Double-rotation SCR denitration method and apparatus thereof

Abstract

The invention discloses a double-rotation SCR denitration method and an apparatus thereof. According to the invention, a first eddy flow catalytic reaction chamber and a second eddy flow catalytic reaction chamber are arranged along a denitrating tower body; a flue gas introduction pipeline is arranged on a sidewall of the denitrating tower body; several eddy flow atomizing nozzles are respectively arranged on inner periphery of the flue gas introduction pipeline and the inner periphery at top of the first eddy flow catalytic reaction chamber; when flue gas is introduced into the flue gas introduction pipeline, the flue gas and ammonia gas injected by the eddy flow atomizing nozzle are mixed, and a mixture enables spiral sinking along circumference of the first eddy flow catalytic reaction chamber from up to down in a tangent circle mode, under effect of a cyclone, and then the mixture enable spiral rise along circumference of the second eddy flow catalytic reaction chamber from down to up in the tangent circle mode. Under prerequisite that high efficiency denitration is ensured, catalyst amount is less, operation of technical means is simple and easy, compared with the prior art, a denitrating tower structure is simple, cost of the apparatus is low, denitration efficiency is high, energy consumption is low, escapement ratio of ammonia is reduced, denitration cost is greatly reduced, and economic benefit is obviously increased.

Description

technical field [0001] The invention relates to flue gas denitrification, in particular to a double-rotation SCR denitrification method and a device thereof. Background technique [0002] NO x It is a pollutant with a relatively large impact in air pollution. It can form photochemical smog, acid rain, destroy the ozone layer, and even cause a serious greenhouse effect, which is extremely harmful to the human body, the environment and the ecosystem. Therefore, for NO x Treatment and improvement of denitrification technology are of great significance to the protection of the ecological environment and the sustainable development of our country. [0003] At present, the traditional denitrification mainly adopts selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR). Among them, the widely used SCR technology is a kind of exhaust gas control NO x An effective method of emission, the reducing agent is urea, ammonia water and pure ammonia, usually usi...

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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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