CN206404556U - The system of rotary hearth furnace flue gas accumulation of heat denitration - Google Patents

The system of rotary hearth furnace flue gas accumulation of heat denitration Download PDF

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Publication number
CN206404556U
CN206404556U CN201621440653.2U CN201621440653U CN206404556U CN 206404556 U CN206404556 U CN 206404556U CN 201621440653 U CN201621440653 U CN 201621440653U CN 206404556 U CN206404556 U CN 206404556U
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heat
denitration
flue gas
accumulation
hearth furnace
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宋敏洁
郭科宏
杨玉地
石为华
钟贵全
吴道洪
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Shenwu Technology Group Corp Co Ltd
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Shenwu Technology Group Corp Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency

Abstract

The utility model discloses the system of rotary hearth furnace flue gas accumulation of heat denitration.The system of the rotary hearth furnace flue gas accumulation of heat denitration includes:Accumulation of heat denitrification apparatus, three-way diverter valve and dust arrester, wherein, accumulation of heat denitrification apparatus sets gradually heat-accumulating area, reducing agent spraying zone and denitration region along flow of flue gas direction.The high-temperature flue gas that rotary hearth furnace is produced, after the heat-accumulating area recovery waste heat for first passing through accumulation of heat denitrification apparatus, again denitration process is carried out through denitration region, energy-efficient, environmental protection, and the surface of the denitration heat storage of denitration region use is smooth, wear-resisting, and flue gas can carry out denitration reaction without depth dedusting, denitration efficiency is high, also, accumulation of heat again can be also carried out while denitration, the heat of high-temperature flue gas is fully reclaimed.Flue gas removing dust device after accumulation of heat denitration can be discharged directly.

Description

The system of rotary hearth furnace flue gas accumulation of heat denitration
Technical field
The system that the utility model is related to rotary hearth furnace flue gas accumulation of heat 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, participate in burning air in 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% directly burns, 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 the important topic that atmospheric environment is administered.
Denitrating flue gas belongs 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.Thus, the system and method for denitrating flue gas have It is to be modified.
Utility model content
The utility model is intended at least solve one of technical problem present in prior art.Therefore, of the present utility model One purpose is to carry out denitration again after proposing a kind of system of rotary hearth furnace flue gas accumulation of heat denitration, the abundant recovery waste heat of high-temperature flue gas Regeneration treatment, energy-efficient, environmental protection, and accumulation of heat and denitration efficiency are high.
According to one side of the present utility model, what the utility model provided a kind of rotary hearth furnace flue gas accumulation of heat denitration is System.According to embodiment of the present utility model, the system includes:
Accumulation of heat denitrification apparatus, the accumulation of heat denitrification apparatus sets gradually heat-accumulating area, reducing agent along flow of flue gas direction and sprayed Area and denitration region, wherein, the heat-accumulating area has the air outlet slit after smoke inlet and preheating, the smoke inlet and rotary hearth furnace Exhaust opening be connected, the air outlet slit after the preheating is connected with the nozzle of rotary hearth furnace, and the heat-accumulating area is provided with heat storage, institute State reducing agent spraying zone and be provided with reductant nozzle, the denitration region has the first gas port, and is provided with denitration heat storage, and institute State a diameter of 3-6mm of denitration heat storage;
Three-way diverter valve, the three-way diverter valve has air intake, the second gas port and exhanst gas outlet, second gas port It is connected with the first gas port with the denitration region;
Dust arrester, the dust arrester has gas access and purified gas outlet, the gas access and institute Exhanst gas outlet is stated to be connected.
The high-temperature flue gas produced according to the system of the rotary hearth furnace flue gas accumulation of heat denitration of the utility model embodiment, rotary hearth furnace, After the heat-accumulating area recovery waste heat for first passing through accumulation of heat denitrification apparatus, then through denitration region carry out denitration process, energy-efficient, environmental protection, and And the surface of the denitration heat storage of denitration region use is smooth, wear-resisting, flue gas can carry out denitration reaction, denitration without depth dedusting Efficiency high, also, accumulation of heat again can be also carried out while denitration, fully reclaim the heat of high-temperature flue gas.After accumulation of heat denitration Flue gas removing dust device can be discharged directly.
Optionally, the reductant nozzle is atomizer.
Optionally, the denitration heat storage is spherical, strip or honeycomb ceramics shape, it is preferable that be honeycomb ceramics shape, more preferably Ground, is cellular cuboid.
Optionally, the honeycomb aperture of the Faveolate denitration heat storage is not less than 10mm.Preferably, the Faveolate denitration The honeycomb aperture of heat storage is not less than 15mm.
Optionally, the specification of the cellular cuboid is (150-250) mm × (150-250) mm × (150-250) mm. Preferably, the specification of the cellular cuboid is 250mm × 200mm × 150mm.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will from description of the accompanying drawings below to embodiment is combined Become substantially and be readily appreciated that, wherein:
Fig. 1 shows the structural representation of the system of the rotary hearth furnace flue gas accumulation of heat denitration according to the utility model one embodiment Figure;
Fig. 2 shows the system according to the foregoing rotary hearth furnace flue gas accumulation of heat denitration of the utilization of the utility model one embodiment Handle the schematic flow sheet of the method for flue gas.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model Limitation.
In description of the present utility model, term " longitudinal direction ", " transverse direction ", " on ", " under ", "front", "rear", "left", "right", The orientation or position relationship of the instruction such as " vertical ", " level ", " top ", " bottom " be based on orientation shown in the drawings or position relationship, It is for only for ease of description the utility model rather than requires that the utility model must be with specific azimuth configuration and operation, therefore It is not intended that to limitation of the present utility model.
It should be noted that term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying phase To importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be with Express or implicitly include one or more this feature.Further, in description of the present utility model, unless otherwise Illustrate, " multiple " are meant that two or more.
According to one side of the present utility model, what the utility model provided a kind of rotary hearth furnace flue gas accumulation of heat denitration is System.With reference to Fig. 1, according to embodiment of the present utility model, the system to the rotary hearth furnace flue gas accumulation of heat denitration is explained, should System includes:Accumulation of heat denitrification apparatus 100, three-way diverter valve 200 and dust arrester 300.In order to make it easy to understand, below to each device Illustrated one by one:
Accumulation of heat denitrification apparatus 100:According to embodiment of the present utility model, the accumulation of heat denitrification apparatus 100 is along flow of flue gas side To setting gradually heat-accumulating area 110, reducing agent spraying zone 120 and denitration region 130, wherein, heat-accumulating area 110 has smoke inlet and pre- Air outlet slit after heat, smoke inlet is connected with the exhaust opening of rotary hearth furnace, the nozzle phase of the air outlet slit after preheating and rotary hearth furnace Even, heat-accumulating area 110 is provided with heat storage, and the flue gas of rotary hearth furnace discharge enters heat-accumulating area and carries out accumulation of heat recovery heat through heat storage, Flue gas after being cooled;Reducing agent spraying zone 120 is provided with reductant nozzle 121, and the flue gas after cooling sprays into reducing agent Area 120 is drenched, reducing agent is sprayed into using reductant nozzle 121, the flue gas after cooling is mixed with reducing agent, obtain mixed flue gas; Denitration region 130 has the first gas port, and is provided with denitration heat storage, and a diameter of 3-6mm of the denitration heat storage, mixed flue gas Into denitration region 130, accumulation of heat reduction denitration process is carried out through denitration heat storage, the flue gas of the removing nitrogen oxides cooled down. After the high-temperature flue gas that rotary hearth furnace is produced, the heat-accumulating area recovery waste heat for first passing through accumulation of heat denitrification apparatus, then through denitration region progress denitration The surface for the denitration heat storage that processing, energy-efficient, environmental protection, and denitration region are used is smooth, wear-resisting, and flue gas is without depth dedusting Denitration reaction can be carried out, denitration efficiency is high, also, accumulation of heat again can be also carried out while denitration, fully reclaims high-temperature flue gas Heat.According to embodiment of the present utility model, nitrogen oxides in effluent removal efficiency is up to more than 98%.
, wherein it is desired to which explanation, the diameter of denitration heat storage refers to the minimum circle for covering denitrating catalyst cross section Radius.
According to embodiment of the present utility model, the shape of denitrating catalyst can be selected according to needs of production, According to some embodiments of the present utility model, denitrating catalyst can be in spherical, strip or honeycomb ceramics shape.If catalyst is ball Shape, catalyst diameter can be 3~6mm;If catalyst is strip or cylindrical shape, diameter can be 3~6mm, and length can Think 10~60mm;If catalyst is cellular, cross section can be cuboid, square etc., and size typically can be 150mm ×150mm×150mm、250mm×200mm×150mm.According to some embodiments of the present utility model, cellular cuboid Specification can be (150-250) mm × (150-250) mm × (150-250) mm.According to preferred embodiment of the present utility model, honeybee The specification of nest shape cuboid can be 250mm × 200mm × 150mm.
Profile, size and the aperture of denitration heat storage are true after being considered according to composite factors such as specific operating mode, use environments It is fixed.Due to containing dust from the high-temperature flue gas that rotary hearth furnace comes out, therefore, the hole that the denitration accumulation of heat honeycomb ceramics selected herein is used Footpath can not be too small.According to embodiment of the present utility model, the honeycomb aperture of Faveolate denitration heat storage is not less than 10mm.According to this The preferred embodiment of utility model, the honeycomb aperture of Faveolate denitration heat storage is not less than 15mm.Thus, the aperture of heat storage is not Easily block, it is ensured that flue gas is passed through.In addition, the utility model embodiment uses the denitration heat storage added with enamel, its table Face is smooth, wear-resisting, with good anti-clogging, from above-mentioned size accumulation of heat denitration honeycomb ceramics with regard to good denitration can be reached Effect.
According to embodiment of the present utility model, reductant nozzle is atomizer.Because atomizer uses effervescent atomization Technology, using high pressure air as atomizing medium, it is small droplet to make the moment atomization that reducing agent sprays, and droplet particle is reachable To less than 40 μm, it can be good at being well mixed with flue gas.
According to embodiment of the present utility model, the temperature of the flue gas after cooling is 300-600 degrees Celsius.Thus, heat-accumulating area The heat of high-temperature flue gas is fully reclaimed.
Three-way diverter valve 200:According to embodiment of the present utility model, the three-way diverter valve 200 has air intake, second Gas port and exhanst gas outlet, wherein, the second gas port and it is connected with the first gas port of denitration region 130, the removing nitrogen oxides of cooling Flue gas enters dust arrester through three-way diverter valve and carries out purified treatment, the flue gas after being purified, and is drawn using air-introduced machine After emptying, the valve direction of the three-way diverter valve is converted, air is filled through the three-way diverter valve into the accumulation of heat denitration Carry out the pre-heat treatment is put, the air after being preheated, the air after the preheating is burnt for rotary hearth furnace.Three-way diverter valve leads to Periodic transformation's valve direction is crossed, accumulation of heat denitration and the preheating of air of flue gas is realized.
Dust arrester 300:According to embodiment of the present utility model, the dust arrester 300 has after gas access and purification Gas vent, wherein, gas access is connected with exhanst gas outlet.Thus, the flue gas removing dust device after accumulation of heat denitration can be straight Run in and put.
For the ease of understanding the system of foregoing rotary hearth furnace flue gas accumulation of heat denitration, provide a kind of turn bottom using foregoing herein The method that the system of kiln gas accumulation of heat denitration handles flue gas.With reference to Fig. 2, according to embodiment of the present utility model, this method includes:
S100 accumulation of heat denitrations
According to embodiment of the present utility model, the flue gas that rotary hearth furnace is discharged is delivered to accumulation of heat denitrification apparatus, sequentially entered Heat-accumulating area carries out accumulation of heat through heat storage and reclaims heat, so as to the flue gas after being cooled;The flue gas after the cooling is set to enter also Former agent spraying zone, sprays into reducing agent using reductant nozzle, the flue gas after the cooling is mixed with reducing agent, to be mixed Close flue gas;The mixed flue gas is entered denitration region, accumulation of heat reduction denitration process is carried out through denitration heat storage, to be cooled down Removing nitrogen oxides flue gas.Thus, reclaim the high-temperature flue gas that rotary hearth furnace is produced, the heat-accumulating area for first passing through accumulation of heat denitrification apparatus After waste heat, then through denitration region progress denitration process, energy-efficient, environmental protection, and the surface of the denitration heat storage of denitration region use Smooth, wear-resisting, flue gas can carry out denitration reaction without depth dedusting, and denitration efficiency is high, also, can also be carried out while denitration Accumulation of heat again.According to embodiment of the present utility model, nitrogen oxides in effluent removal efficiency is up to more than 98%.
According to embodiment of the present utility model, rotary hearth furnace material is the pressing such as iron ore powder and carbon, binding agent Bead, therefore, can be produced while material heated generation reduction reaction with substantial amounts of dust.
According to embodiment of the present utility model, denitration heat storage includes:Heat storage matrix and loading mixture, wherein, store Hot body matrix includes inorganic powder;Loading mixture is supported on heat storage matrix, and the loading mixture includes:Denitrating catalyst And additive, wherein, additive contains enamel.Thus, the surface of the denitration heat storage is smooth, wear-resisting, and flue gas is removed without depth Dirt can carry out denitration reaction, and denitration efficiency is high.
According to embodiment of the present utility model, inorganic powder includes flint clay, cordierite, kaolin and quartz.
According to embodiment of the present utility model, the carrier of denitrating catalyst is titania-alumina composite oxides, living Property composition include activated carbon, Supplementary active ingredients include vanadic anhydride-tungstic acid composite oxides, auxiliary agent comprising iron and Lanthanum.Thus, the surface of the denitration heat storage is smooth, wear-resisting, and flue gas can carry out denitration reaction, denitration efficiency without depth dedusting It is high.
According to embodiment of the present utility model, the mass ratio of inorganic powder, denitrating catalyst and additive is (50-100): (5-40):(1-10).Thus, the surface of the denitration heat storage is smooth, wear-resisting, and it is anti-that flue gas can carry out denitration without depth dedusting Should, denitration efficiency is high.
For the ease of understanding the denitration heat storage of the utility model embodiment, the preparation side of the denitration heat storage is provided herein Method, is specifically included:
(1) refining of heat storage idiosome
By appropriate inorganic powder, ceramic powders, binding agent, plasticising NMF, mix lubricant, and add appropriate go Ionized water carries out kneading refining, obtains pug standby.
Clod is carried out it is old, old environment temperature be 15~25 DEG C, the old time be 24h~48h, through vacuum refining, The green honeycomb of specification needed for vacuum is extruded into.
Again by green honeycomb be re-fed into drying machine shape, dry, fired under the conditions of 1200 DEG C~1400 DEG C into Product.
(2)TiO2-Al2O3The preparation of composite oxides
A certain amount of titanyl sulfate and aluminium chloride are taken, is dissolved separately in appropriate deionized water, stirs, make respectively Titanium source and silicon source solution are obtained, the ratio between both concentration are 1:(0.01~2).Titanium source solution, silicon source solution, ammoniacal liquor are passed through into cocurrent Mode, is instilled in the reactor equipped with a small amount of deionized water by certain flow rate, agitating device is provided with the reactor, it is ensured that solution Well mixed, reaction is abundant.Titanium source solution is identical with silicon source solution instillation speed, the instillation speed of ammoniacal liquor is controlled, by reaction solution PH value control between 9~11, co-precipitation obtains the precipitation mixture of titanium hydroxide and aluminium hydroxide.
Activated carbon is mixed with precipitation mixture obtained above, and adds the pH value that deionized water adjusts mixture, will PH value is controlled 9 or so.
(3) configuration of mixed liquor
A certain amount of ammonium metatungstate, ammonium metavanadate reagent are dissolved in appropriate oxalic acid, the addition of oxalic acid, control is adjusted Solution pH value processed is between 5~7, and the mol ratio of vanadium tungsten is 1 in solution:(0.1~5).
By a certain amount of iron chloride (FeCl3), lanthanum chloride (LaCl3) be dissolved in appropriate deionized water, obtain iron chloride With the mixed solution of lanthanum chloride.The solution is mixed with solution obtained above, the mixed solution of tungstenic, vanadium, iron, lanthanum is obtained.
(4) main active component load
Acid-wash activation processing is carried out after the honeycomb wares obtained in step (1) are cleaned with deionized water, cleaning is drained It is impregnated in afterwards after the precipitation mixture obtained in step (2), 35~60 DEG C of dipping temperature, 8~15h of dip time, by honeycomb ceramics Take out and blow off the remnants in its hole, after then drying 8~15h under the conditions of 85~115 DEG C, under the conditions of 350~750 DEG C Weighed after 5~8h of roasting.It is repeated several times, until weight is not further added by.
(5) Supplementary active compounds and auxiliary agent load
The solid that step (4) is obtained is immersed in the mixed solution that step (3) isometric therewith is obtained, dipping temperature 15 ~30 DEG C, after 8~15h of dip time, after drying 8~15h under the conditions of 85~115 DEG C, 5 are calcined under the conditions of 350~600 DEG C Final product is obtained after~8h.
According to embodiment of the present utility model, reducing agent is sprayed into using atomizer, reducing agent atomizing particle is formed.Due to Atomizer uses effervescent atomization technology, using high pressure air as atomizing medium, the moment atomization for spraying reducing agent For small droplet, it is well mixed with flue gas.Droplet particle can reach less than 40 μm, can be good at being well mixed with flue gas.
According to embodiment of the present utility model, reducing agent is ammoniacal liquor or urea.Thus, the reaction of reducing agent and nitrogen oxides Activity is good, and reduction denitration efficiency is high, fully the nitrogen oxides in removing flue gas.
According to embodiment of the present utility model, the temperature of the flue gas after cooling is 300-600 degrees Celsius.Thus, heat-accumulating area The heat of high-temperature flue gas is fully reclaimed.
S200 purified treatments
According to embodiment of the present utility model, the flue gas of the removing nitrogen oxides of cooling is filled through three-way diverter valve into dedusting Put carry out purified treatment, the flue gas after being purified.
S300 the pre-heat treatments
According to embodiment of the present utility model, the valve direction of three-way diverter valve is converted, air is entered through three-way diverter valve Enter accumulation of heat denitrification apparatus and carry out the pre-heat treatment, the air after being preheated, the air after preheating is burnt for rotary hearth furnace.
According to embodiment of the present utility model, the temperature of the air after preheating is 900-1100 degrees Celsius.Thus, after preheating Air and preheating after combustion gas burnt in rotary hearth furnace consumed less energy consumption, high combustion efficiency.
Below with reference to specific embodiment, the utility model is illustrated, it is necessary to which explanation is, these embodiments are only It is illustrative, and it is not intended that to limitation of the present utility model.
Embodiment 1
Using the utility model embodiment rotary hearth furnace flue gas accumulation of heat denitration system to the flue gas of direct reduction iron making stove Handled, wherein, direct reduction iron making stove is that to directly heat raw material in mode, stove be iron ore of low ore grade to gas fuel combustion The bead of the pressing such as powder and carbon, binding agent, running temperature is 1200 DEG C.Gaseous fuel is by being arranged on body of heater side wall Burner, which is sprayed into stove, to burn, and material is heated in stove occurs direct reduction reactor, obtains the reduced iron of iron content rate 90%.In material Carbon discharges out of the furnace with generating CO after iron ore reaction together with the flue gas that gas fuel combustion is produced.
The high-temperature flue gas is come out from rotary hearth furnace, after hold over system recovery waste heat, and temperature, which is reduced to enter after 450 DEG C, to be stored Thermal denitration system, while heat is reclaimed in further accumulation of heat, completion denitration reaction goes to denitrogenate oxygen in the presence of denitrating catalyst Externally discharged after compound.The reducing agent is sprayed from flue by reductant nozzle, and the nozzle is atomizer, using bubble mist Change technology, reaches less than 40 μm for particle diameter by reducing agent atomization, can uniformly be mixed with the flue gas after accumulation of heat.Mix the part The configured denitrating catalyst at flue rear of gas is closed, occurs reduction reaction, nitrogen oxides is removed, removal efficiency is reachable 98%.
The specific proportioning of the denitration heat storage is as follows:On the basis of heat storage total quality, the mass loading of inorganic powder Measure as 60%, the mass loading amount of denitrating catalyst is 25%, the mass loading amount of additive (including enamel) is 15%.Its In, the active component activated carbon of denitrating catalyst accounts for 20%, V of catalyst weight2O5-WO3The 18% of catalyst weight is accounted for, is added Plus agent enamel accounts for the 55% of weight of additive.
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 the spy that the embodiment or example are described Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term State and be not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be Combined in an appropriate manner in any one or more embodiments or example.
While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that: These embodiments can be carried out with a variety of changes, modification in the case where not departing from principle of the present utility model and objective, replaced And modification, scope of the present utility model limits by claim and its equivalent.

Claims (9)

1. a kind of system of rotary hearth furnace flue gas accumulation of heat denitration, it is characterised in that including:
Accumulation of heat denitrification apparatus, the accumulation of heat denitrification apparatus along flow of flue gas direction set gradually heat-accumulating area, reducing agent spraying zone and Denitration region, wherein, the heat-accumulating area has the air outlet slit after smoke inlet and preheating, the row of the smoke inlet and rotary hearth furnace Mouth is connected, and the air outlet slit after the preheating is connected with the nozzle of rotary hearth furnace, and the heat-accumulating area is provided with heat storage, described to go back Former agent spraying zone is provided with reductant nozzle, and the denitration region has the first gas port, and is provided with denitration heat storage, and described de- A diameter of 3-6mm of nitre heat storage;
Three-way diverter valve, the three-way diverter valve has air intake, the second gas port and an exhanst gas outlet, second gas port and with First gas port of the denitration region is connected;And
Dust arrester, the dust arrester has gas access and purified gas outlet, the gas access and the cigarette Gas outlet is connected.
2. the system of rotary hearth furnace flue gas accumulation of heat denitration according to claim 1, it is characterised in that the reductant nozzle is Atomizer.
3. the system of rotary hearth furnace flue gas accumulation of heat denitration according to claim 1, it is characterised in that the denitration heat storage is Spherical, strip or honeycomb ceramics shape.
4. the system of rotary hearth furnace flue gas accumulation of heat denitration according to claim 3, it is characterised in that the denitration heat storage is Honeycomb ceramics shape.
5. the system of rotary hearth furnace flue gas accumulation of heat denitration according to claim 4, it is characterised in that the denitration heat storage is Cellular cuboid.
6. the system of rotary hearth furnace flue gas accumulation of heat denitration according to claim 4, it is characterised in that the Faveolate denitration stores The honeycomb aperture of hot body is not less than 10mm.
7. the system of rotary hearth furnace flue gas accumulation of heat denitration according to claim 6, it is characterised in that the Faveolate denitration stores The honeycomb aperture of hot body is not less than 15mm.
8. the system of rotary hearth furnace flue gas accumulation of heat denitration according to claim 5, it is characterised in that the cellular cuboid Specification be (150-250) mm × (150-250) mm × (150-250) mm.
9. the system of rotary hearth furnace flue gas accumulation of heat denitration according to claim 8, it is characterised in that the cellular cuboid Specification be 250mm × 200mm × 150mm.
CN201621440653.2U 2016-12-26 2016-12-26 The system of rotary hearth furnace flue gas accumulation of heat denitration Active CN206404556U (en)

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