WO2003013700A1 - Procede et dispositif pour la fabrication de gaz comprime sec - Google Patents
Procede et dispositif pour la fabrication de gaz comprime sec Download PDFInfo
- Publication number
- WO2003013700A1 WO2003013700A1 PCT/FR2001/002577 FR0102577W WO03013700A1 WO 2003013700 A1 WO2003013700 A1 WO 2003013700A1 FR 0102577 W FR0102577 W FR 0102577W WO 03013700 A1 WO03013700 A1 WO 03013700A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- filter
- dry
- air
- enclosure
- 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
- B01D53/22—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 diffusion
- B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/268—Drying gases or vapours by diffusion
Definitions
- the gas, the gas mixture or the air which must be dried is introduced into a first column or a tower containing the adsorbent material.
- the water in the air is adsorbed and the material becomes charged with water vapor.
- a second column of the same type is regenerated.
- Pipes, valves and control systems allow the circulation between the two columns to be interrupted or resumed. Then, we repeat the process. Because two pressure columns, valves and control systems are used, adsorption dryers are complex and expensive.
- the regeneration of the adsorbent material can be done in several ways.
- a first method consists in increasing the temperature of the adsorbent bed, during the regeneration phase, so as to desorb the humidity.
- Another method for regenerating the adsorbent material is to subject it to an abrupt low pressure during the regeneration phase.
- a second object of the invention is to provide a compressed air drying device which does not require periodic maintenance either.
- a third object of the invention is to provide a device for drying compressed air which does not require refrigerating gas such as Freon or C.F.C.
- a fourth object of the invention is to provide a device having no electrical connection, which makes it possible to use it in an explosion-proof zone.
- Another object of the invention is to provide a method of drying the compressed air which gives immediate obtaining of the dew point.
- a final object of the invention is to provide dry compressed air which can be used for human respiration.
- the invention relates to a method for manufacturing a gas or mixture of gases, compressed, dry, characterized in that the following steps are carried out:
- the compressed gas or mixture of gases is sent, after drying, to a pressure tank and the mixture is homogenized.
- the compressed gas is air.
- a device for implementing the method according to one of the preceding claims characterized in that it comprises a drying chamber in which parallel hollow tubes are placed, the wall tubes consisting of a membrane permeable to water vapor, a wet compressed air inlet at one end of the tubes, a dry compressed air outlet at the opposite end of the tubes, a dry air inlet in the enclosure, the dry air circulating in the enclosure, outside the tubes, a humid air outlet from the drying enclosure, traps of oxides and dioxides of carbon and sulfur, comprising in particular d a carbon dioxide retention filter and means for periodically removing carbon dioxide from the retention filter.
- the means for periodically removing carbon dioxide from the filter consist of counter-current sweeping means of the filter using a neutral gas.
- the device comprises dust filters, possibly an oil filter, placed upstream of the enclosure, and an antibacterial filter placed downstream of the drying enclosure.
- the catalyst filter is filled with granules composed of manganese oxide, copper oxide and manganese carbonate and having a particle size between 1 and 3.5 mm.
- the retention filter is filled with a molecular sieve of synthetic zeolites of crystal structure of type X, comprising a network of pores with effective diameter of 10 angstroms and having a particle size between 1, 6 and 2.5 mm.
- the scanning means consist of a neutral gas inlet pipe into the retention filter, the neutral gas arriving through the pipe and sweeping the screen against the current to drive out the carbon dioxide.
- the neutral gas is dioxygen.
- the dry compressed air is that manufactured by the device and used for a hygrometry test.
- dry compressed air obtained by the process described above.
- this dry compressed air obtained can be used in the food industry and in the field of civil security.
- Figure 4 is a schematic view of a third embodiment of the invention.
- Figure 5 is a front view of the device according to the invention, according to the second embodiment.
- Figure 6 is a top view of the device according to the invention, according to the second embodiment.
- Figure 7 is a sectional view of a filter.
- Figure 8 is a sectional view of a carbon dioxide retention filter.
- Figure 9 shows the direction of air passage through the filters.
- FIG. 1 there is shown an enclosure (1) in which is placed one or more hollow tubes (2). These hollow tubes (2) or hollow fibers have a wall which is a membrane permeable to water vapor.
- the tubes (2) are placed parallel to each other.
- the enclosure (1) comprises a supply line (3) which is connected to the ends (4) of the tubes (2) and an outlet line (5) which is connected to the opposite ends (6) of the tubes (2) .
- the outlet pipe (5) comprises a branch (7) of reduced size compared to the outlet pipe and which opens into the enclosure (1), outside the tubes or fibers (2).
- the enclosure (1) has a lateral outlet (8).
- the enclosure (1) shown in Figure 1 is a membrane dryer, the operation of which is as follows:
- the compressed gas, or the compressed gas mixture enters through the supply line (3), into the tubes (2).
- the gas mixture is compressed air.
- This compressed air can for example be at a pressure of between approximately 8 and approximately 12 bar, preferably between 9 and
- Compressed air enters the supply line (3) in a direction according to Arrow F1.
- Compressed air enters the tubes (2) through their ends (4) which are connected to the supply line (3).
- Compressed air moves from the ends (4) of the tubes (2) to the opposite ends (6) of the tubes (2).
- the water molecules pass through the walls of the tubes (2), these walls being permeable to water vapor and impermeable to other gases. Water vapor is therefore stored inside (9) of the enclosure (1).
- the dry compressed air exits through the outlet pipe (5), in the direction of Arrow F2.
- the interior (9) of the enclosure (1) is saturated with water vapor, part of the dry air bypassed, through the outlet pipe (5), and the bypass (7), at the inside (9) of the enclosure (1), in the direction of the arrow F3 evacuates the water vapor.
- FIG. 2 shows an embodiment of the invention, this embodiment being the simplest.
- the device shown schematically in Figure 2 can be used, for example in a hospital or clinic which is already equipped with an air compressor. Two cases can arise: the compressor in the hospital or clinic is an oil compressor or else a compressor of another kind.
- the compressor When the compressor is an oil compressor, it supplies compressed air comprising oil. This is the reason why, before reaching the enclosure (1), the compressed air passes through an oil separator (10).
- the device according to the invention does not comprise an oil separator.
- the device according to the invention comprises one or more dust filters.
- it includes a micron filter (11) of 1 micron and a submicron filter (12) of 0.01 micron, upstream of the drying chamber (1).
- the device according to the invention comprises a catalyst filter (13) making it possible to transform carbon monoxide into carbon dioxide, then downstream a retention filter (14) making it possible to retain the carbon dioxide and, still downstream, a deodorization filter (15) with activated carbon and an antibacterial filter (16) of 0.01 micron.
- the catalyst filter (13) is filled with black granules
- HOPCALITE of dimensions between 1 and 3.5 mm and whose average composition is 57% manganese oxide, 13% copper oxide, 30% manganese carbonate.
- the apparent density of the mixture is 1 and this filter is regenerated during the periods when the compressor does not work.
- the granules are arranged in the body of the filter (13) which is identical from the point of view of constitution to that (140) represented in FIG. 7.
- the cylindrical body (141) ends at one end by a shoulder (1410) against which comes to bear a perforated grid (145) and above this grid a plug (142) is crimped in the cylindrical body (141) by the upper ends of the cylindrical body folded over the plug (142).
- This plug has holes (143, 144) and a threaded blind hole allowing it to be fixed on the associated filter caps (139, 149, 159, 169).
- the other end of the cylindrical body also has a shoulder (1411) against which abuts a perforated grid (146) held against the shoulder by a circlip (148) which is received in a groove in the body (141).
- the empty space of the filter (147) is filled with granules of either catalysts, molecular sieves or activated carbon depending on the type of filter.
- FIG. 9 in FIG. 9 is shown the direction (defined by the arrows) of the passage of air through the catalysis filter (13), the filter (14) of retention, the deodorization filter (15) and the antibacterial filter (16), placed one behind the other.
- the air passing through the retention filter (14) arrives through a grid (140) of larger section than the outlet (141) of the filter (14). In this way, the air remains and takes longer to exit the filter and the carbon dioxide is better retained by the balls.
- FIG 3 there is shown another embodiment of the device according to the invention.
- This device includes a homogenizer (17).
- the air which is compressed is atmospheric air, and depending on the quality of the ambient air, the components of the compressed air can vary.
- the homogenizer (17) a dry compressed air is obtained which is of substantially constant composition.
- the homogenizer (17) includes a pressure switch (18) or an electronic pressure sensor.
- the device according to the invention is such that when the pressure of dry compressed air drops in the homogenizer (17), the pressure switch trips and starts the compressor.
- the device according to the invention operates only according to demand, namely, when no dry compressed air is pumped at the outlet (19), the compressor is stopped and it does not triggers only when dry compressed air is pumped.
- a non-return valve (20) closes the dry compressed air supply line to the homogenizer (17).
- the retention filter (14) shown in FIG. 8 comprises means for obtaining the desorption of carbon dioxide and for driving the carbon dioxide out of the filter (14). These means therefore make it possible to clean the retention filter (14) when the balls are or become saturated with carbon dioxide. This cleaning is carried out periodically when the device according to the invention does not work. This cleaning is carried out suddenly by scanning against the current of the retention filter (14) using a neutral gas. In this way the retention filter (14) becomes more efficient and this makes it possible to reduce the amount of carbon dioxide present in the dry compressed air obtained. finally by the device according to the invention.
- a duct (280) has one end joining the outlet duct (141) of the retention filter (14) leading to the deodorization filter (15).
- this duct (280) has its other end connected to a device (28) for distributing a neutral gas.
- the arrival of the neutral gas is controlled by a solenoid valve (283) and the neutral gas is sent against the current in the retention filter (14) to expel the retained carbon dioxide and thus clean the filter (14).
- the carbon dioxide is discharged through the grid (140) of the filter and through a conduit (281) to the outside of the device according to the invention.
- the neutral gas could for example be oxygen or air 78/22.
- the device (28) for distributing neutral gas is unnecessary since the dry compressed air obtained according to the invention is used. As shown in Figure 4, an air sample is taken after passing through the homogenizer (17).
- This air is analyzed for example using an analyzer (29), the hygrometry rate of the air obtained.
- the air samples once analyzed are released to the atmosphere.
- the principle of the invention consists in using this dry compressed air intended solely for hygrometric analysis to sweep against the current the retention filter (14).
- This air is pure according to the invention and the advantage lies in the fact that it is not necessary to have the external neutral gas distribution device (28).
- a non-return valve (282) is placed on the neutral gas inlet pipe to prevent the gas from going backwards.
- the dotted path represents the case where the device (28 ) distribution is used and the solid line path the one where the compressed air from the hygrometric analysis is used.
- the device shown in Figure 4 is a complete device that can be supplied to a hospital or clinic that is not already equipped with a compressor.
- This group is compact and autonomous.
- This device comprises, upstream of the enclosure (1), a micron filter (11), a submicron filter (12), and downstream of the drying enclosure (1), a catalyst filter (13), a retention (14), a deodorizing filter (15) and an antibacterial filter (16), a homogenizer (17), a non-return valve (20).
- the device further comprises a compressor (21) and possibly a second compressor (22), upstream of the filters (11) and (12).
- These compressors (21, 22) are preferably chosen without oil, which makes the oil separator unnecessary.
- FIGs 5 and 6 there is shown a device according to the invention, in front view and in top view.
- the homogenizer (17) has at its upper end a safety valve (23) and a pressure gauge (24) for pressure measurement.
- the drying enclosure (1) is placed so that its longitudinal axis is vertical.
- the wet compressed gas enters the filters (11, 12), via the pipe (25), according to the arrow F1 and leaves the homogenizer (17) by one or more outlet pipes (26, 27) according to the arrows F2 , F'2.
- the device according to the invention can be placed on a support (28) on which the various members are fixed.
- the dry compressed air obtained with the device according to the invention therefore has a quality superior to the AFNOR standard since the contents of oil, water vapor, carbon monoxide, carbon dioxide, sulfur dioxide, monoxide and dioxide of nitrogen are lower.
- an ozonator making it possible to manufacture ozone by electrolysis of oxygen can be placed at the outlet of the drying enclosure (1).
- this dry compressed air can be used for example in the field of civil security to fill air bottles. It can also be used in the food industry, for example to carry out the growth of milk powders or the profusion.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drying Of Gases (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FR2001/002577 WO2003013700A1 (fr) | 2001-08-08 | 2001-08-08 | Procede et dispositif pour la fabrication de gaz comprime sec |
| EP01963077A EP1425082A1 (fr) | 2001-08-08 | 2001-08-08 | Procede et dispositif pour la fabrication de gaz comprime sec |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FR2001/002577 WO2003013700A1 (fr) | 2001-08-08 | 2001-08-08 | Procede et dispositif pour la fabrication de gaz comprime sec |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003013700A1 true WO2003013700A1 (fr) | 2003-02-20 |
Family
ID=8860435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2001/002577 Ceased WO2003013700A1 (fr) | 2001-08-08 | 2001-08-08 | Procede et dispositif pour la fabrication de gaz comprime sec |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1425082A1 (fr) |
| WO (1) | WO2003013700A1 (fr) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0571997A1 (fr) * | 1992-05-29 | 1993-12-01 | Air Products And Chemicals, Inc. | Eliminer l'eau dans un gaz humide |
| US5605564A (en) * | 1996-02-14 | 1997-02-25 | Howell Laboratories, Inc. | Membrane gas dehydrator |
| WO2001034280A1 (fr) * | 1999-11-12 | 2001-05-17 | Porous Media Corporation | Systemes a gaz comprimes utilisant un deshydrateur d'air a membrane a pression variable, et mode de mise en oeuvre |
-
2001
- 2001-08-08 WO PCT/FR2001/002577 patent/WO2003013700A1/fr not_active Ceased
- 2001-08-08 EP EP01963077A patent/EP1425082A1/fr not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0571997A1 (fr) * | 1992-05-29 | 1993-12-01 | Air Products And Chemicals, Inc. | Eliminer l'eau dans un gaz humide |
| US5605564A (en) * | 1996-02-14 | 1997-02-25 | Howell Laboratories, Inc. | Membrane gas dehydrator |
| WO2001034280A1 (fr) * | 1999-11-12 | 2001-05-17 | Porous Media Corporation | Systemes a gaz comprimes utilisant un deshydrateur d'air a membrane a pression variable, et mode de mise en oeuvre |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1425082A1 (fr) | 2004-06-09 |
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