CN105698241A - Operation method of heating supply network circulating water pumps of 150 MW high-back-pressure heating supply unit - Google Patents
Operation method of heating supply network circulating water pumps of 150 MW high-back-pressure heating supply unit Download PDFInfo
- Publication number
- CN105698241A CN105698241A CN201610062058.8A CN201610062058A CN105698241A CN 105698241 A CN105698241 A CN 105698241A CN 201610062058 A CN201610062058 A CN 201610062058A CN 105698241 A CN105698241 A CN 105698241A
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- China
- Prior art keywords
- heat
- supply network
- circulation pump
- steam
- heating supply
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- 238000000034 method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 24
- 238000010438 heat treatment Methods 0.000 title abstract description 23
- 230000005611 electricity Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- 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
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- 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
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- 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
- F24D3/105—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system pumps combined with multiple way valves
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- 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
-
- 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
- F24D2200/00—Heat sources or energy sources
- F24D2200/13—Heat from a district heating network
-
- 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
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/0271—Valves
Landscapes
- 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)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to the field of heating supply unit circulating water running and particularly discloses an operation method of heating supply network circulating water pumps of a high-back-pressure heating supply unit. According to the operation method of the heating supply network circulating water pumps of the 150 MW high-back-pressure heating supply unit, the steam-driven heating supply network circulating water pump connected with a small steam turbine and a condenser in parallel is included. The operation method is characterized in that the power-driven heating supply network circulating water pump connected with the steam-driven heating supply network circulating water pump in parallel is arranged on a heating supply network water outlet pipeline of the condenser and the steam-driven heating supply network circulating water pump; the capacity of the power-driven heating supply network circulating water pump and the capacity of the steam-driven heating supply network circulating water pump are similar or equal. According to the method, the structure is simple, design is reasonable, operation safety of the high-back-pressure unit and a heating supply network system at low thermal loads during the initial and terminal stages of heating supply is guaranteed, the benefits of a plant is maximized during the period of heating supply, and the method is suitable for wide application and popularization.
Description
(1) technical field
The present invention relates to thermal power plant unit recirculated water and run field, particularly to a kind of method that high back pressure thermal power plant unit circulation pump of heat-supply network runs。
(2) background technology
Along with the management of atmospheric pollution is strengthened by country, and the popularization to energy-saving and emission-reduction project, high back pressure circulating water heating has been the emphasis energy-saving and emission-reduction project that power industry is promoted in central heating area。
High back pressure circulating water heating can effectively utilize the cold source energy of turbine discharge, improves Unit Economic benefit。After unit carries out high back pressure circulating water heating transformation, heat supply phase unit runs by " electricity determining by heat " mode, and unit electric load height depends on load of heat。Thermal source enterprise is energy-saving and cost-reducing, heat supply initial station circulation pump of heat-supply network adopts pneumatic pump, and heat heat supply network recirculated water by circulating pump small steam turbine exhaust steam, owing to the steam discharge of circulation pump of heat-supply network heats hot net water, circulating pump small turbine operation can squeeze the thermic load of big steam turbine。In preliminary heating period and latter stage, heat supply influenced by ambient temperature meets relatively low, and area of heat-supply service is insufficient to again greatly, causes improved high back pressure main steam turbine thermic load less, makes steam turbine run in the electric shock district of high back pressure low flow rate condition, unit safety is brought hidden danger；And when steam turbine operation is under low flow rate condition, boiler load also decreases, even into throwing oil operating condition, affect unit macroeconomic；Additionally, when pumps for hot water supply net small turbine fault trip, the big steam turbine cycle water yield reduces rapidly, causes exhaust steam pressure to rise rapidly, big steam turbine time serious, even can be caused to trip。
(3) summary of the invention
The present invention is in order to make up the deficiencies in the prior art, it is provided that a kind of method that 150MW high back pressure thermal power plant unit circulation pump of heat-supply network easy and simple to handle, applying flexible, high financial profit runs。
The present invention is achieved through the following technical solutions:
A kind of method that 150MW high back pressure thermal power plant unit circulation pump of heat-supply network runs, including the steam-operating circulation pump of heat-supply network being connected in parallel small turbine and condenser, it is characterized in that: described condenser with the heat supply network outlet conduit of steam-operating circulation pump of heat-supply network is provided with the electronic circulation pump of heat-supply network in parallel with steam-operating circulation pump of heat-supply network, the capacity of electronic circulation pump of heat-supply network and steam-operating circulation pump of heat-supply network is similar or identical；When latter stage at the beginning of heat supply, area of heat-supply service was more than 11,460,000 square metres, opening steam-operating circulation pump of heat-supply network, electronic circulation pump of heat-supply network disables；When area of heat-supply service is below 11,460,000 square metres, steam-operating circulation pump of heat-supply network disables, and starts electronic circulation pump of heat-supply network；Area of heat-supply service below 11,460,000 square metres, extraneous heat supply network thermic load is when increasing to 228MW, opens steam-operating circulation pump of heat-supply network, until when heat supply network thermic load reaches 298MW, closing electronic circulation pump of heat-supply network。
The present invention solves latter stage at the beginning of heat supply, when thermic load is low, high back pressure heat supply steam turbine runs and there is potential safety hazard and the low problem of economic benefit, electronic, the steam-operating circulation pump of heat-supply network back-up system each other in design heat supply initial station, increases the 8000t/h electronic circulation pump of heat-supply network similar with steam-operating circulation pump of heat-supply network capacity。
The more excellent scheme of the present invention is:
Described heat supply network outlet conduit it is provided with the control valve A of steam-operating circulation pump of heat-supply network, valve B and controls the valve C of electronic circulation pump of heat-supply network, valve D, it is simple to controlling the switching of two water circulating pumps。
The air intake of described condenser connects big gas turbine exhaust gas pipe, is heated by the steam discharge with steam turbine。
Present configuration is simple, reasonable in design, not only ensure that the safety that when latter stage at the beginning of heat supply, thermic load was relatively low, High Back Pressure Steam Turbine Units and heat network system run, also achieves maximizing the benefits in heat supply phase factory, be suitable to wide popularization and application。
(4) accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated。
Fig. 1 is the equipment connection structure schematic diagram of the present invention。
In figure, 1 small turbine, 2 condensers, 3 steam-operating circulation pump of heat-supply networks, 4 heat supply network outlet conduits, 5 electronic circulation pump of heat-supply networks, 6 valve A, 7 valve B, 8 valve C, 9 valve D。
(5) detailed description of the invention
Accompanying drawing is a kind of specific embodiment of the present invention。This embodiment includes the steam-operating circulation pump of heat-supply network 3 being connected in parallel small turbine 1 and condenser 2, described condenser 2 with the heat supply network outlet conduit 4 of steam-operating circulation pump of heat-supply network 3 is provided with the electronic circulation pump of heat-supply network 5 in parallel with steam-operating circulation pump of heat-supply network 3, the capacity of electronic circulation pump of heat-supply network 5 and steam-operating circulation pump of heat-supply network 3 is similar or identical；Described heat supply network outlet conduit 4 is provided with the control valve A6 of steam-operating circulation pump of heat-supply network 3, valve B7 and controls the valve C8 of electronic circulation pump of heat-supply network 5, valve D9；The air intake of described condenser 2 connects big turbine discharge pipe。
Calculating according to unit balance chart, 150MW unit is when 480t/h enters vapour at full capacity, and maximum heating load is 228MW, is just empirically worth thermic load 26W/m latter stage in heat supply2Calculate, can area of heat-supply service be 8,760,000 square metres。Steam-operating circulation pump of heat-supply network 3 enters vapour, and to be about 100t/h heat capacity be 70MW, amounting to area of heat-supply service is 2,700,000 square metres, in order to realize benefit maximum and ensure unit safety, at the beginning of heat supply, latter stage is when area of heat-supply service is more than 11,460,000 square metres, close valve C8, valve D9 Open valve A6 and valve B7, electronic circulation pump of heat-supply network 5 disables, and opens steam-operating circulation pump of heat-supply network 3 and runs, and heat supply network quantity of circulating water runs 7900t/h。Now 150MW High Back Pressure Steam Turbine Units exhaust steam heat is all absorbed by heat supply network backwater and once heats, hot net water is carried out post bake by steam-operating circulation pump of heat-supply network 3 steam discharge, operating principle according to electricity determining by heat, unit thermic load and electric load are all in full load condition, and economy is best。
When heat supply just area of heat-supply service in latter stage is more than 8,760,000 square metres, time below 11,460,000 square metres, in order to realize benefit maximum and ensure unit safety, now steam-operating circulation pump of heat-supply network 3 disables, start electronic circulation pump of heat-supply network 5 to run, close valve A6 and valve B7, Open valve C8 and valve D9, only heat heat supply network recirculated water with big turbine discharge, to ensure high back pressure heat supply steam turbine safety and economy。
When just latter stage, area of heat-supply service was below 8,760,000 square metres in heat supply, in order to realize benefit maximum and ensure unit safety, now steam-operating circulation pump of heat-supply network 3 disables, start electronic circulation pump of heat-supply network 5 to run, close valve A6 and valve B7, Open valve C8 and valve D9, only heats heat supply network recirculated water with big turbine discharge, to ensure high back pressure heat supply steam turbine safety and economy。
When area of heat-supply service is below 11,460,000 square metres, electrically driven feed pump runs, and steam-operating circulation pump of heat-supply network 3 is stopped transport。The thermic load that turns cold gradually along with weather increases, when extraneous heat supply network thermic load increases to 228MW, 150MW high back pressure steam turbine is in oepration at full load state, when the continuation increase of heat supply network thermic load can not meet heat supply needs, in order to reduce the gross coal consumption rate of other unit, increase economic benefit, while ensureing high back pressure steam turbine oepration at full load, open steam-operating circulation pump of heat-supply network 3 and valve A6, valve B7, and it is gradually lowered electronic circulation pump of heat-supply network 5 flow, until when heat supply network thermic load reaches 298MW, steam-operating circulation pump of heat-supply network 3 replaces electronic circulation pump of heat-supply network 5 to run completely, close valve C8 and valve D9。
When electronic circulation pump of heat-supply network 5 and steam-operating circulation pump of heat-supply network 3 individually run, each other again can be standby each other, break down stoppage in transit time, quickly joined to ensure the safety of heat supply network and High Back Pressure Steam Turbine Units。
This operation method not only ensure that the safety of the operation of High Back Pressure Steam Turbine Units and heat network system when latter stage at the beginning of heat supply, thermic load was relatively low, also achieves maximizing the benefits in heat supply phase factory。
Claims (3)
1. the method that a 150MW high back pressure thermal power plant unit circulation pump of heat-supply network runs, including the steam-operating circulation pump of heat-supply network (3) being connected in parallel small turbine (1) and condenser (2), it is characterized in that: described condenser (2) with the heat supply network outlet conduit (4) of steam-operating circulation pump of heat-supply network (3) is provided with the electronic circulation pump of heat-supply network (5) in parallel with steam-operating circulation pump of heat-supply network (3), the capacity of electronic circulation pump of heat-supply network (5) and steam-operating circulation pump of heat-supply network (3) is similar or identical；When latter stage at the beginning of heat supply, area of heat-supply service was more than 11,460,000 square metres, opening steam-operating circulation pump of heat-supply network (3), electronic circulation pump of heat-supply network (5) disables；When area of heat-supply service is below 11,460,000 square metres, steam-operating circulation pump of heat-supply network (3) disables, and starts electronic circulation pump of heat-supply network (5)；Area of heat-supply service below 11,460,000 square metres, extraneous heat supply network thermic load is when increasing to 228MW, opens steam-operating circulation pump of heat-supply network (3), until when heat supply network thermic load reaches 298MW, closing electronic circulation pump of heat-supply network (5)。
2. 150MW high back pressure thermal power plant unit circulation pump of heat-supply network according to claim 1 run method, it is characterised in that: described heat supply network outlet conduit (4) is provided with control steam-operating circulation pump of heat-supply network (3) valve A(6), valve B(7) and control electronic circulation pump of heat-supply network (5) valve C(8), valve D(9)。
3. the method that 150MW high back pressure thermal power plant unit circulation pump of heat-supply network according to claim 1 runs, it is characterised in that: the air intake of described condenser (2) connects big gas turbine exhaust gas pipe。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610062058.8A CN105698241B (en) | 2016-01-29 | 2016-01-29 | A kind of method of 150MW high back pressures thermal power plant unit circulation pump of heat-supply network operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610062058.8A CN105698241B (en) | 2016-01-29 | 2016-01-29 | A kind of method of 150MW high back pressures thermal power plant unit circulation pump of heat-supply network operation |
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| Publication Number | Publication Date |
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| CN105698241A true CN105698241A (en) | 2016-06-22 |
| CN105698241B CN105698241B (en) | 2018-10-19 |
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| CN201610062058.8A Active CN105698241B (en) | 2016-01-29 | 2016-01-29 | A kind of method of 150MW high back pressures thermal power plant unit circulation pump of heat-supply network operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469017A (en) * | 2018-04-04 | 2018-08-31 | 浙江巨化热电有限公司 | A kind of pair is dragged electric pump back pressure turbine comprehensive utilization device and its method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI129736B (en) * | 2019-03-11 | 2022-08-15 | Hoegforsgst Oy | District heating system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000074397A (en) * | 1998-08-31 | 2000-03-14 | Noritz Corp | Hot-water heating device |
| JP2000193203A (en) * | 1998-12-22 | 2000-07-14 | Toshiba Eng Co Ltd | Steam turbine |
| CN102095215A (en) * | 2011-03-16 | 2011-06-15 | 姚善新 | Prefabricated radiant heating system |
| CN103017231A (en) * | 2012-12-11 | 2013-04-03 | 华电电力科学研究院 | Heat supply network water circulating pump energy-saving driving system of thermal power plant |
| CN204404312U (en) * | 2014-12-31 | 2015-06-17 | 中国能源建设集团山西省电力勘测设计院有限公司 | The heat network system of efficiency utilization steam power plant heating steam |
-
2016
- 2016-01-29 CN CN201610062058.8A patent/CN105698241B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000074397A (en) * | 1998-08-31 | 2000-03-14 | Noritz Corp | Hot-water heating device |
| JP2000193203A (en) * | 1998-12-22 | 2000-07-14 | Toshiba Eng Co Ltd | Steam turbine |
| CN102095215A (en) * | 2011-03-16 | 2011-06-15 | 姚善新 | Prefabricated radiant heating system |
| CN103017231A (en) * | 2012-12-11 | 2013-04-03 | 华电电力科学研究院 | Heat supply network water circulating pump energy-saving driving system of thermal power plant |
| CN204404312U (en) * | 2014-12-31 | 2015-06-17 | 中国能源建设集团山西省电力勘测设计院有限公司 | The heat network system of efficiency utilization steam power plant heating steam |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469017A (en) * | 2018-04-04 | 2018-08-31 | 浙江巨化热电有限公司 | A kind of pair is dragged electric pump back pressure turbine comprehensive utilization device and its method |
| CN108469017B (en) * | 2018-04-04 | 2023-09-15 | 浙江巨化热电有限公司 | Comprehensive utilization device and method for back pressure steam turbine of double-drag electric pump |
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| Publication number | Publication date |
|---|---|
| CN105698241B (en) | 2018-10-19 |
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