EP4774050A1 - Drying device for compressed gas, compressor installation provided with drying device and method used thereby - Google Patents

Drying device for compressed gas, compressor installation provided with drying device and method used thereby

Info

Publication number
EP4774050A1
EP4774050A1 EP24777298.1A EP24777298A EP4774050A1 EP 4774050 A1 EP4774050 A1 EP 4774050A1 EP 24777298 A EP24777298 A EP 24777298A EP 4774050 A1 EP4774050 A1 EP 4774050A1
Authority
EP
European Patent Office
Prior art keywords
drying
regeneration
chiller
section
cooler
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.)
Pending
Application number
EP24777298.1A
Other languages
German (de)
French (fr)
Inventor
Marc Gimenez Avalos
Geert HELLEMANS
Benny LEIECKENS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlas Copco Airpower NV
Original Assignee
Atlas Copco Airpower NV
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
Application filed by Atlas Copco Airpower NV filed Critical Atlas Copco Airpower NV
Publication of EP4774050A1 publication Critical patent/EP4774050A1/en
Pending legal-status Critical Current

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
    • 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
    • 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
    • B01D53/06—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 moving adsorbents, e.g. rotating beds
    • 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
    • B01D53/265—Drying gases or vapours by refrigeration (condensation)
    • 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
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • 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
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40007—Controlling pressure or temperature swing adsorption
    • B01D2259/40009—Controlling pressure or temperature swing adsorption using sensors or gas analysers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Drying Of Gases (AREA)
  • Compressor (AREA)

Abstract

Drying device for drying compressed gas, comprising a dryer (4) provided with a drying agent (5) and which is provided with a drying section (6) with an inlet (11) and an outlet (12) and with a regeneration section (7) with an inlet (13) and an outlet (14) for a regeneration gas, wherein a regeneration line (15) is connected to the inlet (13), wherein a branch line (17) is provided at the outlet (12) which connects to the regeneration line (15), wherein a pressure line (10) is connected to the inlet (ID of the drying section (6), wherein a cooler (18) and cooler (19) are incorporated, characterized in that the cooler (18) is cooled by means of a fan (20) and the cooler (19) by means of a chiller (21), wherein the fan (20) is controlled, based on a calculated temperature T1 at the inlet (ID when the chiller (21) is switched off and wherein the chiller (21) is controlled, based on the actual temperature T2 at the inlet (11).

Description

Drying device for compressed gas , compressor installation provided with drying device and method used thereby .
The present invention relates to a drying device .
More specifically, the invention is intended for drying compressed gas .
Drying devices for compressed gas are already known . These drying devices or dryers are provided with a vessel with a drying zone and a regeneration zone and a cooling zone , and a drum rotatable in the vessel with a regenerable drying agent or desiccant .
The vessel comprises an inlet for the supply of compressed gas to be dried and an outlet for dried compressed gas .
The regeneration section comprises an inlet and an outlet for regeneration gas for the regeneration of the drying agent . The drying device further comprises drive means for rotating the drum in such a way that the drying agent is successively moved through the drying section and regeneration section .
Usually, a regeneration line is connected to the inlet of said regeneration section, wherein a heat exchanger is incorporated into the regeneration line , optionally if necessary, for heating the regeneration gas .
The outlet of the drying section is classically provided with a branch line that connects to the regeneration line for branching off regeneration gas at the outlet of the drying section .
A pressure line is connected to the inlet of the drying section, in which a first cooler and a second cooler are successively incorporated .
The coolers of the known drying devices are cooled with air that is forced over or through the coolers with by means of fans or are cooled with a cooling medium, for example a cooled water circuit .
A disadvantage of the air-cooled coolers in such drying devices is that the cooling capacity is often insufficient and therefore cannot be used in areas with a higher ambient temperature .
Another disadvantage is that the energy consumption of such known drying devices is high .
The present invention aims to provide a solution to at least one of said and other disadvantages .
To this end, the invention relates to a drying device for drying compressed gas , comprising a dryer provided with a drying agent or desiccant and which is provided with a drying section with an inlet for compressed gas to be dried and an outlet for dried compressed gas , and with a regeneration section with an inlet and an outlet for a regeneration gas , wherein a regeneration line is connected to the inlet of the regeneration section, wherein a branch line is provided at the outlet of the drying section, which connects to the regeneration line for branching off regeneration gas at the outlet of the drying section, wherein a pressure line is connected to the inlet of the drying section, wherein a first cooler and a second cooler are successively incorporated, characterized in that the first cooler is cooled by means of a fan with adjustable speed and the second cooler by means of a chiller, wherein the fan is controlled, based on a calculated temperature T1 of the gas at the inlet of the drying section when the chiller is switched off and wherein the chiller is controlled, based on the actual temperature T2 of the compressed gas at the inlet of the drying section .
The controller according to the invention combines a controller for the fan and a controller for the chiller, which together ensure an optimal and energy-efficient cooling of the drying device .
Controlling the fan based on the calculated temperature T1 and controlling the chiller based on the actual temperature T2 ensures that the chiller is only switched on when the cooling capacity of the first cooler with fan is insufficient , without affecting the performance of the drying device .
By only switching on the chiller when the cooling capacity of the first cooler with fan is insufficient , energy is saved .
The increased cooling capacity, which is only switched on when necessary, ensures that the target performance is achieved for the entire operating area .
The invention also relates to a method for drying a compressed gas using a drying device comprising a dryer provided with a drying agent or desiccant and which is provided with a drying section with an inlet for compressed gas to be dried and an outlet for dried compressed gas , and with a regeneration section with an inlet and an outlet for a regeneration gas , wherein a regeneration line is connected to the inlet of the regeneration section, wherein a branch line is provided at the outlet of the drying section, which connects to the regeneration line for branching off regeneration gas at the outlet of the drying section, wherein a pressure line is connected to the inlet of the drying section, wherein a first cooler and a second cooler are successively incorporated, wherein the first cooler is cooled by means of a fan with adj ustable speed and the second cooler by means of a chiller, wherein the method comprises the following steps : a ) controlling the fan based on the calculated temperature T1 of the gas at the inlet of the drying section when the chiller is switched off ; b ) controlling the chiller based on the actual temperature T2 of the compressed gas at the inlet of the drying section .
According to a preferred aspect of the invention, the method also comprises the following sub-steps : al ) switching on the fan when the drying device is switched on; a2 ) increasing the speed of the fan as T1 increases ; and that step b comprises the following sub-steps : bl ) switching on the chiller when T2 is higher than a threshold value T2 max; b2 ) controlling the cooling capacity of the chiller such that T2 remains equal to the threshold value T2 max .
Preferably, in the method, the chiller is switched on when T2 is higher than a threshold value T2 max and when the fan runs at its maximum speed . In a preferred embodiment of the method, the controller will switch off the chiller when T2 falls below T2 max , wherein the control will reduce the speed of the fan when T1 is lower than T2 max , reduced by a specific value . With the aim of better demonstrating the features of the invention, a preferred embodiment of a drying device and compressor installation according to the invention and a method used therein are described below, as an example without any limiting character, with reference to the accompa- nying drawings , in which :
Figure 1 schematically represents a compressor installation with a drying device according to the invention; Figure 2 shows a graph that schematically represents the method according to the invention .
The compressor installation 1 , shown schematically in Figure 1 , comprises a compressor 2 and a drying device 3 , which drying device 3 comprises a dryer 4 provided with a drying agent 5 or desiccant . This dryer 4 is provided with a drying section 6 and a regeneration section 7 . In this case , the compressor 2 is a two-stage compressor with intercooler 8 , but the invention is not limited thereto .
A pressure line 10 is connected to the outlet 9 of the compressor 2 .
The drying section 6 is provided with an inlet 11 for compressed gas to be dried and an outlet 12 for dried compressed gas .
The regeneration section 7 is provided with an inlet 13 and an outlet 14 for regeneration gas , wherein a regeneration line 15 is connected to the inlet of the regeneration section 13 .
In this regeneration line 15 , in this case but not necessarily, a heat exchanger 16 is provided for heating the regeneration gas .
In this example , the heat exchanger 16 uses heat of compression of the compressed gas to be dried to heat the regeneration gas . Indeed, the heat exchanger 16 is also incorporated into said pressure line 10 .
The outlet 12 of the drying section 6 is provided with a branch line 17 that connects to the regeneration line 15 for branching off regeneration gas to the outlet 12 of the drying section 6.
Said pressure line 10 is connected to the inlet 11 of the drying section 6 , in which a first cooler 18 and a second cooler 19 are successively incorporated . Said heat exchanger 16 is incorporated in the pressure line 10 , upstream of the first cooler 18 .
Successive here means in the direction of flow of the compressed gas .
The first cooler 18 is cooled by means of a fan 20 with adj ustable speed while the second cooler 19 is cooled by means of a chiller 21 with, in this case , a cooled water circuit 22 .
However , it is not excluded that the first cooler 18 is cooled with the chiller 21 and the second cooler 19 is cooled with by means of said fan 20 .
Said chiller 21 can be part of the drying device 3 or of the compressor installation 1 or, alternatively, can be located outside , which can have a positive influence on the efficiency .
In the embodiment shown, a return line 23 is connected to the outlet 14 of the regeneration section 7 , which connects the outlet 14 of the regeneration section 7 with a point of the pressure line 10 , downstream of the second cooler 19 .
In this case , the return line 23 is connected to the pressure line 10 by means of a venturi 24 .
In said return line 23 , in this example , a third cooler 25 is provided . In this case , the third cooler 25 is also cooled by said fan 20 .
However , it is not excluded that this third cooler 25 is cooled by a separate fan 20 .
In this example , the return line 23 is also provided with a liquid separator 26 for discharging condensate , originating from the first cooler 18 and the second cooler 19 . However, the position of this liquid separator 26 is not fixed and one or more liquid separators 26 may also be installed elsewhere in the drying device 3 .
In this example , the drying device 3 is provided with a housing 27 within which the drying section 6 and the regeneration section 7 are located .
In this housing 27 , a drum 28 is arranged which contains the drying agent 5 or desiccant . This drum 28 is connected to drive means such that the drying means 5 is successively advanced through the drying section 6 and the regeneration section 7 .
Alternatively, the dryer 4 can comprise a number of vessels , filled with the drying agent 5 , of which at least one vessel forms the drying section 6 and at least one vessel forms the regeneration section 7 .
In that case , such a dryer 4 comprises a valve system that connects the outlet 12 , the regeneration line 15 and optionally the return line 23 and the branch line 17 with said vessels .
Said valve system is then configured in such a way that at least one vessel is always regenerated, while the other vessels dry the compressed gas . Controlling the valve system will regenerate the vessels each in turn .
According to the invention, the fan 20 is controlled, based on a calculated temperature T1 of the gas at the inlet 11 of the drying section 6 when the chiller 21 is switched off . However , the chiller 21 is controlled, based on the actual temperature T2 of the compressed gas at the inlet 11 of the drying section 6 . This temperature T2 is measured, for example , with a sensor provided for this purpose at the inlet 11 .
In this example , the drying device 3 is provided with a controller 29 for the fan 20 and the chiller 21 . This controller 29 will control the fan 20 based on T1 .
The chiller 21 is controlled, based on T2 and is switched on when T2 is higher than a threshold value T2 max . The cooling capacity of the chiller 21 is chosen such that T2 remains equal to the threshold value T2 max .
In this example , the controller 29 will switch off the chiller 21 when T2 falls below T2 max and the speed of the fan 20 will reduce when T1 is lower than T2 max, reduced by a specific value .
The operation of the drying device 3 is very simple and is illustrated by an example graph, such as shown in Figure 2.
This graph shows the time (in hours) as an independent variable and the temperature and load of the chiller LC and fan speed LF (in % of the maximum) as dependent variables.
The Tamb displays the variation of the ambient temperature as a function of time.
At 04:00, the compressor system 1 is started, wherein the controller 29 switches on the fan. In this example, the speed of fan 20 is initially set to 6 % of the maximum.
The speed of fan 20 is increased as T1 increases. At around 11:45, T2 becomes higher than T2 max. Since, at this time, the fan 20 is running at its maximum speed, the controller 29 controls the chiller 21.
The cooling capacity of the chiller 21 is controlled such that T2 remains equal to the threshold value T2 max and is therefore no longer dependent on Tamb.
However, the calculated value T1 continues to increase as if the chiller 21 was not present.
After 16:00, Tamb decreases again, from that time on the cooling capacity of chiller 21 decreases again while T2 remains equal to T2 max.
Around 20:00, T2 drops again below T2 max. The chiller 21 is therefore switched off while the fan 20 continues to run at its maximum speed for more than half an hour longer . Alternatively, the fan 20 can also be switched off immediately .
Only when T1 falls below T2 max, reduced by a specific value , is the speed of fan 20 also reduced .
Since Tamb and therefore also T1 continue to decrease , the speed of fan 20 is also further reduced .
Although the example shown describes a compressor installation 1 , it cannot be ruled out that the drying device 3 and the compressor 2 are not part of one and the same installation 1 .
It is clear to the s killed person that the first cooler 18 and third cooler 25 can also be replaced by one process cooler, which, in that case , is located downstream of the venturi 24 and is followed by the second cooler 19 .
Although three coolers 18 , 19 , 25 are shown in this example , the number of coolers is unlimited in practice .
The present invention is by no means limited to the embodiment , described as an example and shown in the figures , but a compressor installation, drying device and method used according to the invention can be realized in all shapes and dimensions without departing from the scope of the invention .

Claims

Claims
1.- Drying device for drying compressed gas, comprising a dryer (4) provided with a drying agent (5) or desiccant and which is provided with a drying section (6) with an inlet (11) for compressed gas to be dried and an outlet (12) for dried compressed gas, and with a regeneration section (7) with an inlet (13) and an outlet (14) for a regeneration gas, wherein a regeneration line (15) is connected to the inlet (13) of the regeneration section (7) , wherein a branch line (17) is provided at the outlet (12) of the drying section (6) , which connects to the regeneration line (15) for branching off regeneration gas at the outlet (12) of the drying section (6) , wherein a pressure line (10) is connected to the inlet (11) of the drying section (6) , wherein a first cooler (18) and a second cooler (19) are successively incorporated, characterized in that the first cooler (18) is cooled by means of a fan (20) with adjustable speed and the second cooler (19) by means of a chiller (21) , wherein the fan (20) is controlled, based on a calculated temperature T1 of the gas at the inlet (11) of the drying section (6) when the chiller (21) is switched off and wherein the chiller (21) is controlled, based on the actual temperature T2 of the compressed gas at the inlet (11) of the drying section (6) .
2.- Drying device according to claim 1, characterized in that the drying device (3) is provided with a controller (29) for the fan (20) and the chiller (21) , wherein the controller (29) will control the fan (20) based on Tl, wherein the speed of the fan (20) is increased as T1 increases and wherein the chiller (21) is controlled, based on T2, wherein the chiller (21) is switched on when T2 is higher than a threshold value T2 max, wherein the cooling capacity of the chiller (21) is chosen such that T2 remains equal to the threshold value T2 max.
3.- Drying device according to claim 2, characterized in that the chiller (21) is switched on when T2 is higher than the threshold value T2 max and when the fan (20) runs at its maximum speed.
4.- Drying device according to any one of the preceding claims 2 or 3, characterized in that the controller (29) will switch off the chiller (21) when T2 falls below T2 max and wherein the controller (29) will reduce the speed of the fan (20) when T1 is lower than T2 max, reduced by a specific value .
5.- Drying device according to any one of the preceding claims, characterized in that a heat exchanger (16) is provided in the regeneration line (15) for heating the regeneration gas .
6.- Drying device according to claim 5, characterized in that said heat exchanger (16) uses heat of compression of the compressed gas to be dried to heat the regeneration gas.
7.- Drying device according to any one of the preceding claims, characterized in that a return line (23) is connected to the outlet (14) of the regeneration section (7) , which connects the outlet of the regeneration section (7) to a point on the pressure line (10) , downstream of the second cooler ( 19 ) .
8.- Drying device according to any one of the preceding claims, characterized in that a third cooler (25) and optionally a liquid separator (26) are incorporated into said return line (23) , wherein the third cooler (25) is cooled by said fan (20) .
9.- Drying device according to claim 7 or 8, characterized in that the return line (23) is connected to the pressure line (10) via a venturi (24) .
10.- Drying device according to any one of the preceding claims 5 to 9, characterized in that the heat exchanger (16) is provided in the pressure line (10) , upstream of the first cooler ( 18 ) .
11.- Drying device according to any one of the preceding claims, characterized in that the first cooler (18) and/or the second cooler (19) are provided with a liquid separator (26) .
12.- Drying device according to any one of the preceding claims, characterized in that the dryer (4) is provided with a housing (27) within which the drying section (6) and the regeneration section (7) are located, wherein in the housing (27) a drum (28) is arranged containing the drying agent (5) , which drum (28) is connected to drive means such that the drying agent (5) can be moved successively through the drying section (6) and the regeneration section (7) .
13.- Drying device according to any one of the preceding claims, characterized in that the dryer (4) comprises a number of vessels filled with the drying agent (5) , of which at least one vessel forms the drying section (6) and at least one vessel forms the regeneration section (7) , wherein the dryer (4) further comprises a valve system that connects the outlet line (9) , the regeneration line (15) and optionally the return line (23) and the branch line (17) with said vessels, wherein said valve system is such that at least one vessel is always regenerated, while the other vessels dry the compressed gas, wherein each vessel is regenerated in turn by controlling of the valve system.
14.- Compressor installation, comprising a compressor (2) and a drying device (3) according to any one of the preceding claims .
15.- Method for drying a compressed gas using a drying device (3) comprising a dryer (4) provided with a drying agent (5) or desiccant and which is provided with a drying section (6) with an inlet (11) for compressed gas to be dried and an outlet (12) for dried compressed gas, and with a regeneration section (7) with an inlet (13) and an outlet (14) for a regeneration gas, wherein a regeneration line (15) is connected to the inlet (13) of the regeneration section (7) , wherein a branch line (17) is provided at the outlet (9) of the drying section (6) , which connects to the regeneration line (15) for branching off regeneration gas at the outlet (9) of the drying section (6) , wherein a pressure line (10) is connected to the inlet (11) of the drying section (6) , wherein a first cooler (18) and a second cooler (19) are successively incorporated, wherein the first cooler (18) is cooled by means of a fan (20) with adjustable speed and the second cooler (19) by means of a chiller (21) , characterized in that the method comprises the following steps : a) controlling the fan (20) based on the calculated temperature T1 of the gas at the inlet (11) of the drying section (6) when the chiller (21) is switched off; b) controlling the chiller (21) based on the actual temperature T2 of the compressed gas at the inlet (11) of the drying section (6) .
16.- Method according to claim 15, characterized in that step a comprises the following sub-steps: al) switching on the fan (20) when the drying device (3) is switched on; a2 ) increasing the speed of the fan (20) as T1 increases; and that step b comprises the following sub-steps : bl) switching on the chiller (21) when T2 is higher than a threshold value T2 max; b2 ) controlling the cooling capacity of the chiller (21) such that T2 remains equal to the threshold value T2 max.
17.- Method according to claim 16, characterized in that the chiller (21) is switched on when T2 is higher than a threshold value T2 max and when the fan (20) runs at its maximum speed .
18.- Method according to any one of the preceding claims 15 to 17, characterized in that the controller (29) will switch off the chiller (21) when T2 falls below T2 max and wherein the controller will reduce the speed of the fan (20) when T1 is lower than T2 max, reduced by a specific value.
EP24777298.1A 2023-09-04 2024-09-02 Drying device for compressed gas, compressor installation provided with drying device and method used thereby Pending EP4774050A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE20235729A BE1031935B1 (en) 2023-09-04 2023-09-04 Compressed gas drying facility, compressor installation equipped with drying facility and method used
PCT/IB2024/058518 WO2025052234A1 (en) 2023-09-04 2024-09-02 Drying device for compressed gas, compressor installation provided with drying device and method used thereby

Publications (1)

Publication Number Publication Date
EP4774050A1 true EP4774050A1 (en) 2026-07-15

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EP24777298.1A Pending EP4774050A1 (en) 2023-09-04 2024-09-02 Drying device for compressed gas, compressor installation provided with drying device and method used thereby

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EP (1) EP4774050A1 (en)
KR (1) KR20260060407A (en)
CN (1) CN119548957A (en)
AU (1) AU2024336152A1 (en)
BE (1) BE1031935B1 (en)
MX (1) MX2025015389A (en)
TW (1) TWI926394B (en)
WO (1) WO2025052234A1 (en)

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KR20260060407A (en) 2026-05-04
BE1031935B1 (en) 2025-03-31
AU2024336152A1 (en) 2026-01-08
WO2025052234A1 (en) 2025-03-13
CN119548957A (en) 2025-03-04
TWI926394B (en) 2026-05-21
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