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A method and device for controlling nitrogen oxide emissions

A nitrogen oxide and emission control technology, applied in the metallurgical field, can solve the problems of uncontrolled NOx, high cost, and expensive desulfurization and denitrification.

Active Publication Date: 2019-12-27
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Description
  • Claims
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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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  • A method and device for controlling nitrogen oxide emissions
  • A method and device for controlling nitrogen oxide emissions
  • A method and device for controlling nitrogen oxide emissions

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Embodiment Construction

[0064] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0065] figure 1 is a schematic diagram of a sintering trolley shown according to an exemplary embodiment of the present invention, in figure 1 In the mixture trough, the material to be sintered is distributed on the sintering trolley through the round roller and the nine-roll distribution machine. The material is driven by the sintering trolley to move and burn from left to right in the figure....

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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 positional state of a sintering final point; and according to the current nitrogen oxide emission state, the current positional state of the sintering final point and a preset strategy, adjusting the air draft capacity of a sintering system. According to the nitrogen oxide emission control method and device, the air draft capacity of the sintering system is adjusted according to the current nitrogen oxide emission state, the current positional state of the sintering final point and the preset strategy, so that on the premise that it is guaranteed that the sintering final point is at the reasonable position, the air blast capacity is properly increased, and the sintering speed, namely the vertical sintering speed, achieved in the sintering process can be increased; thus, the thickness ofa burning belt is reduced; furthermore, the generation probability of nitrogen oxide is lowered; the cost is low, and in addition, physical properties of sintered ore are not affected; and quality ofthe sintered ore can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method and device for controlling nitrogen oxide emissions. Background technique [0002] With the rapid development of modern industry, the scale of steel production is getting larger and larger, and energy consumption is also increasing. Energy conservation and environmental protection have become important indicators in steel production. In iron and steel production, iron-containing raw material ores need to be sintered before entering the blast furnace for smelting. In the sintering process, various powdery iron-containing raw materials are first mixed with appropriate amount of fuel and flux, and an appropriate amount of water is added to form a mixed material after mixing and pelletizing, and then the mixed material is passed through a feeder and a distributing machine Disperse evenly on the sintering trolley, ignite and roast at high temperature to make the mixed mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D19/00
CPCF27D19/00F27D2019/0006F27D2019/0031
Inventor 李宗平孙英曾辉何璐瑶
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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