CN217472924U - Single multifilament filter cloth with strong anti-hardening regeneration capacity - Google Patents

Abstract

The utility model relates to a single multifilament filter cloth that anti regeneration ability that hardens is strong interweaves by warp and woof and forms, and at least some warp is the polypropylene fibre monofilament that contains 0.8 ~1 wt% nanometer silica of compound conductive filament, and remaining warp is the polypropylene fibre monofilament that contains 0.8 ~1 wt% nanometer silica, and the conductive filament contacts with filtration equipment's electrically conductive shell. The utility model discloses a filter cloth's filter fineness is high, and the surface is smooth, and glutinous sediment is not glued, easily unloads the sediment, and anti hardens, and the regeneration capacity is strong.

Description

Single multifilament filter cloth with strong anti-hardening regeneration capacity

Technical Field

The utility model belongs to the technical field of filter equipment, a single multifilament filter cloth that anti regeneration ability that hardens is strong is related to.

Background

The lead-zinc industry has many processes, wherein the leaching process is generally carried out at about 50-70 ℃ under an acidic environment for liquid-solid separation. Part of the ores have high calcium content, and are easy to generate calcium salts which are difficult to dissolve in water during leaching, and the calcium salts are easy to attach to the surface of the filter cloth after being generated to form a film similar to scale. With the increase of time, the film becomes thicker and thicker, and finally the filter cloth is blocked, and the filter cloth is hardened and cannot be used. In addition, as partial procedures need to be dried, filter residue particles can be firmly adsorbed on the filter cloth under the adsorption action of static electricity, the difficulty of slag unloading is further increased, the recycling of the filter cloth is influenced, and the service life of the filter cloth is shortened.

The method for solving the problem of regeneration of the filter cloth is generally realized by adopting a method of soaking in strong alkali liquor or other auxiliary agents, but the method has an unsatisfactory effect of removing attachments on the surface of the filter cloth, and the method has the advantages of high frequency of cloth washing, short period and greatly increased labor intensity and cost.

Therefore, the design of the filter cloth which is used in the metallurgical industry, meets the requirement of the filter precision, is anti-hardening and has good regeneration performance has very important significance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems existing in the prior art and providing a single multifilament filter cloth with strong anti-hardening regeneration capability.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a single multifilament filter cloth with strong anti-hardening regeneration capability is formed by interweaving warps and wefts, wherein at least one part of warps are polypropylene monofilaments containing 0.8-1 wt% of nano silicon dioxide of composite conductive yarns, the rest warps are polypropylene monofilaments containing 0.8-1 wt% of nano silicon dioxide, and the conductive yarns are in contact with a conductive shell of filtering equipment (the filtering equipment is equipment matched with the filter cloth).

The utility model discloses a warp adopts modified 1F silk (containing 0.8 ~1 wt% nanometer silica polypropylene fiber monofilament promptly) among the filter cloth, it is the material that prior art (for example patent CN112410913A) has disclosed, because modified 1F silk contains 0.8 ~1 wt% nanometer silica, can improve the smoothness of monofilament (mix nanometer silica in the spinning process, can make the monofilament of spinning softer, more toughness, spinnability is better, thereby make the monofilament of spinning more slick and sly, the non-polarity of filter cloth material is improved, make polarity ion such as calcium salt be difficult to adhere to on the filter cloth, make the filter cloth be difficult to the glutinous sediment in the use, easily unload mud, improve the ageing resistance of monofilament simultaneously, the life of extension filter cloth, in filtering process, the filter material can form the filter cake on the smooth filter surface that 1F silk was knitted, because the filter cloth internal pore structure that 1F silk was knitted is simple relatively and the yarn surface is more smooth, the particles are not easy to adhere to the inner pores of the filter cloth, so that the adhesion force between the mud cake and the filter cloth is greatly reduced, the problem of filter cloth blockage is solved, and the phenomenon of easy hardening of the filter cloth is solved;

the utility model discloses an at least partly polypropylene fibre monofilament that contains 0.8 ~1 wt% nanometer silica for compound conductive filament in the filter cloth, the conductive filament contacts with filtration equipment's conductive shell, utilizes the shell contact of conductive filament and filtration equipment, can reduce the electrostatic voltage on the chemical fibre filter cloth fast, makes the material granule after weathering difficult to adhere to reach the filter cloth and easily unload sediment, longe-lived purpose.

As a preferred technical scheme:

the monofilament and multifilament filter cloth with strong anti-hardening regeneration capability has the advantages that the diameter of a polypropylene monofilament containing 0.8-1 wt% of nano silicon dioxide is 0.15-0.3 mm, the diameter of a conductive yarn is the same as that of the polypropylene monofilament containing 0.8-1 wt% of nano silicon dioxide, and the warp density is 400-1000 pieces/10 cm; the utility model discloses a diameter of warp is little in the filter cloth, and warp density is big, and the filter cloth surface is more smooth, and the clearance between filter cloth surface fiber is little, and the filter residue of hiding in the clearance is few, forms the filter cake more easily, easily unloads the sediment, and the anti ability that hardens of filter cloth is high.

The single-multifilament filter cloth with strong anti-hardening regeneration capability is characterized in that the weft yarns are 500-1500D (denier) polypropylene interlaced yarns, the network degree of the polypropylene interlaced yarns is 15-20/m, and the density of the weft yarns is 100-300 yarns/10 cm; the utility model discloses a woof adopts the interlaced yarn in the filter cloth, and it is the material that prior art (for example patent CN215628498U) has disclosed, and woof density is less than warp density, and the woof is hidden in the warp, and the nexus is 15~ 20/meter, and the smooth characteristic of existing FDY silk can utilize interlaced yarn space form characteristics tied in a bundle again, can effectively intercept the unable filterable particle of individual filter cake, further improves filter fineness, guarantees the filtration efficiency of filter cloth.

According to the single multifilament filter cloth with strong anti-hardening regeneration capability, the conductive yarns are arranged at equal intervals along the weft direction.

According to the single multifilament filter cloth with strong anti-hardening regeneration capability, in polypropylene monofilaments containing 0.8-1 wt% of nano silicon dioxide of the composite conductive yarns, the conductive yarns and the polypropylene monofilaments containing 0.8-1 wt% of nano silicon dioxide are naturally twisted and woven; "natural twist weaving" is that two yarns are naturally juxtaposed, and a yarn with 0-10 twist/m (generally regarded as untwisted) is formed under the action of the balloon generated in the production process, and the details are shown in patent CN 215232333U.

According to the single multifilament filter cloth with strong anti-hardening regeneration capability, the distance between the conductive yarns is 15-25 cm.

The monofilament filter cloth with strong anti-hardening regeneration capability has the resistance of 2 multiplied by 10 of the conductive yarn ⁸ ～4×10 ⁸ Omega/cm, which is a material already disclosed in the prior art (for example patent CN 215628498U).

According to the single multifilament filter cloth with strong anti-hardening regeneration capability, the weave structure of the filter cloth is twill, satin and variable weave, the surface is smooth, the filter cloth is divided into the working surface and the non-working surface, the warp tissue points of the working surface are more, the warp yarns cover the surface of the weft yarns, the weft yarns are hidden in the warp yarns, and the non-working surface is opposite, which are determined by the weave structure of the filter cloth.

The monofilament filter cloth with strong anti-hardening regeneration capability has the gram weight of 300-800 g/cm ² The service life of the filter cloth in the leaching process of the zinc industry is about 50 percent longer than that of the common single multifilament filter cloth.

Has the beneficial effects that:

the utility model discloses a filter cloth's filter fineness is high, and the surface is smooth, and glutinous sediment is not glued, easily unloads the sediment, and anti hardens, and the regeneration capacity is strong.

Drawings

FIG. 1 is a drawing in drafting;

FIG. 2 is a drawing of a card;

FIG. 3 is a schematic view of warp and weft yarn positions;

FIG. 4 is a schematic diagram showing the distribution of polypropylene monofilaments containing 0.8-1 wt% of nano-silica in the composite conductive yarn on a cloth cover;

wherein the 1-warp, the 2-weft and the 3-composite conductive yarn are polypropylene monofilaments containing 0.8-1 wt% of nano silicon dioxide.

Detailed Description

The present invention will be further described with reference to the following detailed description. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications can be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

A single multifilament filter cloth with strong anti-hardening regeneration capability is shown in figure 3 and is formed by interweaving warp yarns 1 and weft yarns 2;

one part of warp yarns are polypropylene monofilaments containing 0.8-1 wt% of nano-silica of the composite conductive yarn, the other part of warp yarns are polypropylene monofilaments containing 0.8-1 wt% of nano-silica, and the schematic distribution diagram of the polypropylene monofilaments containing 0.8-1 wt% of nano-silica of the composite conductive yarn on the cloth cover is shown in FIG. 4; in the polypropylene monofilament containing 0.8-1 wt% of nano silicon dioxide of the composite conductive yarn, the conductive yarn and the polypropylene monofilament containing 0.8-1 wt% of nano silicon dioxide are naturally twisted and woven; the conductive wires are arranged at equal intervals along the weft direction, the interval of the conductive wires is 15-25 cm, and the resistance of the conductive wires is 2 multiplied by 10 ⁸ ～4×10 ⁸ Omega/cm; the diameter of the polypropylene monofilament containing 0.8-1 wt% of nano silica is 0.15-0.3 mm, the diameter of the conductive yarn is the same as that of the polypropylene monofilament containing 0.8-1 wt% of nano silica, the density of warp yarn is 400-1000 pieces/10 cm, and the conductive yarn is in contact with a conductive shell of the filtering equipment;

the weft yarns are 500-1500D polypropylene interlaced yarns, the network degree of the polypropylene interlaced yarns is 15-20 yarns/meter, and the density of the weft yarns is 100-300 yarns/10 cm;

the weave structure of the filter cloth is twill weave (satin weave and variable weave can also be adopted); the gram weight of the filter cloth is 300-800 g/cm ² 。

The preparation method of the single multifilament filter cloth with strong anti-hardening regeneration capacity comprises the following steps:

(1) preparing raw materials;

warp yarn: one part of warp yarns are polypropylene monofilaments containing 0.8-1 wt% of nano silicon dioxide of the composite conductive yarn, and the other part of warp yarns are polypropylene monofilaments containing 0.8-1 wt% of nano silicon dioxide; in the polypropylene fiber monofilament containing 0.8-1 wt% of nano silicon dioxide of the composite conductive yarn, the conductive yarn and the polypropylene fiber monofilament containing 0.8-1 wt% of nano silicon dioxideNaturally twisting and weaving polypropylene monofilaments; the diameter of the polypropylene monofilament containing 0.8-1 wt% of nano silica is 0.15-0.3 mm, and the diameter of the conductive yarn is the same as that of the polypropylene monofilament containing 0.8-1 wt% of nano silica; the resistance of the conductive filament is 2 x 10 ⁸ ～4×10 ⁸ Ω/cm；

Weft yarn: the weft yarns are 500-1500D polypropylene interlaced yarns, and the interlacing degree of the polypropylene interlaced yarns is 15-20 yarns/m;

(2) warping;

warping in a sectional warping mode according to the process requirements to make a beam;

(3) drafting;

drafting by a forward drawing method as shown in fig. 1;

(4) weaving;

weaving on a machine according to the pattern plate of the filter cloth; wherein, the card drawing is shown in figure 2, the conductive wires are arranged at equal intervals along the weft direction during weaving, the interval of the conductive wires is 15-25 cm, the density of the warp is controlled to be 400-1000 pieces/10 cm, the density of the weft is controlled to be 100-300 pieces/10 cm, the weave structure of the filter cloth is twill weave, and the gram weight of the filter cloth is 300-800 g/cm ² 。

Claims (9)

1. The single multifilament filter cloth with strong anti-hardening regeneration capability is formed by interweaving warps and wefts and is characterized in that at least one part of the warps are nano silicon dioxide modified polypropylene monofilaments of composite conductive yarns, the rest warps are nano silicon dioxide modified polypropylene monofilaments, and the conductive yarns are in contact with a conductive shell of filtering equipment.

2. The single multifilament filter cloth according to claim 1, wherein the diameter of the nano silica modified polypropylene monofilament is 0.15-0.3 mm, the diameter of the conductive filament is the same as that of the nano silica modified polypropylene monofilament, and the warp density is 400-1000 pieces/10 cm.

3. The single multifilament filter cloth according to claim 2, wherein the weft yarns are 500-1500D polypropylene interlaced yarns, the interlacing degree of the polypropylene interlaced yarns is 15-20 yarns/m, and the weft yarn density is 100-300 yarns/10 cm.

4. The single multifilament filter cloth according to claim 3, wherein the conductive filaments are arranged at equal intervals along the weft direction.

5. The single multifilament filter cloth according to claim 4, wherein the nano silica modified polypropylene monofilament of the composite conductive yarn is formed by natural twisting and weaving of the conductive yarn and the nano silica modified polypropylene monofilament.

6. The single multifilament filter cloth according to claim 4, wherein the distance between the conductive filaments is 15-25 cm.

7. The monofilament filter cloth having high anti-hardening regeneration ability according to claim 4, wherein the conductive yarn has a resistance of 2 x 10 ⁸ ~4×10 ⁸ Ω/cm。

8. The single multifilament filter cloth according to claim 1, wherein the weave structure of the filter cloth is twill, satin and variation weave.

9. The monofilament filter cloth with strong anti-hardening regeneration capability according to claim 1, wherein the gram weight of the filter cloth is 300-800 g/cm ² 。

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