Air compression and purification system

Abstract

The utility model relates to an air compression and purification system which comprises a frame structure, and an oilless air compressor, a refrigeration type compressed air drying machine, a high-pressure precision filter, an adsorption type compressed air drying machine, an air storage tank, an air supply valve, an activated carbon filter, a precision filter and an air distribution row which are connected in sequence, compressed air sequentially passes through the freezing type compressed air drying machine, the high-pressure precision filter and the adsorption type compressed air drying machine to be primarily purified, purified air enters the air storage tank to be stored, and after the air supply valve is opened, the air is purified again through the activated carbon filter and the precision filter. And the air is conveyed to the air distribution row through a pipeline to be supplied to follow-up air using equipment. The air compression and purification system is compact in structure, high in integration level, capable of achieving multi-stage purification and storage of compressed air and good in environmental adaptability and stability.

Description

Technical Field

[0001] This utility model relates to the field of compressed air preparation, and in particular to an air compression and purification system. Background Technology

[0002] In industrial production and special operations, compressed air is widely used as a power source and process gas in equipment drives, pneumatic control, and other scenarios. To ensure the safe and reliable operation of downstream equipment or personnel, compressed air typically undergoes purification treatment before actual use to remove impurities such as moisture, oil, and solid particles, ensuring the gas meets the high purity requirements of being "oil-free, water-free, and dust-free." Traditional compressed air systems usually consist of basic components such as air compressors, filters, and dryers, using multi-stage physical purification processes to remove oil, water vapor, and particulate matter to meet the air requirements of conventional industrial equipment. In shield tunneling with pressurized cutterhead replacement operations, compressed air can be used as a component of the mixed gas to prepare a high-pressure mixed gas suitable for human respiration. This places even more stringent technical requirements on the cleanliness, pressure stability, and continuous supply capacity of the compressed air.

[0003] However, most existing compressed air purification systems are simply combinations of individual purification devices, with fragmented layouts and manual configuration of modules. They lack integrated design and structural integration, making it difficult to meet the requirements of tunnel boring machine (TBM) construction environments characterized by limited space, inconvenient transportation, and short deployment cycles. Furthermore, during high-pressure air supply, conventional purification systems lack automatic pressure regulation and multi-stage redundant purification capabilities, increasing the risk of residual impurities in the compressed air and potentially contaminating and damaging the air mixing system and subsequent breathing apparatus. In addition, existing equipment structures generally lack earthquake and overturning resistance, which is detrimental to safe and stable operation in complex construction sites such as TBM sites. Therefore, there is an urgent need for a compact, highly efficient, and environmentally adaptable compressed air purification system to better serve the demanding conditions of pressurized TBM operations. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an air compression and purification system. This system has a compact structure and high integration, enabling multi-stage purification and storage of compressed air. It possesses good environmental adaptability and stability, and is particularly suitable for applications requiring high gas cleanliness and pressure stability, such as shield tunneling cutterhead replacement.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An air compression and purification system includes a frame structure and, in sequence, an oil-free air compressor, a refrigerated compressed air dryer, a high-pressure precision filter, an adsorption compressed air dryer, an air storage tank, an air supply valve, an activated carbon filter, a precision filter, and an air distributor. The oil-free air compressor, refrigerated compressed air dryer, high-pressure precision filter, adsorption compressed air dryer, activated carbon filter, and precision filter are all mounted on the frame structure. The oil-free air compressor compresses air, which undergoes preliminary purification by sequentially passing through the refrigerated compressed air dryer, high-pressure precision filter, and adsorption compressed air dryer. The purified air is then stored in the air storage tank. After the air supply valve is opened, the air undergoes further purification by passing through the activated carbon filter and precision filter, and is then transported through pipelines to the air distributor to supply subsequent air-consuming equipment.

[0007] Preferably, it also includes a digital display pressure controller, which is installed at the compressed air outlet of the oil-free air compressor for real-time pressure monitoring.

[0008] Preferably, the air tank is set to automatically stop the oil-free air compressor when the pressure reaches 2MPa and automatically start the oil-free air compressor when the pressure drops to 1.8MPa, ensuring that the pressure of the air tank is between 1.8 and 2.0MPa.

[0009] Preferably, three gas storage tanks are connected in parallel, and each gas storage tank has a volume of 1m³.

[0010] Preferably, two oil-free air compressors are used, one of which is a spare, and each oil-free air compressor has a power of 5.5KW.

[0011] Preferably, the right side of the frame structure is divided into upper and lower layers, with two oil-free air compressors respectively installed on the upper and lower layers.

[0012] Preferably, the adsorption-type compressed air dryer consists of two parallel high-pressure drying cylinders located on the left side of the frame structure, employing a dual-tower alternating adsorption and regeneration method to achieve deep drying.

[0013] Preferably, two pipelines are used to deliver air to the air distribution outlet, one of which is a spare.

[0014] Preferably, the frame structure adopts a modular frame with shock-absorbing and vibration-damping structure, which facilitates overall hoisting and movement.

[0015] Preferably, the subsequent gas supply equipment is a mixed gas distribution system for shield tunneling cutterhead replacement under pressure.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: The air compression and purification system provided by this utility model adopts an integrated structural design, installing an oil-free air compressor, a multi-stage dryer, and a multi-stage filter within a frame structure. The overall layout is compact and reasonable, facilitating hoisting and relocation. It is particularly suitable for locations with narrow working spaces and complex construction environments, such as shield tunnels, enabling rapid deployment and efficient operation. The system significantly improves the purity of compressed air through multi-stage purification paths, including refrigerated drying, high-pressure filtration, adsorption drying, activated carbon filtration, and precision filtration, meeting the requirements for high-quality air supply that is oil-free, water-free, and free of particulate impurities. Furthermore, by setting up two oil-free air compressors (one in use and one on standby) and three air storage tanks in parallel, it ensures a stable air supply while possessing good operational redundancy, improving overall reliability. In addition, the pipeline supplying air to the air distributor adopts a dual-pipe configuration (one in use and one on standby), effectively avoiding air supply interruptions due to pipeline blockage or leakage, ensuring the system's continuous operation under critical conditions. This system is particularly suitable for applications such as shield tunneling cutterhead replacement under pressure, which have strict requirements for compressed air pressure stability and gas cleanliness. It has excellent engineering adaptability and practical application value. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the air compression and purification system according to an embodiment of the present invention;

[0018] Figure 2 This is a connection diagram of the air compression and purification system according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1-Frame structure; 2-Oil-free air compressor; 3-Refrigerated compressed air dryer; 4-High-pressure precision filter; 5-Adsorption type compressed air dryer; 6-Air tank; 7-Air supply valve; 8-Activated carbon filter; 9-Precision filter; 10-Air distributor; 11-Digital display pressure controller. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model belong to the present utility model.

[0021] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0022] like Figure 1-2 As shown, this embodiment discloses an air compression and purification system, including a frame structure 1 and, in sequence, an oil-free air compressor 2, a refrigerated compressed air dryer 3, a high-pressure precision filter 4, an adsorption compressed air dryer 5, an air storage tank 6, an air supply valve 7, an activated carbon filter 8, a precision filter 9, and an air distributor 10. The frame structure 1 is a steel integrated support frame used to support and fix the main components of the entire system, possessing good strength and stability, suitable for use in vibration environments such as tunnel boring machine operations. The oil-free air compressor 2, the refrigerated compressed air dryer 3, the high-pressure precision filter 4, the adsorption compressed air dryer 5, the activated carbon filter 8, and the precision filter 9 are all installed on the frame structure 1. The components are compactly connected, facilitating hoisting and rapid on-site deployment, particularly suitable for the limited space of tunnel construction sites. The oil-free air compressor 2 is used to compress air, avoiding the impact of traditional oil-containing compressors on the cleanliness of the compressed gas. Compressed air undergoes preliminary purification sequentially through a refrigerated compressed air dryer 3, a high-pressure precision filter 4, and an adsorption-type compressed air dryer 5. The refrigerated compressed air dryer 3 removes moisture from the compression process, the high-pressure precision filter 4 filters particulate impurities, and the adsorption-type compressed air dryer 5 further adsorbs moisture and oil vapor to ensure gas dryness. The purified gas is then stored in a high-pressure storage tank 6, which provides pressure buffering and stabilization. After the air supply valve 7 is opened, the air is further purified through an activated carbon filter 8 and a precision filter 9. The activated carbon filter 8 adsorbs residual organic gases and odors, while the precision filter 9 further improves filtration accuracy. The purified air is then delivered to an air distributor 10 via pipeline to supply subsequent air-consuming equipment. The air distributor 10 distributes the purified compressed air to downstream equipment such as the mixed-gas distribution system. The pipeline system employs a two-pipeline configuration, one in use and one in standby, allowing switching to the backup pipeline in case of a main line failure, ensuring uninterrupted air supply and improving overall system stability and reliability.

[0023] Furthermore, the air compression and purification system also includes a digital display pressure controller 11. The digital display pressure controller 11 is installed at the compressed air outlet of the oil-free air compressor 2 for real-time pressure monitoring. The digital display pressure controller 11 has a digital display screen and an electronic sensing module, which can intuitively display the compressed air outlet pressure, facilitating on-site personnel to monitor the operating status and adjust system parameters in a timely manner. The air tank 6 is set to automatically stop the oil-free air compressor 2 when the pressure reaches 2MPa and automatically start it when the pressure drops to 1.8MPa, ensuring that the pressure in the air tank 6 is between 1.8 and 2.0MPa. Through pressure linkage control logic, automatic start-stop linkage between the compressor and the air tank is achieved, eliminating the need for frequent manual intervention and helping to improve the system's automation level. In addition, three air tanks 6 are connected in parallel, each with a volume of 1m³. The parallel arrangement of the three air tanks provides greater buffer space and pressure redundancy, improving air supply stability and meeting energy storage needs under high air consumption conditions.

[0024] In this embodiment, two oil-free air compressors 2 are used, one of which is a backup. Each oil-free air compressor has a power of 5.5KW. The configuration of two compressors improves system reliability. If one compressor fails or needs maintenance, the backup compressor can seamlessly take over to ensure continuous air supply. The right side of the frame structure 1 is divided into upper and lower layers. The two oil-free air compressors 2 are respectively installed on the upper and lower layers. This vertical layered structure design achieves a compact arrangement of equipment within a limited footprint, which is particularly suitable for space-constrained locations such as tunnel boring machine areas. It effectively saves installation area and facilitates the pipeline layout and independent maintenance of the upper and lower air compressors.

[0025] Furthermore, the adsorption-type compressed air dryer 5 consists of two parallel high-pressure drying cylinders located on the left side of the frame structure 1. It employs a dual-tower alternating adsorption and regeneration method to achieve deep drying. The two cylinders operate alternately; while one cylinder adsorbs moisture, the other regenerates, ensuring continuous and efficient system operation, effectively reducing the dew point of the compressed air, and meeting the requirements for high-cleanliness, dry air. Two pipelines supplying the air to the air distributor 10 are used, one of which is a backup. The two pipelines can be switched according to operating conditions. When one pipeline is under maintenance or malfunctions, the other can be immediately activated, avoiding air supply interruptions and improving system stability and emergency response capabilities.

[0026] Frame structure 1 adopts a modular frame with shock-absorbing and vibration-damping features, facilitating overall hoisting and relocation. The modular design enhances the equipment's overall integrity and facilitates rapid deployment, making it particularly suitable for the confined spaces and frequent construction transitions in shield tunneling environments. The shock-absorbing and vibration-damping structure improves the equipment's operational stability and durability under complex working conditions. The subsequent air supply equipment is a mixed gas distribution system for pressurized cutterhead replacement in shield tunneling. The air compression and purification system, as the front-end gas source module of this mixed gas system, directly affects the accuracy of the mixed gas ratio and the safety of the breathing environment for workers.

[0027] In summary, this utility model discloses an air compression and purification system. The system includes a frame structure 1 and, in sequence, an oil-free air compressor 2, a refrigerated compressed air dryer 3, a high-pressure precision filter 4, an adsorption-type compressed air dryer 5, an air storage tank 6, an air supply valve 7, an activated carbon filter 8, a precision filter 9, and an air distributor 10. A digital display pressure controller 11 enables real-time monitoring of the system's air pressure. The system's continuous and safe air supply is ensured through dual-line air supply pipelines, a standby oil-free air compressor, and parallel air storage tanks. This air compression and purification system has a compact integrated structure, installed within a modular frame structure, facilitating overall hoisting and rapid deployment, and is suitable for applications with limited construction space, such as shield tunnels. The system employs a multi-stage purification unit combined purification strategy, resulting in excellent compressed air purification. It can output clean, dry, and stable high-quality compressed air, meeting the high-standard air requirements of downstream applications, and is particularly suitable for shield tunneling operations with extremely high requirements for air cleanliness and pressure stability. The implementation of this system has effectively improved the reliability of gas supply and operational efficiency in pressurized operations. It has significant industry promotion value and engineering application significance for promoting the standardization and integration of equipment in high-pressure gas environments such as tunnel engineering and underground construction.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An air compression and purification system, characterized in that, The system includes a frame structure (1) and, in sequence, an oil-free air compressor (2), a refrigerated compressed air dryer (3), a high-pressure precision filter (4), an adsorption compressed air dryer (5), an air storage tank (6), an air supply valve (7), an activated carbon filter (8), a precision filter (9), and an air distributor (10). The oil-free air compressor (2), the refrigerated compressed air dryer (3), the high-pressure precision filter (4), the adsorption compressed air dryer (5), the activated carbon filter (8), and the precision filter (9) are all installed on the frame structure (1). The oil-free air compressor (2) is used to compress air. The compressed air passes through the refrigerated compressed air dryer (3), the high-pressure precision filter (4), and the adsorption compressed air dryer (5) for preliminary purification. The purified gas enters the air storage tank (6) for storage. After the air supply valve (7) is opened, the air passes through the activated carbon filter (8) and the precision filter (9) for further purification and is then transported to the air distributor (10) through pipelines to supply subsequent air-consuming equipment.

2. The air compression purification system of claim 1, wherein, It also includes a digital pressure controller (11), which is installed at the compressed air outlet of the oil-free air compressor (2) for real-time pressure monitoring.

3. The air compression purification system of claim 1, wherein, The air tank (6) is set to automatically stop the oil-free air compressor (2) when the pressure reaches 2MPa and automatically start the oil-free air compressor (2) when the pressure drops to 1.8MPa, so as to ensure that the pressure of the air tank (6) is between 1.8-2.0MPa.

4. The air compression purification system of claim 3, wherein, The gas storage tanks (6) are arranged in parallel in three units, each with a volume of 1m³.

5. The air compression purification system of claim 1, wherein, Two oil-free air compressors (2) are used, one of which is a spare. The power of each oil-free air compressor is 5.5KW.

6. The air compression purification system of claim 5, wherein, The right side of the frame structure (1) is divided into upper and lower layers, with two oil-free air compressors installed on the upper and lower layers respectively.

7. The air compression purification system of claim 6, wherein, The adsorption-type compressed air dryer (5) consists of two parallel high-pressure drying cylinders located on the left side of the frame structure (1), and uses a dual-tower alternating adsorption and regeneration method to achieve deep drying.

8. The air compression purification system of claim 1, wherein, Two pipelines are used to deliver air to the air distribution outlet (10), one of which is a spare.

9. The air compression purification system of claim 1, wherein, The frame structure (1) adopts a modular frame with shock-absorbing and vibration-damping structure, which facilitates overall hoisting and movement.

10. The air compression and purification system according to claim 1, characterized in that, The subsequent gas-using equipment is a mixed gas distribution system for pressurized cutterhead replacement in tunnel boring machines.

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