EP0887088A1 - Procédé et installation de traitement de masses absorbantes contenant de l'amiante dans les bouteilles de gaz - Google Patents
Procédé et installation de traitement de masses absorbantes contenant de l'amiante dans les bouteilles de gaz Download PDFInfo
- Publication number
- EP0887088A1 EP0887088A1 EP98202155A EP98202155A EP0887088A1 EP 0887088 A1 EP0887088 A1 EP 0887088A1 EP 98202155 A EP98202155 A EP 98202155A EP 98202155 A EP98202155 A EP 98202155A EP 0887088 A1 EP0887088 A1 EP 0887088A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bottle
- fluid
- treatment
- basic solution
- asbestos
- 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.)
- Granted
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/36—Detoxification by using acid or alkaline reagents
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/35—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by hydrolysis
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/41—Inorganic fibres, e.g. asbestos
Definitions
- the present invention relates to a method of destruction of asbestos fibers contained in absorbent masses present inside acetylene gas cylinders.
- the most common method is to cut the end bottles, to extract the absorbent mass in an area confined, to pack the said mass in regulatory bags and to store the bags in appropriate landfills.
- Metal is headed to the steel industry after extensive rinsing to remove particles adhering to metal. Rinsing water containing asbestos is discharged in the public circuit.
- the other method is to introduce the bottles into ovens with a temperature above 1500 ° C.
- the merger of metal and asbestos fibers is obtained there comes out a metal substrate and silica considered inert; this method is effective, but costly very high.
- the bottle is destroyed.
- asbestos-based waste either it is stored and is not destroyed, bringing pollution to the drainage system worn, or it is destroyed, but at great cost and without recovery.
- the object of the present invention is to avoid these drawbacks and in particular to remove the absorbent masses containing asbestos out of metal bottles, preferably through their holes original, that is to say without destroying said bottles, or preventing their reuse.
- the absorbent masses containing asbestos will only be in contact with the atmosphere.
- This process advantageously makes it possible to attack the absorbent masses inside the bottles and to fluidize them in situ. This allows their extraction without affecting the physical integrity of bottles and without endangering the environment by releasing dust containing asbestos.
- This fluid mud can then be conducted, in a sealed manner vis-à-vis the external environment, in a known apparatus of the type described in the patent application international WO-A-97/00099. In this apparatus, the fibers asbestos and mineral fibers still suspended in the sludge liquids and already first attacked in the bottles themselves are attacked again and completely destroyed by a solution basic concentrated.
- the installation placed on two trays, for example a maritime dimension of 20 feet, allows mobile treatment in situ on the gas storage area without special devices.
- All the products resulting from this treatment are devoid of all asbestos fibers and other mineral fibers, personnel not be equipped with respiratory protection. All stages of processing can be carried out in a particularly closed circuit efficient and secure. No fiber can escape into the atmosphere, all the materials that can be reused and / or valued.
- the fibers do not could not be released since the first operation destructive asbestos happens in the bottle itself, and that at when the material comes out of the bottle, the asbestos is in a silicate mud which does not allow fibers to be released in the atmosphere.
- the aggression on the fibers is such that they do not could no longer cause pathology if introduced improbable in a respiratory circuit.
- the method includes, prior to said introduction of basic solution, a degassing of the bottle by putting it in communication with a source of depression.
- the process comprises, after the treatment of the fluid mud, a separation of the latter into a recyclable liquid phase in the solution basic and in a solid phase which can be upgraded.
- the sentence liquid is thus recycled to the maximum, which significantly reduces any environmental pollution and lowers the cost of basic materials fresh necessary for the realization of the attack solution.
- the sentence solid, completely free of asbestos fibers or mineral fibers can for example be recycled in silico-limestone compositions, usable in construction, or in the form of an adjuvant to clay intended for the manufacture of ceramic products.
- the single figure schematically represents a installation for implementing the method according to the invention.
- a basic solution preparation tank 1 capable of being heated by a heating element 2 to a temperature of the order of 160 ° C.
- an agent for the generation of OH ions is used - in aqueous solution, such as an alkaline or alkaline-earth base, in particular NaOH.
- NaOH flakes are for example stored in the silo 3 and supplied intermittently and known per se at the preparation tank 1. This is also connected in 4 to a source of water.
- An outlet conduit 5 connects the bottom of the preparation tank 1 with a heating tank 6.
- the valve 7 When the valve 7 is closed, the basic solution prepared is recycled to the top of the tank by a bypass 8, using a static mixer 9.
- an element heating 10 In the heating tank 6 there is provided an element heating 10.
- the basic solution is heated there for example to a temperature of the order of 260 ° C. under a vapor pressure of approximately 5 bars.
- a series of gas cylinders 11 are maintained, head in bottom, in a template generally designated by the reference 12.
- This template includes housings 13, one per bottle, in which bottles are retained by a removable plate 14 with smaller diameter perforations than the body of bottles and allowing passage of the heads 18 of the bottles to outside.
- Each housing 13 can be furnished with a heat exchanger heat 15 to maintain the temperature inside the bottles at a sufficient level especially for degassing.
- Template 12 can be supported on a frame not represented by an axis 16, so as to be able oscillate on this axis.
- a motor 17 controls this oscillation movement in a known way.
- Each flexible pipe 19 is connected to a branching with multiple channels, each closable by a valve 20 to 23 respectively.
- the tank 6 is in communication with the bottles by a leads to attack solution 24 provided with a branch 25 towards each bottle and connected to valve 21 of the track branch multiple.
- This multi-way branch is also connected to a gas pipe 26 by the valve 22 and to a mud pipe 27 by the valve 23.
- the gas pipe 26 is connected to a vacuum pump 28, for example a water ring pump, via a trap cold 29.
- the outlet of pump 28 is connected to a recovery of water polluted with gas 30, which can then be evacuated by a pump 31 for treating wastewater, in particular filtering.
- the mud conduits 27 are each connected to a slurry pump 32 which via the conduit 48 conducts the mass sludge absorbent to a reactor 33, via a three-way valve tracks 38 and a flexible pipe 37.
- the reactor 33 is mounted on an oscillating platform 34 supported by an axis 35 around which it is capable of tilting.
- the tilting movement is generated in a known manner under the action of a system consisting of a hydraulic cylinder or pneumatic and connecting rods and generally designated by the reference 36.
- the reactor is surrounded at least partially by a heating chamber 39 and it is mounted on the platform 34 so as to ability to rotate around its longitudinal axis under the action of a motor training 40.
- the reactor is connected at 41 directly to a conduit feed coming for example from the preparation tank (at 42).
- the three-way valve 38 also gives access to a outlet conduit 43 which leads to a phase separation device liquid and solid.
- a phase separation device liquid and solid In the example illustrated, it is a filter press 44.
- the solid cakes are collected in a collection bin 45 and the filtrate is recycled through recycling conduit 46 to a buffer tank 49, in turn in communication with the preparation tank 1, by a connecting duct 47.
- the installation according to the invention operates in the manner next :
- the acetylene gas cylinders 11 are installed, open, in the housings 13 of the template 12 which is then closed by the plate 14.
- a flexible pipe 19 is connected to the original opening of each cylinder and valves 20 and 22 of the multi-way branching are open, while the valves 21 and 23 are closed.
- the pump 28 is started and a residue is thus vacuumed of gas still contained in the bottles in a cold trap 29.
- An aqueous acetone solution is recovered in tank 30 to be then led to further use or treatment by the pump 31.
- preparation tank 1 a basic solution concentrated attack is prepared. It is heated to a temperature from 160 to 240 ° C at a pressure of 2 to 10 bars and it has a NaOH molar concentration of 12.5.
- the preparation solution is fed so discontinuous to the heating tank 6 in which it is brought to a temperature above 180 ° C., advantageously of the order of 190 to 270 ° C, preferably 260 ° C.
- the solution attack is preferably maintained under a vapor pressure of 2.5 to 7 bars, advantageously of the order of 5 bars.
- Valves 20 and 23 are then opened and the sludge fluidized are removed from the bottles using the mud pumps 32. It it is possible to envisage a succession of openings and closings alternating valves to clean the interior of the bottles with pressurized etching solution.
- the sludge is then directed to reactor 33 which is supplied with basic solution of 35 molar concentration.
- This solution can be formed from the basic solutions used for the attack and rinsing the bottles. It can also partially come from directly from the preparation tank 1.
- the basic attack solution is under a pressure of 2 to 10 bars, advantageously 2.5 to 7 bars, and preferably 3 to 4 bars, and at a temperature above 180 ° C, advantageously of the order of 190 to 270 ° C, preferably 240 ° C.
- the sludge is stirred in the reactor which is brought into rotation for example at 24 rpm around its longitudinal axis.
- the contents of the reactor are then brought to the filter press 44 where the solid phase-liquid phase separation takes place.
- the liquids are directed to the buffer tank 46 for a reheating and introduction into the preparation tank 1.
- Solids from cakes removed from the filter press are directed to recovery treatments.
- Recovered materials can be considered as raw materials in the two valuation systems by increased interstitial bonds and marked improvement in technical criteria of the various materials of these families. It is therefore of a raw material which has all its utility and therefore not of a second choice valuation as is often the case.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Processing Of Solid Wastes (AREA)
- Treating Waste Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
- Le transport onéreux des bouteilles à traiter vers un centre de destruction est évité.
- Destruction totale et irréversible des fibres d'amiantes et minérales.
- Aucun rejet dans l'atmosphère.
- Aucun rejet dans les décharges.
- Aucun rejet toxique dans les eaux usées.
- Métaux de récupération entièrement propres pour la sidérurgie.
- Aucune altération de la bouteille destinée au réemploi.
- Méthode simple et économique.
- Emploi d'autres déchets dans le recyclage valorisant.
Claims (12)
- Procédé de traitement des bouteilles de gaz usagées, en particulier de gaz acétylène, dans lesquelles se trouvent des masses absorbantes contenant de l'amiante et/ou des fibres minérales, comprenantune introduction à l'intérieur de chaque bouteille d'une solution basique concentrée,une attaque, par la solution basique, des masses absorbantes contenant de l'amiante et/ou des fibres minérales, à l'intérieur de la bouteille, jusqu'à l'obtention d'une boue fluide,une évacuation de cette boue fluide hors de la bouteille,un traitement de la boue fluide évacuée pour en éliminer l'amiante et/ou les fibres minérales subsistantes, etun recyclage des bouteilles de gaz vers une réutilisation.
- Procédé suivant la revendication 1, caractérisé en ce qu'il comprend préalablement à ladite introduction de solution basique, un dégazage de la bouteille par mise en communication de celle-ci avec une source de dépression.
- Procédé suivant l'une ou l'autre des revendications 1 et 2, caractérisé en ce qu'il comprend l'attaque des masses absorbantes dans la bouteille par la solution basique sous une pression de vapeur de 2 à 10 bars, avantageusement de 2,5 à 7 bars, de préférence de 5 bars, et à une température supérieure à 180°C, avantageusement de l'ordre de 190 à 270°C, de préférence de 260°C.
- Procédé suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que le traitement de la boue fluide évacuée comprend une alimentation de celle-ci à un réacteur et une attaque de cette boue fluide par une solution basique concentrée à une pression de vapeur de 2 à 10 bars, avantageusement de 2,5 à 7 bars, de préférence de 3 à 4 bars, et à une température supérieure à 180°C, avantageusement de l'ordre de 190 à 270°C, de préférence de 240°C, et une agitation jusqu'à l'obtention d'une masse dépourvue d'amiante et de fibres minérales.
- Procédé suivant la revendication 4, caractérisé en ce qu'il comprend une admission d'un complément de solution basique dans le réacteur.
- Procédé suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que la solution basique du traitement de la boue fluide évacuée est une solution aqueuse de NaOH 30 à 40 molaires, de préférence 35 molaires.
- Procédé suivant l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comprend une attaque par la solution basique de plusieurs bouteilles simultanément et un traitement dans un même réacteur des boues fluides issues de ces bouteilles.
- Procédé suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que l'introduction susdite s'effectue par une ouverture d'origine de la bouteille, ainsi qu'un éventuel dégazage préalable de cette bouteille.
- Procédé suivant l'une quelconque des revendications 1 à 8, caractérisé en ce que la boue fluide obtenue à la suite de l'attaque dans la bouteille est exempte de masses absorbantes solides.
- Procédé suivant l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comprend, après le traitement de la boue fluide, une séparation de celle-ci en une phase liquide recyclable dans la solution basique et en une phase solide éventuellement valorisable.
- Procédé suivant la revendication 10, caractérisé en ce que la phase solide est valorisée dans des compositions silico-calcaires ou sous la forme d'un adjuvant à de l'argile destinée à des produits céramiques.
- Procédé suivant l'une quelconque des revendications 1 à 11, caractérisé en ce qu'il comprend, après l'évacuation de la boue fluide hors de la bouteille, une introduction supplémentaire de solution basique concentrée à l'intérieur de chaque bouteille, un lavage final de la bouteille, et un traitement de la solution de lavage analogue à celui subi par la boue fluide précitée.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9700553 | 1997-06-27 | ||
BE9700553A BE1011243A6 (fr) | 1997-06-27 | 1997-06-27 | Procede et installation de traitement des masses absorbantes contenant de l'amiante dans les bouteilles d'acetylene. |
BE9800270 | 1998-04-08 | ||
BE9800270A BE1011867A6 (fr) | 1998-04-08 | 1998-04-08 | Procede et installation de traitement de masses absorbantes contenant de l'amiante dans les bouteilles de gaz. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0887088A1 true EP0887088A1 (fr) | 1998-12-30 |
EP0887088B1 EP0887088B1 (fr) | 2003-10-01 |
Family
ID=25663107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98202155A Expired - Lifetime EP0887088B1 (fr) | 1997-06-27 | 1998-06-25 | Procédé et installation de traitement de masses absorbantes contenant de l'amiante dans les bouteilles de gaz |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0887088B1 (fr) |
AT (1) | ATE250961T1 (fr) |
DE (1) | DE69818552D1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2950277A1 (fr) * | 2009-09-23 | 2011-03-25 | Air Liquide | Procede pour eliminer un revetement present sur la surface d'un recipient de gaz |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1191237A (fr) * | 1957-02-13 | 1959-10-19 | Procédé et dispositif permettant d'enlever le contenu solide des bouteilles d'acétylène | |
EP0559051A1 (fr) * | 1992-03-03 | 1993-09-08 | Solvay Umweltchemie GmbH | Recyclage des bouteilles à gaz d'acétylène contenant de l'amiante |
WO1994008661A1 (fr) * | 1992-10-08 | 1994-04-28 | Cross-Link Technology | Produit et procede de traitement de l'asbeste |
WO1997000099A1 (fr) * | 1995-06-16 | 1997-01-03 | Debailleul Gerard | Procede et installation de traitement de dechets contenant de l'amiante |
-
1998
- 1998-06-25 EP EP98202155A patent/EP0887088B1/fr not_active Expired - Lifetime
- 1998-06-25 DE DE69818552T patent/DE69818552D1/de not_active Expired - Lifetime
- 1998-06-25 AT AT98202155T patent/ATE250961T1/de not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1191237A (fr) * | 1957-02-13 | 1959-10-19 | Procédé et dispositif permettant d'enlever le contenu solide des bouteilles d'acétylène | |
EP0559051A1 (fr) * | 1992-03-03 | 1993-09-08 | Solvay Umweltchemie GmbH | Recyclage des bouteilles à gaz d'acétylène contenant de l'amiante |
WO1994008661A1 (fr) * | 1992-10-08 | 1994-04-28 | Cross-Link Technology | Produit et procede de traitement de l'asbeste |
WO1997000099A1 (fr) * | 1995-06-16 | 1997-01-03 | Debailleul Gerard | Procede et installation de traitement de dechets contenant de l'amiante |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2950277A1 (fr) * | 2009-09-23 | 2011-03-25 | Air Liquide | Procede pour eliminer un revetement present sur la surface d'un recipient de gaz |
WO2011036373A3 (fr) * | 2009-09-23 | 2011-05-19 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procédé pour éliminer un revêtement composite présent sur la surface d'une bouteille de gaz |
CN102510790A (zh) * | 2009-09-23 | 2012-06-20 | 乔治洛德方法研究和开发液化空气有限公司 | 除去存在于气体瓶表面上的复合材料涂层的方法 |
US8409364B2 (en) | 2009-09-23 | 2013-04-02 | L'Air Liquide Societe Anonyme pour l'Etude el l'Exploitation des Procedes Georges Claude | Process for removing a composite coating present on the surface of a gas cartridge |
CN102510790B (zh) * | 2009-09-23 | 2015-05-27 | 乔治洛德方法研究和开发液化空气有限公司 | 除去存在于气体瓶表面上的复合材料涂层的方法 |
Also Published As
Publication number | Publication date |
---|---|
EP0887088B1 (fr) | 2003-10-01 |
DE69818552D1 (de) | 2003-11-06 |
ATE250961T1 (de) | 2003-10-15 |
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