Fresh air series energy-saving system of regeneration and desorption drying system

Abstract

According to the fresh air series energy-saving system of the regeneration and desorption drying system, a heat pump system comprises an evaporator and a condenser which form circulation, the evaporator is arranged on the downstream portion of a first fan on a regeneration air pipeline, and the condenser is arranged on the upstream portion of a desorption area on the regeneration air pipeline; the air return pipeline is communicated with the fresh air pipeline and located on the upstream of the adsorption area, and a second valve for controlling flow is arranged on the air return pipeline. According to the fresh air series energy-saving system of the regeneration and desorption drying system, heat of air led out of the desorption area can be transmitted to air in front of the desorption area through work of the heat pump system, and energy waste is avoided; the input end of the fresh air pipeline is communicated to the output end of the regenerated air pipeline to receive low-temperature and low-humidity air output from the output end of the regenerated air pipeline, fresh air with the temperature and the humidity reaching the standard is formed, kinetic energy waste of regenerated air is avoided, and composition of the fresh air can be adjusted through control of the first valve and the second valve.

Description

Technical Field

[0001] This utility model relates to the field of rotary dehumidification, and in particular to a regeneration and desorption drying system with a fresh air series energy-saving system. Background Technology

[0002] The working principle of a dehumidifying rotor is primarily based on adsorption and desorption processes. The rotor is filled with highly efficient moisture-absorbing material, and its structure is mainly made of porous adsorption material. The rotor is divided into multiple sectors, each filled with a highly efficient adsorbent, such as silica gel or molecular sieves. The choice of adsorbent depends on the specific application environment and humidity requirements to ensure optimal dehumidification. When humid air passes through the adsorption zone, the moisture-absorbing material adsorbs the moisture in the air, making the air dry. As the rotor rotates, the area that has adsorbed moisture enters the desorption zone, where hot air generated by a heater evaporates the moisture in the moisture-absorbing material, thus restoring its moisture-absorbing capacity.

[0003] During the regeneration process of the desorption zone, the heat and kinetic energy of the regenerated hot air are wasted, which in turn increases the operation and maintenance costs of the entire system. Utility Model Content

[0004] The main purpose of this utility model is to provide a fresh air series energy-saving system for regeneration and desorption drying system, which aims to solve the problem that in the process of regeneration in the desorption zone of the rotary dehumidifier system, the heat and kinetic energy of the regenerated hot air are wasted, which leads to the increase in the operation and maintenance cost of the entire system.

[0005] To achieve the above objectives, this utility model provides a regeneration and desorption drying system with a series connection of fresh air for energy saving, comprising:

[0006] A rotary adsorption device includes a rotary wheel with an adsorption zone and a desorption zone;

[0007] A regenerated air duct is provided through the desorption zone. A first surface cooler is provided upstream of the desorption zone, and a first fan and a second surface cooler are sequentially provided downstream of the desorption zone. A first valve for controlling the flow rate is provided on the regenerated air duct.

[0008] A heat pump system includes an evaporator and a condenser forming a cycle, the evaporator being located downstream of the first fan on the regeneration air duct, and the condenser being located upstream of the desorption zone on the regeneration air duct.

[0009] A fresh air duct is connected to the output end of the regenerated air duct. The fresh air duct passes through the adsorption zone and is equipped with a second fan and a third surface cooler downstream.

[0010] The return air duct is connected to the fresh air duct located upstream of the adsorption zone, and a second valve for controlling the flow rate is installed on the return air duct.

[0011] Furthermore, a distribution bypass is provided corresponding to the regenerated air duct. The distribution bypass is connected from downstream of the first surface cooler of the regenerated air duct to downstream of the second surface cooler. A third valve for controlling the flow rate is provided on the distribution bypass.

[0012] Furthermore, the first valve is linked with the third valve.

[0013] Furthermore, the air distribution bypass runs in parallel and is connected to the regenerated air duct.

[0014] Furthermore, the regeneration and desorption drying system's fresh air series energy-saving system also includes a secondary rotary adsorption device, which includes a secondary rotary wheel with a secondary adsorption zone and a secondary desorption zone. The secondary adsorption zone is located downstream of the rotary adsorption device on the fresh air duct, and the secondary desorption zone is located upstream of the rotary adsorption device and downstream of the condenser on the regeneration air duct.

[0015] Furthermore, the regeneration and desorption drying system's fresh air series energy-saving system also includes a secondary rotary adsorption device, which includes a secondary rotary wheel with a secondary adsorption zone and a secondary desorption zone. The secondary adsorption zone is located downstream of the rotary adsorption device on the fresh air duct, and the secondary desorption zone is located upstream of the rotary adsorption device on the regeneration air duct. The condenser includes a first condenser and a second condenser connected in series, with the first condenser located upstream of the secondary desorption zone and the second condenser located between the secondary desorption zone and the desorption zone.

[0016] Furthermore, a perforated first filter is provided at the beginning of the regenerated air duct.

[0017] Furthermore, an adsorption-type second filter is installed at the end of the fresh air duct.

[0018] Furthermore, both the first valve and the second valve are electrically controlled valves.

[0019] Furthermore, temperature sensors are installed on the regeneration air duct upstream and downstream of the desorption zone.

[0020] The regeneration and desorption drying system provided by this utility model features a series-connected energy-saving system for fresh air. At the first surface cooler, the humidity and temperature of the regenerated air decrease. After passing through the condenser, the air temperature increases, regenerating the adsorbent in the desorption zone and transforming it into humid, hot air. After passing through the evaporator, the temperature and humidity of the humid, hot air partially decrease again. At the second surface cooler, the temperature and humidity further decrease. A heat pump system transfers the heat from the air extracted from the desorption zone to the air before the desorption zone, avoiding energy waste. The inlet of the fresh air duct connects to the outlet of the regeneration air duct, receiving air with lower temperature and humidity from the regeneration air duct outlet. This air continues to pass through the adsorption zone and the third surface cooler, forming fresh air with acceptable temperature and humidity, thus avoiding energy waste in the regeneration air. The total amount of fresh air output from the fresh air duct is the sum of the airflow input from the return air duct and the airflow input from the regeneration air duct. The composition of the fresh air can be adjusted by controlling the first and second valves. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first embodiment of the regeneration and desorption drying system, a fresh air series energy-saving system;

[0022] Figure 2 This is a schematic diagram of the second embodiment of the regeneration and desorption drying system, specifically the fresh air series energy-saving system.

[0023] Figure 3 This is a schematic diagram of the fresh air series energy-saving system of the regeneration and desorption drying system according to the third embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the fresh air series energy-saving system of the regeneration and desorption drying system according to the fourth embodiment of this utility model.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0027] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0028] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0029] Reference Figures 1 to 4 In one embodiment of this utility model, a regeneration and desorption drying system with connected fresh air provides energy saving, comprising:

[0030] The rotary adsorption device 100 includes a rotary wheel with an adsorption zone 110 and a desorption zone 120.

[0031] A regeneration air duct 200 is provided through the desorption zone 120. A first surface cooler 210 is provided upstream of the desorption zone 120, and a first fan 220 and a second surface cooler 230 are sequentially provided downstream of the desorption zone 120. A first valve 240 for controlling the flow rate is provided on the regeneration air duct 200.

[0032] The heat pump system 300 includes an evaporator 310 and a condenser 320 forming a cycle. The evaporator 310 is located downstream of the first fan 220 on the regeneration air duct 200, and the condenser 320 is located upstream of the desorption zone 120 on the regeneration air duct 200.

[0033] The input end of the fresh air duct 400 is connected to the output end of the regenerated air duct 200. The fresh air duct 400 passes through the adsorption zone 110 and is provided downstream with a second fan 410 and a third surface cooler 420.

[0034] The return air duct 500 is connected to the fresh air duct 400 located upstream of the adsorption zone 110, and a second valve 510 for controlling the flow rate is provided on the return air duct 500.

[0035] In existing technologies, during the regeneration process of the desorption zone, the heat and kinetic energy of the regenerated hot air are wasted, which in turn increases the operation and maintenance costs of the entire system.

[0036] In this utility model, the regeneration and desorption drying system with fresh air series energy-saving system includes a rotary adsorption device 100, a regeneration air duct 200, a heat pump system 300, a fresh air duct 400, and a return air duct 500.

[0037] The rotary adsorption device 100 includes a rotary wheel with an adsorption zone 110 and a desorption zone 120. In the adsorption zone 110, the humidity of the fresh air is reduced, and in the desorption zone 120, the adsorbent is regenerated.

[0038] A regeneration air duct 200 is installed through the desorption zone 120. A first surface cooler 210 is located upstream of the desorption zone 120, where the humidity and temperature of the regeneration air are reduced. A first fan 220 and a second surface cooler 230 are sequentially installed downstream of the desorption zone 120. The first fan 220 provides the power for the airflow in the regeneration air duct 200. A first valve 240 is installed on the regeneration air duct 200 to control the flow rate; the opening degree of the first valve 240 can adjust the airflow magnitude within the regeneration air duct 200.

[0039] The heat pump system 300 includes an evaporator 310 and a condenser 320 forming a cycle, and also includes a conventional compressor and expansion valve to complete the working cycle. The evaporator 310 is located downstream of the first fan 220 on the regeneration air duct 200, and the condenser 320 is located upstream of the desorption zone 120 on the regeneration air duct 200. The airflow in the regeneration air duct 200 experiences a temperature increase after passing through the condenser 320, and then enters the desorption zone 120, promoting adsorbent regeneration and transforming into humid, hot air. After passing through the evaporator 310, the temperature and humidity of the humid, hot air partially decrease again, and further decrease at the second surface cooler 230. The operation of the heat pump system 300 transfers the heat from the air discharged from the desorption zone 120 to the air before the desorption zone 120, avoiding energy waste.

[0040] The input end of the fresh air duct 400 is connected to the output end of the regenerated air duct 200, receiving air with lower temperature and humidity output from the regenerated air duct 200, thus avoiding waste of the regenerated air's kinetic energy. The air then continues to pass through the adsorption zone 110 and the third surface cooler 420, forming fresh air with both temperature and humidity meeting the standards. The second fan 410 on the fresh air duct 400 provides the total driving power for the airflow.

[0041] The return air duct 500 originates from the target space (such as a workshop) and connects to the fresh air duct 400, located upstream of the adsorption zone 110, where it undergoes another dehumidification and cooling process. A second valve 510 is installed on the return air duct 500 to control the flow rate; adjusting the opening of the second valve 510 allows for adjustment of the return air volume. The total fresh air output from the fresh air duct 400 consists of the airflow input from the return air duct 500 and the airflow input from the regenerated air duct 200. The composition of the fresh air can be adjusted by controlling the first valve 240 and the second valve 510.

[0042] In summary, the humidity and temperature of the regenerated air decrease at the first surface cooler 210, and the airflow temperature increases after passing through the condenser 320, thus regenerating the adsorbent in the desorption zone 120 and transforming it into humid and hot air. After passing through the evaporator 310, the temperature and humidity of the humid and hot air partially decrease again. At the second surface cooler 230, the temperature and humidity further decrease. The heat pump system 300 can transfer the heat from the air extracted from the desorption zone 120 to the air before the desorption zone 120, avoiding energy waste; fresh air... The input end of the duct 400 is connected to the output end of the regenerated air duct 200, receiving air with low temperature and humidity output from the output end of the regenerated air duct 200. The air then passes through the adsorption zone 110 and the third surface cooler 420, forming fresh air with both temperature and humidity meeting the standards, thus avoiding the waste of regenerated air kinetic energy. The total amount of fresh air output by the fresh air duct 400 is the airflow input from the return air duct 500 and the airflow input from the regenerated air duct 200. The composition of the fresh air can be adjusted by controlling the first valve 240 and the second valve 510.

[0043] Reference Figure 2 In one embodiment, a distribution bypass 600 is provided corresponding to the regeneration air duct 200. The distribution bypass 600 is connected from downstream of the first surface cooler 210 of the regeneration air duct 200 to downstream of the second surface cooler 230. A third valve 610 for controlling the flow rate is provided on the distribution bypass 600.

[0044] In this embodiment, the air volume required by the desorption zone 120 during the operation of the rotary adsorption device 100 is not fixed, and the replenished fresh air volume is also not fixed. Therefore, a distribution bypass 600 is set on the regeneration air duct 200. The second fan 410 on the fresh air duct 400 controls the total supply air volume, and the output ends of the regeneration air duct 200 and the return air duct 500 provide all the supply air. On the regeneration air duct 200, the air entering from the regeneration air duct 200 is fresh input air. Part of the fresh input air undergoes regeneration through the desorption zone 120, and the remaining part of the fresh input air goes from the distribution bypass 600 to the fresh air duct 400. Specifically, the distribution bypass 600 is led downstream of the first surface cooler 210 of the regeneration air duct 200. At this time, this part of the fresh input air has been cooled and partially dehumidified by the first surface cooler 210; it is then introduced downstream of the second surface cooler 230, and the dehumidification process is further completed through the adsorption zone 110 of the rotary adsorption device 100.

[0045] In one embodiment, the first valve 240 is linked with the third valve 610.

[0046] In this embodiment, to ensure a constant final output airflow from the regenerated air duct 200, the first valve 240 and the third valve 610 are linked. For example, when the opening of the first valve 240 increases to a certain extent, the opening of the third valve 610 decreases by a corresponding amount. This linkage can be achieved in various ways, such as linking the first valve 240 and the third valve 610 during control, or making them an integral structure. In a specific implementation, at the positions of the first valve 240 and the third valve 610, the regenerated air duct 200 and the air distribution bypass 600 are arranged side-by-side. A valve plate is provided and driven to move between the regenerated air duct 200 and the air distribution bypass 600, thus naturally linking the first valve 240 and the third valve 610. In this case, the first valve 240 and the third valve 610 are an integral structure.

[0047] In one embodiment, the air distribution bypass 600 is connected in parallel to and to the regenerated air duct 200.

[0048] In this embodiment, the air distribution bypass 600 is fixed to the regeneration air duct 200, which reduces the structural complexity of the entire system and simplifies its layout. Considering that parallel operation is not possible in some locations, the specific air distribution bypass 600 needs to avoid the desorption zone 120 and the first fan 220.

[0049] Reference Figure 3In one embodiment, the regeneration and desorption drying system's fresh air series energy-saving system further includes a secondary rotary adsorption device 700, which includes a secondary rotary wheel with a secondary adsorption zone 710 and a secondary desorption zone 720. The secondary adsorption zone 710 is located downstream of the rotary adsorption device 100 on the fresh air duct 400, and the secondary desorption zone 720 is located upstream of the rotary adsorption device 100 and downstream of the condenser 320 on the regeneration air duct 200.

[0050] Considering that in some cases, the rotors need to be connected in series, with multiple rotors sharing different adsorption functions, all rotors need to complete the desorption process. In this embodiment, a secondary rotor adsorption device 700 is also provided corresponding to the rotor adsorption device 100. The secondary adsorption zone 710 is located downstream of the rotor adsorption device 100 on the fresh air duct 400, and works with the adsorption zone 110 on the rotor adsorption device 100 to complete the adsorption function. The secondary desorption zone 720 is located upstream of the rotor adsorption device 100 and downstream of the condenser 320 on the regeneration air duct 200. Thus, the air heated by the condenser 320 passes sequentially through the secondary desorption zone 720 and the desorption zone 120, and the high-temperature air completes the regeneration of the secondary desorption zone 720 and the desorption zone 120.

[0051] Reference Figure 4 In one embodiment, the regeneration and desorption drying system's fresh air series energy-saving system further includes a secondary rotary adsorption device 700, which includes a secondary rotary wheel with a secondary adsorption zone 710 and a secondary desorption zone 720. The secondary adsorption zone 710 is located downstream of the rotary adsorption device 100 on the fresh air duct 400, and the secondary desorption zone 720 is located upstream of the rotary adsorption device 100 on the regeneration air duct 200. The condenser 320 includes a first condenser and a second condenser connected in series, with the first condenser located upstream of the secondary desorption zone 720 and the second condenser located between the secondary desorption zone 720 and the desorption zone 120.

[0052] In this embodiment, to avoid poor regeneration of the adsorbent in the secondary desorption zone 720 and desorption zone 120, the condenser 320 is configured as a first condenser and a second condenser. The airflow in the regeneration air duct 200 is heated after passing through the first and second condensers before entering the secondary desorption zone 720 and desorption zone 120 respectively, performing a highly efficient regeneration process on the secondary desorption zone 720 and desorption zone 120.

[0053] Reference Figure 1 In one embodiment, a perforated first filter 250 is provided at the beginning of the regenerated air duct 200.

[0054] In this embodiment, the first filter 250 is used to filter the incoming air, mainly to filter solid particulate matter. Specifically, the first filter 250 can be a polymer type, and multiple filters can be set to achieve both primary and high-efficiency filtration effects.

[0055] Reference Figure 1 In one embodiment, an adsorption-type second filter 430 is provided at the end of the fresh air duct 400.

[0056] In this embodiment, the dehumidified airflow is processed by the second filter 430, which mainly adsorbs chemical substances. Specifically, the second filter 430 can be of the activated carbon type.

[0057] In one embodiment, the first valve 240 and the second valve 510 are electrically controlled valves.

[0058] In this embodiment, the first valve 240 and the second valve 510 are limited to electrical control, thereby improving the automation level of the entire system.

[0059] In one embodiment, temperature sensors are provided on the regeneration air duct 200 upstream and downstream of the desorption zone 120.

[0060] In this embodiment, temperature sensors are installed upstream and downstream of the desorption zone 120, and the operation of the heat pump system 300 is guided by the relevant sensor data.

[0061] In summary, the regeneration and desorption drying system provided by this utility model, a series-connected fresh air energy-saving system, reduces the humidity and temperature of the regenerated air at the first surface cooler 210. The airflow temperature increases after passing through the condenser 320, then regenerates the adsorbent in the desorption zone 120, thus transforming it into humid and hot air. After passing through the evaporator 310, the temperature and humidity of the humid and hot air partially decrease again. At the second surface cooler 230, the temperature and humidity further decrease. The heat pump system 300 then transfers the heat from the air exhausted in the desorption zone 120 to the air before the desorption zone 120. The fresh air duct 400 is connected to the output of the regenerated air duct 200, receiving air with low temperature and humidity from the output of the regenerated air duct 200. This air then passes through the adsorption zone 110 and the third surface cooler 420, forming fresh air with both temperature and humidity meeting the standards, thus avoiding the waste of kinetic energy from the regenerated air. The total amount of fresh air output by the fresh air duct 400 is the airflow input from the return air duct 500 and the airflow input from the regenerated air duct 200. The composition of the fresh air can be adjusted by controlling the first valve 240 and the second valve 510.

[0062] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A new air series energy saving system of a regeneration and desorption drying system, characterized in that, include: The rotary adsorption device (100) includes a rotary wheel provided with an adsorption zone (110) and a desorption zone (120); A regeneration air duct (200) is provided through the desorption zone (120). The regeneration air duct (200) has a first surface cooler (210) upstream of the desorption zone (120) and a first fan (220) and a second surface cooler (230) sequentially downstream of the desorption zone (120). A first valve (240) for controlling the flow rate is provided on the regeneration air duct (200). A heat pump system (300) includes an evaporator (310) and a condenser (320) forming a cycle, the evaporator (310) being disposed downstream of the first fan (220) on the regeneration air duct (200), and the condenser (320) being disposed upstream of the desorption zone (120) on the regeneration air duct (200); A fresh air duct (400) is connected to the output end of the regenerated air duct (200). The fresh air duct (400) passes through the adsorption zone (110) and a second fan (410) and a third surface cooler (420) are provided downstream. The return air duct (500) is connected to the fresh air duct (400) located upstream of the adsorption zone (110), and a second valve (510) for controlling the flow rate is provided on the return air duct (500).

2. The system according to claim 1, wherein, A distribution bypass (600) is provided corresponding to the regenerated air duct (200). The distribution bypass (600) is connected from the downstream of the first surface cooler (210) of the regenerated air duct (200) to the downstream of the second surface cooler (230). A third valve (610) for controlling the flow rate is provided on the distribution bypass (600).

3. The system according to claim 2, wherein, The first valve (240) is linked with the third valve (610).

4. The system according to claim 2, wherein, The air distribution bypass (600) runs parallel to and is connected to the regenerated air duct (200).

5. The system according to claim 1, wherein, The regeneration and desorption drying system's fresh air series energy-saving system also includes a secondary rotary adsorption device (700), which includes a secondary rotary wheel with a secondary adsorption zone (710) and a secondary desorption zone (720). The secondary adsorption zone (710) is located downstream of the rotary adsorption device (100) on the fresh air duct (400), and the secondary desorption zone (720) is located upstream of the rotary adsorption device (100) and downstream of the condenser (320) on the regeneration air duct (200).

6. The system of claim 1, wherein the system further comprises a heat exchanger. The new air series energy-saving system of the regeneration and desorption drying system further comprises a secondary rotary adsorption device (700), the secondary rotary adsorption device (700) comprises a secondary rotary wheel provided with a secondary adsorption zone (710) and a secondary desorption zone (720), the secondary adsorption zone (710) is arranged on the new air pipeline (400) downstream of the rotary adsorption device (100), the secondary desorption zone (720) is arranged on the regeneration air pipeline (200) upstream of the rotary adsorption device (100), the condenser (320) comprises a first condenser and a second condenser connected in series, the first condenser is arranged upstream of the secondary desorption zone (720), and the second condenser is arranged between the secondary desorption zone (720) and the desorption zone (120).

7. The system according to claim 1, wherein, A first filter (250) in the form of a hole is arranged at the starting end of the regeneration air pipeline (200).

8. The system according to claim 7, wherein, A second filter (430) in the form of adsorption is arranged at the ending end of the new air pipeline (400).

9. The system according to any one of claims 1 to 8, wherein the system is characterized by, The first valve (240) and the second valve (510) are electrically controlled valves.

10. The system according to any one of claims 1 to 8, wherein the system is characterized by, Temperature sensors are arranged on the regeneration air pipeline (200) corresponding to the upstream and downstream of the desorption zone (120).

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