CN206404591U - Granule materials Industrial Boiler flue gas denitrification system - Google Patents

Granule materials Industrial Boiler flue gas denitrification system Download PDF

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CN206404591U
CN206404591U CN201621440735.7U CN201621440735U CN206404591U CN 206404591 U CN206404591 U CN 206404591U CN 201621440735 U CN201621440735 U CN 201621440735U CN 206404591 U CN206404591 U CN 206404591U
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flue gas
heat storage
denitration
heat
discharging pipe
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吴道洪
宋敏洁
钟贵全
陈珊
王志军
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Shenwu Technology Group Corp Co Ltd
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Shenwu Technology Group Corp Co Ltd
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Abstract

The utility model discloses granule materials Industrial Boiler flue gas denitrification system, including:Smoke discharging pipe, heat storage, denitration heat storage, cyclone separator, desulfurizer and chimney, wherein, smoke discharging pipe is connected with the exhanst gas outlet of granule materials Industrial Boiler, and reductant nozzle is provided with smoke discharging pipe;Heat storage is arranged in smoke discharging pipe and positioned at the downstream of reductant nozzle, and heat storage is suitable to advance Mist heat recovering;Denitration heat storage is arranged in smoke discharging pipe and positioned at the downstream of heat storage, and denitration heat storage is suitable to Mist heat recovering and carries out denitration process to flue gas;Cyclone separator is connected with the gas outlet of smoke discharging pipe, and cyclone separator is suitable to carry out dust removal process to flue gas;Desulfurizer is connected with cyclone separator, and desulfurizer is suitable to remove the oxysulfide in flue gas;And chimney is connected with desulfurizer.Denitration reaction can be carried out without dedusting using the denitrating system flue gas, simple to operate, denitration efficiency is high.

Description

Granule materials Industrial Boiler flue gas denitrification system
Technical field
The utility model belongs to denitrating flue gas field, specifically, and the utility model is related to granule materials Industrial Boiler cigarette Gas denitrating system.
Background technology
With developing rapidly for China's economy, the fossil fuel equal energy source such as natural gas, oil and coal obtains more extensive Using so that environmental problem is increasingly serious, therefore causes a series of environmental problems, such as acid rain, depletion of the ozone layer, greenhouse effects Deng so that our living environment is further severe.Energy resource structure of the China based on coal determine China nitrogen oxides and Sulfur oxide emission is constantly in high situation, the discharge of a large amount of pollution gas so that environmental problem is increasingly tight It is high, the production and living of our people are not only had a strong impact on, and be unfavorable for the sustainable development of China's economy.Therefore, environment is asked Topic has obtained national increasing concern.
The NO of mankind's activity dischargeXMore than 90% comes from fuel combustion process.It is various industrial furnaces, Civil energy-saving cooking stove, motor-driven During high temperature combustion of fuel in car and other internal combustion engines, the nitrogen substance oxidation generation NO in fuelX, participate in burning air or N in oxygen-enriched air2And O2Also NO can be generatedX.From the point of view of energy resource structure, during the primary energy and power generation energy resource of China are constituted, coal Occupy absolute leading position.And the coal of China more than 80% directly burns, particularly for power station, Industrial Boiler And in civil boiler.Therefore, in considerably long period, the NO in flue gasXDischarge is to cause China air NOXOne master of pollution Factor is wanted, the NO of fixed source emission how is reducedXIt is the important topic that atmospheric environment is administered.
Denitrating flue gas belongs to burning post-processing technology, and the smoke evacuation system of many developed countries all needs to install denitrating flue gas dress Put.Denitration method for flue gas is more, but obtains the only selective catalytic reduction and selectivity of a large amount of commercial Applications at present and non-urge Change reducing process, other method is in experimental study stage or pilot scale stage at present.
Utility model content
The utility model is intended at least solve one of technical problem in correlation technique to a certain extent.Therefore, this reality It is to propose granule materials Industrial Boiler flue gas denitrification system with a new purpose, the denitrating system uses and has accumulation of heat concurrently With the denitration heat storage of denitration function, surface is smooth, wear-resisting, and technique is simple and feasible, and it is anti-that flue gas can carry out denitration without dedusting Should, simple to operate, denitration efficiency is high.
According to one side of the present utility model, the utility model proposes granule materials Industrial Boiler denitrating flue gas system System, including:
Smoke discharging pipe, the smoke discharging pipe is connected with the exhanst gas outlet of granule materials Industrial Boiler, on the smoke discharging pipe It is provided with reductant nozzle;
Heat storage, the heat storage is arranged in the smoke discharging pipe and positioned at the downstream of the reductant nozzle, described Heat storage is suitable to advance Mist heat recovering;
Denitration heat storage, the denitration heat storage is arranged in the smoke discharging pipe and positioned at the downstream of the heat storage, The denitration heat storage is suitable to Mist heat recovering and carries out denitration process to flue gas;
Cyclone separator, the cyclone separator is connected with the gas outlet of the smoke discharging pipe, the cyclonic separation Device is suitable to carry out dust removal process to flue gas;
Desulfurizer, the desulfurizer is connected with the cyclone separator, and the desulfurizer is suitable to remove flue gas In oxysulfide;And
Chimney, the chimney is connected with the desulfurizer.
Thus, using the granule materials Industrial Boiler flue gas denitrification system of the utility model embodiment, by flue gas in smoke evacuation Mixed in advance with reducing agent in pipeline, recycle heat storage to occur reduction reaction in denitration heat storage after being cooled, Denitration process is carried out to flue gas.Denitration heat storage is the heat storage of supported catalyst, has the function of accumulation of heat and denitration concurrently, by de- The accumulation of heat effect of nitre heat storage, can make catalyst flue gas and reducing agent in denitration heat storage stable in optimal temperature In the range of carry out denitration reaction, denitration efficiency is high.
In addition, can also be had according to the granule materials Industrial Boiler flue gas denitrification system of the utility model above-described embodiment The technical characteristic added as follows:
In the utility model, the reductant nozzle is atomizer.
In the utility model, the atomizer is ammonia atomization nozzle or urea atomizer.
In the utility model, the heat storage has fuel gas entrance and the outlet of hot fuel gas, and the hot fuel gas goes out Mouth is connected with the fuel inlet of the granule materials Industrial Boiler.
In the utility model, the denitration heat storage is spherical, strip or honeycomb ceramics shape.
In the utility model, the denitration heat storage is that cross section is the cellular of sector, and the fan-shaped angle is 60 °, radius is 200mm, and through hole section is square on the denitration heat storage, and size is 20mm × 20mm.
In the utility model, through hole section is circle on the denitration heat storage, and radius is 20mm.
Brief description of the drawings
Fig. 1 is the structural representation of the granule materials Industrial Boiler flue gas denitrification system according to the utility model one embodiment Figure.
Fig. 2 is the granule materials Industrial Boiler flue gas denitrification system using the utility model one embodiment to granule materials Industrial Boiler flue gas carries out the method flow diagram of denitration process.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model Limitation.
According to one side of the present utility model, the utility model proposes granule materials Industrial Boiler denitrating flue gas system System, the granule materials Industrial Boiler flue gas denitrification system of the utility model embodiment is described below with reference to Fig. 1, including:Smoke exhaust pipe Road 100, heat storage 200, denitration heat storage 300, cyclone separator 400, desulfurizer 500 and chimney 600.
Wherein, smoke discharging pipe 100 is connected with the exhanst gas outlet of granule materials Industrial Boiler, is provided with smoke discharging pipe 100 Reductant nozzle 110;Heat storage 200 is arranged in smoke discharging pipe 100 and positioned at the downstream of reductant nozzle 110, heat storage 200 Suitable for advance Mist heat recovering;Denitration heat storage 300 is arranged in smoke discharging pipe 100 and positioned at the downstream of heat storage 200, is taken off Nitre heat storage 300 is suitable to Mist heat recovering and carries out denitration process to flue gas;Cyclone separator 400 and smoke discharging pipe 100 Gas outlet be connected, cyclone separator 400 be suitable to flue gas carry out dust removal process;Desulfurizer 500 and cyclone separator 400 are connected, and desulfurizer 500 is suitable to remove the oxysulfide in flue gas;And chimney 600 is connected with desulfurizer 500.
Thus, using the granule materials Industrial Boiler flue gas denitrification system of the utility model embodiment, by flue gas in smoke evacuation Mixed in advance with reducing agent in pipeline, recycle heat storage to occur reduction reaction in denitration heat storage after being cooled, Denitration process is carried out to flue gas.Denitration heat storage is the heat storage of supported catalyst, has the function of accumulation of heat and denitration concurrently, by de- The accumulation of heat effect of nitre heat storage, can make catalyst flue gas and reducing agent in denitration heat storage stable in optimal temperature In the range of carry out denitration reaction, denitration efficiency is high.
The granule materials Industrial Boiler flue gas denitrification system of the utility model specific embodiment is described below in detail.
Smoke discharging pipe 100 has reductant nozzle 110
According to embodiment of the present utility model, smoke discharging pipe 100 is connected with the exhanst gas outlet of granule materials Industrial Boiler, row Reductant nozzle 110 is provided with smoke pipeline 100.Thus sprayed into first to from the flue gas discharged in granule materials Industrial Boiler Reducing agent.Specifically, granule materials Industrial Boiler flue gas is discharged into smoke discharging pipe 100, while from the reduction on smoke discharging pipe 100 Agent nozzle 110 sprays into reducing agent, flue gas is mixed with reducing agent, obtains mixed flue gas.
According to specific embodiment of the utility model, reductant nozzle is atomizer.Thus effervescent atomization technology is used, Using high pressure air or oxygen-enriched air as atomizing medium, it is small droplet, droplet to make the moment atomization that reducing agent sprays Grain can reach less than 40 μm, can be good at being well mixed with flue gas.
According to specific embodiment of the utility model, atomizer can be ammonia atomization nozzle or urea atomization spray Mouth.Thus spray into ammoniacal liquor into flue gas or urea is used as reducing agent.The oxide or metal in flue gas can effectively be reduced Alkali compounds.
Heat storage 200
According to embodiment of the present utility model, heat storage 200 is arranged in smoke discharging pipe 100 and positioned at reductant nozzle 110 downstream, heat storage 200 is suitable to advance Mist heat recovering.Thus mixed flue gas is made by the heat storage in flue, so as to Mixed flue gas is carried out to cool and recovery waste heat, to meet the temperature requirement of follow-up denitration process.
According to specific embodiment of the utility model, there is heat storage 200 fuel gas entrance 210 and hot fuel gas to export 220, hot fuel gas outlet 220 is connected with the fuel inlet of granule materials Industrial Boiler.Thus granule materials Industrial Boiler is utilized The high-temperature flue gas of interior generation is preheated to the fuel gas used in granule materials Industrial Boiler itself, and then improves heat energy synthesis profit With rate, energy consumption is reduced.
According to specific embodiment of the utility model, actual motion temperature in granule materials Industrial Boiler for 1000 DEG C- 1300 DEG C, its flue-gas temperature just discharged can reach more than 1000 degrees Celsius.Thus helping used in granule materials Industrial Boiler The combustion fuel such as air or oxygen-enriched air is preheated to 700-900 DEG C or so by using heat storage 200.And then take full advantage of particle The waste heat for the high-temperature flue gas that burning is produced, can effectively maintain the temperature in granule materials Industrial Boiler in material Industrial Boiler, Energy-efficient, energy utilization rate is high.
Denitration heat storage 300
According to embodiment of the present utility model, denitration heat storage 300 is arranged in smoke discharging pipe 100 and positioned at heat storage 200 downstream, denitration heat storage 300 is suitable to Mist heat recovering and carries out denitration process to flue gas.Thus, make by cooling Mixed flue gas is by denitration heat storage 300, so that reduction reaction removing nitrogen oxides occurs for catalytic mixing flue gas.
According to embodiment of the present utility model, denitration heat storage is spherical, strip or honeycomb ceramics shape.
According to embodiment of the present utility model, denitration heat storage is that cross section is the cellular of sector, and fan-shaped angle is 60 °, radius is that through hole section is square on 200mm, denitration heat storage, and size is 20mm × 20mm.
According to embodiment of the present utility model, through hole section can also be circle on denitration heat storage, and radius is 20mm.
According to specific embodiment of the utility model, the denitration heat storage includes inorganic powder, denitrating catalyst and added Plus agent, wherein, the load capacity of the inorganic powder is 50-100 mass %, and the load capacity of the denitrating catalyst is 5-40 matter Measure %, the load capacity of the additive is to contain enamel in 1-10 mass %, the additive.
According to specific embodiment of the utility model, denitration heat storage includes inorganic powder, denitrating catalyst and additive (including enamel), on the basis of heat storage total quality, the mass loading amount of inorganic powder is 50%~100%, denitration catalyst The mass loading amount of agent is 5~40%, and the mass loading amount of additive (including enamel) is 1~10%.Denitration heat storage will be urged Agent is carried on heat storage, is allowed to have concurrently the function of accumulation of heat and denitration, is acted on by the accumulation of heat of denitration heat storage, as needed It is arranged, the catalyst stabilization in denitration heat storage can be made to carry out denitration reaction, denitration effect in the range of optimal temperature Rate is high.
According to specific embodiment of the utility model, raw materials used granule materials Industrial Boiler can be anthracite, long flame The one or more such as coal, bituminous coal, Task-size Controlling is in below 6mm.Therefore, meeting while granule materials burning produces high-temperature flue gas Produced with dust, and as flue gas is discharged.By using the above-mentioned denitration heat storage for having accumulation of heat and denitration function concurrently, surface Smooth, wear-resisting, technique is simple and feasible, and flue gas can carry out denitration reaction without dedusting, simple to operate, and denitration efficiency is high.
According to specific embodiment of the utility model, the flue gas convection tube that burning is produced in granule materials Industrial Boiler After softened water in beam, temperature is reduced to after 700~1100 DEG C and is reduced to 400 through hold over system Mist heat recovering temperature~ Enter accumulation of heat denitration body after 700 DEG C, reduction reaction occurs while accumulation of heat, nitrogen oxides is reduced and removed.It is new according to this practicality The specific embodiment of type, the temperature that reduction reaction occurs in accumulation of heat denitration body for mixed flue gas is 350-650 degrees Celsius.Thus may be used Further to improve catalytic denitration reaction, removal of nitrogen oxide rate is improved.
According to specific example of the present utility model, in the presence of denitration heat storage, flue gas reclaims heat by accumulation of heat Reduction reaction occurs simultaneously, nitrogen oxides is removed, removal efficiency is up to more than 98%.Flue-gas temperature after accumulation of heat denitration is reduced to 65~75 DEG C, then enter after follow-up cyclone separator dedusting after the sulfide in flue gas desulfurization device, removing flue gas, it is right Outer discharge.Thus exhaust gas temperature is not only reduced, flue gas loss is reduced, nitrogen oxide emission, energy-efficient, ring is reduced Protect.
Cyclone separator 400, desulfurizer 500 and chimney 600
According to embodiment of the present utility model, cyclone separator 400 is connected with the gas outlet of smoke discharging pipe 100, whirlwind Separator 400 is suitable to carry out dust removal process to flue gas.Thus, the flue gas of removing nitrogen oxides is made to enter cyclone separator, with Just dust removal process is carried out.
According to embodiment of the present utility model, desulfurizer 500 is connected with cyclone separator 400, and desulfurizer 500 is fitted Oxysulfide in removing flue gas.Thus, the flue gas after dust removal process is entered desulfurizer and carry out desulfurization process, with Just it is purified rear flue gas.
According to embodiment of the present utility model, it is connected with desulfurizer 500.Thus flue gas after purification is discharged by chimney.
Understand the granule materials Industrial Boiler flue gas denitrification system of the utility model above-described embodiment for convenience, below it is right The method for carrying out denitration process to granule materials Industrial Boiler flue gas using the system is described in detail.
According to embodiment of the present utility model, this method includes:Granule materials Industrial Boiler flue gas is discharged into smoke discharging pipe, Reducing agent is sprayed into from the reductant nozzle on smoke discharging pipe simultaneously, flue gas is mixed with reducing agent, obtains mixed flue gas;Make mixing Flue gas is by the heat storage in flue, to carry out cooling and recovery waste heat to mixed flue gas;Make the mixed flue gas by cooling By denitration heat storage, so that reduction reaction removing nitrogen oxides occurs for catalytic mixing flue gas;Make the flue gas of removing nitrogen oxides Into cyclone separator, to carry out dust removal process;Make the flue gas after dust removal process enter desulfurizer to carry out at desulfurization Reason, to be purified rear flue gas;Flue gas after purification is discharged by chimney.
Thus, using the granule materials Industrial Boiler flue gas denitrification system of the utility model embodiment, by flue gas in smoke evacuation Mixed in advance with reducing agent in pipeline, recycle heat storage to occur reduction reaction in denitration heat storage after being cooled, Denitration process is carried out to flue gas.Denitration heat storage is the heat storage of supported catalyst, has the function of accumulation of heat and denitration concurrently, by de- The accumulation of heat effect of nitre heat storage, can make catalyst flue gas and reducing agent in denitration heat storage stable in optimal temperature In the range of carry out denitration reaction, denitration efficiency is high.
The granule materials Industrial Boiler denitrating flue gas side of the utility model specific embodiment is described in detail below with reference to Fig. 2 Method.
S100:Flue gas is mixed with reducing agent
According to embodiment of the present utility model, granule materials Industrial Boiler flue gas is discharged into smoke discharging pipe, while from smoke evacuation Reductant nozzle on pipeline sprays into reducing agent, flue gas is mixed with reducing agent, obtains mixed flue gas.
According to specific embodiment of the utility model, reductant nozzle is atomizer.Thus effervescent atomization technology is used, Using high pressure air or oxygen-enriched air as atomizing medium, it is small droplet, droplet to make the moment atomization that reducing agent sprays Grain can reach less than 40 μm, can be good at being well mixed with flue gas.
According to specific embodiment of the utility model, reducing agent can be ammoniacal liquor or urea, from there through ammonia atomization Nozzle or urea atomizer spray into ammoniacal liquor or urea into flue gas.The oxide or gold in flue gas can effectively be reduced Belong to alkali compounds.
S200:Cool and recovery waste heat
According to embodiment of the present utility model, make mixed flue gas by the heat storage in flue, to enter to mixed flue gas Row cooling and recovery waste heat, to meet the temperature requirement of follow-up denitration process.
According to embodiment of the present utility model, the above method be can further include, and air or oxygen-enriched air are led to The heat storage crossed after accumulation of heat is preheated, and is used for granule materials Industrial Boiler, air or richness by preheating as fuel The temperature of oxygen air is 700-900 degrees Celsius.Thus using the high-temperature flue gas produced in granule materials Industrial Boiler to particulate matter Fuel gas used in material Industrial Boiler itself is preheated, and then improves heat integration rate, reduces energy consumption.
According to specific embodiment of the utility model, actual motion temperature in granule materials Industrial Boiler for 1000 DEG C- 1300 DEG C, its flue-gas temperature just discharged can reach more than 1000 degrees Celsius.Thus helping used in granule materials Industrial Boiler The combustion fuel such as air or oxygen-enriched air is preheated to 700-900 DEG C or so by using heat storage 200.And then take full advantage of particle The waste heat for the high-temperature flue gas that burning is produced, can effectively maintain the temperature in granule materials Industrial Boiler in material Industrial Boiler, Energy-efficient, energy utilization rate is high.
S300:Reduction reaction removes nitrogen oxides
According to embodiment of the present utility model, make the mixed flue gas by cooling by denitration heat storage, it is mixed to be catalyzed Close flue gas and occur reduction reaction removing nitrogen oxides.
According to specific embodiment of the utility model, raw materials used granule materials Industrial Boiler can be anthracite, long flame The one or more such as coal, bituminous coal, Task-size Controlling is in below 6mm.Therefore, meeting while granule materials burning produces high-temperature flue gas Produced with dust, and as flue gas is discharged.By using the above-mentioned denitration heat storage for having accumulation of heat and denitration function concurrently, surface Smooth, wear-resisting, technique is simple and feasible, and flue gas can carry out denitration reaction without dedusting, simple to operate, and denitration efficiency is high.
According to specific embodiment of the utility model, the flue gas convection tube that burning is produced in granule materials Industrial Boiler After softened water in beam, temperature is reduced to after 700~1100 DEG C and is reduced to 400 through hold over system Mist heat recovering temperature~ Enter accumulation of heat denitration body after 700 DEG C, reduction reaction occurs while accumulation of heat, nitrogen oxides is reduced and removed.It is new according to this practicality The specific embodiment of type, the temperature that reduction reaction occurs in accumulation of heat denitration body for mixed flue gas is 350-650 degrees Celsius.Thus may be used Further to improve catalytic denitration reaction, removal of nitrogen oxide rate is improved.
According to specific example of the present utility model, in the presence of denitration heat storage, flue gas reclaims heat by accumulation of heat Reduction reaction occurs simultaneously, nitrogen oxides is removed, removal efficiency is up to more than 98%.Flue-gas temperature after accumulation of heat denitration is reduced to 65~75 DEG C, then enter after follow-up cyclone separator dedusting after the sulfide in flue gas desulfurization device, removing flue gas, it is right Outer discharge.Thus exhaust gas temperature is not only reduced, flue gas loss is reduced, nitrogen oxide emission, energy-efficient, ring is reduced Protect.
According to specific example of the present utility model, denitration heat storage is by heat storage and the denitration catalyst being supported on heat storage Agent is constituted, and the load capacity of denitrating catalyst is 5-40 mass %.
According to embodiment of the present utility model, denitration heat storage is spherical, strip or honeycomb ceramics shape.
According to embodiment of the present utility model, denitration heat storage is that cross section is the cellular of sector, and fan-shaped angle is 60 °, radius is that through hole section is square on 200mm, denitration heat storage, and size is 20mm × 20mm.
According to embodiment of the present utility model, through hole section can also be circle on denitration heat storage, and radius is 20mm.
According to specific embodiment of the utility model, the denitration heat storage includes inorganic powder, denitrating catalyst and added Plus agent, wherein, the load capacity of the inorganic powder is 50-100 mass %, and the load capacity of the denitrating catalyst is 5-40 matter Measure %, the load capacity of the additive is to contain enamel in 1-10 mass %, the additive.
According to specific embodiment of the utility model, denitration heat storage includes inorganic powder, denitrating catalyst and additive (including enamel), on the basis of heat storage total quality, the mass loading amount of inorganic powder is 50%~100%, denitration catalyst The mass loading amount of agent is 5~40%, and the mass loading amount of additive (including enamel) is 1~10%.Denitration heat storage will be urged Agent is carried on heat storage, is allowed to have concurrently the function of accumulation of heat and denitration, is acted on by the accumulation of heat of denitration heat storage, as needed It is arranged, the catalyst stabilization in denitration heat storage can be made to carry out denitration reaction, denitration effect in the range of optimal temperature Rate is high.
According to specific embodiment of the utility model, denitration heat storage is prepared through the following steps:
(1) inorganic powder, ceramic powders, enamel, binding agent, plasticising NMF, lubricant and water are mixed, mediated And roasting, to obtain honeycomb heat accumulation body;
(2) TiO is prepared by coprecipitation2-Al2O3Composite oxides, and by TiO2-Al2O3Composite oxides with Activated carbon is mixed, and obtains denitration catalyst carrier solution;
(3) obtain the denitration containing tungsten, vanadium, iron, lanthanum using ammonium metatungstate, ammonium metavanadate, iron chloride, lanthanum chloride preparation and urge Agent active component solution;
(4) honeycomb heat accumulation body is subjected to the first impregnation process, drying and roasting in denitration catalyst carrier solution;
(5) honeycomb heat accumulation body after step (4) processing is carried out into second in denitrating catalyst active component solution to soak Stain, drying and roasting, to obtain denitration heat storage.
According to specific embodiment of the utility model, the preparation method of denitration heat storage is specifically included:
(1) refining of heat storage idiosome
By appropriate inorganic powder, ceramic powders, binding agent, plasticising NMF, mix lubricant, and add appropriate go Ionized water carries out kneading refining, obtains pug standby.
Clod is carried out it is old, old environment temperature be 15~25 DEG C, the old time be 24h~48h, through vacuum refining, The green honeycomb of specification needed for vacuum is extruded into.
Again by green honeycomb be re-fed into drying machine shape, dry, fired under the conditions of 1200 DEG C~1400 DEG C into Product.
(2)TiO2-Al2O3The preparation of composite oxides
A certain amount of titanyl sulfate and aluminium chloride are taken, is dissolved separately in appropriate deionized water, stirs, make respectively Titanium source and silicon source solution are obtained, the ratio between both concentration are 1:(0.01~2).Titanium source solution, silicon source solution, ammoniacal liquor are passed through into cocurrent Mode, is instilled in the reactor equipped with a small amount of deionized water by certain flow rate, agitating device is provided with the reactor, it is ensured that solution Well mixed, reaction is abundant.Titanium source solution is identical with silicon source solution instillation speed, the instillation speed of ammoniacal liquor is controlled, by reaction solution PH value control between 9~11, co-precipitation obtains the precipitation mixture of titanium hydroxide and aluminium hydroxide.
Activated carbon is mixed with precipitation mixture obtained above, and adds the pH value that deionized water adjusts mixture, will PH value is controlled 9 or so.
(3) configuration of mixed liquor
A certain amount of ammonium metatungstate, ammonium metavanadate reagent are dissolved in appropriate oxalic acid, the addition of oxalic acid, control is adjusted Solution pH value processed is between 5~7, and the mol ratio of vanadium tungsten is 1 in solution:(0.1~5).
By a certain amount of iron chloride (FeCl3), lanthanum chloride (LaCl3) be dissolved in appropriate deionized water, obtain iron chloride With the mixed solution of lanthanum chloride.The solution is mixed with solution obtained above, the mixed solution of tungstenic, vanadium, iron, lanthanum is obtained.
(4) main active component load
Acid-wash activation processing is carried out after the honeycomb wares obtained in step (1) are cleaned with deionized water, cleaning is drained It is impregnated in afterwards after the precipitation mixture obtained in step (2), 35~60 DEG C of dipping temperature, 8~15h of dip time, by honeycomb ceramics Take out and blow off the remnants in its hole, after then drying 8~15h under the conditions of 85~115 DEG C, under the conditions of 350~750 DEG C Weighed after 5~8h of roasting.It is repeated several times, until weight is not further added by.
(5) Supplementary active compounds and auxiliary agent load
The solid that step (4) is obtained is immersed in the mixed solution that step (3) isometric therewith is obtained, dipping temperature 15 ~30 DEG C, after 8~15h of dip time, after drying 8~15h under the conditions of 85~115 DEG C, 5 are calcined under the conditions of 350~600 DEG C Final product is obtained after~8h.
According to specific embodiment of the utility model, denitration heat storage can be spherical, strip or honeycomb ceramics shape etc..If urging Agent is spherical, and catalyst diameter can be 3~6mm;If catalyst is strip, catalyst is cylindrical shape, and diameter can be with For 3~6mm, length can be 10~60mm;It can be cuboid, square if catalyst is cellular, or circle Shape, sector, ellipse etc., size can be typically 150mm × 150mm × 150mm, 250mm × 200mm × 150mm etc., denitration The section of through hole can be square on heat storage, and size is 10mm × 10mm, 15mm × 15mm, or section can also be circle Shape, aperture is 10mm or 15mm.Profile, size, aperture are true after being considered according to composite factors such as specific operating mode, use environments It is fixed.Honeycomb ceramics shape is preferred, because the catalyst that the specific surface area of honeycombed catalyst compares other shapes is big, catalysis The contact surface of agent and reaction medium is bigger, and catalytic reaction is more efficient.When catalyst is honeycomb ceramics shape, the ratio surface of catalyst Product is in 320m2/m3More than, mechanical strength > 8MPa, the catalytic activity of nitrogen oxides reduction may be up to more than 98%.
Accumulation of heat denitration region of the present utility model is arranged in flue, preferably using sectored cell shape denitrating catalyst.It is cellular Denitrating catalyst cross section is sector, 60 ° of fan angle, radius 200mm, and the section of through hole can be side on denitration heat storage Shape, size is 20mm × 20mm.Due to containing dust in the high-temperature flue gas that is come out from granule materials Industrial Boiler, although by spray Meeting deposition fraction dust behind ammonia area and air preheater, but also contain a certain amount of dust, therefore, the denitration selected herein in flue gas The aperture that accumulation of heat honeycomb ceramics is used can not be too small.But the utility model uses the accumulation of heat denitration honeycomb ceramics added with enamel, Its surface is smooth, wear-resisting, good with regard to that can reach from the accumulation of heat denitration honeycomb ceramics of above-mentioned size with good anti-clogging Denitration effect.By using sectored cell shape denitrating catalyst, space in flue can be made full use of, whole flue is filled with and cuts Face, it is ensured that can fully be contacted with denitrating catalyst by the flue gas of denitration region, the nitrogen oxides, reducing agent in flue gas are in denitration Reduction reaction occurs for the surface of catalyst, and nitrogen oxides is reduced generation nitrogen, reaches the purpose of denitrating flue gas.
S400:Dedusting and desulfurization process
According to embodiment of the present utility model, the flue gas of removing nitrogen oxides is set to enter cyclone separator, to be removed Dirt processing;The flue gas after dust removal process is entered desulfurizer and carry out desulfurization process, to be purified rear flue gas;Will be net Flue gas is discharged by chimney after change.
According to embodiment of the present utility model, the granule materials Industrial Boiler denitrating flue gas of the utility model above-described embodiment System and method of denitration at least have one of following advantages:
(1) using the denitration heat storage for having accumulation of heat and denitration function concurrently, surface is smooth, wear-resisting, and technique is simple and feasible, flue gas Denitration reaction can be carried out without dedusting, simple to operate, denitration efficiency is high.
(2) after the softened water in the flue gas convection bank that burning is produced, temperature is reduced to after 700~1100 DEG C through storing Hot systems Mist heat recovering temperature is reduced to after 400~700 DEG C into accumulation of heat denitrating system, is reduced while accumulation of heat Reaction, nitrogen oxides is reduced and removed, is then externally discharged by chimney after removing dust, desulfurization, reduces exhaust gas temperature, is reduced Flue gas loss, reduces nitrogen oxide emission, energy-efficient, environmental protection.
(3) air/oxygen-enriched air is heated to after 700~900 DEG C by hold over system and participates in burning, and makes full use of burning The high-temperature flue gas waste heat of generation, energy-efficient, energy utilization rate is high.
Embodiment
The anthracite for being crushed to below 6mm is sprayed into boiler furnace by nozzle, with being sent into by air blower in burner hearth Air mixing after burnt, temperature is up to 1250 DEG C in burner hearth.The high-temperature flue gas that burning is produced is by being arranged on burner hearth cigarette The convection bank of gas outlet, heats and softens water.The flue gas for being reduced to 950 DEG C enters the flue being connected with accumulation of heat denitrating system In, the atomization reductant nozzle that is disposed therein sprays ammoniacal liquor droplet, flue gas with its it is rapid it is uniform mix after into hold over system, After Mist heat recovering, temperature is reduced to 450 DEG C, into accumulation of heat denitrating system.In the presence of denitration heat storage, recovered flue gas With ammoniacal liquor reduction reaction occurs for nitrogen oxides while waste heat in flue gas, and nitrogen oxides is reduced to N2, removal of nitrogen oxide Rate is up to 99%.Flue gas after removing nitrogen oxides enters desulfurization system after removing the dust included in flue gas through cyclone dust collector Externally discharged through chimney after sulfide in system, removing flue gas.
The air for sending into burner hearth above by air blower sends into burner hearth and original after denitration heat storage is preheated to 850 DEG C Burnt after material coal mixing, efficiency of combustion can be effectively improved, raw material dosage is saved, cut operating costs.
The specific proportioning of the denitration accumulation of heat heat storage is as follows:On the basis of heat storage total quality, the quality of inorganic powder Load capacity is 60%, and the mass loading amount of denitrating catalyst is 25%, and the mass loading amount of additive (including enamel) is 15%. Wherein, the active component activated carbon of denitrating catalyst accounts for 20%, V of catalyst weight2O5-WO3The 18% of catalyst weight is accounted for, Additive enamel accounts for the 55% of weight of additive.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term Identical embodiment or example need not be directed to by stating.Moreover, specific features, structure, material or the feature of description can be Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area Technical staff can be carried out the feature of the not be the same as Example described in this specification or example and non-be the same as Example or example With reference to and combination.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in scope of the present utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims (6)

1. a kind of granule materials Industrial Boiler flue gas denitrification system, it is characterised in that including:
Smoke discharging pipe, the smoke discharging pipe is connected with the exhanst gas outlet of granule materials Industrial Boiler, is set on the smoke discharging pipe There is reductant nozzle;
Heat storage, the heat storage is arranged in the smoke discharging pipe and positioned at the downstream of the reductant nozzle, the accumulation of heat Body is suitable to advance Mist heat recovering;
Denitration heat storage, the denitration heat storage is arranged in the smoke discharging pipe and positioned at the downstream of the heat storage, described Denitration heat storage is suitable to Mist heat recovering and carries out denitration process to flue gas;
Cyclone separator, the cyclone separator is connected with the gas outlet of the smoke discharging pipe, the cyclone separator Suitable for carrying out dust removal process to flue gas;
Desulfurizer, the desulfurizer is connected with the cyclone separator, and the desulfurizer is suitable to remove in flue gas Oxysulfide;And
Chimney, the chimney is connected with the desulfurizer.
2. flue gas denitrification system according to claim 1, it is characterised in that the reductant nozzle is atomizer,
Optionally, the atomizer is ammonia atomization nozzle or urea atomizer.
3. flue gas denitrification system according to claim 1, it is characterised in that the heat storage has fuel gas entrance and heat Fuel gas is exported, and the hot fuel gas outlet is connected with the fuel inlet of the granule materials Industrial Boiler.
4. flue gas denitrification system according to claim 2, it is characterised in that the denitration heat storage be spherical, strip or Honeycomb ceramics shape.
5. flue gas denitrification system according to claim 4, it is characterised in that the denitration heat storage is that cross section is fan-shaped It is cellular, the fan-shaped angle be 60 °, radius is 200mm, on the denitration heat storage through hole section for square, chi Very little is 20mm × 20mm.
6. flue gas denitrification system according to claim 4, it is characterised in that through hole section is circle on the denitration heat storage Shape, radius is 20mm.
CN201621440735.7U 2016-12-26 2016-12-26 Granule materials Industrial Boiler flue gas denitrification system Active CN206404591U (en)

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