Turbine type air compressor air path

Abstract

The utility model belongs to the technical field of air separation unit equipment, and relates to a turbine type air compressor air circuit which comprises a motor, the motor is connected to a speed increaser, the speed increaser is connected to a compressor, an outlet pipe is led out of the compressor and connected to an air supply pipeline, a pressure gauge is arranged on the outlet pipe, and an emptying valve A is arranged on the air supply pipeline. The two ends of the emptying valve A are connected with a parallel pipeline which is provided with an emptying valve B; the double valves with different inner diameters are arranged as the emptying valves to participate in anti-surge control of the compressor, so that the exhaust pressure of the compressor can be accurately controlled, and anti-surge protection can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of air separation unit equipment, and particularly relates to a gas path of a turbine air compressor. Background Art

[0002] Automatic control of the air release valve of the air compressor in the air separation unit supporting the steel mill. The air separation unit mainly adopts the deep refrigeration method, and utilizes the boiling point difference of each component in the air to realize rectification separation to produce oxygen, nitrogen, and argon to provide industrial gas for steel mill smelting. Among them, the air compressor is the main power source, which inhales air and isothermally compresses it to 0.45 - 0.5 MPa. The large air compressor is of centrifugal structure, and overpressure and surge are two abnormal operating conditions. Therefore, an air release valve is designed for the compressor.

[0003] In the industry, to prevent the air compressor from overpressuring or surging and causing equipment damage under abnormal conditions, an air release valve that can be quickly opened is usually configured to achieve the function of anti-surge protection. With the enlargement of machine equipment, the valve diameter increases. During normal regulation, it is not conducive to fine manual regulation at a small opening. Under abnormal conditions, the large valve opens quickly. Although it can protect the compressor, it causes the problem that the rectification process of the subsequent separation system is completely interrupted, which is not conducive to quickly resuming production.

[0004] Therefore, a gas path of a turbine air compressor is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a gas path of a turbine air compressor, which has the function of anti-surge protection for the compressor, and solves the problems in the prior art that the valve diameter increases, which is not conducive to fine manual regulation at a small opening, and the rapid opening of the large valve causes the rectification process of the subsequent separation system to be completely interrupted and is not conducive to quickly resuming production.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is that the utility model provides a gas path of a turbine air compressor, including a motor, the motor is connected to a speed increaser, the speed increaser is connected to a compressor, an outlet pipe is led out from the compressor and connected to a supply pipeline, a pressure gauge is arranged on the outlet pipe, an air release valve A is arranged on the supply pipeline, parallel pipelines are connected at both ends of the air release valve A, and an air release valve B is arranged on the parallel pipelines.

[0007] Preferably, a thermometer is arranged on the outlet pipe.

[0008] Preferably, a check valve and a supply valve are arranged at the front end of the supply pipeline.

[0009] Preferably, an air release silencer is arranged at the end of the supply pipeline.

[0010] Preferably, the diameter of the parallel pipeline is smaller than the diameter of the supply pipeline.

[0011] Preferably, the vent valve A and the vent valve B are solenoid valves, and the vent valve A and the vent valve B are electrically interlocked with the pressure gauge.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0013] 1. The present utility model sets a "double valve" with different inner diameters as the vent valve to participate in the anti-surge control of the compressor, so that the exhaust pressure of the compressor can be accurately controlled and anti-surge protection can be achieved.

[0014] 2. The present utility model has the function of anti-surge of the compressor, and solves the problems in the prior art that the valve diameter increases, which is not conducive to fine manual adjustment at small openings, the rapid opening of the large valve causes the complete interruption of the rectification process in the subsequent separation system, and is not conducive to the rapid resumption of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

[0016] Figure 1 It is a structural diagram of the gas path of a turbine air compressor.

[0017] In the above figures, 1. motor, 2. speed increaser, 3. compressor, 4. outlet pipe, 5. thermometer, 6. pressure gauge, 7. check valve, 8. supply valve, 9. electrical interlock, 10. vent silencer, 11. vent valve A, 12. vent valve B. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to better understand the above-mentioned objects, features and advantages of the present utility model, the following will further illustrate the present utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0019] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0020] Example 1, as Figure 1As shown in the figure, a gas path of a turbine air compressor includes a motor 1, the motor 1 is connected to a speed increaser 2, and the speed increaser 2 is connected to a compressor 3. The motor 1 is the entire power source. By driving the speed increaser 2, it transmits power to the compressor 3, responsible for providing stable power output to ensure the normal operation of the compressor 3. The speed increaser 2 is connected between the motor 1 and the compressor 3. Its main function is to increase the speed to meet the working requirements of the compressor 3. By increasing the speed, the speed increaser 2 can enable the compressor 3 to reach a higher operating speed and improve the air compression efficiency. The main task of the compressor 3 is to suck in and compress air to a specified pressure (0.45 - 0.5 MPa) to provide high-pressure air for the subsequent air separation process. The efficient compression function can ensure a stable and continuous gas supply.

[0021] An outlet pipe 4 is led out from the compressor 3 and connected to a gas supply pipeline. The outlet pipe 4 is connected to the outlet of the compressor 3, guiding the compressed air into the gas supply pipeline. The outlet pipe 4 provides a flow path for the high-pressure air and, in cooperation with other components, ensures the smooth and stable flow of the air current. A pressure gauge 6 is provided on the outlet pipe 4. The pressure gauge 6 is installed on the outlet pipe 4 and is used to monitor the air pressure at the outlet of the compressor 3 in real time. The reading of the pressure gauge 6 directly reflects the working state of the compressor 3, ensuring that the compressor 3 operates within the designed pressure range and preventing overpressure.

[0022] A vent valve A11 is provided on the gas supply pipeline. Both ends of the vent valve A11 are connected to parallel pipelines, and a vent valve B12 is provided on the parallel pipelines. The vent valve A11, as the main vent valve, is used to regulate pressure and participate in anti-surge control. The inner diameter of the vent valve A11 is relatively large, suitable for rapid venting of a large flow rate, which helps prevent overpressure or surge of the compressor 3. The vent valve B12 is in parallel with the vent valve A11 and serves as an auxiliary vent valve for more precise pressure control. The inner diameter of the vent valve B12 is relatively small, suitable for precise adjustment of a small flow rate, avoiding affecting the stability of the rectification process due to excessive venting volume.

[0023] The following specifically describes the specific designs of the above key components:

[0024] A thermometer 5 is provided on the outlet pipe 4. The thermometer 5 monitors the temperature of the air in the outlet pipe 4, ensuring that the system operates within a safe temperature range, providing real-time temperature data, which helps prevent overheating and protects the safety of the equipment.

[0025] A check valve 7 and a gas supply valve 8 are provided at the front end of the gas supply pipeline. The check valve 7 is installed at the front end of the gas supply pipeline to prevent gas backflow. The gas supply valve 8 controls the air flow rate in the gas supply pipeline and plays a role in opening and closing the gas path.

[0026] A muffler 10 is provided at the end of the air supply pipeline. The muffler 10 is installed at the end of the air supply pipeline and is mainly used to reduce the noise generated during venting, reduce noise pollution, and improve the working environment.

[0027] The diameter of the parallel pipeline is smaller than that of the air supply pipeline. The diameter of the parallel pipeline is designed to be smaller than that of the main air supply pipeline in order to refine the flow control. The parallel pipeline with a smaller diameter can achieve more precise pressure regulation.

[0028] The vent valves A 11 and B 12 are solenoid valves, and the vent valves A 11 and B 12 are electrically interlocked 9 with the pressure gauge 6. Using solenoid valves to control the vent valves A 11 and B can achieve fast opening and closing control through an automated system. At the same time, the vent valves A 11 and B 12 are electrically interlocked 9 with the pressure gauge 6, and can automatically adjust the opening and closing of the valves according to the real-time change of pressure to ensure that the compressor 3 operates within a safe pressure range.

[0029] The vent valves A 11 and B 12 are used in combination. They can not only perform rapid venting with a large opening to ensure safety, but also perform precise adjustment with a small opening to avoid interference with the downstream process.

[0030] Example 2: For a gas path of a turbine air compressor as shown in Example 1, a high-select control logic for the design of the vent valve is designed.

[0031] For the vent valve B 12, there are two control programs: manual and PID automatic. A high-select comparison is made between the two, and then the switch signal is transmitted to a gas path of a turbine air compressor 3 to participate in the execution.

[0032] First, when a small and precise adjustment by humans is required, the process personnel can input the valve opening and closing scale instruction in the manual setting program block.

[0033] Second, to maintain the stability of the air separation system operating conditions, a PID adjustment module is set. In the PID module, there are a pressure measurement value, a manually set pressure value, and an output value of the switch signal of the vent valve B 12. For example, the exhaust pressure is manually set to 0.5 MPa. During this period, the PID module automatically monitors the measurement data of the pressure gauge 6. When the monitored value is lower than 0.5 MPa, the valve opening continuously outputs 0%. When the monitored value reaches 0.51 MPa and starts to be higher than the set value, the valve opening starts to be output, and the vent valve B 12 is slowly opened to control the pressure gauge 6 to display within the set target range of 0.5 MPa.

[0034] Thirdly, for example, the manual setting module of the vent valve B12 outputs a valve opening of 5%. The PID automatic control module sets the pressure at 0.5 MPa. If the exhaust pressure of the compressor 3 rises to 0.51 MPa and shows a tendency to continue rising, at this time, the PID automatic control module monitors through the data acquisition of the pressure gauge 6 that the measured value is greater than the set value. The PID automatically outputs the valve opening. Starting from 0%, while comparing the measured pressure with the set pressure, the PID outputs the valve opening to control the exhaust pressure of the compressor 3 to remain at the set value of 0.5 MPa. If the valve opening output by the PID is below 5%, then the opening command of the vent valve B12 remains at an opening of 5% according to the manually set output command. If the valve opening output by the PID is greater than 5% and higher than the manually set valve opening, then the command of the vent valve B12 executes the valve opening value output by the PID automatic regulation model. At this time, the valve 12 is in the automatic control mode.

[0035] Under abnormal working conditions, the computer control system connected to the compressor 3 monitors that the exhaust pressure rises or fluctuates significantly. During this process, it is mainly monitored through the on-site pressure gauge 6. If the system pressure fluctuation triggers the surge interlock protection program, the computer control system issues an unloading command. At this time, the vent valves A11 and B12 are opened simultaneously to prioritize the safety of the compressor 3.

[0036] Under normal working conditions, the vent valve B12 participates in the precise adjustment of the exhaust pressure of the compressor 3. The valve opening can be output manually or the automatic control of the exhaust pressure can be set. In this way, the stability of the subsequent system pressure is ensured. It will not cause "overshoot" venting due to pressure fluctuations. Under abnormal conditions, both valves participate in venting to protect the compressor 3.

[0037] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, details are not described herein. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0038] The above are only the preferred embodiments of the present utility model, and it is not a limitation to the present utility model in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A gas path of a turbine air compressor, characterized in that, It includes a motor, the motor is connected to a speed increaser, the speed increaser is connected to a compressor, an outlet pipe is led out from the compressor and connected to a gas supply pipeline, a pressure gauge is arranged on the outlet pipe, a vent valve A is arranged on the gas supply pipeline, both ends of the vent valve A are connected to a parallel pipeline, and a vent valve B is arranged on the parallel pipeline.

2. The air circuit of a turbine air compressor according to claim 1, wherein A thermometer is arranged on the outlet pipe.

3. The air circuit of a turbine air compressor according to claim 1, characterized in that, A check valve and a gas supply valve are arranged at the front end of the gas supply pipeline.

4. The air circuit of a turbine air compressor according to claim 1, characterized in that, A vent silencer is arranged at the end of the gas supply pipeline.

5. A gas path of a turbine air compressor according to claim 1, characterized in that, The diameter of the parallel pipeline is smaller than that of the gas supply pipeline.

6. The air circuit of a turbine air compressor according to claim 1, characterized in that, The vent valve A and the vent valve B are solenoid valves, and the vent valve A and the vent valve B are electrically interlocked with the pressure gauge.

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