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Nitrogen oxide emission control method and device

A nitrogen oxide and emission control technology, applied in the metallurgical field, can solve the problems of high cost, high cost of desulfurization and denitrification, no NOx control, etc., and achieve the effects of low cost, lower content, and inhibition of nitrogen oxides.

Active Publication Date: 2018-07-10
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of realizing the present invention, the inventor found that in the prior art, NOx can be treated through the desulfurization and denitrification device at the end of the sintering system, but the cost of desulfurization and denitrification is quite expensive and the cost is very high
There is not yet an effective method to control NOx emissions in the prior art

Method used

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  • Nitrogen oxide emission control method and device
  • Nitrogen oxide emission control method and device
  • Nitrogen oxide emission control method and device

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Embodiment Construction

[0064] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with some aspects of the invention as recited in the appended claims.

[0065] figure 1 is a schematic diagram of a sintering trolley according to an exemplary embodiment of the present invention, in figure 1 In the middle, the mixed material trough distributes the material to be sintered on the sintering trolley through the round roller and the nine-stick distributor. The material moves from left to right in the picture and burns under the Multiple side-by-side bellows...

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Abstract

The embodiment of the invention provides a nitrogen oxide emission control method and device. The method comprises the steps of obtaining the current nitrogen oxide emission state; obtaining the current alkalinity state of a material; and according to the current nitrogen oxide emission state, the current alkalinity state of the material and a preset strategy, adjusting the matching ratio of CaO and the matching ratio of CaCO3 in the material. According to the nitrogen oxide emission control method and device, the matching ratio of the CaO and the matching ratio of the CaCO3 in the material are adjusted according to the current nitrogen oxide emission state, the current alkalinity state of the material and the preset strategy, so that on the basis that the alkalinity of sintered ore is guaranteed, the content of the CaCO3 is reduced by changing the component ratio of solvent, and in other words, the content of the CaO is properly increased; generation of nitrogen oxide can be inhibited; the cost is low, and in addition, chemical properties of the sintered ore are not affected; and quality of the sintered ore is guaranteed.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a nitrogen oxide emission control method and device. Background technique [0002] With the rapid development of modern industry, the scale of iron and steel production is getting larger and larger, and the energy consumption is also increasing. Energy conservation and environmental protection have become an important indicator in iron and steel production. In steel production, iron-bearing raw material ore needs to be sintered before being smelted in a blast furnace. In the sintering process, various powdered iron-containing raw materials are mixed with appropriate amount of fuel and flux, and an appropriate amount of water is added. After mixing and pelletizing, a mixed material is formed, and then the mixed material is passed through a feeder and a distributor. It is evenly distributed on the sintering trolley, and calcined at high temperature after ignition, so that the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D19/00
CPCF27D19/00F27D2019/0012
Inventor 李宗平孙英曾辉谌玉婷
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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