EP0498072B1 - Laboratory gas scrubber - Google Patents
Laboratory gas scrubber Download PDFInfo
- Publication number
- EP0498072B1 EP0498072B1 EP91121667A EP91121667A EP0498072B1 EP 0498072 B1 EP0498072 B1 EP 0498072B1 EP 91121667 A EP91121667 A EP 91121667A EP 91121667 A EP91121667 A EP 91121667A EP 0498072 B1 EP0498072 B1 EP 0498072B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cabinet
- inner housing
- laboratory
- gas scrubber
- laboratory gas
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
- B08B15/023—Fume cabinets or cupboards, e.g. for laboratories
Definitions
- the invention relates to a laboratory gas scrubber for separating soluble noxious gases, which comprises a housing with a packing zone, a spray zone arranged above it and an agglomeration zone arranged above the spray zone, the housing having an inlet connection for exhaust air to be cleaned coming out of a laboratory fume cupboard and an outlet connection for the cleaned one Exhaust air includes.
- the exhaust air is driven through the zones of the laboratory gas scrubber by a fan which is arranged at a suitable point and is not the subject of the protection.
- Such a laboratory gas scrubber is already known from DE-GM 88 16 043 by the same owner.
- This well-known laboratory gas scrubber is hereby further developed.
- the invention has for its object to design the structure of the laboratory gas scrubber and the arrangement of its components so that a reduction in dimensions, in particular the height of the laboratory gas scrubber is made possible and it can be assigned to a fume cupboard in such a way that it is right next to the fume cupboard.
- the housing is designed as an inner housing of a cabinet, that the inner housing is arranged in the upper part of the cabinet, that the inlet connector and the outlet connector are guided through the walls of the cabinet to the outside and that the cabinet in one part in its lower part Washer fluid tank, a submersible pump immersed in it and a control cabinet with the electrical control and regulating devices for the operation of the laboratory gas scrubber, so that the cabinet as a closed assembly can be assigned to one or more fume cupboards.
- the individual packing elements of the packing zone lie on a grating.
- the spraying zone comprises one or more downward and / or upward directed nozzles which are provided with the washing liquid desired in each case via a circulation pump.
- the agglomeration zone is a wide-mesh filter with low pressure loss, in which suspended particles as well as, in particular, finely divided mist of the washing liquid are combined to form larger drops.
- the inlet connection is arranged laterally in the upper end of the inner housing and is guided through the side wall of the cabinet and is connected within the inner housing via a downwardly extending shaft to the inlet side of the packing zone.
- the laboratory gas scrubber is then provided with a second inlet connector in the upper end of the inner housing, which is led to the outside through the side wall of the inner housing opposite the first inlet connector and through the side wall of the cabinet adjacent to it.
- laboratory gas scrubber according to the invention can also be easily assigned to three fume cupboards and supply them, as has been shown in practice.
- the laboratory gas scrubber is provided with a third inlet connection in the upper end of the inner housing, which passes through and through the roof wall of the inner housing neighboring roof wall of the cabinet is guided upwards and outwards.
- a correspondingly designed pipeline then leads from this inlet connection to the outlet opening at the upper end of the third fume cupboard.
- a viewing window is preferably provided in the front wall of the inner housing and an outer viewing window is provided in the front wall of the cabinet to allow viewing of this viewing window.
- the laboratory gas scrubber shown in FIGS. 1 to 3 comprises a cabinet 1 which contains in its lower part a washing liquid tank 3, a submersible pump 5 immersed in it and a control cabinet 4 with the electrical control and regulating devices for the operation of the laboratory gas scrubber.
- a cabinet 1 which contains in its lower part a washing liquid tank 3, a submersible pump 5 immersed in it and a control cabinet 4 with the electrical control and regulating devices for the operation of the laboratory gas scrubber.
- In the upper part of this cabinet there is an inner housing 2 with inlet connections 10, 10 'and 10''arranged at its upper end, which serve to connect one or two or three laboratory fume cupboards close to one another. If not all three inlet sockets are needed, the others are covered with caps.
- Such a closure cap 14 is shown in FIG. 2 on the inlet connection 10 ′′ not required there.
- an outlet connection 9 for the cleaned exhaust air in its roof wall which is connected to the chimney for the exhaust air by a corresponding pipe via a fan.
- This outlet nozzle is also passed through the roof wall of the cabinet 1.
- the inner housing 2 there is also, as indicated in Fig. 2, a vertical partition 12.
- the aforementioned inlet connection 10, 10 'and 10''at the upper end of the inner housing 2 are on one side of this partition 12, so that the through the inlet pipe to be cleaned exhaust air is guided along this partition 12 to the lower end of the inner housing 2 and there, as can be seen from FIG. 2, enters the packing zone 6 on the underside. From there, the exhaust air first reaches the spray zone 7, which is supplied with washing liquid via a cross line 18, and then into the agglomeration zone 8 and from there into the outlet nozzle 9.
- a viewing window 11 in the wall of the inner housing, at the height between the packing zone and the spraying zone, and a viewing window 11 ′ in alignment with this viewing window in the cabinet 1 permit observation of the interior of the inner housing during operation.
- the washing liquid 13 required for the spraying zone is contained in the washing liquid tank 3 already mentioned at the bottom of the cabinet 1.
- the suction nozzle of a submersible pump 5 arranged above the washing liquid tank is immersed in this liquid.
- the submersible pump sucks washing liquid via a valve 15 into a riser line 17 which supplies the above-mentioned cross line 18.
- the pressure can be checked by a pressure gauge 16 connected to the line.
- the inlet ports 10, 10 ', 10' ' are sprayed through an additional nozzle 20 in order to prevent concentrated perchloric acid or its salts from being able to accumulate within the suction channels.
- These nozzles 20, one of which is shown in FIGS. 1 and 2, are supplied by an additional line 19 connected to the riser 17.
- the washing liquid flowing out of the spraying zone or the nozzles 20 passes back into the washing liquid tank 3 through a return line 21 starting from the bottom of the inner housing 2.
- the control cabinet 4 can be pulled out of the cabinet for maintenance purposes.
- Fig. 4 are on both sides of the laboratory gas washer 1 two fume cupboards 29 and 30 with the usual front sliding windows 31 and 32 and corresponding openings in the rear part at the upper end, into which the inlet connections 10 and 10 'of the laboratory gas washer enter.
- Fig. 5 shows a front view of this assembly.
- FIG. 6 shows a laboratory gas scrubber cabinet 1 with two laboratory fume cupboards 29 and 30 arranged on both sides and a third laboratory fume cupboard 33.
- This third fume cupboard is connected by an upper connecting piece 37 and a connecting pipe 38 to the upper inlet piece 10 ′′ of the laboratory gas scrubber.
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- Separation Of Particles Using Liquids (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
Die Erfindung betrifft einen Laborgaswäscher zur Abscheidung löslicher Schadgase, welcher ein Gehäuse mit einer Füllkörperzone, einer darüber angeordneten Bedüsungszone und einer über der Bedüsungszone angeordneten Agglomerationszone umfaßt, wobei das Gehäuse einen Eintrittsstutzen für aus einem Laborabzug austretende, zu reinigende Abluft und einen Austrittsstutzen für die gereinigte Abluft umfaßt.The invention relates to a laboratory gas scrubber for separating soluble noxious gases, which comprises a housing with a packing zone, a spray zone arranged above it and an agglomeration zone arranged above the spray zone, the housing having an inlet connection for exhaust air to be cleaned coming out of a laboratory fume cupboard and an outlet connection for the cleaned one Exhaust air includes.
Die Abluft wird durch die Zonen des Laborgaswäschers durch einen an geeigneter Stelle angeordneten Ventilator getrieben, der nicht Gegenstand des Schutzes ist.The exhaust air is driven through the zones of the laboratory gas scrubber by a fan which is arranged at a suitable point and is not the subject of the protection.
Ein solcher Laborgaswäscher ist bereits durch das DE-GM 88 16 043 desselben Inhabers bekannt geworden. Dieser bekannte Laborgaswäscher wird hiermit weiterentwickelt. Der Erfindung liegt die Aufgabe zugrunde, den Aufbau des Laborgaswäschers und die Anordnung seiner Bauelemente so zu gestalten, daß eine Verringerung der Dimensionen, insbesondere der Höhe des Laborgaswäschers ermöglicht wird und man ihn einem Laborabzug derart zuordnen kann, daß er direkt neben dem Abzug steht.Such a laboratory gas scrubber is already known from DE-GM 88 16 043 by the same owner. This well-known laboratory gas scrubber is hereby further developed. The invention has for its object to design the structure of the laboratory gas scrubber and the arrangement of its components so that a reduction in dimensions, in particular the height of the laboratory gas scrubber is made possible and it can be assigned to a fume cupboard in such a way that it is right next to the fume cupboard.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Gehäuse als Innengehäuse eines Schranks ausgebildet ist, daß das Innengehäuse im Oberteil des Schranks angeordnet ist, daß der Eintrittsstutzen und der Austrittsstutzen durch die Wände des Schranks nach außen geführt sind und daß der Schrank in seinem Unterteil einen Waschflüssigkeitstank, eine in diesen eintauchende Tauchpumpe und einen Schaltschrank mit den elektrischen Steuer- und Regelgeräten für den Betrieb des Laborgaswäschers aufweist, so daß der Schrank als geschlossene Baugruppe einem oder mehreren Laborabzügen zugeordnet werden kann. Die einzelnen Füllkörper der Füllkörperzone liegen auf einem Gitterrost.The object is achieved in that the housing is designed as an inner housing of a cabinet, that the inner housing is arranged in the upper part of the cabinet, that the inlet connector and the outlet connector are guided through the walls of the cabinet to the outside and that the cabinet in one part in its lower part Washer fluid tank, a submersible pump immersed in it and a control cabinet with the electrical control and regulating devices for the operation of the laboratory gas scrubber, so that the cabinet as a closed assembly can be assigned to one or more fume cupboards. The individual packing elements of the packing zone lie on a grating.
Die Bedüsungszone umfaßt eine oder mehrere nach unten und/oder nach oben gerichtete Düsen, die über eine Umwälzpumpe mit der jeweils gewünschten Waschflüssigkeit versehen werden.The spraying zone comprises one or more downward and / or upward directed nozzles which are provided with the washing liquid desired in each case via a circulation pump.
Die Agglomerationszone stellt ein weitmaschiges Filter mit geringem Druckverlust dar, in dem mitgeführte Schwebeteilchen sowie insbesondere feinverteilte Nebel der Waschflüssigkeit zu größeren Tropfen zusammengefaßt werden.The agglomeration zone is a wide-mesh filter with low pressure loss, in which suspended particles as well as, in particular, finely divided mist of the washing liquid are combined to form larger drops.
Vorzugsweise ist dabei vorgesehen, daß der Eintrittsstutzen im oberen Ende des Innengehäuses seitlich angeordnet und durch die Seitenwand des Schranks geführt ist und innerhalb des Innengehäuses über einen abwärts verlaufenden Schacht mit der Eintrittsseite der Füllkörperzone verbunden ist.It is preferably provided that the inlet connection is arranged laterally in the upper end of the inner housing and is guided through the side wall of the cabinet and is connected within the inner housing via a downwardly extending shaft to the inlet side of the packing zone.
Aufgrund der besonderen Gestaltung des Laborgaswäschers ist es auch möglich, ihm zwei Laborabzüge zuzuordnen. Dafür ist der Laborgaswäscher dann mit einem zweiten Eintrittsstutzen im oberen Ende des Innengehäuses versehen, der durch die dem ersten Eintrittsstutzen gegenüberliegende Seitenwand des Innengehäuses und durch die ihr benachbarte Seitenwand des Schrankes nach außen geführt ist.Due to the special design of the laboratory gas scrubber, it is also possible to assign two fume cupboards to it. For this purpose, the laboratory gas scrubber is then provided with a second inlet connector in the upper end of the inner housing, which is led to the outside through the side wall of the inner housing opposite the first inlet connector and through the side wall of the cabinet adjacent to it.
Der erfindungsgemäße Laborgaswäscher kann aber ohne weiteres auch drei Laborabzügen zugeordnet werden und diese versorgen, wie sich in der Praxis gezeigt hat.However, the laboratory gas scrubber according to the invention can also be easily assigned to three fume cupboards and supply them, as has been shown in practice.
Zu diesem Zweck ist der Laborgaswäscher mit einem dritten Eintrittsstutzen im oberen Ende des Innengehäuses versehen, der durch die Dachwand des Innengehäuses und die dieser benachbarte Dachwand des Schrankes nach oben und außen geführt ist. Von diesem Eintrittsstutzen führt dann eine entsprechend ausgebildete Rohrleitung zur Austrittsöffnung am oberen Ende des dritten Laborabzuges.For this purpose, the laboratory gas scrubber is provided with a third inlet connection in the upper end of the inner housing, which passes through and through the roof wall of the inner housing neighboring roof wall of the cabinet is guided upwards and outwards. A correspondingly designed pipeline then leads from this inlet connection to the outlet opening at the upper end of the third fume cupboard.
Vorzugsweise ist in der Vorderwand des Innengehäuses ein Sichtfenster und in der Vorderwand des Schrankes ein den Einblick in dieses Sichtfenster gestattendes äußeres Sichtfenster vorgesehen.A viewing window is preferably provided in the front wall of the inner housing and an outer viewing window is provided in the front wall of the cabinet to allow viewing of this viewing window.
Die Erfindung wird nachstehend anhand der Zeichnung in Ausführungsbeispielen näher erläutert. Dabei zeigen:
- Fig. 1
- einen Schnitt durch einen erfindungsgemäßen Laborgaswäscher;
- Fig. 2
- einen Schnitt längs der Linie II-II in Fig. 1;
- Fig. 3
- einen Schnitt längs der Linie III-III in Fig. 1;
- Fig. 4
- einen Schnitt längs der Linie IV-IV in Fig. 1, durch den Laborgaswäscher und zwei beiderseits desselben angeordnete Laborabzüge;
- Fig. 5
- eine Vorderansicht in Richtung des Pfeiles V in Fig. 4 und
- Fig. 6
- eine teilweise abgebrochene Vorderansicht ähnlich Fig. 5, jedoch mit einem Laborgaswäscher und drei daran angeschlossenen Laborabzügen.
- Fig. 1
- a section through a laboratory gas scrubber according to the invention;
- Fig. 2
- a section along the line II-II in Fig. 1;
- Fig. 3
- a section along the line III-III in Fig. 1;
- Fig. 4
- a section along the line IV-IV in Figure 1, through the laboratory gas scrubber and two laboratory fume cupboards arranged on both sides thereof;
- Fig. 5
- a front view in the direction of arrow V in Fig. 4 and
- Fig. 6
- a partially broken front view similar to FIG. 5, but with a laboratory gas washer and three fume cupboards connected to it.
Der in Fig. 1 bis 3 dargestellte Laborgaswäscher umfaßt einen Schrank 1, der in seinem Unterteil einen Waschflüssigkeitstank 3, eine in diesen eintauchende Tauchpumpe 5 und einen Schaltschrank 4 mit den elektrischen Steuer- und Regelgeräten für den Betrieb des Laborgaswäschers enthält. Im Oberteil dieses Schrankes befindet sich ein Innengehäuse 2 mit an dessen oberem Ende angeordneten Eintrittsstutzen 10, 10' und 10'', die zum Anschluß von einem oder zwei oder drei dicht daneben stehenden Laborabzügen dienen. Falls nicht alle drei Eintrittsstutzen benötigt werden, sind die anderen mit Kappen abgedeckt. Eine solche Verschlußkappe 14 ist in Fig. 2 auf dem dort nicht benötigten Eintrittsstutzen 10'' dargestellt.The laboratory gas scrubber shown in FIGS. 1 to 3 comprises a
Die vorgenannten Eintrittsstutzen sind jeweils durch die Wand des Schrankes 1 geführt.The aforementioned inlet connections are each guided through the wall of the
Am oberen Ende des Innengehäuses befindet sich in seiner Dachwandung ein Austrittsstutzen 9 für die gereinigte Abluft, der durch eine entsprechende Rohrleitung über einen Ventilator mit dem Schornstein für die Abluft verbunden wird. Dieser Austrittsstutzen ist ebenfalls durch die Dachwandung des Schrankes 1 geführt.At the upper end of the inner housing there is an
Im Innengehäuse 2 befindet sich ferner, wie in Fig. 2 angedeutet, eine senkrecht verlaufende Trennwand 12. Die vorerwähnten Eintrittsstutzen 10, 10' und 10'' am oberen Ende des Innengehäuses 2 befinden sich auf der einen Seite dieser Trennwand 12, so daß die durch die Eintrittsstutzen eintretende, zu reinigende Abluft längs dieser Trennwand 12 zum unteren Ende des Innengehäuses 2 geführt wird und dort, wie aus Fig. 2 zu erkennen ist, unterseitig in die Füllkörperzone 6 eintritt. Von dort gelangt die Abluft zunächst in die Bedüsungszone 7, die über eine Querleitung 18 mit Waschflüssigkeit versorgt wird, und dann in die Agglomerationszone 8 und von dort in den Austrittsstutzen 9.In the
Ein Sichtfenster 11 in der Wandung des Innengehäuses, in der Höhe zwischen der Füllkörperzone und der Bedüsungszone, sowie ein mit diesem Sichtfenster fluchtendes Sichtfenster 11' im Schrank 1 gestatten eine Beobachtung des Inneren des Innengehäuses im Betrieb.A
Die für die Bedüsungszone erforderliche Waschflüssigkeit 13 ist in dem bereits erwähnten Waschflüssigkeitstank 3 am Boden des Schrankes 1 enthalten. In dieser Flüssigkeit taucht der Saugstutzen einer oberhalb des Waschflüssigkeitstanks angeordneten Tauchpumpe 5 ein. Die Tauchpumpe saugt Waschflüssigkeit über ein Ventil 15 in eine Steigleitung 17, die die erwähnte Querleitung 18 versorgt. Der Druck kann durch ein an die Leitung angeschlossenes Manometer 16 kontrolliert werden.The
Sofern in dem Laborabzug Perchlorsäure in die Abluft gelangt, werden die Eintrittsstutzen 10, 10', 10'' durch eine zusätzliche Düse 20 besprüht, um zu verhindern, daß sich innerhalb der Absaugekanäle konzentrierte Perchlorsäure oder deren Salze ansammeln können. Diese Düsen 20, von denen eine in den Figuren 1 und 2 dargestellt ist, werden durch eine an die Steigleitung 17 angeschlossene Zusatzleitung 19 versorgt.If perchloric acid gets into the exhaust air in the fume cupboard, the
Die aus der Bedüsungszone bzw. den Düsen 20 ablaufende Waschflüssigkeit gelangt durch eine vom Boden des Innengehäuses 2 ausgehende Rücklaufleitung 21 wieder in den Waschflüssigkeitstank 3.The washing liquid flowing out of the spraying zone or the
Im übrigen sind ein Frischwasserzulauf, ein Überlauf und Einrichtungen zur Konstanthaltung eines gewünschten pH-Wertes, sämtlich nicht dargestellt, vorgesehen.In addition, a fresh water inlet, an overflow and devices for keeping a desired pH constant, all not shown, are provided.
Der Schaltschrank 4 kann zu Wartungszwecken aus dem Schrank herausgezogen werden.The control cabinet 4 can be pulled out of the cabinet for maintenance purposes.
Wie aus Fig. 4 zu ersehen ist, befinden sich beiderseits des Laborgaswäschers 1 zwei Laborabzüge 29 und 30 mit den üblichen vorderen Schiebefenstern 31 und 32 und im hinteren Teil am oberen Ende entsprechende Öffnungen, in die die Eintrittsstutzen 10 bzw. 10' des Laborgaswäschers eintreten.As can be seen from Fig. 4, are on both sides of the laboratory gas washer 1 two
Fig. 5 zeigt eine Vorderansicht dieser Baugruppe.Fig. 5 shows a front view of this assembly.
In Fig. 6 ist ein Laborgaswäscher-Schrank 1 mit zwei beiderseits angeordneten Laborabzügen 29 und 30 und einem dritten Laborabzug 33 dargestellt. Dieser dritte Laborabzug wird durch einen oberen Verbindungsstutzen 37 und ein Verbindungsrohr 38 mit dem oberen Eintrittsstutzen 10'' des Laborgaswäschers verbunden.6 shows a laboratory
Im oberen Teil der drei Laborabzüge befinden sich horizontale Zwischenwände 34, 35 und 36 mit Öffnungen für die Abluft. Diese Öffnungen sind durch Verbindungsstutzen 37, 39 und 40 in der genannten Weise mit dem Laborgaswäscher verbunden.
Claims (5)
- A laboratory gas scrubber for removing soluble contaminant gases, which comprises a housing with a packing zone (6), a spraying zone (7) arranged above and an agglomeration zone (8) arranged above the spraying zone (7), whereby the housing contains an inlet connector (10) for the exit air which is emerging from a laboratory extractor hood and is to be purified, and an outlet connector (9) for the purified exit air, characterised in that the housing is an inner housing (2) of a cabinet, that the inner housing (2) is arranged in the upper part of the cabinet (1), that the inlet connector (10) and the outlet connector (9) pass through the walls of the cabinet (1) to the outside and that the cabinet (1) contains in its lower part a scrubbing liquid tank (3), an immersion pump (5) immersed in the latter and a switchbox (4) with the electrical control devices for operating the laboratory gas scrubber, so that the cabinet (1) can be assigned as a closed subassembly to one or more laboratory extractor hoods.
- A laboratory gas scrubber according to Claim 1, characterised in that the inlet connector (10) is arranged on the side at the top end of the inner housing (2) and passes through the side wall of the cabinet (1) and is connected inside the inner housing via a duct, which runs downwards, to the inlet side of the packing zone (6).
- A laboratory gas scrubber according to Claim 2, characterised by a second inlet connector (10') at the top end of the inner housing (2), which passes through the side wall, which is opposite the first inlet connector (10), of the inner housing (2) and through the side wall, adjacent thereto, of the cabinet (1) to the outside.
- A laboratory gas scrubber according to Claim 3, characterised by a third inlet connector (10'') at the top end of the inner housing (2), which passes through the roof of the inner housing and the roof, adjacent thereto, of the cabinet (1) upwards and to the outside.
- A laboratory gas scrubber according to Claims 1 to 4, characterised by a viewing window (11) in the front wall of the inner housing (2) and an outer viewing window (11') permitting observation through the latter viewing window in the front wall of the cabinet (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9101439U | 1991-02-08 | ||
| DE9101439U DE9101439U1 (en) | 1991-02-08 | 1991-02-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0498072A1 EP0498072A1 (en) | 1992-08-12 |
| EP0498072B1 true EP0498072B1 (en) | 1995-03-01 |
Family
ID=6864092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91121667A Expired - Lifetime EP0498072B1 (en) | 1991-02-08 | 1991-12-18 | Laboratory gas scrubber |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5209766A (en) |
| EP (1) | EP0498072B1 (en) |
| AT (1) | ATE119083T1 (en) |
| DE (2) | DE9101439U1 (en) |
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| DE4411078A1 (en) * | 1994-03-30 | 1995-10-05 | Gutehoffnungshuette Man | Filters for separating pollutants from flue gases |
| DE9409016U1 (en) | 1994-06-03 | 1994-08-04 | Gewerk Keramchemie | Laboratory gas scrubber |
| DE29606880U1 (en) * | 1996-04-16 | 1996-07-11 | Kt Kunststofftech Gmbh | Washer fluid circuit |
| CA2306265C (en) | 1997-10-08 | 2008-12-02 | Gordon S. Trivett | Gas scrubber |
| US6450682B1 (en) | 2000-01-07 | 2002-09-17 | C&M Inc. | Method and apparatus for predicting the end of life of a gas scrubber |
| US6540842B1 (en) * | 2000-01-07 | 2003-04-01 | C&M Inc. | Method for in-situ cleaning of a gas scrubber |
| US6514288B2 (en) * | 2001-02-23 | 2003-02-04 | Zimmer, Inc. | Prosthetic stem with strengthening rib |
| JP3729354B2 (en) * | 2002-04-04 | 2005-12-21 | 株式会社 ワイ・エム・エス | Dust collector |
| DE102008041521A1 (en) * | 2008-08-25 | 2010-03-04 | Robert Bosch Gmbh | Device with closed working space with improved cleaning ability |
| DE102009027513A1 (en) * | 2009-07-08 | 2011-01-13 | Robert Bosch Gmbh | Device for the safe testing of batteries |
| CN203108368U (en) * | 2012-12-25 | 2013-08-07 | 鸿准精密模具（昆山）有限公司 | Waste gas treatment device |
| CN104858198B (en) * | 2015-04-15 | 2017-12-01 | 广州泛美实验室系统科技股份有限公司 | A kind of energy-saving safe perchloric acid vent cabinet |
| CN115318053B (en) * | 2022-08-03 | 2023-10-24 | 浙江科恩实验设备有限公司 | Atomic gas extraction cover device and gas extraction method thereof |
| CN115228262B (en) * | 2022-08-22 | 2023-12-01 | 湖南国测生物科技有限公司 | Three-dimensional purification method for acid pollution in laboratory enclosed space |
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| DE3805445A1 (en) * | 1988-02-22 | 1989-08-24 | Friedrichsfeld Gmbh | DEVICE FOR PURIFYING GAS BY LIQUID |
| DE8816043U1 (en) * | 1988-12-24 | 1989-04-13 | Kt Kunststofftechnik Gmbh, 5210 Troisdorf, De | |
| JPH07102300B2 (en) * | 1989-02-07 | 1995-11-08 | 宇部興産株式会社 | Gas absorption tower |
| US5011520A (en) * | 1989-12-15 | 1991-04-30 | Vector Technical Group, Inc. | Hydrodynamic fume scrubber |
-
1991
- 1991-02-08 DE DE9101439U patent/DE9101439U1/de not_active Expired - Lifetime
- 1991-12-18 EP EP91121667A patent/EP0498072B1/en not_active Expired - Lifetime
- 1991-12-18 DE DE59104807T patent/DE59104807D1/en not_active Expired - Fee Related
- 1991-12-18 AT AT91121667T patent/ATE119083T1/en active
- 1991-12-30 US US07/814,158 patent/US5209766A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US5209766A (en) | 1993-05-11 |
| ATE119083T1 (en) | 1995-03-15 |
| DE9101439U1 (en) | 1991-05-08 |
| DE59104807D1 (en) | 1995-04-06 |
| EP0498072A1 (en) | 1992-08-12 |
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