CN203955012U - The system of boiler completing combustion decarburization and flue gas desulfurization and dedusting - Google Patents

The system of boiler completing combustion decarburization and flue gas desulfurization and dedusting Download PDF

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Publication number
CN203955012U
CN203955012U CN201420107464.8U CN201420107464U CN203955012U CN 203955012 U CN203955012 U CN 203955012U CN 201420107464 U CN201420107464 U CN 201420107464U CN 203955012 U CN203955012 U CN 203955012U
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gas
flue
water
ozone
nanofilter
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黄世鲜
唐康健
刘白天
黄世荣
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Beijing road Nano Technology Research Institute Co Ltd
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黄世鲜
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Priority to CN2013100935423A priority patent/CN103263832A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model belongs to fire coal boiler fume processing technology field, particularly relates to the de-charcoal of burning and the system to flue gas desulfurization and dedusting.Comprise 30% oxygen rich gas de-charcoal, 30% rich ozone gas in combustion process react with sulfur dioxide in flue gas and water produce dilute sulfuric acid desulfurization, by processed gas pass into nanofilter that micropore size under water is 100 nanometer～500 nanometers remove PM2.5 dust can.Advantage: 30% oxygen enrichment oxygen enrichment promotes the de-charcoal of coal completing combustion; 30% rich ozone desulfurization, denitrogenation etc., the filter membrane of 100 nanometer～500 nanometers remove PM2.5 dust can grain, desulfurization, denitrification reaction product be can be used as industry and civilian acidic liquid, do not produce sulphur gypsum, do not discharge sulfide, nitride, prevent acid rain.Reach saving mineral resources, Comprehensive Utilization Power Plant, steel mill's boiler rich and influential family discarded object the object turning waste into wealth.

Description

The system of boiler completing combustion decarburization and flue gas desulfurization and dedusting
Technical field
The utility model belongs to fire coal boiler fume processing technology field, particularly relates to the system of the desulfurization and dedusting to flue gas.
Background technology
The Chinese patent application CN200610053090.6 " coal-burning boiler fume ozone oxidation and simultaneous desulfurization denitrification apparatus and method thereof " of Zhejiang University discloses a kind of coal-burning boiler fume ozone oxidation and simultaneous desulfurization denitrification apparatus and method thereof.Method comprises the following steps: 1) before or after the electrostatic precipitator 5 of boiler flue 4,110～150 DEG C of low-temperature zone spray into ozone O 3the nitrogen oxide molar ratio spraying in ozone and boiler smoke is 0.5～1.5, water-fast lower valency nitrogen oxide in boiler smoke is oxidized into high valence state nitrogen oxide soluble in water, and oxidizing sulfur dioxide generates sulfur trioxide, and the reaction time is at least 0.5 second; 2) by sending into alkali liquid washing tower 7 through the boiler smoke of previous step processing, in alkali liquid washing tower, flue gas is washed, absorb high valence state nitrogen oxide and oxysulfide in flue gas simultaneously.
This invention weak point one is to pass into flue with the ozone gas containing 21% concentration that only normal air containing 21% oxygen is made, and the oxidation by ozone gas that the oxidation effectiveness of the sulfide in flue gas in flue and nitride is not so good as to 30% concentration is effective; The 2nd, the flue-gas temperature that ozone gas passes into flue position is 110～150 DEG C of low-temperature zone, also makes ozone be not so good as 500～600 DEG C of high temperature section to the oxidation effectiveness of the sulfide in flue gas in flue and nitride effective containing the strong ozone of ozone 30%.Weak point is also that formation dilute sulfuric acid soluble in water air pollution source sulfur dioxide is prepared as to product to be applied.Flue 2.5 micron dust collection and treatments are prepared as to superfine spherical microballon material for the such technological innovation means in industrial materials field simultaneously.
Summary of the invention
It is more abundant that the purpose of this utility model is to provide in boiler coal burning, the nuisance such as sulfur compound, nitride not in discharge flue gas can be removed system equipment that the coal-fired gas treatment of PM2.5 dust granules uses and the annexation of equipment before discharge.
The method of the de-charcoal of boiler completing combustion of the present utility model and flue gas desulfurization and dedusting thes contents are as follows:
In 500-600 DEG C of high-temperature flue gas discharge tube of boiler emission, add rich ozone gas, rich ozone gas is that weight ratio is the gas containing 30% ozone gas, high-temperature flue gas and rich ozone gas fully mix after amalgamation in discharge tube, be drained in the water of water reaction tower, make the sulfur dioxide in high-temperature flue gas, rich ozone gas and water three carry out chemical reaction and produce dilute sulfuric acid, because dilute sulfuric acid is soluble in water, sulfur dioxide removes from high-temperature flue gas, is ozone desulfurization.Nitride in high-temperature flue gas etc. also can with rich ozone gas and the water-soluble acid of water generates, nitride is removed from the high-temperature flue gas of boiler emission, also have other can with ozone gas react generate water-soluble material all can in ozone sweetening process, from high-temperature flue gas, remove; So the dilution heat of sulfuric acid claiming is here actual is the mixing material of multiple DDGS, or the mixed liquor of mixed acid and other material.Can be except deenergizing and the harmful substance of ozone gas and water manyly can not discharging of carrying out chemical reaction, contaminated environment in ozone desulfurized step.
The gas of back desulfurization is passed into wet method nanofilter under water, and the gas of filtration becomes without the dustless fume emission of sulphur, and the superfine powder filtering out slurry is dried by superfine powder baker, i.e. dust removal by filtration.Gas through desulfurization does not produce acid in this dust removal by filtration step, 100 nanometer～500 nanofilter is not caused to harmful corrosion, so will carry out ozone desulfurized step before dust removal by filtration step.Also should remove and thicker can protect thing by grain with removing filter that PM2.0～3.0 can grain before this dust removal by filtration step.
This method can be used for the purified treatment of any coal-burning boiler institute smoke discharging, significant especially for the purified treatment of coal-fired plant boiler institute smoke discharging, can greatly reduce coal-burning power plant's environmental pollution, particularly produce the pollution of the following dust granules of PM2.5 and acid rain environment.
Rich ozone gas to the input quantity in discharge tube is: the molal quantity of ozone in rich ozone gas: the molal quantity sum=1.2～1.5:1.0 of discharge tube medium sulphide content and nitride.Outside sulphide removal and nitride, also have other need to consume ozone, so the molal quantity of ozone should be greater than the molal quantity sum of sulfide and nitride
In the combustion chamber of boiler, be filled with oxygen rich gas, oxygen rich gas is that weight ratio is the oxygen rich gas containing 30% oxygen, and coal can fully be burnt, and reduces the discharge of imperfect combustion thing, is the de-charcoal of oxygen enrichment.Fully burn than being more conducive to coal containing 21% oxygen normal air containing the oxygen rich gas of 30% oxygen, greatly reduce there is no that clean-burning coal powder is tiny can grain, be the de-charcoal of oxygen enrichment.
It is as follows that the utility model completes the system for content that the de-charcoal of boiler completing combustion and FGD dust collection method use:
(1) oxygen enrichment converter connects coal-burning boiler and ozone generator, and oxygen enrichment converter is to coal-burning boiler and ozone generator output oxygen rich gas, and oxygen rich gas is that weight ratio is the gas containing 30% oxygen; Oxygen enrichment converter is communicated with coal-burning boiler and ozone generator, and oxygen rich gas is defeated by coal-burning boiler and ozone generator.Oxygen enrichment converter is with being that to make weight ratio be the oxygen rich gas containing 30% oxygen to raw material containing the normal air of 21% oxygen.
(2) coal-burning boiler connects flue, and the flue gas of coal-burning boiler is discharged from flue.Coal-burning boiler is to contain in the environment of oxygen rich gas of 30% oxygen there being weight ratio, coal is fully burnt, the coal smoke of burning is that the flue that flue gas is communicated with from coal-burning boiler is discharged, and the high-temperature smoke gas in flue is that flue-gas temperature is the gas of 500-600 DEG C.
(3) ozone generator is communicated with flue, and the other end of flue is communicated with the multistage rotary dust collector with nanometer film; Ozone generator is that to become weight ratio be the rich ozone gas containing 30% ozone gas for oxygen rich gas containing 30% oxygen weight ratio, ozone generator is defeated by rich ozone gas among the flue of 500-600 DEG C of high temperature section, in this flue, 500-600 DEG C of high-temperature smoke gas and rich ozone gas fully act on, after sulfide in flue dust gas and nitride are fully oxidized, among the multistage rotary dust collector of input tape nanometer film, carry out dedusting.Under 500-600 DEG C of condition, sulfide and nitride are fully oxidized and refer to that a low price sulphion is oxidized to high price sulphion, as being sulfur trioxide oxidizing sulfur dioxide, so that sulfur trioxide reacts and becomes sulfuric acid with water chemistry.In like manner fully be oxidized for nitride, react and become nitric acid with water chemistry.
(4) multistage rotary dust collector with nanometer film above with pipeline communication water reaction tower, the multistage rotary dust collector with nanometer film below can grain collector by pipeline communication thickness; Filtering material in multistage rotary dust collector with nanometer film a large amount of in flue dust gas can the filtering of grain thing, make can grain thing separated from the gas, can grain thing gravitate drop to thickness below the multistage rotary dust collector with nanometer film can grain collector in, gas enters water reaction tower by pipeline above the multistage rotary dust collector with nanometer film.The effect of the multistage rotary dust collector with nanometer film is porose material divided gas flow and can grain thing, can vary by a grain thing in flue dust gas, and classification to remove can a thing.In the multistage rotary dust collector with nanometer film, be that the first order removes slightly can grain thing, so in the multistage rotary dust collector with nanometer film, should have the filtering material of removing PM10.0, also to by PM10.0 filtering material gas reusing remove PM5.0 can grain filtering material filtering gas again.Last again with remove filtering material that PM2.0～3.0 can grain remove most of dust can grain, the dust of remaining a small amount of PM2.5 can be removed by grain in follow-up wet method nanofilter.So, the most handy PM10.0 of removing of multistage rotary dust collector with nanometer film can grain filtering material, remove PM5.0 can grain filtering material, remove PM2.0～3.0 can grain three grades of difference dedustings successively of filtering material.
(5) water reaction tower is communicated with wet method nanofilter, mixed acid liquid pool and drier respectively;
In water reaction tower, water is housed, is soaked with porous permeable pipe in water, porous permeable pipe is the pipeline that tube wall has a large amount of apertures; Porous permeable pipe one end is communicated with the multistage rotary dust collector with nanometer film, and the porous permeable pipe other end is communicated with wet method nanofilter; High-temperature smoke gas and rich ozone gas in porous permeable pipe produce chemical reaction in the water of water reaction tower, and wherein sulfur dioxide, ozone gas and water three carry out chemical reaction generation dilute sulfuric acid; When the dilute sulfuric acid in water reaction tower is after finite concentration, dilute sulfuric acid is discharged into mixed acid liquid pool from water reaction tower; In water reaction tower, the oxidized reaction with water of nitride in flue dust gas produces nitric acid, and becoming nitric acid liquid is all environmentally friendly chemical reaction.So in acid bath, be the mixture of multiple acid, i.e. mixed acid liquid pool.
Gas in water reaction tower in porous permeable pipe is defeated by wet method nanofilter, is also through being defeated by wet method nanofilter by the gas after water dedusting in water reaction tower; So that further dedusting.
After the water filling in water reaction tower and the effect of high-temperature smoke gas, in water, be also dissolved with in flue dust gas can grain thing, form containing thickness mix can grain underflow, below water reaction tower through piping containing thickness mix can grain underflow be discharged into drier.Drier is discharged into thickness dry thing and can in grain collector, stores.
(6) escape pipe of wet method nanofilter is communicated with chimney, and the grout outlet below wet method nanofilter is communicated with superfine powder baker; What the escape pipe of wet method nanofilter was discharged into chimney is dustless without sulphur flue gas, and superfine powder baker dries the fine dust slurry of wet method nanofilter for micro-nano powder.Gas after the nanofilter in wet method nanofilter water is dustless without sulphur flue gas, and the nanometer film stacked laminator of 100 nanometer～500 nanometers filters for this nanofilter, dustless without sulphur flue gas be exactly very environmental protection can safety dumping gas.Make to be removed the gas that PM10.0, PM5.0, PM2.0～3.0 can grains, also by water reaction tower dust removal by filtration, use again the nano-film filtration of 100 nanometer～500 nanometers, before removing, in step, more micro-nanoscale dust can grain, make the last chimney of its coal-burning boiler do not discharge PM2.5 harmful dust can grain, particularly solve coal-burning power plant, steel mill PM2.5 dust can grain to air pollution.Through the nano-film filtration of 100 nanometer～500 nanometers and the micro-nano powder obtaining is rare, valuable micro-nano powder, these micro-nano powders are the powder through boiler high temperature sintering, chemical property and shape and structure are highly stable, and this micro-nano powder has very high economic worth.
Nanofilter in described wet method nanofilter is that micropore size is the stacked device of the filter membrane of 100 nanometer～500 nanometers.
Advantage of the present utility model:
(1) oxygen enrichment promotes completing combustion: make strong oxidizer with the oxygen enrichment of content 30% and replace always directly with 21% the abundant fuel of oxygen promotion coal in air, make the oxygen enrichment of 99% coal combustible and 30% can burn more thoroughly, safer.Can improve significantly the utilization rate of fuel, can shorten again burning time more than 80%, can also fundamentally eliminate the malicious pernicious gas producing in fuel combustion.
(2) rich ozone desulfurization, denitrogenation: because ozone has extremely strong oxidisability, the toxic and harmfuls such as CO, NO, H2S and SO2 that the ozone of content 30% can be got rid of fuel in burning are afterwards direct oxidation into CO2, NO2, H2OS4 and SO3.And being dissolved in (H2O) water, NO2 and SO3 become acid solution.Above-mentioned have poison gas thing to be oxidized by force after, only have CO2 and H2O to discharge from tail gas.This has just fundamentally eliminated CO in power plant, steel mill's boiler flue, NO, the toxic and harmfuls such as H2S and SO2 and reach, clean, efficiently, energy-saving and environmental protection object.Present power plant, the large-scale desulfurization of gypsum device of steel mill can be reduced into miniature water like this and process desulfurizer.The utility model water treatment devulcanizer device is got and has been replaced power plant, the large-scale desulfurization of gypsum device of the high large investment of steel mill, has solved former desulfurization of gypsum byproduct---the environmental pollution again of sulfur-bearing gypsum., rare nitric acid and the dilute sulfuric acid of NO2 soluble in water and SO3 generation be can be used in industrial and agricultural products meanwhile, thoroughly solve the formation of acid rain in air, reach the object of the to protect mankind living environment of preserving our planet.
(3) three sizing of equipment dedustings solve PM2.5 dust pollution: with three equipment of multistage rotary dust collector, water reaction tower, wet method nanofilter with nanometer film, can grain size divide PM10.0, PM5.0, the multistage dedusting of PM2.5 to solve PM2.5 dust pollution by dust.And collect the micro-nano powder that obtains the PM2.5 rank with very high economic worth, realize pollution treatment and profit doulbe-sides' victory.The PM2.5 that thoroughly solves the boiler rich anies influential family such as power plant, steel mill administers a difficult problem.Reach saving mineral resources, Comprehensive Utilization Power Plant, steel mill's boiler rich and influential family discarded object are also turned waste into wealth, clean, environmental protection, circulation, high added value, fast-developing high-tech cluster industrial chain.
(4) rich ozone is to solve to remove the guarantee of PM2.5 dust cost: with removing after variable corrosivity containing 30% rich ozone desulfurization, denitrogenation etc., solve the problem that the nano-film filtration device of 100 nanometer～500 nanometers is not corroded, to have cost low for removing the PM2.5 dust of coal burning flue dust to make to be worth expensive nano-film filtration device, the guarantee that economic worth is high.
(5) be also that by formation dilute sulfuric acid soluble in water sulfur dioxide, dilute sulfuric acid also can be prepared as industrial products and be applied with native system by present power plant, steel mill's discharged air pollution sources sulfur dioxide.PM2.5 dust collection processing in flue gas is prepared as to superfine spherical microballon material for the such technological innovation means in industrial materials field simultaneously.
(6) adopt oxygen content to make combustion adjuvant higher than 21% oxygen rich gas, make in coal fuel 99% combustible thoroughly burn, and shorten burning time more than 80%.
(7) in coal-burning power plant, to pass into weight ratio be the rich ozone gas containing 30% ozone for the flue in 500～600 DEG C of regions of steel mill boiler exhaust gas outlet, efficiently oxidizing sulfur dioxide is become after sulfur trioxide, enter the sulfuric acid that is dissolved into high added value in the water treatment facilities of rear end, simultaneously, also tackle 500～600 DEG C of regional temperature section flues and transform, the ozone of effectively avoiding 30% high concentration is that oxygen rich gas is fed back into the unsafe factors such as the blast that in 1400～2100 DEG C of high temperature pot thoraxes, conflagration causes.
Relevant knowledge of the present utility model: being no matter to use in air 21% oxygen to make combustion adjuvant, still using 30% oxygen to make combustion adjuvant, is all to belong to " Combustion " theoretical category.In the oxidation of emitting light and heat (burning) process, the air burning of 99% combustible and oxygenous amount 21% is incomplete, cause the utilization rate deficiency of coal fuel, carbon, sulfide, nitride etc. after imperfect combustion, produce the toxic and harmfuls such as a large amount of CO, NO, H2S, SO2 and PM2.5 dust can grain.Atmospheric environment is caused to severe contamination, and harm people's is healthy.The gas of 30% oxygen concentration exceeds 9% than 21% oxygen concentration in air.The ozone of content 30% belongs to strong oxidizer, and it is more much better than than the oxidisability of content 30% oxygen.CO, NO, H2S, SO2 hot gas in the flue gas of this external high-temperature flue discharge, can by the ozone in content 30% ozone gas directly, be completely oxidized to CO2, NO2, SO3, the wherein water-soluble sulfuric acid that can be made into high added value of SO3.CO2 and H2O discharge from tail gas.Reach objects clean, efficient, energy-saving and environmental protection.The device of a set of transformation thermal power plant, steel mill's integral loop insurance system, it comprises has transformed the modernization system such as the using instead of furnace temperature, incendiary agent of thermal power plant, steel mill's burning boiler, the interpolation of oxygen enrichment agent.Meanwhile, the utility model integral loop insurance system is got the desulfurizer, dust arrester and the carbon removal device that have replaced thermal power plant, steel mill.The utility model device integral loop insurance system is that the integral loop insurance system saving of coal-fired station, steel mill is invested more than 50%, saves occupation area of equipment 2/3rds.
The content that the utility model belongs to reported first is that 30% oxygen rich gas is applied to and in power plant, steel mill's boiler, carries out the de-charcoal of completing combustion, content is 30% ozone oxidation reaction in flue gas, the environmental protection model technology of removing PM2.5 ultrafine dust particle when mixed flue gas is placed in water desulfurization removing impurities matter, has science, novelty and originality.
Brief description of the drawings
Fig. 1 is each equipment connecting relation of the present utility model and equipment component structural representation.
Detailed description of the invention
Embodiment 1, the de-charcoal of boiler completing combustion and the method for flue gas desulfurization and dedusting and the system using
As Fig. 1,
(1) method of the de-charcoal of boiler completing combustion and the each equipment work of flue gas desulfurization dust-removal system
1, the method for the de-charcoal of boiler completing combustion: be filled with oxygen rich gas in the combustion chamber of boiler, oxygen rich gas is that weight ratio is the oxygen rich gas containing 30% oxygen, and coal can fully be burnt, and reduces the discharge of imperfect combustion thing, is the de-charcoal of oxygen enrichment.
2, the method for flue gas desulfurization: add rich ozone gas in 500-600 DEG C of high-temperature flue gas discharge tube of boiler emission, rich ozone gas is that weight ratio is the gas containing 30% ozone gas, high-temperature flue gas and rich ozone gas fully mix after amalgamation in discharge tube, be drained in the water of water reaction tower, make the sulfur dioxide in high-temperature flue gas, rich ozone gas and water three carry out chemical reaction and produce dilute sulfuric acid, because dilute sulfuric acid is soluble in water, sulfur dioxide removes from high-temperature flue gas, is ozone desulfurization.Rich ozone gas to the input quantity in discharge tube is: the molal quantity of ozone in rich ozone gas: the molal quantity sum=1.2～1.5:1.0 of discharge tube medium sulphide content and nitride.
3, flue gas removes the method for PM2.5 dust: the gas of back desulfurization is passed into wet method nanofilter under water, and the gas of filtration becomes without the dustless fume emission of sulphur, and the superfine powder filtering out slurry is dried by superfine powder baker, i.e. dust removal by filtration.Wet method nanofilter is that micropore size is the nanometer film stacked laminator of 100 nanometer～500 nanometers.
(2) complete the each equipment of system and the annexation thereof that the de-charcoal of boiler completing combustion and FGD dust collection method use
(1) oxygen enrichment converter connects coal-burning boiler and ozone generator, and oxygen enrichment converter is to coal-burning boiler and ozone generator output oxygen rich gas, and oxygen rich gas is that weight ratio is the gas containing 30% oxygen; Oxygen enrichment converter is communicated with coal-burning boiler and ozone generator, and oxygen rich gas is defeated by coal-burning boiler and ozone generator.Oxygen enrichment converter is that to make weight ratio be the oxygen rich gas containing 30% oxygen to raw material with air.
(2) coal-burning boiler connects flue, and the flue gas of coal-burning boiler is discharged from flue.Coal-burning boiler is to contain in the environment of oxygen rich gas of 30% oxygen there being weight ratio, coal is fully burnt, the coal smoke of burning is that the flue that flue gas is communicated with from coal-burning boiler is discharged, and the high-temperature smoke gas in flue is that flue-gas temperature is the gas of 500-600 DEG C.
(3) ozone generator is communicated with flue, and the other end of flue is communicated with the multistage rotary dust collector with nanometer film; Ozone generator is that to become weight ratio be the rich ozone gas containing 30% ozone gas for oxygen rich gas containing 30% oxygen weight ratio, ozone generator is defeated by rich ozone gas among the flue of 500-600 DEG C of high temperature section, in this flue, 500-600 DEG C of high-temperature smoke gas and rich ozone gas fully act on, after sulfide in flue dust gas and nitride are fully oxidized, among the multistage rotary dust collector of input tape nanometer film, carry out dedusting.Under 500-600 DEG C of condition, sulfide and nitride are fully oxidized and refer to that a low price sulphion is oxidized to high price sulphion, as being sulfur trioxide oxidizing sulfur dioxide, so that sulfur trioxide reacts and becomes sulfuric acid with water chemistry.In like manner fully be oxidized for nitride, react and become nitric acid with water chemistry.
(4) multistage rotary dust collector with nanometer film above with pipeline communication water reaction tower, the multistage rotary dust collector with nanometer film below can grain collector by pipeline communication thickness; Filtering material in multistage rotary dust collector with nanometer film a large amount of in flue dust gas can the filtering of grain thing, make can grain thing separated from the gas, can grain thing gravitate drop to thickness below the multistage rotary dust collector with nanometer film can grain collector in, gas enters water reaction tower by pipeline above the multistage rotary dust collector with nanometer film.The effect of the multistage rotary dust collector with nanometer film is porose material divided gas flow and can grain thing, can vary by a grain thing in flue dust gas, and classification to remove can a thing.In the multistage rotary dust collector with nanometer film, be that the first order removes slightly can grain thing, remove so should have in the multistage rotary dust collector with nanometer film the three-stage filtration material that PM10.0, PM5.0, PM2.0～3.0 can grains, the dust of remaining a small amount of PM2.5 can be removed by grain in follow-up wet method nanofilter.
(5) water reaction tower is communicated with wet method nanofilter, mixed acid liquid pool and drier respectively;
In water reaction tower, water is housed, is soaked with porous permeable pipe in water, porous permeable pipe is the pipeline that tube wall has a large amount of apertures; Porous permeable pipe one end is communicated with the multistage rotary dust collector with nanometer film, and the porous permeable pipe other end is communicated with wet method nanofilter; High-temperature smoke gas and rich ozone gas in porous permeable pipe produce chemical reaction in the water of water reaction tower, and wherein sulfur dioxide, ozone gas and water three carry out chemical reaction generation dilute sulfuric acid; When the dilute sulfuric acid in water reaction tower is after finite concentration, dilute sulfuric acid is discharged into mixed acid liquid pool from water reaction tower; In water reaction tower, the oxidized reaction with water of nitride in flue dust gas produces nitric acid, and becoming nitric acid liquid is all environmentally friendly chemical reaction.So in acid bath, be the mixture of multiple acid, i.e. mixed acid liquid pool.
Gas in water reaction tower in porous permeable pipe is defeated by wet method nanofilter, is also through being defeated by wet method nanofilter by the gas after water dedusting in water reaction tower; So that further dedusting.
After the water filling in water reaction tower and the effect of high-temperature smoke gas, in water, be also dissolved with in flue dust gas can grain thing, form containing thickness mix can grain underflow, below water reaction tower through piping containing thickness mix can grain underflow be discharged into drier.Drier is discharged into thickness dry thing and can in grain collector, stores.
(6) escape pipe of wet method nanofilter is communicated with chimney, and the grout outlet below wet method nanofilter is communicated with superfine powder baker; What the escape pipe of wet method nanofilter was discharged into chimney is dustless without sulphur flue gas, and superfine powder baker dries the fine dust slurry of wet method nanofilter for micro-nano powder.Gas after the nanofilter in wet method nanofilter water is dustless without sulphur flue gas, and the nanometer film stacked laminator of 100 nanometer～500 nanometers filters for this nanofilter, dustless without sulphur flue gas be exactly very environmental protection can safety dumping gas.With the nano-film filtration of 100 nanometer～500 nanometers, remove nanoscale dust more micro-in front step can grain, make the last chimney of its coal-burning boiler do not discharge PM2.5 harmful dust can grain, particularly solve coal-burning power plant, steel mill PM2.5 dust can grain to air pollution.Through the nano-film filtration of 100 nanometer～500 nanometers and the micro-nano powder obtaining is rare, valuable micro-nano powder, these micro-nano powders are the powder through boiler high temperature sintering, chemical property and shape and structure are highly stable, and this micro-nano powder has very high economic worth.
Nanofilter in described wet method nanofilter is that micropore size is the stacked device of the filter membrane of 100 nanometer～500 nanometers, this device be remove PM2.5 dust can grain filter.

Claims (2)

1. the system of boiler completing combustion decarburization and flue gas desulfurization and dedusting, is characterized in that:
(1) oxygen enrichment converter connects coal-burning boiler and ozone generator, and oxygen enrichment converter is to coal-burning boiler and ozone generator output oxygen rich gas, and oxygen rich gas is that weight ratio is the gas containing 30% oxygen; Oxygen enrichment converter is communicated with coal-burning boiler and ozone generator, and oxygen rich gas is defeated by coal-burning boiler and ozone generator;
(2) coal-burning boiler connects flue, and the flue gas of coal-burning boiler is discharged from flue;
(3) ozone generator is communicated with flue, and the other end of flue is communicated with the multistage rotary dust collector with nanometer film; Ozone generator is that to become weight ratio be the rich ozone gas containing 30% ozone gas for oxygen rich gas containing 30% oxygen weight ratio, ozone generator is defeated by rich ozone gas among the flue of 500-600 DEG C of high temperature section, in this flue, 500-600 DEG C of high-temperature smoke gas and rich ozone gas fully act on, after sulfide in flue dust gas and nitride are fully oxidized, among the multistage rotary dust collector of input tape nanometer film, carry out dedusting;
(4) multistage rotary dust collector with nanometer film above with pipeline communication water reaction tower, the multistage rotary dust collector with nanometer film below can grain collector by pipeline communication thickness; Filtering material in multistage rotary dust collector with nanometer film a large amount of in flue dust gas can the filtering of grain thing, make can grain thing separated from the gas, can grain thing gravitate drop to thickness below the multistage rotary dust collector with nanometer film can grain collector in, gas enters water reaction tower by pipeline above the multistage rotary dust collector with nanometer film;
(5) water reaction tower is communicated with wet method nanofilter, mixed acid liquid pool and drier respectively;
In water reaction tower, water is housed, is soaked with porous permeable pipe in water, porous permeable pipe is the pipeline that tube wall has a large amount of apertures; Porous permeable pipe one end is communicated with the multistage rotary dust collector with nanometer film, and the porous permeable pipe other end is communicated with wet method nanofilter; High-temperature smoke gas and rich ozone gas in porous permeable pipe produce chemical reaction in the water of water reaction tower, and wherein sulfur dioxide, ozone gas and water three carry out chemical reaction generation dilute sulfuric acid; When the dilute sulfuric acid in water reaction tower is after finite concentration, dilute sulfuric acid is discharged into mixed acid liquid pool from water reaction tower;
Gas in water reaction tower in porous permeable pipe is defeated by wet method nanofilter;
After the water filling in water reaction tower and the effect of high-temperature smoke gas, in water, be also dissolved with in flue dust gas can grain thing, form containing thickness mix can grain underflow, below water reaction tower through piping containing thickness mix can grain underflow be discharged into drier;
(6) escape pipe of wet method nanofilter is communicated with chimney, and the grout outlet below wet method nanofilter is communicated with superfine powder baker; What the escape pipe of wet method nanofilter was discharged into chimney is dustless without sulphur flue gas, and superfine powder baker dries the fine dust slurry of wet method nanofilter for micro-nano powder.
2. the system of boiler completing combustion decarburization according to claim 1 and flue gas desulfurization and dedusting, is characterized in that: the nanofilter in described wet method nanofilter is that micropore size is the stacked device of the filter membrane of 100 nanometer～500 nanometers.
CN201420107464.8U 2013-03-22 2014-03-04 The system of boiler completing combustion decarburization and flue gas desulfurization and dedusting Expired - Fee Related CN203955012U (en)

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CN103263832A (en) * 2013-03-22 2013-08-28 黄世鲜 Method and system for decarburization through complete combustion of boiler as well as desulfurization, denitration and dust removal of exhaust gas

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