Airflow-fog drop-dust three-phase medium coupling sedimentation experimental device and method

Abstract

The invention discloses an airflow-fog drop-dust three-phase medium coupling sedimentation experimental device and method. The device comprises a simulation pipeline made of organic glass; the simulation pipeline is provided with an air inlet and an air outlet and is provided with a dust emitter close to the air inlet, and the other end of the simulation pipeline is provided with a water mist nozzle which is opposite to the dust emitter; the simulation pipeline is evenly provided with a plurality of gaps in a part corresponding to a coupling sedimentation area; a laser detection area is formed in each gap; two laser doppler interferometers are arranged at the two sides of the simulation pipeline and can be used for scanning the corresponding laser detection areas. With the device and the method, airflow-fog drop-dust three-phase medium coupling sedimentation can be simulated in a spray field in the atmospheric environment, the dust fall effects of different types of nozzles can be tested, and a technical support is provided for developing a high-efficiency nozzle; the number and the positions of the nozzles which are opened can be selected, so that a technical support is provided for developing a high-efficiency spraying device.

Description

technical field [0001] The invention relates to an experimental device and method for coupled settlement of wind flow-fog droplet-dust three-phase medium. Background technique [0002] In recent years, the phenomenon of smog weather has increased day by day, which has significantly reduced the air quality and seriously affected people's physical and mental health. First of all, PM 2.5 in the smog threatens the health of newborns. In foggy days, the sun is reduced, children are not exposed to ultraviolet rays, vitamin D production is insufficient, calcium absorption is greatly reduced, and children's growth slows down. Secondly, the composition of haze is very complex. It can directly enter and adhere to the human respiratory tract and alveoli, causing acute rhinitis and acute bronchitis. If left in this environment for a long time, it can also induce lung cancer. Thirdly, there are many pollutants and low air pressure in the haze weather, which can easily induce acute attac...

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Problems solved by technology

The particle size of spray droplets is affected by many factors, among them, the arrangement method of droplet measuring points in spray field, the type, position and quantity of nozzles, the particle size and velocity of droplets, and the influence of wind speed on coupling dust fall The research is particularly important, but the dust reduction technology studied by domestic and foreign scholars is limited in the arrangement of measuring points, the type, position and number of nozzles, the particle size and velocity of fog droplets, and the experimental device and method of three-phase medium coupling settlement by adding wind flow. Less research, lack of theoretical and experimental basis in general

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