CN107859538A - It is a kind of to be used for the solidifying co-generation unit and its operation method for taking out back of the body heat supply - Google Patents
It is a kind of to be used for the solidifying co-generation unit and its operation method for taking out back of the body heat supply Download PDFInfo
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- CN107859538A CN107859538A CN201711233779.1A CN201711233779A CN107859538A CN 107859538 A CN107859538 A CN 107859538A CN 201711233779 A CN201711233779 A CN 201711233779A CN 107859538 A CN107859538 A CN 107859538A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 7
- 238000000605 extraction Methods 0.000 claims description 23
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 12
- 238000003303 reheating Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000007726 management method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
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Classifications
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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
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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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
-
- 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
- F01K21/00—Steam engine plants not otherwise provided for
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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]
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
It is used for the solidifying co-generation unit and its operation method for taking out back of the body heat supply the present invention relates to a kind of.There is the very big available loss of energy in traditional central heating mode.In the present invention：Boiler, steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder, generator, condenser pass sequentially through pipeline connection, boiler feed pipe is connected between condenser and boiler, condenser, condensate pump, low plus heater, feed-water heater, oxygen-eliminating device, feed pump, high plus heater are sequentially arranged with boiler feed pipe；Communicating pipe connection in the steam inlet and steam turbine of heat supply network heat exchanger, between low pressure (LP) cylinder, hydrophobic outlet are connected with low plus heater.The present invention is by improving the structure of Steam Turbine Through IP Admission, or increases time intermediate pressure cylinder behind, come adapt to Steam Turbine in pure condensate, draw gas, the switchover operation between three kinds of operating modes of back pressure.The energy of script loss is converted into the electric energy of high-quality by the present invention by steam turbine acting, realizes the cascade utilization of energy.
Description
Technical field
The present invention relates to cogeneration of heat and power field, and in particular to a kind of to be used for the solidifying co-generation unit and its fortune for taking out back of the body heat supply
Row method.
Background technology
Hair changes the energy [2016] 617 " on printing and distributing《Cogeneration of heat and power management method》Notice " require：Strive realizing north
The big-and-middle-sized above city cogeneration of heat and power central heating rate in side reaches more than 60%, and county town cogenerations of heat and power more than 200,000 populations is covered entirely
Lid.This indicates that the development of cogeneration of heat and power will enter a fast-developing period.And as China's policy is gradually paid attention to
The popularization of new energy, the ratio that fired power generating unit participates in peak regulation are gradually increasing so that unit is chronically at underrun.At present,
Traditional central heating mode is drawn gas for unit heating and heated in heat exchangers for district heating, user heating is then supplied, at this
Period, there is the very big available loss of energy.The design heating steam pressure of existing thermal power plant unit is generally 0.2-0.5MPa, and
Pure condensate changes the unit of heat supply, and its heating extraction pressure is then higher, can reach more than 0.8MPa.In actual motion, particularly exist
Just latter stage, temperature needed for hot net water typically only have 70-90 DEG C or so for heating, and now, there is very between design heating steam
The big available loss of energy.Moreover, reclaimed at present without effective measures.
In the prior art, the Chinese patent of Application No. 201710193938.3 disclose " steam turbine extraction condensing back pressure system and
Its adjusting method ", its without transforming turbine body, can be achieved with Steam Turbine in pure condensate, draw gas, three kinds of works of back pressure
It switchover operation between condition, can farthest increase external heating load, can realize that unit underload generates electricity with high benefit again.
And change thermal power plant unit for existing thermal power plant unit or pure condensate, and because heating extraction pressure is too high, when external heat supply increase, machine
The acting capacity loss of group also gradually increases.For this problem, effective technology measure need to be taken, to adapt to Steam Turbine pure
Coagulate, draw gas, the switchover operation between three kinds of operating modes of back pressure.
The content of the invention
It is an object of the invention to overcome above shortcomings in the prior art, and offer is a kind of reasonable in design,
Dependable performance, for the solidifying co-generation unit and its operation method for taking out back of the body heat supply.
Technical scheme is used by the present invention solves the above problems：It is a kind of to be used for the solidifying cogeneration of heat and power system for taking out back of the body heat supply
System, it includes：Boiler, steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder, generator, condenser, condensate pump,
Low plus heater, feed-water heater, oxygen-eliminating device, feed pump, high plus heater and heat supply network heat exchanger；Characterized in that, the vapour
The air intake of turbine high pressure cylinder and the main steam mouth of boiler connect, and the steam drain of the steam turbine high-pressure cylinder and the reheating of boiler are entered
Steam ports connects, and the reheating venthole of the boiler and the air intake of Steam Turbine Through IP Admission connect, the row of the Steam Turbine Through IP Admission
Steam ports is connected by the air intake of communicating pipe and turbine low pressure cylinder, and steam control valve is provided with communicating pipe, the company
Siphunculus is connected with the air intake of heating extraction steam pipe, and the venthole of heating extraction steam pipe is connected with the steam inlet of heat supply network heat exchanger, and
Quick closing valve regulating valve is installed on heating extraction steam pipe；The steam turbine high-pressure cylinder, Steam Turbine Through IP Admission and turbine low pressure cylinder are same
Axis connection, and common drive generator acting generates electricity；The steam drain of the turbine low pressure cylinder is connected with condenser, the boiler
The water inlet of feed pipe is connected with condenser, and the delivery port of the boiler feed pipe and the feed-water inlet of boiler connect；The boiler
On feed pipe condensate pump, low plus heater, feed-water heater, oxygen-eliminating device, feedwater are sequentially installed with along current flow direction
Pump and Gao Jia heaters；The hydrophobic outlet of the heat supply network heat exchanger is connected by drain pipe with low plus heater, and in drain pipe
On drain regulating valve is installed.It is reasonable in design, it is simple in construction.
Preferably, the design vapour pressure depreciation increase of the stage of Steam Turbine Through IP Admission of the present invention, so as to
Steam enthalpy drop value increase so that the acting ability increase of Steam Turbine Through IP Admission, and the steam discharge parameter of Steam Turbine Through IP Admission reduce.Its
In, the stage of the vapour pressure depreciation increase can be one-level or multistage.
Preferably, Steam Turbine Through IP Admission of the present invention adds several steamers on the basis of original flow passage component
Machine level, increased several stage composition flow passage components so that the acting ability increase of Steam Turbine Through IP Admission, and in steam turbine
The steam discharge parameter of cylinder pressure reduces.
Preferably, the exhaust steam pressure scope of Steam Turbine Through IP Admission of the present invention is 70kPa ~ 200kPa.
Preferably, the thermal source of feed-water heater of the present invention comes from drawing gas for Steam Turbine Through IP Admission.
Preferably, time intermediate pressure cylinder, institute are provided between Steam Turbine Through IP Admission of the present invention and turbine low pressure cylinder
The air intake that the steam drain of Steam Turbine Through IP Admission is stated with time intermediate pressure cylinder be connected, the steam drain of the secondary intermediate pressure cylinder by communicating pipe and
The air intake connection of turbine low pressure cylinder；The secondary intermediate pressure cylinder and steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder
It is all coaxially connected, and common drive generator acting generates electricity.
Preferably, the exhaust steam pressure scope of secondary intermediate pressure cylinder of the present invention is 70kPa ~ 200kPa.
Preferably, the thermal source of feed-water heater of the present invention comes from drawing gas for time intermediate pressure cylinder.
A kind of operation method as described above for being used for the solidifying co-generation unit for taking out back of the body heat supply, it is characterised in that described
Operation method is as follows：
In supplying thermal condition, the aperture of steam control valve and/or quick closing valve regulating valve is adjusted, the steam discharge of part Steam Turbine Through IP Admission enters
Enter turbine low pressure cylinder and continue acting generating, the steam discharge of part Steam Turbine Through IP Admission is delivered to heat supply network by heating extraction steam pipe and exchanged heat
Device heats hot net water and external heat supply；Opening drain regulating valve, the steam drainage that steam is formed after being exchanged heat in heat supply network heat exchanger,
Low plus heater is delivered to by drain pipe；
When the design vapour pressure depreciation increase of the stage of Steam Turbine Through IP Admission or Steam Turbine Through IP Admission add several steamers
During machine level, the steam discharge parameter of Steam Turbine Through IP Admission is 70kPa ~ 200kPa, and Steam Turbine Through IP Admission is drawn gas, for for feedwater
Heater provides thermal source；
When the steam drain connection time intermediate pressure cylinder of Steam Turbine Through IP Admission, the steam discharge parameter of secondary intermediate pressure cylinder is 70kPa ~ 200kPa, right
Secondary intermediate pressure cylinder is drawn gas, for providing thermal source for feed-water heater.
Preferably, the steam discharge parameter by reducing Steam Turbine Through IP Admission or secondary intermediate pressure cylinder, to adapt to Steam Turbine pure
Coagulate, draw gas, the switchover operation between three kinds of operating modes of back pressure.Back pressure operating mode now refers to that turbine low pressure cylinder does not enter vapour, steam turbine
The all external heat supplies of the steam discharge of intermediate pressure cylinder or secondary intermediate pressure cylinder, one steam for only extracting very little are low to steam turbine as cooling steam
Cylinder pressure is cooled down.
The present invention compared with prior art, has advantages below and effect：（1）The present invention propose it is a kind of reasonable in design,
It is simple in construction, dependable performance, it can effectively reduce the co-generation unit of Steam Turbine Through IP Admission steam discharge parameter.（2）The present invention passes through
Increase the pressure drop of the stage of Steam Turbine Through IP Admission, or increase several stages newly in steam turbine, or pressed in steam turbine
Increase the relatively low secondary intermediate pressure cylinder of pressure parameter between cylinder and low pressure (LP) cylinder newly so that the acting ability increase of Steam Turbine Through IP Admission, so as to
Reduce the steam discharge parameter of Steam Turbine Through IP Admission, come adapt to Steam Turbine in pure condensate, draw gas, switching between three kinds of operating modes of back pressure fortune
OK.（3）The present invention not only can effectively reduce heating and draw gas the heat transfer temperature difference of heat-exchange system, reduce acting capacity loss；Simultaneously
By the energy of script loss, done work by steam turbine and be converted into the electric energy of high-quality, effectively reclaim the high-quality energy of this part,
Realize the cascade utilization of energy.
Brief description of the drawings
Fig. 1 is the structural representation for being used for the solidifying co-generation unit for taking out back of the body heat supply in the embodiment of the present invention.
Fig. 2 is the structure for realizing the solidifying co-generation unit for taking out back of the body heat supply in the embodiment of the present invention by increasing stage
Schematic diagram.
Fig. 3 is the structure for realizing the solidifying co-generation unit for taking out back of the body heat supply in the embodiment of the present invention by increasing time intermediate pressure cylinder
Schematic diagram.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described in further detail by embodiment, and following examples are to this hair
Bright explanation and the invention is not limited in following examples.
Embodiment 1.
Referring to Fig. 1 to Fig. 3, in the present embodiment, a kind of to be used for the solidifying co-generation unit for taking out back of the body heat supply, it includes：Pot
Stove 1, steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4, generator 5, condenser 6, condensate pump 7, it is low plus
Heater 8, feed-water heater 9, oxygen-eliminating device 10, feed pump 11, high plus heater 12 and heat supply network heat exchanger 13；Steam turbine high-pressure cylinder
2 air intake is connected with the main steam mouth of boiler 1, and the steam drain of steam turbine high-pressure cylinder 2 is connected with the reheating air intake of boiler 1,
The reheating venthole of boiler 1 is connected with the air intake of Steam Turbine Through IP Admission 3, and the steam drain of Steam Turbine Through IP Admission 3 passes through communicating pipe
20 are connected with the air intake of turbine low pressure cylinder 4, and steam control valve 14 is provided with communicating pipe 20, communicating pipe 20 and heating
The air intake connection of extraction steam pipe 21, the venthole of heating extraction steam pipe 21 is connected with the steam inlet of heat supply network heat exchanger 13, and is being adopted
Quick closing valve regulating valve 15 is installed on warm extraction steam pipe 21；The steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3 and turbine low pressure cylinder 4
It is coaxially connected, and common drive generator 5 acting generates electricity；The steam drain of turbine low pressure cylinder 4 is connected with condenser 6, and boiler is given
The water inlet of water pipe 23 is connected with condenser 6, and the delivery port of boiler feed pipe 23 is connected with the feed-water inlet of boiler 1；Boiler is given
On water pipe 23 along current flow direction be sequentially installed with condensate pump 7, low plus heater 8, feed-water heater 9, oxygen-eliminating device 10,
Feed pump 11 and Gao Jia heaters 12；The hydrophobic outlet of heat supply network heat exchanger 13 is connected by drain pipe 22 with low plus heater 8, and
Drain regulating valve 16 is installed on drain pipe 22.
In the present embodiment, the design vapour pressure depreciation increase of the stage of Steam Turbine Through IP Admission 3, so as to steam enthalpy drop
Value increase so that the acting ability increase of Steam Turbine Through IP Admission 3, and the steam discharge parameter of Steam Turbine Through IP Admission 3 reduce.Wherein, this
In vapour pressure depreciation increase stage can be one-level or multistage.
In the present embodiment, Steam Turbine Through IP Admission 3 adds several stages, forms flow passage component 31 so that steamer
The acting ability increase of machine intermediate pressure cylinder 3, and the steam discharge parameter of Steam Turbine Through IP Admission 3 reduce.
In the present embodiment, the exhaust steam pressure scope of Steam Turbine Through IP Admission 3 is 70kPa ~ 200kPa.
In the present embodiment, the thermal source of feed-water heater 9 comes from drawing gas for Steam Turbine Through IP Admission 3.
In the present embodiment, time intermediate pressure cylinder 17, steam turbine are provided between Steam Turbine Through IP Admission 3 and turbine low pressure cylinder 4
The steam drain of intermediate pressure cylinder 3 is connected with the air intake of time intermediate pressure cylinder 17, and the steam drain of secondary intermediate pressure cylinder 17 passes through communicating pipe 20 and steamer
The air intake connection of machine low pressure (LP) cylinder 4；Secondary intermediate pressure cylinder 17 and steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4 are all
It is coaxially connected, and common drive generator 5 acting generates electricity；The exhaust steam pressure scope of secondary intermediate pressure cylinder 17 is 70kPa ~ 200kPa；Give
The thermal source of water heater 9 comes from drawing gas for time intermediate pressure cylinder 17.
In the present embodiment, operation method is as follows：
In supplying thermal condition, the aperture of steam control valve 14 and/or quick closing valve regulating valve 15 is adjusted, part Steam Turbine Through IP Admission 3
Steam discharge continues acting into turbine low pressure cylinder 4 and generated electricity, and the steam discharge of part Steam Turbine Through IP Admission 3 is conveyed by heating extraction steam pipe 21
Hot net water and external heat supply are heated to heat supply network heat exchanger 13；Drain regulating valve 16 is opened, steam exchanges heat in heat supply network heat exchanger 13
The steam drainage formed afterwards, low plus heater 8 is delivered to by drain pipe 22；
When the design vapour pressure depreciation increase of the stage of Steam Turbine Through IP Admission 3 or Steam Turbine Through IP Admission 3 add several vapour
During turbine level, the steam discharge parameter of Steam Turbine Through IP Admission 3 is 70kPa ~ 200kPa, and Steam Turbine Through IP Admission 3 is drawn gas, for for
Feed-water heater 9 provides thermal source；
When the steam drain connection time intermediate pressure cylinder 17 of Steam Turbine Through IP Admission 3, the steam discharge parameter of secondary intermediate pressure cylinder 17 for 70kPa ~
200kPa, secondary intermediate pressure cylinder 17 is drawn gas, for providing thermal source for feed-water heater 9.
In the present embodiment, by reducing the steam discharge parameter of Steam Turbine Through IP Admission 3 or secondary intermediate pressure cylinder 17, to adapt to steam turbine
Group in pure condensate, draw gas, the switchover operation between three kinds of operating modes of back pressure.Back pressure operating mode now refers to that turbine low pressure cylinder 4 does not enter vapour,
The all external heat supplies of the steam discharge of Steam Turbine Through IP Admission 4 or secondary intermediate pressure cylinder 17, one steam of very little is only extracted as cooling steam
Turbine low pressure cylinder 4 is cooled down.
Embodiment 2.
Referring to Fig. 1, co-generation unit includes：Boiler 1, steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, steam turbine low-pressure
Cylinder 4, generator 5, condenser 6, condensate pump 7, low plus heater 8, feed-water heater 9, oxygen-eliminating device 10, feed pump 11, Gao Jia
Heater 12 and heat supply network heat exchanger 13；The air intake of steam turbine high-pressure cylinder 2 is connected with the main steam mouth of boiler 1, turbine high-pressure
The steam drain of cylinder 2 is connected with the reheating air intake of boiler 1, and the reheating venthole of boiler 1 connects with the air intake of Steam Turbine Through IP Admission 3
Connecing, the steam drain of Steam Turbine Through IP Admission 3 is connected by communicating pipe 20 with the air intake of turbine low pressure cylinder 4, and in communicating pipe 20
On steam control valve 14 is installed, be connected with the air intake of heating extraction steam pipe 21 communicating pipe 20, the venthole of heating extraction steam pipe 21
It is connected with the steam inlet of heat supply network heat exchanger 13, and quick closing valve regulating valve 15 is installed on heating extraction steam pipe 21；The steam turbine
High pressure cylinder 2, Steam Turbine Through IP Admission 3 and turbine low pressure cylinder 4 are coaxially connected, and common drive generator 5 acting generates electricity；Steam turbine
The steam drain of low pressure (LP) cylinder 4 is connected with condenser 6, and the water inlet of boiler feed pipe 23 is connected with condenser 6, boiler feed pipe 23
Delivery port is connected with the feed-water inlet of boiler 1；On boiler feed pipe 23 condensate pump is sequentially installed with along current flow direction
7th, low plus heater 8, feed-water heater 9, oxygen-eliminating device 10, feed pump 11 and Gao Jia heaters 12；Heat supply network heat exchanger 13 it is hydrophobic
Outlet is connected by drain pipe 22 with low plus heater 8, and drain regulating valve 16 is provided with drain pipe 22.
In the case, the design vapour pressure depreciation increase of the stage of Steam Turbine Through IP Admission 3, so as to steam enthalpy drop value
Increase so that the acting ability increase of Steam Turbine Through IP Admission 3, and the steam discharge parameter of Steam Turbine Through IP Admission 3 reduce；Here vapour pressure
The stage of depreciation increase can be one-level or multistage；Now, the exhaust steam pressure scope of Steam Turbine Through IP Admission 3 is
70kPa ~ 200kPa, and Steam Turbine Through IP Admission 3 is drawn gas, for providing thermal source for feed-water heater 9.
In the case, operating mode is drawn gas or when back pressure operating mode is run when Steam Turbine is switched to by pure condensate operating mode, now vapour
The steam discharge parameter of turbine intermediate pressure cylinder 3 is reduced, so that the Steam Turbine, when drawing gas operating mode operation, efficiency level obtains
Very big lifting.
Embodiment 3.
Referring to Fig. 2, co-generation unit includes：Boiler 1, steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, steam turbine low-pressure
Cylinder 4, generator 5, condenser 6, condensate pump 7, low plus heater 8, feed-water heater 9, oxygen-eliminating device 10, feed pump 11, Gao Jia
Heater 12 and heat supply network heat exchanger 13；The air intake of steam turbine high-pressure cylinder 2 is connected with the main steam mouth of boiler 1, turbine high-pressure
The steam drain of cylinder 2 is connected with the reheating air intake of boiler 1, and the reheating venthole of boiler 1 connects with the air intake of Steam Turbine Through IP Admission 3
Connecing, the steam drain of Steam Turbine Through IP Admission 3 is connected by communicating pipe 20 with the air intake of turbine low pressure cylinder 4, and in communicating pipe 20
On steam control valve 14 is installed, be connected with the air intake of heating extraction steam pipe 21 communicating pipe 20, the venthole of heating extraction steam pipe 21
It is connected with the steam inlet of heat supply network heat exchanger 13, and quick closing valve regulating valve 15 is installed on heating extraction steam pipe 21；The steam turbine
High pressure cylinder 2, Steam Turbine Through IP Admission 3 and turbine low pressure cylinder 4 are coaxially connected, and common drive generator 5 acting generates electricity；Steam turbine
The steam drain of low pressure (LP) cylinder 4 is connected with condenser 6, and the water inlet of boiler feed pipe 23 is connected with condenser 6, boiler feed pipe 23
Delivery port is connected with the feed-water inlet of boiler 1；On boiler feed pipe 23 condensate pump is sequentially installed with along current flow direction
7th, low plus heater 8, feed-water heater 9, oxygen-eliminating device 10, feed pump 11 and Gao Jia heaters 12；Heat supply network heat exchanger 13 it is hydrophobic
Outlet is connected by drain pipe 22 with low plus heater 8, and drain regulating valve 16 is provided with drain pipe 22.
In the case, Steam Turbine Through IP Admission 3 adds several stages, forms flow passage component 31 so that steam turbine
The acting ability increase of intermediate pressure cylinder 3, and the steam discharge parameter of Steam Turbine Through IP Admission 3 reduce；Now, Steam Turbine Through IP Admission 3 is original
Through-flow structure is constant, and several stages are added behind original through-flow structure, forms flow passage component 31, increased circulation
The steam pressure design parameter of part 31 is less than original through-flow structure；Now, the exhaust steam pressure scope of Steam Turbine Through IP Admission 3 is
70kPa ~ 200kPa, and Steam Turbine Through IP Admission 3 is drawn gas, for providing thermal source for feed-water heater 9.
In the case, operating mode is drawn gas or when back pressure operating mode is run when Steam Turbine is switched to by pure condensate operating mode, now vapour
The steam discharge parameter of turbine intermediate pressure cylinder 3 is reduced, so that the Steam Turbine, when drawing gas operating mode operation, efficiency level obtains
Very big lifting.
Embodiment 4.
Referring to Fig. 3, co-generation unit includes：Boiler 1, steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, steam turbine low-pressure
Cylinder 4, generator 5, condenser 6, condensate pump 7, low plus heater 8, feed-water heater 9, oxygen-eliminating device 10, feed pump 11, Gao Jia
Heater 12 and heat supply network heat exchanger 13；The air intake of steam turbine high-pressure cylinder 2 is connected with the main steam mouth of boiler 1, turbine high-pressure
The steam drain of cylinder 2 is connected with the reheating air intake of boiler 1, and the reheating venthole of boiler 1 connects with the air intake of Steam Turbine Through IP Admission 3
Connecing, the steam drain of Steam Turbine Through IP Admission 3 is connected by communicating pipe 20 with the air intake of turbine low pressure cylinder 4, and in communicating pipe 20
On steam control valve 14 is installed, be connected with the air intake of heating extraction steam pipe 21 communicating pipe 20, the venthole of heating extraction steam pipe 21
It is connected with the steam inlet of heat supply network heat exchanger 13, and quick closing valve regulating valve 15 is installed on heating extraction steam pipe 21；The steam turbine
High pressure cylinder 2, Steam Turbine Through IP Admission 3 and turbine low pressure cylinder 4 are coaxially connected, and common drive generator 5 acting generates electricity；Steam turbine
The steam drain of low pressure (LP) cylinder 4 is connected with condenser 6, and the water inlet of boiler feed pipe 23 is connected with condenser 6, boiler feed pipe 23
Delivery port is connected with the feed-water inlet of boiler 1；On boiler feed pipe 23 condensate pump is sequentially installed with along current flow direction
7th, low plus heater 8, feed-water heater 9, oxygen-eliminating device 10, feed pump 11 and Gao Jia heaters 12；Heat supply network heat exchanger 13 it is hydrophobic
Outlet is connected by drain pipe 22 with low plus heater 8, and drain regulating valve 16 is provided with drain pipe 22.
In the case, the steam design parameter of secondary intermediate pressure cylinder 17 is less than the steam design parameter of Steam Turbine Through IP Admission 3, and
The exhaust steam pressure scope of secondary intermediate pressure cylinder 17 is 70kPa ~ 200kPa；In addition, secondary intermediate pressure cylinder 17 is drawn gas, for adding for feedwater
Hot device 9 provides thermal source.
It is now secondary when Steam Turbine is switched to by pure condensate operating mode draws gas operating mode or the operation of back pressure operating mode in the case
The steam discharge parameter of intermediate pressure cylinder 17 is reduced, so that the Steam Turbine, when drawing gas operating mode operation, efficiency level obtains
Very big lifting.
Although the present invention is disclosed as above with embodiment, it is not limited to protection scope of the present invention, any to be familiar with
The technical staff of this technology, in the change and retouching made without departing from the spirit and scope of the invention, this hair all should be belonged to
Bright protection domain.
Claims (10)
1. a kind of be used for the solidifying co-generation unit for taking out back of the body heat supply, including boiler（1）, steam turbine high-pressure cylinder（2）, press in steam turbine
Cylinder（3）, turbine low pressure cylinder（4）, generator（5）, condenser（6）, condensate pump（7）, low plus heater（8）, feedwater heating
Device（9）, oxygen-eliminating device（10）, feed pump（11）, high plus heater（12）With heat supply network heat exchanger（13）, it is characterised in that the vapour
Turbine high pressure cylinder（2）Air intake and boiler（1）Main steam mouth connection, the steam turbine high-pressure cylinder（2）Steam drain and pot
Stove（1）Reheating air intake connection, the boiler（1）Reheating venthole and Steam Turbine Through IP Admission（3）Air intake connection, institute
State Steam Turbine Through IP Admission（3）Steam drain pass through communicating pipe（20）With turbine low pressure cylinder（4）Air intake connection, the connection
Pipe（20）On steam control valve is installed（14）, the communicating pipe（20）With heating extraction steam pipe（21）Air intake connection, it is described
Heating extraction steam pipe（21）Venthole and heat supply network heat exchanger（13）Steam inlet connection, the heating extraction steam pipe（21）Upper installation
There is quick closing valve regulating valve（15）；The steam turbine high-pressure cylinder（2）, Steam Turbine Through IP Admission（3）With turbine low pressure cylinder（4）Coaxially connect
Connect, steam turbine high-pressure cylinder（2）, Steam Turbine Through IP Admission（3）And turbine low pressure cylinder（4）It is common to drive generator（5）Acting generates electricity；
The turbine low pressure cylinder（4）Steam drain and condenser（6）Connection, the boiler feed pipe（23）Water inlet and condenser
（6）Connection, the boiler feed pipe（23）Delivery port and boiler（1）Feed-water inlet connection；The boiler feed pipe（23）On
Condensate pump is sequentially installed with along current flow direction（7）, low plus heater（8）, feed-water heater（9）, oxygen-eliminating device（10）、
Feed pump（11）With height plus heater（12）；The heat supply network heat exchanger（13）Hydrophobic outlet pass through drain pipe（22）Add with low
Hot device（8）Connection, the drain pipe（22）On drain regulating valve is installed（16）.
2. according to claim 1 be used for the solidifying co-generation unit for taking out back of the body heat supply, it is characterised in that in the steam turbine
Cylinder pressure（3）Stage design vapour pressure depreciation increase, so as to steam enthalpy drop value increase so that Steam Turbine Through IP Admission（3）
The increase of acting ability, and Steam Turbine Through IP Admission（3）Steam discharge parameter reduce.
3. according to claim 1 be used for the solidifying co-generation unit for taking out back of the body heat supply, it is characterised in that in the steam turbine
Cylinder pressure（3）Several stages are added, form flow passage component（31）So that Steam Turbine Through IP Admission（3）Acting ability increase,
And Steam Turbine Through IP Admission（3）Steam discharge parameter reduce.
4. it is used for the solidifying co-generation unit for taking out back of the body heat supply according to claim any one of 1-3, it is characterised in that described
Steam Turbine Through IP Admission（3）Exhaust steam pressure scope be 70kPa ~ 200kPa.
5. according to claim 1 be used for the solidifying co-generation unit for taking out back of the body heat supply, it is characterised in that the feedwater heating
Device（9）Thermal source come from Steam Turbine Through IP Admission（3）Draw gas.
6. according to claim 1 be used for the solidifying co-generation unit for taking out back of the body heat supply, it is characterised in that in the steam turbine
Cylinder pressure（3）With turbine low pressure cylinder（4）Between be provided with time intermediate pressure cylinder（17）, the Steam Turbine Through IP Admission（3）Steam drain with
Secondary intermediate pressure cylinder（17）Air intake connection, the secondary intermediate pressure cylinder（17）Steam drain pass through communicating pipe（20）With turbine low pressure cylinder
（4）Air intake connection；The secondary intermediate pressure cylinder（17）With steam turbine high-pressure cylinder（2）, Steam Turbine Through IP Admission（3）, steam turbine low-pressure
Cylinder（4）It is coaxially connected, steam turbine high-pressure cylinder（2）, Steam Turbine Through IP Admission（3）, secondary intermediate pressure cylinder（17）, turbine low pressure cylinder（4）Altogether
With drive generator（5）Acting generates electricity.
7. according to claim 6 be used for the solidifying co-generation unit for taking out back of the body heat supply, it is characterised in that the secondary intermediate pressure cylinder
（17）Exhaust steam pressure scope be 70kPa ~ 200kPa.
8. according to claim 6 be used for the solidifying co-generation unit for taking out back of the body heat supply, it is characterised in that the feedwater heating
Device（9）Thermal source come from time intermediate pressure cylinder（17）Draw gas.
9. a kind of operation method for being used for the solidifying co-generation unit for taking out back of the body heat supply as described in claim any one of 1-8, its
It is characterised by, the operation method is as follows：
In supplying thermal condition, steam control valve is adjusted（14）And/or quick closing valve regulating valve（15）Aperture, part Steam Turbine Through IP Admission
（3）Steam discharge enter turbine low pressure cylinder（4）Continue acting to generate electricity, part Steam Turbine Through IP Admission（3）Steam discharge taken out by heating
Steam pipe（21）It is delivered to heat supply network heat exchanger（13）Heat hot net water and external heat supply；Open drain regulating valve（16）, steam is in warm
Net heat exchanger（13）The steam drainage formed after middle heat exchange, passes through drain pipe（22）It is delivered to low plus heater（8）；
Work as Steam Turbine Through IP Admission（3）Stage design vapour pressure depreciation increase or Steam Turbine Through IP Admission（3）Add number
During individual stage, Steam Turbine Through IP Admission（3）Steam discharge parameter be 70kPa ~ 200kPa, to Steam Turbine Through IP Admission（3）Taken out
Vapour, for for feed-water heater（9）Thermal source is provided；
Work as Steam Turbine Through IP Admission（3）Steam drain connection time intermediate pressure cylinder（17）When, secondary intermediate pressure cylinder（17）Steam discharge parameter be 70kPa
~ 200kPa, to secondary intermediate pressure cylinder（17）Drawn gas, for for feed-water heater（9）Thermal source is provided.
10. the operation method according to claim 9 for being used for the solidifying co-generation unit for taking out back of the body heat supply, it is characterised in that
By reducing Steam Turbine Through IP Admission（3）Or secondary intermediate pressure cylinder（17）Steam discharge parameter, come adapt to Steam Turbine in pure condensate, draw gas, carry on the back
Press the switchover operation between three kinds of operating modes.
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| CN108757066A (en) * | 2018-06-13 | 2018-11-06 | 华电电力科学研究院有限公司 | Fired power generating unit backheat hold over system and operation method for load responding |
| CN110608073A (en) * | 2019-09-30 | 2019-12-24 | 国网山东省电力公司电力科学研究院 | An analysis method for the influence of back pressure on turbogenerator set and its output space |
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| CN110608073A (en) * | 2019-09-30 | 2019-12-24 | 国网山东省电力公司电力科学研究院 | An analysis method for the influence of back pressure on turbogenerator set and its output space |
| CN110608073B (en) * | 2019-09-30 | 2022-04-12 | 国网山东省电力公司电力科学研究院 | A method for analyzing the influence of back pressure on the steam turbine generator set and its output space |
| CN111197505A (en) * | 2020-02-27 | 2020-05-26 | 西安西热节能技术有限公司 | Wide back pressure steam turbine cascade utilization system suitable for sea water desalination and heat supply |
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| CN113062779A (en) * | 2021-04-29 | 2021-07-02 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Performance monitoring system and method for water supply pump steam turbine |
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