Apparatus and method for drying compressed gas originating from compressor

Abstract

According to an embodiment, an apparatus for drying a gas (300, 700) wet-compressed by a compressor (101) comprises a supply (100), an adsorption dryer (12, 103), a cooler (104), a water separator (105), a discharge (106), and lines and valves (200-208), the apparatus further comprising an ejector manifold (107, 600) comprising a main flow passage (800) connected to the supply (100) and a suction flow passage (802, 801) connected to the adsorption dryer (102, 103), the lines and valves (200-208) are configured to utilize the ejector manifold (107, 600) to mix a portion of the dried compressed gas (301, 701) flowing through the suction flow passage (801, 802) with the wet compressed gas (300, 700) flowing through the main flow passage (800) at the supply (100) during the drying phase (402, 403, 502, 503).

Description

Technical Field

[0001] The present invention relates to an apparatus and a method for drying compressed gas, and in particular to an apparatus and a method for drying compressed gas from a compressor. Background Art

[0002] Compressed gas (e.g. air) from a compressor usually has a high moisture content. This moisture can be harmful to the pipeline network and is undesirable in certain applications. Therefore, it is well known that there is a need for equipment for drying compressed gas.

[0003] In BE1010132A3, a method and apparatus for drying gas compressed by a compressor are disclosed. Here, the compressed gas is dried by passing the compressed gas through a desiccant, and the used desiccant is regenerated by passing a portion of the compressed gas supplied by the compressor through the desiccant.

[0004] In BE1027364A1, a similar method and apparatus are disclosed, wherein a heating device and a venturi ejector are provided to exchange heat between the regeneration gas and the incoming compressed gas from the compressor, thereby shortening the regeneration time.

[0005] The disadvantages of these known methods and devices are that the regeneration time is too long and / or the complexity of the entire unit and the technical control of the unit is increased. In other words, a compromise must always be reached between the economic benefits of short regeneration time and technical optimization by reducing the complexity of the unit.

[0006] Therefore, it is an object of the present invention to provide an apparatus and a method to overcome one or more of the above-mentioned disadvantages of prior art solutions. More specifically, it is an object of the present invention to provide an apparatus and a method to result in shorter desiccant regeneration times without unnecessarily complicating the apparatus and the related method. Summary of the invention

[0007] According to the present invention, the above-mentioned object is achieved by providing an apparatus according to claim 1 according to a first aspect of the present invention, the apparatus comprising: a supply part, suitable for supplying wet compressed gas; a first adsorption dryer and a second adsorption dryer, suitable for filling with desiccant; a cooler and a water separator; a discharge part, suitable for discharging the dried compressed gas; a set of pipelines and valves; wherein the set of pipelines and valves are configured to make the wet compressed gas flow from the supply part successively to the first adsorption dryer and the second adsorption dryer, to the cooler and the water separator, to the second adsorption dryer and the first adsorption dryer, and to the discharge part in the first regeneration stage and the second regeneration stage, respectively; and further configured to The wet compressed gas is caused to flow from the supply part to the cooler and the water separator, to the second adsorption dryer and the first adsorption dryer, and to the discharge part in succession in the first drying stage and the second drying stage respectively; it is characterized in that: the equipment also includes an ejector manifold, the ejector manifold includes a main flow channel and a first suction flow channel and a second suction flow channel, the main flow channel is connected to the supply part, and the first suction flow channel and the second suction flow channel are connected to the first adsorption dryer and the second adsorption dryer, respectively, wherein the set of pipelines and valves is also configured to use the ejector manifold during the drying stage to mix a portion of the dried compressed gas flowing through the suction flow channel with the wet compressed gas flowing through the main flow channel in the supply part.

[0008] The device comprises components known in the prior art, such as two adsorption dryers, a supply and a discharge, and a cooling unit including a cooler and a water separator. In addition, the device comprises a set of pipelines and valves, which interconnect the various components or members and can perform different functions by the position of the valves (hereinafter also referred to as valves). Thus, the device can be used to perform both a regeneration phase and a drying phase.

[0009] According to the regeneration phase known in the prior art, the hot and humid compressed gas originating directly from the compressor flows through one adsorption dryer to heat the desiccant present in order to extract the moisture, while the other adsorption dryer is used to dry the wet compressed gas from the compressor after it has been cooled and the condensate extracted therefrom. The regeneration phase and the drying phase can be alternated between the two adsorption dryers to ensure the continuity of the dryers.

[0010] In order to solve the already listed disadvantages known in the prior art, the device also comprises an injector manifold.

[0011] The ejector manifold includes a main flow channel through which a fluid can flow and two suction flow channels fluidically connected to the main flow channel. By allowing the fluid to flow through the main flow channel, a negative pressure is generated at the suction flow channel, so that the fluid existing in the first suction flow channel and / or the second suction flow channel or in the pipeline connected thereto is sucked into the main flow channel by the generated negative pressure.

[0012] The ejector manifold is constructed and connected to allow wet compressed gas originating from the compressor to flow through the main flow channel. The two suction flow channels are each connected to the connection of the corresponding adsorption dryer. Due to the negative pressure principle just explained, combined with the arrangement and position of the valves, a part of the compressed gas that has been cooled and has flowed through the adsorption dryer will be mixed with the hot and humid compressed gas directly originating from the compressor. This is achieved by positioning the valve group so that this part of the gas can be mixed with the hot and humid compressed gas while the other part (i.e. the unmixed part) flows to the discharge part.

[0013] The innovative aspect of using a single ejector manifold in an apparatus for drying a gas wet compressed by a compressor can be positioned in two different configurations of the apparatus.

[0014] According to a first way, the ejector manifold may be connected to the adsorption dryer so that in two drying stages, a portion of the gas to be mixed via the suction flow channel flows successively through the cooler and the water separator, through the second adsorption dryer for the first drying stage and through the first adsorption dryer for the second drying stage, respectively. Hereinafter, this arrangement will be referred to as a first configuration.

[0015] According to a second way, the ejector manifold may be connected to the adsorption dryer so that in the second drying stage, a portion of the gas to be mixed via the suction flow passage flows successively through the cooler and the water separator, through the first adsorption dryer for the first drying stage and through the second adsorption dryer for the second drying stage, respectively. Hereinafter, this arrangement will be referred to as a second configuration.

[0016] According to the first configuration, for the regeneration phase, the wet compressed gas will flow to the first adsorption dryer, the first suction flow passage, the cooler and the water separator in the first regeneration phase, and to the second adsorption dryer, the second suction flow passage, the cooler and the water separator in the second regeneration phase. In other words, the position of the valve or valves is set so that the main flow passage of the ejector manifold is closed for the regeneration phase.

[0017] According to the second configuration, for the regeneration phase, the wet compressed gas will flow to the first suction flow passage, the first adsorption dryer, the cooler and water separator, the second adsorption dryer, and finally the exhaust portion in the first regeneration phase, and the wet compressed gas will flow to the second suction flow passage, the second adsorption dryer, the cooler and water separator, the first adsorption dryer, and finally the exhaust portion in the second regeneration phase. Similar to the first configuration, the main flow passage of the ejector manifold is also closed.

[0018] The portion of dried compressed gas to be mixed with the hot humid compressed gas represents 15% to 25%, preferably 20% of the dried compressed gas. In other words, the volume or mass of hot humid compressed gas at the input corresponds to 100% of the volume or mass, of which 15% to 25%, preferably 20%, will circulate internally and 100% will flow out through the discharge. However, it should be noted that other ratios are not excluded, depending on the load of the dryer.

[0019] A first advantage of the above-described device for drying wet compressed gases originating from a compressor is that, thanks to the use of an ejector manifold, only a single cooler and water separator are required. This not only makes the device more energy-efficient than known devices, but also less costly and less complicated to assemble. Additional components such as coolers and water separators known in the prior art make the configuration of the set of lines and valves more complicated, which means that the assembly of the above-described innovative device is indeed less complicated. This further reduces the risk of errors during the production of the drying device.

[0020] According to the first and second configurations, the adsorption dryer, and more particularly the desiccant present, can be regenerated with hot compressed gas.

[0021] In the first configuration, during the drying phase, the adsorption dryer through which the portion of the withdrawn dried and cooled compressed gas flows can be further regenerated, which is an additional advantage over the prior art devices. For the first drying phase, this corresponds to the first adsorption dryer, and for the second drying phase, this corresponds to the second adsorption dryer. This is possible because the diverted portion is the dried and cooled gas, which in fact ensures further drying of the desiccant present in the respective adsorption dryer.

[0022] Another advantage of both configurations is that the regeneration phase and the drying phase are not dependent on the heat present in the hot compressed gas at partial or low load of the compressor.

[0023] According to an embodiment, the device further comprises a measuring module configured to determine a regeneration state of the adsorption dryer.

[0024] The measuring module is, for example, a dew point meter and / or a group of pressure gauges, thermometers and differential pressure gauges. Through such an arrangement, the dew point can be determined indirectly.

[0025] By determining the regeneration state of the adsorption dryer, it is possible to determine when to switch between different regeneration phases and drying phases. To achieve this, the device may further include a control module, which controls a set of valves or valves based on the determined or derived regeneration state. Alternatively, the control module may also be located outside the device.

[0026] According to a second aspect of the present invention, according to claim 8, there is provided a method for drying gas compressed by a compressor by means of a first adsorption dryer and a second adsorption dryer, each adsorption dryer comprising a desiccant, the method comprising alternately performing a first regeneration stage and a second regeneration stage combined with a first drying stage and a second drying stage, respectively, the first regeneration stage and the second regeneration stage respectively comprising the following steps in sequence: regenerating the first adsorption dryer and the second adsorption dryer respectively by means of compressed gas; cooling the compressed gas and separating condensate from the compressed gas; drying the compressed gas by means of the second adsorption dryer and the first adsorption dryer respectively; the drying stage comprises the following steps in sequence: cooling the compressed gas and separating condensate to obtain cooled compressed gas; and drying the cooled compressed gas by means of the second adsorption dryer and the first adsorption dryer respectively to obtain cooled and dried compressed gas; characterized in that: before the cooling step, the drying stage further comprises the following steps: causing a portion of the cooled and dried compressed gas to flow through the first adsorption dryer and the second adsorption dryer respectively; mixing the compressed gas with the portion of the cooled and dried compressed gas.

[0027] The method is applicable to the device according to the first configuration as described above, in which case the listed advantages also apply.

[0028] According to a third aspect of the present invention, according to claim 9, there is provided a method for drying gas compressed by a compressor by means of a first adsorption dryer and a second adsorption dryer, respectively, each dryer comprising a desiccant, the method comprising alternately performing a first regeneration stage and a second regeneration stage combined with a first drying stage and a second drying stage, respectively, the first regeneration stage and the second regeneration stage sequentially comprising the following steps: regenerating the first adsorption dryer and the second adsorption dryer, respectively, by means of compressed gas; cooling the compressed gas and separating condensate from the compressed gas; drying the compressed gas by means of the second adsorption dryer and the first adsorption dryer, respectively; the drying stage sequentially comprising the following steps: cooling the compressed gas, thereby obtaining cooled compressed gas; and drying the cooled compressed gas by means of the second adsorption dryer and the first adsorption dryer, respectively, thereby obtaining cooled and dried compressed gas; characterized in that: before the cooling step, the drying stage further comprises the following steps: allowing a portion of the cooled compressed gas to flow through the first adsorption dryer and the second adsorption dryer, respectively; mixing the compressed gas with the portion of the cooled compressed gas.

[0029] The method is applicable to the device according to the second configuration as described above, in which case the listed advantages also apply.

[0030] According to an embodiment of the second aspect and the third aspect of the present invention, there is further provided a step of using the portion of gas to regenerate the desiccant of the first adsorption dryer and the second adsorption dryer, respectively.

[0031] This corresponds to the drying phase of the device according to the first aspect of the invention, wherein regeneration of the desiccant can thus take place during the drying phase by flowing the cooled, dehumidified gas through the respective adsorption dryer.

[0032] According to an embodiment of the second aspect and the third aspect of the present invention, a step of determining a regeneration state of the first adsorption dryer and / or the second adsorption dryer is further provided, wherein alternatingly performing the first regeneration stage and the second regeneration stage in combination with the first drying stage and the second drying stage, respectively, is based on the regeneration state.

[0033] The alternating execution of the regeneration phase and the drying phase is then furthermore achieved by a targeted actuation of the valve or valves so that their respective positions are changed between open and closed (or vice versa).

[0034] According to a fourth aspect of the invention, there is provided an ejector manifold suitable for use in an apparatus according to the first aspect and / or suitable for mixing compressed gas with a portion of cooled and dried compressed gas by a method according to the second and / or third aspect of the invention.

[0035] According to a fifth aspect, use of an injector manifold according to the fourth aspect is disclosed.

[0036] According to a sixth aspect, a compressor unit is disclosed, comprising a compressor, the outlet of the compressor being connected to the inlet of the apparatus according to the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described with reference to the accompanying drawings, in which:

[0038] Figures 1 to 4 Directions for drying compressed gas according to a first configuration and associated method are shown;

[0039] Figures 4 to 8 An apparatus for drying compressed gas according to a second configuration and associated method is shown;

[0040] Figure 1 A first regeneration phase according to a first configuration of an apparatus for drying a compressed gas and an associated method is shown;

[0041] Figure 2 shows a second regeneration phase according to the first configuration of the apparatus for drying compressed gas and the associated method;

[0042] Figure 3A first cooling and drying stage according to a first configuration of an apparatus for drying a compressed gas and an associated method is shown;

[0043] Figure 4 shows a second cooling and drying stage according to a first configuration of an apparatus for drying a compressed gas and an associated method;

[0044] Figure 5 shows a first regeneration phase according to a second configuration of an apparatus for drying a compressed gas and an associated method;

[0045] Figure 6 shows a second regeneration phase according to a second configuration of the apparatus for drying compressed gas and the associated method;

[0046] Figure 7 shows a first cooling stage according to a second configuration of an apparatus for drying a compressed gas and an associated method;

[0047] Figure 8 shows a second cooling stage according to a second configuration of the apparatus for drying compressed gas and the associated method;

[0048] Fig. 9 An injector manifold suitable for use with an apparatus as shown in the above figures is shown. DETAILED DESCRIPTION

[0049] The invention will be described with reference to some embodiments and with reference to some drawings, but the invention is not limited thereto but only by the claims. The drawings described are only schematic and non-limiting. In the drawings, for illustrative purposes, the dimensions of some elements may be exaggerated and not drawn to scale. The dimensions and relative dimensions do not necessarily correspond to actual implementations of the invention.

[0050] Furthermore, the terms first, second, third, etc. are used in the description and claims to distinguish between similar elements, but not necessarily to describe a sequential or chronological order. These terms are interchangeable under appropriate circumstances, and the embodiments of the invention may be used in sequences other than those described or illustrated herein.

[0051] In addition, the terms "top", "bottom", "above", "below", etc. are used in the description and claims for illustrative purposes, but not necessarily to describe relative positions. The terms so used are interchangeable where appropriate, and the embodiments of the invention described herein may be used in orientations other than those described or shown herein.

[0052] Furthermore, although various embodiments are referred to as "preferred embodiments", this should be interpreted as exemplifying how to implement the invention rather than limiting the scope of the invention.

[0053] The term "comprising" used in the claims should not be interpreted as being limited to the devices or steps set forth below; the term does not exclude other elements or steps. The term should be interpreted as indicating the presence of the features, elements, steps or components mentioned, but does not exclude the presence or addition of one or more other features, elements, steps or components or groups thereof. Therefore, the scope of the expression "the device comprises devices A and B" should not be limited to the device consisting of only components A and B. Meaning, for the present invention, only components A and B of the device are listed, and the claims are also interpreted to also include equivalents of these components.

[0054] Figures 1 to 8 Directions for drying compressed gas are shown. More specifically, Figures 1 to 4 A device according to a first configuration is shown, Figures 5 to 8 An apparatus according to a second configuration is shown.

[0055] refer to Figure 1 and Figure 4 , various components of the device according to the first configuration will be discussed. Therefore, it should be understood that these components or parts also exist in Figures 2 to 4 In the event that there are differences between the devices shown in the various drawings, explanations will be given.

[0056] exist Figure 1 In FIG. 1 , an apparatus is shown for drying compressed gas from a compressor 101. However, it should be understood that the compressor 101 itself does not necessarily constitute part of the apparatus itself.

[0057] The device has a supply connected to point 108. From point 108, three lines lead to three valves, namely valves 202, 203 and 204. There are also second adsorption dryers 102 and 103. Adsorption dryer 102 is arranged between valve 202 and valve 205. Adsorption dryer 103 is arranged between valves 203 and 207. In addition, adsorption dryer 102 is also arranged between valve 200 and valve 206. Adsorption dryer 103 is then also arranged between valve 201 and valve 208.

[0058] In other words, one adsorption dryer has two connections through which the gas flows. For each adsorption dryer in the device, two valves are provided at each connection. For adsorption dryer 102, these valves are valves 200 and 202 on one connection and valves 205 and 206 on the other connection. For adsorption dryer 103, these valves are valves 201 and 203 on one connection and valves 207 and 208 on the other connection.

[0059] also, Figures 1 to 4 The device shown includes an injector manifold 107. The injector manifold 107 is also Fig. 9 Further shown in .

[0060] Fig. 9 The illustrated injector manifold 107 is also suitable for use with the Figures 5 to 8 The device according to the second configuration is shown. The ejector manifold 107 comprises a main flow channel 800 having an inlet. The main flow channel 800 continues to an outlet 803. It should also be noted that the two suction flow channels 801 and 802 also merge at the outlet 803.

[0061] The operation of the ejector manifold 107 is as follows. By causing the fluid (i.e., gas or liquid) to flow through the inlet 800 to the outlet 803 (the inlet to the outlet corresponds to the main flow channel of the ejector manifold 107), a negative pressure is generated at the suction flow channels 801 and 802. Therefore, the fluid existing in the pipelines connected to the suction flow channels 801 and 802 will be sucked in. Then, the fluid in the main flow channel 800 is mixed with the fluid on the pipeline connected to the suction flow channels 801 to 802, and flows out through the outlet 802.

[0062] The ejector manifold 107 is connected so that the main flow passage 800 having an inlet is connected to the valve 204, which in turn is connected to the point 108 and then to the supply 100. Thus, this arrangement allows hot and humid compressed gas originating from the compressor 101 to flow through the main flow passage of the ejector manifold 107 when the valve train is provided as will be further explained.

[0063] The suction channels of the ejector manifold 107 are connected to valves 205 and 207, respectively. The outlet of the ejector manifold 107, i.e., the confluence of the main channel and the two suction channels, is connected to the cooler 104. After the cooler, there is a water separator 105. After the water separator, there are branches leading to valves 206 and 208.

[0064] Finally, the device has an outlet 106 which branches off between the valves 200 and 201 .

[0065] Apart from Figure 1 In addition, the above-mentioned equipment with components, parts, pipelines and pipeline groups is also Figures 2 to 4 Shown in.

[0066] The color of the valve indicates the available closed and open positions. Figure 1 , valves 200, 203, 204, 206 and 207 are shown as completely filled black areas, while valves 201, 202, 205 and 208 are shown as blank areas. The difference between the two illustrations is that the filled black surface represents a closed valve, while the blank surface represents an open valve.

[0067] Therefore, in Figure 1In FIG. 1 , the valve diagram shows closed valves 200, 203, 204, 206 and 207 and open valves 201, 202, 205 and 208. Figure 2 In FIG. 2 , the opposite situation is shown, namely open valves 200, 203, 206 and 207, and closed valves 201, 202, 205 and 208. In both cases, valve 204 remains closed.

[0068] The various regeneration and drying stages in the first configuration will now be discussed further. Figures 1 to 4 In FIG. 3 , hot and humid compressed gas directly originating from compressor 101 is represented by the line labeled line 300 , and compressed gas that has been cooled and dehumidified is represented by the line labeled line 301 .

[0069] Figure 1 The first regeneration stage 400 of the apparatus of the first configuration is shown. Here, valves 201, 202, 205 and 208 are open and valves 200, 203, 204, 206 and 207 are closed. The hot and humid compressed gas 300 from the compressor 101 flows through the input 100 to the first adsorption dryer 102 to regenerate the desiccant contained in the first adsorption dryer. The gas then flows from the ejector manifold 107 via the valve 205 and via the suction line to the cooler 104 and the water separator 105. Subsequently, the cooled and dehumidified gas 301 is further dried by the adsorption dryer 103 and flows to the discharge 106.

[0070] exist Figure 2 , the second regeneration stage 401 of the apparatus of the first configuration is shown. Here, valve 204 also remains closed, so that the main flow channel at the inlet 800 of the ejector manifold 107 remains closed. With valves 200, 203, 206 and 207 opened, and other valves 201, 202, 205 and 208 closed, the hot and humid compressed gas 300 first flows through the second adsorption dryer 103 for regeneration of the existing desiccant. After cooling and dehumidification 301, the gas flows to the first adsorption dryer for further drying.

[0071] Figure 3 A first drying stage 402 of the apparatus in a first configuration is shown, Figure 4 The second drying phase of this first configuration is shown. It should be noted here that for both phases, valve 204 is open and valves 202 and 203 are closed. This arrangement will cause the hot and humid compressed gas 300 to flow through the main flow channel 107 of the ejector manifold 107 via the inlet 800. As a result, negative pressure is generated on the two suction flow channels 801, 802. However, since valve 207 is closed, only the gas on the valve 205 side is sucked in.

[0072] The hot and humid compressed gas 300 is cooled 104, the water is separated 105, and then flows to the adsorption dryer 103 for further drying. Subsequently, a portion of the dried gas 301 is diverted to the first adsorption dryer 102, and another portion is diverted to the discharge portion 106. This is shown by the branch point between the valves 200 and 201. The portion thus diverted flows to the adsorption dryer 102 through the valve 200, passes through the valve 205, and is then sucked through the suction flow passage of the ejector manifold 107, where it is mixed with the hot and humid compressed gas 300 from the main flow passage. By causing this portion of the dried gas 301 to flow through the first adsorption dryer 102, the desiccant contained in the first adsorption dryer can be further regenerated.

[0073] exist Figure 4 , a similar situation is shown, this time showing the second drying stage 403 of the first configuration of the apparatus. Here, the dried gas 301 will first flow to the first adsorption dryer 102, and a portion will be diverted to the second adsorption dryer 103 for further regeneration of the existing desiccant, similar to the first drying stage 402.

[0074] Now refer to Figures 5 to 8 The second configuration of the device is further described.

[0075] like Figure 5 As shown, the connection of the ejector manifold in the second configuration is different from that in the first configuration. The ejector manifold 600 is still connected to the supply 100 via the main flow channel, but this time it is before the valve 204 from a fluid dynamics point of view. The suction flow channels 801, 802 of the ejector manifold 600 are connected to valves 202 and 203. In addition, at point 601, three pipelines converge, one from valve 204, one from valve 205, and one from valve 207. As for the other components and parts, the operation is similar to that in the first configuration, which will be further explained below.

[0076] Figure 5 The first regeneration phase 500 of the apparatus of the second configuration is shown. Valves 200, 203, 204, 206 and 207 are closed and valves 201, 202, 205 and 208 are open.

[0077] The hot compressed gas, now shown by the labeled lines (e.g., line 700), will now flow through the main flow channel 800 of the ejector manifold 600, through the suction flow channel to the first adsorption dryer 102. It then flows to the cooler 104 and the water separator 105, and the cooled gas (shown by the line labeled 701, for example) flows to the adsorption dryer 103 for further drying, and then flows to the discharge 106.

[0078] exist Figure 6, a second regeneration stage 501 of a second configuration is shown, wherein hot gas 700 flows to the second adsorption dryer 103 for regeneration of the existing desiccant and cooled gas 701 flows to the first adsorption dryer 102 for further drying before flowing to the discharge 106 .

[0079] For the second configuration of the device, Figure 7 A first drying stage 502 is shown, Figure 8 A second drying stage 503 is shown.

[0080] The difference between the first and second configurations due to the arrangement of the ejector manifold 600 is that in the second configuration the cooled gas 701 is split immediately after the cooler 104 and the water separator 105, whereas in the first configuration this occurs only after first flowing through the adsorption dryer. In the second configuration, each adsorption dryer 102, 103 will never flow through more than 100% of the intake air supply. In the first configuration, up to 125% of the intake air volume or mass may flow through the adsorption dryers 102, 103, which should be considered in the design.

Claims

1. A device for drying gas (300, 700) wet-compressed by a compressor (101), the device comprising: A supply unit (100) adapted to supply wet compressed gas (300, 700); A first adsorption dryer (102) and a second adsorption dryer (103) adapted to be filled with desiccant; A cooler (104) and a water separator (105); A discharge portion (106) adapted to discharge the dried compressed gas (301, 701); a set of pipelines and valves (200-208); The set of pipelines and valves (200-208) are configured to allow the wet compressed gas (300, 700) to flow from the supply part (100) to the first adsorption dryer (102) and the second adsorption dryer (103), to the cooler (104) and the water separator (105), to the second adsorption dryer (103) and the first adsorption dryer (102), and to the discharge part (106) in a first regeneration stage and a second regeneration stage, respectively; and are also configured to allow the wet compressed gas (300, 700) to flow from the supply part (100) to the cooler (104) and the water separator (105), to the second adsorption dryer (103) and the first adsorption dryer (102), and to the discharge part (106) in a first drying stage (402, 502) and a second drying stage (403, 503), respectively; Features: The device also includes an ejector manifold (107, 600), the ejector manifold including a main flow channel (800) and a first suction flow channel (802) and a second suction flow channel (801), the main flow channel (800) being connected to the supply portion (100), the first suction flow channel (802) and the second suction flow channel (801) being connected to the first adsorption dryer (102) and the second adsorption dryer (103), respectively, wherein the set of pipelines and valves (200-208) is further configured to use the ejector manifold (107, 600) during the drying stage (402, 403, 502, 503) to mix a portion of the dried compressed gas (301, 701) flowing through the suction flow channels (801, 802) with the wet compressed gas (300, 700) flowing through the main flow channel (800) in the supply portion (100).

2. The device according to claim 1, wherein: The first suction flow channel (802) and the second suction flow channel (801) are respectively connected to the first adsorption dryer (102) and the second adsorption dryer (103), so that during the first drying stage (402) and the second drying stage (403), the portion of the dried compressed gas successively flows through the cooler (104) and the water separator (105), flows through the second adsorption dryer (103) and the first adsorption dryer (102) through the cooler (104) and the water separator (105), and flows through the first adsorption dryer (102) and the second adsorption dryer (103).

3. The device according to claim 2, wherein: The set of pipelines and valves (200-208) are also configured to allow the wet compressed gas (300) to flow successively to the first adsorption dryer (102) and the second adsorption dryer (103), to the first suction flow channel (802) and the second suction flow channel (801), to the cooler (104) and the water separator (108), to the second adsorption dryer (103) and the first adsorption dryer (102), and to the discharge portion (106) in the first regeneration stage (400) and the second regeneration stage (401) (300).

4. The device according to claim 1, wherein: The first suction flow channel (802) and the second suction flow channel (801) are respectively connected to the first adsorption dryer (102) and the second adsorption dryer (103), so that during the first drying stage (502) and the second drying stage (503), the portion of the dried compressed gas flows successively through the cooler (104) and the water separator (105), and flows through the first adsorption dryer (102) and the second adsorption dryer (103) through the cooler (104) and the water separator (105).

5. The device according to claim 4, wherein: The set of pipelines and valves (200-208) are also configured to allow the wet compressed gas (700) to flow successively to the first suction flow channel (802) and the second suction flow channel (801), to the first adsorption dryer (102) and the second adsorption dryer (103), to the cooler (104) and the water separator (105), to the second adsorption dryer (103) and the first adsorption dryer (102), and to the discharge portion (106) in the first regeneration stage (500) and the second regeneration stage (501).

6. The device according to any of the preceding claims, further comprising a measuring module configured to determine a regeneration state of the first adsorption dryer (102) and / or the second adsorption dryer (103).

7. The apparatus of claim 6, further comprising a control module configured to control and actuate a set of valves (200-208) based on a regeneration state.

8. A method for drying gas compressed by a compressor (101) by means of a first adsorption dryer (102) and a second adsorption dryer (103), respectively, the first adsorption dryer and the second adsorption dryer each comprising a desiccant, the method comprising alternately performing a first regeneration stage (400) and a second regeneration stage (401) combined with a first drying stage (402) and a second drying stage (403), respectively, the first regeneration stage (400) and the second regeneration stage (402) (400, 401) respectively comprising the following steps in sequence: Regenerating the first adsorption dryer (102) and the second adsorption dryer (103) respectively by compressed gas (300); cooling (104) the compressed gas and separating (105) condensate from the compressed gas; The compressed gas is dried by the second adsorption dryer (103) and the first adsorption dryer (102) respectively; The drying stage (402, 403) comprises the following steps in sequence: cooling (104) the compressed gas and separating (105) the condensate to obtain cooled compressed gas (301); and The cooled compressed gas is dried by the second adsorption dryer (103) and the first adsorption dryer (102) respectively, thereby obtaining cooled and dried compressed gas; Features: Prior to the cooling step, the drying stage (402, 403) further comprises the following steps: Allowing a portion of the cooled and dried compressed gas (301) to flow through a first adsorption dryer (102) and a second adsorption dryer (103); The compressed gas (300) is mixed (107) with the portion of the cooled and dried compressed gas (301).

9. A method for drying gas compressed by a compressor (101) by means of a first adsorption dryer (102) and a second adsorption dryer (103), respectively, the first adsorption dryer and the second adsorption dryer each comprising a desiccant, the method comprising alternately performing a first regeneration stage (500) and a second regeneration stage (103) respectively combined with a first drying stage (502) and a second drying stage (503), the first regeneration stage (500) and the second regeneration stage (501) respectively successively comprising the following steps: Regenerating the first adsorption dryer (102) and the second adsorption dryer (103) respectively by compressed gas (700); cooling (104) the compressed gas and separating (105) condensate from the compressed gas; The compressed gas is dried by the second adsorption dryer (103) and the first adsorption dryer (102) respectively; The drying stage (502, 503) comprises the following steps in succession: cooling the compressed gas to obtain cooled compressed gas (701); and The cooled compressed gas is dried by the second adsorption dryer (103) and the first adsorption dryer (102) respectively, thereby obtaining cooled and dried compressed gas; Features: Prior to the cooling step, the drying stage (502, 503) further comprises the following steps: Allowing a portion of the cooled compressed gas to flow through a first adsorption dryer (102) and a second adsorption dryer (103); The compressed gas is mixed with the portion of the cooled compressed gas.

10. The method according to claim 8 or 9, wherein: The drying stage (502, 503) further comprises the following steps: The portion of the cooled compressed gas is used to regenerate the desiccants in the first adsorption dryer (102) and the second adsorption dryer (103), respectively.

11. The method according to any one of claims 8 to 10, wherein: Regeneration through the regeneration stage (400, 401, 500, 501) includes heating the desiccant using the heat of compression of the compressed gas.

12. The method according to any one of claims 8 to 11, further comprising the following steps: determining a regeneration state of the first adsorption dryer (102) and / or the second adsorption dryer (103); And wherein the alternating first regeneration stage (400, 500) and the second regeneration stage (401, 501) respectively combined with the first drying stage (402, 502) and the second drying stage (403, 503) is based on the regeneration state.

13. An ejector manifold (107, 600) suitable for use in an apparatus according to any one of claims 1 to 7 and / or in a method according to any one of claims 8 to 12 for mixing compressed gas with a portion of cooled compressed gas.

14. Use of an injector manifold (107, 600) according to claim 13.

15. A compressor unit comprising a compressor (100) having an outlet connected to an inlet of an apparatus according to any one of claims 1 to 7.

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