Compressed gas processing plant

Abstract

Compressed gas conditioning plant (100) for conditioning compressed gas, with an inlet (104) for connecting a compressed gas source (106) and an outlet (52) for providing conditioned compressed gas, wherein the inlet (104) and the outlet (52) are flow-connected and a humidification device (116) for humidifying the compressed gas is arranged in the flow connection (108), characterized in that the compressed gas conditioning plant (100) has a heating device (50) for heating a liquid, wherein the heating device (50) has a supply connection (58) for supplying heated liquid and a return connection (60) for feeding back recycled liquid.

Description

[0001] The invention relates to a compressed gas treatment plant for treating compressed gas with the features of the preamble of claim 1.

[0002] Devices of the type mentioned above are known from the prior art, for example from DE 10 2018 118 206 A1. The device described therein enables the provision of conditioned compressed gas to a consumer, whereby the compressed gas is humidified before its provision.

[0003] With such a device, improved spray results can be achieved, especially under ideal conditions. However, the problem is that the compressed gas, for example, carried in a compressed gas line, is subject to the influence of ambient conditions (air pressure and temperature). This can lead to undesirable heating or cooling of the compressed gas line and the compressed gas, so that the humidified compressed gas can condense in the compressed gas line. This results in the risk of droplet formation. Solutions using electrical heating coils for hose arrangements are only suitable for special applications, whereby use in explosion-protected areas ("Ex-protection areas") is problematic and may not be possible at all. In this respect, there is a need for optimization.

[0004] DE 27 25 639 A1 discloses a device in which compressed air is heated and moistened as it flows over moist sand and then enters a heating hose, which is preferably heated by electrical resistance heaters.

[0005] EP 3 527 653 A1 discloses a device for humidifying test gas under pressure of up to 1.5 bar, where the water for humidification is provided in a storage container and a temperature control device is present, which can be a heating hose, in order to temper the pressurized gas to a temperature above the dew point.

[0006] The invention is based on the object of enabling the provision of compressed gas of high and consistent quality in a compressed gas treatment system using simple design means. It is desirable that condensation and droplet formation of humidified compressed gas can be avoided.

[0007] The invention solves this problem by a compressed gas treatment plant with the features of claim 1.

[0008] The compressed gas treatment system is used to treat compressed gas. The compressed gas treatment system has an inlet for connecting a compressed gas source and an outlet for providing treated compressed gas, e.g., for a spray device. The inlet and outlet are fluidically connected, and a humidification device ("mixing chamber") for humidifying the compressed gas using a liquid, e.g., demineralized water, is located in the flow connection.

[0009] The compressed gas treatment system is characterized in that the compressed gas treatment system has a heating device for heating a liquid (heat transfer medium), wherein the heating device has a flow connection for discharging heated liquid and a return connection for feeding in returned liquid.

[0010] This allows for the provision of compressed gas as well as a heated liquid, which can be used to control the temperature of the compressed gas. A hose arrangement with a compressed gas line and a fluid line for controlling the temperature of the compressed gas can be connected to the compressed gas conditioning system (hose heating). This creates a liquid-based hose heating system. The risk of condensation and droplet formation in the compressed gas line is significantly reduced. Adequate explosion protection can be achieved. The high and consistent quality of the compressed gas enables better spraying results, for example, a better coating or painting finish.

[0011] Advantageously, the supply connection, the return connection, and the outlet can be arranged next to or adjacent to each other in a connection area of ​​the compressed gas treatment system (on the outlet side) designed as a connection terminal. This can facilitate handling by creating a "connection terminal."

[0012] Within the scope of a preferred embodiment, a hose arrangement ("hose package") can be provided for (output-side) connection to the compressed gas treatment system, wherein the hose arrangement has a compressed gas line and a fluid line for controlling the temperature of the compressed gas line (or of the compressed gas contained in the compressed gas line). The fluid line is arranged on or in the compressed gas line and extends along the compressed gas line. This allows for (liquid-based) hose heating, whereby the risk of condensation and droplet formation can be reduced. This favors, for example, a coating result. The compressed gas line is provided for connection to the outlet, and the fluid line is provided for connection to the supply connection and the return connection of the compressed gas treatment system.

[0013] The compressed gas line (at the connection end) can conveniently have a connection element for connecting to the outlet of the compressed gas treatment system (compressed gas connection). This allows the compressed gas line to be easily connected to the outlet. Optionally, the compressed gas line can also have a connection element at the free end. This allows a consumer, such as a coating gun, to be connected to the free end of the compressed gas line. The connection element can be a coupling plug, a coupling, or a screw connection.

[0014] Regardless, the fluid line can have a first connection element (at one end) for connecting to the flow connection and a second connection element (at the other end) for connecting to the return connection of the heating device. This allows for easy connection of the fluid line. The connection element can be a coupling plug, a coupling, or a screw connection.

[0015] Within the scope of a preferred embodiment, the compressed gas line and the fluid line can be routed one inside the other (line within line or pipe within pipe). In other words, one line can be arranged radially inside the other line, whereby the central longitudinal directions of the lines can be arranged parallel or coaxially to one another. The compressed gas line can be arranged radially inside the fluid line, or the fluid line can be arranged radially inside the compressed gas line. This allows for a material-saving design, since the line lengths of the compressed gas line and the fluid line can be approximately equivalent. Furthermore, sufficient explosion protection can be achieved.

[0016] Alternatively, the compressed gas line can extend along a longitudinal direction (e.g., the central longitudinal direction), and the fluid line can be routed helically on or within the compressed gas line, at least in sections. This allows for a structurally simple design, since commercially available hoses can be used for the compressed gas line and the fluid line, for example, and the hose arrangement can be formed from these. The helical routing of the fluid line allows for a more flexible design of the hose arrangement overall. The greater length of the fluid line compared to the compressed gas line allows for large amounts of heat to be transferred. The fluid line preferably has a smaller diameter than the compressed gas line.

[0017] Advantageously, the fluid line can have a leading section and a returning section, wherein the leading section extends from the connection-side end, in particular from the first connection element, along, in particular parallel, the compressed air line to the free end of the compressed air line, and wherein the returning section extends helically (heating coil) on or in the compressed gas line to the connection-side end, in particular to the second connection element. In this way, the area at the free end of the hose arrangement is heated the most, since fluid heated via the leading section is guided quite quickly to the free end and from there (gradually) back to the connection-side end through the helical winding.

[0018] The forward section merges into the return section at a reversal point. The reversal point is preferably located as close as possible to the free end of the compressed gas line or hose assembly.

[0019] The helical winding can in particular be designed as a helix, which increases with a predetermined pitch (pitch) per winding or revolution.

[0020] Within the scope of a preferred embodiment, the fluid line or the return section can have multiple regions in which the helical windings are wound with different densities. In other words, the coil can have multiple regions in which the pitch or pitch of the coil varies. For example, the helical winding can have a first pitch in a first region and a second pitch in a second region that is greater than the first pitch. Thus, different temperature zones can be formed by varying the winding density along the compressed gas line.

[0021] Advantageously, the fluid line or the return section at the free end of the compressed gas line can have a region where the helical winding has the highest density, thus having the smallest pitch. This creates a temperature zone with the highest temperature at the free end. This minimizes the risk of condensation in the compressed gas line at the free end.

[0022] Advantageously, the heating device can comprise a heating element, a pump, a vent, and / or a pressure equalization element (pressure equalization tank). The heating element can heat the carrier medium (liquid, e.g., water) in the supply unit. The heating element can be designed as an electric heating element, a heat pump heating system, a wood heating system (wood chips or pellets), or a solar heating system. The pump serves to drive or circulate the carrier medium. Pressure equalization can be achieved through the pressure equalization element.

[0023] The return connection and the supply connection are fluidically connected. One or more of the aforementioned components (heating element, pump, vent, and / or pressure compensation element) can be arranged in the fluid connection. Independently of this, the supply unit can have a fluid supply that feeds an injection point located in the compressed gas line of the hose assembly.

[0024] A control system for the compressed gas treatment system can be expediently provided. This enables control, regulation, and / or monitoring of the compressed gas treatment system. Switches, sensors, and / or actuators contained in the compressed gas treatment system can be connected to the control system wirelessly (radio, Wi-Fi, or Bluetooth) or wired (electrical or electronic connection).

[0025] In a preferred embodiment, the humidification device can be supplied with liquid via a (pressurized) liquid reservoir, wherein the pressure conditioning system is configured such that when no compressed gas is drawn off at the outlet (compressed gas connection), the liquid supply to the humidification device is stopped. This counteracts excessive humidification of the compressed gas. This reduces the risk of condensation and droplet formation downstream of the humidification unit. The compressed gas conditioning system can be configured such that when compressed gas is drawn off at the outlet (compressed gas connection), the liquid supply to the humidification device is activated.

[0026] A flow switch can be conveniently arranged in the flow connection (the flow connection between the inlet and outlet) to detect whether compressed gas is being drawn at the outlet. The flow switch can be installed upstream of the humidification device. It can detect a flow in the section of the flow connection between the inlet and the humidification device (dry gas line). The flow switch can be connected to the control system of the compressed gas treatment system via a wireless or wired connection.

[0027] Specifically, a valve, e.g., a proportional valve, can be connected between the liquid reservoir and the humidification device, by means of which the liquid supply to the humidification device can be regulated. This implements the control of the liquid supply. The valve preferably has an electrically or electronically controllable actuator by means of which the valve can be actuated. The valve or actuator can be connected to the control system of the compressed gas treatment system via a wireless or wired connection. Thus, the valve can be controlled (actuated) depending on the flow determined at the flow switch.

[0028] Within the scope of a preferred embodiment, a temperature and / or humidity sensor can be provided, which is arranged outside a housing of the pressure processing system and is connected wirelessly or wired to the control system of the pressure processing system. Using this sensor, the temperature and / or humidity prevailing outside the pressure processing system can be measured and transmitted as a signal to the control system. In addition to the weather, the season can also be taken into account. The sensor can be connected wirelessly or wired to the control system. The control system can be configured such that the signals detected by the sensor ("atmospheric situation") serve as a controlled variable for the control system.

[0029] Advantageously, a temperature and / or humidity sensor can be arranged in the compressed gas line of the hose assembly, which is connected wirelessly or wired to the control system of the compressed gas treatment system. This allows temperature and / or humidity to be measured directly in the hose and transmitted wirelessly or wired, for example, to a control system of a supply unit. Since the risk of condensation increases with the length of the line, it is advantageous if the temperature and / or humidity sensor is arranged in the front third (at the free end) of the compressed gas line or hose assembly.

[0030] A droplet separator can advantageously be installed in the compressed gas line of the hose assembly. This prevents the undesirable release of liquid droplets by capturing them in the droplet separator. It is advantageous to position the droplet separator, if possible, in the front third of the compressed gas line (located at the free end). For handling reasons, it is preferable to position the droplet separator approximately 60 to 100 centimeters from the free end of the compressed gas line. Optionally, the droplet separator can have a viewing window for visual inspection.

[0031] In a preferred embodiment, an injection point for injecting heated liquid, in particular hot water, can be arranged in the compressed gas line of the hose arrangement. This allows humidification of the compressed gas directly in the compressed gas line. This further reduces the risk of condensation. The injection point can be fed by a liquid supply, which is assigned, for example, to a supply unit arranged upstream of the compressed gas line. The injection point can optionally have an atomizing nozzle. For a structurally simple design, the injection point can be integrated into the compressed gas line by means of a T-piece (T-shaped pipe section).

[0032] The compressed gas source connected to the inlet of the compressed gas treatment system can be a compressed gas supply (e.g., a compressed gas tank) or a compressor. A filter unit and / or a pressure regulator, particularly a manual pressure regulator, can be connected upstream of the inlet (inlet-side connection) of the flow connection.

[0033] An inlet-side pressure sensor can also be connected to the inlet (inlet-side connection) of the flow connection, which measures the inlet pressure of the compressed gas treatment system.

[0034] A branch can be provided between the inlet (inlet-side connection) of the flow connection and the humidification device, at which the flow connection branches into a first line branch (dry gas line) and a second line branch (humidification line).

[0035] The flow switch described above can be arranged in the first line branch (dry gas line). A control valve, in particular a proportional valve, can be arranged in the second line branch (humidification line), which regulates the pressure prevailing in this line to a level slightly higher than that in the first line branch, in particular by +0.5 bar. The liquid reservoir described above can be arranged in the second line branch (humidification line), which can be filled with a liquid, in particular water, preferably demineralized water. The liquid reservoir is pressurized (second line branch) and can therefore be referred to as a "pressure vessel."

[0036] One or more inlets can lead from the second line branch into the humidification device. An atomizing nozzle can be arranged at each inlet(s) to improve the atomization of the liquid. The humidification device can also be referred to as a "mixing chamber," since it is there that the (relatively) dry compressed gas from the first line branch (dry gas line) and the humidified compressed gas from the second line branch (humidification line) are mixed.

[0037] At the humidification unit, the first branch (dry gas line) and the second branch (humidification line) are joined. Another section of the flow connection leads to the outlet of the compressed gas treatment system.

[0038] A heater can be installed upstream of the humidification device to regulate the temperature of the compressed gas. A temperature and / or humidity sensor can also be installed on or downstream of the heater. This sensor and the heater can be connected to the control system of the compressed gas treatment system. This allows the control system to regulate the heater output based on the temperature and / or humidity measured by the temperature and / or humidity sensor.

[0039] At the outlet, i.e. at the outlet end of the flow connection of the compressed gas treatment system, a connection area, in particular a connection terminal, can be provided in which the outlet (compressed gas outlet), the flow connection and / or the return connection are arranged.

[0040] The hose arrangement described above can be connected to the outlet, the supply connection, and the return connection. A receiver of the humidified compressed gas, such as a coating gun, can be connected downstream to the hose arrangement.

[0041] The compressed gas treatment system may comprise a housing, for example a box or a cabinet, in particular made of metal, in which at least a large part of the components of the compressed gas treatment system are accommodated.

[0042] The invention is explained in more detail below with reference to the figures, in which identical or functionally equivalent elements are provided with identical reference numerals, if necessary, but only once. They show: Fig. 1 shows an embodiment of a compressed gas treatment system with a hose arrangement connected thereto in a schematic view; and Fig. 2 the hose arrangement of the compressed gas system Fig. 1 in an enlarged view.

[0043] Fig. Figure 1 shows a compressed gas treatment system for processing compressed gas, designated overall by reference numeral 100. A hose assembly 11 is connected to the compressed gas treatment system 100.

[0044] The compressed gas treatment system 100 has a housing 102 in which a majority of the components of the compressed gas treatment system 100 are arranged.

[0045] The compressed gas treatment system 100 has an inlet 104 to which a compressed gas source 106 can be connected, for example, a compressor 106. Furthermore, the compressed gas treatment system 100 has an outlet 52 for providing treated compressed gas, for example, to a spray device 38 connected to the hose device 11, in particular a coating gun 38.

[0046] The inlet 104 and the outlet 52 are fluidly connected to each other by a flow connection 108. This is explained below. The compressed gas treatment system 100 has a controller 109, which serves to control, regulate, and / or monitor components of the compressed gas treatment system 100. Sensors, actuators, switches, or the like can be connected to the controller 109 (only partially shown in the figure for reasons of clarity).

[0047] A filter unit 110 and / or a preferably manual pressure regulator 112 can optionally be connected upstream of the inlet 104 of the compressed gas treatment system 100. A pressure sensor 114 is connected to the inlet 104 (inlet-side connection 104), which detects the inlet pressure prevailing at the inlet 104. The pressure sensor 114 is connected wirelessly or by wire to the controller 109 (not shown).

[0048] Between the inlet 104 and a humidification device 116 arranged in the flow connection 108, a branch 118 is provided, at which the flow connection 108 branches into a first line branch 120 (dry gas line 120) and a second line branch (humidification line 122).

[0049] A flow switch 122 is arranged in the first line branch 120 and determines whether compressed gas is being drawn at the outlet 52. To do so, the flow switch 122 detects the flow prevailing in the first line branch 120. The flow switch 122 is connected wirelessly or wired to the controller 109 (not shown).

[0050] A heater 124 is provided in the first line branch 120 to control the temperature of the compressed gas flowing in this line branch. After passing through the heater 124, the line branch opens into the heating device 116 (mixing chamber 116).

[0051] The heater 124 can also be connected to the controller 109 wirelessly or wired (not shown).

[0052] A control valve 126, in particular a proportional valve 126, is arranged in the second line branch 122 (humidification line 122). The control valve 126 regulates the pressure prevailing in the second line branch 122 to a pressure level slightly higher than that in the first line branch 120, for example, by +0.5 bar. The control valve 126 can be connected to the controller 109 wirelessly or by wire (not shown).

[0053] A liquid reservoir 128 filled with a liquid, e.g., demineralized water, is also arranged in the second line branch 122. The liquid reservoir 128 is also pressurized due to the pressure prevailing in the second line branch 122.

[0054] Furthermore, a valve 130 is arranged in the second line branch 122, by means of which the flow can be regulated. The valve 130 can have a controllable actuator (not shown) by means of which the valve 130 can be actuated. The valve 130 or its actuator can be connected wirelessly or by wire to the controller 109 (not shown). The controller 109 can control the flow by controlling the valve 130 or its actuator, in particular depending on the flow determined by the flow switch 122.

[0055] One or more inlets 132 lead from the second line branch 122 into the humidification device 116. An atomizing nozzle (not shown) can be arranged at each of the inlets 132 to improve the atomization of the liquid. In the humidification device 116, the (relatively) dry compressed gas from the first line branch 120 and the humidified compressed gas from the second line branch 122 are mixed together.

[0056] A further section 134 of the flow connection 108 leads from the humidification device 116 to the outlet 52. In section 134, a pressure and / or temperature sensor 136 is provided, which detects the pressure and / or temperature downstream of the humidification device 116 and is connected to the controller 109 by means of a wireless or wired connection 138.

[0057] In addition, a pressure and / or temperature sensor 140 is provided outside the compressed gas treatment system 100, in particular outside the housing 102, which is connected to the controller 109 by means of a wireless or wired connection 142.

[0058] The compressed gas treatment system 100 has a heating device 50 for heating a liquid. The heating device 50 has a supply connection 58 for discharging heated liquid and a return connection 60 for feeding in recirculated liquid. The supply connection 58, the return connection 60, and the outlet 52 are arranged adjacent to one another in a common connection area 61.

[0059] The hose assembly 11 has a connection-side end 12 and a free end 14. The hose assembly 11 has a compressed gas line 16 and a fluid line 22 (in Fig. 1 is shown only schematically). The fluid line has a leading section 30 and a returning section 32, 32'. A droplet separator 40 with a viewing window 42 is arranged in the compressed gas line 16 near the free end 14.

[0060] The hose arrangement 11 is described below using Fig. 2 is explained in more detail.

[0061] As already explained, the hose assembly 10 has a connection-side end 12 and a free end 14. At the connection-side end 12, the hose assembly 10 can be connected to the compressed gas treatment system 10. At the free end 14, a compressed gas-consuming component can be connected to the hose assembly 10, for example, a coating gun 38 (see Fig. 1).

[0062] The hose assembly 10 includes the compressed gas line 16, by means of which a compressed gas can be guided from the connection-side end 12 to the free end 14. The compressed gas line 16 has a connection element 18, for example, a coupling plug, at the connection-side end 12 and another connection element 20, for example, a coupling, at the free end 14.

[0063] The hose assembly 10 also includes the fluid line 22 for tempering or heating the compressed gas line 16. In the exemplary embodiment, the fluid line 22 is arranged on the compressed gas line 16 and extends along the compressed gas line 16 (another arrangement of the fluid line 22 is also conceivable; see above).

[0064] The fluid line 22 has a first connection element 24 at one end and a second connection element 26 at the other end, each for connection to the heating device 50. The first connection element 24 and the second connection element 26 are both arranged at the same end of the compressed gas line 16 or the hose assembly 10, namely at the connection-side end 12.

[0065] In the exemplary embodiment, the compressed gas line 16 extends along a (not shown) longitudinal direction 28 and the fluid line 22 is guided in sections in a spiral shape along the compressed gas line 16.

[0066] The fluid line 22 has a leading section 30 and a returning section 32, 32'. The leading section 30 extends from the first connection element 24 to the free end 14 of the compressed gas line 16. The leading section 30 runs, at least largely, along or parallel to the compressed gas line 16 toward the free end 14 of the compressed gas line 16. At a reversal point 34, the leading section 30 merges into the returning section 32, 32'.

[0067] The return section 32, 32' extends helically from the free end 14 of the compressed gas line 16 to the connection-side end 12, specifically up to the second connection element 26. The return section 32, 32' forms, so to speak, a (liquid-fed) heating coil, by means of which the compressed gas line 16 or the compressed gas contained therein can be tempered. For this purpose, a tempered liquid, for example, tempered, possibly demineralized, water, can circulate in the fluid line 16.

[0068] The fluid line 16 or the return section 32, 32' has several regions 34, 34' in which the helical windings are wound with varying densities. Thus, the return section 32, 32' at the free end of the compressed air line 16 has a region 34 in which the helical winding has the highest density.

[0069] For example, in region 34, the helical windings are directly adjacent to one another, whereas in region 34' the helical windings are spaced apart. Thus, a higher-temperature zone forms in region 34, and a lower-temperature zone forms in region 34'.

[0070] Optionally, a temperature and / or humidity sensor, a droplet separator and / or an injection point for injecting heated liquid (each not shown) may be arranged in the pressure gas line 16, as described above.

[0071] At the connection area 61, compressed gas can be provided (through the compressed gas treatment system 10 and its outlet 52) ​​on the one hand and thermal energy for liquid-based heating (liquid serves as a carrier medium) of the hose arrangement 10 or the compressed gas line 16 on the other.

[0072] A flow connection 58 for discharging heated fluid and a return connection 60 for feeding recirculated fluid are provided on the heating device 50 or in the connection area 61. The flow connection 58, the return connection 60, and the outlet 52 are arranged adjacent to one another in the connection area 61.

[0073] The flow connection 58 and the return connection 60 are connected by a flow connection 62. A heating element 64 and a pump 66 are arranged in the flow connection 62. Furthermore, the fluid in the flow connection 62 can be heated (heating element 64) and circulated (pump 66). Optionally, a vent, a pressure equalization element, and / or a control system for the heating device 50 can be provided (not shown), as explained above.

[0074] The flow connection 62 and the components arranged in the flow connection 62 between the flow connection 58 and the return connection 60 form part of a heating circuit. The fluid line 22 forms another part of the heating circuit. If the first connection element 24 is connected to the flow connection 58 and the second connection element 26 is connected to the return connection 60, the heating circuit is closed. The compressed gas line 16 or the compressed gas arranged therein can then be tempered.

Claims

[1] Compressed gas processing system (100) for processing compressed gas, having an inlet (104) for connecting a compressed gas source (106) and an outlet (52) for providing processed compressed gas, wherein the inlet (104) and the outlet (52) are fluidically connected and a humidification device (116) for humidifying the compressed gas is arranged in the flow connection (108), characterized by that the compressed gas treatment plant (100) has a heating device (50) for heating a liquid, wherein the heating device (50) has a flow connection (58) for discharging heated liquid and a return connection (60) for feeding in returned liquid. [2] Compressed gas treatment plant (100) according to claim 1, characterized by that the flow connection (58), the return connection (60) and the outlet (52) are arranged next to one another in a connection area (61) designed as a connection terminal. [3] Compressed gas treatment plant (100) according to claim 1 or 2, characterized by a hose arrangement (11) for connection to the compressed gas processing system (100), wherein the hose arrangement (10) has a compressed gas line (16) for connection to the outlet (52) and a fluid line (22) for tempering the compressed gas line (16) and for connection to the flow connection (58) and the return connection (60), wherein the fluid line (22) is arranged on or in the compressed gas line (16) and extends along the compressed gas line (16). [4] Compressed gas treatment plant (100) according to claim 3, characterized by that the compressed gas line (16) has a connection element (18) for connection to the outlet (52) of the compressed gas processing system (100) and / or that the fluid line (22) has a first connection element (24) for connection to the flow connection (58) and a second connection element (26) for connection to the return connection (60) of the heating device (50). [5] Compressed gas treatment plant (100) according to claim 3 or 4, characterized by that the compressed gas line (16) and the fluid line (22) are guided into one another or that the compressed gas line (16) extends along a longitudinal direction (28) and the fluid line (22) is guided at least in sections in a helical manner on or in the compressed gas line (16). [6] Compressed gas processing plant (100) according to one of claims 3 to 5, characterized by in that the fluid line (22) has a leading section (30) and a returning section (32, 32'), wherein the leading section (30) extends from the connection-side end (12) along the compressed air line (16) to the free end (14) of the compressed air line (16), and wherein the returning section (32, 32') extends helically on or in the compressed gas line (16) to the connection-side end (12). [7] Compressed gas processing plant (100) according to one of claims 3 to 6, characterized bythat the fluid line (22) or the returning section (32, 32') has a plurality of regions (34, 34') in which the pitch of the helical windings is of different sizes. [8] Compressed gas processing plant (100) according to one of claims 3 to 7, characterized by that the fluid line (22) or the return section (32, 32') at the free end (14) of the compressed gas line (16) has a region (34') in which the helical winding has the highest density. [9] Compressed gas processing plant (100) according to one of the preceding claims, characterized by that the heating device (50) has a heating element (64), a pump (66), a vent and / or a pressure compensation element. [10] Compressed gas processing plant (100) according to one of the preceding claims, characterized by that a control (109) is provided for the compressed gas treatment plant (100). [11] Compressed gas treatment plant (100) according to claim 10, characterized by that the humidification device (116) is fed with liquid by means of a liquid reservoir (128), wherein the compressed gas processing system (100) is designed such that when no compressed gas is withdrawn at the outlet (52), the liquid supply to the humidification device (116) is stopped. [12] Compressed gas processing plant (100) according to one of the preceding claims, characterized by that a flow switch (122) is arranged in the flow connection (108), which determines whether compressed gas is being withdrawn at the outlet (52), and / or that a valve (130) is connected between the liquid reservoir (128) and the humidification device (116), by means of which the liquid supply can be regulated. [13] Compressed gas processing plant (100) according to one of the preceding claims, characterized bythat a temperature and / or humidity sensor (140) is provided, which is arranged outside a housing (102) of the compressed gas treatment system (100) and is connected wirelessly or by wire to the controller (109). [14] Compressed gas processing plant (100) according to one of the preceding claims, characterized by that a temperature and / or humidity sensor is arranged in the compressed gas line (16) of the hose arrangement (10), which is connected wirelessly or by wire to the controller (109). [15] Compressed gas processing plant (100) according to one of the preceding claims, characterized by that a droplet separator (40) is arranged in the compressed gas line (16) of the hose arrangement (10). [16] Compressed gas processing plant (100) according to one of the preceding claims, characterized bythat one or more injection points for injecting heated liquid, in particular hot water, are arranged in the compressed gas line (16) of the hose arrangement (10), wherein the injection point or the injection points are fed by means of a liquid supply.

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