WO1994005401A1 - Method for fabricating a gas adsorption means, adsorption means and sanitazing plant - Google Patents

Method for fabricating a gas adsorption means, adsorption means and sanitazing plant Download PDF

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Publication number
WO1994005401A1
WO1994005401A1 PCT/FR1993/000826 FR9300826W WO9405401A1 WO 1994005401 A1 WO1994005401 A1 WO 1994005401A1 FR 9300826 W FR9300826 W FR 9300826W WO 9405401 A1 WO9405401 A1 WO 9405401A1
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WO
WIPO (PCT)
Prior art keywords
liquid
gases
chimney
cartridge
adsorption
Prior art date
Application number
PCT/FR1993/000826
Other languages
French (fr)
Inventor
Philippe Schlicklin
Original Assignee
Pont-A-Mousson S.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from FR9210734A external-priority patent/FR2695382B1/en
Priority claimed from FR9302294A external-priority patent/FR2701864B1/en
Application filed by Pont-A-Mousson S.A. filed Critical Pont-A-Mousson S.A.
Priority to AU49646/93A priority Critical patent/AU4964693A/en
Priority to BR9307006A priority patent/BR9307006A/en
Publication of WO1994005401A1 publication Critical patent/WO1994005401A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/2805—Sorbents inside a permeable or porous casing, e.g. inside a container, bag or membrane
    • 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
    • B01D53/0415—Beds in cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28016—Particle form
    • B01J20/28019—Spherical, ellipsoidal or cylindrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/112—Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/34—Specific shapes
    • 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
    • B01D2257/304—Hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air

Definitions

  • the present invention relates to the adsorption of gases. More particularly it relates to a gas adsorption device and a method which can be used for the manufacture of such a gas adsorption device.
  • the active substance for adsorption which can be a mixture of components must have a sufficient porosity to satisfy the range of admissible pressure drops on the gas mixture and a specific surface area ( m per m or per kg) large to provide an active surface. adsorption making it possible to remove the largest possible fraction of the pollutant (s) on the path imposed on the gas to be purified.
  • Document US 4,586,941 discloses an adsorption device comprising a cartridge consisting of at least one substantially sealed side wall, resting on a porous bottom containing a purifying bed composed of activated carbon.
  • This known device poses a technical problem linked to the weight which requires the use of lifting devices for replacing the cartridge. This technical problem is developed below.
  • the active substance is only useful over a small thickness, the adsorption phenomena being essentially a surface reaction. It therefore suffices to have the active substance on the surface of a granular support which provides the required porosity.
  • the disadvantage is that the mass of active substance is generally reduced relative to the total mass of the adsorbent, that is to say of the support and of the active substance.
  • the device according to the invention is a light adsorption means with a long operating time because its purifying bed consists of adsorbent elements formed by substantially spherical supports made of expanded polymeric material coated with a layer. thin active material, said cartridge being closed by a bottom and a porous cover.
  • the cartridge fills a basket comprising at least one handling handle.
  • the adsorbent element comprises an agglutinating substance and a surfactant.
  • the process for manufacturing the adsorbent device is characterized by the following successive steps: - Introduction of at least one expanded polymeric material, an active material in powder form, water or an appropriate solvent and an agglutinating substance in a sealed container and confined; - shaking said container; removing the container from the assembly formed by the expanded polymeric material, the active material, the water or the solvent and the agglutinating substance; - air drying of the adsorbent mass.
  • FIG. 1 is a vertical section of the adsorption mass according to the invention, shown in place in the conduit responsible for channeling the gases to be purified;
  • Fig. 2 is a partially cutaway perspective view of the adsorption mass according to the invention;
  • Fig. 3 is a partially cutaway view of a particle constituting the adsorption mass according to the invention,
  • FIG. 4 is an example of application of the adsorption mass according to the invention in the case of the reception of a discharge network arriving at a treatment plant.
  • the gas adsorption device 2 shown in FIG. 1, consists of a cylindrical basket 10 composed of a large mesh lattice with a bottom and a removable protective cover 11.
  • the basket 10 comprises a cartridge 20 containing a mass or a purifying bed 30. It is intended to protect shocks the cartridge 20.
  • the basket 10 has at its upper part handling handles 12 typically two in number but which may include a different number. It is housed in the conduit 3 of the purifying gaze interposed on the path of the gases 2 to be purified shown by the arrows, and resting on an annular seat 4, provided for this purpose in the cylindrical conduit 3, provided with a sealing element 40 of known type, for example an element with rectangular section, two opposite faces adhering to the walls and the other two opposite faces perpendicular to the wall devoid of adhesion means remain free to deform and move relative to the wall. (See French document FR-A-2 670 519 in the name of the Applicant). This element prevents the gases to be purified from circulating between the walls of the duct 3 and the outer surface of the cylindrical basket 10.
  • the basket 10 contains the cartridge 20 of cylindrical shape also composed of a skeleton cover 21, a bottom 22 also of skeleton and a side wall 23 substantially gas tight which channels the gas flow to be purified entering through the bottom 22 and leaving through the cover 21 which thus crosses the entire height of the purifying mass 30 made up of particles described below.
  • the basket 10 is in particular made of metal such as corrosion-resistant stainless steel or possibly of a polymeric material.
  • the flatness of the bottom 22 makes it possible to ensure a relative seal with the seal 40.
  • the adsorption device 1 contained in the basket 10 and shown in FIG. 2 consists of the cartridge 20 fitted in the basket 10 closed by means of the cover 21.
  • the cartridge 20 is completely filled with the purifying mass 30.
  • the side wall 23 is shown in openwork as well as the cover 21 and the bottom 22. It is preferable to reduce or prevent the passage of gases through of the wall 23 either by adapting a very fine mesh, or by replacing the lattice wall 23 with a solid wall.
  • the walls of the cartridge 20 are typically made of plastic as well as the cover 21 and bottom 22, the side wall 23 can be considered in thin stainless steel strip.
  • the purifying mass 30 contained in the cartridge 20, is made up of particles 31.
  • Each particle as shown in FIG. 3 is coated with a thin layer of active substance 32 disposed on the surface of a substantially spherical support composed of an expanded foam of a polymeric material 33.
  • the material supports expanded polymer 33 are beads of expanded polystyrene or cellular polyvinyl chloride.
  • the active substance 32 used in pulverulent form is applied to the surface of the expanded foam particle using an agglutinating substance used in liquid form with optionally an addition of surfactant to facilitate wetting.
  • the active substance consists, for example, of iron oxides.
  • the particles 31 covered with the active substance, once dried, are placed in the cartridge 20 and constitute the purifying mass 30.
  • the support for the purifying mass 30 is made of polystyrene foam but, as a variant, it is made of other non-biodegradable plastics with a specific mass of 15 to 50 kg / m 3 , such as polyvinyl chloride, polyethylene, polypropylene etc.
  • a detailed embodiment of a purifying mass 30 is given below. It relates to the capture of hydrogen sulfide H 2 S produced in a sewerage network.
  • the active substance for the adsorption of hydrogen sulfide consists of hydrated or non-hydrated iron oxides which fix the hydrogen sulfide according to a process comprising an intermediate step of forming an unstable iron sulfide in the presence of oxygen which regenerates in a second step the iron oxides and leaves the sulfur in elementary form.
  • the adsorption mass With a support made of expanded clay beads of the same diameter (3 mm), the adsorption mass will be 69.2 kg, including 8.8 kg of iron oxides.
  • the weight of the adsorption mass must be added to the weight of the support.
  • Fig. 4 shows a polluted water treatment installation consisting of a network comprising at least one station 6 for lifting waste or polluted water 5 supplying a discharge pipe 7 where unwanted gases 2 such as hydrogen sulfide, a desorber sight composed of two parts: a first chimney 3 'provided with a gas-tight cover 34 2 receiving the flow of polluted liquid 5 coming from the discharge circuit 7 in its upper part 35, of the setting device speed and pressure 3 ′ of liquid 5 and of drive (circulation) of gases 2 consisting of a converging followed by a neck 36, 37 and a diverging 38 ensuring the desorption by expansion and shock of the gases 2 contained in the liquid 5 and the circulation thereof by the effect of a water pump, a second chimney 3 arranged parallel to the first and at a short distance, also provided with a gas-tight cover 39, connected to the first chimney 3 ' by a low communication 40 for the liquid 5 and the gases 2, the liquid freed from the undesirable gases being discharged in the gravity section 8 originating in the
  • the two chimneys of the manhole being arranged vertically, the flow of polluted liquid coming from the discharge circuit 7 is poured down into the first manhole, this orientation being obtained by means of an elbow 43 having one end fixed to the discharge circuit and the other end facing down being located inside the chimney 3 ', and substantially in the axis of the device for speed setting and pressure of the liquid.
  • the water 5 is circulated from the polluted water lifting station 6 by means of the delivery pipes 7 or gravity flow 8 according to the geometry of the terrain.
  • a pump 7a located at the base of the discharge lines 7 makes it possible to drive water 2.
  • the purifying manhole located between the discharge pipe 7 and the gravity pipe 8 ensures the continuity of the water circulation 5 between these two pipes and has the function of ensuring by shock the desorption of the undesirable gases 2 formed in the discharge section. and especially hydrogen sulfide H2S.
  • the adsorption mass 1 placed in the chimney 3 is as defined above.

Abstract

The invention relates to an adsorption device (1) comprising a cartridge (20) having at least one substantially tight sidewall (23) resting on a porous bottom (22) containing an adsorbing bed, and a gas adsorption means (2). The fabrication of the adsorption means (1) is carried out through the following steps: introduction of at least one expanded polymer material (33), a pulverulant active material (32), water and an agglutinating substance in a confined and fluid-tight container; agitation of said container; removal from the container of the contents formed by the expanded polymer material (33), the active material (32), the water and the agglutinating substance. It may be appropriate for a plant for purification of polluted water by adsorption of undesirable desorbed gas.

Description

Procédé de fabrication d'un moyen d'adsorption de gaz, moyen (Tadsorption et installation d assainissement correspondants. Method for manufacturing a medium for gas adsorption (Tadsorption and corresponding sanitation installation.
La présente invention est relative à l'adsorption de gaz. Plus particulièrement elle a pour objet un dispositif d'adsorption de gaz et un procédé pouvant servir à la fabrication d'un tel dispositif d'adsorption de gaz.The present invention relates to the adsorption of gases. More particularly it relates to a gas adsorption device and a method which can be used for the manufacture of such a gas adsorption device.
Pour retirer un ou plusieurs composants indésirables d'un mélange gazeux, il est connu de faire passer ce mélange gazeux sur une masse poreuse composée de partie de substances spécifiquement adsorbante de l'un ou de plusieurs des composants indésirables.To remove one or more undesirable components from a gaseous mixture, it is known to pass this gaseous mixture over a porous mass composed of part of substances specifically adsorbing one or more of the undesirable components.
La substance active pour 1'adsorption qui peut être un mélange de composants doit présenter une porosité suffisante pour satisfaire au domaine de pertes de charges admissibles sur le mélange gazeux et une surface spécifique (m par m ou par kg) importante pour offrir une surface active d'adsorption permettant de retirer une fraction la plus grande possible du ou des polluants sur le trajet imposé au gaz à épurer.The active substance for adsorption which can be a mixture of components must have a sufficient porosity to satisfy the range of admissible pressure drops on the gas mixture and a specific surface area ( m per m or per kg) large to provide an active surface. adsorption making it possible to remove the largest possible fraction of the pollutant (s) on the path imposed on the gas to be purified.
Par le document US 4 586 941 , on connaît un dispositif d'adsorption comprenant une cartouche constituée d'au moins une paroi latérale sensiblement étanche, reposant sur un fond poreux contenant un lit épurant composé de charbon actif.Document US 4,586,941 discloses an adsorption device comprising a cartridge consisting of at least one substantially sealed side wall, resting on a porous bottom containing a purifying bed composed of activated carbon.
Ce dispositif connu pose un problème technique lié au poids qui impose d'employer des appareils de levage pour le remplacement de la cartouche. Ce problème technique est développé ci-après.This known device poses a technical problem linked to the weight which requires the use of lifting devices for replacing the cartridge. This technical problem is developed below.
En principe la substance active n'est utile que sur une faible épaisseur, les phénomènes d'adsorption étant essentiellement une réaction de surface. II suffit donc de disposer la substance active à la surface d'un support granulaire qui assure la porosité requise. L'inconvénient est que la masse de substance active est en général réduite par rapport à la masse totale de l'adsorbant, c'est-à-dire du support et de la substance active.In principle, the active substance is only useful over a small thickness, the adsorption phenomena being essentially a surface reaction. It therefore suffices to have the active substance on the surface of a granular support which provides the required porosity. The disadvantage is that the mass of active substance is generally reduced relative to the total mass of the adsorbent, that is to say of the support and of the active substance.
Cet inconvénient peut être rédhibitoire dans les cas ou l'on désire disposer de masses d'adsorption facilement remplaçables, manipulables sans appareillage de levage par un ou deux hommes mais présentant néanmoins une durée de fonctionnement suffisante pour ne pas nécessiter de trop fréquents remplacements. De plus, il est nécessaire pour la fabrication d'un moyen d'adsorption de gaz que les éléments le constituant présentent une mouillabilité importante.This drawback can be prohibitive in cases where it is desired to have adsorption masses readily replaceable, manipulable without lifting equipment by one or two men but nevertheless having a sufficient operating time so as not to require too frequent replacements. In addition, it is necessary for the manufacture of a gas adsorption means that the constituent elements have a high wettability.
L' invention a pour but de remédier à ces inconvénients. A cet effet, le dispositif suivant l'invention est un moyen d'adsorption léger et d'une durée de fonctionnement importante car son lit épurant est constitué d'éléments adsorbants formés par des supports sensiblement sphériques en matériau polymérique expansé revêtu d'une couche mince de matière active, ladite cartouche étant fermée par un fond et un couvercle poreux.The object of the invention is to remedy these drawbacks. To this end, the device according to the invention is a light adsorption means with a long operating time because its purifying bed consists of adsorbent elements formed by substantially spherical supports made of expanded polymeric material coated with a layer. thin active material, said cartridge being closed by a bottom and a porous cover.
Afin que le dispositif d'adsorption soit aisément manipulable, la cartouche remplit un panier comportant au moins une poignée de manipulation. Suivant une autre caractéristique, l'élément adsorbant comprend une substance agglutinante et un agent tensioactif.So that the adsorption device is easy to handle, the cartridge fills a basket comprising at least one handling handle. According to another characteristic, the adsorbent element comprises an agglutinating substance and a surfactant.
Le procédé de fabrication du dispositif adsorbant, se caractérise par les étapes successives suivantes : - Introduction d'au moins un matériau polymérique expansé, une matière active sous forme pulvérulente, de l'eau ou un solvant approprié et une substance agglutinante dans un récipient étanche et confiné ; - agitation dudit récipient ; retrait du récipient de l'ensemble formé par le matériau polymérique expansé, la matière active, l'eau ou le solvant et la substance agglutinante ; - séchage à l'air de la masse adsorbante.The process for manufacturing the adsorbent device is characterized by the following successive steps: - Introduction of at least one expanded polymeric material, an active material in powder form, water or an appropriate solvent and an agglutinating substance in a sealed container and confined; - shaking said container; removing the container from the assembly formed by the expanded polymeric material, the active material, the water or the solvent and the agglutinating substance; - air drying of the adsorbent mass.
L'invention sera aisément comprise à l'aide de la description suivante et des dessins annexés sur lesquels : la Fig. 1 est une coupe verticale de la masse d'adsorption selon l'invention, montrée en place dans le conduit chargé de canaliser les gaz à épurer ; - la Fig. 2 est une vue en perspective partiellement arrachée de la masse d'adsorption selon 1' invention ; la Fig. 3 est une vue partiellement arrachée d'une particule constituant la masse d'adsorption selon l'invention, la Fig. 4 est un exemple d'application de la masse d'adsorption selon l'invention au cas de la réception d'un réseau en refoulement arrivant à une station d'épuration. Le dispositif 1 d'adsorption de gaz 2 représenté à la Fig. 1, se compose d'un panier cylindrique 10 composé d'un treillis à larges mailles avec un fond et un couvercle de protection amovible 11. Le panier 10 comprend une cartouche 20 contenant une masse ou un lit épurant 30. Il est destiné à protéger des chocs la cartouche 20.The invention will be easily understood with the aid of the following description and the appended drawings in which: Fig. 1 is a vertical section of the adsorption mass according to the invention, shown in place in the conduit responsible for channeling the gases to be purified; - Fig. 2 is a partially cutaway perspective view of the adsorption mass according to the invention; Fig. 3 is a partially cutaway view of a particle constituting the adsorption mass according to the invention, FIG. 4 is an example of application of the adsorption mass according to the invention in the case of the reception of a discharge network arriving at a treatment plant. The gas adsorption device 2 shown in FIG. 1, consists of a cylindrical basket 10 composed of a large mesh lattice with a bottom and a removable protective cover 11. The basket 10 comprises a cartridge 20 containing a mass or a purifying bed 30. It is intended to protect shocks the cartridge 20.
Le panier 10 comporte à sa partie supérieure des poignées de manipulation 12 typiquement au nombre de deux mais pouvant en comporter un nombre différent. Il est logé dans le conduit 3 du regard épurateur interposé sur le trajet des gaz 2 à épurer figuré par les flèches, et reposant sur une assise annulaire 4, prévue à cet effet dans le conduit cylindrique 3, munie d'un élément d'étanchéité 40 de type connu, par exemple un élément à section rectangulaire dont deux faces opposées adhérent aux parois et les deux autres faces opposées perpendiculaires à la paroi dépourvues de moyen d'adhérence restent libres de se déformer et de se déplacer par rapport à la paroi. (Voir document français FR-A-2 670 519 au nom de la Demanderesse). Cet élément empêche les gaz à épurer de circuler entre les parois du conduit 3 et la surface extérieure du panier cylindrique 10. La panier 10 contient la cartouche 20 de forme cylindrique également composée d'un couvercle à claire- voie 21, d'un fond 22 lui aussi à claire-voie et d'une paroi latérale 23 sensiblement étanche aux gaz ce qui canalise le flux gazeux à épurer entrant par le fond 22 et sortant par le couvercle 21 qui traverse ainsi toute la hauteur de la masse épurante 30 constituée de particules décrites plus loin.The basket 10 has at its upper part handling handles 12 typically two in number but which may include a different number. It is housed in the conduit 3 of the purifying gaze interposed on the path of the gases 2 to be purified shown by the arrows, and resting on an annular seat 4, provided for this purpose in the cylindrical conduit 3, provided with a sealing element 40 of known type, for example an element with rectangular section, two opposite faces adhering to the walls and the other two opposite faces perpendicular to the wall devoid of adhesion means remain free to deform and move relative to the wall. (See French document FR-A-2 670 519 in the name of the Applicant). This element prevents the gases to be purified from circulating between the walls of the duct 3 and the outer surface of the cylindrical basket 10. The basket 10 contains the cartridge 20 of cylindrical shape also composed of a skeleton cover 21, a bottom 22 also of skeleton and a side wall 23 substantially gas tight which channels the gas flow to be purified entering through the bottom 22 and leaving through the cover 21 which thus crosses the entire height of the purifying mass 30 made up of particles described below.
Le panier 10 est en particulier en métal tel que de l'acier inoxydable résistant à la corrosion ou éventuellement en un matériau polymérique.The basket 10 is in particular made of metal such as corrosion-resistant stainless steel or possibly of a polymeric material.
La planéité du fond 22 permet d'assurer une étanchéité relative avec le joint 40.The flatness of the bottom 22 makes it possible to ensure a relative seal with the seal 40.
Le dispositif 1 d'adsorption contenu dans le panier 10 et représenté à la Fig. 2 est constitué de la cartouche 20 ajustée dans le panier 10 fermé au moyen du couvercle 21.The adsorption device 1 contained in the basket 10 and shown in FIG. 2 consists of the cartridge 20 fitted in the basket 10 closed by means of the cover 21.
La cartouche 20 est entièrement remplie par la masse épurante 30. Fur ce dessin la paroi latérale 23 est représentée à claire-voie ainsi que le couvercle 21 et le fond 22. Il est préférable de réduire ou d'empêcher le passage des gaz au travers de la paroi 23 soit en adaptant une maille très fine, soit en remplaçant la paroi 23 treillissée par une paroi pleine. Les parois de la cartouche 20 sont réalisées typiquement en matière plastique ainsi que les couvercle 21 et fond 22, la paroi latérale 23 peut être envisagée en feuillard d'acier inoxydable mince.The cartridge 20 is completely filled with the purifying mass 30. In this drawing the side wall 23 is shown in openwork as well as the cover 21 and the bottom 22. It is preferable to reduce or prevent the passage of gases through of the wall 23 either by adapting a very fine mesh, or by replacing the lattice wall 23 with a solid wall. The walls of the cartridge 20 are typically made of plastic as well as the cover 21 and bottom 22, the side wall 23 can be considered in thin stainless steel strip.
La masse épurante 30 contenue dans la cartouche 20, est constituée de particules 31.The purifying mass 30 contained in the cartridge 20, is made up of particles 31.
Chaque particule telle que représentée à la Fig. 3 est revêtue d'une couche mince de substance active 32 disposée à la surface d'un support sensiblement sphérique composé d'une mousse expansée d'une matière polymérique 33. Afin que le dispositif d'adsorption de gaz soit d'une grande élasticité, les supports en matériau polymérique expansé 33 sont des billes de polystyrène expansé ou de chlorure de polyvinyle cellulaire.Each particle as shown in FIG. 3 is coated with a thin layer of active substance 32 disposed on the surface of a substantially spherical support composed of an expanded foam of a polymeric material 33. So that the gas adsorption device is of great elasticity , the material supports expanded polymer 33 are beads of expanded polystyrene or cellular polyvinyl chloride.
La substance active 32 utilisée sous forme pulvérulente est appliquée à la surface de la particule en mousse expansée à l'aide d'une substance agglutinante utilisée sous forme liquide avec éventuellement une addition d'agent tensioactif pour faciliter le mouillage.The active substance 32 used in pulverulent form is applied to the surface of the expanded foam particle using an agglutinating substance used in liquid form with optionally an addition of surfactant to facilitate wetting.
La substance active est par exemple constituée d'oxydes de fer. Les particules 31 recouvertes de la substance active, une fois séchées, sont placées dans la cartouche 20 et constituent la masse épurante 30.The active substance consists, for example, of iron oxides. The particles 31 covered with the active substance, once dried, are placed in the cartridge 20 and constitute the purifying mass 30.
Le support de la masse épurante 30 est réalisé en mousse de polystyrène mais en variante, il est réalisé en d'autres matières plastiques non biodégradables d'une masse spécifique de 15 à 50 kg/m3, telles que du polychlorure de vinyle, du polyéthylène, du polypropylène etc.The support for the purifying mass 30 is made of polystyrene foam but, as a variant, it is made of other non-biodegradable plastics with a specific mass of 15 to 50 kg / m 3 , such as polyvinyl chloride, polyethylene, polypropylene etc.
Un exemple détaillé de réalisation d'une masse épurante 30 est donné ci-après. Il est relatif à la captation de l'hydrogène sulfuré H2S produit dans un réseau d'assainissement. La substance active pour 1 'adsorption de l'hydrogène sulfuré est constituée d'oxydes de fer hydratés ou non qui fixent l'hydrogène sulfuré selon un procédé comprenant une étape intermédiaire de formation d'un sulfure de fer instable en présence d'oxygène qui régénère dans une deuxième étape les oxydes de fer et laisse le soufre sous forme élémentaire.A detailed embodiment of a purifying mass 30 is given below. It relates to the capture of hydrogen sulfide H 2 S produced in a sewerage network. The active substance for the adsorption of hydrogen sulfide consists of hydrated or non-hydrated iron oxides which fix the hydrogen sulfide according to a process comprising an intermediate step of forming an unstable iron sulfide in the presence of oxygen which regenerates in a second step the iron oxides and leaves the sulfur in elementary form.
Les essais ont porté sur la constitution d'une masse d'adsorption avec pour support d'une part des billes de polystyrène expansé de diamètre moyen 3 mm et d'autre part des billes d'argile expansée de diamètre moyen 10 mm. A des fins de comparaison nous avons calculé les caractéristiques d'un lit de billes d'argile expansée de diamètre moyen 3 mm.
Figure imgf000008_0001
The tests related to the constitution of an adsorption mass with, on the one hand, expanded polystyrene beads of average diameter 3 mm and, on the other hand, expanded clay beads of average diameter 10 mm. For comparison purposes, we calculated the characteristics of a bed of expanded clay beads with an average diameter of 3 mm.
Figure imgf000008_0001
Pour constituer la cartouche 20 destinée à être placée dans un regard de diamètre 800 mm, nous avons adopté les dimensions : diamètre 600 mm, hauteur 400 mm, volume de la masse 113 litres. Avec un support en polystyrène cette masse représentera 10,2 kg dont 7,9 kg d'oxydes de fer.To constitute the cartridge 20 intended to be placed in a sight of diameter 800 mm, we adopted the dimensions: diameter 600 mm, height 400 mm, volume of the mass 113 liters. With a polystyrene support this mass will represent 10.2 kg including 7.9 kg of iron oxides.
Avec un support en billes d'argile expansée de même diamètre (3 mm) la masse d'adsorption sera de 69,2 kg dont 8,8 kg d'oxydes de fer.With a support made of expanded clay beads of the same diameter (3 mm), the adsorption mass will be 69.2 kg, including 8.8 kg of iron oxides.
Il faut ajouter le poids de la masse d'adsorption au poids du support.The weight of the adsorption mass must be added to the weight of the support.
La Fig. 4 représente une installation d'assainissement d'eau polluée constituée d'un réseau comportant au moins une station 6 de relevage d'eaux usées ou polluées 5 alimentant une conduite en refoulement 7 où peuvent se développer des gaz indésirables 2 tels que de l'hydrogène sulfuré, un regard désorbeur composé de deux parties : une première cheminée 3' munie d'un couvercle 34 étanche aux gaz 2 recevant le flux de liquide pollué 5 issu du circuit de refoulement 7 dans sa partie supérieure 35, du dispositif de mise en vitesse et en pression 3 'a du liquide 5 et d'entraînement (mise en circulation) des gaz 2 constitué d'un convergeant suivi d'un col 36, 37 et d'un divergeant 38 assurant la désorption par détente et choc des gaz 2 contenus dans le liquide 5 ainsi que la circulation de ceux-ci par effet de trompe à eau, une seconde cheminée 3 disposée parallèlement à la première et à faible distance, munie elle aussi d'un couvercle 39 étanche aux gaz, reliée à la première cheminée 3 ' par une communication basse 40 pour le liquide 5 et les gaz 2, le liquide débarrassé des gaz indésirables étant évacué dans la section gravitaire 8 prenant naissance dans le partie basse du regard 3 opposé à la communication 40 et dans sa partie supérieure 41 par une communication haute 42 pour le seul passage des gaz 2 avec, interposé sur le passage des gaz entre ces deux communications, le dispositif d'adsorption 1 disposé fonctionnel- lement et de manière amovible en regard du dispositif de mise en vitesse et en pression du liquide lui aussi disposé entre les deux communications basse et haute entre les deux cheminées.Fig. 4 shows a polluted water treatment installation consisting of a network comprising at least one station 6 for lifting waste or polluted water 5 supplying a discharge pipe 7 where unwanted gases 2 such as hydrogen sulfide, a desorber sight composed of two parts: a first chimney 3 'provided with a gas-tight cover 34 2 receiving the flow of polluted liquid 5 coming from the discharge circuit 7 in its upper part 35, of the setting device speed and pressure 3 ′ of liquid 5 and of drive (circulation) of gases 2 consisting of a converging followed by a neck 36, 37 and a diverging 38 ensuring the desorption by expansion and shock of the gases 2 contained in the liquid 5 and the circulation thereof by the effect of a water pump, a second chimney 3 arranged parallel to the first and at a short distance, also provided with a gas-tight cover 39, connected to the first chimney 3 ' by a low communication 40 for the liquid 5 and the gases 2, the liquid freed from the undesirable gases being discharged in the gravity section 8 originating in the lower part of the manhole 3 opposite to the communication 40 and in its upper part 41 by a communication high 42 for the single passage of the gases 2 with, interposed on the passage of the gases between these two communications, the adsorption device 1 arranged functionally and detachably opposite the device for speed setting and pressure of the liquid itself also arranged between the two low and high communications between the two chimneys.
Une conduite gravitaire 8 prenant naissance à la base de la cheminée 3 aboutissant à la station d'épuration 9.A gravity pipe 8 originating at the base of the chimney 3 leading to the treatment plant 9.
Les deux cheminées du regard étant disposées verticalement, le flux de liquide pollué issu du circuit de refoulement 7 est déversé vers le bas dans le premier regard, cette orientation étant obtenue au moyen d'un coude 43 présentant une extrémité fixée au circuit de refoulement et l'autre extrémité tournée vers le bas étant située à l'intérieur de la cheminée 3', et sensiblement dans l'axe du dispositif de mise en vitesse et en pression du liquide.The two chimneys of the manhole being arranged vertically, the flow of polluted liquid coming from the discharge circuit 7 is poured down into the first manhole, this orientation being obtained by means of an elbow 43 having one end fixed to the discharge circuit and the other end facing down being located inside the chimney 3 ', and substantially in the axis of the device for speed setting and pressure of the liquid.
La circulation de l'eau 5 se fait depuis la station 6 de relevage de l'eau polluée 5 au moyen des conduites de refoulement 7 ou d'écoulement gravitaire 8 suivant la géométrie du terrain. Une pompe 7a située à la base des conduites de refoulement 7 permet d'entraîner l'eau 2. Les conduites gravitaires 8 aboutissant dans la station d'épuration 9.The water 5 is circulated from the polluted water lifting station 6 by means of the delivery pipes 7 or gravity flow 8 according to the geometry of the terrain. A pump 7a located at the base of the discharge lines 7 makes it possible to drive water 2. The gravity pipes 8 ending in the treatment plant 9.
Le regard épurateur situé entre la conduite de refoulement 7 et la conduite gravitaire 8 assure la continuité de la circulation d'eau 5 entre ces deux conduites et a pour fonction d'assurer par choc la desorption des gaz indésirables 2 formés dans la section en refoulement et tout particulièrement l'hydrogène sulfuré H2S. La masse d'adsorption 1 placée dans la cheminée 3 est telle que définie ci-dessus. The purifying manhole located between the discharge pipe 7 and the gravity pipe 8 ensures the continuity of the water circulation 5 between these two pipes and has the function of ensuring by shock the desorption of the undesirable gases 2 formed in the discharge section. and especially hydrogen sulfide H2S. The adsorption mass 1 placed in the chimney 3 is as defined above.

Claims

REVENDICATIONS
1.- Dispositif d'adsorption de gaz comprenant une cartouche (20) constituée d'au moins une paroi latérale (23) sensiblement étanche, reposant sur un fond poreux (22) contenant un lit adsorbant, caractérisé par le fait que le lit adsorbant est constitué d'éléments adsorbants formés par des supports sensiblement sphériques en matériau polymérique expansé revêtu d'une couche mince de matière active, ladite cartouche étant fermée par un couvercle poreux (21). 1.- Gas adsorption device comprising a cartridge (20) consisting of at least one substantially sealed side wall (23), resting on a porous bottom (22) containing an adsorbent bed, characterized in that the adsorbent bed consists of adsorbent elements formed by substantially spherical supports of expanded polymeric material coated with a thin layer of active material, said cartridge being closed by a porous cover (21).
2.- Dispositif selon la revendication 1, caractérisé par le fait que la cartouche (20) iemplit un panier (10) comportant au moins une poignée de manipulation (12).2.- Device according to claim 1, characterized in that the cartridge (20) iemplit a basket (10) having at least one handling handle (12).
3.- Dispositif selon la revendication 1 ou 2, caractérisé par le fait que l'élément adsorbant comprend une substance agglutinante et un agent tensioactif.3.- Device according to claim 1 or 2, characterized in that the adsorbent element comprises an agglutinating substance and a surfactant.
4.- Dispositif selon l'une des revendications 1 à 3, caractérisé par le fait que la cartouche (20) et le panier (12) sont cylindriques. 4.- Device according to one of claims 1 to 3, characterized in that the cartridge (20) and the basket (12) are cylindrical.
5.- Dispositif selon l'une des revendications 1 à 4, caractérisé par le fait que la substance active est constituée d'oxydes de fer.5.- Device according to one of claims 1 to 4, characterized in that the active substance consists of iron oxides.
6.- Dispositif selon l'une des revendications 1 à 5, caractérisé par le fait que les supports en matériau polymérique expansé sont des billes de polystyrène expansé ou de chlorure de polyvinyle cellulaire.6.- Device according to one of claims 1 to 5, characterized in that the supports made of expanded polymeric material are beads of expanded polystyrene or cellular polyvinyl chloride.
7.- Procédé de fabrication d'un dispositif typiquement conforme à l'une des revendications 1 à 6, caractérisé en ce qu'il comprend les étapes successives suivantes :7.- A method of manufacturing a device typically according to one of claims 1 to 6, characterized in that it comprises the following successive steps:
Introduction d'au moins, un matériau polymérique expansé, une matière active sous forme pulvérulente, de l'eau ou un solvant approprié et une substance agglutinante dans un récipient étanche et confiné ; agitation dudit récipient ; retrait du récipient de l'ensemble formé par le matériau polymérique expansé, la matière active, 1 'eau ou le solvant et la substance agglutinante ; - séchage.Introduction of at least one expanded polymeric material, an active material in powder form, water or a suitable solvent and an agglutinating substance in a sealed and confined container; shaking said container; removing the container from the assembly formed by the expanded polymeric material, the active material, water or solvent and the agglutinating substance; - drying.
8.- Installation d'assainissement de liquide pollué ou usé (5) constituée d'un réseau comportant au moins, une station de relevage (6) de l'eau usée, reliée à des conduites de refoulement (7) ou d'écoulement gravitaire (8) suivant la géométrie du terrain, une pompe étant située à la base des conduites de refoulement, les conduites gravitaires aboutissant dans une station d'épuration (9), un regard assurant la jonction des J conduites de refoulement (7) aux conduites gravitaires (8), au moins un de ces regards étant constitué de deux cheminées (3, 3' 5) reliées entre elles au niveau de leurs parties respectivement hautes et basses, la première cheminée (3') présentant au niveau de sa partie médiane un rétrécissement (3 'a) formant dispositif de remise en vitesse et en pression, la deuxième cheminée (3) comprenant dans sa partie médiane un dispositif d'adsorption (1), caractérisée en ce que le dispositif d'adsorption (1) est conforme à 1 'une quelconque des revendications 1 à 6.8.- Installation for cleaning up polluted or used liquid (5) consisting of a network comprising at least one lifting station (6) for used water, connected to discharge (7) or flow lines gravity (8) according to the geometry of the ground, a pump being located at the base of the discharge pipes, the gravity pipes ending in a treatment plant (9), a manhole ensuring the junction of the J discharge pipes (7) gravity pipes (8), at least one of these manholes consisting of two chimneys (3, 3 '5) connected to each other at their high and low parts respectively, the first chimney (3') having at its part median a narrowing (3 'a) forming a speed and pressure recovery device, the second chimney (3) comprising in its middle part an adsorption device (1), characterized in that the adsorption device (1) conforms to any of the claims 1 to 6.
9.- Installation selon la revendication 8, dans laquelle le regard formant la jonction entre la conduite de refoulement (7) et la conduite gravitaire (8) comprend : une première cheminée (31) munie d'un couvercle (34) étanche aux gaz (2) recevant le flux de liquide pollué (5) issu du circuit de refoulement (7) dans sa partie supérieure (35) du dispositif de mise en vitesse et en pression (3 'a) du liquide (5) et d'entraînement (mise en circulation) des gaz (2) constitué d'un convergeant suivi d'un col (36, 37) et d'un divergeant (38) assurant la desorption par détente et choc des gaz (2) contenus dans le liquide (5) ainsi que la circulation de ceux-ci par effet de trompe à eau, une seconde cheminée (3) disposée parallèlement à la première et à faible distance, munie elle aussi d'un couvercle (39) étanche aux gaz, reliée à la première cheminée (3' ) par une communication basse (40) pour le liquide (5) et les gaz (2), le liquide débarrassé des gaz indésirables étant évacué dans la section gravitaire (8) prenant naissance dans la partie basse du regard (3) opposé à la communication (40) et dans sa partie supérieure (41) par une communication haute (42) pour le seul passage des gaz (2) avec, interposé sur le passage des gaz entre ces deux communications, le dispositif d'adsorption (1) disposé fonctionnellement et de manière amovible en regard du dispositif de mise en vitesse et en pression du liquide lui aussi disposé entre les deux communications basse et haute entre les deux cheminées.9.- Installation according to claim 8, wherein the manhole forming the junction between the discharge pipe (7) and the gravity pipe (8) comprises: a first chimney (3 1 ) provided with a cover (34) sealed against gas (2) receiving the flow of polluted liquid (5) from the discharge circuit (7) in its upper part (35) of the device for speed and pressure (3 'a) of the liquid (5) and entrainment (circulation) of gases (2) consisting of a converging followed by a neck (36, 37) and a diverging (38) ensuring the desorption by expansion and shock of the gases (2) contained in the liquid (5) as well as the circulation thereof by the effect of a water pump, a second chimney (3) arranged parallel to the first and at a short distance, also provided with a gas-tight cover (39), connected to the first chimney (3 ') by a low communication (40) for the liquid ( 5) and the gases (2), the liquid freed from undesirable gases being discharged in the gravity section (8) originating in the lower part of the manhole (3) opposite the communication (40) and in its upper part (41) by a high communication (42) for the only passage of gases (2) with, interposed on the passage of gases between these two communications, the adsorption device (1) arranged functionally and removably opposite the setting device speed and pressure of the liquid also disposed between the two low and high communications between the two chimneys.
10.- Installation selon l'une des revendications 8 ou 9 dans laquelle les deux cheminées (3, 3') étant disposées verticalement, et le flux de liquide pollué issu du circuit de refoulement (7) est déversé vers le bas dans le premier regard, cette orientation étant obtenue au moyen d'un coude (43) présentant une extrémité fixée au circuit de refoulement et l'autre extrémité tournée vers le bas étant située à l'intérieur de la cheminée (3'), et sensiblement dans l'axe du dispositif de mise en vitesse et en pression du liquide.10.- Installation according to one of claims 8 or 9 wherein the two chimneys (3, 3 ') being arranged vertically, and the flow of polluted liquid from the discharge circuit (7) is poured down into the first manhole, this orientation being obtained by means of an elbow (43) having one end fixed to the discharge circuit and the other end facing down being located inside the chimney (3 '), and substantially in the axis of the device for speed setting and pressure of the liquid.
11.- Utilisation d'un dispositif conforme à l'une des revendications 1 à 6 pour éliminer l'hydrogène sulfuré compris dans une eau polluée. 11.- Use of a device according to one of claims 1 to 6 for removing hydrogen sulfide included in polluted water.
PCT/FR1993/000826 1992-09-04 1993-08-25 Method for fabricating a gas adsorption means, adsorption means and sanitazing plant WO1994005401A1 (en)

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FR9210734A FR2695382B1 (en) 1992-09-04 1992-09-04 Liquid sanitation device and its use.
FR92/10734 1992-09-04
FR9302294A FR2701864B1 (en) 1993-02-22 1993-02-22 Method for manufacturing a gas adsorption means, adsorption means and corresponding sanitation installation.
FR93/02294 1993-02-22

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DE19853529A1 (en) * 1998-11-20 2000-05-25 Dieter A Hiller Rain water filter insert held within mantle amorphous iron oxide and keeping discharge impurities to within legal limits
EP1819420A1 (en) * 2004-11-08 2007-08-22 Trustees Of Tufts College Apparatus and methods for non-regenerative and regenerative hot gas desulfurization
WO2011071406A1 (en) * 2009-12-12 2011-06-16 Universidade De Lisboa Method and micro device for the extraction of traces of chemical substances with different polarities
NL1043558B1 (en) * 2020-02-05 2021-09-13 Johannes Wilhelmus Kramer Paulus Rectangular or square or cylindrical filter element, made of metal or plastic, filled with hydro granules or permeable sintered clay granules as filtrate, which is held by a fine mesh metal or plastic mesh, as dust filter and or gas filter element.

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FR516103A (en) * 1920-05-28 1921-04-14 Pierre Gandillon Septic tank with nitrifier bed for rural house
US2581684A (en) * 1947-06-09 1952-01-08 Western Sales Agency Corp Desiccator
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EP0856345A1 (en) * 1997-02-03 1998-08-05 HWG Havelländische Wasser GmbH & Co. KG Assembly for degassing ground and/or waste water
DE19853529A1 (en) * 1998-11-20 2000-05-25 Dieter A Hiller Rain water filter insert held within mantle amorphous iron oxide and keeping discharge impurities to within legal limits
EP1819420A1 (en) * 2004-11-08 2007-08-22 Trustees Of Tufts College Apparatus and methods for non-regenerative and regenerative hot gas desulfurization
EP1819420A4 (en) * 2004-11-08 2010-01-20 Tufts College Apparatus and methods for non-regenerative and regenerative hot gas desulfurization
US7871459B2 (en) 2004-11-08 2011-01-18 Trustees Of Tufts College Apparatus and methods for non-regenerative and regenerative hot gas desulfurization
WO2011071406A1 (en) * 2009-12-12 2011-06-16 Universidade De Lisboa Method and micro device for the extraction of traces of chemical substances with different polarities
NL1043558B1 (en) * 2020-02-05 2021-09-13 Johannes Wilhelmus Kramer Paulus Rectangular or square or cylindrical filter element, made of metal or plastic, filled with hydro granules or permeable sintered clay granules as filtrate, which is held by a fine mesh metal or plastic mesh, as dust filter and or gas filter element.

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