WO2015088027A1 - 圧縮空気乾燥装置 - Google Patents
圧縮空気乾燥装置 Download PDFInfo
- Publication number
- WO2015088027A1 WO2015088027A1 PCT/JP2014/083047 JP2014083047W WO2015088027A1 WO 2015088027 A1 WO2015088027 A1 WO 2015088027A1 JP 2014083047 W JP2014083047 W JP 2014083047W WO 2015088027 A1 WO2015088027 A1 WO 2015088027A1
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- WO
- WIPO (PCT)
- Prior art keywords
- compressed air
- oil
- drying
- desiccant
- support base
- Prior art date
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Classifications
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- 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
-
- 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
- B01D53/0423—Beds in columns
-
- 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
- B01D53/261—Drying gases or vapours by adsorption
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- 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
- B01J20/28042—Shaped bodies; Monolithic structures
- B01J20/28045—Honeycomb or cellular structures; Solid foams or sponges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/28—Plant or installations without electricity supply, e.g. using electrets
- B03C3/30—Plant or installations without electricity supply, e.g. using electrets in which electrostatic charge is generated by passage of the gases, i.e. tribo-electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/16—Filtration; Moisture separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4566—Gas separation or purification devices adapted for specific applications for use in transportation means
-
- 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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/50—Aspects relating to the use of sorbent or filter aid materials
- B01J2220/62—In a cartridge
Definitions
- the present invention relates to a compressed air drying apparatus for drying compressed air supplied from a compressor.
- the compressed air drying device includes a support base, a drying container filled with a desiccant, and an outer case that covers the drying container and is attached to the support base.
- the support base is provided with an inlet through which compressed air supplied from the compressor flows, an outlet through which dry air is discharged, and a drain discharge port including a drain discharge device (see, for example, Patent Document 1).
- the compressed air drying device allows the compressed air flowing from the inlet to pass through the drying container, stores the compressed dry air in the outer case, and supplies the compressed dry air to the air tank from the outlet. . Also, the compressed air drying device opens the drain valve of the drain discharge device during unloading operation to regenerate the desiccant, thereby drying the compressed dry air accumulated in the outer case in the direction opposite to that during load operation. Water is discharged from the drain valve through the container. The compressed air drying device periodically repeats the load operation and the unload operation.
- the above-mentioned compressed air drying apparatus is provided with a filter element for removing oil (oil) and dust contained in the compressed air in addition to the drying container.
- An object of the present invention is to provide a compressed air drying apparatus capable of improving the removal rate of oil contained in compressed air.
- a compressed air drying apparatus that solves the above problems is attached to the support base, and includes a support base having an inlet for compressed air from the compressor, an outlet for compressed air, and an oil / water outlet having a drain valve device.
- a drying container a case that covers the drying container and is mounted on the support base, and a chargeable oil adsorbent that is accommodated between the drying container and the case.
- the drying container is filled with a desiccant.
- the compressed air drying device dries the compressed air that has flowed from the inlet during the load operation with the desiccant, stores the dried compressed air in the case, and discharges the dried compressed air from the outlet to perform an unload operation. Sometimes oil and moisture are discharged from the outlet by passing the dry container through compressed air in the case.
- the compressed air drying device includes a chargeable oil adsorbent housed between a drying container and a case. Since the chargeable oil adsorbent is charged, the oil mist contained in the compressed air is adsorbed. Therefore, oil including oil mist is removed from the compressed air. Therefore, the removal rate of oil contained in the compressed air can be improved.
- the said charging oil adsorption material is located upstream from the said desiccant in the flow of the compressed air at the time of the said load driving
- the charging oil adsorbent is positioned upstream of the desiccant in the flow path through which the compressed air during the load operation passes. That is, during the load operation, the charged oil adsorbent and the desiccant are so passed that the compressed air flowing in from the inlet passes through the chargeable oil adsorbent before passing through the desiccant. Has been placed.
- the oil component including the oil mist contained in the compressed air is removed by the chargeable oil adsorbent, and then the moisture contained in the compressed air is removed by the desiccant. For this reason, when the compressed air passes through the desiccant, the amount of oil contained in the compressed air is reduced, so that the desiccant adsorbs the oil to prevent the desiccant from adsorbing water. it can.
- the charging oil adsorbent is in contact with the drying container.
- the charging oil adsorbent is in contact with the drying container. That is, since there is no gap between the drying container and the chargeable oil adsorbent, the compressed air passes through the chargeable oil adsorbent. Therefore, the oil removal rate can be improved. Further, the position of the charging oil adsorbent can be fixed.
- the charging oil adsorbent is preferably a charging sponge.
- the chargeable oil adsorbent is a chargeable sponge. Since the charging sponge can be washed with a detergent, it can be reused.
- the removal rate of oil contained in compressed air can be improved.
- the front view which shows the external shape of a compressed air drying apparatus.
- the top view which shows the upper surface of the compressed air drying apparatus of FIG. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 1.
- the perspective view which shows the shape before the accommodation of the charging oil adsorption material accommodated in the inside of the compressed air drying device of FIG.
- the perspective view which shows the shape at the time of the accommodation of the charging oil adsorption material accommodated in the inside of the compressed air drying device of FIG.
- the compressed air drying apparatus includes a cylindrical purge tank 15 having a bottom and a support base 10 that supports the purge tank 15.
- the purge tank 15 is a cartridge type that can be attached to and detached from the support base 10.
- An inlet 11 into which compressed air supplied from a compressor (not shown) flows and an outlet 12 from which dried compressed air is discharged to an air tank (not shown) are provided in the side portion of the support base 10 in the same direction. It has been.
- the outlet 12 is provided with a flange 12 a for attaching the protection valve 60.
- the protection valve 60 is integrally provided with a plurality of pressure protection valves respectively corresponding to air tanks (brake circuits) (not shown). Therefore, the system including each air tank is independent. When the pressure of the compressed air in any one of the air tanks is reduced (defective), the protection valve 60 closes the pressure protection valve (not shown) corresponding to the air tank, so that other non-defective air tanks ( Functions to protect the brake circuit).
- the support base 10 is provided with a pressure governor 39.
- a drain discharge port 13 is provided as a discharge port for discharging oil and moisture during unloading operation.
- the outlet 12 is provided with a check valve (not shown). This check valve opens the outlet 12 during the load operation and closes the outlet 12 during the unload operation.
- a cylindrical inner cylindrical portion 21 is formed at the upper center of the support base 10.
- a male screw 21 a is formed on the upper outer periphery of the inner cylindrical portion 21.
- a cylindrical outer cylindrical portion 23 is formed on the upper outer edge portion of the support base 10.
- a space between the inner cylindrical portion 21 and the outer cylindrical portion 23 functions as a first tank 16 as a case for storing the compressed air flowing from the inlet 11.
- the drain discharge port 13 is provided with a drain valve device 50 that opens and closes the drain discharge port 13.
- An exhaust pipe 14 is exposed and attached to the drain discharge port 13.
- a space 22 is formed in the center of the support base 10.
- the pressure governor 39 can supply compressed air to the space 22 through the communication passage 29.
- the drain valve device 50 includes a valve body 51 for opening and closing the drain discharge port 13 and a piston 52 for moving the valve body 51.
- the valve body 51 is installed so as to move integrally with the piston 52 and to be seated on the valve seat 53 of the drain valve device 50.
- the piston 52 is installed in a state in which the space 22 formed in the support base 10 is closed, and is urged upward by the urging spring 54 (that is, toward the space 22).
- a cylindrical regulating piece 52 a is provided on the upper portion of the piston 52.
- the restricting piece 52 a is configured to be inserted into a cylindrical guide groove 22 a formed in the upper portion of the space 22.
- the piston 52 moves in a state where the restricting piece 52a is inserted into the guide groove 22a. For this reason, since the moving direction of the piston 52 is restricted, the tilting during the movement is suppressed.
- the piston 52 is pushed down when compressed air is supplied from the pressure governor 39 to the space 22.
- the valve body 51 is pushed down together with the piston 52, the valve body 51 is separated from the valve seat 53, whereby the drain discharge port 13 is opened.
- the piston 52 is pushed up by the biasing spring 54.
- the valve body 51 is pushed up together with the piston 52, the valve body 51 is seated on the valve seat 53 and the drain discharge port 13 is closed.
- the drain valve device 50 closes the drain outlet 13 during the load operation.
- compressed air is supplied from the pressure governor 39 to the space 22.
- the drain valve device 50 opens the drain outlet 13.
- the unload operation starts.
- the liquid containing oil and water is vigorously discharged to the outside from the open drain discharge port 13 by the compressed air (purge air) in the purge tank 15.
- the pressure in the purge tank 15 decreases due to the discharge of the compressed air from the drain discharge port 13 and reaches the minimum predetermined pressure, the supply of the compressed air to the space 22 is stopped and the piston 52 is not pushed down. Therefore, the drain discharge port 13 is closed by the biasing force of the biasing spring 54.
- the purge tank 15 has a cylindrical outer case 41 having a bottom portion and an opening that opens toward the support base 10, and a mounting plate 43 that is attached to the support base 10 while closing the opening of the outer case 41. And a fixing member 44 for fixing the mounting plate 43 to the outer case 41.
- a cylindrical drying container 30 filled with a desiccant 31 is accommodated inside the outer case 41. That is, the drying container 30 is covered with the outer case 41.
- the drying container 30 includes a large-diameter portion 30 a having an outer diameter substantially equal to the inner diameter of the outer case 41 and a small-diameter portion 30 b having an outer diameter that is about half the inner diameter of the outer case 41.
- the large diameter part 30a and the small diameter part 30b are connected by a connecting part 30c.
- the desiccant 31 is filled in the large diameter portion 30 a of the drying container 30.
- a cylindrical female screw portion 43b having a female screw 43a is provided at the center of the mounting plate 43.
- the female screw 43 a is screwed into the male screw 21 a of the inner cylindrical portion 21 of the support base 10.
- the purge tank 15 is attached to the support base 10 by screwing the female screw portion 43 b of the mounting plate 43 to the inner cylindrical portion 21.
- the mounting plate 43 is fixed to the fixing member 44 by winding the outer edge portion 44 a of the fixing member 44 around the opening end 41 a of the outer case 41.
- a sealing member 45 that is in close contact with the upper end portion 24 of the support base 10 to form a sealed space is attached to the lower portion of the fixing member 44.
- a through hole 43 c is formed in the mounting plate 43.
- the granular desiccant 31 filled in the drying container 30 is sandwiched between the upper plate 32 and the lower plate 33 in the vertical direction.
- a biasing spring 36 is installed inside the outer case 41.
- the urging spring 36 is installed in the spring receiving portion 32 a of the upper plate 32 and urges the upper plate 32 toward the lower plate 33.
- a plurality of through holes are formed in the upper plate 32 and the lower plate 33.
- An upper filter 34 is installed between the upper plate 32 and the desiccant 31.
- a lower filter 35 is installed between the desiccant 31 and the lower plate 33.
- a chargeable oil adsorbent 70 is accommodated. That is, the charging oil adsorbent 70 is a space surrounded by the outer peripheral surface of the connecting portion 30 c of the drying container 30, the outer peripheral surface of the small diameter portion 30 b, the inner peripheral surface of the outer case 41, and the upper surface of the mounting plate 43. S is stored.
- the chargeable oil adsorbent 70 is a chargeable sponge and is charged when dry air passes through it.
- the chargeable oil adsorbent 70 sucks oil mist contained in compressed air by electrostatic force. When the sucked oil collides with the charging oil adsorbent 70, the oil mist and oil are removed from the compressed air.
- As the chargeable oil adsorbent 70 for example, a material having heat resistance, moisture resistance, and oil resistance can be adopted.
- the chargeable sponge has excellent chemical resistance and can be reused after being washed with a detergent.
- the chargeable oil adsorbent 70 has a rectangular parallelepiped shape, and has both ends 71 and 72 cut off obliquely.
- the charging oil adsorbent 70 is stored in the space S in a state of being bent into an annular shape. Both end portions 71 and 72 of the charging oil adsorbent 70 are formed obliquely so that the outer peripheral portion of the ring is longer than the inner peripheral portion. Therefore, both end portions 71 and 72 of the charging oil adsorbing material 70 are easily brought into contact when bent into an annular shape in order to be stored in the space S.
- the charging oil adsorbent 70 when the charging oil adsorbent 70 is stored in the space S, the charging oil adsorbent 70 is placed on the outer peripheral surface of the connecting portion 30 c, the outer peripheral surface of the small diameter portion 30 b, and the inner peripheral surface of the outer case 41. Contact.
- the charging oil adsorbent 70 is located upstream of the desiccant 31 in the flow of compressed air during the load operation.
- the load operation starts when the pressure in the purge tank 15 reaches the minimum predetermined pressure, and ends when the pressure in the air tank reaches the maximum predetermined pressure.
- the inlet 11 and the outlet 12 are opened and the drain outlet 13 is closed.
- the unload operation starts when the pressure in the air tank reaches the maximum predetermined pressure, and ends when the pressure in the purge tank 15 reaches the minimum predetermined pressure.
- the inlet 11 and the outlet 12 are closed and the drain outlet 13 is opened.
- the compressed air that has flowed from the compressor through the inlet 11 flows into the first tank 16.
- the compressed air that has flowed into the first tank 16 flows into the space S from the through hole 43 c of the mounting plate 43 and passes through the charging oil adsorbent 70.
- oil and dust including oil mist are removed from the compressed air.
- the compressed air that has passed through the charging oil adsorbent 70 passes through the gap between the large-diameter portion 30 a of the drying container 30 and the outer case 41 from the bottom to the top and enters the drying container 30.
- the compressed air flowing into the drying container 30 passes through the through hole of the upper plate 32 and passes through the large-diameter portion 30 a filled with the desiccant 31.
- Moisture is removed from the compressed air by the desiccant 31, that is, the compressed air is dried.
- the dried compressed air passes through the through hole of the lower plate 33, flows into the inner cylindrical portion 21 of the support base 10, and is stored in the air tank through the outlet 12.
- the dry compressed air in the air tank is used for the operation of each device of the air brake system, for example.
- the pressure governor 39 supplies compressed air to the space 22.
- the drain valve device 50 pushes down the valve body 51 to open the drain discharge port 13. Therefore, the compressed air drying device shifts from the load operation to the unload operation.
- the drain discharge port 13 is opened by the drain valve device 50.
- the liquid containing the oil and moisture is expelled to the outside by the compressed air (purge air) in the purge tank 15.
- the dry compressed air accumulated in the purge tank 15 passes through the desiccant 31 to remove the moisture adsorbed on the desiccant 31, thereby regenerating the desiccant 31.
- the compressed air that has passed through the desiccant 31 passes through the gap between the large-diameter portion 30 a of the drying container 30 and the outer case 41 and passes through the charging oil adsorbent 70.
- the compressed air that has passed through the charging oil adsorbent 70 passes through the first tank 16, passes through the drain valve device 50, passes through the exhaust pipe 14, and is discharged to the outside together with oil and moisture.
- the discharge of purge air and oil moisture stops.
- the drain valve device 50 when the pressure in the purge tank 15 reaches the minimum predetermined pressure, the supply of compressed air from the pressure governor 39 is stopped, whereby air is discharged from the space 22, and the biasing force of the biasing spring 54 is As a result, the drain outlet 13 is closed. Therefore, the compressed air drying device shifts from the unload operation to the load operation.
- the compressed air drying device includes a chargeable oil adsorbing material 70 accommodated between the drying container 30 and the outer case 41. That is, since the chargeable oil adsorbent 70 is charged, the oil mist contained in the compressed air is adsorbed by the chargeable oil adsorbent 70. As a result, oil containing oil mist is removed from the compressed air. Therefore, the removal rate of oil contained in the compressed air can be improved.
- the charging oil adsorbent 70 is located upstream of the desiccant 31 in the flow of compressed air during the load operation. That is, the charging oil adsorbent 70 and the desiccant 31 are arranged so that the compressed air flowing from the inlet 11 passes through the charging oil adsorbent 70 before passing through the desiccant 31 during the load operation.
- the oil component including the oil mist contained in the compressed air is removed by the chargeable oil adsorbent 70, and then the moisture contained in the compressed air is removed by the desiccant 31.
- the chargeable oil adsorbent 70 is in contact with the drying container 30. That is, since there is no gap between the drying container 30 and the chargeable oil adsorbent 70, the compressed air passes through the chargeable oil adsorbent 70. Therefore, the oil removal rate can be improved. Further, the position of the charging oil adsorbent 70 can be fixed.
- the chargeable oil adsorbent 70 is a chargeable sponge. Since the charging sponge can be washed with a detergent, it can be reused. In addition, the said embodiment can also be implemented with the following forms which changed this suitably.
- a charging sponge is used as the charging oil adsorbent 70.
- other than the chargeable sponge may be adopted as the chargeable oil adsorbing material 70 as long as it can be charged and oil can be adsorbed.
- the chargeable oil adsorbent 70 is in contact with the drying container 30.
- the charging oil adsorbent 70 may be installed in the space S so that there is a slight gap between the charging oil adsorbent 70 and the drying container 30.
- the drying container 30 has the large diameter part 30a and the small diameter part 30b.
- the shape of the drying container is not limited to the above, and other shapes may be used as long as the drying agent 31 can be filled.
- the charging oil adsorbent 70 is accommodated between the inner peripheral surface of the outer case 41 and the outer peripheral surface of the drying container 30.
- the charging oil adsorbent 70 is located upstream of the desiccant 31 in the flow of compressed air during the load operation.
- the charged oil adsorbent 70 may be positioned downstream of the desiccant 31 in the flow of compressed air during the unload operation.
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Drying Of Gases (AREA)
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- Electrostatic Separation (AREA)
Abstract
Description
上記課題を解決する圧縮空気乾燥装置は、圧縮機からの圧縮空気の入口と、圧縮空気の出口と、ドレンバルブ装置を備える油水分の排出口とを有する支持ベースと、前記支持ベースに装着される乾燥容器と、前記乾燥容器を覆うとともに前記支持ベースに装着されるケースと、前記乾燥容器と前記ケースとの間に収納される帯電性オイル吸着材と、を備える。前記乾燥容器には乾燥剤が充填されている。前記圧縮空気乾燥装置は、ロード運転時には前記入口から流入した圧縮空気を前記乾燥剤によって乾燥し、乾燥した圧縮空気を前記ケースに溜めるとともに、乾燥した圧縮空気を前記出口から排出し、アンロード運転時には前記ケース内の圧縮空気に前記乾燥容器を通過させることによって、油水分を前記排出口から排出する。
この場合、帯電性オイル吸着材がロード運転時の圧縮空気が通過する流路において乾燥剤よりも上流に位置する。すなわち、前記ロード運転時において、前記入口から流入した圧縮空気が、前記乾燥剤を通過するより前に、前記帯電性オイル吸着材を通過するように、前記帯電性オイル吸着材及び前記乾燥剤が配置されている。まず帯電性オイル吸着材によって、圧縮空気に含まれるオイルミストを含む油分が除去され、続いて乾燥剤によって、圧縮空気に含まれる水分が除去される。このため、圧縮空気が乾燥剤を通過する際には、圧縮空気に含まれる油分の量が減っているので、乾燥剤が油分を吸着することによって乾燥剤の水分吸着性能が低下することを抑制できる。
この場合、帯電性オイル吸着材は乾燥容器に接触している。すなわち、乾燥容器と帯電性オイル吸着材との間に隙間がないので、圧縮空気は帯電性オイル吸着材の中を通過する。そのため、オイルの除去率を向上させることができる。また、帯電性オイル吸着材の位置を固定することができる。
この場合、帯電性オイル吸着材が帯電性スポンジである。帯電性スポンジは、洗剤による洗浄が可能であるので、再利用することができる。
図1及び図2に示されるように、圧縮空気乾燥装置は、底部を有する円筒形状のパージタンク15と、パージタンク15を支持する支持ベース10とを備えている。パージタンク15は、支持ベース10に対して着脱可能なカートリッジタイプである。
図3に示されるように、ロード運転は、パージタンク15内の圧力が最小所定圧力となった際に開始して、エアタンク内の圧力が最大所定圧力となった際に終了する。ロード運転時には、入口11と出口12とが開かれるとともに、ドレン排出口13が閉じられる。アンロード運転は、エアタンク内の圧力が最大所定圧力となった際に開始して、パージタンク15内の圧力が最小所定圧力となった際に終了する。アンロード運転時には、入口11と出口12とが閉じられるとともに、ドレン排出口13が開かれる。
(1)圧縮空気乾燥装置は、乾燥容器30と外側ケース41との間に収納される帯電性オイル吸着材70を備える。すなわち、帯電性オイル吸着材70が帯電しているので、圧縮空気に含まれるオイルミストが帯電性オイル吸着材70に吸着される。これによって、圧縮空気からオイルミストを含むオイルが除去される。よって、圧縮空気に含まれるオイルの除去率を向上させることができる。
なお、上記実施形態は、これを適宜変更した以下の形態にて実施することもできる。
Claims (4)
- 圧縮空気乾燥装置であって、
圧縮機からの圧縮空気の入口と、圧縮空気の出口と、ドレンバルブ装置を備える油水分の排出口とを有する支持ベースと、
前記支持ベースに装着される乾燥容器と、
前記乾燥容器を覆うとともに前記支持ベースに装着されるケースと、
前記乾燥容器と前記ケースとの間に収納される帯電性オイル吸着材と、を備え、
前記乾燥容器には乾燥剤が充填されており、
前記圧縮空気乾燥装置は、
ロード運転時には前記入口から流入した圧縮空気を前記乾燥剤によって乾燥し、乾燥した圧縮空気を前記ケースに溜めるとともに、乾燥した圧縮空気を前記出口から排出し、
アンロード運転時には前記ケース内の圧縮空気に前記乾燥容器を通過させることによって、油水分を前記排出口から排出する、圧縮空気乾燥装置。 - 前記帯電性オイル吸着材は、前記ロード運転時の圧縮空気の流れにおいて、前記乾燥剤よりも上流に位置する
請求項1に記載の圧縮空気乾燥装置。 - 前記帯電性オイル吸着材は、前記乾燥容器に接触している
請求項1又は2に記載の圧縮空気乾燥装置。 - 前記帯電性オイル吸着材は、帯電性スポンジである
請求項1~3のいずれか一項に記載の圧縮空気乾燥装置。
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US15/103,046 US10105634B2 (en) | 2013-12-12 | 2014-12-12 | Compressed air-drying device |
JP2015552550A JPWO2015088027A1 (ja) | 2013-12-12 | 2014-12-12 | 圧縮空気乾燥装置 |
CN201480067444.5A CN105980034A (zh) | 2013-12-12 | 2014-12-12 | 压缩空气干燥装置 |
DE112014005632.4T DE112014005632T5 (de) | 2013-12-12 | 2014-12-12 | Drucklufttrocknungsvorrichtung |
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