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Preparation method of folding filter element capable of removing heavy metals

A folded filter element, heavy metal technology, applied in chemical instruments and methods, filtration treatment, adsorption water/sewage treatment, etc. To achieve the effect of reducing waste liquid discharge, efficient and stable removal effect, and easy large-scale production

Pending Publication Date: 2022-01-04
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has many steps and complicated process, and the active groups grafted by plasma technology have poor uniformity and stability
[0005] At present, the following problems commonly exist in the existing heavy metal removal materials: First, the preparation process is complicated and the cost is high: firstly, it needs to be prepared into fibers, membrane filaments or ion exchange resins, and then made into filter elements. The process is complicated and there are many links. Second, the material preparation process uses a large amount of organic solvents, and will produce a large amount of organic waste liquid and waste gas, which will pollute the environment; third, activated carbon and adsorbent are mainly combined by physical bonds, the binding ability is weak, and there are adsorption problems. The problem of agent loss, the performance stability of the filter element is at risk

Method used

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  • Preparation method of folding filter element capable of removing heavy metals
  • Preparation method of folding filter element capable of removing heavy metals
  • Preparation method of folding filter element capable of removing heavy metals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, first utilize the melt-blown equipment to prepare the non-woven fabric of polytrimethylene terephthalate; The above-mentioned non-woven fabric is put into concentration and is 10%, and temperature is in the chitosan aqueous solution of 90 ℃, after reacting for 24h, take out ; Wash the reacted non-woven fabric with pure water at 40°C for 10 minutes; put the rinsed non-woven fabric in an oven at 60°C for 30 minutes; make the dried non-woven fabric into a folded filter element.

[0020] The pleated filter element in this embodiment is a relatively common structure on the market, basically including a central rod, a shell, and a filter membrane between the central rod and the shell. The filter membrane here is made of modified non-woven fabric. The folds form pleats with pleat valleys at the base central stem, pleat peaks that touch the shell, and the legs of the pleat peaks.

[0021]

Embodiment 2

[0022] Embodiment 2, at first utilize melt-blown equipment to prepare the body non-woven fabric of polybutylene terephthalate; The above-mentioned filter element is put into concentration and is 5%, and temperature is in the aqueous solution of ethylenediaminetetraacetic acid of 70 ℃, reacts After 8 hours, take it out; wash the reacted filter element in 60°C pure water for 20 minutes; put the rinsed filter element in a 60°C oven to dry for 30 minutes; make the dried non-woven fabric into a folded filter element;

[0023]

[0024]

Embodiment 3

[0025] Embodiment 3, first utilize melt-blowing equipment to prepare the non-woven fabric of polycarbonate; Put the above-mentioned filter element into the aqueous solution of nitrilotriacetic acid with a concentration of 10% and a temperature of 80°C, and take it out after reacting for 12 hours; Wash the filter element in pure water at 60°C for 15 minutes; put the rinsed filter element in a 60°C oven to dry for 30 minutes; make the dried non-woven fabric into a folded filter element;

[0026]

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PUM

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Abstract

A preparation method of a folding filter element capable of removing heavy metals is characterized by comprising the following steps: (1) preparing a non-woven fabric from a fibrous polymer by utilizing melt-blowing equipment or electrostatic spinning equipment; (2) immersing the non-woven fabric into a reaction solution containing a heavy metal adsorbent for reaction to obtain a modified non-woven fabric; (3) washing the reacted non-woven fabric with pure water and drying; and (4) making the dried modified non-woven fabric into the folding filter element. Compared with the prior art, the folding filter element has the advantages that the removal effect is efficient and stable, the service life is long, the whole manufacturing process is simple, convenient and rapid, the cost is low, and large-scale production is easy to realize.

Description

technical field [0001] The invention relates to a preparation method of a water purification filter element material, in particular to a preparation method of a filter element capable of removing heavy metals. Background technique [0002] At present, the filter materials for removing heavy metals are mainly composed of the following categories: fibers, resins, separation membranes and activated carbons, fibers such as chelating fibers, or fiber filter materials prepared by other methods; resin modified ion The exchange resin has a certain function of removing heavy metals; the separation membrane is prepared by phase inversion, and the adsorbent is introduced to the surface of the separation membrane (such as a hollow fiber membrane), so as to realize the function of removing heavy metals. Activated carbon achieves the function of removing heavy metals by modifying the carbon powder or introducing an adsorbent during the sintering process. [0003] The Chinese invention pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/00C02F101/20
CPCC02F1/288C02F1/001C02F2101/20
Inventor 林春儿胡帆郭耀申卜凡敏陈承刘戈茅忠群诸永定
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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