China successfully operated the chimney 'filter' air pollution

China has inaugurated and put into use the giant chimney test of 200 feet (61 meters) to absorb polluted air and release clean air, the US Digitaltrends.com (DTC) news site on March 13 updated. .

According to DTC, this giant chimney is also called, the world's largest and oldest building, built in Xi'an City, Shaanxi Province, to deal with severe air pollution. It is estimated that air pollution in Chinese cities is the culprit causing 350,000 to 400,000 premature deaths each year. Among these, Xi'an, the hometown of Qin Shihuang Emperor, is one of the most polluted cities in China today.

SALSCS air filter tower in Xi'an, China.

Unlike most other chimneys, this smoke tower does not increase air pollution, but it serves to filter outdoor air, remove harmful substances and release fresh air back into space.

The chimney is designed to 'filter' suspicious particles called PM2.5, which are microscopic particles of less than 2.5 micrometers, which are very dangerous for the respiratory system, increasing the risk of death. died of cardiovascular disease.

Solar powered air filter system.

According to Professor David YH Pui, who participated in the project, the air purification tower named The Solar-Assisted Large-Scale Cleaning System , short for SALSCS, is Round cylindrical tower uses the principle of green house with radial glass panels.

The principle of SALSCS operation can be summarized as follows, solar energy heats the surrounding air and rolls it under the glass panels, warm air is pressurized to go towards the center of the tower thanks to the suction effect. A filtration system is placed around the entrance to the tower to remove PM2.5 pollutants, so only clean air escapes on the top of the tower. By installing SALSCS towers in major cities, it will filter contaminated air, reduce PM2.5 concentrations. SALSCS glass panels are coated with nanoparticles to remove nitrogen oxide, one of the 'precursors' and ozone.

Installing SALSCS towers in major cities, it will filter the polluted air, reduce PM2.5 concentration.

Although the official result has not been announced yet, this $ 2 million project has brought positive results. The test showed that the concentration of PM2.5 was reduced by 19% in the 10-square-kilometer area surrounding the SALSCS tower in Xi'an, compared to other areas of the city.

Predicted, the team hopes to build another large SALSCS tower in Xi'an, 1,000 feet tall (about 305m) and then build more similar works in other Chinese cities, before Aiming to export abroad.