Numerical Study On The Release Characteristics And Purification Effect Of Indoor Formaldehyde Under Different Ventilation Modes

With the progress of time,the development of society and the progress of science and technology,more and more new architectural decoration materials are used in the decoration of houses.Different kinds of materials have become the source of various pollutants that are harmful to the human body in the relative enclosed space,and formaldehyde pollution is especially prominent in the pollution.The study needs to be carried out.Research on indoor formaldehyde pollution purification,domestic and foreign research mainly concentrated on the source control and terminal treatment,source governance,mainly aimed at the source of pollution itself,such as the modification of materials,fundamentally reducing the release of formaldehyde;the traditional terminal treatment is divided into two major categories,a class of ventilation by changing the means of ventilation from indoor emptying,one is to decompose or collect formaldehyde in the air by absorption and absorption,so as to reduce the concentration of formaldehyde.There are three ways of theoretical analysis,experimental research and numerical calculation at home and abroad.This paper,starting with the end treatment,according to the two kinds of research direction,and uses numerical calculation to analyze the purification of indoor formaldehyde under various working conditions,and gives a reasonable suggestion.In this paper,a numerical method is adopted to simulate the diffusion of formaldehyde under the closed condition,and the experimental verification is carried out by using the component transport model and the turbulence model.As the initial condition,the purification of formaldehyde under three simple ventilation modes of natural ventilation,mechanical ventilation and mechanical ventilation is simulated,the eddy current area under the ventilation condition is found,and the position of the absorption source is determined and the model is determined.The purpose of the study is to study the air purification situation of different absorption sources,which are combined with natural ventilation and mechanical ventilation respectively,and give suggestions for daily air purification.The results show that after the release of formaldehyde for a period of time,a dynamic equilibrium is reached,and the concentration of formaldehyde will remain unchanged at a certain concentration under the closed condition.Through the study of the indoor air purification by different ventilation modes,it is found that the single ventilation mode can effectively reduce the indoor pollution range,but the eddy current area will be produced.Formaldehyde can not be cleaned up.The best way to deal with indoor air pollution is to use the source of purification in the process of natural ventilation.