Dehumidification system

Abstract

The utility model relates to the technical field of dehumidification, in particular to a dehumidification system. Comprising a treatment fan, a surface air cooler, a dehumidification rotating wheel and a heat treatment device, the processing fan is used for conveying to-be-dehumidified air according to a main flowing direction to form to-be-dehumidified airflow; the surface air cooler is used for condensing and dehumidifying the air flow to be dehumidified and dividing the condensed and dehumidified air flow into rotating wheel regeneration air and rotating wheel treatment air; the dehumidification rotating wheel comprises a treatment area and a desorption area, and the treatment area is used for carrying out dehumidification treatment on rotating wheel treatment air; the desorption area is used for achieving dehumidification desorption and heat recovery of the dehumidification rotating wheel by conducting multiple times of heat exchange with rotating wheel regeneration air. The heat treatment device is used for preheating rotating wheel regeneration air by using the recycled heat; meanwhile, the rotating wheel regeneration air is subjected to secondary heating, and high-temperature rotating wheel regeneration air capable of desorbing the dehumidification rotating wheel is generated; the heat treatment device is combined with the dehumidification rotating wheel, regeneration exhaust air waste heat and rotating wheel surface waste heat are fully utilized, and therefore the purpose of saving energy is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of dehumidification, in particular to a dehumidification system. Background Art

[0002] With the rapid development of lithium battery technology, the production environment specifications of lithium batteries are becoming more and more important. Among them, humidity has a particularly serious impact on the production of lithium battery cells. Generally, the dew point requirement of lithium battery production workshops is below -45°C, and to achieve this dew point, a low dew point rotary dehumidifier is required.

[0003] At present, there are two solutions for rotary dehumidifiers under low dew point conditions. The first is a high-temperature regeneration three-zone single dehumidification system, and the second is a dual-rotor low dew point dehumidification system. In the high-temperature regeneration three-zone single dehumidification system, when the rotor rotates out of the regeneration zone, the surface temperature of the rotor is very high. Staying in this state for a long time will lead to problems such as reduced wheel life and high energy consumption. The initial investment cost of the dual-rotor low dew point dehumidification system is high, and the equipment is large, resulting in excessive floor space. Utility Model Content

[0004] The utility model aims to provide a dehumidification system to solve the technical problems of large energy consumption and short life of the wheel in the existing dehumidification system.

[0005] In order to solve the above technical problems, the utility model is implemented by adopting the following technical solutions:

[0006] A dehumidification system, comprising:

[0007] Processing fan: used to transport the air to be dehumidified in the main flow direction to form the air flow to be dehumidified;

[0008] Surface cooler: used to condense and dehumidify the airflow to be dehumidified, and divide the airflow after condensation and dehumidification into rotor regeneration air and rotor treatment air;

[0009] Dehumidification wheel: comprising a processing area and a desorption area, wherein the processing area is used to dehumidify the wheel processing wind; the desorption area is used to achieve dehumidification, desorption and heat recovery of the dehumidification wheel by performing multiple heat exchanges with the wheel regeneration wind;

[0010] Heat treatment device: used for preheating the wheel regeneration air by utilizing the recovered heat; and used for secondary heating the wheel regeneration air to generate high-temperature wheel regeneration air capable of dehumidifying and desorbing the dehumidification wheel.

[0011] Optionally, the heat treatment device comprises:

[0012] Heat exchanger: used to preheat the rotor regeneration air using the recovered heat;

[0013] Heater: used for secondary heating the rotor regeneration air preheated by the heat exchanger to obtain high-temperature rotor regeneration air capable of circulating and desorbing the dehumidification rotor.

[0014] Optionally, the surface cooler is connected with an air inlet end, a first air outlet end and a second air outlet end; the air inlet end is connected with an air outlet of the processing fan, the first air outlet end is used to output the rotor regeneration air, and the second air outlet end is used to output the rotor processing air;

[0015] The area of ​​the dehumidification wheel corresponding to the second air outlet end is the processing area;

[0016] The desorption zone includes a regeneration zone, a precooling zone and a supercooling zone;

[0017] The area of ​​the dehumidification wheel corresponding to the first air outlet end of the surface cooler is a supercooling area, and the supercooling area is used to preheat the wheel regeneration air output by the surface cooler and then send it to the heat exchanger;

[0018] The area of ​​the dehumidification wheel corresponding to the air outlet of the heater is a regeneration zone, and the regeneration zone uses the high-temperature wheel regeneration wind output by the heater to perform dehumidification and desorption, thereby realizing the regeneration of the dehumidification wheel;

[0019] The precooling zone is located between the supercooling zone and the regeneration zone, and is used to exchange heat with the airflow passing through the regeneration zone. The airflow treated by the precooling zone is input into the heat exchanger, and heat exchange is performed with the rotor regeneration air preheated in the supercooling zone in the heat exchanger.

[0020] Optionally, a tee is installed at one end of the cooler, one port of the tee is connected to the air outlet of the cooler, and the other two ports of the tee are respectively configured as a first air outlet and a second air outlet.

[0021] Optionally, the dehumidification system further comprises a connector for directing the airflow passing through the regeneration zone to the precooling zone.

[0022] Optionally, the dehumidification system also includes a regeneration fan, the air inlet end of the regeneration fan is connected to the heat exchanger, and the air outlet end is connected to the outside, which is used to discharge the airflow that passes through the precooling zone and exchanges heat with the rotor regeneration air that is preheated in the supercooling zone.

[0023] Compared with the prior art, the technical solution provided by the utility model can at least achieve the following beneficial effects:

[0024] The dehumidification system provided in the present application divides the air flow after condensation and dehumidification of the surface cooler into rotor regeneration air and rotor treatment air. The rotor treatment air is output to the treatment area of ​​the dehumidification wheel for dehumidification, and the rotor regeneration air is output to the desorption area of ​​the dehumidification wheel. The dehumidification, desorption and heat recovery of the dehumidification wheel are realized by multiple heat exchanges with the desorption area. The heat treatment device can use the recovered heat to preheat the rotor regeneration air, thereby achieving the technical effect of energy saving. The heat treatment device can also perform secondary heating on the preheated rotor regeneration air to generate high-temperature rotor regeneration air for dehumidification and desorption, reducing the high temperature time of the rotor surface and effectively increasing the service life of the dehumidification wheel. Compared with the dual-rotor low dew point dehumidification system, the dehumidification system provided in the present application only needs to be configured with one dehumidification rotor, and can also meet the low dew point conditions below -45°C in lithium battery production, greatly reducing the equipment investment cost, reducing the complexity and volume of the equipment, and thus making the footprint smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 is a structural schematic diagram of a dehumidification system provided in an embodiment of the present application;

[0027] Figure 2 yes Figure 1 Schematic diagram of the structure of the dehumidification wheel.

[0028] Description of reference numerals:

[0029] 1. Processing fan; 11. Rotary regeneration air; 12. Rotary processing air; 2. Heater; 3. Heat exchanger; 4. Regeneration fan; 5. Surface cooler; 6. Dehumidification wheel; 61. Regeneration zone; 62. Precooling zone; 63. Subcooling zone; 64. Processing zone. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present disclosure / the present application to clearly and completely describe the technical solutions in the embodiments of the present disclosure / the present application. Obviously, the described embodiments are only part of the embodiments of the present disclosure / the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure / the present application and its application or use.

[0031] It should be noted that, for the purpose of clearer description, the “left side” and “right side” mentioned in this application are based on the directions shown in the drawings. Embodiment 1

[0032] This embodiment provides a dehumidification system, comprising: a processing fan 1, a surface cooler 5, and a dehumidification wheel 6;

[0033] The processing fan 1 is used to transport the air to be dehumidified along the main flow direction to form the air flow to be dehumidified; the air is driven by the processing fan 1, and after condensation and dehumidification by the surface cooler 5, it is divided into two air flows: the rotor regeneration air 11 and the rotor processing air 12. The dehumidification rotor 6 adsorbs and dehumidifies the rotor processing air 12, and the rotor regeneration air 11 is used to dehumidify and desorb the dehumidification rotor 6, thereby realizing the regeneration and utilization of the dehumidification rotor 6.

[0034] Specifically, the dehumidification wheel 6 includes a processing area 64 and a desorption area. The processing area 64 is used to dehumidify the wheel processing wind 12; the desorption area is used to achieve dehumidification, desorption and heat recovery of the dehumidification wheel 6 by performing multiple heat exchanges with the wheel regeneration wind 11.

[0035] The heat treatment device is used to treat the rotor regeneration air 11. More specifically, the heat treatment device is used to utilize the recovered heat to preheat the rotor regeneration air 11 through heat exchange; and to perform secondary heating on the rotor regeneration air 11 to generate high-temperature rotor regeneration air 11 to desorb the dehumidification rotor 6.

[0036] The air inlet end of the cooler 5 is connected to the processing fan 1, and the air outlet end of the cooler 5 is connected to two air outlet ends. For the convenience of description, the air outlet end for outputting the rotor regeneration wind 11 is named as the first air outlet end, and the air outlet end for outputting the rotor processing wind 12 is named as the second air outlet end. In this embodiment, a three-way pipe can be connected to the air outlet end of the cooler 5. During assembly, one port of the three-way pipe is connected to the air outlet end of the cooler 5, and the other two ports of the three-way pipe are respectively configured as the first air outlet end and the second air outlet end.

[0037] The desorption zone can be further divided into: a regeneration zone 61, a precooling zone 62 and a supercooling zone 63. Figure 2, the area corresponding to the second air outlet is the processing area 64; the area corresponding to the dehumidification wheel 6 and the first air outlet of the surface cooler 5 is the supercooling area 63, and the supercooling area 63 preheats the wheel regeneration wind 11 output by the surface cooler 5 and sends it to the heat exchanger 3; the area corresponding to the dehumidification wheel 6 and the air outlet of the heater 2 is the regeneration area 61, and the regeneration area 61 uses the high-temperature wheel regeneration wind 11 output by the heater 2 for dehumidification and desorption. The precooling area 62 is located between the supercooling area 63 and the regeneration area 61, and is used to exchange heat with the airflow passing through the regeneration area 61 again. The airflow after heat exchange with the precooling area 62 is input to the heat exchanger 3, and heat exchange is performed in the heat exchanger 3 with the wheel regeneration wind 11 preheated by the supercooling area 63. The wheel regeneration wind 11 passes through the desorption area multiple times, and the dehumidification, desorption and heat recovery of the dehumidification wheel 6 are achieved by multiple heat exchanges with the desorption area.

[0038] It should be noted that the four areas of the dehumidification wheel 6 are not fixed, but are rotated in sequence according to the rotation of the dehumidification wheel 6. Figure 1 When the dehumidification wheel 6 moves along Figure 1 The dehumidification wheel 6 rotates in the direction indicated by the middle arrow. The regeneration zone 61 can be sequentially rotated into the pre-cooling zone 62, the supercooling zone 63 and the treatment zone 64 as the dehumidification wheel 6 rotates. The dehumidification wheel 6 is regenerated and utilized in this cycle.

[0039] As an embodiment of the present application, the heat treatment device may include a heater 2 and a heat exchanger 3. The heat exchanger 3 is used to preheat the rotor regeneration air 11 using the recovered heat; the heater 2 is used to perform secondary heating on the rotor regeneration air 11 preheated by the heat exchanger 3 to obtain high-temperature rotor regeneration air 11, thereby dehumidifying and desorbing the dehumidification rotor 6.

[0040] The heat exchanger 3 may be a shell and tube heat exchanger, including a tube side and a shell side, and the tube side and the shell side are respectively provided with respective air inlets and air outlets. If the rotor regeneration wind 11 preheated by the supercooling zone 63 is input into the tube side of the heat exchanger 3, the airflow after heat exchange with the precooling zone 62 is input into the shell side of the heat exchanger 3; on the contrary, if the rotor regeneration wind 11 preheated by the supercooling zone 63 is input into the shell side of the heat exchanger 3, the airflow after heat exchange with the precooling zone 62 is input into the tube side of the heat exchanger 3. As an alternative, the heat exchanger 3 may also use a heat exchanger of other structures, as long as it can realize heat exchange of two airflows, it is applicable to the dehumidification system provided in this application.

[0041] In summary, the dehumidification system provided in this embodiment divides the airflow after condensation and dehumidification of the surface cooler into a rotor regeneration air 11 and a rotor treatment air 12. The rotor treatment air 12 is output to the treatment area 64 of the dehumidification wheel 6 for dehumidification, and the rotor regeneration air 11 is output to the desorption area of ​​the dehumidification wheel 6. The dehumidification, desorption and heat recovery of the dehumidification wheel 6 are achieved through multiple heat exchanges with the desorption area. The heat treatment device can use the recovered heat to preheat the rotor regeneration air 11, thereby achieving the technical effect of energy saving, and the heat treatment device can also perform secondary heating on the preheated rotor regeneration air 11 to generate dehumidified and desorbed high-temperature rotor regeneration air 11, which can effectively increase the service life of the dehumidification wheel 6. Compared with the dual-rotor low dew point dehumidification system, the dehumidification system provided in this application only needs to be configured with one dehumidification wheel 6, which greatly reduces the equipment investment cost, reduces the complexity and volume of the equipment, and thus makes the footprint smaller. Embodiment 2

[0042] The difference between this embodiment and the first embodiment is that the dehumidification system provided in this embodiment further includes a regeneration fan 4 and a connecting member.

[0043] See also Figure 1 The air inlet end of the regeneration fan 4 can be connected to the heat exchanger 3, and the air outlet end is connected to the outside, so as to discharge the airflow after passing through the precooling zone 62 and heat exchange with the rotor regeneration air 11 preheated in the supercooling zone 63.

[0044] The connecting member is used to guide the airflow passing through the regeneration zone 61 to the precooling zone 62. Specifically, the connecting member can be implemented by a ventilation duct.

[0045] The working process of the dehumidification system provided in this embodiment is described in detail below. Obviously, the described embodiment is only a part of the embodiments of this disclosure / application, but not all of the embodiments. The details are as follows:

[0046] When the regeneration temperature is 150°C, first turn on the treatment fan 1 and the regeneration fan 4, so that the gas Figure 1 Move in the direction indicated by the arrow in the figure, then turn on the heater 2 and the surface cooler 5 for preheating, and finally turn on the drive motor of the dehumidification wheel 6, so that the dehumidification wheel 6 rotates in the direction indicated by the arrow in the figure.

[0047] The air first passes through the surface cooler 5, where a portion of the water in the air is removed by condensation and then is divided into two parts under the action of the three-way pipe, one part as the wheel regeneration wind 11 and the other part as the wheel treatment wind 12; the wheel regeneration wind 11 enters the supercooling zone 63 of the dehumidification wheel 6, absorbs the remaining heat on the wheel surface and then passes through the heat exchanger 3 to exchange heat with the gas after regeneration and desorption in the heat exchanger 3, utilizes the waste heat, and then preheats the wheel regeneration wind 11 in advance; the heat exchanger 3 is connected to the heater 2, and part of the gas enters the heater 2, and is heated by the heater 2 After being heated, the gas is desorbed in the regeneration zone 61 of the dehumidification wheel 6. The desorbed air (about 100°C) passes through the pre-cooling zone 62 of the dehumidification wheel 6 at a high speed to cool the surface of the dehumidification wheel 6. At this time, the surface temperature of the regeneration zone 61 of the dehumidification wheel 6 is about 150°C. After that, it absorbs a part of the heat and exchanges heat with the wheel regeneration air 11 after absorbing heat in the wheel supercooling zone 63 through the heat exchanger 3. The high-temperature and high-humidity gas generated after the desorption of the wheel regeneration air 11 and the waste heat on the surface and inside of the wheel in the regeneration zone 61 are fully utilized to preheat the wheel regeneration air 11, thereby achieving the purpose of energy saving.

[0048] In the description of this disclosure / application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure / application can be understood according to specific circumstances.

[0049] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present disclosure / application, and these improvements and modifications should also be regarded as the scope of protection of the present disclosure / application.

Claims

1. A dehumidification system, characterized in that: include: Processing fan (1): used to convey the air to be dehumidified in the main flow direction to form a flow of air to be dehumidified; Surface cooler (5): used for condensing and dehumidifying the airflow to be dehumidified, and dividing the airflow after condensation and dehumidification into rotor regeneration air (11) and rotor treatment air (12); A dehumidification wheel (6): comprising a processing zone (64) and a desorption zone, wherein the processing zone (64) is used to perform dehumidification processing on the wheel processing air (12); and the desorption zone is used to achieve dehumidification, desorption and heat recovery of the dehumidification wheel (6) by performing multiple heat exchanges with the wheel regeneration air (11); A heat treatment device is used to preheat the rotor regeneration air (11) using the recovered heat; and to perform secondary heating on the rotor regeneration air (11) to generate high-temperature rotor regeneration air (11) capable of dehumidifying and desorbing the dehumidification rotor (6).

2. The dehumidification system according to claim 1, characterized in that: The heat treatment device comprises: Heat exchanger (3): used to utilize recovered heat to preheat the rotor regeneration air (11); Heater (2): used for secondary heating the rotor regeneration air (11) preheated by the heat exchanger (3), so as to obtain high-temperature rotor regeneration air (11) capable of circulating and desorbing the dehumidification rotor (6).

3. The dehumidification system according to claim 2, characterized in that: The surface cooler (5) is connected to an air inlet end, a first air outlet end and a second air outlet end; the air inlet end is in communication with an air outlet of the processing fan (1), the first air outlet end is used to output the rotor regeneration air (11), and the second air outlet end is used to output the rotor processing air (12); The area of ​​the dehumidification wheel (6) corresponding to the second air outlet end is the processing area (64); The desorption zone includes a regeneration zone (61), a precooling zone (62) and a supercooling zone (63); The area of ​​the dehumidification wheel (6) corresponding to the first air outlet end of the surface cooler (5) is the supercooling zone (63), and the supercooling zone (63) is used to preheat the wheel regeneration air (11) output by the surface cooler (5) and then send it into the heat exchanger (3); The area of ​​the dehumidification wheel (6) corresponding to the air outlet end of the heater (2) is the regeneration zone (61), and the regeneration zone (61) uses the high-temperature wheel regeneration air (11) output by the heater (2) to perform dehumidification and desorption, thereby achieving regeneration and utilization of the dehumidification wheel (6); The precooling zone (62) is located between the supercooling zone (63) and the regeneration zone (61) and is used to perform heat exchange with the airflow passing through the regeneration zone (61). The airflow treated by the precooling zone (62) is input into the heat exchanger (3) and performs heat exchange with the rotor regeneration air (11) preheated by the supercooling zone (63) in the heat exchanger (3).

4. The dehumidification system according to claim 3, characterized in that: It also comprises a three-way pipe, one port of which is connected to the gas outlet end of the surface cooler (5), and the other two ports of the three-way pipe are respectively configured as a first gas outlet end and a second gas outlet end.

5. The dehumidification system according to claim 3, characterized in that: It also includes a connecting piece, which is used to guide the airflow passing through the regeneration zone (61) to the pre-cooling zone (62).

6. The dehumidification system according to claim 3, characterized in that: It also includes a regeneration fan (4), the air inlet end of the regeneration fan (4) is connected to the heat exchanger (3), and the air outlet end is connected to the outside, and is used to discharge the airflow that passes through the precooling zone (62) and is heat-exchanged with the rotor regeneration air (11) that has been preheated in the supercooling zone (63).

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