WO1980000797A1 - Process and equipment for dust removing and absorption of harmful gases issuing from incinerators and hot air ovens - Google Patents
Process and equipment for dust removing and absorption of harmful gases issuing from incinerators and hot air ovens Download PDFInfo
- Publication number
- WO1980000797A1 WO1980000797A1 PCT/DE1979/000128 DE7900128W WO8000797A1 WO 1980000797 A1 WO1980000797 A1 WO 1980000797A1 DE 7900128 W DE7900128 W DE 7900128W WO 8000797 A1 WO8000797 A1 WO 8000797A1
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- Prior art keywords
- gas
- washing liquid
- sludge
- dust
- fresh water
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
- F27B1/18—Arrangements of dust collectors
Definitions
- the invention relates to a method for dedusting and harmful gas absorption, in particular absorption of hydrogen halide from exhaust gases. From waste incineration plants.
- the cleaning of the exhaust gases from incineration plants with hydrogen halide emissions is usually carried out dry for the suspended matter, i.e. hot electrostatic filters or hot tissue filters are used for this.
- gas is saturated and scrubbed with dilute acid, the concentration of which is regulated by the addition of fresh water. This determines the final purity of the exhaust gases.
- the SOp also contained in the exhaust gas is generally not yet absorbed today, but remains in the exhaust gas.
- the acid solution that arises during the absorption of hydrogen halide is neutralized separately and a hot neutral salt solution is produced as waste, which leads to very considerable wastewater problems, since it increases the salt load of the receiving waters (if discharge is made).
- the object of the invention is to provide a method and a system for dedusting and purifying exhaust gas, for example top gas, wherein hydrogen halides and, if appropriate, additional SO 2 are to be removed from the exhaust gas.
- the top gas emerging from the cupola furnace first arrives in a presaturator 1, where it is dedusted and, in the melting phase, is also cooled by evaporating fresh water.
- the top gas is then fed to a dryer / cooler / pre-absorber 2.
- the neutralizing agent and sludge from the circulating wash water contained in the subsequent washing stages are finely distributed, as a result of which fluorides and SO 2 are pre-separated, the blast furnace gas is further cooled and, on the other hand, the sludge is dried so that it is drier Waste sludge are removed can.
- the thus cooled and partially cleaned blast furnace gas is fed to a cyclone group 3 and freed from the dust and the reaction products.
- a universal Venturi scrubber 4 In the first stage of the washing process, the blast furnace gas is cooled with fresh water to the saturation point and washed. In the subsequent venturi washing process of the second stage of the scrubber, the top gas is washed with the separation of the residual dust and the alkaline washing of the remaining constituents of fluorides, hydrogen fluoride and SO 2 . The cleaned top gas is then available for further use in the extractor of the scrubber 4 I. For example, it can be used for combustion in the recuperator.
- a limescale milk generator is assigned to the scrubber 4, ie CaCO 3 passes from a limestone silo 5 into a mixer and from there as limestone milk into an oxidation basin 7.
- the washing liquid from the scrubber 4 is also introduced into this oxidation basin and the neutralization of the Wash water. Furthermore, the liquid in the oxidation basin is aerated for the conversion of CaCO 3 to CaCO 4 . Furthermore, a flocculant is added in this basin 7. The sludge water drawn off is fed to the dryer / cooler / pre-absorber 2 for injection. Clarified washing liquid is drawn off in the overflow of the basin 7 and is fed back to the scrubber 4. The process can also be carried out without the oxidation basin so that the sludge water from the scrubber 4 is enriched with neutralizing agent and then passed directly into the dryer / cooler / pre-absorber 2.
- FIG. 2 shows a flow diagram which almost completely corresponds to the diagram in FIG. 1.
- the dust bag is identified by 1 and the subsequent dryer or cooler by 2.
- the pre-dedusted hot exhaust gas emerging from the dust bag enters the dryer or cooler, where finely divided, sludge-containing cycle wash water is fed in for cooling and sludge drying .
- the gas then passes into cyclones 3, where the bulk of the dust remaining in the gas is separated. It is also possible for all of the dry residue (sludge) drawn off to be fed to the cyclones.
- the gas is fed from the cyclones to the scrubber 4, with cooling to the saturation point in a first stage of the washing process with fresh water and then the residual dust components being removed in a delicate wash, and the hydrogen halides and SO 2 in the system shown in FIG. 2 .
- the cleaned exhaust gas is then ready for further use on the extractor of the scrubber 4.
- a trigger fan is indicated here with 9.
- a lime silo 5 and a lime milk receiver 6 are assigned and the washing water passes from the washer 4 into a basin 7, where the neutralizing agent is simultaneously introduced from the lime milk receiver 6.
- the sludge water drawn off is fed to the dryer or cooler 2, while the clarified washing liquid is fed back into the scrubber 4.
- the ash is added to the lime milk reservoir 6 from the silo 10.
- the ash can come from an e-filter, which is usually the Combustion plants is connected downstream, that would be upstream of the plant shown in FIG. 2. If no ash is available, sand (quartz sand), for example, can also be easily added as a sludge-generating agent.
- a slightly modified method can be seen from FIG. 3, namely that a weakly acidic solution is used here in the washer and the clarified washing liquid is not returned from the neutralization basin 7 to the washer 4. In this procedure, only hydrogen halide is used, but not SO 2 deposited.
- the particular advantage of the process according to the invention is that when the common spray drying of salt solutions with suitable additives such as ash, a free-flowing, landfillable, dry product is obtained which does not cause any problems in waste disposal, such as occur in the case of acidic waste sludge.
- the method according to the invention can - as can be seen from the above explanations - carry out the overall cleaning of the gas from pollutants but also from suspended matter, i.e. it can also be applied to the separators present in the current incineration plants e.g. E-filters are dispensed with, in which case the "aggregate" is still contained in the exhaust gas and necessarily leads to the desired sludge formation during washing.
- the neutralization in basin 7 can be carried out with lime milk (as indicated) or another neutralizing agent.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
Verfahren und Anlage zur Entstaubung und Schadgasabsorption von Abgasen aus Abfallverbrennungsanlagen und Heißwindkupolöfen. Process and plant for dedusting and harmful gas absorption of exhaust gases from waste incineration plants and hot-wind cupola furnaces.
Die Erfindung betrifft ein Verfahren zur Entstaubung und Schadgasabsorption, insbesondere Absorption von Halogenwasserstoffen von Abgasen.aus Abfallverbrennungsanlagen.The invention relates to a method for dedusting and harmful gas absorption, in particular absorption of hydrogen halide from exhaust gases. From waste incineration plants.
Die Reinigung der Abgase aus Verbrennungsanlagen mit Halogenwasserstoffimissionen erfolgt in der Regel auf trockenem Wege für die Schwebstoffe, d.h. hierzu werden Heißelektrofilter oder Heißgewebefilter verwendet. Anschließend findet zur selektiven Absorption der Halogenwasserstoffe eine Gassättigung und Gaswäsche mit verdünnter Säure statt, deren Konzentration durch Frischwasserzugabe geregelt wird. Hierdurch wird die Endreinheit der Abgase bestimmt. Das außerdem im Abgas enthaltene SOp wird heute im allgemeinen noch nicht absorbiert, sondern verbleibt im Abgas. Die bei der Halogenwasserstoffabsorption entstehende Säurelösung wird getrennt neutralisiert und es fällt eine heiße neutrale Salzlösung als Abfall an, die zu ganz erheblichen Abwasserproblemen führt, da sie die Salzfracht der Vorfluter (sofern eine Einleitung erfolgt) erhöht.The cleaning of the exhaust gases from incineration plants with hydrogen halide emissions is usually carried out dry for the suspended matter, i.e. hot electrostatic filters or hot tissue filters are used for this. Subsequently, for the selective absorption of the hydrogen halides, gas is saturated and scrubbed with dilute acid, the concentration of which is regulated by the addition of fresh water. This determines the final purity of the exhaust gases. The SOp also contained in the exhaust gas is generally not yet absorbed today, but remains in the exhaust gas. The acid solution that arises during the absorption of hydrogen halide is neutralized separately and a hot neutral salt solution is produced as waste, which leads to very considerable wastewater problems, since it increases the salt load of the receiving waters (if discharge is made).
Soll auch der im Abgas enthaltene SO2-Gehalt absorbiert werden, so erhöht sich der Verbrauch von Neutralisationsmittel entsprechend und es fällt außer Salzlösung auch Salzschlamm an, der vor der Ableitung des Abwassers abzutrennen ist. Die Trocknung von Salzlösungen im direkten Kontakt mit heißen Gasen bereitet wegen der notwendigen Kristallisation erhebliche Probleme. Aufgabe der Erfindung ist es, ein Verfahren sowie eine Anlage zur Entstaubung und Reinigung von Abgas, z.B. Gichtgas, zu schaffen, wobei Halogenwasserstoffe und ggf. zusätzlich SO2 aus dem Abgas entfernt werden soll.If the SO 2 content contained in the exhaust gas is also to be absorbed, the consumption of neutralizing agent increases accordingly and, in addition to saline, salt sludge is also obtained, which must be separated off before the waste water is discharged. Drying salt solutions in direct contact with hot gases creates considerable problems due to the necessary crystallization. The object of the invention is to provide a method and a system for dedusting and purifying exhaust gas, for example top gas, wherein hydrogen halides and, if appropriate, additional SO 2 are to be removed from the exhaust gas.
Gelöst wird diese Aufgabe erfindungsgemäß durch die in den Patentansprüchen angegebenen Merkmale.According to the invention, this object is achieved by the features specified in the patent claims.
Die Erfindung soll nachstehendn an Hand von drei Flußdiagrammen erläutert werden.The invention will be explained below with the aid of three flow diagrams.
Dabei zeigtIt shows
Fig. 1 die Anwendung des erfindungsgemäßen Verfahrens bei der Entstaubung und Reinigung von Gichtgas eines Kupolofens,1 shows the use of the method according to the invention in the dedusting and cleaning of blast furnace gas from a cupola furnace,
Fig. 2 und 3 zwei Abwandlungen für die Entstaübung und Reinigung von Abgasen einer Abfallverbrennungsanlage.2 and 3 two modifications for the dedusting and cleaning of exhaust gases from a waste incineration plant.
Das aus dem Kupolofen austretende Gichtgas gelangt zunächst in einen Vorsättiger 1, wo es vorentstaubt und in der Phase des Niederschmelzens auch durch verdampfendes Frischwasser abgekühlt wird. Danach wird das Gichtgas einem Trockner/Kühler/Vorabsorber 2 zugeleitet. Hier wird das Neutralisationsmittel und Schlamm aus dem aus den nachfolgenden Waschstufen enthaltenen Kreis-lauf-Waschwasser fein verteilt, wodurch eine Vorabscheidung von Fluoriden sowie SO2 erfolgt, ferner das Gichtgas eine weitere Abkühlung erfährt und andererseits der Schlamm getrocknet wird, so daß er als trockener Abfallschlamm abgezogen werden kann. Das so gekühlte und teilweise gereinigte Gichtgas wird einer Zyklonengruppe 3 zugeführt und dort vom Hau tteil des Staubes und der Reaktionsprodukte befreit. Anschließend gelangt es in einen Universal-Venturi-Wäscher 4. Dort wird das Gichtgas in der ersten Stufe des Waschverfahrens mit Frischwasser bis zum Sättigungspunkt abgekühlt und gewaschen. Im anschließenden Venturi-Waschprozeß der zweiten Stufe des Wäschers erfolgt die Feinwäsche des Gichtgases mit der Abscheidung des Reststaubes und die alkalische Wäsche der Restbestandteile an Fluoriden, Fluorwasserstoffen und SO2. Das gereinigte Gichtgas steht dann zur weiteren Verwendung im Abzug des Wäschers 4 Izur Verfügung. Beispielsweise kann es für die Verbrennung im Rekuperator eingesetzt werden. Dem Wäscher 4 ist ein Kalkmilcherzeuger zugeordnet, d.h. aus einem Kalksilo 5 gelangt CaCO3 in einen Mischer und von dort als Kalkmilch in ein Oxidations- becken 7. In dieses Oxidationsbecken wird auch die Waschflüssigkeit aus dem Wäscher 4 eingeleitet und es erfolgt dort die Neutralisation des Waschwassers. Weiterhin erfährt die Flüssigkeit im Oxidationsbecken eine Belüftung zwecks Umsatz von CaCO3 zu CaCO4. Ferner wird in diesem Becken 7 ein Flockungsmittel zugesetzt. Das abgezogene Schlammwasser wird dem Trockner/Kühler/Vorabsorber 2 zur Eindüsung zugeleitet. Im Überlauf des Beckens 7 wird geklärte Waschflüssigkeit abgezogen, die wieder dem Wäscher 4 zugeleitet wird. Der Prozeß kann unterVerzicht auf das Oxidationsbecken auch so geführt werden, daß das Schlammwasser aus dem Wäscher 4 mit Neutralisationsmittel angereichert und danach direkt in den Trockner/Kühler/Vorabsorber 2 geleitet wird.The top gas emerging from the cupola furnace first arrives in a presaturator 1, where it is dedusted and, in the melting phase, is also cooled by evaporating fresh water. The top gas is then fed to a dryer / cooler / pre-absorber 2. Here, the neutralizing agent and sludge from the circulating wash water contained in the subsequent washing stages are finely distributed, as a result of which fluorides and SO 2 are pre-separated, the blast furnace gas is further cooled and, on the other hand, the sludge is dried so that it is drier Waste sludge are removed can. The thus cooled and partially cleaned blast furnace gas is fed to a cyclone group 3 and freed from the dust and the reaction products. It then passes into a universal Venturi scrubber 4. In the first stage of the washing process, the blast furnace gas is cooled with fresh water to the saturation point and washed. In the subsequent venturi washing process of the second stage of the scrubber, the top gas is washed with the separation of the residual dust and the alkaline washing of the remaining constituents of fluorides, hydrogen fluoride and SO 2 . The cleaned top gas is then available for further use in the extractor of the scrubber 4 I. For example, it can be used for combustion in the recuperator. A limescale milk generator is assigned to the scrubber 4, ie CaCO 3 passes from a limestone silo 5 into a mixer and from there as limestone milk into an oxidation basin 7. The washing liquid from the scrubber 4 is also introduced into this oxidation basin and the neutralization of the Wash water. Furthermore, the liquid in the oxidation basin is aerated for the conversion of CaCO 3 to CaCO 4 . Furthermore, a flocculant is added in this basin 7. The sludge water drawn off is fed to the dryer / cooler / pre-absorber 2 for injection. Clarified washing liquid is drawn off in the overflow of the basin 7 and is fed back to the scrubber 4. The process can also be carried out without the oxidation basin so that the sludge water from the scrubber 4 is enriched with neutralizing agent and then passed directly into the dryer / cooler / pre-absorber 2.
Damit läuft das ganze Verfahren in einem geschlossenen Kreislauf, dem von außen lediglich - abgesehen vom Gichtgas - Frischwasser und Kalk zugeführt werden, während trockene Abfallprodukte (Schlamm) entstehen.The entire process thus runs in a closed cycle, to which fresh water and lime are only supplied from the outside - apart from the blast furnace gas - while dry waste products (sludge) are produced.
In der Figur 2 ist ein Flußdiagramm dargestellt, das nahezu vollständig mit dem Diagramm der Figur 1. übereinstimmt. Lediglich erfolgt im Unterschied zu der Reinigung und Entstaubung von Gichtgas bei dem vorliegenden Verfahren im ersten Verfahrensschritt nur eine Vorentstabung und keine Abkühlung. Im einzelnen ist in dem Diagramm der Staubsack mit 1 bezeichnet und der anschließende Trockner, bzw. Kühler mit 2. Das aus dem Staubsack austretende vorentstaubte heiße Abgas gelangt in den Trockner bzw. Kühler, wo von oben feinstverteiltes schlammhaltiges Kreislaufwaschwasser zur Abkühlung und Schlammtrocknung eingegeben wird. Das Gas gelangt dann in Zyklone 3, wo eine Abscheidung des Hauptteiles des im Gas zurückgebliebenen Staubes erfolgt. Möglich ist auch, daß der gesamte abgezogene trockene Rückstand (Schlamm) den Zyklonen zugeführt wird. Von den Zyklonen wird das Gas dem Wäscher 4 zugeleitet, wobei hier in einer ersten Stufe des Waschverfahrens mit Frischwasser eine Abkühlung bis zum Sättigungspunkt erfolgt und danach in einer Feinwäsche die Reststaubanteile entfernt werden, sowie bei der in Figur 2 dargestellten Anlage die Halogenwasserstoffe und SO2. Das gereinigte Abgas steht dann zur weiteren Verwendung am Abzug des Wäschers 4 bereit. Ein Abzugsgebläse ist hier mit 9 angedeutet. Im Wäscher 4 ist ein Kalksilo 5 sowie eine Kalkmilchvorlage 6 zugeordnet und das Waschwasser gelangt aus dem Wäscher 4 in ein Becken 7, wo gleichzeitig aus der Kalkmilchvorlage 6 das Neutralisationsmittel eingeleitet wird. Das abgezogene Schlammwasser wird dem Trockner bzw. Kühler 2 zugeleitet, während die geklärte Waschflüssigkeit wieder in den Wäscher 4 eingeleitet wird. Je nach dem Staubanteil im Abgas ist es notwendig zur Erzeugung einer SchlammMenge Asche zuzusetzen. Bei dem in Figur 2 dargestellten Verfahren erfolgt die Aschezugabe in die Kalkmilchvorlage 6 aus dem Silo 10. Möglich ist aber auch die Zugabe von Asche vor Einleitung in den Trockner bzw. Kühler 2. Die Asche kann aus einem E-Filter stammen, der üblicherweise der Verbrennungsanläge nachgeschaltet ist, d.h. der vorliegenden in der Figur 2 dargestellten Anlage dann vorgeschaltet wäre. Sollte keine Asche zur Verfügung stehen, so kann auch ohne weiteres beispielsweise Sand (Quarzsand) als schlammerzeugendes Mittel zugesetzt werden.FIG. 2 shows a flow diagram which almost completely corresponds to the diagram in FIG. 1. In contrast to the cleaning and dedusting of blast furnace gas in the present method, only a preliminary de-stripping and no cooling takes place in the first process step. In the diagram, the dust bag is identified by 1 and the subsequent dryer or cooler by 2. The pre-dedusted hot exhaust gas emerging from the dust bag enters the dryer or cooler, where finely divided, sludge-containing cycle wash water is fed in for cooling and sludge drying . The gas then passes into cyclones 3, where the bulk of the dust remaining in the gas is separated. It is also possible for all of the dry residue (sludge) drawn off to be fed to the cyclones. The gas is fed from the cyclones to the scrubber 4, with cooling to the saturation point in a first stage of the washing process with fresh water and then the residual dust components being removed in a delicate wash, and the hydrogen halides and SO 2 in the system shown in FIG. 2 . The cleaned exhaust gas is then ready for further use on the extractor of the scrubber 4. A trigger fan is indicated here with 9. In the scrubber 4, a lime silo 5 and a lime milk receiver 6 are assigned and the washing water passes from the washer 4 into a basin 7, where the neutralizing agent is simultaneously introduced from the lime milk receiver 6. The sludge water drawn off is fed to the dryer or cooler 2, while the clarified washing liquid is fed back into the scrubber 4. Depending on the amount of dust in the exhaust gas, it is necessary to add ash to generate a sludge. In the process shown in FIG. 2, the ash is added to the lime milk reservoir 6 from the silo 10. However, it is also possible to add ash before being introduced into the dryer or cooler 2. The ash can come from an e-filter, which is usually the Combustion plants is connected downstream, that would be upstream of the plant shown in FIG. 2. If no ash is available, sand (quartz sand), for example, can also be easily added as a sludge-generating agent.
Aus der Figur 3 ist ein geringfügig abgewandeltes Verfahren zu ersehen, und zwar wird hier im Wäscher mit einer schwach sauren Lösung gearbeitet und es erfolgt keine Rückleitung der geklärten Waschflüssigkeit aus Neutralisationsbecken 7 in den Wäscher 4. Bei dieser Verfahrensweise wird dann nur Halogenwasserstoff nicht aber SO2 abgeschieden. Der besondere Vorteil des erfindungsgemäßen Verfahrens ist, daß bei der gemeinsamen Zerstäubungstrocknung von Salzlösungen mit geeigneten Zuschlagstoffen wie beispielsweise Asche, ein rieselfähiges, deponierfähiges, trockenes Produkt anfällt, das keine Probleme bei der Abfallbeseitigung, wie sie bei saurem Abfallschlamm entstehen, bereitet.A slightly modified method can be seen from FIG. 3, namely that a weakly acidic solution is used here in the washer and the clarified washing liquid is not returned from the neutralization basin 7 to the washer 4. In this procedure, only hydrogen halide is used, but not SO 2 deposited. The particular advantage of the process according to the invention is that when the common spray drying of salt solutions with suitable additives such as ash, a free-flowing, landfillable, dry product is obtained which does not cause any problems in waste disposal, such as occur in the case of acidic waste sludge.
Das erfindungsgemäße Verfahren kann - wie sich aus den obigen Ausführungen ergibt - die Gesamtreinigung des Gases von Schadstoffen aber auch von Schwebestoffen vornehmen, d.h. es kann auch auf die bei den jetzigen Verbrennungsanlagen vorhandenen Abscheider z.B. E-Filter verzichtet werden, wobei dann der "Zuschlagstoff" noch im Abgas enthalten ist und zwingend bei der Wäsche zu der gewünschten Schlammbildung führt.The method according to the invention can - as can be seen from the above explanations - carry out the overall cleaning of the gas from pollutants but also from suspended matter, i.e. it can also be applied to the separators present in the current incineration plants e.g. E-filters are dispensed with, in which case the "aggregate" is still contained in the exhaust gas and necessarily leads to the desired sludge formation during washing.
Es sei noch darauf hingewiesen, daß die Neutralisation im Becken 7 mit Kalkmilch (wie angegeben) oder auch einem anderen Neutralisationsmittel erfolgen kann. It should also be pointed out that the neutralization in basin 7 can be carried out with lime milk (as indicated) or another neutralizing agent.
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2846457 | 1978-10-23 | ||
| DE19782846457 DE2846457C2 (en) | 1978-10-23 | 1978-10-23 | Process and system for furnace gas dedusting and harmful gas absorption for a hot blast cupola furnace |
| DE19792929974 DE2929974A1 (en) | 1979-07-20 | 1979-07-20 | Incinerator and cupola furnace gases purification - in pre-absorber, cyclones, venturi scrubber and oxidation basin for dust and toxic gas removal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1980000797A1 true WO1980000797A1 (en) | 1980-05-01 |
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ID=25776213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1979/000128 Ceased WO1980000797A1 (en) | 1978-10-23 | 1979-10-23 | Process and equipment for dust removing and absorption of harmful gases issuing from incinerators and hot air ovens |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1980000797A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0230139A1 (en) * | 1986-01-17 | 1987-07-29 | A/S Niro Atomizer | Method for cleaning of a hot flue gas stream from waste incineration |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2261799A1 (en) * | 1974-02-21 | 1975-09-19 | Bischoff Gasreinigung | |
| FR2409080A1 (en) * | 1977-11-17 | 1979-06-15 | Ciba Geigy Ag |
-
1979
- 1979-10-23 WO PCT/DE1979/000128 patent/WO1980000797A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2261799A1 (en) * | 1974-02-21 | 1975-09-19 | Bischoff Gasreinigung | |
| FR2409080A1 (en) * | 1977-11-17 | 1979-06-15 | Ciba Geigy Ag |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0230139A1 (en) * | 1986-01-17 | 1987-07-29 | A/S Niro Atomizer | Method for cleaning of a hot flue gas stream from waste incineration |
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| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Designated state(s): JP US |