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Heterogeneous Fenton reagent and preparation method and application thereof

A heterogeneous reagent technology, applied in heterogeneous Fenton reagent and its preparation and application fields, can solve the problems of corrosion in the furnace, easy leakage of ammonia, large investment cost, etc., and achieve mild reaction conditions, easy process control, high The effect of denitration efficiency

Inactive Publication Date: 2013-04-03
上海电气电站环保工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low NOx combustion technology generally has low denitrification efficiency, and may cause corrosion, slagging in the furnace, and even reduce combustion efficiency
As for the selective catalytic reduction method and the selective non-catalytic reduction method, although the removal efficiency of the former is relatively high, its investment cost is relatively large, ammonia is easy to leak, and the catalyst cost is high, and it is easy to be poisoned; although the latter has a relatively low investment, but Its denitrification efficiency is low

Method used

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  • Heterogeneous Fenton reagent and preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0040] A heterogeneous Fenton's reagent, namely by H 2 o 2 Aqueous solution and Al 2 o 3 The pH of the Fe catalyst composition is a mixed solution of 5, and the H in the mixed solution 2 o 2 The aqueous solution concentration is 1.0mol / L, Al 2 o 3 The supported Fe catalyst concentration is 2g / L;

[0041] The Al 2 o 3 In the supported Fe catalyst, calculated by mass ratio, that is, Al 2 o 3 : Fe is 4:1.

[0042] The preparation method of above-mentioned a kind of heterogeneous phase Fenton reagent, comprises the steps:

[0043] (1), Al 2 o 3 Preparation of supported Fe catalyst

[0044] First, configure 0.05mol / L FeSO 4 1000ml of aqueous solution was added to the stirred reactor, and N 2 0.5h to exclude dissolved oxygen, then add 10g of 100-mesh activated alumina, adjust the pH value to 4.0 with a NaOH solution with a concentration of 1mol / L, and then seal to prevent oxygen from entering. Stir on a stirrer for 24 hours, then filter, wash the obtained filter cake...

Embodiment 2

[0055] A heterogeneous Fenton's reagent, namely by H 2 o 2 Aqueous solution and Al 2 o 3 The pH of the Fe catalyst composition is a mixed solution of 5, and the H in the mixed solution 2 o 2 The aqueous solution concentration is 0.5mol / L, Al 2 o 3 The supported Fe catalyst concentration is 2g / L;

[0056] The Al 2 o 3 In the supported Fe catalyst, calculated by mass ratio, that is, Al 2 o 3 : Fe is 4:1.

[0057] The above-mentioned preparation method of a heterogeneous Fenton reagent is the same as in Example 1.

[0058] Using the heterogeneous Fenton reagent obtained in Example 2 to carry out wet flue gas denitrification, the details are the same as in Application Example 1, and the denitrification efficiency is 60.95%.

Embodiment 3

[0060] A heterogeneous Fenton's reagent, namely by H 2 o 2 Aqueous solution and Al 2 o 3 The pH of the Fe catalyst composition is a mixed solution of 5, and the H in the mixed solution 2 o 2 The concentration of the aqueous solution is 1.5mol / L, Al 2 o 3 The supported Fe catalyst concentration is 2g / L;

[0061] The Al 2 o 3 In the supported Fe catalyst, calculated by mass ratio, that is, Al 2 o 3 : Fe is 4:1.

[0062] The above-mentioned preparation method of a heterogeneous Fenton reagent is the same as in Example 1.

[0063] The heterogeneous Fenton reagent obtained in Example 3 was used to carry out wet flue gas denitrification, as in Example 1, and the denitrification efficiency was 67.59%.

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Abstract

The invention discloses a heterogeneous Fenton reagent and a preparation method of the heterogeneous Fenton reagent and a method for removing NO out of smoke by wet oxidization by using the heterogeneous Fenton reagent. The heterogeneous Fenton reagent is a mixed solution which comprises an H2O2 water solution and an Al2O3 loaded Fe catalyst and has a pH of 5-6, wherein the concentration of the H2O2 waters solution in the mixed solution is 0.5-1.5mol / L, and the concentration of the Al2O3 loaded Fe catalyst is 2g / L. According to the method, NO is removed out of smoke by wet oxidization by using the heterogeneous Fenton reagent; particularly, the heterogeneous Fenton reagent is added in a conventional bubble tower, NO in the smoke is oxidized into HNO3, and thus the purpose of removing NO is reached. The method for removing NO out of the smoke by wet oxidization by using the heterogeneous Fenton reagent is low in denitration cost and does not cause secondary pollution.

Description

technical field [0001] The invention relates to a heterogeneous Fenton reagent, a preparation method thereof and the application of the heterogeneous Fenton reagent in removing NO in flue gas by wet oxidation. Background technique [0002] NOx is one of the main causes of environmental problems such as acid rain and photochemical smog. According to statistics, the NO emitted by coal combustion X About NO X More than half of the total emissions have caused great harm to humans and the ecological environment. With the increasing environmental protection requirements, new coal-fired power plants in my country have installed denitrification devices. At the same time, stricter NOx emission standards were implemented during the "Twelfth Five-Year Plan" period to control my country's increasingly serious NOx pollution. [0003] At present, there are two main types of NOx control technologies: one is removal during combustion, that is, the use of low NOx combustion technology to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/56B01J23/745
CPCY02C20/10
Inventor 潘卫国丁承刚郭瑞堂金强于月良郭士义洪杰南周曰甄文龙
Owner 上海电气电站环保工程有限公司
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