An indoor volatile organic compound removal device based on thermal desorption and cold extraction

Abstract

The invention discloses an indoor-volatile-organic-contaminant removing device based on thermal desorption and cooling extraction. The indoor-volatile-organic-contaminant removing device comprises a roller supporting unit, a thermal desorption unit, a cooling extraction unit and a nanometer adsorption degradation unit; the roller supporting unit is used for loading a solid-phase extraction coatingand providing rotating power; the thermal desorption unit is used for heating samples and promoting desorption of volatile organic contaminants inside the samples; the cooling extraction unit is usedfor keeping an extraction fiber coating at a low temperature by injecting liquid carbon dioxide, and increasing the extraction quantity of the volatile organic contaminants by the solid-phase extraction coating; the nanometer adsorption degradation unit is used for extracting the organic contaminants volatilized by the samples, and therefore rapid removing of the volatile organic contaminants inside the indoor walls is achieved. The indoor-volatile-organic-contaminant removing device has comprehensive advantages that intelligent controlling is achieved, recycling can be achieved, the indoor volatile organic contaminants are effectively governed, and the living environment is beautified.

Description

technical field [0001] The invention relates to indoor environment purification, in particular to an indoor volatile organic compound removal device based on thermal desorption and cold extraction. Background technique [0002] The continuous large-scale development of construction real estate, accompanied by a large number of house renovations, has led to increased indoor pollution. According to data, currently 68% of human diseases are related to indoor pollution, and formaldehyde is an important indoor pollutant. The furniture, boards, carpets, paints and even adhesives that are inevitably used in home decoration all use formaldehyde as a component, and long-term exposure to low-dose formaldehyde can cause chronic respiratory diseases, memory decline in adolescents, fetal deformities and cancer and many other diseases. If the indoor temperature is around 22 degrees, the amount of formaldehyde released by the tested households is mostly in the critical state. Once the r...

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Problems solved by technology

[0003] In order to remove formaldehyde, in the prior art, scheme one: use activated carbon, but it has the following defects. The dealdehyde period of activated carbon is only about 20 days. Formaldehyde is adsorbed, but there is a risk of secondary release; Option 2: Use photocatalyst, but it has the following defects, it is highly dependent on ultraviolet rays, and normal sunlight exposure cannot meet the pro-oxidation standard, especially at night, it basically does not have the ability to remove formaldehyde ;Scheme 3: Use air purifiers, but have the following defects. Air purifiers rely on activated carbon filters to remove aldehydes, which have the same problems as activated carbons.

[0004] Most of the existing formaldehyde removal technologies are aimed at the volatilized formaldehyde, and no method has been found to remove the formaldehyde hidden inside the wall, and the long-term slow volatilization of latent formaldehyde inside the human body is more likely to be ignored.

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