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High-performance anti-scaling modified filter cloth for vacuum filter and preparation method of high-performance anti-scaling modified filter cloth

A vacuum filter, high-performance technology, applied in the field of separation, can solve the problems of prolonging the separation time and increasing the operating cost of the enterprise, and achieve high flux recovery rate, high water flux and flux recovery rate, and good modification effect Effect

Pending Publication Date: 2022-05-24
HEBEI IRON & STEEL GRP MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cleaning the filter cloth will suspend the operation of the filter equipment and prolong the separation time, thereby increasing the operating cost of the enterprise

Method used

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  • High-performance anti-scaling modified filter cloth for vacuum filter and preparation method of high-performance anti-scaling modified filter cloth
  • High-performance anti-scaling modified filter cloth for vacuum filter and preparation method of high-performance anti-scaling modified filter cloth
  • High-performance anti-scaling modified filter cloth for vacuum filter and preparation method of high-performance anti-scaling modified filter cloth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of a high-performance anti-fouling modified filter cloth for a vacuum filter, comprising the following steps:

[0033] (1) Disperse the amphoteric polyacrylamide and carbon nanotubes in deionized water to prepare a modified solution, and ultrasonically treat the carbon nanotubes to uniformly disperse; the mass concentration of the amphoteric polyacrylamide in the modified solution is 0.1 wt%, and the carbon The mass concentration of nanotubes is 0.1wt%;

[0034] (2) Soak the polypropylene filter cloth into the modified solution prepared in step (1), take it out after 1 hour, and treat it at 50°C for 1 hour;

[0035] (3) dissolving polyvinylidene fluoride in chloroform to prepare a polyvinylidene fluoride solution with a mass concentration of 0.1 wt %, and soaking the filter cloth treated in step (2) in the polyvinylidene fluoride solution for 1 hour;

[0036] (4) Irradiate the filter cloth obtained in step (3) under ultraviolet light for 20 minutes...

Embodiment 2

[0038] A preparation method of a high-performance anti-fouling modified filter cloth for a vacuum filter, comprising the following steps:

[0039] (1) Disperse polysulfonate betaine and graphene oxide in deionized water to prepare a modified solution, and ultrasonically treat the graphene oxide to uniformly disperse the graphene oxide; the mass concentration of polysulfonate betaine in the modified solution is 2wt %, the mass concentration of graphene oxide is 5wt%;

[0040] (2) Immerse the polyethylene filter cloth in the modified solution prepared in step (1), take it out after 24 hours, and treat it at 70°C for 5 hours;

[0041] (3) dissolving polyvinylidene fluoride in chloroform to prepare a polyvinylidene fluoride solution with a mass concentration of 1wt%, and soaking the filter cloth processed in step (2) in the polyvinylidene fluoride solution for 5 hours;

[0042] (4) irradiating the filter cloth obtained in step (3) under ultraviolet light for 2 hours to obtain a h...

Embodiment 3

[0044] A preparation method of a high-performance anti-fouling modified filter cloth for a vacuum filter, comprising the following steps:

[0045] (1) Disperse the amphoteric polyacrylamide and silica in deionized water to prepare a modified solution, and ultrasonically treat the silica to uniformly disperse the silica; the mass concentration of the amphoteric polyacrylamide in the modified solution is 0.4 wt%, and the two The mass concentration of silicon oxide is 0.8wt%;

[0046] (2) Soak the polyphenylene sulfide filter cloth into the modified solution prepared in step (1), take it out after 2 hours, and treat it at 60°C for 3 hours;

[0047] (3) dissolving polyvinylidene fluoride in chloroform to prepare a polyvinylidene fluoride solution with a mass concentration of 0.5wt%, and soaking the filter cloth treated in step (2) in the polyvinylidene fluoride solution for 3 hours;

[0048] (4) irradiating the filter cloth obtained in step (3) under ultraviolet light for 40 minu...

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Abstract

The invention relates to high-performance anti-scaling modified filter cloth for a vacuum filter and a preparation method of the high-performance anti-scaling modified filter cloth. The preparation process comprises the following steps: (1) dispersing an amphoteric polymer modifier and nanoparticles in deionized water to prepare a modified solution; wherein the mass concentration of the amphoteric polymer modifier is 0.1-2 wt%, and the mass concentration of the nanoparticles is 0.1-5 wt%; (2) soaking the filter cloth in the modified solution prepared in the step (1) for 1-24 hours, taking out the filter cloth, and heating the filter cloth at 50-70 DEG C for 1-5 hours; (3) preparing a polyvinylidene fluoride solution with the mass concentration of 0.1-1wt% by taking chloroform as a solvent, and soaking the filter cloth treated in the step (2) into the polyvinylidene fluoride solution for 1-5 hours; and (4) performing ultraviolet irradiation on the filter cloth treated in the step (3). The modified filter cloth provided by the invention has the advantages of high water flux, long operation time, high flux recovery rate after cleaning and the like.

Description

technical field [0001] The invention relates to a high-performance anti-fouling modified filter cloth for a vacuum filter and a preparation method thereof, belonging to the field of separation. Background technique [0002] Vacuum filter is a solid-liquid separation equipment that uses vacuum negative pressure as a driving force, and has a wide range of applications in mining, metallurgy, chemical industry, environmental protection, chemical industry, food and other fields. However, the filter cloth in the filter is easily blocked during the separation process, thereby increasing the operating cost of the enterprise, which is one of the main problems in this field. The filter slurry contains a large amount of metal ions (Na + , Fe 3+ , Mg 2+ , Ca 2+ etc.) and polyvalent salt ions (CO 3 2- , SO 4 2- , PO 4 3- Wait). These ions are precipitated as the temperature decreases during the filtration process, and then scale on the surface of the filter cloth of the vacuum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/10D06M10/06B01D39/08
CPCD06M10/10D06M10/06B01D39/083D06M2101/20D06M2101/30D06M2101/34D06M2101/32
Inventor 姚博田欣张国胜程晨王志强陈丽美韩会峰荣辉李胜王硕谢道雄史小龙李志超李仁会甄志嘉赵团真赵亮刘作亮张铁波李建超要智勇李美慧田靖王海燕
Owner HEBEI IRON & STEEL GRP MINING
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