Dual-purpose compressed air supply system

Abstract

The utility model discloses a dual -purpose compressed gas supply system, including piston compressor, piston compressor is multistage pressure increasing structure still includes: be provided with nitrogen making mechanism among multistage pressure increasing structure, nitrogen making mechanism is configured as the pressure medium from the upper level of multistage pressure increasing structure obtains the nitrogen gas output to the next level structure, be provided with system filter at the air inlet of piston compressor, system filter is used for filtering air medium, and piston compressor is air piston compressor. Through the output of the first stage cylinder or the second stage cylinder, 0.8MPa pressure air is obtained, the system structure is simplified, and high-pressure nitrogen output can be realized by single machine, and switching between air and nitrogen can be implemented. In the system, the nitrogen after nitrogen making directly enters the next stage cylinder for continuous pressure increasing. Through the link integration of nitrogen making and high-pressure pressure increasing, the supporting facilities in the traditional system are greatly reduced, the system pressure loss is reduced, and the overall energy efficiency ratio is improved.

Description

Technical Field

[0001] This utility model relates to the field of compressed air supply, and in particular to a dual-purpose compressed air supply system. Background Technology

[0002] In existing compressed air supply systems, multi-stage reciprocating compressors are typically used only to provide high-pressure air. However, many industrial applications require both high-pressure air and high-pressure nitrogen, such as in chemical processing, blow molding, lithium battery electrolyte filling, pressure testing, laser cutting, cryogenic protection, and nitrogen sealing. Traditional equipment, when requiring high-pressure nitrogen, typically uses independent pressurization (e.g., screw pressurization), followed by pressurized nitrogen and then a high-pressure booster (e.g., a reciprocating compressor) to raise the medium to the required pressure.

[0003] This traditional approach involves independent pressurization and nitrogen generation equipment, which are separate from the high-pressure pressurization equipment. The process is lengthy and the system switching capability is poor. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the purpose of this utility model is to provide a dual-purpose compressed air supply system that can directly generate nitrogen inside a multi-stage pressurization structure and can switch between compressed air and compressed nitrogen, so as to achieve the purpose of simplifying the structure, reducing energy consumption and improving system integration.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A dual-purpose compressed air supply system includes a piston compressor, wherein the piston compressor has a multi-stage pressurization structure, and further includes: A nitrogen generating mechanism is provided between the multi-stage pressurization structures. The nitrogen generating mechanism is configured to obtain a pressure medium from the previous stage of the multi-stage pressurization structure and then output nitrogen to the next stage structure. A system filter is provided at the air inlet of the piston compressor. The system filter is used to filter the air medium. The piston compressor is an air piston compressor.

[0006] Furthermore, the nitrogen generating mechanism is composed of a first filter, a refrigerated dryer, a second filter, and a nitrogen generating module in sequence. The input medium of the first filter is the pressurized medium output from the low-pressure cylinder in the multi-stage pressurization structure.

[0007] Furthermore, the nitrogen generation module includes at least one pair of adsorption towers that operate in parallel with each other and a buffer tank disposed at the rear end of the adsorption towers.

[0008] Furthermore, a third filter is provided between the adsorption tower and the buffer tank.

[0009] Furthermore, the nitrogen generation module comprises at least one membrane assembly.

[0010] Furthermore, the multi-stage booster structure includes at least one pair of booster cylinders and a connecting pipeline connecting the pair of booster cylinders. The nitrogen generating mechanism is configured on the connecting pipeline via a reversing valve to enable the piston compressor to switch between nitrogen generating compression and air compression modes.

[0011] Furthermore, the boosting structure is a five-stage boosting structure, and the boosting cylinder includes a first-stage cylinder, a second-stage cylinder, a third-stage cylinder, a fourth-stage cylinder, a fifth-stage cylinder, and corresponding first-stage connecting pipes, second-stage connecting pipes, third-stage connecting pipes, fourth-stage connecting pipes, and output pipes for the output medium connected between the boosting cylinders.

[0012] Furthermore, the nitrogen generating mechanism is placed on the secondary connecting pipeline.

[0013] Furthermore, the output pressure of the piston compressor is one of 15 / 20 / 30 MPa.

[0014] The beneficial effects of this utility model are as follows: The present invention provides a dual-purpose compressed air supply system that obtains 0.8MPa pressurized air from the output of a primary or secondary cylinder. The system has a simplified structure and can achieve high-pressure nitrogen output with a single unit while switching between air and nitrogen. In this system, the nitrogen produced directly enters the next stage cylinder for further pressurization. By integrating nitrogen production and high-pressure pressurization, the supporting facilities in traditional systems are greatly reduced, system pressure loss is reduced, and the overall energy efficiency ratio is improved. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a system flowchart of this utility model. Detailed Implementation

[0017] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. The above description is for the purpose of simplifying the description of this utility model and does 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, it should not be construed as a limitation of this utility model.

[0018] Unless otherwise specified, the singular forms “a,” “the,” and “the” used in this specification include the plural forms. The terms “comprising,” “including,” and “containing” used in this specification indicate the presence of the claimed feature, but do not exclude the presence of one or more other features.

[0019] Exemplary embodiments of this application will now be described with reference to the accompanying drawings. However, it should be understood that this application can be presented in many different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments. Throughout the drawings, the same reference numerals denote the same or functionally identical elements.

[0020] Figure 1 The system flow diagram of this dual-purpose compression air supply system is shown. The multi-stage piston compressor 20 receives air through the inlet 10, directly drawing in air for compression. A system filter 11 is installed between the inlet 10 and the compression cylinders to quickly filter the medium before it is sequentially fed into the first-stage cylinder 21, second-stage cylinder 22, third-stage cylinder 23, fourth-stage cylinder 24, and fifth-stage cylinder 25. The first-stage cylinder 21, second-stage cylinder 22, third-stage cylinder 23, fourth-stage cylinder 24, and fifth-stage cylinder 25 are connected by connecting pipes. Specifically, this includes a primary connecting pipe 21a connecting the first-stage cylinder 21 and the second-stage cylinder 22; a secondary connecting pipe 22a connecting the second-stage cylinder 22 and the third-stage cylinder 23; a tertiary connecting pipe 23a connecting the third-stage cylinder 23 and the fourth-stage cylinder 24; and a quaternary connecting pipe 24a connecting the fourth-stage cylinder 24 and the fifth-stage cylinder 25. Finally, the fifth-stage cylinder 25 outputs the compressed medium through the output pipe 25a. A nitrogen generator 40 is configured on the connecting pipeline, inputting pressurized gas medium from the corresponding upstream compression cylinder and outputting nitrogen medium to the downstream compression cylinder. A reversing valve 29 is configured between the nitrogen generator 40 and the connecting pipeline, thereby enabling the multi-stage piston compressor 20 to switch between compressed nitrogen and compressed air output medium.

[0021] In some preferred embodiments, the multi-stage reciprocating compressor 20 outputs a compressed medium at 15 / 20 / 30 MPa through the exhaust port 30. Because the compression ratios of each cylinder in the multi-stage pressurization structure are different, in conventional designs, the later stages—specifically, the third-stage cylinder 23, fourth-stage cylinder 24, and fifth-stage cylinder 25—are typically high-pressure cylinders, with compression ratios higher than those of the low-pressure cylinders composed of the first-stage cylinder 21 and the second-stage cylinder 22. For example, under such output pressure requirements, the output pressure of the second-stage cylinder 22 is approximately 0.8 MPa. Therefore, the nitrogen generator 40 is configured in the secondary connection line 22a to meet its pressurized input requirements.

[0022] After the medium is input into the nitrogen generator 40, it passes through the first filter 41 to remove large particles of dust, rust, water droplets, and oil droplets. The refrigerated dryer 42 significantly lowers the dew point, causing water vapor to condense into water and be discharged. The second filter 43 removes the tiny oil mist and fine particles that remain after the refrigerated dryer before entering the nitrogen generator module 40a.

[0023] In some preferred embodiments, the nitrogen generation module 40a includes adsorption towers 44a and 44b connected in parallel, and a third filter 45 disposed after the adsorption towers 44a and 44b for removing dust particles. Since the adsorption towers 44a and 44b operate in an interactive manner, a buffer tank 46 is also disposed after the third filter 45 to collect the medium and return it to the connecting pipeline.

[0024] In some preferred embodiments, the nitrogen generation module 40a includes at least one membrane assembly 47 for nitrogen generation by selectively separating gases through a permeation membrane.

[0025] In some preferred embodiments, a nitrogen generation module 40a employing a permeation membrane method is configured on a secondary connection line 22a to improve generation efficiency through a higher-pressure input medium.

[0026] In some preferred embodiments, the connecting pipelines are equipped with a drain solenoid valve 28, a safety valve 26, and a pressure gauge.

[0027] In some preferred embodiments, a pressure transmitter 31, an analog signal acquisition unit 32, and a temperature transmitter 33 are configured on the output line 25a.

Claims

1. A dual-purpose compressed air supply system, comprising a piston compressor, wherein the piston compressor is a multi-stage pressurization structure, characterized in that, Also includes: A nitrogen generating mechanism is provided between the multi-stage pressurization structures. The nitrogen generating mechanism is configured to obtain pressure medium from the previous stage of the multi-stage pressurization structure and then output nitrogen to the next stage structure. A system filter is provided at the air inlet of the piston compressor. The system filter is used to filter the air medium. The piston compressor is an air piston compressor.

2. The dual-purpose compressed air supply system as described in claim 1, characterized in that, The nitrogen generating mechanism consists of a first filter, a refrigerated dryer, a second filter, and a nitrogen generating module in sequence. The input medium of the first filter is the pressurized medium output from the low-pressure cylinder in the multi-stage pressurization structure.

3. The dual-purpose compressed air supply system as described in claim 2, characterized in that, The nitrogen generation module includes at least one pair of adsorption towers that operate in parallel with each other and a buffer tank located at the rear end of the adsorption towers.

4. The dual-purpose compressed air supply system as described in claim 3, characterized in that, A third filter is provided between the adsorption tower and the buffer tank.

5. A dual-purpose compressed air supply system as described in claim 2, characterized in that, The nitrogen generation module comprises at least one membrane component.

6. The dual-purpose compressed air supply system as described in claim 2, characterized in that, The multi-stage booster structure includes at least one pair of booster cylinders and a connecting pipeline connecting the pair of booster cylinders. The nitrogen generating mechanism is configured on the connecting pipeline through a reversing valve to enable the piston compressor to switch between nitrogen generating compression and air compression modes.

7. A dual-purpose compressed air supply system as described in claim 6, characterized in that, The boosting structure is a five-stage boosting structure. The boosting cylinder includes a first-stage cylinder, a second-stage cylinder, a third-stage cylinder, a fourth-stage cylinder, and a fifth-stage cylinder, as well as corresponding first-stage connecting pipes, second-stage connecting pipes, third-stage connecting pipes, fourth-stage connecting pipes, and output pipes for the output medium connected between the boosting cylinders.

8. A dual-purpose compressed air supply system as described in claim 7, characterized in that, The nitrogen generating mechanism is placed on the secondary connecting pipeline.

9. A dual-purpose compressed air supply system as described in claim 7, characterized in that, The output pressure of the piston compressor is one of 15 / 20 / 30MPa.

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