BE1030642A1 - Device for drying compressed gas and compressor installation provided with such device. - Google Patents

Abstract

Device for drying compressed gas, with a dryer inlet (2) and a dryer outlet (3), which device (1) comprises at least two vessels (4a, 4b) containing a regenerable drying agent (5) and an adjustable valve system (8 ) consisting of a first valve block (9a) connecting the dryer inlet (2) to an inlet (6) of the aforementioned vessels (4a, 4b) and a second valve block (9b) connecting the dryer outlet (3) to an outlet (7 ) of the vessels (4a, 4b), where the valve system (8) is such that at least one vessel (4b) is always regenerated, while the other vessels (4a) dry the compressed gas, whereby by controlling the valve system (8) the vessels (4a, 4b) are successively regenerated, characterized in that each vessel (4a, 4b) is provided with an input (11) for a regeneration gas, whereby the device (1) is provided with a blower (23) for supplying ambient air as regeneration gas.

Description

'1 BE2022/5476

Device for drying compressed gas and compressor installation provided with such device.

The present invention relates to a device for drying compressed gas,

More specifically, the invention is intended for drying compressed gas coming from a compressor,

Such devices are already known, also called dryers, which comprise two or more separate vessels, each containing a quantity of regenerable desiccant or desiccant, the ferns each alternatively and alternately operating to dry compressed gas by adding the compressed gas to be dried. through which the desiccant is regenerated by bringing it into contact with a warm

Gas, also called regeneration gas.

Regeneration here refers to the process by which a

Moisture saturated or nearly saturated desiccant is stripped of the absorbed or adsorbed moisture by bringing it into contact with a regeneration gas which will remove the moisture from the desiccant. The desiccant can then be used again for drying.

By means of an appropriate system of pipes and valves it is possible to switch between the two vessels,

N BE2022/5476 2

Devices are already known in which part of the dried, compressed gas is branched off via a regeneration line and used as regeneration gas.

A heater is often placed in this regeneration pipe to heat up the regeneration gas.

Although by heating the regeneration gas, less regeneration gas is needed and therefore there is less loss of dried, compressed gas, such an arrangement has a number of disadvantages,

Firstly, the heating will not only heat the regeneration gas, but also the ambient air and thus indirectly the vessels, which is of course undesirable for the vessels that are not regenerating.

Due to the aforementioned losses, the heating must also operate at a higher temperature. In order to obtain a sufficiently high temperature of the regeneration gas, or more regeneration gas will have to be tapped off to ensure that the desiccant can be sufficiently regenerated in an acceptable period of time. .

Moreover, this regeneration gas is blown off after passing through the var, which entails a loss of dried compressed gas.

Dryers are also used in which the external heating is placed in the barrels instead of in the regeneration pipe.

The advantage is that the heat losses from the previous heating will end up in the vessel that is regenerating, i.e. exactly at the location where this heat is desired and useful. : A disadvantage of these dryers remains that dried compressed gas is used as regeneration gas. 19 This means that part of the efficiency of regenerating the desiccant is lost,

Although such type of dryer succeeds in drying the compressed gas sufficiently, the consumption of dried compressed gas as regeneration gas is too high to consider such a dryer efficient.

The present invention aims to provide a solution to the aforementioned and other disadvantages.

The present invention concerns a device for

Compressed gas dryer, with a dryer inlet for compressed gas to be dried and a dryer outlet for dried compressed gas, which device comprises at least two valves containing a regenerable drying agent and a control valve system consisting of two valve blocks, namely a first valve block containing the aforementioned dryer inlet connecting to an inlet of the aforesaid vessels and a two-valve block connecting the aforesaid dryer outlet to an outlet of the aforesaid vessel, the aforesaid valve system being such that at least one vessel is always regenerated, while the other vessels dry the compressed gas, wherein By controlling the valve system, the vessels are each in turn regenerated, characterized in that each is provided with an input for a regeneration gas with a regeneration line attached thereto for supplying the regeneration gas to the vessel that is being regenerated, wherein the regeneration line extends at least partially through the regeneration gas input

LU extends the barrels, wherein a heater is provided in the barrels and is located in the regeneration line for heating the regeneration gas before the regeneration gas is sent through the desiccant into the barrel that is being regenerated, the device also being provided with a discharge line for discharging the regeneration gas after it has passed through the vessel that is being regenerated, which discharge line is connected via the tipping system to the entrance of the aforementioned vessels, wherein the device is provided with a blower for supplying ambient air as regeneration gas.

An advantage is that no compressed dried gas is split for regeneration and subsequently blown off.

This means that all compressed gas to be dried is effectively dried and that all dried compressed gas can be supplied to the end user,

_ BE2022/5476

S

An additional advantage is that by using the biower it is possible to suck in ambient air as the regeneration gas.

The biower also allows the flow of the regeneration gas to be controlled by simply adjusting the flow of the blower.

This allows to regulate the extent to which the regeneration of the desiccant takes place by increasing the flow rate of the biower if better regeneration of the desiccant is required,

Preferably, an intermediate pipe is provided between each vessel and the first valve block, with a first passage for gas to be dried that connects to the inlet of the relevant vessel and to the first valve block and a second passage for regeneration gas that connects to the aforementioned input for regeneration gas. the vessels, which passage for regeneration gas is part of the regeneration line.

An advantage of such an intermediate block is that it increases the modularity of the dryer, so that one or more additional vessels can easily be added because the necessary connections can be provided in such intermediate blocks for gas to be dried, regeneration gas and any cooling gas.

According to a preferred feature of the invention, the barrels are formed by extruded profiles,

This has the advantage that the barrels can be produced in a simpler and cheaper manner compared to xetels, which may or may not be provided with insulation along an inside and/or outside of the extruded profiles,

Naturally, the invention is not limited to this, and the barrels of cok can be manufactured in a different way.

Providing insulation on the inside and/or outside of the extruded profiles will significantly improve efficiency as there is less heat exchange with the environment. In a first practical embodiment, the regeneration pipes come together in a joint regeneration pipe to which the blower outlet is connected,

In this case, the bicwer will blow the ambient air through the vessel that is being regenerated. in a second practical embodiment the blower inlet is connected to the discharge pipe. in this case the biower will draw in ambient air that will first flow through the vessel being regenerated before passing through the blower.

The invention ALSO relates to a compressor installation 39 provided with a compressor with an inlet for gas to be compressed and an outlet with a pressure line for

; BE2022/5476 7 compressed gas, characterized in that the compressor installation is provided with a device according to one of the preceding claims for drying the compressed gas flow rate supplied by the compressor that is guided through the device for supplying dried gas to fish per consumer network the dryer outlet of the device, whereby the pressure pipe connects to the dryer inlet of the device.

The advantages of such a compressor device are similar to the advantages of the device according to the invention.

With the aim of better demonstrating the features of the invention, some preferred embodiments of a device for drying compressed gas and a compressor installation provided with such a device according to the invention are described below, as an example without any explanatory character, with reference to the accompanying drawings, in which: Figure 1 schematically represents a device according to the invention for drying a compressed gas according to the principle of dry air cooling and pressure regeneration; figure 2 shows a variant of figure 1, according to the principle of dry air cooling and vacuum reconstruction; Figure 3 shows an alternative embodiment of a device according to the invention for drying a compressed gas according to the principle of bio-air, open air cooling and pressure regeneration; figure 4 shows the embodiment of figure 3, but in a different position; figure 5 shows a variant of figure 3, according to the same principle: figure 6 shows a second variant of figure 3, according to the principle of biower air open loop cooling, and vacuum reconstruction; figure 7 shows a second alternative embodiment of a device according to the invention for drying compressed gas according to the principle of blower, air, closed loop cooling, and vacuum reconstruction;

Figure 8 shows a variant of figure 7 according to the biower air closed loop cooling principle, and pressure recovery: figure 9 shows a third alternative embodiment of a device according to the invention for drying a compressed gas, according to the dry air pressure cooling principle, and dry Air pressure regeneration; figure 10 shows a variant of figure 2, according to the principle of dry air vacuum cooling and dry air vacuum regeneration; figure 11 shows a second variant of figure 9, according to the principle of dry air pressure cooling, and dry

Air vacuum regeneration.

The device 1 for drying compressed gas shown schematically in Figure 1 comprises a dryer inlet 2 for drying compressed gas and a dryer outlet 3 for dried compressed gas.

The device 1 is provided with two vessels £a, 4b containing a regenerable desiccant 5,

However, it is not excluded for the invention that the device 1 comprises more than two vessels da, 4b. For example, the device 1 can also comprise four, six, eight or ten vessels,

Each var 4a, db is provided with an inlet 6 for gas and an outlet 7 for gas.

Furthermore, the device 1 is provided with a valve system 8.

This valve system 8 consists in this case of two valve blocks Sa, 9b, namely a first valve block Za that connects the aforementioned dryer inlet 2 with the inlet 6 of the aforementioned vessels da, 4b and a second valve block Sb that connects the aforementioned dryer outlet 3 with the exit 7 of the aforementioned vessels da, 4b.

In this case, the first valve block 9a is provided with two three-way valves 19.

The aforementioned tipping system 8 is such that one trap 4b is always regenerated, while the other vessel 4a dries the compressed gas. With more than two vessels da, 4b, at least one trap will always be regenerated while the other vessels dry.

By controlling the valve system 8, the vessels da, 4b are each in turn regenerated.

In this case, it will also be the case that the aforementioned valve system 8 is such that at least one vessel 4b is always regenerated and subsequently cooled, while the others dry the compressed gas, whereby by controlling the valve system B the vessels da, 4b each in turn successively regenerated and cooled,

However, this coupling step is not necessary for the invention.

According to the invention, each vessel 4a, 4b is provided with an input 11 for a regeneration gas with a regeneration line 12 connected thereto for supplying the regeneration gas to the vessel da, db that is being regenerated.

In this case, between each valve 4a, db and the first valve block 9a, and intermediate block 13 is provided with a first passage 14 for gas to be dried, which connects to the inlet 6 of the relevant vessel da, 4b and to the first valve block

Sa and a second passage 15 for regeneration gas connecting to the aforementioned input 11 for regeneration gas in the vessels da, 4b, which second passage 15 for regeneration gas forms part of the regeneration line 12.

A separate regeneration line 12 is provided for each vessel da, 4b.

nn BE2022/5476

In this case, an adjustable valve or return valve 16 is provided in the regeneration lines 12. This check valve 16 allows a gas to flow into the vessels da, 4b via the input 11 and prevents a gas from escaping from the vessels da, 4b via the input 11.

The regeneration lines 12 extend via the input 11 for regeneration gas at least with the section 12a into the vessels 4a, 4b.

In the vessels da, 4b, a heater 17a, 17b is provided, which is located in the regeneration line 12, more specifically in the section 12a of the regeneration line 12, for heating the regeneration gas before the regeneration gas passes through the desiccant 5 in the vessel 4b. is regenerated, is controlled.

As is clearly shown in the figures, the vessels 4a, 4b are provided along one of their ends with a free space ie in which there is no desiccant 5. The free end 12 of the regeneration lines 12 is located in this free space 18.

This ensures that the regeneration air can flow freely and without obstacles into the vessel 4b. in this case, this free space 18 is realized by means of a grid 20 which is kept at a distance from the end of the vessel da, 4b by a spring 21,

- BE2022/5476 12

This grid 20 is permeable to gas but not to desiccant 5,

The device 1 is also provided with a discharge line 22 for discharging the regeneration gas after it has passed through the trap 4b that is being regenerated.

This discharge line 22 is connected to the input via the valve system & more specifically the first valve biok Sa.

TO of the aforementioned vessels da, 4b.

The device 1 is also provided with a sensor blower 23 for supplying ambient air as regeneration gas. in this case the regeneration lines 12 come together in a common regeneration line 12 to which the blower outlet 24 is connected. Furthermore, in this case the device 1 is provided with a branch line 25. In this case two such branch lines 25 are provided.

By means of the branch line 25, a portion of the compressed dried gas can be branched off at the dryer outlet 3. This branched gas is used as cell gas as will be explained later.

The branch line 25 connects with one end to the aforementioned dryer outlet 3 and with its other end the branch line 25 connects to the relevant regeneration line 12 at a point located between the aforementioned input 11 and the aforementioned adjustable valve or non-return valve 16,

Expansion means 76 are provided in the branch lines 25 (3) for expanding the dried compressed gas before it ends up via the input 11 in the vessel 4b that is being cooled at that moment.

The operation of the device 1 as shown in figure 10 is very simple and as follows:

During the operation of the device 1, compressed gas to be dried will be supplied via the dryer inlet 2. This gas is led via the first clamping pin block Sa and the first passage 14 of the intermediate block 13 to the vessel da that will dry, in Figure 1 the left vessel da,

When passing through this vessel, the gas will be dried, whereby the desiccant 5 in this vessel 4a will adsorb the moisture 20 from the gas.

The dried, compressed gas can leave device 1 via the second valve block 5b and the dryer outlet 3 and be supplied to the end user. 25

At the same time, the other vessel 4b, the straight vessel 4b in Figure 1, will be regenerated in a first phase, during which the desiccant is dried by means of a regeneration gas.

To this end, the blower 23 will suck in ambient air and lead it via the regeneration line 12 to the vessel 4b that is being regenerated.

The sucked ambient air cannot flow to the vessel 4a that is drying because either the pressure of the sucked ambient air is too low to open the non-return valve 16 against the pressure of the vessel 4a that is drying or because the adjustable valve 16 in the regeneration line 12 is closed.

When the sucked ambient air enters the part 12a of the regeneration line 12 that extends into the vessel 4b, it will be heated by the heating 170 that is 153 turned on at this moment.

This heated ambient air will flow through the vessel 4b as regeneration gas and thereby remove moisture from the drying agent 5.

This regeneration gas then leaves via the first passage 14 of the cushion biok 13 and the first valve block.

Connect device 1 via discharge pipe 22.

After this first phase, the vessel 4b is cooled. To this end, a small portion of the dried compressed gas is branched off via the relevant branch line 25 and expanded, thereby cooling it.

Via the regeneration line 12: this cool or cold cooling gas ends up in the vessel 4b where the heat will

1st BE2022/5476

LO withdrawing the desiccant 5. The heating 17b is switched off,

This cell gas then also leaves the device LI via the first passage 14 of the intermediate block 13 and the first valve block Sa via the discharge line 22.

Figure 2 shows a variant of figure 1, where in this case the blower inlet 31 is connected to the discharge pipe 22. The device 1 is also provided with a zen blow-off opening 27 for the cooling gas, which blow-off opening 27 is connected to the entrance via the first valve block 9a. 6 of the barrels da, db.

The operation of the device 1 from figure Z is very analogous to the operation of the device 1 from figure 1.

In this case, the regeneration gas will be sucked in via the blower 23, with the ambient air entering the device 1 through the suction effect of the blower 23 via the regeneration line 12 and then via the vessel 4b and the first tipping biok Sa onwards to the discharge line 22 and the blower. 23 is sucked in. 23 This principle of regeneration is also called vacuum regeneration. The regeneration principle from figure 1 is called pressure regeneration.

Note that for the embodiment of flow 1 it is possible to realize a vacuum regeneration by simply turning the blower 23 over, with the blower inlet 31 connected to the regeneration line 12.

In a similar manner, in the embodiment of figure 2, pressure regeneration can be achieved by turning the blower 23 over, whereby the blower outlet 23 is connected 3 to the discharge pipe 22,

Returning to the embodiment of figure 2, for the cooling of the vessel 4b, in this case the cooling gas will, after passing through the entire device 1, leave it via the aforementioned blow-off opening 27 instead of via the discharge pipe 22.

To achieve this, there is a closable valve in the discharge line 22 between the blower 23 and the first valve block.

Provide LS 28 that is closed during the cooling phase so that the cooling gas escapes via the blow-off opening 27,

The alternative embodiment shown in figure 3 differs from figure 1 in the fact that the branch line 25 26 is absent. Furthermore, the check valves 16 in the regeneration lines 12 have been replaced by closable valve 28.

The major difference of this embodiment is that ambient air will now be used as cooling gas instead of tapped dried compressed gas. This is explained below. The cooling principle of this embodiment is according to the blower air principle, whereby ambient air supplied by the blower is used for cooling, while the cooling principle of the previous two embodiments is via the dry air cooling principle.

- BE2022/5476 where dried compressed gas is used for cooling,

To this end, the device 3 is provided with a

S valve device 29 which makes it possible to connect the aforementioned blower 23 to the device 1 in different ways. Figures 3 and 4 show the two positions of this valve device 29,

Figure 3 shows the position of the valve arrangement 29 in which the biowere outlet 24 is connected to the regeneration lines 12 for supplying a regeneration gas to the var 45 that is being regenerated, and at the same time the discharge line 22 is connected to a blow-off opening 27 for the regeneration gas, in this position, the right-hand vessel db will be regenerated, with the regeneration gas being sucked in by the blower 23 via the regeneration line 12 and the opened, closable valve 28 ending up in the vessel 4b. Just as in the previous embodiment of Figures 1 and 2, the heating 170 will are switched on to heat the regeneration gas,

After passing through this vessel 4b, the regeneration gas will leave the device $ via the first passage 14 of the intermediate block 13, the first tipping tank Oa, the discharge line 22 and the tipping device 29 through the aforementioned blow-off opening 27.

Figure 4 shows the position of the valve arrangement 29 in which the blower outlet 24 is connected to the discharge pipe 22 for supplying a cooling gas to the vessel 4b which is being cooled and at the same time the regeneration pipes 12 are connected to the aforementioned blowing opening Z7 for the cooling gas, in this position, the right-hand vessel 4b will be cooled, with the cooling gas being sucked in by the blower 23 and ending up in the vessel 4b via the discharge line 22 and the first valve block 9a. Just as in the previous embodiment of Figures 1 and 2, the heating 17b will be switched off.

After passing through this vessel 4b, this cell gas will leave the device 1 via the regeneration line 12 and the opened relevant shut-off valve 28 and the valve device 293 along the aforementioned blow-off opening 27.

In figures 3 and 4, the valve device 29 is provided with a four-way tilt valve 30. It is clear that the invention is not limited to this and that the valve device 29 can be realized in many different ways as long as it fulfills the functions described above.

As an example and without any limiting character, figure 5 shows a variant of figure 3, where in this case the valve system 5 comprises a number of closable 39 valves 26,

Note that in the embodiments of [figures 3, 4 and 4] it is possible to apply the principle of vacuum regeneration by turning the blower 23 over, connecting the blower inlet 31 to the regeneration pipes 5, 12 or the discharge pipe 22. Note that reversing the blower 23 is also possible in the embodiments discussed below. in the embodiments of Figures 3 to 5, the 16 regeneration was achieved by means of pressure regeneration.

Figure 6 shows a variant of figure 3 in which the regeneration is achieved by means of vacuum regeneration,

To this end, the device 1 is provided with a valve device 25 that allows either the blower inlet 31 to be connected to the discharge pipe 22 for sucking a regeneration gas through the vessel that is being regenerated, or the blower outlet 24 to be connected to the discharge pipe 22 for the supply of regeneration gas. a cooling gas for the vessel db that is being cooled. As this figure clearly shows, during regeneration the blower 23 will: suck in ambient air, which will be sucked in via 23 the regeneration line 12, the vessel 4b that is being regenerated, the first valve block 3a and the discharge line 22 to the blower 23 and via the blower outlet 24 the leave facility 21. Here again, the heating 170 in the relevant vessel 4b will be switched on.

In the other position of the tipping device 29, not shown in the figures but very analogous to the embodiment of figures 3 and 4, the blower 23 will be able to suck ambient air as cooling gas that flows into the vessel 4b via the discharge line 22 and the first valve block Sa. is cooled before it reaches the facility 1; leaves via the discharge pipe 22. In this case the heating 176 will be switched off. This principle is called open loop charging. 19

Figure 7 shows a second alternative embodiment of a device 1 according to the invention, which differs from Figure 6 in the fact that a feedback line 32 is provided running from the blower inlet 31 to a point 25 on the regeneration line 12 such that a closed circuit is formed for cooling gas consisting of the regeneration pipes 12, the feedback pipe 32 and the supply pipe 22 when the bioprocess outlet 24 is connected to the discharge pipe 22 for supplying a cooling gas to the vessel 4b that is being cooled, wherein a closable valve 28 is located in this feedback pipe 32 is provided and a cooler 33 for cooling regeneration gas. in this case, during regeneration, the regeneration gas <5 will follow the same path as described for figure 6. The closable valve 28 in the feedback line 32 will be closed and the heating 217b in the relevant trap 42 that is being regenerated will also be switched on.

54 BE2022/5476

With regard to the cooling of the vessel 4b, the cooling gas sucked in by the blower 23 will, after regeneration, now open a closed path through the device 1 as described above: case in figure €, a reuse or recycling of the cooling gas will now take place, whereby after passing through the vessel db, the cooling gas is cooled in the feedback line 32 before it is sent back to this vessel 4b by the biower 23. This principle is called closed loop cooling.

An advantage is that by not always fresh or new

To draw in ambient air, additional moisture, which is unavoidably present in ambient air, is not always introduced into this vessel 4b.

Piguur € is a variant of figure 7 where again the cooling gas runs through a closed path. The difference lies in the fact that where figure 7 the regeneration took place by means of the principle of vacuum regeneration, in figure 8 this takes place by means of pressure regeneration just as in figure 3,

To this end, the valve device 29 as shown in Figure 3 has been adapted and provided with a non-return valve 16 which prevents gas from leaving the device 1 via the blow-off opening 27 when the valve device 29 connects the regeneration line 12 to the aforementioned blow-off opening 27, and that the device 1 is provided with is of

As BE2022/5476 dd sen feedback line 32 running from the blower inlet 31 to a point on the regeneration line 12 such that a closed circuit is formed for refrigerant gas consisting of the regeneration lines 12, the feedback line 32 and the discharge line 22 when the blower outlet 24 is connected to the discharge line 22 for supplying a cooling gas to the vessel 4b that is being cooled, wherein a closable valve 28 is provided in this feedback line 32 and a cooler 33 for cooling regeneration gas. 12

For regeneration, the blower 23 will suck in ambient air, which can end up through the return valve 16 into the regeneration line 12 and the vessel 4b that is being regenerated, such as the situation in figure 3.

For cooling, the ambient air sucked in by the blower 23 will be able to circulate through the device 1 thanks to the feedback line 32, such as the situation in figure 7.

Figure 3 shows a third alternative embodiment, which is very similar to the embodiment of figure 3 and in which the device 1 is additionally provided with a boiler 34 filled with a regenerable desiccant 5 which is included between the regeneration lines 12 and the tipping device 29 in such a way that when the blower exhaust 24 is connected by the valve arrangement 29 to the regeneration lines 12, the regeneration gas must pass through the boiler 34 and so that when the regeneration lines 12 are connected to the

Ln BE2022/5476 23 blow-off opening 27 the cooling gas must pass through the boiler 34,

Preferably, the internal volume of the boiler 34 is a maximum of 1/3 or a maximum of 1/4 of the internal volume of one of the aforementioned at least two vessels da, db.

The preferred maximum dimensions of the boiler 34 will depend on the expected environmental parameters. if the relative humidity is 100%, the internal volume of the boiler 34 is preferably 1/3 of the internal volume of the aforementioned vessels 4a, 4b.

If the relative humidity is 70%, the internal volume of the boiler is 34 bi? preferably 1/4 of the internal volume of the aforementioned fern da, db.

Such a volume of the boiler 34 provides sufficient coarsening agent 5 to properly carry out or realize the drying and regeneration process described below.

During regeneration, the regeneration gas sucked in by the blower 23 will pass through the aforementioned boiler 34 and will therefore be dried, as a result of which the regeneration of the vessel 4b will be optimal and efficient. The regeneration of the vessel 4b is further as described in Figure 3,

In addition, during regeneration the desiccant 5 from the boiler 34 will be saturated with moisture from the ambient air,

During the cooling of the vessel 4b, the ambient air sucked in by the biower 23 will leave the device 1 after passing through the vessel 4b, which is being cooled, after passing through the seat 34. The cooling of the vessel db is further described as 9 for Figure 4,

After passing through the vessel 4b, which is cooled, the cooling gas has been heated and will therefore regenerate the desiccant 5 in the boiler 34.

This means that the boiler 34 can dry regeneration gas again in a next phase,

Figure 10 is a variant of figure 9. Since figure 3 concerned pressure regeneration and also concerned pressure cooling for cooling, since the blower 23 pushed sucked ambient air through the device 1, figure 10 concerns vacuum regeneration and also vacuum cooling where the blower 23 sucks ambient air via the device 1, In other words, the air that the blower 23 sucks has passed through the device 1 before flowing through the biower 23,

To achieve this, a number of changes have been made to the device L and more specifically to the orientation of the blower 23 and the valve device 29,

These changes mean that the valve device 29 allows either: - to connect the blower inlet 31 to the discharge pipe 22

_ BE2022/5476 25 for supplying a regeneration gas to the vessel 4b that is being regenerated, and at the same time connecting the regeneration lines 12 to a suction opening # 35 for the regeneration gas: either to: { S= connecting blower inlet 31 to the regeneration lines 12 for supplying a cooling gas to the vessel 4b that is being cooled and at the same time connecting the discharge pipe 22 to the aforementioned suction opening 35 for the cooling gas.

Furthermore, the aforementioned modifications include that the boiler 34 is housed between the regeneration lines 12 and the tipping device 29 such that when the blower inlet 31 is connected to the discharge pipe 22 by the tipping device 29, the regeneration gas must pass through the boiler 34 before entering the vessel. db to be controlled that is being regenerated and so that when the blower inlet 31 is connected 29% to the regeneration lines 12 by the valve pin device, the valve must pass through the boiler 34 before leaving the device 1.

The regeneration and cooling are done similarly to Figure 5.

Figure 11 shows a second variant of figure 3, which is closely related to the embodiment of figure 6. The bottom line is that the boiler 34 from figure 3 has been added to the variant of figure 6.

To this end, the boiler 34 is connected to the regeneration lines 12 in such a way that when the blower inlet 31 is connected to the discharge line 22 the supplied regeneration gas must pass through the boiler 34 and {5 such that when the blower outlet 24 is connected to the { discharge line 22 the cell gas must pass through boiler 34 # to leave facility 1. in this case the regeneration is based on the principle of vacuum regeneration and the cooling is based on the principle of pressure cooling,

The regeneration and cooling is achieved in a very similar manner to Figure 6. The principle of drying the ambient air of the boiler 34 and regenerating the desiccant 5 in the boiler 34 by the cooling gas is as described for Figures 3 and 10,

As can be seen in the figures, vessels da and 4b are each equipped with a temperature sensor 36.

Temperature sensors 36 will monitor the temperature of the regeneration gas. During the regeneration of a vessel ia or 4b, the relevant heater 17a, 175 will be switched on in this vessel 4a or 4b. The heater 17a, 176 will be switched on or off until the temperature sensor 36 measures the desired temperature.

The present invention is by no means limited to the embodiments described by way of example and shown in the figures, but a device for drying compressed gas and a compressor installation provided with such a device according to the invention can be realized in all kinds of shapes and dimensions without departing from the scope of the invention. invention,

Claims (1)

Conclusions. 1.- Device for drying compressed gas, with a dryer inlet (2) for compressed gas to be dried and a dryer outlet {3} for dried compressed gas, which device {1} comprises at least Ltwo vessels (da, 4b)} with { arranged therein is a regenerable desiccant (5) and a controllable tipping system 16} consisting of two # 10 valve blocks (Ba, 90), namely a first valve block {Da} that connects the aforementioned dryer inlet {2} with an inlet {6} of the the aforementioned vessels (4a, 4bi) and a second valve block (90) connecting the aforementioned dryer outlet (33) with the outlet (7) of the aforementioned vessels (da, 4b), wherein the aforementioned valve system (8) is such that at least one vessel is always (4b) is regenerated, while the other vessels (4a) dry the compressed gas, whereby by controlling the valve system (8) the vessels (£a, 4b} are each in turn regenerated, characterized in that each vessel (da , db} is provided with an input {11} for a regeneration gas with a regeneration line (12) connected to it for supplying the regeneration gas to the vessel {4b} that is being regenerated, whereby the regeneration line {12} extends via the input {11 } for regeneration gas extends at least partially into the fern (da, db}, whereby a heater (17a, 176} is provided in the vessels (4a, 4b} which is located in the regeneration line (12) for heating the regeneration gas before the regeneration gas is sent through the desiccant (9) in the vessel (4b) that is being regenerated, the device {1} also being provided 29 BE2022/5476 is of a discharge line (22) for discharging the regeneration gas after it has passed through the vessel {4b} that is being regenerated, which discharge line (22) is connected to the inlet (6) via the valve system (8). ) 9 5 of the aforementioned vessels (4a, 4b), wherein the device (1) is provided with a blower (23) for supplying ambient air as regeneration gas. Device according to claim 1, characterized in that an intermediate block (13) is arranged between each vessel (£a, 4b} and the first valve block (9a) with a first passage {ld} for gas to be dried which connects to the inlet (6) of the relevant vessel (4a, 4b) and on the first tilting block (9a) and a second passage (15) for regeneration gas that connects to the aforementioned input (11} for regeneration gas in the vessels (da, 4D}, which passage (24) for regeneration gas is part of the regeneration line {12}. Device according to any of the preceding claims, characterized in that the vessels (4a, 4b} are formed by extruded profiles, which may or may not be provided with insulation along an inside and/or outside of the extruded profiles. 4. - Device according to any of the preceding claims, characterized in that the regeneration lines 12 come together in a common regeneration line (12) to which the blower outlet {24} or blower inlet (31) is connected, DS. Device according to one of the preceding claims 1 mA BE2022/5476 360 to 3, characterized in that the blower inlet (31) or the blower outlet (24) is connected to the discharge pipe (22). # 6. - Device according to one of the preceding claims, characterized in that an adjustable valve or non-return valve (16) is provided in the regeneration lines (12), ; 7.7 Device according to any of the preceding claims, characterized in that the aforementioned valve system {8} is such that at least one vessel {4b} is always regenerated and subsequently cooled, while the other vessels (da) dry the compressed gas, whereby by control of the valve system (8) the vessels {4a, 4b} are each in turn regenerated and cooled in turn, &,- Device according to claims 6 and 7, characterized in that the device {1} has an air branch line {45}; comprising for branching compressed dried gas to { the aforesaid dryer outlet (33) of the device {1}, which branch line {253 connects to the aforesaid regeneration lines (17) at a point located between the input {li} of the vessels (4a, 4b} and the adjustable valve or non-return valve (16) are provided in the regeneration lines {12}, wherein expansion means (26) are provided in the branch line (25) for expanding the dried compressed gas before it enters via the input (11). the vessel (4b) being cooled ends up as a cooling gas. Device according to claims 4 and 7, characterized in that the device (1) is provided with a valve device (29) that allows either: - connecting the blower outlet (24) respectively the blower inlet {31} to the regeneration pipes (12) for supplying a regeneration gas to the vessel (4b) that is being regenerated, and at the same time connecting the discharge pipe (22} to a blow-off opening ( 27) for the # regeneralie gas; either to: { - connect the biower outlet (24), respectively the blower inlet # {231} to the discharge pipe (22) for supplying a cooling gas to the vessel (4b) that is cooled and at the same time connecting the regeneration lines (17) to the aforementioned cooling gas blow-off opening (27). Device according to claims 5 and 7, characterized in that the device {1} is provided with a tipping device (29) which allows either the blower inlet (31} to be connected to the discharge pipe (22) for sucking a regeneration gas through it the vessel {45} being generated or the Dbiowver outlet (24) is connected to the discharge line {22} for supplying a cell gas to the vessel (4b) being cooled. Device according to claim 9, characterized in that the aforementioned valve device (29) is provided with a non-return valve (16) which prevents gas from leaving the device {1} via the air blow opening {27} when the valve device (29) enters the regeneration line. {12} connects to the aforementioned blow-off opening (27), and that the device (1) is provided with a feedback line (323) that runs from the biowerinate (31) to a point on the 39 BE2022/5476 regeneration pipe (12) in such a way that a closed circuit is formed for refrigerant gas consisting of the regeneration pipes 12, the feedback pipe {32} and the discharge pipe (22) when the blower outlet (24) is connected to the discharge pipe (22) for the supplying a cooling gas to the vessel (4b) that is being cooled, wherein a closable valve (28) and a cooler (33) are provided in this feedback line {32} for cooling rain gas. 19 12,- device according to claim 10, characterized in that the aforementioned device {1} is provided with a feedback line (32) running from the blower inlet (31} to a point on the regeneration line {12} such that a closed circuit is formed for refrigerant gas consisting of the regeneration lines (12), the feedback line (32) and the discharge line (22) when the blower outlet (24) is connected to the discharge line (22) for supplying a refrigerant gas to the vessel (4b} being cooled , wherein a closable valve (28;) is provided in this feedback line (32) and a cooler {33} for cooling regeneration gas. Device according to claim 3, characterized in that the aforementioned device {1} is provided with a boiler (34) filled with a regenerable desiccant (5) which is included between the regeneration lines {13} and the valve device {23} such that when the blower outlet {24} is connected by the tipping device (29) to the regeneration pipes (12), the regeneration gas must pass through the boiler {34} and so that when Oe 33 BE2022/5476 regenerative pipes (12) are connected to the blow-off opening (27) the cooling gas must pass through the boiler (34), 1â. - Device according to claim 10, characterized in that the aforementioned device {1} is provided with a boiler # (34} filled with a regenerable desiccant (5) which is connected to the regeneration pipes {12} such that # when biowere inlet {313 is connected to the discharge pipe (22) the supplied regeneration gas must pass through the boiler (34) and in such a way that when the blower outlet (24) is connected to the discharge pipe (22) the cooling gas must pass through the boiler {34} to to leave the facility (13, iS. Device according to claims 4 and 7, characterized in that the aforementioned device (1) is provided with a valve device (29) which allows either: - to connect the blower inlet {31} to the discharge pipe (22} for supplying a regeneration gas to the vessel (26) that is = being regenerated, and at the same time connecting the regeneration pipes (12) to a suction opening {35} for the regeneration gas; or to: - connect the blower inlet (31) to the regeneration pipes {12} for supplying a cooling gas to the vessel {db} that is being cooled and at the same time connecting the discharge pipe {22} to the aforementioned suction opening {35} for the cooling gas; wherein the aforementioned device {1} is provided with a boiler {34} filled with a regenerable desiccant (5} which is included between the regeneration pipes {12} and the 34 BE2022/5476 lapping device {23} such that when the blower inlet (31) is connected to the discharge pipe (22) by the blower device (29), the regeneration gas must pass through the boiler (34) before being sent to the vessel (4b) S is being regenerated and so that when the biomerinate {31} is connected by the valve device (29} to the regeneration pipes {12}, the cooling gas must pass through the boiler (34) before leaving the device (1), 16. - Device according to one of the preceding claims 5 to , characterized in that the valve device (293) comprises a four-way valve {30} and/or that the valve pin device (2%) comprises a number of closable valves (28). one of the preceding claims 13 to 15, characterized in that the internal volume of the boiler (34) is a maximum of 1/3 or a maximum of 1/4 of the internal volume of one of the aforementioned at least Ltwo vessels (4a, Ab}, 18. - Compressor installation provided with a compressor with a center for compressed gas and an outlet (29) with a pressure line for compressed gas, characterized in that the compressor installation is provided with a device {1} according to any of the preceding claims for drying the flow of compressed gas supplied by the compressor, which is led through the device (1) for the supply of dried gas to the servo supply network via the dryer outlet (3) of the device (1), whereby the pressure pipe connects to the - BE2022/5476 dryer inlet (2) of the device (13,