Generator hydrogen system hydrogen full parameter integrated online monitoring system

Abstract

The generator hydrogen system hydrogen full parameter integrated online monitoring system includes a cabinet, and the cabinet is provided with a line terminal plate, a high pressure area monitoring pipeline, a low pressure area monitoring pipeline, a high point monitoring pipeline, a low point monitoring pipeline, an emptying pipeline and a hydrogen replenishing pipeline; the line terminal plate is provided with a power supply interface, a hydrogen leak detection signal output interface, a hydrogen leak detection probe input interface, a hydrogen pressure high alarm interface, a hydrogen pressure low alarm interface, a hydrogen pressure too low alarm interface, a generator internal air pressure monitoring interface, a hydrogen humidity signal interface, a hydrogen purity signal interface, a hydrogen oxygen signal interface and a differential pressure signal interface. The present invention has comprehensive monitoring parameters, a high degree of equipment integration, equipment updating, convenient maintenance, sufficient monitoring, simple and easy system operation and maintenance, and is conducive to fault analysis and processing and centralized control systems.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen online monitoring in gas turbine power plants, and specifically relates to an integrated online monitoring system for all hydrogen parameters of a gas generator hydrogen system, which realizes highly integrated online monitoring of all hydrogen parameters (including hydrogen purity, humidity, oxygen in hydrogen, hydrogen leakage, pressure, pressure switch alarm, differential pressure, hydrogen replenishment flow, etc.). Background Art

[0002] The monitoring of hydrogen in generators is of great significance to ensure the safe, stable and economical operation of generators. The 2014 edition of the "Twenty-five Countermeasures to Prevent Power Production Accidents" and other relevant standards have put forward clear requirements for online monitoring of hydrogen in generators. Especially after the "3.13" hydrogen explosion accident at Huaneng Beijing Thermal Power Plant in 2015, various power generation groups and power plants have paid more attention to the safety of hydrogen cooling systems in generators.

[0003] The hydrogen online monitoring systems for gas turbine generators installed in some power plants currently have the following problems:

[0004] Hydrogen parameter monitoring is scattered. The current system's hydrogen leakage monitoring is at the 6.9-meter layer, and other parameters are at the 0-meter layer, with a low degree of integration.

[0005] The main instruments are aging and outdated, making daily maintenance inconvenient. The main instruments of the system are aging, and the measurement accuracy and reliability have seriously declined. The equipment has been in operation for ten years, and the main measuring components are aging. In addition, due to domestic monitoring requirements, this type of product has developed and replaced very quickly, and the original equipment has been basically eliminated, making it difficult to maintain in the later stage. The monitoring instruments for other parts currently have a small market inventory and expensive spare parts. There are also other instruments such as dew point meters, which have declined in product quality, reduced measurement accuracy, and often fail to meet the standards when sent for inspection. The hydrogen flowmeter does not accurately measure the hydrogen replenishment flow. Therefore, accuracy and reliability are difficult to guarantee, and it is impossible to ensure the safe and efficient operation of the generator set.

[0006] Insufficient monitoring and potential safety hazards. According to the new countermeasures and technical specifications, it is necessary to increase hydrogen leakage monitoring in the hydrogen cooler, oil tank and other areas of the unit, and add a micro-oxygen meter to avoid hydrogen leakage and explosion of the unit and strengthen hydrogen quality supervision. In addition, due to early design reasons, the original system pipelines are complex, and the aging of equipment reduces the sealing of the pipelines and increases the leakage rate of the pipeline system, which brings hydrogen safety hazards.

[0007] The system operation and maintenance are complex. The monitoring system process pipelines are crisscrossed, the operation is complicated and cumbersome, and it is not conducive to operation and maintenance.

[0008] The system has no data record and curve retention. The current system only transmits part of the data to the unit DCS, and the data retention and query are extremely unchanged. The new system sets up a data output interface and transmits it to the chemical centralized control system, which is convenient for the retention and query of historical data. It can provide data curves and records for instrument failures and unit hydrogen replenishment, leakage, pressure fluctuations, etc., which is conducive to fault analysis and processing. Summary of the invention

[0009] In order to solve the deficiencies in the prior art, the present invention provides an integrated online monitoring system for all parameters of hydrogen in a generator hydrogen system, which is easy to operate, has accurate monitoring values, and is safe and reliable.

[0010] In order to solve the above technical problems, the present invention adopts the following technical scheme: a generator hydrogen system hydrogen full parameter integrated online monitoring system, including a cabinet, the cabinet body is provided with a generator fan high-pressure flange interface, a generator fan low-pressure port flange interface, a generator internal high point flange interface, a generator internal low point flange interface, a tail gas exhaust flange interface, a hydrogen supply inlet flange interface and a hydrogen supply outlet flange interface, and a line terminal plate, a high-pressure area monitoring pipeline, a low-pressure area monitoring pipeline, a high-point monitoring pipeline, a low-point monitoring pipeline, an exhaust pipeline and a hydrogen supply pipeline are provided in the cabinet; the high-pressure area monitoring pipeline is connected to the generator fan high-pressure flange interface, the low-pressure area monitoring pipeline is connected to the generator fan low-pressure port flange interface, the high-point monitoring pipeline is connected to the generator internal high-point flange interface, the low-point monitoring pipeline is connected to the generator internal low-point flange interface, the exhaust pipeline is connected to the exhaust exhaust flange interface, and the two ports of the hydrogen supply pipeline are respectively connected to the hydrogen supply inlet flange interface and the hydrogen supply outlet flange interface;

[0011] The line terminal panel is provided with a power supply interface, a hydrogen leak detection signal output interface, a hydrogen leak detection probe input interface, a hydrogen pressure high alarm interface, a hydrogen pressure low alarm interface, a hydrogen pressure too low alarm interface, a generator internal air pressure monitoring interface, a hydrogen humidity signal interface, a hydrogen purity signal interface, an oxygen in hydrogen signal interface and a differential pressure signal interface.

[0012] A mass flow meter is provided on the hydrogen replenishment pipeline, and the mass flow meter is connected to a flow display.

[0013] A differential pressure transmitter, a differential pressure gauge and a first normally closed valve are connected in parallel between the high-pressure area monitoring pipeline and the low-pressure area monitoring pipeline; the differential pressure transmitter is connected to the line terminal board through a signal line;

[0014] A first normally open valve and a second normally open valve are provided on the high-pressure area monitoring pipeline, and the distance between the first normally open valve and the high-pressure flange interface of the generator fan is smaller than the distance between the second normally open valve and the high-pressure flange interface of the generator fan;

[0015] The low-pressure area monitoring pipeline is provided with a third normally open valve, a fourth normally open valve and a fifth normally open valve whose distances from the low-pressure port flange interface of the generator fan increase in sequence;

[0016] The differential pressure transmitter is located between the second normally open valve and the fifth normally open valve, the connection points of the differential pressure gauge and the first normally closed valve and the high-pressure area monitoring pipeline are all located between the first normally open valve and the second normally open valve, and the connection points of the differential pressure gauge and the first normally closed valve and the low-pressure area monitoring pipeline are all located between the fourth normally open valve and the fifth normally open valve.

[0017] One end of the exhaust pipe is connected to the exhaust flange interface, one end of the low point monitoring pipe is connected to the internal low point flange interface of the generator, and the other end of the exhaust pipe is connected to the other end of the low point monitoring pipe;

[0018] The second normally closed valve, the sixth normally open valve, the filter, the seventh normally open valve, the third normally closed valve, the purity transmitter, the first flow meter and the fourth normally closed valve are sequentially arranged on the low point monitoring pipeline and the exhaust pipeline in the direction from the internal low point flange interface of the generator to the exhaust flange interface; the purity transmitter is connected to the purity display, and the pressure transmitter and the eighth normally open valve for controlling the on-off pressure transmitter of the gas circuit are connected between the third normally closed valve and the purity transmitter on the low point monitoring pipeline, and the purity transmitter, the purity display and the pressure transmitter are all connected to the line terminal board through the signal line;

[0019] One end of the high-point monitoring pipeline is connected to the high-point flange interface inside the generator, and the other end of the high-point monitoring pipeline is connected to the low-point monitoring pipeline between the second normally closed valve and the sixth normally open valve, and the fifth normally closed valve is arranged on the high-point monitoring pipeline;

[0020] A sampling port is arranged between the seventh normally open valve and the third normally closed valve on the low point monitoring pipeline, and a sixth normally closed valve is arranged at the sampling port.

[0021] It also includes an oxygen-in-hydrogen detection pipeline, one end of which is connected between the first flowmeter and the fourth normally closed valve, the other end of which is connected between the tail gas exhaust flange interface and the fourth normally closed valve, and the direction from the first flowmeter to the tail gas exhaust flange interface on the oxygen-in-hydrogen detection pipeline is sequentially provided with a seventh normally closed valve, a second flowmeter, a ninth normally open valve, a pressure reducer, a third flowmeter, an oxygen transmitter and a tenth normally open valve;

[0022] The oxygen in hydrogen detection pipeline is connected between the second flow meter and the ninth normally open valve and the low point monitoring pipeline is connected between the seventh normally open valve and the third normally closed valve;

[0023] A first calibration port is provided on the oxygen in hydrogen detection pipeline between the ninth normally open valve and the pressure reducer, and an eighth normally closed valve is provided at the first calibration port;

[0024] The oxygen transmitter is connected to the oxygen display, and both the oxygen transmitter and the oxygen display are connected to the line terminal board through the signal line.

[0025] The third normally closed valve is connected in parallel with a humidity monitoring pipeline, on which the eleventh normally open valve, a humidity transmitter and a twelfth normally open valve are arranged in sequence, the humidity transmitter is connected with a humidity display, and both the humidity transmitter and the humidity display are connected to the line terminal board through a signal line.

[0026] It also includes a calibration pipeline, one end of which is connected to the high-pressure area monitoring pipeline between the high-pressure flange interface of the generator fan and the first normally open valve, and a ninth normally closed valve is arranged at the other end of the calibration pipeline. The calibration pipeline is respectively connected to the high-point monitoring pipeline and the low-point monitoring pipeline between the second normally closed valve and the sixth normally open valve; a thirteenth normally open valve is arranged on the calibration pipeline between the high-pressure area monitoring pipeline and the low-point monitoring pipeline.

[0027] It also includes a pressure monitoring pipeline connected to the emptying pipeline and the low-pressure area monitoring pipeline respectively, the connection between the pressure monitoring pipeline and the emptying pipeline is located between the first flow meter and the fourth normally closed valve, and the connection between the pressure monitoring pipeline and the low-pressure area monitoring pipeline is located between the fourth normally open valve and the third normally open valve; the pressure monitoring pipeline is connected in parallel with a first pressure monitoring branch pipeline, a second pressure monitoring branch pipeline, a third pressure monitoring branch pipeline, a fourth pressure monitoring branch pipeline and a sewage pipeline, and the first pressure monitoring branch pipeline is provided with a first pressure switch and a first pressure switch for controlling the on-off of the gas circuit. a fourteenth normally open valve for closing the second pressure monitoring branch pipe, a second pressure switch and a fifteenth normally open valve for controlling the on-off of the second pressure switch for the gas circuit are provided on the second pressure monitoring branch pipe, a third pressure switch and a sixteenth normally open valve for controlling the on-off of the third pressure switch for the gas circuit are provided on the third pressure monitoring branch pipe, a pressure gauge and a seventeenth normally open valve for controlling the on-off of the pressure gauge for the gas circuit are provided on the fourth pressure monitoring branch pipe, a tenth normally closed valve is provided on the sewage pipeline; an eighteenth normally open valve is provided on a section of the pressure monitoring pipeline between the emptying pipeline and the low-pressure area monitoring pipeline;

[0028] The first pressure switch, the second pressure switch and the third pressure switch are all connected to the wire terminal board through signal wires.

[0029] By adopting the above technical solution, the present invention has the following beneficial effects:

[0030] 1. Integrated monitoring of all hydrogen parameters: It integrates all hydrogen parameters of the generator hydrogen system (including hydrogen purity, humidity, oxygen in hydrogen, hydrogen leakage, pressure, pressure switch alarm, differential pressure, hydrogen replenishment flow, etc.), and the equipment has a high degree of integration.

[0031] 2. Equipment update and convenient maintenance: Replace the hydrogen transmitter with high accuracy. Replace the pressure transmitter, differential pressure transmitter, and pressure switch with display, which makes on-site observation more intuitive. Add a travel switch in the cabinet to control the explosion-proof lighting, which is convenient for daily inspection and maintenance.

[0032] 3. Adequate monitoring: According to the new countermeasure requirements and technical specifications, the present invention adds hydrogen leakage monitoring to the hydrogen cooler, main oil tank and other areas of the unit, and adds an oxygen transmitter (micro oxygen meter) to avoid hydrogen leakage and explosion of the unit and strengthen hydrogen quality supervision.

[0033] 4. The system is easy to operate and maintain: The monitoring system process pipelines are standardized and easy to operate. A design flow chart is set on the surface of the cabinet, which is conducive to operation and maintenance.

[0034] 5. Data upload to the chemical centralized control room. Not only part of the data is transmitted to the unit DCS, but also a data output interface is set up to transmit the data to the chemical centralized control system, which is convenient for retaining and querying historical data, and can provide data curves and records for instrument failures and unit hydrogen replenishment, leakage, pressure fluctuations, etc., which is conducive to fault analysis and processing. All test data are designed with two analog outputs, one for DCS and the other for standby or to the cyclic centralized control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0036] like Figure 1 As shown, the generator hydrogen system hydrogen full parameter integrated online monitoring system of the present invention comprises a cabinet 1, the cabinet body of the cabinet 1 is provided with a generator fan high pressure flange interface 2, a generator fan low pressure port flange interface 3, a generator internal high point flange interface 4, a generator internal low point flange interface 5, an exhaust gas emptying flange interface 6, a hydrogen supplement gas inlet flange interface 7 and a hydrogen supplement gas outlet flange interface 8, and the cabinet 1 is provided with a wire terminal plate 9, a high pressure area monitoring pipeline 10, a low pressure area monitoring pipeline 11, a high point monitoring pipeline 12, a low point monitoring pipeline 13, and a low point monitoring pipeline 14. The measuring pipeline 13, the emptying pipeline 14 and the hydrogen replenishing pipeline 15; the high-pressure area monitoring pipeline 10 is connected to the high-pressure flange interface 2 of the generator fan, the low-pressure area monitoring pipeline 11 is connected to the low-pressure flange interface 3 of the generator fan, the high-point monitoring pipeline 12 is connected to the internal high-point flange interface 4 of the generator, the low-point monitoring pipeline 13 is connected to the internal low-point flange interface 5 of the generator, the emptying pipeline 14 is connected to the tail gas emptying flange interface 6, and the two ends of the hydrogen replenishing pipeline 15 are respectively connected to the hydrogen replenishing gas inlet flange interface 7 and the hydrogen replenishing gas outlet flange interface 8;

[0037] The line terminal panel 9 is provided with a hydrogen leakage display 57, a power supply interface 16, a hydrogen leakage detection signal output interface 17, a hydrogen leakage detection probe input interface 18, a hydrogen pressure high alarm interface 19, a hydrogen pressure low alarm interface 20, a hydrogen pressure too low alarm interface 21, a generator internal air pressure monitoring interface 22, a hydrogen humidity signal interface 23, a hydrogen purity signal interface 24, a hydrogen oxygen signal interface 25 and a differential pressure signal interface 26.

[0038] A mass flow meter 27 is provided on the hydrogen replenishment pipeline 15 , and a flow display 28 is connected to the mass flow meter 27 .

[0039] A differential pressure transmitter 29, a differential pressure gauge 30 and a first normally closed valve 88 are connected in parallel between the high pressure area monitoring pipeline 10 and the low pressure area monitoring pipeline 11; the differential pressure transmitter 29 is connected to the line terminal board 9 through a signal line;

[0040] A first normally open valve 86 and a second normally open valve 97 are provided on the high pressure area monitoring pipeline 10, and the distance between the first normally open valve 86 and the high pressure flange interface 2 of the generator fan is smaller than the distance between the second normally open valve 97 and the high pressure flange interface 2 of the generator fan;

[0041] The low-pressure area monitoring pipeline 11 is provided with a third normally open valve 95, a fourth normally open valve 87 and a fifth normally open valve 96 whose distances from the low-pressure port flange interface 3 of the generator fan are successively increased;

[0042] The differential pressure transmitter 29 is located between the second normally open valve 97 and the fifth normally open valve 96. The connection points of the differential pressure gauge 30 and the first normally closed valve 88 with the high-pressure area monitoring pipeline 10 are all located between the first normally open valve 86 and the second normally open valve 97. The connection points of the differential pressure gauge 30 and the first normally closed valve 88 with the low-pressure area monitoring pipeline 11 are all located between the fourth normally open valve 87 and the fifth normally open valve 96.

[0043] One end of the exhaust pipe 14 is connected to the exhaust flange interface 6, one end of the low point monitoring pipe 13 is connected to the internal low point flange interface 5 of the generator, and the other end of the exhaust pipe 14 is connected to the other end of the low point monitoring pipe 13;

[0044] The second normally closed valve 81, the sixth normally open valve 103, the filter 58, the seventh normally open valve 101, the third normally closed valve 106, the purity transmitter 31, the first flow meter 32 and the fourth normally closed valve 102 are sequentially arranged on the low point monitoring pipeline 13 and the exhaust pipeline 14 along the direction from the internal low point flange interface 5 of the generator to the exhaust gas exhaust flange interface 6; the purity transmitter 31 is connected to the purity display 33, and the pressure transmitter 34 and the eighth normally open valve 107 for controlling the on-off of the gas circuit pressure transmitter 34 are connected between the third normally closed valve 106 and the purity transmitter 31 on the low point monitoring pipeline 13, and the purity transmitter 31, the purity display 33 and the pressure transmitter 34 are all connected to the line terminal board 9 through the signal line;

[0045] One end of the high point monitoring pipeline 12 is connected to the high point flange interface 4 inside the generator, and the other end of the high point monitoring pipeline 12 is connected to the low point monitoring pipeline 13 between the second normally closed valve 81 and the sixth normally open valve 103. The high point monitoring pipeline 12 is provided with a fifth normally closed valve 80;

[0046] A sampling port 35 is provided on the low point monitoring pipeline 13 between the seventh normally open valve 101 and the third normally closed valve 106 , and a sixth normally closed valve 100 is provided at the sampling port 35 .

[0047] The present invention also includes a hydrogen-oxygen detection pipeline 36, one end of which is connected between the first flowmeter 32 and the fourth normally closed valve 102, and the other end of the hydrogen-oxygen detection pipeline 36 is connected between the tail gas exhaust flange interface 6 and the fourth normally closed valve 102. The hydrogen-oxygen detection pipeline 36 is provided with a seventh normally closed valve 82, a second flowmeter 40, a ninth normally open valve 83, a pressure reducer 37, a third flowmeter 38, an oxygen transmitter 39 and a tenth normally open valve 94 in sequence from the first flowmeter 32 to the tail gas exhaust flange interface 6;

[0048] The oxygen-in-hydrogen detection pipeline 36 is connected to the low point monitoring pipeline 13 at a position between the second flow meter 40 and the ninth normally open valve 83 and between the seventh normally open valve 101 and the third normally closed valve 106;

[0049] A first calibration port 41 is provided on the oxygen in hydrogen detection pipeline 36 between the ninth normally open valve 83 and the pressure reducer 37, and an eighth normally closed valve 105 is provided at the first calibration port 41;

[0050] The oxygen transmitter 39 is connected to the oxygen display 42 , and both the oxygen transmitter 39 and the oxygen display 42 are connected to the line terminal board 9 through a signal line.

[0051] The third normally closed valve 106 is connected in parallel with a humidity monitoring pipeline 43, on which the eleventh normally open valve 108, a humidity transmitter 44 and a twelfth normally open valve 109 are sequentially arranged, the humidity transmitter 44 is connected to a humidity display 45, and both the humidity transmitter 44 and the humidity display 45 are connected to the line terminal board 9 through a signal line.

[0052] The present invention also includes a calibration pipeline 46, one end of which is connected to the high-pressure area monitoring pipeline 10 between the generator fan high-pressure flange interface 2 and the first normally open valve 86, and the other end of the calibration pipeline 46 is provided with a ninth normally closed valve 104, and the calibration pipeline 46 is respectively connected to the high point monitoring pipeline 12 and the low point monitoring pipeline 13 between the second normally closed valve 81 and the sixth normally open valve 103; a thirteenth normally open valve 84 is provided on the calibration pipeline 46 between the high-pressure area monitoring pipeline 10 and the low point monitoring pipeline 13.

[0053] The present invention also includes a pressure monitoring pipeline 47 connected to the emptying pipeline 14 and the low-pressure area monitoring pipeline 11 respectively, the connection between the pressure monitoring pipeline 47 and the emptying pipeline 14 is located between the first flow meter 32 and the fourth normally closed valve 102, and the connection between the pressure monitoring pipeline 47 and the low-pressure area monitoring pipeline 11 is located between the fourth normally open valve 87 and the third normally open valve 95; the pressure monitoring pipeline 47 is connected in parallel with a first pressure monitoring branch pipeline 48, a second pressure monitoring branch pipeline 49, a third pressure monitoring branch pipeline 50, a fourth pressure monitoring branch pipeline 51 and a sewage pipeline 52, and the first pressure monitoring branch pipeline 48 is provided with a first pressure switch 53 and a first pressure switch 54 for controlling the on-off of the gas circuit. The fourteenth normally open valve 89 of the switch 53, the second pressure monitoring branch pipeline 49 is provided with a second pressure switch 54 and a fifteenth normally open valve 90 for controlling the on-off of the gas circuit of the second pressure switch 54, the third pressure monitoring branch pipeline 50 is provided with a third pressure switch 55 and a sixteenth normally open valve 91 for controlling the on-off of the gas circuit of the third pressure switch 55, the fourth pressure monitoring branch pipeline 51 is provided with a pressure gauge 56 and a seventeenth normally open valve 92 for controlling the on-off of the pressure gauge 56, the sewage pipeline 52 is provided with a tenth normally closed valve 93; the section of the pressure monitoring pipeline 47 between the emptying pipeline 14 and the low-pressure area monitoring pipeline 11 is provided with an eighteenth normally open valve 85;

[0054] The first pressure switch 53 , the second pressure switch 54 and the third pressure switch 55 are all connected to the line terminal board 9 through signal lines.

[0055] The specific process of the present invention when running is:

[0056] 1. Inspection before starting

[0057] The present invention must ensure the air tightness of the system pipeline before starting operation.

[0058] In an environment with hazardous gases, it is strictly forbidden to connect the equipment while it is powered on, or to open the cover to debug the functional instruments.

[0059] The differential pressure gauge 30, the differential pressure transmitter 29 and the first normally closed valve 88 must be opened. The first normally closed valve can be closed only when both the high-pressure area monitoring pipeline 10 and the low-pressure area monitoring pipeline 11 are connected, so that the differential pressure gauge 30 can work and other valves are in the closed state.

[0060] Check whether the process joint gas pipeline is loose or detached to ensure there is no leakage.

[0061] Check whether any components in cabinet 1 are dropped or lost.

[0062] 2. Operation of generator starting gas replacement

[0063] When the equipment starts to replace the air with carbon dioxide, take samples from the high point flange interface 4 inside the generator (open the fifth normally closed valve 80, the sixth normally open valve 103 and the seventh normally open valve 101, isolate the humidity transmitter 44 (close the eleventh normally open valve 108, the twelfth normally open valve 109, and open the third normally closed valve 106), isolate the oxygen transmitter 39 (close the ninth normally open valve 83 and the tenth normally open valve 94), start the purity transmitter 31 (open the fourth normally closed valve 102, adjust the first flow meter 32 to 0.5SCFH), observe the carbon dioxide concentration through the purity display 33, and discharge the carbon dioxide gas into the exhaust pipeline 14 until it is qualified.

[0064] When the equipment starts to replace carbon dioxide with hydrogen, sample is taken from the flange interface 5 at the low point inside the generator (close the fifth normally closed valve 80, open the second normally closed valve 81), isolate the humidity transmitter 44 (close the eleventh normally open valve 108 and the twelfth normally open valve 109, open the third normally closed valve 106), isolate the oxygen transmitter 39 (close the ninth normally open valve 83 and the tenth normally open valve 94), start the purity transmitter 31 (open the fourth normally closed valve 102, adjust the first flow meter 32 to 0.5SCFH), observe the hydrogen concentration through the purity display 33, and discharge the hydrogen into the exhaust pipeline 14 until it is qualified.

[0065] When the hydrogen purity is qualified, the pressure is increased to the rated hydrogen pressure of 0.4 MPa. At the same time, the pressure gauge 56 (opening the 17th normally open valve 92), the pressure transmitter 34 (opening the 8th normally open valve 107), the first pressure switch 53 (opening the 14th normally open valve 89), the second pressure switch 54 (opening the 15th normally open valve 90) and the third pressure switch 55 (opening the 16th normally open valve 91) are opened to monitor the change of hydrogen pressure. Samples are still taken from the low point flange interface 5 inside the generator and discharged into the exhaust pipeline 14 to detect the purity of hydrogen.

[0066] When the generator reaches the rated speed of 3000 rpm, a differential pressure is formed between the high-pressure area monitoring pipeline 10 and the low-pressure area monitoring pipeline 11. At this time, the differential pressure gauge 30 (opening the fifth normally open valve 96 and the second normally open valve 97) and the differential pressure transmitter 29 are put into operation. (Open the first normally open valve 86 and the fourth normally open valve 87, close the first normally closed valve 88, and monitor the differential pressure. At the same time, sample from the high point flange interface 4 inside the generator (close the second normally closed valve 81, open the thirteenth normally open valve 84), put into operation the purity transmitter 31, the humidity transmitter 44 (open the eleventh normally open valve 108, the twelfth normally open valve 109, and close the third normally closed valve 106), and the gas is discharged into the low-pressure area monitoring pipeline 11 (close the fourth normally closed valve 102, open the eighteenth normally open valve 85), forming an internal circulation monitoring (adjust the first flowmeter 32 to 0.5SCFH), which is under-pressure operation. Put the oxygen transmitter 39 into operation (open the ninth normally open valve 83 and the tenth normally open valve 94), and the oxygen in the hydrogen is discharged into the emptying pipeline 14 after the flow adjustment (adjust the second flowmeter 40 to 0.5SCFH) through the pressure reducing valve for emptying measurement.

[0067] When the equipment is put into normal operation, the sixth normally closed valve 100 can be opened, and sampling and testing can be carried out through the sampling port 35, and the data can be compared with the online table.

[0068] When the generator is operating normally, the hydrogen pressure will inevitably drop and hydrogen needs to be replenished. At this time, the flow display 28 is used to monitor the mass flow meter 27 to ensure that the flow rate during the hydrogen replenishment process is controllable.

[0069] At the same time, the hydrogen leakage display 57 monitors online and in real time whether the generator cooler return pipe, main oil tank, etc. are leaking hydrogen.

[0070] This forms an integrated online monitoring system for all hydrogen parameters.

[0071] 3. Operation of gas replacement when the generator is shut down

[0072] When the generator is shut down, it is necessary to exit the differential pressure monitoring (open the first normally closed valve 88), close the differential pressure gauge 30 (close the fifth normally open valve 96 and the second normally open valve 97) and the differential pressure transmitter 29 (close the first normally open valve 86 and the fourth normally open valve 87).

[0073] Exit the oxygen transmitter 39 (close the ninth normally open valve 83 and the tenth normally open valve 94).

[0074] When the hydrogen pressure drops to the point where carbon dioxide can be used to replace hydrogen, the generator internal high point flange interface 4 is used (the thirteenth normally open valve 84, the eighteenth normally open valve 85 and the second normally closed valve 81 are closed, and the fifth normally closed valve 80 and the fourth normally closed valve 102 are opened), the humidity transmitter 44 is isolated (the eleventh normally open valve 108, the twelfth normally open valve 109 are closed, and the third normally closed valve 106 is opened) and the oxygen transmitter 39 is isolated (the ninth normally open valve 83 and the tenth normally open valve 94 are closed), and the purity transmitter 31 is started (the fourth normally closed valve 102 is opened, and the first flow meter 32 is adjusted to 0.5 SCFH). The hydrogen concentration is observed through the purity display 33. The hydrogen concentration shows a downward trend, and the gas is discharged into the exhaust pipeline 14 until it is qualified.

[0075] When the equipment starts to replace carbon dioxide with air, sample from the flange interface 5 at the low point inside the generator (close the fifth normally closed valve 80, open the second normally closed valve 81), isolate the humidity transmitter 44 (close the eleventh normally open valve 108, the twelfth normally open valve 109, open the third normally closed valve 106) and isolate the oxygen transmitter 39 (close the ninth normally open valve 83 and the tenth normally open valve 94), start the purity transmitter 31 (open the fourth normally closed valve 102, adjust the first flow meter 32 to 0.5SCFH), observe the air concentration through the purity display 33, and observe that the air concentration shows an upward trend. The gas is discharged into the main exhaust pipe until it is qualified.

[0076] Exit hydrogen pressure monitoring, close the pressure gauge 56 (close the seventeenth normally open valve 92), the pressure transmitter 34 (close the eighth normally open valve 107), the first pressure switch 53 (close the fourteenth normally open valve 89), the second pressure switch 54 (close the fifteenth normally open valve 90) and the third pressure switch 55 (close the sixteenth normally open valve 91).

[0077] Close all valves except the first normally closed valve 88 .

[0078] During the maintenance of the generator, the purity can be checked by standard gas through the ninth normally closed valve 104, and the oxygen in hydrogen can be checked by standard gas through the eighth normally closed valve 105.

[0079] Exit the hydrogen leakage monitoring of the hydrogen leakage display 57, close the inlet and outlet valves of the generator cooler return pipe, and the valve at the main oil tank measuring point.

[0080] This embodiment does not impose any formal limitation on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. The generator hydrogen system hydrogen full parameter integrated online monitoring system is characterized by: It includes a cabinet, on which a high-pressure flange interface of a generator fan, a low-pressure flange interface of a generator fan, a high-point flange interface inside the generator, a low-point flange interface inside the generator, an exhaust flange interface, a hydrogen supply inlet flange interface and a hydrogen supply outlet flange interface are arranged; a line terminal plate, a high-pressure area monitoring pipeline, a low-pressure area monitoring pipeline, a high-point monitoring pipeline, a low-point monitoring pipeline, an exhaust pipeline and a hydrogen supply pipeline are arranged in the cabinet; the high-pressure area monitoring pipeline is connected to the high-pressure flange interface of the generator fan, the low-pressure area monitoring pipeline is connected to the low-pressure flange interface of the generator fan, the high-point monitoring pipeline is connected to the high-point flange interface inside the generator, the low-point monitoring pipeline is connected to the low-point flange interface inside the generator, the exhaust pipeline is connected to the exhaust flange interface, and the two ends of the hydrogen supply pipeline are respectively connected to the hydrogen supply inlet flange interface and the hydrogen supply outlet flange interface; The line terminal board is provided with a power supply interface, a hydrogen leak detection signal output interface, a hydrogen leak detection probe input interface, a hydrogen high pressure alarm interface, a hydrogen low pressure alarm interface, a hydrogen too low pressure alarm interface, a generator internal air pressure monitoring interface, a hydrogen humidity signal interface, a hydrogen purity signal interface, a hydrogen oxygen signal interface and a differential pressure signal interface; A mass flow meter is provided on the hydrogen replenishment pipeline, and the mass flow meter is connected to a flow display; A differential pressure transmitter, a differential pressure gauge and a first normally closed valve are connected in parallel between the high-pressure area monitoring pipeline and the low-pressure area monitoring pipeline; the differential pressure transmitter is connected to the line terminal board through a signal line; A first normally open valve and a second normally open valve are provided on the high-pressure area monitoring pipeline, and the distance between the first normally open valve and the high-pressure flange interface of the generator fan is smaller than the distance between the second normally open valve and the high-pressure flange interface of the generator fan; The low-pressure area monitoring pipeline is provided with a third normally open valve, a fourth normally open valve and a fifth normally open valve whose distances from the low-pressure port flange interface of the generator fan increase in sequence; The differential pressure transmitter is located between the second normally open valve and the fifth normally open valve, the connection points of the differential pressure gauge and the first normally closed valve and the high-pressure area monitoring pipeline are all located between the first normally open valve and the second normally open valve, and the connection points of the differential pressure gauge and the first normally closed valve and the low-pressure area monitoring pipeline are all located between the fourth normally open valve and the fifth normally open valve.

2. The generator hydrogen system hydrogen full parameter integrated online monitoring system according to claim 1 is characterized by: One end of the exhaust pipe is connected to the exhaust flange interface, one end of the low point monitoring pipe is connected to the internal low point flange interface of the generator, and the other end of the exhaust pipe is connected to the other end of the low point monitoring pipe; The second normally closed valve, the sixth normally open valve, the filter, the seventh normally open valve, the third normally closed valve, the purity transmitter, the first flow meter and the fourth normally closed valve are sequentially arranged on the low point monitoring pipeline and the exhaust pipeline in the direction from the internal low point flange interface of the generator to the exhaust flange interface; the purity transmitter is connected to the purity display, and the pressure transmitter and the eighth normally open valve for controlling the on-off pressure transmitter of the gas circuit are connected between the third normally closed valve and the purity transmitter on the low point monitoring pipeline, and the purity transmitter, the purity display and the pressure transmitter are all connected to the line terminal board through the signal line; One end of the high-point monitoring pipeline is connected to the high-point flange interface inside the generator, and the other end of the high-point monitoring pipeline is connected to the low-point monitoring pipeline between the second normally closed valve and the sixth normally open valve, and the fifth normally closed valve is arranged on the high-point monitoring pipeline; A sampling port is arranged between the seventh normally open valve and the third normally closed valve on the low point monitoring pipeline, and a sixth normally closed valve is arranged at the sampling port.

3. The generator hydrogen system hydrogen full parameter integrated online monitoring system according to claim 2 is characterized by: It also includes an oxygen-in-hydrogen detection pipeline, one end of which is connected between the first flowmeter and the fourth normally closed valve, the other end of which is connected between the tail gas exhaust flange interface and the fourth normally closed valve, and the direction from the first flowmeter to the tail gas exhaust flange interface on the oxygen-in-hydrogen detection pipeline is sequentially provided with a seventh normally closed valve, a second flowmeter, a ninth normally open valve, a pressure reducer, a third flowmeter, an oxygen transmitter and a tenth normally open valve; The oxygen in hydrogen detection pipeline is connected between the second flow meter and the ninth normally open valve and the low point monitoring pipeline is connected between the seventh normally open valve and the third normally closed valve; A first calibration port is provided on the oxygen in hydrogen detection pipeline between the ninth normally open valve and the pressure reducer, and an eighth normally closed valve is provided at the first calibration port; The oxygen transmitter is connected to the oxygen display, and both the oxygen transmitter and the oxygen display are connected to the line terminal board through the signal line.

4. The generator hydrogen system hydrogen full parameter integrated online monitoring system according to claim 3 is characterized by: The third normally closed valve is connected in parallel with a humidity monitoring pipeline, on which the eleventh normally open valve, a humidity transmitter and a twelfth normally open valve are arranged in sequence, the humidity transmitter is connected with a humidity display, and both the humidity transmitter and the humidity display are connected to the line terminal board through a signal line.

5. The generator hydrogen system hydrogen full parameter integrated online monitoring system according to claim 3 is characterized by: It also includes a calibration pipeline, one end of which is connected to the high-pressure area monitoring pipeline between the high-pressure flange interface of the generator fan and the first normally open valve, and a ninth normally closed valve is arranged at the other end of the calibration pipeline. The calibration pipeline is respectively connected to the high-point monitoring pipeline and the low-point monitoring pipeline between the second normally closed valve and the sixth normally open valve; a thirteenth normally open valve is arranged on the calibration pipeline between the high-pressure area monitoring pipeline and the low-point monitoring pipeline.

6. The generator hydrogen system hydrogen full parameter integrated online monitoring system according to claim 5 is characterized by: It also includes a pressure monitoring pipeline connected to the emptying pipeline and the low-pressure area monitoring pipeline respectively, the connection between the pressure monitoring pipeline and the emptying pipeline is located between the first flow meter and the fourth normally closed valve, and the connection between the pressure monitoring pipeline and the low-pressure area monitoring pipeline is located between the fourth normally open valve and the third normally open valve; the pressure monitoring pipeline is connected in parallel with a first pressure monitoring branch pipeline, a second pressure monitoring branch pipeline, a third pressure monitoring branch pipeline, a fourth pressure monitoring branch pipeline and a sewage pipeline, and the first pressure monitoring branch pipeline is provided with a first pressure switch and a first pressure switch for controlling the on-off of the gas circuit. a fourteenth normally open valve for closing the second pressure monitoring branch pipe, a second pressure switch and a fifteenth normally open valve for controlling the on-off of the second pressure switch for the gas circuit are provided on the second pressure monitoring branch pipe, a third pressure switch and a sixteenth normally open valve for controlling the on-off of the third pressure switch for the gas circuit are provided on the third pressure monitoring branch pipe, a pressure gauge and a seventeenth normally open valve for controlling the on-off of the pressure gauge for the gas circuit are provided on the fourth pressure monitoring branch pipe, a tenth normally closed valve is provided on the sewage pipeline; an eighteenth normally open valve is provided on a section of the pressure monitoring pipeline between the emptying pipeline and the low-pressure area monitoring pipeline; The first pressure switch, the second pressure switch and the third pressure switch are all connected to the wire terminal board through signal wires.

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