CA1099095A - Dual-chamber heatless dryer with high-speed dumping - Google Patents
Dual-chamber heatless dryer with high-speed dumpingInfo
- Publication number
- CA1099095A CA1099095A CA334,827A CA334827A CA1099095A CA 1099095 A CA1099095 A CA 1099095A CA 334827 A CA334827 A CA 334827A CA 1099095 A CA1099095 A CA 1099095A
- Authority
- CA
- Canada
- Prior art keywords
- chamber
- chambers
- gas
- valve
- dual
- 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.)
- Expired
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
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/083—Humidity by using sorbent or hygroscopic materials, e.g. chemical substances, molecular sieves
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Gases (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The invention is concerned with a dual-chamber dryer system and a process for the rapid regeneration of desiccant in pressurized dryer chambers. Two dryer chambers are provided and the pressurized gas is con-nected thereto through a solenoid valve which permits super-high speed evacuation of one of the chambers when the valve is shifted to connect the pressurized gas to the other of the chambers. A timer is connected to the valve and, at predetermined time intervals, will evacuate the chamber being used and connect the gas to the other of the chambers. The evacuated gas carries substantially all of the moisture present at the bottom of the chamber and in the desiccant.
The invention is concerned with a dual-chamber dryer system and a process for the rapid regeneration of desiccant in pressurized dryer chambers. Two dryer chambers are provided and the pressurized gas is con-nected thereto through a solenoid valve which permits super-high speed evacuation of one of the chambers when the valve is shifted to connect the pressurized gas to the other of the chambers. A timer is connected to the valve and, at predetermined time intervals, will evacuate the chamber being used and connect the gas to the other of the chambers. The evacuated gas carries substantially all of the moisture present at the bottom of the chamber and in the desiccant.
Description
~:)q~5 BACKGROU~D OF INVE~TIO~
(a) Field of the Invention The present invention relates to a dual-chamber heatless dryer system having super-high speed regeneration.
(b) Description of Prior Art In most heatless dryer systems utilizing two dryer chambers, the regeneration of the inactive chamber is achieved by taking some of the air from the active chamber and feeding it backwards from the top to the bottom of the inactive chamber. This very dry air from the active chamber dries out the chemical in the chamber previously used. A disadvantage of this type of system is that air is lost when using it in the regeneration process. In some systems, this may amount to up to I5%
of the compressor capacity, and for this reason, this type of heatless dryer system is very inefficient.
SUMMARY OF INVE~TION
It is a feature of the present invention to overcome the above-mentioned disadvantage existing with dual-chamber systems.
A further feature of the present invention is to provide a dual-chamber dryer system which regenerates the chamber very quickly by evacuating the air therein at super-high speed.
According to the above features, from a broad aspect, the present invention provides a dual-chamber heatless dryer system comprising a first and a second drying chamber each containing a desiccant. Each chamber has an inlet and outlet connection for the passage of a 10~ 95 gas stream through the chamber. A dumping valve is also provided and has a housing with an inlet to receive a pressurized gas. The housing has two outlets each con-nected to a respective one of the inlet connections of the drying chambers. The valve housing has a dumping port for evacuating gas from the drying chambers. A
spool is displaceable within the housing and has passage-ways therein to connect the inlet to one of the outlets and the other of the outlets to the dumping port when the spool is in a first displaced position and reversing the connections when the spool is in a second displaced posi-tion. The passageway which connects the outletsto the dumping port is sufficiently large to permit one of the chambers to evacuate at super-high speed whereby evacu-ated gas will carry substantially all of the moisture present in the chamber.
According to a further broad aspect of the present invention, there is provided a process for rapid regeneration of desiccant in pressurized dryer chambers.
The process comprises the steps of providing two dryer chambers each having a desiccant therein for the removal of moisture from the pressurized gas passing therethrough.
The pressurized gas is passed through one of the chambers and the other of the chambers is evacuated at super-high speed whereby the evacuated gas will carry substantially all of the moisture present in the other of the chambers and including that in the desiccant therein.
BRIEF DESCRIPTIO~ OF DRAWI~GS
A preferred embodiment of the present invention will now be described with reference to the accompanying ~9~5 drawings in which:
FIGURE 1 is a front view of an installation of the system, and FIGUR~ 2 is a schematic view of the dual-chamber dryer system of the present invention.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring now to the drawings, there is shown generally at 10, the dual-chamber heatless dryer system of the present invention. The system comprises a first and a second drying chamber 11 and 12 each having a desiccant cartridge (not shown) therein to extract moisture from the pressurized gas, herein pressurized air, passing therethrough. Each chamber has an inlet connection 11' and 12' and an outlet connection 11" and 12", whereby a gas stream may pass through the respec-tive chambers. A dumping valve 13 is connected to the inlets 11' and 12' of both chambers~
The dumping valve 13 comprises a housing 14 having a displaceable spool therein, herein schematically illustrated at 15. The spool 15 connects an inlet 16 of the chamber to which a source of supply air is connected to either one of two outlets 17 and 18. As herein shown, outlet 17 connects to inlet 11' of the chamber 11 and out-let 18 connects to the inlet connection 12' of the second chamber 12.
The dumping valve chamber 14 is also provided with a single dumping port 19 as shown in Figure 1. How-ever, for purpose of illustration, this port is schema-tically illustrated in Figure 2 by outlet sections 19' and 19" to facilitate the understanding and description i~99q~5 of this valve.
A solenoid 20, herein schematically illustrated, operates the displaceable spool 15 to displace it from its position, as shown in solid line in Figure 2, to direct air to the inlet connection 11' of the first chamber 11, to the position 21 as shown in phantom line to direct inlet air to the second chamber 12. The sole-noid valve 13 is well known in the art and is selected to give a super-high speed evacuation of one of the chambers 11 and 12 when the spool is shifted from one chamber to the other chamber. Thus, the dumping port 19 and the spool 15 have very large openings which per-mits the evacuation of the air in the pressurized chamber within 100 milliseconds. This "quick dumping" of the air in the chamber just being used will carry almost 100%
of the moisture that is contained in the bottom of the chamber and in the desiccant or other chemical contained therein. A bleed air inlet (not shown) is provided in each of the chambers for the purpose of preventing atmos-pheric moisture from getting back into the chamber while it is not active. This bleed air amount to less than 1 cubic foot per minute in all sizes of chamber and is not a factor in this invention.
The dumping valve 13 is of Model No. 1250-4El manufactured by Humphrey Products and has a capacity of 875 cfm at 125 psi.
It can be seen that the outlet connections 11"
and 12" of chambers 11 and 12 are connected to passage-ways 25 and 26, respectively, which each connects to a common outlet passageway 27 to supply pressurized air 1C~99~95 which is substantially free of moisture. A check valve 28 and 29 is secured in a respective one of the passage-ways 25 and 26 whereby to prevent pressurized air from being fed back in the evacuated chamber and to permit the passage of air from the chamber being used to the outlet passageway 27.
Summarizing the operation, there is provided a process for the rapid generation of desiccant in pressurized dryer chambers and this is achieved by pro- -viding two chambers 11 and 12 and passing pressurized air through one of them and evacuating the other chamber at super-high speed whereby to substantially remove all the moisture present in the evacuated chamber. This is achieved by providing a solenoid valve with sufficiently large ports therein to permit this super-high speed evacuation. In order to dampen the noise caused by this super-high speed evacuation, a muffler 28 is secured to the dumping port 19. As schematically illustrated in Figure 2, the supply of air is being fed to the inlet connection 11' of chamber 11 while the inlet connection 12' of chamber 12 is connected to the dumping port 19"
directly through the valve 13. Thus, the chamber 11 is active while the chamber 12 is inactive. After a pre-determined time period, in this application ten minutes t the timer 22 sends a signal to the solenoid valve and this signa~ causes the displaceable spool 15 to return to its initial position, as illustrated by phantom line 21, under the action of a spring (not shown). At that instant, the chamber 11 is evacuated and the pressurized gas is directed to the second chamber 12 where removal ~99V95 of moisture from the gas takes place.
As shown in Figure 1, a separator 30 is con-nected in the inlet air supply 31 and it separates the drops of liquid from the gas. A liquid outlet 32 is provided to remove the liquid from the separator. A gas outlet 33 connects the gas to the inlet 16 of the valve 13. Various pressure gauges 34 are provided to monitor the inlet and outlet pressures.
It is within the ambit of the present invention to cover any obvious modifications thereof provided such modifications fall within the scope of the appended claims.
(a) Field of the Invention The present invention relates to a dual-chamber heatless dryer system having super-high speed regeneration.
(b) Description of Prior Art In most heatless dryer systems utilizing two dryer chambers, the regeneration of the inactive chamber is achieved by taking some of the air from the active chamber and feeding it backwards from the top to the bottom of the inactive chamber. This very dry air from the active chamber dries out the chemical in the chamber previously used. A disadvantage of this type of system is that air is lost when using it in the regeneration process. In some systems, this may amount to up to I5%
of the compressor capacity, and for this reason, this type of heatless dryer system is very inefficient.
SUMMARY OF INVE~TION
It is a feature of the present invention to overcome the above-mentioned disadvantage existing with dual-chamber systems.
A further feature of the present invention is to provide a dual-chamber dryer system which regenerates the chamber very quickly by evacuating the air therein at super-high speed.
According to the above features, from a broad aspect, the present invention provides a dual-chamber heatless dryer system comprising a first and a second drying chamber each containing a desiccant. Each chamber has an inlet and outlet connection for the passage of a 10~ 95 gas stream through the chamber. A dumping valve is also provided and has a housing with an inlet to receive a pressurized gas. The housing has two outlets each con-nected to a respective one of the inlet connections of the drying chambers. The valve housing has a dumping port for evacuating gas from the drying chambers. A
spool is displaceable within the housing and has passage-ways therein to connect the inlet to one of the outlets and the other of the outlets to the dumping port when the spool is in a first displaced position and reversing the connections when the spool is in a second displaced posi-tion. The passageway which connects the outletsto the dumping port is sufficiently large to permit one of the chambers to evacuate at super-high speed whereby evacu-ated gas will carry substantially all of the moisture present in the chamber.
According to a further broad aspect of the present invention, there is provided a process for rapid regeneration of desiccant in pressurized dryer chambers.
The process comprises the steps of providing two dryer chambers each having a desiccant therein for the removal of moisture from the pressurized gas passing therethrough.
The pressurized gas is passed through one of the chambers and the other of the chambers is evacuated at super-high speed whereby the evacuated gas will carry substantially all of the moisture present in the other of the chambers and including that in the desiccant therein.
BRIEF DESCRIPTIO~ OF DRAWI~GS
A preferred embodiment of the present invention will now be described with reference to the accompanying ~9~5 drawings in which:
FIGURE 1 is a front view of an installation of the system, and FIGUR~ 2 is a schematic view of the dual-chamber dryer system of the present invention.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring now to the drawings, there is shown generally at 10, the dual-chamber heatless dryer system of the present invention. The system comprises a first and a second drying chamber 11 and 12 each having a desiccant cartridge (not shown) therein to extract moisture from the pressurized gas, herein pressurized air, passing therethrough. Each chamber has an inlet connection 11' and 12' and an outlet connection 11" and 12", whereby a gas stream may pass through the respec-tive chambers. A dumping valve 13 is connected to the inlets 11' and 12' of both chambers~
The dumping valve 13 comprises a housing 14 having a displaceable spool therein, herein schematically illustrated at 15. The spool 15 connects an inlet 16 of the chamber to which a source of supply air is connected to either one of two outlets 17 and 18. As herein shown, outlet 17 connects to inlet 11' of the chamber 11 and out-let 18 connects to the inlet connection 12' of the second chamber 12.
The dumping valve chamber 14 is also provided with a single dumping port 19 as shown in Figure 1. How-ever, for purpose of illustration, this port is schema-tically illustrated in Figure 2 by outlet sections 19' and 19" to facilitate the understanding and description i~99q~5 of this valve.
A solenoid 20, herein schematically illustrated, operates the displaceable spool 15 to displace it from its position, as shown in solid line in Figure 2, to direct air to the inlet connection 11' of the first chamber 11, to the position 21 as shown in phantom line to direct inlet air to the second chamber 12. The sole-noid valve 13 is well known in the art and is selected to give a super-high speed evacuation of one of the chambers 11 and 12 when the spool is shifted from one chamber to the other chamber. Thus, the dumping port 19 and the spool 15 have very large openings which per-mits the evacuation of the air in the pressurized chamber within 100 milliseconds. This "quick dumping" of the air in the chamber just being used will carry almost 100%
of the moisture that is contained in the bottom of the chamber and in the desiccant or other chemical contained therein. A bleed air inlet (not shown) is provided in each of the chambers for the purpose of preventing atmos-pheric moisture from getting back into the chamber while it is not active. This bleed air amount to less than 1 cubic foot per minute in all sizes of chamber and is not a factor in this invention.
The dumping valve 13 is of Model No. 1250-4El manufactured by Humphrey Products and has a capacity of 875 cfm at 125 psi.
It can be seen that the outlet connections 11"
and 12" of chambers 11 and 12 are connected to passage-ways 25 and 26, respectively, which each connects to a common outlet passageway 27 to supply pressurized air 1C~99~95 which is substantially free of moisture. A check valve 28 and 29 is secured in a respective one of the passage-ways 25 and 26 whereby to prevent pressurized air from being fed back in the evacuated chamber and to permit the passage of air from the chamber being used to the outlet passageway 27.
Summarizing the operation, there is provided a process for the rapid generation of desiccant in pressurized dryer chambers and this is achieved by pro- -viding two chambers 11 and 12 and passing pressurized air through one of them and evacuating the other chamber at super-high speed whereby to substantially remove all the moisture present in the evacuated chamber. This is achieved by providing a solenoid valve with sufficiently large ports therein to permit this super-high speed evacuation. In order to dampen the noise caused by this super-high speed evacuation, a muffler 28 is secured to the dumping port 19. As schematically illustrated in Figure 2, the supply of air is being fed to the inlet connection 11' of chamber 11 while the inlet connection 12' of chamber 12 is connected to the dumping port 19"
directly through the valve 13. Thus, the chamber 11 is active while the chamber 12 is inactive. After a pre-determined time period, in this application ten minutes t the timer 22 sends a signal to the solenoid valve and this signa~ causes the displaceable spool 15 to return to its initial position, as illustrated by phantom line 21, under the action of a spring (not shown). At that instant, the chamber 11 is evacuated and the pressurized gas is directed to the second chamber 12 where removal ~99V95 of moisture from the gas takes place.
As shown in Figure 1, a separator 30 is con-nected in the inlet air supply 31 and it separates the drops of liquid from the gas. A liquid outlet 32 is provided to remove the liquid from the separator. A gas outlet 33 connects the gas to the inlet 16 of the valve 13. Various pressure gauges 34 are provided to monitor the inlet and outlet pressures.
It is within the ambit of the present invention to cover any obvious modifications thereof provided such modifications fall within the scope of the appended claims.
Claims (9)
1. A dual-chamber heatless dryer system comprising a first and second drying chamber each containing a desic-cant, each chamber having an inlet and outlet connection for the passage of a gas stream through said chamber, a dumping valve having a housing with an inlet to receive a pressurized gas, said housing having two outlets each connected to a respective one of said inlet connections of said drying chambers, said valve housing having a dumping port for evacuating gas from said drying chambers, a spool displaceable within said housing and having passage-ways therein to connect said inlet to one of said outlets and the other of said outlets to said dumping port when said spool is in a first displaced position and reversing said connections when in a second displaced position, said passageway connecting said outlets to said dumping port being sufficiently large to permit one of said chambers to evacuate at super-high speed whereby evacuated gas will carry substantially all the moisture present in said chamber.
2. A dual-chamber dryer system as claimed in claim 1 wherein said evacuation takes place within 100 milli-seconds.
3. A dual-chamber dryer system as claimed in claim 2 wherein said valve is a solenoid valve, a timer connec-ted to a solenoid of said valve to cause said spool to be displaced from said first to said second position and back to said first position at predetermined intervals to activate one of said chambers and evacuate the other at each predetermined interval.
4. A dual-chamber dryer system as claimed in claim 3 wherein a check valve is connected in a passageway at said outlet connection of each said chambers to permit said gas to flow in an outward direction only from said chambers.
5. A dual-chamber dryer system as claimed in claim 3 wherein a muffler is connected to said dumping port of said valve housing to muffle the sound of the evacuating gas.
6. A dual-chamber dryer system as claimed in claim 2 wherein said valve has a capacity of 875 cfm at 125 psi.
7. A process for rapid regeneration of desiccant in pressurized dryer chambers, said process comprising the steps of:
(i) providing two dryer chambers each having a desiccant therein for the removal of mois-ture from a pressurized gas passing there-through, (ii) passing pressurized gas through one of said chambers and evacuating pressurized gas from the other of said chambers at super-high speed whereby said evacuated gas will carry substantially all moisture present in said other of said chambers including that in the desiccant therein.
(i) providing two dryer chambers each having a desiccant therein for the removal of mois-ture from a pressurized gas passing there-through, (ii) passing pressurized gas through one of said chambers and evacuating pressurized gas from the other of said chambers at super-high speed whereby said evacuated gas will carry substantially all moisture present in said other of said chambers including that in the desiccant therein.
8. A process as claimed in claim 7 wherein there is provided a solenoid valve to direct pressurized gas from a source to one of said chambers, said step (ii) comprising:
(a) shifting a spool of said solenoid valve at predetermined intervals to alternate the flow of said gas from one chamber to the other while evacua-ting the alternate chamber.
(a) shifting a spool of said solenoid valve at predetermined intervals to alternate the flow of said gas from one chamber to the other while evacua-ting the alternate chamber.
9. A process as claimed in claim 8 wherein said evacuating is effected within one millisecond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA334,827A CA1099095A (en) | 1979-08-30 | 1979-08-30 | Dual-chamber heatless dryer with high-speed dumping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA334,827A CA1099095A (en) | 1979-08-30 | 1979-08-30 | Dual-chamber heatless dryer with high-speed dumping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1099095A true CA1099095A (en) | 1981-04-14 |
Family
ID=4115052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA334,827A Expired CA1099095A (en) | 1979-08-30 | 1979-08-30 | Dual-chamber heatless dryer with high-speed dumping |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1099095A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107485984A (en) * | 2017-09-19 | 2017-12-19 | 珠海市思卡净化技术有限公司 | A kind of bilateral interlocks end face seal absorption drier |
-
1979
- 1979-08-30 CA CA334,827A patent/CA1099095A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107485984A (en) * | 2017-09-19 | 2017-12-19 | 珠海市思卡净化技术有限公司 | A kind of bilateral interlocks end face seal absorption drier |
| CN107485984B (en) * | 2017-09-19 | 2023-09-26 | 珠海市思卡净化技术有限公司 | Bilateral interlocking end face sealing adsorption type dryer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |