CN105927327A - High-temperature tail gas heat recovery energy-saving device - Google Patents

High-temperature tail gas heat recovery energy-saving device Download PDF

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Publication number
CN105927327A
CN105927327A CN201610380510.5A CN201610380510A CN105927327A CN 105927327 A CN105927327 A CN 105927327A CN 201610380510 A CN201610380510 A CN 201610380510A CN 105927327 A CN105927327 A CN 105927327A
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temperature
metallic carrier
catalyst
catalytic
carrier
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吴本刚
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/90—Injecting reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8628—Processes characterised by a specific catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8631—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/24—Chromium, molybdenum or tungsten
    • B01J23/30—Tungsten
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
    • B01J27/053—Sulfates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0215—Coating
    • B01J37/0217—Pretreatment of the substrate before coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0215—Coating
    • B01J37/0225—Coating of metal substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/024—Multiple impregnation or coating
    • B01J37/0244—Coatings comprising several layers

Abstract

The invention relates to a high-temperature tail gas heat recovery energy-saving device. The device comprises a tail gas treatment part. The tail gas treatment part comprises a control unit, a reducing agent supply unit, a catalytic reduction unit, a particulate trapping unit and a temperature sensor. The catalytic reduction unit is connected with the particulate trapping unit through a communicating pipeline. A bypass is arranged on the communicating pipeline and connected with the reducing agent supply unit. The control unit controls the particulate trapping unit, the reducing agent supply unit, the catalytic reduction unit and the temperature sensor. The catalytic reduction unit comprises a plurality of cylindrical catalytic restorers capable of rotating around a rotary shaft. A plurality of catalytic reduction channels are arranged in each catalytic restorer at intervals in the length direction of the catalytic restorer. The catalytic reduction channels include the high-temperature catalytic reduction channels, the medium-temperature catalytic reduction channels and the low-temperature catalytic reduction channels. A movable pressure reduction buffer structure is arranged between every two catalytic restorers. The high-temperature tail gas heat recovery energy-saving device converts different catalysts to treat waste gas according to the temperatures of waste gas, so that the catalytic efficiency is maximized.

Description

The heat-recovering energy-saving device of high-temperature tail gas
Technical field
The present invention relates to field of Environment Protection, particularly relate to the heat-recovering energy-saving device of high-temperature tail gas.
Background technology
In correlation technique, Industrial Boiler in use can produce a large amount of high-temperature tail gas, if the most treated just by these high temperature Tail gas is discharged, the ecological environment of meeting heavy damage periphery, causes environmental pollution.Existing tail gas heat dissipation device general cost is the highest, The most most medium-sized and small enterprises are in order to cost-effective, typically all without going to install.Along with the rising of energy prices, giving up of tail gas Hanker containing a large amount of heat energy, directly dispose and the most more waste.But after having installed waste-heat recovery device additional, the tail of original use Flash Gas Compression Skid System makes treatment effeciency decline because of the change of exhaust temperature.
Summary of the invention
For the problems referred to above, present invention aim to address after installing waste-heat recovery device additional the exhaust gas processing device of original use because of The technical problem that treatment effeciency declines is made for the change of exhaust temperature.
For solving above-mentioned technical problem, the technical solution used in the present invention is the heat-recovering energy-saving device of high-temperature tail gas, including tail Gas disposal part, described vent gas treatment part includes control unit, reducing agent feeding unit, catalytic reduction unit, micro particle catching Unit and temperature sensor, described catalytic reduction unit is connected by connecting pipe with described micro particle catching unit, and described connection Pipeline is provided with branch road and connects described reducing agent feeding unit.Described control unit controls micro particle catching unit respectively, reducing agent supplies Answer unit, catalytic reduction unit and temperature sensor.Described catalytic reduction unit air inlet one end is located in described temperature sensor.
Described catalytic reduction unit includes rotary shaft, air inlet pipe and the exhaustor of connection air inlet pipe.Described rotary shaft along air inlet pipe, The direction, axis of exhaustor extends across air inlet pipe and exhaustor, and the two ends of described rotary shaft connect motor, described motor Rotary shaft can be driven to rotate.Multiple cylindrical catalysis restorer that can rotate it is arranged in sequence with around rotary shaft in described rotary shaft, The inside of described catalysis restorer is interval with multiple catalysis reduction passage along its length, and described recall reduction passage is divided into height Temperature catalysis reduction passage, middle temperature catalysis reduction passage and low-temperature catalyzed reduction passage.Arrange in described high-temperature catalytic reduction passage There is spiral helicine high-temperature catalytic metallic carrier, in described middle temperature catalysis reduction passage, be provided with spiral helicine middle temperature catalytic metal support, It is provided with spiral helicine low-temperature catalyzed metallic carrier in described low-temperature catalyzed reduction passage.Described high-temperature catalytic reduction passage, middle temperature Catalysis reduction passage and the arrangement of low-temperature catalyzed reduction passage regularity.
Being additionally provided with opening and closing disc in described catalysis restorer, described opening and closing disc is positioned at one end of catalysis reduction channel inlet.Described opening and closing The surface of dish is provided with the through hole of regular arrangement, rotary opening closing dish, the high-temperature catalytic reduction on described through-hole alignment catalysis restorer Passage, middle temperature catalysis reduction passage or low-temperature catalyzed reduction passage, cover remaining two kinds catalysis reduction passages, and waste gas passes through through hole Enter this catalysis reduction passage and carry out the catalytic reduction reaction of correspondence.
One end of described catalysis restorer air inlet is provided with movable pressure-reducing cushioning structure, and described pressure-reducing cushioning structure is the circle of hollow Cylindricality or discoid, the outer surface of described pressure-reducing cushioning structure is interval with multiple opening, each opening is inserted with mobilizable every Catch, when opening and closing disc needs to rotate when, described barrier sheet enters pressure-reducing cushioning structure and is formed in pressure-reducing cushioning inside configuration Waste gas interception structure, waste gas need to could enter posterior catalysis restorer through the cavity of multiple adjacent barrier sheets composition, thus temporarily Time property reduces exhaust gas pressure so that posterior opening and closing disc can be with smooth rotation, it is to avoid exhaust gas leakage occurs.Posterior opening and closing disc is complete Becoming after rotating, described barrier sheet detaches, and waste gas recovers original pressure, is rapidly introduced into posterior catalysis reduction passage.
When burning under the influence of various factors, the temperature of waste gas discharge is different, and different catalyst optimal processing temperature is different, Therefore arrange three kinds of different catalyst of operating temperature to reduce in passage in catalysis, cooperate with opening and closing disc, work as temperature sensor After EGT being detected, according to its temperature, rotary opening closing dish so that the through-hole alignment in opening and closing disc adapts to this temperature range Catalysis reduction passage, covers remaining two kinds catalysis reduction passages, and waste gas is by catalysis maximized with the efficiency that its temperature matches Reduction passage, thus realize the maximization of exhaust treatment efficiency and effect.
Described high-temperature catalytic metallic carrier works under 400～600 DEG C of environment, and described middle temperature catalytic metal support is at 250～400 DEG C of rings Working under border, described low-temperature catalyzed metallic carrier works under 150～250 DEG C of environment.
Described high-temperature catalytic metallic carrier includes being loaded with WO3/TiO2The metallic carrier of catalyst, WO3/TiO2Under catalyst passes through Row step is carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: ammonia Water: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula half Footpath is 2.25 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metal carrier surface, Making the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, wherein microetch hole is total Area accounts for the 60% of the metal carrier surface gross area；(3) the metallic carrier roasting 5h in 900 DEG C after step (2) processes, Its surface is made to form oxide-film；(4) use sol-gel process at the surface-coated glass ceramic coating of described metallic carrier, composition For mol ratio SiO2: Al2O3=5:1；(5) butyl titanate, acetic acid and ethanol 1:8:5 in molar ratio stirring is obtained solution A, Ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B, solution B is quantitatively adding in A, is stirred vigorously and obtains 25wt.%WO3/TiO2 Catalyst colloidal sol, is immersed in 25wt.%WO by the metallic carrier of coating glass ceramic coating3/TiO230min in catalyst colloidal sol, Then slowly lifting out, dry at room temperature over night is placed in baking oven and dries at 60 DEG C, and at 500 DEG C, roasting 5h, obtains Load 25wt.%WO3WO3/TiO2The high-temperature catalytic metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more WO3/TiO2Catalyst.When the microetch hole gross area accounts for the 60% of the metal carrier surface gross area, Under 400～600 DEG C of environment, through laser ablation high-temperature catalytic metallic carrier compared to not through laser ablation high-temperature catalytic gold The catalytic efficiency belonging to carrier improves 35%.
At a temperature of 400～550 DEG C, the catalysis activity with temperature of high-temperature catalytic metallic carrier raises and strengthens, and conversion rate of NOx is above 80%, more than 92% when 500 DEG C, when temperature is higher than occurring downward trend after 500 DEG C, but NOx still has 65% turn when 600 DEG C Rate.
Described middle temperature catalytic metal support includes being loaded with CeO2/W25The metallic carrier of Ti catalyst, CeO2/W25Ti catalyst leads to Cross the following step to be carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: Ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula Radius is 2.25 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metallic carrier table Face so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, forms microetch hole, wherein microetch The hole gross area accounts for the 60% of the metal carrier surface gross area；(3) gold after cleaning of the metallic carrier after step (2) processes Belong to carrier roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at the table of described metallic carrier Topcoating covers glass ceramic coating, and composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and ethanol by mole Obtaining solution A than 1:8:5 stirring, ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B；(6) solution B is quantitatively adding in A, Being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting 4h at 600 DEG C, Obtain WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Ce (NO3)3·6H2O is dissolved in water and obtains nitre Acid cerium solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and is born after 1h is stirred at room temperature Carry the CeO of 10wt.%Ce2/W25Ti catalyst colloidal sol, is immersed in CeO by the metallic carrier of coating glass ceramic coating2/W25Ti 1h in catalyst colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, then at 500 DEG C Lower roasting 5h, obtains being loaded with CeO2/W25The middle temperature catalytic metal support of Ti catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more CeO2/W25Ti catalyst.When the microetch hole gross area accounts for the 60% of the metal carrier surface gross area, Under 250～400 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 30%.
At a temperature of 250～300 DEG C, the catalysis activity with temperature of middle temperature catalytic metal support raises and strengthens, and conversion rate of NOx is the highest In 60%, at a temperature of 250～300 DEG C, conversion rate of NOx reaches the highest, and close to 80%, after temperature is higher than 400 DEG C, middle temperature is urged The catalysis activity changing metallic carrier reduces rapidly.
Described low-temperature catalyzed metallic carrier includes being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst, Cr2O3-SO4 2-/TiO2Urge Agent is carried on metallic carrier through the following steps: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution becomes It is divided into water: ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilize wavelength for 532nm, pulse width be 500ps～50ns, Laser facula radius is 2.25 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after gold Belong to carrier surface so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, Wherein the microetch hole gross area accounts for the 60% of the metal carrier surface gross area；(3) metallic carrier after step (2) processes is in by clear Metallic carrier after washing is roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at described metal The surface-coated glass ceramic coating of carrier, composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and second Alcohol 1:8:5 in molar ratio stirring obtains solution A, and ammonium paratungstate is dissolved in the sulfuric acid solution of 70% and obtains solution B, and solution B is fixed Amount adds in A, and wherein sulfate radical is SO with the mol ratio of titanium dioxide4 2-: TiO2=1:4；(6) solution B is quantitatively adding A In, it being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting at 600 DEG C 4h, obtains WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Cr (NO3)3·9H2O is dissolved in water and obtains To chromium nitrate solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and obtains after 1h is stirred at room temperature To Cr2O3-SO4 2-/TiO2Catalyst colloidal sol, is immersed in Cr by the metallic carrier of coating glass ceramic coating2O3-SO4 2-/TiO2Catalyst 1h in colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, roasts at 500 DEG C Burn 5h, obtain being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more Cr2O3-SO4 2-/TiO2Catalyst.When the microetch hole gross area accounts for the 60% of the metal carrier surface gross area, Under 150～250 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 32%.
Load 10wt.%Ce low-temperature catalyzed metallic carrier when 150～250 DEG C, conversion rate of NOx along with temperature increase and by Edge up height, close to 100%.In 175～250 DEG C of temperature ranges, conversion rate of NOx is all more than 80%.
Compared to using single catalyst, the NOx ratio discharge used after the catalytic conversion system of the present invention in waste gas from 12.192g/kW h drops to 2.579g/kW h, and treatment effect significantly promotes.
Described micro particle catching unit includes housing and polylith micro particle catching metallic carrier, and described micro particle catching metallic carrier is through following Step process: take quantitative chromic nitrate, cobalt nitrate and citric acid and be dissolved in deionized water, wherein chromium ion and citric acid molecule mole Ratio is 1:1.5, and chromium ion concentration is 0.2mol/L.It is applied in after 80 DEG C of complex reaction 5h on micro particle catching metallic carrier, Described micro particle catching metallic carrier obtains final products after 600 DEG C of roasting 5h.In order to carry high catalytic activity further, in catalysis Agent surface has supported and has accounted for the precious metals pt that catalyst quality mark is 0.5%.Described final products mutually overlap after cutting into elongate Forming metal gauze, described metal gauze is vertically connected with the metal wire mesh filter forming intensive porous.
Described housing includes that shell body and inner housing, described shell body interval wrap up described inner housing so that shell body and inner housing Between form vacuum layer, keep the temperature of metal wire mesh filter, promote its passive combustive regeneration, reduce in particle trapper Exhaust back pressure.Described inner housing is divided into expansion, filtration fraction and constriction, and described expansion connects air inlet pipe, institute Stating constriction and connect exhaustor, the external diameter of the constriction of wherein said inner housing is 2.5～4 with exhaustor external diameter diameter ratio, institute The angle stating inner housing expansion is 80 °～100 °.
In particle trapper, the uniformity of flow velocity and particle concentration determines the height of particle trapper inner filtration body utilization rate, filtration Body regeneration period and the length in filtering bodies service life, in the actual application of particle trapper, the exhaust parameter of particle trapper (exhaust entrance speed) and structural parameters (angle of flare, diameter ratio) are to velocity flow profile and the uniformity of particle concentration distributions There is very important impact.
In the case of inlet flow rate (inlet velocity and inlet-duct area) is identical, when diameter flows through expansion than little inner housing, Speed reduces less, and the eddy current effect of generation is less, almost without, but, less diameter ratio can make particle trapper Interior exhaust flow rate is higher, exhaust flow rate skewness, thus the collection of particles in particle trapper during causing actual filtration At the central axis of metal wire mesh filter, increase the weight of the load at metal wire mesh filter central axis.When diameter ratio is 2～4 Time, the VELOCITY DISTRIBUTION in each cross section of particle trapper is more uniform, thus in metal wire mesh filter, particle deposition distribution is the most uniform. Now in the case of same charge flow rate, particle trapper arresting efficiency is 96%.
The angle of flare is the least, and the mistake from air inlet pipe to expansion gets over smooth-going, and the angle of flare is the biggest, the most easily produces vortex, and Vortex is got over close to central axis, and therefore, selecting the angle of flare is 80 °～100 °, now in the case of same charge flow rate, Particle trapper arresting efficiency is 95%.
Described reducing agent feeding unit includes solid urea holding vessel, metering rotor and the heat resolve pipeline being sequentially connected with, described Solid urea holding vessel internal memory is placed with urea powder, and its lower surface is formed slopely the cone structure with opening.Described metering rotor For cylindric, its outer surface is interval with the pit accommodating urea powder.The cental axial position of described metering rotor connects transmission dress Put, drive metering rotor to rotate relative to solid urea holding vessel.The outer surface interval of described metering rotor is enclosed with is fixed on institute Stating the seal bootr on solid urea holding vessel, described seal bootr is directed at the opening part of described cone structure and is provided with through hole, described closing Cover is directed at described heat resolve pipeline and is again provided with through hole, rotates metering rotor, and the urea powder in solid urea holding vessel enters Entering in pit, be rotated further metering rotor, the pit equipped with urea powder turns to be directed at the through hole of described heat resolve pipeline, Urea powder drops, and waste gas blows urea powder and enters heat resolve pipeline, and the tortuous microwave that is folded to of described heat resolve pipeline is sent out In injection device, urea powder decomposes generation ammonia and Carbimide. through microwave launcher under the effect of microwave, in waste gas Steam can make Carbimide. decompose, thus produces ammonia.
As preferably, described pit is the hemispherical of a diameter of 5mm.
Accompanying drawing explanation
Utilize accompanying drawing that invention is described further, but the embodiment in accompanying drawing does not constitute any limitation of the invention, for this The those of ordinary skill in field, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to the following drawings.
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of pressure-reducing cushioning structure of the present invention.
Fig. 3 is the structural representation at another visual angle of pressure-reducing cushioning structure of the present invention.
Fig. 4 is the structural representation enlarged drawing of reducing agent feeding unit of the present invention.
Reference: 1, motor, 2, rotary shaft, 3, catalytic reduction unit, 4, air inlet pipe, 5, temperature sensor, 6, Opening and closing disc, 7, catalysis restorer, 8, pressure-reducing cushioning structure, 9, exhaustor, 10, micro particle catching unit, 11, shell body, 12, inner housing, 13, metal wire mesh filter, 14, reducing agent feeding unit, 15, microwave launcher, 16, heating point Solve pipeline, 17, seal bootr, 18, metering rotor, 19, solid urea holding vessel, 20, barrier sheet.
Detailed description of the invention
The invention will be further described with the following Examples.
Embodiment one
Refering to Fig. 1, the heat-recovering energy-saving device of high-temperature tail gas, including vent gas treatment part, described vent gas treatment part includes Control unit, reducing agent feeding unit 14, catalytic reduction unit 3, micro particle catching unit 10 and temperature sensor 5, described in urge Change reduction unit 3 to be connected by connecting pipe with described micro particle catching unit 10, and described connecting pipe is provided with branch road and connects institute State reducing agent feeding unit 14.Described control unit controls micro particle catching unit 10, reducing agent feeding unit 14, catalysis respectively Reduction unit 3 and temperature sensor 5.Described catalytic reduction unit 3 air inlet one end is located in described temperature sensor 5.
Described catalytic reduction unit 3 includes rotary shaft 2, air inlet pipe 4 and the exhaustor 9 of connection air inlet pipe 4.Described rotary shaft 2 extend across air inlet pipe 4 and exhaustor 9, the two ends of described rotary shaft 2 along the direction, axis of air inlet pipe 4, exhaustor 9 Connecting has motor 1, described motor 1 that rotary shaft 2 can be driven to rotate.Be arranged in sequence with in described rotary shaft 2 multiple can be around rotation The cylindrical catalysis restorer 7 that axle 2 rotates, the inside of described catalysis restorer 7 is interval with multiple urging along its length Change reduction passage, described recall reduction passage be divided into high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and low-temperature catalyzed go back Former passage.Being provided with spiral helicine high-temperature catalytic metallic carrier in described high-temperature catalytic reduction passage, the catalysis reduction of described middle temperature is logical It is provided with spiral helicine middle temperature catalytic metal support in road, is provided with spiral helicine low-temperature catalyzed in described low-temperature catalyzed reduction passage Metallic carrier.Described high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and the arrangement of low-temperature catalyzed reduction passage regularity.
Being additionally provided with opening and closing disc 6 in described catalysis restorer 7, described opening and closing disc 6 is positioned at one end of catalysis reduction channel inlet.Institute The surface stating opening and closing disc 6 is provided with the through hole of regular arrangement, and rotary opening closing dish 6, on described through-hole alignment catalysis restorer 7 High-temperature catalytic reduction passage, middle temperature catalysis reduction passage or low-temperature catalyzed reduction passage, cover remaining two kinds catalysis reduction passages, Waste gas enters this catalysis reduction passage by through hole and carries out the catalytic reduction reaction of correspondence.
One end of described catalysis restorer 7 air inlet is provided with movable pressure-reducing cushioning structure 8, refering to Fig. 2 and Fig. 3, described decompression Buffer structure 8 is the cylinder of hollow or discoid, and the outer surface of described pressure-reducing cushioning structure 8 is interval with multiple opening, often Being inserted with mobilizable barrier sheet 20 on individual opening, when opening and closing disc 6 needs to rotate when, it is slow that described barrier sheet 20 enters decompression Rushing structure 8 and be internally formed waste gas interception structure in pressure-reducing cushioning structure 8, waste gas need to be through multiple adjacent barrier sheets 20 composition Cavity could enter posterior catalysis restorer 7, thus temporary reduction exhaust gas pressure so that posterior opening and closing disc 6 can be suitable Profit rotates, it is to avoid exhaust gas leakage occurs.After posterior opening and closing disc 6 completes to rotate, described barrier sheet 20 detaches, and waste gas recovers former Some pressure, is rapidly introduced into posterior catalysis reduction passage.
When burning under the influence of various factors, the temperature of waste gas discharge is different, and different catalyst optimal processing temperature is different, Therefore arrange three kinds of different catalyst of operating temperature to reduce in passage in catalysis, cooperate with opening and closing disc 6, work as temperature sensing After device 5 detects EGT, according to its temperature, rotary opening closing dish 6 so that the through-hole alignment in opening and closing disc 6 adapts to this temperature The catalysis reduction passage of degree scope, covers remaining two kinds catalysis reduction passages, and waste gas is by maximum with the efficiency that its temperature matches The catalysis reduction passage changed, thus realize the maximization of exhaust treatment efficiency and effect.
Described high-temperature catalytic metallic carrier works under 400～600 DEG C of environment, and described middle temperature catalytic metal support is at 250～400 DEG C of rings Working under border, described low-temperature catalyzed metallic carrier works under 150～250 DEG C of environment.
Described high-temperature catalytic metallic carrier includes being loaded with WO3/TiO2The metallic carrier of catalyst, WO3/TiO2Under catalyst passes through Row step is carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: ammonia Water: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula half Footpath is 2.25 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metal carrier surface, Making the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, wherein microetch hole is total Area accounts for the 60% of the metal carrier surface gross area；(3) the metallic carrier roasting 5h in 900 DEG C after step (2) processes, Its surface is made to form oxide-film；(4) use sol-gel process at the surface-coated glass ceramic coating of described metallic carrier, composition For mol ratio SiO2: Al2O3=5:1；(5) butyl titanate, acetic acid and ethanol 1:8:5 in molar ratio stirring is obtained solution A, Ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B, solution B is quantitatively adding in A, is stirred vigorously and obtains 25wt.%WO3/TiO2 Catalyst colloidal sol, is immersed in 25wt.%WO by the metallic carrier of coating glass ceramic coating3/TiO230min in catalyst colloidal sol, Then slowly lifting out, dry at room temperature over night is placed in baking oven and dries at 60 DEG C, and at 500 DEG C, roasting 5h, obtains Load 25wt.%WO3WO3/TiO2The high-temperature catalytic metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more WO3/TiO2Catalyst.When the microetch hole gross area accounts for the 60% of the metal carrier surface gross area, Under 400～600 DEG C of environment, through laser ablation high-temperature catalytic metallic carrier compared to not through laser ablation high-temperature catalytic gold The catalytic efficiency belonging to carrier improves 35%.
At a temperature of 400～550 DEG C, the catalysis activity with temperature of high-temperature catalytic metallic carrier raises and strengthens, and conversion rate of NOx is above 80%, more than 92% when 500 DEG C, when temperature is higher than occurring downward trend after 500 DEG C, but NOx still has 65% turn when 600 DEG C Rate.
Described middle temperature catalytic metal support includes being loaded with CeO2/W25The metallic carrier of Ti catalyst, CeO2/W25Ti catalyst leads to Cross the following step to be carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: Ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula Radius is 2.25 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metallic carrier table Face so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, forms microetch hole, wherein microetch The hole gross area accounts for the 60% of the metal carrier surface gross area；(3) gold after cleaning of the metallic carrier after step (2) processes Belong to carrier roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at the table of described metallic carrier Topcoating covers glass ceramic coating, and composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and ethanol by mole Obtaining solution A than 1:8:5 stirring, ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B；(6) solution B is quantitatively adding in A, Being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting 4h at 600 DEG C, Obtain WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Ce (NO3)3·6H2O is dissolved in water and obtains nitre Acid cerium solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and is born after 1h is stirred at room temperature Carry the CeO of 10wt.%Ce2/W25Ti catalyst colloidal sol, is immersed in CeO by the metallic carrier of coating glass ceramic coating2/W25Ti 1h in catalyst colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, then at 500 DEG C Lower roasting 5h, obtains being loaded with CeO2/W25The middle temperature catalytic metal support of Ti catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more CeO2/W25Ti catalyst.When the microetch hole gross area accounts for the 60% of the metal carrier surface gross area, Under 250～400 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 30%.
At a temperature of 250～300 DEG C, the catalysis activity with temperature of middle temperature catalytic metal support raises and strengthens, and conversion rate of NOx is the highest In 60%, at a temperature of 250～300 DEG C, conversion rate of NOx reaches the highest, and close to 80%, after temperature is higher than 400 DEG C, middle temperature is urged The catalysis activity changing metallic carrier reduces rapidly.
Described low-temperature catalyzed metallic carrier includes being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst, Cr2O3-SO4 2-/TiO2Urge Agent is carried on metallic carrier through the following steps: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution becomes It is divided into water: ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilize wavelength for 532nm, pulse width be 500ps～50ns, Laser facula radius is 2.25 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after gold Belong to carrier surface so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, Wherein the microetch hole gross area accounts for the 60% of the metal carrier surface gross area；(3) metallic carrier after step (2) processes is in by clear Metallic carrier after washing is roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at described metal The surface-coated glass ceramic coating of carrier, composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and second Alcohol 1:8:5 in molar ratio stirring obtains solution A, and ammonium paratungstate is dissolved in the sulfuric acid solution of 70% and obtains solution B, and solution B is fixed Amount adds in A, and wherein sulfate radical is SO with the mol ratio of titanium dioxide4 2-: TiO2=1:4；(6) solution B is quantitatively adding A In, it being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting at 600 DEG C 4h, obtains WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Cr (NO3)3·9H2O is dissolved in water and obtains To chromium nitrate solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and obtains after 1h is stirred at room temperature To Cr2O3-SO4 2-/TiO2Catalyst colloidal sol, is immersed in Cr by the metallic carrier of coating glass ceramic coating2O3-SO4 2-/TiO2Catalyst 1h in colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, roasts at 500 DEG C Burn 5h, obtain being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more Cr2O3-SO4 2-/TiO2Catalyst.When the microetch hole gross area accounts for the 60% of the metal carrier surface gross area, Under 150～250 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 32%.
Load 10wt.%Ce low-temperature catalyzed metallic carrier when 150～250 DEG C, conversion rate of NOx along with temperature increase and by Edge up height, close to 100%.In 175～250 DEG C of temperature ranges, conversion rate of NOx is all more than 80%.
Compared to using single catalyst, the NOx ratio discharge used after the catalytic conversion system of the present invention in waste gas from 12.192g/kW h drops to 2.579g/kW h, and treatment effect significantly promotes.
Described micro particle catching unit 10 includes housing and polylith micro particle catching metallic carrier, under described micro particle catching metallic carrier passes through Row step process: taking quantitative chromic nitrate, cobalt nitrate and citric acid and be dissolved in deionized water, wherein chromium ion rubs with citric acid molecule That ratio is 1:1.5, and chromium ion concentration is 0.2mol/L.It is applied on metallic carrier after 80 DEG C of complex reaction 5h, described micro- Grain trapping metallic carrier obtains final products after 600 DEG C of roasting 5h.In order to carry high catalytic activity further, at catalyst surface Support and accounted for the precious metals pt that catalyst quality mark is 0.5%.After described final products cut into elongate, mutually overlap joint forms gold Belonging to silk screen, described metal gauze is vertically connected with the metal wire mesh filter 13 forming intensive porous.
Described housing includes that shell body 11 and inner housing 12, described shell body 11 interval wrap up described inner housing 12 so that shell Form vacuum layer between body 11 and inner housing 12, keep the temperature of metal wire mesh filter 13, promote its passive combustive regeneration, Reduce the exhaust back pressure in particle trapper.Described inner housing 12 is divided into expansion, filtration fraction and constriction, described expansion Opening part and connect air inlet pipe, described constriction connects exhaustor, the external diameter of the constriction of wherein said inner housing 12 and aerofluxus Pipe external diameter diameter ratio is 2.5～4, and the angle of described inner housing 12 expansion is 80 °～100 °.
In particle trapper, the uniformity of flow velocity and particle concentration determines the height of particle trapper inner filtration body utilization rate, filtration Body regeneration period and the length in filtering bodies service life, in the actual application of particle trapper, the exhaust parameter of particle trapper (exhaust entrance speed) and structural parameters (angle of flare, diameter ratio) are to velocity flow profile and the uniformity of particle concentration distributions There is very important impact.
In the case of inlet flow rate (inlet velocity and inlet-duct area) is identical, diameter flows through expansion than little inner housing 12 Time, speed reduces less, and the eddy current effect of generation is less, almost without, but, less diameter ratio can make microgranule catch In storage, exhaust flow rate is higher, exhaust flow rate skewness, thus the microgranule in particle trapper during causing actual filtration Concentrate at the central axis of metal wire mesh filter 13, increase the weight of the load at metal wire mesh filter 13 central axis.When directly When footpath ratio is 2～4, the VELOCITY DISTRIBUTION in each cross section of particle trapper is more uniform, thus particle deposition in metal wire mesh filter 13 It is distributed the most uniform.Now in the case of same charge flow rate, particle trapper arresting efficiency is 96%.
The angle of flare is the least, and the mistake from air inlet pipe to expansion gets over smooth-going, and the angle of flare is the biggest, the most easily produces vortex, and Vortex is got over close to central axis, and therefore, selecting the angle of flare is 80 °～100 °, now in the case of same charge flow rate, Particle trapper arresting efficiency is 95%.
Refering to Fig. 4, described reducing agent feeding unit 14 includes solid urea holding vessel 19, metering rotor 18 and being sequentially connected with Heat resolve pipeline 16, described solid urea holding vessel 19 internal memory is placed with urea powder, and its lower surface is formed slopely with opening Cone structure.Described metering rotor 18 is cylindric, and its outer surface is interval with the pit accommodating urea powder.Described metering The cental axial position of rotor 18 connects actuating device, drives metering rotor 18 to rotate relative to solid urea holding vessel 19.Described The outer surface interval of metering rotor 18 is enclosed with the seal bootr 17 being fixed on described solid urea holding vessel 19, described seal bootr 17 opening parts being directed at described cone structure are provided with through hole, and described seal bootr 17 is directed at described heat resolve pipeline 16 and sets equally Having through hole, rotate metering rotor 18, the urea powder in solid urea holding vessel 19 enters in pit, is rotated further metering and turns Son 18, the pit equipped with urea powder turns to be directed at the through hole of described heat resolve pipeline 16, and urea powder drops, useless Air-blowing is moved urea powder and is entered heat resolve pipeline 16, and described heat resolve pipeline 16 is tortuous to be folded in microwave launcher 15, Urea powder decomposes generation ammonia and Carbimide. when microwave launcher 15 under the effect of microwave, and the steam in waste gas can Make Carbimide. decompose, thus produce ammonia.
In being embodied as, described pit is the hemispherical of a diameter of 5mm.
Embodiment two
Refering to Fig. 1, the heat-recovering energy-saving device of high-temperature tail gas, including vent gas treatment part, described vent gas treatment part includes Control unit, reducing agent feeding unit 14, catalytic reduction unit 3, micro particle catching unit 10 and temperature sensor 5, described in urge Change reduction unit 3 to be connected by connecting pipe with described micro particle catching unit 10, and described connecting pipe is provided with branch road and connects institute State reducing agent feeding unit 14.Described control unit controls micro particle catching unit 10, reducing agent feeding unit 14, catalysis respectively Reduction unit 3 and temperature sensor 5.Described catalytic reduction unit 3 air inlet one end is located in described temperature sensor 5.
Described catalytic reduction unit 3 includes rotary shaft 2, air inlet pipe 4 and the exhaustor 9 of connection air inlet pipe 4.Described rotary shaft 2 extend across air inlet pipe 4 and exhaustor 9, the two ends of described rotary shaft 2 along the direction, axis of air inlet pipe 4, exhaustor 9 Connecting has motor 1, described motor 1 that rotary shaft 2 can be driven to rotate.Be arranged in sequence with in described rotary shaft 2 multiple can be around rotation The cylindrical catalysis restorer 7 that axle 2 rotates, the inside of described catalysis restorer 7 is interval with multiple urging along its length Change reduction passage, described recall reduction passage be divided into high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and low-temperature catalyzed go back Former passage.Being provided with spiral helicine high-temperature catalytic metallic carrier in described high-temperature catalytic reduction passage, the catalysis reduction of described middle temperature is logical It is provided with spiral helicine middle temperature catalytic metal support in road, is provided with spiral helicine low-temperature catalyzed in described low-temperature catalyzed reduction passage Metallic carrier.Described high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and the arrangement of low-temperature catalyzed reduction passage regularity.
Being additionally provided with opening and closing disc 6 in described catalysis restorer 7, described opening and closing disc 6 is positioned at one end of catalysis reduction channel inlet.Institute The surface stating opening and closing disc 6 is provided with the through hole of regular arrangement, and rotary opening closing dish 6, on described through-hole alignment catalysis restorer 7 High-temperature catalytic reduction passage, middle temperature catalysis reduction passage or low-temperature catalyzed reduction passage, cover remaining two kinds catalysis reduction passages, Waste gas enters this catalysis reduction passage by through hole and carries out the catalytic reduction reaction of correspondence.
One end of described catalysis restorer 7 air inlet is provided with movable pressure-reducing cushioning structure 8, refering to Fig. 2 and Fig. 3, described decompression Buffer structure 8 is the cylinder of hollow or discoid, and the outer surface of described pressure-reducing cushioning structure 8 is interval with multiple opening, often Being inserted with mobilizable barrier sheet 20 on individual opening, when opening and closing disc 6 needs to rotate when, it is slow that described barrier sheet 20 enters decompression Rushing structure 8 and be internally formed waste gas interception structure in pressure-reducing cushioning structure 8, waste gas need to be through multiple adjacent barrier sheets 20 composition Cavity could enter posterior catalysis restorer 7, thus temporary reduction exhaust gas pressure so that posterior opening and closing disc 6 can be suitable Profit rotates, it is to avoid exhaust gas leakage occurs.After posterior opening and closing disc 6 completes to rotate, described barrier sheet 20 detaches, and waste gas recovers former Some pressure, is rapidly introduced into posterior catalysis reduction passage.
When burning under the influence of various factors, the temperature of waste gas discharge is different, and different catalyst optimal processing temperature is different, Therefore arrange three kinds of different catalyst of operating temperature to reduce in passage in catalysis, cooperate with opening and closing disc 6, work as temperature sensing After device 5 detects EGT, according to its temperature, rotary opening closing dish 6 so that the through-hole alignment in opening and closing disc 6 adapts to this temperature The catalysis reduction passage of degree scope, covers remaining two kinds catalysis reduction passages, and waste gas is by maximum with the efficiency that its temperature matches The catalysis reduction passage changed, thus realize the maximization of exhaust treatment efficiency and effect.
Described high-temperature catalytic metallic carrier works under 400～600 DEG C of environment, and described middle temperature catalytic metal support is at 250～400 DEG C of rings Working under border, described low-temperature catalyzed metallic carrier works under 150～250 DEG C of environment.
Described high-temperature catalytic metallic carrier includes being loaded with WO3/TiO2The metallic carrier of catalyst, WO3/TiO2Under catalyst passes through Row step is carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: ammonia Water: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula half Footpath is 2.35 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metal carrier surface, Making the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, wherein microetch hole is total Area accounts for the 65% of the metal carrier surface gross area；(3) the metallic carrier roasting 5h in 900 DEG C after step (2) processes, Its surface is made to form oxide-film；(4) use sol-gel process at the surface-coated glass ceramic coating of described metallic carrier, composition For mol ratio SiO2: Al2O3=5:1；(5) butyl titanate, acetic acid and ethanol 1:8:5 in molar ratio stirring is obtained solution A, Ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B, solution B is quantitatively adding in A, is stirred vigorously and obtains 25wt.%WO3/TiO2 Catalyst colloidal sol, is immersed in 25wt.%WO by the metallic carrier of coating glass ceramic coating3/TiO230min in catalyst colloidal sol, Then slowly lifting out, dry at room temperature over night is placed in baking oven and dries at 60 DEG C, and at 550 DEG C, roasting 5h, obtains Load 25wt.%WO3WO3/TiO2The high-temperature catalytic metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more WO3/TiO2Catalyst.When the microetch hole gross area accounts for the 65% of the metal carrier surface gross area, Under 400～600 DEG C of environment, through laser ablation high-temperature catalytic metallic carrier compared to not through laser ablation high-temperature catalytic gold The catalytic efficiency belonging to carrier improves 36%.
At a temperature of 400～550 DEG C, the catalysis activity with temperature of high-temperature catalytic metallic carrier raises and strengthens, and conversion rate of NOx is above 80%, more than 92% when 500 DEG C, when temperature is higher than occurring downward trend after 500 DEG C, but NOx still has 65% turn when 600 DEG C Rate.
Described middle temperature catalytic metal support includes being loaded with CeO2/W25The metallic carrier of Ti catalyst, CeO2/W25Ti catalyst leads to Cross the following step to be carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: Ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula Radius is 2.35 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metallic carrier table Face so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, forms microetch hole, wherein microetch The hole gross area accounts for the 65% of the metal carrier surface gross area；(3) gold after cleaning of the metallic carrier after step (2) processes Belong to carrier roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at the table of described metallic carrier Topcoating covers glass ceramic coating, and composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and ethanol by mole Obtaining solution A than 1:8:5 stirring, ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B；(6) solution B is quantitatively adding in A, Being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting 4h at 600 DEG C, Obtain WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Ce (NO3)3·6H2O is dissolved in water and obtains nitre Acid cerium solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and is born after 1h is stirred at room temperature Carry the CeO of 10wt.%Ce2/W25Ti catalyst colloidal sol, is immersed in CeO by the metallic carrier of coating glass ceramic coating2/W25Ti 1h in catalyst colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, then at 550 DEG C Lower roasting 5h, obtains being loaded with CeO2/W25The middle temperature catalytic metal support of Ti catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more CeO2/W25Ti catalyst.When the microetch hole gross area accounts for the 60% of the metal carrier surface gross area, Under 250～400 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 29%.
At a temperature of 250～300 DEG C, the catalysis activity with temperature of middle temperature catalytic metal support raises and strengthens, and conversion rate of NOx is the highest In 60%, at a temperature of 250～300 DEG C, conversion rate of NOx reaches the highest, and close to 80%, after temperature is higher than 400 DEG C, middle temperature is urged The catalysis activity changing metallic carrier reduces rapidly.
Described low-temperature catalyzed metallic carrier includes being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst, Cr2O3-SO4 2-/TiO2Urge Agent is carried on metallic carrier through the following steps: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution becomes It is divided into water: ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilize wavelength for 532nm, pulse width be 500ps～50ns, Laser facula radius is 2.35 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after gold Belong to carrier surface so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, Wherein the microetch hole gross area accounts for the 65% of the metal carrier surface gross area；(3) metallic carrier after step (2) processes is in by clear Metallic carrier after washing is roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at described metal The surface-coated glass ceramic coating of carrier, composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and second Alcohol 1:8:5 in molar ratio stirring obtains solution A, and ammonium paratungstate is dissolved in the sulfuric acid solution of 70% and obtains solution B, and solution B is fixed Amount adds in A, and wherein sulfate radical is SO with the mol ratio of titanium dioxide4 2-: TiO2=1:4；(6) solution B is quantitatively adding A In, it being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting at 600 DEG C 4h, obtains WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Cr (NO3)3·9H2O is dissolved in water and obtains To chromium nitrate solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and obtains after 1h is stirred at room temperature To Cr2O3-SO4 2-/TiO2Catalyst colloidal sol, is immersed in Cr by the metallic carrier of coating glass ceramic coating2O3-SO4 2-/TiO2Catalyst 1h in colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, roasts at 550 DEG C Burn 5h, obtain being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more Cr2O3-SO4 2-/TiO2Catalyst.When the microetch hole gross area accounts for the 65% of the metal carrier surface gross area, Under 150～250 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 32%.
Load 10wt.%Ce low-temperature catalyzed metallic carrier when 150～250 DEG C, conversion rate of NOx along with temperature increase and by Edge up height, close to 100%.In 175～250 DEG C of temperature ranges, conversion rate of NOx is all more than 80%.
Compared to using single catalyst, the NOx ratio discharge used after the catalytic conversion system of the present invention in waste gas from 12.192g/kW h drops to 1.985g/kW h, and treatment effect significantly promotes.
Described micro particle catching unit 10 includes housing and polylith micro particle catching metallic carrier, under described micro particle catching metallic carrier passes through Row step process: taking quantitative chromic nitrate, cobalt nitrate and citric acid and be dissolved in deionized water, wherein chromium ion rubs with citric acid molecule That ratio is 1:1.5, and chromium ion concentration is 0.2mol/L.It is applied in after 80 DEG C of complex reaction 5h on micro particle catching metallic carrier, Described micro particle catching metallic carrier obtains final products after 600 DEG C of roasting 5h.In order to carry high catalytic activity further, in catalysis Agent surface has supported and has accounted for the precious metals pt that catalyst quality mark is 0.5%.Described final products mutually overlap after cutting into elongate Forming metal gauze, described metal gauze is vertically connected with the metal wire mesh filter 13 forming intensive porous.
Described housing includes that shell body 11 and inner housing 12, described shell body 11 interval wrap up described inner housing 12 so that shell Form vacuum layer between body 11 and inner housing 12, keep the temperature of metal wire mesh filter 13, promote its passive combustive regeneration, Reduce the exhaust back pressure in particle trapper.Described inner housing 12 is divided into expansion, filtration fraction and constriction, described expansion Opening part and connect air inlet pipe, described constriction connects exhaustor, the external diameter of the constriction of wherein said inner housing 12 and aerofluxus Pipe external diameter diameter ratio is 2.5～4, and the angle of described inner housing 12 expansion is 80 °～100 °.
In particle trapper, the uniformity of flow velocity and particle concentration determines the height of particle trapper inner filtration body utilization rate, filtration Body regeneration period and the length in filtering bodies service life, in the actual application of particle trapper, the exhaust parameter of particle trapper (exhaust entrance speed) and structural parameters (angle of flare, diameter ratio) are to velocity flow profile and the uniformity of particle concentration distributions There is very important impact.
In the case of inlet flow rate (inlet velocity and inlet-duct area) is identical, diameter flows through expansion than little inner housing 12 Time, speed reduces less, and the eddy current effect of generation is less, almost without, but, less diameter ratio can make microgranule catch In storage, exhaust flow rate is higher, exhaust flow rate skewness, thus the microgranule in particle trapper during causing actual filtration Concentrate at the central axis of metal wire mesh filter 13, increase the weight of the load at metal wire mesh filter 13 central axis.When directly When footpath ratio is 2～4, the VELOCITY DISTRIBUTION in each cross section of particle trapper is more uniform, thus particle deposition in metal wire mesh filter 13 It is distributed the most uniform.Now in the case of same charge flow rate, particle trapper arresting efficiency is 96%.
The angle of flare is the least, and the mistake from air inlet pipe to expansion gets over smooth-going, and the angle of flare is the biggest, the most easily produces vortex, and Vortex is got over close to central axis, and therefore, selecting the angle of flare is 80 °～100 °, now in the case of same charge flow rate, Particle trapper arresting efficiency is 95%.
Refering to Fig. 4, described reducing agent feeding unit 14 includes solid urea holding vessel 19, metering rotor 18 and being sequentially connected with Heat resolve pipeline 16, described solid urea holding vessel 19 internal memory is placed with urea powder, and its lower surface is formed slopely with opening Cone structure.Described metering rotor 18 is cylindric, and its outer surface is interval with the pit accommodating urea powder.Described metering The cental axial position of rotor 18 connects actuating device, drives metering rotor 18 to rotate relative to solid urea holding vessel 19.Described The outer surface interval of metering rotor 18 is enclosed with the seal bootr 17 being fixed on described solid urea holding vessel 19, described seal bootr 17 opening parts being directed at described cone structure are provided with through hole, and described seal bootr 17 is directed at described heat resolve pipeline 16 and sets equally Having through hole, rotate metering rotor 18, the urea powder in solid urea holding vessel 19 enters in pit, is rotated further metering and turns Son 18, the pit equipped with urea powder turns to be directed at the through hole of described heat resolve pipeline 16, and urea powder drops, useless Air-blowing is moved urea powder and is entered heat resolve pipeline 16, and described heat resolve pipeline 16 is tortuous to be folded in microwave launcher 15, Urea powder decomposes generation ammonia and Carbimide. when microwave launcher 15 under the effect of microwave, and the steam in waste gas can Make Carbimide. decompose, thus produce ammonia.
In being embodied as, described pit is the hemispherical of a diameter of 5mm.
Embodiment three
Refering to Fig. 1, the heat-recovering energy-saving device of high-temperature tail gas, including vent gas treatment part, described vent gas treatment part includes Control unit, reducing agent feeding unit 14, catalytic reduction unit 3, micro particle catching unit 10 and temperature sensor 5, described in urge Change reduction unit 3 to be connected by connecting pipe with described micro particle catching unit 10, and described connecting pipe is provided with branch road and connects institute State reducing agent feeding unit 14.Described control unit controls micro particle catching unit 10, reducing agent feeding unit 14, catalysis respectively Reduction unit 3 and temperature sensor 5.Described catalytic reduction unit 3 air inlet one end is located in described temperature sensor 5.
Described catalytic reduction unit 3 includes rotary shaft 2, air inlet pipe 4 and the exhaustor 9 of connection air inlet pipe 4.Described rotary shaft 2 extend across air inlet pipe 4 and exhaustor 9, the two ends of described rotary shaft 2 along the direction, axis of air inlet pipe 4, exhaustor 9 Connecting has motor 1, described motor 1 that rotary shaft 2 can be driven to rotate.Be arranged in sequence with in described rotary shaft 2 multiple can be around rotation The cylindrical catalysis restorer 7 that axle 2 rotates, the inside of described catalysis restorer 7 is interval with multiple urging along its length Change reduction passage, described recall reduction passage be divided into high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and low-temperature catalyzed go back Former passage.Being provided with spiral helicine high-temperature catalytic metallic carrier in described high-temperature catalytic reduction passage, the catalysis reduction of described middle temperature is logical It is provided with spiral helicine middle temperature catalytic metal support in road, is provided with spiral helicine low-temperature catalyzed in described low-temperature catalyzed reduction passage Metallic carrier.Described high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and the arrangement of low-temperature catalyzed reduction passage regularity.
Being additionally provided with opening and closing disc 6 in described catalysis restorer 7, described opening and closing disc 6 is positioned at one end of catalysis reduction channel inlet.Institute The surface stating opening and closing disc 6 is provided with the through hole of regular arrangement, and rotary opening closing dish 6, on described through-hole alignment catalysis restorer 7 High-temperature catalytic reduction passage, middle temperature catalysis reduction passage or low-temperature catalyzed reduction passage, cover remaining two kinds catalysis reduction passages, Waste gas enters this catalysis reduction passage by through hole and carries out the catalytic reduction reaction of correspondence.
One end of described catalysis restorer 7 air inlet is provided with movable pressure-reducing cushioning structure 8, refering to Fig. 2 and Fig. 3, described decompression Buffer structure 8 is the cylinder of hollow or discoid, and the outer surface of described pressure-reducing cushioning structure 8 is interval with multiple opening, often Being inserted with mobilizable barrier sheet 20 on individual opening, when opening and closing disc 6 needs to rotate when, it is slow that described barrier sheet 20 enters decompression Rushing structure 8 and be internally formed waste gas interception structure in pressure-reducing cushioning structure 8, waste gas need to be through multiple adjacent barrier sheets 20 composition Cavity could enter posterior catalysis restorer 7, thus temporary reduction exhaust gas pressure so that posterior opening and closing disc 6 can be suitable Profit rotates, it is to avoid exhaust gas leakage occurs.After posterior opening and closing disc 6 completes to rotate, described barrier sheet 20 detaches, and waste gas recovers former Some pressure, is rapidly introduced into posterior catalysis reduction passage.
When burning under the influence of various factors, the temperature of waste gas discharge is different, and different catalyst optimal processing temperature is different, Therefore arrange three kinds of different catalyst of operating temperature to reduce in passage in catalysis, cooperate with opening and closing disc 6, work as temperature sensing After device 5 detects EGT, according to its temperature, rotary opening closing dish 6 so that the through-hole alignment in opening and closing disc 6 adapts to this temperature The catalysis reduction passage of degree scope, covers remaining two kinds catalysis reduction passages, and waste gas is by maximum with the efficiency that its temperature matches The catalysis reduction passage changed, thus realize the maximization of exhaust treatment efficiency and effect.
Described high-temperature catalytic metallic carrier works under 400～600 DEG C of environment, and described middle temperature catalytic metal support is at 250～400 DEG C of rings Working under border, described low-temperature catalyzed metallic carrier works under 150～250 DEG C of environment.
Described high-temperature catalytic metallic carrier includes being loaded with WO3/TiO2The metallic carrier of catalyst, WO3/TiO2Under catalyst passes through Row step is carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: ammonia Water: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula half Footpath is 2.40 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metal carrier surface, Making the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, wherein microetch hole is total Area accounts for the 70% of the metal carrier surface gross area；(3) the metallic carrier roasting 5h in 900 DEG C after step (2) processes, Its surface is made to form oxide-film；(4) use sol-gel process at the surface-coated glass ceramic coating of described metallic carrier, composition For mol ratio SiO2: Al2O3=5:1；(5) butyl titanate, acetic acid and ethanol 1:8:5 in molar ratio stirring is obtained solution A, Ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B, solution B is quantitatively adding in A, is stirred vigorously and obtains 25wt.%WO3/TiO2 Catalyst colloidal sol, is immersed in 25wt.%WO by the metallic carrier of coating glass ceramic coating3/TiO230min in catalyst colloidal sol, Then slowly lifting out, dry at room temperature over night is placed in baking oven and dries at 60 DEG C, and at 500 DEG C, roasting 6h, obtains Load 25wt.%WO3WO3/TiO2The high-temperature catalytic metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more WO3/TiO2Catalyst.When the microetch hole gross area accounts for the 70% of the metal carrier surface gross area, Under 400～600 DEG C of environment, through laser ablation high-temperature catalytic metallic carrier compared to not through laser ablation high-temperature catalytic gold The catalytic efficiency belonging to carrier improves 34%.
At a temperature of 400～550 DEG C, the catalysis activity with temperature of high-temperature catalytic metallic carrier raises and strengthens, and conversion rate of NOx is above 80%, more than 92% when 500 DEG C, when temperature is higher than occurring downward trend after 500 DEG C, but NOx still has 65% turn when 600 DEG C Rate.
Described middle temperature catalytic metal support includes being loaded with CeO2/W25The metallic carrier of Ti catalyst, CeO2/W25Ti catalyst leads to Cross the following step to be carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: Ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula Radius is 2.40 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metallic carrier table Face so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, forms microetch hole, wherein microetch The hole gross area accounts for the 70% of the metal carrier surface gross area；(3) gold after cleaning of the metallic carrier after step (2) processes Belong to carrier roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at the table of described metallic carrier Topcoating covers glass ceramic coating, and composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and ethanol by mole Obtaining solution A than 1:8:5 stirring, ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B；(6) solution B is quantitatively adding in A, Being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting 4h at 600 DEG C, Obtain WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Ce (NO3)3·6H2O is dissolved in water and obtains nitre Acid cerium solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and is born after 1h is stirred at room temperature Carry the CeO of 10wt.%Ce2/W25Ti catalyst colloidal sol, is immersed in CeO by the metallic carrier of coating glass ceramic coating2/W25Ti 1h in catalyst colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, then at 500 DEG C Lower roasting 6h, obtains being loaded with CeO2/W25The middle temperature catalytic metal support of Ti catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more CeO2/W25Ti catalyst.When the microetch hole gross area accounts for the 70% of the metal carrier surface gross area, Under 250～400 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 32%.
At a temperature of 250～300 DEG C, the catalysis activity with temperature of middle temperature catalytic metal support raises and strengthens, and conversion rate of NOx is the highest In 60%, at a temperature of 250～300 DEG C, conversion rate of NOx reaches the highest, and close to 80%, after temperature is higher than 400 DEG C, middle temperature is urged The catalysis activity changing metallic carrier reduces rapidly.
Described low-temperature catalyzed metallic carrier includes being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst, Cr2O3-SO4 2-/TiO2Urge Agent is carried on metallic carrier through the following steps: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution becomes It is divided into water: ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilize wavelength for 532nm, pulse width be 500ps～50ns, Laser facula radius is 2.40 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after gold Belong to carrier surface so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, Wherein the microetch hole gross area accounts for the 70% of the metal carrier surface gross area；(3) metallic carrier after step (2) processes is in by clear Metallic carrier after washing is roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at described metal The surface-coated glass ceramic coating of carrier, composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and second Alcohol 1:8:5 in molar ratio stirring obtains solution A, and ammonium paratungstate is dissolved in the sulfuric acid solution of 70% and obtains solution B, and solution B is fixed Amount adds in A, and wherein sulfate radical is SO with the mol ratio of titanium dioxide4 2-: TiO2=1:4；(6) solution B is quantitatively adding A In, it being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting at 600 DEG C 4h, obtains WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Cr (NO3)3·9H2O is dissolved in water and obtains To chromium nitrate solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and obtains after 1h is stirred at room temperature To Cr2O3-SO4 2-/TiO2Catalyst colloidal sol, is immersed in Cr by the metallic carrier of coating glass ceramic coating2O3-SO4 2-/TiO2Catalyst 1h in colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, roasts at 500 DEG C Burn 6h, obtain being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more Cr2O3-SO4 2-/TiO2Catalyst.When the microetch hole gross area accounts for the 70% of the metal carrier surface gross area, Under 150～250 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 31%.
Load 10wt.%Ce low-temperature catalyzed metallic carrier when 150～250 DEG C, conversion rate of NOx along with temperature increase and by Edge up height, close to 100%.In 175～250 DEG C of temperature ranges, conversion rate of NOx is all more than 80%.
Compared to using single catalyst, the NOx ratio discharge used after the catalytic conversion system of the present invention in waste gas from 12.192g/kW h drops to 2.174g/kW h, and treatment effect significantly promotes.
Described micro particle catching unit 10 includes housing and polylith micro particle catching metallic carrier, under described micro particle catching metallic carrier passes through Row step process: taking quantitative chromic nitrate, cobalt nitrate and citric acid and be dissolved in deionized water, wherein chromium ion rubs with citric acid molecule That ratio is 1:1.5, and chromium ion concentration is 0.2mol/L.It is applied in after 80 DEG C of complex reaction 5h on micro particle catching metallic carrier, Described micro particle catching metallic carrier obtains final products after 600 DEG C of roasting 5h.In order to carry high catalytic activity further, in catalysis Agent surface has supported and has accounted for the precious metals pt that catalyst quality mark is 0.5%.Described final products mutually overlap after cutting into elongate Forming metal gauze, described metal gauze is vertically connected with the metal wire mesh filter 13 forming intensive porous.
Described housing includes that shell body 11 and inner housing 12, described shell body 11 interval wrap up described inner housing 12 so that shell Form vacuum layer between body 11 and inner housing 12, keep the temperature of metal wire mesh filter 13, promote its passive combustive regeneration, Reduce the exhaust back pressure in particle trapper.Described inner housing 12 is divided into expansion, filtration fraction and constriction, described expansion Opening part and connect air inlet pipe, described constriction connects exhaustor, the external diameter of the constriction of wherein said inner housing 12 and aerofluxus Pipe external diameter diameter ratio is 2.5～4, and the angle of described inner housing 12 expansion is 80 °～100 °.
In particle trapper, the uniformity of flow velocity and particle concentration determines the height of particle trapper inner filtration body utilization rate, filtration Body regeneration period and the length in filtering bodies service life, in the actual application of particle trapper, the exhaust parameter of particle trapper (exhaust entrance speed) and structural parameters (angle of flare, diameter ratio) are to velocity flow profile and the uniformity of particle concentration distributions There is very important impact.
In the case of inlet flow rate (inlet velocity and inlet-duct area) is identical, diameter flows through expansion than little inner housing 12 Time, speed reduces less, and the eddy current effect of generation is less, almost without, but, less diameter ratio can make microgranule catch In storage, exhaust flow rate is higher, exhaust flow rate skewness, thus the microgranule in particle trapper during causing actual filtration Concentrate at the central axis of metal wire mesh filter 13, increase the weight of the load at metal wire mesh filter 13 central axis.When directly When footpath ratio is 2～4, the VELOCITY DISTRIBUTION in each cross section of particle trapper is more uniform, thus particle deposition in metal wire mesh filter 13 It is distributed the most uniform.Now in the case of same charge flow rate, particle trapper arresting efficiency is 96%.
The angle of flare is the least, and the mistake from air inlet pipe to expansion gets over smooth-going, and the angle of flare is the biggest, the most easily produces vortex, and Vortex is got over close to central axis, and therefore, selecting the angle of flare is 80 °～100 °, now in the case of same charge flow rate, Particle trapper arresting efficiency is 95%.
Refering to Fig. 4, described reducing agent feeding unit 14 includes solid urea holding vessel 19, metering rotor 18 and being sequentially connected with Heat resolve pipeline 16, described solid urea holding vessel 19 internal memory is placed with urea powder, and its lower surface is formed slopely with opening Cone structure.Described metering rotor 18 is cylindric, and its outer surface is interval with the pit accommodating urea powder.Described metering The cental axial position of rotor 18 connects actuating device, drives metering rotor 18 to rotate relative to solid urea holding vessel 19.Described The outer surface interval of metering rotor 18 is enclosed with the seal bootr 17 being fixed on described solid urea holding vessel 19, described seal bootr 17 opening parts being directed at described cone structure are provided with through hole, and described seal bootr 17 is directed at described heat resolve pipeline 16 and sets equally Having through hole, rotate metering rotor 18, the urea powder in solid urea holding vessel 19 enters in pit, is rotated further metering and turns Son 18, the pit equipped with urea powder turns to be directed at the through hole of described heat resolve pipeline 16, and urea powder drops, useless Air-blowing is moved urea powder and is entered heat resolve pipeline 16, and described heat resolve pipeline 16 is tortuous to be folded in microwave launcher 15, Urea powder decomposes generation ammonia and Carbimide. when microwave launcher 15 under the effect of microwave, and the steam in waste gas can Make Carbimide. decompose, thus produce ammonia.
In being embodied as, described pit is the hemispherical of a diameter of 5mm.
Embodiment four
Refering to Fig. 1, the heat-recovering energy-saving device of high-temperature tail gas, including vent gas treatment part, described vent gas treatment part includes Control unit, reducing agent feeding unit 14, catalytic reduction unit 3, micro particle catching unit 10 and temperature sensor 5, described in urge Change reduction unit 3 to be connected by connecting pipe with described micro particle catching unit 10, and described connecting pipe is provided with branch road and connects institute State reducing agent feeding unit 14.Described control unit controls micro particle catching unit 10, reducing agent feeding unit 14, catalysis respectively Reduction unit 3 and temperature sensor 5.Described catalytic reduction unit 3 air inlet one end is located in described temperature sensor 5.
Described catalytic reduction unit 3 includes rotary shaft 2, air inlet pipe 4 and the exhaustor 9 of connection air inlet pipe 4.Described rotary shaft 2 extend across air inlet pipe 4 and exhaustor 9, the two ends of described rotary shaft 2 along the direction, axis of air inlet pipe 4, exhaustor 9 Connecting has motor 1, described motor 1 that rotary shaft 2 can be driven to rotate.Be arranged in sequence with in described rotary shaft 2 multiple can be around rotation The cylindrical catalysis restorer 7 that axle 2 rotates, the inside of described catalysis restorer 7 is interval with multiple urging along its length Change reduction passage, described recall reduction passage be divided into high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and low-temperature catalyzed go back Former passage.Being provided with spiral helicine high-temperature catalytic metallic carrier in described high-temperature catalytic reduction passage, the catalysis reduction of described middle temperature is logical It is provided with spiral helicine middle temperature catalytic metal support in road, is provided with spiral helicine low-temperature catalyzed in described low-temperature catalyzed reduction passage Metallic carrier.Described high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and the arrangement of low-temperature catalyzed reduction passage regularity.
Being additionally provided with opening and closing disc 6 in described catalysis restorer 7, described opening and closing disc 6 is positioned at one end of catalysis reduction channel inlet.Institute The surface stating opening and closing disc 6 is provided with the through hole of regular arrangement, and rotary opening closing dish 6, on described through-hole alignment catalysis restorer 7 High-temperature catalytic reduction passage, middle temperature catalysis reduction passage or low-temperature catalyzed reduction passage, cover remaining two kinds catalysis reduction passages, Waste gas enters this catalysis reduction passage by through hole and carries out the catalytic reduction reaction of correspondence.
One end of described catalysis restorer 7 air inlet is provided with movable pressure-reducing cushioning structure 8, refering to Fig. 2 and Fig. 3, described decompression Buffer structure 8 is the cylinder of hollow or discoid, and the outer surface of described pressure-reducing cushioning structure 8 is interval with multiple opening, often Being inserted with mobilizable barrier sheet 20 on individual opening, when opening and closing disc 6 needs to rotate when, it is slow that described barrier sheet 20 enters decompression Rushing structure 8 and be internally formed waste gas interception structure in pressure-reducing cushioning structure 8, waste gas need to be through multiple adjacent barrier sheets 20 composition Cavity could enter posterior catalysis restorer 7, thus temporary reduction exhaust gas pressure so that posterior opening and closing disc 6 can be suitable Profit rotates, it is to avoid exhaust gas leakage occurs.After posterior opening and closing disc 6 completes to rotate, described barrier sheet 20 detaches, and waste gas recovers former Some pressure, is rapidly introduced into posterior catalysis reduction passage.
When burning under the influence of various factors, the temperature of waste gas discharge is different, and different catalyst optimal processing temperature is different, Therefore arrange three kinds of different catalyst of operating temperature to reduce in passage in catalysis, cooperate with opening and closing disc 6, work as temperature sensing After device 5 detects EGT, according to its temperature, rotary opening closing dish 6 so that the through-hole alignment in opening and closing disc 6 adapts to this temperature The catalysis reduction passage of degree scope, covers remaining two kinds catalysis reduction passages, and waste gas is by maximum with the efficiency that its temperature matches The catalysis reduction passage changed, thus realize the maximization of exhaust treatment efficiency and effect.
Described high-temperature catalytic metallic carrier works under 400～600 DEG C of environment, and described middle temperature catalytic metal support is at 250～400 DEG C of rings Working under border, described low-temperature catalyzed metallic carrier works under 150～250 DEG C of environment.
Described high-temperature catalytic metallic carrier includes being loaded with WO3/TiO2The metallic carrier of catalyst, WO3/TiO2Under catalyst passes through Row step is carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: ammonia Water: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula half Footpath is 2.45 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metal carrier surface, Making the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, wherein microetch hole is total Area accounts for the 75% of the metal carrier surface gross area；(3) the metallic carrier roasting 5h in 900 DEG C after step (2) processes, Its surface is made to form oxide-film；(4) use sol-gel process at the surface-coated glass ceramic coating of described metallic carrier, composition For mol ratio SiO2: Al2O3=5:1；(5) butyl titanate, acetic acid and ethanol 1:8:5 in molar ratio stirring is obtained solution A, Ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B, solution B is quantitatively adding in A, is stirred vigorously and obtains 25wt.%WO3/TiO2 Catalyst colloidal sol, is immersed in 25wt.%WO by the metallic carrier of coating glass ceramic coating3/TiO230min in catalyst colloidal sol, Then slowly lifting out, dry at room temperature over night is placed in baking oven and dries at 60 DEG C, and at 550 DEG C, roasting 6h, obtains Load 25wt.%WO3WO3/TiO2The high-temperature catalytic metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more WO3/TiO2Catalyst.When the microetch hole gross area accounts for the 75% of the metal carrier surface gross area, Under 400～600 DEG C of environment, through laser ablation high-temperature catalytic metallic carrier compared to not through laser ablation high-temperature catalytic gold The catalytic efficiency belonging to carrier improves 33%.
At a temperature of 400～550 DEG C, the catalysis activity with temperature of high-temperature catalytic metallic carrier raises and strengthens, and conversion rate of NOx is above 80%, more than 92% when 500 DEG C, when temperature is higher than occurring downward trend after 500 DEG C, but NOx still has 65% turn when 600 DEG C Rate.
Described middle temperature catalytic metal support includes being loaded with CeO2/W25The metallic carrier of Ti catalyst, CeO2/W25Ti catalyst leads to Cross the following step to be carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: Ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula Radius is 2.45 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metallic carrier table Face so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, forms microetch hole, wherein microetch The hole gross area accounts for the 75% of the metal carrier surface gross area；(3) gold after cleaning of the metallic carrier after step (2) processes Belong to carrier roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at the table of described metallic carrier Topcoating covers glass ceramic coating, and composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and ethanol by mole Obtaining solution A than 1:8:5 stirring, ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B；(6) solution B is quantitatively adding in A, Being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting 4h at 600 DEG C, Obtain WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Ce (NO3)3·6H2O is dissolved in water and obtains nitre Acid cerium solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and is born after 1h is stirred at room temperature Carry the CeO of 10wt.%Ce2/W25Ti catalyst colloidal sol, is immersed in CeO by the metallic carrier of coating glass ceramic coating2/W25Ti 1h in catalyst colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, then at 550 DEG C Lower roasting 6h, obtains being loaded with CeO2/W25The middle temperature catalytic metal support of Ti catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more CeO2/W25Ti catalyst.When the microetch hole gross area accounts for the 60% of the metal carrier surface gross area, Under 250～400 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 30%.
At a temperature of 250～300 DEG C, the catalysis activity with temperature of middle temperature catalytic metal support raises and strengthens, and conversion rate of NOx is the highest In 60%, at a temperature of 250～300 DEG C, conversion rate of NOx reaches the highest, and close to 80%, after temperature is higher than 400 DEG C, middle temperature is urged The catalysis activity changing metallic carrier reduces rapidly.
Described low-temperature catalyzed metallic carrier includes being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier Cr of catalyst2O3-SO4 2-/TiO2Catalysis Agent is carried on metallic carrier through the following steps: (1) carries out alkali cleaning and removes surface and oil contaminant, soda-wash solution composition metallic carrier For water: ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, swashs Light spot radius is 2.45 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metal Carrier surface so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, forms microetch hole, its The middle microetch hole gross area accounts for the 75% of the metal carrier surface gross area；(3) metallic carrier after step (2) processes is in cleaning After metallic carrier roasting 5h in 900 DEG C so that it is surface formed oxide-film；(4) sol-gel process is used to carry at described metal The surface-coated glass ceramic coating of body, composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and ethanol 1:8:5 stirring in molar ratio obtains solution A, and ammonium paratungstate is dissolved in the sulfuric acid solution of 70% and obtains solution B, and solution B is quantitative Adding in A, wherein sulfate radical is SO with the mol ratio of titanium dioxide4 2-: TiO2=1:4；(6) solution B is quantitatively adding in A, Being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting 4h at 600 DEG C, Obtain WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Cr (NO3)3·9H2O is dissolved in water and obtains nitre Acid chromium solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and obtains after 1h is stirred at room temperature Cr2O3-SO4 2-/TiO2Catalyst colloidal sol, is immersed in Cr by the metallic carrier of coating glass ceramic coating2O3-SO4 2-/TiO2Catalyst is molten 1h in glue, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, roasting at 550 DEG C 6h, obtains being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more Cr2O3-SO4 2-/TiO2Catalyst.When the microetch hole gross area accounts for the 75% of the metal carrier surface gross area, Under 150～250 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 29%.
Load 10wt.%Ce low-temperature catalyzed metallic carrier when 150～250 DEG C, conversion rate of NOx along with temperature increase and by Edge up height, close to 100%.In 175～250 DEG C of temperature ranges, conversion rate of NOx is all more than 80%.
Compared to using single catalyst, the NOx ratio discharge used after the catalytic conversion system of the present invention in waste gas from 12.192g/kW h drops to 2.063g/kW h, and treatment effect significantly promotes.
Described micro particle catching unit 10 includes housing and polylith micro particle catching metallic carrier, under described micro particle catching metallic carrier passes through Row step process: taking quantitative chromic nitrate, cobalt nitrate and citric acid and be dissolved in deionized water, wherein chromium ion rubs with citric acid molecule That ratio is 1:1.5, and chromium ion concentration is 0.2mol/L.It is applied in after 80 DEG C of complex reaction 5h on micro particle catching metallic carrier, Described micro particle catching metallic carrier obtains final products after 600 DEG C of roasting 5h.In order to carry high catalytic activity further, in catalysis Agent surface has supported and has accounted for the precious metals pt that catalyst quality mark is 0.5%.Described final products mutually overlap after cutting into elongate Forming metal gauze, described metal gauze is vertically connected with the metal wire mesh filter 13 forming intensive porous
Described housing includes that shell body 11 and inner housing 12, described shell body 11 interval wrap up described inner housing 12 so that shell Form vacuum layer between body 11 and inner housing 12, keep the temperature of metal wire mesh filter 13, promote its passive combustive regeneration, Reduce the exhaust back pressure in particle trapper.Described inner housing 12 is divided into expansion, filtration fraction and constriction, described expansion Opening part and connect air inlet pipe, described constriction connects exhaustor, the external diameter of the constriction of wherein said inner housing 12 and aerofluxus Pipe external diameter diameter ratio is 2.5～4, and the angle of described inner housing 12 expansion is 80 °～100 °.
In particle trapper, the uniformity of flow velocity and particle concentration determines the height of particle trapper inner filtration body utilization rate, filtration Body regeneration period and the length in filtering bodies service life, in the actual application of particle trapper, the exhaust parameter of particle trapper (exhaust entrance speed) and structural parameters (angle of flare, diameter ratio) are to velocity flow profile and the uniformity of particle concentration distributions There is very important impact.
In the case of inlet flow rate (inlet velocity and inlet-duct area) is identical, diameter flows through expansion than little inner housing 12 Time, speed reduces less, and the eddy current effect of generation is less, almost without, but, less diameter ratio can make microgranule catch In storage, exhaust flow rate is higher, exhaust flow rate skewness, thus the microgranule in particle trapper during causing actual filtration Concentrate at the central axis of metal wire mesh filter 13, increase the weight of the load at metal wire mesh filter 13 central axis.When directly When footpath ratio is 2～4, the VELOCITY DISTRIBUTION in each cross section of particle trapper is more uniform, thus particle deposition in metal wire mesh filter 13 It is distributed the most uniform.Now in the case of same charge flow rate, particle trapper arresting efficiency is 96%.
The angle of flare is the least, and the mistake from air inlet pipe to expansion gets over smooth-going, and the angle of flare is the biggest, the most easily produces vortex, and Vortex is got over close to central axis, and therefore, selecting the angle of flare is 80 °～100 °, now in the case of same charge flow rate, Particle trapper arresting efficiency is 95%.
Refering to Fig. 4, described reducing agent feeding unit 14 includes solid urea holding vessel 19, metering rotor 18 and being sequentially connected with Heat resolve pipeline 16, described solid urea holding vessel 19 internal memory is placed with urea powder, and its lower surface is formed slopely with opening Cone structure.Described metering rotor 18 is cylindric, and its outer surface is interval with the pit accommodating urea powder.Described metering The cental axial position of rotor 18 connects actuating device, drives metering rotor 18 to rotate relative to solid urea holding vessel 19.Described The outer surface interval of metering rotor 18 is enclosed with the seal bootr 17 being fixed on described solid urea holding vessel 19, described seal bootr 17 opening parts being directed at described cone structure are provided with through hole, and described seal bootr 17 is directed at described heat resolve pipeline 16 and sets equally Having through hole, rotate metering rotor 18, the urea powder in solid urea holding vessel 19 enters in pit, is rotated further metering and turns Son 18, the pit equipped with urea powder turns to be directed at the through hole of described heat resolve pipeline 16, and urea powder drops, useless Air-blowing is moved urea powder and is entered heat resolve pipeline 16, and described heat resolve pipeline 16 is tortuous to be folded in microwave launcher 15, Urea powder decomposes generation ammonia and Carbimide. when microwave launcher 15 under the effect of microwave, and the steam in waste gas can Make Carbimide. decompose, thus produce ammonia.
In being embodied as, described pit is the hemispherical of a diameter of 5mm.
Embodiment five
Refering to Fig. 1, the heat-recovering energy-saving device of high-temperature tail gas, including vent gas treatment part, described vent gas treatment part includes Control unit, reducing agent feeding unit 14, catalytic reduction unit 3, micro particle catching unit 10 and temperature sensor 5, described in urge Change reduction unit 3 to be connected by connecting pipe with described micro particle catching unit 10, and described connecting pipe is provided with branch road and connects institute State reducing agent feeding unit 14.Described control unit controls micro particle catching unit 10, reducing agent feeding unit 14, catalysis respectively Reduction unit 3 and temperature sensor 5.Described catalytic reduction unit 3 air inlet one end is located in described temperature sensor 5.
Described catalytic reduction unit 3 includes rotary shaft 2, air inlet pipe 4 and the exhaustor 9 of connection air inlet pipe 4.Described rotary shaft 2 extend across air inlet pipe 4 and exhaustor 9, the two ends of described rotary shaft 2 along the direction, axis of air inlet pipe 4, exhaustor 9 Connecting has motor 1, described motor 1 that rotary shaft 2 can be driven to rotate.Be arranged in sequence with in described rotary shaft 2 multiple can be around rotation The cylindrical catalysis restorer 7 that axle 2 rotates, the inside of described catalysis restorer 7 is interval with multiple urging along its length Change reduction passage, described recall reduction passage be divided into high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and low-temperature catalyzed go back Former passage.Being provided with spiral helicine high-temperature catalytic metallic carrier in described high-temperature catalytic reduction passage, the catalysis reduction of described middle temperature is logical It is provided with spiral helicine middle temperature catalytic metal support in road, is provided with spiral helicine low-temperature catalyzed in described low-temperature catalyzed reduction passage Metallic carrier.Described high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and the arrangement of low-temperature catalyzed reduction passage regularity.
Being additionally provided with opening and closing disc 6 in described catalysis restorer 7, described opening and closing disc 6 is positioned at one end of catalysis reduction channel inlet.Institute The surface stating opening and closing disc 6 is provided with the through hole of regular arrangement, and rotary opening closing dish 6, on described through-hole alignment catalysis restorer 7 High-temperature catalytic reduction passage, middle temperature catalysis reduction passage or low-temperature catalyzed reduction passage, cover remaining two kinds catalysis reduction passages, Waste gas enters this catalysis reduction passage by through hole and carries out the catalytic reduction reaction of correspondence.
One end of described catalysis restorer 7 air inlet is provided with movable pressure-reducing cushioning structure 8, refering to Fig. 2 and Fig. 3, described decompression Buffer structure 8 is the cylinder of hollow or discoid, and the outer surface of described pressure-reducing cushioning structure 8 is interval with multiple opening, often Being inserted with mobilizable barrier sheet 20 on individual opening, when opening and closing disc 6 needs to rotate when, it is slow that described barrier sheet 20 enters decompression Rushing structure 8 and be internally formed waste gas interception structure in pressure-reducing cushioning structure 8, waste gas need to be through multiple adjacent barrier sheets 20 composition Cavity could enter posterior catalysis restorer 7, thus temporary reduction exhaust gas pressure so that posterior opening and closing disc 6 can be suitable Profit rotates, it is to avoid exhaust gas leakage occurs.After posterior opening and closing disc 6 completes to rotate, described barrier sheet 20 detaches, and waste gas recovers former Some pressure, is rapidly introduced into posterior catalysis reduction passage.
When burning under the influence of various factors, the temperature of waste gas discharge is different, and different catalyst optimal processing temperature is different, Therefore arrange three kinds of different catalyst of operating temperature to reduce in passage in catalysis, cooperate with opening and closing disc 6, work as temperature sensing After device 5 detects EGT, according to its temperature, rotary opening closing dish 6 so that the through-hole alignment in opening and closing disc 6 adapts to this temperature The catalysis reduction passage of degree scope, covers remaining two kinds catalysis reduction passages, and waste gas is by maximum with the efficiency that its temperature matches The catalysis reduction passage changed, thus realize the maximization of exhaust treatment efficiency and effect.
Described high-temperature catalytic metallic carrier works under 400～600 DEG C of environment, and described middle temperature catalytic metal support is at 250～400 DEG C of rings Working under border, described low-temperature catalyzed metallic carrier works under 150～250 DEG C of environment.
Described high-temperature catalytic metallic carrier includes being loaded with WO3/TiO2The metallic carrier of catalyst, WO3/TiO2Under catalyst passes through Row step is carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: ammonia Water: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula half Footpath is 2.50 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metal carrier surface, Making the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, wherein microetch hole is total Area accounts for the 80% of the metal carrier surface gross area；(3) the metallic carrier roasting 5h in 900 DEG C after step (2) processes, Its surface is made to form oxide-film；(4) use sol-gel process at the surface-coated glass ceramic coating of described metallic carrier, composition For mol ratio SiO2: Al2O3=5:1；(5) butyl titanate, acetic acid and ethanol 1:8:5 in molar ratio stirring is obtained solution A, Ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B, solution B is quantitatively adding in A, is stirred vigorously and obtains 25wt.%WO3/TiO2 Catalyst colloidal sol, is immersed in 25wt.%WO by the metallic carrier of coating glass ceramic coating3/TiO230min in catalyst colloidal sol, Then slowly lifting out, dry at room temperature over night is placed in baking oven and dries at 60 DEG C, and at 600 DEG C, roasting 5h, obtains Load 25wt.%WO3WO3/TiO2The high-temperature catalytic metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more WO3/TiO2Catalyst.When the microetch hole gross area accounts for the 80% of the metal carrier surface gross area, Under 400～600 DEG C of environment, through laser ablation high-temperature catalytic metallic carrier compared to not through laser ablation high-temperature catalytic gold The catalytic efficiency belonging to carrier improves 32%.
At a temperature of 400～550 DEG C, the catalysis activity with temperature of high-temperature catalytic metallic carrier raises and strengthens, and conversion rate of NOx is above 80%, more than 92% when 500 DEG C, when temperature is higher than occurring downward trend after 500 DEG C, but NOx still has 65% turn when 600 DEG C Rate.
Described middle temperature catalytic metal support includes being loaded with CeO2/W25The metallic carrier of Ti catalyst, CeO2/W25Ti catalyst leads to Cross the following step to be carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: Ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula Radius is 2.50 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metallic carrier table Face so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, forms microetch hole, wherein microetch The hole gross area accounts for the 80% of the metal carrier surface gross area；(3) gold after cleaning of the metallic carrier after step (2) processes Belong to carrier roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at the table of described metallic carrier Topcoating covers glass ceramic coating, and composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and ethanol by mole Obtaining solution A than 1:8:5 stirring, ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B；(6) solution B is quantitatively adding in A, Being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting 4h at 600 DEG C, Obtain WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Ce (NO3)3·6H2O is dissolved in water and obtains nitre Acid cerium solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and is born after 1h is stirred at room temperature Carry the CeO of 10wt.%Ce2/W25Ti catalyst colloidal sol, is immersed in CeO by the metallic carrier of coating glass ceramic coating2/W25Ti 1h in catalyst colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, then at 600 DEG C Lower roasting 5h, obtains being loaded with CeO2/W25The middle temperature catalytic metal support of Ti catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more CeO2/W25Ti catalyst.When the microetch hole gross area accounts for the 60% of the metal carrier surface gross area, Under 250～400 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 32%.
At a temperature of 250～300 DEG C, the catalysis activity with temperature of middle temperature catalytic metal support raises and strengthens, and conversion rate of NOx is the highest In 60%, at a temperature of 250～300 DEG C, conversion rate of NOx reaches the highest, and close to 80%, after temperature is higher than 400 DEG C, middle temperature is urged The catalysis activity changing metallic carrier reduces rapidly.
Described low-temperature catalyzed metallic carrier includes being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst, Cr2O3-SO4 2-/TiO2Urge Agent is carried on metallic carrier through the following steps: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution becomes It is divided into water: ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilize wavelength for 532nm, pulse width be 500ps～50ns, Laser facula radius is 2.50 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after gold Belong to carrier surface so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, Wherein the microetch hole gross area accounts for the 80% of the metal carrier surface gross area；(3) metallic carrier after step (2) processes is in by clear Metallic carrier after washing is roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at described metal The surface-coated glass ceramic coating of carrier, composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and second Alcohol 1:8:5 in molar ratio stirring obtains solution A, and ammonium paratungstate is dissolved in the sulfuric acid solution of 70% and obtains solution B, and solution B is fixed Amount adds in A, and wherein sulfate radical is SO with the mol ratio of titanium dioxide4 2-: TiO2=1:4；(6) solution B is quantitatively adding A In, it being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting at 600 DEG C 4h, obtains WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Cr (NO3)3·9H2O is dissolved in water and obtains To chromium nitrate solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and obtains after 1h is stirred at room temperature To Cr2O3-SO4 2-/TiO2Catalyst colloidal sol, is immersed in Cr by the metallic carrier of coating glass ceramic coating2O3-SO4 2-/TiO2Catalyst 1h in colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, roasts at 600 DEG C Burn 5h, obtain being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst.
The microetch hole of metal carrier surface can greatly increase the total surface area of metallic carrier, exposes bigger surface area and forms oxidation Film, thus load more Cr2O3-SO4 2-/TiO2Catalyst.When the microetch hole gross area accounts for the 80% of the metal carrier surface gross area, Under 150～250 DEG C of environment, the high-temperature catalytic metallic carrier through laser ablation is urged compared to not high temperature through laser ablation The catalytic efficiency changing metallic carrier improves 28%.
Load 10wt.%Ce low-temperature catalyzed metallic carrier when 150～250 DEG C, conversion rate of NOx along with temperature increase and by Edge up height, close to 100%.In 175～250 DEG C of temperature ranges, conversion rate of NOx is all more than 80%.
Compared to using single catalyst, the NOx ratio discharge used after the catalytic conversion system of the present invention in waste gas from 12.192g/kW h drops to 2.089g/kW h, and treatment effect significantly promotes.
Described micro particle catching unit 10 includes housing and polylith micro particle catching metallic carrier, under described micro particle catching metallic carrier passes through Row step process: taking quantitative chromic nitrate, cobalt nitrate and citric acid and be dissolved in deionized water, wherein chromium ion rubs with citric acid molecule That ratio is 1:1.5, and chromium ion concentration is 0.2mol/L.It is applied in after 80 DEG C of complex reaction 5h on micro particle catching metallic carrier, Described micro particle catching metallic carrier obtains final products after 600 DEG C of roasting 5h.In order to carry high catalytic activity further, in catalysis Agent surface has supported and has accounted for the precious metals pt that catalyst quality mark is 0.5%.Described final products mutually overlap after cutting into elongate Forming metal gauze, described metal gauze is vertically connected with the metal wire mesh filter 13 forming intensive porous.
Described housing includes that shell body 11 and inner housing 12, described shell body 11 interval wrap up described inner housing 12 so that shell Form vacuum layer between body 11 and inner housing 12, keep the temperature of metal wire mesh filter 13, promote its passive combustive regeneration, Reduce the exhaust back pressure in particle trapper.Described inner housing 12 is divided into expansion, filtration fraction and constriction, described expansion Opening part and connect air inlet pipe, described constriction connects exhaustor, the external diameter of the constriction of wherein said inner housing 12 and aerofluxus Pipe external diameter diameter ratio is 2.5～4, and the angle of described inner housing 12 expansion is 80 °～100 °.
In particle trapper, the uniformity of flow velocity and particle concentration determines the height of particle trapper inner filtration body utilization rate, filtration Body regeneration period and the length in filtering bodies service life, in the actual application of particle trapper, the exhaust parameter of particle trapper (exhaust entrance speed) and structural parameters (angle of flare, diameter ratio) are to velocity flow profile and the uniformity of particle concentration distributions There is very important impact.
In the case of inlet flow rate (inlet velocity and inlet-duct area) is identical, diameter flows through expansion than little inner housing 12 Time, speed reduces less, and the eddy current effect of generation is less, almost without, but, less diameter ratio can make microgranule catch In storage, exhaust flow rate is higher, exhaust flow rate skewness, thus the microgranule in particle trapper during causing actual filtration Concentrate at the central axis of metal wire mesh filter 13, increase the weight of the load at metal wire mesh filter 13 central axis.When directly When footpath ratio is 2～4, the VELOCITY DISTRIBUTION in each cross section of particle trapper is more uniform, thus particle deposition in metal wire mesh filter 13 It is distributed the most uniform.Now in the case of same charge flow rate, particle trapper arresting efficiency is 96%.
The angle of flare is the least, and the mistake from air inlet pipe to expansion gets over smooth-going, and the angle of flare is the biggest, the most easily produces vortex, and Vortex is got over close to central axis, and therefore, selecting the angle of flare is 80 °～100 °, now in the case of same charge flow rate, Particle trapper arresting efficiency is 95%.
Refering to Fig. 4, described reducing agent feeding unit 14 includes solid urea holding vessel 19, metering rotor 18 and being sequentially connected with Heat resolve pipeline 16, described solid urea holding vessel 19 internal memory is placed with urea powder, and its lower surface is formed slopely with opening Cone structure.Described metering rotor 18 is cylindric, and its outer surface is interval with the pit accommodating urea powder.Described metering The cental axial position of rotor 18 connects actuating device, drives metering rotor 18 to rotate relative to solid urea holding vessel 19.Described The outer surface interval of metering rotor 18 is enclosed with the seal bootr 17 being fixed on described solid urea holding vessel 19, described seal bootr 17 opening parts being directed at described cone structure are provided with through hole, and described seal bootr 17 is directed at described heat resolve pipeline 16 and sets equally Having through hole, rotate metering rotor 18, the urea powder in solid urea holding vessel 19 enters in pit, is rotated further metering and turns Son 18, the pit equipped with urea powder turns to be directed at the through hole of described heat resolve pipeline 16, and urea powder drops, useless Air-blowing is moved urea powder and is entered heat resolve pipeline 16, and described heat resolve pipeline 16 is tortuous to be folded in microwave launcher 15, Urea powder decomposes generation ammonia and Carbimide. when microwave launcher 15 under the effect of microwave, and the steam in waste gas can Make Carbimide. decompose, thus produce ammonia.
In being embodied as, described pit is the hemispherical of a diameter of 5mm.
Last it should be noted that, above example is only in order to illustrate technical scheme, rather than to scope Restriction, although having made to explain to the present invention with reference to preferred embodiment, it will be understood by those within the art that, Technical scheme can be modified or equivalent, without deviating from the spirit and scope of technical solution of the present invention.

Claims (5)

1. the heat-recovering energy-saving device of high-temperature tail gas, it is characterised in that include vent gas treatment part, described vent gas treatment part Including control unit, reducing agent feeding unit, catalytic reduction unit, micro particle catching unit and temperature sensor, described catalysis is also Former unit is connected by connecting pipe with described micro particle catching unit, and described connecting pipe is provided with branch road and connects described reducing agent Feeding unit；Described control unit controls micro particle catching unit, reducing agent feeding unit, catalytic reduction unit and temperature respectively and passes Sensor；Described catalytic reduction unit air inlet one end is located in described temperature sensor；Described catalytic reduction unit includes rotary shaft, enters Trachea and the exhaustor of connection air inlet pipe, described rotary shaft extends across air inlet along the direction, axis of air inlet pipe, exhaustor Pipe and exhaustor, the two ends of described rotary shaft connect motor；It is arranged in sequence with in described rotary shaft and multiple can rotate around rotary shaft Cylindrical catalysis restorer, the inside of described catalysis restorer is interval with multiple catalysis reduction passage along its length, Described recall reduction passage is divided into high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and low-temperature catalyzed reduction passage；Described It is provided with spiral helicine high-temperature catalytic metallic carrier in high-temperature catalytic reduction passage, in described middle temperature catalysis reduction passage, is provided with spiral shell The middle temperature catalytic metal support of rotation shape, is provided with spiral helicine low-temperature catalyzed metallic carrier, institute in described low-temperature catalyzed reduction passage State high-temperature catalytic reduction passage, middle temperature catalysis reduction passage and the arrangement of low-temperature catalyzed reduction passage regularity；
Being additionally provided with opening and closing disc in described catalysis restorer, described opening and closing disc is positioned at one end of catalysis reduction channel inlet；Described opening and closing The surface of dish is provided with the through hole of regular arrangement, rotary opening closing dish, the high-temperature catalytic reduction on described through-hole alignment catalysis restorer Passage, middle temperature catalysis reduction passage or low-temperature catalyzed reduction passage, cover remaining two kinds catalysis reduction passages, and waste gas passes through through hole Enter this catalysis reduction passage and carry out the catalytic reduction reaction of correspondence；
One end of described catalysis restorer air inlet is provided with movable pressure-reducing cushioning structure, and described pressure-reducing cushioning structure is the circle of hollow Cylindricality or discoid, the outer surface of described pressure-reducing cushioning structure is interval with multiple opening, each opening is inserted with mobilizable every Catch, when opening and closing disc needs to rotate when, described barrier sheet enters pressure-reducing cushioning structure and is formed in pressure-reducing cushioning inside configuration Waste gas interception structure；
Described high-temperature catalytic metallic carrier works under 400～600 DEG C of environment, and described middle temperature catalytic metal support is at 250～400 DEG C of rings Working under border, described low-temperature catalyzed metallic carrier works under 150～250 DEG C of environment；
Described high-temperature catalytic metallic carrier includes being loaded with WO3/TiO2The metallic carrier of catalyst, WO3/TiO2Under catalyst passes through Row step is carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: ammonia Water: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula half Footpath is 2.25 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metal carrier surface, Making the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, wherein microetch hole is total Area accounts for the 60% of the metal carrier surface gross area；(3) the metallic carrier roasting 5h in 900 DEG C after step (2) processes, Its surface is made to form oxide-film；(4) use sol-gel process at the surface-coated glass ceramic coating of described metallic carrier, composition For mol ratio SiO2: Al2O3=5:1；(5) butyl titanate, acetic acid and ethanol 1:8:5 in molar ratio stirring is obtained solution A, Ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B, solution B is quantitatively adding in A, is stirred vigorously and obtains 25wt.%WO3/TiO2 Catalyst colloidal sol, is immersed in 25wt.%WO by the metallic carrier of coating glass ceramic coating3/TiO230min in catalyst colloidal sol, Then slowly lifting out, dry at room temperature over night is placed in baking oven and dries at 60 DEG C, and at 500 DEG C, roasting 5h, obtains Load 25wt.%WO3WO3/TiO2The high-temperature catalytic metallic carrier of catalyst；
Described middle temperature catalytic metal support includes being loaded with CeO2/W25The metallic carrier of Ti catalyst, CeO2/W25Ti catalyst leads to Cross the following step to be carried on metallic carrier: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution composition is water: Ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilizing wavelength for 532nm, pulse width is 500ps～50ns, laser facula Radius is 2.25 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after metallic carrier table Face so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, forms microetch hole, wherein microetch The hole gross area accounts for the 60% of the metal carrier surface gross area；(3) gold after cleaning of the metallic carrier after step (2) processes Belong to carrier roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at the table of described metallic carrier Topcoating covers glass ceramic coating, and composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and ethanol by mole Obtaining solution A than 1:8:5 stirring, ammonium paratungstate is dissolved in oxalic acid solution and obtains solution B；(6) solution B is quantitatively adding in A, Being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting 4h at 600 DEG C, Obtain WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Ce (NO3)3·6H2O is dissolved in water and obtains nitre Acid cerium solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and is born after 1h is stirred at room temperature Carry the CeO of 10wt.%Ce2/W25Ti catalyst colloidal sol, is immersed in CeO by the metallic carrier of coating glass ceramic coating2/W25Ti 1h in catalyst colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, then at 500 DEG C Lower roasting 5h, obtains being loaded with CeO2/W25The middle temperature catalytic metal support of Ti catalyst；
Described low-temperature catalyzed metallic carrier includes being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst, Cr2O3-SO4 2-/TiO2Urge Agent is carried on metallic carrier through the following steps: (1) carries out alkali cleaning and removes surface and oil contaminant metallic carrier, and soda-wash solution becomes It is divided into water: ammonia: hydrogen peroxide=5:1:1 (volume ratio)；(2) utilize wavelength for 532nm, pulse width be 500ps～50ns, Laser facula radius is 2.25 μm, and energy density scope is 4 × 107～12 × 108W/cm2Short-pulse laser irradiate clean after gold Belong to carrier surface so that the metal carrier surface local heating after cleaning, melted, vaporization and phase transformation blast, form microetch hole, Wherein the microetch hole gross area accounts for the 60% of the metal carrier surface gross area；(3) metallic carrier after step (2) processes is in by clear Metallic carrier after washing is roasting 5h in 900 DEG C so that it is surface forms oxide-film；(4) use sol-gel process at described metal The surface-coated glass ceramic coating of carrier, composition is mol ratio SiO2: Al2O3=5:1；(5) by butyl titanate, acetic acid and second Alcohol 1:8:5 in molar ratio stirring obtains solution A, and ammonium paratungstate is dissolved in the sulfuric acid solution of 70% and obtains solution B, and solution B is fixed Amount adds in A, and wherein sulfate radical is SO with the mol ratio of titanium dioxide4 2-: TiO2=1:4；(6) solution B is quantitatively adding A In, it being stirred vigorously and obtain colloidal sol, room temperature is placed and is obtained 110 DEG C of drying in thermostatic drying chamber after xerogel, then roasting at 600 DEG C 4h, obtains WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst；(7) by quantitative Cr (NO3)3·9H2O is dissolved in water and obtains To chromium nitrate solution, then by WO3Weight/mass percentage composition is the WO of 25%3/TiO2Catalyst is immersed, and obtains after 1h is stirred at room temperature To Cr2O3-SO4 2-/TiO2Catalyst colloidal sol, is immersed in Cr by the metallic carrier of coating glass ceramic coating2O3-SO4 2-/TiO2Catalyst 1h in colloidal sol, then slowly lifts out, and dry at room temperature over night is placed in baking oven and dries at 60 DEG C, roasts at 500 DEG C Burn 5h, obtain being loaded with Cr2O3-SO4 2-/TiO2The metallic carrier of catalyst.
The heat-recovering energy-saving device of high-temperature tail gas the most according to claim 1, it is characterised in that described micro particle catching list Unit includes housing and polylith micro particle catching metallic carrier, and described micro particle catching metallic carrier processes through the following step: take quantitative nitre Acid chromium, cobalt nitrate and citric acid be dissolved in deionized water, and wherein chromium ion and citric acid molecule mol ratio are 1:1.5, chromium ion Concentration is 0.2mol/L；Being applied in after 80 DEG C of complex reaction 5h on micro particle catching metallic carrier, described micro particle catching metal carries Body obtains final products after 600 DEG C of roasting 5h；After described final products cut into elongate, mutually overlap joint forms metal gauze, Described metal gauze is vertically connected with the metal wire mesh filter forming intensive porous；Described housing includes shell body and inner housing, institute State shell body interval and wrap up described inner housing, between shell body and inner housing, form vacuum layer；Described inner housing be divided into expansion, Filtration fraction and constriction, described expansion connects air inlet pipe, and described constriction connects exhaustor, wherein said inner shell The external diameter of the constriction of body is 2.5～4 with exhaustor external diameter diameter ratio, and the angle of described inner housing expansion is 80 ° ～100 °.
The heat-recovering energy-saving device of high-temperature tail gas the most according to claim 2, it is characterised in that described metallic carrier table Face is supported with and accounts for the precious metals pt that catalyst quality mark is 0.5%.
The heat-recovering energy-saving device of high-temperature tail gas the most according to claim 1 and 2, it is characterised in that described reducing agent Feeding unit includes solid urea holding vessel, metering rotor and the heat resolve pipeline being sequentially connected with, described solid urea holding vessel Internal memory is placed with urea powder, and its lower surface is formed slopely the cone structure with opening；Described metering rotor is cylindric, outside it Spaced surface is provided with the pit accommodating urea powder；The cental axial position of described metering rotor connects actuating device, drives metering to turn Son rotates relative to solid urea holding vessel；The outer surface interval of described metering rotor is enclosed with is fixed on the storage of described solid urea Seal bootr on tank, described seal bootr is directed at the opening part of described cone structure and is provided with through hole, and described seal bootr is directed at described heating Decomposing and be again provided with through hole at pipeline, rotate metering rotor, the urea powder in solid urea holding vessel enters in pit, continues Rotating metering rotor, the pit equipped with urea powder turns to be directed at the through hole of described heat resolve pipeline；Described heat resolve Pipeline is tortuous to be folded in microwave launcher.
The heat-recovering energy-saving device of high-temperature tail gas the most according to claim 4, it is characterised in that described pit is diameter Hemispherical for 5mm.
CN201610380510.5A 2016-06-01 2016-06-01 High-temperature tail gas heat recovery energy-saving device Pending CN105927327A (en)

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CN114542245A (en) * 2022-01-24 2022-05-27 安徽理工大学 Motor vehicle tail gas degradation treatment equipment
CN115045932A (en) * 2022-06-30 2022-09-13 湖南金天铝业高科技股份有限公司 Preparation method of ventilated brake disc
CN115432848A (en) * 2022-07-20 2022-12-06 电子科技大学 Iron-based efficient stable catalytic reaction device for nitrate radical reduction

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