Is window ventilation the fastest way to remove methanol?

Ventilation is a common method to remove formaldehyde. However, there are some skills in ventilation, which does not mean that we just need to open the window. If the ventilation method is not correct, it will be difficult for formaldehyde to be discharged outdoors, which will lead to the harm of formaldehyde when we live in a new house. So, what is the correct method of ventilation to formaldehyde?

Rumor of opening a window to ventilate formaldehyde

1. Excessive ventilation will lead to furniture deformation and gypsum putty cracking.

Well, it is undeniable that this may happen in winter in the cold areas of the north. Indoor heating is dry, outdoor snowflakes are floating, and the temperature difference between inside and outside is too large. It is understandable that similar problems appear, but please don't make general propaganda about things in a specific time and region. If the temperature difference between inside and outside is not big, ventilation will make the furniture deform and crack, so we can only go to the decoration company and furniture factory.

2. Heat the seal during the day, and the ventilation will be faster at night.

Just like the principle of ventilation after sealing for a period of time, it has been unable to keep up with rapid ventilation, but what I want to talk about here is the problem of heating. The boiling point of formaldehyde is-19.5℃. As long as it is higher than this temperature, formaldehyde will volatilize. Is your home in the North Pole?

The room temperature can be lower than-19.5℃, and even the higher the temperature, the faster the formaldehyde volatilizes. It's true, but it's cold in winter in the north, and there is no need for heating at other times and in the south. And even in the northern region, the temperature difference between inside and outside is very large, so furniture and walls should be worried. Why?

How to strengthen ventilation correctly?

Ventilation is to open the window as much as possible when the weather permits (of course, winter in the north can also be moderate, depending on the situation), and quantitative change determines qualitative change. Good ventilation can naturally play a good purification effect. In addition, for poorly ventilated houses or rooms, fans can be used to strengthen ventilation, so that indoor and outdoor air convection exchange is faster and the purification speed can be increased several times.

How can we really speed up in addition to formaldehyde?

1: Window ventilation method

Evaluation: It is convenient, but the newly renovated VOC, such as formaldehyde, has been released in large quantities at least 1 year, and the outdoor air pollution is also very serious. Whether it is high at home or outside needs specific analysis. In addition, it is difficult to ventilate for a long time at night, in bad weather and in winter.

2. Adsorption type (diatom mud, activated carbon)

Evaluation: Short-term effectiveness (effectiveness depends on pollution level). In short, the adsorption life is very small compared with the release time of VOC (volatile organic compounds) such as formaldehyde. Moreover, continuous and frequent replacement is unrealistic for ordinary families, which is cheap in the short term and will increase in the long term. The accumulation of activated carbon and the like will affect the indoor environment.

3. Photocatalyst, biological enzyme and air purification catalyst

Evaluation: The level is uneven, and there is good and well-known garbage. The key is that there is a strong technical research platform behind it and there are many successful cases. Among them, the air purification catalyst is a comprehensive environmental protection, including photocatalyst components, plant aldehyde removal elements, biological enzymes and so on. Add, do not rely on light, decompose harmful gases for 24 hours, and the cost performance is higher than that of simple photocatalyst and biological enzyme.

4: Thermal catalysis and plasma (air purifier)

The processing space is limited, the range of several square meters around the instrument is effective, the long-term operation cost is high, and the accessories need to be replaced regularly.

Small coup of self-test formaldehyde

Formaldehyde self-test box generally consists of brown bottle diluent, transparent bottle developer and a reaction box filled with powder. Before the test, the doors and windows of the room to be tested should be closed for one hour, and the diluent should be poured into the reaction box to fully dissolve it with the reactants. The reaction box should be placed indoors at a height of 80 ~ 150cm from the ground, exposed for 30 minutes, then poured with the chromogenic agent, tightened the bottle cap, shaken well, let stand for 10 minutes, then opened, and compared with the colorimetric scale card of the self-test box.

Yellow basically does not contain formaldehyde, yellow-green does not exceed the standard, yellow-green is not serious, green is a bit excessive, and blue is excessive. Although this method is simple, the accuracy rate is not up to 100%, and only a rough test can be done.

When we ventilate in addition to formaldehyde, we don't have to worry that long-term ventilation will deform the newly decorated furniture. It is also incorrect to think that heating and sealing during the day will lead to faster ventilation at night. We should properly ventilate to remove formaldehyde, strengthen the effect of ventilation, and let indoor formaldehyde be discharged to the outside as soon as possible.