Eddy-flow atomization SCR denitration method and apparatus thereof

Abstract

The invention discloses an eddy-flow atomization SCR denitration method and an apparatus thereof. The apparatus are characterized in that a plate-type catalyst layer is arranged along the periphery of the denitrating tower body, and a flue gas channel is formed. A cellular catalyst is arranged in the flue gas channel, and a two-stage catalytic reaction zone is formed with the plate-type catalyst. Several eddy flow atomizing nozzles capable of injecting the catalyst along tangent circle direction and distributed from down to up are arranged along the periphery of the plate-type catalyst layer. When flue gas is introduced into the flue gas channel and meets with ammonia gas injected in an eddy flow mode along the tangent circle direction, the flue gas enables spiral rising in the tangent circle mode along the inner circumference of the flue gas channel. The method and the apparatus can solve the problems of poor mixing condition of the flue gas and NH3 as well as uneven flow field, increase a contact specific surface area and time of the flue gas with a reducing agent and the catalyst, effectively use a denitrating tower space, increase reaction efficiency, reduce flue gas resistance, have low energy consumption, reduce the ammonia escape rate, greatly reduce denitration cost, and obviously increase the economic benefit.

Description

technical field [0001] The invention relates to flue gas denitrification, in particular to a cyclone atomization SCR denitrification method and a device thereof. Background technique [0002] NO x It is the main source of air pollutants, and its massive discharge will cause great harm to the environment. In order to protect the environment, NO x Govern. Selective catalytic reduction (SCR), which is widely used in the world, is a method of controlling NO from exhaust gas. x effective method of emission. [0003] The current SCR method is to use NH 3 As a reducing agent, under the action of catalyst, NO x revert to harmless N 2 , so as to remove NO from the flue gas x . Selecting a suitable catalyst is the core of SCR technology, and the catalyst structure generally has three types: honeycomb type, flat plate type and corrugated plate type. Among them, the honeycomb catalyst has a large geometric specific surface area, but its dustproof and anti-clogging performance ...

AI Technical Summary

Problems solved by technology

It can not only realize the high-efficiency denitrification of flue gas, but also solve the problems of easy ash accumulation, catalyst failure and ammonia escape that often occur in the prior art

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