Air treatment unit for deep air purification and dehumidification and compressed air preparation process based on air treatment unit

Abstract

The invention relates to the technical field of compressed air preparation, in particular to an air treatment unit for deep air purification and dehumidification and a compressed air preparation process based on the air treatment unit. The rotary wheel adopts the direct expansion type drying device or / and the steam heat exchanger, the dryer is regenerated in combination with electric heating hot air, and the regeneration energy consumption is remarkably reduced compared with the traditional compressed air preparation with the same quality requirement. In addition, the technological process is short, the number of technological equipment is small, the energy consumption loss of an intermediate link is reduced, and the overall energy efficiency of the system is improved. A drying agent needs to be arranged in a traditional adsorption dryer, and the drying agent can be consumed in the regeneration process and needs to be replaced regularly. A rotary wheel drying mode is adopted, a drying agent does not need to be used inside, the maintenance cost and the replacement frequency are reduced, and the operation efficiency of the system is improved. In addition, the air treatment unit can detect the quality of output air, unqualified air is subjected to backflow treatment, and it is guaranteed that the output air is stably in a high-quality state.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air preparation, and in particular to an air processing unit for deep air purification and dehumidification and a compressed air preparation process based thereon. Background Art

[0002] In the production process of food and medicine, high-quality compressed air is often used for material drying, seed fermentation, and material transportation. Whether the dust particles and moisture in the atmosphere can be removed to meet the process use, or even to avoid undesirable problems after contact with the product in subsequent production, is very critical. The traditional compressed air preparation process will mostly use a freeze dryer plus an adsorption dryer plus a high-precision filter to deeply dehumidify and filter the compressed air produced by the air compressor, so as to achieve the air dust particle size limit, moisture content and oil content required by the production process and GMP. The dryer of the above system adopts a heatless or micro-heat regeneration design, in which drainage and regeneration will consume more than 10% of the compressed air. In some cases, the compressed air consumption can reach 20% or even higher depending on the flow rate and weather temperature and humidity conditions. This part of the consumption is usually obtained by consuming the compressed air that has been produced by the compressor, which will lead to a large loss of energy. And the larger the installed capacity of the factory gas, the higher the loss of this part of energy.

[0003] In addition, in the early stage of startup, the traditional dehumidification device may produce a certain amount of unqualified air because the equipment has not entered the normal working state and the working conditions in the drying and dehumidification components have not met the expectations. If it directly enters the subsequent process, it will affect the service life of the subsequent equipment and the quality of the user's products. Summary of the invention

[0004] The object of the present invention is to provide an air treatment unit for deep air purification and dehumidification and a compressed air preparation process based thereon, which can effectively save energy consumption by effectively saving the consumption of compressed air for regenerating the rotor.

[0005] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0006] An air handling unit for deep purification and dehumidification, comprising:

[0007] an inlet for introducing outside air;

[0008] The pre-treatment section is used to filter the outside air and dehumidify the refrigerated part;

[0009] The rotor section is used to dry, dehumidify and regenerate the air after dehumidification in the refrigeration part;

[0010] The output section is used to output the processed clean air;

[0011] The rotor section includes: a rotor and a rotor regeneration component; the rotor adopts a direct expansion evaporator or / and an electric / steam heat exchanger drying device; the rotor adopts a single rotor structure, including a processing surface and a regeneration surface, the processing surface is used to deeply dehumidify the air after freezing and pre-dehumidification in the pre-treatment section to form a treated air and transport it to the output section, and the rotor regeneration component extracts part of the treated air and heats it with the fresh air and then sends it to the regeneration surface to regenerate the rotor;

[0012] The output section is provided with a temperature and humidity measuring component and a control valve. The temperature and humidity measuring component is used to detect the air treatment quality of the treated wind. The control valve controls the output section output, partial reflux or full reflux to the pretreatment section according to the detection data of the temperature and humidity measuring component.

[0013] As an improvement, the pretreatment section includes a filter device and a precooler connected in sequence through a pipeline;

[0014] A processing fan is provided at the rear of the pre-treatment section for conveying the air from the pre-treatment section to the rotor section, overcoming the rotor resistance, and providing a slight positive pressure to supply the downstream air compressor to meet the competition formed by different demands.

[0015] As an improvement, an evaporator is further provided between the filtering device and the precooler.

[0016] As an improvement, the filtering device and the precooler are both arranged in two stages.

[0017] As an improvement, the rotor regeneration component comprises a regeneration air inlet, a second filter component and a heater connected in sequence through a pipeline, the regeneration air inlet is used to introduce fresh air, and the fresh air is filtered once through the second filter component; at the same time, the rotor regeneration component extracts part of the treated air and combines it with the fresh air, which is heated by the heater and then sent to the regeneration surface to regenerate the rotor;

[0018] The rotor regeneration assembly also includes a regeneration air blower and a control unit, wherein the control unit is used to extract part of the treated air and transport the treated air to the pipeline to be combined with the fresh air;

[0019] The regenerated hot air passing through the wheel is discharged through the regeneration air fan.

[0020] As an improvement, in the rotary wheel regeneration component, a condenser is provided between the second filter component and the heater.

[0021] As an improvement, the proportion of the processed air extracted by the rotary wheel regeneration component is 10-20%, and the flow ratio of the processed air extracted by the rotary wheel regeneration component to the regeneration air is 1:1.

[0022] The present invention also discloses an energy-saving preparation process for high-quality compressed air with deep air purification and dehumidification, which uses the above-mentioned air processing unit to process air; after the air is compressed by an air compressor, it is transported to a buffer tank for storage through a precision filter, and then transported to the user end.

[0023] As an improvement, the precision filter in the preparation process is a dust and oil removal precision filter.

[0024] The advantages of the present invention are:

[0025] 1. In the traditional process, the regeneration process of the adsorption dryer consumes a large amount of compressed air, which usually accounts for 10% or even more of the finished compressed air processed by the system, resulting in a large loss of energy. The runner of the present invention uses a direct expansion drying device and / or a steam heat exchanger, combined with electric heating hot air to regenerate the dryer, and the regeneration energy consumption is significantly reduced compared to the traditional compressed air preparation with the same quality requirements. In addition, the process flow of the present invention is short, the process equipment is small, the energy loss in the intermediate links is reduced, and the overall energy efficiency of the system is improved.

[0026] 2. The present invention is provided with a temperature and humidity measuring component and a control valve in the output section, which can monitor the air quality of the output section in real time and perform corresponding operations according to the air quality. When the temperature and humidity measuring component detects that the air quality of the output section is unqualified, part or all of the air can be refluxed and processed twice or more times, thereby ensuring that the quality of the output air is always in a qualified state. The air processing unit of the present invention can ensure that the entire system can quickly obtain qualified air after startup, avoid unqualified air from entering the rear-end air compressor and precision filter, and affect the service life of subsequent devices, and can also effectively ensure the stability of the air quality.

[0027] 3. Traditional adsorption drying devices require desiccant, which will be lost during the regeneration process and needs to be replaced regularly. The present invention adopts a rotary drying method, which does not require the use of desiccant inside, reduces maintenance costs and replacement frequency, and improves the operating efficiency of the system.

[0028] 4. The air handling unit of the present invention can adapt to different external air conditions, such as high temperature and high humidity, low temperature and low humidity, etc., to ensure stable operation under various working conditions and provide high-quality compressed air.

[0029] 5. On the basis of meeting the high-quality compressed air supply, the present invention saves electric energy compared with the traditional process, is more conducive to the stability of the analysis and detection system, reduces the operating cost, and greatly improves the visual operation and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The present invention is a process flow chart for preparing compressed air according to the prior art.

[0031] Figure 2 This is a process flow chart for preparing compressed air in Example 1.

[0032] Figure 3 This is a structural diagram of the air handling unit in Example 1.

[0033] Figure 4 This is a structural diagram of the pretreatment section in Example 1.

[0034] Figure 5 This is a structural diagram of the runner section in Example 1.

[0035] Figure 6 This is a structural diagram of the air treatment system in Example 1.

[0036] Figure 7 This is a structural diagram of the output section in the air treatment system in Example 1.

[0037] Figure 8 This is a comparison chart of energy consumption between Example 1 and the prior art at 22.5°C.

[0038] Fig. 9 It is a comparison chart of energy consumption between Example 1 and the prior art at 33°C.

[0039] Indicated in the figure:

[0040] 1-inlet; 2-pretreatment section; 21-filtering device; 211-first filter; 212-second filter; 22-evaporator; 23-precooler; 3-rotor section; 31-rotor; 311-treatment surface; 312-regeneration surface; 32-rotor regeneration assembly; 321-regeneration air inlet; 322-second filter assembly; 323-condenser; 324-heater; 325-regeneration air fan; 4-output section; 41-temperature and humidity measurement assembly; 42-control valve; 5-treatment fan; 6-air handling unit; 7-air compressor; 8-precision filter; 9-buffer tank. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Compressed air is not only used to drive pneumatic equipment, but also used in some special processes, such as yeast seed fermentation, dense phase pneumatic conveying, etc. Some applications, such as yeast seed fermentation, have very high restrictions on the dust particles, moisture, oil content, etc. in the compressed air. Traditional compressed air is generally used in Figure 1 Prepared according to the process shown.

[0043] It mainly includes: air compressor, buffer tank, freeze dryer, precision filter, adsorption dryer, precision filter and buffer tank.

[0044] This system cannot meet the requirements of low pressure dew point by refrigeration dehumidification alone. It is usually used in combination with an adsorption drying tower to meet the requirements of high pressure and low pressure dew point. The compressed air after the above treatment can meet the requirements of the specific process for the compressed air water content, oil content and dust particle content, avoiding the impact of unqualified compressed air on product quality.

[0045] In the above system, because the adsorption dryer needs to alternate between the two exchange columns, the dryer can continuously absorb moisture from the compressed air to achieve the requirement of deep dehumidification. During the continuous moisture absorption process, the adsorption dryer needs to be dried by the power source to ensure its own moisture absorption effect, which is referred to as "regeneration". The above "regeneration" process usually consumes part of the compressed air that has been processed by the system. The consumption of compressed air accounts for about 10% of the finished compressed air processed by the system, or even higher, which will generate a lot of energy flow fees.

[0046] In view of the above problems, the present invention improves the existing process.

[0047] Example 1

[0048] This embodiment discloses an energy-saving preparation process for high-quality compressed air for deep air purification and dehumidification.

[0049] like Figure 2 As shown, the compression process treatment system of this embodiment includes: an air handling unit, an air compressor, a precision filter and a buffer tank.

[0050] In this embodiment, the air is firstly processed by the air processing unit; the air is compressed by the air compressor, and then the air is filtered through a precision filter for dust removal and oil removal, and then the air is transported to the buffer tank for storage, and then transported to the user end. The following is an introduction to each component of this embodiment.

[0051] The structure of the air handling unit in this embodiment includes:

[0052] Inlet 1, for introducing external air;

[0053] Pre-treatment section 2, used for filtering and condensing external air;

[0054] The rotor section 3 is used to dry and dehumidify the condensed air;

[0055] The output section 4 is used to output the processed clean air.

[0056] like Figure 3 As shown, the pre-treatment section 2 includes a filter device 21, an evaporator 22 (the evaporator 22 can be selected according to the process and energy saving requirements) and a pre-cooler 23 which are sequentially connected by pipelines. A processing fan 5 is provided at the rear of the pre-treatment section 2 for conveying the wind of the pre-treatment section 2 to the rotor section 3.

[0057] like Figure 4 As shown, the filtering device 21 in the pretreatment section 2 includes a first filter 211 and a second filter 212. The first filter 211 uses a G4 filter, and the filtering efficiency is more than 90% for particles with a particle size of ≥10μm. In the particle size range of 5-10 microns, the filtering efficiency is 90%. The second filter 212 uses an F9 filter, and the filtering efficiency of the F9 filter is usually more than 95%, which can effectively intercept tiny dust in the air, and the initial filtering efficiency of 0.4 micron particles is greater than or equal to 70%, and the average filtering efficiency is greater than or equal to 95%.

[0058] There are two precoolers 23, which are arranged in series, and can perform gradient freeze-drying on the input air.

[0059] like Figure 5As shown, the rotor section 3 includes: a rotor 31 and a rotor regeneration component 32. The rotor 31 adopts a direct expansion evaporator (optional) or / and a steam heat exchanger drying device, and its material is composed of a hygroscopic material and a base material auxiliary material. The hygroscopic material is high-efficiency silica gel, accounting for 70-85%, and the base material auxiliary material is glass fiber, accounting for 15-30%. The rotor 31 adopts a single rotor structure, including a treatment surface 311 and a regeneration surface 312. The angle of the treatment surface 311 of the rotor is 270°, and the angle of the regeneration surface 312 is 60-70°. The treatment surface 311 is used to deeply dehumidify the air after freezing and pre-dehumidification in the pretreatment section 2 to form a treatment air 33 and transport it to the output section 4. The rotor regeneration component 32 extracts part of the treatment air 33 and heats it with the fresh air and then sends it to the regeneration surface 312 to regenerate the rotor 31. The design of the rotary regeneration component 32 extracting part of the treated air 33 from the working surface has the following two advantages: 1. The extracted treated air 33 has a certain temperature and a low water content, and when it converges with the fresh air to regenerate the regeneration surface 312, few processing steps are required, which can effectively save regeneration energy consumption, and thus save the overall energy consumption of the air treatment unit; 2. The design of extracting the treated air 33 can effectively prevent the gaps at the regeneration surface 312 from leaking to the treatment surface 311, interfering with the air quality of the treatment surface 311, thereby effectively ensuring the stability of the air quality generated by the treatment surface 311 of the rotary wheel 31.

[0060] The rotor regeneration component 32 includes a regeneration air inlet 321, a second filter component 322, a condenser 323 (the condenser 323 can be selected according to process requirements) and an electric / steam heater 324 which are sequentially connected through pipelines. The second filter component 322 uses a G4+F9 integrated filter. Fresh air enters the regeneration air inlet 321 and passes through the second filter component 322, which can effectively filter out the large and small particles mixed inside. Then it enters the condenser 323 for condensation and dehumidification.

[0061] The rotor regeneration component 32 extracts part of the treated air 33 and converges it with the fresh air passing through the condenser 323, and then inputs it into the heater 324 for heating to form regenerated hot air. The regenerated hot air is 135°C dry hot air, which can effectively remove the moisture in the rotor 31 after being input into the regeneration surface 312 of the rotor 31, and dry regenerate the rotor 31, so as to avoid long-term storage of moisture in the rotor 31 affecting the dehumidification and drying effect of the rotor 31.

[0062] The rotor regeneration assembly 32 further includes a regeneration air blower 325 and a control unit. The regeneration air blower 325 is disposed at the rear end of the rotor 31, and the regeneration hot air passing through the rotor 31 is output and discharged under the action of the regeneration air blower 325.

[0063] like Figure 7As shown, the output section 4 is provided with a temperature and humidity measuring component 41 and a control valve 42. The temperature and humidity measuring component 41 is used to detect the air treatment quality of the treated air 33. The control valve 42 controls the output section 4 to output the treated air 33, partially return it to the rotor section, or return it all to the rotor section 3 or the pre-treatment section 2 according to the detection data of the temperature and humidity measuring component 41. When the temperature and humidity measuring component 41 monitors that the air quality of the output section 4 is qualified, it can be directly output.

[0064] When the air compressor needs to be started, when the temperature and humidity measuring component 41 detects that the air quality in the output section is unqualified, the control valve 42 works and refluxes part or all of the air for secondary or more processing, thereby ensuring that the quality of the output air is always in a qualified state.

[0065] Table 1 Parameters of air flow at various locations in the air handling unit

[0066] Location Temperature(℃) Relative humidity (%) Water content (g / kg) Dew point(℃) <![CDATA[Air flow rate (m 3 / h)]]> A 33 69.5 22.1 26.7 2100 B 11.8 98 8.4 11.5 2100 C 4 100 5.0 4.0 2100 D 23 2.3 0.389 -25 1800 E 41 10.4 5.0 4.0 300 J 33 70 25.0 28.7 300 K 33 33.8 14.0 19.1 300 L 60 17.15 22.1 26.21 300 L’ 38 0.7 14.0 19.1 600 M 135 0.7 14.0 19.1 600

[0067] Note: The position of AM in Table 1 is Figure 3 The marked positions correspond.

[0068] The following combination Figure 3 The working process of the air handling unit is explained with Table 1:

[0069] The air enters the air handling unit through inlet 1. The air temperature at the inlet is 33°C, relative humidity is 69.5%, dew point is 26.7°C, and air flow rate is 2100m 3 / H; the air is filtered through a two-stage filter device 21 to effectively remove the internal particulate matter; and then it is transported to the precooler 23 through the evaporator 22 for cooling and dehumidification.

[0070] The precooler 23 adopts a two-stage setting. After the first-stage precooler, the parameters of the airflow are shown as point B, the temperature drops to 11.8°C, the dew point drops to 11.5°C, the relative humidity increases to 98%, and the water content in the air drops to 8.4g / kg; after the second-stage precooler, the parameters of the airflow are shown as point C, the temperature drops to 4°C, the dew point drops to 4°C, the relative humidity increases to 100%, and the water content in the air drops to 5.0g / kg. At this time, the airflow still has a high water content. Therefore, further drying is required.

[0071] The airflow after the pre-treatment section 2 is divided into two parts, one part is the treatment air 33 (flow rate is 1800m 3 / H) as a product is further dehumidified and dried by the rotor 31 and then sent to the output section 4 for output. The rotor 31 adopts a direct expansion drying device (optional). The dew point of the treated air 33 before entering the rotor 31 is 4°C; after entering the rotor 31, the dew point drops sharply to -24°C, so the water in the treated air 33 condenses sharply. As shown at point D, after the output treated air 33 is dried, the water content can be reduced to 0.389g / kg, or even lower.

[0072] The rotor regeneration component 32 extracts part of the treated air 33 (flow rate is 300m 3 / H), for regeneration of the rotor 31. As shown at point E, the temperature of the extracted treated air 33 is 41°C, and it converges with the fresh air before the heater 324.

[0073] The source of the regeneration wind in the rotor regeneration component 32 is the external fresh air. As shown at point J, the air temperature of the fresh air is 33°C, the relative humidity is 70%, and the dew point is 28.7°C, which is similar to point A. The flow rate at point J is 300m 3 / H. After being processed by the second filter assembly 322 and the condenser 323, the fresh air is combined with the extracted part of the processed air 33. The air temperature after the combination is 38°C, the water content is 14.0g / kg, and the total flow rate is 600m 3 / H. After passing through the heater and being heated to 135°C, the hot regeneration air is formed to dry and regenerate the regeneration surface 312 of the rotor 31.

[0074] After the regenerated hot air passes through the rotor 31 , the temperature is reduced to 40-60° C. and then discharged through the regeneration air blower 325 .

[0075] Table 2 Comparison of regeneration energy consumption between traditional process and the present invention

[0076]

[0077] Table 3 Comparison of ice water energy consumption between traditional process and the present invention

[0078]

[0079] Since the traditional process uses freeze drying and adsorption drying, as shown in Table 2 and Table 3, compressed air is required to regenerate the adsorption dryer during the adsorption drying process, resulting in high compressed air consumption. According to statistics, this compressed air consumption can account for 10-22% of the compressed air production, seriously increasing production costs. In addition, the freeze drying process will generate condensed water discharge energy consumption, which will also cause high energy consumption losses.

[0080] Figure 6The system flow chart of the process of the present invention includes an air handling unit 6, an air compressor 7, a precision filter 8 and a buffer tank 9. The precision filter 8 uses a dust removal filter and an oil removal filter supplied by Atlas, and the two filters are arranged in series.

[0081] In this embodiment, the number of air compressors 7 and precision filters 8 is two groups, and the two groups of air compressors 7 and precision filters 8 are arranged in parallel.

[0082] As shown in FIG. 7 , since the air handling unit 6 is provided with a temperature and humidity measuring component 41 and a control valve 42 at the output section 4, when the temperature and humidity measuring component 41 detects that the air quality of the output section 4 is qualified, the output section 4 can be directly output to the subsequent air compressor 7, and then delivered to the buffer tank 9 after passing through the precision filter 8.

[0083] If a special situation occurs, such as when the system is just started, the various components in the pretreatment section 2 and the rotor section 3 do not reach the specified working parameters, and the treated air 33 generated by the rotor 31 does not meet the preset requirements. At this time, the temperature and humidity measurement component 41 detects that the air quality of the output section 4 is unqualified, the control valve 42 works, and partially or completely refluxes the treated air 33 to the precooler 23 of the pretreatment section 2, and then enters the rotor section 31 for internal circulation, thereby achieving the effect of circulating treatment. Finally, after the various components in the air handling unit 6 reach the specified working conditions, after generating the treated air 33 whose indicators meet the preset conditions, it is transported to the subsequent air compressor 7 and precision filter 8 through the output section 4.

[0084] The air processing unit of the present invention can ensure that the entire system can quickly obtain qualified air after startup, prevent unqualified air from entering the rear-end air compressor and precision filter and affecting the service life of subsequent devices, and can also effectively ensure the stability of the air quality.

[0085] Since the system of the present invention is provided with an air processing unit 6, air dust removal and dehumidification can be performed in advance, which can effectively reduce the consumption of compressed air and desiccant in traditional processes. Therefore, compared with the traditional air processing system, the present invention can save about 10-20% of energy consumption, which can effectively reduce production costs and production energy consumption. The following is a comparison of energy consumption between the system in Example 1 and two control examples under different loads and temperatures. Among them, Control Example 1 uses 10% of compressed air for regeneration, and Control Example 2 uses 22% of compressed air for regeneration.

[0086] Table 4 Energy consumption comparison between Example 1 and Control Example

[0087]

[0088] from Figure 8-9As can be seen from Table 4, the present invention does not need to use additional compressed air to regenerate the air outlet unit, which can effectively reduce production energy consumption and save production costs.

[0089] In addition, the preparation process disclosed in the present invention has the characteristics of short process flow and few process equipment, which can effectively increase the reliability of the system. Since drying drugs need to be set in the conventional adsorption rotor. There is dynamic friction in the regeneration and drying process of the drugs, which will cause desiccant loss, and as the running time is prolonged, the material will be lost and need to be replaced regularly. The drugs in the traditional adsorption dryer will be broken into powder during the airflow flushing process, which will affect the subsequent filtering equipment. However, since the present invention adopts ice water dehumidification plus rotor adsorption, no drugs are needed inside, which can effectively save the maintenance cost of the equipment and reduce the cost of equipment replacement. At the same time, it can also avoid the particulate matter generated by the adsorption agent affecting the quality of the air, so as to ensure the quality of compressed air prepared in the downstream process.

[0090] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An air handling unit for deep purification and dehumidification, characterized in that: include: an inlet for introducing outside air; The pre-treatment section is used to filter the outside air and dehumidify the refrigerated part; The rotor section is used to dry, dehumidify and regenerate the air after dehumidification in the refrigeration part; The output section is used to adjust the output according to the downstream load and the quality of the upstream air after treatment; The rotor section includes: a rotor and a rotor regeneration component; the rotor adopts a direct expansion evaporator or / and an electric / steam heat exchanger drying device; The rotor adopts a single rotor structure, including a processing surface and a regeneration surface. The processing surface is used to deeply dehumidify the air after freezing and pre-dehumidification in the pre-treatment section to form processed air and transport it to the output section. The rotor regeneration component extracts part of the rotor processed air and heats it with fresh air and then sends it to the regeneration surface for regeneration of the rotor; The output section is provided with a temperature and humidity measuring component and a control valve. The temperature and humidity measuring component is used to detect the air treatment quality of the treated wind. The control valve controls the output section output, partial reflux or full reflux to after the filter and before the ice water coil according to the detection data of the temperature and humidity measuring component.

2. An air processing unit for deep air purification and dehumidification according to claim 1, characterized in that: The pretreatment section includes a filter device and a precooler connected in sequence through pipelines; A processing fan is provided at the rear of the pre-processing section for conveying the wind from the pre-processing section to the runner section.

3. An air processing unit for deep air purification and dehumidification according to claim 2, characterized in that: An evaporator is also provided between the filtering device and the precooler.

4. The air handling unit for deep air purification and dehumidification according to claim 2, characterized in that: The filtering device and the precooler are both set up in two stages, the purpose of which is to ensure that the air entering the rotor reaches the saturated low temperature that can be achieved by ice water as much as possible, so that the rotor can perform deep adsorption and dehumidification.

5. The air processing unit for deep air purification and dehumidification according to claim 1, characterized in that: The rotor regeneration component comprises a regeneration air inlet, a second filter component and a heater which are sequentially connected by a pipeline, wherein the regeneration air inlet is used to introduce fresh air, and the fresh air is filtered once by the second filter component; at the same time, the rotor regeneration component extracts part of the treated air and combines it with the fresh air, which is then heated by the heater and then sent to the regeneration surface to regenerate the rotor; The rotor regeneration assembly also includes a regeneration air blower and a control unit, wherein the control unit is used to extract part of the treated air and transport the treated air to the pipeline to be combined with the fresh air; The regenerated hot air passing through the wheel is discharged through the regeneration air fan.

6. An air processing unit for deep air purification and dehumidification according to claim 5, characterized in that: In the rotary wheel regeneration component, a condenser is provided between the second filter component and the heater.

7. An air processing unit for deep air purification and dehumidification according to claim 5, characterized in that: The ratio of the extracted and processed air by the rotary wheel regeneration component is 10-20%, and the flow ratio of the extracted and processed air to the regeneration air by the rotary wheel regeneration component is 1:

1.

8. A high-quality compressed air energy-saving preparation process for deep air purification and dehumidification, characterized in that: The air treatment unit as described in claim 1 is used for air treatment; the air is compressed by an air compressor, and then transported to a buffer tank for storage through a precision filter, and then transported to the user end.

9. The preparation process according to claim 8, characterized in that: The precision filter in the preparation process is a dust and oil removal precision filter.

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