A drying assembly and air compressor for energy saving

Abstract

The utility model discloses a kind of drying assembly and air compressor for energy saving, including compression heat drying unit, heat exchange unit, gas holder and cold dryer. Through setting compression heat drying unit to dry compressed air in advance, reduce the moisture in compressed air, to reduce the latent heat in compressed air, then through the synergistic effect of heat exchange unit and cold dryer to reduce the temperature of compressed air into gas holder, to reduce the energy consumption when cold dryer works, so that the overall energy-saving effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, and in particular to a drying component and air compressor for energy saving. Background Technology

[0002] An air compressor, also known as an air compressor, is a device used to compress gases. Air compressors are similar in construction to water pumps. Most air compressors are reciprocating piston, rotary vane, or rotary screw types. The piston, vanes, or screw structures inside an air compressor that compress air are typically driven by an electric motor. Compressed air used in industrial applications requires drying. After air compressor processing, the air contains condensate. Untreated compressed air containing condensate can lead to corrosion failures in pneumatic equipment, deterioration of air-assisted process quality, and rust and corrosion of pipelines. Therefore, dryers are crucial for protecting users' production systems and processes. Traditional refrigerated or adsorption dryers consume large amounts of compressed air or electricity during the regeneration process, and the heat generated by the high-temperature compressed air during compressor operation is not effectively utilized. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a drying component for energy saving, which can effectively improve the overall energy utilization rate, thereby achieving energy-saving effects.

[0004] This utility model also proposes an air compressor having the above-mentioned drying components for energy saving.

[0005] A drying assembly for energy saving according to a first aspect of the present invention includes a compression heat drying unit, a heat exchange unit, an air storage tank, and a refrigerated dryer. The compression heat drying unit includes two adsorption towers and a four-way valve. The adsorption towers are filled with desiccant. The four-way valve includes a P1 port, a P2 port, a P3 port, and a P4 port. The P1 port of the four-way valve is an air inlet. The P2 and P3 ports are respectively connected to the air inlets of the two adsorption towers. The P4 port is a moisture exhaust port. The heat exchange unit is provided with a high-temperature air inlet channel and a low-temperature air inlet channel. The high-temperature air inlet channel is connected to the air outlets of the two adsorption towers through a solenoid valve, and the low-temperature air inlet channel is connected to the air outlet of the refrigerated dryer. The air inlet of the gas storage tank is connected to the high-temperature air outlet channel of the heat exchanger through a first connecting pipe, and the air outlet of the gas storage tank is connected to the air inlet of the refrigerated dryer through a second connecting pipe. The air outlet of the refrigerated dryer is connected to the low-temperature air inlet channel of the heat exchange unit through a third pipeline, and the low-temperature air inlet channel is connected to the dry compressed air outlet.

[0006] The energy-saving drying component according to the present invention has at least the following beneficial effects: by setting up a compression heat drying unit to dry the compressed air in advance, the moisture in the compressed air is reduced, thereby reducing the latent heat in the compressed air. Then, the temperature of the compressed air entering the air tank is reduced by the synergistic effect of the heat exchange unit and the refrigerated dryer, thereby reducing the energy consumption of the refrigerated dryer during operation, so that the overall energy-saving effect is achieved.

[0007] According to some embodiments of this utility model, the desiccant in the adsorption tower is alumina or molecular sieve.

[0008] According to some embodiments of this utility model, the heat exchange unit is a plate heat exchanger or a shell-and-tube heat exchanger, the high-temperature air inlet channel and the low-temperature air inlet channel are arranged in a counter-current manner, and the air outlet of the refrigerated dryer is connected to the low-temperature air inlet channel of the heat exchanger through a third connecting pipe.

[0009] According to some embodiments of the present invention, a first drain valve is connected to the bottom of the gas storage tank, and a second drain valve is connected to the bottom of the refrigerated dryer, and each drain valve is connected to a drain pipe.

[0010] An air compressor according to a second aspect of the present invention includes an air compressor main unit and the aforementioned drying component; The exhaust port of the air compressor main unit is connected to the P1 interface of the four-way valve.

[0011] According to some embodiments of this utility model, the main air compressor is a screw air compressor or a centrifugal air compressor.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the energy-saving drying component and air compressor according to an embodiment of the present invention.

[0014] 110. Adsorption tower A; 120. Adsorption tower B; 130. Four-way valve; 140. Solenoid valve; 200. Heat exchange unit; 210. High-temperature air inlet channel; 220. Low-temperature air inlet channel; 300. Air storage tank; 400. Refrigerated dryer; 510. First drain valve; 520. Second drain valve; 600. Air compressor body. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In the embodiments provided by this utility model, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0018] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0019] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also recognize that the embodiments described in the specification are optional embodiments, and the actions and modules involved are not necessarily essential to this invention.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] refer to Figure 1As shown, the energy-saving drying assembly according to an embodiment of the present invention includes a compression heat drying unit, a heat exchange unit 200, an air storage tank 300, and a refrigerated dryer 400. The compression heat drying unit includes two adsorption towers and a four-way valve 130. The adsorption towers are filled with desiccant. The four-way valve 130 includes a P1 port, a P2 port, a P3 port and a P4 port. The P1 port of the four-way valve 130 is an air inlet. The P2 port and the P3 port are respectively connected to the air inlets of the two adsorption towers. The P4 port is a moisture exhaust port. The heat exchange unit 200 is provided with a high-temperature air inlet channel 210 and a low-temperature air inlet channel 220. The high-temperature air inlet channel 210 is connected to the air outlets of the two adsorption towers through a solenoid valve 140, and the low-temperature air inlet channel 220 is connected to the air outlet of the refrigerated dryer 400. The air inlet of the air storage tank 300 is connected to the high-temperature air outlet channel of the heat exchanger through a first connecting pipe, and the air outlet of the air storage tank 300 is connected to the air inlet of the refrigerated dryer 400 through a second connecting pipe. The air outlet of the refrigerated dryer 400 is connected to the low-temperature air inlet channel 220 of the heat exchange unit 200 through a third pipeline, and the low-temperature air inlet channel 220 is connected to the dry compressed air outlet.

[0022] Specifically, the two adsorption towers are adsorption tower A110 and adsorption tower B120. Correspondingly, adsorption tower A110 is connected to the P2 interface, and adsorption tower B120 is connected to the P3 interface.

[0023] In actual use, the compressed air is dried in advance by setting up a compressed heat drying unit to reduce the moisture in the compressed air, thereby reducing the latent heat in the compressed air. Then, the temperature of the compressed air entering the air storage tank 300 is reduced by the synergistic effect of the heat exchange unit 200 and the refrigerated dryer 400, thereby reducing the energy consumption of the refrigerated dryer 400 during operation, so that the overall energy saving effect is achieved.

[0024] In some specific embodiments of this utility model, it may also have the following additional technical features: the desiccant in the adsorption tower is alumina or molecular sieve. Alumina desiccant has excellent mechanical strength and resistance to liquid water impact, making it particularly suitable for handling high-humidity compressed air; molecular sieves provide extremely low dew points, making them suitable for applications requiring extremely high dryness. Both of these desiccant materials can maintain good adsorption performance under compression heat regeneration conditions, ensuring the long-term stable operation of the system.

[0025] In some specific embodiments of this utility model, it may also have the following additional technical features: the heat exchange unit 200 is a plate heat exchanger or a shell-and-tube heat exchanger; the high-temperature air inlet channel 210 and the low-temperature air inlet channel 220 are arranged in a counter-current manner; and the outlet of the refrigerated dryer 400 is connected to the low-temperature air inlet channel 220 of the heat exchanger through a third connecting pipe. The counter-current arrangement can increase the heat transfer temperature difference and improve heat recovery efficiency, enabling sufficient heat exchange between the high-temperature dry air from the adsorption tower and the low-temperature dry air from the refrigerated dryer 400. The connection between the outlet of the refrigerated dryer 400 and the low-temperature air inlet channel 220 of the heat exchanger through a third connecting pipe ensures that the low-temperature air output by the refrigerated dryer 400 can fully absorb the heat from the high-temperature air, increasing the temperature of the final output air and effectively preventing condensation in the delivery pipeline.

[0026] In some specific embodiments of this utility model, it may also have the following additional technical features: a first drain valve 510 is connected to the bottom of the gas storage tank 300, and a second drain valve 520 is connected to the bottom of the refrigerated dryer 400; each drain valve is connected to a drain pipe. The first drain valve 510 is responsible for draining the condensed liquid water in the gas storage tank 300, while the second drain valve 520 is used to drain the condensate generated during the cooling process of the refrigerated dryer 400.

[0027] An air compressor according to an embodiment of the present utility model includes an air compressor main unit and the aforementioned drying component; The exhaust port of the air compressor main unit is connected to the P1 interface of the four-way valve 130.

[0028] In some specific embodiments of this utility model, it may also have the following additional technical features: the air compressor main unit is a screw air compressor or a centrifugal air compressor.

[0029] The specific work process is as follows: State 1: Adsorption tower A110 drying + Adsorption tower B120 regeneration Compression and distribution phase: High-temperature, high-pressure air (approximately 80-100℃) generated by the air compressor enters through port P1 of the four-way valve 130. At this time, the four-way valve 130 is in its first operating position, with P1 and P2 connected, and P3 and P4 connected. The compressed air enters the adsorption tower A110 through port P2.

[0030] Deep drying and energy recovery stage: In adsorption tower A110, compressed air flows through alumina or molecular sieve desiccant, where moisture is fully adsorbed, producing deeply dry air with a dew point below -40°C. This high-temperature dry air flows out from the outlet of adsorption tower A110 and, controlled by solenoid valve 140, most (approximately 85%) is introduced into the high-temperature inlet channel 210 of heat exchange unit 200, while a small portion (approximately 15%) enters the adsorption tower through the outlet of adsorption tower B120.

[0031] Simultaneously, the low-temperature dry air (approximately 2-10°C) flowing out from the outlet of the refrigerated dryer 400 enters the low-temperature air intake channel 220 of the heat exchange unit 200. The two airflows undergo efficient heat exchange in a counter-current heat exchanger: the temperature of the high-temperature dry air drops from approximately 80-100°C to approximately 40-50°C, while the temperature of the low-temperature dry air rises from approximately 2-10°C to approximately 30-40°C.

[0032] Condensation treatment and fine drying stage: The cooled, dry air enters the air storage tank 300, where residual moisture condenses and is periodically discharged through the first drain valve 510. The pretreated air then enters the refrigerated dryer 400 for deep cooling, further reducing the temperature to approximately 2-10°C, at which point the moisture in the air is essentially removed.

[0033] Regeneration and dehumidification stage: A small portion of the high-temperature, dry air enters the compressed air in adsorption tower B120. As it flows through the saturated desiccant, it carries away the adsorbed moisture, creating high-temperature, high-humidity air. This regenerated humid air is then discharged directly from the P4 exhaust port through the P3-P4 channel of the four-way valve 130, completing the regeneration process of adsorption tower B120.

[0034] Phase 2: Drying in adsorption tower B120 + regeneration in adsorption tower A110 When the system runs for a predetermined time or when the adsorption tower A110 is detected to be close to saturation, the four-way valve 130 and the solenoid valve 140 switch synchronously: The four-way valve 130 is rotated to the second working position, with P1 connected to P3 and P2 connected to P4; The solenoid valve 140 changes the airflow path accordingly, directing the outlet of adsorption tower B120 to heat exchange unit 200 and the outlet of adsorption tower A110. Most of the compressed air enters the adsorption tower B120 through P3 for drying; A small portion of the compressed air enters the adsorption tower A110 for regeneration after passing through solenoid valve 140, while the humid air is discharged from the P4 exhaust port.

[0035] Throughout the entire process, the two adsorption towers continuously alternate between drying and regeneration, ensuring an uninterrupted output of dry compressed air. By precisely controlling the airflow distribution ratio, both the processing capacity of the drying process and sufficient heat and purge air volume are guaranteed for the regeneration process. The dual function of the heat exchange unit 200 significantly improves system energy efficiency: it reduces the inlet temperature of the refrigerated dryer 400, decreasing its cooling load; and it increases the temperature of the final output air, effectively preventing condensation during transport.

[0036] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A drying assembly for energy saving, characterized in that, It includes a compression drying unit, a heat exchange unit (200), an air storage tank (300), and a refrigerated dryer (400); The compression heat drying unit includes two adsorption towers and a four-way valve (130). The adsorption towers are filled with desiccant. The four-way valve (130) includes a P1 port, a P2 port, a P3 port and a P4 port. The P1 port of the four-way valve (130) is an air inlet. The P2 port and the P3 port are respectively connected to the air inlets of the two adsorption towers. The P4 port is a moisture exhaust port. The heat exchange unit (200) is provided with a high-temperature air inlet channel (210) and a low-temperature air inlet channel (220). The high-temperature air inlet channel (210) is connected to the air outlets of the two adsorption towers through a solenoid valve (140), and the low-temperature air inlet channel (220) is connected to the air outlet of the refrigerated dryer (400). The air inlet of the air storage tank (300) is connected to the high-temperature air outlet channel of the heat exchanger through a first connecting pipe, and the air outlet of the air storage tank (300) is connected to the air inlet of the refrigerated dryer (400) through a second connecting pipe. The air outlet of the refrigerated dryer (400) is connected to the low-temperature air inlet channel (220) of the heat exchange unit (200) through a third pipeline, and the low-temperature air inlet channel (220) is connected to the dry compressed air outlet.

2. A drying assembly for energy saving as claimed in claim 1 wherein, The desiccant in the adsorption tower is alumina or molecular sieve.

3. A drying assembly for energy saving according to claim 1, characterized in that, The heat exchange unit (200) is a plate heat exchanger or a shell-and-tube heat exchanger. The high-temperature air inlet channel (210) and the low-temperature air inlet channel (220) are arranged in a counter-current manner. The air outlet of the refrigerated dryer (400) is connected to the low-temperature air inlet channel (220) of the heat exchanger through a third connecting pipe.

4. A drying assembly for energy saving according to claim 1, characterized in that, The bottom of the gas storage tank (300) is connected to a first drain valve (510), and the bottom of the refrigerated dryer (400) is connected to a second drain valve (520). Each drain valve is connected to a drain pipe.

5. An air compressor, characterized in that, Includes an air compressor main unit and a drying component as described in any one of claims 1-4; The exhaust port of the air compressor main unit is connected to the P1 interface of the four-way valve (130).

6. An air compressor according to claim 5, characterized in that, The main air compressor unit is a screw air compressor or a centrifugal air compressor.

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