Finned tube adsorption coating and adsorption rotating wheel composite dehumidification unit

Abstract

The utility model relates to the technical field of air conditioner dehumidification equipment, in particular to a finned tube adsorption coating and adsorption rotating wheel composite type dehumidification unit. A first-stage coating heat exchanger I and a treatment area of a second-stage dehumidification rotating wheel are sequentially connected to a dehumidification pipeline; a cold blowing area of the second-stage dehumidification rotating wheel, a regeneration heater of the second-stage dehumidification rotating wheel and a regeneration area of the second-stage dehumidification rotating wheel are sequentially connected to a regeneration pipeline, and the head end of the regeneration pipeline is connected to a dehumidification pipeline located between the first-stage coating heat exchanger I and a treatment area of the second-stage dehumidification rotating wheel; a first-stage coating heat exchanger II is connected to the regeneration pipeline positioned at the downstream of the regeneration area of the second-stage dehumidification rotating wheel; the coating dehumidification unit is adopted to replace a first-stage dehumidification rotating wheel of a conventional double-rotating-wheel dehumidification unit, high-temperature dry regeneration exhaust air of a second-stage dehumidification rotating wheel is used as part of regeneration inlet air of a first-stage coating heat exchanger II in a regeneration working condition, and medium-high-temperature hot water is used for regeneration of a coating. The requirement for high-temperature regeneration of the part is reduced, and energy saving is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning dehumidification equipment, in particular to a composite dehumidification unit of finned tube adsorption coating and adsorption rotor. Background Art

[0002] Dehumidification is a crucial step in air conditioning. Conventional processes typically require an air conditioning temperature range of 23±3°C and a relative humidity range of 40-70%. However, some production processes have higher environmental requirements. For example, in the production of cathode materials and battery cells for new energy lithium-ion batteries, the supply air dew point must be maintained between -70°C and -50°C, while the indoor dew point must be controlled between -50°C and -30°C.

[0003] In response to the above-mentioned air supply dew point requirements, most of the current dehumidification units use double-rotor dehumidification units. However, the use of double-rotor units has the disadvantage of requiring a high-grade regenerative heat source, resulting in high operating costs.

[0004] In recent years, a new technology has emerged: fin-tube coating dehumidification technology. Essentially, it involves adsorption dehumidification, where a layer of regenerable desiccant is coated on the outer fins of a fin-tube heat exchanger. The adsorbent material adsorbs and desorbs air flowing between the fins of the coil, achieving dehumidification and regeneration. Simultaneously, the adsorbent material exchanges heat with the cooling water and hot water within the coil. The cooling water removes the adsorption heat from the interior, lowering the temperature of the dehumidifying material, while the hot water heats the material from the inside for regeneration and desorption. This technology improves the dehumidifying material's dehumidification efficiency while also reducing the regeneration temperature requirement. Since isothermal or cooling dehumidification can be achieved by controlling the cooling water inlet temperature, the regeneration heat source required by the rotary dehumidifier is lowered compared to rotary dehumidification, achieving energy-efficient dehumidification.

[0005] CN101699177A and CN105757836A disclose such dehumidification heat exchangers, and CN113108385A discloses an integral fin tube adsorption coating dehumidification unit, which can be used for ordinary comfort air conditioning dehumidification, but cannot meet the dehumidification requirements under the above-mentioned low humidity or low dew point conditions.

[0006] CN217929025U and CN218179081U disclose the use of finned tubes with adsorbed coatings to provide stable air supply at low humidity and low dew points. However, in the case of air supply at ultra-low dew points, the coated dehumidification unit cannot meet the requirements. Utility Model Content

[0007] The purpose of the utility model is to provide a fin tube adsorption coating and adsorption rotor composite dehumidification unit, using the coating dehumidification unit to replace the conventional double-rotor dehumidification unit's first-stage rotor dehumidification to solve the defects raised in the above-mentioned background technology.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] A fin tube adsorption coating and adsorption rotor composite dehumidification unit includes a primary coating heat exchanger I and a secondary dehumidification rotor, wherein the treatment areas of the primary coating heat exchanger I and the secondary dehumidification rotor are sequentially connected to the dehumidification pipeline, the cold blowing area of ​​the secondary dehumidification rotor, the regeneration heater of the secondary dehumidification rotor, and the regeneration area of ​​the secondary dehumidification rotor are sequentially connected to the regeneration pipeline, the head end of the regeneration pipeline is connected to the dehumidification pipeline located between the primary coating heat exchanger I and the treatment area of ​​the secondary dehumidification rotor; the primary coating heat exchanger II is connected to the regeneration pipeline located downstream of the regeneration area of ​​the secondary dehumidification rotor.

[0010] As a further improvement, the dehumidification fresh air pipeline located upstream of the first-level coating heat exchanger I is connected to a primary filter and a front surface cooler.

[0011] As a further improvement, a dehumidification return air duct is connected to the dehumidification pipeline located between the first-level coating heat exchanger I and the second-level dehumidification wheel; a first medium-efficiency filter and a medium-surface cooler are connected to the dehumidification pipeline located between the dehumidification return air duct and the second-level dehumidification wheel.

[0012] As a further improvement, the dehumidification air supply pipeline located downstream of the processing area of ​​the secondary dehumidification wheel is connected to a post-cooler, a post-heater and a second medium-efficiency filter.

[0013] As a further improvement, a fresh air fan, a treatment air fan and a regeneration air fan are respectively connected to the dehumidification pipeline and the regeneration pipeline.

[0014] As a further improvement, a first air valve is provided on the regeneration pipeline between the regeneration pipeline of the secondary dehumidification wheel and the primary coating heat exchanger II, and a regeneration fresh air inlet pipe is provided on the regeneration pipeline between the regeneration area of ​​the secondary dehumidification wheel and the first air valve, and a second air valve is provided on the regeneration fresh air inlet pipe; the first air valve is closed and the second air valve is opened, and the regeneration exhaust air of the secondary wheel is discharged through the pipeline, or the first air valve and the second air valve are opened at the same time, and the regeneration fresh air enters the regeneration pipeline through the pipeline, and after mixing with the regeneration exhaust air of the secondary wheel, serves as the regeneration inlet air of the primary coating heat exchanger.

[0015] As a further improvement, the first-level coating heat exchanger I and the first-level coating heat exchanger II are a group of heat exchangers that rotate between dehumidification working conditions and regeneration working conditions.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The coated dehumidification section replaces the first-stage dehumidification rotor section of the conventional double-rotor dehumidification unit, while the second-stage dehumidification rotor still uses the traditional low-dew-point dehumidification rotor, thus meeting the demand for ultra-low dew-point air supply;

[0018] 2. The high-temperature dry regeneration exhaust air of the secondary dehumidification wheel section is used as part of the regeneration air for the primary coating heat exchanger in the regeneration condition. This can improve the regeneration efficiency of the primary coating heat exchanger and achieve the purpose of energy saving.

[0019] 3. The coating dehumidification section replaces the first-stage dehumidification wheel section and uses medium-high temperature hot water for regeneration, reducing the need for high-temperature regeneration of the original first-stage wheel section, and correspondingly reducing the consumption of high-grade energy such as electricity or steam, thereby achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0022] In the figure: 1. Primary coating heat exchanger I; 2. Secondary dehumidification rotor; 3. Secondary dehumidification rotor treatment area; 4. Secondary dehumidification rotor regeneration area; 5. Secondary dehumidification rotor cold blowing area; 6. Secondary dehumidification rotor regeneration heater; 7. Dehumidification pipeline; 7-1. Dehumidification fresh air pipeline; 7-2. Dehumidification supply air pipeline; 8. Regeneration pipeline; 9. Primary efficiency filter; 10. Front surface cooler; 11. Dehumidification return air duct; 12. First medium efficiency filter; 13. Middle surface cooler; 14. Rear surface cooler; 15. Rear heater; 16. Second medium efficiency filter; 17. Primary coating heat exchanger II; 18. First air valve; 19. Primary coating heat exchanger regeneration air inlet fresh air pipeline / Secondary dehumidification rotor regeneration exhaust pipeline; 20. Second air valve; 21. Fresh air fan; 22. Treatment fan; 23. First regeneration fan; 24. Second regeneration fan. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, a fin tube adsorption coating and adsorption rotor composite dehumidification unit includes a primary coating heat exchanger Ⅰ1 and a secondary dehumidification rotor 2. The secondary dehumidification rotor 2 is provided with a treatment zone 3, a regeneration zone 4 and a cold blowing zone 5 in sequence along its rotation direction. The secondary dehumidification rotor 2 is also provided with a regeneration heater 6; the primary coating heat exchanger Ⅰ1 and the treatment zone 3 of the secondary dehumidification rotor 2 are connected to the dehumidification pipeline 7 in sequence, the cold blowing zone 5 of the secondary dehumidification rotor 2, the regeneration heater 6 of the secondary dehumidification rotor 2, and the regeneration zone 4 of the secondary dehumidification rotor 2 are connected to the regeneration pipeline 8 in sequence, and the head end of the regeneration pipeline 8 is connected to the dehumidification pipeline 7 located between the primary coating heat exchanger Ⅰ1 and the treatment zone 3 of the secondary dehumidification rotor 2.

[0025] The dehumidification fresh air pipeline 7-1 located upstream of the first-level coating heat exchanger I1 is connected to a primary filter 9 and a front surface cooler 10.

[0026] The dehumidification pipeline 7 located between the primary coating heat exchanger Ⅰ1 and the secondary dehumidification wheel 2 is connected to the dehumidification return air pipe 11; the dehumidification pipeline 7 located between the dehumidification return air pipe 11 and the regeneration pipeline 8 is connected to the first medium efficiency filter 12 and the intermediate surface cooler 13.

[0027] The dehumidification air supply pipeline 7 - 2 located downstream of the processing area 3 of the secondary dehumidification wheel 2 is connected to an after-cooler 14 , an after-heater 15 and a second medium-efficiency filter 16 .

[0028] The dehumidification pipeline 7 and the regeneration pipeline 8 are respectively connected to a fresh air fan 21, a treatment air fan 22, a first regeneration air fan 23 and a second regeneration air fan 24.

[0029] The regeneration pipeline 8 located downstream of the regeneration zone 4 of the secondary dehumidification wheel 2 is connected to the primary coating heat exchanger II 17. The primary coating heat exchanger I1 and the primary coating heat exchanger II 17 are a group. According to the needs of dehumidification and regeneration conditions, they rotate between the dehumidification pipeline 7 and the regeneration pipeline 8. In the initial state, Figure 1 As shown, the first-level coating heat exchanger Ⅰ1 in the dehumidification condition is connected to the dehumidification pipeline 7 for dehumidification, and the first-level coating heat exchanger Ⅱ17 in the regeneration condition is connected to the regeneration pipeline 8 for regeneration; when the first-level coating heat exchanger Ⅱ17 completes regeneration, the first-level coating heat exchanger Ⅱ17 can be switched to the dehumidification pipeline 7 for dehumidification, and the first-level coating heat exchanger Ⅰ1 can be switched to the regeneration pipeline 8 for regeneration.

[0030] A first air valve 18 is provided on the regeneration pipeline 8 between the regeneration area 4 of the secondary dehumidification rotor 2 and the primary coating heat exchanger II 17, and a pipeline 19 is provided on the regeneration pipeline 8 between the regeneration area 4 of the secondary dehumidification rotor 2 and the first air valve 18. The pipeline 19 serves as the fresh air inlet pipeline for the regeneration of the primary coating heat exchanger or the regeneration exhaust pipeline for the secondary dehumidification rotor, and a second air valve 20 is provided on the pipeline 19; the first air valve 18 is closed and the second air valve 20 is opened, and the air is exhausted through the pipeline 19, or the first air valve 18 and the second air valve 20 are opened at the same time, and the regenerated fresh air enters the regeneration pipeline 8 through the pipeline 19.

[0031] In this embodiment:

[0032] like Figure 1 As shown, the primary filter 9, the fresh air blower 21, the front surface cooler 10, the first-level I coating heat exchanger 1, the dehumidification return air duct 11, the processing fan 22, the first medium-efficiency filter 12, the medium surface cooler 13, the processing area 3 of the secondary dehumidification wheel 2, the rear surface cooler 14, the rear heater 15 and the second medium-efficiency filter 16 are sequentially connected to the dehumidification pipeline 7;

[0033] The cold blowing zone 5 of the secondary dehumidification wheel 2, the regeneration heater 6 of the secondary dehumidification wheel 2, the regeneration zone 4 of the secondary dehumidification wheel 2, the first regeneration fan 23, the pipeline 19, the first air valve 18, the first coating heat exchanger II 17 and the second regeneration fan 24 are connected to the regeneration pipeline 8 in sequence.

[0034] The processing flow of the first-stage coating heat exchanger Ⅰ1 is as follows: the outdoor fresh air is purified and filtered by the primary filter 9, and then driven by the fresh air fan 21, and then cooled and dehumidified by the front surface cooler 10, and processed into low-temperature and high-relative-humidity air, and then passed through the first-stage coating heat exchanger Ⅰ1 in the dehumidification working state for adsorption and dehumidification, and is processed into low-temperature and low-relative-humidity dry air.

[0035] The process flow of the secondary dehumidification wheel 2 is as follows: The low-dew-point return air from the room passes through the dehumidification return air duct 11 and is mixed with the low-temperature, low-relative-humidity dry air dehumidified by the aforementioned primary I coated heat exchanger 1. This air is then heated by the treatment fan 22, purified and filtered by the first medium-efficiency filter 12, and cooled to low-temperature, dry air by the intermediate surface cooler 13. A portion of this low-temperature, dry air passes through the treatment zone 3 of the secondary dehumidification wheel 2 for further adsorption, dehumidification, and drying, becoming ultra-low-dew-point dry air. Depending on the supply air temperature and humidity requirements, this air can be further cooled by the post-surface cooler 14 or heated by the post-heater 15. It is then purified and filtered by the second medium-efficiency filter 16 before being delivered to the room.

[0036] The regeneration process of the secondary dehumidification wheel 2 is as follows: the other part of the low-temperature dry air that has been cooled by the intermediate surface cooler 13 passes through the cold blowing zone 5 of the secondary dehumidification wheel 2, and cools the secondary dehumidification wheel 2 that has just passed through the regeneration zone 4, thereby reducing the temperature of the wheel core in this area so that the air can immediately achieve low dew point dehumidification when entering the processing zone 3; in addition, after the air passes through the cold blowing zone 5, it can obtain high-temperature low-dew point dry air (on the one hand, it can reduce the heat of regeneration heating, and on the other hand, it can better regenerate and dry the secondary dehumidification wheel 2), and then pass through the regeneration heater 6 of the secondary dehumidification wheel 2 to become high-temperature low-dew point dry air, and then flow through the regeneration zone 4 of the secondary dehumidification wheel 2 to regenerate the secondary dehumidification wheel 2. The exhaust air after regeneration becomes medium-high temperature dry air, and then is discharged to the outside through the first regeneration fan 23, or serves as the regeneration intake air of the primary coating heat exchanger II 17 in the regeneration condition.

[0037] The regeneration process of the first-stage coating heat exchanger II17 is as follows:

[0038] Working condition 1 (regeneration working condition of first-stage coating heat exchanger Ⅱ17): Figure 1 As shown, the first-level coating heat exchanger Ⅱ17 is switched to the regeneration pipeline 8 for regeneration; at the same time, the first air valve 18 and the second air valve 20 are opened, and the outdoor fresh air enters the regeneration pipeline 8 through the pipeline 19, and is mixed with the exhaust air from the regeneration zone 4 passing through the secondary dehumidification wheel 2, and then passes through the first-level coating heat exchanger Ⅱ17 to regenerate and desorb the first-level coating heat exchanger Ⅱ17. The regenerated air becomes high-temperature and high-humidity air, which is driven by the second regeneration fan 24 and discharged outdoors.

[0039] Operating condition 2 (condition where the primary coating heat exchanger II 17 does not require regeneration): According to the control method disclosed in CN118328478A, the coating dehumidification section composed of the primary coating heat exchanger I1 and the primary coating heat exchanger II 17 has a dual-channel simultaneous dehumidification condition, that is, the primary coating heat exchanger I1 and the primary coating heat exchanger II 17 are simultaneously switched to the dehumidification pipeline 7 for dehumidification. During this period, the primary coating heat exchanger II 17 does not regenerate; the first air valve 18 is closed and the second air valve 20 is opened, and the exhaust air passing through the regeneration zone 4 of the secondary dehumidification rotor 2 is directly discharged to the outside through the pipeline 19;

[0040] Subsequent working conditions: Following the above working condition 2, the first-level coated heat exchanger I1 enters the regeneration process, and then the above working conditions are repeated, and the cycle continues to operate.

[0041] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A fin tube adsorption coating and adsorption rotor composite dehumidification unit, characterized by: It includes a primary coating heat exchanger I and a secondary dehumidification wheel, the treatment areas of the primary coating heat exchanger I and the secondary dehumidification wheel are connected to the dehumidification pipeline in sequence, the cold blowing area of ​​the secondary dehumidification wheel, the regeneration heater of the secondary dehumidification wheel, and the regeneration area of ​​the secondary dehumidification wheel are connected to the regeneration pipeline in sequence, and the head end of the regeneration pipeline is connected to the dehumidification pipeline located between the primary coating heat exchanger I and the treatment area of ​​the secondary dehumidification wheel; the primary coating heat exchanger II is connected to the regeneration pipeline located downstream of the regeneration area of ​​the secondary dehumidification wheel.

2. The fin tube adsorption coating and adsorption rotor composite dehumidification unit according to claim 1, characterized in that: The dehumidification fresh air pipeline located upstream of the first-level coating heat exchanger I is connected to a primary filter and a front surface cooler.

3. The fin tube adsorption coating and adsorption rotor composite dehumidification unit according to claim 1, characterized in that: A dehumidification return air duct is connected to the dehumidification pipeline between the first-level coating heat exchanger I and the second-level dehumidification wheel; a first medium-efficiency filter and a medium-surface cooler are connected to the dehumidification pipeline between the dehumidification return air duct and the second-level dehumidification wheel.

4. The fin tube adsorption coating and adsorption rotor composite dehumidification unit according to claim 1, characterized in that: The dehumidification air supply pipeline located downstream of the processing area of ​​the secondary dehumidification wheel is connected with a post-surface cooler, a post-heater and a second medium-efficiency filter.

5. The fin tube adsorption coating and adsorption rotor composite dehumidification unit according to claim 1, characterized in that: The dehumidification pipeline and the regeneration pipeline are respectively connected with a fresh air fan, a treatment air fan and a regeneration air fan.

6. The fin tube adsorption coating and adsorption wheel composite dehumidification unit according to claim 1, characterized in that: A first air valve is provided on the regeneration pipeline between the regeneration pipeline of the secondary dehumidification wheel and the primary coating heat exchanger II, and a regeneration fresh air inlet pipe is provided on the regeneration pipeline between the regeneration area of ​​the secondary dehumidification wheel and the first air valve, and a second air valve is provided on the regeneration fresh air inlet pipe; the first air valve is closed and the second air valve is opened, and the regeneration exhaust air of the secondary wheel is discharged through the pipeline, or the first air valve and the second air valve are opened at the same time, and the regeneration fresh air enters the regeneration pipeline through the pipeline, and after mixing with the regeneration exhaust air of the secondary wheel, serves as the regeneration inlet air of the primary coating heat exchanger.

7. The fin tube adsorption coating and adsorption rotor composite dehumidification unit according to claim 1, characterized in that: The first-level coating heat exchanger I and the first-level coating heat exchanger II are a group of heat exchangers that rotate between dehumidification working conditions and regeneration working conditions.

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