CN104613460A - Medium-pressure water supply system for fuel gas thermal power plant and start and stop method thereof - Google Patents
Medium-pressure water supply system for fuel gas thermal power plant and start and stop method thereof Download PDFInfo
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- CN104613460A CN104613460A CN201510052524.XA CN201510052524A CN104613460A CN 104613460 A CN104613460 A CN 104613460A CN 201510052524 A CN201510052524 A CN 201510052524A CN 104613460 A CN104613460 A CN 104613460A
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Abstract
The invention provides a medium-pressure water supply system for a fuel gas thermal power plant and a start and stop method of the medium-pressure water supply system. The medium-pressure water supply system for the fuel gas thermal power plant comprises a medium-pressure steam drum system and a medium-pressure water supply pump system. The medium-pressure steam drum system is connected with a medium-pressure water supply pump system. The medium-pressure steam drum system comprises a medium-pressure steam drum, a medium-pressure economizer, a medium-pressure evaporator, a medium-pressure superheater, a medium-pressure steam drum water feeding main passage, a medium-pressure steam drum water feeding by-passage, a first medium-pressure reheater and a second medium-pressure reheater. The medium-pressure water supply pump system comprises a first medium-pressure water feeding pump branch passage and a second medium-pressure water feeding pump branch passage which are connected in parallel. The parallel connection ends of the first medium-pressure water feeding pump branch passage and the second medium-pressure water feeding pump branch passage are connected with a low-pressure steam drum, and the other ends are connected to the medium-pressure economizer. By means of the medium-pressure water supply system and the start and stop method, automatic start of the medium-pressure water supply system is achieved under the state that the medium-pressure water supply system for the fuel gas thermal power plant completely stops or partially starts, automatic stop of the medium-pressure water supply system is achieved under the operation state, and the original operation state is not affected.
Description
Technical field
The invention relates in gas power station and press water-supply technology, particularly about pressure water supply system in a kind of gas power station and start and stop method thereof.
Background technology
In gas power station, the major function of pressure water supply system presses feed pump that middle pressure drum is delivered in the feedwater of low-pressure drum in utilizing, and press the Water Level Control of Steam at desired value in handle and adjusted by upper water valve throwing water level automatic.But pressure water supply system cannot in gas power station under pressure water supply system full cut-off state in existing gas power station, the automatic startup of pressure water supply system in realization, the automatic stopping of pressure water supply system in cannot realizing under operation, and cannot in gas power station pressure water supply system part start state under, the automatic startup of pressure water supply system in realization, and do not disturb original running status.
Summary of the invention
Embodiments provide pressure water supply system and starting method thereof in a kind of gas power station, with under pressure water supply system full cut-off state in gas power station or under the state of part startup, the automatic startup of pressure water supply system in realization, and do not disturb original running status.
To achieve these goals, embodiments provide pressure water supply system in a kind of gas power station, in described gas power station, pressure water supply system comprises: middle pressure boiler system and middle pressure feed-water pump, and described middle pressure boiler system connects described middle pressure feed-water pump;
Described middle pressure boiler system comprises: water main road, middle pressure drum are pressed in reheater and second in water bypass, first for middle pressure drum, middle pressure economizer, middle pressure evaporimeter, middle pressure superheater, middle pressure drum and presses reheater;
After on described middle pressure drum, on water main road and middle pressure drum, water bypass is connected in parallel, one end is connected to described middle pressure drum, and the other end presses economizer to be connected to described middle pressure feed pump on supply line; Entrance and the outlet of described middle pressure evaporimeter are connected to middle pressure drum respectively; Described middle pressure drum is connected to the entrance of middle pressure superheater, and the outlet of described middle pressure superheater presses reheater to be connected to condenser and steam turbine by pressing in reheater and second in described first successively, and on the pipeline removing condenser, is provided with intermediate pressure by-pass adjusts valve;
Described middle pressure feed-water pump comprises: press in feed pump branch road and second in parallel first and press feed pump branch road, press feed pump branch road to be connected low-pressure drum with pressing one end of feed pump branch road in second in parallel described first, the other end is connected to described middle pressure economizer; Feed water on the direction of described middle pressure economizer by from low-pressure drum, press in described first feed pump branch road is provided with in the first pump intake motor-driven valve, the first pump intake filter screen, first successively and press feed pump and the first pump discharge motor-driven valve; Feed water on the direction of described middle pressure economizer by from low-pressure drum, press in described second feed pump branch road is provided with in the second pump intake motor-driven valve, the second pump intake filter screen, second successively and press feed pump and the second pump discharge motor-driven valve.
In one embodiment, water main road to be provided with described middle pressure drum on middle pressure drum water main road on water main road motor-driven valve and middle pressure drum and to adjust valve; Water bypass to be provided with described middle pressure drum on middle pressure drum water bypass on water bypass motor-driven valve and middle pressure drum and to adjust valve.
In one embodiment, the supply line between described middle pressure economizer and middle pressure feed pump is disposed with emptying motor-driven valve, the first safety door and first flow orifice plate.
In one embodiment, press in described middle pressure superheater and first and the pipeline between reheater is disposed with middle pressure superheater outlet electric valve and middle pressure superheater outlet adjusts valve.
In one embodiment, press in described second on the pipeline between reheater and condenser and steam turbine and be disposed with the second safety door, the 3rd safety door and second orifice.
In one embodiment, also comprise in described middle pressure boiler system: in first, press reheater desuperheating water pipeline, on this pipeline of pressing one end of reheater desuperheating water pipeline to be connected in described first in first to press in reheater and second and press between reheater, the other end is connected on the supply line between described middle pressure economizer and emptying motor-driven valve; This is pressed in first reheater desuperheating water pipeline is disposed with in first to press in reheater desuperheating water motor-driven valve, the 3rd flow-through orifice and first and presses reheater desuperheating water to adjust valve.
In one embodiment, also comprise in described middle pressure boiler system: in second, press reheater desuperheating water pipeline, this presses reheater desuperheating water pipeline one end to be connected on the supply line between emptying motor-driven valve and the first safety door in second, and the other end is connected in the second safety door and second on the pipeline of pressing between reheater; This is pressed in second reheater desuperheating water pipeline arranges in second to press in reheater desuperheating water motor-driven valve, the 4th flow-through orifice and second and presses reheater desuperheating water to adjust valve.
In one embodiment, be also provided with in described middle pressure boiler system: middle pressure water supply system programed logic action button, middle pressure feed pump preliminary election button, middle pressure drum allows upper water ACK button and the water filling of middle pressure drum watering pipeline to complete ACK button.
In one embodiment, described middle pressure feed-water pump is also provided with: the first pump frequency conversion differential pressure automatic button, the first pump interlocking are thrown standby button, the second pump frequency conversion differential pressure automatic button and the second pump interlocking and thrown standby button.
To achieve these goals, embodiments provide a kind of start and stop method, described start and stop method comprises: setting up procedure, and this setting up procedure comprises:
Judge to comprise the first pump discharge motor-driven valve, second pump discharge motor-driven valve, the hydrophobic motor-driven valve of first pump discharge, the hydrophobic motor-driven valve of second pump discharge, reheater desuperheating water motor-driven valve is pressed in first, reheater desuperheating water is pressed to adjust valve in first, reheater desuperheating water motor-driven valve is pressed in second, reheater desuperheating water is pressed to adjust valve in second, the urgent hydrophobic motor-driven valve of drum is pressed in first, the urgent hydrophobic motor-driven valve of drum is pressed in second, the hydrophobic motor-driven valve of economizer exit is pressed in first, the hydrophobic motor-driven valve of economizer exit is pressed in second, the hydrophobic motor-driven valve of evaporator is pressed in first, the hydrophobic motor-driven valve of evaporator is pressed in second, water main road motor-driven valve on middle pressure drum, on middle pressure drum, water main road adjusts valve, on middle pressure drum, on water bypass motor-driven valve and middle pressure drum, whether water bypass adjusts the valve sets of valve to close, first pump recycles motor-driven valve and whether the second pump recirculation motor-driven valve has opened and on middle pressure drum, whether water bypass has thrown automatically, if not, send and close all valves in described valve sets, open the first pump recirculation motor-driven valve and the second pump recirculation motor-driven valve and automatic instruction is thrown in water bypass on middle pressure drum,
If so, judge whether to there is the middle pressure feed pump run;
If there is no the middle pressure feed pump run carries out, and judges whether the middle pressure feed pump of preliminary election ran more than first scheduled time; If the middle pressure feed pump off-duty of preliminary election or operation, more than first scheduled time, send the instruction of the middle pressure feed pump starting preliminary election;
If the middle pressure feed pump of preliminary election runs exceed described first scheduled time, drum pressure in judgement, is pressed whether to be less than or greater than the first predetermined pressure;
If middle pressure drum pressure is less than the first predetermined pressure, the emptying motor-driven valve of drum in judgement, is pressed whether to open; If the emptying motor-driven valve of middle pressure drum is not opened, send in unlatching the instruction of pressing the emptying motor-driven valve of drum;
If the emptying motor-driven valve of middle pressure drum is opened, steam water-level in judgement, is pressed whether to be less than or greater than the first predetermined water level;
If middle pressure steam water-level is less than the first predetermined water level, in judgement, press drum wall temperature whether to be less than the first predetermined temperature, or judge whether to receive the upper water manual confirmation of permission;
If so, the water filling of drum watering pipeline is pressed whether to complete in judgement; If the water filling of middle pressure drum watering pipeline does not complete, send in open shop the instruction of pressing feed pump to export Electrically operated gate second scheduled time;
If the water filling of middle pressure drum watering pipeline completes, judge whether the middle pressure feed pump outlet Electrically operated gate run is opened, if not, send the instruction of opening the middle pressure feed pump outlet Electrically operated gate run;
If the middle pressure feed pump outlet Electrically operated gate run is opened, press feed pump frequency conversion differential pressure automatically whether to drop in judgement, if not, send in input and press the automatic instruction of feed pump frequency conversion differential pressure;
If middle pressure feed pump frequency conversion differential pressure drops into automatically, press water bypass valve on drum whether to open to predetermined aperture in judgement, and on middle pressure drum, whether water bypass motor-driven valve is opened, and whether middle pressure feed pump interlocking drop into; If not, send and water bypass valve on middle pressure drum is opened to predetermined aperture, and water bypass motor-driven valve on middle pressure drum is opened, and the instruction dropped into that middle pressure feed pump is interlocked;
If water bypass valve is opened to predetermined aperture on middle pressure drum, and on middle pressure drum, water bypass motor-driven valve is opened, and middle pressure feed pump interlocking drops into, presses the water level of drum whether to be greater than described first predetermined water level in judgement;
If the water level of middle pressure drum is greater than described first predetermined water level, water regulating valve water level is pressed in drum bypass automatically whether to drop in judgement and whether the 3rd scheduled time; If not, send made a basket pressure drum on the automatic instruction of water regulating valve water level;
If water regulating valve water level has dropped into and time delay the 3rd scheduled time automatically in the bypass of middle pressure drum, judge whether combustion engine has fire and whether middle pressure drum pressure is greater than described first predetermined pressure;
If combustion engine has fire and middle pressure drum pressure is greater than described first predetermined pressure, press in judgement steam water-level whether between predetermined water level interval and the emptying motor-driven valve of middle pressure drum whether close, if not, sending to make a basket presses water regulating valve water level in drum bypass automatic, and the instruction of the emptying motor-driven valve of Central Shanxi Plain pressure drum.
In one embodiment, described start and stop method also comprises:
Judge whether combustion engine puts out a fire and on middle pressure drum, water bypass adjusts valve whether to close;
If combustion engine is put out a fire and on middle pressure drum, water bypass adjusts valve to close, press feed pump to interlock in judgement and whether exit, if middle pressure feed pump interlocking does not exit, send the instruction exiting middle pressure feed pump interlocking;
If whether middle pressure feed pump interlocking exits, drum feedwater main road control valve and middle pressure drum feed water by-pass control valve is pressed whether to be all switched to manually and to close in judgement, and press feed pump whether all to stop in two, if not, send and stop pressing in two feed pump, whether middle pressure drum feedwater main road control valve and middle pressure drum feed water by-pass control valve are all switched to manually and the instruction of closing;
If middle pressure drum feedwater main road control valve and middle pressure drum feed water by-pass control valve are all switched to manually and close, and press feed pump all to stop in two, judge in two, to press feed pump outlet electric valve whether to close; If not, the instruction of pressing feed pump outlet electric valve in closedown two is sent;
If press feed pump outlet electric valve to close in two, water bypass motor-driven valve on water main road motor-driven valve and middle pressure drum is pressed on drum whether to close in judgement and whether middle pressure reheater desuperheating water motor-driven valve is switched to manually and closes; If not, send in closedown and to press on drum water bypass motor-driven valve on water main road motor-driven valve and middle pressure drum, and middle pressure reheater desuperheating water motor-driven valve is switched to manually and the instruction of closing.
In one embodiment, the condition that described setting up procedure operation performs is: low-pressure drum water level is greater than-1250mm.
In one embodiment, if there is the middle pressure feed pump run, drum pressure in judgement, is pressed whether to be less than or greater than the first predetermined pressure.
In one embodiment, if middle pressure drum pressure is greater than the first predetermined pressure, steam water-level in judgement, is pressed whether to be less than or greater than the first predetermined water level.
In one embodiment, if middle pressure steam water-level is greater than the first predetermined water level, the water filling of drum watering pipeline in judgement, is pressed whether to complete.
The beneficial effect of the embodiment of the present invention is, pass through the present invention, can in gas power station under pressure water supply system full cut-off state, the automatic startup of pressure water supply system in realization, the automatic stopping of pressure water supply system in realizing under operation, and under the state that pressure water supply system part starts in gas power station, the automatic startup of pressure water supply system in realization, and do not disturb original running status.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the middle pressure boiler system of the embodiment of the present invention;
Fig. 2 is the structural representation of the middle pressure feed-water pump of the embodiment of the present invention;
Fig. 3 is the setting up procedure flow chart of pressure water supply system start and stop method in the gas power station of the embodiment of the present invention;
Fig. 4 is the stopping flow chart of steps of pressure water supply system start and stop method in the gas power station of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides pressure water supply system in a kind of gas power station, and in described gas power station, pressure water supply system comprises: middle pressure boiler system and middle pressure feed-water pump, and described middle pressure boiler system connects described middle pressure feed-water pump.
As shown in Figure 1, described middle pressure boiler system comprises: the parts such as water bypass on water main road, middle pressure drum, middle pressure reheater 5 and middle pressure reheater 6 on middle pressure drum 100, middle pressure economizer 2, middle pressure evaporimeter 3, middle pressure superheater 4, middle pressure drum.
After on middle pressure drum, on water main road and middle pressure drum, water bypass is connected in parallel, one end is connected to middle pressure drum 100, and the other end presses economizer 2 to be connected to middle pressure feed pump on supply line 30.Entrance (pressing the filter screen 48 on drum 100 in connection) and the outlet of middle pressure evaporimeter 3 are connected to middle pressure drum 100 respectively.Middle pressure drum 100 is connected to the entrance of middle pressure superheater 4, the outlet of middle pressure superheater 4 is connected to condenser and steam turbine (middle pressure main steam) by middle pressure reheater 5 and middle pressure reheater 6 successively, and on the pipeline removing condenser, be provided with intermediate pressure by-pass tune valve 27.The entrance of middle pressure superheater 4 and middle pressure drum 100 are all connected in one presses drum bursting diaphragm 22.
Water main road to be provided with middle pressure drum on middle pressure drum water main road on water main road motor-driven valve 14 and middle pressure drum and to adjust valve 15.Water bypass to be provided with middle pressure drum on middle pressure drum water bypass on water bypass motor-driven valve 16 and middle pressure drum and to adjust valve 17.Supply line 30 on middle pressure economizer 2 and middle pressure drum on water main road and middle pressure drum between water bypass is connected with middle pressure economizer hydrophobic pipeline 31, presses in this on economizer hydrophobic pipeline 31 and be connected with the hydrophobic motor-driven valve of middle pressure economizer exit 18 and the hydrophobic motor-driven valve 19 of middle pressure economizer exit.Supply line 30 between middle pressure economizer 2 and middle pressure feed pump is disposed with emptying motor-driven valve 1, safety door 32 and flow-through orifice 33.Pipeline between the entrance of middle pressure evaporimeter 3 and middle pressure drum 100 is connected with middle pressure evaporimeter hydrophobic pipeline 34, and middle pressure evaporimeter hydrophobic pipeline 34 is provided with the hydrophobic motor-driven valve of middle pressure evaporator 25 and the hydrophobic motor-driven valve 26 of middle pressure evaporator.
Pipeline between middle pressure superheater 4 and middle pressure reheater 5 is disposed with middle pressure superheater outlet electric valve 7 and middle pressure superheater outlet adjusts valve 8.Middle pressure superheater outlet is adjusted on the pipeline 35 between valve 8 and middle pressure reheater 5 and is connected with cold steam again to reheater motor-driven valve 13.
Between middle pressure reheater 6 and condenser and steam turbine, pipeline is disposed with safety door 36, safety door 37 and flow-through orifice 38, pipeline between safety door 37 and flow-through orifice 38 is provided with the emptying pipeline 39 of middle pressure main steam, presses in this on emptying pipeline of main steam 39 and be provided with the emptying motor-driven valve of middle pressure main steam 23 and the emptying motor-driven valve 24 of middle pressure main steam.
Also comprise in one in middle pressure boiler system of the present invention and press reheater desuperheating water pipeline 40, on the pipeline of pressing one end of reheater desuperheating water pipeline 40 to be connected between middle pressure reheater 5 and middle pressure reheater 6 in this, on the supply line 30 of pressing the other end of reheater desuperheating water pipeline 40 to be connected between middle pressure economizer 2 and emptying motor-driven valve 1 in this.Press in this on reheater desuperheating water pipeline 40 and be provided with middle pressure reheater desuperheating water motor-driven valve 9 and middle pressure reheater desuperheating water tune valve, middle pressure reheater desuperheating water motor-driven valve 9 is adjusted in valve with middle pressure reheater desuperheating water and is pressed economizer 10 to be provided with flow-through orifice 41.
Also comprise in another in middle pressure boiler system of the present invention and press reheater desuperheating water pipeline 42, press reheater desuperheating water pipeline 42 one end to be connected on the supply line 30 between emptying motor-driven valve 1 and safety door 32 in this, in this, press reheater desuperheating water pipeline 42 other end to be connected on the pipeline between safety door 36 and middle pressure reheater 6.Press in this on reheater desuperheating water pipeline 42 and arrange middle pressure reheater desuperheating water motor-driven valve 11 and middle pressure reheater desuperheating water tune valve 12, middle pressure reheater desuperheating water motor-driven valve 11 and middle pressure reheater desuperheating water are adjusted between valve 12 and are also provided with a flow-through orifice 43.
In addition, drum 100 is pressed also to be connected with safety door 44, safety door 45 and safety door 46 in this, press drum 100 also to connect an emergency blowoff pipeline 47 in this, this emergency blowoff pipeline 47 is provided with the urgent hydrophobic motor-driven valve 20 of middle pressure drum and the urgent hydrophobic motor-driven valve 21 of middle pressure drum.
As shown in Figure 1, middle pressure water supply system programed logic action button a1, middle pressure feed pump preliminary election button a2, middle pressure drum allows upper water ACK button a3 and the water filling of middle pressure drum watering pipeline to complete ACK button a4.
As shown in Figure 2, described middle pressure feed-water pump comprises: press in #1 in parallel in feed pump branch road 213 and #2 and press feed pump branch road 214, and pipeline one end of this parallel connection connects low-pressure drum, and the other end is connected to middle pressure economizer 2.Feed water on the direction of middle pressure economizer 2 by from low-pressure drum, press in #1 feed pump branch road 213 is provided with in #1 pump intake motor-driven valve 201, inlet screen 3, #1 successively and press feed pump 205, #1 pump discharge motor-driven valve 209.Feed water on middle pressure economizer direction by from low-pressure drum, press in #2 feed pump branch road 214 is provided with in #2 pump intake motor-driven valve 202, inlet screen 204, #2 successively and press feed pump 206, #2 pump discharge motor-driven valve 210.
In addition, press in #1 in the #1 of feed pump 205 and #1 pump discharge motor-driven valve 209 to press on feed pump branch road 213 and be connected with low-pressure drum water return pipeline 215 and hydraulic pipeline 216, this low-pressure drum water return pipeline 215 is provided with #1 pump recirculation motor-driven valve 207, this hydraulic pipeline 216 is provided with the hydrophobic motor-driven valve 211 of #1 pump discharge; Press in #2 in the #2 of feed pump 206 and #2 pump discharge motor-driven valve 210 to press on feed pump branch road 214 and be connected with low-pressure drum water return pipeline 217 and hydraulic pipeline 218, this low-pressure drum water return pipeline 217 is provided with #2 pump recirculation motor-driven valve 208, this hydraulic pipeline 218 is provided with the hydrophobic motor-driven valve 212 of #1 pump discharge.
Middle pressure feed-water pump is also arranged four buttons, respectively: #1 pump frequency conversion differential pressure automatically (button), #1 pump interlocking is thrown standby (button), #2 pump frequency conversion differential pressure automatic (button) and #2 pump interlocking and thrown standby (button).3) by clicking #1 pump frequency conversion differential pressure, (button) and #2 pump frequency conversion differential pressure automatically (button), can be selected respectively to press in No. 1, preliminary election in feed pump and No. 2, preliminary election and press feed pump automatically.
In described in middle pressure boiler system shown in Fig. 1 and Fig. 2 in pressure feed-water pump, middle pressure drum 100 effect receives the feedwater from low-pressure drum, and will be supplied to Steam Turbine Through IP Admission acting by the superheated steam heated as reservoir vessel.The function of middle pressure feed pump (press in #1 in feed pump 205 and #2 and press feed pump 206) is the feedwater of suction low-pressure drum and provides pressure head, is delivered to middle pressure drum 100, presses the normal upper water of drum in guarantee; Feed pump outlet is pressed to provide part feedwater to middle pressure reheater (middle pressure reheater 5 and middle pressure reheater 6) to do desuperheating water use in addition.Middle pressure feedwater piping (on middle pressure drum water bypass on water main road and middle pressure drum) there is water on two-way to adjust valve and motor-driven valve after adjusting valve, main road upper hose footpath is larger, bypass upper hose footpath is less, to use on pressure drum water bypass to adjust valve to be more suitable for control flow, therefore, on pressure drum, water bypass adjusts valve in programmed logic, be used for water and throw water level and automatically control.Low-pressure drum feedwater is sucked by middle pressure feed pump and provides in certain pressure head process presses economizer 2 to be heated, adjust valve and motor-driven valve to control feedwater flow by water bypass on middle pressure drum and deliver to middle pressure drum, feedwater in middle pressure drum is constantly heated to middle pressure steam by middle pressure evaporimeter and returns middle pressure drum 100, and steam in middle pressure drum 100 through in press superheater to be heated to superheated steam to be supplied to Steam Turbine Through IP Admission acting.
As shown in Figure 3, the embodiment of the present invention provides a kind of start and stop method, is applied to pressure water supply system in the gas power station shown in Fig. 1 and Fig. 2, and this start and stop method comprises setting up procedure, and this setting up procedure comprises:
Whether S301: judge whether some doors close, press the recirculation motor-driven valve of feed pump (#1 pump recirculation motor-driven valve 7 and #2 pump recirculation motor-driven valve 8) to open in two and on middle pressure drum, whether water bypass has thrown automatically;
Judge whether some doors have closed the pass feedback can passing through whether to receive some and judged, some doors comprise: #1 pump discharge motor-driven valve 209, #2 pump discharge motor-driven valve 210, the hydrophobic motor-driven valve 211 of #1 pump discharge, the hydrophobic motor-driven valve 212 of #2 pump discharge, middle pressure reheater desuperheating water motor-driven valve 9, middle pressure reheater desuperheating water adjusts valve 10, middle pressure reheater desuperheating water motor-driven valve 11, middle pressure reheater desuperheating water adjusts valve 12, the urgent hydrophobic motor-driven valve 20 of middle pressure drum, the urgent hydrophobic motor-driven valve 21 of middle pressure drum, the hydrophobic motor-driven valve 18 of middle pressure economizer exit, the hydrophobic motor-driven valve 19 of middle pressure economizer exit, the hydrophobic motor-driven valve 25 of middle pressure evaporator, the hydrophobic motor-driven valve 26 of middle pressure evaporator, water main road motor-driven valve 14 on middle pressure drum, on middle pressure drum, water main road adjusts valve 15, on middle pressure drum, on water bypass motor-driven valve 16 and middle pressure drum, valve 17 is adjusted in water bypass.
If some doors close, press the recirculation motor-driven valve of feed pump to open in two and on middle pressure drum, water bypass has been thrown automatically, carry out S303, otherwise, carry out S302, send out the recirculation motor-driven valve of pressing feed pump in two, water bypass on middle pressure drum is thrown automatically, and close #1 pump discharge motor-driven valve 209, #2 pump discharge motor-driven valve 210, the hydrophobic motor-driven valve 211 of #1 pump discharge, the hydrophobic motor-driven valve 212 of #2 pump discharge, middle pressure reheater desuperheating water motor-driven valve 9, middle pressure reheater desuperheating water adjusts valve 10, middle pressure reheater desuperheating water motor-driven valve 11, middle pressure reheater desuperheating water adjusts valve 12, the urgent hydrophobic motor-driven valve 20 of middle pressure drum, the urgent hydrophobic motor-driven valve 21 of middle pressure drum, the hydrophobic motor-driven valve 18 of middle pressure economizer exit, the hydrophobic motor-driven valve 19 of middle pressure economizer exit, the hydrophobic motor-driven valve 25 of middle pressure evaporator, the hydrophobic motor-driven valve 26 of middle pressure evaporator, water main road motor-driven valve 14 on middle pressure drum, on middle pressure drum, water main road adjusts valve 15, on middle pressure drum, on water bypass motor-driven valve 16 and middle pressure drum, the instruction of valve 17 is adjusted in water bypass.
S303: judge whether to there is the middle pressure feed pump run, the middle pressure feed pump if there is no run carries out S304; Otherwise, carry out S306.Be judged whether that middle pressure feed pump runs in this step, if without pump operation, continue next step, if there is pump operation, skip to S306.This avoid the original running status of pressure water supply system in interference, it also avoid the repeated priming work of middle pressure feed pump.
S304: judge whether the middle pressure feed pump of preliminary election has run more than first scheduled time (such as 30 seconds), in this step, can by selecting to press in feed pump and No. 2, preliminary election in No. 1, preliminary election to press feed pump.If the middle pressure feed pump off-duty of preliminary election or operation, more than first scheduled time, carry out S305, send the instruction of the middle pressure feed pump starting preliminary election.If the middle pressure feed pump of preliminary election ran more than 30 seconds, carry out S306.
S306: press drum pressure to be less than or greater than the first predetermined pressure (such as 0.1MPa) in judgement, if middle pressure drum pressure is less than the first predetermined pressure, carry out S307; If middle pressure drum pressure is greater than the first predetermined pressure, carry out S309.This step considers middle pressure drum and has been in hot situation, therefore this step avoids the original running status of pressure water supply system in interference, it also avoid the repeated priming work of middle pressure water supply system.
S307: press the emptying motor-driven valve of drum whether to open in judgement, if not, carry out S308, send in unlatching the instruction of pressing the emptying motor-driven valve of drum.
S309: press steam water-level to be less than or greater than the first predetermined water level (such as-200mm) in judgement, if middle pressure steam water-level is less than the first predetermined water level, carry out S310; If middle pressure steam water-level is greater than the first predetermined water level, carry out S313.This step considers the situation that middle pressure steam water-level has reached desired value, therefore this step avoids the original running status of pressure water supply system in interference, and the water conservancy project that repeats that it also avoid middle pressure water supply system is done.
S310: press drum wall temperature whether to be less than the first predetermined temperature (being such as 120 degree) in judgement, or whether receive the upper water manual confirmation of permission, if middle pressure drum wall temperature is less than the first predetermined temperature, or receive the upper water manual confirmation of permission, carry out S311.If be greater than 120 DEG C, power plant operations staff can according in press the temperature difference of coolant-temperature gage on the wall temperature of drum and middle pressure drum, judging whether can to water on middle pressure drum.
S311: press drum watering pipeline (supply line 30) water filling whether to complete in judgement and (ACK button can be completed by click water filling and judge whether water filling completes, when operations staff observe the exhaust of middle pressure drum supply line bursting diaphragm terminate and continuously water breakthrough time, pipeline water filling can be clicked and complete ACK button, continue next step); If the water filling of middle pressure drum watering pipeline does not complete, carry out S312, send in open shop the instruction of pressing feed pump to export Electrically operated gate second scheduled time (such as 15S); Otherwise, carry out S313.
S313: judge whether the middle pressure feed pump outlet Electrically operated gate run is opened, if not, carries out S314, sends the instruction of opening the middle pressure feed pump outlet Electrically operated gate run; If the middle pressure feed pump outlet Electrically operated gate run is opened, carry out S315.
S315: whether press feed pump frequency conversion differential pressure automatically to drop in judgement, if not, carry out S316, send in input and press the automatic instruction of feed pump frequency conversion differential pressure, in one embodiment, setting value is 1.0MPa.If middle pressure feed pump frequency conversion differential pressure drops into automatically, carry out S317.
S317: press water bypass valve on drum whether to open to predetermined aperture (such as 10%) in judgement, and on middle pressure drum, whether water bypass motor-driven valve is opened, and whether middle pressure feed pump interlocking drops into.After middle pressure feed pump interlocking drops into, when central pressure feed pump outlet main-piping pressure is lower than certain definite value; Or when having arbitrary middle pressure Feed Pump Trip, all can press feed pump in another by interlocked startup, thus it is normal to press feed pump to export main-piping pressure in ensureing.
If water bypass valve is opened to predetermined aperture on middle pressure drum, and on middle pressure drum, water bypass motor-driven valve is opened, and middle pressure feed pump interlocking drops into, carries out S319; Otherwise, carry out S318, send and water bypass valve on middle pressure drum is opened to predetermined aperture, and water bypass motor-driven valve on middle pressure drum is opened, and the instruction dropped into that middle pressure feed pump is interlocked.
S319: press the water level of drum whether to be greater than described first predetermined water level (-200mm) in judgement, if so, carry out S320.
S320: to press in drum bypass water regulating valve water level automatically whether to drop in judgement and whether time delay 1 minute, if water regulating valve water level has dropped into and time delay 1 minute automatically in the bypass of middle pressure drum, has carried out S322; Otherwise, carry out S321, send and made a basket the automatic instruction of water regulating valve water level on pressure drum.
In this gas power station, the start and stop method (programme-control enable logic) of pressure water supply system can meet the automatic control of water pressure and steam water-level on centering pressure drum, therefore also just meets the automatic control of water on centering pressure drum under different load operating mode.The automatic control of upper water pressure pressed the frequency conversion differential pressure of feed pump automatically to realize by making a basket, and is embodied in S315; The automatic control of steam water-level adjusted the water lev el control of valve to realize by making a basket water on pressure drum, is embodied in S320.
S322: judge whether combustion engine has fire and whether middle pressure drum pressure is greater than described first predetermined pressure (0.1MPa), if combustion engine has fire and middle pressure drum pressure is greater than described first predetermined pressure, carries out S323.
S323: press in judgement steam water-level whether between predetermined water level interval (such as-50mm is to 50mm) and the emptying motor-driven valve of middle pressure drum whether close; If middle pressure steam water-level is not between predetermined water level interval, or the emptying motor-driven valve of middle pressure drum does not close, carry out S324, send and made a basket water regulating valve water level automatic (such as setting value 0mm) in the bypass of pressure drum, and the instruction of the emptying motor-driven valve of Central Shanxi Plain pressure drum.
In one embodiment, the condition that described setting up procedure operation performs is: low-pressure drum water level is greater than-1250mm.
By the flow process shown in Fig. 3, achieve the automatic startup of pressure water supply system under system full cut-off state in this gas power station.
In one embodiment, in the gas power station of the embodiment of the present invention, pressure water supply system start and stop method also comprises stopping step, and as shown in Figure 4, described stopping step comprising:
S401: judge combustion engine whether put out a fire and on middle pressure drum water bypass adjust valve whether close, if combustion engine fire extinguishing and on middle pressure drum water bypass adjust valve close, carry out S402.
S402: press feed pump to interlock in judgement and whether exit, if so, carry out S404; Otherwise, carry out S403 and send the instruction exiting middle pressure feed pump interlocking.
S404: press drum feedwater main road control valve and middle pressure drum feed water by-pass control valve whether are all switched to manually and close in judgement, and press feed pump whether all to stop in two, if so, carry out S406; Otherwise, carry out S405, send and stop pressing feed pump in two, whether middle pressure drum feedwater main road control valve and middle pressure drum feed water by-pass control valve are all switched to manually and the instruction of closing.
S406: judge to press feed pump outlet electric valve whether to close in two; If press feed pump outlet electric valve to close in two, carry out S408; Otherwise carry out S407, send the instruction of pressing feed pump outlet electric valve in closedown two.
S408: to press on drum water bypass motor-driven valve on water main road motor-driven valve and middle pressure drum whether to close in judgement and whether middle pressure reheater desuperheating water motor-driven valve is switched to manually and closes, if not, carry out S409, send in closedown and to press on drum water bypass motor-driven valve on water main road motor-driven valve and middle pressure drum, and middle pressure reheater desuperheating water motor-driven valve is switched to manually and the instruction of closing.
By the flow process shown in Fig. 4, achieve pressure water supply system automatic stopping under operation in gas power station.
Start and stop method of the present invention is divided into setting up procedure and stops step two parts, 4 artificial action buttons are comprised: middle pressure water supply system programed logic action button a1 in middle pressure boiler system, middle pressure feed pump preliminary election button a2, middle pressure drum allows upper water ACK button a3 and the water filling of middle pressure drum watering pipeline to complete ACK button a4.Start and stop method of the present invention, achieves following function:
The first, the automation achieved in gas power station under the automation start-up and operation state of pressure water supply system under full cut-off state stops;
The second, achieve the automation of pressure water supply system under part starting state in gas power station start and do not disturb original running status;
Three, artificial judgement is taken into account, the leapfrog that can realize pressure water supply system journey start and stop method in gas power station runs, when the condition of a certain step of start and stop method is unrealized cause other step to carry out time, whether Rule of judgment that can be artificial can be ignored and operate leapfrog action, continues the operation of start and stop method until complete.
In the present invention, determination methods in Fig. 3 and Fig. 4 needs to carry out (if judging whether valve is opened by the feedback judging whether to receive valve opening) based on the feedback received, when the start and stop method (programed logic) of pressure water supply system in gas power station proceeds to a certain step, when not receiving due feedback signal, programed logic can rest on this step, waits for manual operation.Power plant operations staff can find the unreceived feedback signal of current operation step sequence, artificially judges whether unreceived feedback signal affects the continuation execution of programed logic.If this feedback signal does not affect proceeding of present procedure control logic, operations staff can operate the execution that leapfrog action continues programed logic; If this feedback signal affects proceeding of present procedure control logic, then operations staff according to each the unsatisfied feedback signal found, can go investigation problem targetedly, until after receiving this feedback signal, continues performing a programme control logic.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Apply specific embodiment in the present invention to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (15)
1. a pressure water supply system in gas power station, is characterized in that, in described gas power station, pressure water supply system comprises: middle pressure boiler system and middle pressure feed-water pump, and described middle pressure boiler system connects described middle pressure feed-water pump;
Described middle pressure boiler system comprises: water main road, middle pressure drum are pressed in reheater and second in water bypass, first for middle pressure drum, middle pressure economizer, middle pressure evaporimeter, middle pressure superheater, middle pressure drum and presses reheater;
After on described middle pressure drum, on water main road and middle pressure drum, water bypass is connected in parallel, one end is connected to described middle pressure drum, and the other end presses economizer to be connected to described middle pressure feed pump on supply line; Entrance and the outlet of described middle pressure evaporimeter are connected to middle pressure drum respectively; Described middle pressure drum is connected to the entrance of middle pressure superheater, and the outlet of described middle pressure superheater presses reheater to be connected to condenser and steam turbine by pressing in reheater and second in described first successively, and on the pipeline removing condenser, is provided with intermediate pressure by-pass adjusts valve;
Described middle pressure feed-water pump comprises: press in feed pump branch road and second in parallel first and press feed pump branch road, press after pressing feed pump branch circuit parallel connection in feed pump branch road and second in described first, one end connects low-pressure drum, and the other end is connected to described middle pressure economizer; Feed water on the direction of described middle pressure economizer by from low-pressure drum, press in described first feed pump branch road is provided with in the first pump intake motor-driven valve, the first pump intake filter screen, first successively and press feed pump and the first pump discharge motor-driven valve; Feed water on the direction of described middle pressure economizer by from low-pressure drum, press in described second feed pump branch road is provided with in the second pump intake motor-driven valve, the second pump intake filter screen, second successively and press feed pump and the second pump discharge motor-driven valve.
2. pressure water supply system in gas power station according to claim 1, is characterized in that, water main road to be provided with described middle pressure drum on middle pressure drum water main road on water main road motor-driven valve and middle pressure drum and to adjust valve; Water bypass to be provided with described middle pressure drum on middle pressure drum water bypass on water bypass motor-driven valve and middle pressure drum and to adjust valve.
3. pressure water supply system in gas power station according to claim 1, is characterized in that, the supply line between described middle pressure economizer and middle pressure feed pump is disposed with emptying motor-driven valve, the first safety door and first flow orifice plate.
4. pressure water supply system in gas power station according to claim 1, is characterized in that, presses the pipeline between reheater to be disposed with middle pressure superheater outlet electric valve and middle pressure superheater outlet adjusts valve in described middle pressure superheater and first.
5. pressure water supply system in gas power station according to claim 1, is characterized in that, presses on the pipeline between reheater and condenser and steam turbine and be disposed with the second safety door, the 3rd safety door and second orifice in described second.
6. pressure water supply system in gas power station according to claim 1, it is characterized in that, also comprise in described middle pressure boiler system: in first, press reheater desuperheating water pipeline, on this pipeline of pressing one end of reheater desuperheating water pipeline to be connected in described first in first to press in reheater and second and press between reheater, the other end is connected on the supply line between described middle pressure economizer and emptying motor-driven valve; This is pressed in first reheater desuperheating water pipeline is disposed with in first to press in reheater desuperheating water motor-driven valve, the 3rd flow-through orifice and first and presses reheater desuperheating water to adjust valve.
7. pressure water supply system in gas power station according to claim 1, it is characterized in that, also comprise in described middle pressure boiler system: in second, press reheater desuperheating water pipeline, this presses reheater desuperheating water pipeline one end to be connected on the supply line between emptying motor-driven valve and the first safety door in second, and the other end is connected in the second safety door and second on the pipeline of pressing between reheater; This is pressed in second reheater desuperheating water pipeline arranges in second to press in reheater desuperheating water motor-driven valve, the 4th flow-through orifice and second and presses reheater desuperheating water to adjust valve.
8. pressure water supply system in gas power station according to claim 1, it is characterized in that, also be provided with in described middle pressure boiler system: middle pressure water supply system programed logic action button, middle pressure feed pump preliminary election button, middle pressure drum allows upper water ACK button and the water filling of middle pressure drum watering pipeline to complete ACK button.
9. pressure water supply system in gas power station according to claim 1, it is characterized in that, described middle pressure feed-water pump is also provided with: the first pump frequency conversion differential pressure automatic button, the first pump interlocking are thrown standby button, the second pump frequency conversion differential pressure automatic button and the second pump interlocking and thrown standby button.
10. a start and stop method, is applied to pressure water supply system in the gas power station according to any one of claim 1-9, it is characterized in that, described start and stop method comprises: setting up procedure, and this setting up procedure comprises:
Judge to comprise the first pump discharge motor-driven valve, second pump discharge motor-driven valve, the hydrophobic motor-driven valve of first pump discharge, the hydrophobic motor-driven valve of second pump discharge, reheater desuperheating water motor-driven valve is pressed in first, reheater desuperheating water is pressed to adjust valve in first, reheater desuperheating water motor-driven valve is pressed in second, reheater desuperheating water is pressed to adjust valve in second, the urgent hydrophobic motor-driven valve of drum is pressed in first, the urgent hydrophobic motor-driven valve of drum is pressed in second, the hydrophobic motor-driven valve of economizer exit is pressed in first, the hydrophobic motor-driven valve of economizer exit is pressed in second, the hydrophobic motor-driven valve of evaporator is pressed in first, the hydrophobic motor-driven valve of evaporator is pressed in second, water main road motor-driven valve on middle pressure drum, on middle pressure drum, water main road adjusts valve, on middle pressure drum, on water bypass motor-driven valve and middle pressure drum, whether water bypass adjusts the valve sets of valve to close, first pump recycles motor-driven valve and whether the second pump recirculation motor-driven valve has opened and on middle pressure drum, whether water bypass has thrown automatically, if not, send and close all valves in described valve sets, open the first pump recirculation motor-driven valve and the second pump recirculation motor-driven valve and automatic instruction is thrown in water bypass on middle pressure drum,
If so, judge whether to there is the middle pressure feed pump run;
If there is no the middle pressure feed pump run carries out, and judges whether the middle pressure feed pump of preliminary election ran more than first scheduled time; If the middle pressure feed pump off-duty of preliminary election or operation, more than first scheduled time, send the instruction of the middle pressure feed pump starting preliminary election;
If the middle pressure feed pump of preliminary election runs exceed described first scheduled time, drum pressure in judgement, is pressed whether to be less than or greater than the first predetermined pressure;
If middle pressure drum pressure is less than the first predetermined pressure, the emptying motor-driven valve of drum in judgement, is pressed whether to open; If the emptying motor-driven valve of middle pressure drum is not opened, send in unlatching the instruction of pressing the emptying motor-driven valve of drum;
If the emptying motor-driven valve of middle pressure drum is opened, steam water-level in judgement, is pressed whether to be less than or greater than the first predetermined water level;
If middle pressure steam water-level is less than the first predetermined water level, in judgement, press drum wall temperature whether to be less than the first predetermined temperature, or judge whether to receive the upper water manual confirmation of permission;
If so, the water filling of drum watering pipeline is pressed whether to complete in judgement; If the water filling of middle pressure drum watering pipeline does not complete, send in open shop the instruction of pressing feed pump to export Electrically operated gate second scheduled time;
If the water filling of middle pressure drum watering pipeline completes, judge whether the middle pressure feed pump outlet Electrically operated gate run is opened, if not, send the instruction of opening the middle pressure feed pump outlet Electrically operated gate run;
If the middle pressure feed pump outlet Electrically operated gate run is opened, press feed pump frequency conversion differential pressure automatically whether to drop in judgement, if not, send in input and press the automatic instruction of feed pump frequency conversion differential pressure;
If middle pressure feed pump frequency conversion differential pressure drops into automatically, press water bypass valve on drum whether to open to predetermined aperture in judgement, and on middle pressure drum, whether water bypass motor-driven valve is opened, and whether middle pressure feed pump interlocking drop into; If not, send and water bypass valve on middle pressure drum is opened to predetermined aperture, and water bypass motor-driven valve on middle pressure drum is opened, and the instruction dropped into that middle pressure feed pump is interlocked;
If water bypass valve is opened to predetermined aperture on middle pressure drum, and on middle pressure drum, water bypass motor-driven valve is opened, and middle pressure feed pump interlocking drops into, presses the water level of drum whether to be greater than described first predetermined water level in judgement;
If the water level of middle pressure drum is greater than described first predetermined water level, water regulating valve water level is pressed in drum bypass automatically whether to drop in judgement and whether the 3rd scheduled time; If not, send made a basket pressure drum on the automatic instruction of water regulating valve water level;
If water regulating valve water level has dropped into and time delay the 3rd scheduled time automatically in the bypass of middle pressure drum, judge whether combustion engine has fire and whether middle pressure drum pressure is greater than described first predetermined pressure;
If combustion engine has fire and middle pressure drum pressure is greater than described first predetermined pressure, press in judgement steam water-level whether between predetermined water level interval and the emptying motor-driven valve of middle pressure drum whether close, if not, sending to make a basket presses water regulating valve water level in drum bypass automatic, and the instruction of the emptying motor-driven valve of Central Shanxi Plain pressure drum.
11. start and stop methods according to claim 10, is characterized in that, described start and stop method also comprises:
Judge whether combustion engine puts out a fire and on middle pressure drum, water bypass adjusts valve whether to close;
If combustion engine is put out a fire and on middle pressure drum, water bypass adjusts valve to close, press feed pump to interlock in judgement and whether exit, if middle pressure feed pump interlocking does not exit, send the instruction exiting middle pressure feed pump interlocking;
If whether middle pressure feed pump interlocking exits, drum feedwater main road control valve and middle pressure drum feed water by-pass control valve is pressed whether to be all switched to manually and to close in judgement, and press feed pump whether all to stop in two, if not, send and stop pressing in two feed pump, whether middle pressure drum feedwater main road control valve and middle pressure drum feed water by-pass control valve are all switched to manually and the instruction of closing;
If middle pressure drum feedwater main road control valve and middle pressure drum feed water by-pass control valve are all switched to manually and close, and press feed pump all to stop in two, judge in two, to press feed pump outlet electric valve whether to close; If not, the instruction of pressing feed pump outlet electric valve in closedown two is sent;
If press feed pump outlet electric valve to close in two, water bypass motor-driven valve on water main road motor-driven valve and middle pressure drum is pressed on drum whether to close in judgement and whether middle pressure reheater desuperheating water motor-driven valve is switched to manually and closes; If not, send in closedown and to press on drum water bypass motor-driven valve on water main road motor-driven valve and middle pressure drum, and middle pressure reheater desuperheating water motor-driven valve is switched to manually and the instruction of closing.
12. start and stop methods according to claim 10, is characterized in that, described setting up procedure runs the condition performed and is: low-pressure drum water level is greater than-1250mm.
13. start and stop methods according to claim 10, is characterized in that, if there is the middle pressure feed pump run, press drum pressure whether to be less than or greater than the first predetermined pressure in judgement.
14. start and stop methods according to claim 10, is characterized in that, if middle pressure drum pressure is greater than the first predetermined pressure, press steam water-level whether to be less than or greater than the first predetermined water level in judgement.
Whether 15. start and stop methods according to claim 10, is characterized in that, if middle pressure steam water-level is greater than the first predetermined water level, press the water filling of drum watering pipeline to complete in judgement.
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