CN115142919B - Zero-power internet surfing peak regulation method based on low-pressure cylinder zero-output combined electrode boiler - Google Patents
Zero-power internet surfing peak regulation method based on low-pressure cylinder zero-output combined electrode boiler Download PDFInfo
- Publication number
- CN115142919B CN115142919B CN202110339115.3A CN202110339115A CN115142919B CN 115142919 B CN115142919 B CN 115142919B CN 202110339115 A CN202110339115 A CN 202110339115A CN 115142919 B CN115142919 B CN 115142919B
- Authority
- CN
- China
- Prior art keywords
- pressure cylinder
- low
- supply network
- heat supply
- zero
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 238000010248 power generation Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- 230000001131 transforming effect Effects 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/0002—Means for connecting central heating radiators to circulation pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a low-pressure cylinder zero-output combined electrode boiler which comprises a heat supply network heater, a heat supply network circulating water pump and a heat supply network pipeline, wherein the heat supply network heater is communicated with a plate heat exchanger through a heat supply network pipeline, the plate heat exchanger is respectively communicated with the heat supply network heater and an internal circulating water pump through the heat supply network pipeline, the internal circulating water pump is communicated with the electrode boiler through the heat supply network pipeline, the electrode boiler is communicated with a generator through the heat supply network pipeline, the generator is communicated with a low-pressure cylinder through the heat supply network pipeline, a steam inlet of the low-pressure cylinder is communicated with a steam outlet of a medium-pressure cylinder through a hydraulic butterfly valve, the medium-pressure cylinder is communicated with the heat supply network heater through the heat supply network pipeline, and the heat supply network pipeline connected with the left side of the heat supply network heater is a heat supply network water supply network pipeline. The zero-output combined electrode boiler based on the low-pressure cylinder has the advantage of double zero peak regulation, and solves the problem that the heating period of the cogeneration unit cannot be operated in a 'thermoelectric decoupling' mode, so that deep peak regulation is realized.
Description
Technical Field
The invention relates to the technical field of deep peak regulation production of cogeneration units, in particular to a zero-power internet peak regulation method based on a low-pressure cylinder zero-output combined electrode boiler.
Background
The peak regulation refers to the condition that the generator set operates under the working condition of 50% lower than rated power in order to receive new energy sources such as wind energy and photovoltaic to the maximum extent, reduce the consumption of fossil coal sources, reasonably allocate power grid structures, meet the power requirements of different areas and reduce the emission of pollutants, generally, the pure condensing unit can realize the deep peak regulation of 30% of rated power, the condensing type cogeneration unit can ensure the heating quality in the heating period, and the minimum load of the unit cannot be lower than a certain limit value under the heating and steam extraction working condition according to the design requirements of a turbine manufacturer, otherwise, the heating quality requirement cannot be met, namely, the thermoelectric coupling operation is necessary.
In recent years, in northern areas of China, because of slow increase of the application of a large number of renewable energy power generation (wind power generation, solar power generation, biomass power generation and the like) units and the regional industrial power load, particularly in the heating period in winter each year, in order to ensure the heating needs and heating quality of heating users, the coal-fired cogeneration unit cannot perform peak regulation operation, so that the renewable energy power generation Internet surfing is limited, and the phenomenon of wind discarding and light discarding in the heating period is serious, a zero-power Internet surfing peak regulation method based on a low-pressure cylinder zero-output combined electrode boiler is provided, the problem that the heating period of the cogeneration unit cannot be operated in a thermal decoupling mode is solved, and deep peak regulation is realized.
Disclosure of Invention
The invention aims to provide a zero-power internet surfing peak-shaving method based on a low-pressure cylinder zero-output combined electrode boiler, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The utility model provides a zero output combines electrode boiler based on low pressure jar, includes heat supply network heater, heat supply network circulating water pump and heat supply network pipeline, the heat supply network heater passes through heat supply network pipeline and plate heat exchanger intercommunication, plate heat exchanger has heat supply network heater and internal circulation water pump through heat supply network pipeline intercommunication respectively, internal circulation water pump has electrode boiler through heat supply network pipeline intercommunication, electrode boiler has the generator through heat supply network pipeline intercommunication, the generator has the low pressure jar through heat supply network pipeline intercommunication, the steam inlet of low pressure jar communicates through hydraulic butterfly valve with the medium pressure jar steam outlet, the medium pressure jar passes through heat supply network pipeline and heat supply network heater intercommunication.
As still further aspects of the invention: the heat supply network pipeline connected with the left side of the heat supply network heater is a heat supply network water supply pipeline, and the heat supply network pipeline connected with the left side of the heat supply network circulating water pump is a heat supply network water return pipeline.
As still further aspects of the invention: an internal circulating pipeline is connected between the plate heat exchanger and the electrode boiler by using an internal circulating water pump and a heat supply pipe, and the internal circulating pipeline is controlled by the internal circulating water pump.
The zero-power internet surfing peak-shaving method based on the low-pressure cylinder zero-output combined electrode boiler is characterized by comprising the following steps of:
1) The method comprises the steps of performing zero-output transformation on a low-pressure cylinder of a steam turbine, extracting cooling steam from exhaust steam of a medium-pressure cylinder to a steam inlet of the low-pressure cylinder according to the heating operation requirement of cutting off the steam inlet of the low-pressure cylinder, extracting the cooling steam from the exhaust steam of the medium-pressure cylinder to the middle of the steam inlet of the low-pressure cylinder, controlling the cooling steam by two hydraulic butterfly valves capable of being fully sealed, greatly deviating the operation condition of a low-pressure cylinder through-flow part from the design working condition when the unit is operated under the condition of extremely low volume flow when the unit is operated under the condition of zero-output, ensuring the safe operation of the unit for fully monitoring the operation state of the low-pressure cylinder through-flow part, and adding or transforming part operation monitoring measuring points;
2) The method comprises the steps of modifying a high-voltage electric power boiler and a heating system thereof, configuring five MW electric power boilers, extending an electrode boiler power supply through a kV open-type power distribution device, leading the electrode boiler power supply, extending an outlet interval altogether, keeping the connection mode of the extended kV interval consistent with that of the original kV power distribution device, adopting double bus connection, leading the electrode boiler power supply to a high-voltage heating transformer at an electrode boiler room through a kV high-voltage cable, adopting an on-load voltage regulation mode on the high-voltage side of the high-voltage heating transformer, and splitting the low-voltage side of the high-voltage heating transformer;
3) The original heating system is transformed, the heat supply network main network circulating water of the original heat supply network head station and the heat supply network system circulating water of the electrode boiler are operated in series, the heat supply network main network backwater is heated by the electrode boiler firstly, then enters the heat supply network head station, and is supplied to a heat user after being heated again;
4) The zero output of the low-pressure cylinder of the steam turbine is matched with the high-pressure electric boiler to realize deep peak regulation, when a power grid has peak regulation requirements in a heating period, power grid dispatching orders power plant operators to start peak regulation, in order to simultaneously meet the heating requirements of heat consuming users, the power plant operators adjust the load of the unit to the minimum load of a nuclear single machine in the heating period, the zero output function of the low-pressure cylinder of the steam turbine is input, the generating load of the unit is reduced to be close to the vicinity of rated power percent, electrode boiler equipment is input at the moment, and the power output of the unit is reduced until the outlet power is close to zero power, so that deep peak regulation is realized.
As still further aspects of the invention: in the step 1), cooling steam is led out from the steam exhaust of the medium pressure cylinder to a steam inlet of the low pressure cylinder, the blast heat of the last stage of blades of the low pressure cylinder is kept consistent with the specification of the medium and low pressure communicating pipe after the hydraulic butterfly valve interface is modified.
As still further aspects of the invention: when the operation monitoring point in the step 1) monitors the working condition of small volume flow, the last two stages of the low-pressure cylinder are in the blasting working condition, so that the temperature after the last two stages of the low-pressure cylinder and the temperature of the low-pressure exhaust cylinder are reduced by spraying water.
As still further aspects of the invention: the zero-power internet surfing peak-shaving method based on the low-pressure cylinder zero-output combined electrode boiler is characterized in that in the step 1), the final-stage blade of the low-pressure cylinder is subjected to metal wear-resistant layer spraying treatment.
As still further aspects of the invention: in the step 2), the low-voltage side is a double split winding, the low-voltage side is connected with an electrode boiler room by adopting a tubular bus, the electrode boiler body is powered by adopting a kV voltage level, and the electrode boiler and a steam heat supply network heating system are in series operation; the five electrode boilers are designed in parallel.
As still further aspects of the invention: in the step 3), the electrode boiler heat network system adopts plate heat exchangers, and the outlet circulating water supply and return water pipeline of each plate heat exchanger is respectively and independently connected with the main heat network circulating water supply and return water main pipe, and is provided with a shut-off valve.
As still further aspects of the invention: in step 3), in order to meet the requirement of the electrode boiler system under the accident condition, an electric isolation valve is arranged on a main heat supply network circulating water pipeline.
Compared with the prior art, the invention has the beneficial effects that:
1. the zero-power internet surfing peak regulation method based on the low-pressure cylinder zero-output combined electrode boiler realizes the deep peak regulation of the 'power generation zero internet surfing' of the unit in the heating period by a technical route combining the zero-output of the low-pressure cylinder of the steam turbine with the heating technology of the high-pressure electrode boiler.
2. The zero-power internet surfing peak-shaving method based on the combination of the zero output of the low-pressure cylinder and the electrode boiler reduces the peak-shaving operation power of the electrode boiler by the zero output operation of the low-pressure cylinder, and can furthest reduce the energy loss in the peak-shaving operation process of the electrode boiler.
3. The zero-power internet peak regulation method based on the low-pressure cylinder zero-output combined electrode boiler realizes double-zero peak regulation under the condition that the heat supply requirement is not particularly high, and can simultaneously achieve triple targets of peak regulation, energy conservation and heat supply.
Drawings
FIG. 1 is a schematic diagram of a zero power on-line peak shaving method based on a low pressure cylinder zero output combined electrode boiler.
In the figure: 1. a heating network heater; 2. a heat supply network circulating water pump; 3. a plate heat exchanger; 4. an internal circulating water pump; 5. an electrode boiler; 6. a medium pressure cylinder; 7. a hydraulic butterfly valve; 8. a low pressure cylinder; 9. a generator; 10. and a heat supply network pipeline.
Detailed Description
Referring to fig. 1, in the embodiment of the invention, a low-pressure cylinder zero-output combined electrode boiler comprises a heat supply network heater 1, a heat supply network circulating water pump 2 and a heat supply network pipeline 10, wherein the heat supply network heater 1 is communicated with a plate heat exchanger 3 through the heat supply network pipeline 10, the plate heat exchanger 3 is respectively communicated with the heat supply network heater 1 and an internal circulating water pump 4 through the heat supply network pipeline 10, the internal circulating water pump 4 is communicated with an electrode boiler 5 through the heat supply network pipeline 10, the electrode boiler 5 is communicated with a generator 9 through the heat supply network pipeline 10, the generator 9 is communicated with a low-pressure cylinder 8 through the heat supply network pipeline 10, a steam inlet of the low-pressure cylinder 8 is communicated with a steam outlet of a medium-pressure cylinder 6 through a hydraulic butterfly valve 7, and the medium-pressure cylinder 6 is communicated with the heat supply network heater 1 through the heat supply network pipeline 10.
In a preferred embodiment, the heat supply network pipe 10 connected to the left side of the heat supply network heater 1 is a heat supply network water supply pipe, the heat supply network pipe 10 connected to the left side of the heat supply network circulating water pump 2 is a heat supply network water return pipe, and the heat supply network water enters through the heat supply network water supply pipe and is discharged through the heat supply network water return pipe, so that the heat supply network water circulates.
In a preferred embodiment, an internal circulation pipeline is connected between the plate heat exchanger 3 and the electrode boiler 5 by using an internal circulation water pump 4 and a heat supply network pipeline 10, and the internal circulation pipeline is controlled by the internal circulation water pump 4.
The zero-power internet surfing peak-shaving method based on the low-pressure cylinder zero-output combined electrode boiler is characterized by comprising the following steps of:
1) The low-pressure cylinder 8 of the steam turbine is transformed with zero output, according to cutting off the heating operation requirement of the low-pressure cylinder 8, the exhaust steam of the medium-pressure cylinder 6 is led out to the steam inlet of the low-pressure cylinder 8, the exhaust steam of the medium-pressure cylinder 6 is led out of the middle of the steam inlet of the low-pressure cylinder 8 and is controlled by two hydraulic butterfly valves 7 which can be completely sealed, when the low-pressure cylinder 8 of the unit runs with zero output, the running condition of the ventilation part of the low-pressure cylinder 8 deviates from the design working condition to be operated under the condition of extremely low volume flow, in order to fully monitor the running state of the ventilation part of the low-pressure cylinder 8, ensure the safe running of the unit, and increase or transform part of operation monitoring points;
2) The high-voltage electric power boiler 5 and the heating system thereof are improved, five 40MW electric power boilers 5 are configured, the electric power of the electric power boiler 5 is led after being expanded through a 220kV open-type distribution device, an outlet interval is expanded, the wiring pattern of the expanded 220kV interval is consistent with that of the original 220kV distribution device, double bus wiring is adopted, the electric power is led to a high-voltage heating transformer at a room of the electric power boiler 5 through a 220kV high-voltage cable, the high-voltage side of the high-voltage heating transformer adopts an on-load voltage regulation mode, and the low-voltage side is in a split mode.
In a preferred embodiment, in the step 1), cooling steam is led out from the middle pressure cylinder 6 to a steam inlet of the low pressure cylinder 8, so that when the unit runs with zero output, the blast heat of the last stage of blades of the low pressure cylinder 8 can be taken away, and the interface size of the hydraulic butterfly valve 7 is consistent with the specification of the middle and low pressure communicating pipe after modification.
In a preferred embodiment, when the operation monitoring point in the step 1) monitors the small volume flow operating condition, the last two stages of the low-pressure cylinder 8 are in the blast operating condition, so that the temperature after the last two stages of the low-pressure cylinder 8 and the temperature of the low-pressure exhaust cylinder are increased, and in order to reduce the temperature of the low-pressure exhaust cylinder, the water spraying temperature reduction is required to be continuously input, and the temperature of the low-pressure exhaust cylinder is maintained within a safe range.
In a preferred embodiment, under the condition of small volume flow in the step 1), vortex generated by the last-stage blade can scratch the de-ionized water to the flow channel of the movable blade, so that the water erosion condition of the root area of the steam outlet edge of the movable blade is aggravated, the safe operation of the unit is threatened, and therefore, the metal wear-resistant layer spraying treatment is carried out on the last-stage blade of the low-pressure cylinder 8.
In a preferred embodiment, in the step 2), the low-voltage side is a double split winding, the low-voltage side is connected to an electrode boiler 5 room by a tubular bus, the electrode boiler 5 body is powered by a voltage level of 10kV, and the electrode boiler 5 is operated in series with a steam heating network heating system; the five electrode boilers 5 are designed in parallel, and a plurality of the electrode boilers 5 can be put into operation at will, and the whole electrode boiler 5 system can realize the random adjustment of electricity consumption and heating load due to the load adjustment capability of the electrode boilers 5 in the range of 0-100%.
The working principle of the invention is as follows: the technical route of combining zero output of the low-pressure cylinder 8 of the steam turbine and the heating technology of the high-pressure electrode boiler 5 is adopted, so that the deep peak regulation of the 'power generation zero surfing' of the unit in the heating period is realized, the energy technical innovation is quickened, the operation flexibility of the thermal power unit is improved, the peak regulation and new energy load absorption capacity of a power grid system are improved, and a feasible scheme is provided.
Referring to fig. 1, the embodiment of the present invention further includes 3) modifying an original heating system, wherein the heat supply network main network circulating water of the original heat supply network head station and the heat supply network system circulating water of the electrode boiler 5 are operated in series, and the heat supply network main network backwater is heated by the electrode boiler 5 first, then enters the heat supply network head station, and is supplied to a heat user after being heated again.
In a preferred embodiment, in step 3), in order to isolate the electrode boiler 5 system in case of accident, an electric isolating valve is arranged on the circulating water pipeline of the main heat supply network, which plays a role in controlling the heat supply network system and avoids affecting the normal operation of the main heat supply network system.
In a preferred embodiment, in the step 3), the electrode boiler heat network system adopts plate heat exchangers 3, the outlet circulating water supply and return water pipeline of each plate heat exchanger 3 is respectively and independently connected with the main heat network circulating water supply and return water main pipe, and a shut-off valve is arranged, and the shut-off valve is used for controlling the communication among the return water pipeline, the main heat network circulating water supply and return water main pipe connection, so that automatic management and control are facilitated.
The working principle of the invention is as follows: the deep peak-shaving working condition of the unit can not reduce the heat supply load, and the zero-output operation of the low-pressure cylinder 8 reduces the generating power of the unit, so that the peak-shaving operation power of the electrode boiler 5 is reduced, and the energy loss in the peak-shaving operation process of the electrode boiler 5 can be reduced to the greatest extent.
Referring to fig. 1, the embodiment of the invention further includes 4) zero output of the low-pressure cylinder 8 of the steam turbine is matched with the high-pressure electric boiler 5 to realize deep peak regulation, when the peak regulation requirement exists in the power grid in the heating period, the power grid is used for dispatching the power plant operators to order to start peak regulation, in order to simultaneously meet the heating requirement of the heat consuming user, the power plant operators adjust the unit load to the minimum load of the single unit in the heating period, the unit load is put into the zero output function of the low-pressure cylinder 8 of the steam turbine, the unit power generation load is reduced to be close to 50% of the rated power, and at the moment, the unit output is reduced until the outlet power is close to zero power by putting into the electrode boiler 5 equipment, so that deep peak regulation is realized.
The working principle of the invention is as follows: under the condition of higher heat supply demand, the electrode boiler 5 can independently realize peak shaving function, and the maximum peak shaving space can be reduced to the depth of zero power generation surfing; under the condition that the heat supply requirement is not particularly high, the zero output function of the low-pressure cylinder 8 of the steam turbine and the electrode boiler 5 equipment can be synchronously input, the double zero peak regulation is realized, and the triple targets of peak regulation, energy conservation and heat supply can be simultaneously achieved.
It should be noted that, the foregoing embodiments all belong to the same inventive concept, and the descriptions of the embodiments have emphasis, and where the descriptions of the individual embodiments are not exhaustive, reference may be made to the descriptions of the other embodiments.
The foregoing examples merely illustrate embodiments of the invention and are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (7)
1. The zero-power internet surfing peak-shaving method based on the low-pressure cylinder zero-output combined electrode boiler comprises the zero-power internet surfing peak-shaving method based on the low-pressure cylinder zero-output combined electrode boiler and comprises a heat supply network heater (1), a heat supply network circulating water pump (2) and a heat supply network pipeline (10), and is characterized in that: the heat supply network system comprises a heat supply network heater (1), a plate heat exchanger (3) and a medium pressure cylinder (6), wherein the heat supply network heater (1) and an internal circulating water pump (4) are respectively communicated with the plate heat exchanger (3) through a heat supply network pipeline (10), an electrode boiler (5) is communicated with the internal circulating water pump (4) through the heat supply network pipeline (10), a generator (9) is communicated with the electrode boiler (5) through the heat supply network pipeline (10), a low pressure cylinder (8) is communicated with the generator (9) through the heat supply network pipeline (10), a steam inlet of the low pressure cylinder (8) is communicated with a steam outlet of the medium pressure cylinder (6) through a hydraulic butterfly valve (7), the medium pressure cylinder (6) is communicated with the heat supply network heater (1) through the heat supply network pipeline (10), the heat supply network pipeline (10) connected with the left side of the heat supply network heater (1) is a heat supply network water return pipeline, and the plate heat exchanger (3) is connected with the internal circulating water pump (2) through the electrode water pump (4) through the heat supply network pipeline (4);
the zero-power internet surfing peak regulation method comprises the following steps of:
1) The method comprises the steps of performing zero-output transformation on a low-pressure cylinder of a steam turbine, according to the requirement of cutting off the steam inlet heating operation of the low-pressure cylinder (8), leading out cooling steam from the steam exhaust of the medium-pressure cylinder (6) to a steam inlet of the low-pressure cylinder (8), leading out the cooling steam from the steam exhaust of the medium-pressure cylinder (6) to the middle of the steam inlet of the low-pressure cylinder (8), controlling the cooling steam through two hydraulic butterfly valves (7) which can be completely sealed, and when the low-pressure cylinder (8) of the unit runs under zero-output operation, greatly deviating the running condition of the through-flow part of the low-pressure cylinder (8) from the design working condition, running under the condition of extremely low volume flow, and ensuring the safe running of the unit and increasing or transforming part of the running monitoring points;
2) Five 40MW electrode boilers (5) are configured, power supplies of the electrode boilers (5) are extended through a 220kV open type distribution device and then connected, an outlet interval is extended, a wiring pattern of the extended 220kV interval is consistent with that of the original 220kV distribution device, double bus wiring is adopted, the two bus wiring is connected to a high-voltage heating transformer at a room of the electrode boilers (5) through a 220kV high-voltage cable, the high-voltage side of the high-voltage heating transformer adopts a loaded voltage regulation mode, and the low-voltage side is in a split mode;
3) The original heating system is modified, the main network circulating water of the heat supply network of the original heat supply network head station and the circulating water of the heat supply network system of the electrode boiler (5) are operated in series, the return water of the main network of the heat supply network is heated by the electrode boiler (5) firstly, then enters the heat supply network head station, and is supplied to a heat user after being heated again;
4) The zero output of the low-pressure cylinder of the steam turbine is matched with the high-pressure electric boiler (5) to realize deep peak regulation, when the peak regulation requirement is met in a power grid in a heating period, the power grid is used for dispatching a power plant operator to order to start peak regulation, in order to simultaneously meet the heating requirement of a heat utilization user, the power plant operator adjusts the load of a unit to the minimum load of a nuclear single machine in the heating period, the unit is put into the zero output function of the low-pressure cylinder of the steam turbine, the power generation load of the unit is reduced to be close to 50% of rated power, and the unit is put into the equipment of the electrode boiler (5).
2. The zero-power internet surfing peak-shaving method based on the low-pressure cylinder zero-output combined electrode boiler according to claim 1, wherein in the step 1), cooling steam is led out from steam exhaust of a middle-pressure cylinder (6) to a steam inlet of a low-pressure cylinder (8), the blast heat of a last stage blade of the low-pressure cylinder (8), and the interface size of a hydraulic butterfly valve (7) is kept consistent with the specification of a rebuilt middle-low pressure communicating pipe.
3. The zero-power internet surfing peak-shaving method based on the low-pressure cylinder zero-output combined electrode boiler according to claim 1, wherein when the small-volume flow working condition operation is monitored by the operation monitoring measuring point in the step 1), the last two stages of the low-pressure cylinder (8) are operated in a blowing working condition, so that the last two stages of the low-pressure cylinder (8) are subjected to post-temperature and low-pressure exhaust cylinder input water spraying and temperature reduction.
4. The zero-power internet surfing peak-shaving method based on the low-pressure cylinder zero-output combined electrode boiler according to claim 1, wherein in the step 1), the metal wear-resistant layer spraying treatment is carried out on the last-stage blade of the low-pressure cylinder (8).
5. The zero-power internet surfing peak-shaving method based on the low-pressure cylinder zero-output combined electrode boiler according to claim 1, wherein in the step 2), a low-pressure side is a double-split winding, a low-pressure side is connected with an electrode boiler (5) room by adopting a tubular bus, the electrode boiler (5) body is powered by adopting a voltage level of 10kV, and the electrode boiler (5) and a steam heating network heating system are operated in series; the five electrode boilers (5) are designed in parallel.
6. The zero-power internet surfing peak-shaving method based on the low-pressure cylinder zero-output combined electrode boiler according to claim 1, wherein in the step 3), a plate heat exchanger (3) is adopted in the electrode boiler (5) heat network system, and an outlet circulating water supply pipeline and a circulating water return pipeline of each plate heat exchanger (3) are respectively and independently connected with a main heat network circulating water supply pipe and a main circulating water return pipe, and a shut-off valve is arranged.
7. The zero-power internet surfing peak-shaving method based on the low-pressure cylinder zero-output combined electrode boiler according to claim 1, wherein in the step 3), in order to isolate the electrode boiler (5) system under the condition of meeting an accident, an electric isolating valve is arranged on a main heat supply network circulating water pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110339115.3A CN115142919B (en) | 2021-03-30 | 2021-03-30 | Zero-power internet surfing peak regulation method based on low-pressure cylinder zero-output combined electrode boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110339115.3A CN115142919B (en) | 2021-03-30 | 2021-03-30 | Zero-power internet surfing peak regulation method based on low-pressure cylinder zero-output combined electrode boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115142919A CN115142919A (en) | 2022-10-04 |
| CN115142919B true CN115142919B (en) | 2024-05-28 |
Family
ID=83404065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110339115.3A Active CN115142919B (en) | 2021-03-30 | 2021-03-30 | Zero-power internet surfing peak regulation method based on low-pressure cylinder zero-output combined electrode boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115142919B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2259485C1 (en) * | 2004-10-12 | 2005-08-27 | Общество с ограниченной ответственностью "Самара-Авиагаз" | Main electric and heating line with closed thermal system |
| CN101950964A (en) * | 2010-08-24 | 2011-01-19 | 西安交通大学 | System containing cogeneration unit and pure condensing steam thermal power unit as well as scheduling method |
| WO2015127572A1 (en) * | 2014-02-28 | 2015-09-03 | 清华大学 | Electric power peak-shaving and combined heat and power waste heat recovery device and operation method thereof |
| CN106894855A (en) * | 2017-04-01 | 2017-06-27 | 祝凤娟 | A kind of thermoelectricity decoupling transformation and operation method based on heat source side and heat supply network comprehensive adjustment |
| CN107143390A (en) * | 2017-06-29 | 2017-09-08 | 西安西热节能技术有限公司 | A kind of thermoelectricity decoupling fired power generating unit depth peak regulation system and method without cold source energy |
| CN107269331A (en) * | 2017-04-28 | 2017-10-20 | 华电电力科学研究院 | Realize cascaded utilization of energy and participate in the heat supply steam bleeding system and method for depth peak regulation |
| CN206683029U (en) * | 2017-04-06 | 2017-11-28 | 华北电力大学 | A kind of two-stage based on heat supply network progressive solution takes out solidifying heating system |
| CN107504543A (en) * | 2016-12-16 | 2017-12-22 | 大唐东北电力试验研究所有限公司 | Cogeneration units depth peak regulation system and method are improved using electric boiler heat supply |
| CN108035776A (en) * | 2017-12-30 | 2018-05-15 | 华能国际电力股份有限公司丹东电厂 | A kind of thermoelectricity decoupled system and operation method |
| WO2018233024A1 (en) * | 2017-06-22 | 2018-12-27 | 赫普热力发展有限公司 | Thermoelectric decoupling peak load regulating system |
| CN110864343A (en) * | 2019-12-13 | 2020-03-06 | 华能国际电力股份有限公司 | Low-pressure cylinder zero-output heat supply system of circulating fluidized bed unit |
| CN210718089U (en) * | 2019-10-16 | 2020-06-09 | 青岛达能环保设备股份有限公司 | Closed type circulating water device with voltage stabilizing function for electrode boiler |
-
2021
- 2021-03-30 CN CN202110339115.3A patent/CN115142919B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2259485C1 (en) * | 2004-10-12 | 2005-08-27 | Общество с ограниченной ответственностью "Самара-Авиагаз" | Main electric and heating line with closed thermal system |
| CN101950964A (en) * | 2010-08-24 | 2011-01-19 | 西安交通大学 | System containing cogeneration unit and pure condensing steam thermal power unit as well as scheduling method |
| WO2015127572A1 (en) * | 2014-02-28 | 2015-09-03 | 清华大学 | Electric power peak-shaving and combined heat and power waste heat recovery device and operation method thereof |
| CN107504543A (en) * | 2016-12-16 | 2017-12-22 | 大唐东北电力试验研究所有限公司 | Cogeneration units depth peak regulation system and method are improved using electric boiler heat supply |
| CN106894855A (en) * | 2017-04-01 | 2017-06-27 | 祝凤娟 | A kind of thermoelectricity decoupling transformation and operation method based on heat source side and heat supply network comprehensive adjustment |
| CN206683029U (en) * | 2017-04-06 | 2017-11-28 | 华北电力大学 | A kind of two-stage based on heat supply network progressive solution takes out solidifying heating system |
| CN107269331A (en) * | 2017-04-28 | 2017-10-20 | 华电电力科学研究院 | Realize cascaded utilization of energy and participate in the heat supply steam bleeding system and method for depth peak regulation |
| WO2018233024A1 (en) * | 2017-06-22 | 2018-12-27 | 赫普热力发展有限公司 | Thermoelectric decoupling peak load regulating system |
| CN107143390A (en) * | 2017-06-29 | 2017-09-08 | 西安西热节能技术有限公司 | A kind of thermoelectricity decoupling fired power generating unit depth peak regulation system and method without cold source energy |
| CN108035776A (en) * | 2017-12-30 | 2018-05-15 | 华能国际电力股份有限公司丹东电厂 | A kind of thermoelectricity decoupled system and operation method |
| CN210718089U (en) * | 2019-10-16 | 2020-06-09 | 青岛达能环保设备股份有限公司 | Closed type circulating water device with voltage stabilizing function for electrode boiler |
| CN110864343A (en) * | 2019-12-13 | 2020-03-06 | 华能国际电力股份有限公司 | Low-pressure cylinder zero-output heat supply system of circulating fluidized bed unit |
Non-Patent Citations (2)
| Title |
|---|
| 《热力发电》2005年总目次;热力发电;20051225(第12期);全文 * |
| 330MW机组低压缸零出力改造及热电特性分析;史卫刚;李军辉;;河北电力技术;20200425(第02期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115142919A (en) | 2022-10-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108035777B (en) | Low-pressure cylinder combined zero-output heat supply system and method in thermal power generating unit | |
| CN111852597A (en) | Variable-parameter multi-element cascade thermoelectric decoupling system of thermal power heat supply unit and adjusting method | |
| CN113339089B (en) | Efficient peak regulation steam turbine system and working method thereof | |
| CN110005488B (en) | Energy-saving optimization method for high-back-pressure heat supply system | |
| CN111485964B (en) | Thermoelectric decoupling method for coal-fired power plant based on turboexpander | |
| CN112228940B (en) | Heating system combining vapor compressor and high-back-pressure heating and adjusting method | |
| CN111206970B (en) | Peak regulating system utilizing steam jet and steam extractor in thermal power plant and control method | |
| CN212296519U (en) | Variable-parameter multi-element cascade thermoelectric decoupling system of thermal power heat supply unit | |
| CN210289857U (en) | Thermal power plant industrial heat supply energy-saving system participating in deep peak shaving | |
| CN115142919B (en) | Zero-power internet surfing peak regulation method based on low-pressure cylinder zero-output combined electrode boiler | |
| CN216554044U (en) | 600MW unit steam-heat output integrated device | |
| CN112983575B (en) | High-flow steam extraction and heat supply steam turbine system | |
| CN215057621U (en) | Double-fed system-based water supply and condensed water optimization cooperative system for wet cooling unit | |
| CN212565993U (en) | Heat supply operation system for prolonging service life of safety valve | |
| CN113898423A (en) | High-efficient turbo electric power generation system of degree of depth peak regulation that unipolar was arranged | |
| CN114458405A (en) | Multi-unit cooperative steam power generation system | |
| CN113090542A (en) | Steam-electricity double-drive water pump system of indirect air cooling unit based on double-feed system | |
| CN219691612U (en) | 700MW thermal power unit low pressure cylinder zero output cuts jar steam extraction system | |
| CN212987349U (en) | Peak-shaving heat supply system for straight condensing unit | |
| CN218335340U (en) | Energy storage and discharge system of cogeneration unit under deep peak regulation operation | |
| CN218763353U (en) | Combined-cycle temperature-reducing water system of horizontal waste heat boiler | |
| Zeng et al. | Research on key technology and application of flexibility transformation of heating unit to improve clean energy consumption capacity | |
| CN220151467U (en) | Heat storage type water turbine and air-steam combined cycle cogeneration system | |
| CN212158203U (en) | Vacuum pumping system suitable for ultra-low load operation of air cooling unit | |
| CN220522642U (en) | System suitable for heating and supplying steam in industry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231008 Address after: No. 381 Tongxin South Street, Xixia District, Yinchuan City, Ningxia Hui Autonomous Region, 750000 (self declared) Applicant after: Ningxia Power Investment Yinchuan Thermal Power Co.,Ltd. Address before: 750021 no.381, Tongxin South Street, Xixia District, Yinchuan City, Ningxia Hui Autonomous Region Applicant before: Ningxia Power Investment Xixia Thermal Power Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |