Compressed gas grading pressurization system based on bypass pressure regulation and control

Abstract

The utility model provides a compressed gas staged pressurization system based on bypass pressure regulation and control, and relates to the technical field of compressed gas pressurization. The compressed gas grading pressurization system comprises a supercharger, a buffer tank, a first pressure detection unit, a second pressure detection unit, a bypass control valve, a main path control valve and a control unit, and the supercharger communicates with an external gas source inlet and is in communication connection with the control unit; the buffer tank is communicated with the supercharger through a main path, and the buffer tank is communicated with an external air source inlet through a bypass; the first pressure detection unit is arranged at an external air source inlet and is in communication connection with the control unit; the second pressure detection unit is arranged on the buffer tank and is in communication connection with the control unit; the main path control valve is arranged on the main path and is in communication connection with the control unit; the bypass control valve is arranged on the bypass and is in communication connection with the control unit. According to the scheme, the operation pressure of the supercharger can be relieved, energy is saved, and meanwhile the service life of the supercharger can be prolonged.

Description

Technical Field

[0001] This application relates to the field of compressed gas boosting technology, and more specifically, to a compressed gas staged boosting system based on bypass pressure regulation. Background Technology

[0002] Compressed gas boosting is a common method in industries such as manufacturing and petrochemicals. Traditional gas boosting systems typically use a booster compressor for continuous pressurization, resulting in high energy consumption and frequent equipment start-ups and shutdowns. While existing technologies include solutions that stabilize pressure using a post-boost buffer tank, the boosting efficiency is limited, and the low pressure in the buffer tank and at very low outlet pressures put significant strain on the booster compressor and its motor. Furthermore, the low-pressure phase increases the booster compressor's energy consumption. Utility Model Content

[0003] The purpose of this application is to provide a staged pressurization system for compressed gas based on bypass pressure regulation. By adding a bypass control scheme, when the pressure in the buffer tank is relatively low, the gas enters the buffer tank through the bypass without starting the booster. After the pressure in the buffer tank reaches the set value, the gas is then pressurized through the main line where the booster is located and input into the buffer tank, which relieves the operating pressure of the booster (reduces the start-up frequency), saves energy, and can extend the service life of the booster.

[0004] To achieve the above objectives, the embodiments of this application are implemented in the following manner:

[0005] In a first aspect, embodiments of this application provide a staged pressurization system for compressed gas based on bypass pressure regulation, comprising: a booster compressor, a buffer tank, a first pressure detection unit, a second pressure detection unit, a bypass control valve, a main control valve, and a control unit. The booster compressor is connected to an external gas source inlet and is communicatively connected to the control unit. The buffer tank is connected to the booster compressor via the main line and to an external gas source inlet via a bypass. The first pressure detection unit is disposed at the external gas source inlet and is communicatively connected to the control unit. The second pressure detection unit is disposed on the buffer tank and is communicatively connected to the control unit. The main control valve is disposed on the main line and is communicatively connected to the control unit. The bypass control valve is disposed on the bypass line and is communicatively connected to the control unit.

[0006] In conjunction with the first aspect, in a first possible implementation of the first aspect, the compressed gas staged pressurization system further includes a check valve disposed between the bypass control valve and the buffer tank.

[0007] In conjunction with the first aspect, in a second possible implementation of the first aspect, the compressed gas staged pressurization system further includes a safety valve disposed on the buffer tank.

[0008] In conjunction with the first aspect, in a third possible implementation of the first aspect, the compressed gas staged pressurization system further includes a pressure gauge disposed on the buffer tank.

[0009] Beneficial effects:

[0010] The compressed gas staged booster system based on bypass pressure regulation includes a booster compressor, a buffer tank, a first pressure detection unit, a second pressure detection unit, a bypass control valve, a main control valve, and a control unit. The booster compressor is connected to an external gas source inlet and communicates with the control unit. The buffer tank is connected to the booster compressor via the main line and also to an external gas source inlet via a bypass. This provides the buffer tank with two gas intake routes: a main line and a bypass line. The first pressure detection unit is located at the external gas source inlet and communicates with the control unit; the second pressure detection unit is located on the buffer tank and communicates with the control unit; the main control valve is located on the main line and communicates with the control unit; and the bypass control valve is located on the bypass line and communicates with the control unit. Accordingly, the first pressure detection unit can detect the pressure of the external air source, while the second pressure detection unit can detect the pressure of the buffer tank (the pressure inside the buffer tank can also be considered the location where the main line and bypass converge). These readings are sent to the control unit, which then determines whether to use the bypass (closing the main line and not starting the booster) or the main line (closing the bypass and starting the booster) based on the external air source pressure and the buffer tank pressure. The control unit generates corresponding control commands to control the main line control valve (and the booster's start / stop) and the bypass control valve. This allows for bypass air intake (closing the main line and not starting the booster) when the buffer tank pressure is lower than the set value (determined based on the external air source pressure). The pressure gradually increases in the buffer tank until the set value is reached, at which point the bypass is closed, the main line is activated, and the booster is started for air intake. This alleviates the operating pressure on the booster, saves energy, and extends the booster's service life.

[0011] A check valve is installed between the bypass control valve and the buffer tank to prevent gas backflow. A safety valve is installed on the buffer tank to ensure its safety. A pressure gauge is installed on the buffer tank for easy monitoring by inspection personnel.

[0012] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of a staged pressurization system for compressed gas based on bypass pressure regulation, provided in an embodiment of this application, from a first-view perspective.

[0015] Figure 2 This is a schematic diagram of a staged pressurization system for compressed gas based on bypass pressure regulation, provided in an embodiment of this application, from a second perspective.

[0016] Figure 3 The control flow diagram of the staged pressurization system for compressed gas based on bypass pressure regulation provided in the embodiments of this application is shown.

[0017] Icons: 1-Booster; 2-Buffer tank; 3-Pressure gauge; 4-Safety valve; 5-First pressure detection unit; 6-Second pressure detection unit; 7-Bypass control valve; 8-Main control valve; 9-Check valve; 10-Control unit. Detailed Implementation

[0018] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0019] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for 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 application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] It should also be noted that, unless otherwise explicitly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] Please see Figure 1 , Figure 2 and Figure 3A staged pressurization system for compressed gas based on bypass pressure regulation may include: a booster 1, a buffer tank 2, a first pressure detection unit 5, a second pressure detection unit 6, a bypass control valve 7, a main control valve 8, and a control unit 10 (control unit 10 is not included in the main control unit). Figure 1 and Figure 2 As shown in the image, it resembles an embedded terminal.

[0022] In this embodiment, the booster compressor 1 is connected to an external air source inlet and is communicatively connected to the control unit 10. The buffer tank 2 is connected to the booster compressor 1 via a main line (an air supply line), and the buffer tank 2 can also be connected to an external air source inlet via a bypass line (another air supply line).

[0023] The first pressure detection unit 5 can be installed at the external air source inlet and communicate with the control unit 10. The second pressure detection unit 6 can be installed on the buffer tank 2 (at any available location on the buffer tank 2, or on the pipeline between the junction of the main line and the bypass line and the buffer tank 2) and communicate with the control unit 10. The main line control valve 8 is installed on the main line and communicates with the control unit 10; while the bypass control valve 7 is installed on the bypass line and communicates with the control unit 10.

[0024] Accordingly, the first pressure detection unit 5 can detect the pressure of the external air source, while the second pressure detection unit 6 can detect the pressure of the buffer tank 2 (the pressure inside the buffer tank 2 can also be considered the position where the main line and bypass converge). These detections are sent to the control unit 10. The control unit 10 then determines, based on the pressure of the external air source and the pressure of the buffer tank 2, whether to use the bypass (closing the main line and not starting the booster 1) or use the main line (closing the bypass and starting the booster 1). It then generates corresponding control commands to control the main line control valve 8 (and the start / stop of the booster 1) and the bypass control valve 7. This allows the bypass to be used when the pressure in the buffer tank 2 is lower than the set value (a value determined based on the pressure of the external air source). By gradually increasing the pressure in the buffer tank 2 to the set value, the bypass is then closed, the main line is activated, and the booster 1 is started for air intake. This alleviates the operating pressure on the booster 1, saves energy, and extends the service life of the booster 1.

[0025] For example, if the compressed gas pressure from an external gas source is 0.9 MPa (detected by the first pressure detection unit 5 and sent to the control unit 10), the booster compressor 1 can pressurize it to 2.5 MPa. Initially, the control unit 10 will activate the bypass pressure control system, allowing the compressed gas to enter the booster buffer tank 2 via the bypass until it reaches 0.88 MPa (this is a set value and can be adjusted according to the actual system conditions). During this process, the booster compressor 1 does not need to run; the bypass control valve 7 is open, and the main control valve 8 is closed. When the pressure in the buffer tank 2 (detected by the second pressure detection unit 6 and sent to the control unit 10) gradually increases to 0.88 MPa, the bypass control valve 7 is closed, the main control valve 8 is opened, and the booster compressor 1 is started, pressurizing the buffer tank 2 to 2.5 MPa. This reduces the operating time of the booster compressor 1, extends its lifespan, and lowers energy consumption.

[0026] To prevent gas backflow, the compressed gas staged pressurization system also includes a check valve 9, which is located between the bypass control valve 7 and the buffer tank 2.

[0027] To ensure the safety of the buffer tank 2, the compressed gas staged pressurization system also includes a safety valve 4, which is installed on the buffer tank 2 (e.g., at the top).

[0028] To facilitate inspection personnel in checking the pressure of buffer tank 2 during inspections, the compressed gas staged pressurization system also includes a pressure gauge 3, which is installed on buffer tank 2.

[0029] In summary, this embodiment provides a staged pressurization system for compressed gas based on bypass pressure regulation, including a booster compressor 1, a buffer tank 2, a first pressure detection unit 5, a second pressure detection unit 6, a bypass control valve 7, a main control valve 8, and a control unit 10. The booster compressor 1 is connected to an external gas source inlet and is communicatively connected to the control unit 10. The buffer tank 2 is connected to the booster compressor 1 via the main line and also to an external gas source inlet via a bypass. Thus, the buffer tank 2 has two gas intake routes: a main line and a bypass line. The first pressure detection unit 5 is located at the external gas source inlet and is communicatively connected to the control unit 10; the second pressure detection unit 6 is located on the buffer tank 2 and is communicatively connected to the control unit 10; the main control valve 8 is located on the main line and is communicatively connected to the control unit 10; and the bypass control valve 7 is located on the bypass line and is communicatively connected to the control unit 10. Accordingly, the first pressure detection unit 5 can detect the pressure of the external air source, while the second pressure detection unit 6 can detect the pressure of the buffer tank 2 (the pressure inside the buffer tank 2 can also be considered the position where the main line and bypass converge). These detections are sent to the control unit 10. The control unit 10 then determines, based on the pressure of the external air source and the pressure of the buffer tank 2, whether to use the bypass (closing the main line and not starting the booster 1) or use the main line (closing the bypass and starting the booster 1). It then generates corresponding control commands to control the main line control valve 8 (and the start / stop of the booster 1) and the bypass control valve 7. This allows the bypass to be used when the pressure in the buffer tank 2 is lower than the set value (a value determined based on the pressure of the external air source). By gradually increasing the pressure in the buffer tank 2 to the set value, the bypass is then closed, the main line is activated, and the booster 1 is started for air intake. This alleviates the operating pressure on the booster 1, saves energy, and extends the service life of the booster 1.

[0030] Check valve 9 is installed between bypass control valve 7 and buffer tank 2 to prevent gas backflow. Safety valve 4 is installed on buffer tank 2 to ensure its safety. Pressure gauge 3 is installed on buffer tank 2 for easy inspection by maintenance personnel.

[0031] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A staged pressurization system for compressed gas based on bypass pressure regulation, characterized in that, include: The components include a booster compressor, a buffer tank, a first pressure detection unit, a second pressure detection unit, a bypass control valve, a main control valve, and a control unit. The booster compressor is connected to an external air source inlet and is communicatively connected to the control unit; The buffer tank is connected to the booster compressor via the main line, and the buffer tank is connected to an external air source inlet via a bypass. The first pressure detection unit is located at the external air source inlet and is communicatively connected to the control unit; The second pressure detection unit is mounted on the buffer tank and is communicatively connected to the control unit; The main control valve is installed on the main line and is communicatively connected to the control unit; The bypass control valve is located on the bypass and is communicatively connected to the control unit.

2. The staged pressurization system for compressed gas based on bypass pressure regulation according to claim 1, characterized in that, The compressed gas staged pressurization system also includes a check valve. The check valve is located between the bypass control valve and the buffer tank.

3. The staged pressurization system for compressed gas based on bypass pressure regulation according to claim 1, characterized in that, The compressed gas staged pressurization system also includes a safety valve. The safety valve is installed on the buffer tank.

4. The staged pressurization system for compressed gas based on bypass pressure regulation according to claim 1, characterized in that, The compressed gas staged pressurization system also includes a pressure gauge. The pressure gauge is mounted on the buffer tank.

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