Method for simultaneous reduction of nitrogen oxides and nitrous oxides by a multi-step reaction in a fluidized bed furnace
A technology for nitrous oxide and nitrogen oxides, which is applied in the field of simultaneously reducing nitrogen oxides and nitrous oxides through multi-step reactions in a fluidized bed combustion furnace, so as to improve economy, reduce emissions, and reduce greenhouse gas nitrogen oxides. effect of nitrogen
Active Publication Date: 2017-01-04
KOREA INST OF ENERGY RES
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[0004] Nitrogen oxides are substances that produce acid gases and are currently included in emission control standards, but nitrous oxide has not yet applied restrictions
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[0042] In order to make the purpose, technical solutions and beneficial effects of the embodiments of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings. The scope of the present invention is not limited to the following examples. Apparently, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0043] When the fluidized bed combustion furnace burns solid fuels such as coal, waste, and sewage sludge, the temperature of the combustion furnace is maintained in the range of 750-950 ° C, which is lower than that maintained by other combustion equipment. Therefore, about 200 ppm of nitrogen oxides and 10 to 300 ppm of nitrous oxide are discharged. In order to pre...
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The invention provides a method for simultaneously reducing nitric oxide and nitrous oxide. The method is characterized by comprising the following steps: step 1, evaporating a reducing agent contained in a porous flow medium from the surface, carrying out a reaction between the reducing agent and nitric oxide and nitrous oxide, carrying out a selective non-catalytic reduction reaction, evaporating one part of the reducing agent, and moving the lightened flow medium to a position higher than the upper part of a spraying area; step 2, carrying out a selective catalytic reduction reaction between one part of nitric oxide and nitrous oxide diffusing from the air hole of the porous flow medium and the reducing agent on the surface of the air hole, wherein the reducing agent absorbed by the air hole of the flow medium is totally evaporated and removed in a mud state; and step 3, after the flow medium is light, moving the medium to the higher upper part, so that the unreacted N2O is decomposed in the air hole of the flow medium.
Description
technical field [0001] The present invention relates to a technology capable of reducing carbon dioxide generated when burning carbon sources such as coal, sewage sludge, wood, etc. in a Fluidized Bed Combustor (including an incinerator) Nitrogen oxides (NO x ) and nitrous oxide (N 2 o). In particular, it relates to a technique of using a porous fluid medium together with ammonia-based reducing agents such as anhydrous ammonia, ammonia water, and urea-water solution in a fluidized bed combustion furnace. Background technique [0002] Nitrogen oxides in the atmosphere are nitrous oxide (N 2 O: nitrous oxide), nitric oxide (NO: nitric oxide), dinitrogen trioxide (N 2 o 3 : nitrogen trioxide), nitrogen dioxide (NO 2 : nitrogen dioxide), dinitrogen pentoxide (N 2 o 5 : nitrogen peroxi de), and nitrogen trioxide (NO 3 ). Among them, N 2 O, NO, NO 2 . They are known as nitrogen oxides in the field of air pollution. [0003] Compared with other combustion furnaces, th...
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IPC IPC(8): B01D53/80B01D53/56
CPCY02C20/10
Inventor 文胜铉李承宰柳寅洙
Owner KOREA INST OF ENERGY RES