CN106492633A - Denitration honeycomb heat accumulation body and preparation method thereof - Google Patents
Denitration honeycomb heat accumulation body and preparation method thereof Download PDFInfo
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- 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
- B01D53/88—Handling or mounting catalysts
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- 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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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
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- B01D2255/20738—Iron
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Abstract
The invention discloses a kind of denitration honeycomb heat accumulation body and preparation method thereof.The denitration honeycomb heat accumulation body includes：Inorganic powder, denitrating catalyst and additive.The denitration honeycomb heat accumulation body has the function of denitration and accumulation of heat, hardness height (axial mechanical strength is up to more than 2.5MPa) concurrently, and the denitration activity of denitration honeycomb heat accumulation body may be up to 96%.
Description
Technical field
The invention belongs to honeycomb heat accumulation body field, specifically, the present invention relates to denitration honeycomb heat accumulation body and its preparation side
Method.
Background technology
As the Fossil fuels such as the fast development of China's economy, natural gas, oil and coal are more widely used, make
Obtain the environmental problems such as acid rain, depletion of the ozone layer, greenhouse effect increasingly serious.The energy resource structure of China based on coal, this energy
Source structure determines that the nitrogen oxides and sulfur oxide emission of China are constantly in high situation.A large amount of nitrogen oxides
With the discharge of sulfur oxide contamination gas so that environmental problem is increasingly serious, the production life of our people is not only had a strong impact on
Living, and it is unfavorable for the sustainable development of China's economy.Therefore, environmental problem has obtained national increasing concern.
The NO of mankind's activity dischargexMore than 90% from fuel combustion process.Various industrial furnaces, Civil energy-saving cooking stove, motor-driven
During high temp. combustion of fuel in car and other internal combustion engines, the nitrogen substance oxidation in fuel generates NOx, participate in the air of burning
N2And O2NO can also be generatedx.From the point of view of energy resource structure, in the primary energy of China and power generation energy resource composition, coal is occupied definitely
Leading position.And the coal of China more than 80% is directly burning, is particularly used for power station, Industrial Boiler and civil boiler
In.Therefore, the NO in considerably long period, in flue gasxDischarge is to cause China air NOxOne principal element of pollution, how
Reduce the NO of fixed source emissionxIt is an important topic of atmospheric environment improvement.
Therefore, how the NO in flue gas is effectively reducedxThe problems demand of disposal of pollutants is solved.
Content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.For this purpose, the present invention
One purpose is to propose a kind of denitration honeycomb heat accumulation body and preparation method thereof.The denitration honeycomb heat accumulation body has denitration and accumulation of heat concurrently
Function, hardness height (axial mechanical strength may be up to more than 2.5MPa), and the denitration activity of denitration honeycomb heat accumulation body may be up to
96%.
For this purpose, in one aspect of the invention, the present invention proposes a kind of denitration honeycomb heat accumulation body.Reality according to the present invention
Example is applied, the denitration honeycomb heat accumulation body includes：Inorganic powder, denitrating catalyst and additive.Thus, the denitration honeycomb heat accumulation body
Have the function of denitration and accumulation of heat, hardness height (axial mechanical strength may be up to more than 2.5MPa), and denitration honeycomb heat accumulation body concurrently
Denitration activity may be up to 96%, while heat storage and denitrating catalyst need not be separately provided, can save arrangement space, save into
This, and acted on by the accumulation of heat of heat storage, it is arranged as needed, the catalyst stabilization in heat storage can be made most suitable
Denitration reaction is preferably carried out in temperature range, and denitration efficiency is high, and emission reduction effect is notable.
In addition, denitration honeycomb heat accumulation body according to the above embodiment of the present invention can also have the technology that adds as follows special
Levy：
In some embodiments of the invention, the denitration honeycomb heat accumulation body includes：50～100 weight portions described inorganic
Powder；The denitrating catalyst of 5～40 weight portions；And 1～10 weight portion the additive.Thus, be conducive to improving
The denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, the inorganic powder includes：The flint clay of 20～50 weight portions；15～40 weights
The cordierite of amount part；The Kaolin of 6～20 weight portions；And 15～30 weight portion quartz.Thus, it is possible to further improve de-
The denitration of nitre honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, the denitrating catalyst includes：The TiO of 10～60 weight portions2-Al2O3Compound
Oxide carrier；The main active component of the activated carbon of 10～50 weight portions；The V of 5～20 weight portions2O5-WO3Composite oxides are aided in
Active component；And 0.1～20 weight portion auxiliary agent, wherein, the auxiliary agent is ferrum and lanthanum.Thus, it is possible to further improve de-
The denitration of nitre honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, the TiO2-Al2O3In composite oxide carrier Ti and Al elements mole
Than for 1：(0.01～2).Thus, it is possible to further improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, the V2O5-WO3V and W elements in composite oxides Supplementary active compounds
Mol ratio is 1：(0.1～5).Thus, it is possible to further improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, in the auxiliary agent, the quality of ferrum and lanthanum is separately the denitration honeycomb
The 0.1～10% of heat storage gross mass.Thus, it is possible to further improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, the additive includes：The enamel of 1～10 weight portion；1～5 weight portion
Binding agent, lubricant and plasticising wetting agent.Thus, it is possible to further improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, the binding agent is methylcellulose.Thus, it is possible to further improve denitration
Honeycomb heat accumulation body denitration and heat storage performance.
In some embodiments of the invention, the lubricant and plasticising wetting agent are glycerol.Thus, it is possible to further
Improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In another aspect of the invention, the present invention proposes a kind of method for preparing above-mentioned denitration honeycomb heat accumulation body.Root
According to embodiments of the invention, the method includes：
(1) inorganic powder, additive and water are carried out mixer kneader refining, to obtain pug；
(2) pug is carried out old, vacuum refining and vacuum is extruded, to obtain honeycomb ceramics stock；
(3) the honeycomb ceramics stock is shaped, dried and is fired, to obtain heat storage idiosome；
(4) titanium source solution, silicon source solution and ammonia are co-precipitated, to obtain containing titanium hydroxide and aluminium hydroxide
Precipitation mixture, and activated carbon is mixed with the precipitation mixture containing titanium hydroxide and aluminium hydroxide；
(5) ammonium metatungstate, ammonium metavanadate reagent are dissolved in oxalic acid；
(6) iron chloride and lanthanum chloride are mixed with step (5) resulting solution, to obtain containing tungsten, vanadium, ferrum, lanthanum
Mixed solution；
(7) it is heavy containing activated carbon obtained by step (4) to impregnated in after the heat storage idiosome being carried out acidification
In the mixture of shallow lake；
(8) heat storage obtained in step (7) is dried and calcination process；
(9) by the solid impregnating that step (8) is obtained enter isopyknic described containing tungsten, vanadium, ferrum, the mixed solution of lanthanum in,
And it is dried and calcination process, to obtain denitration honeycomb heat accumulation body.
Thus, according to the method for preparing denitration honeycomb heat accumulation body proposed by the present invention by being urged using the denitration of honeycomb ceramics shape
Agent, can cause the specific surface area of denitrating catalyst big compared to other shapes (such as spherical, cylindrical shape etc.), be conducive to increasing
Big denitrating catalyst and the contact area of reaction medium, so that improve the efficiency of denitration reaction.When denitrating catalyst is honeycomb ceramics
During shape, the specific surface area of denitrating catalyst is in 320m2/m3More than, mechanical strength is more than 2.5MPa, the catalysis of nitrogen oxides reduction
Activity may be up to 96%.Denitrating catalyst is with TiO2-Al2O3Composite oxides are carrier, with activated carbon as main active,
V2O5-WO3For Supplementary active ingredients, and rare-earth elements of lanthanum (La) is mixed as auxiliary agent, wherein, activated carbon has very flourishing
Gap structure and huge specific surface area, thus with very strong adsorptivity, meanwhile, because activated carbon surface contains polynary oxygen-containing official
Can roll into a ball, the SO in energy Preferential adsorption flue gas2And vapor, it is aoxidized and generates H2SO4, thus, add in denitrating catalyst
Activated carbon neither affects the activity of denitrating catalyst, moreover it is possible to significantly increase the anti-SO of denitrating catalyst2With vapour resistant toxic
Energy.By ferrum and lanthanum being added in denitration honeycomb heat accumulation body, can significantly improve the low temperature active of denitrating catalyst.By taking off
Denox catalyst is carried on denitration honeycomb heat accumulation body, makes denitration honeycomb heat accumulation body have the function of accumulation of heat and denitration concurrently, so as to need not
Heat storage and denitrating catalyst is separately provided, so arrangement space can be saved, cost-effective.Storage by denitration honeycomb heat accumulation body
Heat effect, is arranged as needed, and the denitrating catalyst in denitration honeycomb regenerator body can be made stable in optimal temperature model
Denitration reaction is carried out in enclosing, and denitration efficiency is high, and emission reduction effect is notable.
In addition, the method for preparing denitration honeycomb heat accumulation body according to the above embodiment of the present invention can also have following adding
Technical characteristic：
In some embodiments of the invention, in step (2), the old temperature is 15～25 degrees Celsius, the time
For 24～48 hours.Thus, it is possible to significantly improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, in step (3), the temperature of the firing is 1200～1400 degrees Celsius.
Thus, it is possible to significantly improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, in step (4), the mixing containing titanium source solution, silicon source solution and ammonia
The pH of liquid is 9～11.Thus, it is possible to significantly improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, in step (5), containing ammonium metatungstate, ammonium metavanadate reagent and oxalic acid
The pH of mixed liquor is 5～7.Thus, it is possible to significantly improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, in step (7), the temperature of the dipping is 35～60 degrees Celsius, the time
For 8～15h.Thus, it is possible to significantly improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, in step (8), the temperature of the drying is 85～115 degrees Celsius, the time
For 8～15h.Thus, it is possible to significantly improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, in step (8), the temperature of the roasting is 350～750 degrees Celsius, when
Between be 5～8h.Thus, it is possible to significantly improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, in step (9), the temperature of the dipping is 15～30 degrees Celsius, the time
For 8～15h.Thus, it is possible to significantly improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, in step (9), the temperature of the drying is 85～115 degrees Celsius, the time
For 8～15h.Thus, it is possible to significantly improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
In some embodiments of the invention, in step (9), the temperature of the roasting is 350～600 degrees Celsius, when
Between be 5～8h.Thus, it is possible to significantly improve the denitration of denitration honeycomb heat accumulation body and heat storage performance.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the description with reference to accompanying drawings below to embodiment
Substantially and easy to understand, wherein：
Fig. 1 is the method flow schematic diagram for preparing denitration honeycomb heat accumulation body according to an embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
In one aspect of the invention, the present invention proposes a kind of denitration honeycomb heat accumulation body.Embodiments in accordance with the present invention,
The denitration honeycomb heat accumulation body includes：Inorganic powder, denitrating catalyst and additive.
Inventor has found that the denitration honeycomb heat accumulation body of the application has the function of denitration and accumulation of heat concurrently, and hardness is high (axially mechanical
Intensity is up to 2.5MPa), and the denitration activity of denitration honeycomb heat accumulation body may be up to 96%, while need not be separately provided heat storage and
Denitrating catalyst, can save arrangement space, cost-effective, and be acted on by the accumulation of heat of heat storage, be arranged as needed,
The catalyst stabilization in heat storage can be made to carry out denitration reaction in the range of optimal temperature, denitration efficiency is high, emission reduction effect
Significantly.
According to one embodiment of present invention, the weight portion shared by each constituent of above-mentioned denitration honeycomb heat accumulation body is not
It is particularly limited, those skilled in the art can be selected according to actual needs.According to a specific embodiment of the present invention,
Weight portion shared by each constituent of denitration honeycomb heat accumulation body can be：The inorganic powder of 50～100 weight portions；5～40 weights
The denitrating catalyst of amount part；And 1～10 weight portion additive.
According to still a further embodiment, the composition of above-mentioned inorganic powder is not particularly restricted, art technology
Personnel can be selected according to actual needs.According to a specific embodiment of the present invention, inorganic powder can include：20～
The flint clay of 50 weight portions；The cordierite of 15～40 weight portions；The Kaolin of 6～20 weight portions；And 15～30 weight portions
Quartz.
According to still another embodiment of the invention, the composition of above-mentioned denitrating catalyst is not particularly restricted, this area skill
Art personnel can be selected according to actual needs.According to a specific embodiment of the present invention, denitrating catalyst can include：
The TiO of 10～60 weight portions2-Al2O3Composite oxide carrier；The main active component of the activated carbon of 10～50 weight portions；5～20 weights
The V of amount part2O5-WO3Composite oxides Supplementary active ingredients；And 0.1～20 weight portion auxiliary agent, wherein, the auxiliary agent be ferrum
And lanthanum.
According to still another embodiment of the invention, above-mentioned TiO2-Al2O3In composite oxide carrier, Ti and Al elements rubs
You are not particularly restricted ratio, and those skilled in the art can be selected according to actual needs.A tool according to the present invention
Body embodiment, TiO2-Al2O3In composite oxide carrier, Ti can be 1 with the mol ratio of Al elements：(0.01～2).
According to still another embodiment of the invention, above-mentioned V2O5-WO3V and W elements in composite oxides Supplementary active compounds
Mol ratio be not particularly restricted, those skilled in the art can be selected according to actual needs.According to the present invention one
Individual specific embodiment, V2O5-WO3In composite oxides Supplementary active compounds, V can be 1 with the mol ratio of W elements：(0.1～5).
According to still another embodiment of the invention, in above-mentioned auxiliary agent, the quality of ferrum and lanthanum is not particularly restricted, this area
Technical staff can be selected according to actual needs.According to a specific embodiment of the present invention, the matter of ferrum and lanthanum in auxiliary agent
Amount can be separately the 0.1～10% of above-mentioned denitration honeycomb heat accumulation body gross mass.
According to still another embodiment of the invention, the composition of above-mentioned additive is not particularly restricted, people in the art
Member can be selected according to actual needs.According to a specific embodiment of the present invention, additive can include：1～10 weight
The enamel of amount part；The binding agent of 1～5 weight portion, lubricant and plasticising wetting agent.
According to still another embodiment of the invention, above-mentioned binding agent is not particularly restricted, and those skilled in the art can be with
Selected according to actual needs.According to a specific embodiment of the present invention, binding agent can be methylcellulose.
According to still another embodiment of the invention, above-mentioned lubricant and plasticising wetting agent are not particularly restricted, this area
Technical staff can be selected according to actual needs.According to a specific embodiment of the present invention, lubricant and plasticising moisturizing
Agent can be glycerol.
Specifically, the denitration honeycomb heat accumulation body of the application can be spherical, strip or honeycomb ceramics shape etc..If catalyst is ball
Shape, catalyst diameter can be 3～6mm；If catalyst is strip, can be cylindrical shape, diameter can be 3～6mm, long
Degree can be 10～60mm；If catalyst is cellular, can be cuboid, square, or circular, fan-shaped, oval
Shape etc., size can typically be 150mm × 150mm × 150mm, 250mm × 200mm × 150mm etc., aperture be generally 10mm ×
10mm, 15mm × 15mm etc., profile, size, aperture can be determined after being considered according to composite factors such as concrete operating mode, use environments.
Honeycomb ceramics shape is preferred, this is because the catalyst that the specific surface area of honeycombed catalyst compares other shapes is big, catalyst
Bigger with the contact surface of reaction medium, catalytic reaction is in hgher efficiency.When catalyst is honeycomb ceramics shape, the specific surface area of catalyst
In 320m2/m3More than, mechanical strength ＞ 8MPa, the catalysis activity of nitrogen oxides reduction may be up to 96%.
Specifically, as mixed with ferrum and lanthanum, the low temperature of catalyst can be effectively facilitated in the denitration heat storage in the application
Activity so that 150～750 DEG C of the denitration heat storage Applicable temperature scope, 200～350 DEG C of the optimal scope of application.
Thus, embodiments in accordance with the present invention, denitration honeycomb heat accumulation body proposed by the present invention at least have and have the advantage that it
One：
Embodiments in accordance with the present invention, denitration honeycomb heat accumulation body proposed by the present invention have denitration, heat accumulation function concurrently, without the need for single
Solely heat storage and denitrating catalyst are set, arrangement space can be saved, cost-effective.Made by the accumulation of heat of denitration honeycomb heat accumulation body
With being arranged as needed, the catalyst stabilization in denitration honeycomb regenerator body can be made to carry out in the range of optimal temperature
Denitration reaction, denitration efficiency are high, and emission reduction effect is notable.
Embodiments in accordance with the present invention, the denitration honeycomb heat accumulation body cause the denitration honeycomb heat accumulation body by adding enamel
Hardness be improved significantly, while significantly improving the wearability and corrosion resistance of denitration honeycomb heat accumulation body.
Embodiments in accordance with the present invention, the denitration honeycomb heat accumulation body with activated carbon as main active component, with V2O5-WO3For
Supplementary active compounds, and doping iron and lanthanum so that the denitration honeycomb heat accumulation body has higher reactivity and wide in range work
Property temperature range.
In another aspect of the invention, with reference to Fig. 1, the present invention proposes the method for preparing denitration honeycomb heat accumulation body.Root
According to embodiments of the invention, the method includes：
S100：Inorganic powder, additive and water are carried out mixer kneader refining
In the step, inorganic powder, additive and water are carried out mixer kneader refining, to obtain pug.Thus, favorably
In subsequently obtaining honeycomb ceramics stock, and the addition of additive is remarkably improved the grade of follow-up gained denitration honeycomb heat accumulation body.
According to one embodiment of present invention, the mixed proportion of inorganic powder and additive is not particularly restricted, ability
Field technique personnel can be selected according to actual needs, according to a specific embodiment of the present invention, inorganic powder and interpolation
The mass ratio of agent can be (50～100)：(1～10).
According to still a further embodiment, the composition of above-mentioned inorganic powder is not particularly restricted, art technology
Personnel can be selected according to actual needs.According to a specific embodiment of the present invention, inorganic powder can include：20～
The flint clay of 50 weight portions；The cordierite of 15～40 weight portions；The Kaolin of 6～20 weight portions；And 15～30 weight portions
Quartz.
According to still another embodiment of the invention, the composition of above-mentioned additive is not particularly restricted, people in the art
Member can be selected according to actual needs.According to a specific embodiment of the present invention, additive can include：1～10 weight
The enamel of amount part；The binding agent of 1～5 weight portion, lubricant and plasticising wetting agent.
According to still another embodiment of the invention, above-mentioned binding agent is not particularly restricted, and those skilled in the art can be with
Selected according to actual needs.According to a specific embodiment of the present invention, binding agent can be methylcellulose.
According to still another embodiment of the invention, above-mentioned lubricant and plasticising wetting agent are not particularly restricted, this area
Technical staff can be selected according to actual needs.According to a specific embodiment of the present invention, lubricant and plasticising moisturizing
Agent can be glycerol.
S200：Pug is carried out old, vacuum refining and vacuum is extruded
In the step, pug is carried out old, vacuum refining and vacuum is extruded, to obtain honeycomb ceramics stock.Inventor
It was found that, pug mix homogeneously and is reacted fully through the old inorganic powder made in pug, between additive and water three；Very
Empty refine is favorably improved the grade of honeycomb ceramics stock；And vacuum is extruded and contributes to the honeycomb ceramics stock to form honeycomb ceramics shape.
According to one embodiment of present invention, old temperature and time is not particularly restricted, those skilled in the art
Can be selected according to actual needs, according to a specific embodiment of the present invention, old temperature can be taken the photograph for 15～25
Family name's degree, time can be 24～48 hours.Thus, it is possible to significantly improve the accumulation of heat and denitration of gained denitration honeycomb heat accumulation body
Energy.
S300：Honeycomb ceramics stock is shaped, dried and is fired
In the step, honeycomb ceramics stock is shaped, dried and is fired, to obtain heat storage idiosome.Thus, can enter
One step improves the grade of denitration honeycomb heat accumulation body.
According to one embodiment of present invention, the temperature of firing is not particularly restricted, and those skilled in the art can be with root
Selected according to being actually needed, according to a specific embodiment of the present invention, the temperature of firing can be Celsius for 1200～1400
Degree.
S400：Titanium source solution, silicon source solution and ammonia are co-precipitated, and by activated carbon and containing titanium hydroxide and hydrogen
The precipitation mixture of aluminium oxide is mixed
In the step, titanium source solution, silicon source solution and ammonia are co-precipitated, to obtain containing titanium hydroxide and hydrogen
The precipitation mixture of aluminium oxide, and activated carbon is mixed with the above-mentioned precipitation mixture containing titanium hydroxide and aluminium hydroxide
Close.Inventor has found that activated carbon has very flourishing gap structure and huge specific surface area, thus with very strong absorption
Property, meanwhile, because activated carbon surface contains polynary oxygen-containing functional group, the SO in energy Preferential adsorption flue gas2And vapor, it is aoxidized
And generate H2SO4, thus, in denitrating catalyst, add activated carbon neither to affect the activity of denitrating catalyst, moreover it is possible to significantly increase
The anti-SO of denitrating catalyst2With vapour resistant poisoning performance.
According to one embodiment of present invention, in S400, the mixed liquor containing titanium source solution, silicon source solution and ammonia
PH is not particularly restricted, and those skilled in the art can be selected according to actual needs, and according to the present invention is concrete
Embodiment, the pH of the mixed liquor containing titanium source solution, silicon source solution and ammonia can be 9～11.
In the step, specifically, by titanium source solution, silicon source solution, ammonia by way of cocurrent, instill by certain flow rate
In reactor equipped with a small amount of deionized water, in the reactor, agitating device is provided with, it is ensured that solution mix homogeneously, reaction are abundant,
And titanium source solution and silicon source solution instill that speed is identical, control the instillation speed of ammonia, by the pH value control of reactant liquor 9～
Between 11, co-precipitation obtains the precipitation mixture of titanium hydroxide and aluminium hydroxide, finally by activated carbon and precipitation obtained above
Mixture mixes.
S500：Ammonium metatungstate, ammonium metavanadate reagent are dissolved in oxalic acid
In the step, ammonium metatungstate, ammonium metavanadate reagent are dissolved in oxalic acid.Inventor's discovery, by ammonium metatungstate, partially
Vanadic acid ammonium reagent is dissolved in oxalic acid and is conducive to ammonium metatungstate, ammonium metavanadate dispersed in the catalyst, so as to improve denitration
The grade of honeycomb heat accumulation body.
According to one embodiment of present invention, the pH of the mixed liquor containing ammonium metatungstate, ammonium metavanadate reagent and oxalic acid is simultaneously
It is not particularly limited, those skilled in the art can be selected according to actual needs, according to the present invention is embodied as
Example, the pH of the mixed liquor containing ammonium metatungstate, ammonium metavanadate reagent and oxalic acid can be 5～7.
S600：Iron chloride and lanthanum chloride are mixed with S500 resulting solutions
In the step, iron chloride and lanthanum chloride are mixed with S500 resulting solutions, so as to obtain containing tungsten, vanadium, ferrum,
The mixed solution of lanthanum.
S700：Impregnated in after S300 gained heat storage idiosomes are carried out acidification obtained by S400 containing activated carbon
In precipitation mixture
In the step, impregnated in after S300 gained heat storage idiosomes are carried out acidification obtained by S400 containing active
In the precipitation mixture of charcoal.
According to one embodiment of present invention, the temperature and time of dipping is not particularly restricted, those skilled in the art
Can be selected according to actual needs, according to a specific embodiment of the present invention, the temperature of dipping can be taken the photograph for 35～60
Family name's degree, time can be 8～15h.
In the step, specifically, acid activation process will be carried out after the cleaning of S300 gained heat storage idiosomes deionized water, so
Cleaning is impregnated in after draining in the precipitation mixture containing activated carbon obtained by S400 afterwards.
S800：The heat storage obtained in S700 is dried and calcination process
In the step, the heat storage obtained in S700 is dried and calcination process, thus, can be removed in the heat storage
Excessive moisture, can further improve the grade of denitration honeycomb heat accumulation body.
According to one embodiment of present invention, dry temperature and time is not particularly restricted, those skilled in the art
Can be selected according to actual needs, according to a specific embodiment of the present invention, dry temperature can be taken the photograph for 85～115
Family name's degree, time can be 8～15h.
According to still a further embodiment, the temperature and time of roasting is not particularly restricted, people in the art
Member can be selected according to actual needs, and according to a specific embodiment of the present invention, the temperature of roasting can be 350～
750 degrees Celsius, the time can be 5～8h.
In the step, specifically, the heat storage that S700 obtained takes out and blows off the remnants in its hole, then 85～
After 8～15h is dried under the conditions of 115 DEG C, weighing after 5～8h of roasting under the conditions of 350～750 DEG C.It is repeated several times, until weight is not
It is further added by.
S900：By the solid impregnating that S800 is obtained enter isopyknic containing tungsten, vanadium, ferrum, the mixed solution of lanthanum in, and enter
Row is dried and calcination process
In the step, by the solid impregnating that S800 is obtained enter isopyknic containing tungsten, vanadium, ferrum, the mixed solution of lanthanum in, and
And be dried and calcination process, to obtain denitration honeycomb heat accumulation body.
According to one embodiment of present invention, the temperature and time of dipping is not particularly restricted, those skilled in the art
Can be selected according to actual needs, according to a specific embodiment of the present invention, the temperature of dipping can be taken the photograph for 15～30
Family name's degree, time can be 8～15h.
According to still a further embodiment, dry temperature and time is not particularly restricted, people in the art
Member can be selected according to actual needs, and according to a specific embodiment of the present invention, dry temperature can be 85～115
Degree Celsius, the time can be 8～15h.
According to still another embodiment of the invention, the temperature and time of roasting is not particularly restricted, people in the art
Member can be selected according to actual needs, and according to a specific embodiment of the present invention, the temperature of roasting can be 350～
600 degrees Celsius, the time can be 5～8h.
It should be noted that titanium source solution, silicon source solution, ammonia, ammonium metatungstate, ammonium metavanadate, chlorination in preparation process
The concentration of the raw materials such as ferrum, lanthanum chloride, activated carbon or consumption are urged with meeting the denitration in final gained denitration honeycomb heat accumulation body
Agent (denitrating catalyst is 5～40 weight portions in denitration honeycomb heat accumulation body) includes：The TiO of 10～60 weight portions2-Al2O3Compound
Oxide carrier；The main active component of the activated carbon of 10～50 weight portions；The V of 5～20 weight portions2O5-WO3Composite oxides are aided in
Active component；The auxiliary agent of 0.1～20 weight portion, wherein, the auxiliary agent is ferrum and lanthanum, the TiO2-Al2O3Composite oxides are carried
In body, Ti is 1 with the mol ratio of Al elements：(0.01～2)；The V2O5-WO3V and W units in composite oxides Supplementary active compounds
The mol ratio of element is 1：(0.1～5)；In the auxiliary agent, the quality of ferrum and lanthanum is separately total for the denitration honeycomb heat accumulation body
The 0.1～10% of quality is defined.
Thus, according to the method for preparing denitration honeycomb heat accumulation body proposed by the present invention by being urged using the denitration of honeycomb ceramics shape
Agent, can cause the specific surface area of denitrating catalyst big compared to other shapes (such as spherical, cylindrical shape etc.), be conducive to increasing
Big denitrating catalyst and the contact area of reaction medium, so that improve the efficiency of denitration reaction.When denitrating catalyst is honeycomb ceramics
During shape, the specific surface area of denitrating catalyst is in 320m2/m3More than, mechanical strength is more than 2.5MPa, the catalysis of nitrogen oxides reduction
Activity may be up to 96%.Denitrating catalyst is with TiO2-Al2O3Composite oxides are carrier, with activated carbon as main active,
V2O5-WO3For Supplementary active ingredients, and rare-earth elements of lanthanum (La) is mixed as auxiliary agent, wherein, activated carbon has very flourishing
Gap structure and huge specific surface area, thus with very strong adsorptivity, meanwhile, because activated carbon surface contains polynary oxygen-containing official
Can roll into a ball, the SO in energy Preferential adsorption flue gas2And vapor, it is aoxidized and generates H2SO4, thus, add in denitrating catalyst
Activated carbon neither affects the activity of denitrating catalyst, moreover it is possible to significantly increase the anti-SO of denitrating catalyst2With vapour resistant toxic
Energy.By ferrum and lanthanum being added in denitration honeycomb heat accumulation body, can significantly improve the low temperature active of denitrating catalyst.By taking off
Denox catalyst is carried on denitration honeycomb heat accumulation body, makes denitration honeycomb heat accumulation body have the function of accumulation of heat and denitration concurrently, so as to need not
Heat storage and denitrating catalyst is separately provided, so arrangement space can be saved, cost-effective.Storage by denitration honeycomb heat accumulation body
Heat effect, is arranged as needed, and the denitrating catalyst in denitration honeycomb regenerator body can be made stable in optimal temperature model
Denitration reaction is carried out in enclosing, and denitration efficiency is high, and emission reduction effect is notable.It should be noted that above-mentioned for denitration honeycomb heat accumulation body
The method that described feature and advantage are equally applicable to the preparation denitration honeycomb heat accumulation body, here is omitted.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, and limit the present invention never in any form.
Embodiment 1
(1) by 28g flint clays, 30.4g cordierites, 7.2g Kaolin, 14.4g quartz, 2.59g enamel powder, 0.5g first
Base cellulose, the mixing of 0.91g glycerol, and add appropriate deionized water to carry out kneading refining, obtain pug standby.
(2) above-mentioned clod is carried out old, old ambient temperature is 30 DEG C, and the old time is 48h, through vacuum refining, true
Sky is extruded into the green honeycomb of required specification；
(3) green honeycomb is sent into sizing in drying machine, is dried, fire under 1200 degrees Celsius of temperature conditionss and obtain
Heat storage idiosome；
(4) 12.13g titanyl sulfates, 5.06g aluminum chloride is taken, is dissolved separately in appropriate deionized water, is stirred,
Titanium source solution and silicon source solution are obtained respectively, and the ratio of both concentration is 1：0.5.By titanium source solution, silicon source solution, ammonia by simultaneously
The mode of stream, is instilled in the reactor equipped with a small amount of deionized water by certain flow rate, is provided with agitating device in the reactor, it is ensured that
Solution mix homogeneously, reaction are fully.Titanium source solution is identical with silicon source solution instillation speed, controls the instillation speed of ammonia, will be anti-
The pH value of liquid is answered to control 10 or so, co-precipitation obtains the precipitation mixture of titanium hydroxide and aluminium hydroxide.
2.88g activated carbons are mixed with precipitation mixture obtained above, and adds deionized water to adjust the pH of mixture
Value, pH value is controlled 9 or so.
(5) the ammonium metavanadate reagent of 2.06g ammonium metatungstates, 1.90g is dissolved in appropriate oxalic acid, adjusts adding for oxalic acid
Enter amount, 6 or so, the mol ratio of vanadium tungsten is 1 to control solution ph in solution：0.5.
(6) by 1.30g iron chloride (FeCl3), 1.69g lanthanum chloride (LaCl3) be dissolved in appropriate deionized water, obtain
Iron chloride and the mixed solution of lanthanum chloride.The solution that the solution is obtained with step (5) is mixed, is obtained containing tungsten, vanadium, ferrum, lanthanum
Mixed solution；
(7) it is heavy containing activated carbon obtained by step (4) to impregnated in after above-mentioned heat storage idiosome being carried out acidification
In the mixture of shallow lake, dipping temperature is 40 degrees Celsius, after dipping 12h, heat storage idiosome is taken out and by the residual precipitate in its hole
Mixture blows clean；
(8) after the heat storage obtained in step (7) being dried 12h under 105 degrees Celsius, then under 550 degrees celsius
Weigh after roasting 5h, be repeated several times, until weight is not further added by；
(9) by the solid impregnating that step (8) is obtained enter isopyknic above-mentioned containing tungsten, vanadium, ferrum, the mixed solution of lanthanum in,
Dipping temperature is 20 degrees Celsius, after dip time 12h, dries 12h under 105 degrees Celsius, then in 550 degrees Celsius of lower roasting 8h
After obtain denitration honeycomb heat accumulation body.
The above-mentioned denitration honeycomb heat accumulation body (section is 5mm × 5mm squares) that length is 50mm is taken, is surveyed by granule strength
Determine instrument to measure the catalyst axial direction mechanical strength is 2.8MPa.Obtained denitration honeycomb heat accumulation body is commented by fixed bde catalyst
Valency device carries out activity rating, air speed 5000h-1, NH in flue gas3/ NO is 1, and controlling reaction temperature is 250～300 degrees Celsius, takes off
The denitration activity of nitre honeycomb heat accumulation body is up to 87%.
Embodiment 2
(1) by 21g flint clays, 28g cordierites, 7.7g Kaolin, 13.3g quartz, 5g enamel powder, 1g Methyl celluloses
Element, the mixing of 2g glycerol, and add appropriate deionized water to carry out kneading refining, obtain pug standby.
(2) above-mentioned clod is carried out old, old ambient temperature is 25 DEG C, and the old time is 48h, through vacuum refining, true
Sky is extruded into the green honeycomb of required specification；
(3) green honeycomb is sent into sizing in drying machine, is dried, fire under 1200 degrees Celsius of temperature conditionss and obtain
Heat storage idiosome；
(4) 10.74g titanyl sulfates, 8.96g aluminum chloride is taken, is dissolved separately in appropriate deionized water, is stirred,
Titanium source solution and silicon source solution are obtained respectively, and the ratio of both concentration is 1：1.Titanium source solution, silicon source solution, ammonia are passed through cocurrent
Mode, by certain flow rate instill equipped with a small amount of deionized water reactor in, be provided with agitating device in the reactor, it is ensured that molten
Liquid mix homogeneously, reaction are fully.Titanium source solution is identical with silicon source solution instillation speed, controls the instillation speed of ammonia, will reaction
10 or so, co-precipitation obtains the precipitation mixture of titanium hydroxide and aluminium hydroxide for the pH value control of liquid.
6.6g activated carbons are mixed with precipitation mixture obtained above, and adds deionized water to adjust the pH of mixture
Value, pH value is controlled 9 or so.
(5) the ammonium metavanadate reagent of 3.11g ammonium metatungstates, 1.43g is dissolved in appropriate oxalic acid, adjusts adding for oxalic acid
Enter amount, 7 or so, the mol ratio of vanadium tungsten is 1 to control solution ph in solution：1.
(6) by 2.23g iron chloride (FeCl3), 2.32g lanthanum chloride (LaCl3) be dissolved in appropriate deionized water, obtain
Iron chloride and the mixed solution of lanthanum chloride.The solution that the solution is obtained with step (5) is mixed, is obtained containing tungsten, vanadium, ferrum, lanthanum
Mixed solution；
(7) it is heavy containing activated carbon obtained by step (4) to impregnated in after above-mentioned heat storage idiosome being carried out acidification
In the mixture of shallow lake, dipping temperature is 40 degrees Celsius, after dipping 12h, heat storage idiosome is taken out and by the residual precipitate in its hole
Mixture blows clean；
(8) after the heat storage obtained in step (7) being dried 12h under 105 degrees Celsius, then under 500 degrees celsius
Weigh after roasting 5h, be repeated several times, until weight is not further added by；
(9) by the solid impregnating that step (8) is obtained enter isopyknic above-mentioned containing tungsten, vanadium, ferrum, the mixed solution of lanthanum in,
Dipping temperature is 20 degrees Celsius, after dip time 12h, dries 12h under 105 degrees Celsius, then in 500 degrees Celsius of lower roasting 8h
After obtain denitration honeycomb heat accumulation body.
The above-mentioned denitration honeycomb heat accumulation body (section is 5mm × 5mm squares) that length is 50mm is taken, is surveyed by granule strength
Determine instrument to measure the catalyst axial direction mechanical strength is 3.2MPa.Obtained denitration honeycomb heat accumulation body is commented by fixed bde catalyst
Valency device carries out activity rating, air speed 5000h-1, NH in flue gas3/ NO is 1, and controlling reaction temperature is 250～300 degrees Celsius, takes off
The denitration activity of nitre honeycomb heat accumulation body is up to 96%.
Embodiment 3
(1) by 17.4g flint clays, 30g cordierites, 4.2g Kaolin, 8.4g quartz, 8.16g enamel powder, 3.79g first
Base cellulose, the mixing of 3.05g glycerol, and add appropriate deionized water to carry out kneading refining, obtain pug standby.
(2) above-mentioned clod is carried out old, old ambient temperature is 30 DEG C, and the old time is 48h, through vacuum refining, true
Sky is extruded into the green honeycomb of required specification；
(3) green honeycomb is sent into sizing in drying machine, is dried, fire under 1200 degrees Celsius of temperature conditionss and obtain
Heat storage idiosome；
(4) 10.99g titanyl sulfates, 18.32g aluminum chloride is taken, is dissolved separately in appropriate deionized water, is stirred,
Titanium source solution and silicon source solution are obtained respectively, and the ratio of both concentration is 1：2.Titanium source solution, silicon source solution, ammonia are passed through cocurrent
Mode, by certain flow rate instill equipped with a small amount of deionized water reactor in, be provided with agitating device in the reactor, it is ensured that molten
Liquid mix homogeneously, reaction are fully.Titanium source solution is identical with silicon source solution instillation speed, controls the instillation speed of ammonia, will reaction
10 or so, co-precipitation obtains the precipitation mixture of titanium hydroxide and aluminium hydroxide for the pH value control of liquid.
5g activated carbons are mixed with precipitation mixture obtained above, and add deionized water to adjust the pH value of mixture,
PH value is controlled 9 or so.
(5) the ammonium metavanadate reagent of 4.35g ammonium metatungstates, 0.67g is dissolved in appropriate oxalic acid, adjusts adding for oxalic acid
Enter amount, 6 or so, the mol ratio of vanadium tungsten is 1 to control solution ph in solution：3.
(6) by 1.52g iron chloride (FeCl3), 3.39g lanthanum chloride (LaCl3) be dissolved in appropriate deionized water, obtain
Iron chloride and the mixed solution of lanthanum chloride.The solution that the solution is obtained with step (5) is mixed, is obtained containing tungsten, vanadium, ferrum, lanthanum
Mixed solution；
(7) it is heavy containing activated carbon obtained by step (4) to impregnated in after above-mentioned heat storage idiosome being carried out acidification
In the mixture of shallow lake, dipping temperature is 40 degrees Celsius, after dipping 12h, heat storage idiosome is taken out and by the residual precipitate in its hole
Mixture blows clean；
(8) after the heat storage obtained in step (7) being dried 12h under 105 degrees Celsius, then under 550 degrees celsius
Weigh after roasting 5h, be repeated several times, until weight is not further added by；
(9) by the solid impregnating that step (8) is obtained enter isopyknic above-mentioned containing tungsten, vanadium, ferrum, the mixed solution of lanthanum in,
Dipping temperature is 20 degrees Celsius, after dip time 12h, dries 12h under 105 degrees Celsius, then in 550 degrees Celsius of lower roasting 8h
After obtain denitration honeycomb heat accumulation body.
The above-mentioned denitration honeycomb heat accumulation body (section is 5mm × 5mm squares) that length is 50mm is taken, is surveyed by granule strength
Determine instrument to measure the catalyst axial direction mechanical strength is 3.8MPa.Obtained denitration honeycomb heat accumulation body is commented by fixed bde catalyst
Valency device carries out activity rating, air speed 5000h-1, NH in flue gas3/ NO is 1, and controlling reaction temperature is 250～300 degrees Celsius, takes off
The denitration activity of nitre honeycomb heat accumulation body is up to 93%.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy described with reference to the embodiment or example
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office
Combined in one or more embodiments or example in an appropriate manner.Additionally, in the case of not conflicting, the skill of this area
The feature of the different embodiments or example described in this specification and different embodiments or example can be tied by art personnel
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. a kind of denitration honeycomb heat accumulation body, it is characterised in that include：Inorganic powder, denitrating catalyst and additive.
2. denitration honeycomb heat accumulation body according to claim 1, it is characterised in that include：
The inorganic powder of 50～100 weight portions；
The denitrating catalyst of 5～40 weight portions；And
The additive of 1～10 weight portion.
3. denitration honeycomb heat accumulation body according to claim 1 and 2, it is characterised in that the inorganic powder includes：
The flint clay of 20～50 weight portions；
The cordierite of 15～40 weight portions；
The Kaolin of 6～20 weight portions；And
The quartz of 15～30 weight portions.
4. the denitration honeycomb heat accumulation body according to any one of claim 1-3, it is characterised in that the denitrating catalyst bag
Include：
The TiO of 10～60 weight portions2-Al2O3Composite oxide carrier；
The main active component of the activated carbon of 10～50 weight portions；
The V of 5～20 weight portions2O5-WO3Composite oxides Supplementary active ingredients；And
The auxiliary agent of 0.1～20 weight portion,
Wherein, the auxiliary agent is ferrum and lanthanum.
5. denitration honeycomb heat accumulation body according to claim 4, it is characterised in that the TiO2-Al2O3Composite oxides are carried
In body, Ti is 1 with the mol ratio of Al elements：(0.01～2)；
Optional, the V2O5-WO3In composite oxides Supplementary active compounds, V is 1 with the mol ratio of W elements：(0.1～5)；
Optional, in the auxiliary agent quality of ferrum and lanthanum separately for the denitration honeycomb heat accumulation body gross mass 0.1～
10%.
6. the denitration honeycomb heat accumulation body according to any one of claim 1-5, it is characterised in that the additive includes：
The enamel of 1～10 weight portion；
The binding agent of 1～5 weight portion, lubricant and plasticising wetting agent.
7. denitration honeycomb heat accumulation body according to claim 6, it is characterised in that the binding agent is methylcellulose；
Optional, the lubricant and plasticising wetting agent are glycerol.
8. a kind of method of the denitration honeycomb heat accumulation body prepared any one of claim 1-7, it is characterised in that include：
(1) inorganic powder, additive and water are carried out mixer kneader refining, to obtain pug；
(2) pug is carried out old, vacuum refining and vacuum is extruded, to obtain honeycomb ceramics stock；
(3) the honeycomb ceramics stock is shaped, dried and is fired, to obtain heat storage idiosome；
(4) titanium source solution, silicon source solution and ammonia are co-precipitated, heavy containing titanium hydroxide and aluminium hydroxide to obtain
Shallow lake mixture, and activated carbon is mixed with the precipitation mixture containing titanium hydroxide and aluminium hydroxide；
(5) ammonium metatungstate, ammonium metavanadate reagent are dissolved in oxalic acid；
(6) iron chloride and lanthanum chloride are mixed with step (5) resulting solution, so as to obtain containing tungsten, vanadium, ferrum, lanthanum mixed
Close solution；
(7) impregnated in the precipitation containing activated carbon obtained by step (4) to mix after the heat storage idiosome being carried out acidification
In compound；
(8) heat storage obtained in step (7) is dried and calcination process；
(9) by the solid impregnating that step (8) is obtained enter isopyknic described containing tungsten, vanadium, ferrum, the mixed solution of lanthanum in, and
It is dried and calcination process, to obtain denitration honeycomb heat accumulation body.
9. method according to claim 8, it is characterised in that in step (2), the old temperature is taken the photograph for 15～25
Family name's degree, time are 24～48 hours；
Optional, in step (3), the temperature of the firing is 1200～1400 degrees Celsius；
Optional, in step (4), the pH of the mixed liquor containing titanium source solution, silicon source solution and ammonia is 9～11；
Optional, in step (5), the pH of the mixed liquor containing ammonium metatungstate, ammonium metavanadate reagent and oxalic acid is 5～7.
10. method according to claim 8 or claim 9, it is characterised in that in step (7), the temperature of the dipping is 35～
60 degrees Celsius, the time is 8～15h；
Optional, in step (8), the temperature of the drying is 85～115 degrees Celsius, and the time is 8～15h；
Optional, in step (8), the temperature of the roasting is 350～750 degrees Celsius, and the time is 5～8h；
Optional, in step (9), the temperature of the dipping is 15～30 degrees Celsius, and the time is 8～15h；
Optional, in step (9), the temperature of the drying is 85～115 degrees Celsius, and the time is 8～15h；
Optional, in step (9), the temperature of the roasting is 350～600 degrees Celsius, and the time is 5～8h.
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| CN107694558A (en) * | 2017-09-30 | 2018-02-16 | 湖北神雾热能技术有限公司 | A kind of SCR catalyst for having denitration heat accumulation function concurrently and preparation method thereof |
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