle body 400 with a bottle body length of 280 mm is selected, the inner length is 260 mm, the water guide pipe 300 is about 10 mm away from the bottom of the bottle, and a sealing film 301 is adhered.

[0046] In use, the carrier layer 100, the functional filler 202, and the water-soluble pva film bag are loaded into the bottle body 400. The sealing is good, and the filter is used. The filter is connected to tap water, and after about 4 minutes, a self-forming pre-coated filter is obtained.

[0047] In summary, the beneficial effects of the utility model are as follows:

[0048] 1. By cooperation of the carrier layer 100 and the filter 200, the functional filler 202 can form a uniform filter cake on the pre-coated carrier layer 103, form a pre-coated layer that is not easy to fall off, and the filtering precision can be adjusted to adapt to different water quality requirements.

[0049] 2. By using special filler bags, the filter cake can be covered at the end to avoid the loss of small components at the beginning, and the filtering precision is enhanced.

[0050] 3. The self-forming pre-coated filter does not require complex compression or sintering process, does not depend on expensive key materials, the production process is convenient and controllable, is suitable for large-scale production, and has a significant cost advantage.

[0051] It is important to note that the construction and arrangements of the application shown in the various exemplary embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications can be made to the embodiments without departing from the novel teachings and advantages of the subject matter described herein. For example, elements described as integrated in a single unit can be separated, elements described as separate can be integrated, and the position, number, shape, and arrangements of elements can be varied. Accordingly, all such modifications are intended to be included within the scope of the present inventive subject matter. The order or sequence of any process or method steps can be varied or re-sequenced without departing from the general nature of the claims. Any "means plus function" clauses are intended to cover the structures described herein as performing the recited functionality and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present inventive subject matter. Accordingly, the present inventive subject matter is not limited to the particular embodiments described and illustrated herein, but extends to equivalents of which the foregoing describes are intended to cover.

[0052] Furthermore, in order to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described (i.e., those pertaining to the

[0053] It is understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts can inevitably lead to a number of substitutions, modifications, changes, and omissions of parts illustrated as having a specific configuration. Such are the natural consequences of research and development efforts, and

[0054] It should be noted that the above examples are intended to illustrate the technical solutions of the present application but not limit the present application, and although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and all should be included in the scope of the claims of the present application.

Claims

1. A self-forming pre-coated filter, characterized in that: include, The carrier layer (100) is disposed inside the bottle body (400), and from the inside out it includes a strength support layer (101), a fine filter layer (102), and a pre-coated carrier layer (103); the carrier layer (100) and the bottle body (400) form an accommodating space (M). A water pipe (300) has one end placed in the accommodating space (M) and fitted with a sealing membrane (301), and the other end connected to the outside. The accommodating space (M) is also filled with filter material (200).

2. The self-forming pre-coated filter as described in claim 1, characterized in that: It also includes an inlet (401) and an outlet (402), the inlet (401) being connected to the end of the water guide pipe (300), and the outlet (402) being connected to the top of the carrier layer (100).

3. The self-forming pre-coated filter as described in claim 2, characterized in that: The carrier layer (100) is also fixedly provided with end caps (104) at both ends. The end caps (104) are provided with water guide holes, which are connected to the water outlet (402).

4. The self-forming pre-coated filter as described in claim 3, characterized in that: The strength support layer (101) has several square holes, and the strength support layer (101) is made of plastic.

5. The self-forming pre-coated filter as described in claim 4, characterized in that: The fine filter layer (102) is SM nonwoven fabric or SMS nonwoven fabric, and the pre-coated carrier layer (103) is warp-knitted spacer fabric or corduroy.

6. The self-forming pre-coated filter as described in claim 4 or 5, characterized in that: The filter media (200) includes a functional filler (201) and an adsorption filler (202). The functional filler (201) is one or more of a powdered solid adsorbent, an ion exchange resin, and a filter aid. The adsorption filler (202) is one or more of an ultrafine activated carbon powder, ATS lead removal powder, hydroxyapatite, and silver-impregnated glass powder.

7. The self-forming pre-coated filter as described in claim 6, characterized in that: The adsorption filler (202) is filled in a controlled-release packaging bag (202a), which is one or more of PVA film, cellulose ester film, and temporary wet strength paper.

8. The self-forming pre-coated filter as described in claim 7, characterized in that: The functional filler (201) is adsorbed by water on the pre-coated carrier layer (103) to form a filter cake (105).

9. The self-forming pre-coated filter as described in claim 8, characterized in that: The cross-section of the strength support layer (101) is circular; the cross-sectional shape of the fine filter layer (102) and the pre-coated carrier layer (103) is petal-shaped.

10. A self-forming pre-coated filter system, characterized in that: Includes the self-forming pre-coated filter as described in any one of claims 1 to 9.

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