CN104613461A - Low-pressure water supply system for fuel gas thermal power plant and start and stop method thereof - Google Patents
Low-pressure water supply system for fuel gas thermal power plant and start and stop method thereof Download PDFInfo
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- CN104613461A CN104613461A CN201510052561.0A CN201510052561A CN104613461A CN 104613461 A CN104613461 A CN 104613461A CN 201510052561 A CN201510052561 A CN 201510052561A CN 104613461 A CN104613461 A CN 104613461A
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Abstract
The invention provides a low-pressure water supply system for a fuel gas thermal power plant and a start and stop method of the low-pressure water supply system. The low-pressure water supply system for the fuel gas thermal power plant comprises a low-pressure steam drum system and a low-pressure economizer system. The low-pressure steam drum system is connected with the low-pressure economizer system. The low-pressure steam drum system comprises a low-pressure steam drum, a low-pressure steam drum water supply main passage, a low-pressure steam drum water supply by-passage, a low-pressure evaporator and a low-pressure superheater. The low-pressure economizer system comprises a low-pressure economizer, a first low-pressure economizer recirculating pump, a second low-pressure economizer recirculating pump, a low-pressure economizer inlet main passage, a low-pressure economizer outlet main passage and a low-pressure economizer by-passage. By means of the low-pressure water supply system and the start and stop method, automatic start of the low-pressure water supply system is achieved under the state that the low-pressure water supply system for the fuel gas thermal power plant completely stops or partially starts, automatic stop of the low-pressure water supply system is achieved under the operation state, and the original operation state is not affected.
Description
Technical field
The invention relates to gas power station low pressure feed water technology, particularly about a kind of gas power station low pressure feed water system and start and stop method thereof.
Background technology
The major function of existing gas power station low pressure feed water system is at desired value by low-pressure drum water lev el control; Drop into auxiliary steam heating low-pressure drum water temperature to desired value, thus be that on height, middle pressure drum, water extraction supplies preparatory condition; Start low-pressure coal saver recirculation pump, ensure that low-pressure coal saver inlet water temperature is at desired value.But existing gas power station low pressure feed water system cannot under gas power station low pressure feed water system full cut-off state, realize the automatic startup of low pressure feed water system, the automatic stopping of low pressure feed water system cannot be realized under operation, and under the state that cannot start in gas power station low pressure feed water components of system as directed, realize the automatic startup of low pressure feed water system, and do not disturb original running status.
Summary of the invention
Embodiments provide a kind of gas power station low pressure feed water system and starting method thereof, with under gas power station low pressure feed water system full cut-off state or under the state of part startup, realize the automatic startup of low pressure feed water system, and do not disturb original running status.
To achieve these goals, embodiments provide a kind of gas power station low pressure feed water system, described gas power station low pressure feed water system comprises: low-pressure drum system and low-pressure economizer system, and described low-pressure drum system connects described low-pressure economizer system; Wherein,
Described low-pressure drum system comprises: the feedwater of low-pressure drum, low-pressure drum main road, low-pressure drum feed water by-pass, low pressure evaporator and low-pressure superheater; Described low-pressure economizer system comprises: low-pressure coal saver, the first low-pressure coal saver recirculation pump, the second low-pressure coal saver recirculation pump, low-pressure coal saver entrance main road, low-pressure coal saver outlet main road and low-pressure coal saver bypass;
The deoxygenation head of described low-pressure drum is connected to low-pressure coal saver by described low-pressure drum feedwater main road, and the two ends of described low-pressure drum feed water by-pass are connected to the two ends of described low-pressure drum feedwater main road; Entrance and the outlet of described low pressure evaporator are connected to described low-pressure drum respectively; Described low-pressure drum is connected to the entrance of described low-pressure superheater by a low-pressure drum bursting diaphragm, and the outlet of described low-pressure superheater is connected to condenser and steam turbine;
Water from condensate system is connected to described low-pressure coal saver entrance main road and low-pressure coal saver bypass by main condensate Electrically operated gate; The water of described low-pressure coal saver entrance main road enters described low-pressure coal saver, again enters to described low-pressure coal saver entrance main road from described low-pressure coal saver water out after described low-pressure coal saver outlet main road enters the described first low-pressure coal saver recirculation pump pipeline in parallel with the second low-pressure coal saver recirculation pump; Described low-pressure coal saver outlet main road and low-pressure coal saver bypass are connected to low-pressure drum respectively.
In one embodiment, described low-pressure drum system is provided with: low pressure feed water system program control logic button, condensate water water quality ACK button, low-pressure coal saver water filling completes ACK button, auxiliary steam completes ACK button to low-pressure drum heating coil, and standby button thrown by low-pressure drum water temperature ACK button and low-pressure coal saver recirculation pump interlocking.
In one embodiment, described low-pressure drum is connected to auxiliary vapour header by an oral siphon road.
In one embodiment, the pipeline between low-pressure drum feedwater main road and described low-pressure coal saver is provided with a flow-through orifice.
In one embodiment, the pipeline between low-pressure drum feedwater main road and described deoxygenation head is provided with a steam discharge motor-driven valve.
In one embodiment, the outlet of described low-pressure superheater is connected with flow-through orifice and non-return flap.
In one embodiment, the pipeline between the entrance of described low pressure evaporator and described low-pressure drum is provided with a flow-through orifice.
In one embodiment, described low-pressure drum is connected to high pressure water pump and middle pressure feed pump.
In one embodiment, the pipeline between described main condensate Electrically operated gate and described low-pressure coal saver entrance main road and low-pressure coal saver bypass is provided with a flow-through orifice.
In one embodiment, the connecting pipe between the pipeline that described first low-pressure coal saver recirculation pump is in parallel with the second low-pressure coal saver recirculation pump and described low-pressure coal saver entrance main road is provided with a flow-through orifice, a low-pressure coal saver motorized recycling valve and a low-pressure coal saver to recycle and adjust valve.
In one embodiment, the described low-pressure coal saver entrance main road between described flow-through orifice to described connecting pipe is disposed with water on low-pressure coal saver and adjusts water motor-driven valve and low-pressure coal saver bleeding valve on valve, low-pressure coal saver.
To achieve these goals, embodiments provide a kind of gas power station low pressure feed water system start and stop method, described gas power station low pressure feed water system start and stop method comprises: setting up procedure, and described setting up procedure comprises:
Receive the feedback information of combustion engine, judge whether described combustion engine has fire according to described feedback information;
If described combustion engine is without fire, receives the force value of low-pressure drum, and judge whether described force value is greater than the first preset pressure;
If described force value is not more than the first preset pressure, judges the urgent draining valve of low-pressure drum, low pressure evaporator draining valve, whether low-pressure coal saver bypass adjust valve and motor-driven valve all to close, and whether low-pressure drum bursting diaphragm and deoxygenation motor-driven valve are opened all; If not, send the instruction of closing the urgent draining valve of described low-pressure drum, low pressure evaporator draining valve, low-pressure coal saver bypass tune valve and motor-driven valve, and open the instruction of described low-pressure drum bursting diaphragm and deoxygenation motor-driven valve;
If so, judge that low voltage bypass adjusts valve pressure automatically whether to drop into; If described low voltage bypass adjusts valve pressure automatically not drop into, send and drop into the automatic instruction of low voltage bypass tune valve pressure;
If described low voltage bypass adjusts valve pressure automatically to drop into, judge that whether low-pressure drum water level is lower than the first preset water level;
If low-pressure drum water level is lower than the first preset water level, judge whether low-pressure drum feed water by-pass control valve has opened predetermined aperture, and judge that on low-pressure drum feed water by-pass motor-driven valve, low-pressure coal saver, water adjusts water motor-driven valve on valve, low-pressure coal saver, low-pressure coal saver recirculation control valve, low-pressure coal saver recirculation motor-driven valve, first and second low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver bleeding valve whether all to open; If not, send the instruction described low-pressure drum feed water by-pass control valve being opened into predetermined aperture, and the instruction of being adjusted by water on described low-pressure drum feed water by-pass motor-driven valve, low-pressure coal saver water motor-driven valve on valve, low-pressure coal saver, low-pressure coal saver recirculation control valve, low-pressure coal saver recirculation motor-driven valve, first and second low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver bleeding valve to open;
If so, judge whether main condensate Electrically operated gate does not close and whether time delay first scheduled time; If whether described main condensate Electrically operated gate does not close, or described main condensate Electrically operated gate has been closed but time delay does not reach described first scheduled time, sends the instruction of opening described main condensate Electrically operated gate second scheduled time;
If described main condensate Electrically operated gate is not closed and time delay first scheduled time, judge whether the water filling of described low-pressure coal saver entrance pipe completes;
If the water filling of described low-pressure coal saver entrance pipe completes, judge whether described main condensate Electrically operated gate has been opened and whether low-pressure coal saver pipeline bursting diaphragm, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation tune valve, low-pressure coal saver motorized recycling valve close; If not, send out described main condensate Electrically operated gate and close described low-pressure coal saver pipeline bursting diaphragm, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation adjust valve, low-pressure coal saver motorized recycling valve instruction;
If so, judge that whether described low-pressure drum water level is higher than described first preset water level;
If described low-pressure drum water level is higher than described first preset water level, judge that described low-pressure drum feed water by-pass adjusts valve whether to throw water level automatic; If it is automatic that described low-pressure drum feed water by-pass adjusts valve not throw water level, send and adjust valve to throw the automatic instruction of water level described low-pressure drum feed water by-pass;
If described low-pressure drum feed water by-pass adjusts valve to throw automatically, judge whether auxiliary vapour header pressure is greater than the second preset pressure and whether temperature is greater than the first preset temperature;
If so, judge whether described auxiliary vapour header is opened to low-pressure drum pipeline draining valve; If described auxiliary vapour header is not opened to low-pressure drum pipeline draining valve, send and open the instruction of described auxiliary vapour header to low-pressure drum pipeline draining valve;
If described auxiliary vapour header is opened to low-pressure drum pipeline draining valve, judge whether auxiliary vapour header completes to low-pressure drum heating coil;
If auxiliary vapour header completes to low-pressure drum heating coil, judge whether auxiliary steam to low-pressure drum Electrically operated gate has been opened and whether auxiliary steam to low-pressure drum control valve has been opened to the second predetermined aperture; If not, send and open described auxiliary steam to low-pressure drum Electrically operated gate, and described auxiliary steam to low-pressure drum control valve is opened the instruction to described second predetermined aperture;
If so, judge whether auxiliary steam drops into automatically to low-pressure drum control valve temperature, if auxiliary steam does not drop into automatically to low-pressure drum control valve temperature, send and drop into the instruction of auxiliary steam to low-pressure drum control valve temperature automatically to predetermined value;
If auxiliary steam drops into automatically to low-pressure drum control valve temperature, judge whether whether low-pressure drum water temperature be greater than the second predetermined temperature or low-pressure drum water temperature through manual confirmation;
If so, judge whether the low-pressure coal saver recirculation pump of preliminary election runs, if the low-pressure coal saver recirculation pump off-duty of described preliminary election, send the instruction of the low-pressure coal saver recirculation pump starting described preliminary election;
If the low-pressure coal saver recirculation pump of described preliminary election runs, judge that low-pressure coal saver recirculation adjusts valve whether to open the 3rd predetermined aperture, and whether low-pressure coal saver recirculation motor-driven valve is opened; If not, send and adjust valve to be opened into described 3rd predetermined aperture low-pressure coal saver recirculation, and low-pressure coal saver is recycled the instruction of motor-driven valve unlatching;
If so, judge whether low-pressure coal saver recirculation pump interlocking drops into, if low-pressure coal saver recirculation pump interlocking does not drop into, send the instruction dropping into low-pressure coal saver recirculation pump interlocking;
If low-pressure coal saver recirculation pump interlocking drops into, judge whether described combustion engine has fire and whether low-pressure drum pressure is greater than described first preset pressure;
If described combustion engine has fire and low-pressure drum pressure is greater than described first preset pressure, judge whether low-pressure drum feed water by-pass control valve has thrown water level automatic, and low-pressure drum water level is whether in predetermined water level threshold range, and whether low-pressure drum bursting diaphragm closes; If not, send and low-pressure drum feed water by-pass control valve water level is thrown automatically and the instruction of closedown low-pressure drum bursting diaphragm.
In one embodiment, described gas power station low pressure feed water system start and stop method comprises: stop step, described stopping step comprising:
Judge whether described combustion engine has stopped and whether low voltage bypass control valve closes;
If described combustion engine has been stopped and low voltage bypass control valve closes, judge whether low-pressure drum feedwater main road control valve and low-pressure drum feed water by-pass feed-regulating valve have closed and whether have been switched to manually, whether low-pressure drum feedwater main road motor-driven valve and low-pressure drum feed water by-pass feedwater motor-driven valve close; If not, send and close low-pressure drum feedwater main road control valve and low-pressure drum feed water by-pass feed-regulating valve and be switched to manual instruction, and close the instruction of described low-pressure drum feedwater main road motor-driven valve and low-pressure drum feed water by-pass feedwater motor-driven valve;
If low-pressure drum feedwater main road control valve and low-pressure drum feed water by-pass feed-regulating valve have closed and have been switched to manually, and low-pressure drum feedwater main road motor-driven valve and low-pressure drum feed water by-pass feedwater motor-driven valve close, judge that on low-pressure coal saver, water adjusts water motor-driven valve on valve, low-pressure coal saver, valve, low-pressure coal saver bypass motor-driven valve, low-pressure coal saver recirculation pump outlet Electrically operated gate is adjusted in low-pressure coal saver bypass, low-pressure coal saver recirculation regulates and whether low-pressure coal saver recirculation motor-driven valve closes, and whether first and second low-pressure coal saver recirculation pump stops transport;
If not, send water on closedown low-pressure coal saver and adjust water motor-driven valve on valve, low-pressure coal saver, low-pressure coal saver bypass tune valve, low-pressure coal saver bypass motor-driven valve, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation adjustment and low-pressure coal saver recirculation motor-driven valve, and the instruction of stoppage in transit first and second low-pressure coal saver recirculation pump described.
In one embodiment, the condition that described setting up procedure permission runs is:
Arbitrary condensate pump runs and outlet main-piping pressure meets preset pressure; And
Arbitrary enclosed cooling water pump runs and outlet main-piping pressure is greater than 0.45MPa; And
Condensate water water quality meets preassigned.
In one embodiment, the condition that described stopping step permission runs is:
Middle pressure feed pump in waste heat boiler in pressure water supply system is stopped transport; And
High-pressure feed water pump shutdown in waste heat boiler high-pressure feed water system.
In one embodiment, in described setting up procedure, if described combustion engine has fire, judge whether low-pressure drum pressure is greater than described first preset pressure.
In one embodiment, in described setting up procedure, if described force value is greater than described first preset pressure, judge whether low-pressure drum feed water by-pass control valve has thrown water level automatic, and whether low-pressure drum water level is in predetermined water level threshold range, and whether low-pressure drum bursting diaphragm closes.
The beneficial effect of the embodiment of the present invention is, pass through the present invention, can under gas power station low pressure feed water system full cut-off state, realize the automatic startup of low pressure feed water system, realize the automatic stopping of low pressure feed water system under operation, and under the state that gas power station low pressure feed water components of system as directed starts, realize the automatic startup of low pressure feed water system, 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 low-pressure drum system of the embodiment of the present invention;
Fig. 2 is the structural representation of the low-pressure economizer system of the embodiment of the present invention;
Fig. 3 A and Fig. 3 B is the setting up procedure flow chart of the gas power station low pressure feed water system start and stop method of the embodiment of the present invention;
Fig. 4 is the stopping flow chart of steps of the gas power station low pressure feed water system start and stop method 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 a kind of gas power station low pressure feed water system, and described gas power station low pressure feed water system comprises: low-pressure drum system and low-pressure economizer system, and described low-pressure drum system connects described low-pressure economizer system.
As shown in Figure 1, described low-pressure drum system comprises: the feedwater of low-pressure drum 1, low-pressure drum main road 2, low-pressure drum feed water by-pass 3, low pressure evaporator 4 and low-pressure superheater 5.
The deoxygenation of low-pressure drum 16 is connected to low-pressure coal saver 35 by low-pressure drum feedwater main road 2, and the two ends of low-pressure drum feed water by-pass 3 are connected to the two ends of low-pressure drum feedwater main road 2; Entrance and the outlet of described low pressure evaporator 4 are connected to described low-pressure drum 1 respectively, and wherein, low-pressure drum 1 connects the pipeline of the entrance of low pressure evaporator 4 by filter screen 24; Described low-pressure drum 1 is connected to the entrance of described low-pressure superheater 5 by a low-pressure drum bursting diaphragm 7, the outlet of described low-pressure superheater 5 is connected to condenser and steam turbine (low pressure main steam), and on the pipeline removing condenser, be provided with low voltage bypass tune valve 19.
As shown in Figure 1, in described low-pressure drum system, be provided with: low pressure feed water system program control logic button a1, condensate water water quality ACK button a2, low-pressure coal saver water filling completes ACK button a3, auxiliary steam completes ACK button a4 to low-pressure drum heating coil, and standby button a6 thrown by low-pressure drum water temperature ACK button a5 and low-pressure coal saver recirculation pump interlocking.
As described in Figure 1, described low-pressure drum 1 is connected to auxiliary vapour header (see carrying out auxiliary steam in Fig. 1) by an outlet pipeline 8, and above-mentioned control valve 30, motor-driven valve 31, the auxiliary vapour header of being provided with in oral siphon road 8 is to low-pressure drum pipeline draining valve 32, auxiliary vapour header to low-pressure drum pipeline draining valve 33 and non-return flap 34.Pipeline 9 between low-pressure drum feedwater main road 2 and described low-pressure coal saver 35 is provided with a flow-through orifice 10.Pipeline 11 between low-pressure drum feedwater main road 2 and described deoxygenation 6 is provided with a steam discharge motor-driven valve 12, and described deoxygenation 6 also connects deoxygenation motor-driven valve 27.Low-pressure drum feedwater main road 2 is provided with low-pressure drum feedwater main road control valve 13 and low-pressure drum feedwater main road motor-driven valve 14, and low-pressure drum feed water by-pass 3 is provided with low-pressure drum feed water by-pass feed-regulating valve 15 and low-pressure drum feed water by-pass feedwater motor-driven valve 16.The outlet of described low-pressure superheater 5 is connected with flow-through orifice 17 and non-return flap 18.Pipeline 20 between the entrance of described low pressure evaporator 4 and described low-pressure drum 1 is provided with a flow-through orifice 21, low pressure evaporator draining valve 22 and low pressure evaporator draining valve 23.In addition, described low-pressure drum is connected to high pressure water pump, middle pressure feed pump, low-pressure drum safety door 25, low-pressure drum safety door 26, the urgent draining valve of low-pressure drum 28, the urgent draining valve 29 of low-pressure drum.Also have a lot of valve and pipeline in low-pressure drum system shown in Fig. 1, be the element that this area is conventional, repeat no more.
As shown in Figure 2, described low-pressure economizer system comprises: low-pressure coal saver 35, first low-pressure coal saver recirculation pump 36, second low-pressure coal saver recirculation pump 37, low-pressure coal saver entrance main road 38, low-pressure coal saver outlet main road 39 and low-pressure coal saver bypass 40.
Water from condensate system is connected to described low-pressure coal saver entrance main road 38 and low-pressure coal saver bypass 40 by non-return flap 55 and main condensate Electrically operated gate 56; The water of described low-pressure coal saver entrance main road 38 enters described low-pressure coal saver 35, and the water going out to flow out from described low-pressure coal saver 35 again enters to described low-pressure coal saver entrance main road 38 after described low-pressure coal saver outlet main road 39 enters described first low-pressure coal saver recirculation pump 36 pipeline in parallel with the second low-pressure coal saver recirculation pump 37; Described low-pressure coal saver outlet main road 39 and low-pressure coal saver bypass 40 are connected to low-pressure drum respectively.Described first low-pressure coal saver recirculation pump 36 pipeline in parallel with the second low-pressure coal saver recirculation pump 37 comprises the first low-pressure coal saver recirculation pump branch line 41 and the second low-pressure coal saver recirculation pump branch line 42, and the first low-pressure coal saver recirculation pump branch line 41 is provided with the first low-pressure coal saver recirculation pump outlet Electrically operated gate 43, non-return flap 44, filter screen 45, isolating valve 46, isolating valve 47 and inlet valve 48, second low-pressure coal saver recirculation pump branch line 42 is provided with the first low-pressure coal saver recirculation pump outlet Electrically operated gate 49, non-return flap 50, filter screen 51, isolating valve 52, isolating valve 53 and inlet valve 54.
In addition, the pipeline between described main condensate Electrically operated gate 56 and described low-pressure coal saver entrance main road 38 and low-pressure coal saver bypass 40 is provided with a flow-through orifice 57.Connecting pipe 58 between the pipeline that described first low-pressure coal saver recirculation pump 36 is in parallel with the second low-pressure coal saver recirculation pump 37 and described low-pressure coal saver entrance main road 38 is provided with flow-through orifice 59, low-pressure coal saver motorized recycling valve 60 and a low-pressure coal saver to recycle and adjust valve 61.Described low-pressure coal saver entrance main road 38 between described flow-through orifice 57 to described connecting pipe 58 is disposed with water on low-pressure coal saver and adjusts water motor-driven valve 63 and low-pressure coal saver bleeding valve 64 on valve 62, low-pressure coal saver.Low-pressure coal saver bypass 40 is provided with low-pressure coal saver bypass and adjusts valve 65 and low-pressure coal saver bypass motor-driven valve 66.Also have a lot of valve and pipeline in low-pressure economizer system shown in Fig. 2, be the element that this area is conventional, repeat no more.
In Fig. 1 and Fig. 2, the effect of low-pressure drum 1 receives the condensate water from low-pressure coal saver 35, and provide feedwater paramount, middle pressure drum as reservoir vessel; Additionally by auxiliary steam heating low-pressure drum 1, to ensure on high, middle pressure drum that coolant-temperature gage also plays deoxygenation function while suitable.
The function of the first low-pressure coal saver recirculation pump 36 and the second low-pressure coal saver recirculation pump 37 is the condensate water waters driving a part of condensate water through the higher temperature of low-pressure coal saver 35 to remove to heat lower temperature, and before ensureing low-pressure coal saver, condensing water temperature is at desired value.Low pressure feed water pipeline 11 there is water on two-way adjust valve and motor-driven valve, low-pressure drum main road 2 upper hose footpath is larger, bypass upper hose footpath is less, uses water in bypass to adjust valve to control flow and is more suitable for, and therefore in low-pressure drum bypass 3, water adjusts valve in programmed logic, be used for water and throw water level and automatically control.Auxiliary steam confession low-pressure drum tune valve (control valve 30 on oral siphon road 8, motor-driven valve 31) is used to control low-pressure drum water temperature.Condensate water is heated through low-pressure economizer system, sub-fraction to be driven by the first low-pressure coal saver recirculation pump 36 and the second low-pressure coal saver recirculation pump 37 by the condensate water after heating and goes heat-setting water water, and most of condensate water water in low pressure feed water bypass adjusts valve and motor-driven valve to be sent to low-pressure drum; Auxiliary steam enters low-pressure drum 1 through control valve and motor-driven valve and heats low pressure feed water, also ensure that to the temperature of water on height, middle pressure drum while deoxygenation; The feedwater of low-pressure drum 1 is constantly heated to form steam by low pressure evaporator 4 and returns low-pressure drum 1, and the steam in low-pressure drum is heated to form superheated steam through low-pressure superheater and is supplied to turbine low pressure cylinder acting.
As shown in Fig. 3 A and Fig. 3 B, the embodiment of the present invention provides a kind of gas power station low pressure feed water system start and stop method, and described gas power station low pressure feed water system start and stop method comprises: setting up procedure, and described setting up procedure comprises:
S301: the feedback information receiving combustion engine;
S302: judge whether described combustion engine has fire according to described feedback information;
S303: if described combustion engine is without fire, receives the force value of low-pressure drum, and judges whether described force value is greater than the first preset pressure; In one embodiment, the first preset pressure is 0.1MPa.
If described force value is not more than the first preset pressure, carry out S304.
S304: judge the urgent draining valve of low-pressure drum, low pressure evaporator draining valve, whether low-pressure coal saver bypass adjust valve and motor-driven valve all to close, and whether low-pressure drum bursting diaphragm and deoxygenation motor-driven valve are opened all; If not, carry out S305, send the instruction of closing the urgent draining valve of described low-pressure drum, low pressure evaporator draining valve, low-pressure coal saver bypass tune valve and motor-driven valve, and open the instruction of described low-pressure drum bursting diaphragm and deoxygenation motor-driven valve, to close the urgent draining valve of low-pressure drum, low pressure evaporator draining valve, low-pressure coal saver bypass tune valve and motor-driven valve, and open low-pressure drum bursting diaphragm and deoxygenation motor-driven valve.
If the urgent draining valve of low-pressure drum, low pressure evaporator draining valve, low-pressure coal saver bypass adjust valve and motor-driven valve all to close, and low-pressure drum bursting diaphragm and deoxygenation motor-driven valve have driven row S306 all into.
S306: judge that low voltage bypass adjusts valve pressure automatically whether to drop into; If described low voltage bypass adjusts valve pressure automatically not drop into, carry out S307, send and drop into the automatic instruction of low voltage bypass tune valve pressure;
If described low voltage bypass adjusts valve pressure automatically to drop into, carry out S308.
S308: judge that whether low-pressure drum water level is lower than the first preset water level; In one embodiment, this first preset water level is-1000mm, and the present invention is not as limit.
If low-pressure drum water level is lower than the first preset water level, carry out S309.
S309: judge whether low-pressure drum feed water by-pass control valve has opened predetermined aperture, and judge that on low-pressure drum feed water by-pass motor-driven valve, low-pressure coal saver, water adjusts water motor-driven valve on valve, low-pressure coal saver, low-pressure coal saver recirculation control valve, low-pressure coal saver recirculation motor-driven valve, first and second low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver bleeding valve whether all to open.In one embodiment, this predetermined aperture is 25%, and the present invention is not as limit.
If it is no for existing one or more in the feedback judged result of S309, carry out S310, send the instruction described low-pressure drum feed water by-pass control valve being opened into predetermined aperture, and by described low-pressure drum feed water by-pass motor-driven valve, on low-pressure coal saver, water adjusts valve, water motor-driven valve on low-pressure coal saver, low-pressure coal saver recirculation control valve, low-pressure coal saver recirculation motor-driven valve, first and second low-pressure coal saver recirculation pump outlet Electrically operated gate, the instruction that low-pressure coal saver bleeding valve (foregoing invention is called for short first-phase closing valve) is opened, so that described low-pressure drum feed water by-pass control valve is opened into predetermined aperture, by described low-pressure drum feed water by-pass motor-driven valve, on low-pressure coal saver, water adjusts valve, water motor-driven valve on low-pressure coal saver, low-pressure coal saver recirculation control valve, low-pressure coal saver recirculation motor-driven valve, first and second low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver bleeding valve is opened.
If predetermined aperture opened by low-pressure drum feed water by-pass control valve, and on low-pressure drum feed water by-pass motor-driven valve, low-pressure coal saver, water adjusts water motor-driven valve on valve, low-pressure coal saver, low-pressure coal saver recirculation control valve, low-pressure coal saver recirculation motor-driven valve, first and second low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver bleeding valve all to drive row S311 into.
S311: judge whether main condensate Electrically operated gate does not close and whether time delay first scheduled time; If whether described main condensate Electrically operated gate does not close, or described main condensate Electrically operated gate has been closed but time delay does not reach described first scheduled time, carry out S312, send the instruction of opening described main condensate Electrically operated gate second scheduled time, opened described main condensate Electrically operated gate second scheduled time, in one embodiment, this first scheduled time is 120 seconds, this second scheduled time is 5 seconds, and the present invention is not as limit.
If described main condensate Electrically operated gate is not closed and time delay first scheduled time, carry out S313.
S313: judge whether the water filling of described low-pressure coal saver entrance pipe completes;
If the water filling of described low-pressure coal saver entrance pipe completes, carry out S314.Combine artificial judgment herein.When operations staff observe the exhaust of low-pressure coal saver pipeline bursting diaphragm terminate and continuously water breakthrough time, pipeline water filling can be clicked and complete ACK button, continue next step (S314).
S314: judge whether described main condensate Electrically operated gate has been opened and whether low-pressure coal saver pipeline bursting diaphragm, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation tune valve, low-pressure coal saver motorized recycling valve (above-mentioned low-pressure coal saver pipeline bursting diaphragm, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation adjust valve, low-pressure coal saver motorized recycling valve to be called for short second-phase closing valve) close.
If in the judged result of S314, there is negative decision, carry out S315, send out described main condensate Electrically operated gate and close described low-pressure coal saver pipeline bursting diaphragm, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation adjust valve, low-pressure coal saver motorized recycling valve instruction, to open main condensate Electrically operated gate, and close low-pressure coal saver pipeline bursting diaphragm, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation tune valve, low-pressure coal saver motorized recycling valve.
If described main condensate Electrically operated gate has opened and low-pressure coal saver pipeline bursting diaphragm, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation tune valve, low-pressure coal saver motorized recycling valve have closed and carried out S316.
S316: judge that whether described low-pressure drum water level is higher than described first preset water level;
If described low-pressure drum water level, higher than described first preset water level, carries out S317.
S317: judge that described low-pressure drum feed water by-pass adjusts valve whether to throw water level automatic; If it is automatic that described low-pressure drum feed water by-pass adjusts valve not throw water level, carry out S318, send and adjust valve to throw the automatic instruction of water level described low-pressure drum feed water by-pass, valve is adjusted to throw water level described low-pressure drum feed water by-pass automatic, in one embodiment, low-pressure drum feed water by-pass can be adjusted valve throw water level automatically to-400mm.
If described low-pressure drum feed water by-pass adjusts valve to throw automatically, carry out the S319 of Fig. 3 B.
S319: judge whether auxiliary vapour header pressure is greater than the second preset pressure and whether temperature is greater than the first preset temperature;
If auxiliary vapour header pressure is greater than the second preset pressure and temperature is greater than the first preset temperature, carry out S320.In one embodiment, the second preset pressure is 0.8MPa, and the first preset temperature is 280 degree.
S320: judge whether described auxiliary vapour header is opened to low-pressure drum pipeline draining valve (auxiliary vapour header is to low-pressure drum pipeline draining valve 32 and auxiliary vapour header to low-pressure drum pipeline draining valve 33); If described auxiliary vapour header is not opened to low-pressure drum pipeline draining valve, carry out S321, send and open the instruction of described auxiliary vapour header to low-pressure drum pipeline draining valve, to open described auxiliary vapour header to low-pressure drum pipeline draining valve.
If described auxiliary vapour header is opened to low-pressure drum pipeline draining valve, carry out S322.
S322: judge whether auxiliary vapour header completes to low-pressure drum heating coil;
If auxiliary vapour header completes to low-pressure drum heating coil, carry out S323.Combine artificial judgment herein, when operations staff judges that auxiliary steam to low-pressure coal saver hydrophobic pipeline is shown in vapour continuously and is not with water, heating coil can be clicked and complete ACK button, continue next step (S323).
S323: judge whether auxiliary steam to low-pressure drum Electrically operated gate has been opened and whether auxiliary steam to low-pressure drum control valve has been opened to the second predetermined aperture; If not, carry out S324, send and open described auxiliary steam to low-pressure drum Electrically operated gate, and the instruction of described auxiliary steam to low-pressure drum control valve being opened to described second predetermined aperture, to open described auxiliary steam to low-pressure drum Electrically operated gate, and described auxiliary steam to low-pressure drum control valve is opened to described second predetermined aperture.In one embodiment, the second predetermined aperture is 5%.
If auxiliary steam to low-pressure drum Electrically operated gate has been opened and auxiliary steam to low-pressure drum control valve is out, to the second predetermined aperture, to carry out S324.
S324: judge whether auxiliary steam drops into automatically to low-pressure drum control valve temperature, if auxiliary steam does not drop into automatically to low-pressure drum control valve temperature, carry out S325, send and drop into the instruction of auxiliary steam to low-pressure drum control valve temperature automatically to predetermined value, to drop into auxiliary steam to low-pressure drum control valve temperature automatically to predetermined value, in one embodiment, this predetermined value can be 80 degree.
If auxiliary steam drops into automatically to low-pressure drum control valve temperature, carry out S326.
S326: judge whether whether low-pressure drum water temperature be greater than the second predetermined temperature or low-pressure drum water temperature through manual confirmation.In one embodiment, the second predetermined temperature is 75 DEG C.This step is the step that low-pressure drum water temperature is determined, has also got involved artificial judgment while automatic decision.If low-pressure drum water temperature has been greater than 75 degree, then automatically continue next step; If be less than 75 degree, power plant operations staff can according to the temperature difference of the wall temperature of high, middle pressure drum and low-pressure drum water temperature at present, judge whether to water on height, middle pressure drum, namely whether can carry out the program control input action of next step height, middle pressure water supply system.
If low-pressure drum water temperature is greater than the second predetermined temperature or low-pressure drum water temperature through manual confirmation, carry out S327.
S327: judge whether the low-pressure coal saver recirculation pump of preliminary election runs, if the low-pressure coal saver recirculation pump off-duty of described preliminary election, carry out S328, send the instruction of the low-pressure coal saver recirculation pump starting described preliminary election, to start the low-pressure coal saver recirculation pump of described preliminary election.Gas power station low pressure feed water Operation system setting of the present invention has low-pressure coal saver recirculation pump to interlock to throw standby button, this step axle, by clicking this button, and can the first low-pressure coal saver recirculation pump 36 and the second low-pressure coal saver recirculation pump 37 in advance.
If the low-pressure coal saver recirculation pump of described preliminary election runs, carry out S329.
S329: judge that low-pressure coal saver recirculation adjusts valve whether to open the 3rd predetermined aperture, and whether low-pressure coal saver recirculation motor-driven valve is opened; If low-pressure coal saver recirculation is adjusted do not opened the 3rd predetermined aperture, carry out S330, send and adjust valve to be opened into described 3rd predetermined aperture low-pressure coal saver recirculation, and low-pressure coal saver is recycled the instruction of motor-driven valve unlatching.In one embodiment, the 3rd predetermined aperture is 10%.
If low-pressure coal saver recirculation adjusts valve to open the 3rd predetermined aperture, carry out S331.
S331: judge whether low-pressure coal saver recirculation pump interlocking drops into, if low-pressure coal saver recirculation pump interlocking does not drop into, enter S332, send the instruction dropping into low-pressure coal saver recirculation pump interlocking, to drop into low-pressure coal saver recirculation pump interlocking.
If low-pressure coal saver recirculation pump interlocking drops into, carry out S333.
S333: judge whether described combustion engine has fire and whether low-pressure drum pressure is greater than described first preset pressure.
If described combustion engine has fire and low-pressure drum pressure is greater than described first preset pressure, carry out S334.
S334: judge whether low-pressure drum feed water by-pass control valve has been thrown water level and automatically (can have been thrown water level automatically to setting value, as 0mm), and whether low-pressure drum water level is in predetermined water level threshold value (predetermined water level threshold value can be such as-50 ~ 50mm) scope, and whether low-pressure drum bursting diaphragm closes; If not, carry out S335, send and low-pressure drum feed water by-pass control valve water level is thrown automatically and the instruction of closedown low-pressure drum bursting diaphragm, low-pressure drum feed water by-pass control valve water level is thrown automatically and closes low-pressure drum bursting diaphragm.
As shown in Figure 4, in one embodiment, described gas power station low pressure feed water system start and stop method comprises: stop step, this stopping step comprising:
S401: judge whether described combustion engine has stopped and whether low voltage bypass control valve closes;
If described combustion engine has been stopped and low voltage bypass control valve closes, carry out S402.
S402: judge whether low-pressure drum feedwater main road control valve and low-pressure drum feed water by-pass feed-regulating valve have closed and whether have been switched to manually, whether low-pressure drum feedwater main road motor-driven valve and low-pressure drum feedwater low-pressure drum feed water by-pass feedwater motor-driven valve close; If not, carry out S403, send and close low-pressure drum feedwater main road control valve and low-pressure drum feed water by-pass feed-regulating valve and be switched to manual instruction, and close the instruction of described low-pressure drum feedwater main road motor-driven valve and low-pressure drum feedwater low-pressure drum feed water by-pass feedwater motor-driven valve, to close low-pressure drum feedwater main road control valve and low-pressure drum feed water by-pass feed-regulating valve and to be switched to manually, and close described low-pressure drum feedwater main road motor-driven valve and low-pressure drum feedwater low-pressure drum feed water by-pass feedwater motor-driven valve.
If low-pressure drum feedwater main road control valve and low-pressure drum feed water by-pass feed-regulating valve have closed and be switched to manually, and low-pressure drum feedwater main road motor-driven valve and low-pressure drum feedwater low-pressure drum feed water by-pass feedwater motor-driven valve close, carry out S404.
S404: judge that on low-pressure coal saver, water adjusts water motor-driven valve on valve, low-pressure coal saver, valve, low-pressure coal saver bypass motor-driven valve, low-pressure coal saver recirculation pump outlet Electrically operated gate is adjusted in low-pressure coal saver bypass (the first low-pressure coal saver recirculation pump outlet Electrically operated gate 43 and the second low-pressure coal saver recirculation pump outlet Electrically operated gate 49), low-pressure coal saver recirculation regulates and whether low-pressure coal saver recirculation motor-driven valve closes, and whether the first low-pressure coal saver recirculation pump and the second low-pressure coal saver recirculation pump stop transport.
If not, enter S405, send and close water tune valve on low-pressure coal saver, water motor-driven valve on low-pressure coal saver, valve is adjusted in low-pressure coal saver bypass, low-pressure coal saver bypass motor-driven valve, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation regulates and low-pressure coal saver recirculation motor-driven valve, and the instruction of first and second low-pressure coal saver recirculation pump described of stopping transport, valve is adjusted to close water on low-pressure coal saver, water motor-driven valve on low-pressure coal saver, valve is adjusted in low-pressure coal saver bypass, low-pressure coal saver bypass motor-driven valve, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation regulates and low-pressure coal saver recirculation motor-driven valve, and first and second low-pressure coal saver recirculation pump described of stopping transport.
During concrete enforcement, the condition that Fig. 3 A and the permission of the setting up procedure shown in Fig. 3 B run is:
Arbitrary condensate pump runs and outlet main-piping pressure meets preset pressure (in one embodiment, this preset pressure is 2.5MPa); And
Arbitrary enclosed cooling water pump runs and outlet main-piping pressure is greater than 0.45MPa; And
Condensate water water quality meets preassigned, and this standard is determined according to concrete operating mode.
During concrete enforcement, the condition that the stopping step permission shown in Fig. 4 runs is:
Middle pressure feed pump (press in #1 in feed pump and #2 and press feed pump) in waste heat boiler in pressure water supply system is stopped transport; And
High pressure water pump (#1 high pressure water pump and #2 high pressure water pump) in waste heat boiler high-pressure feed water system is stopped transport.
In one embodiment, if judge in the S302 of Fig. 3 A that described combustion engine has fire, carries out S333, judge whether low-pressure drum pressure is greater than described first preset pressure.This avoid the original running status of interference gas power station low pressure feed water system, it also avoid the repeated priming work of low pressure feed water system.
In one embodiment, in described setting up procedure, if S303 judges that described force value is greater than the first preset pressure, carry out S334: judge whether low-pressure drum feed water by-pass control valve has thrown water level automatic, and whether low-pressure drum water level is in predetermined water level threshold range, and whether low-pressure drum bursting diaphragm closes.This step considers low-pressure drum and has been in hot situation, and therefore this step avoids the original running status of interference gas power station low pressure feed water system, it also avoid the repeated priming work of gas power station low pressure feed water system.
In S308, if judge that low-pressure drum water level is higher than the first preset water level, carries out S317, judge that described low-pressure drum feed water by-pass adjusts valve whether to throw water level automatic.This step considers the situation that low-pressure drum water level has reached desired value, and therefore this step avoids the original running status of interference low pressure feed water system, and the water conservancy project that repeats that it also avoid low pressure feed water system is done.
In the start and stop method of the gas power station low pressure feed water system of the embodiment of the present invention, (programed logic) proceeds to a certain step, and 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 receive this feedback signal, continues performing a programme control logic.
The start and stop method (programed logic starts step sequence) of this gas power station low pressure feed water system can drop into low-pressure coal saver recirculation pump interlocking automatically, and this is embodied in S331 and S332 starting step sequence.After low-pressure coal saver recirculation pump interlocking drops into, when the female pipe feed temperature of low-pressure coal saver entrance is lower than certain definite value; Or when having arbitrary low-pressure coal saver recirculation pump to trip, all can another low-pressure coal saver recirculation pump of interlocked startup, thus ensure that the female pipe feed temperature of low-pressure coal saver entrance is normal.
Pass through the present invention, can under gas power station low pressure feed water system full cut-off state, realize the automatic startup of low pressure feed water system, realize the automatic stopping of low pressure feed water system under operation, and under the state that gas power station low pressure feed water components of system as directed starts, realize the automatic startup of low pressure feed water system, and do not disturb original running status.
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 (17)
1. a gas power station low pressure feed water system, is characterized in that, described gas power station low pressure feed water system comprises: low-pressure drum system and low-pressure economizer system, and described low-pressure drum system connects described low-pressure economizer system; Wherein,
Described low-pressure drum system comprises: the feedwater of low-pressure drum, low-pressure drum main road, low-pressure drum feed water by-pass, low pressure evaporator and low-pressure superheater; Described low-pressure economizer system comprises: low-pressure coal saver, the first low-pressure coal saver recirculation pump, the second low-pressure coal saver recirculation pump, low-pressure coal saver entrance main road, low-pressure coal saver outlet main road and low-pressure coal saver bypass;
The deoxygenation head of described low-pressure drum is connected to low-pressure coal saver by described low-pressure drum feedwater main road, and the two ends of described low-pressure drum feed water by-pass are connected to the two ends of described low-pressure drum feedwater main road; Entrance and the outlet of described low pressure evaporator are connected to described low-pressure drum respectively; Described low-pressure drum is connected to the entrance of described low-pressure superheater by a low-pressure drum bursting diaphragm, and the outlet of described low-pressure superheater is connected to condenser and steam turbine;
Water from condensate system is connected to described low-pressure coal saver entrance main road and low-pressure coal saver bypass by main condensate Electrically operated gate; The water of described low-pressure coal saver entrance main road enters described low-pressure coal saver, again enters to described low-pressure coal saver entrance main road from described low-pressure coal saver water out after described low-pressure coal saver outlet main road enters the described first low-pressure coal saver recirculation pump pipeline in parallel with the second low-pressure coal saver recirculation pump; Described low-pressure coal saver outlet main road and low-pressure coal saver bypass are connected to low-pressure drum respectively.
2. gas power station low pressure feed water system according to claim 1, it is characterized in that, described low-pressure drum system is provided with: low pressure feed water system program control logic button, condensate water water quality ACK button, low-pressure coal saver water filling completes ACK button, auxiliary steam completes ACK button to low-pressure drum heating coil, and standby button thrown by low-pressure drum water temperature ACK button and low-pressure coal saver recirculation pump interlocking.
3. gas power station low pressure feed water system according to claim 1, is characterized in that, described low-pressure drum is connected to auxiliary vapour header by an oral siphon road.
4. gas power station low pressure feed water system according to claim 1, is characterized in that, the pipeline between low-pressure drum feedwater main road and described low-pressure coal saver is provided with a flow-through orifice.
5. gas power station low pressure feed water system according to claim 1, is characterized in that, the pipeline between low-pressure drum feedwater main road and described deoxygenation head is provided with a steam discharge motor-driven valve.
6. gas power station low pressure feed water system according to claim 1, is characterized in that, the outlet of described low-pressure superheater is connected with flow-through orifice and non-return flap.
7. gas power station low pressure feed water system according to claim 1, is characterized in that, the pipeline between the entrance of described low pressure evaporator and described low-pressure drum is provided with a flow-through orifice.
8. gas power station low pressure feed water system according to claim 1, is characterized in that, described low-pressure drum is connected to high pressure water pump and middle pressure feed pump.
9. gas power station low pressure feed water system according to claim 1, is characterized in that, the pipeline between described main condensate Electrically operated gate and described low-pressure coal saver entrance main road and low-pressure coal saver bypass is provided with a flow-through orifice.
10. gas power station low pressure feed water system according to claim 9, it is characterized in that, the connecting pipe between the pipeline that described first low-pressure coal saver recirculation pump is in parallel with the second low-pressure coal saver recirculation pump and described low-pressure coal saver entrance main road is provided with a flow-through orifice, a low-pressure coal saver motorized recycling valve and a low-pressure coal saver and recycles and adjust valve.
11. gas power station low pressure feed water systems according to claim 9, it is characterized in that, the described low-pressure coal saver entrance main road between described flow-through orifice to described connecting pipe is disposed with water on low-pressure coal saver and adjusts water motor-driven valve and low-pressure coal saver bleeding valve on valve, low-pressure coal saver.
12. 1 kinds of gas power station low pressure feed water system start and stop methods, it is characterized in that, described gas power station low pressure feed water system start and stop method comprises: setting up procedure, and described setting up procedure comprises:
Receive the feedback information of combustion engine, judge whether described combustion engine has fire according to described feedback information;
If described combustion engine is without fire, receives the force value of low-pressure drum, and judge whether described force value is greater than the first preset pressure;
If described force value is not more than the first preset pressure, judges the urgent draining valve of low-pressure drum, low pressure evaporator draining valve, whether low-pressure coal saver bypass adjust valve and motor-driven valve all to close, and whether low-pressure drum bursting diaphragm and deoxygenation motor-driven valve are opened all; If not, send the instruction of closing the urgent draining valve of described low-pressure drum, low pressure evaporator draining valve, low-pressure coal saver bypass tune valve and motor-driven valve, and open the instruction of described low-pressure drum bursting diaphragm and deoxygenation motor-driven valve;
If so, judge that low voltage bypass adjusts valve pressure automatically whether to drop into; If described low voltage bypass adjusts valve pressure automatically not drop into, send and drop into the automatic instruction of low voltage bypass tune valve pressure;
If described low voltage bypass adjusts valve pressure automatically to drop into, judge that whether low-pressure drum water level is lower than the first preset water level;
If low-pressure drum water level is lower than the first preset water level, judge whether low-pressure drum feed water by-pass control valve has opened predetermined aperture, and judge that on low-pressure drum feed water by-pass motor-driven valve, low-pressure coal saver, water adjusts water motor-driven valve on valve, low-pressure coal saver, low-pressure coal saver recirculation control valve, low-pressure coal saver recirculation motor-driven valve, first and second low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver bleeding valve whether all to open; If not, send the instruction described low-pressure drum feed water by-pass control valve being opened into predetermined aperture, and the instruction of being adjusted by water on described low-pressure drum feed water by-pass motor-driven valve, low-pressure coal saver water motor-driven valve on valve, low-pressure coal saver, low-pressure coal saver recirculation control valve, low-pressure coal saver recirculation motor-driven valve, first and second low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver bleeding valve to open;
If so, judge whether main condensate Electrically operated gate does not close and whether time delay first scheduled time; If whether described main condensate Electrically operated gate does not close, or described main condensate Electrically operated gate has been closed but time delay does not reach described first scheduled time, sends the instruction of opening described main condensate Electrically operated gate second scheduled time;
If described main condensate Electrically operated gate is not closed and time delay first scheduled time, judge whether the water filling of described low-pressure coal saver entrance pipe completes;
If the water filling of described low-pressure coal saver entrance pipe completes, judge whether described main condensate Electrically operated gate has been opened and whether low-pressure coal saver pipeline bursting diaphragm, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation tune valve, low-pressure coal saver motorized recycling valve close; If not, send out described main condensate Electrically operated gate and close described low-pressure coal saver pipeline bursting diaphragm, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation adjust valve, low-pressure coal saver motorized recycling valve instruction;
If so, judge that whether described low-pressure drum water level is higher than described first preset water level;
If described low-pressure drum water level is higher than described first preset water level, judge that described low-pressure drum feed water by-pass adjusts valve whether to throw water level automatic; If it is automatic that described low-pressure drum feed water by-pass adjusts valve not throw water level, send and adjust valve to throw the automatic instruction of water level described low-pressure drum feed water by-pass;
If described low-pressure drum feed water by-pass adjusts valve to throw automatically, judge whether auxiliary vapour header pressure is greater than the second preset pressure and whether temperature is greater than the first preset temperature;
If so, judge whether described auxiliary vapour header is opened to low-pressure drum pipeline draining valve; If described auxiliary vapour header is not opened to low-pressure drum pipeline draining valve, send and open the instruction of described auxiliary vapour header to low-pressure drum pipeline draining valve;
If described auxiliary vapour header is opened to low-pressure drum pipeline draining valve, judge whether auxiliary vapour header completes to low-pressure drum heating coil;
If auxiliary vapour header completes to low-pressure drum heating coil, judge whether auxiliary steam to low-pressure drum Electrically operated gate has been opened and whether auxiliary steam to low-pressure drum control valve has been opened to the second predetermined aperture; If not, send and open described auxiliary steam to low-pressure drum Electrically operated gate, and described auxiliary steam to low-pressure drum control valve is opened the instruction to described second predetermined aperture;
If so, judge whether auxiliary steam drops into automatically to low-pressure drum control valve temperature, if auxiliary steam does not drop into automatically to low-pressure drum control valve temperature, send and drop into the instruction of auxiliary steam to low-pressure drum control valve temperature automatically to predetermined value;
If auxiliary steam drops into automatically to low-pressure drum control valve temperature, judge whether whether low-pressure drum water temperature be greater than the second predetermined temperature or low-pressure drum water temperature through manual confirmation;
If so, judge whether the low-pressure coal saver recirculation pump of preliminary election runs, if the low-pressure coal saver recirculation pump off-duty of described preliminary election, send the instruction of the low-pressure coal saver recirculation pump starting described preliminary election;
If the low-pressure coal saver recirculation pump of described preliminary election runs, judge that low-pressure coal saver recirculation adjusts valve whether to open the 3rd predetermined aperture, and whether low-pressure coal saver recirculation motor-driven valve is opened; If not, send and adjust valve to be opened into described 3rd predetermined aperture low-pressure coal saver recirculation, and low-pressure coal saver is recycled the instruction of motor-driven valve unlatching;
If so, judge whether low-pressure coal saver recirculation pump interlocking drops into, if low-pressure coal saver recirculation pump interlocking does not drop into, send the instruction dropping into low-pressure coal saver recirculation pump interlocking;
If low-pressure coal saver recirculation pump interlocking drops into, judge whether described combustion engine has fire and whether low-pressure drum pressure is greater than described first preset pressure;
If described combustion engine has fire and low-pressure drum pressure is greater than described first preset pressure, judge whether low-pressure drum feed water by-pass control valve has thrown water level automatic, and low-pressure drum water level is whether in predetermined water level threshold range, and whether low-pressure drum bursting diaphragm closes; If not, send and low-pressure drum feed water by-pass control valve water level is thrown automatically and the instruction of closedown low-pressure drum bursting diaphragm.
13. gas power station low pressure feed water system start and stop methods according to claim 12, it is characterized in that, described gas power station low pressure feed water system start and stop method comprises: stop step, described stopping step comprising:
Judge whether described combustion engine has stopped and whether low voltage bypass control valve closes;
If described combustion engine has been stopped and low voltage bypass control valve closes, judge whether low-pressure drum feedwater main road control valve and low-pressure drum feed water by-pass feed-regulating valve have closed and whether have been switched to manually, whether low-pressure drum feedwater main road motor-driven valve and low-pressure drum feed water by-pass feedwater motor-driven valve close; If not, send and close low-pressure drum feedwater main road control valve and low-pressure drum feed water by-pass feed-regulating valve and be switched to manual instruction, and close the instruction of described low-pressure drum feedwater main road motor-driven valve and low-pressure drum feed water by-pass feedwater motor-driven valve;
If low-pressure drum feedwater main road control valve and low-pressure drum feed water by-pass feed-regulating valve have closed and have been switched to manually, and low-pressure drum feedwater main road motor-driven valve and low-pressure drum feed water by-pass feedwater motor-driven valve close, judge that on low-pressure coal saver, water adjusts water motor-driven valve on valve, low-pressure coal saver, valve, low-pressure coal saver bypass motor-driven valve, low-pressure coal saver recirculation pump outlet Electrically operated gate is adjusted in low-pressure coal saver bypass, low-pressure coal saver recirculation regulates and whether low-pressure coal saver recirculation motor-driven valve closes, and whether first and second low-pressure coal saver recirculation pump stops transport;
If not, send water on closedown low-pressure coal saver and adjust water motor-driven valve on valve, low-pressure coal saver, low-pressure coal saver bypass tune valve, low-pressure coal saver bypass motor-driven valve, low-pressure coal saver recirculation pump outlet Electrically operated gate, low-pressure coal saver recirculation adjustment and low-pressure coal saver recirculation motor-driven valve, and the instruction of stoppage in transit first and second low-pressure coal saver recirculation pump described.
14. gas power station low pressure feed water system start and stop methods according to claim 13, is characterized in that, the condition that described setting up procedure permission runs is:
Arbitrary condensate pump runs and outlet main-piping pressure meets preset pressure; And
Arbitrary enclosed cooling water pump runs and outlet main-piping pressure is greater than 0.45MPa; And
Condensate water water quality meets preassigned.
15. gas power station low pressure feed water system start and stop methods according to claim 13, is characterized in that, the condition that described stopping step permission runs is:
Middle pressure feed pump in waste heat boiler in pressure water supply system is stopped transport; And
High-pressure feed water pump shutdown in waste heat boiler high-pressure feed water system.
16. gas power station low pressure feed water system start and stop methods according to claim 12, is characterized in that, in described setting up procedure, if described combustion engine has fire, judge whether low-pressure drum pressure is greater than described first preset pressure.
17. gas power station low pressure feed water system start and stop methods according to claim 12, it is characterized in that, in described setting up procedure, if described force value is greater than described first preset pressure, judge whether low-pressure drum feed water by-pass control valve has thrown water level automatic, and whether low-pressure drum water level is in predetermined water level threshold range, and whether low-pressure drum bursting diaphragm closes.
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| CN201510052561.0A CN104613461B (en) | 2015-02-02 | 2015-02-02 | Gas power station low pressure feed water system and start and stop method thereof |
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| CN201510052561.0A CN104613461B (en) | 2015-02-02 | 2015-02-02 | Gas power station low pressure feed water system and start and stop method thereof |
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| CN104613461A true CN104613461A (en) | 2015-05-13 |
| CN104613461B CN104613461B (en) | 2016-06-15 |
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| CN201510052561.0A Active CN104613461B (en) | 2015-02-02 | 2015-02-02 | Gas power station low pressure feed water system and start and stop method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106765028A (en) * | 2017-01-22 | 2017-05-31 | 华北电力科学研究院有限责任公司 | A kind of power plant boiler starts boiler circuit and its start-up and shut-down control method |
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| US5533337A (en) * | 1993-07-23 | 1996-07-09 | Hitachi, Ltd. | Feed water supply system of power plant |
| JP2000291906A (en) * | 1999-04-08 | 2000-10-20 | Babcock Hitachi Kk | Boiler water supply device and method for operating the same |
| CN102563612A (en) * | 2012-01-30 | 2012-07-11 | 浙江省电力设计院 | Method for directly starting steam-driven feed water pump of large-sized thermal power plant |
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| CN106765028A (en) * | 2017-01-22 | 2017-05-31 | 华北电力科学研究院有限责任公司 | A kind of power plant boiler starts boiler circuit and its start-up and shut-down control method |
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| CN104613461B (en) | 2016-06-15 |
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