CN108187655A - A kind of SCR catalyst for denitrating flue gas, preparation method and applications system - Google Patents

A kind of SCR catalyst for denitrating flue gas, preparation method and applications system Download PDF

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Publication number
CN108187655A
CN108187655A CN201711447939.2A CN201711447939A CN108187655A CN 108187655 A CN108187655 A CN 108187655A CN 201711447939 A CN201711447939 A CN 201711447939A CN 108187655 A CN108187655 A CN 108187655A
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catalyst
scr
preparation
backbone
flue gas
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胡建锋
童长青
吴晓东
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Longyan Cercis Innovation Research Institute
Longyan University
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Longyan Cercis Innovation Research Institute
Longyan University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/24—Chromium, molybdenum or tungsten
    • B01J23/30—Tungsten
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8628—Processes characterised by a specific catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/24—Chromium, molybdenum or tungsten
    • B01J23/28—Molybdenum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/74—Iron group metals
    • B01J23/745—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/74—Iron group metals
    • B01J23/755—Nickel

Abstract

A kind of preparation method of SCR catalyst for denitrating flue gas, includes the following steps：Skeleton forming, skeleton are fired, carrier layer coats, active component load.Organic silicon sol ingredient has been used in the catalyst backbone formula of above-mentioned technical proposal catalyst, catalyst backbone is after calcining, organic silicon sol is decomposed, therefore occurs the structure that the linear or rod-shaped fiber of structure interlocks inside catalyst backbone, existing gap can allow gas molecule to pass through between fiber, and dust of the grain size more than 1 μm is retained down.Meanwhile the structure causes the specific surface area of gas channel to increase, SCR flue gases can fully be reacted with the active inorganic oxide on gas channel surface, reach good clean-up effect.Gas channel and air-flow blowback channel are also provided in catalyst, catalyst dust stratification can be effectively prevent.

Description

A kind of SCR catalyst for denitrating flue gas, preparation method and applications system
Technical field
The present invention relates to denitrating flue gas field, particularly a kind of SCR catalyst for denitrating flue gas, preparation method and applications system System.
Background technology
At present, the application of domestic gas denitrifying technology comparative maturity, the market share shared by SCR gas denitrifying technologies Therefore maximum, has a large amount of SCR catalyst for denitrating flue gas to be put into use every year.
SCR catalyst for denitrating flue gas includes honeycombed catalyst, flat catalyst and corrugated plating catalyst, these catalysis The preparation process of agent will carry out batch mixing, aging, pre-extruded, extrusion under vacuum, by it is one dry, two is dry and calcining after, formed Then several catalyst elements are assembled into a module, are finally installed to several catalyst modules by catalyst elements Catalyst bed is formed in SCR catalytic reactors.Generally speaking, the preparation of current SCR catalyst for denitrating flue gas and input make It is relatively cumbersome with process.
Other than application process is complex, SCR catalyst for denitrating flue gas is easy to occur during use stifled The problem of grey.Since the optimum temperature window of SCR denitration reaction is 300 DEG C~400 DEG C, and come out from the economizer after boiler Flue-gas temperature be placed exactly between 300 DEG C~400 DEG C, in order to save cost and effective use of energy sources, the reaction of SCR catalytic denitrations Device is all disposed within after economizer substantially.Flue gas after economizer has not gone through cleaner, wherein containing a large amount of powder The problem of dirt, this catalyst allowed in SCR catalytic denitration reactors is easy to that stifled ash occurs, once catalyst occurs to block up Ash, activity will become negatively affected.But the problem of blocking up ash for SCR catalyst for denitrating flue gas, there is no essence at present Solution.
Invention content
For this reason, it may be necessary to which providing one kind can solve the problems, such as that catalyst blocks up ash, and one kind is provided and is not easy stifled ash, purification efficiency Height is prepared, using all easily SCR catalyst for denitrating flue gas, preparation method and its application system.
To achieve the above object, a kind of preparation method of SCR catalyst for denitrating flue gas is inventor provided, including following step Suddenly：
Skeleton forming：Ceramic fibre, ca silicate fibre, organic silicon sol and water are mixed, 1~6min of stirring at normal temperature is obtained Mixed fillers are prepared as catalyst backbone by mixed fillers using die cast；
Skeleton is fired：By molding catalyst backbone in 80 DEG C~120 DEG C dry 6~12h, then 800 DEG C~1200 3~5h is calcined at DEG C；After skeleton is fired, organic silicon sol decomposes, and crisscross gas channel is formed in catalyst backbone；
Carrier layer coats：The catalyst backbone baked is impregnated in 6~12h in TiO 2 sol, then 80 DEG C~ 120 DEG C of dryings 12~for 24 hours, obtain catalyst carrier；
Active component loads：Catalyst carrier is impregnated in 6~12h in active component solution, then at 80 DEG C~120 DEG C Dry 12~for 24 hours, 3~5h is finally calcined at 400 DEG C~700 DEG C, obtains SCR catalyst for denitrating flue gas；The active component Solution manufacturing method is：The presoma of the presoma of rare earth oxide and transition metal oxide is dissolved to mixing, institute in water The molar ratio for stating rare earth oxide and transition metal oxide is 1~4:1.
In skeleton the firing step, organic silicon sol connection ceramic fibre, ca silicate fibre in former preformed catalyst skeleton, Catalyst backbone after calcining, decompose by organic silicon sol, large quantity of moisture and gas molecule volatilization, therefore catalyst bone Occurs the structure that the linear or rod-shaped fiber of structure interlocks inside frame, existing gap (gas channel) can allow gas between fiber Body molecule passes through, while dust of the grain size more than 1 μm is retained down.
In active component load step, after calcining 3~5h at last 400 DEG C~700 DEG C, it is carried on catalyst load Active component on body occurs physical-chemical reaction and forms inorganic oxide, and inorganic oxide is adhered in the form of molecule On the fiber of catalyst backbone, gas molecule NOx and the NH for spraying into system3When reducing agents are by between fiber, can be had The inorganic oxide catalysis of activity, occurs SCR denitration reaction, generates N2Deng clean gas, clean gas passes through SCR reactors Into subsequent purification device.
Further, in the skeleton forming step, ceramic fibre, ca silicate fibre, organosilicon be molten and the weight ratio of water For：40-70:30-40:5-10:5-10.
Further, be provided with air channel in the catalyst backbone, the air channel along SCR flue gases airintake direction Simultaneously parallel distribution is set；The notch of the air channel is set to the inlet end of the catalyst SCR flue gases, the SCR flue gases into Enter in air channel, and along the gas channel of air channel slot body, gas cleaning is carried out by catalyst.
Further, blow-back slot, the blow-back slot and the air channel are provided in the catalyst backbone Staggeredly oppositely arranged, the notch of the blow-back slot is set to the SCR flue gases outlet side of the catalyst；Purge gas is squeezed into Blow-back slot, and enter in air channel along the gas channel of blow-back slot slot body, the dust accumulation in air channel is cleaned.
Gas back-blowing apparatus is in the method for pulse backblowing, by purge gas (compressed air that large-scale air compressor machine provides), Dust in air channel is blown in the bottom ash bucket of SCR denitration reactor, avoids the problem of catalyst blocks up ash.
In catalyst after a period of use, catalyst can be turned to direction, reversely installed and used on the catalyst bed. SCR flue gases enter in blow-back slot, by gas channel, can be discharged from air channel, also function to air-flow and go product in air channel The effect of dirt.
Further, the longitudinal section of the catalyst backbone is rectangular, and the width of the longitudinal section is 0.8 meter~2.5 meters, The length of the longitudinal section is 2.8 meters~4.5 meters, and the length of the catalyst backbone is 1.0 meters~2.2 meters.
Further, the rare earth oxide is one or more in the oxide of cerium, praseodymium, neodymium, erbium, ytterbium.
Further, the transition metal oxide is one or more in the oxide of tungsten, molybdenum, chromium, nickel, iron.
Further, the preparation method of the TiO 2 sol includes step：By butyl titanate, absolute ethyl alcohol and water TiO 2 sol is mixed with, the mass ratio of the butyl titanate, absolute ethyl alcohol and water is 1~10：45~49：45~ 49。
Inventor additionally provides a kind of SCR catalyst for denitrating flue gas, and the denitrating catalyst is prepared by above-mentioned any one Method is made.
Inventor additionally provides a kind of SCR flue gas denitrification systems, which is characterized in that the SCR flue gas denitrification systems use Catalyst be above-mentioned SCR catalyst for denitrating flue gas.
Be different from the prior art, used in the catalyst backbone formula of above-mentioned technical proposal catalyst organic silicon sol into Point, catalyst backbone after calcining, decompose by organic silicon sol, therefore occur inside catalyst backbone structure it is linear or The structure that rod-shaped fiber interlocks, existing gap can allow gas molecule to pass through between fibre structure, and grain size is more than 1 μm Dust be retained down.Meanwhile the structure causes the specific surface area of gas channel to increase, SCR flue gases can and gas channel The active inorganic oxide on surface fully reacts, and reaches good clean-up effect.Be provided in catalyst gas channel and Air-flow blowback channel, can effectively prevent catalyst dust stratification.Meanwhile be integrated in catalyst, it can be wanted according to design Ask, a catalyst backbone or several catalyst backbones form a catalyst bed, avoid traditional SCR denitration by Unit is assembled into module, the complex process by module assembled into bed so that the utilization process of denitrating catalyst is more simple.
Description of the drawings
Fig. 1 is the front view of catalyst backbone described in specific embodiment；
Fig. 2 is the rearview of catalyst backbone described in specific embodiment；
Fig. 3 is the Longitudinal cross section schematic of catalyst backbone described in specific embodiment；
Fig. 4 is the active testing result figure of the SCR catalyst for denitrating flue gas of specific embodiment embodiment 1-3.
Reference sign：
1st, catalyst backbone,
2nd, air channel,
3rd, blow-back slot.
Specific embodiment
For the technology contents of technical solution, construction feature, the objects and the effects are described in detail, below in conjunction with specific reality It applies example and attached drawing is coordinated to be explained in detail.
Embodiment 1
It is 40 to take mass ratio:40:10:10 ceramic fibre, ca silicate fibre, organic silicon sol and water mixes, and room temperature stirs It mixes 3h and obtains mixed fillers.Using the method for moldings formed therefrom, catalyst backbone is made in mixed fillers.
Referring to Fig. 1, the front view of catalyst backbone described in specific embodiment；Catalysis described in Fig. 2 specific embodiments The rearview of agent skeleton；The Longitudinal cross section schematic of catalyst backbone described in Fig. 3 specific embodiments.In the catalyst backbone 1 6 air channels 2 are provided with, the air channel is along the airintake direction setting of SCR flue gases and parallel distribution；The slot of the air channel Mouth is set to the inlet ends of the catalyst SCR flue gases, and the SCR flue gases enter in air channel, and along the gas of air channel slot body Circulation road carries out gas cleaning by catalyst.6 blow-back slots 3 are provided in the catalyst backbone, the gas is anti- It blows slot and the air channel is staggeredly oppositely arranged, the SCR flue gases that the notch of the blow-back slot is set to the catalyst go out Gas end；Purge gas (large-scale air compressor machine provide compressed air) is squeezed into blow-back slot by back-blowing device, and along blow-back The gas channel of slot slot body enters in air channel, and the dust accumulation in air channel is cleaned.
Catalyst backbone is bulk, and longitudinal section is rectangular, and the width in section is 2 meters, and length is 3 meters, catalyst backbone Length is 2 meters.12h is dried after skeleton forming at 100 DEG C, 3h is then calcined at 800 DEG C can obtain catalyst backbone.Bone After frame is fired, organic silicon sol decomposes, and crisscross gas channel is formed in catalyst backbone.
It is 2 to take mass ratio：9：9 butyl titanate, absolute ethyl alcohol and water mixing, stirring at normal temperature obtain titanium dioxide in 60 minutes Titanium colloidal sol rests on the catalyst backbone prepared in TiO 2 sol, impregnates 6h, by catalyst backbone after having impregnated It is taken out from TiO 2 sol, colloidal sol remaining in duct is purged totally, be then placed in drying equipment at 80 DEG C dry 12h obtains catalyst carrier.
According to CeO2And WO3Molar ratio be 4:1 ratio, takes CeO2Presoma cerous nitrate and WO3The inclined tungsten of presoma Mixed solution is made in sour ammonium dissolving together, and the catalyst backbone for having been coated with carrier is put into mixed solution, impregnates 6h, Catalyst backbone from mixed solution is taken out after having impregnated, solution remaining in duct is purged totally, is then placed in dry Dry 12h at 80 DEG C, then puts it into and calcines 3h in Muffle furnace at 500 DEG C, obtain SCR flue gas denitration catalysts in dry equipment Agent.
Embodiment 2
It is 60 to take mass ratio:30:5:5 ceramic fibre, ca silicate fibre, organic silicon sol and water mixing, stirring at normal temperature 5h obtains mixing pug.Using the method for moldings formed therefrom, catalyst backbone is made in mixing pug, is set in the catalyst backbone Air channel is equipped with, the air channel is along the airintake direction setting of SCR flue gases and parallel distribution；The notch setting of the air channel In the inlet end of the catalyst SCR flue gases, the SCR flue gases enter in air channel, and along the gas channel of air channel slot body, Gas cleaning is carried out by catalyst.Be provided with blow-back slot in the catalyst backbone, the blow-back slot with it is described Air channel is staggeredly oppositely arranged, and the notch of the blow-back slot is set to the SCR flue gases outlet side of the catalyst；Blowback fills It puts and purge gas (large-scale air compressor machine provide compressed air) is squeezed into blow-back slot, and along the air-flow of blow-back slot slot body Channel enters in air channel, and the dust accumulation in air channel is cleaned.
Catalyst backbone is bulk, and longitudinal section is rectangular, and the width in section is 1.5 meters, and length is 3.5 meters, catalyst bone The length of frame is 1.2 meters.10h is dried after skeleton forming at 110 DEG C, 4h is then calcined at 900 DEG C can obtain catalyst Skeleton.After skeleton is fired, organic silicon sol decomposes, and crisscross gas channel is formed in catalyst backbone.
It is 8 to take mass ratio：46：46 butyl titanate, absolute ethyl alcohol and water mixing, stirring at normal temperature obtain dioxy in 50 minutes Change titanium colloidal sol, the catalyst backbone prepared is rested in TiO 2 sol, impregnate 8h, by catalyst bone after having impregnated Frame takes out from TiO 2 sol, and colloidal sol remaining in duct is purged totally, is then placed in drying equipment at 110 DEG C and does Dry 10h, obtains catalyst carrier.
According to PrO2And MoO3Molar ratio be 3:1 ratio, takes PrO2Presoma praseodymium nitrate and MoO3Presoma seven Mixed solution is made in ammonium molybdate dissolving together, and the catalyst backbone for having been coated with carrier is put into mixed solution, impregnates 8h takes out catalyst backbone after having impregnated from mixed solution, and solution remaining in duct is purged totally, is then placed in Dry 10h at 110 DEG C, then puts it into and calcines 4h in Muffle furnace at 600 DEG C, obtain SCR denitrating flue gas in drying equipment Catalyst.
Embodiment 3
It is 50 to take mass ratio：40：5：5 ceramic fibre, ca silicate fibre, organic silicon sol and water mixing, stirring at normal temperature 6h obtains mixing pug.Using the method for moldings formed therefrom, catalyst backbone is made in mixing pug, is set in the catalyst backbone Air channel is equipped with, the air channel is along the airintake direction setting of SCR flue gases and parallel distribution；The notch setting of the air channel In the inlet end of the catalyst SCR flue gases, the SCR flue gases enter in air channel, and along the gas channel of air channel slot body, Gas cleaning is carried out by catalyst.Be provided with blow-back slot in the catalyst backbone, the blow-back slot with it is described Air channel is staggeredly oppositely arranged, and the notch of the blow-back slot is set to the SCR flue gases outlet side of the catalyst；Blowback fills It puts and purge gas (large-scale air compressor machine provide compressed air) is squeezed into blow-back slot, and along the air-flow of blow-back slot slot body Channel enters in air channel, and the dust accumulation in air channel is cleaned.
Catalyst backbone is bulk, and longitudinal section is rectangular, and the width in section is 2.5 meters, and length is 4.5 meters, catalyst bone The length of frame is 1.5 meters.8h is dried after skeleton forming at 120 DEG C, 5h is then calcined at 1000 DEG C can obtain catalyst Skeleton.After skeleton is fired, organic silicon sol decomposes, and crisscross gas channel is formed in catalyst backbone.
It is 2 to take mass ratio：49：49 butyl titanate, absolute ethyl alcohol and water mixing, stirring at normal temperature obtain dioxy in 40 minutes Change titanium colloidal sol, the catalyst backbone prepared is rested in TiO 2 sol, impregnate 10h, by catalyst after having impregnated Skeleton takes out from TiO 2 sol, and colloidal sol remaining in duct is purged totally, is then placed in drying equipment at 120 DEG C Dry 16h, obtains catalyst carrier.
According to Yb2O3And Fe2O3Molar ratio be 1:1 ratio, takes Yb2O3Presoma ytterbium nitrate and Fe2O3Presoma Mixed solution is made in ferric nitrate dissolving together, and the catalyst backbone for having been coated with carrier is put into mixed solution, impregnates 12h takes out catalyst backbone after having impregnated from mixed solution, and solution remaining in duct is purged to clean, Ran Houfang Enter and dry 16h in drying equipment at 120 DEG C, then put it into and calcine 5h in Muffle furnace at 700 DEG C, obtain SCR flue gases and take off Denox catalyst.
SCR catalyst for denitrating flue gas prepared by embodiment 1-3 is mounted on to the fixed bed reaction of SCR flue gas denitrification systems It is tested in device.Reaction pressure is normal pressure, reaction velocity 5000h-1, a concentration of the 500 of NO in SCR flue gas mixed gas ~3000mg/m3, reaction temperature is 300 DEG C~500 DEG C.
The active testing result of SCR catalyst for denitrating flue gas is shown in Fig. 4, is 300 DEG C -350 DEG C in flue-gas temperature, denitration efficiency Substantially more than 90%, when flue-gas temperature is 350 DEG C -500 DEG C, denitration efficiency can reach more than 95%, can effectively reach cigarette The effect of qi exhaustion nitre.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any this practical relationship or sequence.Moreover, term " comprising ", "comprising" or its any other variant are intended to Non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only include those Element, but also including other elements that are not explicitly listed or further include as this process, method, article or end The intrinsic element of end equipment.In the absence of more restrictions, limited by sentence " including ... " or " including ... " Element, it is not excluded that also there are other elements in the process including the element, method, article or terminal device.This Outside, herein, " being more than ", " being less than ", " being more than " etc. are interpreted as not including this number；" more than ", " following ", " within " etc. understandings It is to include this number.
It should be noted that although the various embodiments described above have been described herein, not thereby limit The scope of patent protection of the present invention.Therefore, based on the present invention innovative idea, to embodiment described herein carry out change and repair The equivalent structure or equivalent flow shift for changing or being made using description of the invention and accompanying drawing content, directly or indirectly will be with Upper technical solution is used in other related technical areas, is included within the scope of patent protection of the present invention.

Claims (10)

1. a kind of preparation method of SCR catalyst for denitrating flue gas, which is characterized in that include the following steps：
Skeleton forming：Ceramic fibre, ca silicate fibre, organic silicon sol and water are mixed, 1~6h of stirring at normal temperature obtains mixing and fills out Mixed fillers are prepared as catalyst backbone by material using die cast；
Skeleton is fired：By molding catalyst backbone in 80 DEG C~120 DEG C dry 6~12h, then at 800 DEG C~1200 DEG C Calcine 3~5h；After skeleton is fired, organic silicon sol decomposes, and crisscross gas channel is formed in catalyst backbone；
Carrier layer coats：The catalyst backbone baked is impregnated in 6~12h in TiO 2 sol, then 80 DEG C~120 DEG C Dry 12~for 24 hours, obtain catalyst carrier；
Active component loads：Catalyst carrier is impregnated in 6~12h in active component solution, then in 80 DEG C~120 DEG C dryings 12~for 24 hours, 3~5h is finally calcined at 400 DEG C~700 DEG C, obtains SCR catalyst for denitrating flue gas；
The active component solution preparation method includes step：Before the presoma and transition metal oxide of rare earth oxide It drives body and dissolves mixing in water, the molar ratio of the rare earth oxide and transition metal oxide is 1~4:1.
2. a kind of preparation method of SCR catalyst for denitrating flue gas according to claim 1, which is characterized in that the skeleton into In type step, ceramic fibre, ca silicate fibre, organic silicon sol and water weight ratio be 40-70:30-40:5-10:5-10.
A kind of 3. preparation method of SCR catalyst for denitrating flue gas according to claim 1, which is characterized in that the catalyst Air channel is provided in skeleton, the air channel is along the airintake direction setting of SCR flue gases and parallel distribution；The air channel Notch is set to the inlet end of the catalyst SCR flue gases, and the SCR flue gases enter in air channel, and along air channel slot body Gas channel carries out gas cleaning by catalyst.
A kind of 4. preparation method of SCR catalyst for denitrating flue gas according to claim 3, which is characterized in that the catalyst Blow-back slot is provided in skeleton, the blow-back slot and the air channel are staggeredly oppositely arranged, the blow-back slot Notch be set to the SCR flue gases outlet side of the catalyst；Purge gas squeezes into blow-back slot, and along blow-back slot slot The gas channel of body enters in air channel, and the dust accumulation in air channel is cleaned.
A kind of 5. preparation method of SCR catalyst for denitrating flue gas according to claim 3, which is characterized in that the catalyst Skeleton is bulk catalyst skeleton, and the width of the catalyst backbone longitudinal section is 0.8 meter~2.5 meters, the catalyst backbone The length of longitudinal section is 2.8 meters~4.5 meters, and the length of the catalyst backbone is 1.0 meters~2.2 meters.
6. the preparation method of catalyst according to claim 1, which is characterized in that the rare earth oxide for cerium, praseodymium, neodymium, Erbium, ytterbium oxide in it is one or more.
7. the preparation method of catalyst according to claim 1, which is characterized in that the transition metal oxide for tungsten, molybdenum, Chromium, nickel, iron oxide in it is one or more.
8. the preparation method of catalyst according to claim 1, which is characterized in that the preparation method of the TiO 2 sol For：Butyl titanate, absolute ethyl alcohol and water are mixed with TiO 2 sol, the butyl titanate, absolute ethyl alcohol and water Mass ratio be 1~10：45~49：45~49.
9. a kind of SCR catalyst for denitrating flue gas, which is characterized in that the denitrating catalyst is by claim 1-8 any one institute Preparation method is stated to be made.
10. a kind of SCR flue gas denitrification systems, which is characterized in that the catalyst that the SCR flue gas denitrification systems use will for right Seek the SCR catalyst for denitrating flue gas described in 9.
CN201711447939.2A 2017-12-27 2017-12-27 A kind of SCR catalyst for denitrating flue gas, preparation method and applications system Pending CN108187655A (en)

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2685009A1 (en) * 2007-04-26 2008-11-06 Johnson Matthey Public Limited Company Transition metal/zeolite scr catalysts
CN101357328A (en) * 2008-09-11 2009-02-04 南京工业大学 Fume denitration composite catalyst using titanium-base ceramics as carrier and preparation method thereof
CN101966410A (en) * 2010-10-22 2011-02-09 合肥丰德科技有限公司 Preparation method of high temperature resistant ceramic fiber gas filter material
CN104624183A (en) * 2015-01-24 2015-05-20 宁波高新区夏远科技有限公司 Preparation method of high-mechanical-strength SCR denitration catalyst
CN104998680A (en) * 2015-07-13 2015-10-28 煤炭工业济南设计研究院有限公司 Low temperature denitration catalyst for anti-SO2 and H2O poisoning and preparation method of same
CN204767895U (en) * 2015-07-24 2015-11-18 肖燕娟 High temperature dirty gas dust pelletizing system
CN105289676A (en) * 2015-10-27 2016-02-03 展宗城 Foam-like low-temperature SCR catalyst and preparation method thereof
CN105628453A (en) * 2016-02-01 2016-06-01 浙江天地环保工程有限公司 Novel smoke sampling device
CN106040317A (en) * 2016-06-01 2016-10-26 龙岩紫荆创新研究院 Method for structure reinforcement and activity recovery of inactivated denitration catalyst and regenerated catalyst
CN106861675A (en) * 2016-12-30 2017-06-20 大连瑞克科技有限公司 Cordierite honeycomb ceramic is integrated low temperature denitrating catalyst of matrix and preparation method thereof
CN107456994A (en) * 2017-06-27 2017-12-12 中国第汽车股份有限公司 High temperature honeycomb catalyst and preparation method thereof

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2685009A1 (en) * 2007-04-26 2008-11-06 Johnson Matthey Public Limited Company Transition metal/zeolite scr catalysts
CN101357328A (en) * 2008-09-11 2009-02-04 南京工业大学 Fume denitration composite catalyst using titanium-base ceramics as carrier and preparation method thereof
CN101966410A (en) * 2010-10-22 2011-02-09 合肥丰德科技有限公司 Preparation method of high temperature resistant ceramic fiber gas filter material
CN104624183A (en) * 2015-01-24 2015-05-20 宁波高新区夏远科技有限公司 Preparation method of high-mechanical-strength SCR denitration catalyst
CN104998680A (en) * 2015-07-13 2015-10-28 煤炭工业济南设计研究院有限公司 Low temperature denitration catalyst for anti-SO2 and H2O poisoning and preparation method of same
CN204767895U (en) * 2015-07-24 2015-11-18 肖燕娟 High temperature dirty gas dust pelletizing system
CN105289676A (en) * 2015-10-27 2016-02-03 展宗城 Foam-like low-temperature SCR catalyst and preparation method thereof
CN105628453A (en) * 2016-02-01 2016-06-01 浙江天地环保工程有限公司 Novel smoke sampling device
CN106040317A (en) * 2016-06-01 2016-10-26 龙岩紫荆创新研究院 Method for structure reinforcement and activity recovery of inactivated denitration catalyst and regenerated catalyst
CN106861675A (en) * 2016-12-30 2017-06-20 大连瑞克科技有限公司 Cordierite honeycomb ceramic is integrated low temperature denitrating catalyst of matrix and preparation method thereof
CN107456994A (en) * 2017-06-27 2017-12-12 中国第汽车股份有限公司 High temperature honeycomb catalyst and preparation method thereof

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