Air pre-treatment system and heat pipe dehumidifier

Abstract

The utility model relates to air compression system technical field, especially a kind of air pretreatment system and heat pipe dehumidifier, air pretreatment system includes heat pipe dehumidifier and cold source supply system, heat pipe dehumidifier unit includes shell, evaporative section, condensing section and cooling coil, evaporative section, condensing section and cooling coil are all arranged in shell, cooling coil is arranged between evaporative section and condensing section;First cold source supply end is connected with cooling coil;Cold source supply system is configured to provide cold source medium to cooling coil;Wherein, shell has import end and export end, import end is located at the end of shell close to evaporative section, export end is located at the end of shell close to condensing section, export end is connected with air compressor.In the utility model technical scheme, it is aimed at carrying out dehumidification treatment to air before compression by air pretreatment system, and air temperature is adjusted to the temperature range suitable for air compressor operation, reduce the energy consumption of air compressor and improve equipment stability.

Description

Technical Field

[0001] This utility model relates to the field of compressed air system technology, and in particular to an air pretreatment system and a heat pipe dehumidifier. Background Technology

[0002] Compressed air, as the second largest power source, has been widely used in various fields. Screw compressors and other oil-lubricated air compressors are key equipment for compressed air. Current energy-saving technologies for them mainly focus on optimizing the unit structure and control strategies, with the aim of improving the energy efficiency of air compressors and reducing system losses.

[0003] Among related technologies, energy-saving strategies for compressed air systems mainly include the application of variable frequency control technology, the integration of waste heat recovery systems, and pipeline optimization to reduce system resistance and leakage. These measures are mainly aimed at improving energy efficiency and reducing energy consumption through equipment structure optimization and control strategy improvement. However, the improvement in equipment energy efficiency is limited, and the improvement in energy efficiency often leads to an increase in the initial investment of equipment. Utility Model Content

[0004] The main purpose of this invention is to provide an air pretreatment system that dehumidifies the air before compression and adjusts the air temperature to a suitable operating range for the air compressor, thereby reducing the energy consumption of the air compressor and improving equipment stability.

[0005] To achieve the above objectives, the air pretreatment system includes: A heat pipe dehumidifier, comprising a housing, an evaporator, a condenser, and a cooling coil, wherein the evaporator, the condenser, and the cooling coil are all disposed within the housing, and the cooling coil is disposed between the evaporator and the condenser; and A cold source supply system, wherein the first cold source supply end is connected to the cooling coil; the cold source supply system is configured to provide a cold source medium to the cooling coil. The housing has an inlet end and an outlet end. The inlet end is located at the end of the housing near the evaporator, and the outlet end is located at the end of the housing near the condenser. The outlet end is connected to the air compressor.

[0006] In one embodiment of the present invention, the cold source supply system includes a cold source supply machine and a cold source supply tank, wherein the cold source supply tank is connected to the cold source supply machine and the cooling coil via pipeline.

[0007] In one embodiment of this utility model, the cold source supply machine is an ice slurry machine.

[0008] In one embodiment of the present invention, the cold source supply system further includes a cold source buffer box, which is connected to the ice slurry machine and the cold source supply tank.

[0009] In one embodiment of the present invention, the cold source supply system further includes a cold source return branch, which includes a first return branch and a second return branch; the first return branch connects the cold source supply tank and the ice slurry machine, and the second return branch connects the cold source supply tank and the cooling coil.

[0010] In one embodiment of the present invention, the air pretreatment system further includes a load heat exchange bypass, the load heat exchange bypass includes a load end and a plate heat exchanger, the plate heat exchanger is connected to the cold source supply tank and the load end; The cold source supply system is also configured to provide a cold source medium to the plate heat exchanger.

[0011] In one embodiment of the present invention, the housing includes a first flow layer and a second flow layer that are connected in communication, the evaporation section is located in the first flow layer, and the condensation section is located in the second flow layer; The first flow layer has the inlet end, and the second flow layer has the outlet end.

[0012] In one embodiment of this utility model, the first flow layer and the second flow layer are arranged vertically, and the evaporation section is positioned opposite the condensation section.

[0013] In one embodiment of the present invention, the heat pipe dehumidifier further includes a bypass valve, which is disposed in the overlapping part between the first flow layer and the second flow layer, and is located on the side of the evaporation section facing the inlet end.

[0014] This utility model also proposes a heat pipe dehumidifier, which includes a shell, an evaporator, a condenser, a cooling coil, and a bypass valve. The evaporator, the condenser, and the cooling coil are all disposed within the shell, with the cooling coil located between the evaporator and the condenser. The shell includes a first flow layer and a second flow layer that are connected to each other. The evaporator is located in the first flow layer, and the condenser is located in the second flow layer. The first and second flow layers are arranged vertically, with the evaporator positioned opposite the condenser. The bypass valve is located in the overlapping portion between the first and second flow layers and is situated on the side of the evaporator facing the inlet end.

[0015] In this utility model's technical solution, the air pretreatment system is used to dehumidify and cool the air before it enters the air compressor, thereby ensuring that the humidity and temperature of the air entering the air compressor are within a suitable range for the air compressor's operation. Specifically, outside air enters the casing from the inlet end of the heat pipe dehumidifier, and then the air undergoes a first cooling in the evaporation section, followed by a second cooling and dehumidification in the cooling coil. The low-temperature dehumidified air is then heated in the condensation section, thereby reducing the initial humidity and temperature of the air entering the air compressor, reducing condensate generation and overheating load during the air compressor's compression process, significantly reducing compression energy consumption, and avoiding the high cost of modifying the air compressor's structure required by traditional energy efficiency improvement technologies, thus achieving a balance between energy saving and initial investment costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of an embodiment of the air pretreatment system provided by this utility model; Figure 2 This is a schematic diagram of the structure of the heat pipe dehumidifier provided by this utility model.

[0018] Explanation of icon numbers: 10. Heat pipe dehumidifier; 1011. First flow layer; 1012. Second flow layer; 10a. Inlet end; 10b. Outlet end; 102. Evaporator; 103. Condenser; 104. Cooling coil; 105. Bypass valve; 20. Cold source supply system; 201. Cold source supply unit; 202. Cold source supply tank; 203. Cold source buffer tank; 204. First return branch; 205. Second return branch; 206. Plate heat exchanger.

[0019] 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

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0023] Existing oil-lubricated air compressors, such as screw compressors, have several significant drawbacks: First, their high energy consumption is a prominent issue. During air compression, these compressors require substantial electrical energy to overcome the resistance between gas molecules and compress the air to the required pressure. This limits the potential for energy efficiency improvements and leads to a significant increase in initial investment. Second, air compressors are highly sensitive to their operating environment. Directly handling high-temperature, high-humidity air can cause overheating and condensation, increasing the cooling burden on the unit, leading to performance degradation or equipment failure, and thus shortening the compressor's lifespan. Furthermore, current energy-saving technologies for air compression systems primarily focus on optimizing the compressor itself, which is not conducive to energy-saving retrofits in existing factories. Traditional refrigeration and dehumidification methods cannot achieve temperature and humidity decoupling (or require a reheat system), resulting in unsatisfactory energy-saving effects. Therefore, to address these shortcomings, this invention proposes an air pretreatment system.

[0024] Please see Figure 1 and Figure 2 The air pretreatment system includes: Heat pipe dehumidifier 10 includes a housing, an evaporator 102, a condenser 103, and a cooling coil 104. The evaporator 102, condenser 103, and cooling coil 104 are all housed within the housing, with the cooling coil 104 positioned between the evaporator 102 and the condenser 103. The cold source supply system 20 has a first cold source supply end connected to the cooling coil 104; the cold source supply system 20 is configured to provide a cold source medium to the cooling coil 104. The casing has an inlet end 10a and an outlet end 10b. The inlet end 10a is located at the end of the casing near the evaporator 102, and the outlet end 10b is located at the end of the casing near the condenser 103. The outlet end 10b is connected to an air compressor.

[0025] Figure 1 This is a schematic diagram of an embodiment of the air pretreatment system provided by the present invention, which includes the devices or equipment involved in the air pretreatment system (including but not limited to heat pipe dehumidifier 10, cold source supply unit 201, pipes and control valves, etc.). Figure 1 The arrows in the diagram only indicate the flow direction of the fluid medium (such as the cold source medium, the return medium at the load end, etc.) in one embodiment. Figure 2 This is a schematic diagram of the structure of the heat pipe dehumidifier 10 provided by this utility model, which can be used to explain some of the technical solutions involved in this utility model.

[0026] In this utility model's technical solution, the air pretreatment system is used to dehumidify and cool the air before it enters the air compressor, thereby ensuring that the humidity and temperature of the air entering the air compressor are within a suitable range for the air compressor's operation. Specifically, outside air enters the casing from the inlet end 10a of the heat pipe dehumidifier 10, and then the air undergoes a first cooling in the evaporator section 102, followed by a second cooling and dehumidification in the cooling coil 104. The low-temperature dehumidified air is then heated in the condenser section 103, thereby reducing the initial humidity and temperature of the air entering the air compressor, reducing the generation of condensate and overheating load during the compression process of the air compressor, significantly reducing compression energy consumption, and avoiding the high cost of modifying the air compressor's structure using traditional energy efficiency improvement technologies, thus achieving a balance between energy saving and initial investment cost optimization.

[0027] Specifically, the cold source medium provided by the cold source supply system 20 can flow to the cooling coil 104 with the cooperation of a pressure pump, control valve, and other structures, so that the outside air, i.e., the pre-treated air, is cooled and dehumidified at the cooling coil 104. The outside air enters from the inlet end 10a of the heat pipe dehumidifier 10, and then undergoes the first cooling at the evaporation section 102. In this section, the refrigerant in the evaporation section 102 absorbs heat due to evaporation, thereby lowering the air temperature. At the same time, water vapor in the air condenses into water droplets, thus achieving the effect of initial cooling and dehumidification. Subsequently, the gas undergoes a second cooling and dehumidification at the cooling coil 104 through the absorption of heat by the cold source medium, thereby ensuring that the air entering the screw compressor or other oil-lubricated air compressor is in a low humidity state. The air that has undergone secondary cooling and dehumidification is heated in the condenser section 103 of the heat pipe dehumidifier 10. Specifically, the refrigerant in the condenser section 103 changes from a gaseous state to a liquid state, releasing a large amount of heat. This heat can be used to heat the already cooled and dehumidified air. In this way, the air temperature is increased and the humidity is reduced before entering the air compressor, reaching the optimal temperature and humidity conditions suitable for the operation of the air compressor. The cooled and dehumidified air then enters an oil-lubricated air compressor such as a screw compressor through the outlet end 10b, thereby reducing the operating energy consumption of the oil-lubricated air compressor such as a screw compressor. At the same time, the use of the cold source supply system 20 to provide cooling medium for the heat pipe dehumidifier 10 can improve the cooling and dehumidification capability of the air pretreatment system. It is understood that the air pretreatment system may consist of at least one heat pipe dehumidifier 10 and at least one cold source supply system 20. For example, in one embodiment, the air pretreatment system includes one heat pipe dehumidifier 10 and one cold source supply system 20, with the cooling coil 104 of the heat pipe dehumidifier 10 connected in series with the cold source supply system 20; in another embodiment, the air pretreatment system includes multiple heat pipe dehumidifiers 10 and one cold source supply system 20, with each heat pipe dehumidifier 10 independently equipped with a cold source supply system 20 having a cold source medium conveying pipe adapted to the number of heat pipe dehumidifiers 10, and each cold source medium conveying pipe connected in series with a cooling coil 104; or, the air pretreatment system includes multiple heat pipe dehumidifiers 10 and multiple cold source supply systems 20, with the multiple heat pipe dehumidifiers 10 and the multiple cold source supply systems 20 being independently equipped, and each cold source medium conveying pipe connected in series with a cooling coil 104.

[0028] In one embodiment of this utility model, the cold source supply system 20 includes a cold source supply unit 201 and a cold source supply tank 202. The cold source supply tank 202 is connected to the cold source supply unit 201 and the cooling coil 104 via pipelines. The cold source supply unit 201 is responsible for generating and maintaining the circulation of the cold source medium, providing the cold source medium to the heat pipe dehumidifier 10 and the cooling coil 104. The cold source supply tank 202 can hold the cold source medium and is connected to the cold source supply unit 201 and the cooling coil 104 via pipelines to ensure that the cold source medium can circulate continuously, thereby maintaining the cooling effect of the heat pipe dehumidifier 10.

[0029] In one embodiment of this utility model, the cold source supply unit 201 is an ice slurry machine, so that the cold source medium is in the state of an ice-water mixture. It is understood that ice melting into water absorbs a large amount of heat (1 kg of water undergoing a 1°C temperature change absorbs or releases 4.2 kJ of heat to the outside, which is sensible heat, representing sensible heat energy storage; while 1 kg of 0°C water undergoing a phase change and condensing into 0°C ice requires absorbing 333.55 kJ of heat, representing latent heat energy storage). Using ice slurry for cold storage can reduce the amount of medium used and the size of the equipment. Furthermore, using low-temperature chilled water helps reduce the operating energy consumption of the dehumidifier and the initial investment in coil selection. In one embodiment, the air temperature is t0. =35.5℃, moisture content is 21.5g / kg, enthalpy is 82.38kJ / kg, relative humidity is 52%; experimental data and theoretical analysis show that the efficient intake temperature of the air compressor should be maintained at 18~30℃. After dehumidifying, the air is reheated to temperature t3=20℃, then the temperature after pre-cooling treatment is t1=18.5℃, at which point condensation has already occurred, relative humidity is 95%, and enthalpy is 50.75kJ / kg; after dehumidification treatment by the cooling coil, the air becomes saturated air at t2=3℃, moisture content is 5.45g / kg, and enthalpy is 14.18kJ / kg; the temperature of the reheated air is t3=20℃.

[0030] A factory project uses air compressors with a single unit power of 1500kW and a single unit air volume of 15000m³ / h. Considering a 5% energy loss, the cooling capacity required for dehumidification per hour is: 15000 1.205 (50.75-14.18) / 0.95=695792.67kJ; Low-temperature water dehumidification is used. Assuming that after processing by a variable evaporation temperature chiller, all the cooling capacity for dehumidification is provided by an ice slurry chiller, with a coefficient of performance (COP) of 4.5, the corresponding power consumption per hour for dehumidification is as follows: 695792.67 / 4.5 / 3600=42.95kWh; Based on theoretical analysis and experimental results, when the air humidity remains constant, for every 3°C increase in inlet temperature, the air compressor's energy consumption increases by approximately 1%; when the inlet temperature remains constant, for every 10% increase in relative humidity, the air compressor's average energy consumption increases by 0.56%. After dehumidification, the air's moisture content is 5.45 g / kg, corresponding to a relative humidity of 14.63% at 35.5°C. The hourly power saving after air pretreatment is approximately: 1500 [(35.5-20) / 3] 0.01 + (52 - 14.63) / 10 0.0056] = 108.89 kWh; Taking Chongqing as an example, its hot and humid climate lasts for about six months. Assuming the equipment operates for 8 hours per day, and referring to Chongqing's peak-valley electricity pricing policy (a reduction of 0.18 yuan / kWh from the flat-rate price), and using the industrial and commercial electricity price of 1.18 yuan / kWh, the annual electricity cost savings for a single unit of equipment would be approximately: 180 8 (1.18) 108.89-1 42.95) = 123177.89 yuan.

[0031] In some large factories, the demand for compressed air is enormous, requiring multiple high-power air compressors. If this energy-saving technology can be effectively utilized, the energy-saving effect will be significant.

[0032] In one embodiment, the cold source supply system 20 further includes a cold source buffer tank 203, which is connected to the ice slurry machine and the cold source supply tank 202. That is, the ice-water mixture from the ice slurry machine passes sequentially through the cold source buffer tank 203 and the cold source supply tank 202 to the cooling coil 104. When the cooling demand is low, the ice-water mixture can be stored in the buffer tank, while when the cooling demand is high, the buffer tank can provide additional cooling capacity, thereby ensuring the stable operation of the system. The cold source supply system 20 can operate during off-peak electricity prices, and the generated cooling medium can be stored in the cold source buffer tank 203. During peak electricity prices, the cooling medium in the cold source buffer tank 203 is used to further reduce cooling costs by taking advantage of the peak-valley electricity price difference.

[0033] In one embodiment of this utility model, the cold source supply system 20 further includes a cold source return branch, which includes a first return branch 204 and a second return branch 205. The first return branch 204 connects the cold source supply tank 202 and the ice slurry machine, and the second return branch 205 connects the cold source supply tank 202 and the cooling coil 104. Thus, the cold source medium that has heated up in the cooling coil 104 can return to the ice slurry machine for refrigeration. During the return process, the buffering effect of the cold source supply tank 202 can prevent the returned cold source medium from exceeding the available capacity of the ice slurry machine. The solution is that one-way valves and pressure pumps can be installed on the first return branch 204 and the second return branch 205 to make the return cold source medium flow unidirectionally towards the cold source supply tank 202 and the ice slurry machine. At the same time, the inner cavity of the cold source supply tank 202 can be isolated so that the internal space of the cold source supply tank 202 forms at least two different functional areas. One functional area can be used for the flow of cold source medium from the ice slurry machine, and the other functional area can be used for the flow of cold source medium returning from the cooling coil 104, thereby avoiding heat exchange between cold source media of different temperatures.

[0034] Furthermore, the air pretreatment system also includes a plate heat exchanger 206, which is connected to the cold source supply tank 202 and the load end; The cold source supply system 20 is also configured to provide cold source medium to the plate heat exchanger 206. In one embodiment, the plate heat exchanger 206 is connected to the load end (i.e., production room load, user load, etc.) and the cold source supply tank 202 through a pipe. In this way, the air pretreatment system can not only pretreat the air, but also provide cooling services for other loads. At the same time, the plate heat exchanger 206 is connected to the load end and the second return branch 205 through another pipe. In this way, the cold source medium that has completed heat exchange at the load end flows back to the cold source supply tank 202 and finally returns to the ice maker for cooling again, ensuring the efficient circulation and utilization of the cold source medium in the air pretreatment system.

[0035] In one embodiment of the present invention, the housing includes a first flow layer 1011 and a second flow layer 1012 that are connected in a manner, the evaporation section 102 is located in the first flow layer 1011, and the condensation section 103 is located in the second flow layer 1012. The first flow layer 1011 has an inlet end 10a, and the second flow layer 1012 has an outlet end 10b. Thus, different flow layers can achieve different air treatment functions, thereby improving treatment efficiency and quality.

[0036] Furthermore, the first flow layer 1011 and the second flow layer 1012 are arranged vertically, and the evaporation section 102 is positioned opposite the condensation section 103. Specifically, the first flow layer 1011 is located below the second flow layer 1012. Since the evaporation section 102 is below and the condensation section 103 is above, the hot and cold areas are naturally separated, reducing energy loss during heat exchange. At the same time, in the evaporation section 102 and the cooling coil 104, moisture in the air will condense due to cooling. Since it is located below, the condensate can drip down and be discharged naturally, which facilitates humidity control.

[0037] In one embodiment of this utility model, the heat pipe dehumidifier 10 further includes a bypass valve 105. The bypass valve 105 is disposed in the overlapping part between the first flow layer 1011 and the second flow layer 1012, and is located on the side of the evaporator 102 facing the inlet end 10a. Thus, when the outside air is in a natural state within the operating range of the air compressor, the outside air can directly enter the air compressor through the bypass valve 105 without pre-treatment through the evaporator 102, cooling coil 104 and condenser 103, thereby reducing the power consumption of the air pre-treatment system.

[0038] This utility model also proposes a heat pipe dehumidifier 10, which includes a shell, an evaporator 102, a condenser 103, a cooling coil 104, and a bypass valve 105. The evaporator 102, the condenser 103, and the cooling coil 104 are all disposed inside the shell, with the cooling coil 104 located between the evaporator 102 and the condenser 103. The shell includes a first flow layer 1011 and a second flow layer 1012 that are connected in a continuous manner. The evaporator 102 is located in the first flow layer 1011, and the condenser 103 is located in the second flow layer 1012. The first flow layer 1011 and the second flow layer 1012 are arranged vertically, and the evaporation section 102 is positioned opposite the condensation section 103. The bypass valve 105 is located at the overlapping part between the first flow layer 1011 and the second flow layer 1012, and is located on the side of the evaporation section 102 facing the inlet end 10a. The specific structure of the heat pipe dehumidifier 10 is as described in the above embodiments. Since the heat pipe dehumidifier 10 proposed by this utility model adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0039] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. An air pretreatment system, connected to an air compressor, characterized in that, The air pretreatment system includes: A heat pipe dehumidifier (10) includes a housing, an evaporator (102), a condenser (103), and a cooling coil (104). The evaporator (102), the condenser (103), and the cooling coil (104) are all located within the housing, and the cooling coil (104) is located between the evaporator (102) and the condenser (103). A cold source supply system (20) is connected to the cooling coil (104); the cold source supply system (20) is configured to provide a cold source medium to the cooling coil (104); The housing has an inlet end (10a) and an outlet end (10b). The inlet end (10a) is located at the end of the housing near the evaporator (102), and the outlet end (10b) is located at the end of the housing near the condenser (103). The outlet end (10b) is configured to connect to the air compressor.

2. The air pretreatment system as described in claim 1, characterized in that, The cold source supply system (20) includes a cold source supply machine (201) and a cold source supply tank (202), and the cold source supply tank (202) is connected to the cold source supply machine (201) and the cooling coil (104) by pipeline.

3. The air pretreatment system as described in claim 2, characterized in that, The cold source supply unit (201) is an ice slurry machine.

4. The air pretreatment system as described in claim 3, characterized in that, The cold source supply system (20) also includes a cold source buffer box (203), which is connected to the ice slurry machine and the cold source supply tank (202).

5. The air pretreatment system as described in claim 3, characterized in that, The cold source supply system (20) further includes a cold source return branch, which includes a first return branch (204) and a second return branch (205); the first return branch (204) connects the cold source supply tank (202) and the ice slurry machine, and the second return branch (205) connects the cold source supply tank (202) and the cooling coil (104).

6. The air pretreatment system as described in any one of claims 2 to 5, characterized in that, The air pretreatment system also includes a plate heat exchanger (206), which is connected to the cold source supply tank (202) and the load end; The cold source supply system (20) is also configured to provide a cold source medium to the plate heat exchanger (206).

7. The air pretreatment system as described in claim 1, characterized in that, The housing includes a first flow layer (1011) and a second flow layer (1012) that are connected in a continuous manner. The evaporation section (102) is located in the first flow layer (1011), and the condensation section (103) is located in the second flow layer (1012). The first flow layer (1011) has the inlet end (10a), and the second flow layer (1012) has the outlet end (10b).

8. The air pretreatment system as described in claim 7, characterized in that, The first flow layer (1011) and the second flow layer (1012) are arranged vertically, and the evaporation section (102) is positioned opposite the condensation section (103).

9. The air pretreatment system as described in claim 8, characterized in that, The heat pipe dehumidifier (10) also includes a bypass valve (105), which is located at the overlap between the first flow layer (1011) and the second flow layer (1012) and is located on the side of the evaporation section (102) facing the inlet end (10a).

10. A heat pipe dehumidifier, characterized in that, The heat pipe dehumidifier (10) includes a housing, an evaporator (102), a condenser (103), a cooling coil (104), and a bypass valve (105). The evaporator (102), the condenser (103), and the cooling coil (104) are all located inside the housing, and the cooling coil (104) is located between the evaporator (102) and the condenser (103). The housing includes a first flow layer (1011) and a second flow layer (1012) that are connected in communication. The first flow layer (1011) has an inlet end (10a), and the second flow layer... (1012) has an outlet end (10b), the evaporation section (102) is located in the first flow layer (1011), the condensation section (103) is located in the second flow layer (1012), the first flow layer (1011) and the second flow layer (1012) are arranged vertically, and the evaporation section (102) is positioned opposite the condensation section (103); the bypass valve (105) is located in the overlapping part between the first flow layer (1011) and the second flow layer (1012), and is located on the side of the evaporation section (102) facing the inlet end (10a).

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