Sludge drying tail gas treatment system and process

Abstract

The invention provides a sludge drying tail gas treatment system and process. The system comprises a vertically arranged tower body; a liquid storage tank and an overflow chamber are arranged at the bottom of the tower body; an overflow plate is arranged between the liquid storage tank and the overflow chamber; a plurality of pore plates are arranged above the liquid storage tank; each pore plateis provided with an overflow pipe; the lower pipe orifice of each overflow pipe is slightly higher than the pore plate below the overflow pipe; the distance from the pore plates to the upper pipe opening of the overflow pipe is 1 / 3-1 / 2 of the distance between the two pore plates; a liquid inlet is formed in the side wall of the uppermost pore plate; the lower pipe opening of the lowermost overflowpipe is slightly higher than the bottom plate of the liquid storage tank; an aeration disc is arranged on the bottom plate of the liquid storage tank; and the inlet of the aeration disc is connectedwith a sludge drying tail gas source, the liquid storage tank is provided with a solid phase inlet, the top of the tower body is provided with a gas phase outlet, the side wall of the overflow chamberis provided with a liquid outlet, the bottom of the overflow chamber is provided with a solid phase outlet, the liquid outlet is connected with the liquid inlet through a circulating pipeline, the liquid inlet is connected with a Fenton reagent pipeline, and the solid phase inlet is connected with an activated carbon source.

Description

technical field [0001] The invention belongs to the field of sludge treatment, and relates to sludge drying tail gas treatment technology, in particular to a sludge drying tail gas treatment system and process. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the development of my country's social economy, the acceleration of urbanization and the improvement of people's living standards, the amount of urban domestic sewage has increased sharply. As an auxiliary product of sewage treatment in sewage treatment plants, sludge is rich in harmful substances such as organic humus, bacterial cells, parasite eggs and heavy metals. It is a potential secondary pollution source...

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Problems solved by technology

However, after research by the inventors, it was found that when this treatment process uses ozone to generate hydroxyl groups for oxidation treatment at the end, the addition of ozone is likely to cause secondary pollution

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