HARMFUL GAS DIFFUSION PREVENTION DEVICE FOR URBAN SEWER

摘要

The present invention is a case; an intake unit installed in the upper portion of the case to suck outside air; a suction pipe through which outside air is delivered before treatment to the intake unit; a photochemical oxidation treatment unit installed in the lower portion of the case and configured to purify external air delivered by the intake unit; and a discharge pipe through which external air is transported after treatment from the photochemical oxidation treatment unit, wherein the photochemical oxidation treatment unit includes a plurality of treatment modules vertically arranged and connected in series, inside and outside the photochemical oxidation treatment unit Disclosed is a device for preventing the spread of harmful gas for an urban sewage pipe, characterized in that the air flow is a downflow type from the top to the bottom. According to such a harmful gas diffusion prevention device, it has an intake function and a photochemical oxidation function, maximizes the efficiency of each function, is easy to construct and maintains, and is a photochemical oxidation reaction dispersion for the emitted harmful gas. It is possible to minimize the performance degradation and secondary pollution caused by the device, and it can be advantageously applied especially to the urban sewage pipe.