CN103111287A - Fuel gas denitrification catalyst - Google Patents
Fuel gas denitrification catalyst Download PDFInfo
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- CN103111287A CN103111287A CN2013100846307A CN201310084630A CN103111287A CN 103111287 A CN103111287 A CN 103111287A CN 2013100846307 A CN2013100846307 A CN 2013100846307A CN 201310084630 A CN201310084630 A CN 201310084630A CN 103111287 A CN103111287 A CN 103111287A
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- catalyst
- fuel gas
- gas denitrification
- poisoning
- denitration
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Abstract
The invention discloses a fuel gas denitrification catalyst, and in particular discloses a catalyst for fuel gas denitrification to remove nitrogen oxide in fields of thermal power plants, coal-fired power plants, compressor-turbine units, waste incineration, steel and iron, petrifaction, internal combustion generating sets and the like. V2O5 and WO3 are added into TiO2 which is taken as a carrier to carry out calendaring molding; entrance corner strengthening of a porous structure and glass integral fiber strengthening are adopted, so as to improve low-temperature denitrification efficiency, reduce weight and bring about convenience for construction, as well as to improve anti-poisoning performance, enhance anti-heat impact ability and prolong service life of the catalyst. The installation method refers to installing in non-rainy days.
Description
Affiliated technical field:
The present invention relates to the denitrating flue gas denitrification catalyst in the fields such as steam power plant, coal-fired power plant, gas turbine group, waste incineration, iron and steel, petrochemical industry, internal combustion unit.
Background technology:
Country has put into effect the control index of strict nitrogen oxide at present, and Power Group has entered the denitration dense days.Enterprise adopts SCR technology (SCR) method to carry out denitrating flue gas, and the catalyst of selecting has two kinds, and a kind of is honeycomb fashion, and another kind is board-like.But in complicated flue gas, some pollutant easily makes catalyst poisoning lose efficacy, surface its active decline of history of dust particle covering catalyst, SO in flue gas simultaneously
2With some unreacted HN of flue gas
3Reaction generates NH
4HSO
4(NH
4)
2SO
4, cause the Corrosion blockage of equipment, make catalyst regeneration ahead of time, the increase expense.
Summary of the invention
The technical problem that solves: pollutant makes catalyst poisoning inefficacy, dust granules make catalyst activity reduction, and easily cause the Corrosion blockage of equipment.The present invention reduces cigarette and blocks up, prevents catalyst poisoning, strengthens mar proof, improves the equipment denitration efficiency, and catalyst is increased service life, reduces establishment expense.
The technical solution adopted for the present invention to solve the technical problems is: manufacturing time of the present invention short (common 2～3 days), and with TiO
2For having added V in carrier
2O
5With WO
3Calendering formation improves low-temperature denitration efficient, adopts cellular structure light weight constructability, and the raising of anti-poisoning performance, entrance corner section's reinforcement and bulk glass fibre strengthening, the thermal shock resistance of enhancing.
Poisoning: if come from the alkali metal ion (Na+, K+ etc.) of flying dust, directly contact with catalyst, be adsorbed on the locational alkali metal ion of catalyst activity and occupied the catalyst surface acidic site, and the form with DDGS is attached on catalyst, with the active material reaction in catalyst, just reduced catalyst activity, made catalyst alkali metal poisoning.As is poisoning is by the gaseous state As in flue gas
2O
3Diffuse in catalyst inner duct, and in the pore of catalyst, capillary condensation occurs, cause that catalyst activity reduces thereby perhaps react with the active sites of catalyst.The present invention adopts and controls the method that catalyst pores distributes, and the catalyst endoporus is evenly distributed, and reduces capillary condensation to control the pore distributed quantity.In addition, add MoO in catalyst
3, with MoO
3With gas phase As
2O
3It is poisoning that reaction reduces As.Has simultaneously anti-SO
2, halogen (HC, 1HF), alkali metal (Na
2O, K
2O), the performance such as heavy metal (As).
Sintering: the CaO in dust causes TiO in catalyst
2Crystalline form changes, and particle increases, surface area reduces, activity decreased; CaO and SO
3Generate CaSO
4, surface volume increases expanse, and formation bridge bonded to one another makes the catalyst surface shielding, is exposed to for a long time in the hot environment more than 450 ℃ to cause sintering of catalyst.Catalyst regeneration rate after sintering does not almost have.The present invention adds WO
3Can reduce to greatest extent the sintering of catalyst.Using in the sulphur coal situation, catalyst should select the aperture large, and hole is large, wall thickness, catalyst that sectional area is large, flue gas by the time pressure drop little, dust granule can pass through smoothly, is not easy to produce to deposit and generate CaSO
4
Corrosion-resistant: the present invention adopts ceramic fibre to do carrier, the reinforcement of entrance corner section and bulk glass fiber are to the top of catalyst edge strengthening, improve catalyst edge hardness and toughness, good mechanical stability, the resistance to erosion wearing and tearing, base material and carrier have stronger anti-mechanical wear and the performance of heat shock resistance.
Aperture design: hole count scope of the present invention: Unit 15 to 88/; Aperture: 5.2mm-20mm; The hole is high: 3mm-9mm; Thickness: 0.4mm-1mm makes it have lower resistance (saving operating cost), and suitable micropore distributes, and reaching stable denitration performance, and can effectively avoid catalyst poisoning.
Advantage and beneficial effect that compared to the prior art the present invention has are: adopt most suitable micropore volume, make denitration performance and scuff resistance reach optimal balance point; Design most suitable micropore and distribute, to reach stable denitration performance; Adopt most suitable active component, effectively suppress SO when guaranteeing the denitration rate
2/ SO
3Conversion ratio; By adding the 3rd composition, effectively suppress SO
2/ SO
3The rising of conversion ratio in running; Product Activity is even, even after the surface is worn, the activity of remainder does not have any change; Lower resistance is saved operating cost; Low temperature high activity, the NOx clearance is high; Enhanced water resistance; Anti-corrosion property at high temperature; High mechanical properties and heat resistance; Long service life is saved operating cost, has great economic benefit and social benefit.
Description of drawings
Below in conjunction with drawings and Examples, the technology of the present invention is further illustrated.
Fig. 1 is catalyst module schematic diagram of the present invention.
Fig. 2 is that catalyst edge of the present invention is strengthened schematic diagram.
＜1〉flying dust,＜2〉catalyst,＜3〉add strong hardness.
Fig. 3 is catalyst schematic cross-section of the present invention.
The specific embodiment
To consider rainy day between the catalyst module installation period, store the place and also will think about, stop carrying out installation exercise rainy day.During installation exercise, take operational method to avoid the factors such as instrument, metal fragment, electric welding spark to be damaged to catalyst, thoroughly supervision management.Handling fixture instrument (Lifting Jig) is fixed on conveying hole (Lifting Hole) above catalyst, use Lifting Jig fixing on Lifting Hole from the ground crane hanging component to inside reactor, too fast rising or fall during Lifting Jig that crane hanging component fixes, and careful and other module keeps off dress and avoids clashing into, and forbids anxious acceleration or suddenly stops with steady route as far as possible.Move toward inside reactor and utilize balance track to distribute installation, catalyst module will remain that level moves.
Claims (3)
1. a catalyst, be used for the denitrating flue gas denitrification catalyst such as steam power plant, coal-fired power plant, gas turbine group, waste incineration, iron and steel, petrochemical industry, internal combustion unit, and manufacturing time is short, with TiO
2For having added V in carrier
2O
5With WO
3Calendering formation adopts cellular structure, and entrance corner section's reinforcement and bulk glass fibre strengthening is characterized in that: improve low-temperature denitration efficient, light weight constructability, and the raising of anti-poisoning performance, the thermal shock resistance of enhancing.
2. catalyst according to claim 1 is characterized in that: hole count Unit 15 to 88/; Aperture 5.2mm-20mm; The high 3mm-9mm in hole; Thickness 0.4mm-1mm, suitable micropore distributes, and reaching stable denitration performance, and can effectively avoid catalyst poisoning, has the lower resistance characteristics, saves operating cost.
3. metallic paint according to claim 1, is characterized in that: adopt most suitable active component, effectively suppress the rising of conversion ratio in running of SO2/SO3 when guaranteeing the denitration rate; Product Activity is even, even after the surface is worn, the activity of remainder does not have any change; The NOx clearance is high; Enhanced water resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100846307A CN103111287A (en) | 2013-03-18 | 2013-03-18 | Fuel gas denitrification catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100846307A CN103111287A (en) | 2013-03-18 | 2013-03-18 | Fuel gas denitrification catalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103111287A true CN103111287A (en) | 2013-05-22 |
Family
ID=48409698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100846307A Pending CN103111287A (en) | 2013-03-18 | 2013-03-18 | Fuel gas denitrification catalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103111287A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104174442A (en) * | 2014-08-27 | 2014-12-03 | 清华大学 | Low-temperature flue gas denitration catalyst forming process |
| CN115532278A (en) * | 2022-09-23 | 2022-12-30 | 深圳能源环保股份有限公司 | Method for preparing denitration catalyst by modifying waste incineration fly ash and denitration catalyst |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102247832A (en) * | 2010-05-18 | 2011-11-23 | 上海牛翼新能源科技有限公司 | High-efficient denitration monolithic catalyst for titanium oxide carried vanadium-molybdenum composite oxide |
| CN102284283A (en) * | 2010-06-18 | 2011-12-21 | 上海牛翼新能源科技有限公司 | Flue gas denitrification titanium oxide load-type vanadium-tungsten composite oxide integral-type catalyst |
-
2013
- 2013-03-18 CN CN2013100846307A patent/CN103111287A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102247832A (en) * | 2010-05-18 | 2011-11-23 | 上海牛翼新能源科技有限公司 | High-efficient denitration monolithic catalyst for titanium oxide carried vanadium-molybdenum composite oxide |
| CN102284283A (en) * | 2010-06-18 | 2011-12-21 | 上海牛翼新能源科技有限公司 | Flue gas denitrification titanium oxide load-type vanadium-tungsten composite oxide integral-type catalyst |
Non-Patent Citations (1)
| Title |
|---|
| 朱崇兵等: "蜂窝状V2O5-WO3/TiO2催化剂脱硝性能研究", 《中国电机工程学报》, vol. 27, no. 29, 31 October 2007 (2007-10-31) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104174442A (en) * | 2014-08-27 | 2014-12-03 | 清华大学 | Low-temperature flue gas denitration catalyst forming process |
| CN104174442B (en) * | 2014-08-27 | 2016-04-13 | 清华大学 | A kind of shaping of catalyst technique of low-temperature denitration of flue gas |
| CN115532278A (en) * | 2022-09-23 | 2022-12-30 | 深圳能源环保股份有限公司 | Method for preparing denitration catalyst by modifying waste incineration fly ash and denitration catalyst |
| CN115532278B (en) * | 2022-09-23 | 2023-10-27 | 深能环保科技研发中心(深圳)有限公司 | Method for preparing denitration catalyst by modifying waste incineration fly ash and denitration catalyst |
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| DD01 | Delivery of document by public notice |
Addressee: Beijing Sino-South Asia & Pacific Environment Science Technology Co., Ltd. Document name: Notification of Passing Preliminary Examination of the Application for Invention |
|
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| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Sino-South Asia & Pacific Environment Science Technology Co., Ltd. Document name: Notification of Patent Invention Entering into Substantive Examination Stage |
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| DD01 | Delivery of document by public notice |
Addressee: Shi Honghua Document name: Notification of Passing Examination on Formalities |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130522 |