DE3118478A1 - Process for cleaning chemisorption filters, preferably for removing SO2 downstream of power stations, waste incineration plants and the like - Google Patents
Process for cleaning chemisorption filters, preferably for removing SO2 downstream of power stations, waste incineration plants and the likeInfo
- Publication number
- DE3118478A1 DE3118478A1 DE19813118478 DE3118478A DE3118478A1 DE 3118478 A1 DE3118478 A1 DE 3118478A1 DE 19813118478 DE19813118478 DE 19813118478 DE 3118478 A DE3118478 A DE 3118478A DE 3118478 A1 DE3118478 A1 DE 3118478A1
- Authority
- DE
- Germany
- Prior art keywords
- chemisorption
- cleaning
- filter
- filters
- downstream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
Description
Beschreibung und Erläuterung zur Zusatz-PatentanmeldungDescription and explanation of the additional patent application
"Verfahren zur Reinigung von Chemisorptionsfiltern, vorzugsweise zur Abscheidung von S02 hinter Kraftwerken, Müllverbrennungsanlagen und dergleichen" Zusatz zu P 30 20 049.8 In der Hauptanmeldung P 30 20 049.8 wird ein Chemisorptionsfilter beschrieben, der so im Verfahren gereinigt wird, daß nicht mehr als 2 % der Filterflächen gleichzeitig in Abreinigung stehen und das Rohgas von oben nach unten mit den Chemisorptionsmassen in den Filter einfallend geführt wird, wobei gleichzeitig die Reinigungsintensität, vorzugsweise in der Abhängigkeit von der Rohgasbelastung mit mehr oder weniger groBen Zeitamplituden, durch Rüttel- oder Blaszeitveränderungen erfordernisgerecht geregelt werden."Process for cleaning chemisorption filters, preferably for Separation of S02 behind power plants, waste incineration plants and the like " Addition to P 30 20 049.8 In the main application P 30 20 049.8 a chemisorption filter described, which is cleaned in the process that no more than 2% of the filter area are at the same time in cleaning and the raw gas from top to bottom with the chemisorption masses is guided into the filter, whereby at the same time the cleaning intensity, preferably depending on the raw gas load with more or less large Time amplitudes, regulated by changes in the vibration or blowing time, as required will.
Der für die Chemisorptionsfilter übliche Stand der Technik ist, daß die Chemisorptionsfilter in ihrer Sorptionsleistung von der immer richtigen und gleichmäßigen Größe der auf dem Filter aufgebauten Chemisorptionsschicht abhängig sind.The prior art for chemisorption filters is that the chemisorption filters in their sorption performance are always correct and uniform size of the chemisorption layer built up on the filter are.
Andererseits ist eine zu große, d.h. dicke Sorptionsschicht schädlich, da sich dadurch ein zu großer Filterwiderstand aufbaut. Der Aufbau der Sorptionsschicht ist natürlich auch sehr stark abhängig von dem eigentlichen Chemisorptionsmittel, der Körnung des Chemisorptionsmittels, der Feuchte des Gases, der Temperatur des Gases, der spezifischen Filterflächenbelastung und nicht zuletzt auch von der Vorfeuchte des Chemisorptionsmittels und somit seiner Agglomerisationsfähigkeit und seinem Sorptionsgrad.On the other hand, too large, i.e. thick, sorption layer is harmful, because this builds up too great a filter resistance. The structure of the sorption layer is of course very dependent on the actual chemisorbent, the grain size of the chemisorbent, the humidity of the gas, the temperature of the Gas, the specific filter surface loading and, last but not least, the pre-moisture of the chemisorbent and thus its ability to agglomerate and its Degree of sorption.
Das führt dazu, daß in der Praxis kaum konstante und gleichmäßig starke Chemisorptionsschichten auf den Filterflächen erzielbar sind.This leads to the fact that in practice there are hardly any constant and uniform strengths Chemisorption layers can be achieved on the filter surfaces.
Bei zu hohen Widerständen hat man bisher in einfachster Weise den Reinigungsmechanismus, über den Druckverlust des Filters gesteuert, ein- oder ausgeschaltet.If the resistance is too high, the easiest way up to now is Cleaning mechanism, controlled by the pressure drop in the filter, switched on or off.
Dieses führt vielfach auch dazu, daß die Reinigungsimpulse stärker auszuführen sind, als es normalerweise für den Filterwiderstand und die notwendige Reinigung erforderlich sein müßte.This often leads to the cleaning impulses being stronger than is normally necessary for the filter resistance and the Cleaning should be required.
Der Nachteil zu starker Impulse oder von überhöhten Rüttelungen liegt darin begründet, daß die benachbarten Filter, die frische Sorptionsmassen gerade aufgelegt bekommen haben, mit beaufschlagt werden und somit einer in Hitleidenschaft gezogenen Reinigung unterliegen, die nicht gewünscht ist, da hier die Chemisorption stark negativ beeinträchtigt wird.The disadvantage is too strong impulses or excessive vibrations based on the fact that the neighboring filter, the fresh sorbent masses straight have got hung up, are acted upon and thus one hit subject to drawn cleaning, which is not desired, since chemisorption here is severely adversely affected.
Erfindungsgemäß wird daher vorgeschlagen, mit gleichmäßigen, relativ schwachen und daher für die Chemisorption optimalen Reinigunzsimpulsen über den gesamten Zeitraum der Chemisorotionstätigkeit des Filters abzureinigen und bei sich veränderndem Fi]terwiderstand die Impulsdauer und auch die Impulsamplitude nicht zu verändern, sondern die Impulsfrequenz proportional zum Filterwiderstand. variiert wird, so daß ein ständiger, den Erfordernissen angepaßter Reinigungseffekt mit optimaler Impulsgestaltung stattfinden kann.According to the invention it is therefore proposed, with uniform, relatively weak and therefore optimal cleaning impulses for chemisorption via the entire Period of chemical erosion activity of the filter to be cleaned and when the filter resistance changes, the pulse duration and also the pulse amplitude not to be changed, but the pulse frequency proportional to the filter resistance. is varied, so that a constant, the requirements adapted cleaning effect can take place with optimal impulse design.
Hierdurch wird gewährleistet, daß durch die sich selbsttätig einstellende Reinigungsfrequenz der Filter einen gleichbleibenden Widerstand, d.h.This ensures that the self-adjusting Cleaning frequency of the filter has a constant resistance, i.
gleichmäßige Sorptionsschichten aufweist.has uniform sorption layers.
Dadurch ist auch eine gleichbleibende Chemisorptionsschicht auf den gesamten Filterflächen ständig garantiert.As a result, there is also a constant chemisorption layer on the guaranteed throughout the entire filter area.
Die Einrichtung zur Durchführung eines solchen Verfahrens besteht aus einem Differenzdruckgeber, der den Filterwiderstand ermittelt und einem essumformer, der ein analogisch elektrisches Signal zur Steuerung der Frequenz des Taktgebers liefert.The facility to carry out such a procedure exists from a differential pressure transducer that the filter resistance is determined and an essumformer, the an analog electrical signal to control the Frequency of the clock supplies.
Hiermit wird gewährleistet, daß sich die Reinigungsfrequenz ständig und stufenlos, entsprechend dem Filterwiderstand, ändert.This ensures that the cleaning frequency is constant and changes continuously according to the filter resistance.
Hierdurch ist dann gewährleistet, daß sich der Filter auf einen konstanten Arbeits-Wert, auch bei schwankenden Vorbelastungen, grundsätzlich einstellt.This then ensures that the filter is constant Work value, even with fluctuating previous loads, is always set.
Zusatz-Patentansprüche:Additional claims:
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813118478 DE3118478A1 (en) | 1980-05-24 | 1981-05-09 | Process for cleaning chemisorption filters, preferably for removing SO2 downstream of power stations, waste incineration plants and the like |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803020049 DE3020049A1 (en) | 1980-05-24 | 1980-05-24 | Chemisorption filter for gas purificn. - has small area being cleaned, giving large available area for reaction |
DE19813118478 DE3118478A1 (en) | 1980-05-24 | 1981-05-09 | Process for cleaning chemisorption filters, preferably for removing SO2 downstream of power stations, waste incineration plants and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3118478A1 true DE3118478A1 (en) | 1982-11-25 |
Family
ID=25785695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19813118478 Withdrawn DE3118478A1 (en) | 1980-05-24 | 1981-05-09 | Process for cleaning chemisorption filters, preferably for removing SO2 downstream of power stations, waste incineration plants and the like |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3118478A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19532862A1 (en) * | 1995-09-06 | 1997-03-13 | Graf Epe Gmbh | Plant cleaning waste gases by solids contacting in recirculated fluidised bed |
US5785936A (en) * | 1994-12-02 | 1998-07-28 | Northeastern University | Simultaneous control of SO2, NOx, HCl, and particulates by in-furnace high-temperature sorbent injection and particulate removal |
DE19802622A1 (en) * | 1998-01-24 | 1999-07-29 | Knecht Filterwerke Gmbh | Filtration of potentially explosive, dust-laden, air stream |
-
1981
- 1981-05-09 DE DE19813118478 patent/DE3118478A1/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5785936A (en) * | 1994-12-02 | 1998-07-28 | Northeastern University | Simultaneous control of SO2, NOx, HCl, and particulates by in-furnace high-temperature sorbent injection and particulate removal |
DE19532862A1 (en) * | 1995-09-06 | 1997-03-13 | Graf Epe Gmbh | Plant cleaning waste gases by solids contacting in recirculated fluidised bed |
DE19802622A1 (en) * | 1998-01-24 | 1999-07-29 | Knecht Filterwerke Gmbh | Filtration of potentially explosive, dust-laden, air stream |
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Legal Events
Date | Code | Title | Description |
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AF | Is addition to no. |
Ref country code: DE Ref document number: 3020049 Format of ref document f/p: P |
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8141 | Disposal/no request for examination |