CN108469017A - A kind of pair is dragged electric pump back pressure turbine comprehensive utilization device and its method - Google Patents
A kind of pair is dragged electric pump back pressure turbine comprehensive utilization device and its method Download PDFInfo
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- CN108469017A CN108469017A CN201810299973.8A CN201810299973A CN108469017A CN 108469017 A CN108469017 A CN 108469017A CN 201810299973 A CN201810299973 A CN 201810299973A CN 108469017 A CN108469017 A CN 108469017A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 109
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 80
- 238000010612 desalination reaction Methods 0.000 claims description 48
- 239000000779 smoke Substances 0.000 claims description 25
- 230000008676 import Effects 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 238000006392 deoxygenation reaction Methods 0.000 claims description 6
- 238000006477 desulfuration reaction Methods 0.000 claims description 6
- 230000023556 desulfurization Effects 0.000 claims description 6
- 239000003546 flue gas Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000010248 power generation Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 14
- 230000002209 hydrophobic effect Effects 0.000 abstract description 5
- 239000003517 fume Substances 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 230000007812 deficiency Effects 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000013475 authorization Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- 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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a kind of pair to drag electric pump back pressure turbine comprehensive utilization device, including feed pump, back pressure turbine, timing gear roller box, generator, warm pocket, pressure fan, air preheater, boiler, bag filter, air-introduced machine, low low-level (stack-gas) economizer, oxygen-eliminating device, desulfurizing tower, chimney.The invention also discloses the methods of device comprehensive utilization.Structure of the invention is reasonable, using back pressure turbine steam discharge as warm pocket air source, solves the problems, such as the stifled ash of boiler air preheater low-temperature corrosion, and the use of low low-level (stack-gas) economizer solves the problems, such as the high fume temperature of warm blanking bar, warm pocket is hydrophobic is again introduced into boiler system further through low low-level (stack-gas) economizer, substantially increases generatine set heat efficiency and resource utilization.
Description
Technical field
The present invention relates to cogeneration units high efficient energy sources to utilize, energy-conserving and emission-cutting technology field, and in particular to a kind of pair is dragged
Electric pump back pressure turbine comprehensive utilization device and its method.
Background technology
Coal fired thermal power plant is the main enterprises of China's power generation, has 78% electricity to come from Coal-fired Thermal Power in national electricity consumption
Factory.AND ENERGY RESOURCES CONSUMPTION IN CHINA will exploit the primary energy of nearly 2,000,000,000 tons of standard coals every year based on coal, convert into RMB about 1
The industrial output value of trillion yuan, wherein nearly half is burnt up by power plant boiler.Therefore, coal-burning power plant advocates section comprehensively at this stage
It can be transformed, coal consumption for power generation is greatly reduced and improve energy utilization rate, energy-saving and emission-reduction reach power industry with this and clean, efficiently
Change development.
Currently, power plant watering cycle can use feed pump, power plant generally uses Steam Turbine Driven feed pump, i.e. vapour at present
One end of the axis of turbine drives feed pump, and what is mainly solved is the power-consuming problem of feed pump.For relatively economical performance, more multiselect
Back pressure turbine has been selected as feed-water pump turbine.But in order to meet unit in summer long period oepration at full load, back pressure steam
The nominal output of turbine is usually bigger than the nominal output of feed pump, therefore the nominal output of steam turbine has larger allowance, generally
20% or more.In addition, in power station, the steam exhaust temperature of steam turbine is higher, generally accesses condenser, but feed pump turbine steam exhaust
Pressure is generally greater than condenser pressure, when actual motion, is manufactured and designed by feed pump turbine and mounting process level limit, spy
When not being that feed pump runnability is poor, on the one hand this difference bigger causes the unrestrained in vain of feed pump turbine exhaust steam residual heat
Take, on the other hand also make condenser duty higher, influence unit vacuum, unit net coal consumption rate increases.This sub-load allowance
It cannot such as be made full use of with exhaust steam residual heat, equipment and energy utilization rate can be caused low, deficiency in economic performance.Therefore, how to recycle again
It is that those skilled in the art need urgently to solve the problems, such as using this sub-load allowance and exhaust steam residual heat.
As Chinese patent Authorization Notice No. CN204002945U discloses a kind of feed pump small turbine Driven by Coaxial power generation dress
It sets.Described device includes：Feed pump, small turbine, constant rotational speed output gear case and generator；The feed pump and described small
Steam turbine is connected；The input terminal of the constant rotational speed output gear case is connected with the small turbine；The generator connects
Connect the output end of the constant rotational speed output gear case.The feed pump small turbine Driven by Coaxial power generator, can realize pair
Small turbine extra margin (load) efficiently uses, and can effectively avoid during small turbine drives feed pump
Caused by load waste the problem of.Shortcoming is that the exhaust steam residual heat of steam turbine is not utilized effectively.
For another example Chinese patent Authorization Notice No. CN206160094U discloses a kind of feed pump turbine exhaust steam residual heat utilization
System, including steam jet ejector, intermediate pressure cylinder, low-pressure heater and forward type heat exchangers for district heating, the steam injection pressure
The first entrance of contracting device is connected with feed pump turbine, the row of the second entrance and medium pressure cylinder of the steam jet ejector
Vapour end is connected, and another exhaust steam end of medium pressure cylinder is connected with heat exchangers for district heating shell-side, the outlet of the steam jet ejector
It is connected with the shell-side of forward type heat exchangers for district heating, the outlet of the steam jet ejector is also connected with low-pressure heater, described
Steam jet ejector aspirates the steam exhaust of feed pump turbine using the part steam discharge steam extraction of intermediate pressure cylinder as driving vapour source, will
The relatively low feed pump turbine steam exhaust of the relatively high intermediate pressure cylinder steam discharge of temperature, pressure and temperature, pressure is into trip temperature, pressure
Power matches, and the steam after matching is used for low-pressure heater and forward type heat exchangers for district heating.Shortcoming is exhaust steam residual heat
Utilization rate is not high, and the load margin of steam turbine is not utilized effectively.
In addition, boiler air preheater enters the combustion air in stove using the smoke discharging residual heat preheating of boiler, it can not only
Improve the thermal efficiency of boiler, moreover it is possible to mitigate the pollution to environment.SO is generated after sulphur content burning in fuel2And SO3, and and flue gas
In steam interaction, generate sulfuric acid vapor.When heated surface at the end of boiler wall temperature is less than flue gas acid dew point, just moisture condensation cohesion
In on the wall surface, since liquid sulfuric acid corrosivity is strong, the metal erosion of low temperature heating surface, frequently referred to boiler low-temperature heating surface are caused
Corrosion.Boiler is easiest to along the final stage air preheater of flue gas flow direction by low-temperature corrosion.While low-temperature corrosion occurs,
Incident is exactly the dust stratification of air preheater, they mutually promote, and forms vicious circle, destroys the normal operation of boiler.
The low-temperature corrosion of heated surface at the end of boiler influences station boiler economy and normal work very big, it is necessary to take measures to prevent low
Temperature corrosion and dust stratification.The common approach is that adding warm pocket, being heated using steam, shortcoming is waste vast resources,
Increase energy consumption.
Invention content
A kind of reasonable for structure the purpose of the present invention is overcoming the deficiencies of the prior art and provide, energy utilization rate is high, safety collar
The double of guarantor drag electric pump back pressure turbine comprehensive utilization device and its method.
To achieve the above object, the technical solution adopted by the present invention is：A kind of pair is dragged electric pump back pressure turbine to comprehensively utilize
Device, including feed pump, back pressure turbine, timing gear roller box, generator, warm pocket, pressure fan, air preheater, boiler, cloth bag remove
Dirt device, air-introduced machine, low low-level (stack-gas) economizer, oxygen-eliminating device, desulfurizing tower, chimney, the first output shaft of the back pressure turbine with it is described
The input shaft of feed pump is connected, and the second output shaft of the back pressure turbine is connected with the input shaft of the timing gear roller box, institute
The output shaft for stating timing gear roller box is connected with the input shaft of the generator, the steam drain of the back pressure turbine and the warm sky
The steam inlet of device is connected, and the water outlet of the warm pocket is connected with the desalination water inlet of the low low-level (stack-gas) economizer, described low
The desalination water out of low-level (stack-gas) economizer is connect with the desalination water inlet of the oxygen-eliminating device, the desalination water out of the oxygen-eliminating device and institute
The desalination water inlet for stating feed pump is connected, and the desalination water out of the feed pump is connect with the desalination water inlet of the boiler, institute
The air outlet for stating pressure fan is connected with the air inlet of the warm pocket, the air inlet of the air outlet and the air preheater of the warm pocket
Mouth is connected, and the air outlet of the air preheater is connected with the air inlet of the boiler, and the exhaust pass of the boiler and the sky are pre-
The gas inlet of device connects, and the exhanst gas outlet of the air preheater is connected with the gas inlet of the bag filter, the cloth bag
The exhanst gas outlet of deduster is connected with the import of the air-introduced machine, the cigarette of the outlet and the low low-level (stack-gas) economizer of the air-introduced machine
Gas import is connected, and the exhanst gas outlet of the low low-level (stack-gas) economizer is connected with the import of the desulfurizing tower, the outlet of the desulfurizing tower
It is connect with the import of the chimney.
As the preferred embodiment of the present invention, the back pressure turbine is additionally provided with steam inlet pipe, the steam into
It is provided with into steam control valve on mouth pipe, to accurately control steam flow.
As the preferred embodiment of the present invention, the low low-level (stack-gas) economizer preferably includes at least one set of U heat exchange.
In order to reduce low-temperature corrosion and equipment attrition, device security is improved, the preferred implementation as the present invention
Mode, the U heat exchange material is preferably PTFE.
In order to reduce the resistance flowed to boiler smoke when warm air system maintenance, energy conservation and consumption reduction effects are further increased, are made
For the preferred embodiment of the present invention, the warm pocket is preferably that drawable type warms up pocket.
The present invention also provides above-mentioned double methods for dragging electric pump back pressure turbine device to comprehensively utilize, and are discharged from main steam turbine
Low-pressure steam is done work by entering back pressure turbine after adjusting flow into steam control valve, and back pressure turbine drives feed pump on one side,
Electrical power generators are driven by timing gear roller box simultaneously, the steam exhaust being discharged from back pressure turbine, which enters, warms up pocket, and from pressure fan
Demineralized water, which is condensed into, after the cold air heat exchange come enters low low-level (stack-gas) economizer, the heat come in low low-level (stack-gas) economizer and from air-introduced machine
Enter oxygen-eliminating device deoxygenation after flue gas heat exchange heating, the demineralized water after deoxygenation enters the water supply system of boiler after feed pump pressurizes；
The cold air come from pressure fan enters air preheater in warm pocket after heat exchange heats up, and is further carried through heat smoke in air preheater
Enter boiler after high-temperature；The heat smoke of boiler discharge cools down successively through air preheater, after bag filter dedusting, in air-introduced machine
Traction is lower to be entered low low-level (stack-gas) economizer and enters desulfurizing tower desulfurization, the cigarette after desulfurization after the heat exchange cooling of the demineralized water of warm pocket
Gas is through chimney qualified discharge.
As the preferred embodiment of the present invention, the flow preferably 20 of the low-pressure steam into back pressure turbine~
40t/h, temperature are preferably 400~450 DEG C, and pressure is preferably 3.0~4.0MPa.
As the preferred embodiment of the present invention, the flow of the cold air come from pressure fan is preferably 250000~
350000m3/ h, temperature are preferably -5~30 DEG C.
The double of the present invention drag electric pump back pressure turbine comprehensive utilization device, in order to overcome warm pocket to improve boiler smoke row
Smoke temperature degree reduces the deficiency of generatine set heat efficiency, and low low-level (stack-gas) economizer is arranged between air-introduced machine and desulfurizing tower, and low low temperature saves coal
The application of device, which is not only utilized to heat by warm pocket, to be condensed after air hydrophobic, and the boiler smoke temperature that warm pocket is raised is notable
It reduces, Mist heat recovering, improves desalination coolant-temperature gage, enhance boiler overall utilization rate.The present invention overcomes low low-level (stack-gas) economizers
By boiler smoke temperature drop it is low after, the problem of leading to desulfurizing tower disrupted water balance, uses stream so as to avoid low low-level (stack-gas) economizer is reduced
The defect of amount.The cooperation for warming up pocket and low low-level (stack-gas) economizer in the present invention not only solves the problems, such as high fume temperature, also improves
The utilization ratio of low low-level (stack-gas) economizer.The double of the present invention drag electric pump back pressure turbine comprehensive utilization device, greatly reduce energy
Source is lost, and improves equipment and energy utilization rate, increases economic benefit.
Double acting abilities for dragging electric pump back pressure turbine comprehensive utilization device that can give full play to back pressure turbine of the present invention,
Its steam discharge can be used for boiler air preheater and warm pocket air source, not only improve utilization rate of equipment and installations, but also solve air preheater low-temperature corrosion
Block up the problem of ash.
Compared with prior art, the invention has the advantages that：
1, the present invention improves the utilization ratio of back pressure turbine to greatest extent, not only using back pressure turbine it is double drag to
Water pump and generator, and solve the stifled ash of boiler air preheater low-temperature corrosion using its steam discharge and winter boiler inlet temperature is low asks
Topic, improves boiler thermal efficiency, boiler inlet temperature improves 40 DEG C or more.
2, the present invention is used using the low low-level (stack-gas) economizer of pocket collocation is warmed up, and is not only utilized after heating air by warm pocket
The demineralized water of condensation, but the boiler smoke temperature that warm pocket is raised significantly reduces, and Mist heat recovering improves desalination coolant-temperature gage, increases
Strong boiler overall utilization rate, boiler smoke temperature reduce 42~46 DEG C, and desalination coolant-temperature gage reaches 93 DEG C or more.
3, PTFE can be used in the U heat exchange material of the low low-level (stack-gas) economizer used in the present invention, reduces low-temperature corrosion
And equipment attrition, improve device security.
4, the present invention overcomes the prior art warm up pocket because it is hydrophobic into oxygen-eliminating device due to add the deficiencies of the equipment such as drainage pump,
It is also overcomed simultaneously because drain tank is to reduce the cavitation phenomenons of hydrophobic pump intake also to keep certain height and to generate pressure head, and needle
Carrying out frequent start-stop to drainage pump to the limit of drain tank height leads to the deficiency for controlling the high failure rate of cumbersome and drainage pump, this
The low low-level (stack-gas) economizer of the hydrophobic entrance of warm pocket is saved the equipment such as drainage pump, has saved energy consumption by invention, is improved safe and reliable
Property.
5, the present invention warms up pocket using drawable type, and when warm air system overhauls, drawable type warms up pocket and can reduce to boiler smoke
Air-flow dynamic resistance has apparent energy conservation and consumption reduction effects.
Description of the drawings
Fig. 1 is double flow diagrams for dragging electric pump back pressure turbine comprehensive utilization device of the present invention.
In figure, feed pump 1, back pressure turbine 2, timing gear roller box 3, generator 4, warm pocket 5, air preheater 6, boiler 7, cloth
Bag dust collector 8, air-introduced machine 9, low low-level (stack-gas) economizer 10, desulfurizing tower 11, chimney 12, pressure fan 13, oxygen-eliminating device 14, into steam control valve
15。
Specific implementation mode
As shown in Figure 1, the double of the present invention drag electric pump back pressure turbine comprehensive utilization device, including feed pump 1, back pressure steamer
It is machine 2, timing gear roller box 3, generator 4, warm pocket 5, pressure fan 13, air preheater 6, boiler 7, bag filter 8, air-introduced machine 9, low
Low-level (stack-gas) economizer 10, oxygen-eliminating device 14, desulfurizing tower 11, chimney 12, the input of the first output shaft and feed pump 1 of back pressure turbine 2
Axis be connected, the second output shaft of back pressure turbine 2 is connected with the input shaft of timing gear roller box 3, the output shaft of timing gear roller box 3 and
The input shaft of generator 4 is connected, and the steam drain of back pressure turbine 2 is connected with the steam inlet of warm pocket 5, warms up the water outlet of pocket 5
Mouth is connected with the desalination water inlet of low low-level (stack-gas) economizer 10, the desalination of the desalination water out and oxygen-eliminating device 14 of low low-level (stack-gas) economizer 10
Water inlet connects, and the desalination water out of oxygen-eliminating device 14 is connected with the desalination water inlet of feed pump 2, the desalination water out of feed pump 2
It is connect with the desalination water inlet of boiler 7, the air outlet of pressure fan 13 is connected with the air inlet of warm pocket 5, warms up the air outlet of pocket 5
It is connected with the air inlet of air preheater 6, the air outlet of air preheater 6 is connected with the air inlet of boiler 7, exhaust pass and the sky of boiler 7
The gas inlet of pre- device 6 connects, and the exhanst gas outlet of air preheater 6 is connected with the gas inlet of bag filter 8, bag filter 8
Exhanst gas outlet be connected with the import of air-introduced machine 9, the outlet of air-introduced machine 9 is connected with the gas inlet of low low-level (stack-gas) economizer 10, low
The exhanst gas outlet of low-level (stack-gas) economizer 10 is connected with the import of desulfurizing tower 11, and the outlet of desulfurizing tower 11 is connect with the import of chimney 12.
Back pressure turbine 2 is additionally provided with steam inlet pipe, is provided on steam inlet pipe into steam control valve 15, to accurately control steam stream
Amount.
The double of the present invention drag the electric pump back pressure turbine comprehensive utilization device workflow to be：The low pressure being discharged from main steam turbine
Steam is done work by entering back pressure turbine 2 after adjusting flow into steam control valve 15, and back pressure turbine 2 drives feed pump 1 on one side,
Generator 4 is driven to generate electricity by timing gear roller box 3 simultaneously, the steam exhaust being discharged from back pressure turbine 2, which enters, warms up pocket 5, and from sending
Condense into demineralized water after the cold air heat exchange of wind turbine 13 and enter low low-level (stack-gas) economizer 10, in low low-level (stack-gas) economizer 10 with from drawing
Enter 14 deoxygenation of oxygen-eliminating device after the heat smoke heat exchange heating of wind turbine 9, the demineralized water after deoxygenation enters pot after the pressurization of feed pump 1
The water supply system of stove 7；Enter air preheater 6 after exchanging heat and heating up in warm pocket 5 from the cold air of pressure fan 13, in air preheater
Enter boiler 7 after heat smoke further increases temperature in 6 and participates in burning；The heat smoke that boiler 7 is discharged after burning is successively through sky
The cooling of pre- device 6, after 8 dedusting of bag filter, under the traction of air-introduced machine 9 into low low-level (stack-gas) economizer 10 with from warm pocket 5
Condensed water heat exchange cooling after enter 11 desulfurization of desulfurizing tower, the flue gas after desulfurization is through 12 qualified discharge of chimney.
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.But the present invention simultaneously not only limits
In the embodiment described.
Embodiment 1
A kind of pair is dragged electric pump back pressure turbine comprehensive utilization device, including feed pump 1, back pressure turbine 2, timing gear roller box
3, generator 4, warm pocket 5 (drawable type), pressure fan 13, air preheater 6, boiler 7, bag filter 8, air-introduced machine 9, low temperature save
Coal device 10 (including one group of material is the U heat exchange of PTFE), oxygen-eliminating device 14, desulfurizing tower 11, chimney 12, back pressure turbine 2
First output shaft is connected with the input shaft of feed pump 1, the input shaft of the second output shaft and timing gear roller box 3 of back pressure turbine 2
It is connected, the output shaft of timing gear roller box 3 is connected with the input shaft of generator 4, the steam drain of back pressure turbine 2 and warm pocket 5
Steam inlet is connected, and the water outlet of warm pocket 5 is connected with the desalination water inlet of low low-level (stack-gas) economizer 10, low low-level (stack-gas) economizer 10
Desalination water out is connect with the desalination water inlet of oxygen-eliminating device 14, the desalination water out of oxygen-eliminating device 14 and the demineralized water of feed pump 2 into
Mouth is connected, and the desalination water out of feed pump 2 is connect with the desalination water inlet of boiler 7, the air outlet of pressure fan 13 and warm pocket 5
Air inlet is connected, and the air outlet of warm pocket 5 is connected with the air inlet of air preheater 6, the air inlet of the air outlet and boiler 7 of air preheater 6
Mouth is connected, and the exhaust pass of boiler 7 is connect with the gas inlet of air preheater 6, exhanst gas outlet and the bag filter 8 of air preheater 6
Gas inlet be connected, the exhanst gas outlet of bag filter 8 is connected with the import of air-introduced machine 9, the outlet of air-introduced machine 9 and low temperature
The gas inlet of economizer 10 is connected, and the exhanst gas outlet of low low-level (stack-gas) economizer 10 is connected with the import of desulfurizing tower 11, desulfurizing tower 11
Outlet connect with the import of chimney 12.Back pressure turbine 2 is additionally provided with steam inlet pipe, is provided on steam inlet pipe into vapour
Regulating valve 15, to accurately control steam flow.
Operating parameter：Flow into the low-pressure steam of back pressure turbine is 30t/h, and temperature is 410 DEG C, and pressure is
3.35Mpa；The flow of the cold air come from pressure fan is 320000m3/ h, temperature are 15 DEG C.
Operational effect：Temperature into the cold air of warm pocket is 15 DEG C, and the air themperature for going out warm pocket is 55 DEG C；Into
The temperature of the heat smoke of low low-level (stack-gas) economizer is 145 DEG C, and the temperature for going out the heat smoke of low low-level (stack-gas) economizer is 100 DEG C；Into low
The temperature of the demineralized water of low-level (stack-gas) economizer is 60 DEG C, and the temperature for going out the demineralized water of low low-level (stack-gas) economizer is 97 DEG C；Electrical power generators
Amount is 200kw.Air preheater does not occur low-temperature corrosion clogging phenomenon.
Embodiment 2
A kind of pair is dragged electric pump back pressure turbine comprehensive utilization device, including feed pump 1, back pressure turbine 2, timing gear roller box
3, generator 4, warm pocket 5 (drawable type), pressure fan 13, air preheater 6, boiler 7, bag filter 8, air-introduced machine 9, low temperature save
Coal device 10 (including three groups of materials are the U heat exchange of PTFE), oxygen-eliminating device 14, desulfurizing tower 11, chimney 12, back pressure turbine 2
First output shaft is connected with the input shaft of feed pump 1, the input shaft of the second output shaft and timing gear roller box 3 of back pressure turbine 2
It is connected, the output shaft of timing gear roller box 3 is connected with the input shaft of generator 4, the steam drain of back pressure turbine 2 and warm pocket 5
Steam inlet is connected, and the water outlet of warm pocket 5 is connected with the desalination water inlet of low low-level (stack-gas) economizer 10, low low-level (stack-gas) economizer 10
Desalination water out is connect with the desalination water inlet of oxygen-eliminating device 14, the desalination water out of oxygen-eliminating device 14 and the demineralized water of feed pump 2 into
Mouth is connected, and the desalination water out of feed pump 2 is connect with the desalination water inlet of boiler 7, the air outlet of pressure fan 13 and warm pocket 5
Air inlet is connected, and the air outlet of warm pocket 5 is connected with the air inlet of air preheater 6, the air inlet of the air outlet and boiler 7 of air preheater 6
Mouth is connected, and the exhaust pass of boiler 7 is connect with the gas inlet of air preheater 6, exhanst gas outlet and the bag filter 8 of air preheater 6
Gas inlet be connected, the exhanst gas outlet of bag filter 8 is connected with the import of air-introduced machine 9, the outlet of air-introduced machine 9 and low temperature
The gas inlet of economizer 10 is connected, and the exhanst gas outlet of low low-level (stack-gas) economizer 10 is connected with the import of desulfurizing tower 11, desulfurizing tower 11
Outlet connect with the import of chimney 12.Back pressure turbine 2 is additionally provided with steam inlet pipe, is provided on steam inlet pipe into vapour
Regulating valve 15, to accurately control steam flow.
Operating parameter：Flow into the low-pressure steam of back pressure turbine is 28t/h, and temperature is 414 DEG C, and pressure is
3.5MPa；The flow of the cold air come from pressure fan is 300000m3/ h, temperature are 10 DEG C.
Operational effect：Temperature into the cold air of warm pocket is 10 DEG C, and the air themperature for going out warm pocket is 53 DEG C；Into
The temperature of the heat smoke of low low-level (stack-gas) economizer is 143 DEG C, and the temperature for going out the heat smoke of low low-level (stack-gas) economizer is 100 DEG C；Into low
The temperature of the demineralized water of low-level (stack-gas) economizer is 58 DEG C, and the temperature for going out the demineralized water of low low-level (stack-gas) economizer is 95 DEG C；Electrical power generators
Amount is 210kw.Air preheater does not occur low-temperature corrosion clogging phenomenon.
Embodiment 3
A kind of pair is dragged electric pump back pressure turbine comprehensive utilization device, including feed pump 1, back pressure turbine 2, timing gear roller box
3, generator 4, warm pocket 5 (drawable type), pressure fan 13, air preheater 6, boiler 7, bag filter 8, air-introduced machine 9, low temperature save
Coal device 10 (including four groups of materials are the U heat exchange of PTFE), oxygen-eliminating device 14, desulfurizing tower 11, chimney 12, back pressure turbine 2
First output shaft is connected with the input shaft of feed pump 1, the input shaft of the second output shaft and timing gear roller box 3 of back pressure turbine 2
It is connected, the output shaft of timing gear roller box 3 is connected with the input shaft of generator 4, the steam drain of back pressure turbine 2 and warm pocket 5
Steam inlet is connected, and the water outlet of warm pocket 5 is connected with the desalination water inlet of low low-level (stack-gas) economizer 10, low low-level (stack-gas) economizer 10
Desalination water out is connect with the desalination water inlet of oxygen-eliminating device 14, the desalination water out of oxygen-eliminating device 14 and the demineralized water of feed pump 2 into
Mouth is connected, and the desalination water out of feed pump 2 is connect with the desalination water inlet of boiler 7, the air outlet of pressure fan 13 and warm pocket 5
Air inlet is connected, and the air outlet of warm pocket 5 is connected with the air inlet of air preheater 6, the air inlet of the air outlet and boiler 7 of air preheater 6
Mouth is connected, and the exhaust pass of boiler 7 is connect with the gas inlet of air preheater 6, exhanst gas outlet and the bag filter 8 of air preheater 6
Gas inlet be connected, the exhanst gas outlet of bag filter 8 is connected with the import of air-introduced machine 9, the outlet of air-introduced machine 9 and low temperature
The gas inlet of economizer 10 is connected, and the exhanst gas outlet of low low-level (stack-gas) economizer 10 is connected with the import of desulfurizing tower 11, desulfurizing tower 11
Outlet connect with the import of chimney 12.Back pressure turbine 2 is additionally provided with steam inlet pipe, is provided on steam inlet pipe into vapour
Regulating valve 15, to accurately control steam flow.
Operating parameter：Flow into the low-pressure steam of back pressure turbine is 25t/h, and temperature is 414 DEG C, and pressure is
3.5MPa；The flow of the cold air come from pressure fan is 280000m3/ h, temperature are 5 DEG C.
Operational effect：Temperature into the cold air of warm pocket is 5 DEG C, and the air themperature for going out warm pocket is 50 DEG C；Into
The temperature of the heat smoke of low low-level (stack-gas) economizer is 142 DEG C, and the temperature for going out the heat smoke of low low-level (stack-gas) economizer is 100 DEG C；Into low
The temperature of the demineralized water of low-level (stack-gas) economizer is 55 DEG C, and the temperature for going out the demineralized water of low low-level (stack-gas) economizer is 93 DEG C；Electrical power generators
Amount is 270kw.Air preheater does not occur low-temperature corrosion clogging phenomenon.
Embodiment 4
A kind of pair is dragged electric pump back pressure turbine comprehensive utilization device, including feed pump 1, back pressure turbine 2, timing gear roller box
3, generator 4, warm pocket 5 (drawable type), pressure fan 13, air preheater 6, boiler 7, bag filter 8, air-introduced machine 9, low temperature save
Coal device 10 (including five groups of materials are the U heat exchange of PTFE), oxygen-eliminating device 14, desulfurizing tower 11, chimney 12, back pressure turbine 2
First output shaft is connected with the input shaft of feed pump 1, the input shaft of the second output shaft and timing gear roller box 3 of back pressure turbine 2
It is connected, the output shaft of timing gear roller box 3 is connected with the input shaft of generator 4, the steam drain of back pressure turbine 2 and warm pocket 5
Steam inlet is connected, and the water outlet of warm pocket 5 is connected with the desalination water inlet of low low-level (stack-gas) economizer 10, low low-level (stack-gas) economizer 10
Desalination water out is connect with the desalination water inlet of oxygen-eliminating device 14, the desalination water out of oxygen-eliminating device 14 and the demineralized water of feed pump 2 into
Mouth is connected, and the desalination water out of feed pump 2 is connect with the desalination water inlet of boiler 7, the air outlet of pressure fan 13 and warm pocket 5
Air inlet is connected, and the air outlet of warm pocket 5 is connected with the air inlet of air preheater 6, the air inlet of the air outlet and boiler 7 of air preheater 6
Mouth is connected, and the exhaust pass of boiler 7 is connect with the gas inlet of air preheater 6, exhanst gas outlet and the bag filter 8 of air preheater 6
Gas inlet be connected, the exhanst gas outlet of bag filter 8 is connected with the import of air-introduced machine 9, the outlet of air-introduced machine 9 and low temperature
The gas inlet of economizer 10 is connected, and the exhanst gas outlet of low low-level (stack-gas) economizer 10 is connected with the import of desulfurizing tower 11, desulfurizing tower 11
Outlet connect with the import of chimney 12.Back pressure turbine 2 is additionally provided with steam inlet pipe, is provided on steam inlet pipe into vapour
Regulating valve 15, to accurately control steam flow.
Operating parameter：Flow into the low-pressure steam of back pressure turbine is 32t/h, and temperature is 420 DEG C, and pressure is
4.0MPa；The flow of the cold air come from pressure fan is 320000m3/ h, temperature are 15 DEG C.
Operational effect：Temperature into the cold air of warm pocket is 15 DEG C, and the air themperature for going out warm pocket is 57 DEG C；Into
The temperature of the heat smoke of low low-level (stack-gas) economizer is 146 DEG C, and the temperature for going out the heat smoke of low low-level (stack-gas) economizer is 100 DEG C；Into low
The temperature of the demineralized water of low-level (stack-gas) economizer is 50 DEG C, and the temperature for going out the demineralized water of low low-level (stack-gas) economizer is 96 DEG C；Electrical power generators
Amount is 170kw.Air preheater does not occur low-temperature corrosion clogging phenomenon.
Claims (8)
1. a kind of pair is dragged electric pump back pressure turbine comprehensive utilization device, including feed pump, back pressure turbine, timing gear roller box, hair
Motor, warm pocket, pressure fan, air preheater, boiler, bag filter, air-introduced machine, low low-level (stack-gas) economizer, oxygen-eliminating device, desulfurizing tower,
Chimney, which is characterized in that the first output shaft of the back pressure turbine is connected with the input shaft of the feed pump, the back pressure steam
Second output shaft of turbine is connected with the input shaft of the timing gear roller box, the output shaft of the timing gear roller box and the power generation
The input shaft of machine is connected, and the steam drain of the back pressure turbine is connected with the steam inlet of the warm pocket, the warm pocket
Water outlet is connected with the desalination water inlet of the low low-level (stack-gas) economizer, and the desalination water out of the low low-level (stack-gas) economizer is removed with described
The desalination water inlet of oxygen device connects, and the desalination water out of the oxygen-eliminating device is connected with the desalination water inlet of the feed pump, described
The desalination water out of feed pump is connect with the desalination water inlet of the boiler, the air outlet of the pressure fan and the warm pocket
Air inlet is connected, and the air outlet of the warm pocket is connected with the air inlet of the air preheater, the air outlet of the air preheater and institute
The air inlet for stating boiler is connected, and the exhaust pass of the boiler is connect with the gas inlet of the air preheater, the air preheater
Exhanst gas outlet is connected with the gas inlet of the bag filter, the exhanst gas outlet of the bag filter and the air-introduced machine
Import is connected, and the outlet of the air-introduced machine is connected with the gas inlet of the low low-level (stack-gas) economizer, the low low-level (stack-gas) economizer
Exhanst gas outlet is connected with the import of the desulfurizing tower, and the outlet of the desulfurizing tower is connect with the import of the chimney.
2. according to claim 1 pair is dragged electric pump back pressure turbine comprehensive utilization device, which is characterized in that the back pressure steam
Turbine is additionally provided with steam inlet pipe, is provided with into steam control valve on the steam inlet pipe.
3. according to claim 1 pair is dragged electric pump back pressure turbine comprehensive utilization device, which is characterized in that the low temperature
Economizer includes at least one set of U heat exchange.
4. double electric pump back pressure turbine comprehensive utilization device is dragged according to claim 3, which is characterized in that described U-shaped to change
Heat pipe material is PTFE.
5. according to claim 1 pair is dragged electric pump back pressure turbine comprehensive utilization device, which is characterized in that the warm pocket
Pocket is warmed up for drawable type.
6. a kind of pair is dragged electric pump back pressure turbine method of comprehensive utilization, which is characterized in that the low-pressure steam being discharged from main steam turbine
It is done work by entering back pressure turbine after adjusting flow into steam control valve, back pressure turbine drives feed pump, passes through simultaneously on one side
Timing gear roller box drive electrical power generators, and the steam exhaust being discharged from back pressure turbine, which enters, warms up pocket, with the cold sky come from pressure fan
Demineralized water is condensed into after gas heat exchange and enters low low-level (stack-gas) economizer, is exchanged heat with the heat smoke come from air-introduced machine in low low-level (stack-gas) economizer
Enter oxygen-eliminating device deoxygenation after heating, the demineralized water after deoxygenation enters the water supply system of boiler after feed pump pressurizes；From pressure fan
The cold air come enters air preheater in warm pocket after heat exchange heats up, in air preheater after heat smoke further increases temperature
Into boiler；The heat smoke of boiler discharge successively through air preheater cooling, after bag filter dedusting, under the traction of air-introduced machine into
Enter low low-level (stack-gas) economizer and enter desulfurizing tower desulfurization with after the heat exchange cooling of the demineralized water of warm pocket, the flue gas after desulfurization is through chimney
Qualified discharge.
7. according to claim 6 pair is dragged electric pump back pressure turbine method of comprehensive utilization, which is characterized in that described to enter the back of the body
It is 20~40t/h to press the flow of the low-pressure steam of steam turbine, and temperature is 400~450 DEG C, and pressure is 3.0~4.0MPa.
8. according to claim 6 pair is dragged electric pump back pressure turbine method of comprehensive utilization, which is characterized in that described from air-supply
The flow for the cold air that machine comes is 250000~350000m3/ h, temperature are -5~30 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113107878A (en) * | 2021-04-08 | 2021-07-13 | 西安热工研究院有限公司 | Double-fed system-based primary frequency modulation electric induced draft fan system of wet cooling unit |
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Denomination of invention: A comprehensive utilization device and method for a back pressure steam turbine with a dual drag electric pump Granted publication date: 20230915 Pledgee: Juhua Group Finance Co.,Ltd. Pledgor: ZHEJIANG JUHUA THERMAL POWER CO.,LTD. Registration number: Y2023980075763 |