CN112727556A - Low-pressure cylinder zero-output and heat storage tank and low-pressure heater coupled peak shaving system - Google Patents
Low-pressure cylinder zero-output and heat storage tank and low-pressure heater coupled peak shaving system Download PDFInfo
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- CN112727556A CN112727556A CN202110030060.8A CN202110030060A CN112727556A CN 112727556 A CN112727556 A CN 112727556A CN 202110030060 A CN202110030060 A CN 202110030060A CN 112727556 A CN112727556 A CN 112727556A
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- 238000005338 heat storage Methods 0.000 title claims abstract description 144
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 238000000605 extraction Methods 0.000 claims description 165
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 154
- 238000009825 accumulation Methods 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000003303 reheating Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 2
- 229910052760 oxygen Inorganic materials 0.000 claims 2
- 239000001301 oxygen Substances 0.000 claims 2
- 238000010248 power generation Methods 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000006392 deoxygenation reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- 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
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- 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
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- 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
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- 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
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- 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
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
The invention discloses a zero-output low-pressure cylinder and peak shaving system with coupled heat storage tanks and low-pressure heaters, which belongs to the technical field of power generation equipment and comprises a boiler system, a high-pressure cylinder system, an intermediate-pressure cylinder system, a low-pressure cylinder system, a high-pressure heater system, a deoxidizing system, a low-pressure heater system, a condenser system, a heat supply network heater system and a heat storage tank system. The invention is innovated on the basis of a cogeneration unit system which is transformed by low-pressure cylinders with zero output and is provided with a heat storage tank, so that the low-pressure cylinders with zero output and the heat storage tank can assist a thermal power generating unit to participate in deep peak shaving in both heating periods and non-heating periods, thereby solving the problems of impact of the low-pressure cylinders with zero output on a heating network heater and surplus heat supply steam in the heating periods on one hand and solving the problems that the low-pressure cylinders with zero output and the heat storage tank cannot participate in deep peak shaving in the non-heating periods on the other hand.
Description
Technical Field
The invention belongs to the technical field of power generation equipment, and particularly relates to a peak shaving system with zero output of a low-pressure cylinder and coupling of a heat storage tank and a low-pressure heater of a cogeneration unit.
Background
In recent years, zero output of a low-pressure cylinder of a cogeneration unit or arrangement of a heat storage tank are widely adopted transformation measures of the cogeneration unit in the heating period in winter in order to participate in auxiliary peak shaving. In the heating period in winter and during the load valley of the power grid, the low-pressure cylinder of the cogeneration unit has zero output or the cogeneration unit provided with the heat storage tank can reduce the power on the internet on the premise of ensuring the heating requirement, and meet the peak load regulation requirement of the power grid. In the heating period, when the low-pressure cylinder of the cogeneration unit is frequently switched with zero output, on one hand, the steam parameters and the steam quantity of the heat supply network heater are frequently changed to impact the heat supply network heater, and the heat supply network heater is easy to leak; on the other hand, when the cylinder is cut, the steam provided by the heating steam extraction is enough for heat supply, and the steam exhausted by the low-pressure cylinder after the cylinder is cut is surplus heat for heat supply. In the non-heating period, the equipment utilization rate is low because no heat supply is required, the low-pressure cylinder has zero output, and the heat storage tank needs to be stopped.
Therefore, there is a need in the art for a new solution to solve this problem.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the peak regulation system with the coupled low-pressure cylinder zero output and the heat storage tank and the low-pressure heater is used for solving the problems of impact of the low-pressure cylinder zero output to the heat supply network heater and surplus heat supply steam on one hand and solving the problems that the low-pressure cylinder zero output and the heat storage tank can not participate in deep peak regulation when the heat storage tank is stopped in a non-heating period on the other hand.
The peak shaving system with zero output of the low pressure cylinder and coupled heat accumulation tank and low pressure heater comprises a boiler system, a high pressure cylinder system, a middle pressure cylinder system, a low pressure cylinder system, a high pressure heater system, a deoxidization system, a low pressure heater system, a condenser system, a heat supply network heater system and a heat accumulation tank system,
the high-pressure cylinder system comprises a high-pressure cylinder, a first section of steam extraction pipe and a second section of steam extraction pipe;
the intermediate pressure cylinder system comprises an intermediate pressure cylinder, a third section of steam extraction pipe, a fourth section of steam extraction pipe and a fifth section of steam extraction pipe;
the low-pressure cylinder system comprises a low-pressure cylinder, a sixth section of steam extraction pipe, a seventh section of steam extraction pipe and an eighth section of steam extraction pipe;
the deoxygenation system comprises a feed pump and a deoxygenator; the water outlet of the deaerator is fixedly connected with the inlet of the water feeding pump;
the high-pressure heater system comprises three high-pressure heaters and a water supply tee joint which are connected in series, wherein the three high-pressure heaters which are connected in series are a first high-pressure heater, a second high-pressure heater and a third high-pressure heater in sequence; the inlet of the water supply tee joint is fixedly connected with the outlet of the water supply pump, one outlet of the water supply tee joint is fixedly connected with the inlet of the third high-pressure heater, and the other outlet of the water supply tee joint is connected with the outlet of the first high-pressure heater;
the low-pressure heater system comprises four low-pressure heaters which are connected in series; the four low-pressure heaters connected in series are sequentially a first low-pressure heater, a second low-pressure heater, a third low-pressure heater and a fourth low-pressure heater, the four low-pressure heaters are all provided with a heater inlet electric door, a heater outlet electric door, a bypass and a heater bypass electric door, and steam inlet pipelines of the four low-pressure heaters are all provided with a steam extraction electric door and a steam extraction check valve; the outlet of the first low-pressure heater is fixedly connected with the water inlet of the deaerator; an inlet of the fourth low-pressure heater is fixedly connected with one outlet of a condensed water tee joint of the condenser system;
the boiler system comprises a water wall, a superheater and a reheater; the inlet of the water-cooled wall is fixedly connected with the outlet of the first high-pressure heater, and the outlet of the water-cooled wall is fixedly connected with the inlet of the superheater; the outlet of the superheater is fixedly connected with the inlet of the high-pressure cylinder through a main steam pipeline; the outlet of the high-pressure cylinder is fixedly connected with the inlet of the reheater; the outlet of the reheater is fixedly connected with the inlet of the intermediate pressure cylinder through a reheating steam pipeline; the outlet of the intermediate pressure cylinder is fixedly connected with the inlet of the low pressure cylinder through a pipeline; the inlet of the low pressure cylinder is also respectively connected with a heat supply network heater of the heat supply network heater system and a heat storage tank of the heat storage tank system, and the outlet of the low pressure cylinder is fixedly connected with a condenser of the condenser system;
the first section of steam extraction pipe is connected to a first high-pressure heater; the second section of steam extraction pipe is connected to a second high-pressure heater; the third section of steam extraction pipe is connected to a third high-pressure heater; the fourth-section steam extraction pipe is connected to a deaerator; the fifth section of steam extraction pipe is divided into two parts, one part is connected to the first low-pressure heater, and the other part is used as a heating steam extraction pipe and is connected to the heat supply network heater; the sixth section of steam extraction pipe is connected to a second low-pressure heater; the seventh section of steam extraction pipe is connected to a third low-pressure heater; the eighth section of steam extraction pipe is connected to a fourth low-pressure heater;
the condenser system comprises a condensed water tee joint, a condensed water pump and a condenser; a steam side inlet of the condenser is fixedly connected with a steam exhaust port of the low pressure cylinder, and a condensed water side outlet of the condenser is fixedly connected with an inlet of a condensed water pump; the outlet of the condensed water pump is fixedly connected with the inlet of the condensed water tee joint; the other outlet of the condensed water tee joint is fixedly connected with a circulating water side inlet of a heat supply network of the heat storage tank through a pipeline;
the heat supply network heater system comprises a heat supply network heater, a heat supply network circulating water pump, a heat supply network tee joint and a heat user; one path of heat source of the heat supply network heater is communicated with a steam extraction pipe of the first low-pressure heater, the other path of heat source of the heat supply network heater is steam inlet of the intermediate pressure cylinder, and a drain port of the heat supply network heater is connected to the deaerator; an inlet of the heat supply network circulating water pump is fixedly connected with a heat user, and an outlet of the heat supply network circulating water pump is fixedly connected with an inlet of the heat supply network tee joint; one outlet of the heat supply network tee joint is fixedly connected with a water side inlet of the heat supply network heater, and the other outlet of the heat supply network tee joint is fixedly connected with a water side inlet of the heat storage tank;
the heat storage tank system comprises a heat storage tank, a heat source of the heat storage tank is steam inlet of a low-pressure cylinder, a drain port of the heat storage tank is connected to a deaerator, a water side outlet of the heat storage tank is fixedly connected with a heat user, and a water side inlet of the heat storage tank is fixedly connected with one side outlet of a heat supply network tee joint.
And the steam inlet pipelines of the high-pressure heater are provided with steam extraction electric doors and steam extraction check valves.
The pipelines for connecting the low-pressure cylinder with the heating network heater and the heat storage tank are respectively provided with a low-pressure cylinder steam inlet to heating network heater and heat storage tank quick-closing door, a low-pressure cylinder steam inlet to heating network heater electric door and manual door, and a low-pressure cylinder steam inlet to heat storage tank electric door and manual door
And a condensation water side inlet electric door and a manual door of the heat storage tank are arranged on the condensation water tee joint and the heat supply network circulating water side inlet pipeline of the heat storage tank, and a condensation water side outlet electric door and a manual door of the heat storage tank are arranged on the condensation water tee joint and the heat supply network circulating water side outlet pipeline of the heat storage tank.
The water side inlet and outlet of the heat supply network heater are provided with a water side inlet electric door and a hand door of the heat supply network heater, a drain port pipeline of the heat supply network heater is provided with a drain electric door of the heat supply network heater, and a water outlet pipeline of the heat supply network heater is provided with a water side outlet electric door and a hand door of the heat supply network heater.
The heat storage tank is a surface type heat exchange heat storage tank.
The heat supply network circulating water side inlet of the heat storage tank is provided with a heat storage tank heat supply network circulating water side inlet electric door and a manual door, a heat storage tank heat supply network circulating water side outlet electric door is arranged at a heat storage tank heat supply network circulating water side outlet of the heat storage tank, a heat storage tank drainage electric door is arranged on a drain pipe of the heat storage tank, and a heat storage tank steam side inlet electric door is arranged at a steam side inlet of the heat storage tank.
And the first section of steam extraction pipe, the second section of steam extraction pipe, the third section of steam extraction pipe, the fourth section of steam extraction pipe and the fifth section of steam extraction pipe are all provided with a steam extraction check valve and a steam extraction electric door.
The fifth section of steam extraction pipe is also provided with a fifth section of steam extraction to heat supply network heater steam extraction check valve, a fifth section of steam extraction to heat supply network heater steam extraction quick-closing door, a fifth section of steam extraction to heat supply network heater steam extraction electric door and a fifth section of steam extraction to heat supply network heater steam extraction manual door on a pipeline connected with the heat supply network heater.
And the steam inlet pipeline of the deaerator is provided with a steam extraction check valve and a steam extraction electric valve.
Through the design scheme, the invention can bring the following beneficial effects:
when the load of the power grid is low, the low-pressure cylinder is cut off, one part of heat source of the heat grid heater comes from the fifth stage of steam extraction, the other part of heat source comes from the low-pressure cylinder to enter steam according to the requirement of a heat user, redundant heat of the low-pressure cylinder is sent into the heat storage tank, the generated energy is reduced by cutting off the low-pressure cylinder, meanwhile, the heat storage tank is used for receiving the steam entering amount of the low-pressure cylinder, and the impact on the heat grid heater after a large amount of low-pressure cylinder steam enters the heat grid heater is relieved.
When the power grid load is in a peak, the operation of cutting off the low-pressure cylinder is quitted, heat stored in the power grid load in a valley is utilized to supply heat to a heat user, whether the fifth section of steam extraction is put into the heat source of the heat grid heater or not can be determined according to the heat demand of the heat user, the heat of the heat storage tank is utilized to replace part of the fifth section of steam extraction to heat supply of the heat grid heater, the heat demand of the heat user is met, the steam extraction from the fifth section of steam extraction to the heat grid heater is reduced, the generated energy is increased, and the power load requirement of the power.
In the non-heating period, closing the electric door and the manual door of the heat supply network heater from the fifth stage of steam extraction to the heat supply network heater and from the low-pressure cylinder to the heat supply network heater, and cutting off the heat source of the heat supply network heater; and closing the electric door and the manual door at the inlet and outlet of the heat supply network heater and the heat storage tank heat supply network circulating water side. When the load of the power grid is low, the low-pressure cylinder is cut off, meanwhile, an electric door and a manual door of the low-pressure cylinder for feeding steam to the heat storage tank are opened, redundant heat cut off by the low-pressure cylinder is stored in the heat storage tank, and the generating capacity of the unit is reduced by reducing the steam feeding of the low-pressure cylinder; when the load of the power grid is in a peak, the operation of cutting off the low-pressure cylinder is quitted, the electric door and the manual door of the low-pressure cylinder for steam admission to the heat storage tank are closed, the electric door and the manual door of the inlet and outlet of the condensed water side of the heat storage tank are opened, the condensed water is heated by using the heat stored in the heat storage tank, and the temperature of the condensed water entering the low-pressure heater is increased to reasonably cut off one or more low-pressure heaters, so that the steam extraction amount of a low-pressure heater system is reduced, and the generated energy.
The invention is innovated on the basis of a cogeneration unit system which is transformed by low-pressure cylinders with zero output and is provided with a heat storage tank, so that the low-pressure cylinders with zero output and the heat storage tank can assist a thermal power generating unit to participate in deep peak shaving in both heating periods and non-heating periods, thereby solving the problems of impact of the low-pressure cylinders with zero output on a heating network heater and surplus heat supply steam in the heating periods on one hand and solving the problems that the low-pressure cylinders with zero output and the heat storage tank cannot participate in deep peak shaving in the non-heating periods on the other hand.
Drawings
The invention is further described with reference to the following figures and detailed description:
FIG. 1 is a schematic structural diagram of a peak shaving system with zero output of a low-pressure cylinder and coupled heat storage tank and low-pressure heater according to the present invention.
In the figure, 1-a boiler system, 2-a high pressure cylinder, 3-a medium pressure cylinder, 4-a low pressure cylinder, 5-a high pressure heater, 6-a water supply tee joint, 7-a water supply pump, 8-a deaerator, 9-a steam extraction check valve, 10-a steam extraction electric door, 11-a heater inlet electric door, 12-a heater outlet electric door, 13-a low pressure heater, 14-a heater bypass electric door, 15-a condensed water tee joint, 16-a condensed water pump, 17-a condenser, 18-a heat storage tank condensed water side inlet electric door and a manual door, 19-a heat storage tank condensed water side outlet electric door and a manual door, 20-a fifth section steam extraction to heat net heater steam extraction check valve, 21-a fifth section steam extraction to heat net heater steam extraction speed, 22-a fifth section steam extraction to heat net heater steam extraction electric door, 23-a fifth section of steam extraction manual door of a steam extraction heater of the heating network; 24-low-pressure cylinder steam inlet to heat supply network heater and heat storage tank quick-closing door, 25-low-pressure cylinder steam inlet to heat supply network heater electric door and manual door, 26-low-pressure cylinder steam inlet to heat storage tank electric door and manual door, 27-heat supply network heater drainage electric door, 28-heat supply network heater, 29-heat supply network heater water side inlet electric door and manual door, 30-heat supply network heater water side outlet electric door and manual door, 31-heat storage tank heat supply network circulating water side outlet electric door and manual door, 32-heat storage tank, 33-heat storage tank steam side inlet electric door, 34-heat storage tank drainage electric door, 35-heat storage tank heat supply network circulating water side inlet electric door and manual door, 36-heat user, 37-heat supply network circulating water pump, 38-heat supply network tee joint.
Detailed Description
The core of the invention is to provide a peak regulation system with zero output of a low-pressure cylinder and coupling of a heat storage tank and a low-pressure heater, which solves the problems of impact of the zero output of the low-pressure cylinder on a heat supply network heater and surplus heat supply steam on one hand and solves the problems that the zero output of the low-pressure cylinder and shutdown of the heat storage tank cannot participate in deep peak regulation on the other hand in the non-heating period.
The invention will be described in detail with reference to the accompanying figure 1:
as shown in the figure, the peak shaving system with zero output of the low-pressure cylinder and coupled heat accumulation tank and low-pressure heater comprises a boiler system 1, a high-pressure cylinder system, a medium-pressure cylinder system, a low-pressure cylinder system, a high-pressure heater system, a deoxidization system, a low-pressure heater system, a condenser system, a heat supply network heater system and a heat accumulation tank system,
the high-pressure cylinder system comprises a high-pressure cylinder 2, a first section of steam extraction pipe and a second section of steam extraction pipe;
the intermediate pressure cylinder system comprises an intermediate pressure cylinder 3, a third section steam extraction pipe, a fourth section steam extraction pipe and a fifth section steam extraction pipe;
the low-pressure cylinder system comprises a low-pressure cylinder 4, a sixth section of steam extraction pipe, a seventh section of steam extraction pipe and an eighth section of steam extraction pipe;
the deoxygenation system comprises a water feed pump 7 and a deoxygenator 8; the water outlet of the deaerator 8 is fixedly connected with the inlet of the water feeding pump 7;
the high-pressure heater system comprises three high-pressure heaters 5 and a water supply tee joint 6 which are connected in series, the three high-pressure heaters 5 connected in series are a first high-pressure heater, a second high-pressure heater and a third high-pressure heater in sequence, and steam inlet pipelines of the three high-pressure heaters 5 connected in series are provided with steam extraction electric doors 10 and steam extraction check valves 9; the inlet of the water supply tee joint 6 is fixedly connected with the outlet of the water supply pump 7, one outlet of the water supply tee joint 6 is fixedly connected with the inlet of the third high-pressure heater, and the other outlet of the water supply tee joint 6 is connected with the outlet of the first high-pressure heater;
the low-pressure heater system comprises four low-pressure heaters 13 connected in series; the four low-pressure heaters 13 connected in series are sequentially a first low-pressure heater, a second low-pressure heater, a third low-pressure heater and a fourth low-pressure heater, the four low-pressure heaters are all provided with a heater inlet electric door 11, a heater outlet electric door 12, a bypass and heater bypass electric door 14, and steam inlet pipelines of the four low-pressure heaters are all provided with a steam extraction electric door 10 and a steam extraction check valve 9; the outlet of the first low-pressure heater is fixedly connected with the water inlet of the deaerator 8; an inlet of the fourth low-pressure heater is fixedly connected with one outlet of a condensed water tee joint 15 of the condenser system;
the boiler system 1 comprises a water wall, a superheater and a reheater; the inlet of the water-cooled wall is fixedly connected with the outlet of the first high-pressure heater, and the outlet of the water-cooled wall is fixedly connected with the inlet of the superheater; the outlet of the superheater is fixedly connected with the inlet of the high-pressure cylinder 2 through a main steam pipeline; the outlet of the high-pressure cylinder 2 is fixedly connected with the inlet of the reheater; the outlet of the reheater is fixedly connected with the inlet of the intermediate pressure cylinder 3 through a reheating steam pipeline; the outlet of the intermediate pressure cylinder 3 is fixedly connected with the inlet of the low pressure cylinder 4 through a pipeline; the inlet of the low-pressure cylinder 4 is also respectively connected with a heat supply network heater 28 of a heat supply network heater system and a heat storage tank 32 of a heat storage tank system, the outlet of the low-pressure cylinder 4 is fixedly connected with a condenser 17 of the condenser system, and a low-pressure cylinder steam inlet to heat supply network heater and heat storage tank quick-closing door 24, a low-pressure cylinder steam inlet to heat supply network heater electric door and manual door 25 and a low-pressure cylinder steam inlet to heat storage tank electric door and manual door 26 are respectively arranged on the pipeline of the low-pressure cylinder 4;
the first section of steam extraction pipe is connected to a first high-pressure heater; the second section of steam extraction pipe is connected to a second high-pressure heater; the third section of steam extraction pipe is connected to a third high-pressure heater; the fourth-stage steam extraction pipe is connected to a deaerator 8; the fifth section of steam extraction pipe is divided into two parts, one part is connected to the first low-pressure heater 13, and the other part is used as a heating steam extraction pipe and is connected to the heat supply network heater 28; the sixth section of steam extraction pipe is connected to a second low-pressure heater; the seventh section of steam extraction pipe is connected to a third low-pressure heater; the eighth section of steam extraction pipe is connected to a fourth low-pressure heater;
the condenser system comprises a condensed water tee joint 15, a condensed water pump 16 and a condenser 17; a steam side inlet of the condenser 17 is fixedly connected with a steam exhaust port of the low-pressure cylinder 4, and a condensed water side outlet of the condenser 17 is fixedly connected with an inlet of the condensed water pump 16; the outlet of the condensate pump 16 is fixedly connected with the inlet of the condensate tee 15; the other outlet of the condensed water tee joint 15 is fixedly connected with a heat supply network circulating water side inlet of the heat storage tank 32 through a pipeline, a heat storage tank condensed water side inlet electric door and a manual door 18 are arranged on the condensed water tee joint 15 and the heat supply network circulating water side inlet pipeline of the heat storage tank 32, and a heat storage tank condensed water side outlet electric door and a manual door 19 are arranged on the condensed water tee joint 15 and the heat supply network circulating water side outlet pipeline of the heat storage tank 32;
the heat supply network heater system comprises a heat supply network heater 28, a heat supply network circulating water pump 37, a heat supply network tee joint 38 and a heat user 36; one path of heat source of the heat supply network heater 28 is communicated with a first low-pressure heater steam extraction pipe, the other path of heat source of the heat supply network heater 28 is steam inlet of the intermediate pressure cylinder 3, a drain port of the heat supply network heater 28 is connected to the deaerator 8, a water side inlet and outlet of the heat supply network heater 28 is provided with a heat supply network heater water side inlet electric door and a manual door 29, a drain port pipeline of the heat supply network heater 28 is provided with a heat supply network heater drain electric door 27, and a water outlet pipeline of the heat supply network heater 28 is provided with a heat supply network heater water side outlet electric door and a manual door 30; an inlet of the heat supply network circulating water pump 37 is fixedly connected with the heat consumer 36, and an outlet of the heat supply network circulating water pump 37 is fixedly connected with an inlet of the heat supply network tee joint 38; one outlet of the heat supply network tee joint 38 is fixedly connected with the water side inlet of the heat supply network heater 28, and the other outlet of the heat supply network tee joint 38 is fixedly connected with the water side inlet of the heat storage tank 32;
the heat storage tank system comprises a surface heat exchange heat storage tank 32, the heat source of the heat storage tank 32 is the steam inlet of the low-pressure cylinder 4, the drain of the heat storage tank 32 is connected to the deaerator 8, the water side outlet of the heat storage tank 32 is fixedly connected with a heat consumer 36, the water side inlet of the heat storage tank 32 is also connected with the outlet of one side of a heat network tee joint 38, the heat network circulating water side inlet of the heat storage tank 32 is provided with a heat storage tank heat network circulating water side inlet electric door and a manual door 35, the heat network circulating water side outlet of the heat storage tank 32 is provided with a heat storage tank heat network circulating water side outlet electric door 31, the drain pipeline of the heat storage tank 32 is provided with a heat storage tank drain electric door 34, and the steam side inlet of the heat storage tank 32 is provided with.
And the first section of steam extraction pipe, the second section of steam extraction pipe, the third section of steam extraction pipe, the fourth section of steam extraction pipe and the fifth section of steam extraction pipe are all provided with a steam extraction check valve 9 and a steam extraction electric valve 10. The steam inlet pipeline of the deaerator is provided with a steam extraction electric door and a steam extraction check valve.
The fifth section of steam extraction pipe is also provided with a fifth section of steam extraction to heat supply network heater steam extraction check valve 20, a fifth section of steam extraction to heat supply network heater steam extraction quick-closing door 21, a fifth section of steam extraction to heat supply network heater steam extraction electric door 22 and a fifth section of steam extraction to heat supply network heater steam extraction manual door 23 on a pipeline connected with the heat supply network heater 28.
And the steam inlet pipeline of the deaerator 8 is provided with a steam extraction check valve 9 and a steam extraction electric valve 10.
In the heating period, an electric door and a manual door 18 at the condensed water side inlet of a heat storage tank and an electric door and a manual door 19 at the condensed water side outlet of the heat storage tank are closed, a drainage electric door 27 of a heat supply network heater, an electric door and a manual door 29 at the water side inlet of the heat supply network heater and an electric door and a manual door 30 at the water side outlet of the heat supply network heater are opened, a heat supply network circulating water pump 37 is started, and the heat supply network heater 28 is ensured to be normally put into operation in winter.
When the load of the power grid is low, the electric door and the manual door 31 for the circulating water side outlet of the heat storage tank heat supply network and the electric door and the manual door 35 for the circulating water side inlet of the heat storage tank heat supply network are closed, and the electric door 33 for the steam side inlet of the heat storage tank and the water drainage electric door 34 of the heat storage tank are opened, so that the heat storage tank 32 is ensured to be in a heat storage and non-heat release state. Opening a fifth steam extraction to heating network heater steam extraction check valve 20, a fifth steam extraction to heating network heater steam extraction quick-closing door 21, a fifth steam extraction to heating network heater steam extraction electric door 22 and a fifth steam extraction to heating network heater steam extraction manual door 23, so that part of heat sources of a heating network heater 28 come from the fifth steam extraction; and opening a low-pressure cylinder steam inlet to a heat supply network heater and a heat storage tank quick-closing door 24 to cut off the low-pressure cylinder, adjusting the opening degrees of a low-pressure cylinder steam inlet to a heat supply network heater electric door and a manual door 25 and a low-pressure cylinder steam inlet to a heat storage tank electric door and a manual door 26 according to the requirement of a heat user 36, so that part of the low-pressure cylinder steam inlet enters a heat supply network heater 28, and the other part of the low-pressure cylinder steam inlet enters a heat storage tank 32, thereby realizing cutting off the low-pressure cylinder and reducing the generated energy, and simultaneously utilizing the heat storage tank 32 to receive part of the low-pressure cylinder steam inlet, and relieving the impact on the heat supply network heater after a.
And when the load of the power grid is in a peak, opening the electric door and the manual door 31 for the circulating water side outlet of the heat storage tank heat supply network and the electric door and the manual door 35 for the circulating water side inlet of the heat storage tank heat supply network, and closing the electric door 33 for the steam side inlet of the heat storage tank and the water drainage electric door 34 of the heat storage tank to ensure that the heat storage tank 32 is in a heat release and non-heat storage state. Closing the steam inlet to the heating network heater and the heat storage tank quick-closing door 24 of the low-pressure cylinder, quitting the operation of cutting off the low-pressure cylinder 4, supplying heat to a heat user 36 by using heat stored in the heat storage tank 32 during the load valley of the power grid, determining the opening 23 of a fifth steam extraction check valve 20, a fifth steam extraction check valve 21, a fifth steam extraction check valve 22 and a fifth steam extraction check valve 23 according to the heat demand of the heat user 36, and replacing part of the fifth steam extraction check valve with the heat of the heat storage tank 32 to supply heat to the heating network heater, so that the heat demand of the heat user 32 is met, the generated energy is increased by reducing the steam extraction from the fifth steam extraction check valve to the heating network heater, and the power load demand of the power grid is met.
In the non-heating period, a fifth section of steam extraction to heat supply network heater steam extraction check valve 20, a fifth section of steam extraction to heat supply network heater steam extraction quick-closing door 21, a fifth section of steam extraction to heat supply network heater steam extraction electric door 22, a fifth section of steam extraction to heat supply network heater steam extraction manual door 23, a heat supply network heater drainage electric door 27, a heat supply network heater water side inlet electric door and manual door 29, a heat supply network heater water side outlet electric door and manual door 30 and a low-pressure cylinder steam inlet to heat supply network heater electric door and manual door 25 are closed, and a heat supply network heater heat source is cut off; and closing the electric door and the manual door 31 at the side outlet of the heat storage tank heat supply network circulating water and the electric door and the manual door 35 at the side inlet of the heat storage tank heat supply network circulating water to stop the heat storage tank 32 from supplying heat to the outside. When the load of the power grid is low, opening a low-pressure cylinder steam inlet to heat grid heater and heat storage tank quick-closing door 24 and a low-pressure cylinder steam inlet to heat storage tank electric door and manual door 26 to cut off the low-pressure cylinder 4, storing redundant heat cut off by the low-pressure cylinder 4 in a heat storage tank 32, and reducing the generating capacity of the unit by reducing the steam inlet of the low-pressure cylinder 4; at the time of the electric wire netting load peak, close low pressure cylinder admission to heat supply network heater and heat accumulation jar and close door 24 and low pressure cylinder admission to heat accumulation jar electrically operated gate and hand-operated gate 26 soon, withdraw from and excise 4 operations of low pressure cylinder, open heat accumulation jar condensate water side import electrically operated gate and hand-operated gate 18 and heat accumulation jar condensate water side export electrically operated gate and hand-operated gate 19, heat the condensate water with heat accumulation jar 32 storage, through improving some or some low pressure feed water heater 13 of reasonable excision of the condensate water temperature that gets into low pressure feed water heater, reduce the steam extraction of low pressure feed water heater system, thereby increase the generated energy of unit.
Claims (10)
1. Zero power of low pressure jar, peak shaver system of heat accumulation jar and low pressure heater coupling, characterized by: comprises a boiler system (1), a high-pressure cylinder system, a medium-pressure cylinder system, a low-pressure cylinder system, a high-pressure heater system, a deoxidization system, a low-pressure heater system, a condenser system, a heat supply network heater system and a heat storage tank system,
the high-pressure cylinder system comprises a high-pressure cylinder (2), a first section of steam extraction pipe and a second section of steam extraction pipe;
the intermediate pressure cylinder system comprises an intermediate pressure cylinder (3), a third section steam extraction pipe, a fourth section steam extraction pipe and a fifth section steam extraction pipe;
the low-pressure cylinder system comprises a low-pressure cylinder (4), a sixth section of steam extraction pipe, a seventh section of steam extraction pipe and an eighth section of steam extraction pipe;
the oxygen removal system comprises a water feed pump (7) and an oxygen remover (8); the water outlet of the deaerator (8) is fixedly connected with the inlet of the water feeding pump (7);
the high-pressure heater system comprises three high-pressure heaters (5) and a water supply tee joint (6) which are connected in series, wherein the three high-pressure heaters (5) connected in series are a first high-pressure heater, a second high-pressure heater and a third high-pressure heater in sequence; the inlet of the water supply tee joint (6) is fixedly connected with the outlet of the water supply pump (7), one outlet of the water supply tee joint (6) is fixedly connected with the inlet of the third high-pressure heater, and the other outlet of the water supply tee joint (6) is connected with the outlet of the first high-pressure heater;
the low-pressure heater system comprises four low-pressure heaters (13) connected in series; the four low-pressure heaters (13) connected in series are sequentially a first low-pressure heater, a second low-pressure heater, a third low-pressure heater and a fourth low-pressure heater, the four low-pressure heaters are all provided with a heater inlet electric door (11), a heater outlet electric door (12), a bypass and a heater bypass electric door (14), and steam inlet pipelines of the four low-pressure heaters are all provided with a steam extraction electric door (10) and a steam extraction check valve (9); the outlet of the first low-pressure heater is fixedly connected with the water inlet of the deaerator (8); the inlet of the fourth low-pressure heater is fixedly connected with one outlet of a condensed water tee joint (15) of the condenser system;
the boiler system (1) comprises a water wall, a superheater and a reheater; the inlet of the water-cooled wall is fixedly connected with the outlet of the first high-pressure heater, and the outlet of the water-cooled wall is fixedly connected with the inlet of the superheater; the outlet of the superheater is fixedly connected with the inlet of the high-pressure cylinder (2) through a main steam pipeline; the outlet of the high-pressure cylinder (2) is fixedly connected with the inlet of the reheater; the outlet of the reheater is fixedly connected with the inlet of the intermediate pressure cylinder (3) through a reheating steam pipeline; the outlet of the intermediate pressure cylinder (3) is fixedly connected with the inlet of the low pressure cylinder (4) through a pipeline; the inlet of the low-pressure cylinder (4) is also respectively connected with a heat supply network heater (28) of a heat supply network heater system and a heat storage tank (32) of a heat storage tank system, and the outlet of the low-pressure cylinder (4) is fixedly connected with a condenser (17) of a condenser system;
the first section of steam extraction pipe is connected to a first high-pressure heater; the second section of steam extraction pipe is connected to a second high-pressure heater; the third section of steam extraction pipe is connected to a third high-pressure heater; the fourth-section steam extraction pipe is connected to a deaerator (8); the fifth section of steam extraction pipe is divided into two parts, one part is connected to the first low-pressure heater (13), and the other part is used as a heating steam extraction pipe and is connected to a heat supply network heater (28); the sixth section of steam extraction pipe is connected to a second low-pressure heater; the seventh section of steam extraction pipe is connected to a third low-pressure heater; the eighth section of steam extraction pipe is connected to a fourth low-pressure heater;
the condenser system comprises a condensed water tee joint (15), a condensed water pump (16) and a condenser (17); a steam side inlet of the condenser (17) is fixedly connected with a steam exhaust port of the low pressure cylinder (4), and a condensed water side outlet of the condenser (17) is fixedly connected with an inlet of a condensed water pump (16); an outlet of the condensed water pump (16) is fixedly connected with an inlet of a condensed water tee joint (15); the other outlet of the condensed water tee joint (15) is fixedly connected with a circulating water side inlet of a heat supply network of the heat storage tank (32) through a pipeline;
the heat supply network heater system comprises a heat supply network heater (28), a heat supply network circulating water pump (37), a heat supply network tee joint (38) and a heat user (36); one path of heat source of the heat supply network heater (28) is communicated with a first low-pressure heater steam extraction pipe, the other path of heat source of the heat supply network heater (28) is steam inlet of the intermediate pressure cylinder (3), and a drain port of the heat supply network heater (28) is connected to the deaerator (8); an inlet of the heat supply network circulating water pump (37) is fixedly connected with a heat user (36), and an outlet of the heat supply network circulating water pump (37) is fixedly connected with an inlet of a heat supply network tee joint (38); one outlet of the heat supply network tee joint (38) is fixedly connected with a water side inlet of the heat supply network heater (28), and the other outlet of the heat supply network tee joint (38) is fixedly connected with a water side inlet of the heat storage tank (32);
the heat storage tank system comprises a heat storage tank (32), the heat source of the heat storage tank (32) is the steam inlet of the low-pressure cylinder (4), a drain port of the heat storage tank (32) is connected to the deaerator (8), a water side outlet of the heat storage tank (32) is fixedly connected with a heat consumer (36), and a water side inlet of the heat storage tank (32) is fixedly connected with a side outlet of the heat network tee joint (38).
2. The low pressure cylinder zero force, thermal storage tank and low pressure heater coupled peaking system of claim 1, further comprising: and steam inlet pipelines of the high-pressure heater (5) are provided with a steam extraction electric door (10) and a steam extraction check valve (9).
3. The low pressure cylinder zero force, thermal storage tank and low pressure heater coupled peaking system of claim 1, further comprising: and pipelines for connecting the low-pressure cylinder (4) with the heat supply network heater (28) and the heat storage tank (32) are respectively provided with a low-pressure cylinder steam inlet to heat supply network heater and heat storage tank quick-closing door (24), a low-pressure cylinder steam inlet to heat supply network heater electric door and manual door (25) and a low-pressure cylinder steam inlet to heat storage tank electric door and manual door (26).
4. The low pressure cylinder zero force, thermal storage tank and low pressure heater coupled peaking system of claim 1, further comprising: and a heat storage tank condensed water side inlet electric door and a manual door (18) are arranged on a heat supply network circulating water side inlet pipeline of the condensed water tee joint (15) and the heat storage tank (32), and a heat storage tank condensed water side outlet electric door and a manual door (19) are arranged on a heat supply network circulating water side outlet pipeline of the condensed water tee joint (15) and the heat storage tank (32).
5. The low pressure cylinder zero force, thermal storage tank and low pressure heater coupled peaking system of claim 1, further comprising: the water side inlet and outlet of the heat supply network heater (28) are provided with a water side inlet electric door and a hand door (29) of the heat supply network heater, a drain opening pipeline of the heat supply network heater (28) is provided with a drain electric door (27) of the heat supply network heater, and a water outlet pipeline of the heat supply network heater (28) is provided with a water side outlet electric door and a hand door (30) of the heat supply network heater.
6. The low pressure cylinder zero force, thermal storage tank and low pressure heater coupled peaking system of claim 1, further comprising: the heat storage tank (32) is a surface type heat exchange heat storage tank.
7. The low pressure cylinder zero force, thermal storage tank and low pressure heater coupled peaking system of claim 1 or 6, further comprising: the heat supply network circulating water side inlet of the heat storage tank (32) is provided with a heat storage tank heat supply network circulating water side inlet electric door and a manual door (35), the heat supply network circulating water side outlet of the heat storage tank (32) is provided with a heat storage tank heat supply network circulating water side outlet electric door (31), a drain pipe of the heat storage tank (32) is provided with a heat storage tank drain electric door (34), and a steam side inlet of the heat storage tank (32) is provided with a heat storage tank steam side inlet electric door (33).
8. The low pressure cylinder zero force, thermal storage tank and low pressure heater coupled peaking system of claim 1, further comprising: and the first section of steam extraction pipe, the second section of steam extraction pipe, the third section of steam extraction pipe, the fourth section of steam extraction pipe and the fifth section of steam extraction pipe are all provided with a steam extraction check valve (9) and a steam extraction electric valve (10).
9. The low pressure cylinder zero force, thermal storage tank and low pressure heater coupled peaking system of claim 8, further comprising: and a pipeline of the fifth-section steam extraction pipe connected with the heat supply network heater (28) is also provided with a fifth-section steam extraction to heat supply network heater steam extraction check valve (20), a fifth-section steam extraction to heat supply network heater steam extraction quick-closing door (21), a fifth-section steam extraction to heat supply network heater steam extraction electric door (22) and a fifth-section steam extraction to heat supply network heater steam extraction manual door (23).
10. The low pressure cylinder zero force, thermal storage tank and low pressure heater coupled peaking system of claim 1, further comprising: and the steam inlet pipeline of the deaerator (8) is provided with a steam extraction check valve (9) and a steam extraction electric valve (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110030060.8A CN112727556A (en) | 2021-01-11 | 2021-01-11 | Low-pressure cylinder zero-output and heat storage tank and low-pressure heater coupled peak shaving system |
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| CN202110030060.8A CN112727556A (en) | 2021-01-11 | 2021-01-11 | Low-pressure cylinder zero-output and heat storage tank and low-pressure heater coupled peak shaving system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404563A (en) * | 2021-06-18 | 2021-09-17 | 东方电气集团东方汽轮机有限公司 | Low-pressure cylinder cutting heat supply unit low-heating and back-heating system |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404563A (en) * | 2021-06-18 | 2021-09-17 | 东方电气集团东方汽轮机有限公司 | Low-pressure cylinder cutting heat supply unit low-heating and back-heating system |
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