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Filter medium, filter element and preparation method for removing lead in drinking water

A technology for filtering media and drinking water, applied in the fields of filtration and separation, separation methods, chemical instruments and methods, etc., can solve the problems of difficult treatment, accelerated erosion and aging of lead-containing water pipes, secondary pollution, etc., to achieve simple methods and avoid damage. , the effect of high removal rate

Active Publication Date: 2016-01-13
潘峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, lead pollution in drinking water is widespread in our country, and urban tap water pipes are mostly selected from lead-containing metal pipes; water plants use chlorine as a sterilizing agent to accelerate the erosion and aging of lead-containing water pipes; and the trial period exceeds 5 years Increased release of lead from water pipes and elevated lead concentrations in water
And long-term consumption of leaded food, lead accumulates in the human body and is not easy to discharge, which will lead to the above-mentioned series of problems
[0005] The traditional sand filtration and microfiltration water treatment processes are not effective in the treatment of lead and cannot effectively remove lead; the ion exchange method is cumbersome, and it is difficult to treat the flushing water after replacement saturation; the reverse osmosis method is troublesome to use, wastes water, electricity, and costs High, the discharged concentrated solution is not easy to handle, and it is easy to cause secondary pollution; and the precipitation method also has the problem of difficult treatment

Method used

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  • Filter medium, filter element and preparation method for removing lead in drinking water

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preparation example Construction

[0019] The invention provides a method for preparing a filter medium for removing lead in drinking water, comprising the following steps:

[0020] a) Ultra-high molecular weight polyethylene powder, activated carbon powder, molecular sieve powder, zeolite powder and pore-forming agent are mixed to obtain a mixture, the weight of the ultra-high molecular weight polyethylene powder, activated carbon powder, molecular sieve powder, zeolite powder and pore-forming agent The ratio is 150~300:50~100:100~150:100~150:100~150;

[0021] b) pressing, sintering and cooling the mixture obtained in step a) in a mould.

[0022] The present invention first mixes ultra-high molecular weight polyethylene powder, activated carbon powder, molecular sieve powder, zeolite powder and a pore-forming agent to obtain a mixture. The weight ratio is 150~300:50~100:100~150:100~150:100~150; preferably 160~280:60~90:110~140:110~140:110~140; more preferably 170~ 270:65~85:120~130:120~130:120~130.

[0023]...

Embodiment 1

[0048] (1) Take ultra-high molecular weight polyethylene powder 150g, described ultra-high molecular weight polyethylene is the M-I type product of Beijing Dongfang Petrochemical Co., Ltd. Auxiliary No. 2 Factory, and its molecular weight is 1.5 million;

[0049] (2) Take by weighing medical active carbon powder 50g, the specific surface area of ​​described medical active carbon is 800m 2 / g;

[0050] (3) taking by weighing aperture is 100g of molecular sieve powder of 20nm;

[0051] (4) Modified zeolite powder 100g, modifier is NaCl is 0.8mol / L and HCl is the mixed solution of 0.09mol / L, modification treatment 5h;

[0052] (5) Weigh 100g of pore forming agent;

[0053] (6) Put the above five kinds of powders into a mechanical stirrer and stir for 10 minutes to mix evenly;

[0054] (7) Fill the mixed powder into a tubular mold, press under a hydraulic pressure of 0.7 MPa, and sinter at a temperature of 260° C. for 120 minutes;

[0055] (8) Naturally cool to 50° C. and then...

Embodiment 2

[0058] (1) Take ultra-high molecular weight polyethylene powder 200g, described ultra-high molecular weight polyethylene is the M-III type product of Beijing Dongfang Petrochemical Co., Ltd. Auxiliary No. 2 Factory, and its molecular weight is 3.5 million;

[0059] (2) Take by weighing medical active carbon powder 75g, the specific surface area of ​​described medical active carbon is 1500m 2 / g;

[0060] (3) taking by weighing aperture is 120g of molecular sieve powder of 40nm;

[0061] (4) Modified zeolite powder 120g, modifier is NaCl is 0.8mol / L and HCl is the mixed solution of 0.09mol / L, modification treatment 5h;

[0062] (5) Take 120g of pore forming agent;

[0063] (6) Put the above five kinds of powders into a spiral agitator and stir for 10 minutes to mix evenly;

[0064] (7) Fill the mixed powder into a tubular mold, press under a hydraulic pressure of 0.6MPa, and sinter at a temperature of 280° C. for 130 minutes;

[0065] (8) Naturally cool to 50° C. and then r...

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Abstract

The invention provides a preparation method of a filtering medium for removing lead from drinking water. The preparation method comprises the following steps of (a) mixing ultra high molecular weight polyethylene powder, activated carbon powder, molecular sieve powder, zeolite powder and a pore-forming agent to obtain a mixture, wherein a weight ratio of ultra high molecular weight polyethylene powder to activated carbon powder to molecular sieve powder to zeolite powder to pore-forming agent is 150-300:50-100:100-150:100-150:100-150; and (b) pressing the mixture obtained by the step (a) in a mold, sintering and cooling. Under a synergistic effect of the above raw materials, the prepared filtering medium has high removal rate for lead in water. The method is simple. The filter core rather than powder is used, so that no subsequent treatment is needed. The filtering medium is suitable for treatment of household terminal water. Detections show that the removal rate of the filtering medium for the lead in the drinking water is over 99.6%.

Description

technical field [0001] The invention relates to a filter medium for removing lead in drinking water and a preparation method thereof, a filter element, a water purification device and a water dispenser composed of the filter medium. Background technique [0002] my country is the world's largest lead producer and consumer. Lead is one of the heavy metals known to be the most toxic and highly toxic in accumulation. Long-term accumulation can seriously damage nerve cells and the brain. It can lead to high blood pressure, heart disease, kidney and immune system diseases and many other aspects. Children are extremely sensitive to this, which will cause IQ and hearing loss, as well as some behavioral disorders such as ADHD, resulting in decreased learning ability and incoordination of hand-eye movements. The use of leaded gasoline and paint can lead to decreased bone density and cognitive decline in the elderly. [0003] Lead damages tissue in two ways: one is by interfering ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/00B01J20/26B01J20/30C02F1/00C02F1/28C02F101/20
Inventor 潘峰栾仁堂
Owner 潘峰