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Composite denitration agent and preparation method thereof

A technology of denitrification and medicament, which is applied in the field of compound denitrification medicament and its preparation, which can solve the problems of energy waste, difficulty in denitrification, and reduction of boiler thermal efficiency, and achieve the effects of improving efficiency, reducing corrosion, and improving denitrification efficiency

Inactive Publication Date: 2019-04-16
山东旭柏节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The compound denitration agent of the present invention greatly improves the denitrification efficiency, and solves the problem that the traditional process cannot meet the national ultra-low emission standard due to the low denitrification efficiency;
[0006] (2) The composite denitrification agent of the present invention solves the problem of difficult denitrification when the temperature is relatively low;
[0007] (3) The composite denitrification agent of the present invention solves the problem that boiler coking cannot operate normally due to dry denitrification in the past;
[0008] (4) The composite denitrification agent of the present invention solves the problem of energy waste caused by the reduction of boiler thermal efficiency caused by wet denitrification in the past;

Method used

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  • Composite denitration agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: A compound denitration agent and its preparation method

[0030] A (dry method) compound denitrification agent includes the following raw material components, 68 parts of urea, 32 parts of coal; through grinding, the coal is ground into 10-200 mesh (or 10-80 mesh) particles and dried, and urea is added to raise to The silo of the mixer is fully stirred evenly to obtain (dry amino compound) compound denitrification agent.

[0031] The urea has a nitrogen content greater than 46%;

[0032] The coal is selected from coal with high combustion value, high volatile content and high tar content.

Embodiment 2

[0033] Example 2: A compound denitration agent and its preparation method

[0034] A (dry method) compound denitration agent includes the following raw material components, 70 parts of urea, 30 parts of coal; through grinding, the coal is ground into 10-200 mesh (or 10-100 mesh) particles and dried, and urea is added to raise to The silo of the mixer is fully stirred evenly to obtain (dry amino compound) compound denitrification agent.

[0035] The urea has a nitrogen content greater than 46%;

[0036] The coal is selected from coal with high combustion value, high volatile content and high tar content.

Embodiment 3

[0037] Example 3: A compound denitration agent and its preparation method

[0038] A (dry method) compound denitration agent includes the following raw material components, 72 parts of urea, 28 parts of coal; through grinding, the coal is ground into 10-200 mesh (or 10-120 mesh) particles and dried, and urea is added to raise to The silo of the mixer is fully stirred evenly to obtain (dry amino compound) compound denitrification agent.

[0039] The urea has a nitrogen content greater than 46%;

[0040] The coal is selected from coal with high combustion value, high volatile content and high tar content.

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Abstract

The invention provides a composite denitration agent. The composite denitration agent is characterized in that the viable temperature range is 550-1200 DEG C, the NOX content after denitration is lessthan 50 mg / m<3>, the energy is saved by 4%, and the denitration rate can reach 76.6-91.6%; the composite denitration agent is prepared from 68-80 parts of urea and 20-32 parts of coal. The inventionalso provides a preparation method of the composite denitration agent. The method comprises the steps that the coal is grinded into 10-200-mesh fine powder and dried; the urea is added into a container, then the grinded coal powder is added, and uniform mixing is carried out. The composite denitration agent greatly improves the denitration efficiency, solves the problem that a traditional processcannot meet the national ultra-low emission standard due to the low denitration efficiency, solves the problem that the denitration is difficult when the temperature is relatively low, and solves theproblem that a boiler cannot run normally due to coking of the boiler caused by dry denitration in the past.

Description

technical field [0001] The invention relates to the field of denitrification and environmental protection, in particular to a composite denitrification agent and a preparation method thereof. Background technique [0002] With the strengthening of environmental protection, the inadequacies of the original compound denitrification agents are more and more obvious. At present, the commonly used method is to spray ammonia water or liquid ammonia or urea solution in the front for denitrification, and then add a denitrification catalyst for further denitrification. Spraying ammonia water (or liquid ammonia, urea solution) is not only difficult to stably meet the current national environmental protection ultra-low emission standards, resulting in production suspension and limited production, but also has obvious corrosiveness, making boiler tubes explosive and causing accidents. In addition, Because a large amount of liquid is sprayed in, the thermal efficiency will be significant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/56
CPCB01D53/56B01D53/78B01D2251/2067
Inventor 王政王骞
Owner 山东旭柏节能环保科技有限公司