CN106693953A - Ti-based catalyst for coking flue gas denitrification and preparation method thereof - Google Patents
Ti-based catalyst for coking flue gas denitrification and preparation method thereof Download PDFInfo
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- CN106693953A CN106693953A CN201611230386.0A CN201611230386A CN106693953A CN 106693953 A CN106693953 A CN 106693953A CN 201611230386 A CN201611230386 A CN 201611230386A CN 106693953 A CN106693953 A CN 106693953A
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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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention relates to a Ti-based catalyst for coking flue gas denitrification and belongs to the field of denitrification catalysts. A preparation method comprises the steps of mixing, extrusion, drying and calcination. The mixing step comprises primary mixing, secondary mixing and third-time mixing. 300-400 parts of titanium tungsten powder by weight is added in the primary mixing, 240-300 parts of titanium tungsten powder by weight is added in the secondary mixing, and 240-300 parts of titanium tungsten powder by weight is added in the third-time mixing. The catalyst still has high catalytic activity at 150-250 DEG C and has the characteristics of being suitable for coking flue gas temperature, the catalyst can be protected from poisoning under high-sulfur conditions, catalyst blockage is avoided, and the service life of the catalyst is prolonged.
Description
Technical field
The invention belongs to catalyst technology and environmental protection technical field, it is related to a kind of technology of preparing of denitrating catalyst,
More particularly to it is a kind of for coking denitrating flue gas Ti-base catalyst and preparation method thereof.
Background technology
Coking chemistry industry (calling coking chemical in the following text) is a chief component of China's tradition Coal Chemical Industry, is also national
Economic mainstay industry, while the enterprise that still exports goods and earns foreign currency.Coking chemical, also known as coal high-temperature retorting, refers to that coal is completely cutting off
Under air conditionses, when being heated to 950~1050 DEG C, by drying, pyrolysis, dissolving is bonded, and solidification is shunk, and shaping etc. is physico
Stage.The coke of final system, while also obtaining the chemical products such as coal gas, tar.
Into the beginning of this century, with the rapid development of national economy, the coking chemical of China enters quick developing stage, removes
The coke output of China is influenceed by financial crisis within 2008, is declined slightly outward, is in the impetus of upward growth.
Coal chemical enterprise is a heavily contaminated unit, in addition to sewage.During coking, the heat that destructive distillation needs will be close to producer gas confession
Give.There are 80,000,000,000 m in China every year3Coke-stove gas is used for the thermal source of coking, to discharge band SO2, NOXThe m of flue gas about 672,000,000,0003, it is
This country has put into effect GB16171-2012 coking chemistry emission of industrial pollutants standards.
Coking industry flue-gas temperature is relatively low, and what domestic catalyst manufacturer generally produced is all high temperature catalyst, and is not applied to
In coking industry.So the catalyst for developing suitable coking industry denitration is very urgent.
The content of the invention
It is an object of the invention to provide one kind for coking denitrating flue gas Ti-base catalyst and preparation method thereof, can adapt to
The need for coking industry denitration, solving existing catalyst can not meet the present situation of coking industry needs.
Specifically, the present invention provides a kind of for coking denitrating flue gas Ti-base catalyst, it is characterised in that preparation method
Including mixing, extrusion is dried, and calcining step, wherein mixing step include once mixing, secondary mixing, three mixings, once mix
The titanium tungsten powder of 300-400 weight portions is added in refining, the titanium tungsten powder of 240-300 weight portions is added in secondary mixing, three mixings add
Enter the titanium tungsten powder of 240-300 weight portions.
In a specific embodiment of the invention, once mixing, secondary mixing and in three mixings titanium tungsten powder use
The weight proportion of amount is 4：3：3.
In a specific embodiment of the invention, one time mixing step is：By the titanium tungsten powder of 300-400 weight portions,
The titanium tungsten silica flour of 100-150 weight portions is kneaded in being put into kneading machine, and the mass concentration for adding 3-5 weight portions is 50%
Lactic acid, the mass concentration of the stearic acid, the deionized water of 200-250 weight portions and 50-70 weight portions of 5-8 weight portions is 25%
Ammoniacal liquor is kneaded.
In a specific embodiment of the invention, secondary mixing is：After once kneading, by 240-300 weight portions
Titanium tungsten powder, 40-60 parts of deionized water, the mass concentration of 15-20 weight portions is that 25% ammoniacal liquor is added to once mixing and obtains
Batch mixing in kneaded.
In a specific embodiment of the invention, three mixings are：After secondary mixing, by 240-300 weight portions
The mass concentration of titanium tungsten powder and 40-60 weight portions is that 25% ammoniacal liquor is added to secondary mixing and kneaded in the batch mixing that obtains.
In a specific embodiment of the invention, mixing also includes four mixings, five mixings, wherein four times mixed
Refining：After three mixings, by the glass fibre of 40-60 weight portions, 3-5 weight portion wood pulp cottons, the MEA of 40-60 weight portions,
The ammonium metavanadate solution of 50-70 weight portions, the deionized water of 50-80 weight portions is carried out in being added to the batch mixing that three mixings are obtained
Mixing；Five mixings：After four mixings, by the sodium carboxymethylcellulose of 1-6 weight portions and the polyoxyethylene of 2.2-4.5 weight portions
Alkene, the mass concentration of 20-30 weight portions is that 25% ammoniacal liquor and the deionized water of 40-60 weight portions are added to four mixings and obtain
Batch mixing in kneaded.
In one preferred embodiment of the invention, prepared by ammonium metavanadate solution, is added in ammonium metavanadate retort
The MEA of the deionized water of 100 weight portions and 12 weight portions, when temperature >=90 DEG C, adds ammonium metavanadate (AMV) 10 weight
Amount part, continues to be heated to temperature and is shown as 98 ± 2 DEG C, and keep at least 50min.
In one preferred embodiment of the invention, each mixing time is 10-40 minutes.
In one preferred embodiment of the invention, drying includes：Primary drying, 25-55 DEG C of temperature, humidity 20-
80%, drying time is 8-10 days；Redrying, temperature is 65-70 DEG C, is dried 2-3 days.
In one preferred embodiment of the invention, calcining includes that 200-300 DEG C is calcined 5-8 hours, and 600-700 DEG C is forged
Burn 5-8 hours.
In a specific embodiment of the invention, the preparation method includes：Mixing, extrusion is dried, calcining step
Suddenly；
(1) mixing step：
Once knead：The titanium tungsten powder of 300-400 weight portions, the titanium tungsten silica flour of 100-150 weight portions are put into kneading machine
Kneaded, in the lactic acid that the mass concentration of addition 3-5 weight portions is 50%, the stearic acid of 5-8 weight portions, 200-250 weight
The deionized water of part and the ammoniacal liquor that the mass concentration of 50-70 weight portions is 25% are kneaded；
Secondary mixing：After once kneading, by the titanium tungsten powder of 240-300 weight portions, 40-60 parts of deionized water, 15-20 weights
Measure part mass concentration be 25% ammoniacal liquor be added to the batch mixing for once kneading and obtaining in kneaded；
Three mixings：After secondary mixing, the mass concentration by the titanium tungsten powder of 240-300 weight portions and 40-60 weight portions is
25% ammoniacal liquor is kneaded in being added to the secondary batch mixing for kneading and obtaining；
Four mixings：After three mixings, by the glass fibre of 40-60 weight portions, 3-5 weight portion wood pulp cottons, 40-60 weight
The MEA of part, the ammonium metavanadate solution of 50-70 weight portions, the deionized water of 50-80 weight portions is added to three times and kneads
To batch mixing in kneaded；
Five mixings：After four mixings, by the sodium carboxymethylcellulose of 1-6 weight portions and the polyoxy of 2.2-4.5 weight portions
Change ethene, the mass concentration of 20-30 weight portions is that 25% ammoniacal liquor and the deionized water of 40-60 weight portions are added to four mixings
Kneaded in the batch mixing for obtaining；
Each mixing time is 10-40 minutes；
(2) extrusion step：Filtered during batch mixing is added into filter, pre-extruded in pre-extruded machine is added to after filtering, it is rearmounted
It is extruded as in extruder cellular；It is old 10-15 hours；
(3) drying steps：
Primary drying, 25-55 DEG C of temperature, humidity 20-80%, drying time is 8-10 days；
Redrying, temperature is 65-70 DEG C, is dried 2-3 days；
(4) calcining step
200-300 DEG C is calcined 5-8 hours, and 600-700 DEG C is calcined 5-8 hours.
Another aspect of the present invention is to provide a kind of preparation method for coking denitrating flue gas Ti-base catalyst, its feature
It is that preparation method includes mixing, extrusion is dried, and calcining step, wherein mixing step include once mixing, secondary mixing, three
Secondary mixing, adds the titanium tungsten powder of 300-400 weight portions in once kneading, the titanium tungsten of 240-300 weight portions is added in secondary mixing
Powder, three mixings add the titanium tungsten powder of 240-300 weight portions.
In a specific embodiment of the invention, once mixing, secondary mixing and in three mixings titanium tungsten powder use
The weight proportion of amount is 4：3：3.
In a specific embodiment of the invention, one time mixing step is：By the titanium tungsten powder of 300-400 weight portions,
The titanium tungsten silica flour of 100-150 weight portions is kneaded in being put into kneading machine, and the mass concentration for adding 3-5 weight portions is 50%
Lactic acid, the mass concentration of the stearic acid, the deionized water of 200-250 weight portions and 50-70 weight portions of 5-8 weight portions is 25%
Ammoniacal liquor is kneaded.
In a specific embodiment of the invention, secondary mixing is：After once kneading, by 240-300 weight portions
Titanium tungsten powder, 40-60 parts of deionized water, the mass concentration of 15-20 weight portions is that 25% ammoniacal liquor is added to once mixing and obtains
Batch mixing in kneaded.
In a specific embodiment of the invention, three mixings are：After secondary mixing, by 240-300 weight portions
The mass concentration of titanium tungsten powder and 40-60 weight portions is that 25% ammoniacal liquor is added to secondary mixing and kneaded in the batch mixing that obtains.
In a specific embodiment of the invention, mixing also includes four mixings, five mixings, wherein four times mixed
Refining：After three mixings, by the glass fibre of 40-60 weight portions, 3-5 weight portion wood pulp cottons, the MEA of 40-60 weight portions,
The ammonium metavanadate solution of 50-70 weight portions, the deionized water of 50-80 weight portions is carried out in being added to the batch mixing that three mixings are obtained
Mixing；Five mixings：After four mixings, by the sodium carboxymethylcellulose of 1-6 weight portions and the polyoxyethylene of 2.2-4.5 weight portions
Alkene, the mass concentration of 20-30 weight portions is that 25% ammoniacal liquor and the deionized water of 40-60 weight portions are added to four mixings and obtain
Batch mixing in kneaded.
In one preferred embodiment of the invention, prepared by ammonium metavanadate solution, is added in ammonium metavanadate retort
The MEA of the deionized water of 100 weight portions and 12 weight portions, when temperature >=90 DEG C, adds ammonium metavanadate (AMV) 10 weight
Amount part, continues to be heated to temperature and is shown as 98 ± 2 DEG C, and keep at least 50min.
In one preferred embodiment of the invention, each mixing time is 10-40 minutes.
In one preferred embodiment of the invention, drying includes：Primary drying, 25-55 DEG C of temperature, humidity 20-
80%, drying time is 8-10 days；Redrying, temperature is 65-70 DEG C, is dried 2-3 days.
In one preferred embodiment of the invention, calcining includes that 200-300 DEG C is calcined 5-8 hours, and 600-700 DEG C is forged
Burn 5-8 hours.
In a specific embodiment of the invention, the preparation method includes：Mixing, extrusion is dried, calcining step
Suddenly；
(1) mixing step：
Once knead：The titanium tungsten powder of 300-400 weight portions, the titanium tungsten silica flour of 100-150 weight portions are put into kneading machine
Kneaded, in the lactic acid that the mass concentration of addition 3-5 weight portions is 50%, the stearic acid of 5-8 weight portions, 200-250 weight
The deionized water of part and the ammoniacal liquor that the mass concentration of 50-70 weight portions is 25% are kneaded；
Secondary mixing：After once kneading, by the titanium tungsten powder of 240-300 weight portions, 40-60 parts of deionized water, 15-20 weights
Measure part mass concentration be 25% ammoniacal liquor be added to the batch mixing for once kneading and obtaining in kneaded；
Three mixings：After secondary mixing, the mass concentration by the titanium tungsten powder of 240-300 weight portions and 40-60 weight portions is
25% ammoniacal liquor is kneaded in being added to the secondary batch mixing for kneading and obtaining；
Four mixings：After three mixings, by the glass fibre of 40-60 weight portions, 3-5 weight portion wood pulp cottons, 40-60 weight
The MEA of part, the ammonium metavanadate solution of 50-70 weight portions, the deionized water of 50-80 weight portions is added to three times and kneads
To batch mixing in kneaded；
Five mixings：After four mixings, by the sodium carboxymethylcellulose of 1-6 weight portions and the polyoxy of 2.2-4.5 weight portions
Change ethene, the mass concentration of 20-30 weight portions is that 25% ammoniacal liquor and the deionized water of 40-60 weight portions are added to four mixings
Kneaded in the batch mixing for obtaining；
Each mixing time is 10-40 minutes；
(2) extrusion step：Filtered during batch mixing is added into filter, pre-extruded in pre-extruded machine is added to after filtering, it is rearmounted
It is extruded as in extruder cellular；It is old 10-15 hours；
(3) drying steps：
Primary drying, 25-55 DEG C of temperature, humidity 20-80%, drying time is 8-10 days；
Redrying, temperature is 65-70 DEG C, is dried 2-3 days；
(4) calcining step
200-300 DEG C is calcined 5-8 hours, and 600-700 DEG C is calcined 5-8 hours.
Beneficial effect：Two kinds of carriers of titanium tungsten powder and titanium tungsten silica flour are used in the present invention, while titanium tungsten powder is in three times by specific
Proportioning is added, and substantially increases the surface area of carrier and the dispersing uniformity of active component, and then improve catalysis activity.Together
When the present invention in, using repeatedly mixing, various raw materials are added by specific proportioning stage by stage, make fully anti-between various materials
Should, catalysis activity is improve, while having widened the active temperature windows of denitrating catalyst.It is low that the present invention can meet coking industry
The denitration demand of warm flue gas, the denitrating catalyst that the method for preparing catalyst that the present invention is provided is prepared has compressive resistance
Height, preparation method is ripe, easy-formation, easily prepares, high catalytic efficiency, and sulphur conversion ratio ＜ 0.5%, while the advantages of water resistant.
Weight portion of the invention can simultaneously replace known unit of weight, such as gram, kilogram, kilogram etc..
Specific embodiment
The present invention is further specifically described by the following examples, and these embodiments are only used for the purpose for illustrating, and
Do not limit the scope of the invention.
Embodiment 1
(1) mixing step：
Once knead：320kg titanium tungsten powder, 100kg titanium tungstens silica flour are added in kneading machine, 100rpm operation kneading machines, then
Add the lactic acid that 3kg mass concentrations are 50%, 5kg stearic acid, 200kg deionized waters and the ammonia that 50kg mass concentrations are 25%
Water, by above material mixing, 500rpm runs at high speed kneading machine 10min；
Secondary mixing：After once kneading, by 240kg titanium tungsten powder, 40kg deionized waters, 15kg mass concentrations are 25% ammonia
Water is kneaded in being added to the batch mixing for once kneading and obtaining, and 500rpm runs at high speed kneading machine 20min；
Three mixings：After secondary mixing, 240kg titanium tungstens powder and ammoniacal liquor that 40kg mass concentrations are 25% are added to secondary
Kneaded in the batch mixing that obtains of mixing, 500rpm kneading machine to the material moistures that run at high speed are less than 24%；
Four mixings：After three mixings, by 40kg glass fibres, 3kg wood pulp cottons, 40kg MEAs, 50kg go from
Sub- water, the ammonium metavanadate solution for having configured of 50kg is kneaded in being added to the batch mixing that three mixings are obtained, and 500rpm is at a high speed
Operating kneading machine 30min；
Five mixings：After four mixings, by 2kg sodium carboxymethylcelluloses and 2.2kg polyethylene glycol oxides, 20kg mass concentrations
Ammoniacal liquor and 40kg deionized waters for 25% are added to knead for four times and kneaded in the batch mixing that obtains, and 500rpm runs at high speed mixed
Mill 20min.The moisture and pH of material are adjusted, moisture is 25-18%, and pH is more than 7.5；
(2) extrusion step：
Will batch mixing add filter in filter, pre-extruded in pre-extruded machine is added to after filtering, after be placed in extruder squeeze
Go out as cellular (20 × 20 hole)；The catalyst of extrusion is cut, and meets the length of formulation；By the catalyst of extrusion molding
It is put on pallet, is put in old 12 hours in hothouse；
(3) drying steps：
Primary drying, 25 DEG C of temperature, humidity 30%, drying time is 8 days；
Redrying, temperature is 65 DEG C, is dried 2 days, is dried after catalyst weight is no longer reduced and stopped；
(4) calcining step：
200 DEG C are calcined 5 hours, and 650 DEG C are calcined 6 hours；
It is prepared by the ammonium metavanadate solution：100L deionized waters and 12kg monoethanols are added in ammonium metavanadate retort
Amine, when temperature >=90 DEG C, adds ammonium metavanadate (AMV) 10kg, continues to be heated to temperature and is shown as 98 ± 2 DEG C, and keeps extremely
Few 50min.
Embodiment 2
(1) mixing step：
Once knead：360kg titanium tungsten powder, 120kg titanium tungstens silica flour are added in kneading machine, 100rpm operation kneading machines, then
Add the lactic acid that 4kg mass concentrations are 50%, the stearic acid of 4kg, 220kg deionized waters and the ammonia that 60kg mass concentrations are 25%
Water, by above material mixing, 500rpm runs at high speed kneading machine 10min；
Secondary mixing：After once kneading, by 270kg titanium tungsten powder, 50kg deionized waters, 18kg mass concentrations are 25% ammonia
Water is kneaded in being added to the batch mixing for once kneading and obtaining, and 500rpm runs at high speed kneading machine 20min；
Three mixings：After secondary mixing, 270kg titanium tungstens powder and ammoniacal liquor that 50kg mass concentrations are 25% are added to secondary
Kneaded in the batch mixing that obtains of mixing, 500rpm kneading machine to the material moistures that run at high speed are less than 24%；
Four mixings：After three mixings, by 50kg glass fibres, 4kg wood pulp cottons, 50kg MEAs, 60kg deionizations
Water, the ammonium metavanadate solution that 60kg is configured is kneaded in being added to the batch mixing that three mixings are obtained, and 500rpm runs at high speed
Kneading machine 30min；
Five mixings：After four mixings, by 3kg sodium carboxymethylcelluloses and the polyethylene glycol oxide of 3.2kg, 25kg mass is dense
Spend and kneaded for 25% ammoniacal liquor and 50kg deionized waters are added in the batch mixing that four mixings are obtained, 500rpm runs at high speed mixed
Mill 20min.The moisture and pH of material are adjusted, moisture is 25-18%, and pH is more than 7.5；
(2) extrusion step：
Will batch mixing add filter in filter, pre-extruded in pre-extruded machine is added to after filtering, after be placed in extruder squeeze
Go out as cellular (20 × 20 hole)；The catalyst of extrusion is cut, and meets the length of formulation；By the catalyst of extrusion molding
It is put on pallet, is put in old 12 hours in hothouse；
(3) drying steps：
Primary drying, 40 DEG C of temperature, humidity 50%, drying time is 9 days；
Redrying, temperature is 68 DEG C, is dried 2.5 days, is dried after catalyst weight is no longer reduced and stopped；
(4) calcining step：
250 DEG C are calcined 5.5 hours, and 675 DEG C are calcined 7 hours；
It is prepared by the ammonium metavanadate solution：The deionized water of 100L and single second of 12kg are added in ammonium metavanadate retort
Hydramine, when temperature >=90 DEG C, adds ammonium metavanadate (AMV) 10kg, continues to be heated to temperature to be shown as 98 ± 2 DEG C, and keep
At least 50min.
Embodiment 3
(1) mixing step：
Once knead：400kg titanium tungsten powder, 150kg titanium tungstens silica flour are added in kneading machine, 100rpm operation kneading machines, then
Add the lactic acid that 5kg mass concentrations are 50%, 8kg stearic acid, 250kg deionized waters and the ammonia that 70kg mass concentrations are 25%
Water, by above material mixing, 500rpm runs at high speed kneading machine 10min；
Secondary mixing：After once kneading, by 300kg titanium tungsten powder, 60kg deionized waters, 20kg mass concentrations are 25% ammonia
Water is kneaded in being added to the batch mixing for once kneading and obtaining, and 500rpm runs at high speed kneading machine 20min；
Three mixings：After secondary mixing, 300kg titanium tungstens powder and ammoniacal liquor that 60kg mass concentrations are 25% are added to secondary
Kneaded in the batch mixing that obtains of mixing, 500rpm kneading machine to the material moistures that run at high speed are less than 24%；
Four mixings：After three mixings, by 60kg glass fibres, 5kg wood pulp cottons, 60kg MEAs, 60kg deionizations
Water, the ammonium metavanadate solution that 70kg is configured is kneaded in being added to the batch mixing that three mixings are obtained, and 500rpm runs at high speed
Kneading machine 30min；
Five mixings：After four mixings, by 6kg sodium carboxymethylcelluloses and 4.5kg polyethylene glycol oxides, 30kg mass concentrations
Ammoniacal liquor and 60kg deionized waters for 25% are added to knead for four times and kneaded in the batch mixing that obtains, and 500rpm runs at high speed mixed
Mill 20min；The moisture and pH of material are adjusted, moisture is 25-18%, and pH is more than 7.5；
(2) extrusion step：
Will batch mixing add filter in filter, pre-extruded in pre-extruded machine is added to after filtering, after be placed in extruder squeeze
Go out as cellular (20 × 20 hole)；The catalyst of extrusion is cut, and meets the length of formulation；By the catalyst of extrusion molding
It is put on pallet, is put in old 12 hours in hothouse；
(3) drying steps：
Primary drying, 55 DEG C of temperature, humidity 70%, drying time is 10 days；
Redrying, temperature is 70 DEG C, is dried 3 days, is dried after catalyst weight is no longer reduced and stopped；
(4) calcining step：
300 DEG C are calcined 6 hours, and 700 DEG C are calcined 8 hours；
It is prepared by the ammonium metavanadate solution：100L deionized waters and 12kg monoethanols are added in ammonium metavanadate retort
Amine, when temperature >=90 DEG C, adds ammonium metavanadate (AMV) 10kg, continues to be heated to temperature and is shown as 98 ± 2 DEG C, and keeps extremely
Few 50min.
Comparative example 1 (omits MEA) in four mixings
Four mixings：After three mixings, by 40kg glass fibres, 3kg wood pulp cottons, the deionized water of 50kg, 50kg's matches somebody with somebody
The ammonium metavanadate solution put is added to knead for three times and kneaded in the batch mixing that obtains, and 500rpm runs at high speed kneading machine
30min；
Other are with embodiment 1.
The performance test of embodiment 4
At a temperature of 150-250 DEG C, by the simulated flue gas of nitrogen oxides and sulfur dioxide be passed through above-described embodiment 1-3 with
And in the catalyst sample of the preparation of comparative example 1, denitration efficiency is tested, as a result as shown in table 1.
The performance test results of catalyst prepared by the embodiment of the present invention of table 1 and comparative example
Claims (10)
1. a kind of to be used for coking denitrating flue gas Ti-base catalyst, it is characterised in that preparation method includes mixing, extrusion is dried, forged
Step is burnt, wherein mixing step includes once mixing, secondary mixing, three mixings, 300-400 weight portions are added in once kneading
Titanium tungsten powder, in secondary mixing add 240-300 weight portions titanium tungsten powder, three times mixing add 240-300 weight portions titanium tungstens
Powder.
2. coking denitrating flue gas Ti-base catalyst is used for as claimed in claim 1, and one time mixing step is：By 300-400 weights
The titanium tungsten powder of part is measured, the titanium tungsten silica flour of 100-150 weight portions is kneaded in being put into kneading machine, adds the matter of 3-5 weight portions
Amount concentration is 50% lactic acid, the matter of the stearic acid, the deionized water of 200-250 weight portions and 50-70 weight portions of 5-8 weight portions
The ammoniacal liquor that concentration is 25% is measured to be kneaded.
3. coking denitrating flue gas Ti-base catalyst is used for as claimed in claim 1, and secondary mixing is：After once kneading, will
The titanium tungsten powder of 240-300 weight portions, 40-60 parts of deionized water, the mass concentration of 15-20 weight portions is 25% ammoniacal liquor addition
Kneaded in the batch mixing that obtains to once being kneaded.
4. coking denitrating flue gas Ti-base catalyst is used for as claimed in claim 1, and three mixings are：After secondary mixing, will
The titanium tungsten powder of 240-300 weight portions and the ammoniacal liquor that the mass concentration of 40-60 weight portions is 25% are added to secondary mixing and obtain
Kneaded in batch mixing.
5. a kind of preparation method for coking denitrating flue gas Ti-base catalyst, it is characterised in that preparation method includes mixing, squeezes
Go out, dry, calcining step, wherein mixing step include once mixing, secondary mixing, three mixings, are added in once kneading
The titanium tungsten powder of 300-400 weight portions, adds the titanium tungsten powder of 240-300 weight portions in secondary mixing, three mixings add 240-300
The titanium tungsten powder of weight portion.
6. the preparation method for coking denitrating flue gas Ti-base catalyst according to claim 5, one time mixing step is：
The titanium tungsten powder of 300-400 weight portions, the titanium tungsten silica flour of 100-150 weight portions are kneaded in being put into kneading machine, 3-5 is added
The mass concentration of weight portion is 50% lactic acid, the stearic acid of 5-8 weight portions, the deionized water of 200-250 weight portions and 50-70
The mass concentration of weight portion is that 25% ammoniacal liquor is kneaded.
7. the preparation method for coking denitrating flue gas Ti-base catalyst according to claim 5, secondary mixing is：Once
After mixing, by the titanium tungsten powder of 240-300 weight portions, 40-60 parts of deionized water, the mass concentration of 15-20 weight portions is 25%
Ammoniacal liquor be added to the batch mixing for once kneading and obtaining in kneaded.
8. the preparation method for coking denitrating flue gas Ti-base catalyst according to claim 5, three mixings are：It is secondary
After mixing, the mass concentration by the titanium tungsten powder of 240-300 weight portions and 40-60 weight portions be 25% ammoniacal liquor be added to it is secondary mixed
Kneaded in the batch mixing that refining is obtained.
9. the preparation method for coking denitrating flue gas Ti-base catalyst according to claim 5, kneads also including four times
Mixing, five mixings, wherein four mixings：After three mixings, by the glass fibre of 40-60 weight portions, 3-5 weight portion wood pulps
Cotton, the MEA of 40-60 weight portions, the ammonium metavanadate solution of 50-70 weight portions, the deionized water of 50-80 weight portions is added
Kneaded in the batch mixing obtained to three mixings；Five mixings：After four mixings, by the carboxymethylcellulose calcium of 1-6 weight portions
The polyethylene glycol oxide of sodium and 2.2-4.5 weight portions, the mass concentration of 20-30 weight portions is 25% ammoniacal liquor and 40-60 weight portions
Deionized water be added to knead for four times and kneaded in the batch mixing that obtains.
10. the preparation method for coking denitrating flue gas Ti-base catalyst according to claim 5, the preparation method bag
Include：Mixing, extrusion is dried, calcining step；
(1) mixing step：
Once knead：The titanium tungsten powder of 300-400 weight portions, the titanium tungsten silica flour of 100-150 weight portions are carried out in being put into kneading machine
Mixing, in the lactic acid that the mass concentration for adding 3-5 weight portions is 50%, the stearic acid of 5-8 weight portions, 200-250 weight portions
The mass concentration of deionized water and 50-70 weight portions is that 25% ammoniacal liquor is kneaded；
Secondary mixing：After once kneading, by the titanium tungsten powder of 240-300 weight portions, 40-60 parts of deionized water, 15-20 weight portions
Mass concentration be 25% ammoniacal liquor be added to the batch mixing for once kneading and obtaining in kneaded；
Three mixings：It is 25% by the mass concentration of the titanium tungsten powder of 240-300 weight portions and 40-60 weight portions after secondary mixing
Ammoniacal liquor be added to secondary mixing and kneaded in the batch mixing that obtains；
Four mixings：After three mixings, by the glass fibre of 40-60 weight portions, 3-5 weight portion wood pulp cottons, 40-60 weight portions
MEA, the ammonium metavanadate solution of 50-70 weight portions, the deionized water of 50-80 weight portions is added to three times and kneads what is obtained
Kneaded in batch mixing；
Five mixings：After four mixings, by the sodium carboxymethylcellulose of 1-6 weight portions and the polyoxyethylene of 2.2-4.5 weight portions
Alkene, the mass concentration of 20-30 weight portions is that 25% ammoniacal liquor and the deionized water of 40-60 weight portions are added to four mixings and obtain
Batch mixing in kneaded；
(2) extrusion step：Will batch mixing add filter in filter, pre-extruded in pre-extruded machine is added to after filtering, after be placed in it is crowded
Go out in machine to be extruded as cellular；It is old 10-15 hours；
(3) drying steps：
Primary drying, 25-55 DEG C of temperature, humidity 20-80%, drying time is 8-10 days；
Redrying, temperature is 65-70 DEG C, is dried 2-3 days；
(4) calcining step
200-300 DEG C is calcined 5-8 hours, and 600-700 DEG C is calcined 5-8 hours.
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| CN102861595A (en) * | 2012-09-20 | 2013-01-09 | 浙江天蓝环保技术股份有限公司 | Honeycombed SCR (selective catalytic reduction) denitrification catalyst for low-temperature flue gas denitrification and preparation method thereof |
| JP2013193938A (en) * | 2012-03-21 | 2013-09-30 | Nippon Shokubai Co Ltd | Denitration catalyst, method of preparing the same, and method of denitration |
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| CN106622214A (en) * | 2016-12-16 | 2017-05-10 | 内蒙古华元科技有限公司 | Flue gas denitrification titanium-based catalyst for ceramic and preparation method of catalyst |
| CN106732703A (en) * | 2016-12-16 | 2017-05-31 | 内蒙古华元科技有限公司 | One kind is for smoke denitration of cement plant Ti-base catalyst and preparation method thereof |
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