A kind of double-rotation SCR denitration method and device thereof
A double-rotation, denitrification technology, applied in the field of flue gas denitrification, can solve problems such as easy ash accumulation, ammonia escape, catalyst failure, etc., and achieve the effects of long contact time, uniform flow field, and increased contact specific surface area
Active Publication Date: 2018-07-20
SOUTH CHINA UNIV OF TECH
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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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[0034] Such as Figures 1 to 4 shown. The invention discloses a double-rotation SCR denitrification device, comprising a denitrification tower body and a first plate catalyst layer 8 arranged along the inner peripheral surface of the denitrification tower body, and a second plate catalyst layer is arranged in the first plate catalyst layer 8 8-1; the cavity between the first plate catalyst layer 8 and the second plate catalyst layer 8-1 is the first swirl catalytic reaction chamber 8-2, and the cavity in the second plate catalyst layer 8-1 is the first Two swirl catalytic reaction chambers 8-3; the bottom end of the second swirl catalytic reaction chamber 8-3 is provided with a cyclone 9; the first swirl catalytic reaction chamber 8-2 and the second swirl catalytic reaction chamber 8-3 The cross section is circular.
[0035] The top of the first cyclone catalytic reaction chamber 8-2 is sealed, and a flue gas inlet pipe 11 is arranged on the upper side wall of the denitrific...
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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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IPC IPC(8): B01D53/90B01D53/56
Inventor 刘定平王玲周俊
Owner SOUTH CHINA UNIV OF TECH