Phosphorous removal and bacterium control type PP cotton filter element and preparation method thereof

A cotton filter and bacteria-type technology, applied in the field of water purification, can solve the problems of high bacterial concentration and a large number of bacteria, and achieve the effects of reducing the total phosphorus concentration, avoiding the increase of bacterial concentration, and inhibiting growth and reproduction

Inactive Publication Date: 2019-01-25
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a prominent problem is that after the activated carbon is saturated, a large number of bacteria will grow on the surface of the activated carbon and inside the pores, which will eventually lead to a high concentration of bacteria in the effluent of the water purifier.

Method used

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  • Phosphorous removal and bacterium control type PP cotton filter element and preparation method thereof
  • Phosphorous removal and bacterium control type PP cotton filter element and preparation method thereof
  • Phosphorous removal and bacterium control type PP cotton filter element and preparation method thereof

Examples

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preparation example Construction

[0029] The preparation method of the above-mentioned phosphorus removal and bacteria control type PP cotton filter element comprises the following steps:

[0030] ⑴. Polypropylene raw materials (particles with a particle size of 0.5-2mm) are melted at a temperature of 166-200°C, and Fe(NO 3 ) 3 ·6H 2 O and La(NO 3 ) 3 ·6H 2 O powder and fully stirred, mechanical stirring speed is controlled at 150-200rpm, polypropylene melt, Fe(NO 3 ) 3 ·6H 2 O, La(NO 3 ) 3 ·6H 2 The mass ratio of O added is 100:(1~10):(1~10);

[0031] (2) Extrude the mixed solution obtained in step (1) through a wire drawing machine, then immerse it in 1-5% sodium hydroxide solution for 5-10 minutes, take it out and dry it to obtain iron lanthanum modified polypropylene fiber filaments, and set aside;

[0032] ⑶. The dry iron lanthanum modified polypropylene fiber obtained in step ⑵ is drawn and pressed to form a tubular filter element. The specifications of the tubular filter element are 5 inches,...

Embodiment 1

[0035] A preparation method for phosphorus removal and bacteria control type PP cotton filter element, the steps comprising:

[0036] ⑴. Polypropylene particles (particles with a particle size of 0.5-2mm) are melted at a temperature of 166°C, and Fe(NO 3 ) 3 ·6H 2 O and La(NO 3 ) 3 ·6H 2 O powder and fully stirred, mechanical stirring speed is controlled at 150rpm, polypropylene particles, Fe(NO 3 ) 3 ·6H 2 O, La(NO 3 ) 3 ·6H 2 The mass ratio of O added is 100:1:1 (the mass of polypropylene particles is 200g, Fe(NO 3 ) 3 ·6H 2 The mass of O is 2g, La(NO 3 ) 3 ·6H 2 The quality of O is 2g);

[0037] ⑵. After the mixed solution is extruded by a wire drawing machine, it is immersed in 1% sodium hydroxide solution for 5 minutes, taken out and dried, and set aside;

[0038](3) The dry iron-lanthanum-modified polypropylene fiber obtained in step (2) is drawn and pressed into a 5-inch tubular filter element.

[0039] The municipal tap water in Tianjin Binhai New Are...

Embodiment 2

[0041] A preparation method for phosphorus removal and bacteria control type PP cotton filter element, the steps comprising:

[0042] ⑴. Polypropylene particles (particles with a particle size of 0.5-2mm) are melted at a temperature of 180°C, and Fe(NO 3 ) 3 ·6H 2 O and La(NO 3 ) 3 ·6H 2 O powder and fully stirred, mechanical stirring speed is controlled at 200rpm, polypropylene particles, Fe(NO 3 ) 3 ·6H 2 O, La(NO 3 ) 3 ·6H 2 The mass ratio of O added is 100:5:1 (the mass of polypropylene particles is 200g, Fe(NO 3 ) 3 ·6H 2 The mass of O is 10g, La(NO 3 ) 3 ·6H 2 The quality of O is 2g);

[0043] ⑵. After the mixed solution is extruded by a wire drawing machine, it is immersed in 2% sodium hydroxide solution for 10 minutes, taken out and dried, and set aside;

[0044] ⑶. The dry iron lanthanum modified polypropylene fiber obtained in step ⑵ is drawn and pressed to form an 8-inch tubular filter element.

[0045] The municipal tap water in Tianjin Binhai New...

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Abstract

The invention relates to a phosphorous removal and bacterium control type PP cotton filter element and a preparation method thereof. The preparation method comprises the following steps of uniformly dispersing Fe(NO3)3.6H2O and La(NO3)3.6H2O powder with a certain ratio into polypropylene molten at the temperature of 166-200 DEG C, performing wire jetting with a wire drawing machine, soaking wiresinto a sodium hydroxide solution with the concentration being 1-5 percent, producing Fe(OH)3 and La(OH)3 particles on the surfaces of polypropylene fibers in situ, and performing traction and pressingon the nano-particle loaded polypropylene fiber filaments to prepare a tubular filter element. The filter element removes phosphorus nutritive salt in water through adsorption to achieve the purposeof inhibiting growth of bacteria, and thus solving the problem that the concentration of the bacteria is increased in the long-time use process of a domestic water purifier.

Description

technical field [0001] The invention belongs to the technical field of water purification, and relates to a phosphorus-removing and bacteria-controlling PP cotton filter element and a preparation method thereof. Background technique [0002] Drinking water safety involves the most basic issues of people's livelihood, and has attracted more and more people's attention. With the continuous development of science and technology, household water purifiers have gradually entered thousands of households and played a very important role in people's daily life. At present, most of the water purifiers on the market will have an increase in bacterial content during use. If the filter element is not replaced for a long time, sometimes there will be an abnormal situation in which the bacterial concentration of the effluent is greater than that of the influent. The idea of ​​bacteria control in traditional water purifiers is mainly to use activated carbon adsorption technology to reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01D39/16B01D39/20C02F1/00C02F1/50
CPCB01D39/14B01D39/1623B01D39/2068B01D2239/0442B01D2239/10C02F1/001C02F1/50
Inventor 郝林林辛旺李桂菊
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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