EP2547425A1 - Selective gas filter - Google Patents
Selective gas filterInfo
- Publication number
- EP2547425A1 EP2547425A1 EP11709119A EP11709119A EP2547425A1 EP 2547425 A1 EP2547425 A1 EP 2547425A1 EP 11709119 A EP11709119 A EP 11709119A EP 11709119 A EP11709119 A EP 11709119A EP 2547425 A1 EP2547425 A1 EP 2547425A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter according
- reservoirs
- walls
- selective
- tanks
- 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.)
- Ceased
Links
Classifications
-
- 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
- B01D53/24—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 centrifugal force
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B23/00—Noble gases; Compounds thereof
- C01B23/001—Purification or separation processes of noble gases
- C01B23/0036—Physical processing only
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/02—Treating gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/16—Hydrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/10—Single element gases other than halogens
- B01D2257/11—Noble gases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0029—Obtaining noble gases
- C01B2210/0039—Radon
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0043—Impurity removed
- C01B2210/0053—Hydrogen
Definitions
- the invention relates to a gas selective filter, designed in particular for separating very different molecular weight gases in a low velocity stream. It also relates to an application of this filter to radon confinement by separating it from a lighter gas such as hydrogen, the evacuation of which is sought on the contrary.
- the field that is at the origin of the invention is the filtration of gaseous mixtures from nuclear waste drums, which produce hydrogen and radon, the latter being radioactive and therefore dangerous; but its short life span (period of about 4 days) does not require that it is permanently fixed, but only that it is retained in the filter for a limited time until its disappearance. Complete evacuation of hydrogen outward, where it disperses, is sought on the contrary because of its flammable nature.
- the invention relates instead to a filter provided with a very good selectivity, capable of retaining about 100% of radon and only 2% of hydrogen when it is traveled at low speed and low flow rate by a gaseous mixture containing these constituents, thanks to to a particular form.
- EP-A-9 089 479 discloses a gas filter which is rather a gas separator according to their atomic weights. The separation is done by deflectors in which the gases are projected at high speed and that only the light components can follow, while the heavy components are driven by their inertia towards other branches of exit of the filter. A pump is needed to communicate the required speed to the mixture.
- the invention is used on the contrary in conditions quasi-static for small influxes of gaseous mixtures and operates without separating the components or exploiting forces of inertia of the current, but by slowing the progression of heavy components by obstacles and by exploiting the inertia of some of these components so that they never leave the filter.
- DE-A-196 50 266 discloses a radon filter wherein a reservoir contains plates arranged in a baffle, which stop the radon, but which are actually particle absorption plates on which the radon is supposed to be fixed. It does not teach to separate two free gases in a mixture.
- the filter of the invention is characterized in that it comprises a plurality of tanks arranged in series and interconnected by conduits. It was found that the large section ratios between the tanks and the intermediate pipes allowed them to sufficiently slow down the heavy constituents of the mixtures, whereas the light constituents had no difficulty in following the section variations. of the filter, bypassing the obstacles and crossing it completely.
- the tanks can thus be occupied by successive quibbles imposing a tortuous path; the baffles are advantageously walls occupying successive sections of the reservoirs between an inlet orifice and an outlet orifice, except slots arranged alternately on two opposite lateral sides of the reservoirs, and the walls are inclined towards the inlet orifice. direction of the slits.
- the filter comprises an inlet in a first reservoir consisting of a battery of conduits each having a length at least thirty times greater than an inner diameter; while the ducts interconnecting the reservoirs are advantageously single tubes having an internal diameter at least ten times greater than that of the ducts of the battery.
- the reservoirs each to have an inlet duct and an outlet duct opening on portions of inlet and outlet walls of the tank which are opposed with respect to a center line of the reservoir extending from one to the other of said walls.
- FIGS. 1 and 2 Two embodiments of the invention will now be fully described by means of FIGS. 1 and 2. These embodiments are not limiting of invention, and serve only to illustrate its most important aspects.
- Figure 1 shows a first embodiment. It comprises three cisterns 1, 2 and 3 cylindrical or parallelepiped connected in series by ducts 4 and 5, and further comprising a battery 6 of inlet ducts 7 thinner than the previous and an outlet duct 8. All these elements are arranged in succession so that a gaseous flow passing through the filter passes first through the conduits 7 of the battery 6, then through the reservoir 1, the conduit 4, the reservoir 2, the conduit 5, the reservoir 3 and the outlet duct 8. No gas separation being made by a flow bifurcation, the outlet duct 8 is unique and the inside of the filter forms a single flow path.
- the conduits generally open into the tanks 1, 2 and 3 by opposite and extreme faces (or close to these faces, which is true for the battery 6) so that the gas flow travels along their length.
- the inlet and outlet orifices of the ducts in each of the tanks 1, 2 and 3 are staggered or staggered, that is to say that they open on portions of this wall which are opposed to each other. with respect to longitudinal median axes of the reservoirs (in dotted lines in the figure). It has been found that this arrangement considerably favors the selectivity of each of the tanks, making it much easier to block the heaviest constituent.
- the ducts 7 of the battery 6 have diameters of the order of one millimeter and lengths of the order of the decimetre. Their function is still to help selectivity; However, they have the disadvantage of also blocking somewhat the light components of the mixture, and that is why their use is not generalized in the filter and the other conduits, which connect the tanks and the outlet duct, are single tubes whose diameter is large compared to that of the ducts 7, of the order of ten times more or more.
- the battery 6 can also be omitted in many cases with acceptable results, but optimal results have often been obtained by using it with a certain parsimony, and that is why it is proposed only at the input of the filter in this production.
- the number of tanks could be changed. It appeared that a plurality of tanks was probably essential to obtain good results. Satisfactory selectivity is often obtained with three reservoirs. A higher number of reservoirs could further improve selectivity, but the filter would be more complicated. Their volume can be of a few liters.
- baffles 9 inside the tanks 2 and 3. These are plates which obstruct successive sections except slots 10 at one edge.
- the slots 10 are arranged alternately on opposite sides 11 and 12 of the side wall of each of the tanks 1, 2 and 3.
- the baffles 9 are inclined towards the inlet port of the tanks towards the slots. It has been found that these Baffles 9 formed pockets strongly promoting the stagnation of heavier constituents of the gas mixture, without almost hinder the diffusion of the lighter components. The stagnation is all the better that the flow is at a low flow rate setting up quasi-static conditions, that is to say where the flow velocity is too small to have a real effect based for example on the forces of water. 'inertia. Some baffles 9 may suffice in each of the reservoirs 1, 2 and 3.
- the selectivity is generally correlated with variations in the characteristics of the flow inside the filter in the direction and in the cross-section, that is to say at the tortuosity of the flow: it is increased with the number of reservoirs, the length and the smoothness of the intermediate conduits and the presence of batteries corresponding to divisions of these conduits, but the baffles are the most effective means of the establish.
- the best selectivity will often be obtained with a rather permeable filter as a whole, provided with a moderate number of reservoirs and rather wide pipes, but with a fairly abundant network of baffles 9. If their number is very important, several tens per tank for example, no noticeable progress in selectivity is no longer achieved however.
- the material of the constituents of the filter is not critical since no effect other than the modification of the characteristics of the flow is sought.
- FIG. 2 Another embodiment is shown in FIG. 2. It comprises here a single housing 13 and the reservoirs 14 are compartments contiguous to each other, parallel and separated by partitions 15 which are connected baffles 9 unchanged from the previous embodiment except that their numbers, their inclinations and their The distributions here are different from one tank 14 to another, without this changing the operation of the filter.
- the ducts 4 and 5 connecting the tanks are here replaced by internal ducts 16 bent half-turn through the partitions 15, supported by them at their center and whose ends open into two adjacent tanks 14.
- This embodiment comprises ten reservoirs 14.
- the outlet duct 8 is unchanged.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1052004A FR2957527B1 (en) | 2010-03-19 | 2010-03-19 | SELECTIVE GAS FILTER |
PCT/EP2011/054064 WO2011113901A1 (en) | 2010-03-19 | 2011-03-17 | Selective gas filter |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2547425A1 true EP2547425A1 (en) | 2013-01-23 |
Family
ID=42985316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11709119A Ceased EP2547425A1 (en) | 2010-03-19 | 2011-03-17 | Selective gas filter |
Country Status (6)
Country | Link |
---|---|
US (1) | US8663353B2 (en) |
EP (1) | EP2547425A1 (en) |
JP (1) | JP2013525086A (en) |
CN (1) | CN102821832B (en) |
FR (1) | FR2957527B1 (en) |
WO (1) | WO2011113901A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103832712B (en) * | 2014-02-28 | 2016-06-15 | 信阳师范学院 | A kind of glass bead product collects special feed bin |
US11221346B2 (en) * | 2017-03-13 | 2022-01-11 | Honeywell International Inc. | Ice prevention dam for, and method for forming, a pitot tube |
US10126320B2 (en) * | 2017-03-13 | 2018-11-13 | Honeywell International Inc. | Arrangement of dams in air data probe |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993008145A1 (en) * | 1991-10-25 | 1993-04-29 | Mobil Oil Corporation | Combined paraffin isomerization/ring opening process |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4937702B1 (en) * | 1970-12-28 | 1974-10-11 | ||
US3944646A (en) * | 1972-05-11 | 1976-03-16 | Union Carbide Corporation | Radioactive krypton gas separation |
JPS5213600B2 (en) * | 1973-09-07 | 1977-04-15 | ||
JPS51137768U (en) * | 1975-04-30 | 1976-11-06 | ||
JPS53130398U (en) * | 1977-03-23 | 1978-10-16 | ||
DE2933570C3 (en) * | 1979-08-18 | 1982-02-25 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Process for making separation nozzle elements |
DE3206821C2 (en) | 1982-02-26 | 1984-02-02 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Process for the separation of light additional gas in separating nozzle cascades |
JPH0738972B2 (en) * | 1987-09-02 | 1995-05-01 | 住友石炭鉱業株式会社 | Fluid separation method |
US5050508A (en) * | 1990-10-09 | 1991-09-24 | Hcr | System for the incineration of refuse and the treatment of the incineration exhaust gasses |
CN1032847C (en) * | 1991-08-02 | 1996-09-25 | 禹杰 | Equipment for separation of gases |
JPH0947800A (en) * | 1995-08-11 | 1997-02-18 | Nippon Maintech Kk | Method for discharging sludge to be recycled in sewage treating device by activated carbon and its discharge structure |
DE19650266A1 (en) * | 1996-12-04 | 1998-06-10 | Ruediger Dr Wuertz | Process for improving radiation charge by radon |
CN2562853Y (en) * | 2002-07-26 | 2003-07-30 | 天津吉麦克环保科技有限公司 | Air purifier |
CN2889453Y (en) * | 2006-04-19 | 2007-04-18 | 赵冲 | Efficient gas-filtering device |
US8372632B2 (en) * | 2006-06-14 | 2013-02-12 | Malcolm Glen Kertz | Method and apparatus for CO2 sequestration |
-
2010
- 2010-03-19 FR FR1052004A patent/FR2957527B1/en active Active
-
2011
- 2011-03-17 WO PCT/EP2011/054064 patent/WO2011113901A1/en active Application Filing
- 2011-03-17 US US13/635,705 patent/US8663353B2/en not_active Expired - Fee Related
- 2011-03-17 EP EP11709119A patent/EP2547425A1/en not_active Ceased
- 2011-03-17 CN CN201180014844.6A patent/CN102821832B/en not_active Expired - Fee Related
- 2011-03-17 JP JP2012557557A patent/JP2013525086A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993008145A1 (en) * | 1991-10-25 | 1993-04-29 | Mobil Oil Corporation | Combined paraffin isomerization/ring opening process |
Also Published As
Publication number | Publication date |
---|---|
FR2957527A1 (en) | 2011-09-23 |
US20130025244A1 (en) | 2013-01-31 |
WO2011113901A1 (en) | 2011-09-22 |
FR2957527B1 (en) | 2014-10-10 |
CN102821832B (en) | 2015-12-09 |
JP2013525086A (en) | 2013-06-20 |
CN102821832A (en) | 2012-12-12 |
US8663353B2 (en) | 2014-03-04 |
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Legal Events
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