CN103816799B - Improve denitrfying agent of SNCR denitration efficiency and preparation method thereof - Google Patents
Improve denitrfying agent of SNCR denitration efficiency and preparation method thereof Download PDFInfo
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- CN103816799B CN103816799B CN201410101674.0A CN201410101674A CN103816799B CN 103816799 B CN103816799 B CN 103816799B CN 201410101674 A CN201410101674 A CN 201410101674A CN 103816799 B CN103816799 B CN 103816799B
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Abstract
The invention belongs to the improvement field of flue gas nitrogen oxide, be specifically related to a kind of denitrfying agent improving SNCR denitration efficiency.Be made up of the raw material of following parts by weight: calcium acetate magnesium salt 20-30 part, iron oxide 10-20 part, titanium oxide 5-10 part, manganese dioxide 1-5 part, cerium oxide 0.1-1 part, water 40-65 part and hydroxypropyl methylcellulose 5-15 part.The present invention utilizes the catalytic of nanoscale catalyst and the precipitation of calcium acetate magnesium salt, be added on the denitration efficiency that can improve SNCR denitration system in reducing agent further, make the denitration efficiency of SNCR denitration system reach more than 85%, greatly reduce owner and the initial stage that denitrating flue gas is administered is dropped into and operating cost; The present invention also provides its preparation method, rational technology, and cost is low, is easy to suitability for industrialized production.
Description
Technical field
The invention belongs to the improvement field of flue gas nitrogen oxide, be specifically related to a kind ofly improve denitrfying agent of SNCR denitration efficiency and preparation method thereof.
Background technology
Air is the most basic vital principle that the mankind depend on for existence, and due to increasing rapidly of economy, the coal-fired produced pollution is more and more serious, the SO produced in coal-fired flue-gas
2and NO
xbeing main atmosphere pollution, is the main cause place of causing acid rain, simultaneously NO
xalso be a kind of material causing the environmental problem such as depletion of the ozone layer and photochemical fog, these have become the key factor of restriction social development; Each state to be all devoted to the research of denitration technology always, in the denitration technology of domestic and international research, mainly contain selective catalytic reduction (being called for short SCR), SNCR method (being called for short SNCR), wet oxidation method, wet reducing method etc., wherein SCR and SNCR system is industrially widely used, and wet oxidation method, wet reducing method are in laboratory conditions.
NO in flue gas
xwith NO and NO
2be main, NO accounts for 90-95%, and SNCR denitration technology is based on reductive NO.
SNCR denitration technology adopts reducing agent to spray in boiler furnace to carry out selective reaction with NO, without catalyst, adds reducing agent in high-temperature region.Reducing agent sprays into the region that chamber temperature is 850 DEG C-1100 DEG C, and this reducing agent (urea) rapid thermal decomposition becomes NH
3and carry out SNCR with the NO in flue gas and react and generate N
2, this technique relative to the feature of SCR denitration technology is: initial investment expense and operating cost low, only have 1/5th of SCR, but its denitration efficiency is low, the denitration efficiency of SNCR only has 40-60%, and the denitration efficiency of SCR reaches more than 80%.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of denitrfying agent improving SNCR denitration efficiency, the denitration efficiency of SNCR denitration system can be improved, make the denitration efficiency of SNCR denitration system reach more than 85%, greatly reduce owner and the initial stage that denitrating flue gas is administered is dropped into and operating cost; The present invention also provides its preparation method, rational technology, and cost is low, is easy to suitability for industrialized production.
The denitrfying agent of raising SNCR denitration efficiency of the present invention, be made up of the raw material of following parts by weight:
Calcium acetate magnesium salt 20-30 part,
Iron oxide 10-20 part,
Titanium oxide 5-10 part,
Manganese dioxide 1-5 part,
Cerium oxide 0.1-1 part,
Water 40-65 part,
Hydroxypropyl methylcellulose 5-15 part.
Wherein: iron oxide, titanium oxide, manganese dioxide and cerium oxide all adopt Nano grade material, be preferably: iron oxide particle diameter is 30-70nm, and titanium oxide particle diameter is 30-70nm, and manganese dioxide particle diameter is 30-70nm, and cerium oxide particle diameter is 30-70nm.
Cerium oxide is transition metal oxide, after mixing nanometer ferro oxide, titanium oxide and manganese dioxide, can provide new active sites on the one hand, the mutual synergy between Mn and Fe can be made on the other hand to optimize, improve denitration activity further.
Calcium acetate magnesium salt in calcination process, can separate out CH under hot conditions in stove
4/ H
2, can there is reduction reaction with NO in the reducing gas such as/CO, reach the object removing NO.
The preparation method of the denitrfying agent of raising SNCR denitration efficiency of the present invention, comprises the following steps:
(1) by iron oxide, titanium oxide, manganese dioxide, cerium oxide mixing, nanoscale catalyst is obtained;
(2) add hydroxypropyl methylcellulose after nanometer grade powder oxidation catalyst, calcium acetate magnesium salt and water being uniformly mixed, obtain product.
Nanoscale catalyst in the present invention, be made up of iron oxide, manganese dioxide, titanium oxide, cerium oxide hybrid process, active component is mainly iron oxide and manganese dioxide, be compounded on titanium oxide, because manganese dioxide has reasonable catalytic oxidative, after mixing Fe, Mn and Fe there occurs mutual synergy, define new highly active nanoscale catalyst, cerium oxide is transition metal oxide, after mixing nanoscale catalyst, new active sites can be provided on the one hand, impel denitration efficiency to improve further.Wherein the mol ratio of Mn/Fe is preferably 0.8-1.8, and active component is mainly iron oxide, manganese dioxide, cerium oxide, and the gross mass mark of active component is preferably 18%-28%.
In sum, the present invention has the following advantages:
(1) the present invention utilizes the catalytic of nanoscale catalyst and the precipitation of calcium acetate magnesium salt, be added in reducing agent (urea) at the denitration efficiency that can improve SNCR denitration system further, the denitration efficiency of SNCR denitration system is made to reach more than 85%, be equal to the denitration effect of SCR, greatly reduce owner and the initial stage that denitrating flue gas is administered is dropped into and operating cost.
(2) preparation method provided by the invention, rational technology, cost is low, is easy to suitability for industrialized production.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
Improve a denitrfying agent for SNCR denitration efficiency, be made up of the raw material of following parts by weight: calcium acetate magnesium salt 25 parts, iron oxide 15 parts, titanium oxide 6 parts, manganese dioxide 3 parts, cerium oxide 0.5 part, 50 parts, water, hydroxypropyl methylcellulose 10 parts.
Preparation method is: (1), by iron oxide, titanium oxide, manganese dioxide, cerium oxide mixing, obtains nanoscale catalyst; (2) add hydroxypropyl methylcellulose after nanometer grade powder oxidation catalyst, calcium acetate magnesium salt and water being uniformly mixed, obtain the denitrfying agent of liquid state.
Performance test is carried out to the denitrfying agent that embodiment 1 prepares:
Denitrfying agent carry out laboratory experiment prepared by independent application specific embodiment 1, simulated flue gas forms 0.1% nitric oxide, 5% oxygen, air speed 2000h
-1, carry out detection to flue gas and show, reaction temperature is when 800-900 DEG C, and the removal efficiency of nitrogen oxide reaches 40%.
Adopt SNCR simulated experiment, when not adding special denitration medicament, the denitration efficiency of SNCR is 60%, and after adding special denitration medicament, the denitration efficiency of SNCR reaches 90%.
Embodiment 2
Improve a denitrfying agent for SNCR denitration efficiency, be made up of the raw material of following parts by weight: calcium acetate magnesium salt 20 parts, iron oxide 20 parts, titanium oxide 5 parts, manganese dioxide 5 parts, cerium oxide 0.1 part, 40 parts, water, hydroxypropyl methylcellulose 15 parts.
Preparation method is: (1), by iron oxide, titanium oxide, manganese dioxide, cerium oxide mixing, obtains nanoscale catalyst; (2) add hydroxypropyl methylcellulose after nanometer grade powder oxidation catalyst, calcium acetate magnesium salt and water being uniformly mixed, obtain product.
Performance test is carried out to the denitrfying agent that embodiment 2 prepares:
Denitrfying agent carry out laboratory experiment prepared by independent application specific embodiment 2, simulated flue gas forms 0.1% nitric oxide, 5% oxygen, air speed 2000h
-1, carry out detection to flue gas and show, reaction temperature is when 800-900 DEG C, and the removal efficiency of nitrogen oxide reaches 35%.
Adopt SNCR simulated experiment, when not adding special denitration medicament, the denitration efficiency of SNCR is 60%, and after adding special denitration medicament, the denitration efficiency of SNCR reaches 88%.
Embodiment 3
Improve a denitrfying agent for SNCR denitration efficiency, be made up of the raw material of following parts by weight: calcium acetate magnesium salt 30 parts, iron oxide 10 parts, titanium oxide 10 parts, manganese dioxide 1 part, cerium oxide 1 part, 65 parts, water, hydroxypropyl methylcellulose 5 parts.
Preparation method is: (1), by iron oxide, titanium oxide, manganese dioxide mixing, obtains nanoscale catalyst; (2) add hydroxypropyl methylcellulose after nanometer grade powder oxidation catalyst, organic calcium and ethanol being uniformly mixed, obtain product.
Performance test is carried out to the denitrfying agent that embodiment 3 prepares:
Denitrfying agent carry out laboratory experiment prepared by independent application specific embodiment 3, simulated flue gas forms 0.1% nitric oxide, 5% oxygen, air speed 2000h
-1, carry out detection to flue gas and show, reaction temperature is when 800-900 DEG C, and the removal efficiency of nitrogen oxide reaches 34%.
Adopt SNCR simulated experiment, when not adding special denitration medicament, the denitration efficiency of SNCR is 60%, and after adding special denitration medicament, the denitration efficiency of SNCR reaches 85%.
Claims (1)
1. one kind is improved the denitrfying agent of SNCR denitration efficiency, it is characterized in that: be made up of the raw material of following parts by weight: calcium acetate magnesium salt 25 parts, iron oxide 15 parts, titanium oxide 6 parts, manganese dioxide 3 parts, cerium oxide 0.5 part, 50 parts, water, hydroxypropyl methylcellulose 10 parts, wherein: iron oxide particle diameter is 30-70nm, titanium oxide particle diameter is 30-70nm, and manganese dioxide particle diameter is 30-70nm, and cerium oxide particle diameter is 30-70nm;
Preparation method is: (1), by iron oxide, titanium oxide, manganese dioxide, cerium oxide mixing, obtains nanoscale catalyst; (2) add hydroxypropyl methylcellulose after nanoscale catalyst, calcium acetate magnesium salt and water being uniformly mixed, obtain the denitrfying agent of liquid state.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104645794A (en) * | 2015-01-13 | 2015-05-27 | 广州特种承压设备检测研究院 | Method for optimizing SNCR (selective non-catalytic reduction) denitrification system of garbage incinerator by adding anionic surfactant |
| CN105056758B (en) * | 2015-07-31 | 2017-07-04 | 湘潭大学 | A kind of fluid catalytic removes the method and device of nitrogen oxides |
| CN105903329B (en) * | 2016-06-14 | 2018-06-29 | 广东万引科技发展有限公司 | A kind of flue gas desulfurization and denitration technique |
| CN107998852A (en) * | 2018-01-24 | 2018-05-08 | 东莞市升佳净水材料有限公司 | A kind of solid denitrfying agent and preparation method thereof |
| CN110711465A (en) * | 2018-07-11 | 2020-01-21 | 陕西捷强科贸有限公司 | High-temperature denitration agent and method for denitration treatment of flue gas by using same |
| CN109806913B (en) * | 2019-03-12 | 2022-05-31 | 南京信融环保新材料有限公司 | Denitration catalyst applied to cement plant and preparation method thereof |
| CN111167277A (en) * | 2020-01-19 | 2020-05-19 | 山东省昔利环境科技有限公司 | Preparation method of composite organic calcium-based denitration agent |
| CN111672290A (en) * | 2020-06-08 | 2020-09-18 | 宜兴市禄洪环保科技有限公司 | Solid-state denitration agent and preparation method thereof |
| CN112403529A (en) * | 2020-10-29 | 2021-02-26 | 宜兴市禄洪环保科技有限公司 | Solid desulfurization and denitrification agent |
| CN113967407A (en) * | 2021-10-18 | 2022-01-25 | 中国人民大学 | SNCR (selective non-catalytic reduction) high-efficiency auxiliary agent as well as preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078517A (en) * | 2007-06-08 | 2007-11-28 | 华北电力大学 | Method for simultaneously removing SO2, NOx from coal-fired furnace |
| CN103055848A (en) * | 2012-12-25 | 2013-04-24 | 浙江海亮环境材料有限公司 | Rare-earth doped low-temperature denitration catalyst and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078517A (en) * | 2007-06-08 | 2007-11-28 | 华北电力大学 | Method for simultaneously removing SO2, NOx from coal-fired furnace |
| CN103055848A (en) * | 2012-12-25 | 2013-04-24 | 浙江海亮环境材料有限公司 | Rare-earth doped low-temperature denitration catalyst and preparation method thereof |
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