CN106731555A - Industrial kiln gas accumulation of heat denitrification apparatus and method of denitration - Google Patents
Industrial kiln gas accumulation of heat denitrification apparatus and method of denitration Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
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Abstract
The invention discloses industrial kiln gas accumulation of heat denitrification apparatus and method of denitration, wherein industrial kiln gas accumulation of heat denitrification apparatus include：First heat storage unit, is provided with high-temperature thermal storage body in first heat storage unit, the top of first heat storage unit has the first opening；Second heat storage unit, Pen An areas and denitration heat-accumulating area are followed successively by from the bottom to top in second heat storage unit, reductant nozzle is provided with the Pen An areas, denitration heat storage is provided with the denitration heat-accumulating area, the top of second heat storage unit has the second opening, and the second heat storage unit bottom is connected with the bottom of first heat storage unit.With flue gas denitrification system be integrated in one Regenerative Combustion System by the industrial kiln gas accumulation of heat denitrification apparatus, and the denitration process to flue gas are thus realized while Mist heat recovering, and the industrial kiln gas accumulation of heat denitrification apparatus have accumulation of heat and denitration dual-use function.
Description
Technical field
The invention belongs to qi exhaustion nitre energy-conserving and environment-protective field, specifically, the present invention relates to industrial kiln gas accumulation of heat denitration dress
Put and method of denitration.
Background technology
With developing rapidly for China's economy, the fossil fuel equal energy source such as natural gas, oil and coal obtains more extensive
Using so that environmental problem is increasingly serious, therefore causes a series of environmental problems, such as acid rain, depletion of the ozone layer, greenhouse effects
Deng so that our living environment is further severe.Energy resource structure of the China based on coal determine China nitrogen oxides and
Sulfur oxide emission is constantly in high situation, the discharge of a large amount of pollution gas so that environmental problem is increasingly tight
It is high, the production and living of our people are not only had a strong impact on, and be unfavorable for the sustainable development of China's economy.Therefore, environment is asked
Topic has obtained national increasing concern.
The NO of mankind's activity dischargeXMore than 90% comes from fuel combustion process.It is various industrial furnaces, Civil energy-saving cooking stove, motor-driven
During high temperature combustion of fuel in car and other internal combustion engines, the nitrogen substance oxidation generation NO in fuelX, in the air of participation burning
N2And O2Also NO can be generatedX.From the point of view of energy resource structure, during the primary energy and power generation energy resource of China are constituted, coal is occupied definitely
Leading position.And the coal of China more than 80% is directly burning, particularly for power station, Industrial Boiler and civil boiler
In.Therefore, in considerably long period, the NO 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.
Denitrating flue gas belong to burning post-processing technology, and the smoke evacuation system of many developed countries all needs to install denitrating flue gas dress
Put.Denitration method for flue gas is more, but obtains the only selective catalytic reduction and selectivity of a large amount of commercial Applications at present and non-urge
Change reducing process, other method is in experimental study stage or pilot scale stage at present.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, of the invention
One purpose is to propose industrial kiln gas accumulation of heat denitrification apparatus, and the industrial kiln gas accumulation of heat denitrification apparatus are by Regenerative Combustion System
It is integrated in one with flue gas denitrification system, the denitration process to flue gas, the storage is thus realized while Mist heat recovering
Industrial kiln gas accumulation of heat denitrification apparatus have accumulation of heat and denitration dual-use function.
According to an aspect of the present invention, the present invention proposes industrial kiln gas accumulation of heat denitrification apparatus, including：
First heat storage unit, is provided with high-temperature thermal storage body in first heat storage unit, the top of first heat storage unit has
First opening；
Pen An areas and denitration heat-accumulating area, the spray ammonia are followed successively by from the bottom to top in second heat storage unit, second heat storage unit
Reductant nozzle is provided with area, denitration heat storage, the top tool of second heat storage unit are provided with the denitration heat-accumulating area
There is the second opening, the second heat storage unit bottom is connected with the bottom of first heat storage unit.
By the industrial kiln gas accumulation of heat denitrification apparatus using the above embodiment of the present invention, high-temperature flue gas are opened by first first
Mouth enters in the first heat storage unit, enters in the second heat storage unit after high-temperature thermal storage body carries out accumulation of heat, and flue gas is in the second heat storage unit
Reductant nozzle, denitration heat storage are inside sequentially passed through, the reducing agent for being sprayed into reductant nozzle first is mixed, then by de-
There is denitration reaction in the accumulation of heat of nitre heat storage, finally discharged by the second opening simultaneously.
Industry kiln gas accumulation of heat denitrification apparatus of the invention are using collection accumulation of heat and the novel denitration accumulation of heat of denitration function integration
Body, its surface is smooth, wear-resisting, denitration heat storage long service life, adapts to 600 DEG C or so flue gases of higher temperature and enters described de-
Nitre heat storage, flue gas can carry out denitration reaction without depth dedusting, and good stability, light-off temperature is low, have at 180 DEG C preferably
Denitration efficiency, denitration efficiency is high, reduces and denitration heat storage usage amount, denitration low cost are commonly used in current industry field.Secondly,
The high-temperature flue gas for producing that burn enter accumulation of heat denitration region after high-temperature thermal storage body is reclaimed and is cooled to 300 DEG C~700 DEG C, cancel low
Intermediate temperature regenerator body, using denitration heat storage, the further accumulation of heat of flue gas completes denitration reaction while cooling, right after removing nitrogen oxides
Outer discharge, energy-efficient, environmental protection, system compact.In addition, flue gas enters denitration heat storage, completed in denitration heat storage into one
Step is lowered the temperature and is sufficiently mixed, until denitration catalyst reaction is completed, eliminating conventional denitrating system need to set ammonia-spraying grid etc
Device.
In addition, industrial kiln gas accumulation of heat denitrification apparatus according to the above embodiment of the present invention can also have what is added as follows
Technical characteristic：
In some embodiments of the invention, multiple denitration heat storages are provided with the denitration heat-accumulating area, it is described out of stock
Heat-accumulating area includes center and external zones, and the denitration accumulation of heat volume density arranged in the center is more than arrangement in the external zones
Denitration accumulation of heat volume density.
In some embodiments of the invention, the denitration heat storage of the center is into multiple rows of many column distributions.
In some embodiments of the invention, the center is rectangular area, and the external zones is described for rectangular box-like
External zones is set around the center.
In some embodiments of the invention, the denitration heat storage of the external zones is divided into multi-turn, and denitration described in multi-turn
Heat storage is from inside to outside nested successively to be set.
In some embodiments of the invention, multiple denitration heat storages of each circle are circumferentially spaced arrangement.
In some embodiments of the invention, the denitration heat storage of any one circle encloses denitration heat storage in institute with adjacent one
State circumferential upper interlaced arrangement.
In some embodiments of the invention, the reducing agent spray includes multiple, and the reductant nozzle is atomizer.
In some embodiments of the invention, the atomizer is ammonia atomization nozzle or urea atomizer.
According to the second aspect of the invention, the invention allows for a kind of industrial kiln gas accumulation of heat of utilization preceding embodiment
The method of the industrial kiln gas of denitrification apparatus treatment, including：
Make industrial kiln gas into the first cooling is carried out by high-temperature thermal storage body in the first heat storage unit, to obtain low temperature cigarette
Gas；
Make low-temperature flue gas enter the reducing agent sprayed into reductant nozzle in the second heat storage unit to mix, to obtain mixing cigarette
Gas；
Make the mixed flue gas carry out second by denitration heat storage to lower the temperature and be catalyzed the low-temperature mixed flue gas generation also
Original reaction, so that flue gas is discharged after obtaining denitration.
In some embodiments of the invention, the denitration heat storage includes ceramic honeycomb thermal accumulator body and the load ceramics
Out of stock catalyst on honeycomb heat accumulation body, the out of stock catalyst includes tungsten zirconium mixed oxide and precious metals pt,
Wherein, the load capacity of the tungsten zirconium mixed oxide is 5-30 weight %, and the load capacity of precious metals pt is 0.01-
2.0 weight %.
Wherein, the ceramic honeycomb thermal accumulator body is made up of inorganic powder and additive, and the inorganic powder includes 20-30 weights
Measure flint clay, the corundum of 3-8 weight %, the aluminum oxide of 1-5 weight %, the kaolin of 8-12 weight %, the 15-20 weight % of %
Feldspar, 10-20 weight % quartz and 10-15 weight % cordierite,
Tungsten and the mol ratio of zirconium are (0.5~5) in the tungsten zirconium mixed oxide:1.
Brief description of the drawings
Fig. 1 is the structural representation of industrial kiln gas accumulation of heat denitrification apparatus according to an embodiment of the invention.
Fig. 2 is the structural representation of industrial kiln gas accumulation of heat denitrification apparatus according to an embodiment of the invention.
Fig. 3 is that the structure of denitration heat-accumulating area in industrial kiln gas accumulation of heat denitrification apparatus according to an embodiment of the invention is shown
It is intended to.
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
It is exemplary to scheme the embodiment of description, it is intended to for explaining the present invention, and be not considered as limiting the invention.
According to an aspect of the present invention, the present invention proposes industrial kiln gas accumulation of heat denitrification apparatus, as shown in figure 1, this
The industrial kiln gas accumulation of heat denitrification apparatus of inventive embodiments include：First heat storage unit 10 and the second heat storage unit 20, wherein, first stores
High-temperature thermal storage body 11 is provided with hot portion 10, the top of first heat storage unit 20 has the first opening 12；Second heat storage unit 20
Pen An areas and denitration heat-accumulating area being inside followed successively by from the bottom to top, reductant nozzle 21 being provided with the Pen An areas, the denitration stores
Denitration heat storage 22 is provided with hot-zone, the top of second heat storage unit 20 has the second opening 23, second heat storage unit
20 bottoms are connected with the bottom of first heat storage unit 10.
By the industrial kiln gas accumulation of heat denitrification apparatus using the above embodiment of the present invention, high-temperature flue gas are opened by first first
Mouthfuls 12 enter in the first heat storage units 10, enter in the second heat storage unit 20 after high-temperature thermal storage body 11 carries out accumulation of heat, and flue gas is the
Reductant nozzle 21, denitration heat storage 22, the reducing agent for being sprayed into reductant nozzle 21 first are sequentially passed through in two heat storage units 20
Mixed, then denitration reaction is occurred simultaneously by the accumulation of heat of denitration heat storage 22, finally discharged by the second opening 24.
Industry kiln gas accumulation of heat denitrification apparatus of the invention are using collection accumulation of heat and the novel denitration accumulation of heat of denitration function integration
Body, its surface is smooth, wear-resisting, denitration heat storage long service life, adapts to 600 DEG C or so flue gases of higher temperature and enters described de-
Nitre heat storage, flue gas can carry out denitration reaction without depth dedusting, and good stability, light-off temperature is low, have at 180 DEG C preferably
Denitration efficiency, denitration efficiency is high, reduces and denitration heat storage usage amount, denitration low cost are commonly used in current industry field.Secondly,
The high-temperature flue gas for producing that burn enter accumulation of heat denitration region after high-temperature thermal storage body is reclaimed and is cooled to 300 DEG C~700 DEG C, cancel low
Intermediate temperature regenerator body, using denitration heat storage, the further accumulation of heat of flue gas completes denitration reaction while cooling, right after removing nitrogen oxides
Outer discharge, energy-efficient, environmental protection, system compact.In addition, flue gas enters denitration heat storage, completed in denitration heat storage into one
Step is lowered the temperature and is sufficiently mixed, until denitration catalyst reaction is completed, eliminating conventional denitrating system need to set ammonia-spraying grid etc
Device.
Embodiments in accordance with the present invention, are provided with multiple denitration heat storages, the out of stock heat-accumulating area bag in denitration heat-accumulating area
Center and external zones are included, the denitration accumulation of heat volume density arranged in the center stores more than the denitration of arrangement in the external zones
Hot volume density.Inventor has found, is arranged in out of stock heat-accumulating area in the manner described above by by multiple denitration heat storages, also
Former agent consumption equal conditions, denitration efficiency is optimal.
Embodiments in accordance with the present invention, as described in Figure 3, the denitration heat storage of the center is into multiple rows of many column distributions.Institute
Center is stated for rectangular area, the external zones is rectangular box-like, and the external zones is set around the center, the periphery
The denitration heat storage in area is divided into multi-turn, and the from inside to outside nested setting successively of denitration heat storage described in multi-turn.The multiple of each circle
Denitration heat storage is circumferentially spaced arrangement.Thus, inventor has found that, using above-mentioned arrangement, denitration heat storage is distributed
More rule, it is possible thereby to so that flue gas occurs uniform denitration reaction.Simultaneously using above-mentioned special denitration heat storage arrangement
Mode, it is ensured that denitration cost is reduced while removal of nitrogen oxide rate.
Inventor has found, by the exhaust gas volumn of center more than external zones, thus by the denitration heat storage of center in tight
Close multiple rows of many column distributions, external zones is set around the center, and its arrangement density is less than center, it is possible thereby to so that logical
A small amount of flue gas of a large amount of flue gases and external zones of crossing center can reach equal denitration dynamics, and then improve denitration efficiency
And denitration effect.
According to a particular embodiment of the invention, in denitration heat-accumulating area denitration heat storage 22 is mainly using with denitration function
Denitration heat storage 221 and common heat storage 222 arrange that is, band denitration work(is all installed in denitration region center according to Fig. 3 modes
The denitration heat storage of energy；Denitration heat storage of the periphery with denitration function is fitted into common heat storage interval, and denitration stores
Hot body surface face is coated with metal ion.
According to a particular embodiment of the invention, as shown in figure 3, the arrangement section of the denitration heat storage in denitration region is with 9 × 9
As a example by block, the heat storage of denitration function, four rows of periphery, the four equal arranged for interval of row are all arranged in center 5 × 5.By engineering
Experimental verification, the arrangement that the present invention is used, in reducing agent consumption equal conditions, denitration efficiency is better than other arrangements.
Embodiments in accordance with the present invention, the denitration heat storage of any one circle is with an adjacent circle denitration heat storage in the week
Upward interlaced arrangement.It is possible thereby to so that flue gas obtains equably denitration process.
According to a particular embodiment of the invention, reductant nozzle includes multiple, and reductant nozzle is atomizer.Thus adopt
Effervescent atomization technology is used, using high pressure air as atomizing medium, the moment atomization for spraying reducing agent is small droplet, mist
Drop particle can reach less than 40 μm, can be good at being well mixed with flue gas.
According to a particular embodiment of the invention, atomizer is ammonia atomization nozzle or urea atomizer.Thus to
Ammoniacal liquor or urea are sprayed into flue gas as reducing agent.The oxide or metal alkaline chemical combination in flue gas can effectively be reduced
Thing.According to a particular embodiment of the invention, when atomizer is urea atomizer, i.e., using urea as reducing agent, need
Reducing agent spray is most arranged in the first heat storage unit and positioned at high-temperature thermal storage body downstream.Urea liquid need steam as atomization and
Transport medium.Thus former agent spray is most arranged in the first heat storage unit and positioned at high-temperature thermal storage body downstream, can be by High Temperature Gas
To urea liquid heating atomization, atomizer need to use the parameter shadows such as exotic material, and Nozzle angle, aperture to body sensible heat
Ring atomizing effect.
Industrial furnace directly heats mode for gas fuel combustion, and raw material is to process low through coal-based direct reduction rotary hearth furnace in stove
The metallized pellet of the pressing such as grade iron ore powder and carbon, binding agent, industrial furnace running temperature is 1600 DEG C.Gas fires
Material is burnt by being arranged on the spout of body of heater side wall and spraying into stove, material melted by heating and slag sluicing system is carried out in stove, by slag
Iron or other metallic elements control below 2%.Carbon residue in material generates CO after further being reacted with metallized pellet, protects
Industrial furnace inside reducing atmosphere is demonstrate,proved, flowing through regenerative apparatus together with the flue gas of gas fuel combustion generation carries out fume afterheat
Reclaim and discharged out of the furnace with after removal of nitrogen oxide treatment.
Illustrated by taking side industry kiln gas accumulation of heat denitrification apparatus as an example, the burner hearth internal high temperature flue gas is from industrial furnace
On side wall arrange spout out, after the high-temperature thermal storage body, after temperature is reduced to 700 DEG C~800 DEG C from 1500 DEG C or so
Enter the denitration heat storage under conditions of the reducing agent spout sprays into reducing agent, complete the heavy of uniform mixing and dust
Drop, flue-gas temperature enters denitration heat storage at 600 DEG C or so, due to using novel denitration heat storage, adapts to flue gas higher temperatures
Degree enters the denitration heat storage, and further reduce temperature carries out denitration reaction for 420 DEG C or so to catalyst activity temperature province,
Enter flue through reversal valve through the exhanst gas outlet after removing denitrification, temperature is arranged outward less than 150 DEG C.The reducing agent
Sprayed by reductant nozzle, after mixing through the flue gas after high-temperature thermal storage body recovery waste heat, together into denitration heat storage simultaneously
Complete uniform mixing in the denitration heat storage with denitrating catalyst, and dust sedimentation, there is reduction reaction, remove nitrogen
Oxide, removal efficiency is up to more than 90%.Using novel denitration heat storage, reducing commonly used in current industry field denitration storage
Hot body usage amount, reduces denitration cost, and anti-clogging, Corrosion Protection obtain larger raising.
According to a particular embodiment of the invention, in the bottom of the first heat storage unit 10, the lower section positioned at high-temperature thermal storage body 11 sets
Decanting zone is equipped with, is slowed down in the region flue gas flow rate, the dust natural subsidence in flue gas is got off, subsequently into Pen An areas and denitration
Outer row after heat-accumulating area removing nitrogen oxides.According to a particular embodiment of the invention, decanting zone is additionally provided with flue gas blowback system, through de-
Partial fume after nitre treatment is returned, and purging ash disposal treatment is regularly carried out to decanting zone, can moderately be lowered into denitration accumulation of heat
The dust content in area.Meanwhile, the CO also having in the flue gas is favourable to Catalytic Decomposition of Nitric Oxide reaction, can well improve de-
The reactivity of denox catalyst.
According to the second aspect of the invention, the present invention is proposed and filled using the industrial kiln gas accumulation of heat denitration of preceding embodiment
The method for putting the industrial kiln gas for the treatment of.Including：Make industrial kiln gas into carrying out by high-temperature thermal storage body in the first heat storage unit
One cooling, to obtain low-temperature flue gas；Make low-temperature flue gas enter the reducing agent sprayed into reductant nozzle in the second heat storage unit to mix
Close, to obtain mixed flue gas；Make the mixed flue gas by denitration heat storage carry out second lower the temperature and be catalyzed the low temperature mix
Close flue gas and reduction reaction occurs, so that flue gas is discharged after obtaining denitration.
The method of the industrial kiln gas for the treatment of of the embodiment of the present invention is taken off using collection accumulation of heat and the new of denitration function integration
Nitre heat storage, its surface is smooth, wear-resisting, denitration heat storage long service life, adapts to 600 DEG C or so flue gases of higher temperature and enters
The denitration heat storage, flue gas can carry out denitration reaction without depth dedusting, and good stability, light-off temperature is low, has at 180 DEG C
Preferable denitration efficiency, denitration efficiency is high, reduces and denitration heat storage usage amount, denitration cost are commonly used in current industry field
It is low.Secondly, the high-temperature flue gas for producing that burn enter accumulation of heat denitration after high-temperature thermal storage body is reclaimed and is cooled to 300 DEG C~700 DEG C
Area, cancels low-temperature heat accumulating body, and using denitration heat storage, the further accumulation of heat of flue gas completes denitration reaction while cooling, removes nitrogen
Externally discharged after oxide, energy-efficient, environmental protection, system compact.In addition, flue gas enters denitration heat storage, in denitration heat storage
Interior completion is further lowered the temperature and is sufficiently mixed, until denitration catalyst reaction is completed, eliminating conventional denitrating system need to set spray ammonia
The device of grid etc.
According to a particular embodiment of the invention, denitration heat storage includes ceramic honeycomb thermal accumulator body and the load ceramic honeycomb
Out of stock catalyst on heat storage, the out of stock catalyst includes tungsten zirconium mixed oxide and precious metals pt, wherein, the tungsten zirconium
The load capacity of composite oxides is 5-30 weight %, and the load capacity of precious metals pt is 0.01-2.0 weight %.Wherein, the ceramics
Honeycomb heat accumulation body is made up of inorganic powder and additive, flint clay of the inorganic powder comprising 20-30 weight %, 3-8 weights
Measure corundum, the aluminum oxide of 1-5 weight %, the kaolin of 8-12 weight %, the feldspar of 15-20 weight %, the 10-20 weight % of %
Quartz and 10-15 weight % cordierite, the mol ratio of tungsten and zirconium is (0.5~5) in the tungsten zirconium mixed oxide:1.
Embodiments in accordance with the present invention, denitration heat storage can be spherical, strip or honeycomb ceramics shape etc..If denitration heat storage
For spherical, denitration heat storage diameter can be 3~6mm；If denitration heat storage is strip, denitration heat storage is cylindrical shape,
Diameter can be 3~6mm, and length can be 10~60mm；Can be cuboid, square if denitration heat storage is for cellular,
Can also for circle, sector, ellipse etc., size typically can be 150mm × 150mm × 150mm or 250mm × 200mm ×
150mm etc., on denitration heat storage the section of through hole for square, size be 10mm × 10mm, 15mm × 15mm or 20mm ×
20mm, or hole section is circle, then aperture is 10mm, 15mm or 20mm.Profile, size, aperture can according to specific operating mode, make
Determine after being considered with composite factors such as environment.Honeycomb ceramics shape is preferred, because the specific surface area phase of honeycombed catalyst
Catalyst compared with other shapes is big, and catalyst is bigger with the contact surface of reaction medium, and catalytic reaction is in hgher efficiency.When catalyst is
During honeycomb ceramics shape, the specific surface area of catalyst is in 500m2/m3More than, mechanical strength ＞ 8MPa, the removal efficiency of nitrogen oxides is reachable
More than 90%.
Embodiments in accordance with the present invention, the horizontal section of the Faveolate denitration heat storage with denitration function is square, and size is
150mm × 150mm × 200mm, through hole is the square of 20mm × 20mm from section on denitration heat storage.Due to from industrial furnace
Contain a large amount of dust, but the present invention in high-temperature flue gas out according to the type of furnace is applicable, creatively will be de- in denitration heat-accumulating area
Intensive centered on the design of nitre heat storage arrangement, periphery is sparse, high-temperature dust-containing flue gas first natural subsidence from the first heat storage unit,
Subsequently into denitration heat storage, the part dust in flue gas can be settled, it is to avoid high-temperature region heat storage is blocked.And the present invention is adopted
It is the denitration heat storage that metal ion is coated with surface, its channel inner surface is smooth, wear-resisting, with good anti-stifled, anti-
Corrosive nature, cellular heat storage and arrangement with denitration function from above-mentioned size can reach good denitration effect
Really, denitration low cost.
Industrial furnace uses heat storage type combustion mode, by thing in the heat stove of generation during gas fuel combustion
Material, the gaseous fuel and/or air for participating in burning is heated by the hold over system after recovery high-temperature flue gas waste heat respectively, can be by gas
Fuel and/or air are preheated to more than 1000 DEG C, 1500 DEG C or so of industrial furnace running temperature respectively.The flue gas is main by burning
During produce CO2, the CO compositions that are thermally generated of the carbon during nitrogen oxides and material melting, be also accompanied by thing in stove
The a large amount of dust produced in material course of reaction.The flue gas enters de- after the hold over system being arranged at nozzle reclaims heat
Nitre system, nitrogen oxides in flue gas reacts in the presence of denitrating catalyst with reducing agent, or with flue gas in reproducibility
Gas CO reaction generations N2, reach the removing nitrogen oxides i.e. purpose of denitrating flue gas.
The industrial furnace material is black, the coloured or nonmetallic pellet, 700 processed through coal-based direct reduction rotary hearth furnace
The metallized pellet (DRI) of DEG C hot charging or cold charge, therefore, can be accompanied by while material is heated generation reduction reaction substantial amounts of
Dust is produced.
Industrial kiln gas accumulation of heat denitrification apparatus according to the above embodiment of the present invention and method of denitration at least have following excellent
One of point：
(1) novel denitration heat storage is used, surface is smooth, wear-resisting, and denitration heat storage long service life adapts to higher temperatures
600 DEG C or so flue gases of degree enter denitration heat storage, and flue gas can carry out denitration reaction without depth dedusting, and good stability rises and lives
Temperature is low, has preferable denitration efficiency at 180 DEG C, and denitration efficiency is high, reduces and denitration heat storage is commonly used in current industry field
Usage amount, denitration low cost；
(2) high-temperature flue gas that burning is produced take after accumulation of heat is reclaimed and is cooled to 300 DEG C~700 DEG C into accumulation of heat denitration,
Cancel low-temperature heat accumulating body, using denitration heat storage, the further accumulation of heat of flue gas completes denitration reaction while cooling, removes nitrogen oxidation
Externally discharged after thing, energy-efficient, environmental protection, system compact；
(3) flue gas enters denitration heat storage, completes further to lower the temperature and be sufficiently mixed in denitration heat storage, until denitration
Catalytic reaction is completed, and eliminating conventional denitrating system need to set the device of ammonia-spraying grid etc；
(4) special denitration heat storage arrangement, it is ensured that denitration cost is reduced while removal of nitrogen oxide rate.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, must rather than the device or element for indicating or imply meaning
With specific orientation, with specific azimuth configuration and operation, therefore must be not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In the description of the invention, " multiple " is meant that two or more,
Unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be that machinery connects
Connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or two interaction relationships of element.For the ordinary skill in the art, can be according to specific feelings
Condition understands above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be with
It is the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention or example.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 any
Combined in an appropriate manner in individual or multiple embodiments or example.Additionally, in the case of not conflicting, the technology of this area
Can be combined for the feature of the different embodiments or example described in this specification and different embodiments or example by personnel
And combination.
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 industrial kiln gas accumulation of heat denitrification apparatus, it is characterised in that including：
First heat storage unit, is provided with high-temperature thermal storage body in first heat storage unit, the top of first heat storage unit has first
Opening；
Pen An areas and denitration heat-accumulating area are followed successively by from the bottom to top in second heat storage unit, second heat storage unit, in the Pen An areas
Reductant nozzle is provided with, denitration heat storage is provided with the denitration heat-accumulating area, the top of second heat storage unit has the
Two openings, the second heat storage unit bottom is connected with the bottom of first heat storage unit.
2. industrial kiln gas accumulation of heat denitrification apparatus according to claim 1, it is characterised in that set in the denitration heat-accumulating area
Multiple denitration heat storages are equipped with, the out of stock heat-accumulating area includes center and external zones, and the denitration arranged in the center stores
Denitration accumulation of heat volume density of the hot volume density more than arrangement in the external zones.
3. industrial kiln gas accumulation of heat denitrification apparatus according to claim 2, it is characterised in that the denitration of the center stores
Hot body is into multiple rows of many column distributions.
4. industrial kiln gas accumulation of heat denitrification apparatus according to claim 3, it is characterised in that the center is rectangle region
Domain, the external zones is rectangular box-like, and the external zones is set around the center,
Optionally, the denitration heat storage of the external zones is divided into multi-turn, and denitration heat storage is from inside to outside embedding successively described in multi-turn
Set is set.
5. industrial kiln gas accumulation of heat denitrification apparatus according to claim 4, it is characterised in that multiple denitrations of each circle store
Hot body is circumferentially spaced arrangement.
6. industrial kiln gas accumulation of heat denitrification apparatus according to claim 5, it is characterised in that the denitration accumulation of heat of any one circle
Body encloses denitration heat storage interlaced arrangement in the circumferential direction with adjacent one.
7. industrial kiln gas accumulation of heat denitrification apparatus according to claim 1, it is characterised in that the reducing agent spray includes many
Individual, the reductant nozzle is atomizer.
8. industrial kiln gas accumulation of heat denitrification apparatus according to claim 7, it is characterised in that the atomizer is ammoniacal liquor
Atomizer or urea atomizer.
9. the method that industrial kiln gas accumulation of heat denitrification apparatus described in a kind of utilization right any one of 1-8 process industrial kiln gas, its
It is characterised by, including：
Make industrial kiln gas into the first cooling is carried out by high-temperature thermal storage body in the first heat storage unit, to obtain low-temperature flue gas；
Make low-temperature flue gas enter the reducing agent sprayed into reductant nozzle in the second heat storage unit to mix, to obtain mixed flue gas；
Make the mixed flue gas carry out second by denitration heat storage to lower the temperature and be catalyzed the low-temperature mixed flue gas generation reduction instead
Should, so that flue gas is discharged after obtaining denitration.
10. industrial kiln gas accumulation of heat denitrification apparatus according to claim 9, it is characterised in that the denitration heat storage bag
The out of stock catalyst on ceramic honeycomb thermal accumulator body and the load ceramic honeycomb thermal accumulator body is included, the out of stock catalyst includes tungsten zirconium
Composite oxides and precious metals pt
Wherein, the load capacity of the tungsten zirconium mixed oxide is 5-30 weight %, and the load capacity of precious metals pt is 0.01-2.0 weights
Amount %.
Wherein, the ceramic honeycomb thermal accumulator body is made up of inorganic powder and additive, and the inorganic powder includes 20-30 weight %
Flint clay, the corundum of 3-8 weight %, the aluminum oxide of 1-5 weight %, the kaolin of 8-12 weight %, the length of 15-20 weight %
The quartz and the cordierite of 10-15 weight % of stone, 10-20 weight %,
Tungsten and the mol ratio of zirconium are (0.5~5) in the tungsten zirconium mixed oxide:1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611219476.XA CN106731555A (en) | 2016-12-26 | 2016-12-26 | Industrial kiln gas accumulation of heat denitrification apparatus and method of denitration |
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|---|---|---|---|
| CN201611219476.XA CN106731555A (en) | 2016-12-26 | 2016-12-26 | Industrial kiln gas accumulation of heat denitrification apparatus and method of denitration |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131671A (en) * | 2018-02-13 | 2018-06-08 | 项玮 | Denitration heat-accumulating burner used for industrial furnace |
| CN109260947A (en) * | 2018-11-26 | 2019-01-25 | 河北科技大学 | A kind of recuperative heater flue gas denitrification system of two-stage accumulation of heat |
| CN110385037A (en) * | 2019-07-19 | 2019-10-29 | 浙江百能科技有限公司 | One kind being suitable for high concentrate dust, high-temperature fluctuates flue gas SCR denitration device and method |
-
2016
- 2016-12-26 CN CN201611219476.XA patent/CN106731555A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131671A (en) * | 2018-02-13 | 2018-06-08 | 项玮 | Denitration heat-accumulating burner used for industrial furnace |
| CN109260947A (en) * | 2018-11-26 | 2019-01-25 | 河北科技大学 | A kind of recuperative heater flue gas denitrification system of two-stage accumulation of heat |
| CN110385037A (en) * | 2019-07-19 | 2019-10-29 | 浙江百能科技有限公司 | One kind being suitable for high concentrate dust, high-temperature fluctuates flue gas SCR denitration device and method |
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