Denitrification apparatus and denirification equipment for tunnel

Abstract

A denitrification apparatus in which even when it is installed in such a space that the height-direction or width-direction dimension, based on the tunnel extension direction, is small, the wind velocity distribution of an exhaust gas in the plane of a denitrifying agent incorporated in each denitrifying-agent unit is even. The removing performance of the denitrifying agent is hence evenly utilized. In the apparatus, an increase in pressure loss is inhibited. The denitrification apparatus is one in which an exhaust gas containing nitrogen oxides is introduced into an exhaust-gas passageway (1) and passed through denitrifying-agent units (11A) to (11F) and (12A) to (12F) disposed in the exhaust gas passageway (1) to remove the nitrogen oxides, and is characterized in that the denitrifying-agent units (11A) to(11F) and (12A) to (12F) are disposed in two or more stages in the flow direction for the exhaust gas and the angle between the exhaust gas inflow side of the denitrifying-agent unit (11A) disposed on the upstream side and the flow direction for the exhaust gas is regulated so as to be larger than the angle between the exhaust gas inflow side of the denitrifying-agent unit (11F) disposed on the downstream side and the flow direction for the exhaust gas.

Description

technical field [0001] The invention relates to a denitrification device for removing nitrogen oxides in closed spaces such as urban motor vehicle road tunnels or underground parking lots and denitrification equipment for tunnels. Background technique [0002] Since the air in the city's motor vehicle road tunnels or underground parking lots contains low concentrations of nitrogen oxides due to the exhaust gas emitted by motor vehicles, if it is exhausted into the atmosphere, it may cause environmental pollution to surrounding areas. Therefore, it is desirable to discharge nitrogen oxides after removal. The denitrification devices installed in tunnels and the like are relatively easy to ensure the installation space in the same direction as the extension direction of the motor vehicle tunnel (the flow direction of exhaust gas), but in the direction perpendicular to the extension direction of the tunnel The direction, that is, the height direction (hereinafter, the vertical d...

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Problems solved by technology

Therefore, it is desirable to discharge nitrogen oxides after removal. The denitrification devices installed in tunnels and the like are relatively easy to ensure the installation space in the same direction as the extension direction of the motor vehicle tunnel (the flow direction of exhaust gas), but in the direction perpendicular to the extension direction of the tunnel It is difficult to ensure the installation space in the direction of height direction (hereinafter referred to as the vertical direction perpendicular to the extension of the tunnel) or width direction (hereinafter referred to as the horizontal direction perpendicular to the extension of the tunnel).

[0003] In addition, the processing wind speed of the nitrogen oxide scavenger (hereinafter referred to as denitrification agent) used in the denitrification device is about 1-3m / s, which is 9-13m / s higher than the processing wind speed of dust collectors such as electrostatic precipitators. It is about 110~1 / 3 slower. Therefore, for the necessary ventilation air volume in road tunnels, etc., the scale of the equipment increases and more installation space is required.

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