Filter cloth, production device thereof and filter element

Abstract

The utility model discloses filter cloth, a production device thereof and a filter element, and relates to the technical field of filter materials, and the filter cloth comprises a first heat-sensitive non-woven fabric, an active carbon fiber felt cloth and a second heat-sensitive non-woven fabric which are sequentially bonded along the thickness direction. On one hand, the carbon fiber felt is coated with the first heat-sensitive non-woven fabric and the second heat-sensitive non-woven fabric, so that the carbon fiber filaments can be effectively intercepted, and on the other hand, the first heat-sensitive non-woven fabric and the second heat-sensitive non-woven fabric are tightly bonded with the carbon fiber felt, so that the falling condition of the carbon fiber filaments can be greatly reduced. Therefore, the problem that the valve is blocked due to the fact that the carbon fiber filaments of the activated carbon fiber felt cloth fall off can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter materials, in particular to a filter felt cloth and a production device and a filter element thereof. Background Art

[0002] Activated Carbon Fiber Cloth (ACF) is a material made of activated carbon fiber, which is obtained by physical or chemical activation treatment of carbon fiber and has a highly developed microporous structure. These micropores provide a large surface area, thus giving the activated carbon fiber cloth excellent adsorption properties and can be used for water and air purification.

[0003] When a filter element formed of conventional activated carbon fiber felt cloth is used for water purification, the carbon fiber fibers are prone to fall off under high water pressure, which in turn causes valve blockage at the rear end and affects the purification effect. Utility Model Content

[0004] The main purpose of the utility model is to provide a filter cloth and a production device and a filter element thereof, aiming to improve the problem of valve clogging caused by carbon fiber filaments falling off of an activated carbon fiber felt cloth.

[0005] To achieve the above-mentioned purpose, the filter cloth provided by the utility model comprises a first heat-sensitive non-woven fabric, an activated carbon fiber felt fabric and a second heat-sensitive non-woven fabric which are sequentially bonded along the thickness direction.

[0006] In one embodiment, the material of the first heat-sensitive non-woven fabric and / or the second heat-sensitive non-woven fabric is polymer fiber.

[0007] In one embodiment, the surface density of the first thermosensitive nonwoven fabric and / or the second thermosensitive nonwoven fabric is 15-40 g / m 2 .

[0008] In one embodiment, the thickness of the first heat-sensitive non-woven fabric and / or the second heat-sensitive non-woven fabric is 0.15-0.60 mm.

[0009] In one embodiment, the surface density of the activated carbon fiber felt is 180-360 g / m 2 ; and / or, the specific surface area of ​​the activated carbon fiber felt is 1300-1800m 2 / g; and / or, the iodine value of the activated carbon fiber felt is 1200-1700mg / m 2 .

[0010] In one embodiment, the activated carbon fiber felt has a thickness of 1.0-2.5 mm.

[0011] In one embodiment, the filter cloth further includes a functional filter material layer, which is disposed between the first heat-sensitive non-woven fabric and the activated carbon fiber felt fabric; and / or the functional filter material layer is disposed between the second heat-sensitive non-woven fabric and the activated carbon fiber felt fabric.

[0012] In one embodiment, the functional filter material layer is arranged on the outside of the activated carbon fiber felt cloth.

[0013] In one embodiment, the thickness of the functional filter material layer is 2.5-4.0 mm.

[0014] The utility model also provides a filter cloth production device, comprising:

[0015] A first roller, used for rolling up the first heat-sensitive non-woven fabric;

[0016] A second roller, used for rolling up the second heat-sensitive non-woven fabric;

[0017] The hot pressing mechanism comprises at least one set of hot pressing rollers, at least one of which is a hot roller, and is used for hot pressing and bonding the first heat-sensitive non-woven fabric, the second heat-sensitive non-woven fabric and the carbon fiber felt fabric.

[0018] In one embodiment, the heat roller is disposed in contact with the first heat-sensitive nonwoven fabric or the second heat-sensitive nonwoven fabric in a circumferential direction.

[0019] In one embodiment, the production device further comprises:

[0020] A material storage cavity is used to store functional filter materials, and a material discharge port is provided on the material storage cavity;

[0021] The paving mechanism comprises at least one set of paving rollers for paving the functional filter material onto the activated carbon fiber felt cloth.

[0022] In one embodiment, the production device further comprises:

[0023] The third roller is used for rolling up the carbon fiber felt.

[0024] The utility model also provides a filter element, which comprises the filter cloth of the utility model or the filter cloth produced by the production device of the utility model.

[0025] The filter cloth of the utility model comprises a first heat-sensitive non-woven fabric, an activated carbon fiber felt fabric and a second heat-sensitive non-woven fabric which are sequentially bonded in the thickness direction. On the one hand, the first heat-sensitive non-woven fabric and the second heat-sensitive non-woven fabric are used to cover the carbon fiber felt fabric, which can effectively intercept the carbon fiber filaments. On the other hand, the first heat-sensitive non-woven fabric and the second heat-sensitive non-woven fabric are tightly bonded to the carbon fiber felt fabric, which can greatly reduce the situation of carbon fiber filaments falling off. Therefore, the utility model can improve the problem of carbon fiber filaments falling off and blocking valves of the activated carbon fiber felt fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 It is a schematic longitudinal section diagram of a filter cloth in one embodiment of the utility model;

[0028] Figure 2 A schematic longitudinal section diagram of a filter cloth in another embodiment of the utility model;

[0029] Figure 3 A schematic longitudinal section diagram of a filter cloth in yet another embodiment of the present utility model;

[0030] Figure 4 It is a structural schematic diagram of a filter cloth production device in one embodiment of the utility model;

[0031] Figure 5 It is a structural schematic diagram of a filter cloth production device in another embodiment of the utility model;

[0032] Figure 6 This is a schematic structural diagram of a filter cloth production device in yet another embodiment of the present utility model;

[0033] Figure 7 It is a structural schematic diagram of a filter cloth production device in another embodiment of the utility model.

[0034] Description of Figure Numbers

[0035] 100. Filter cloth;

[0036] 110, first thermosensitive nonwoven fabric; 120, activated carbon fiber felt fabric; 130, second thermosensitive nonwoven fabric; 140, functional filter material layer; 1401, first functional filter material layer; 1402, second functional filter material layer;

[0037] 200. Production equipment for filter cloth;

[0038] 210, first roller shaft; 220, second roller shaft; 230, hot pressing mechanism; 2301, first pressing roller; 2302, first hot roller; 2303, second pressing roller; 2304, second hot roller; 2305, third hot roller; 2306, fourth hot roller; 240, material storage chamber; 2401, material discharge port; 250, flattening mechanism; 2501, third pressing roller; 2502, fourth pressing roller; 260, third roller shaft. DETAILED DESCRIPTION

[0039] It should be noted that if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. "At least one" appearing in the embodiments of the present invention refers to one or more, and "more than one" refers to two or more.

[0040] "Scope" disclosed in the utility model is defined in the form of lower limit and upper limit, and a given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundary of a particular range. The scope defined in this way can be inclusive or exclusive of end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if the scope of 60-120 and 80-110 is listed for a particular parameter, it is understood that the scope of 60-110 and 80-120 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In the utility model, unless otherwise specified, the numerical range "ab" represents the abbreviation of any real number combination between a and b, wherein a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0041] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0042] The filter element formed by conventional activated carbon fiber felt cloth mainly relies on the bottom non-woven fabric as the support layer and drives the activated carbon fiber felt cloth to be rolled around the central tube. In order to ensure that the flux density is not too dense, the non-woven fabric as the support layer is easy to fall off when the water pressure is high when used for water purification. The non-woven fabric cannot effectively intercept it, which leads to valve blockage at the rear end and affects the purification effect.

[0043] To this end, the utility model provides a filter cloth, comprising a first heat-sensitive non-woven fabric, an activated carbon fiber felt fabric and a second heat-sensitive non-woven fabric which are sequentially bonded along a thickness direction.

[0044] Thermosensitive nonwoven fabric is a special nonwoven fabric that is sensitive to temperature changes. The material is specially treated during the manufacturing process so that it can change its physical state or structure, such as softening, melting or deforming, when it reaches a certain temperature. This allows the nonwoven fabric to be bonded at a set temperature.

[0045] Bonding mainly refers to physical bonding, which can be cold press bonding, hot press bonding, ultrasonic bonding or adhesive bonding. The selection of the adhesive is based on the premise that it does not affect the adsorption performance of the material.

[0046] On the one hand, the utility model uses the first heat-sensitive non-woven fabric and the second heat-sensitive non-woven fabric to cover the carbon fiber felt cloth, which can effectively intercept the carbon fiber filaments. On the other hand, the first heat-sensitive non-woven fabric and the second heat-sensitive non-woven fabric are tightly bonded to the carbon fiber felt cloth, which can greatly reduce the situation of carbon fiber filaments falling off. Therefore, the utility model can improve the problem of carbon fiber filaments falling off and blocking valves of the activated carbon fiber felt cloth.

[0047] In addition, the filter cloth of the utility model first performs coarse filtration on the filter source through the heat-sensitive non-woven fabric, and then performs fine filtration through the activated carbon fiber felt cloth, which can improve the purification effect.

[0048] In an embodiment of the present invention, the material of the first heat-sensitive non-woven fabric and / or the second heat-sensitive non-woven fabric is polymer fiber.

[0049] The thermosensitive nonwoven fabric is composed of polymer fibers, which undergo a phase change when heated, from a solid state to a viscous flow state, thereby facilitating bonding. The polymer fiber can be specifically selected from one of polyethylene, polypropylene, and polyurethane. The materials of the first thermosensitive nonwoven fabric and the second thermosensitive nonwoven fabric can be the same or different, and the utility model does not make specific restrictions.

[0050] In the embodiment of the present invention, the surface density of the first heat-sensitive non-woven fabric and / or the second heat-sensitive non-woven fabric is 15-40 g / m 2 .

[0051] In the embodiment of the present invention, the thickness of the first heat-sensitive non-woven fabric and / or the second heat-sensitive non-woven fabric is 0.15-0.60 mm.

[0052] In the embodiment of the present invention, the surface density of the activated carbon fiber felt is 180-360g / m 2 ; and / or, the specific surface area of ​​the activated carbon fiber felt is 1300-1800m 2 / g; and / or, the iodine value of the activated carbon fiber felt is 1200-1700mg / m 2 .

[0053] In the embodiment of the present invention, the thickness of the activated carbon fiber felt cloth is 1.0-2.5 mm.

[0054] In an embodiment of the utility model, the filter cloth further includes a functional filter material layer, and the functional filter material layer is arranged between the first thermosensitive non-woven fabric and the activated carbon fiber felt cloth, and / or the functional filter material layer is arranged between the second thermosensitive non-woven fabric and the activated carbon fiber felt cloth. Functional filter material refers to a material that can achieve certain specific filtering effects, and can be selected from at least one of bactericides, scale inhibitors, lead removers, and harmful gas (sulfur dioxide, carbon monoxide, nitrogen oxides, dioxins, etc.) adsorbents. The utility model can increase the functionality of the filter cloth by setting a functional filter material layer, so as to give it a wider range of use and scenarios.

[0055] In an embodiment of the present utility model, the functional filter material layer is arranged on the outer side of the activated carbon fiber felt cloth.

[0056] The outside refers to the side of the filter cloth facing the filter source in the working state, that is, the functional filter material layer contacts the filter source before the activated carbon fiber felt cloth. The filter source is processed by the functional filter material layer and then adsorbed and filtered by the activated carbon fiber felt cloth to ensure the purification effect.

[0057] In the embodiment of the present utility model, the thickness of the functional filter material layer is 2.5-4.0 mm.

[0058] The utility model also provides a filter cloth production device, comprising:

[0059] A first roller, used for rolling up the first heat-sensitive non-woven fabric;

[0060] A second roller, used for rolling up the second heat-sensitive non-woven fabric;

[0061] The hot pressing mechanism comprises at least one set of hot pressing rollers, at least one of which is a hot roller, and is used for hot pressing and bonding the first heat-sensitive non-woven fabric, the second heat-sensitive non-woven fabric and the carbon fiber felt fabric.

[0062] The production device of the utility model can realize the bonding of the first heat-sensitive non-woven fabric, the second heat-sensitive non-woven fabric and the carbon fiber felt fabric by hot pressing, and is specifically suitable for bonding the sheet-like carbon fiber felt fabric and the heat-sensitive non-woven fabric.

[0063] In an embodiment of the present invention, the circumferential direction of the heat roller is laminated to the first heat-sensitive non-woven fabric or the second heat-sensitive non-woven fabric.

[0064] The embodiment of the utility model directly bonds the heat roller to the heat-sensitive non-woven fabric, so that the heat-sensitive non-woven fabric can reach the set temperature in a short time and change from a solid state to a viscous flow state, thereby improving the problem that the heat-sensitive non-woven fabric cannot be tightly bonded with the activated carbon fiber felt due to too short heating during the transportation process.

[0065] In an embodiment of the present invention, the production device further comprises:

[0066] A material storage cavity is used to store functional filter materials, and a material discharge port is provided on the material storage cavity;

[0067] The paving mechanism comprises at least one set of paving rollers for paving the functional filter material onto the activated carbon fiber felt cloth.

[0068] In an embodiment of the present utility model, the production device further comprises:

[0069] The third roller is used for rolling up the carbon fiber felt.

[0070] The production device of this embodiment is suitable for bonding rolled carbon fiber felt cloth and heat-sensitive non-woven fabric.

[0071] The utility model also provides a filter element, including the filter cloth of the utility model or the filter cloth produced by the production device of the utility model, which can be formed by rolling at least one layer of filter cloth on the filter cartridge. The specific arrangement of the filter cloth refers to the above embodiment. Since the filter element of the utility model adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0072] The following describes the invention in conjunction with specific embodiments.

[0073] Example 1

[0074] Filter cloth 100, reference Figure 1 As shown, including along the thickness direction (i.e. Figure 1 The first thermosensitive non-woven fabric 110, the activated carbon fiber felt fabric 120 and the second thermosensitive non-woven fabric 130 are sequentially bonded (from bottom to top in the drawing).

[0075] The first thermosensitive nonwoven fabric 110 is a polyethylene nonwoven fabric with a surface density of 30 g / m 2 , thickness is 0.3mm.

[0076] The surface density of the activated carbon fiber felt cloth 120 is 300g / m 2 , with a specific surface area of ​​1500m 2 / g, iodine value is 1500mg / m 2 , thickness is 2mm.

[0077] The second thermosensitive nonwoven fabric 130 is a polyethylene nonwoven fabric with a surface density of 30 g / m 2 , thickness is 0.3mm.

[0078] Example 2

[0079] Filter cloth 100, reference Figure 2 As shown, it includes a first thermosensitive non-woven fabric 110, an activated carbon fiber felt fabric 120, a functional filter material layer 140 and a second thermosensitive non-woven fabric 130 which are sequentially bonded along the thickness direction.

[0080] The first thermosensitive nonwoven fabric 110 is a polyurethane nonwoven fabric with a surface density of 40 g / m 2 , thickness is 0.2mm.

[0081] The surface density of the activated carbon fiber felt cloth 120 is 200g / m 2 , with a specific surface area of ​​1800m 2 / g, iodine value is 1700mg / m 2 , thickness is 1.5mm.

[0082] The thickness of the functional filter material layer 140 is 2.5 mm, and the functional filter material in the functional filter material layer is a bactericide.

[0083] The second thermosensitive nonwoven fabric 130 is a polyurethane nonwoven fabric with a surface density of 40 g / m 2 , thickness is 0.2mm.

[0084] Example 3

[0085] Filter cloth 100, reference Figure 3 As shown, it includes a first thermosensitive non-woven fabric 110, a first functional filter material layer 1401, an activated carbon fiber felt cloth 120, a second functional filter material layer 1402 and a second thermosensitive non-woven fabric 130 which are sequentially bonded along the thickness direction.

[0086] The first thermosensitive nonwoven fabric 110 is a polyurethane nonwoven fabric with a surface density of 20 g / m 2 , thickness is 0.5mm.

[0087] The thickness of the first functional filter material layer 1401 is 3 mm, and the functional filter material in the first functional filter material layer is a bactericide.

[0088] The surface density of the activated carbon fiber felt cloth 120 is 180g / m 2 , with a specific surface area of ​​1300m 2 / g, iodine value is 1200mg / m 2 , thickness is 1mm.

[0089] The thickness of the second functional filter material layer 1402 is 4 mm, and the functional filter material in the second functional filter material layer is a lead remover.

[0090] The material of the second thermosensitive non-woven fabric 130 is polypropylene non-woven fabric, and its surface density is 25g / m 2 , thickness is 0.3mm.

[0091] Example 4

[0092] Filter cloth production device 200, reference Figure 4 As shown, it includes a first roller 210 , a second roller 220 and a heat pressing mechanism 230 .

[0093] The first roller 210 is rotatably arranged on a frame (not shown) for rolling up the first heat-sensitive nonwoven fabric; the second roller 220 is rotatably arranged on the frame for rolling up the second heat-sensitive nonwoven fabric; the hot pressing mechanism 230 includes a first hot pressing roller pair and a second hot pressing roller pair, the first hot pressing roller pair includes a first pressing roller 2301 and a first hot roller 2302, the second hot pressing roller pair includes a second pressing roller 2303 and a second hot roller 2304, and the first hot roller 2302 and the second hot roller 2304 can be specifically an electric heating rod structure. Specifically, the circumference of the first hot roller 2302 is arranged in contact with the first heat-sensitive nonwoven fabric, and the circumference of the second hot roller 2304 is arranged in contact with the second heat-sensitive nonwoven fabric.

[0094] refer to Figure 4 As shown, the first roller 210 and the second roller 220 of this embodiment are staggered up and down, the first hot pressing roller and the second hot pressing roller are distributed left and right, and the second hot pressing roller is arranged on the right side of the second roller 220. The first roller 210 and the second roller 220 are distributed up and down because the first heat-sensitive non-woven fabric and the second heat-sensitive non-woven fabric are arranged on both sides of the activated carbon fiber felt cloth. The staggered distribution of the first roller 210 and the second roller 220 and the left and right distribution of the first hot pressing roller and the second hot pressing roller can realize the sequential bonding of the first heat-sensitive non-woven fabric, the second heat-sensitive non-woven fabric and the activated carbon fiber felt cloth. Taking this embodiment as an example, the first heat-sensitive non-woven fabric is first heat-pressed and bonded with the carbon fiber felt cloth under the action of the first pressing roller 2301 and the first hot roller 2302, and then the second heat-sensitive non-woven fabric is heat-pressed and bonded with the carbon fiber felt cloth under the action of the second pressing roller 2303 and the second hot roller 2304.

[0095] It should be noted that the production device of this embodiment is suitable for bonding sheet-like carbon fiber felt cloth and heat-sensitive non-woven fabric, and pieces of carbon fiber felt cloth are sequentially placed on the first heat-sensitive non-woven fabric for bonding.

[0096] Example 5

[0097] Filter cloth production device 200, reference Figure 5As shown, different from Example 4, the first roller 210 and the second roller 220 of this embodiment are relatively distributed up and down, and the hot pressing mechanism 230 of this embodiment includes only one set of hot pressing rollers, which include a third hot roller 2305 and a fourth hot roller 2306, that is, the hot pressing rollers of this embodiment are all hot rollers. Specifically, the circumference of the third hot roller 2305 is bonded to the first heat-sensitive non-woven fabric, and the circumference of the fourth hot roller 2306 is bonded to the second heat-sensitive non-woven fabric.

[0098] This embodiment can achieve synchronous bonding of the first heat-sensitive nonwoven fabric, the second heat-sensitive nonwoven fabric and the activated carbon fiber felt fabric, that is, the first heat-sensitive nonwoven fabric and the second heat-sensitive nonwoven fabric are heat-pressed and bonded to the activated carbon fiber felt fabric under the action of the third hot roller 2305 and the fourth hot roller 2306 respectively.

[0099] Example 6

[0100] Filter cloth production device 200, reference Figure 6 As shown, different from Embodiment 4, this embodiment further includes a material storage chamber 240 and a paving mechanism 250 .

[0101] The storage chamber 240 is arranged on the left side of the second roller 220 for storing functional filter material. A discharge port 2401 is provided at the bottom end of the storage chamber 240, that is, the discharge port 2401 faces the surface of the activated carbon fiber felt cloth so that the functional filter material falls on the activated carbon fiber felt cloth.

[0102] The paving mechanism 250 is arranged between the material storage chamber 240 and the second roller 220, and is used to spread the functional filter material on the activated carbon fiber felt cloth. The paving mechanism 250 includes a group of paving rollers, and the paving rollers include a third pressure roller 2501 and a fourth pressure roller 2502.

[0103] After the first thermosensitive non-woven fabric is heat-pressed and bonded to the lower surface of the activated carbon fiber felt cloth under the action of the first pressing roller 2301 and the first hot roller 2302, the functional filter material falls from the discharge port 2401 onto the upper surface of the activated carbon fiber felt cloth, and under the action of the third pressing roller 2501 and the fourth pressing roller 2502, the functional filter material is spread and compacted onto the activated carbon fiber felt cloth to form a functional filter material layer, and then the second thermosensitive non-woven fabric is heat-pressed and bonded by the second pressing roller 2303 and the second hot roller 2304 to fix the functional filter material layer, thereby forming a finished filter cloth.

[0104] Example 7

[0105] Different from the sixth embodiment, this embodiment further includes a third roller 260. Figure 7 As shown, the third roller 260 is arranged above the first roller 210 and is used for rolling the activated carbon fiber felt cloth. That is, the production device of this embodiment is suitable for bonding rolled carbon fiber felt cloth and heat-sensitive non-woven fabric.

[0106] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A filter cloth, characterized in that: The invention comprises a first heat-sensitive non-woven fabric, an activated carbon fiber felt fabric and a second heat-sensitive non-woven fabric which are sequentially bonded along a thickness direction.

2. The filter cloth according to claim 1, characterized in that The material of the first heat-sensitive non-woven fabric and / or the second heat-sensitive non-woven fabric is polymer fiber.

3. The filter cloth according to claim 1 or 2, characterized in that: The surface density of the first heat-sensitive nonwoven fabric and / or the second heat-sensitive nonwoven fabric is 15-40 g / m 2 .

4. The filter cloth according to claim 1 or 2, characterized in that: The thickness of the first thermosensitive nonwoven fabric and / or the second thermosensitive nonwoven fabric is 0.15-0.60 mm.

5. The filter cloth according to claim 1, characterized in that: The surface density of the activated carbon fiber felt is 180-360g / m 2 ; And / or, the specific surface area of ​​the activated carbon fiber felt is 1300-1800m 2 / g; And / or, the iodine value of the activated carbon fiber felt is 1200-1700 mg / m 2 .

6. The filter cloth according to claim 1 or 5, characterized in that: The thickness of the activated carbon fiber felt cloth is 1.0-2.5 mm.

7. The filter cloth according to claim 1, characterized in that: The filter cloth further comprises a functional filter material layer, and the functional filter material layer is arranged between the first thermosensitive non-woven fabric and the activated carbon fiber felt fabric; And / or, the functional filter material layer is arranged between the second thermosensitive non-woven fabric and the activated carbon fiber felt fabric.

8. The filter cloth according to claim 7, characterized in that The functional filter material layer is arranged on the outer side of the activated carbon fiber felt cloth.

9. The filter cloth according to claim 7 or 8, characterized in that: The thickness of the functional filter material layer is 2.5-4.0 mm.

10. A filter cloth production device, characterized in that: The production device comprises: A first roller, used for rolling up the first heat-sensitive non-woven fabric; A second roller, used for rolling up the second heat-sensitive non-woven fabric; The hot pressing mechanism comprises at least one set of hot pressing rollers, at least one of which is a hot roller, and is used for hot pressing and bonding the first heat-sensitive non-woven fabric, the second heat-sensitive non-woven fabric and the carbon fiber felt fabric.

11. The filter cloth production device according to claim 10, characterized in that: The circumferential direction of the heat roller is laminated with the first heat-sensitive non-woven fabric or the second heat-sensitive non-woven fabric.

12. The filter cloth production device according to claim 10, characterized in that: The production device also includes: A material storage cavity is used to store functional filter materials, and a material discharge port is provided on the material storage cavity; The paving mechanism comprises at least one set of paving rollers for paving the functional filter material onto the activated carbon fiber felt cloth.

13. The filter cloth production device according to claim 10 or 12, characterized in that: The production device also includes: The third roller is used for rolling up the carbon fiber felt.

14. A filter element, characterized in that: The filter cloth comprises the filter cloth described in any one of claims 1 to 9 or the filter cloth produced by the production device described in any one of claims 10 to 13.

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