CN206709049U - A kind of thermal power plant waste heat comprehensive utilization system - Google Patents
A kind of thermal power plant waste heat comprehensive utilization system Download PDFInfo
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- CN206709049U CN206709049U CN201720419948.XU CN201720419948U CN206709049U CN 206709049 U CN206709049 U CN 206709049U CN 201720419948 U CN201720419948 U CN 201720419948U CN 206709049 U CN206709049 U CN 206709049U
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The utility model discloses a kind of thermal power plant waste heat comprehensive utilization system, including steam turbine, two heat pumps being connected with steam turbine, two heat pumps are communicated to 1# low-pressure heaters by condensate pump, 1# heat pumps connect low-level (stack-gas) economizer, 2# low-pressure heaters and 1# low-pressure heaters by circulating line and form loop, and low-level (stack-gas) economizer is simultaneously sequentially communicated 3# low-pressure heaters, oxygen-eliminating device to feed pump；Low-level (stack-gas) economizer is communicated to air preheater to boiler jointly with 2# heat pumps respectively；Feed pump is communicated to boiler through pipeline communication medium temperature economizer and high-pressure heater to economizer respectively.The utility model is novel in design, energy-saving effect is obvious, turbine discharge waste heat can effectively be reclaimed, realize the utilization step by step of boiler exhaust gas, greatly improve turbine LP rotors efficiency, gross coal consumption rate is reduced, cold end loss caused by existing turbine discharge is greatly decreased, reduces coal consumption, noxious gas emission is reduced, there is extremely strong effects of energy saving and emission reduction.
Description
Technical field
The utility model belongs to surplus heat of power plant field of comprehensive utilization, is to utilize heat pump recovery circulating water afterheat and heat-setting
Water and boiler air-supply, it is real using the smoke evacuation heating part high-pressure feed water of boiler high-quality and the technological process of condensate, the technique
Effective recovery of Turbine Cold Junction waste heat and the utilization step by step of boiler exhaust gas heat are showed.
Background technology
Steam turbine cycle water system is the chief component of Turbine Cold Junction, and recirculated water cools down steam turbine in condenser
Steam discharge, cooled down in cooling tower by direct or indirect mode, circulation is re-started through water circulating pump boosting after cooling.
Its function is that cooling water (seawater) is delivered into condenser to go to cool down turbine discharge, to maintain the vacuum of condenser, makes carbonated drink
Circulation is continued.At present, circulation is mainly used in direct water-cooling system and indirect air cooling.Direct water-cooling system is
It is made up of condenser, cooling tower, trash rack, water circulating pump, outlet hydraulic butterfly valve, circulating water supply system etc..Its system is basic
Flow is：Cooling tower → follow pump house forebay → trash rack → rotary sieve → and follow pump → outlet electric butterfly valve → supply channel → coagulates
Vapour device → water return pipeline → cooling tower.Indirect air cooling system refers to turbine discharge using water as intermediate medium, by steam discharge and air
Between heat exchange carry out at twice：Once exchanged heat between steam and cooling water in condenser；It is once cooling water and sky
Gas exchanges heat in air cooling tower.It is mainly by condenser, cooling tower, water circulating pump, circulating water supply system, circulating water unit
And the composition such as pumped vacuum systems, wherein use surface condenser coagulates formula indirect air cooling for table, using direct-contact type condenser
For mixed condensation type indirect air cooling.Its system basic procedure is：Cooling tower → water circulating pump → outlet electric butterfly valve → supply channel →
Condenser → water return pipeline → indirect air cooling cooling unit.
The heat that turbine discharge is contained is taken away through recirculated water, is discharged into by direct or indirect mode in environment
Go, general 300MW is super to close on unit, and main steam enthalpy is about 3500KJ/Kg, and turbine discharge enthalpy is about 2400KJ/Kg, row
Steam flow amount is about 650t/h.Condensate enthalpy is about 200-300KJ/Kg.From the perspective of using energy source, fuel combustion heating
Only have 40% or so to be changed into electric energy in amount, the steam discharge of condensing turbine contains more than 50% heat, but the energy product
Matter is relatively low, it is difficult to be used directly, can only be directly discharged to by water or air in environment, this not only causes the huge of energy
Waste, strong influence also is caused to environment.
For the design exhaust gas temperature of boiler mostly at 120--140 DEG C, actual motion exhaust gas temperature typically also wants more slightly higher, and
The discharge smoke temperature of power station boiler of a part of burning high sulfur coal and lignite is up to 160 DEG C of even more highs.Boiler efficiency is about 88%--
94%, in various heat loss, heat loss due to exhaust gas accounts for more than half of boiler heat loss.If it can effectively reduce station boiler
Exhaust gas temperature is to 70--90 DEG C, and boiler efficiency will improve 2-5 percentage points, and net coal consumption rate will decline 2--6g/ (kWh).At present,
It is to install low temperature additional in the back-end ductwork of air preheater outlet to save with widest flue gas in power station boiler UTILIZATION OF VESIDUAL HEAT IN mode
Coal device, steam turbine condensate is heated using the low-temperature flue gas of station boiler, part extracted steam from turbine is saved, increases unit output,
But the utilization step by step to flue gas is not implemented in the program, relatively inefficient.
To increase the mean temperature of water endothermic process in boiler, reduce caused by heat transfer temperature differenceDamage, improves whole machine
The efficiency of group, after turbine discharge cools down in cold end system, before boiler is entered, it need to be preheated.Condensate passes through
Condensate pump boosts, and into heat regenerative system of drawing gas, it mainly includes：Extraction line, electrically operated gate of drawing gas, the non-return flap that draws gas, low pressure
Heater, oxygen-eliminating device and high-pressure heater, drain water piping etc..The system mainly using extracted steam from turbine come heat-setting water and
Feedwater.From the viewpoint of heat energy method, some vapor extracted out from steam turbine fails to continue to do work in steam turbine, is doing internal strength amount
One timing adds new steam consumption.
In recent years, domestic electrical industry began to focus on and studied Turbine Cold Junction system optimization, but most of research institutions
The monitoring and optimal control, the fouling problem of condenser for being mainly focused on Turbine Cold Junction performance are asked with, recirculated water secondary filter
Topic, air cooling tubes condenser improve radiating efficiency, improve unit vacuum etc., can not be accumulate to greatest extent using turbine discharge
The heat contained.
With continuous ripe and single-machine capacity the continuous increase of heat pump techniques, heat pump is used in waste heat by more and more extensive
The every field utilized.Heat pump is a kind of using steam or fuel as driving, and heat is pumped from low-temperature heat source to high temperature heat source
The circulatory system.It is by critical pieces such as generator 101, condenser 102, evaporator 103, absorber 104 and heat exchanger 105 and molten
The slave part such as liquid pump and working medium pump forms, as shown in Figure 1.Steam or fuel discharge heat Qg in generator, heat bromination
Lithium weak solution simultaneously produces refrigerant vapour, and refrigerant vapour enters condenser, and the Qc heating of release condensation heat is flowed through in condenser thermal transfer pipe
Hot water, itself be condensed into after liquid and enter evaporator through choke valve, water as refrigerant arrives heat-transfer pipe of evaporator table through working medium pump spray
Face, the heat Qe of the low-temperature heat source flowed through in heat-transfer pipe is absorbed, flow out unit after making thermal source release heat, water as refrigerant absorbs heat
After be vaporized into refrigerant vapour, into absorber, the lithium-bromide solution after being concentrated by generator sprays after returning to absorber, absorb from
The refrigerant vapour that evaporator comes, and release and absorb hot Qa, heating flows through the cold water in absorber heat-transfer pipe.Cold water flows through absorption
After device, condenser heating, discharged from hot water outlet.
Utility model content
Technical problem to be solved in the utility model is to be directed to above-mentioned deficiency of the prior art, there is provided a kind of firepower
Waste heat of power plant comprehensively utilizes new technology, and in summary, the utility model is novel in design, energy-saving effect is obvious, can effectively reclaim
Turbine discharge waste heat, the utilization step by step of boiler exhaust gas is realized, greatly improve turbine LP rotors efficiency, reduce generating coal
Consumption, cold end loss caused by existing turbine discharge is greatly decreased, full factory's make-up water percentage is greatly reduced, reduces coal consumption, reduce
Noxious gas emission, there is extremely strong effects of energy saving and emission reduction.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of thermal power plant waste heat comprehensive utilization system, including steam turbine, two heat pumps being connected with steam turbine, two
Individual heat pump is communicated to 1# low-pressure heaters by condensate pump, and one of 1# heat pumps connect low temperature by circulating line and save coal
Device, 2# low-pressure heaters and 1# low-pressure heaters form loop, and low-level (stack-gas) economizer is simultaneously sequentially communicated 3# low-pressure heaters, oxygen-eliminating device
To feed pump；Low-level (stack-gas) economizer is communicated to air preheater jointly with another 2# heat pump all the way, and air preheater is through economizer
It is communicated to boiler；Low-level (stack-gas) economizer another way connects economizer to boiler through medium temperature economizer；
Feed pump is communicated to boiler through pipeline communication medium temperature economizer and high-pressure heater to economizer respectively.
Further, the steam turbine is respectively communicated with 1# heat pumps by blow-off line and extracted steam from turbine to heat pump steam line
With 2# heat pumps.
Further, the 1# heat pumps and 2# heat pumps drive steam drainage pipeline and 1#, 2# heat pump by 1#, 2# heat pump respectively
Condensate line connects condensate pipe to condensate pump jointly.
Further, the 1# heat pumps go out heat pump circuits by condensate and connect low-level (stack-gas) economizer to 2# low-pressure heaters, logical
Cross condensate to heat pump inlet pipeline and connect 1# low-pressure heaters and 2# low-pressure heaters composition loop.
Further, the low-level (stack-gas) economizer is communicated to chimney by air-introduced machine.
Further, the 2# heat pumps connect pressure fan by pressure fan outlet conduit.
Further, the extracted steam from turbine to heat pump steam line, blow-off line, 1#, 2# steam drainage pipeline, heat pump coagulates
Bear water pipeline, 1#, 2# condensate line, condensate and go out heat pump circuits, condensate to heat pump inlet pipeline, pressure fan outlet
Road, the pipeline of feed pump connection medium temperature economizer, the pipeline of low-level (stack-gas) economizer connection medium temperature economizer, the connection of medium temperature economizer save
Valve is respectively equipped with the pipeline of coal device.
The utility model has advantages below compared with prior art：
1st, it is novel in design.Turbine discharge is introduced directly into heat pump by being mainly characterized by of the design, and utilizes extracted steam from turbine
High steam driving heat pump, absorb the turbine discharge latent heat of vaporization, condensate is heated, low-pressure heater can be reduced and taken out
Vapour amount, improve turbine efficiency.Heat pump is installed additional before conventional rotary regenerative air preheater, absorbs turbine discharge vapour using heat pump
Change latent heat, carry out heating boiler air-supply, improve air preheater entrance wind pushing temperature, reduce exhaust gas volumn needed for air preheater；By what is reduced
Flue gas, for being preheated to boiler feedwater, to reduce the amount of drawing gas needed for high-pressure heater, save higher steam turbine and take out
Vapour, so as to realize more preferable energy-saving effect.
2nd, energy-saving effect is obvious.The design can pump low-temperature heat source to high temperature heat source using heat pump the characteristic of heat, will
Turbine discharge waste heat makes full use of, and not only reduces the loss of turbine discharge, more arranges progress to heated surface at the end of boiler
Adjustment, realizes the utilization step by step of boiler exhaust gas, the amount of drawing gas of Steam Turbine Regenerative System is greatly reduced, alleviates to environment
Thermal pollution.The design can greatly improve turbine LP rotors efficiency, reduce gross coal consumption rate, reduce existing turbine discharge
Caused by cold end loss, realize the utilization step by step of boiler exhaust gas, there is extremely strong effects of energy saving and emission reduction.
3rd, full factory's make-up water percentage is greatly reduced.Most important direct water-cooling unit with water is circulation moisturizing, due to this
New design system has completely abolished circulation, and the waste of the water resource caused by circulating water loss can be greatly reduced.
4th, the amount of being sparing in the use of coal.For coal in burning, the heat discharged absorbs generation steam by water in boiler, enters through pipeline
Enter heat exchanger, the utilization rate of the higher coal of boiler efficiency is higher.Heat pump has reclaimed substantial amounts of heat after putting into operation, can subtract
Few boiler output, saves substantial amounts of coal.It is estimated that 300MW units, can save 120,000 tons or so of coal every year.
5th, noxious gas emission is reduced.Coal can discharge big waste gas during burning, be discharged according to coal per ton
2.62 tons of CO2, SO2 8.5kg NOx 7.4kg calculate [13], can reduce CO2 every year and discharge 420,000 tons, reduce SO2 discharges 12
Ton, reduce 12 tons of NOx emission.
The utility model is novel in design, energy-saving effect is obvious, can effectively reclaim turbine discharge waste heat, realize boiler exhaust gas
Utilization step by step, greatly improve turbine LP rotors efficiency, reduce gross coal consumption rate, existing turbine discharge is greatly decreased and causes
Cold end loss, reduce coal consumption, reduce noxious gas emission, there is extremely strong effects of energy saving and emission reduction.
Brief description of the drawings
Fig. 1 heat pump operation principle schematic diagrams；
Fig. 2 is the utility model structure diagram.
Description of reference numerals：101-generator；102-condenser；103-evaporator；104-absorber；105-change
Hot device.
1- steam turbines；2-1# heat pumps；2 ' -2# heat pumps；3- boilers；4- blow-off lines；5/5 ' -1#, 2# turbine discharges are extremely
Heat pump enters porthole；6- extracted steam from turbines are to heat pump steam line；7- extracted steam from turbines are to heat pump steam supply non-return flap；7 '-auxiliary is steamed
Vapour is to heat pump steam supply non-return flap；8 '-auxiliary steam is to heat pump steam supply electrically operated gate；8- extracted steam from turbines are to heat pump steam supply electrically operated gate；
9/9 ' -1#, 2# heat pumps driving steam inlet stop valve；10/10 ' -1#, 2# heat pumps driving steam drainage pipeline；11/11’-1#、
2# heat pumps drive steam drainage electrically operated gate；12/12 ' -1#, 2# heat pump condensate lines；13/13 ' -1#, 2# heat pumps condensate row
Water electrically operated gate；14- condensate tanks；15- condensate pumps；16- condenses water exit conduit；17-1# low-pressure heaters；18-1# low pressure
Heater inlet electrically operated gate；19- condensates are to heat pump inlet pipeline；20- condensates enter heat pump electric check valve；21- condensates
Go out heat pump circuits；22- condensates go out heat pump electric check valve；23- low-level (stack-gas) economizers；24-2# low-pressure heaters；25-2# low pressure
Heater outlet electrically operated gate；26-3# low-pressure heaters；27- oxygen-eliminating devices；28- feed pumps；29- medium temperature economizer inlet pipelines；
30- medium temperature economizers；31- medium temperatures economizer water inlet electric check valve；32- medium temperature economizer water outlet electric check valves；33- high pressures
Heater；34- high-pressure heater outlet pipelines；35- economizer inlet pipelines；36- economizers；37- economizer exits are pre- to sky
Device smoke discharging pipe；38- air preheaters；39- air preheaters export smoke discharging pipe；40- economizer exits to medium temperature economizer is discharged fume
Pipeline；41- medium temperature economizer inlet baffles；42- medium temperature economizer exit baffle plates；43- medium temperature economizer exit smoke discharging pipes；
44- low-level (stack-gas) economizer smoke discharging pipes；45- air-introduced machines；46- chimneys；47- pressure fan；48- pressure fan outlet conduits；49- pressure fan
To heat pump inlet baffle；50- pressure fan is to heat pump outlet damper；51- heat pump bypass baffle plates.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
As shown in Fig. 2 the utility model thermal power plant waste heat comprehensive utilization system, including steam turbine 1, with steam turbine 1
Two heat pumps 2,2 ' being connected, two heat pumps 2,2 ' are communicated to 1# low-pressure heaters 17 by condensate pump 15, one of them
1# heat pumps 2 connect low-level (stack-gas) economizer 23,2# low-pressure heaters 24 and 1# low-pressure heaters 17 by circulating line and form loop, low
Warm economizer 23 is simultaneously sequentially communicated 3# low-pressure heaters 26, oxygen-eliminating device 27 to feed pump 28；The tunnel of low-level (stack-gas) economizer 23 1 with it is another
Individual 2# heat pumps 2 ' are communicated to air preheater 38 jointly, and air preheater 38 is communicated to boiler 3 through economizer 36；Low-level (stack-gas) economizer
23 another ways connect economizer 36 to boiler 3 through medium temperature economizer 30；Feed pump 28 is respectively through pipeline communication medium temperature economizer 30
Boiler 3 is communicated to high-pressure heater 33 to economizer 36.
Wherein, steam turbine 1 is respectively communicated with the He of 1# heat pumps 2 by blow-off line 4 and extracted steam from turbine to heat pump steam line 6
2# heat pumps 2 '.1# heat pumps 2 and 2# heat pumps 2 ' drive steam drainage pipeline 10/10 ' and 1#, 2# heat pump to condense by 1#, 2# heat pump
Water lines 12/12 ' connect condensate tank 14 to condensate pump 15 jointly.
Wherein, 1# heat pumps 2 go out heat pump circuits 21 by condensate and connect low-level (stack-gas) economizer 23 to 2# low-pressure heaters 24, logical
Cross condensate to heat pump inlet pipeline 19 and connect 1# low-pressure heaters 17 and the composition of 2# low-pressure heaters 24 loop.Low-level (stack-gas) economizer
23 are communicated to chimney 46 by low-level (stack-gas) economizer smoke discharging pipe 44 through air-introduced machine 45.2# heat pumps 2 ' pass through pressure fan outlet conduit 48
Connect pressure fan 47.
Wherein, extracted steam from turbine to heat pump steam line 6 is provided with extracted steam from turbine to heat pump steam supply non-return flap 7, steamer
Machine draws gas to heat pump steam supply electrically operated gate 8 and 1#, 2# heat pump driving steam inlet stop valve 9,9 '；Extracted steam from turbine is to heat pump steam supply
An auxiliary branch is additionally provided with pipeline 6, provided with auxiliary steam to heat pump steam supply non-return flap 7 ', auxiliary steam to heat pump steam supply electricity
Dynamic door 8 '；Blow-off line 4 enters porthole 5,5 ' provided with 1#, 2# turbine discharge to heat pump；1#, 2# heat pump drive steam drainage pipe
Be respectively equipped with road 10,10 ' and 1#, 2# heat pump condensate line 12,12 ' 1#, 2# heat pump driving steam drainage electrically operated gate 11,
11 ' and 1#, 2# heat pump condensation water drainage electrically operated gate 13,13 '；Condensate goes out heat pump circuits 21, and provided with condensate to go out heat pump electronic
Stop valve 22,2# low-pressure heaters 24 are provided with 2# low-pressure heaters outlet electrically operated gate 25；Condensate is to heat pump inlet pipeline 19
Enter heat pump electric check valve 20 provided with condensate, condensate pump 15 connects 1# low-pressure heaters through condensing water exit conduit 16
17,1# low-pressure heaters 17 are provided with 1# low-pressure heater imports electrically operated gate 18；Pressure fan outlet conduit 48 is provided with pressure fan
Connect medium temperature to heat pump inlet baffle 49, heat pump bypass baffle plate 51 and pressure fan to heat pump outlet damper 50, feed pump 28 and save coal
The medium temperature economizer inlet pipeline 29 of device 30 is provided with medium temperature economizer water inlet electric check valve 31, during low-level (stack-gas) economizer 23 connects
The medium temperature economizer exit smoke discharging pipe 43 of warm economizer 30 is provided with medium temperature economizer exit baffle plate 42, and medium temperature economizer 30 connects
The economizer inlet pipeline 35 of logical economizer 36 is provided with medium temperature economizer water outlet electric check valve 32, and economizer exit is into
Warm economizer smoke discharging pipe 40 is provided with medium temperature economizer inlet baffle 41.
The operation principle of the system is as follows：
During actual use, before condensate pump starts, first to the moisturizing of condensate tank 14 to ordinary water level, start condensate pump,
Condensate walks recycling, after condensate pump is stable, gradually opens the condensate of 1# heat pumps 2 to be put into operation and enters the electronic cut-off of heat pump
Valve 20, condensate go out heat pump electric check valve 22, close condensate to 1# low-pressure heater imports electrically operated gate 18,2# low-pressure heatings
Device exports electrically operated gate 25.After auxiliary steam pressure is more than 0.4MPa, auxiliary steam is opened to heat pump steam supply non-return flap 7 ', it is crack auxiliary
Steam is helped the 1# heat pumps driving steam inlet stop valve 9 of crack 1# heat pumps 2, to open 1# heat pumps to heat pump steam supply electrically operated gate 8 ' and drive
Dynamic steam drainage electrically operated gate 11, heating coil is carried out to auxiliary steam to heat pump steam supply pipeline.Before steam turbine starts, standard-sized sheet steam turbine row
1# turbine discharges to the heat pump of vapour to 1# heat pumps 2 enters porthole 5 and 1# heat pump condensation water drainages electrically operated gate 13, opens 2# steam turbines
Steam discharge to heat pump enters porthole 5 ' and 2# heat pump condensation water drainages electrically operated gate 13 '.After steam turbine starts, standard-sized sheet auxiliary steam to heat pump
Steam supply electrically operated gate 8 ' and 2# heat pumps driving steam drainage electrically operated gate 11 '.The crack pressure fan of 2# heat pumps 2 ' to be put into operation is to heat pump entrance
Baffle plate 49, pressure fan to heat pump outlet damper 50, turn down heat pump bypass baffle plate 51；Auxiliary steam is opened to the 2# heat of 2# heat pumps 2 '
Pump driving steam inlet stop valve 9 ' and heat pump driving steam drainage electrically operated gate 11 ', start 2# heat pumps 2 '.When air preheater entrance is sent
It is crack to medium temperature economizer water inlet electric check valve 31 and medium temperature economizer water outlet electric check valve when air temperature is gradually increasing
32, crack medium temperature economizer inlet baffle 41, crack medium temperature economizer exit baffle plate 42.When air preheater outlet temperature is low more than 2#
When pressing more than 10 DEG C of heater 24 outlet temperature, standard-sized sheet condensate turns down 1# low-pressure heatings to heat pump Inlet and outlet water electric check valve
Device import electrically operated gate 18,2# low-pressure heaters outlet electrically operated gate 25.
When unit load raises, after extracted steam from turbine reaches 0.4MPa to heat pump steam supply pipeline (6) pressure, heat pump is driven
Dynamic vapour source gradually switches to extracted steam from turbine from auxiliary steam.When unit load declines, extracted steam from turbine to heat pump steam supply pipe
Road (6) pressure reaches less than after 0.4MPa, and heat pump driving vapour source gradually is switched into auxiliary steam from extracted steam from turbine.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is imposed any restrictions, every
Any simple modification, change and the equivalent structure change made according to the utility model technical spirit to above example, still
Belong in the protection domain of technical solutions of the utility model.
Claims (7)
- A kind of 1. thermal power plant waste heat comprehensive utilization system, it is characterised in that：Including steam turbine (1), it is connected with steam turbine (1) Logical two heat pumps (2,2 '), two heat pumps (2,2 ') are communicated to 1# low-pressure heaters (17) by condensate pump (15), wherein One 1# heat pump (2) connects low-level (stack-gas) economizer (23), 2# low-pressure heaters (24) and 1# low-pressure heaters by circulating line (17) loop is formed, low-level (stack-gas) economizer (23) is simultaneously sequentially communicated 3# low-pressure heaters (26), oxygen-eliminating device (27) to feed pump (28)； Low-level (stack-gas) economizer (23) is communicated to air preheater (38), air preheater (38) warp jointly with another 2# heat pump (2 ') all the way Economizer (36) is communicated to boiler (3)；Low-level (stack-gas) economizer (23) another way connects economizer (36) extremely through medium temperature economizer (30) Boiler (3)；Feed pump (28) is communicated to through pipeline communication medium temperature economizer (30) and high-pressure heater (33) to economizer (36) respectively Boiler (3).
- A kind of 2. thermal power plant waste heat comprehensive utilization system according to claim 1, it is characterised in that：The steam turbine (1) 1# heat pumps (2) and 2# heat pumps (2 ') are respectively communicated with by blow-off line (4) and extracted steam from turbine to heat pump steam line (6).
- A kind of 3. thermal power plant waste heat comprehensive utilization system according to claim 1, it is characterised in that：The 1# heat pumps (2) and 2# heat pumps (2 ') drive steam drainage pipeline (10/10 ') and 1#, 2# heat pump condensate line by 1#, 2# heat pump respectively (12/12 ') connects condensate tank (14) to condensate pump (15) jointly.
- A kind of 4. thermal power plant waste heat comprehensive utilization system according to claim 1, it is characterised in that：The 1# heat pumps (2) by condensate go out heat pump circuits (21) connect low-level (stack-gas) economizer (23) to 2# low-pressure heaters (24), by condensate extremely Heat pump inlet pipeline (19) connection 1# low-pressure heaters (17) and 2# low-pressure heaters (24) form loop.
- A kind of 5. thermal power plant waste heat comprehensive utilization system according to claim 1, it is characterised in that：The low temperature saves Coal device (23) is communicated to chimney (46) by air-introduced machine (45).
- A kind of 6. thermal power plant waste heat comprehensive utilization system according to claim 1, it is characterised in that：The 2# heat pumps (2 ') connect pressure fan (47) by pressure fan outlet conduit (48).
- A kind of 7. thermal power plant waste heat comprehensive utilization system according to claim any one of 1-6, it is characterised in that：Institute Extracted steam from turbine is stated to heat pump steam line (6), blow-off line (4), 1#, 2# steam drainage pipeline (10/10 '), 1#, 2# heat pump Condensate line (12/12 '), condensate go out heat pump circuits (21), condensate to heat pump inlet pipeline (19), pressure fan outlet Road (48), the pipeline of feed pump (28) connection medium temperature economizer (30), low-level (stack-gas) economizer (23) connect medium temperature economizer (30) Pipeline, medium temperature economizer (30) connect and are respectively equipped with valve on the pipeline of economizer (36).
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| CN201720419948.XU CN206709049U (en) | 2017-04-20 | 2017-04-20 | A kind of thermal power plant waste heat comprehensive utilization system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109189029A (en) * | 2018-10-18 | 2019-01-11 | 国电南京电力试验研究有限公司 | Thermal power plant low-level (stack-gas) economizer amount of energy saving line monitoring system and method |
-
2017
- 2017-04-20 CN CN201720419948.XU patent/CN206709049U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109189029A (en) * | 2018-10-18 | 2019-01-11 | 国电南京电力试验研究有限公司 | Thermal power plant low-level (stack-gas) economizer amount of energy saving line monitoring system and method |
| CN109189029B (en) * | 2018-10-18 | 2023-04-28 | 国能南京电力试验研究有限公司 | Energy-saving on-line monitoring system and method for low-temperature economizer of thermal power plant |
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Effective date of registration: 20180730 Address after: 710065 No. 1 building, No. 12, Qin Tang, No. 187, science and technology four road, hi tech Zone, Xi'an, Shaanxi Patentee after: North China Electric Power Research Institute Co., Ltd. Xi'an branch Address before: 710065 No. 1 building, No. 12, Qin Tang, No. 187, science and technology four road, hi tech Zone, Xi'an, Shaanxi Patentee before: North China Electrical Power Research Institute (Xi'an) Co., Ltd. |