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NOx emission reduction method for cement plant

A cement plant and cement technology, applied in the field of cement, can solve problems affecting NOx emissions and achieve the effect of reducing NOx emissions and reducing environmental pollution

Inactive Publication Date: 2016-08-24
廖引家
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nitrogen in the fuel produces different amounts of NO depending on the formation of the flame recirculation zone, thus affecting the total NOx emissions

Method used

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  • NOx emission reduction method for cement plant
  • NOx emission reduction method for cement plant
  • NOx emission reduction method for cement plant

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention.

[0018] The methods for reducing NOx emissions in cement plants can be carried out individually or in combination in the following ways:

[0019] 1 Low NOx burner for kiln head

[0020] The thermal NOx in the rotary kiln is mainly produced by the burner at the kiln head, increasing the jetting speed of the primary air, increasing the momentum of the jetting of the primary air, reducing the amount of the primary air, and improving the ability to entrain the high-temperature secondary air can significantly reduce the rotary kiln. The amount of NOx produced in the kiln.

[0021] 2 Selective non-catalytic reduction technology (SNCR)

[0022] Selective non-catalytic reduction technology is a denitrification technology f...

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Abstract

The invention discloses an NOx emission reduction method for a cement plant. The operation conditions of a rotary kiln in a cement production line are controlled: the speed and jetting-out amount of primary wind are increased, the use amount of the primary wind is reduced, and the temperature of secondary wind is increased. By means of the emission reduction method for the cement plant, the emission amount of NOx of the cement plant can be reduced and made to meet the national regulations, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of cement, in particular to a method for reducing NOx emission in a cement plant. Background technique [0002] The "Emission Standards of Air Pollutants for the Cement Industry" (GB 4915-2004) stipulates that starting from January 1, 2005 for new production lines and starting from January 1, 2010 for existing production lines, nitrogen in cement kilns and kiln-mill integrated machines Oxygen compounds (as NO 2 meter) emission concentration must be less than 800mg / m³ (referring to the O in the flue gas 2 Emission concentration at 10% concentration). The NOx emission of the new dry process production line is 300-2200mg / m³ without taking NOx emission reduction measures. [0003] Nitrogen oxides NOx are NO, NO 2 and N 2 The general term for O, etc., the main components of NOx emissions from cement kilns are NO and NO 2 , of which NO accounts for about 95% of the total nitrogen oxides, NO 2 About 5%. The...

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Application Information

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IPC IPC(8): F23N3/06
CPCF23N3/06F23N2237/26
Inventor 廖引家
Owner 廖引家