Engine emission test low-temperature tail gas treatment system and treatment process

Abstract

The invention discloses an engine emission test low-temperature tail gas treatment system and a treatment process. The low-temperature tail gas treatment system comprises a denitration reactor which is communicated with a low-temperature flue gas source through a smoke exhaust fan, wherein a spray gun is arranged in the denitration reactor, and an inlet of the spray gun is communicated with a sodium chlorite solution storage tank; a washer which can provide an integrated reaction space, wherein a chimney is arranged at the top of the washer; a denitration outlet flue, wherein one end of the denitration outlet flue is communicated with the outlet of the denitration reactor, the other end of the denitration outlet flue is sealed, the denitration outlet flue is communicated with the washer through a plurality of branch pipes, and the branch pipes are inserted into the washer. A denitration, desulfurization and dust removal integrated device based on sodium chlorite oxidation is more suitable for the condition of low exhaust gas temperature of an engine test. Sodium chlorite can oxidize NO and SO2, oxidized NO2 and SO3 are removed after being absorbed by an alkali liquor washer, meanwhile, the dust removal effect is achieved, and ultralow emission of sulfur dioxide, nitric oxide and dust in the tail gas is achieved.

Description

technical field [0001] The invention relates to the technical field of integration of low-temperature oxidation, desulfurization, denitrification and dust removal, in particular to a low-temperature tail gas treatment system and treatment process for engine emission tests. 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] At present, after the engine exhaust gas is filtered by the engine's built-in particulate filter (DPF) and denitrated by selective catalytic reduction (SCR), it enters the test equipment and is directly discharged. Since the current engine exhaust gas treatment measures belong to the engine's own measures, further environmental protection measures need to ...

AI Technical Summary

Problems solved by technology

If conventional SCR denitration is used, reheating is required, and the construction and operation costs are high

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