Periodic adsorption-desorption type inner cooling and rotating wheel composite deep dehumidification system

Abstract

The invention relates to a periodic adsorption-desorption type inner cooling and rotating wheel composite deep dehumidification system. The system comprises a dehumidification system, a regeneration system, an air conditioning system, a compressor, a four-way valve, an adsorption / desorption type heat exchanger, a throttling valve, a dehumidification rotating wheel, an air feeder, an exhaust fan and an air valve, wherein the heat exchange surface of the adsorption / desorption type heat exchanger is covered with a moisture absorption material. Outdoor air is sequentially subjected to the processes of cooling and dehumidification of the adsorption type evaporator, isenthalpy dehumidification of the dehumidification rotating wheel and secondary cooling and dehumidification of the adsorption type evaporator, and the treatment process of large-humidity-difference and deep dehumidification of the air is completed. Meanwhile, return air is sequentially subjected to the treatment processes of temperature rise and moisture absorption of the desorption type condenser, moisture absorption of the dehumidification rotating wheel and moisture absorption of the desorption type condenser, and the regeneration process of a system adsorbent is completed. According to the system, through switching of a four-way valve and an air valve of an air conditioning system, periodic switching between the adsorption type evaporator and the desorption type condenser, between the dehumidification area and the regeneration area of the dehumidification rotating wheel and between an air supply pipeline and an air return pipeline is achieved. The energy is reasonably utilized, and the regeneration temperature in the regeneration process can be effectively reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of deep dehumidification, in particular to a periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system. Technical Background

[0002] With the rapid development of modern industry, the temperature and humidity requirements for industrial production environments are getting higher and higher. In particular, low-humidity industries such as medicine, food, glass, and lithium batteries (the air supply dew point temperature is lower than -10°C) have very stringent requirements on environmental humidity, which provides a broad market for the application of dehumidification systems. At the same time, it also poses challenges to the system's large humidity difference and deep dehumidification capabilities. Existing deep dehumidification systems usually use multi-stage rotary dehumidification devices to deeply dehumidify the air. The regeneration temperature is above 100°C, and electric heating is required to meet the temperature requirements of the regeneration air. This undoubtedly leads to high energy consumption and unreasonable energy utilization of the system. At the same time, the system's dehumidification capacity is poor, which seriously restricts its promotion and application in low-humidity industries. Therefore, new, efficient, low-carbon, large humidity difference, and deep dehumidification technology paths need to be explored urgently. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to comprehensively utilize the cold and heat of the air-conditioning system, fully utilize the condensation heat of the air-conditioning system while effectively reducing the adsorbent regeneration temperature, improve the energy efficiency of the air-conditioning system, and provide a new type of high-efficiency, low-carbon, large humidity difference, deep dehumidification treatment technology for the low-humidity industry.

[0004] To achieve the above object, the present invention provides a periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system, the system comprising a dehumidification system, a regeneration system and an air conditioning system;

[0005] The dehumidification system is mainly composed of a blower 1, an absorption / desorption heat exchanger 1 2, a dehumidification wheel 3, an absorption / desorption heat exchanger 2 4, an absorption / desorption heat exchanger 3 6, an absorption / desorption heat exchanger 4 7, an air valve 1 11, and an air valve 3 13. The outlet of the blower 1 can be divided into two routes: one route is sequentially connected to the air valve 1 11, the absorption / desorption heat exchanger 1 2, the dehumidification wheel 3, and the absorption / desorption heat exchanger 2 4; the other route is sequentially connected to the air valve 3 13, the absorption / desorption heat exchanger 3 6, the dehumidification wheel 3, and the absorption / desorption heat exchanger 4 7; the above two routes are switched by controlling the opening and closing of the air valve 1 11 and the air valve 3 13;

[0006] The adsorption / desorption heat exchanger is a finned heat exchanger with an adsorbent coated on the surface. The types of adsorbents include calcium chloride, lithium chloride, silica gel, and silica gel / halogen salt composite materials;

[0007] The dehumidification wheel has half of its dehumidification zone and half of its regeneration zone. Each time the motor is turned on and off, the dehumidification wheel rotates half a circle, thereby realizing the periodic switching of the dehumidification zone and the regeneration zone of the dehumidification wheel.

[0008] Adsorbents in dehumidification wheels include calcium chloride, lithium chloride, molecular sieves, activated carbon, silica gel, and silica gel / halogen salt composites;

[0009] The carrier materials in the dehumidification wheel include glass fiber, ceramic fiber, asbestos fiber;

[0010] The flow channel types in the dehumidification wheel include hexagonal, triangular, square, sinusoidal, honeycomb, etc.

[0011] The regeneration system is mainly composed of an exhaust fan 5, an absorption / desorption heat exchanger 1 2, a dehumidification wheel 3, an absorption / desorption heat exchanger 2 4, an absorption / desorption heat exchanger 3 6, an absorption / desorption heat exchanger 4 7, an air valve 2 12, and an air valve 4 14. The connection to the inlet of the exhaust fan 5 can be divided into two routes: one route is connected to the inlet of the exhaust fan 5 via the absorption / desorption heat exchanger 4 7, the dehumidification wheel 3, the absorption / desorption heat exchanger 3 6, and the air valve 2 12 in sequence; the other route is connected to the inlet of the exhaust fan 5 via the absorption / desorption heat exchanger 2 4, the dehumidification wheel 3, the absorption / desorption heat exchanger 1 2, and the air valve 4 14 in sequence; the above two routes are switched by controlling the opening and closing of the air valve 2 12 and the air valve 4 14.

[0012] The air conditioning system is mainly composed of a compressor 8, a four-way valve 9, an absorption / desorption heat exchanger 1 2, an absorption / desorption heat exchanger 2 4, an absorption / desorption heat exchanger 3 6, an absorption / desorption heat exchanger 4 7, and a throttle valve 10. The exhaust port of the compressor 1 can be divided into two routes through the four-way valve 9: one route is sequentially connected to the absorption / desorption heat exchanger 4 7, the absorption / desorption heat exchanger 3 6, the throttle valve 10, the absorption / desorption heat exchanger 1 2, the absorption / desorption heat exchanger 2 4, and then connected to the suction pipe of the four-way valve 9; the other route is sequentially connected to the absorption / desorption heat exchanger 2 4, the absorption / desorption heat exchanger 1 2, the throttle valve 10, the absorption / desorption heat exchanger 3 6, the absorption / desorption heat exchanger 4 7, and then connected to the suction pipe of the four-way valve 9; the suction pipe of the four-way valve 9 is connected to the suction port of the compressor 8;

[0013] Compressor types include rotary, scroll, and piston;

[0014] Throttle valve types include capillary tube, thermal expansion valve, and electronic expansion valve.

[0015] The dehumidification system and the regeneration system can realize periodic switching by controlling the on and off of the four-way valve 9, the motor of the dehumidification wheel 3, and the opening and closing of the air valve 1 11, the air valve 2 12, the air valve 3 13, and the air valve 4 14:

[0016] When the air valve 11 and the air valve 2 12 are opened, the air blower 1, the air valve 11, the absorption / desorption heat exchanger 1 2, the lower half of the dehumidification wheel 3, and the absorption / desorption heat exchanger 2 4 constitute a dehumidification system. The absorption / desorption heat exchanger 1 2 and the absorption / desorption heat exchanger 2 4 act as evaporators of the air conditioning system to achieve cooling and dehumidification of the air. The lower half of the dehumidification wheel 3 serves as the dehumidification zone of the dehumidification wheel to achieve isenthalpy control of the air. Dehumidification; the absorption / desorption heat exchanger 4 7, the upper half of the dehumidification wheel 3, the absorption / desorption heat exchanger 3 6, the air valve 2 12, and the exhaust fan 5 constitute a regeneration system, and the absorption / desorption heat exchanger 4 7 and the absorption / desorption heat exchanger 3 6 act as the condenser of the air conditioning system to achieve heating of the air, thereby completing the regeneration process of the adsorbent in the absorption / desorption heat exchanger 4 7, the upper half of the dehumidification wheel 3, and the absorption / desorption heat exchanger 3 6;

[0017] When the four-way valve 9 is powered on and the air valve 3 13 and the air valve 4 14 are opened, the air blower 1, the air valve 3 13, the absorption / desorption heat exchanger 3 6, the upper half of the dehumidification wheel 3, and the absorption / desorption heat exchanger 4 7 constitute a dehumidification system. The absorption / desorption heat exchanger 3 6 and the absorption / desorption heat exchanger 4 7 act as evaporators of the air conditioning system to achieve cooling and dehumidification of the air. The upper half of the dehumidification wheel 3 serves as the dehumidification zone of the dehumidification wheel to achieve cooling and dehumidification of the air. The isenthalpic dehumidification; the adsorption / desorption heat exchanger 24, the lower half of the dehumidification wheel 3, the adsorption / desorption heat exchanger 12, the air valve 414, and the exhaust fan 5 constitute a regeneration system, and the adsorption / desorption heat exchanger 24 and the adsorption / desorption heat exchanger 12 act as the condenser of the air conditioning system to achieve the heating of the air, and then complete the adsorption / desorption heat exchanger 24, the lower half of the dehumidification wheel 3, and the adsorption / desorption heat exchanger 12. Beneficial effects of the present invention:

[0018] The present invention comprehensively utilizes the cold and heat of the air conditioning system, and recycles energy, making the system highly efficient, energy-saving and low-carbon;

[0019] The present invention fully recovers and utilizes the condensation heat of the air conditioning system to provide a stable heat source for the system regeneration process;

[0020] The internally cooled coupled rotary dehumidifier of the present invention can effectively reduce the regeneration temperature of the adsorbent, the condensation temperature of the air conditioning system is low, the evaporation temperature is higher than that of the traditional condensation dehumidification air conditioning, and the system performance is high;

[0021] The internally cooled coupled rotary dehumidifier of the present invention can realize a large humidity difference and a deep dehumidification process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system of the present invention.

[0023] Numbers in the figure: 1-air supply fan, 2-absorption / desorption heat exchanger 1, 3-dehumidification wheel, 4-absorption / desorption heat exchanger 2, 5-exhaust fan, 6-absorption / desorption heat exchanger 3, 7-absorption / desorption heat exchanger 4, 8-compressor, 9-four-way valve, 10-throttle valve, 11-air valve 1, 12-air valve 2, 13-air valve 3, 14-air valve 4. DETAILED DESCRIPTION

[0024] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0025] like Figure 1 As shown, in this embodiment, a periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system includes a dehumidification system, a regeneration system and an air conditioning system.

[0026] The dehumidification system is composed of a blower 1, a wind valve 11, a suction / desorption type heat exchanger 1 2, a dehumidification wheel 3, and a suction / desorption type heat exchanger 2 4 connected via a wind duct, or is composed of a blower 1, a wind valve 3 13, a suction / desorption type heat exchanger 3 6, a dehumidification wheel 3, and a suction / desorption type heat exchanger 4 7 connected via a wind duct;

[0027] The regeneration system is composed of an absorption / desorption heat exchanger 4 7, a dehumidification wheel 3, an absorption / desorption heat exchanger 3 6, a second air valve 12, and an exhaust fan 5 connected via an air duct, or is composed of an absorption / desorption heat exchanger 2 4, a dehumidification wheel 3, an absorption / desorption heat exchanger 1 2, a fourth air valve 14, and an exhaust fan 5 connected via an air duct;

[0028] The air conditioning system is mainly composed of a compressor 8, a four-way valve 9, an absorption / desorption heat exchanger 1 2, an absorption / desorption heat exchanger 2 4, an absorption / desorption heat exchanger 3 6, an absorption / desorption heat exchanger 4 7, and a throttle valve 10 connected by copper pipes.

[0029] In this embodiment, the dehumidification system and the regeneration system can be periodically switched by controlling the on and off of the four-way valve 9, the dehumidification wheel 3 motor, and the opening and closing of air valve 1 11, air valve 2 12, air valve 3 13, and air valve 4 14.

[0030] A periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system includes a dehumidification process and a regeneration process, and the above processes can be carried out simultaneously and switched periodically.

[0031] like Figure 1As shown, the air valve 11 and the air valve 2 12 are opened. At this time, the absorption / desorption heat exchanger 1 2 and the absorption / desorption heat exchanger 2 4 act as the evaporator of the air conditioning system, and the absorption / desorption heat exchanger 4 7 and the absorption / desorption heat exchanger 3 6 act as the condenser of the air conditioning system; Figure 1 As shown, the working principle of the dehumidification process is as follows: the outdoor air is sent by the blower 1 to the absorption / desorption heat exchanger 2 through the air valve 11 for cooling and dehumidification, and then is dehumidified by the dehumidification zone of the dehumidification wheel 3, and then is cooled and dehumidified by the absorption / desorption heat exchanger 2 4, thereby completing the process of large humidity difference and deep dehumidification of the air, and finally sent to the target area; at the same time, Figure 1 As shown, the working principle of the regeneration process is as follows: the return air is drawn by the exhaust fan 5 to the absorption / desorption type heat exchanger 4 7 to increase the temperature and absorb moisture, then absorb moisture in the regeneration zone of the dehumidification wheel 3, and then absorb moisture in the absorption / desorption type heat exchanger 3 6, thereby completing the regeneration process of the adsorbent in the absorption / desorption type heat exchanger 4 7, the dehumidification wheel 3, and the absorption / desorption type heat exchanger 3 6, and finally discharged to the outside through the air valve 2 12 and the exhaust fan 5;

[0032] When the adsorbent in the absorption / desorption heat exchanger 1 2, the dehumidification zone of the dehumidification wheel 3, and the absorption / desorption heat exchanger 2 4 is close to saturation, the four-way valve 9 is energized and the air valve 3 13 and the air valve 4 14 are opened. At this time, the absorption / desorption heat exchanger 3 6 and the absorption / desorption heat exchanger 4 7 act as the evaporator of the air conditioning system, and the absorption / desorption heat exchanger 2 4 and the absorption / desorption heat exchanger 1 2 act as the condenser of the air conditioning system; Figure 1 As shown, the working principle of the dehumidification process is as follows: the outdoor air is sent by the blower 1 to the absorption / desorption heat exchanger 3 6 through the air valve 3 13 for cooling and dehumidification, and then is dehumidified by the dehumidification zone of the dehumidification wheel 3, and then is cooled and dehumidified by the absorption / desorption heat exchanger 4 7, thereby completing the process of large humidity difference and deep dehumidification of the air, and finally sent to the target area; at the same time, Figure 1 As shown, the working principle of the regeneration process is as follows: the return air is drawn by the exhaust fan 5 to the absorption / desorption heat exchanger 2 4 to increase the temperature and absorb moisture, then absorb moisture in the regeneration zone of the dehumidification wheel 3, and then absorb moisture in the absorption / desorption heat exchanger 1 2, thereby completing the regeneration process of the adsorbent in the absorption / desorption heat exchanger 2 4, the dehumidification wheel 3, and the absorption / desorption heat exchanger 1 2, and finally discharged to the outside through the air valve 4 14 and the exhaust fan 5;

[0033] By controlling the on and off of the four-way valve 9, the dehumidification wheel 3 motor and the opening and closing of air valve 1 11, air valve 2 12, air valve 3 13 and air valve 4 14, the absorption / desorption heat exchanger acting as the evaporator and condenser, the dehumidification zone and regeneration zone of the dehumidification wheel, and the periodic switching of the supply and return air ducts are enabled, thereby realizing the periodic absorption-desorption of the air by the system with a large humidity difference and deep dehumidification.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system, characterized in that: The system includes a dehumidification system, a regeneration system and an air conditioning system; The dehumidification system is mainly composed of an air supply fan (1), an absorption / desorption heat exchanger 1 (2), a dehumidification wheel (3), an absorption / desorption heat exchanger 2 (4), an absorption / desorption heat exchanger 3 (6), an absorption / desorption heat exchanger 4 (7), an air valve 1 (11), and an air valve 3 (13). The outlet of the air supply fan (1) can be divided into two routes: one route is connected in sequence to the air valve 1 (11), the absorption / desorption heat exchanger 1 (2), the dehumidification wheel (3), and the absorption / desorption heat exchanger 2 (4); the other route is connected in sequence to the air valve 3 (13), the absorption / desorption heat exchanger 3 (6), the dehumidification wheel (3), and the absorption / desorption heat exchanger 4 (7); the above two routes are switched by controlling the opening and closing of the air valve 1 (11) and the air valve 3 (13); The regeneration system is mainly composed of an exhaust fan (5), the absorption / desorption heat exchanger 1 (2), the dehumidification wheel (3), the absorption / desorption heat exchanger 2 (4), the absorption / desorption heat exchanger 3 (6), the absorption / desorption heat exchanger 4 (7), a second air valve (12), and a fourth air valve (14). The connection to the inlet of the exhaust fan (5) can be divided into two routes: one route is connected to the inlet of the exhaust fan (5) in sequence through the absorption / desorption heat exchanger 4 (7), the dehumidification wheel (3), the absorption / desorption heat exchanger 3 (6), and the second air valve (12); the other route is connected to the inlet of the exhaust fan (5) in sequence through the absorption / desorption heat exchanger 2 (4), the dehumidification wheel (3), the absorption / desorption heat exchanger 1 (2), and the fourth air valve (14); the above two routes are switched by controlling the opening and closing of the second air valve (12) and the fourth air valve (14); The air conditioning system is mainly composed of a compressor (8), a four-way valve (9), the first absorption / desorption heat exchanger (2), the second absorption / desorption heat exchanger (4), the third absorption / desorption heat exchanger (6), the fourth absorption / desorption heat exchanger (7), and a throttle valve (10). The exhaust port of the compressor (8) can be divided into two paths through the four-way valve (9): one path is connected in sequence to the fourth absorption / desorption heat exchanger (7), the third absorption / desorption heat exchanger (6), the throttle valve (10), the fourth absorption / desorption heat exchanger (7), and the throttle valve (10). The first path is connected to the absorption / desorption heat exchanger 1 (2) and the absorption / desorption heat exchanger 2 (4), and then connected to the suction pipe of the four-way valve (9); the other path is connected to the absorption / desorption heat exchanger 2 (4), the absorption / desorption heat exchanger 1 (2), the throttle valve (10), the absorption / desorption heat exchanger 3 (6), and the absorption / desorption heat exchanger 4 (7) in sequence, and then connected to the suction pipe of the four-way valve (9); the suction pipe of the four-way valve (9) is connected to the suction port of the compressor (8).

2. The periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system according to claim 1 is characterized by: The dehumidification system and the regeneration system can realize periodic switching by controlling the on and off of the four-way valve (9), the motor of the dehumidification wheel (3), and the opening and closing of the air valve 1 (11), the air valve 2 (12), the air valve 3 (13), and the air valve 4 (14): If the air valve 1 (11) and the air valve 2 (12) are opened, the air blower (1), the air valve 1 (11), the absorption / desorption type heat exchanger 1 (2), the lower half of the dehumidification wheel (3), and the absorption / desorption type heat exchanger 2 (4) constitute a dehumidification system, wherein the absorption / desorption type heat exchanger 1 (2) and the absorption / desorption type heat exchanger 2 (4) act as evaporators of the air conditioning system to cool and dehumidify the air, and the lower half of the dehumidification wheel (3) acts as the dehumidification area of ​​the dehumidification wheel (3) to dehumidify the air. Enthalpy dehumidification; the absorption / desorption heat exchanger four (7), the upper half of the dehumidification wheel (3), the absorption / desorption heat exchanger three (6), the air valve two (12), and the exhaust fan (5) constitute a regeneration system, and the absorption / desorption heat exchanger four (7) and the absorption / desorption heat exchanger three (6) act as the condenser of the air conditioning system to heat the air, thereby completing the regeneration process of the adsorbent in the absorption / desorption heat exchanger four (7), the upper half of the dehumidification wheel (3), and the absorption / desorption heat exchanger three (6); If the four-way valve (9) is powered on and the air valve three (13) and the air valve four (14) are opened, the air blower (1), the air valve three (13), the absorption / desorption type heat exchanger three (6), the upper half of the dehumidification wheel (3), and the absorption / desorption type heat exchanger four (7) constitute a dehumidification system. The absorption / desorption type heat exchanger three (6) and the absorption / desorption type heat exchanger four (7) act as evaporators of the air conditioning system to cool and dehumidify the air. The upper half of the dehumidification wheel (3) acts as the dehumidification zone of the dehumidification wheel (3) to cool and dehumidify the air. The air is dehumidified isenthalpically; the absorption / desorption heat exchanger 2 (4), the lower half of the dehumidification wheel (3), the absorption / desorption heat exchanger 1 (2), the air valve 4 (14), and the exhaust fan (5) constitute a regeneration system, and the absorption / desorption heat exchanger 2 (4) and the absorption / desorption heat exchanger 1 (2) act as the condenser of the air conditioning system to heat the air, thereby completing the regeneration process of the adsorbent in the absorption / desorption heat exchanger 2 (4), the lower half of the dehumidification wheel (3), and the absorption / desorption heat exchanger 1 (2).

3. The periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system according to claim 1 or 2, characterized in that: The absorption / desorption heat exchanger one (2), the absorption / desorption heat exchanger two (4), the absorption / desorption heat exchanger three (6) and the absorption / desorption heat exchanger four (7) are all fin-type heat exchangers with adsorbents coated on the surface, and the types of adsorbents include calcium chloride, lithium chloride, silica gel, and silica gel / halogen salt composite materials.

4. The periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system according to claim 1 or 2, characterized in that: The dehumidification wheel (3) has half a dehumidification zone and half a regeneration zone. Each time the motor is turned on and off, the dehumidification wheel (3) rotates half a circle, thereby achieving periodic switching between the dehumidification zone and the regeneration zone of the dehumidification wheel (3).

5. The periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system according to claim 1 or 2, characterized in that: The adsorbent in the dehumidification wheel (3) includes calcium chloride, lithium chloride, molecular sieve, activated carbon, silica gel, and silica gel / halogen salt composite material.

6. The periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system according to claim 1 or 2, characterized in that: The carrier material in the dehumidification wheel (3) includes glass fiber, ceramic fiber and asbestos fiber.

7. The periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system according to claim 1 or 2, characterized in that: The types of flow channels in the dehumidification wheel (3) include hexagonal, triangular, square, sinusoidal, and honeycomb.

8. The periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system according to claim 1 or 2, characterized in that: The types of compressors (8) include rotor type, scroll type and piston type.

9. The periodic adsorption-desorption type internal cooling and rotary wheel composite deep dehumidification system according to claim 1 or 2, characterized in that: The types of throttling valves (10) include capillary tubes, thermal expansion valves, and electronic expansion valves.

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