Eddy-flow atomization SCR denitration method and apparatus thereof

A swirling atomizing nozzle and denitrification technology, which is applied in the field of flue gas denitrification, can solve problems such as easy ash accumulation, ammonia escape, and catalyst failure, and achieve the effects of long contact time, uniform flow field, and increased contact specific surface area

Active Publication Date: 2016-02-03
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

It can not only realize the high-efficiency denitrification of flue gas, but also solve the proble

Method used

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  • Eddy-flow atomization SCR denitration method and apparatus thereof
  • Eddy-flow atomization SCR denitration method and apparatus thereof
  • Eddy-flow atomization SCR denitration method and apparatus thereof

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Embodiment

[0029] Such as Figures 1 to 3 shown. The invention discloses a swirl atomization SCR denitration device, which comprises a denitration tower body and a plate catalyst layer 10 arranged along the inner circumferential surface of the denitration tower body; the plate catalyst layer 10 constitutes a flue gas channel;

[0030] Along the circumferential surface of the plate catalyst layer 10, a plurality of swirl atomizing nozzles 9 are distributed in a tangential manner from bottom to top; 9 When the injected ammonia gas meets, because the ammonia gas is sprayed out in the form of a swirling flow, the smoke gas and the ammonia gas are entrained and mixed with each other, and spiral up in a tangential circle along the inner circumference of the smoke channel; The swirl atomizing nozzle 9 is connected to the ammonia supply system arranged outside the denitrification tower through pipelines.

[0031]There are two honeycomb catalysts 7 in the flue gas channel; the area between the ...

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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 ...

Claims

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Application Information

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IPC IPC(8): B01D53/90B01D53/56
Inventor 刘定平王玲袁丹珏
Owner SOUTH CHINA UNIV OF TECH
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