Denitration agent capable of improving SNCR (Selective Non Catalytic Reduction) denitration efficiency and preparation method of denitration agent

A technology of denitrification efficiency and denitration agent, which is applied in the field of flue gas nitrogen oxide treatment, can solve the problems of low denitrification efficiency, low investment cost and operation cost, and achieve the effect of improving denitrification efficiency, low cost, and easy industrial production

Inactive Publication Date: 2014-05-28
车均
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reducing agent is sprayed into the area where the temperature of the combustion chamber is 850°C-1100°C, and the reducing agent (urea) is rapidly thermally decomposed into NH 3 SNCR reaction with NO in the flue gas to generate N 2 Compared with the SCR denitrification technology, the characteristics of this process are: the initial investment cost and operating cost are low, only one-fifth of SCR, but its denitration efficiency is low. The denitrification efficiency of SNCR is only 40-60%, while the denitrification efficiency of SCR reaches More than 80%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A denitration agent for improving the denitration efficiency of SNCR, made of the following raw materials in parts by weight: 25 parts of calcium magnesium acetate, 15 parts of iron oxide, 6 parts of titanium oxide, 3 parts of manganese dioxide, 0.5 part of cerium oxide, and 50 parts of water parts, 10 parts of hydroxypropyl methylcellulose.

[0027] The preparation method is as follows: (1) Mix iron oxide, titanium oxide, manganese dioxide, and cerium oxide to obtain a nano-scale oxidation catalyst; (2) Mix the nano-scale powder oxidation catalyst, calcium magnesium acetate and water, and then add hydroxyl Propyl methyl cellulose to obtain a liquid denitration agent.

[0028] Carry out performance test to the denitration agent prepared in embodiment 1:

[0029] The denitration agent prepared in special embodiment 1 is used alone to carry out laboratory tests, and the simulated flue gas consists of 0.1% nitric oxide, 5% oxygen, and a space velocity of 2000h -1 , the d...

Embodiment 2

[0032] A denitration agent for improving the denitration efficiency of SNCR, which is made of the following raw materials in parts by weight: 20 parts of calcium magnesium acetate, 20 parts of iron oxide, 5 parts of titanium oxide, 5 parts of manganese dioxide, 0.1 part of cerium oxide, and 40 parts of water Parts, 15 parts of hydroxypropyl methylcellulose.

[0033] The preparation method is as follows: (1) Mix iron oxide, titanium oxide, manganese dioxide, and cerium oxide to obtain a nano-scale oxidation catalyst; (2) Mix the nano-scale powder oxidation catalyst, calcium magnesium acetate and water, and then add hydroxyl Propylmethylcellulose to obtain the product.

[0034] Carry out performance test to the denitration agent that embodiment 2 prepares:

[0035] The denitration agent prepared in special embodiment 2 is used alone to carry out laboratory tests, and the simulated flue gas consists of 0.1% nitric oxide, 5% oxygen, and a space velocity of 2000h -1 , the detecti...

Embodiment 3

[0038] A denitrification agent for improving the denitrification efficiency of SNCR, made of the following raw materials in parts by weight: 30 parts of calcium magnesium acetate, 10 parts of iron oxide, 10 parts of titanium oxide, 1 part of manganese dioxide, 1 part of cerium oxide, and 65 parts of water Parts, 5 parts of hydroxypropyl methylcellulose.

[0039] The preparation method is as follows: (1) Mix iron oxide, titanium oxide, and manganese dioxide to obtain a nano-scale oxidation catalyst; (2) Stir and mix the nano-scale powder oxidation catalyst, organic calcium and ethanol, and then add hydroxypropyl methylcellulose element, get the product.

[0040] Carry out performance test to the denitration agent that embodiment 3 prepares:

[0041] The denitration agent prepared in special embodiment 3 is used alone to carry out laboratory tests, and the simulated flue gas consists of 0.1% nitric oxide, 5% oxygen, and a space velocity of 2000h -1 , the detection of flue gas ...

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Abstract

The invention belongs to the treatment field of smoke nitric oxides and in particular relates to a denitration agent capable of improving SNCR (Selective Non Catalytic Reduction) denitration efficiency. The denitration agent is prepared from the following raw materials in parts by weight: 20-30 parts of calcium magnesium acetate, 10-20 parts of ferric oxide, 5-10 parts of titanium oxide, 1-5 parts of manganese dioxide, 0.1-1 part of cerium oxide, 40-65 parts of water and 5-15 parts of hydroxypropyl methyl cellulose. By utilizing catalytic properties of nanoscale oxide catalysts and precipitation property of the calcium magnesium acetate, the denitration agent is added in a reducing agent, thus further improving the denitration efficiency of an SNCR denitration system, enabling the denitration efficiency of the SNCR denitration system to reach more than 85% and greatly reducing the initial investments and the operation cost of owners in denitration treatment of smoke; the invention also provides a preparation method of the denitration agent. The preparation method is reasonable in process, low in cost and easy to produce industrially.

Description

technical field [0001] The invention belongs to the field of treatment of flue gas nitrogen oxides, and in particular relates to a denitration agent for improving SNCR denitration efficiency and a preparation method thereof. Background technique [0002] The atmosphere is the most basic element of life for human beings to survive. Due to the rapid economic growth, the pollution caused by coal burning is becoming more and more serious. The SO produced in the flue gas of coal burning 2 and NO x It is the main air pollutant and the main cause of acid rain. At the same time, NO x It is also a substance that causes environmental problems such as ozone layer destruction and photochemical smog. These have become important factors restricting social development; all countries have been committed to the research of denitrification technology. Among the denitrification technologies studied at home and abroad, there is mainly selective catalytic reduction. (SCR for short), selective ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/56
Inventor 车均杨怀玉
Owner 车均
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