JPH0199634A - Method for purifying polluted air - Google Patents

Abstract

PURPOSE:To increase the efficiency of purification of polluted air by filtering air near an air pollutant at a height of about 0.5m above the surface of the earthy, removing SOX and NOX with a catalyst, etc., and releasing the resulting clean air at a height of about 1m above the surface of the earth. CONSTITUTION:Air along a principal road or near other air pollutant is sucked by a fan at a height of about 0.5m above the surface of the earth, soot, dust and suspended particles in the air are filtered off and SOX and NOX in the air are removed by a catalytic reaction or other chemical reaction. The resulting clean air is released at a height of about 1m above the surface of the earth. The height is slightly lower than the height at which a human being breathes.

Description

[Detailed Description of the Invention] With the progress of industrialized society, pollution that exceeds the purification ability of nature and adversely affects human health and the living environment has occurred for a long time. One example is air pollution.

The main pollutants that cause this air pollution are sulfur oxides (sulfur dioxide SO, L, etc.) and nitrogen oxides (nitrogen dioxide
o, etc.), fallen dust and suspended particulate matter (SPM), carbon oxide (CO) and photochemical oxidants (Oxi), etc., and these are subject to the Air Pollution Control Act, each local government's pollution prevention ordinance, and the like. Environmental standards are set by environmental ordinances, but countermeasures against pollution are generally limited to methods that control the sources, and the sources of air pollution are fixed sources such as factories and workplaces. It is broadly classified into mobile sources such as automobiles and ships, and the national and local governments have taken measures for each source, with some success.

However, air pollution countermeasures to date have attempted to reduce the amount of pollution as much as possible by controlling the source itself, and total pollution control is a good example of this.

However, the above-mentioned standard values for air pollution are based on the average value of observed values at specific points within the area, and the current situation is that we are both happy and worried about the changes in these values.

However, in reality, the air pollution level within the area does not meet the standard values announced above, and the level of air pollution varies from area to area.
Although it is somewhat leveled out by wind and convection circulation, the effect is greatly affected by the depopulation of buildings, topography, etc., especially in towns along main roads where high and medium-rise buildings are lined up side by side to form a valley. In some cases, a pool of polluted air may form. This means that even in areas surrounding fixed sources of air pollution, such as factories and business establishments, there are significant differences between these areas and other areas. It can be said that K, which treats damage as a merkmar that determines an average standard value, is too unreasonable. In this way, even if the pollution level in other areas other than these areas is reduced by leaving the key areas where air pollution occurs, and the overall pollution level is reduced, what is the result to be happy about? Needless to say, this is a blind spot in air pollution countermeasures to date.

The present invention uses a fan to absorb air from around 0.5 m above the ground surface along a main road or in close proximity to other sources of air pollution, filters out soot, dust, and other suspended particulate matter, and removes sulfur oxides and nitrogen. This is related to the Air Pollution Cleaning Act, which is characterized by removing oxides through catalysts and other chemical reactions and releasing clean air that is harmless to the human body to a height of about 100 degrees above the ground. The purpose of this is to eliminate multilayered pollution in areas where it is difficult to equalize pollution with other areas, such as snowdrifts along highways lined with high-rise buildings and areas around sources of air pollution such as factories. By taking high levels of air pollution as a direct target and directly purifying them, the results of air pollution purification can be significantly improved.

The air pollution purification method according to the present invention does not target the sources themselves as in the past, but aims to directly purify air pollution in local areas where these sources overlap and are extremely polluted. The height of the fan that absorbs contaminated air is 1.5 mm above ground level, which is commonly used in conventional measurement methods.
It is not 5 meters high, but much lower than this, 0.0 meters above the ground.
It is approximately 5 meters high, and this height is the height of the exhaust pipe of an ordinary or small passenger car, and it is also the height that is optimal for absorbing and eliminating smoke, dust, and other suspended particulate matter, as well as sulfur oxides and nitrogen oxides. In addition, the air is clean, with the suspended particulate matter filtered out, and sulfur oxides and nitrogen oxides removed through catalysts and other chemical reactions, at a height of about 1 meter above the earth's surface, which is slightly lower than the height at which humans breathe. Since the setting is such that the discharge is performed at a height of

As described above, the Air Pollution Cleaning Act according to the present invention is not in conflict with the methods of controlling sources of pollution under the Air Pollution Control Act, the pollution control ordinances of local governments, or the environmental ordinances that have been enforced in the past, but is in line with these. These should be carried out in parallel, and should be carried out in conjunction with locations where air pollution is concentrated, which could not be resolved by controlling fixed sources such as factories and workplaces, or mobile sources such as automobiles and ships. In other words, it directly contributes to resolving areas with particularly high levels of air pollution, such as areas along main roads lined with mid-to-high-rise buildings, or industrial areas lined with factories, etc., and is effective in purifying air pollution. There is much to contribute.

In the present invention, there is no particular mention of the atmospheric suction/exhaust device, the filter device attached thereto, the catalyst or other purifying device using chemical reactions, and these can be easily solved using known techniques. be.

Claims (1)

[Claims] (1) Along main roads and in close proximity to other sources of air pollution, a fan absorbs air approximately 0.5 m above the ground surface, filters out soot, dust, and other suspended particulate matter, and removes sulfur oxides and nitrogen. An air pollution purification method that removes oxides through catalysts and other chemical reactions and releases clean air that is harmless to the human body to a height of about 1 meter above the ground.