Negative ion air purification method in highway tunnel

Abstract

The invention provides a negative ion air purification method for a highway tunnel. A negative ion dropping and removing scheme is adopted, and the mechanism that negative ions can have a chemical reaction with poisonous and harmful gases, such as NOx, SO2, H2S and VOCs, and tail gas, dust, germs and the like are gathered into large particles to be dropped and removed is utilized. In reference to tunnel construction or the harmful gas concentration distribution situation, researched negative ion generation devices are installed at the proper positions on the two sides or the single side of a tunnel and distributed in a strip shape or three-dimensionally, and the negative ion generation devices are matched with construction.

Description

technical field [0001] The invention relates to an air purification method, in particular to a negative ion air purification method for road tunnels. Background technique [0002] At present, there are three main methods for purifying air in tunnels. The tunnels in our country mainly adopt the ventilation method for the purpose of diluting the concentration of harmful pollutants, followed by the electrostatic dust removal method and the purification method of gaseous pollutants. (1) In terms of traditional ventilation and purification research, many domestic scholars have conducted research on tunnel construction ventilation. (2) In terms of electrostatic dust removal, there is no tunnel in my country that uses ESP technology. For example, Southwest Jiaotong University and Tongji University have conducted research on the use conditions and installation methods of road tunnel electrostatic precipitators. (3) In terms of purification of gaseous pollutants, Chongqing Univers...

AI Technical Summary

Problems solved by technology

(1) In terms of traditional ventilation and purification research, many domestic scholars have conducted research on tunnel construction ventilation

(2) In terms of electrostatic dust removal, there is currently no tunnel in my country that uses ESP technology

(3) In terms of purification of gaseous pollutants, Chongqing University and the Sichuan Communications Department have jointly developed a tunnel air purification electrostatic precipitator. The air purification electrostatic precipitator using pulsed corona discharge technology is tested indoors for nitric oxide, nitrogen oxides, and sulfur dioxide. However, due to low working wind speed, small processing flow, large volume, and cost, its application in actual tunnels is limited.

[0007] 1) Single ventilation sometimes cannot dilute the pollutant concentration to within the allowable value;

[0008] 2) The cost of tunnel ventilation is proportional to the square of the length of the tunnel, the investment cost is high, the operation cost is high, and the effect is not good;

[0009] 3) Ventilation method is the transfer of pollutants, causing secondary pollution;

[0010] 4) Usually most of the time in the tunnel, the oxygen content required by the human body and machinery is normal, but the concentration of dust and harmful gases is relatively high. The traditional ventilation function is to accelerate the dilution of the concentration of harmful gases and consume a lot of electric energy

[0011] 5) During the construction cycle of the tunnel under construction, the concentration of harmful gases cannot be quickly reduced to below the relevant national standards, and construction personnel cannot enter the site in time or exceed the standard for work, seriously affecting the construction progress and increasing costs

[0015] 2) There are huge differences in the source and magnitude of pollutants

[0016] 3) Huge difference in magnitude of space

[0018] 5) The calculation method cannot be copied

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