Environmental-protection comprehensive treatment system and environmental-protection comprehensive treatment process for high-pollution-factor low-temperature flue gas

Abstract

The invention discloses an environmental-protection comprehensive treatment system for high-pollution-factor low-temperature flue gas. The environmental-protection comprehensive treatment system comprises a full-automatic desulfurizer delivery device, a desulfurization tower and a medium-and-low-temperature SCR (selective catalytic reduction) reactor. The full-automatic desulfurizer delivery device is connected with a gas inlet of the desulfurization tower through a flue gas pipeline. A water pump is connected with one end of a water tank. The other end of the water tank is connected with the desulfurization tower through a double-fluid spray gun. The double-fluid spray gun is connected with an air compressor. A gas outlet of the desulfurization tower is connected with a bag-type dedusting unit through a flue gas pipeline. A dilution fan is connected with an ammonia-air mixer through a pipeline. An ammonia inlet is arranged on the pipeline between the dilution fan and the ammonia-air mixer. The ammonia-air mixer and the bag-type dedusting unit are connected with the medium-and-low-temperature SCR reactor after passing an ammonia spraying grille. An outlet of the medium-and-low-temperature SCR reactor passes a draught fan to be connected with a chimney. The environmental-protection comprehensive treatment system has the advantages that flue gas heat and temperature gradient are utilized reasonably, high-temperature dedusting processes are reduced, stable efficient operation of a denitration system and service life of catalysts can be guaranteed, and flue gas treatment effect can be improved.

Description

technical field [0001] The invention relates to an environment-friendly comprehensive treatment system and technology for low-temperature flue gas with high pollution factors. Background technique [0002] With the development of my country's industry, the amount of industrial waste gas emissions has increased sharply, and the impact on the environment has become greater and greater. Environmental protection requirements have received more and more attention, and the state has stricter regulations on the emission of air pollutants. [0003] For glass and other emissions containing high pollution factors (high NO X concentration, high SO 2 , high dust) waste gas industry, in order to reduce the equipment footprint and simplify the process, desulfurization, denitrification and dust removal are integrated to treat waste gas, which can be roughly divided into two routes, first denitrification and then desulfurization and dust removal, or first desulfurization and dust removal a...

AI Technical Summary

Problems solved by technology

The traditional dry method has low desulfurization efficiency and cannot meet the new requirements of environmental protection; the wet method has a high desulfurization rate and high absorbent utilization rate, but the treatment system is complex and easily causes secondary pollution; the semi-dry method reaction product is dry In powder form, it will alleviate problems such as corrosion and condensation in the subsequent process, and its desulfurization rate is between the dry method and the wet method

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