CN108692351A - High back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization system and method - Google Patents
High back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization system and method Download PDFInfo
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- CN108692351A CN108692351A CN201810654578.7A CN201810654578A CN108692351A CN 108692351 A CN108692351 A CN 108692351A CN 201810654578 A CN201810654578 A CN 201810654578A CN 108692351 A CN108692351 A CN 108692351A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 254
- 238000010438 heat treatment Methods 0.000 title claims abstract description 75
- 238000005457 optimization Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005086 pumping Methods 0.000 title claims description 27
- 230000015271 coagulation Effects 0.000 claims description 39
- 238000005345 coagulation Methods 0.000 claims description 39
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 abstract description 31
- 230000013011 mating Effects 0.000 abstract description 3
- 239000003643 water by type Substances 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 7
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 6
- 230000007812 deficiency Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007717 exclusion Effects 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002918 waste heat Substances 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
-
- 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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- 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 present invention relates to high back pressure circulating water heating and solidifying thermal power plant unit combined optimization system and method are taken out, the system comprises High Back Pressure Steam Turbine Units low pressure (LP) cylinders(23), high back pressure condenser(17), high back pressure condenser inlet pipeline, heat supply network water return pipeline and several plate heat exchangers, High Back Pressure Steam Turbine Units low pressure (LP) cylinder(23)With high back pressure condenser(17)It is connected, high back pressure condenser(17)It is connected with the high back pressure condenser inlet pipeline, the high back pressure condenser inlet pipeline is connected with the heat supply network water return pipeline, and several plate heat exchanger parallel arrangements are in the high back pressure condenser inlet pipeline.The present invention adds several platen type heat exchangers and mating electrically operated gate etc. in systems, heat supply network return water is set first to enter plate heat exchanger, High Back Pressure Steam Turbine Units condenser is entered back into after other extraction and condensing unit condensed waters to be heated, so that high back pressure thermal power plant unit back pressure is reduced, the raising of on-load ability, so that extraction and condensing unit condensing water temperature is improved, heat consumption rate and coa consumption rate reduce.
Description
Technical field
The present invention relates to high back pressure circulating water heating and take out solidifying heating system and method more particularly to a kind of high back pressure cycle
Water heat supply and pumping coagulate thermal power plant unit combined optimization system and method.
Background technology
Energy-saving and emission-reduction are the fundamental state policies that China's economy realizes sustainable development, and for power industry, cogeneration of heat and power is real
One important measures of existing national energy conservation and emission reduction.Heating mainly has three ways, such as to take out solidifying, high back pressure, absorption heat pump, mesh
Power plant of the preceding country is more using solidifying both combination steam supply ways with high back pressure are taken out.High back pressure thermal power plant unit utilizes steam turbine low-pressure
Cylinder steam discharge by heat supply network circulating water heating to 70 DEG C or more, subsequently into Gateway Station in Heating Network heater, through extraction and condensing unit intermediate pressure cylinder steam discharge
Hot net water is heated to 90 DEG C or more external heat supplies by steam extraction.High back pressure thermal power plant unit electricity determining by heat is not involved in peak load regulation network, takes out solidifying
Unit participates in, and high back pressure thermal power plant unit on-load ability is affected to economy of power plant.High back pressure thermal power plant unit does not have low-temperature receiver
Loss, for net coal consumption rate in 170g/kWh or so, profitability is strong, and contributrion margin is big.In heat supplying process, some power plant due to
Heat supply network outer net load is relatively low, causes heat supply network return water temperature higher (55 DEG C or more), causes unit back pressuce excessively high, limit on-load
Ability leads to the reduction of unit district heating economy benefit.It takes out and coagulates thermal power plant unit since steam extraction amount is big, condensing amount is reduced, unit condenser
Back pressure ultralimit back pressure (3.4kPa or less), condensing water temperature is low (20 DEG C and less), leads to that No. 8 low plus steam extraction amount increases, heat
Consumption rate increases.
The Chinese invention patent of Patent No. ZL201611224518.9 discloses a kind of directly empty using cooling water heat
Cold high back pressure-steam extraction combining heating system.To solve, high back pressure water at low temperature direct-furnish pattern heat supply distance is limited, utilizes steam extraction merely
Heating hot net water damages big problem, is supplied using cooling water heat Direct Air-Cooled high back pressure-steam extraction joint the invention provides a kind of
Hot systems.The system includes air cooling unit, the first exhaust steam valve, Air-Cooling Island, the second exhaust steam valve, heat supply condenser, electric heat pump, heat
Net heater, short distance heat user, heat exchange station, auxiliary machine circulating cooling water outlet pipe, induced cooling tower, hot water valve, subsidiary engine
Cooling water return pipe, extraction control valve, remote heat user, condensate valve, drain valve and generator, the invention is with height
Based on back pressure thermal power plant unit, subsidiary engine waste heat is fully recycled, the recycling of energy and cascade utilization in heat supplying process are realized, improved
The economy of unit has achieved the purpose that energy-saving.But there are still High Back Pressure Steam Turbine Units on-load ability is low and take out solidifying for the invention
The low technological deficiency of unit condensing water temperature, it would be highly desirable to improve.
The Chinese invention patent of Patent No. ZL201710459214.9 discloses a kind of high back pressure thermal power plant unit condensed water
Anti- overtemperature cooling system, including condenser and precision processing device of condensation water, set between condenser and precision processing device of condensation water
Condensation water heat exchanger is set, the one end for condensing water heat exchanger is passed through condensed water, and the other end is passed through heat supply network return water as cooling water.
The inventive structure is simple, small investment, realizes effective control of high back pressure thermal power plant unit condensing water temperature, while using hot net water
As cooling water, system thermal is made full use of, i.e., heated part heat supply network return water using condensed water, reduce heat loss, into
One step is energy-saving.But there are still the low technologies low with extraction and condensing unit condensing water temperature of High Back Pressure Steam Turbine Units on-load ability for the invention
Defect, it would be highly desirable to improve.
The Chinese utility model patent of Patent No. ZL201521078509.4 discloses a kind of high back pressure thermal power plant unit
Circulation belongs to heat supply process field.The system includes a plurality of branch, and wherein the first branch includes heat supply network return water coldplate
Formula heat exchanger and cooling tower are cooled down off-site heat supply network return water by the two components, then pass through condenser and cycle
Heat supply is carried out to off-site heat supply network after water pump;The second branch includes that heat supply network return water cools down board-like recuperator bypass valve, the second branch
By cooling tower, but heat supply is carried out to off-site heat supply network merely through after condenser and water circulating pump;Third branch includes heat supply network
Heater, third branch is to supplying off-site heat supply network after the return water of condenser is further heated by heat exchangers for district heating
Heat.The program solve prior art heat supply do not adapt to concrete condition and it is less economical the problems such as, have improve heating efficiency
Many advantages, such as reducing fuel consumption and ensureing economical effect of heat-supply.But there are still High Back Pressure Steam Turbine Units on-load abilities for the utility model
The low technological deficiency low with extraction and condensing unit condensing water temperature, it would be highly desirable to improve.
Invention content
In order to solve in above-mentioned heat supply combination, there are High Back Pressure Steam Turbine Units on-load ability is low and extraction and condensing unit condensing water temperature
Low technological deficiency the present invention provides a kind of complete thermal power plant's high back pressure of system, takes out and coagulates thermal power plant unit combined optimization system
And the technical solution of method, it is specific as follows:
High back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization system, including High Back Pressure Steam Turbine Units low pressure (LP) cylinder, highback
Press condenser, high back pressure condenser inlet pipeline and heat supply network water return pipeline, the High Back Pressure Steam Turbine Units low pressure (LP) cylinder and the high back pressure
Condenser is connected, and the high back pressure condenser is connected with the high back pressure condenser inlet pipeline, the high back pressure condensing
Device inlet pipeline is connected with the heat supply network water return pipeline, including several plate heat exchangers, and several plate heat exchangers are in parallel
It is arranged in the high back pressure condenser inlet pipeline.
Preferably, the high back pressure condenser inlet pipeline is equipped with high back pressure condenser water inlet electrically operated gate.
In any of the above-described scheme preferably, the plate heat exchanger use three, respectively the first plate heat exchanger,
Second plate heat exchanger and third plate heat exchanger, first plate heat exchanger include the first heat supply network water inlet end and the first heat supply network
Backwater end, the first heat supply network water inlet end is equipped with the first plate heat exchanger heat supply network water inlet electrically operated gate, the first heat supply network backwater end
Equipped with the first plate heat exchanger heat supply network return water electrically operated gate.
In any of the above-described scheme preferably, second plate heat exchanger includes the second heat supply network water inlet end and the second heat
Net backwater end, the second heat supply network water inlet end is equipped with the second plate heat exchanger heat supply network water inlet electrically operated gate, the second heat supply network return water
End is equipped with the second plate heat exchanger heat supply network return water electrically operated gate.
In any of the above-described scheme preferably, the third plate heat exchanger includes third heat supply network water inlet end and third heat
Net backwater end, the third heat supply network water inlet end is equipped with third plate heat exchanger heat supply network water inlet electrically operated gate, the third heat supply network return water
End is equipped with third plate heat exchanger heat supply network return water electrically operated gate.
In any of the above-described scheme preferably, first plate heat exchanger includes the first condensed water water inlet end and first
Coagulation hydroenergy backwater end, the first condensed water water inlet end are equipped with the first plate heat exchanger condensed water intake gate, first condensation
Water backwater end is equipped with the first plate heat exchanger coagulation hydroenergy backwater door.
In any of the above-described scheme preferably, second plate heat exchanger includes the second condensed water water inlet end and second
Coagulation hydroenergy backwater end, the second condensed water water inlet end are equipped with the second plate heat exchanger condensed water intake gate, second condensation
Water backwater end is equipped with the second plate heat exchanger coagulation hydroenergy backwater door.
In any of the above-described scheme preferably, the third plate heat exchanger includes third condensed water water inlet end and third
Coagulation hydroenergy backwater end, the third condensed water water inlet end are equipped with third plate heat exchanger condensed water intake gate, the third condensation
Water backwater end is equipped with third plate heat exchanger coagulation hydroenergy backwater door.
It is preferably in any of the above-described scheme, including high back pressure condenser water return pipeline, the first heat exchangers for district heating, second
Heat exchangers for district heating, third heat exchangers for district heating, heat supply network water supply pipe, the high back pressure condenser water return pipeline are equipped with high back pressure condensing
Device return water electrically operated gate and circulation pump of heat-supply network, first heat exchangers for district heating, the second heat exchangers for district heating, third heat exchangers for district heating point
It is not arranged in parallel in the high back pressure condenser water return pipeline and heat supply network water supply pipe.
High back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization method, and implement this method is any of the above-described preferred
High back pressure circulating water heating and take out and coagulate thermal power plant unit combined optimization system, which is characterized in that include the following steps:
Step 1:Before the high back pressure circulating water heating and the solidifying thermal power plant unit combined optimization system of pumping put into operation, institute
It states high back pressure condenser water inlet electrically operated gate to open, the first plate heat exchanger heat supply network water inlet electrically operated gate, the second plate heat exchanger
Heat supply network water inlet electrically operated gate, third plate heat exchanger heat supply network water inlet electrically operated gate, the first plate heat exchanger heat supply network return water electrically operated gate, second
Plate heat exchanger heat supply network return water electrically operated gate, third plate heat exchanger heat supply network return water electrically operated gate, the first plate heat exchanger condensed water return
Water valve, the first plate heat exchanger condensed water intake gate, the second plate heat exchanger coagulation hydroenergy backwater door, the condensation of the second plate heat exchanger
Water intake gate, third plate heat exchanger coagulation hydroenergy backwater door, third plate heat exchanger condensed water intake gate are closed, heat supply network return water warp
After the high back pressure condenser water inlet electrically operated gate enters high back pressure condenser heating, through high back pressure condenser return water electricity
After dynamic door enters circulation pump of heat-supply network boosting, first heat exchangers for district heating, the second heat exchangers for district heating, third are respectively enterd
It externally supplies water after heat exchangers for district heating heating;
Step 2:When the high back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization system and put into operation, press
It is electronic that sequencing opens the first plate heat exchanger heat supply network water inlet electrically operated gate successively, the second plate heat exchanger heat supply network is intake
Door, third plate heat exchanger heat supply network water inlet electrically operated gate, the first plate heat exchanger heat supply network return water electrically operated gate, the second plate heat exchanger heat
Net return water electrically operated gate, third plate heat exchanger heat supply network return water electrically operated gate close the high back pressure condenser water inlet electrically operated gate, by first
Sequence opens the first plate heat exchanger coagulation hydroenergy backwater door, the first plate heat exchanger condensed water intake gate, second successively afterwards
Plate heat exchanger coagulation hydroenergy backwater door, the second plate heat exchanger condensed water intake gate, third plate heat exchanger coagulation hydroenergy backwater door,
Third plate heat exchanger condensed water intake gate, the at this time as described combined optimization system operational mode.
Compared with the prior art, the invention has the advantages that:The present invention is to solve highback press existing in the prior art
The low technological deficiency low with extraction and condensing unit condensing water temperature of group on-load ability is exchanged heat by adding several platen types in systems
Device, while the structural members such as electrically operated gate of mating respective numbers make heat supply network return water initially enter plate heat exchanger, other pumpings to be heated
High Back Pressure Steam Turbine Units condenser is entered back into after solidifying unit condensed water, so that heat supply network return water temperature is reduced 5-8 DEG C, High Back Pressure Steam Turbine Units back pressure drop
Low 8-13kPa, load increase 8-13MW, and the economic benefit of heating system further increases, while extraction and condensing unit condensed water can rise
High 20 DEG C or more, eight sections of steam extractions of exclusion enter the increase of steam turbine amount of work, and unit heat consumption rate reduces, and coa consumption rate reduces 0.7g/
kWh.The present invention is high suitable for a high back pressure thermal power plant unit and the combined system of any amount extraction and condensing unit and two or more
The combined system of back pressure thermal power plant unit and any amount extraction and condensing unit.The present invention is by coagulating heat supply network circulating water heating extraction and condensing unit
It bears water, high back pressure thermal power plant unit back pressure can be reduced, improve High Back Pressure Steam Turbine Units on-load ability and economic benefit, and pumping can be improved
Solidifying unit condensing water temperature, reduces extraction and condensing unit heat consumption rate, coa consumption rate.
Description of the drawings
Fig. 1 is the high back pressure circulating water heating of the present invention and takes out the preferred embodiment of solidifying thermal power plant unit combined optimization system
Overall frame structure schematic diagram.
Reference sign:
1 high back pressure condenser water inlet electrically operated gate;2 first plate heat exchanger heat supply networks water inlet electrically operated gate;3 second plate heat exchangers
Heat supply network water inlet electrically operated gate;4 third plate heat exchanger heat supply networks water inlet electrically operated gate;5 first plate heat exchanger heat supply network return water electrically operated gates;6
Second plate heat exchanger heat supply network return water electrically operated gate;7 third plate heat exchanger heat supply network return water electrically operated gates;8 first plate heat exchangers;9
Second plate heat exchanger;10 third plate heat exchangers;11 first plate heat exchanger coagulation hydroenergy backwater doors;12 first plate heat exchangers
Condensed water intake gate;13 second plate heat exchanger coagulation hydroenergy backwater doors;14 second plate heat exchanger condensed water intake gates;15 thirds
Plate heat exchanger coagulation hydroenergy backwater door;16 third plate heat exchanger condensed water intake gates;17 high back pressure condensers;18 high back pressures are solidifying
Vapour device return water electrically operated gate;19 circulation pump of heat-supply network;20 first heat exchangers for district heatings;21 second heat exchangers for district heatings;22 third heat supply networks add
Hot device;23 High Back Pressure Steam Turbine Units low pressure (LP) cylinders.
Specific implementation mode
With reference to Fig. 1 detailed description of the present invention high back pressure circulating water heatings and take out solidifying thermal power plant unit combined optimization system
And the technical solution of method.
As shown in Figure 1, high back pressure circulating water heating and the solidifying thermal power plant unit combined optimization system of pumping, including High Back Pressure Steam Turbine Units are low
Cylinder pressure 23, high back pressure condenser 17, high back pressure condenser inlet pipeline and heat supply network water return pipeline, High Back Pressure Steam Turbine Units low pressure (LP) cylinder 23 with
High back pressure condenser 17 is connected, and high back pressure condenser 17 is connected with the high back pressure condenser inlet pipeline, the highback
Pressure condenser inlet pipeline is connected with the heat supply network water return pipeline, including several plate heat exchangers, several plate-type heat-exchanges
Device is arranged in parallel in the high back pressure condenser inlet pipeline.
The high back pressure condenser inlet pipeline is equipped with high back pressure condenser water inlet electrically operated gate 1.
The plate heat exchanger preferably uses three, respectively the first plate heat exchanger 8, the second plate heat exchanger 9 and the
Three-plate type heat exchanger 10, the first plate heat exchanger 8 include the first heat supply network water inlet end and the first heat supply network backwater end, first heat supply network
Water inlet end is equipped with the first plate heat exchanger equipped with the first plate heat exchanger heat supply network water inlet electrically operated gate 2, the first heat supply network backwater end
Heat supply network return water electrically operated gate 5.Second plate heat exchanger 9 includes the second heat supply network water inlet end and the second heat supply network backwater end, second heat
Net water inlet end is equipped with the second plate-type heat-exchange equipped with the second plate heat exchanger heat supply network water inlet electrically operated gate 3, the second heat supply network backwater end
Device heat supply network return water electrically operated gate 6.Third plate heat exchanger 10 includes third heat supply network water inlet end and third heat supply network backwater end, the third
Heat supply network water inlet end is intake electrically operated gate 4 equipped with third plate heat exchanger heat supply network, and the third heat supply network backwater end is changed equipped with third is board-like
Hot device heat supply network return water electrically operated gate 7.
First plate heat exchanger 8 includes the first condensed water water inlet end and the first coagulation hydroenergy backwater end, first condensed water
Water inlet end is equipped with the first plate heat exchanger condensed water intake gate 12, and first coagulation hydroenergy backwater end is equipped with the first plate heat exchanger
Coagulation hydroenergy backwater door 11.Second plate heat exchanger 9 include the second condensed water water inlet end and the second coagulation hydroenergy backwater end, described second
Condensed water water inlet end is equipped with the second plate heat exchanger condensed water intake gate 14, and second coagulation hydroenergy backwater end is board-like equipped with second
Heat exchanger coagulation hydroenergy backwater door 13.Third plate heat exchanger 10 includes third condensed water water inlet end and third coagulation hydroenergy backwater end,
The third condensed water water inlet end is equipped with third plate heat exchanger condensed water intake gate 16, and third coagulation hydroenergy backwater end is equipped with
Third plate heat exchanger coagulation hydroenergy backwater door 15.
Add including high back pressure condenser water return pipeline, the first heat exchangers for district heating 20, the second heat exchangers for district heating 21, third heat supply network
Hot device 22, heat supply network water supply pipe, the high back pressure condenser water return pipeline are equipped with high back pressure condenser return water electrically operated gate 18 and heat
Net water circulating pump 19, the first heat exchangers for district heating 20, the second heat exchangers for district heating 21, third heat exchangers for district heating 22 be arranged in parallel respectively in
The high back pressure condenser water return pipeline and heat supply network water supply pipe.
High back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization method, and implement this method is in above-described embodiment
The high back pressure circulating water heating and pumping of any preferred embodiment coagulate thermal power plant unit combined optimization system, include the following steps:
Step 1:It is high before the high back pressure circulating water heating and the solidifying thermal power plant unit combined optimization system of pumping put into operation
Back pressure condenser intake electrically operated gate 1 open, the first plate heat exchanger heat supply network intake electrically operated gate 2, the second plate heat exchanger heat supply network into
Water electrically operated gate 3, third plate heat exchanger heat supply network water inlet electrically operated gate 4, the first plate heat exchanger heat supply network return water electrically operated gate 5, the second plate
Formula heat exchanger heat supply network return water electrically operated gate 6, third plate heat exchanger heat supply network return water electrically operated gate 7, the first plate heat exchanger condensed water return
Water valve 11, the first plate heat exchanger condensed water intake gate 12, the second plate heat exchanger coagulation hydroenergy backwater door 13, the second plate-type heat-exchange
Device condensed water intake gate 14, third plate heat exchanger coagulation hydroenergy backwater door 15, third plate heat exchanger condensed water intake gate 16 close
It closes, heat supply network return water returns after high back pressure condenser water inlet electrically operated gate 1 enters 17 heating of high back pressure condenser through high back pressure condenser
Water electrically operated gate 18 enter circulation pump of heat-supply network 19 boost after, respectively enter the first heat exchangers for district heating 20, the second heat exchangers for district heating 21,
Third heat exchangers for district heating 22 externally supplies water after heating;
Step 2:When the high back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization system and put into operation, press
Electrically operated gate 3 that sequencing opens the first plate heat exchanger heat supply network water inlet electrically operated gate 2 successively, the second plate heat exchanger heat supply network is intake,
Third plate heat exchanger heat supply network water inlet electrically operated gate 4, the first plate heat exchanger heat supply network return water electrically operated gate 5, the second plate heat exchanger heat
Net return water electrically operated gate 6, third plate heat exchanger heat supply network return water electrically operated gate 7 close high back pressure condenser water inlet electrically operated gate 1, by first
Sequence opens the first plate heat exchanger coagulation hydroenergy backwater door 11, the first plate heat exchanger condensed water intake gate 12, second successively afterwards
Plate heat exchanger coagulation hydroenergy backwater door 13, the second plate heat exchanger condensed water intake gate 14, third plate heat exchanger condensed water return
Water valve 15, third plate heat exchanger condensed water intake gate 16, the at this time as described combined optimization system operational mode.
Below this hair is further illustrated so that a High Back Pressure Steam Turbine Units and three take out and coagulate thermal power plant unit combined optimization system as an example
Bright advantageous effect:
It is known:55 DEG C of High Back Pressure Steam Turbine Units return water temperature, heat supply network circulating water flow Q1For 9000t/h, extraction and condensing unit condensed water
Temperature T2It is 20 DEG C, two extraction and condensing unit condensing water flow 1240t/h, three extraction and condensing unit condensing water flow Q2For 1860t/h,
Poor 0.3 DEG C of plate heat exchanger end.
It solves:Above-mentioned each item data is substituted into following equation and is iterated calculating:
C1×(T1-X)×Q1=C2×(Y-T2)×Q2
In formula:C1:Heat supply network return water specific volume;
C2:Condensed water specific volume;
X:Temperature after the cooling of heat supply network return water;
Y:Condensed water elevated temperature;
T1:Heat supply network return water temperature;
Result of calculation refers to table 1:
Table 1:
The present invention by adding several platen type heat exchangers, while the structures such as electrically operated gate of mating respective numbers in systems
Part makes heat supply network return water initially enter plate heat exchanger, and it is solidifying that High Back Pressure Steam Turbine Units are entered back into after other extraction and condensing unit condensed waters to be heated
Vapour device makes heat supply network return water temperature reduce 5-8 DEG C, and High Back Pressure Steam Turbine Units back pressure reduces 8-13kPa, and load increases 8-13MW, heat supply system
The economic benefit of system further increases, while extraction and condensing unit condensed water can increase 20 DEG C or more, and eight sections of steam extractions of exclusion enter steamer
Machine amount of work increases, and unit heat consumption rate reduces, and coa consumption rate reduces 0.7g/kWh.The present invention is suitable for a high back pressure thermal power plant unit
With the group of the combined system of any amount extraction and condensing unit and two or more high back pressure thermal power plant unit and any amount extraction and condensing unit
Collaboration is united.The present invention is by that by heat supply network circulating water heating extraction and condensing unit condensed water, can reduce high back pressure thermal power plant unit back pressure, carry
High High Back Pressure Steam Turbine Units on-load ability and economic benefit, and extraction and condensing unit condensing water temperature can be improved, reduce extraction and condensing unit heat consumption
Rate, coa consumption rate.
The present embodiment is only an optimal technical scheme, wherein involved all modules and connection relation and unlimited
This above-mentioned a kind of embodiment described in the embodiment, the setting and connection of all modules in the preferred embodiment
Relationship can carry out arbitrary permutation and combination and form complete technical solution.
Claims (10)
1. high back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization system, including High Back Pressure Steam Turbine Units low pressure (LP) cylinder(23), it is high
Back pressure condenser(17), high back pressure condenser inlet pipeline and heat supply network water return pipeline, High Back Pressure Steam Turbine Units low pressure (LP) cylinder(23)With highback
Press condenser(17)It is connected, high back pressure condenser(17)It is connected with the high back pressure condenser inlet pipeline, the highback
Pressure condenser inlet pipeline is connected with the heat supply network water return pipeline, which is characterized in that including several plate heat exchangers, if described
Dry plate heat exchanger parallel arrangement is in the high back pressure condenser inlet pipeline.
2. high back pressure circulating water heating as described in claim 1 and pumping coagulate thermal power plant unit combined optimization system, which is characterized in that
The high back pressure condenser inlet pipeline is equipped with high back pressure condenser water inlet electrically operated gate(1).
3. high back pressure circulating water heating as described in claim 1 and pumping coagulate thermal power plant unit combined optimization system, which is characterized in that
The plate heat exchanger uses three, respectively the first plate heat exchanger(8), the second plate heat exchanger(9)With third is board-like changes
Hot device(10), the first plate heat exchanger(8)Including the first heat supply network water inlet end and the first heat supply network backwater end, the first heat supply network water inlet
End is equipped with the first plate heat exchanger heat supply network water inlet electrically operated gate(2), the first heat supply network backwater end is equipped with the first plate heat exchanger heat
Net return water electrically operated gate(5).
4. high back pressure circulating water heating as claimed in claim 3 and pumping coagulate thermal power plant unit combined optimization system, which is characterized in that
Second plate heat exchanger(9)Including the second heat supply network water inlet end and the second heat supply network backwater end, the second heat supply network water inlet end is equipped with the
Double-plate heat exchanger heat supply network water inlet electrically operated gate(3), the second heat supply network backwater end is equipped with the second plate heat exchanger heat supply network return water electricity
Dynamic door(6).
5. high back pressure circulating water heating as claimed in claim 3 and pumping coagulate thermal power plant unit combined optimization system, which is characterized in that
Third plate heat exchanger(10)Including third heat supply network water inlet end and third heat supply network backwater end, the third heat supply network water inlet end is equipped with the
Three-plate type heat exchanger heat supply network water inlet electrically operated gate(4), the third heat supply network backwater end is equipped with third plate heat exchanger heat supply network return water electricity
Dynamic door(7).
6. high back pressure circulating water heating as claimed in claim 3 and pumping coagulate thermal power plant unit combined optimization system, which is characterized in that
First plate heat exchanger(8)Including the first condensed water water inlet end and the first coagulation hydroenergy backwater end, the first condensed water water inlet end
Equipped with the first plate heat exchanger condensed water intake gate(12), first coagulation hydroenergy backwater end is condensed equipped with the first plate heat exchanger
Water return water door(11).
7. high back pressure circulating water heating as claimed in claim 3 and pumping coagulate thermal power plant unit combined optimization system, which is characterized in that
Second plate heat exchanger(9)Including the second condensed water water inlet end and the second coagulation hydroenergy backwater end, the second condensed water water inlet end
Equipped with the second plate heat exchanger condensed water intake gate(14), second coagulation hydroenergy backwater end is condensed equipped with the second plate heat exchanger
Water return water door(13).
8. high back pressure circulating water heating as claimed in claim 3 and pumping coagulate thermal power plant unit combined optimization system, which is characterized in that
Third plate heat exchanger(10)Including third condensed water water inlet end and third coagulation hydroenergy backwater end, the third condensed water water inlet end
Equipped with third plate heat exchanger condensed water intake gate(16), third coagulation hydroenergy backwater end is condensed equipped with third plate heat exchanger
Water return water door(15).
9. high back pressure circulating water heating as described in claim 1 and pumping coagulate thermal power plant unit combined optimization system, which is characterized in that
Including high back pressure condenser water return pipeline, the first heat exchangers for district heating(20), the second heat exchangers for district heating(21), third heat exchangers for district heating
(22), heat supply network water supply pipe, the high back pressure condenser water return pipeline be equipped with high back pressure condenser return water electrically operated gate(18)And heat
Net water circulating pump(19), the first heat exchangers for district heating(20), the second heat exchangers for district heating(21), third heat exchangers for district heating(22)Respectively simultaneously
Connection is arranged in the high back pressure condenser water return pipeline and heat supply network water supply pipe.
10. high back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization method, implement this method is claim 1 to 9
The high back pressure circulating water heating and pumping of any one coagulate thermal power plant unit combined optimization system, which is characterized in that include the following steps:
Step 1:Before the high back pressure circulating water heating and the solidifying thermal power plant unit combined optimization system of pumping put into operation, high back pressure
Condenser water inlet electrically operated gate(1)It opens, the first plate heat exchanger heat supply network water inlet electrically operated gate(2), the second plate heat exchanger heat supply network into
Water electrically operated gate(3), third plate heat exchanger heat supply network intake electrically operated gate(4), the first plate heat exchanger heat supply network return water electrically operated gate(5),
Second plate heat exchanger heat supply network return water electrically operated gate(6), third plate heat exchanger heat supply network return water electrically operated gate(7), the first plate-type heat-exchange
Device coagulation hydroenergy backwater door(11), the first plate heat exchanger condensed water intake gate(12), the second plate heat exchanger coagulation hydroenergy backwater door
(13), the second plate heat exchanger condensed water intake gate(14), third plate heat exchanger coagulation hydroenergy backwater door(15), third is board-like changes
Hot device condensed water intake gate(16)It closes, heat supply network return water is through high back pressure condenser water inlet electrically operated gate(1)Into high back pressure condenser
(17)After heating, through high back pressure condenser return water electrically operated gate(18)Into circulation pump of heat-supply network(19)After boosting, is respectively enterd
One heat exchangers for district heating(20), the second heat exchangers for district heating(21), third heat exchangers for district heating(22)It externally supplies water after heating;
Step 2:When the high back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization system and put into operation, by successively
Sequence opens the first plate heat exchanger heat supply network water inlet electrically operated gate successively(2), the second plate heat exchanger heat supply network intake electrically operated gate(3),
Third plate heat exchanger heat supply network water inlet electrically operated gate(4), the first plate heat exchanger heat supply network return water electrically operated gate(5), the second plate-type heat-exchange
Device heat supply network return water electrically operated gate(6), third plate heat exchanger heat supply network return water electrically operated gate(7), it is electronic to close the water inlet of high back pressure condenser
Door(1), the first plate heat exchanger coagulation hydroenergy backwater door is sequentially opened successively(11), the first plate heat exchanger condensed water into
Water valve(12), the second plate heat exchanger coagulation hydroenergy backwater door(13), the second plate heat exchanger condensed water intake gate(14), third plate
Formula heat exchanger coagulation hydroenergy backwater door(15), third plate heat exchanger condensed water intake gate(16), the as described combined optimization at this time
System running pattern.
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| CN117078047A (en) * | 2023-10-16 | 2023-11-17 | 华能济南黄台发电有限公司 | LSTM-based heat load prediction and distribution optimization method and system |
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