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1. WO2002022238 - METHOD FOR CLEANING FLUE GASES BEHIND INCINERATORS

Publication Number WO/2002/022238
Publication Date 21.03.2002
International Application No. PCT/CH2000/000487
International Filing Date 11.09.2000
Chapter 2 Demand Filed 23.03.2002
IPC
B01D 53/50 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation 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 or aerosols
34Chemical or biological purification of waste gases
46Removing components of defined structure
48Sulfur compounds
50Sulfur oxides
B01D 53/75 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation 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 or aerosols
34Chemical or biological purification of waste gases
74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
75Multi-step processes
B01D 53/80 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation 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 or aerosols
34Chemical or biological purification of waste gases
74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
80Semi-solid phase processes, i.e. by using slurries
CPC
B01D 53/505
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation 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,
34Chemical or biological purification of waste gases
46Removing components of defined structure
48Sulfur compounds
50Sulfur oxides
501by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
505in a spray drying process
B01D 53/75
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation 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,
34Chemical or biological purification of waste gases
74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
75Multi-step processes
B01D 53/80
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation 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,
34Chemical or biological purification of waste gases
74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
80Semi-solid phase processes, i.e. by using slurries
Applicants
  • KOCH, Theodor [DE]/[CH]
Inventors
  • KOCH, Theodor
Agents
  • TROESCH SCHEIDEGGER WERNER AG
Priority Data
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN ZUM REINIGEN VON RAUCHGASEN HINTER FEUERUNGSANLAGEN
(EN) METHOD FOR CLEANING FLUE GASES BEHIND INCINERATORS
(FR) PROCEDE D'EPURATION DES GAZ DE FUMEE PROVENANT D'UNE INSTALLATION DE COMBUSTION
Abstract
(DE)
Das Verfahren zur Reinigung von Rauchgasen von Feuerungsanlagen (1) weist vorzugsweise drei nacheinandergeschaltete Reinigungsstufen auf. Jede Stufe weist einen Mischer oder Sprühabsorber (2; 4; 6) mit nachgeschaltetem Staubabscheider (3; 5; 7) auf. Jeder Mischer oder Sprühabsorber (2; 4; 6) wird aus einem Silo (9; 10; 11) dosiert mit Reaktionsmittel versorgt. Als Reaktionsmittel werden vornehmlich Kalkhydrate eingesetzt, welchen ggf. noch Aktivkohle und zusätzliche Additive beigefügt werden. Das frische, unverbrauchte Reaktionsmittel wird nur über das Silo (9) der letzten Stufe dem Prozess zugeführt, die übrigen Silos (10; 11) werden über Rückführungsleitungen (17) mit bereits verwendeten Reaktionsmitteln, die aus den Staubabscheidern (5; 7) der jeweils nächsten Stufe ausgeschieden werden, versorgt und in der benötigten Menge dem jeweiligen Mischer resp. Sprühabsorber (2; 4) zugeführt. Der mit dem geringsten Anteil an Schadstoffen belastete, bereits teilgereinigte Rauchgasstrom in der letzten Stufe wird damit vorteilhaft mit frischem Reaktionsmittel zusammengeführt, was einerseits zu einer besonders guten Restreinigung führt und andererseits auch bei bis zu dieser Stufe durchschlagenden Emissionsspitzen noch zu einer genügenden Reinigung führt.
(EN)
The method for cleaning flue gases of incinerators (1) preferably has a succession of three cleaning stages. Each stage has a mixer or spray absorber (2; 4; 6) with a dust collector (3; 5; 7) connected downstream. Each mixer or spray absorber (2; 4; 6) is supplied from a silo (9; 10; 11) which is dosed with reactant. Lime hydrates are used mainly as the reactant, and activated carbon and extra additives can also be added to these. The fresh, unused reactant is only supplied through the silo (9) of the last stage of the process, the remaining silos (10; 11) being supplied with used reactants by feedback lines (17), said used reactants having been separated out of the dust collectors (5; 7) of the next stage, respectively, and being fed to the respective mixer or spray absorber (2; 4) in the required quantity. The already partially cleaned flue gas stream in the last stage, which contains the lowest proportion of contaminants, is therefore advantageously brought into contact with the fresh reactant, which results in particularly good residual cleaning and to satisfactory cleaning even if as a result of emission peaks, contaminants are still present at this stage.
(FR)
Le procédé d'épuration de gaz de fumée provenant d'installations de combustion (1) comporte de préférence trois étages d'épuration agencés en série. Chaque étage présente un mélangeur ou un absorbeur à pulvérisation (2 ; 4 ; 6) avec des séparateurs de poussière (3 ; 5 ; 7) connectés en aval. Chaque mélangeur ou absorbeur à pulvérisation (2 ; 4 ; 6) est alimenté en substance réactive parvenant en quantités dosées en provenance d'un silo (9 ; 10 ; 11). On utilise comme substance réactive, principalement de la chaux hydratée à laquelle on incorpore éventuellement du charbon actif et des additifs. La substance réactive fraîche, non consommée, est introduite dans le cycle, via le silo (9) du dernier étage, les autres silos (10 ; 11) étant alimentés, via des conduites de recyclage (17), en substances réactives déjà utilisées, séparées en provenance des séparateurs de poussière (5 ; 7) de chaque étage suivant, et amenée, en quantités requises, aux mélangeurs et absorbeurs (2 ; 4) respectifs. Le courant de gaz de fumée circulant dans le dernier étage, déjà partiellement épuré, chargé d'une quantité minime de matières polluantes, mélangé avantageusement avec des substances réactives fraîches, est envoyé, d'une part, à une épuration finale particulièrement bonne et, d'autre part, à une épuration satisfaisante si, consécutivement aux pics d'émission, des matières polluantes sont encore présentes à ce stade.
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