CN216356362U - Intelligent generator hydrogen cooling system - Google Patents
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- CN216356362U CN216356362U CN202121764557.4U CN202121764557U CN216356362U CN 216356362 U CN216356362 U CN 216356362U CN 202121764557 U CN202121764557 U CN 202121764557U CN 216356362 U CN216356362 U CN 216356362U
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Abstract
The utility model relates to an intelligent generator hydrogen cooling system, which belongs to the technical field of hydrogen cooling of hydrogen-cooled generator sets. When the generator needs to be dehydrogenated, the hydrogen can be recovered, and the hydrogen production cost of a power plant is reduced to the maximum extent. The utility model controls the micro-vacuum of the generator through the replacement mode, furthest ensures the consumable materials required by the replacement of the generator, saves the qualified replacement time, reduces the working intensity of operators, and saves the time for the operation and the overhaul of the hydrogen system of the power plant.
Description
Technical Field
The utility model relates to a system, in particular to an intelligent generator hydrogen cooling system, belongs to a power generator system, and particularly relates to the technical field of automatic control of a generator set hydrogen cooling system of a power plant.
Background
Modern power plants typically utilize generators to generate electricity. These generators generate a large amount of heat during operation that must be cooled in order for the generator to operate at maximum efficiency. Air is traditionally used as a cooling medium to help dissipate heat. However, as the generator capacity and volume increase, hydrogen gas replaces air due to its high heat capacity and low density. In addition, the hydrogen is smaller than air in volume ratio, and the wind resistance or friction loss of the generator is less. Because of the low windage losses and low efficiency, it is desirable to maintain as high a hydrogen purity and hydrogen pressure as possible in the generator. In order to seal hydrogen, the existing technology uses a sealing oil system to seal hydrogen inside the generator, which causes the sealing oil to contact with hydrogen, the sealing oil pollutes hydrogen, and the hydrogen purity is reduced, and for a 800 mw generator, the reduction of the hydrogen purity by 8% in the generator increases the generation cost by almost $ 4000 per day.
Hydrogen is dissolved into the seal oil during generator operation causing hydrogen consumption, and traditionally, in order to maintain the proper pressure level and purity in the generator, operators of the power plant continue to charge and discharge the generator with hydrogen periodically, causing significant economic loss. And once the generator breaks down and the relevant system is overhauled, the hydrogen removal replacement is needed, a large amount of carbon dioxide and hydrogen are consumed, a large amount of manpower is needed to operate in the replacement process, the cost and the labor are high, how to reduce the hydrogen recovery in the generator replacement process is reduced, the consumption of the carbon dioxide is reduced, the labor intensity of personnel is reduced, the purity and the pressure of the hydrogen are ensured in the normal operation process of the generator, and the problem that the generator is constantly in the optimal economic efficiency is solved by the design system and the control platform.
Chinese patent publication No. CN101006345B, publication No. 02/01/2012, discloses an invention named "system and method for maintaining purity of hydrogen in electric power generator". The patented purity system includes a generator, a hydrogen generator configured to provide hydrogen to the generator, and a purity monitor for detecting a level of purity of the hydrogen within the generator and providing a signal when the purity falls below a predetermined threshold; the system automatically compensates for gas loss or contamination to maintain a desired level of efficiency of the electrical power generator. The system is completely different from the system in the application in design structure and operation mode, the former can only ensure the hydrogen purity of the generator, the system in the application can be connected with a hydrogen-making station of a power plant and communicated with a hydrogen storage tank, the hydrogen discharged by the generator in a recovery mode is recycled through a hydrogen purification device and a hydrogen storage tank through a hydrogen pump, an accident can be discharged to the atmosphere through a discharge system, the automatic hydrogen charging is realized through a plurality of modes of a hydrogen control platform and the pressure control of the generator in the normal operation process of the generator, the automatic replacement can be realized when the generator is put into operation and overhauls, and the hydrogen purity can be ensured to be better than more than 99 percent through the purity control of the generator; the full-automatic control and manual control of the hydrogen cooling system of the generator can be realized according to the automatic operation steps, and the optimal operation condition of the generator can be met all the time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, and provides the intelligent generator hydrogen cooling system which has the advantages of reasonable structural design, safety, reliability, cost reduction, replacement qualification time saving, operator working strength reduction and time saving for commissioning and maintenance of a power plant hydrogen system.
The technical scheme adopted by the utility model for solving the problems is as follows: this intelligent generator hydrogen cooling system, including hydrogen supply pressure control valve, generator hydrogen shunt tubes inlet valve, carbon nanotube side secondary isolation door, generator carbon dioxide shunt tubes inlet valve, generator evacuation valve, carbon dioxide aerifys the door, hydrogen suction pump entry damper, hydrogen suction pump, carbon dioxide supply pressure control valve, hydrogen is gone into generator entry pipeline, generator hydrogen shunt tubes, generator carbon dioxide shunt tubes, carbon dioxide is gone into generator entry pipeline, send the hydrogen pipeline, hydrogen regeneration purifier, hydrogen manufacturing device access pipeline isolation valve, hydrogen storage device access pipeline, hydrogen storage device isolation valve, hydrogen busbar and carbon dioxide busbar, its characterized in that: the hydrogen production device enters a hydrogen suction pump through a hydrogen production device access pipeline in sequence through a hydrogen production device access pipeline isolation valve and a hydrogen suction pump inlet adjusting valve, is pressurized and is sent to a hydrogen regeneration purification device for purification, and then one branch hydrogen storage device access pipeline is opened through a hydrogen storage device isolation valve and is sent to a hydrogen storage device; one branch of the hydrogen feeding pipeline is converged with the hydrogen busbar, and the hydrogen is fed into the inlet pipeline of the generator through the pressure regulation of the hydrogen supply pressure control valve and the inlet valve of the hydrogen shunt pipe of the generator, and is fed into the hydrogen shunt pipe of the generator to charge the generator; discharging the carbon dioxide from the generator carbon dioxide shunt pipe into a generator inlet pipeline through a carbon dioxide shunt pipe inlet valve, a carbon tube side secondary isolation door and a generator exhaust valve to control atmosphere discharge; the carbon dioxide busbar is connected to the carbon dioxide tank, and carbon dioxide gas enters the generator carbon dioxide shunt pipe through the carbon dioxide inflation valve and the generator carbon dioxide shunt pipe inlet valve after being subjected to pressure regulation by the carbon dioxide supply pressure control valve.
Preferably, the present invention further comprises a hydrogen pipe side primary isolation door for primary isolation of the hydrogen pipe from the carbon dioxide pipe.
Preferably, the utility model also comprises a generator liquid level detector for detecting the generator liquid leakage and sending out an alarm signal.
Preferably, the utility model also comprises a hydrogen system DCS monitoring and controlling device used for hydrogen system pressure acquisition monitoring, purity measurement monitoring, insulation measurement monitoring, hydrogen humidity measurement monitoring, system logic control and alarm sending.
Preferably, the present invention further comprises a hydrogen supply pressure control valve bypass in communication with the hydrogen supply pressure control valve and a carbon dioxide supply pressure bypass control valve in communication with the carbon dioxide supply pressure control valve.
Preferably, the utility model also comprises a hydrogen system emptying valve used for the hydrogen system to be accessed into the atmosphere for emptying.
Preferably, the utility model also comprises a system safety valve for overpressure action pressure relief protection of the hydrogen system.
Preferably, the utility model also comprises a hydrogen regeneration purification device bypass valve which is used for providing bypass channel isolation and circulation after the hydrogen regeneration purification device is closed.
Compared with the prior art, the utility model has the following advantages and effects: the purity and the pressure in the generator are automatically maintained through a generator pressure control mode, a generator gas purity control mode and a generator gas replacement mode, so that the safe and economic operation of the generator is ensured, and meanwhile, the regeneration purification is provided for the generator and the hydrogen of related systems; when the generator needs to be dehydrogenated, the hydrogen can be recovered, so that the hydrogen production cost of a power plant is reduced to the maximum extent; the micro vacuum of the generator is controlled through a replacement mode, and consumable materials required by the replacement of the generator are guaranteed to the maximum extent; the replacement qualified time is saved, and the working intensity of operators is reduced; the time is saved for the commissioning and the overhaul of the hydrogen system of the power plant.
Drawings
FIG. 1 is a schematic structural diagram of a combined system of combustion engine power generation and thermoelectric power generation in an embodiment of the utility model.
In the figure: a hydrogen supply pressure control valve 1, a generator hydrogen shunt pipe inlet valve 2, a hydrogen pipe side primary isolation door 3, a carbon pipe side secondary isolation door 4, a generator carbon dioxide shunt pipe inlet valve 5, a generator exhaust valve 6, a carbon dioxide inflation valve 7, a hydrogen suction pump inlet adjusting valve 8, a hydrogen suction pump 9, a carbon dioxide supply pressure control valve 10, a hydrogen supply pressure control valve bypass 11, a carbon dioxide supply pressure bypass control valve 12, a hydrogen system exhaust valve 13, a system safety valve 14 and a hydrogen regeneration purification device bypass valve 15; hydrogen enters a generator inlet pipeline 101, a generator hydrogen shunt pipe 102, a generator carbon dioxide shunt pipe 103, a carbon dioxide enters a generator inlet pipeline 104 and a hydrogen delivery pipeline 106; the device comprises a hydrogen regeneration purification device 110, a hydrogen production device 120, a hydrogen production device access pipeline 1201 and a hydrogen production device access pipeline isolation valve 12011; hydrogen storage 130, hydrogen storage access line 1301, hydrogen storage isolation valve 13011; a hydrogen system DCS monitoring and control device 140, a hydrogen bus 150, a carbon dioxide bus 160 and a generator liquid level detector 170.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1, the intelligent generator hydrogen cooling system of this embodiment includes a hydrogen supply pressure control valve 1, a generator hydrogen shunt valve inlet valve 2, a carbon tube side secondary isolation door 4, a generator carbon dioxide shunt valve inlet valve 5, a generator evacuation valve 6, a carbon dioxide inflation valve 7, a hydrogen suction pump inlet regulating valve 8, a hydrogen suction pump 9, a carbon dioxide supply pressure control valve 10, a hydrogen inlet generator inlet pipeline 101, a generator hydrogen shunt valve 102, a generator carbon dioxide shunt valve 103, a carbon dioxide inlet generator inlet pipeline 104, a hydrogen delivery pipeline 106, a hydrogen regeneration purification device 110, a hydrogen producer 120, a hydrogen producer access pipeline 1201, a hydrogen producer access pipeline isolation valve 11, a hydrogen storage 130, a hydrogen storage access pipeline 1301, a hydrogen storage isolation valve 13011, a hydrogen manifold 150 and a carbon dioxide manifold 160, wherein the hydrogen producer (120) passes through the hydrogen producer access pipeline 1201 in sequence through the hydrogen producer access pipeline isolation valve 12011, a hydrogen storage device access pipeline isolation valve 12011, a hydrogen storage device, The inlet regulating valve 8 of the hydrogen suction pump enters the hydrogen suction pump 9 to be pressurized and sent to the hydrogen regeneration purification device 110 for purification, and then a branch hydrogen storage device access pipeline 1301 is opened through a hydrogen storage device isolation valve 13011 and sent to the hydrogen storage device 130; a branch hydrogen feeding pipeline 106 is converged with the hydrogen bus bar 150, pressure is regulated by a hydrogen supply pressure control valve 1, hydrogen is fed into a generator inlet pipeline 101 through a generator hydrogen shunt pipe inlet valve 2, and the hydrogen is fed into a generator hydrogen shunt pipe 102 to charge the generator; discharging the carbon dioxide from a generator carbon dioxide shunt pipe 103, entering a generator inlet pipeline 104 through carbon dioxide, controlling and discharging the atmosphere through a generator carbon dioxide shunt pipe inlet valve 5, a carbon pipe side secondary isolation door 4 and a generator exhaust valve 6; the carbon dioxide busbar 160 is connected to the carbon dioxide tank, and carbon dioxide enters the generator carbon dioxide shunt tube 103 through the carbon dioxide inflation valve 7 and the generator carbon dioxide shunt tube inlet valve 5 after being subjected to pressure regulation by the carbon dioxide supply pressure control valve 10;
the hydrogen pipe side primary isolation door 3 of the present embodiment is used for primary isolation of the hydrogen pipe from the carbon dioxide pipe.
The generator liquid level detector 170 of the present embodiment is used for generator liquid leakage detection and alarm signal sending.
The hydrogen system DCS monitoring and control device 140 of this embodiment is used for hydrogen system pressure acquisition monitoring, purity measurement monitoring, insulation measurement monitoring, hydrogen humidity measurement monitoring, system logic control, and alarm sending.
The hydrogen supply pressure control valve bypass 11 of the present embodiment communicates with the hydrogen supply pressure control valve 1, and the carbon dioxide supply pressure bypass control valve 12 communicates with the carbon dioxide supply pressure control valve 10.
The hydrogen system evacuation valve 13 of the embodiment is used for evacuating a hydrogen system by accessing the atmosphere; the system safety valve 14 is used for overpressure action pressure relief protection of the hydrogen system.
The hydrogen regeneration purification device bypass valve 15 of the present embodiment is used for providing bypass passage isolation and circulation after the hydrogen regeneration purification device 110 is closed.
The system function of the embodiment includes:
1) monitoring within the hydrogen system: the purity of hydrogen in the generator, the purity of hydrogen supplied by a hydrogen station, the purity of nitrogen dioxide supplied, the purity of hydrogen in a hydrogen storage tank and the purity of hydrogen at the outlet of the hydrogen regeneration and purification device 110;
2) generating a signal in response to said purity falling below a predetermined threshold; the purity of the gas supplied to the hydrogen control panel can automatically maintain the purity of the gas of the generator to be more than 98 percent in a normal range;
3) monitoring within the hydrogen system: hydrogen pressure in the generator, supplied hydrogen pressure, supplied nitrogen dioxide pressure, hydrogen pressure in the hydrogen storage tank, and hydrogen pressure at the outlet of the hydrogen regeneration purification device 110;
the outlet pressure of the hydrogen conveying pump and the inlet pressure of the hydrogen conveying pump; providing a hydrogen control panel in response to said signal to automatically maintain the generator gas pressure at an operator demand set value;
4) monitoring the humidity in the generator to respond to the humidity falling below a preset threshold value to generate a signal, and providing a basis for the generator to operate conveniently;
5) monitoring the insulation overheating in the generator on line, responding to the overheating degree higher than a preset threshold value, and generating a signal;
6) detecting the liquid level in the generator, responding to the situation that the sealing oil entering the generator reaches a preset threshold value or more, and generating a signal;
7) the control process of replacing air by carbon dioxide of the generator below the generator and then replacing the air into hydrogen is automatically completed, the process of recovering the hydrogen into the hydrogen storage device 130 is automatically completed, and the control process of replacing the hydrogen by the carbon dioxide and then replacing the hydrogen into the air is automatically completed;
the hydrogen system control mode comprises a generator pressure control mode, a generator gas purity control mode and a generator gas replacement mode;
the control process of the intelligent generator hydrogen cooling system of the embodiment is as follows:
(S1) generator pressure control mode: the mode automatically maintains the gas pressure in the generator, and controls the gas supply or exhaust of the generator through pressure setting so as to control the pressure in the generator; the generator gas pressure is maintained by the pressure regulating valves in the hydrogen supply pressure control valve 1 and the carbon dioxide supply pressure control valve 10; if the pressure regulating valve is out of order and cannot be regulated, the generator is isolated and repaired, and the generator is manually controlled through a hydrogen supply pressure control valve bypass 11 and a carbon dioxide supply pressure bypass control valve 12; the source of hydrogen is provided by hydrogen producer 120 or backup hydrogen manifold 150; if the generator is charged with carbon dioxide, a source of carbon dioxide is provided by carbon dioxide bus 160.
If the air pressure of the generator is lower than the rated air pressure after the generator normally operates, the temperature rise of a rotor winding can be caused; therefore, after the generator is low in air pressure and gives an alarm, the system automatically maintains hydrogen supplement and keeps rated hydrogen pressure; the low pressure alarm of the generator should be set within 5% of the normal air pressure; after the generator normally operates, if the air pressure of the generator is higher than the set pressure; therefore, after the generator gas pressure is high and the alarm is given, the operator needs to check and confirm that the hydrogen can be discharged to maintain the rated hydrogen pressure.
(S2) the generator gas purity control mode includes a hydrogen purity control mode and a carbon dioxide purity control mode; the gas purity in the generator is automatically maintained as a control target in the mode of the generator; in the hydrogen purity mode, when the preset value of the hydrogen purity is less than 90% when the generator operates, stopping the hydrogen system to operate, prompting the generator to stop operating, and reporting a dangerous fault with low purity; whether to perform the carbon dioxide replacement mode is prompted.
The purity of hydrogen is lower than 95%, the generator performs replacement of discharged and replenished hydrogen, an inlet valve 5 of a carbon dioxide shunt tube of the generator is opened, an exhaust valve 6 of the generator is opened according to the specified hydrogen flow rate for discharging hydrogen, the pressure of hydrogen is lower than 5% of the designed hydrogen pressure, a hydrogen producer 120 and a hydrogen producer access pipeline isolation valve 12011 in a hydrogen system are opened, a hydrogen suction pump 9 is started, a hydrogen supply pressure control valve 1 is opened, and hydrogen is opened from an inlet valve 2 of a hydrogen shunt tube of the generator to enter the top of the generator for replenishing hydrogen to maintain the pressure of the generator within a normal range; the flow of the hydrogen is controlled at the flow speed of the pipeline through the variable frequency rotating speed of the supply pump, so that the flow speed of the hydrogen supplement is ensured to be in a specified range; when the hydrogen purity reaches 100%, stopping low-purity discharge and supplement replacement of the hydrogen of the generator; the generator evacuation valve 6 is closed, and the hydrogen producer access line isolation valve 12011 is closed.
The purity of the hydrogen is lower than 96%, and whether the hydrogen regeneration purification device 110 works normally needs to be checked on site; after the generator is normally charged with hydrogen, the hydrogen regeneration and purification circulation mode is always in an operation state, and the hydrogen is continuously pumped out from the bottom of the generator to be purified and regenerated; controlling the purity of hydrogen: between 100% and 96%; the hydrogen regeneration purification device 110 needs to be stopped under manual control.
(S3-1) generator gas replacement mode: the mode is applied to the operation, shutdown, overhaul and emergency accident situations of a hydrogen system, and in the mode, when the interior of the generator is in an air state, the air of the generator is firstly pumped into vacuum through a suction pump; filling carbon dioxide, repeatedly filling and discharging until the purity of the carbon dioxide is qualified, filling hydrogen to replace the carbon dioxide, and repeatedly filling and discharging until the purity of the hydrogen is qualified; stopping the replacement mode; the hydrogen purity contract prompts whether to switch into a pressure control mode to improve the hydrogen pressure rating;
the system starting sequence is as follows: confirming the shutdown state before the system is started.
The first step is as follows: and (3) checking the opening of an inlet valve 5 of a carbon dioxide shunt pipe of the generator, opening a carbon pipe side secondary isolation door 4, opening an inlet adjusting door 8 of a hydrogen suction pump, opening a hydrogen regeneration purification device bypass valve 15, opening a hydrogen system exhaust valve 13, starting the hydrogen suction pump 9, pumping air of the generator to a vacuum state, completely closing system valves, and stopping the exhaust state.
The second step is that: confirming that the pressure of the carbon dioxide busbar is normal, enough carbon dioxide gas is accessed, opening a carbon dioxide inflation valve 7, opening an inlet valve 5 of a carbon dioxide shunt tube of the generator, and automatically opening a carbon dioxide supply pressure control valve 10 to control the air inflow of the carbon dioxide; when the pressure in the generator reaches 0.05Mpa, opening a hydrogen pipeline exhaust valve of the generator to exhaust outside the plant; when the pressure is reduced to 0.03Mpa, the exhaust valve of the hydrogen pipeline of the generator is closed; when the pressure in the generator rises to 0.05Mpa, the exhaust valve of the hydrogen pipeline of the generator is continuously opened to exhaust the gas outside the plant; when the pressure is reduced to 0.02Mpa, the exhaust valve of the hydrogen pipeline of the generator is closed, and the process is repeated; when the purity of carbon dioxide in the generator reaches 86%, starting the generator, a hydrogen drier, each oil-water alarm, an insulation overheating monitoring device and a floater oil tank gas side blow-down door, and carrying out blow-down on each dead angle by a purity meter blow-down door to test the purity of the carbon dioxide in each dead angle to be more than 96%; the purity of carbon dioxide in the generator and in each dead angle is more than 96 percent, the carbon dioxide inflating valve 7 is closed, the inlet valve 5 of the carbon dioxide shunt tube of the generator is closed, and the carbon dioxide supply pressure control valve 10 is closed to stop filling carbon dioxide.
The third step: replacing carbon dioxide with hydrogen; the generator is ready to be charged with hydrogen, the hydrogen generator access pipeline isolation valve 12011 is opened, the generator hydrogen shunt pipe inlet valve 2 and the hydrogen supply pressure control valve 1 are opened, the hydrogen suction pump 9 is started, and hydrogen is charged from the top of the generator; the inlet valve 5 of the carbon dioxide shunt pipe of the generator is opened, the secondary isolation door 4 at the carbon tube side is opened, the exhaust valve 6 of the generator at the bottom of the generator is opened to maintain the pressure in the generator at 0.05MPa, the carbon dioxide pipeline blow-down door of the generator is opened to blow down, and when the pressure is reduced to 0.02MPa, the exhaust valve of the carbon dioxide pipeline is closed; starting when the pressure is increased to 0.05Mpa, and setting the cycle times to be repeated; when the hydrogen purity in the generator is monitored to be more than 98%, starting the generator, a hydrogen drier, an oil-water alarm, an insulation overheating monitoring device, a purity meter and a moisture meter blow-down door to blow down the blow-down at each dead angle, and testing the hydrogen purity at each dead angle to be more than 98%; when the purity of hydrogen in the generator is more than 98 percent; the qualified hydrogen purity indicates whether to switch into a pressure control mode to increase the hydrogen pressure to a rated pressure.
(S3-2) generator gas replacement mode: in the mode, when the interior of the generator is in a hydrogen state, the hydrogen of the generator is conveyed into the gas storage device through the suction pump, the pressure of the generator is reduced to 0.05MPa, and recovery is stopped; opening a hydrogen system exhaust valve 13 to perform generator vacuum pumping; filling carbon dioxide, repeatedly filling and discharging until the purity of the carbon dioxide is qualified, filling air to replace the carbon dioxide, and repeatedly filling and discharging until the purity of the air is qualified; stopping the replacement mode; shutting down the hydrogen system and associated equipment;
the system starting sequence is as follows: confirming that the system has hydrogen desorption conditions.
The first step is as follows: checking the opening of an inlet valve 2 of a hydrogen shunt pipe of the generator, the opening of a primary isolation door 3 at the hydrogen pipe side, the opening of an inlet adjusting door 8 of a hydrogen suction pump, the opening of a bypass valve 15 of a hydrogen regeneration purification device, the opening of an isolation valve 13011 of a hydrogen storage device, starting the hydrogen suction pump 9, introducing hydrogen in the generator into the hydrogen storage device 130, reducing the pressure of the generator to 0.05MPa, stopping recovery, and closing the isolation valve 13011 of the hydrogen storage device; the hydrogen system exhaust valve 13 is opened, and the generator enters a vacuum pumping and air exhausting state; and stopping the pump to close all system valves after the generator has a certain vacuum degree.
The second step is that: confirming that the pressure of the carbon dioxide busbar is normal, enough carbon dioxide gas is accessed, opening a carbon dioxide inflation valve 7, opening an inlet valve 5 of a carbon dioxide shunt tube of the generator, and automatically opening a carbon dioxide supply pressure control valve 10 to control the air inflow of the carbon dioxide; when the pressure in the generator reaches 0.05Mpa, opening a generator exhaust valve 6 to exhaust the gas outside the plant; when the pressure is reduced to 0.03Mpa, the emptying valve 6 of the generator is closed; when the pressure in the generator rises to 0.05Mpa, the exhaust valve 6 of the generator is continuously opened to exhaust the gas outside the plant; when the pressure is reduced to 0.02Mpa, the emptying valve 6 of the generator is closed, and the process is repeated; when the purity of carbon dioxide in the generator reaches 86%, starting the generator, a hydrogen drier, each oil-water alarm, an insulation overheating monitoring device and a floater oil tank gas side blow-down door, and carrying out blow-down on each dead angle by a purity meter blow-down door to test the purity of the carbon dioxide in each dead angle to be more than 96%; the purity of carbon dioxide in the generator and in each dead angle is more than 96 percent, the carbon dioxide inflating valve 7 is closed, the inlet valve 5 of the carbon dioxide shunt tube of the generator is closed, and the carbon dioxide supply pressure control valve 10 is closed to stop filling carbon dioxide.
The third step: replacing carbon dioxide with air; the generator is ready to be inflated with air, the generator is connected with a pipeline to temporarily compress the air, the pressure in the generator is kept at 0.05MPa, a carbon dioxide pipeline blowdown door of the generator is opened to carry out blowdown, and when the pressure is reduced to 0.02MPa, the carbon dioxide pipeline exhaust door is closed; opening again when the pressure is increased to 0.05Mpa, and repeating the operation; after monitoring that the oxygen content in the air in the generator is normal, starting the generator, a hydrogen drier, an oil-water alarm, an insulation overheating monitoring device, a purity meter and a moisture meter blow-down door to blow down the air at each dead angle, and testing the oxygen content in the air at each dead angle to be qualified; shutting down the hydrogen system; and closing each valve of the system.
The function and description of each part name in this embodiment are as follows:
The hydrogen generator 120 produces qualified hydrogen for the generator; a hydrogen production device access pipeline 1201 is connected with a pipeline from a hydrogen production device to an inlet of a suction pump; the hydrogen producer is connected with a pipeline isolation valve 12011 to produce hydrogen producer and is communicated with the pipeline isolation valve to the inlet of the suction pump; the hydrogen storage device 130 is used for hydrogen storage of the hydrogen system and provides a standby hydrogen source for the system; the hydrogen storage device access line 1301 is used for connecting a hydrogen storage device to a hydrogen system; the hydrogen system DCS monitoring and control device 140 is used for hydrogen system pressure acquisition monitoring, purity measurement monitoring, insulation measurement monitoring, hydrogen humidity measurement monitoring, system logic control, and alarm sending. And (4) selecting a mode. Providing human-computer interface communication control; the hydrogen bus bar 150 is used for the access of canned hydrogen; the carbon dioxide busbar 160 is used for access of canned carbon dioxide; the generator liquid level detector 170 is used for generator liquid leakage detection and alarm signal sending.
The hydrogen supply pressure control valve 1 is used for controlling the pressure and flow of hydrogen entering the generator; the inlet valve 2 of the hydrogen shunt pipe of the generator is used for isolating hydrogen from entering or flowing out of the generator; the primary isolation door 3 at the hydrogen pipe side is used for primary isolation of the hydrogen pipe and the carbon dioxide pipe; the carbon tube side secondary isolation door 4 is used for secondary isolation of the hydrogen tube and the carbon dioxide tube; the inlet valve 5 of the carbon dioxide shunt pipe of the generator is used for isolating carbon dioxide gas from entering or flowing out of the generator; the generator exhaust valve 6 is used for communicating and isolating the interior of the generator with the atmosphere and communicating exhaust gas; the carbon dioxide charging valve 7 is used for isolating carbon dioxide gas intake; the hydrogen suction pump inlet adjusting valve 8 is used for controlling the inlet flow entering the pump; the hydrogen suction pump 9 is used for sucking and conveying gas; the carbon dioxide supply pressure control valve 10 is used for controlling the pressure and flow of carbon dioxide entering the generator; the hydrogen supply pressure control valve bypass 11 provides bypass connection and isolation when the hydrogen supply pressure control valve 1 fails; the carbon dioxide supply pressure bypass control valve 12 provides bypass connection and isolation when the carbon dioxide supply pressure control valve (10) fails; the hydrogen system exhaust valve 13 is used for connecting the hydrogen system to atmosphere for exhausting; the system safety valve 14 performs pressure relief protection when the hydrogen system is in overpressure action; the hydrogen regeneration purification device bypass valve 15 is used for providing bypass channel isolation and circulation after the hydrogen regeneration purification device is closed.
The hydrogen-cooled generator set is used for power generation in a power plant; the generator evacuation line is used for communicating the interior of the generator with the atmosphere.
And will be apparent to those skilled in the art from the foregoing description.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the utility model are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.
Claims (8)
1. The utility model provides an intelligent generator hydrogen cooling system, includes that hydrogen goes into generator inlet pipeline (101), generator hydrogen shunt tubes (102), generator carbon dioxide shunt tubes (103), carbon dioxide go into generator inlet pipeline (104), send hydrogen pipeline (106), hydrogen generator access line (1201), hydrogen generator access line isolation valve (12011), hydrogen storage device access line (1301), hydrogen storage device isolation valve (13011), hydrogen busbar (150) and carbon dioxide busbar (160), its characterized in that: also comprises a hydrogen supply pressure control valve (1), a generator hydrogen shunt pipe inlet valve (2), a carbon tube side secondary isolation door (4), a generator carbon dioxide shunt pipe inlet valve (5), a generator exhaust valve (6), a carbon dioxide inflation valve (7), a hydrogen suction pump inlet adjusting valve (8), a hydrogen suction pump (9), a carbon dioxide supply pressure control valve (10), a hydrogen regeneration purification device (110), a hydrogen production device (120) and a hydrogen storage device (130), the hydrogen production device (120) enters a hydrogen suction pump (9) through a hydrogen production device access pipeline (1201) in sequence through a hydrogen production device access pipeline isolation valve (12011) and a hydrogen suction pump inlet adjusting valve (8) and is pressurized and sent to a hydrogen regeneration purification device (110) for purification, a branch hydrogen storage device access pipeline (1301) is opened through a hydrogen storage device isolation valve (13011) and is sent into the hydrogen storage device (130); a branch hydrogen feeding pipeline (106) is converged with the hydrogen busbar (150), and hydrogen is fed into a generator inlet pipeline (101) through a hydrogen shunt pipe inlet valve (2) of the generator under the pressure regulation of a hydrogen supply pressure control valve (1) and is fed into a generator hydrogen shunt pipe (102) to charge the generator; the discharged carbon dioxide enters a generator inlet pipeline (104) from a generator carbon dioxide shunt pipe (103) through carbon dioxide and is controlled by a generator carbon dioxide shunt pipe inlet valve (5), a carbon tube side secondary isolation door (4) and a generator exhaust valve (6) to discharge atmosphere; the carbon dioxide busbar (160) is connected to the carbon dioxide tank, and carbon dioxide gas enters the generator carbon dioxide shunt pipe (103) through the carbon dioxide inflation valve (7) and the generator carbon dioxide shunt pipe inlet valve (5) after being subjected to pressure regulation by the carbon dioxide supply pressure control valve (10).
2. The intelligent generator hydrogen cooling system of claim 1, wherein: the device also comprises a hydrogen pipe side primary isolation door (3) for primary isolation of the hydrogen pipe and the carbon dioxide pipe.
3. The intelligent generator hydrogen cooling system of claim 1, wherein: the liquid level detector (170) is used for detecting the liquid leakage of the generator and sending out an alarm signal.
4. The intelligent generator hydrogen cooling system of claim 1, wherein: the system also comprises a hydrogen system DCS monitoring and controlling device (140) which is used for hydrogen system pressure acquisition monitoring, purity measurement monitoring, insulation measurement monitoring, hydrogen humidity measurement monitoring, system logic control and alarm sending.
5. The intelligent generator hydrogen cooling system of claim 1, wherein: the hydrogen and carbon dioxide integrated device further comprises a hydrogen supply pressure control valve bypass (11) and a carbon dioxide supply pressure bypass control valve (12), wherein the hydrogen supply pressure control valve bypass (11) is communicated with the hydrogen supply pressure control valve (1), and the carbon dioxide supply pressure bypass control valve (12) is communicated with the carbon dioxide supply pressure control valve (10).
6. The intelligent generator hydrogen cooling system of claim 1, wherein: the hydrogen system emptying valve (13) is used for accessing the hydrogen system into the atmosphere for emptying.
7. The intelligent generator hydrogen cooling system of claim 1, wherein: the system also comprises a system safety valve (14) for overpressure action pressure relief protection of the hydrogen system.
8. The intelligent generator hydrogen cooling system of claim 1, wherein: the hydrogen regeneration purification device bypass valve (15) is used for providing bypass channel isolation and circulation after the hydrogen regeneration purification device (110) is closed.
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| CN202121764557.4U CN216356362U (en) | 2021-07-30 | 2021-07-30 | Intelligent generator hydrogen cooling system |
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| CN202121764557.4U CN216356362U (en) | 2021-07-30 | 2021-07-30 | Intelligent generator hydrogen cooling system |
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