Gas drying system and gas compression system

Abstract

The invention provides a gas drying system and a gas compression system.The gas drying system comprises a drying device, a first temperature sensor and a second temperature sensor, the drying device comprises a shell and a rotary drum, a drying space and a regeneration space are formed in the shell, a drying agent is arranged in the rotary drum, the rotary drum is rotatably arranged in the shell, and the first temperature sensor and the second temperature sensor are arranged in the shell; the drying agent can be driven to sequentially pass through the drying space and the regeneration space; the first temperature sensor and the second temperature sensor are arranged at different positions of the regeneration space, and the first temperature sensor and the second temperature sensor are used for detecting the temperatures of the different positions of the regeneration space respectively. The gas drying system can accurately monitor the regeneration condition of the drying agent, so that the regeneration effect of the drying agent and the energy consumption of the system can be considered.

Description

Technical Field

[0001] The present application relates to the technical field of gas drying, and in particular to a gas drying system and a gas compression system. Background Art

[0002] Adsorption gas dryers usually use desiccant to dry the gas to be dried. As the desiccant continues to adsorb for a longer time and the amount of water adsorbed increases, the adsorption effect of the adsorbent will gradually decrease. Therefore, the adsorbent needs to be regenerated regularly to maintain the adsorption efficiency of the adsorbent and thus maintain the drying effect. On this basis, the desiccant regeneration process is directly related to the subsequent gas drying effect and the energy consumption of the dryer. However, the conventional adsorption gas dryer has poor monitoring accuracy for the desiccant regeneration process, and there is still room for improvement in terms of balancing the desiccant regeneration effect and the energy consumption of the dryer. Summary of the invention

[0003] In view of the above-mentioned problems existing in the prior art, the present application provides a gas drying system and a gas compression system. The technical solution provided by the present application is as follows.

[0004] The first aspect of the present application provides a gas drying system, comprising:

[0005] The drying device comprises a shell and a drum, wherein the shell has a drying space and a regeneration space, the drum is provided with a desiccant, and the drum is rotatably arranged in the shell to drive the desiccant to pass through the drying space and the regeneration space successively;

[0006] The first temperature sensor and the second temperature sensor are arranged at different positions of the regeneration space, and the first temperature sensor and the second temperature sensor are respectively used to detect the temperatures at different positions of the regeneration space.

[0007] In some embodiments, the first temperature sensor and the second temperature sensor are respectively disposed at different positions of the regeneration space in the first direction and / or at different positions in the second direction;

[0008] The first direction is the rotation direction of the drum, and the second direction is the rotation centerline direction of the drum.

[0009] In some embodiments, the drying space is formed by an inner cavity of the shell located within a first central angle range, and the regeneration space is formed by an inner cavity of the shell located within a second central angle range;

[0010] Wherein, the vertex of the first central angle and the vertex of the second central angle are located on the rotation center line of the drum.

[0011] In some embodiments, the first temperature sensor and the second temperature sensor are respectively located on both sides of a target plane, where the target plane is a plane defined by the angular bisector of the second central angle and the rotation center line of the drum.

[0012] In some embodiments, there is a first included angle between the first temperature sensor and the target plane, and a second included angle between the second temperature sensor and the target plane. The vertices of both the first included angle and the second included angle are located on the rotation center line of the drum, and the ratio of the angle of the first included angle to the angle of the second included angle is from 0.5 to 1.

[0013] In some embodiments, there is a third included angle between the first temperature sensor and the second temperature sensor. The vertex of the third included angle is located on the rotation center line of the drum, and the angle of the third included angle is from 50° to 80°.

[0014] In some embodiments, the distance between the first temperature sensor and the second temperature sensor in the second direction is from 0 cm to 15 cm.

[0015] In some embodiments, the housing is provided with a plurality of detection holes penetrating through to the regeneration space, and the first temperature sensor and the second temperature sensor respectively extend from one of the detection holes into the space between the inner circumference of the housing and the outer circumference of the drum.

[0016] In some embodiments, it further includes:

[0017] A controller configured to control the working load of the drying device based on the detection results of the first temperature sensor and the second temperature sensor.

[0018] In some embodiments, the controller is specifically configured to:

[0019] Control the rotation speed of the drum based on the detection results of the first temperature sensor and the second temperature sensor.

[0020] In some embodiments, the controller is specifically configured to:

[0021] Determine an equivalent temperature capable of identifying the temperature state of the regeneration space based on the detection results of the first temperature sensor and the second temperature sensor;

[0022] Control the rotation speed of the drum based on the equivalent temperature.

[0023] In some embodiments, the controller is specifically configured to:

[0024] When the equivalent temperature meets the first temperature range, reduce the rotational speed of the drum; the first temperature range is used to characterize that the supply amount of the regeneration gas in the regeneration space is greater than the demand amount of the regeneration gas for the desiccant regeneration;

[0025] When the equivalent temperature meets the second temperature range, increase the rotational speed of the drum; the second temperature range is used to characterize that the supply amount of the regeneration gas in the regeneration space is less than the demand amount of the regeneration gas for the desiccant regeneration.

[0026] In some embodiments, the gas drying system further includes a mixing device, one air inlet of the mixing device is used to receive the gas to be dried; the other air inlet of the mixing device is connected to the air outlet of the regeneration space and is used to receive the wet regeneration gas from the regeneration space; the air outlet of the mixing device is connected to the air inlet of the drying space, and the mixing device is used to transport the mixed gas formed by mixing the gas to be dried and the wet regeneration gas to the drying space; the controller is specifically configured to:

[0027] Based on the detection results of the first temperature sensor and the second temperature sensor, control the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas.

[0028] In some embodiments, the gas drying system further includes a third temperature sensor, and the third temperature sensor is used to detect the inlet temperature of the drying space; the controller is specifically configured to:

[0029] Based on the detection results of the first temperature sensor, the second temperature sensor, and the third temperature sensor, control the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas.

[0030] In some embodiments, the gas drying system further includes a first valve, a second valve, and / or a third valve;

[0031] The first valve is arranged at one air inlet of the mixing device and is used to adjust the flow rate of the gas to be dried;

[0032] The second valve is arranged between the other air inlet of the mixing device and the air outlet of the regeneration space and is used to adjust the flow rate of the wet regeneration gas;

[0033] The third valve is arranged between the air outlet of the mixing device and the air inlet of the drying space and is used to adjust the flow rate of the mixed gas;

[0034] The controller is specifically configured to:

[0035] Based on the detection results of the first temperature sensor and the detection results of the second temperature sensor, the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas are regulated by using the first valve, the second valve and / or the third valve.

[0036] In some embodiments, the gas drying system further comprises a heating device, the gas outlet of the heating device is connected to the gas inlet of the regeneration space, and the heating device is used to heat the regeneration gas; the controller is specifically used to:

[0037] Based on the detection result of the first temperature sensor and the detection result of the second temperature sensor, the power of the heating device is regulated to regulate the intake air temperature of the regeneration space.

[0038] A second aspect of the present application provides a gas compression system, comprising a compressor unit and the gas drying system as described above; the gas outlet of the compressor unit is connected to the gas inlet of the gas drying system, the compressor unit is used to prepare compressed gas, and transport the compressed gas as gas to be dried to the gas drying system.

[0039] The gas drying system of the embodiment of the present application is provided with a first temperature sensor and a second temperature sensor at different positions of the regeneration space, respectively. The first temperature sensor and the second temperature sensor can detect the temperature at different positions of the regeneration space, and can avoid a large deviation between the detection result and the actual temperature due to the temperature sensor itself or the uneven distribution of the regeneration airflow. Based on the detection results of the first temperature sensor and the second temperature sensor, it is possible to accurately determine whether the regeneration process of the desiccant meets the design expectations, so as to accurately monitor the regeneration status of the desiccant, thereby taking into account both the desiccant regeneration effect and the system energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the three-dimensional structure of a drying device according to an embodiment of the present application;

[0041] Figure 2 A schematic diagram of the top view of the drying device according to an embodiment of the present application;

[0042] Figure 3 It is a side view structural schematic diagram of the drying device of an embodiment of the present application;

[0043] Figure 4 This is a schematic diagram of a gas compression system according to an embodiment of the present application.

[0044] Description of reference numerals:

[0045] 10 - Gas drying system; 11 - Drying device; 12 - Housing; 13 - Drying space; 14 - Regeneration space; 15 - First temperature sensor; 16 - Second temperature sensor; 17 - Third temperature sensor; 18 - Mixed flow device; 19 - Four - stage cooling device;

[0046] 20 - Compressor unit; 21 - First - stage compressor; 22 - First - stage cooling device; 23 - Second - stage compressor; 24 - Second - stage cooling device; 25 - Third - stage compressor; 26 - Heat exchanger; 27 - Third - stage cooling device. Detailed implementation manners

[0047] To enable those skilled in the art to better understand the technical solutions of the embodiments of the present application, the present application will be described in detail below with reference to the accompanying drawings and specific implementation manners.

[0048] The embodiments of the present application provide a gas drying system. Referring to Figures 1 to 4 As shown, the gas drying system 10 of the embodiments of the present application may specifically include a drying device 11, a first temperature sensor 15, and a second temperature sensor 16.

[0049] The drying device 11 includes a housing 12 and a drum (not shown in the figure). The housing 12 has a drying space 13 and a regeneration space 14 therein. A desiccant is provided in the drum, and the drum is rotatably provided in the housing 12 so as to be able to drive the desiccant to successively pass through the drying space 13 and the regeneration space 14.

[0050] The first temperature sensor 15 and the second temperature sensor 16 are arranged at different positions in the regeneration space 14, and the first temperature sensor 15 and the second temperature sensor 16 are respectively used to detect the temperatures at different positions in the regeneration space 14.

[0051] Specifically, the housing 12 has an inner cavity. A part of the inner cavity forms the drying space 13, and another part of the inner cavity forms the regeneration space 14. The drum is rotatably provided in the inner cavity, and during the rotation of the drum, it can drive the desiccant to successively pass through the drying space 13 and the regeneration space 14. The drying space 13 is used to dry the gas to be dried by the desiccant in the drum. The regeneration space 14 is used to regenerate the desiccant in the drum by the regeneration gas.

[0052] It should also be noted that the inner cavity includes the drying space 13 and the regeneration space 14, but the inner cavity is not limited to only including the drying space 13 and the regeneration space 14. The inner cavity may also include, for example, a cooling space for cooling the desiccant and / or a heating space for heating the desiccant, etc.

[0053] Optionally, the drum can be connected to a driving device via a transmission mechanism, and the driving device can be configured to drive the drum to rotate via the transmission mechanism. For example, the drum can be connected to a motor disposed at the top, bottom or side of the housing 12 via a transmission mechanism.

[0054] Optionally, the first temperature sensor 15 and the second temperature sensor 16 may be fixedly arranged in the regeneration space 14. For example, the first temperature sensor 15 may be arranged in the regeneration space 14 at a position close to the end or the periphery of the drum. Similarly, the second temperature sensor 16 may also be arranged in the regeneration space 14 at a position close to the end or the periphery of the drum.

[0055] Optionally, the first temperature sensor 15 and the second temperature sensor 16 may also be arranged on the drum. For example, a plurality of first temperature sensors 15 may be arranged in the drum at intervals along the circumferential direction, and a plurality of second temperature sensors 16 may be arranged in the drum at intervals along the circumferential direction. The plurality of first temperature sensors 15 and the plurality of second temperature sensors 16 are configured such that at least one first temperature sensor 15 and at least one second temperature sensor 16 are located in the regeneration space 14 during the rotation of the drum.

[0056] Optionally, the regeneration space 14 is not limited to including two temperature sensors, but may also include three, four or more temperature sensors. When more than three temperature sensors are provided in the regeneration space 14, at least one temperature sensor other than the first temperature sensor 15 and the second temperature sensor 16 may be provided at a position different from the first temperature sensor 15 and the second temperature sensor 16, so as to detect the temperature of more points in the regeneration space 14. Alternatively, the at least one other temperature sensor may also be provided at the same position as the first temperature sensor 15 or the second temperature sensor 16. For example, in an application scenario where the accuracy of the temperature detection result is required to be high, the at least one temperature sensor may be used as a backup sensor for the first temperature sensor 15 or the second temperature sensor 16 at the same position, forming a detection mode of one main and one backup, and the temperature detection result at the same position is corrected by the detection result of the main and backup sensors to improve the accuracy of the temperature detection result, and the robustness of the system can be improved.

[0057] It is understandable that the first temperature sensor 15 and the second temperature sensor 16 may be various types of temperature sensors, and the types of the first temperature sensor 15 and the second temperature sensor 16 are not limited here, as long as they can detect the temperature in the regeneration space 14. For example, the first temperature sensor 15 and the second temperature sensor 16 include but are not limited to thermocouple temperature sensors, thermal resistance temperature sensors, infrared temperature sensors, etc.

[0058] The desiccant regeneration process usually uses high-temperature regeneration gas to flow through the wet desiccant, so that the moisture absorbs heat and is converted into water vapor, which is then carried away by the regeneration gas flow to remove the moisture in the desiccant and achieve the purpose of regenerating the desiccant. On this basis, the inventors have found through experiments that the temperature of the regeneration space 14 is closely related to the moisture content of the desiccant. The higher the moisture content of the desiccant, the greater the amount of heat absorbed and the lower the temperature of the regeneration space 14. On the contrary, the lower the moisture content of the desiccant, the smaller the amount of heat absorbed and the higher the temperature of the regeneration space 14. Furthermore, the moisture content of the desiccant can directly reflect the regeneration status of the desiccant, and the regeneration status of the desiccant can be monitored by detecting the temperature of the regeneration space 14.

[0059] The gas drying system 10 of the embodiment of the present application is provided with a first temperature sensor 15 and a second temperature sensor 16 at different positions of the regeneration space 14. The first temperature sensor 15 and the second temperature sensor 16 can detect the temperature at different positions of the regeneration space 14, and can avoid a large deviation between the detection result and the actual temperature due to the temperature sensor itself or the uneven distribution of the regeneration airflow. Based on the detection results of the first temperature sensor 15 and the second temperature sensor 16, it is possible to accurately determine whether the regeneration process of the desiccant meets the design expectations, so as to accurately monitor the regeneration status of the desiccant, thereby taking into account both the desiccant regeneration effect and the system energy consumption.

[0060] In some embodiments, the first temperature sensor 15 and the second temperature sensor 16 are respectively disposed at different positions in the first direction and / or at different positions in the second direction of the regeneration space 14. The first direction is the rotation direction of the drum, and the second direction is the rotation centerline direction of the drum.

[0061] There are differences in the order in which the desiccant at different positions in the first direction enters the regeneration space 14, and there are differences in the order in which the desiccant at different positions in the second direction contacts the regeneration gas flow. The first temperature sensor 15 and the second temperature sensor 16 are respectively arranged at different positions in the first direction and / or at different positions in the second direction in the regeneration space 14, so as to monitor the regeneration status of the desiccant that enters the regeneration space 14 first and second, and / or monitor the regeneration status of the desiccant that contacts the regeneration gas first and second, and accurately monitor the regeneration status of the desiccant at different positions.

[0062] Optionally, the positions of the first temperature sensor 15 and the second temperature sensor 16 in the first direction and the second direction may be different, such as Figure 1 shown.

[0063] Optionally, the first temperature sensor 15 and the second temperature sensor 16 may be located at different positions in the first direction, but may be located at the same position in the second direction.

[0064] Optionally, the first temperature sensor 15 and the second temperature sensor 16 may be located at the same position in the first direction, and may be located at different positions in the second direction.

[0065] In some embodiments, the drying space 13 is formed by the inner cavity of the shell 12 within the first central angle range, and the regeneration space 14 is formed by the inner cavity of the shell 12 within the second central angle range. The vertices of the first central angle and the second central angle are located on the rotation center line of the drum. In this way, the desiccant on the drum within the same central angle range can be synchronously transferred into the drying space 13 or the regeneration space 14.

[0066] Optionally, the housing 12 may be cylindrical. On this basis, the drying space 13 is formed by an inner cavity located within the first central angle range and having a fan-shaped cross section, such as Figure 2 The regeneration space 14 is formed by an inner cavity located within the second center angle range and having a fan-shaped cross section, as shown in FIG. Figure 2 Of course, the shell 12 is not limited to being cylindrical, and the shell 12 can also be a polygonal column or other regular or irregular shapes.

[0067] In practical application, the specific angle ranges of the first center angle range and the second center angle range and the proportional relationship therebetween are set according to design parameters such as the rated drying flow rate of the gas drying system 10. The specific angles and proportional relationship of the first center angle range and the second center angle range are not limited here.

[0068] Optionally, the regeneration space 14 and the drying space 13 may be adjacent to each other in the first direction. For example, the head end of the regeneration space 14 may be connected to the end of the drying space 13, and the end of the regeneration space 14 may be connected to the head end of the drying space 13. The head end of the regeneration space 14 is the end through which the wet desiccant is transferred in during the rotation of the drum, and the end of the regeneration space 14 is the end through which the regenerated desiccant is transferred out during the rotation of the drum. Similarly, the head end of the drying space 13 is the end through which the regenerated desiccant is transferred in during the rotation of the drum, and the end of the drying space 13 is the end through which the wet desiccant is transferred out during the rotation of the drum.

[0069] Optionally, the regeneration space 14 and the drying space 13 may be connected by other spaces. For example, one or more cooling spaces for cooling the desiccant may be provided between the end of the regeneration space 14 and the beginning of the drying space 13. For another example, one or more preheating and regeneration spaces 14 may be provided between the beginning of the regeneration space 14 and the end of the drying space 13. Optionally, one or more temperature sensors may be provided in the cooling space and / or the preheating and regeneration space 14 to further improve the monitoring capability of the desiccant regeneration status.

[0070] In some embodiments, the first temperature sensor 15 and the second temperature sensor 16 are respectively located on both sides of a target plane, which is a plane defined by the bisector of the second central angle and the rotation centerline of the drum. Thus, one of the first temperature sensor 15 and the second temperature sensor 16 is close to the head end of the regeneration space 14, and the other is close to the end of the regeneration space 14, so that the regeneration status of the desiccant that has entered the regeneration space 14 for a short time can be monitored, and the regeneration status of the desiccant that is about to leave the regeneration space 14 can also be monitored, so that the regeneration status of the desiccant can be accurately monitored.

[0071] For example, the second central angle may be Figure 1 As shown in ∠B, the bisector of the second central angle can be Figure 1 As shown by line C in the figure, the rotation center line of the drum can be as shown in FIG. Figure 1 On this basis, the target plane is the plane defined by the C line and the D line.

[0072] In some embodiments, a first angle is formed between the first temperature sensor 15 and the target plane, and a second angle is formed between the second temperature sensor 16 and the target plane. The vertices of the first angle and the second angle are both located on the rotation centerline of the drum, and the ratio of the first angle to the second angle is 0.5 to 1.

[0073] The vertex of the first angle and the top of the second angle are both located on the rotation center line of the drum, and the first angle and the second angle are actually central angles. The ratio between the angle of the first angle and the angle of the second angle can also be understood as the angle ratio between the central angle between the first temperature sensor 15 and the target plane and the central angle between the second temperature sensor 16 and the target plane.

[0074] For example, Figure 2 Taking the example of the line C representing the angle bisector of the second central angle, the first angle can be expressed as Figure 2 As shown in ∠E, the second angle can be Figure 2 As shown in ∠F, the angle ratio of the first angle to the second angle is also the angle ratio between ∠E and ∠F.

[0075] Within the above ratio range, the detection result of the first temperature sensor 15 and the detection result of the second temperature sensor 16 have a high reference value, which is conducive to accurately determining the regeneration status of the desiccant.

[0076] Optionally, the ratio of the first angle to the second angle may be 1. In this way, the first temperature sensor 15 and the second temperature sensor 16 are symmetrically arranged on opposite sides of the target plane.

[0077] In some embodiments, a third angle is formed between the first temperature sensor 15 and the second temperature sensor 16, the vertex of the third angle is located on the rotation center line of the drum, and the angle of the third angle is 50° to 80°. The third angle is actually the central angle between the first temperature sensor 15 and the second temperature sensor 16, which can be specifically as follows: Figure 2 As shown in ∠G. In this way, the detection results of the first temperature sensor 15 and the second temperature sensor 16 can represent the regeneration status of the desiccant in different areas of the regeneration space 14, so as to determine the overall regeneration status of the desiccant in the regeneration space 14.

[0078] It can be understood that the angle of the third angle is actually the sum of the angles of the first angle and the second angle. Therefore, when the third angle is 50° to 80°, the first angle is approximately 16° to 40°, the second angle is approximately 34° to 58°, and the angle ratio of the first angle to the second angle is 0.5 to 1.

[0079] Exemplarily, when the third angle is 50° and the angle ratio of the first angle to the second angle is 0.5, the first angle is approximately 16° and the second angle is approximately 34°. When the third angle is 80° and the ratio of the first angle to the second angle is 1, the first angle and the second angle are both 40°.

[0080] In some embodiments, the distance between the first temperature sensor 15 and the second temperature sensor 16 in the second direction is 0 cm to 15 cm. Optionally, the distance between the first temperature sensor 15 and the second temperature sensor 16 in the second direction can be represented by H as shown in 3. Within this distance range, the detection result of the first temperature sensor 15 and the detection result of the second temperature sensor 16 can better reflect the temperature conditions at different positions in the regeneration space 14 in the second direction, and make the detection results of the first temperature sensor 15 and the detection results of the second temperature sensor 16 have a high reference, thereby achieving the purpose of accurately monitoring the regeneration status of the desiccant.

[0081] In some embodiments, the shell 12 is provided with a plurality of detection holes (not shown in the figure) penetrating the regeneration space 14, and the first temperature sensor 15 and the second temperature sensor 16 extend from one of the detection holes to between the inner periphery of the shell 12 and the outer periphery of the drum. In this way, it is not only conducive to the arrangement of the first temperature sensor 15 and the second temperature sensor 16, but also provides a variety of combinations for the first temperature sensor 15 and the second temperature sensor 16. In practical applications, by adjusting the detection holes to which the first temperature sensor 15 and / or the second temperature sensor 16 are plugged, the connection position of the first temperature sensor 15 and / or the second temperature sensor 16 can be adjusted, which can improve the flexibility of the system.

[0082] In some embodiments, the gas drying system 10 may further include a controller (not shown in the figure), which may be used to control the workload of the drying device 11 based on the detection results of the first temperature sensor 15 and the second temperature sensor 16. In this way, the purpose of automatically regulating the gas drying system 10 can be achieved through the controller.

[0083] Optionally, the controller may be constructed to include a processor and a storage medium storing a computer program. Specifically, the controller includes at least a processing component, a RAM, a ROM, a communication interface, a memory, and an I / O interface. The processing component, the RAM, the ROM, the communication interface, the memory, and the I / O interface communicate via a bus. The processing component may be a CPU, a GPU, or other chip with computing power. The memory contains various computer programs such as an operating system and an application program for execution by the processor component and the data required to execute the computer program.

[0084] In addition, during the operation of the gas drying system 10, any data that needs to be stored locally can be stored in the memory. The I / O interface is composed of a serial interface such as USB, IEEE or RS-C, a parallel interface such as SCSI, IDE or IEEE, and an analog signal interface composed of a D / A converter and an A / D converter. The I / O interface is connected to an input device composed of a keyboard, a mouse, a touch screen or other control buttons, and the user can use the input device to directly input data to the controller.

[0085] In addition, the I / O interface can also be connected to a display device with a display function, such as an LCD screen, a touch screen, an LED display, etc. The controller can output the processed data to the display device in the form of image display data for display, such as temperature, pressure, flow, etc. The communication interface is an interface that can be any currently known communication protocol. The communication interface communicates with the outside world through a network. The controller can connect to the network through a communication interface using a certain communication protocol and transmit data between any device connected to the network.

[0086] Optionally, the workload state of the drying device 11 may be determined based on the detection results of the first temperature sensor 15 and the detection results of the second temperature sensor 16. The workload state of the drying device 11 may be used to characterize the relationship between the demand for regeneration gas of the wet desiccant and the supply of regeneration gas. For example, when the detection results of the first temperature sensor 15 and the detection results of the second temperature sensor 16 indicate that the temperature of the regeneration space 14 is high, it indicates that the supply of regeneration gas is greater than the demand, and the workload is low. When the detection results of the first temperature sensor 15 and the detection results of the second temperature sensor 16 indicate that the temperature of the regeneration space 14 is high, it indicates that the supply of regeneration gas is less than the demand, and the workload is high.

[0087] On the basis of determining the workload state of the drying device 11, the workload of the drying device 11 can be regulated by adjusting the operating state of the gas drying system 10. Regulating the operating state of the gas drying system 10 includes but is not limited to increasing the workload of the drying device 11, reducing the workload of the drying device 11, adjusting the motion state of the drum, adjusting gas parameters, and the like.

[0088] The specific process and principle of regulating the workload of the drying device 11 are described in detail below in conjunction with some specific embodiments, but it should not be understood that it is limited to regulating the workload of the drying device 11 in the following manner. In specific implementation, any measure that can regulate the supply and demand relationship of the regeneration gas of the gas drying system 10 should be understood to be included in the protection scope of this application.

[0089] In some embodiments, the controller is specifically used to: control the rotation speed of the drum based on the detection results of the first temperature sensor 15 and the detection results of the second temperature sensor 16. Specifically, the workload state of the drying device 11 can be determined based on the detection results of the first temperature sensor 15 and the detection results of the second temperature sensor 16. When the workload state of the drying device 11 indicates that the workload of the drying device 11 is low, the rotation speed of the drum can be reduced, thereby extending the residence time of the desiccant in the drying space 13, increasing the moisture content of the desiccant, and increasing the demand for regeneration gas by the desiccant, thereby achieving a balance between the supply and demand of the regeneration gas. When the working state of the drying device 11 indicates that the workload of the drying device 11 is high, the rotation speed of the drum can be increased, thereby shortening the residence time of the desiccant in the drying space 13, reducing the moisture content of the desiccant, and reducing the demand for regeneration gas by the desiccant, thereby achieving a balance between the supply and demand of the regeneration gas. Adjusting the rotation speed of the drum can achieve the purpose of regulating the workload state of the drying device 11 without affecting the drying capacity of the gas drying system 10 for the gas to be dried, which can not only meet the gas drying requirements but also control the stable operation of the gas drying system 10.

[0090] In some embodiments, the controller is specifically configured to:

[0091] Determine an equivalent temperature capable of identifying a temperature state of the regeneration space 14 based on a detection result of the first temperature sensor 15 and a detection result of the second temperature sensor 16;

[0092] Based on the equivalent temperature, the rotation speed of the drum is controlled.

[0093] Optionally, the detection result of the first temperature sensor 15 can be recorded as the first temperature value, and the detection result of the second temperature sensor 16 can be recorded as the second temperature value. On this basis, the first temperature value and the second temperature value can be statistically calculated to determine the equivalent temperature. For example, the arithmetic mean of the first temperature value and the second temperature value can be used as the equivalent temperature. For another example, the weighted average of the first temperature value and the second temperature value can be used as the equivalent temperature. Of course, other statistical calculation results of the first temperature value and the second temperature value can also be used as the equivalent temperature. In this way, it is not only conducive to simplifying the control logic, but also conducive to precise control of the gas drying system 10.

[0094] In some embodiments, the controller is specifically configured to:

[0095] When the equivalent temperature is within the first temperature range, the rotation speed of the drum is reduced; the first temperature range is used to indicate that the supply of the regeneration gas in the regeneration space 14 is greater than the demand for the regeneration gas for the desiccant regeneration;

[0096] When the equivalent temperature is within the second temperature range, the rotation speed of the drum is increased; the second temperature range is used to indicate that the supply of the regeneration gas in the regeneration space 14 is less than the demand for the regeneration gas for the desiccant regeneration.

[0097] Optionally, the supply and demand relationship of the regeneration gas at different temperatures in the regeneration space 14 can be determined in advance based on experimental data or empirical data, and a first temperature range that can characterize that the supply of regeneration gas is greater than the demand, and a second temperature range that can characterize that the supply of regeneration gas is greater than the demand are selected. When the equivalent temperature has been determined, the controller can compare the equivalent temperature with the first temperature range and the second temperature range, and thereby adjust the rotation speed of the drum, and the control logic is simple and easy to implement.

[0098] Optionally, a correlation between the first temperature range and the second temperature range and the speed adjustment amount of the drum may be pre-established. When it is determined that the equivalent temperature is within the first temperature range or the second temperature range, the speed of the drum may be adjusted based on the correlation.

[0099] It is understandable that in practical application, the temperature range is not limited to the first temperature range and the second temperature range, and three, four or more temperature ranges may be set according to actual needs, so as to achieve step-by-step control of the drum.

[0100] For example, a third temperature range may be set above the first temperature range. The third temperature range may be used to indicate that the supply of regeneration gas in the regeneration space 14 is much greater than the demand. When the equivalent temperature is within the third temperature range, the rotation speed of the drum may be significantly reduced.

[0101] For example, a fourth temperature range may be set below the second temperature range. The fourth temperature range may be used to indicate that the supply of regeneration gas is much less than the demand. When the equivalent temperature is within the fourth temperature range, the rotation speed of the drum may be significantly increased.

[0102] Cooperate Figure 4 As shown, in some embodiments, the gas drying system 10 further includes a flow mixing device 18. One air inlet of the flow mixing device 18 is used to receive the gas to be dried; another air inlet of the flow mixing device 18 is connected to the air outlet of the regeneration space 14, and is used to receive the wet regeneration gas from the regeneration space 14; the air outlet of the flow mixing device 18 is connected to the air inlet of the drying space 13, and the flow mixing device 18 is used to transport the mixed gas formed by mixing the gas to be dried and the wet regeneration gas to the drying space 13.

[0103] The controller is specifically used to control the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas based on the detection results of the first temperature sensor 15 and the detection results of the second temperature sensor 16. By adjusting the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas, the moisture content of the mixed gas flowing into the drying space 13 can be adjusted, and then the moisture content of the wet desiccant transferred into the regeneration space 14 can be adjusted, and the flow rate of the regeneration gas can also be adjusted, so as to directly and quickly adjust the supply and demand relationship of the regeneration gas.

[0104] In some embodiments, the gas drying system 10 further includes a third temperature sensor 17 , and the third temperature sensor 17 is used to detect the intake air temperature of the drying space 13 .

[0105] The controller is specifically used to control the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas based on the detection results of the first temperature sensor 15 , the detection results of the second temperature sensor 16 and the detection results of the third temperature sensor 17 .

[0106] The air inlet temperature of the drying space 13 can represent the load of the gas to be dried to a certain extent. Specifically, when the air inlet temperature of the drying space 13 is high, it represents that the load of the gas to be dried is high. When the air inlet temperature of the drying space 13 is low, it represents that the load of the gas to be dried is low.

[0107] On this basis, based on the detection results of the first temperature sensor 15, the detection results of the second temperature sensor 16 and the detection results of the third temperature sensor 17, the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas is controlled, which can not only achieve the supply and demand balance of the regeneration gas, but also ensure the drying effect of the gas to be dried.

[0108] In some embodiments, the gas drying system 10 further includes a first valve, a second valve and / or a third valve. The first valve is disposed at an air inlet of the mixing device 18, and is used to adjust the flow rate of the gas to be dried. The second valve is disposed between another air inlet of the mixing device 18 and the air outlet of the regeneration space 14, and is used to adjust the flow rate of the wet regeneration gas. The third valve is disposed between the air outlet of the mixing device 18 and the air inlet of the drying space 13, and is used to adjust the flow rate of the mixed gas.

[0109] The controller is specifically used to: based on the detection results of the first temperature sensor 15 and the detection results of the second temperature sensor 16, use the first valve, the second valve and / or the third valve to regulate the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas.

[0110] Optionally, the gas drying system 10 may include a first valve, and an air inlet of the flow mixing device 18 may be connected to a gas source of the gas to be dried through the first valve. The controller may adjust the opening of the first valve based on the detection results of the first temperature sensor 15 and the detection results of the second temperature sensor 16 to adjust the flow rate of the gas to be dried, thereby adjusting the mixing ratio of the gas to be dried and the wet regeneration gas.

[0111] Optionally, the gas drying system 10 may also include a second valve, and another gas inlet of the flow mixing device 18 may be connected to the gas outlet of the regeneration space 14 through the second valve. The controller may adjust the flow rate of the wet regeneration gas by adjusting the opening of the second valve, thereby adjusting the flow rate of the regeneration gas flowing into the regeneration space 14, and the mixing ratio of the gas to be dried and the wet regeneration gas.

[0112] Similarly, the gas drying system 10 may also include a third valve. Alternatively, the gas drying system 10 may also include any two of the first valve, the second valve and the third valve. Alternatively, the gas drying system 10 may include the first valve, the second valve and the third valve at the same time.

[0113] Optionally, the flow mixing device 18 may include a venturi tube. One air inlet of the venturi tube may be connected to a gas source of the gas to be dried, the other air inlet of the venturi tube may be connected to an air outlet of the regeneration space 14, and the air outlet of the venturi tube may be connected to an air inlet of the drying space 13. The venturi tube can extract wet regeneration gas, thereby providing power for the regeneration gas flow, which is conducive to simplifying the system structure and reducing production costs.

[0114] Optionally, the flow mixing device 18 may also include a three-way pipe structure, one air inlet of the three-way pipe structure may be connected to the gas source of the gas to be dried, the other air inlet of the three-way pipe structure may be connected to the air outlet of the regeneration space 14, and the air outlet of the three-way pipe structure may be connected to the air inlet of the drying space 13. The three-way pipe structure is easy to implement and has a simple structure. It can also well achieve the purpose of adjusting the flow rate of the gas to be dried and / or the wet regeneration gas by cooperating with at least one of the first valve, the second valve and the third valve.

[0115] It should be noted that the mixing flow device 18 can have multiple implementation forms. When different implementation forms are adopted, different adjustments can be used to regulate the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas. It should not be understood that the mixing flow device 18 is limited to the specific implementation forms in the above examples.

[0116] In some embodiments, the gas drying system 10 further includes a heating device, the gas outlet of the heating device is connected to the gas inlet of the regeneration space 14, and the heating device is used to heat the regeneration gas.

[0117] The controller is specifically used to adjust the power of the heating device based on the detection result of the first temperature sensor 15 and the detection result of the second temperature sensor 16 , so as to adjust the intake air temperature of the regeneration space 14 .

[0118] Adjusting the inlet temperature of the regeneration gas can adjust the drying capacity of the regeneration gas per unit flow rate, and can also achieve the purpose of adjusting the supply and demand balance of the regeneration gas. Specifically, when the moisture content of the desiccant does not change, the higher the inlet temperature of the regeneration gas, the smaller the flow rate of the regeneration gas required per unit mass of the desiccant. The lower the inlet temperature of the regeneration gas, the larger the flow rate of the regeneration gas required per unit mass of the desiccant.

[0119] Optionally, the heating device may be a dedicated heater between the gas source of the regeneration gas and the regeneration space 14. For example, an electric heater, a fuel oil heater, a gas heater, and the like.

[0120] Optionally, the heating device can also be formed by, for example, a heat exchanger 26. For example, the cold side inlet of the heat exchanger 26 can be connected to an outlet of the drying space 13, so that at least part of the dried gas can flow into the heat exchanger 26 for use as regeneration gas. The cold side outlet of the heat exchanger 26 can be connected to the air inlet of the regeneration space 14. The hot side inlet of the heat exchanger 26 can be connected to a gas source of the gas to be dried, and the hot side outlet of the heat exchanger 26 can be connected to the air inlet of the drying space 13, as shown in FIG. Figure 4 By adjusting the flow rate, flow velocity, residence time and other parameters of the cold side and / or hot side of the heat exchanger 26, the heat exchange efficiency can be adjusted, thereby achieving the purpose of adjusting the degree of heating of the regeneration gas by the heat exchanger 26.

[0121] Optionally, the heating device may include a single heat exchanger 26 or a plurality of heat exchangers 26. Taking the compressor unit 20 as an example, the compressor unit 20 may include a plurality of compressors connected in sequence, such as Figure 4 The heat exchanger 26 can be arranged between any two adjacent compressors, and the regeneration gas is heated by the heat exchanger 26. Optionally, when the heating device includes a plurality of heat exchangers 26, the plurality of heat exchangers 26 can be connected in parallel or in series.

[0122] The present application also provides a gas compression system. Figure 4 As shown, the gas compression system of the embodiment of the present application may include a compressor unit 20 and any of the aforementioned gas drying systems 10 .

[0123] The gas outlet of the compressor unit 20 is connected to the gas inlet of the gas drying system 10 . The compressor unit 20 is used to prepare compressed gas and transport the compressed gas to the gas drying system 10 as the gas to be dried.

[0124] Since the gas drying system 10 can accurately monitor the regeneration status of the desiccant and can take into account both the regeneration effect of the desiccant and the system energy consumption, the gas compression system using the gas drying system 10 can not only ensure the drying effect of the compressed gas, but also help reduce the system energy consumption.

[0125] Optionally, the compressor unit 20 may include a single compressor or multiple compressors. In the case where the compressor unit 20 includes multiple compressors, the multiple compressors may be connected in parallel. Figure 4 As shown, they are connected in series to form a compressor unit 20 capable of performing multi-stage compression on gas.

[0126] When the compressor unit 20 includes multiple compressors, a cooling device may be provided between adjacent compressors to cool the high-temperature compressed gas. Figure 4 As shown, a primary cooling device 22 may be provided between the primary compressor 21 and the secondary compressor 23, a secondary cooling device 24 may be provided between the secondary compressor 23 and the tertiary compressor 25, and a tertiary cooling device 27 may be provided between the tertiary compressor 25 and the flow mixing device 18. In addition, in order to control the temperature of the mixed gas flowing out of the flow mixing device 18, a quaternary cooling device 19 may be provided between the flow mixing device 18 and the drying device 11.

[0127] It is understandable that each stage of the cooling device can be formed by a dedicated cooler that uses a cooling medium as a cold source. For example, the dedicated cooler can use a cooling medium such as cold air, cooling water, cooling oil, etc. as a cold source to cool the high-temperature compressed gas. Each stage of the cooling device can also be formed by the aforementioned heat exchanger 26. In fact, Figure 4 The heat exchanger 26 in the heat exchanger also acts as a cooling device.

[0128] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A gas drying system, It is characterized in that include: The drying device comprises a shell and a drum, wherein the shell has a drying space and a regeneration space, the drum is provided with a desiccant, and the drum is rotatably arranged in the shell to drive the desiccant to pass through the drying space and the regeneration space successively; The first temperature sensor and the second temperature sensor are arranged at different positions of the regeneration space, and the first temperature sensor and the second temperature sensor are respectively used to detect the temperatures at different positions of the regeneration space.

2. The gas drying system according to claim 1, It is characterized in that The first temperature sensor and the second temperature sensor are respectively arranged at different positions of the regeneration space in the first direction and / or at different positions in the second direction; The first direction is the rotation direction of the drum, and the second direction is the rotation centerline direction of the drum.

3. The gas drying system according to claim 2, It is characterized in that The drying space is formed by the inner cavity of the shell located within the first central angle range, and the regeneration space is formed by the inner cavity of the shell located within the second central angle range; Wherein, the vertex of the first central angle and the vertex of the second central angle are located on the rotation center line of the drum.

4. The gas drying system according to claim 3, It is characterized in that The first temperature sensor and the second temperature sensor are respectively located on two sides of a target plane, and the target plane is a plane defined by an angle bisector of the second central angle and a rotation centerline of the drum.

5. The gas drying system according to claim 4, It is characterized in that There is a first angle between the first temperature sensor and the target plane, and there is a second angle between the second temperature sensor and the target plane. The vertices of the first angle and the second angle are both located on the rotation center line of the drum, and the ratio of the first angle to the second angle is 0.5 to 1.

6. The gas drying system according to claim 4, It is characterized in that There is a third angle between the first temperature sensor and the second temperature sensor, the vertex of the third angle is located on the rotation center line of the drum, and the angle of the third angle is 50° to 80°.

7. The gas drying system according to claim 2, It is characterized in that The distance between the first temperature sensor and the second temperature sensor in the second direction is 0 cm to 15 cm.

8. The gas drying system according to claim 2, It is characterized in that The shell is provided with a plurality of detection holes penetrating into the regeneration space, and the first temperature sensor and the second temperature sensor extend from one of the detection holes to between the inner periphery of the shell and the outer periphery of the drum.

9. The gas drying system according to any one of claims 1 to 8, It is characterized in that Also includes: A controller is used to control the workload of the drying device based on the detection result of the first temperature sensor and the detection result of the second temperature sensor.

10. The gas drying system according to claim 9, It is characterized in that The controller is specifically used for: The rotation speed of the drum is controlled based on the detection result of the first temperature sensor and the detection result of the second temperature sensor.

11. The gas drying system according to claim 10, It is characterized in that The controller is specifically used for: determining an equivalent temperature capable of identifying a temperature state of the regeneration space based on a detection result of the first temperature sensor and a detection result of the second temperature sensor; Based on the equivalent temperature, the rotation speed of the drum is controlled.

12. The gas drying system according to claim 11, It is characterized in that The controller is specifically used for: When the equivalent temperature is within the first temperature range, the rotation speed of the drum is reduced; the first temperature range is used to indicate that the supply of the regeneration gas in the regeneration space is greater than the demand for the regeneration gas for the desiccant regeneration; When the equivalent temperature is within a second temperature range, the rotation speed of the drum is increased; the second temperature range is used to indicate that the supply of regeneration gas in the regeneration space is less than the demand for regeneration gas for desiccant regeneration.

13. The gas drying system according to claim 9, It is characterized in that The gas drying system further comprises a flow mixing device, one air inlet of the flow mixing device is used to receive the gas to be dried; the other air inlet of the flow mixing device is connected to the air outlet of the regeneration space, and is used to receive the wet regeneration gas from the regeneration space; the air outlet of the flow mixing device is connected to the air inlet of the drying space, and the flow mixing device is used to transport the mixed gas formed by mixing the gas to be dried and the wet regeneration gas to the drying space; the controller is specifically used to: Based on the detection result of the first temperature sensor and the detection result of the second temperature sensor, the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas is controlled.

14. The gas drying system according to claim 13, It is characterized in that The gas drying system further includes a third temperature sensor, which is used to detect the inlet air temperature of the drying space; the controller is specifically used to: Based on the detection result of the first temperature sensor, the detection result of the second temperature sensor, and the detection result of the third temperature sensor, the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas is controlled.

15. The gas drying system according to claim 13, It is characterized in that The gas drying system further comprises a first valve, a second valve and / or a third valve; The first valve is disposed at an air inlet of the flow mixing device and is used to adjust the flow rate of the gas to be dried; The second valve is arranged between another air inlet of the mixing flow device and the air outlet of the regeneration space, and is used to adjust the flow rate of the wet regeneration gas; The third valve is arranged between the gas outlet of the flow mixing device and the gas inlet of the drying space, and is used to adjust the flow rate of the mixed gas; The controller is specifically used for: Based on the detection results of the first temperature sensor and the detection results of the second temperature sensor, the flow rate of the gas to be dried and / or the flow rate of the wet regeneration gas are regulated by using the first valve, the second valve and / or the third valve.

16. The gas drying system according to claim 9, It is characterized in that The gas drying system further comprises a heating device, the gas outlet of the heating device is connected to the gas inlet of the regeneration space, and the heating device is used to heat the regeneration gas; the controller is specifically used to: Based on the detection result of the first temperature sensor and the detection result of the second temperature sensor, the power of the heating device is regulated to regulate the intake air temperature of the regeneration space.

17. A gas compression system, It is characterized in that It comprises a compressor unit and a gas drying system as described in any one of claims 1 to 16; the gas outlet of the compressor unit is connected to the gas inlet of the gas drying system, and the compressor unit is used to prepare compressed gas and transport the compressed gas to the gas drying system as gas to be dried.

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