BE1030642B1 - 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

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 COMpPressor. 19

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 vessels each alternatively and alternately operating to dry compressed gas by compressing it to be dried: Gas is passed through it and CM is generated, becoming the desiccant

Regenerated by bringing it into contact with a warm gas, also called regeneration gas.

Regeneration here refers to the process in which a

MEL moisture saturated or almost 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 the dryer.

By means of a suitable system of pipes and valves it is possible to switch between the two vessels.

- BE2022/5476 €

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

Such a device is known, for example, from 3 WO2003/043123 A1,

A heater is often placed in this regeneration line to heat up the regeneration system. This is known from, for example, WO202i/137176 A1,

LE

Although by heating the regeneration gas, less regeneration gas is needed and there is therefore 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 fern, 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 vessel, which entails a loss of dried compressed gas.

Dryers are also known in which the aforementioned heating is placed in the barrels instead of the regeneration pipe. This is also known from W02009/043173 A1, 9 5. An advantage is that the heat losses from the aforementioned heating will end up in the barrel that is regenerating. , 9 so 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.

Part of the efficiency is therefore lost to regenerate the desiccant.

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 relates to a device for drying compressed gas, with a pressure inlet for compressed gas to be dried and a pressure outlet for dried compressed gas, which device comprises at least two vessels containing a regenerable drying agent and an adjustable valve system consisting of two valve blocks, namely a first valve block that connects the aforementioned dryer inlet to an entrance of the aforementioned vessels and a two-valve block that connects the aforementioned dryer outlet to an exit of the aforementioned vessel, wherein the aforementioned valve system is such that at least one vessel is always regenerated, while the > other vessels dry the compressed gas, whereby by controlling the valve system the vessels are each in turn regenerated, characterized in that each vessel is provided with an input for a regeneration gas with a regeneration line connected to it for the

LG supplying the regeneration gas to the vessel that is being regenerated, whereby the regeneration line extends at least partially into the fern via the input for regeneration gas, whereby a heater is provided in the vessels located in the regeneration line for co-heating the regeneration gas before the regeneration gas is sent through the desiccant into the vessel being regenerated, the device also being provided with a discharge line for discharging the regeneration gas after it has passed through the vessel 2G being regenerated, which discharge line is connected via the valve system to the entrance to the aforementioned vessels, where the device is provided with a blower for supplying ambient air as regeneration gas, another advantage is that no compressed dried gas is separated off for regeneration and subsequently blown off.

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

_ BE2022/5476

An additional advantage is that by using the blower it is possible to suck in ambient air as the regeneration gas, 5 9 The biower can also increase the flow rate of the; regeneration gas can be controlled by simply adjusting the blower flow rate. i0 This allows the rate of desiccant regeneration to be controlled by increasing the blower flow rate if better desiccant regeneration is required,

Preferably, an intermediate block is provided between each vessel and the first valve blocks, with a first passage for gas to be dried that connects to the inlet of the relevant valve; var and on the first tipping block and a second passage for regeneration gas that connects to the aforementioned input for regeneration gas in 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 possibly carbon gas. 320 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 manner and cheaper compared to boilers, which may or may not be provided with insulation along an inside and/or outside of the exuded material. profiles,

Naturally, the invention is not limited to this, and the barrels can also be manufactured in a different way, 16

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, 35

In a very practical embodiment, the regeneration pipes come together in a joint regeneration pipe to which the blower outlet is connected.

In this case, the blower 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 suck in ambient air that will first flow through the vessel that is being regenerated before passing through the blower Le,

The invention also concerns a compressor installation provided with a compressor with an inlet for combination

_ BE2022/5476 7 compressed gas and an outlet with a return line for compressed gas, characterized in that the compressor installation is provided with a device according to one of the preceding claims for drying 3 the flow of compressed gas supplied by the compressor passing through the device is routed for the supply of dried gas to the consumer network via the dryer outlet of the installation, whereby the pressure pipe connects to the dryer inlet of the installation.

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 limiting character, with reference to the accompanying drawings, in which: figure 1 schematically shows 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 regeneration; Figure 3 shows an alternative embodiment of a device according to the invention for drying a compressed gas according to the principle of blower air, open loop 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 © shows a second variant of Figure 2, according to the principle of blower air, open Ius cooling, and vacuum regeneration: Figure 7 shows a second alternative embodiment of a device according to the invention for drying a compressed gas according to the blower principle. air closed loop cooling, and vacuum regeneration; figure 8 shows a variant of [figure 7 according to the blower air closed loop cooling principle, and pressure regeneration: figure 3 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 9%, 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 2a for compressed gas to be dried and a dryer outlet 3 for dried compressed gas.

The device 1 is provided with two vessels da, 4b with a regenerable desiccant 5 arranged therein.

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

Each trap 4a, 4b 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 & consists in this case of two valve blocks 9a, 9b, namely a first valve block Ja that connects the aforementioned dryer inlet 2 with the inlet 6 of the aforementioned vessels da, db and a second valve block 2b that connects the aforementioned dryer outlet 3 with the output 7 of the aforementioned valve da, db, 23 The first valve block Sa is in this case provided with two three-two valves 10. The aforementioned valve system 8 is such that one vessel 40 is always regenerated, while the other vessel Aa dries the compressed gas . If there are more than two barrels £a, 4b, at least one trap will be regenerated while the other barrels dry.

By controlling the valve system 8, the vessels da, ; 5 46 each regenerated in turn. In this case it will also be the case that the aforementioned valve system 8 is such that at least one vessel 4b 9 is always regenerated and subsequently cooled, while the

LG other vessels 4a dry the compressed gas, whereby the vessels Aa, 4b are each successively regenerated and cooled in turn by controlling the valve system 8,

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

According to the invention, each vessel da, db 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, 4b that is being regenerated. 22

In this case, between each vessel da, 4b and the first valve block 9a, an 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 4a, 4b and to the first valve block.

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

A separate regeneration line 12 is provided for each vessel 4a, €b,

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In this case, an adjustable valve or check 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 flowing out of the vessels £a, 4b ; escapes via the input 11, 9 The regeneration lines 12 extend via the input 11 for regeneration gas at least with the section 12a up to 20 into the vessels da, db,

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 co-heating the regeneration gas before the regeneration gas passes through the desiccant 5 in the vessel 4b, which is regenerated, is directed,

As is clear from the figures, the vessels da, 4b are provided along one of their ends with a free space 18 in which no desiccant 5 is present. The free end 19 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 that is kept at a distance of 32 from the end of the vessel Za, 4b by a spring Z1.

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

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

This discharge line 22 is connected via the valve system 8 and more specifically the first valve block Sa to the inlet 6 130 of the aforementioned vessels Aa, 4b,

The device 1 is also provided with a 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, part of the compressed dried gas can be branched off at the dryer outlet 3. This branched gas is used as a cooling gas such as

It 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 23 connects to the relevant regeneration line 12 at a point: located between the

_ BE2022/5476 13 the aforementioned input 11 and the aforementioned adjustable valve or non-return valve 16,

Expansion means 28 are provided in the branch lines 25 for expanding the dried compressed gas; before fishing the input 11 into the vessel 4b that is on that

The moment it is argued, it ends up.

The operation of the device 1 as shown in figure 30a is very simple and as follows.

During the operation of the device 1, compressed gas for drying will be supplied via the dryer inlet 2. This gas is led via the first valve block Sa and the first passage 14 of the intermediate block 13 to the vessel 4a, which itself dries, in Figure 1 the left vessel da.

When passing through this vessel 4a, the casing will be dried, whereby the desiccant 5 in this vessel 43 will adsorb the moisture from the gas,

The dried compressed gas can leave the device 1 via the second tipping bick Sb and the dryer outlet 3 and be delivered to the end user,

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 drying agent 5 is dried by means of a regeneration gas. 32

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. 3 The sucked ambient air cannot flow to the vessel that is drying because the pressure # of the sucked ambient air is too low. to open the check valve 15 against the pressure of the vessel 4a which 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 var 4b, it will be heated by the heater 176 that is currently switched on,

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

This regeneration gas then leaves via the first passage 14 of the intermediate block 13 and the first tipping block.

Connect device 1 via discharge pipe 22.

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

This cool or cold cooling gas ends up in the trap db via the regeneration line 12, where it is extracted from the heat trap by the drying agent 5. The heating 17b is not switched off,

This cooling gas then also supplies the device 1 via the discharge line 22 via the first passage 14 of the intermediate block 13 and the first valve block.

Figure 2 shows a variant of figure 1, where in this case the biogas 31 is connected to the discharge pipe 22. The device 1 is also provided with a relief opening 27 for the cooling gas, which relief opening 27 is connected to the input via the first valve block. 6 of the vessels 4a, 4b,

The operation of the device 1 from Figure 2 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 biower 23, with the ambient air flowing through the suction action of the blower 23 via the regeneration line 12. enters the device 1 and is subsequently sucked via the vessel Ab and the first valve block Ja further to the discharge line 22 and the blower 23 Loe.

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 figure 1 it is possible to realize a vacuum regeneration Le by simply turning the blower 23 over, with the blower inlet 31 connected to the regeneration line 12.

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

Returning to the embodiment of figure 2, for the cooling of the vessel 4b in this case the cooling gas will be used after passage through the entire device! leave it via the ; 10 the aforementioned exhaust opening 27 instead of via the discharge line 22,

To achieve this, a closable valve 28 is provided in the discharge line 22 between the slower 23 and the first valve block 9a, which 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 is present. 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 branched 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 based on the dry air bubble principle, whereby dried compressed gas is used for cooling.

To this end, device 1 is provided with a valve device 29 that makes it possible to connect the aforementioned biower 22 to device 1 in various ways. Figures 3 and 4 show the two positions of this valve device 29,

Figure 3 shows the position of the lapping device 29 in which the blower outlet 24 is connected to the regeneration pipes 12 for supplying a regeneration gas to the vessel 4b that is being regenerated, and at the same time the discharge pipe 22 is connected to a blow-off opening 27 for the phegeneration gas. 9 in this position the right-hand vessel db will be regenerated: whereby the regeneration gas is sucked in by the blower; 23 end up in the vessel 4b via the regeneration line 12 and the opened closable valve 28. Just like in the previous one

In the embodiment of figures 1 and 2, the heating 17b will be switched on to heat the: regeneration gas,

After passing through this vessel 4b, the regeneration gas will leave the device 1 via the first passage 14 of the intermediate block 13, the first outlet tube Sa, the discharge line 22 and the tipping device 23. Along the aforementioned blow-off opening 27,

Figure 4 shows the position of the valve arrangement 29 in which the blower outlet Z4 is connected to the discharge pipe 22 for supplying a cooling gas to the var 4b which is being cooled and at the same time the regeneration pipes 12 9 are connected to the aforementioned diverter opening 27 for the cooling gas. . In this position the right-hand vessel 4b will be cooled, whereby # the cooling gas is sucked in by the blower 23 and ends up in the vessel 4b { 10 via the { discharge line 22 and the first valve pin block Sa. Just as in the previous embodiment of the # figures 1 and 2, the heating 17b will be switched off.

After passing through this vessel 4b, this cooling gas will leave the device 1 via the regeneration line 12, the associated discharge valve 28 and the valve device 29, along the aforementioned relief opening 27.

In figures 3 and 4, the valve device 29 is provided with a four-way valve 30. It is clear that the invention is not limited to this and that the 2% tipping device 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, in which in this case the valve system 8 comprises a number of lockable tilting centers 28,

Note that in the embodiments of Figures 3, 4 and 4 it is possible to apply the principle of vacuum regeneration by inverting the blower 23, connecting the biowere inlet 31 to the regeneration pipes 5 12 or the discharge pipe 22. Note that turning the ciower 23 also in embodiments discussed below; is possible,

In the embodiments of Figures 3 to 5, the ID regeneration was achieved by means of pressure regeneration.

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

To this end, the device 1 is provided with a valve device 29 that allows either the blower inlet 31 to be connected to the discharge line 22 for sucking in a regeneration gas through the var 4b that is being regenerated, or the blower outlet 24 to be connected to the discharge line 22 for the supply of regeneration gas. a cell gas for the vessel db that is cooled,

As this figure clearly shows, during regeneration the blower 23 will suck in fresh air, which will be sucked in via the regeneration line 12, the vessel 4b that is being regenerated, the first valve block Za and the discharge line 22 up to the blower 23 and through the blower outlet 24 to the device 1. to leave. Here again, the heating 17b in the relevant vessel db is switched on.

In the other position of the valve arrangement 29, not shown in the figures but very analogous to the embodiment of figures 3 and 4, the blower 73 will be able to suck ambient air as exhaust gas that flows into the vessel 4b via the discharge line 22 and the first valve block. that is cooled ends up: before it leaves the device 1 via the discharge pipe 22. In this case the heating 17b will be switched off. This principle is called open ius cooling.

Figure 7 shows a second alternative embodiment of a device 1 according to the invention, which differs from Figure 6 in that a feedback line 32 is provided running from the blower inlet 31 to a point on the regeneration line 12 such that a closed circuit is formed. for cloud gas consists 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 var 4b which is being cooled, wherein in this feedback line 32 there is a closable valve 28 and a cooler 33 for cooling regeneration gas. in this case, during regeneration the regeneration gas 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 17b in the relevant vessel 4b that is being regenerated will also be switched on.

N BE2022/5476 21

For the purpose of cooling the vessel 4b, the cell gas sucked in by the blower 23 will, after regeneration, now pass through a closed path through the device 1 as above; described, ; Instead of continually drawing in new ambient air as cooling gas, as is the case in Figure 6, the cooling gas is now reused or recycled, whereby after passing through the vessel Ab, the cooling gas is cooled in the feedback line 32 before it passes through the biower. 23 is sent back to this vessel 4b. This principle is called closed loop cooling, ; The advantage is that by not always drawing in fresh or new ambient air, additional moisture, which is unavoidably present in ambient air, is not always introduced into this vessel 4b.

Figure 8 is a variant of figure 7 where again the cell gas passes through a closed path. The difference is that where figure 7 the regeneration took place by means of the principle of vacuum regeneration, this is done in figure 8 by means of pressure regeneration just as in figure 3. 25 .

To this end, the valve device 29 has been adapted as shown in Figure 3 and is provided with a non-return valve 16, which prevents the device from leaving the device 1 via the blow-off opening 27 when the valve device 29 connects the regeneration line 12 to the intended blow-off opening 27, and that the 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 cooling gas consisting of the regeneration lines 12, the feedback line 32 and the ; 5 discharge line 22 when the blower outlet 24 is connected to the discharge line 22 for supplying a cooling gas to the var 4b that is being cooled, in which case; A feedback line 32 is provided with a closable valve 28 and a cooler 33 for cooling regeneration gas.

Lü

For regeneration, the blower 23 will suck in ambient air, which can end up through the check 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 9 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

ZA is connected by the valve arrangement 29 to the regeneration pipes 12, the regeneration gas must pass through the vent 34 and so that when the regeneration pipes 12 are connected to the blow-off opening 27 the cooling box 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 solids da, 4b.

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 da, db.

If the relative humidity is 70%, the internal volume of the boiler 34 is preferably 1/4 of the internal volume of the aforementioned vessels Aa, Ab,

Such volume of the boiler 34 provides sufficient desiccant 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, so that the regeneration of the vessel 4b will proceed optimally and efficiently. The regeneration of the vessel 4b is further as described in Figure 3.

Additionally, 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 blower 23 will leave the device 1 after passing through the vessel 4b, which is being cooled, after passing through the boiler 34. The cooling of the vessel 4b is further described as 9 for file. 4.

After passing through the vessel 4b, which is cooled, the cooling gas is; heated up 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, up to 15 Figure 10 is a variant of figure 9, where figure © concerned pressure regeneration and also concerned a pressure cooling for cooling since the blower 23 sucked ambient air through the device. 1, figure 10 concerns vacuum regeneration and also vacuum cooling in which the blower 23 sucks ambient air through the device 1. In other words, the air that the blower 23 sucks has passed through the device 1 before flowing through the blower 23,

To achieve this, a number of changes have been made to device 1 and more specifically to the orientation of the blower 23 and the valve device 29.

These modifications amount to the fact that the tipping device 29 allows either: - to connect the blower inlet 31 to the discharge line 22 for supplying a regeneration gas to the vessel 4b that is being regenerated, and at the same time to connect the regeneration lines 12 to a suction opening 35 for the regeneration gas: either to: ; 5 - connecting the blower pipe 31 to the regeneration pipes 12 for supplying a cooling gas to the vessel 4b which is being cooled and at the same time connecting the discharge pipe 22 to the aforementioned suction opening 35 for the cous casing. 12

Furthermore, the aforementioned modifications include that the boiler 34 is included between the regeneration lines 12 and the # valve arrangement 29 such that when the blower inlet 31 { is connected by the valve arrangement 29 to the discharge line 22, the regeneration gas must pass through the boiler 34 # before reaching the vessel that, 4b can be controlled to be regenerated and so that when the biowerinate 31 is connected by the tipping device 29 to the regeneration pipes 12, the cooling gas flows through the

ZU boiler 34 must pass before it leaves device 1.

The regeneration and cooling is done similar to Figure 3,

Figure 11 shows a second variant of figure 9, which is closely related to the embodiment of [figure 56. This means that the boiler 34 from figure 9 has been added to the variant of figure 6.

For this purpose, the boiler 34 is connected to the regeneration pipes 12 in such a way that when the blower inlet 31 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 passes through the boiler 34. must pass to see the facility! to leave.

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 carried out in a very similar manner to Figure 9. 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 9. and 10.

As can be seen in the figures, the vessels da and 4b are each equipped with a temperature sensor 36. These temperature sensors 36 measure the temperature of the regeneration gas. During the regeneration of a vessel da or 4b, the relevant heating 178, 175 will be switched on. are da or db in this barrel. The heating 17a, 175 will be switched on or off until the temperature sensor 36 measures the desired Lempera treatment.

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 sizes without spouts in the frame of the invention,

Claims (1)

Conclusions, 9 1.- Device for drying compressed gas, with ; 5 zen dryer inlet {2} for compressed gas to be dried and a dryer outlet (3) for dried compressed gas, which device {1} comprises at least two vessels (da, 4b} containing a regenerable desiccant (5) and an adjustable valve system ( 83 consisting of two valve blocks (Da, 9b), namely a first tipping block {9a) that connects the aforementioned dryer inlet (2) with an inlet (6} of the aforementioned vessels (da, 4b} and a second valve block {9b} that the aforementioned dryer outlet (3) connects to an outlet {7} of the aforementioned vessels (da, 4h}, whereby the aforementioned valve system {&} is such that at least one vessel (4b) is always regenerated, while the other vessels (da ) dries the compressed gas, whereby, by controlling the valve system (8), the vessels ida, 4b} are each in turn regenerated, characterized in that 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 (4b) that is being regenerated, whereby the regeneration line {12} extends at least partially into the vessels (da, 4D) via the input {11} for regeneration gas extends, wherein a heater {17a, 17b) is provided in the vessels (da, db}, which is located in the regeneration line (12) for heating up the regeneration gas before the regeneration gas passes through the desiccant {5} in the vessel (4b). ) that is being regenerated is controlled, the device {1} also being provided with a discharge pipe (22) for discharging the regeneration gas after it has passed through the vessel {4b) that is being regenerated, which discharge pipe (22) via the valve system {8} is connected to the inlet (6) of the aforementioned vessels (4a, 40), whereby the device {1} is provided with a blower (23) for supplying { ambient air as regeneration gas, whereby the regeneration lines ( 12) come together in a common regeneration line {12} to which the blower outlet (24) or 9 to Blower inlet {31} is connected, whereby the aforementioned valve system (€) is such that at least one vessel (40) is always regenerated and subsequently cooled, while the other vessels (4a) dry the compressed gas, whereby the ferns (da, 40) are each in turn regenerated and cooled in turn, and wherein the device (13) is provided with a valve device (29) which allows either: - to connect the biower outlet (24} or the blower inlet (321) to the regeneration pipes {12} for supplying a regeneration gas to the vessel (db} that is being regenerated, and also to connect the discharge pipe (22) connecting to a relief opening (27) for the recovery gas; either to: - connect the biower outlet {24} or the blower inlet (31) respectively with the discharge pipe {22} for supplying a cooling gas to the var {db} that is being cooled and at the same time connect the regeneration pipes {12} with the said blow-off opening (27) for the booster gas, wherein said device {1} is provided with a boiler 134} 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 outlet (24) is connected by the tipping device {23} to the regeneration pipes (12), the regeneration gas must pass through the boiler {34} and so that when the 3 regeneration pipes (22) are connected to the blow-off opening {27} the cooling gas passes through the boiler (343 must : pass, Device according to claim 1, characterized in that between each vessel {4a, 4b) and the first valve block ({59a) an 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 on the first valve block {a} and a second passage {15} for regeneration gas that connects to the aforementioned inout {11} for regeneration gas in the vessels (4a, db}, 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, 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). Device according to claim 4, characterized in that the device {1} comprises a branch line {25} for branching compressed dried gas to the said dryer outlet {3} of the device (1), which branch line {25}; connects to the front regeneration pipes (12) at a point located between the input {11} of the vessels {da, 4b3 and the adjustable valve or the non-return valve {16} provided in ; 5 the regeneration lines (123), wherein expansion means (256) are provided in the branch line { (25) for expanding the dried compressed gas before it ends up via the input (11) into the vessel {4b} that is cooled as a refrigerant gas, 9 20 : G. - Device according to any of the preceding claims, characterized in that the aforementioned tipping device ; (29) provides LE with a non-return valve (16) that prevents gas from leaving the device {1} via the relief opening (27). When the valve arrangement (29) connects the regeneration line (12) to the aforementioned relief opening {27}, and that the device {1} is provided with a feedback line (32) that runs from the biowerinate (31) to a point on the regeneration line {12} such that a closed circuit is formed for cooling gas consisting of the regeneration lines 12, the feedback line (32 ) and the discharge line (22) when the biower outlet {24} is connected to the discharge line (22) for supplying a cooling gas but the vessel {4b} is being cooled, with a shut-off valve (28) in this feedback line (32) is provided and a cooler {33}; for cooling regeneration gas. f. Device according to one of the preceding claims, characterized in that the aforementioned device {1} is provided with a tipping device (29) that allows _ BE2022/5476 either: - connect the blower inlet {31} Le to the discharge pipe {22} to supply a regeneration gas to the vessel db} that is being regenerated, and at the same time prevent the regeneration pipes (12) from having a suction opening (35) for the regeneration gas; either to: - connect blower inlet {313) to the regeneration pipes (L2} for supplying a cooling gas to the vessel (4b) being cooled and at the same time connect the discharge pipe (27) 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 fluid (5) which is taken up between the regeneration lines (123 and the valve device (29) such that when the blower inlet (31) passes through the valve device (29) is connected to the discharge line (22), the regeneration gas must pass through the boiler {34} before being sent to the vessel (4b) being regenerated and so that when the {20 Liower inlet (31} passes through the valve arrangement ( 29) is connected to the regeneration pipes {12}, the cell gas must pass through the boiler (34) before leaving the device {1}. Device according to any one of the preceding claims, characterized in that the valve device {29} comprises a four-way tilt {30} and/or that the valve device (29) comprises a number of closable valves (26). 3.- Device according to any one of the preceding claims, 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 two vessels (4a, 40). id, Compressor installation provided with a compressor with { an inlet for compressed gas and an outlet (293) with a pressure line for compressed gas, characterized in that the compressor installation is provided with a device {1} according to one of the preceding claims for drying the flow of compressed gas supplied by the compressor that is led through the device (1) for Supply of dried gas to a consumer network via the dryer outlet (33 of the device (1), whereby the pressure pipe connects to the dryer inlet (2) ) of the device {1}.