WO2010105646A1 - Verfahren und anlage zur separaten vorabscheidung von schadstoffen und schadgasen aus rauch- und abgasen durch schüttschichtfilter und nassgaswäscher - Google Patents
Verfahren und anlage zur separaten vorabscheidung von schadstoffen und schadgasen aus rauch- und abgasen durch schüttschichtfilter und nassgaswäscher Download PDFInfo
- Publication number
- WO2010105646A1 WO2010105646A1 PCT/EP2009/002086 EP2009002086W WO2010105646A1 WO 2010105646 A1 WO2010105646 A1 WO 2010105646A1 EP 2009002086 W EP2009002086 W EP 2009002086W WO 2010105646 A1 WO2010105646 A1 WO 2010105646A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- additive
- crushing
- packed bed
- stage
- gases
- Prior art date
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Classifications
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- 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
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
Definitions
- the invention relates to a method according to the features of the first claim and a system according to the features of claim 9.
- the invention is applicable everywhere where pollutants or noxious gases, in particular SO 3 and SO 2 by dry sorption in a packed bed filter and then almost completely SO 2 in a Najiwaschclar where the additive from the
- Bulk filter is used as sorbent, must be removed from flue gases or exhaust gases from incineration or production plants.
- Bulk bed filters and wet scrubbers are known apparatuses for processes for separating pollutants from flue gases or exhaust gases.
- DE 43 31 415 C3 describes a device for treating a flue gas stream with washing liquid in a container, a first spraying device for washing liquid in the upper region of the container, a arranged below the spraying Gas- Fiüsstechnikstrennhand and arranged below the gas-liquid separation stage second spraying device, wherein the Gas-liquid separation stage has at least a plurality of substantially parallel spaced and substantially more to the gas flow direction extending collecting and discharge channels.
- the document describes the structure of an absorber generally used for gas purification, which is used for the liquid cleaning of a flue gas.
- DD 269 893 A1 describes a process and a plant for additive suspension for the flue gas desulfurization, wherein the suspension treatment is integrated into the flue gas desulfurization plant.
- the additives are pneumatically transported in the container located above the absorber, wherein the conveying air is passed with an additive fine fraction in a hot gas stream before the absorption and the additive suspension is fed directly into the absorber.
- a flue gas stream in addition to the deposited contaminants in the process of SO 2, SO 3, HCl, HF, as well as various Schwermetatle dust particles and mainly contains carbon dioxide.
- Arises The purification of flue gases from fossil fuel-fired power plants with lime / limestone-based wash suspension and addition of oxygen to the wash process to obtain reusable gypsum products as a residue is known.
- oxygen in the form of compressed finest air bubbles either in a separate oxidation vessel through which the limestone suspension from the absorber is passed, or, more widespread today, directly into the absorber sump in which the lime / limestone suspension is stored , registered and dispersed.
- the medium to be cleaned flows through a loose granular layer of a sorbent.
- the sorbent or additive consists of different materials, with different particle sizes and pore voluminas, such as, for example, For example, limestone, calcium hydroxide, zeolites, silica gel, aluminum hydroxide, activated carbon, hearth furnace coke, clay minerals and the like. a. as well as pellets or granules of o. g. Materials or mixtures thereof.
- the packed bed filter in those with fixed bed, with static bed and those with moving bed, with moving bed, as well as their flow in DC, countercurrent and cross flow.
- the exhaust air or exhaust gas flow through the additive bed store the
- Pollutants on the surface of the sorbent and are bound by it are bound by it.
- a distinction is basically a pure physisorption (van der Waals forces) of which mainly heavy metals and organic components are concerned and the chemisorption, in which a material conversion takes place by chemical reactions between pollutants and sorbent. This mainly affects pollutants such as
- wet scrubber fine-grained, dust-like sorbent is introduced either as a solid in the washing liquid or added with water dosed as a sorbent suspension in the wet scrubber.
- the wet scrubber is mainly used for the separation of SO 2 and HCl at high pollutant concentrations.
- SO3 is present at the latest after the saturation of the flue gas with water vapor in the scrubber as an aerosol and operating values show that a wet scrubber can deposit only very limited aerosols.
- utilization rates of the sorbent are generally achieved of> 95%. With the wet scrubber, SO 2 separation rates of> 99% can be achieved.
- the high SO 2 separation rates are caused by a large volume of scrubbing liquid which is injected into the flue gas at several superimposed spray levels, or / and by internals which smooth out the gas flow and result in an intensive mass transfer to the scrubbing liquid, or / and by flowing the flue gas through the washing liquid.
- Higher SO 2 separation rates result in an increase in the pressure loss across the scrubber in all cases.
- the sum of sulfur dioxide, ie SO 3 is converted into SO 2 and SO 2 is contained. If only a wet scrubber is used for the SOx separation, the SO 2 separation at low limit values must be significantly increased to compensate for the limited SO 3 separation.
- SO 3 -Rohgasloom and limited SO 3 -Abscheidung in wet scrubber it may be impossible to fall below low limits, since then the SO 3 content in
- the disadvantage of the scrubber is the limited degree of separation for dusts and aerosols, in particular the SO 3 aerosols.
- the object of the invention is therefore to provide a cost effective and effective method for achieving high separation efficiencies for pollutants and noxious gases esp. SO 3 / SO 2 from flue gases or exhaust gases, in which the sorbents used for maximum utilization.
- the inventive solution provides that high SO 3 / SO 2 -Abscheidegrade is achieved by series connection of bulk layer filtration with a wet scrubber.
- a fresh, coarse-grained additive is used to remove SO 3 by means of dry sorption from the flue gas stream.
- the partially consumed and reacted additive from the first purification stage is processed in a comminution process for use as an additive for the second purification stage (wet scrubber).
- this additive which is introduced into the wash suspension, essentially removes SO 2 from the flue gas stream.
- the additive can be almost completely implemented in the wet scrubbing process for the assured SO 2 separation.
- the bulk layer filter sorbent of the type is added as mentioned above, for example, coarse crushed limestone.
- lumpy limestone can be comminuted in a coarse comminution unit, for example a jaw crusher, and classified in a screening machine. It is advantageous to use a screening machine with two trays, the coarse material of the screening machine is again added to the coarse crushing, the sieve passage of the first sieve, the feed material for the packed bed filter and the sieve passage of the second sieve a crushing, such as a fine grinding, in a mill , is added.
- the pollutant-laden flue gas which comes for example from an incinerator, can first a
- Dust are supplied, in which a pre-dedusting takes place.
- the dedusted flue gas can then be fed to a heat exchanger in which a cooling takes place.
- the cooled flue gas then passes into the packed bed filter, which represents a first purification stage.
- the coarse-grained additive is partially consumed.
- the partially consumed additive is passed through the packed bed filter and discharged.
- the bulk material flows down and is discharged, for example by a rotary valve.
- the pre-cleaned in a first purification stage flue gas is conveyed by means of blower, with a further cooling can take place in a heat exchanger.
- the cooled flue gas is then fed to a second purification stage in a wet scrubber, which leaves it as a clean gas.
- the partially consumed additive of the packed bed filter it is separated by means of a solids separation stage, the inert component of the separation being discharged from the process.
- Suitable solids separation stages are apparatuses with which abrasion of the surface takes place and the abraded constituents are discharged.
- autogenous grinding, sieve drum mills, Reibmahl aggregates, a pneumatic vortex direction or so-called peeling machines are suitable.
- the used or the inert The proportion of the additive is fed to a comminution and prepared additive, from which the inerts were separated in the separation process, are added back to the packed bed filter.
- fine or superfine comminution is suitable, which can be carried out in the mill, for example in a hammer mill, vibration mill or ball mill.
- the additive is further digested, so that free surfaces arise.
- the finely ground additive is added to an absorbent tank mixed with water and added to the wet scrubber.
- the inventive method and the system have the advantage that optimum utilization of the additive by the combination of the two separation stages, a high SO 3 separation efficiency when using CaCO 3 or Ca (OH) 2 is achieved in the packed bed filter. Furthermore, selective SO 3 deposition occurs in the packed bed filter when using CaCO 3 . Only one type of sorbent is needed for both separation stages.
- the sulfuric acid dew point in the flue gas when using Ca (OH) 2 or CaCO 3 as an additive is much lower than before the first purification stage (packed bed filter), thereby reducing the risk of corrosion of the flue gas ducts until the entry of wet scrubber.
- the wet scrubber upstream bulk layer filter can also be used as Staubvorabscheider.
- the separated dust or inert and inactive components can be separated at the bulk material filter discharge by a solid separation (coarse-fine) from the additive used and disposed of separately.
- the clean gas values for flue gas cleaning for SO 3 , dust and SO 2 can be significantly reduced by connecting the bulk layer filter upstream.
- FIG. 1 the system for cleaning flue gas is shown as a schematic diagram in FIG. This consists of the packed bed filter 22 and the wet scrubber 29, wherein between the packed bed filter 22 and wet scrubber 29, a fan 27 and heat exchanger 28 are arranged.
- the crusher 18 Upstream of the additive, which is limestone, is the crusher 18, for example a hammer crusher, which is followed by a screening machine 19 with two trays (e.g., 10mm and 1mm mesh).
- the coarse material 9 of the comminution 18 remains on the screen with the largest mesh size and is abandoned in the crusher 18 again.
- the grain fraction 10 remains on the screen with the smallest mesh size and forms the feed material 10 for the packed-bed filter 22.
- the finest material 11, which leaves the screening machine 19, is fed to a fine comminution in a further comminution stage 25, which constitutes a mill.
- Pollutant-laden flue gases 1 from an incinerator are pre-dedusted coming from the waste heat boiler in a Staubvorabscheider 20.
- the heat content of the flue gas 2 can be used even before entering the bulk layer filter 22.
- the flue gas 3 flows through the packed bed filter 22 as the first cleaning stage.
- the sorbent consists of a granular, flowable solid or granules based on magnesium or calcium.
- limestone 7 is comminuted by a comminution apparatus 18 into limestone chippings 8 and then produced in a screening machine 19 via two sieve trays a certain grain fraction 10 and fed to the bulk layer filter 22.
- the packed bed filter 22 takes place on the feed material 10, the partial deposition of the pollutants contained in the dedusted flue gas 3 and noxious gases, here esp.
- the main separation of SO 3 takes place and other noxious gases can be separated into side reactions.
- the partially reacted off additive 12 is withdrawn continuously or discontinuously from the packed bed filter 22 and metered discharged, in the present representation by means of rotary valve 23.
- a solids separation stage 24 coarse-fine separation, the additive 12 is separated after use in the packed bed filter 22 of inert, and the treated additive 13 is recirculated again for re-use in the packed bed filter 22 or fed to the subsequent comminution stage 25.
- the separated inerts or inactive ingredients 15 are disposed of separately.
- the resulting from the bulk layer filter 22 after the separation 24 discharged additive 14 is a crushing stage 25 z. B. fed to a dry or wet mill.
- the coarse grained Additive 14 is treated to a usable in wet scrubber grain fraction (limestone powder), wherein the not yet reacted portion of the additive is exposed in this case.
- the thus reactivated additive 16 is treated with water as a carrier liquid in the absorbent container
- the wet scrubber 29 in which the main separation of SO 2 and subsequent deposition of SO 3 takes place, the ground reactivated additive 16 from the packed bed filter 22 is used as the absorption means 17.
- the sorbent can be used here for the deposition of SO x with a stoichiometry close to 1, 0, and thus the partially saturated additive from the packed bed filter 22 almost completely consumed / used in the wet scrubber 29.
- the purified exhaust gas 6 is supplied to further purification, treatment stages or discharged via a chimney. A portion of the pre-crushed additive 8, the screen passage 11, is fed directly to the crushing stage 25, a mill for producing the absorbent 17 used for the wet scrubber 29.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112009004982T DE112009004982A5 (de) | 2009-03-20 | 2009-03-20 | Verfahren und Anlage zur separaten Vorabscheidung von Schadstoffen und Schadgsen aus Rauch- und Abgasen durch Schüttschichtfilter und Naßgaswäscher |
PCT/EP2009/002086 WO2010105646A1 (de) | 2009-03-20 | 2009-03-20 | Verfahren und anlage zur separaten vorabscheidung von schadstoffen und schadgasen aus rauch- und abgasen durch schüttschichtfilter und nassgaswäscher |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/EP2009/002086 WO2010105646A1 (de) | 2009-03-20 | 2009-03-20 | Verfahren und anlage zur separaten vorabscheidung von schadstoffen und schadgasen aus rauch- und abgasen durch schüttschichtfilter und nassgaswäscher |
Publications (1)
Publication Number | Publication Date |
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WO2010105646A1 true WO2010105646A1 (de) | 2010-09-23 |
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PCT/EP2009/002086 WO2010105646A1 (de) | 2009-03-20 | 2009-03-20 | Verfahren und anlage zur separaten vorabscheidung von schadstoffen und schadgasen aus rauch- und abgasen durch schüttschichtfilter und nassgaswäscher |
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DE (1) | DE112009004982A5 (de) |
WO (1) | WO2010105646A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102836623A (zh) * | 2012-09-14 | 2012-12-26 | 天津万博伟业科技发展有限公司 | 分段式烟气净化处理及余热回收系统装置及使用方法 |
CN103611399A (zh) * | 2013-12-04 | 2014-03-05 | 无锡雪浪环境科技股份有限公司 | 一种危废焚烧烟气净化系统 |
CN109224804A (zh) * | 2018-10-17 | 2019-01-18 | 四川锐源能环科技有限公司 | 一种燃气超净排放系统 |
Families Citing this family (2)
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CN108786407B (zh) * | 2018-07-20 | 2020-07-14 | 江苏峰峰鸿运环保科技发展有限公司 | 一种环保用工业烟气净化处理设备 |
CN109228694B (zh) * | 2018-09-30 | 2021-03-02 | 苏州极数印花科技有限公司 | 单通道打印机烘干出料系统 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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DE3020016A1 (de) * | 1980-05-24 | 1981-12-10 | Heinz Ing.(grad.) 4390 Gladbeck Hölter | Verfahren zur nassen und trockenen, kombinierten gasreinigung, vorzugsweise zur so(pfeil abwaerts)2(pfeil abwaerts)-abscheidung hinter kraftwerksbloecken |
DE3113788A1 (de) * | 1980-05-24 | 1983-01-05 | Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck | Reaktivierung der trockenen chemisorptionsmassen innerhalb des verfahrensschrittes von trocken zu nass |
US4388281A (en) * | 1980-05-24 | 1983-06-14 | Hoelter Heinz | Noxious-component removal from flue gas and compositions useful therefor |
DE4237995A1 (en) * | 1991-11-28 | 1993-06-03 | Austrian Energy & Environment | Cleaning combustion waste gas by nitrogen and sulphur oxide(s) removal |
DE19512786A1 (de) * | 1994-04-29 | 1995-11-02 | Babcock & Wilcox Co | Verfahren zur Anlage zur SO¶2¶- und SO¶3¶-Steuerung durch Injektion eines trockenen Sorptionsmittels/Reagens und Naßgaswaschung |
EP2011558A1 (de) * | 2007-05-16 | 2009-01-07 | Babcock Noell GmbH | Anlage und Verfahren zum Entfernen von Schadstoffen aus Abgas |
-
2009
- 2009-03-20 WO PCT/EP2009/002086 patent/WO2010105646A1/de active Application Filing
- 2009-03-20 DE DE112009004982T patent/DE112009004982A5/de active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3020016A1 (de) * | 1980-05-24 | 1981-12-10 | Heinz Ing.(grad.) 4390 Gladbeck Hölter | Verfahren zur nassen und trockenen, kombinierten gasreinigung, vorzugsweise zur so(pfeil abwaerts)2(pfeil abwaerts)-abscheidung hinter kraftwerksbloecken |
DE3113788A1 (de) * | 1980-05-24 | 1983-01-05 | Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck | Reaktivierung der trockenen chemisorptionsmassen innerhalb des verfahrensschrittes von trocken zu nass |
US4388281A (en) * | 1980-05-24 | 1983-06-14 | Hoelter Heinz | Noxious-component removal from flue gas and compositions useful therefor |
DE4237995A1 (en) * | 1991-11-28 | 1993-06-03 | Austrian Energy & Environment | Cleaning combustion waste gas by nitrogen and sulphur oxide(s) removal |
DE19512786A1 (de) * | 1994-04-29 | 1995-11-02 | Babcock & Wilcox Co | Verfahren zur Anlage zur SO¶2¶- und SO¶3¶-Steuerung durch Injektion eines trockenen Sorptionsmittels/Reagens und Naßgaswaschung |
EP2011558A1 (de) * | 2007-05-16 | 2009-01-07 | Babcock Noell GmbH | Anlage und Verfahren zum Entfernen von Schadstoffen aus Abgas |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102836623A (zh) * | 2012-09-14 | 2012-12-26 | 天津万博伟业科技发展有限公司 | 分段式烟气净化处理及余热回收系统装置及使用方法 |
CN103611399A (zh) * | 2013-12-04 | 2014-03-05 | 无锡雪浪环境科技股份有限公司 | 一种危废焚烧烟气净化系统 |
CN103611399B (zh) * | 2013-12-04 | 2015-11-04 | 无锡雪浪环境科技股份有限公司 | 一种危废焚烧烟气净化系统 |
CN109224804A (zh) * | 2018-10-17 | 2019-01-18 | 四川锐源能环科技有限公司 | 一种燃气超净排放系统 |
CN109224804B (zh) * | 2018-10-17 | 2024-02-23 | 四川锐源能环科技有限公司 | 一种燃气超净排放系统 |
Also Published As
Publication number | Publication date |
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DE112009004982A5 (de) | 2012-10-11 |
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