CN110500637B - Heat supply network head station system utilizing exhaust steam of condenser of thermal power plant - Google Patents
Heat supply network head station system utilizing exhaust steam of condenser of thermal power plant Download PDFInfo
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- CN110500637B CN110500637B CN201910564742.XA CN201910564742A CN110500637B CN 110500637 B CN110500637 B CN 110500637B CN 201910564742 A CN201910564742 A CN 201910564742A CN 110500637 B CN110500637 B CN 110500637B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 113
- 230000001502 supplementing effect Effects 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 8
- 238000005202 decontamination Methods 0.000 claims description 3
- 230000003588 decontaminative effect Effects 0.000 claims description 3
- 230000002209 hydrophobic effect Effects 0.000 claims description 3
- 230000003020 moisturizing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
A heat supply network head station system utilizing exhaust steam of a condenser of a thermal power plant comprises a heat supply network water supplementing system and a heat supply network head station; the heat supply network water supplementing system comprises a condenser and a condensate pump, a heat well of the condenser is connected with a heat supply network water supplementing pipe, the condenser is connected with the condensate pump through a pipeline, an outlet of the condensate pump is connected with a heat supply network water return pipeline, and the heat supply network water return pipeline is connected with a heat supply network first station. The heat supply network head station system is not provided with the heat supply network deaerator and the water supplementing pump, the water supplementing of the heat supply network water supplementing pipe is directly supplemented to the condenser hot well, the water is boosted by the condensate pump and then enters the heat supply network water return pipeline, and the water enters the heat supply network head station through the heat supply network water return pipeline.
Description
Technical Field
The invention relates to a heat supply network head station system, in particular to a heat supply network head station system for utilizing exhaust steam of a condenser of a thermal power plant.
Background
In recent years, with the continuous deepening of the innovation of the economic system of China, the economic strength of China is continuously enhanced, the living standard of people is higher and higher, and the heating heat load of residents is gradually increased. However, at present, small boilers are mainly adopted for urban heating. In order to improve the quality of urban atmospheric environment, the country goes out of the country successively and issues a notification of the limit-period rectification shut-down of the civil small-sized boiler, and most of the civil small-sized boilers are in the rectification shut-down range.
The exhaust steam heat rejection loss of the condenser of the thermal power plant is the energy loss with the largest proportion in the thermodynamic system of the power plant, so that the effective utilization of the heat loss has very important significance. The condenser exhaust steam heating heat supply network water supplementing and conventional heat supply network head station are combined to perform central heating, so that the power supply standard coal consumption of the power plant can be further reduced under the condition of ensuring the power generation capacity of the power plant and the heat user demand, the pollutant discharge amount is reduced, the national energy-saving and environment-friendly theme is met, and the economic benefit and the environment-friendly benefit are obvious.
Disclosure of Invention
The invention aims to provide a heat supply network first station system utilizing exhaust steam of a condenser of a thermal power plant, which can reduce equipment investment of a heat supply network deaerator and a water supplementing pump, can reduce steam extraction quantity of a steam turbine, can correspondingly increase generating capacity, and achieves the effects of energy conservation, power increase and low investment.
The invention adopts the following technical scheme:
A heat supply network head station system utilizing exhaust steam of a condenser of a thermal power plant comprises a heat supply network water supplementing system and a heat supply network head station;
The heat supply network water supplementing system comprises a condenser and a condensate pump, wherein a heat well of the condenser is connected with a heat supply network water supplementing pipe, the condenser is connected with the condensate pump through a pipeline, an outlet of the condensate pump is connected with a heat supply network water return pipeline, and the heat supply network water return pipeline is connected with a heat supply network head station.
The heat supply network head station comprises a heat supply network circulating water pump system connected with a heat supply network water return pipeline, a heat supply network heater system connected with the heat supply network circulating water pump system and a drainage system connected with the heat supply network heater system; the drainage system comprises a drainage tank and a drainage pump;
The heat supply network circulating water pump system comprises a plurality of heat supply network circulating water pumps and an electric standby circulating water pump which are connected with a heat supply network water return pipeline, wherein the heat supply network circulating water pumps and the electric standby circulating water pump are connected in parallel, and each heat supply network circulating water pump is driven by a back pressure steam turbine;
The heat supply network heater system comprises a plurality of low-pressure heat supply network heaters and a plurality of high-pressure heat supply network heaters; the heat release side heat exchange inlets of the plurality of low-pressure heat supply network heaters are connected with the outlet of the back pressure turbine, and the heat release side outlets of the plurality of low-pressure heat supply network heaters are connected with the drainage system; the heat absorption side inlets of the low-pressure heat supply network heaters are connected with the outlets of the heat supply network circulating water pumps and the electric standby circulating water pump, the heat absorption side outlets of the low-pressure heat supply network heaters are connected with the heat absorption side inlets of the high-pressure heat supply network heaters, and the heat absorption side outlets of the high-pressure heat supply network heaters are connected with the heat supply network water supply pipe;
The drainage system comprises a drainage tank, an inlet of the drainage tank is connected with a plurality of low-pressure heat supply network heaters and a plurality of heat release side outlets of the high-pressure heat supply network heaters, an outlet of the drainage tank is connected with a plurality of drainage pumps which are connected in parallel, and an outlet of the drainage pump is connected with a condensed water pipeline.
And an inlet of the back pressure turbine is connected with a heating steam extraction pipeline.
The heat release side inlets of the high-pressure heat supply network heaters are connected with a heating steam extraction pipeline; the outlets of the heat release sides of the high-pressure heat supply network heaters are connected with the hydrophobic tank.
The heat supply network circulating water pump comprises four heat supply network circulating water pumps, and the low-pressure heat supply network heaters comprise two heat supply network circulating water pumps.
And a heat supply network dirt removing filter is arranged between the heat supply network water return pipeline and the heat supply network circulating water pump.
The invention has the beneficial effects that:
The heat supply network head station system is not provided with the heat supply network deaerator and the water supplementing pump, the water supplementing of the heat supply network water supplementing pipe is directly supplemented to the condenser hot well, the water is boosted by the condensate pump and then enters the heat supply network water return pipeline, and the water enters the heat supply network head station through the heat supply network water return pipeline.
Drawings
Fig. 1 is a schematic thermodynamic system diagram of a conventional thermal power plant.
Fig. 2 is a system diagram of the present invention.
Wherein, 1-condenser; 2-a condensate pump; 3-a water supplementing pipe of the heat supply network; 4-a heat supply network return pipe; 5-a heat supply network circulating water pump; 6-back pressure steam turbine; 7-an electric standby circulating water pump; 8-a low pressure heater; 9-a high pressure heater; 10-a hydrophobic tank; 11-a drainage pump; 12-a condensed water pipeline; 13-a heat supply network water supply pipe; 14-a heat supply network decontamination filter; 15-steam seal heater.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
The invention provides a heat supply network head station system utilizing exhaust steam of a condenser of a thermal power plant, which comprises a heat supply network water supplementing system and a heat supply network head station.
Wherein, heat supply network moisturizing system includes condenser 1 and condensate pump 2, and heat supply network moisturizing pipe 3 is connected to the hot well of condenser 1, and condensate pump 2 is passed through the pipeline connection to the hot well export of condenser 1, and condensate pump 2 pumps the water pump that pumps to heat supply network return water pipe 4, and heat supply network return water pipe 4 connects the heat supply network head station, and heat supply network deaerator and moisturizing pump are no longer established to the heat supply network head station.
As shown in fig. 1, the heat supply network head station comprises a heat supply network circulating water pump system connected with a heat supply network water return pipeline 4, a heat supply network heater system connected with the heat supply network circulating water pump system and a drainage system connected with the heat supply network heater system; the drainage system comprises a drainage tank 10 and a drainage pump 11.
The heat supply network circulating water pump system comprises a plurality of heat supply network circulating water pumps 5 and an electric circulating water pump 7 which are connected with a heat supply network water return pipeline 4, wherein the plurality of heat supply network circulating water pumps 5 and the electric standby circulating water pump 7 are connected in parallel, water in the heat supply network water return pipeline 4 enters the heat supply network heater system through the heat supply network circulating water pumps 5 and the electric standby circulating water pump 7, and each heat supply network circulating water pump 5 is driven through a back pressure steam turbine 6; the back pressure turbine 6 is driven by heating extraction, i.e. the inlet of the back pressure turbine 6 is connected with a heating extraction pipeline. In the system shown in fig. 2, the heat supply network circulating water pump system comprises four heat supply network circulating water pumps 5 and one electric circulating water pump 7, the electric standby circulating water pump 7 is used as a standby water pump, and when the heat supply network circulating water pump fails, the electric standby circulating water pump 7 can be used.
The heat supply network circulating water pump 5 is preferably a pneumatic circulating water pump.
The heating network heater system comprises a plurality of low-pressure heating network heaters 8 and a plurality of high-pressure heating network heaters 9; the exothermic side inlets of the plurality of low-pressure heat supply network heaters 8 are connected with the outlet of the back pressure turbine 6, and the exothermic side outlets of the plurality of low-pressure heat supply network heaters 8 are connected with the drainage system; the heat absorption side inlets of the low-pressure heat supply network heaters 8 are connected with the outlets of the heat supply network circulating water pumps 5 and the electric standby circulating water pump 7, the heat absorption side outlets of the low-pressure heat supply network heaters 8 are connected with the heat absorption side inlets of the high-pressure heat supply network heaters 9, and the heat absorption side outlets of the high-pressure heat supply network heaters 9 are connected with the heat supply network water supply pipe 13.
As shown in fig. 2, the heat supply network head station is provided with two low-pressure heat supply network heaters 8 and four high-pressure heat supply network heaters 9, the heat release side inlet of each low-pressure heat supply network heater 8 is connected with the outlet of two back pressure turbines 6, and the heat release side inlet pipelines of the two low-pressure heat supply network heaters 8 are communicated through a bypass pipeline. The heat release side inlets of the four high-pressure heat supply network heaters 9 are connected with a heating steam extraction pipeline.
The drainage system comprises a drainage tank 10, wherein an inlet of the drainage tank 10 is connected with a plurality of low-pressure heat supply network heaters 8 and a plurality of heat release side outlets of the high-pressure heat supply network heaters 9, an outlet of the drainage tank 10 is connected with a plurality of drainage pumps 11 which are connected in parallel, and an outlet of the drainage pumps 11 is connected with a condensed water pipeline 12. The number of the drainage pumps is 6.
The heat supply network water after the pressure of the condensate pump 2 is increased can be merged with the heat supply network backwater after passing through the heat supply network circulating water pump through a bypass pipeline and then enter the low-pressure heater.
The invention also provides a common filter-heat supply network decontamination filter 14 between the heat supply network backwater pipeline 4 and the heat supply network circulating water pump 5, which is used for filtering heat supply network backwater.
The heat supply network water supplementing 3 of the heat supply network water supplementing pipeline is directly supplemented to the heat well of the condenser 1, is boosted by the condensate pump 2 and enters the heat supply network water return pipeline 4 to be converged with heat supply network water returned by the heat supply network dirt removing filter 14, is heated by the water inlet of the low-pressure heater 8 after being converged by the heat supply network circulating water pump 5, is discharged to the water inlet of the high-pressure heat supply network heater 9 after being heated, and is used by a heat supply user.
The invention has reasonable structure, is simple and convenient, realizes the effective utilization of the exhaust steam of the condenser of the thermal power plant, and has higher value.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention.
Claims (3)
1. A heat supply network head station system utilizing exhaust steam of a condenser of a thermal power plant is characterized in that: the system comprises a heat supply network water supplementing system and a heat supply network head station;
the heat supply network water supplementing system comprises a condenser (1) and a condensate pump (2), wherein a heat well of the condenser (1) is connected with a heat supply network water supplementing pipe (3), the condenser (1) is connected with the condensate pump (2) through a pipeline, an outlet of the condensate pump (2) is connected with a heat supply network water return pipeline (4), and the heat supply network water return pipeline (4) is connected with a heat supply network head station;
the heat supply network head station comprises a heat supply network circulating water pump system connected with a heat supply network water return pipeline (4), a heat supply network heater system connected with the heat supply network circulating water pump system and a drainage system connected with the heat supply network heater system; the drainage system comprises a drainage tank (10) and a drainage pump (11);
The heat supply network circulating water pump system comprises a plurality of heat supply network circulating water pumps (5) and an electric standby circulating water pump (7) which are connected with a heat supply network water return pipeline (4), wherein the heat supply network circulating water pumps (5) and the electric standby circulating water pump (7) are connected in parallel, and each heat supply network circulating water pump (5) is driven by a back pressure steam turbine (6);
The heat supply network heater system comprises a plurality of low-pressure heat supply network heaters (8) and a plurality of high-pressure heat supply network heaters (9); the heat release side heat exchange inlets of the plurality of low-pressure heat supply network heaters (8) are connected with the outlet of the back pressure turbine (6), and the heat release side outlets of the plurality of low-pressure heat supply network heaters (8) are connected with the drainage system; the heat absorption side inlets of the low-pressure heat supply network heaters (8) are connected with the outlets of the heat supply network circulating water pumps (5) and the electric standby circulating water pump (7), the heat absorption side outlets of the low-pressure heat supply network heaters (8) are connected with the heat absorption side inlets of the high-pressure heat supply network heaters (9), and the heat absorption side outlets of the high-pressure heat supply network heaters (9) are connected with the heat supply network water supply pipe;
The drainage system comprises a drainage tank (10), wherein an inlet of the drainage tank (10) is connected with a plurality of low-pressure heat supply network heaters (8) and a plurality of heat release side outlets of the high-pressure heat supply network heaters (9), an outlet of the drainage tank (10) is connected with a plurality of drainage pumps (11) which are connected in parallel, and an outlet of the drainage pumps (11) is connected with a condensed water pipeline (12);
An inlet of the back pressure turbine (6) is connected with a heating steam extraction pipeline;
the heat release side inlets of the high-pressure heat supply network heaters (9) are connected with a heating steam extraction pipeline; the outlets of the heat release sides of the high-pressure heat supply network heaters (9) are connected with a hydrophobic tank (10).
2. The heat supply network head station system utilizing exhaust steam of condenser of thermal power plant according to claim 1, wherein:
the heat supply network circulating water pump (5) comprises four low-pressure heat supply network heaters (8) and two low-pressure heat supply network heaters.
3. The heat supply network head station system utilizing exhaust steam of condenser of thermal power plant according to claim 1, wherein:
A heat supply network decontamination filter (14) is further arranged between the heat supply network water return pipeline (4) and the heat supply network circulating water pump (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910564742.XA CN110500637B (en) | 2019-06-27 | 2019-06-27 | Heat supply network head station system utilizing exhaust steam of condenser of thermal power plant |
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| CN201910564742.XA CN110500637B (en) | 2019-06-27 | 2019-06-27 | Heat supply network head station system utilizing exhaust steam of condenser of thermal power plant |
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| CN110500637A CN110500637A (en) | 2019-11-26 |
| CN110500637B true CN110500637B (en) | 2024-05-28 |
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| CN110761850A (en) * | 2019-11-28 | 2020-02-07 | 华电郑州机械设计研究院有限公司 | Peak shaving reconstruction system based on external heat supply unit with two-stage series bypass |
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