CN202962279U - Novel SCR (Selective Catalytic Reduction) denitration catalyst reaction device - Google Patents
Novel SCR (Selective Catalytic Reduction) denitration catalyst reaction device Download PDFInfo
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- CN202962279U CN202962279U CN 201220690473 CN201220690473U CN202962279U CN 202962279 U CN202962279 U CN 202962279U CN 201220690473 CN201220690473 CN 201220690473 CN 201220690473 U CN201220690473 U CN 201220690473U CN 202962279 U CN202962279 U CN 202962279U
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Abstract
The utility model provides novel SCR (Selective Catalytic Reduction) denitration catalyst reaction device. The reaction device consists of a guide plate, a smoke rectifier, a plurality of catalyst layers and corresponding fireproof wear-resistant layers, wherein the guide plate is arranged at the inlet of the reaction device, the smoke rectifier is arranged behind the guide plate, the plurality of catalyst layers are arranged behind the guide plate in sequence, and one corresponding fireproof wear-resistant layer is arranged in front of each layer of the catalyst layers. Compared with the prior art, the novel SCR denitration catalyst reaction device has the advantages that the denitration catalyst distribution mode is improved by utilizing an original SCR denitration device, and the smoke rectifier and the fireproof wear-resistant layers are additionally arranged, thereby effectively preventing the sintering and wear of the catalyst; and the first fireproof wear-resistant layer can effectively prevent the sintering and the wear of the catalyst, and the fireproof wear-resistant layers of the second layer and after the second layer can effectively prevent the wear of the catalyst.
Description
Technical field
The utility model relates to a kind of denitrating catalyst reaction unit, refers to especially Novel SCR denitrating catalyst reaction unit.
Background technology
Nitrogen oxide (NO
x) be one of generally acknowledged Air Pollutants in countries in the world.NH
3SCR (Selective Catalytic Reduction, SCR) gas denitrifying technology is to remove up to now NO in flue gas
xEffective method has been widely used in the developed countries such as Europe, the United States, day at present, still belongs to the starting stage in the application of China.Catalyst is the core of SCR gas denitrifying technology, and its life-span is the key factor that affects the SCR process economy.
Under the high-temp combustion environment, the SCR catalyst is the same with other industrial catalysts, and existing active decline is the problem of inactivation.Cause the reason of the inactivation of SCR catalyst to have a lot, as fuel, equipment and operation etc.The inactivation of catalyst is the physics and chemistry process of a complexity, principal element can be summarized as following some: the 1) sintering of catalyst, the SCR catalyst gathers in certain temperature range good heat endurance, and running temperature is too high, and the phenomenon that causes sintering appears in long-term use procedure that microstructure changes and in catalyst.2) abrasion of catalyst, the abrasion of catalyst mainly cause by the flyash impact catalyst surface, and it can cause the inactivation of catalyst equally.The erosion degree of catalyst is relevant with the characteristic of air velocity, flying dust characteristic, projected angle of impact and catalyst itself.3) obstruction of catalyst, the obstruction of catalyst mainly cause due to ammonium salt and fly ash granule.4) catalyst is poisoning, and the activity and selectivity of catalyst descends due to the impact of some harmful substance or the process lost is called the poisoning of catalyst.Wherein catalyst high temperature sintering, wearing and tearing, catalyst moisture are poisoning larger on the catalyst activity and selectivity impact.
As the key of SCR flue gas denitrification system, the life-span of SCR catalyst is determining the operating cost of SCR system, and catalyst ablation, wearing and tearing, obstruction and poisoning be the main cause that causes catalysqt deactivation.For preventing that sintering of catalyst from limiting economizer exit cigarette temperature, needs as too high in the cigarette temperature carry out the heat exchange device and change, and this has just increased the cost of SCR denitration transformation; In order to reduce the abrasion of catalyst, the power plant of high ash content flue gas is adopted the catalyst material of erosion resistant, improve the edge strength of integer catalyzer, reduce abrasion with measures such as flue gas flow guiding devices, but the type catalyst costs is relatively high, also can increase SCR denitration improvement cost; Reduce the obstruction of catalyst by install soot blower additional in reactor, blow ash gas pressure because the intensity of catalyst own has limited, cause blowing ash not exclusively; Moisture in flue gas and catalyst Long Term Contact, can reduce catalyst edge intensity in addition.
Up to now, effectively prevent the inactivation that the SCR catalyst causes because of sintering, wearing and tearing etc., and the measure that descends of the intensity that causes because of moisture all increased the cost of SCR denitration transformation, very difficult acquisition is used widely.
Summary of the invention
The utility model proposes a kind of Novel SCR denitrating catalyst reaction unit, solved the higher shortcoming of cost of SCR denitration transformation in the prior art.
The technical solution of the utility model is achieved in that
Novel SCR denitrating catalyst reaction unit, it is characterized in that, this reaction unit comprises deflector, flue gas rectifier, a plurality of catalyst layer and corresponding fire prevention wear-resistant layer, described deflector is located at the reaction unit porch, described flue gas rectifier is located at the deflector rear, described a plurality of catalyst layer is located at the deflector rear successively, is equipped with the fire prevention wear-resistant layer of a correspondence before the every one deck of described a plurality of catalyst layers.
The material of described flue gas rectifier is stainless steel, and thickness is 10～20mm, and the aperture is 10～30mm.
Described a plurality of catalyst layer comprises two-layer at least, and described fire prevention wear-resistant layer is identical with the number of plies of catalyst layer.
The material of described fire prevention wear-resistant layer is alumina silicate or aluminium oxide.
The cross section of described fire prevention wear-resistant layer is honeycomb fashion, flat or corrugated plate dst.
The thickness of described fire prevention wear-resistant layer is 30～150mm.
The ground floor thickness of described fire prevention wear-resistant layer autoreaction device portal number is 50～150mm, and the thickness after the second layer or the second layer is 30～100mm.
Described reaction unit also comprises many fan access doors, before described many fan access doors are located at respectively every layer of fire prevention wear-resistant layer.
Compared with prior art, advantage of the present utility model comprises:
(1) utilize original SCR denitrification apparatus to improve the denitrating catalyst arrangement, install flue gas rectifier and fire prevention wear-resistant layer additional, reach and effectively prevent sintering of catalyst and wearing and tearing, ground floor fire prevention wear-resistant layer can effectively prevent sintering and the wearing and tearing of catalyst, and the fire prevention wear-resistant layer after the second layer and the second layer can effectively prevent the wearing and tearing of catalyst;
(2) SCR denitrating catalyst arrangement improvement expenses is low, has greatly saved investment cost and final-period management expense;
(3) the fire prevention wear-resistant layer itself just strengthens catalyst edge intensity in running, is convenient to improve blow ash gas pressure, thereby can reduces the obstruction of catalyst;
(4) install additional the fire prevention wear-resistant layer can also effectively avoid catalyst because of with flue gas in the catalyst edge intensity decline that causes of contact with moisture;
(5) the fire prevention wear-resistant layer is easy to process, and arrangement is simple, is easy to realize, is worthy to be popularized.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the utility model Novel SCR denitrating catalyst reaction unit;
Fig. 2 is the structural representation of flue gas rectifier of the present utility model;
Fig. 3 is one of structural representation of fire prevention wear-resistant layer of the present utility model;
Fig. 4 be fire prevention wear-resistant layer of the present utility model structural representation two;
Fig. 5 be fire prevention wear-resistant layer of the present utility model structural representation three.
Wherein, 1-deflector, 2-flue gas rectifier, 3-access door, 4-ground floor fire prevention wear-resistant layer, 5-ground floor catalyst layer, 6-second layer fire prevention wear-resistant layer, 7-second layer catalyst layer, 8-N (N＞2) layer fire prevention wear-resistant layer, 9-N (N＞2) layer catalyst layer
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, Novel SCR denitrating catalyst reaction unit, this reaction unit comprises deflector 1, flue gas rectifier 2, a plurality of catalyst layer (4,6,8) and corresponding fire prevention wear-resistant layer (5,7,9), described deflector 1 is located at the reaction unit porch, described flue gas rectifier 2 is located at deflector 1 rear, described a plurality of catalyst layer (4,6,8) is located at deflector 1 rear successively, is equipped with the fire prevention wear-resistant layer (5,7,9) of a correspondence before the every one deck of described a plurality of catalyst layers (4,6,8).
As shown in Figure 2, the flue gas rectifier 2 of Novel SCR denitrating catalyst reaction unit is stainless steel structure, and flue gas rectifier 2 thickness are 10-20mm, and the aperture is 10-30mm.
As shown in accompanying drawing 3～5, the fire prevention wear-resistant layer of Novel SCR denitrating catalyst reaction unit (4,6,8) material is alumina silicate or aluminium oxide, autoreaction device portal number, ground floor fire prevention wear-resistant layer 4 thickness are 50-150mm, second layer fire prevention wear-resistant layer 6 thickness are 30-100mm, N (N＞2) layer fire prevention wear-resistant layer 8 thickness are 30-100mm, fire prevention wear-resistant layer (4,6,8) interface shape is honeycomb fashion, flat or corrugated plate dst, and aperture and distance between plates are corresponding with catalyst to be consistent.
The use procedure of Novel SCR denitrating catalyst reaction unit is as follows:
After entering reaction unit from the flue gas after economizer by SCR denitration reaction device portal, first carry out water conservancy diversion through deflector 1, make smoke distribution even by 2 rectifications of flue gas rectifier afterwards, again respectively through ground floor fire prevention wear-resistant layer 4 and ground floor catalyst 5, ground floor fire prevention wear-resistant layer 4 can effectively prevent sintering and the wearing and tearing of ground floor catalyst 5, increase simultaneously the edge strength of ground floor catalyst 5, prevent that flue gas moisture is on the impact of ground floor catalyst 5 edge strengths; Flue gas enters second layer fire prevention wear-resistant layer 6 and second layer catalyst 7 afterwards, second layer fire prevention wear-resistant layer 6 can prevent the wearing and tearing of second layer catalyst 7, increase simultaneously the edge strength of second layer catalyst 7, prevent that flue gas moisture is on the impact of second layer catalyst 7 edge strengths; After enter N (N＞2) layer fire prevention wear-resistant layer 8 and N (N＞2) layer catalyst 9, flue gas is finally discharged from the outlet of SCR denitration reaction device.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. Novel SCR denitrating catalyst reaction unit, it is characterized in that, this reaction unit comprises deflector, flue gas rectifier, a plurality of catalyst layer and corresponding fire prevention wear-resistant layer, described deflector is located at the reaction unit porch, described flue gas rectifier is located at the deflector rear, described a plurality of catalyst layer is located at the deflector rear successively, is equipped with the fire prevention wear-resistant layer of a correspondence before the every one deck of described a plurality of catalyst layers.
2. Novel SCR denitrating catalyst reaction unit according to claim 1, is characterized in that, the thickness of described flue gas rectifier is 10～20mm, and the aperture is 10～30mm.
3. Novel SCR denitrating catalyst reaction unit according to claim 1, is characterized in that, described a plurality of catalyst layers comprise two-layer at least, and described fire prevention wear-resistant layer is identical with the number of plies of catalyst layer.
4. according to claim 1 or 3 described Novel SCR denitrating catalyst reaction units, is characterized in that, the cross section of described fire prevention wear-resistant layer is honeycomb fashion, flat or corrugated plate dst.
5. according to claim 1 or 3 described Novel SCR denitrating catalyst reaction units, is characterized in that, the thickness of described fire prevention wear-resistant layer is 30～150mm.
6. Novel SCR denitrating catalyst reaction unit according to claim 5, is characterized in that, the ground floor thickness of described fire prevention wear-resistant layer autoreaction device portal number is 50～150mm, and the thickness after the second layer or the second layer is 30～100mm.
7. Novel SCR denitrating catalyst reaction unit according to claim 1, is characterized in that, described reaction unit also comprises many fan access doors, before described many fan access doors are located at respectively every layer of fire prevention wear-resistant layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220690473 CN202962279U (en) | 2012-12-13 | 2012-12-13 | Novel SCR (Selective Catalytic Reduction) denitration catalyst reaction device |
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| CN 201220690473 CN202962279U (en) | 2012-12-13 | 2012-12-13 | Novel SCR (Selective Catalytic Reduction) denitration catalyst reaction device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961965A (en) * | 2012-12-13 | 2013-03-13 | 华电电力科学研究院 | Novel reaction device for SCR (selectively catalytic reduction) denitration catalyst |
| CN104492259A (en) * | 2014-12-26 | 2015-04-08 | 南通天蓝环保能源成套设备有限公司 | SCR flue gas denitrification system for household garbage furnace |
-
2012
- 2012-12-13 CN CN 201220690473 patent/CN202962279U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961965A (en) * | 2012-12-13 | 2013-03-13 | 华电电力科学研究院 | Novel reaction device for SCR (selectively catalytic reduction) denitration catalyst |
| CN104492259A (en) * | 2014-12-26 | 2015-04-08 | 南通天蓝环保能源成套设备有限公司 | SCR flue gas denitrification system for household garbage furnace |
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Granted publication date: 20130605 |
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