Air compressor system and control method with waste heat recovery

Abstract

This application relates to an air compressor system and control method with waste heat recovery. The air compressor system with waste heat recovery includes: a first dehumidifier, an air compressor, an oil-gas separator, a first heat exchanger, a second dehumidifier, an air receiver, and a second heat exchanger. The second heat exchanger includes a first heat exchange pipeline and a second heat exchange pipeline. The first dehumidifier, air compressor, oil-gas separator, first heat exchanger, second dehumidifier, and air receiver are sequentially connected to form a first flow path. The oil-gas separator, first heat exchange pipeline, and air compressor are sequentially connected to form a second flow path. The outlet end of the first dehumidifier, the second heat exchange pipeline, and the inlet end of the first dehumidifier are sequentially connected to form a third flow path. According to the air compressor system with waste heat recovery of the present invention, the lubricating oil can exchange heat with the dehumidifying solution, the lubricating oil can be cooled, ensuring the high quality of the lubricating oil in the air compressor, and the dehumidifying solution can be converted into a concentrated dehumidifying solution, realizing the regeneration of the concentrated dehumidifying solution.

Description

Technical Field

[0001] This application relates to the field of waste heat recovery technology for air compressors, and more particularly to an air compressor system and control method with waste heat recovery. Background Technology

[0002] The air compressor generates a significant amount of heat during production. The temperature of the lubricating oil in the air compressor typically ranges from 60 to 100°C after operation. According to the operating principle of air compressor oil (lubricating oil), when the oil temperature exceeds 90°C, the oil is prone to oxidation, resulting in decreased viscosity or deterioration, poor lubrication, and a shortened equipment lifespan. Therefore, to reduce equipment accidents, the air compressor temperature needs to be controlled within a certain range. Compressed air needs to be cooled to varying degrees during production to recover heat and avoid wasting thermal energy resources.

[0003] The intake humidity of the compressed gas in an air compressor has a significant impact on its energy consumption. Moist air consists of dry air and water vapor; however, compressing the same mass flow rate of moist air requires more compression work than compressing dry air. Therefore, it is necessary to dehumidify the air before it enters the air compressor. Different production processes have different humidity requirements for compressed air, and different degrees of dehumidification are applied to the compressed air according to these requirements.

[0004] In existing technologies, circulating water is used as a heat exchange medium to recover waste heat from the air compressor's lubricating oil. The heated circulating water regenerates the dehumidifying solution, which then dehumidifies the air before and after the evaporative cooling device. Dehumidifying the air after evaporative cooling requires maintaining the temperature of the dehumidifying solution. However, cooling the regenerated dehumidifying solution in the main pipeline increases the energy consumption of the subcooler. Furthermore, this circulation loop lacks monitoring of the lubricating oil temperature, making it impossible to adjust for abnormal lubricating oil temperatures, thus affecting the operation of the air compressor. Some systems recover waste heat from the air compressor using waste heat recovery units and heat exchangers. However, this method requires an additional waste heat recovery unit for each air compressor, increasing initial investment, system complexity, and heat loss. Summary of the Invention

[0005] This application provides an air compressor system with waste heat recovery, in which the lubricating oil can directly exchange heat with the dehumidifying dilute solution in the second heat exchanger to cool the lubricating oil, reduce the operating temperature of the air compressor, ensure the quality of the air compressor lubricating oil, reduce the consumption of the air compressor lubricating oil, and simplify the structural setting of the air compressor system.

[0006] In a first aspect, this application provides an air compressor system with waste heat recovery, comprising: a first dehumidifier, an air compressor, an oil-gas separator, a first heat exchanger, a second dehumidifier, an air receiver, and a second heat exchanger. The second heat exchanger includes a first heat exchange pipeline and a second heat exchange pipeline, which are capable of heat transfer. The first dehumidifier, the air compressor, the oil-gas separator, the first heat exchanger, the second dehumidifier, and the air receiver are sequentially connected to form a first flow path. The oil-gas separator, the first heat exchange pipeline, and the air compressor are sequentially connected to form a second flow path. The outlet end of the first dehumidifier, the second heat exchange pipeline, and the inlet end of the first dehumidifier are sequentially connected to form a third flow path.

[0007] According to the air compressor system with waste heat recovery of the present invention, a first temperature and humidity sensor is provided on the first heat exchange pipeline and the pipeline connecting the air compressor, a first control valve is provided on the pipeline connecting the oil-gas separator and the air compressor, and a second control valve is provided on the pipeline connecting the outlet end of the first dehumidifier and the second heat exchange pipeline, and the opening degree of the first control valve and the second control valve is adjustable.

[0008] Optionally, the second heat exchanger is provided with a first heating section, which is used to heat the second heat exchange pipeline.

[0009] Optionally, a second temperature and humidity sensor is provided on the pipeline connecting the first dehumidifier and the air compressor, and / or

[0010] The third flow path is also provided with a first liquid storage tank and a first pump body connected in sequence. The first liquid storage tank and the first pump body are located between the outlet end of the first dehumidifier and the second heat exchange pipeline.

[0011] The air compressor system with waste heat recovery according to the present invention further includes a first reversing valve, a second reversing valve, and a third reversing valve. The first heat exchanger includes a third heat exchange pipeline and a fourth heat exchange pipeline, which are capable of heat transfer. The second dehumidifier includes a first dehumidification chamber and a second dehumidification chamber. The first reversing valve includes a first port, a second port, a third port, and a fourth port. The first dehumidification chamber is connected to the first port, the second dehumidification chamber is connected to the second port, the fourth heat exchange pipeline is connected to the third port, the fourth port is used to connect to the indoor environment, and the third port can be connected to the first port, the second port, and the third port respectively. The second port and the fourth port are connected. The second reversing valve includes a fifth port, a sixth port, and a seventh port. The third reversing valve includes an eighth port, a ninth port, and a tenth port. The fifth port is connected to the third heat exchange pipeline. The sixth port is connected to the first dehumidification chamber. The seventh port is connected to the eighth port. The ninth port is connected to the second dehumidification chamber. The tenth port is connected to the gas storage tank. The fifth port, the sixth port, the seventh port, the eighth port, and the tenth port are connected sequentially, or the fifth port, the seventh port, the eighth port, the ninth port, and the tenth port are connected sequentially.

[0012] According to the air compressor system with waste heat recovery of the present invention, the first heat exchanger includes a third heat exchange pipeline and a fourth heat exchange pipeline, which are capable of heat transfer. The second dehumidifier includes a first dehumidification chamber, a second dehumidification chamber, a first air inlet channel, a second air inlet channel, a third air inlet channel, a fourth air inlet channel, a first exhaust channel, a second exhaust channel, a third exhaust channel, and a fourth exhaust channel. The first air inlet channel connects the fourth heat exchange pipeline and the first dehumidification chamber. The first exhaust channel connects the first dehumidification chamber and the indoor environment. The second air inlet channel connects the third heat exchange pipeline and the first dehumidification chamber. The second exhaust channel connects the first dehumidification chamber and the air storage tank; the third air intake channel connects the fourth heat exchange pipeline and the second dehumidification chamber; the third exhaust channel connects the second dehumidification chamber and the indoor environment; the fourth air intake channel connects the third heat exchange pipeline and the second dehumidification chamber; the fourth exhaust channel connects the second dehumidification chamber and the air storage tank; the first air intake channel is equipped with a first air intake valve; the second air intake channel is equipped with a second air intake valve; the second exhaust channel is equipped with a second exhaust valve; the third air intake channel is equipped with a third air intake valve; the fourth air intake channel is equipped with a fourth air intake valve; and the fourth exhaust channel is equipped with a fourth exhaust valve.

[0013] Optionally, a third temperature and humidity sensor is provided at the air inlet of the gas storage tank, and / or a fourth temperature and humidity sensor is provided at the outlet of the fourth heat exchange pipeline.

[0014] Optionally, the fourth heat exchange pipeline and the second dehumidifier are connected by a first air pipe, and the first air pipe is provided with a second heating element.

[0015] Optionally, a second air pipe is provided between the fourth heat exchange pipeline and the second dehumidifier. The first air pipe and the second air pipe are connected in parallel. The inlet end and the outlet end of the first air pipe are respectively provided with a first switching valve and a second switching valve. The second air pipe is provided with a third switching valve.

[0016] Secondly, this application provides a control method for controlling the aforementioned air compressor system with waste heat recovery, comprising:

[0017] Monitor the real-time oil temperature of the lubricating oil flowing out of the second heat exchanger;

[0018] The opening degree of the first control valve and the second control valve is controlled according to the real-time oil temperature.

[0019] The control method according to the present invention further includes:

[0020] Monitor the humidity of the first gas discharged from the first dehumidifier;

[0021] When the humidity of the first gas is greater than or equal to the first maximum preset humidity, the first heating element is turned on.

[0022] Optionally, the control method further includes:

[0023] When the third heat exchange pipeline, the first dehumidification chamber and the gas storage tank are connected in sequence, the humidity of the second gas entering the gas storage tank is monitored.

[0024] When the second gas humidity is greater than or equal to the second maximum preset humidity, the third heat exchange pipeline, the second dehumidification chamber and the gas storage tank are sequentially connected, and the fourth heat exchange pipeline and the first dehumidification chamber are connected.

[0025] Optionally, the control method further includes:

[0026] Monitor the air temperature discharged from the fourth heat exchange pipeline;

[0027] When the air temperature is less than or equal to the minimum preset air temperature, the first switching valve, the second switching valve, and the second heating element are opened, and the third switching valve is closed.

[0028] The technical solution provided in this application has the following advantages compared with the prior art:

[0029] The air compressor system with waste heat recovery provided in this application allows the lubricating oil in the first heat exchange pipeline to directly exchange heat with the dehumidifying solution in the second heat exchange pipeline, thereby cooling the lubricating oil, reducing the operating temperature of the air compressor, ensuring the quality of the lubricating oil, reducing the consumption of lubricating oil, lowering the equipment failure rate, and realizing the primary utilization of energy. The high-temperature lubricating oil undergoes heat transfer with the dehumidifying solution in the second heat exchanger, realizing the regeneration of the dehumidifying solution. In addition, the dehumidifying solution obtained by recovering the waste heat from the lubricating oil returns to the first dehumidifier through the second heat exchange pipeline and the inlet end of the first dehumidifier, thereby dehumidifying the air entering the air compressor, reducing the moisture content of the compressed air, and reducing the energy consumption of the air compressor. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0033] Figure 1 A schematic diagram of an air compressor system with waste heat recovery according to an embodiment of the present invention is shown;

[0034] Figure 2 A flowchart illustrating a control method according to an embodiment of the present invention is shown;

[0035] Figure 3 A flowchart illustrating a control method according to an embodiment of the present invention is shown;

[0036] Figure 4 A flowchart illustrating a control method according to another embodiment of the present invention is shown;

[0037] Figure 5 A flowchart illustrating a control method according to yet another embodiment of the present invention is shown.

[0038] Explanation of reference numerals in the attached figures:

[0039] First dehumidifier 1, air compressor 2, oil-gas separator 3, first heat exchanger 4, second intake valve 5, second exhaust valve 6, fourth intake valve 7, fourth exhaust valve 8, second dehumidifier 9, third temperature and humidity sensor 10, air storage tank 11, second heat exchanger 12, first heating unit 13, third control valve 14, second pump body 15, liquid storage tank 16, first pump body 17, first temperature and humidity sensor 18, first control valve 19, second control valve 20, fourth control valve 21, second liquid storage tank 22, first exhaust valve 23, first dehumidification chamber 24, fourth temperature and humidity sensor 25, third switching valve 26, first switching valve 27, second heating unit 28, second switching valve 29, first intake valve 30, third intake valve 31, second dehumidification chamber 33, third exhaust valve 34, second temperature and humidity sensor 35. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0042] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptions used in the text will be interpreted accordingly.

[0043] like Figure 1 As shown, the air compressor system with waste heat recovery according to an embodiment of the present invention includes a first dehumidifier 1, an air compressor 2, an oil-gas separator 3, a first heat exchanger 4, a second dehumidifier 9, an air storage tank 11, and a second heat exchanger 12.

[0044] Specifically, the second heat exchanger 12 includes a first heat exchange pipeline and a second heat exchange pipeline, which can transfer heat. The first dehumidifier 1, the air compressor 2, the oil-gas separator 3, the first heat exchanger 4, the second dehumidifier 9, and the air storage tank 11 are connected in sequence to form a first flow path. The oil-gas separator 3, the first heat exchange pipeline, and the air compressor 2 are connected in sequence to form a second flow path. The outlet end of the first dehumidifier 1, the second heat exchange pipeline, and the inlet end of the first dehumidifier 1 are connected in sequence to form a third flow path. The first dehumidifier 1 is used to contain the dehumidification solution.

[0045] In other words, in the first flow path, the first dehumidifier 1 is used to dehumidify the air entering the air compressor 2, the air compressor 2 is used to compress the air, and there is lubricating oil in the air compressor 2 to lubricate and cool the air compressor 2 during operation. After that, the air compressed by the air compressor 2 and the lubricating oil enter the oil separator for separation. The separated compressed gas exchanges heat with the cooling medium in the first heat exchanger 4 and is cooled. The cooled compressed gas enters the second dehumidifier 9 for dehumidification and is then sent to the air storage tank 11 for storage.

[0046] In the second flow path, the lubricating oil separated from the compressed gas in the oil separator enters the first heat exchange pipeline. The concentrated dehumidifying solution that absorbs moisture from the air in the first dehumidifier 1 becomes a dilute dehumidifying solution (the dehumidifying effect of the dilute dehumidifying solution on the air will be weakened) and enters the second heat exchange pipeline. The high-temperature lubricating oil in the first heat exchange pipeline exchanges heat with the dilute dehumidifying solution in the second heat exchange pipeline. The temperature of the high-temperature lubricating oil decreases, and the temperature of the dilute dehumidifying solution increases by absorbing heat, causing some moisture to evaporate and transform into a concentrated dehumidifying solution (the dehumidifying effect of the concentrated dehumidifying solution on the air will be improved). The concentrated dehumidifying solution flows out of the second heat exchange pipeline and enters the first dehumidifier 1 through the inlet end of the first dehumidifier 1.

[0047] The high-temperature lubricating oil cools down in the second heat exchanger 12, and the cooled lubricating oil returns to the air compressor 2, ensuring the working temperature of the lubricating oil in the air compressor 2. Excessively high lubricating oil temperature will significantly reduce the working performance. Therefore, ensuring the working temperature of the lubricating oil in the air compressor 2 ensures working performance and reduces the oil consumption of the air compressor 2. Dehumidifying the air before it enters the air compressor 2 to a certain extent can reduce the energy consumption of the air compressor 2. This application recovers the waste heat of the lubricating oil separated by the oil separator and uses this waste heat to concentrate the dehumidification solution before it enters the air compressor 2 to a certain extent, thereby improving the dehumidification effect on the air.

[0048] The first heat exchange pipe and the second heat exchange pipe can transfer heat. The first heat exchange pipe can be inserted through the second heat exchange pipe, allowing the dehumidifying dilute solution to directly contact the outer wall of the second heat exchange pipe for heat exchange. Alternatively, the second heat exchange pipe can be inserted through the first heat exchange pipe, allowing the high-temperature lubricating oil to directly contact the outer wall of the first heat exchange pipe for heat exchange. The first and second heat exchange pipes can also be arranged side-by-side with their walls in contact. Alternatively, the heat dissipation fins on the first heat exchange pipe can contact the wall of the second heat exchange pipe, etc. This application does not impose any limitations.

[0049] In addition, the volume of the dehumidifying concentrate should be designed to ensure the dehumidification capacity during the initial operation phase. During the remaining time, it can be used for dehumidification while simultaneously generating the concentrate using the residual heat of the lubricating oil, thus achieving a stable circulation state for the system.

[0050] like Figure 1 As shown, in the air compressor system with waste heat recovery according to an embodiment of the present invention, a first temperature and humidity sensor 18 is provided on the pipeline connecting the first heat exchange pipeline and the air compressor 2, a first control valve 19 is provided on the pipeline connecting the oil-gas separator 3 and the air compressor 2, and a second control valve 20 is provided on the pipeline connecting the outlet end of the first dehumidifier 1 and the second heat exchange pipeline. The opening degree of the first control valve 19 and the second control valve 20 is adjustable.

[0051] To elaborate, the first temperature and humidity sensor 18 is used to detect the temperature of the lubricating oil after heat exchange with the dehumidifying dilute solution. The opening of the first control valve 19 is adjustable, and the flow rate of the lubricating oil entering the second heat exchanger 12 can be controlled by adjusting the opening of the first control valve 19. The opening of the second control valve 20 is also adjustable, and the flow rate of the dehumidifying dilute solution entering the second heat exchanger 12 can be controlled by adjusting the opening of the second control valve 20.

[0052] In one specific embodiment, the temperature of the lubricating oil entering the air compressor 2 is monitored. When the first temperature and humidity sensor 18 detects that the temperature of the lubricating oil is too high, the opening of the second control valve 20 is increased to increase the flow rate of the dehumidifying solution, and / or the opening of the first control valve 19 is decreased without affecting the operation of the air compressor 2 to reduce the flow rate of the lubricating oil. When the first temperature and humidity sensor 18 detects that the temperature of the lubricating oil is too low, the opening of the second control valve 20 is decreased to reduce the flow rate of the dehumidifying solution, and / or the opening of the first control valve 19 is increased to increase the flow rate of the lubricating oil, thereby keeping the temperature of the lubricating oil entering the air compressor 2 within a suitable temperature range.

[0053] It should be noted that the first temperature and humidity sensor 18 is mainly used to measure temperature. Therefore, setting the first temperature and humidity sensor 18 as the first temperature sensor can also achieve the effect of this application. This application is not limited to the type of sensor, as long as it can measure the temperature of lubricating oil.

[0054] A second liquid storage tank 2216 and a second pump body 15 are provided on the pipeline connecting the outlet end of the first dehumidifier 1 and the second heat exchange pipeline. The second liquid storage tank 2216 is connected to the outlet end of the first dehumidifier 1, and the second pump body 15 is connected to the second heat exchange pipeline. A second control valve 20 is provided on the pipeline connecting the second liquid storage tank 2216 and the second pump body 15. A fourth control valve 21 is provided on the pipeline connecting the first dehumidifier 1 and the second liquid storage tank 2216. The fourth control valve 21 can control the outflow rate of the dehumidifying solution in the first dehumidifier 1. When the heat exchange rate between the dehumidifying solution and the lubricating oil in the second heat exchanger 12 cannot match the outflow rate of the dehumidifying solution, the dehumidifying solution can be stored in the second liquid storage tank 2216. The second pump body 15 provides the power to send the dehumidifying solution into the second heat exchange pipeline.

[0055] like Figure 1 As shown, in some embodiments, the second heat exchanger 12 is provided with a first heating section 13, which is used to heat the second heat exchange pipeline. By turning on the first heating section 13, the second heat exchange pipeline can be heated, thereby increasing the rate at which the dilute dehumidifying solution generates the concentrated dehumidifying solution, and thus improving the dehumidification effect of the first dehumidifier 1 on the air entering the air compressor 2.

[0056] The first heating part 13 can be configured as a resistance wire wound around the second heat exchange pipeline, or it can be configured as an electric heating tube extending into the second heat exchange pipeline, etc. This application does not impose any restrictions.

[0057] To better control the humidity of the air entering the air compressor 2 and keep it within a suitable range, it is necessary to monitor the humidity of the air after dehumidification by the first dehumidifier 1 to determine the humidity of the air entering the air compressor 2. In some embodiments, a second temperature and humidity sensor 35 is installed on the pipeline connecting the first dehumidifier 1 and the air compressor 2. Thus, by monitoring the humidity of the dehumidified air in the first dehumidifier 1 (or the air entering the air compressor 2) through the second temperature and humidity sensor 35, if the air humidity does not meet the requirements, the opening of the first control valve 19 and the second control valve 20 can be adjusted, or the first heating unit 13 can be activated to heat the second heat exchange pipeline, thereby increasing the production rate of the dehumidification concentrate and improving the dehumidification effect of the first dehumidifier 1.

[0058] Specifically, in one embodiment, the following control logic can be used for control:

[0059] The relative humidity range of the air entering the air compressor 2 after dehumidification is set to △a. Since the ambient humidity is not a constant value, the concentration of the dehumidifying solution required to dehumidify the air to the relative humidity range △a is also different. In addition, the heat exchange between the lubricating oil and the dilute dehumidifying solution is limited. When the second temperature and humidity sensor 35 detects that the humidity value of the dehumidified air is a1, and a1 is greater than or equal to the maximum humidity value of the relative humidity range △a (that is, the first maximum preset humidity), the first heating part 13 is controlled to turn on, thereby increasing the concentration of the dehumidifying solution in the second heat exchange pipeline, so that the relative humidity of the air after dehumidification by the first dehumidifier 1 is stabilized within the relative humidity range △a.

[0060] When the first heating unit 13 is running, when the second temperature and humidity sensor 35 detects that the humidity value a2 of the air after dehumidification by the first dehumidifier 1 is less than the maximum humidity value, it controls the first heating unit 13 to stop running. The conversion of the dehumidification dilute solution to the dehumidification concentrated solution relies solely on the residual heat of the lubricating oil.

[0061] It should be noted that the second temperature and humidity sensor 35 is mainly used to measure humidity. Therefore, setting the second temperature and humidity sensor 35 as the second humidity sensor can also achieve the effect of this application. This application is not limited to the type of sensor, as long as it can measure air humidity.

[0062] like Figure 1As shown, in some embodiments, a first storage tank 16 and a first pump body 17 are sequentially connected in the third flow path. The first storage tank 16 and the first pump body 17 are located between the outlet end of the first dehumidifier 1 and the second heat exchange pipeline. The dilute dehumidifying solution flowing out of the second heat exchanger 12 can be stored in the first storage tank 16, and then transported to the first dehumidifier 1 via the first pump body 17. This allows for buffering of the concentrated dehumidifying solution when the efficiency of the concentrated dehumidifying solution generation in the second heat exchanger 12 and the efficiency of the dilute dehumidifying solution in the first dehumidifier 1 are mismatched. The first pump body 17 provides the power to deliver the concentrated dehumidifying solution from the first storage tank 16 into the first dehumidifier 1. Without the first pump body 17, gravity due to height difference or siphon can be used, but this requires a more sophisticated structural design.

[0063] A third control valve 14 is provided on the pipeline connecting the first liquid storage tank 16 and the second heat exchanger 12. By controlling the opening degree of the third control valve 14, the residence time of the dehumidification concentrated solution in the second heat exchanger 12 can be controlled.

[0064] Example 1:

[0065] The air compressor system with waste heat recovery according to an embodiment of the present invention further includes a first reversing valve, a second reversing valve, and a third reversing valve. The first heat exchanger 4 includes a third heat exchange pipeline and a fourth heat exchange pipeline, which are capable of heat transfer. The second dehumidifier 9 includes a first dehumidification chamber 24 and a second dehumidification chamber 33, both of which are used to hold an adsorbent. The first reversing valve includes a first port, a second port, a third port, and a fourth port. The first dehumidification chamber 24 is connected to the first port, and the second dehumidification chamber 33 is connected to the second port. The fourth heat exchange pipeline and the third heat exchange pipeline... The third port is connected to the fourth port, which is used to connect to the indoor environment. The third port can be connected to the first, second, and fourth ports respectively. The second reversing valve includes the fifth, sixth, and seventh ports, and the third reversing valve includes the eighth, ninth, and tenth ports. The fifth port is connected to the third heat exchange pipeline, the sixth port is connected to the first dehumidification chamber 24, the seventh port is connected to the eighth port, the ninth port is connected to the second dehumidification chamber 33, and the tenth port is connected to the air storage tank 11. The fifth, sixth, seventh, eighth, and tenth ports are connected in sequence, or the fifth, seventh, eighth, ninth, and tenth ports are connected in sequence.

[0066] To elaborate, in the first heat exchanger 4, the high-temperature compressed gas flowing out of the oil-gas separator 3 enters the third heat exchange pipeline and exchanges heat with the medium in the fourth heat exchange pipeline. The high-temperature compressed gas releases heat and its temperature decreases. After the temperature decreases, it enters the second dehumidifier 9 for dehumidification.

[0067] The second dehumidifier 9 includes a first dehumidification chamber 24 and a second dehumidification chamber 33. Taking the initial entry of compressed gas into the first dehumidification chamber 24 for dehumidification as an example, at this time, ports five, six, seven, eight, and ten are sequentially opened to form a flow path. The compressed gas enters the first dehumidification chamber 24 where the adsorbent absorbs the moisture in the gas, reducing the humidity. Afterward, it is discharged into the air storage tank 11. After the compressed air has been dehumidified in the first dehumidification chamber 24 for a period of time, ports five, seven, eight, nine, and ten are sequentially opened, and the compressed gas enters the second dehumidification chamber 33 where the adsorbent absorbs the moisture in the gas, reducing the humidity. Afterward, it is discharged into the air storage tank 11.

[0068] While the compressed gas dehumidifies the second dehumidification chamber 33, the third port connects to the first port, transporting the heated medium from the fourth heat exchange pipeline to the first dehumidification chamber 24. The residual heat is used to desorb the adsorbent, restoring its adsorption capacity. In one specific embodiment, the medium is air. Using air as the heat exchange medium is inexpensive.

[0069] Understandably, after the compressed air is dehumidified in the second dehumidification chamber 33 for a period of time, the fifth, sixth, seventh, eighth and tenth ports are sequentially connected to form a flow path. The compressed gas enters the first dehumidification chamber 24 and the adsorbent adsorbs the moisture in the gas to reduce the humidity. Then it is discharged into the gas storage tank 11. At this time, the third port is connected to the second port, and the medium heated in the fourth heat exchange pipeline is transported to the second dehumidification chamber 33. The residual heat is used to desorb the adsorbent and restore the adsorption capacity of the adsorbent.

[0070] During initial operation, when the medium in the fourth heat exchanger is not needed, the third port and the fourth port can be connected so that the heated medium can be directly discharged back into the surrounding air.

[0071] Example 2:

[0072] like Figure 1As shown, in the air compressor system with waste heat recovery according to an embodiment of the present invention, the first heat exchanger 4 includes a third heat exchange pipeline and a fourth heat exchange pipeline, which can transfer heat. The second dehumidifier 9 includes a first dehumidification chamber 24, a second dehumidification chamber 33, a first air inlet channel, a second air inlet channel, a third air inlet channel, a fourth air inlet channel, a first exhaust channel, a second exhaust channel, a third exhaust channel, and a fourth exhaust channel. Both the first dehumidification chamber 24 and the second dehumidification chamber 33 are used to place adsorbent. The first air inlet channel connects the fourth heat exchange pipeline and the first dehumidification chamber 24. The first exhaust channel connects the first dehumidification chamber 24 and the indoor environment. The second air inlet channel... The third heat exchange pipeline connects to the first dehumidification chamber 24. The second exhaust channel connects to the first dehumidification chamber 24 and the air storage tank 11. The third air intake channel connects to the fourth heat exchange pipeline and the second dehumidification chamber 33. The third exhaust channel connects to the second dehumidification chamber 33 and the indoor environment. The fourth air intake channel connects to the third heat exchange pipeline and the second dehumidification chamber 33. The fourth exhaust channel connects to the second dehumidification chamber 33 and the air storage tank 11. The first air intake channel is equipped with a first air intake valve 30. The second air intake channel is equipped with a second air intake valve 5. The second exhaust channel is equipped with a second exhaust valve 6. The third air intake channel is equipped with a third air intake valve 31. The fourth air intake channel is equipped with a fourth air intake valve 7. The fourth exhaust channel is equipped with a fourth exhaust valve 8.

[0073] In other words, in the first heat exchanger 4, the high-temperature compressed gas flowing out of the oil-gas separator 3 enters the third heat exchange pipeline and exchanges heat with the medium in the fourth heat exchange pipeline. The high-temperature compressed gas releases heat and its temperature decreases. After the temperature decreases, it enters the second dehumidifier 9 for dehumidification.

[0074] The second dehumidifier 9 includes a first dehumidification chamber 24 and a second dehumidification chamber 33. Taking the initial compressed gas entering the first dehumidification chamber 24 for dehumidification as an example, at this time, the second intake valve 5 and the second exhaust valve 6 are open, and the fourth intake valve 7 and the fourth exhaust valve 8 are closed. The compressed gas enters the first dehumidification chamber 24 and the adsorbent adsorbs the moisture in the gas to reduce the humidity. Then it is discharged into the gas storage tank 11.

[0075] After the compressed air is dehumidified in the first dehumidification chamber 24 for a period of time, the fourth intake valve 7 and the fourth exhaust valve 8 are opened, and the second intake valve 5 and the second exhaust valve 6 are closed. The compressed gas enters the second dehumidification chamber 33 and the adsorbent absorbs the moisture in the gas to reduce the humidity. Then it is discharged into the air storage tank 11.

[0076] While the compressed gas dehumidifies in the second dehumidification chamber 33, the first inlet valve 30 opens and the third inlet valve 31 closes, allowing the heated medium in the fourth heat exchange pipeline to be transported to the first dehumidification chamber 24. The residual heat is then used to desorb the adsorbent, restoring its adsorption capacity. In one specific embodiment, the medium is air. Using air as the heat exchange medium is inexpensive.

[0077] Understandably, after the compressed air is dehumidified in the second dehumidification chamber 33 for a period of time, the second intake valve 5 and the second exhaust valve 6 are opened, and the fourth intake valve 7 and the fourth exhaust valve 8 are closed. The compressed gas enters the first dehumidification chamber 24 and the adsorbent adsorbs the moisture in the gas to reduce the humidity. Then it is discharged into the storage tank 11. At this time, the third intake valve 31 is opened and the first intake valve 30 is closed, and the heated medium in the fourth heat exchange pipeline is transported to the second dehumidification chamber 33. The residual heat is used to desorb the adsorbent and restore the adsorption capacity of the adsorbent.

[0078] The second dehumidifier 9 is also equipped with a first exhaust passage and a third exhaust passage, both of which are connected to the external environment. The first exhaust passage is equipped with a first exhaust valve 23, and the third exhaust passage is equipped with a third exhaust valve 34. When the fourth heat exchange pipe is connected to the first dehumidification chamber 24, the first exhaust valve 23 is opened to allow the moisture-absorbing air to be discharged into the environment through the first dehumidification chamber 24. When the fourth heat exchange pipe is connected to the second dehumidification chamber 33, the second exhaust valve 6 is opened to allow the moisture-absorbing air to be discharged through the third exhaust passage.

[0079] According to an embodiment of the present invention, the air compressor system with waste heat recovery can exchange heat between natural air and compressed gas. The natural air heated by the heat exchange can desorb the adsorbent in the second dehumidifier 9, thereby regenerating the adsorbent.

[0080] like Figure 1 As shown, in some embodiments, a third temperature and humidity sensor 10 is provided at the air inlet of the gas storage tank 11. The third temperature and humidity sensor 10 is used to detect the humidity of the compressed gas after it has been dehumidified by the second dehumidifier 9, so as to observe whether the humidity of the compressed gas meets the requirements.

[0081] It should be noted that the third temperature and humidity sensor 10 is mainly used to measure humidity. Therefore, setting the first temperature and humidity sensor 18 as the third humidity sensor can also achieve the effect of this application. This application is not limited to the type of sensor, as long as it can measure air humidity.

[0082] In one specific embodiment, the humidity control logic of the compressed gas is illustrated by the fact that the compressed gas in the third heat exchange pipeline first enters the first dehumidification chamber 24 for dehumidification:

[0083] In Example 1, when the detected gas humidity is greater than or equal to the second maximum preset humidity, it indicates that the adsorbent in the first dehumidification chamber 24 has reduced energy absorption capacity and cannot meet the requirements. The fifth, seventh, eighth, ninth and tenth ports are sequentially opened, and the compressed gas enters the second dehumidification chamber 33 where the adsorbent adsorbs the moisture in the gas to reduce the humidity. After that, the gas is discharged into the gas storage tank 11. The third port is connected to the first port, and the heated medium in the fourth heat exchange pipeline is transported to the first dehumidification chamber 24. The residual heat is used to desorb the adsorbent and restore the adsorption capacity of the adsorbent.

[0084] In Example 2, when the detected gas humidity is greater than or equal to the second maximum preset humidity, it indicates that the adsorbent in the first dehumidification chamber 24 has reduced energy absorption capacity and cannot meet the requirements. The fourth intake valve 7 and the fourth exhaust valve 8 are opened, while the second intake valve 5 and the second exhaust valve 6 are closed. Compressed gas enters the second dehumidification chamber 33, where the adsorbent adsorbs the moisture in the gas to reduce humidity, and then it is discharged into the gas storage tank 11. While the compressed gas is dehumidifying in the second dehumidification chamber 33, the first intake valve 30 is opened and the third intake valve 31 is closed. The heated medium in the fourth heat exchange pipeline is transported to the first dehumidification chamber 24, and the residual heat is used to desorb the adsorbent and restore its adsorption capacity.

[0085] In some embodiments, a first temperature and humidity sensor 25 is provided at the outlet of the fourth heat exchange pipeline.

[0086] The first temperature and humidity sensor 25 is used to detect the temperature of the medium after heat exchange with the high-temperature compressed gas, and can determine its desorption capacity for the adsorbent in the first dehumidification chamber 24 or the second dehumidification chamber 33 based on the temperature of the medium, or control the heat exchange time between the medium and the high-temperature compressed gas based on it.

[0087] The first temperature and humidity sensor 25 is mainly used to measure temperature. Therefore, setting the first temperature and humidity sensor 25 as the fourth temperature sensor can also achieve the effect of this application. This application is not limited to the type of sensor, as long as it can measure air humidity.

[0088] Example 3:

[0089] The fourth heat exchange pipe and the second dehumidifier 9 are connected by a first air pipe, and a second heating element 28 is provided on the first air pipe. The second heating element 28 can heat the first air pipe.

[0090] The second heating part 28 can be configured as a resistance wire wound around the second heat exchange pipeline, or it can be configured as an electric heating tube extending into the second heat exchange pipeline, etc. This application does not impose any restrictions.

[0091] In one specific embodiment, the second heating element 28 can be controlled using the following control logic:

[0092] When the temperature of the medium after heat exchange with the high-temperature compressed gas is greater than the minimum preset air temperature, it indicates that the adsorbent can be desorbed by relying on the temperature of the medium, and the second heating part 28 remains in the off state.

[0093] When the temperature of the medium after heat exchange with the high-temperature compressed gas is detected to be less than or equal to the minimum preset air temperature, the second heating unit 28 is turned on to heat up the medium and improve its desorption capacity.

[0094] During the operation of the second heating unit 28, if the temperature of the medium is detected to be greater than the minimum preset air temperature, the second heating unit 28 is controlled to shut down.

[0095] Example 4:

[0096] like Figure 1 As shown, a second air pipe is provided between the fourth heat exchange pipeline and the second dehumidifier 9. The first air pipe and the second air pipe are connected in parallel. The inlet end and outlet end of the first air pipe are respectively provided with a first switch valve 27 and a second switch valve 29. The second air pipe is provided with a third switch valve 26.

[0097] In other words, when the first switch valve 27 and the second switch valve 29 are open and the third switch valve 26 is closed, the medium flows into the second dehumidifier 9 through the first gas pipe from the fourth heat exchange pipe. When the first switch valve 27 and the second switch valve 29 are closed and the third switch valve 26 is open, the medium flows into the second dehumidifier 9 through the second gas pipe from the fourth heat exchange pipe.

[0098] In one specific embodiment, the opening and closing of the second heating unit 28, the first switching valve 27, the second switching valve 29, and the third switching valve 26 can be controlled using the following control logic:

[0099] When the third switch valve 26 is in the open state, and the temperature of the medium after heat exchange with the high-temperature compressed gas is greater than the minimum preset temperature, as detected by the first temperature and humidity sensor 25, it indicates that the adsorbent can be desorbed by relying on the temperature of the medium. The second heating part 28, the first switch valve 27 and the second switch valve 29 remain in the closed state.

[0100] When the temperature of the medium after heat exchange with the high-temperature compressed gas is detected to be less than or equal to the minimum preset air temperature, the second heating unit 28, the first switching valve 27 and the second switching valve 29 are controlled to open, and the third switching valve 26 is controlled to close, so as to heat up the medium and improve its desorption capacity.

[0101] During the opening of the second heating unit 28, the first switching valve 27, and the second switching valve 29, when the temperature of the medium is detected to be greater than the minimum preset air temperature, the second heating unit 28, the first switching valve 27, and the second switching valve 29 are controlled to close, and the third switching valve 26 is controlled to open.

[0102] like Figure 2 As shown, the control method according to an embodiment of the present invention is used to control the above-mentioned air compressor system with waste heat recovery, including:

[0103] S10: Monitor the real-time oil temperature of the lubricating oil flowing out of the second heat exchanger 12;

[0104] S12: Control the opening degree of the first control valve 19 and the second control valve 20 according to the real-time oil temperature.

[0105] In step S10, the real-time oil temperature of the lubricating oil flowing out of the second heat exchanger 12 can be monitored by the first temperature and humidity sensor 18, that is, the temperature of the lubricating oil after exchanging heat with the dehumidifying dilute solution.

[0106] In step S12, the flow rate of lubricating oil entering the second heat exchanger 12 can be controlled by adjusting the opening of the first control valve 19, and the flow rate of dehumidifying solution entering the second heat exchanger 12 can be controlled by adjusting the opening of the second control valve 20. When the real-time oil temperature detected by the first temperature and humidity sensor 18 exceeds the first preset value, the opening of the second control valve 20 is increased to increase the flow rate of the dehumidifying solution, and / or the opening of the first control valve 19 is decreased to reduce the flow rate of lubricating oil without affecting the operation of the air compressor 2. When the real-time oil temperature detected by the first temperature and humidity sensor 18 is lower than the second preset value, the opening of the second control valve 20 is decreased to reduce the flow rate of the dehumidifying solution, and / or the opening of the first control valve 19 is increased to increase the flow rate of lubricating oil, so that the temperature of the lubricating oil entering the air compressor 2 can be maintained within a suitable temperature range, wherein the first preset value is greater than the second preset value.

[0107] The control logic in step 12 may include various specific embodiments:

[0108] Example 5:

[0109] When the real-time oil temperature detected by the first temperature and humidity sensor 18 exceeds the first preset value, the opening of the second control valve 20 is increased to increase the flow rate of the dehumidifying solution. When the real-time oil temperature detected by the first temperature and humidity sensor 18 is lower than the second preset value, the opening of the second control valve 20 is decreased.

[0110] Example 6:

[0111] When the real-time oil temperature detected by the first temperature and humidity sensor 18 exceeds the first preset value, the opening of the second control valve 20 is increased to increase the flow rate of the dehumidifying solution. Without affecting the operation of the air compressor 2, the opening of the first control valve 19 is decreased to reduce the flow rate of the lubricating oil. When the real-time oil temperature detected by the first temperature and humidity sensor 18 is lower than the second preset value, the opening of the second control valve 20 is decreased.

[0112] Example 7:

[0113] When the real-time oil temperature detected by the first temperature and humidity sensor 18 exceeds the first preset value, the opening of the second control valve 20 is increased to increase the flow rate of the dehumidifying solution. Without affecting the operation of the air compressor 2, the opening of the first control valve 19 is decreased to reduce the flow rate of the lubricating oil. When the real-time oil temperature detected by the first temperature and humidity sensor 18 is lower than the second preset value, the opening of the second control valve 20 is decreased and the opening of the first control valve 19 is increased to increase the flow rate of the lubricating oil.

[0114] According to the control method of the present invention, the lubricating oil of the air compressor 2 can be kept within a suitable operating temperature range, thereby ensuring the lubrication and cooling performance of the lubricating oil, reducing the consumption of lubricating oil in the air compressor 2, reducing the equipment failure rate, realizing the primary utilization of energy, and at the same time, the generation rate of the dehumidification solution obtained by recovering the waste heat of the lubricating oil can be reasonably controlled.

[0115] like Figure 3 As shown, the control method according to an embodiment of the present invention further includes:

[0116] S20: Monitor the humidity of the first gas discharged from the first dehumidifier 1;

[0117] S22: When the humidity of the first gas is greater than or equal to the first maximum preset humidity, control the first heating unit 13 to turn on.

[0118] In step S20, the humidity of the first gas discharged from the first dehumidifier 1 can be monitored by the second temperature and humidity sensor 35.

[0119] In step S22, when the humidity of the first gas is greater than or equal to the first maximum preset humidity, it indicates that the humidity of the first gas does not meet the requirements and the dehumidification effect of the first dehumidifier 1 is not good. In other words, the concentration of the dehumidification solution is insufficient. The first heating unit 13 is controlled to turn on to heat the second heat exchange pipeline, thereby increasing the production rate of the dehumidification concentrated solution and thus improving the dehumidification effect of the first dehumidifier 1.

[0120] According to the control method of the present invention, by monitoring the humidity of the first gas discharged from the first dehumidifier 1, when the humidity of the first gas is greater than or equal to the first maximum preset humidity, that is, when the dehumidification effect of the first dehumidifier 1 is poor, the first heating unit 13 is controlled to turn on to heat the second heat exchange pipeline, thereby increasing the production rate of the dehumidification concentrate solution and thus improving the dehumidification effect of the first dehumidifier 1.

[0121] like Figure 4 As shown, in some embodiments, the control method further includes:

[0122] S30: When the third heat exchange pipeline, the first dehumidification chamber 24 and the gas storage tank 11 are sequentially connected, monitor the humidity of the second gas entering the gas storage tank 11;

[0123] S32: When the second gas humidity is greater than or equal to the second maximum preset humidity, control the third heat exchange pipeline, the second dehumidification chamber 33 and the gas storage tank 11 to be connected in sequence, and the fourth heat exchange pipeline and the first dehumidification chamber 24 to be connected.

[0124] In step S30, the humidity of the second gas entering the gas storage tank 11 is monitored by the third temperature and humidity sensor 10.

[0125] In step S32, when the humidity of the second gas is greater than or equal to the second maximum preset humidity, it indicates that the energy absorption capacity of the adsorbent in the first dehumidification chamber 24 has decreased and cannot meet the requirements. Therefore, the third heat exchange pipeline, the second dehumidification chamber 33, and the gas storage tank 11 are sequentially connected. In this way, the compressed gas can enter the second dehumidification chamber 33 for dehumidification, ensuring that the humidity of the compressed gas is less than the second maximum preset humidity. At the same time, the fourth heat exchange pipeline and the first dehumidification chamber 24 are connected, and the heated medium in the fourth heat exchange pipeline is transported to the first dehumidification chamber 24. The residual heat is used to desorb the adsorbent and restore the adsorption capacity of the adsorbent.

[0126] In Example 1, when the detected gas humidity is greater than or equal to the second maximum preset humidity, the fifth, seventh, eighth, ninth and tenth ports are sequentially turned on, and the compressed gas enters the second dehumidification chamber 33 where the adsorbent adsorbs the moisture in the gas to reduce the humidity. After that, the gas is discharged into the gas storage tank 11. The third port is connected to the first port, and the medium heated in the fourth heat exchange pipeline is transported to the first dehumidification chamber 24. The residual heat is used to desorb the adsorbent and restore the adsorption capacity of the adsorbent.

[0127] In Embodiment 2, the fourth intake valve 7 and the fourth exhaust valve 8 are opened, while the second intake valve 5 and the second exhaust valve 6 are closed. Compressed gas enters the second dehumidification chamber 33, where the adsorbent adsorbs the moisture in the gas, reducing the humidity. The gas is then discharged into the storage tank 11. While the compressed gas is being dehumidified in the second dehumidification chamber 33, the first intake valve 30 is opened, and the third intake valve 31 is closed. The heated medium in the fourth heat exchange pipeline is transported to the first dehumidification chamber 24, where residual heat is used to desorb the adsorbent and restore its adsorption capacity.

[0128] According to the control method of this embodiment, by monitoring the humidity of the second gas entering the gas storage tank 11, when the humidity of the second gas is greater than or equal to the second maximum preset humidity, the third heat exchange pipeline, the second dehumidification chamber 33 and the gas storage tank 11 are sequentially connected. In this way, the compressed gas can enter the second dehumidification chamber 33 for dehumidification, ensuring that the humidity of the compressed gas is less than the second maximum preset humidity. At the same time, the fourth heat exchange pipeline and the first dehumidification chamber 24 are connected, and the heated medium in the fourth heat exchange pipeline is transported to the first dehumidification chamber 24. The residual heat is used to desorb the adsorbent and restore the adsorption capacity of the adsorbent.

[0129] like Figure 5 As shown, in some embodiments, the control method further includes:

[0130] S40: Monitor the air temperature discharged from the fourth heat exchange pipeline;

[0131] S42: When the air temperature is less than or equal to the minimum preset air temperature, control the first switching valve 27, the second switching valve 29 and the second heating unit 28 to open, and control the third switching valve 26 to close.

[0132] In step S40, the third switching valve 26 is in the open state, and the temperature of the air discharged from the fourth heat exchange pipeline can be monitored by the first temperature and humidity sensor 25.

[0133] In step S42, when the air temperature is less than or equal to the minimum preset air temperature, it indicates that the temperature after the air exchanges heat with the high-temperature compressed gas cannot meet the requirements for adsorbent desorption. Therefore, the first switch valve 27, the second switch valve 29 and the second heating unit 28 are opened, and the third switch valve 26 is closed. The air is heated by the second heating unit 28 to increase the air temperature, thereby improving the air's ability to desorb the adsorbent.

[0134] According to the control method of the present invention, the opening of the first switching valve 27, the second switching valve 29 and the second heating unit 28 are controlled by monitoring the air temperature discharged from the fourth heat exchange pipeline, thereby ensuring the air's desorption capacity of the adsorbent and thus ensuring the adsorbent's dehumidification capacity of the compressed gas.

[0135] The air compressor system with waste heat recovery provided in this application should be understood to be terminology used only for describing particular exemplary embodiments and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a specific order described or illustrated, unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0136] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0137] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An air compressor system with waste heat recovery, characterized in that, include: The system comprises a first dehumidifier, an air compressor, an oil-gas separator, a first heat exchanger, a second dehumidifier, a first reversing valve, a second reversing valve, a third reversing valve, an air receiver, and a second heat exchanger. The second heat exchanger includes a first heat exchange pipeline and a second heat exchange pipeline, which are capable of heat transfer. The first dehumidifier, the air compressor, the oil-gas separator, the first heat exchanger, the second dehumidifier, and the air receiver are sequentially connected to form a first flow path. The oil-gas separator, the first heat exchange pipeline, and the air compressor are sequentially connected to form a second flow path. The outlet end of the first dehumidifier, the second heat exchange pipeline, and the inlet end of the first dehumidifier are sequentially connected to form a third flow path. The first heat exchanger includes a third heat exchange pipeline and a fourth heat exchange pipeline, which are capable of heat transfer. The second dehumidifier includes a first dehumidification chamber and a second dehumidification chamber. A reversing valve includes a first port, a second port, a third port, and a fourth port. The first dehumidification chamber is connected to the first port, the second dehumidification chamber is connected to the second port, and the fourth heat exchange pipeline is connected to the third port. The fourth port is used to connect to the indoor environment. The third port can be connected to the first port, the second port, and the fourth port respectively. The second reversing valve includes a fifth port, a sixth port, and a seventh port. The third reversing valve includes an eighth port, a ninth port, and a tenth port. The fifth port is connected to the third heat exchange pipeline, the sixth port is connected to the first dehumidification chamber, the seventh port is connected to the eighth port, the ninth port is connected to the second dehumidification chamber, and the tenth port is connected to the gas storage tank. The fifth port, the sixth port, the seventh port, the eighth port, and the tenth port are connected sequentially, or the fifth port, the seventh port, the eighth port, the ninth port, and the tenth port are connected sequentially.

2. The air compressor system with waste heat recovery according to claim 1, characterized in that, A first temperature and humidity sensor is provided on the pipeline connecting the first heat exchange pipeline and the air compressor. A first control valve is provided on the pipeline connecting the oil-gas separator and the air compressor. A second control valve is provided on the pipeline connecting the outlet end of the first dehumidifier and the second heat exchange pipeline. The opening degree of the first control valve and the second control valve is adjustable.

3. The air compressor system with waste heat recovery according to claim 2, characterized in that, The second heat exchanger is provided with a first heating section, which is used to heat the second heat exchange pipeline.

4. The air compressor system with waste heat recovery according to claim 3, characterized in that, A second temperature and humidity sensor is installed on the pipeline connecting the first dehumidifier and the air compressor, and / or The third flow path is also provided with a first liquid storage tank and a first pump body connected in sequence. The first liquid storage tank and the first pump body are located between the outlet end of the first dehumidifier and the second heat exchange pipeline.

5. The air compressor system with waste heat recovery according to claim 1, characterized in that, The first heat exchanger includes a third heat exchange pipe and a fourth heat exchange pipe, which are capable of heat transfer. The second dehumidifier includes a first dehumidification chamber, a second dehumidification chamber, a first air inlet channel, a second air inlet channel, a third air inlet channel, a fourth air inlet channel, a first exhaust channel, a second exhaust channel, a third exhaust channel, and a fourth exhaust channel. The first air inlet channel connects the fourth heat exchange pipe and the first dehumidification chamber. The first exhaust channel connects the first dehumidification chamber and the indoor environment. The second air inlet channel connects the third heat exchange pipe and the first dehumidification chamber. The second exhaust channel connects to the [other components / areas]. The first dehumidification chamber and the air storage tank are described. The third air inlet channel connects the fourth heat exchange pipeline and the second dehumidification chamber. The third exhaust channel connects the second dehumidification chamber and the indoor environment. The fourth air inlet channel connects the third heat exchange pipeline and the second dehumidification chamber. The fourth exhaust channel connects the second dehumidification chamber and the air storage tank. The first air inlet channel is equipped with a first air inlet valve. The second air inlet channel is equipped with a second air inlet valve. The second exhaust channel is equipped with a second exhaust valve. The third air inlet channel is equipped with a third air inlet valve. The fourth air inlet channel is equipped with a fourth air inlet valve. The fourth exhaust channel is equipped with a fourth exhaust valve.

6. The air compressor system with waste heat recovery according to claim 3, characterized in that, A third temperature and humidity sensor is provided at the air inlet of the gas storage tank, and / or a fourth temperature and humidity sensor is provided at the outlet of the fourth heat exchange pipeline.

7. The air compressor system with waste heat recovery according to claim 6, characterized in that, The fourth heat exchange pipeline and the second dehumidifier are connected by a first air pipe, and the first air pipe is provided with a second heating element.

8. The air compressor system with waste heat recovery according to claim 7, characterized in that, A second air pipe is also provided between the fourth heat exchange pipeline and the second dehumidifier. The first air pipe and the second air pipe are connected in parallel. The inlet end and outlet end of the first air pipe are respectively provided with a first switch valve and a second switch valve. The second air pipe is provided with a third switch valve.

9. A control method, characterized in that, For controlling the air compressor system with waste heat recovery as described in claim 8, comprising: Monitor the real-time oil temperature of the lubricating oil flowing out of the second heat exchanger; The opening degree of the first control valve and the second control valve is controlled according to the real-time oil temperature.

10. The control method according to claim 9, characterized in that, Also includes: Monitor the humidity of the first gas discharged from the first dehumidifier; When the humidity of the first gas is greater than or equal to the first maximum preset humidity, the first heating element is turned on.

11. The control method according to claim 9, characterized in that, Also includes: When the third heat exchange pipeline, the first dehumidification chamber and the gas storage tank are connected in sequence, the humidity of the second gas entering the gas storage tank is monitored. When the humidity of the second gas is greater than or equal to the second maximum preset humidity, the third heat exchange pipeline, the second dehumidification chamber and the gas storage tank are sequentially connected, and the fourth heat exchange pipeline and the first dehumidification chamber are connected.

12. The control method according to claim 11, characterized in that, Also includes: Monitor the air temperature discharged from the fourth heat exchange pipeline; When the air temperature is less than or equal to the minimum preset air temperature, the first switching valve, the second switching valve, and the second heating element are opened, and the third switching valve is closed.

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