Formaldehyde absorbing particles for air purifier and preparation method of formaldehyde absorbing particles

An air purifier and formaldehyde absorption technology, which is applied in the field of air purification, can solve the problems of secondary release, high price of activated carbon, and high cost of filter screens, and achieve the effects of low cost, high specific surface area, and reduced production costs

Inactive Publication Date: 2015-05-06
GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, activated carbon and its products are mainly used as solid adsorbents, which only have a strong adsorption effect on non-polar or weakly polar substances, but have a small adsorption capacity for highly polar formaldehyde. It is easy to be released again under certain environmental conditions, causing secondary pollution
Moreover, the price of activated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix high-chlorinated polyethylene and ethylenediamine at a mass ratio of 1:5 at 25°C and stir for one hour, then wash the reaction product with distilled water, and perform suction filtration. The reaction product after suction filtration is then washed with ethanol Wash until the lotion is colorless and transparent, filter with suction, and dry the filter residue in an oven for 48 hours at a drying temperature of 120°C. After drying, the dry matter obtained is ground into a 300-mesh powder with a ball mill, and the powder is mixed with 100-mesh diatomaceous earth Stir and mix evenly according to the mass ratio of 1:3, granulate with a granulator to make 2-3mm particles, fill 130 grams of the particles into the mesh holes of a plastic-based honeycomb filter, and make a formaldehyde-removing filter network. Use 10m 3 Air chamber test formaldehyde removal effect, the initial concentration of formaldehyde in the air chamber is 1.0mg / m 3 , Turn on the air purifier, the ai...

Embodiment 2

[0021] Mix high-chlorinated polyethylene and ethylenediamine at a mass ratio of 1:5 at 25°C and stir for one hour, then wash the reaction product with distilled water, and perform suction filtration. The reaction product after suction filtration is then washed with ethanol Wash until the lotion is colorless and transparent, filter with suction, and dry the filter residue in an oven for 48 hours at a drying temperature of 120°C. After drying, the dry matter obtained is ground into a 300-mesh powder with a ball mill, and the powder is mixed with 100-300-mesh silicon The algal earth is stirred and mixed evenly according to the mass ratio of 1:5, and granulated with a granulator to make 2-3mm particles, and 130 grams of the particles are filled in the mesh of a plastic-based honeycomb filter to make a detoxification filter. Formaldehyde filter. Use 10m 3 Air chamber test formaldehyde removal effect, the initial concentration of formaldehyde in the air chamber is 1.0mg / m 3 , Turn...

Embodiment 3

[0023] Mix high-chlorinated polyethylene and ethylenediamine at a mass ratio of 1:5 at 25°C and stir for one hour, then wash the reaction product with distilled water, and perform suction filtration. The reaction product after suction filtration is then washed with ethanol Wash until the lotion is colorless and transparent, filter with suction, and dry the filter residue in an oven for 48 hours at a drying temperature of 120°C. After drying, the dry matter obtained is ground into a 300-mesh powder with a ball mill, and the powder is mixed with 100-mesh diatomaceous earth Stir and mix evenly at a mass ratio of 1:8, granulate with a granulator to make 2-3mm particles, fill 130 grams of the particles into the mesh holes of a plastic-based honeycomb filter, and make a formaldehyde-removing filter network. Use 10m 3 Air chamber test formaldehyde removal effect, the initial concentration of formaldehyde in the air chamber is 1.0mg / m 3 , Turn on the air purifier, the air volume thr...

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Abstract

The invention discloses a formaldehyde absorbing particles for an air purifier and a preparation method of the formaldehyde absorbing particles. The preparation method comprises the following steps: mixing high chlorinated polyethylene and ethidene diamine in a mass ratio of 1:5 and stirring to react; then, washing a reaction product by distilled water; then washing the reaction product by ethanol until the lotion is colorless and transparent; filtering, drying the filter residues and grinding into powder; uniformly mixing the powder and diatomite in a mass ratio of 1:(3-8); and granulating the powder until the particle diameter of particles is 2-3mm, so as to obtain the formaldehyde absorbing particles for the air purifier. The formaldehyde absorbing particles disclosed by the invention have relatively high porosity and specific surface area and formaldehyde in air passing through a filter screen is conveniently contacted with the surfaces of the particles, so that formaldehyde absorbing reaction is facilitated and an aminated polymer in the formaldehyde absorbing particles for the air purifier can form stable Mannich base by virtue of chemical action, so that the concentration of formaldehyde is effectively reduced, and the pollution caused by secondary release is avoided; and the cost is low.

Description

Technical field: [0001] The invention belongs to the field of air purification, and in particular relates to formaldehyde-absorbing particles used in air purifiers and a preparation method thereof. Background technique: [0002] Formaldehyde is defined as carcinogenic and teratogenic shape material by the World Health Organization, is the allergen of generally acknowledging, also is one of potential strong mutagen. [0003] Studies have shown that: formaldehyde has strong carcinogenic and short cancer effects. The lot of documents record, formaldehyde mainly shows aspects such as allotriosmia, stimulation, allergy, abnormal pulmonary function, dysfunction of liver and immunologic dysfunction to health effects. When its concentration reaches 0.06-0.07mg / m3 in every cubic meter of air, children will have mild asthma. When the formaldehyde content in the indoor air is 0.1mg / m3, peculiar smell and sense of discomfort are just arranged; When reaching 0.5mg / m3, can stimulate eye...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01D53/02
CPCB01J20/26B01D53/02B01D2253/202B01D2257/70B01J20/3028
Inventor 郑煜基
Owner GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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