CN108534126A - It is a kind of with pressure matcher machine stove waste heat coupling utilize system - Google Patents
It is a kind of with pressure matcher machine stove waste heat coupling utilize system Download PDFInfo
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- CN108534126A CN108534126A CN201810247821.3A CN201810247821A CN108534126A CN 108534126 A CN108534126 A CN 108534126A CN 201810247821 A CN201810247821 A CN 201810247821A CN 108534126 A CN108534126 A CN 108534126A
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- pressure
- steam
- low
- low pressure
- waste heat
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- 239000002918 waste heat Substances 0.000 title claims abstract description 26
- 230000008878 coupling Effects 0.000 title claims abstract description 22
- 238000010168 coupling process Methods 0.000 title claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000000605 extraction Methods 0.000 claims abstract description 20
- 238000005086 pumping Methods 0.000 claims abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 8
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000000284 extract Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 206010009866 Cold sweat Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003809 water extraction 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
- F22D1/36—Water and air preheating systems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention relates to a kind of, and the machine stove waste heat coupling with pressure matcher utilizes system, including turbine low pressure cylinder, pressure matcher, steam air heater, air preheater and low-level (stack-gas) economizer；Pressure matcher input terminal is connect by the steam discharge extraction line of low pressure (LP) cylinder pump-line and connection low pressure (LP) cylinder discharge duct with turbine low pressure cylinder, for under the driving that steam turbine low-pressure is evacuated, steam turbine low-pressure exhaust is extracted, steam of the pressure between low-pressure pumping steam and low pressure steam discharge is generated；The input terminal of steam air heater is connect by jet chimney with pressure matcher output end, output end is connect with air preheater, for being preheated to the cold wind, the secondary cold wind that enter steam air heater by steam, and a cold wind, the secondary cold wind after preheating are exported to air preheater；Air preheater is connect with low-level (stack-gas) economizer, and low-level (stack-gas) economizer is connected with circulating water inlet road and circulating water outlet pipe road.The present invention solves the problems, such as Steam Turbine exhaust steam waste heat utilization.
Description
Technical field
The invention belongs to thermal power generating technology fields more particularly to a kind of machine stove waste heat with pressure matcher to couple and utilize
System.
Background technology
For fired power generating unit, the energy that turbine discharge is taken away is huge, and the exhaust temperature of wet type cooling unit is up to 30-50
DEG C, the exhaust temperature of air cooling unit is up to 60-70 DEG C.Effectively recycling steam turbine exhaust heat is a problem, main to show
At two aspects：First, the energy level grade of turbine discharge is not high, the applicable space very little of low temperature steam discharge；Second is that steam turbine is arranged
The specific volume of vapour is very big, if directly exchanging heat using steam discharge, needs to design prodigious heat exchanger and associated conduit, increases equipment and throw
Money and operating cost, make energy saving profit have a greatly reduced quality.
Invention content
The object of the present invention is to provide a kind of, and the machine stove waste heat coupling with pressure matcher utilizes system, to solve steam turbine
Group exhaust steam waste heat utilization problem.
The machine stove waste heat coupling that the present invention provides a kind of with pressure matcher utilizes system, including turbine low pressure cylinder,
Pressure matcher, steam air heater, air preheater and low-level (stack-gas) economizer；
Pressure matcher input terminal passes through low pressure (LP) cylinder pump-line and the steam discharge extraction line of connection low pressure (LP) cylinder discharge duct
It is connect with turbine low pressure cylinder, under the driving for the steam turbine low-pressure pumping that low pressure (LP) cylinder pump-line exports, passing through steam discharge
Extraction line extracts steam turbine low-pressure exhaust, generates steam of the pressure between low-pressure pumping steam and low pressure steam discharge；
The input terminal of steam air heater is connect by jet chimney with pressure matcher output end, the output end and air of steam air heater
Preheater connects；The steam that steam air heater is used to export by jet chimney to a cold wind of entrance steam air heater, secondary cold wind into
Row preheating, and a cold wind, the secondary cold wind after preheating are exported to air preheater, absorb flue gas heat；
Air preheater is connect with low-level (stack-gas) economizer, and low-level (stack-gas) economizer is connected with circulating water inlet road and recirculated water water outlet
Pipeline.
Further, low pressure (LP) cylinder pump-line includes the first low pressure (LP) cylinder pump-line and the second low pressure (LP) cylinder pump-line.
Further, the first low pressure (LP) cylinder pump-line and the second low pressure (LP) cylinder pump-line are respectively equipped with the of adjustable aperture
One valve and the second valve.
Further, steam discharge extraction line is equipped with the third valve of adjustable aperture.
Further, circulating water inlet road is equipped with the 4th valve of adjustable aperture.
Further, which further includes the section for calculating machine stove waste heat coupling using system unit amount of energy saving index
Energy indexes computing module, the first valve, the second valve, third valve and the 4th valve aperture based on the unit for calculating gained
Energy saving figureofmerit and the setting of unit whole economic efficiency maximization principle.
According to the above aspect of the present invention, utilizing system by the machine stove waste heat coupling with pressure matcher, following technology effect is produced
Fruit：
1, the specific volume of turbine discharge is reduced using pressure matcher, makes to be difficult the turbine discharge directly utilized originally
Waste heat is recycled.
2, recycle unit exhausted spare heat can a part of boiler smoke of offset use so that in low-level (stack-gas) economizer system
Flue gas thermal discharge increases, and condensed water caloric receptivity increases, and the steam extraction usage amount of heat regenerative system is reduced.
3, for conventional system, atmospheric temperature is lower, heats the defeated of the vapour-gas vapour-gas steam air heater needs of cold wind
It is more to enter heat, extracted steam from turbine consumption is bigger, and the decline of the economic benefit of unit is more apparent.And for the present invention, outside
Boundary's steam temperature is lower, and the heat transfer temperature difference between steam turbine steam discharge and cold wind is bigger, and heat exchange efficiency is higher, and the waste heat income of machine stove coupling is got over
Greatly.
4, the cooling due to part turbine discharge in vapour-gas vapour-gas steam air heater so that original recirculated water is (clammy
Unit) dosage reduction, corresponding water circulating pump power consumption reduction.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the machine stove waste heat coupling with pressure matcher of the present invention using system.
Figure label：
Cold wind of 1-；Bis- cold wind of 2-；3- vapour-gas vapour-gas steam air heaters；4- air preheaters；5- low-level (stack-gas) economizers；6-
To deduster flue gas；7- circulating water inlets road；8- circulating water outlet pipes road；9- turbine low pressure cylinders；10- low pressure (LP) cylinder exhaust pipes
Road；12- pressure matchers；13- jet chimneys；14- drain water pipings；15- the first low pressure (LP) cylinder pump-lines；The second low pressure (LP) cylinders of 16-
Pump-line；17- steam discharge extraction lines.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example is not limited to the scope of the present invention for illustrating the present invention.
Join and present embodiments provides a kind of machine stove waste heat coupling with pressure matcher shown in Fig. 1 and utilize system, including vapour
Turbine low pressure (LP) cylinder 9, pressure matcher 12, vapour-gas vapour-gas steam air heater 3, air preheater 4 and low-level (stack-gas) economizer 5.Pressure match
12 input terminal of device is low with steam turbine by the steam discharge extraction line 17 of low pressure (LP) cylinder pump-line and connection low pressure (LP) cylinder discharge duct 10
Cylinder pressure 9 connects, under the driving for the steam turbine low-pressure pumping that low pressure (LP) cylinder pump-line exports, passing through steam discharge extraction line 17
Steam turbine low-pressure exhaust is extracted, the steam of pressure stability of the pressure between low-pressure pumping steam and low pressure steam discharge is generated.
The input terminal of vapour-gas vapour-gas steam air heater 3 is connect by jet chimney 13 with 12 output end of pressure matcher, vapour-gas
The output end of vapour-gas steam air heater 3 is connect with air preheater 4；Vapour-gas vapour-gas steam air heater 3 by jet chimney 13 for being exported
Steam the cold wind, the secondary cold wind that enter vapour-gas vapour-gas steam air heater 3 are preheated, and will be primary cold after preheating
Wind, secondary cold wind are exported to air preheater 4, absorb flue gas heat.Air preheater 4 is connect with low-level (stack-gas) economizer 5, and low temperature saves
Coal device 5 is connected with circulating water inlet road 7 and circulating water outlet pipe road 8.
Machine stove waste heat coupling provided in this embodiment with pressure matcher utilizes system, is driven using steam turbine low-pressure steam extraction
Dynamic pressure adaptation 12 extracts steam turbine low-pressure steam discharge, generates steam of the pressure between low-pressure pumping steam and steam discharge and enters vapour-
Gas steam air heater 3 preheats cold wind 1 of boiler, secondary cold wind 2, and it is pre- that first and second cold wind after preheating goes successively to air
Hot device 4 absorbs flue gas heat.
Due to the input of turbine discharge heat so that thermal discharge of the flue gas in air preheater 4 is reduced, and flue gas carries
More heats enter 5 heat release of low-level (stack-gas) economizer and intake to recirculated water, and the recirculated water water outlet after heat absorption returns to steam turbine backheat system
System reduces heat regenerative system steam extraction amount, and the steam extraction of saving continues to do work in Steam Turbine, realizes energy cascade utilization, improves machine
Group whole efficiency..
The effect of low-level (stack-gas) economizer 5 is the fume afterheat exported using air preheater 4 in system, is heated from cryogenic temperature condensation
The partial coagulation water that water system (passing through circulating water inlet road 7) extracts, the condensed water after heating pass through circulating water outlet pipe road 8
Steam Turbine Regenerative System is returned to continue to absorb heat.
In the present embodiment, low pressure (LP) cylinder pump-line includes the first low pressure (LP) cylinder pump-line 15 and the second low pressure (LP) cylinder exhaust tube
Road 16 can be such that steam turbine low-pressure is evacuated from different by the first low pressure (LP) cylinder pump-line 15 and the second low pressure (LP) cylinder pump-line 16
Extraction line extracts, and convenient for control and safeguards.
In the present embodiment, the first low pressure (LP) cylinder pump-line 15, the second low pressure (LP) cylinder pump-line 16, steam discharge extraction line 17
And it is equipped with valve on circulating water inlet road 7, it, can basis under different unit loads by the adjustable valve of aperture
The parameters such as extraneous cold wind temperature, turbine discharge temperature and displacement, co- controlling machine stove waste heat coupling utilize system.
In the present embodiment, it is respectively equipped with first on the first low pressure (LP) cylinder pump-line 15 and the second low pressure (LP) cylinder pump-line 16
Valve and the second valve control steam extraction share according to unit different load Operating condition adjustment difference extraction line valve opening, to protect
Demonstrate,prove the safety and economic operation of unit.
In the present embodiment, steam discharge extraction line 17 is equipped with the third valve of adjustable aperture, by adjusting third valve
Aperture, into the displacement of pressure matcher 12, remaining turbine discharge enters the original steam discharge cooling system of unit for control
System.
In the present embodiment, circulating water inlet road 7 is equipped with the 4th valve of adjustable aperture, by adjusting the 4th valve
Aperture control condensed water extraction amount.
In the present embodiment, which further includes utilizing system unit amount of energy saving index for calculating machine stove waste heat coupling
Energy saving figureofmerit computing module, the first valve, the second valve, third valve and the 4th valve aperture based on calculating gained
The energy saving figureofmerit of unit and the setting of unit whole economic efficiency maximization principle.
Energy saving figureofmerit computing module calculates on the basis of the heat economy model based on the entire unit of steam turbine-boiler of foundation
The energy saving figureofmerit of system, and on the basis of unit safety operation, set according to unit whole economic efficiency maximization principle
Machine stove waste heat coupling using the first low pressure (LP) cylinder of system pump-line 15, the second low pressure (LP) cylinder pump-line 16, steam discharge extraction line 17,
The aperture of valve on circulating water inlet road 7 is taken out with controlling, adjusting low-pressure pumping steam dosage, turbine discharge usage amount, condensed water
Taken amount etc..
It should be noted that the present invention is different with the energy-saving effect in air cooling unit in wet type cooling unit.Theoretically steam turbine
Group exhaust temperature is higher, and the energy that steam discharge is contained is bigger, and energy saving of system effect is utilized using the machine stove waste heat coupling of the present invention
It is more apparent.Meanwhile it being generally the cold north of arid using the region of air cooling unit, first and second air temperature in winter is very low,
Heat transfer temperature difference is big in vapour-gas vapour-gas steam air heater, and heat exchanger using effect is apparent.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of machine stove waste heat coupling with pressure matcher utilizes system, which is characterized in that including turbine low pressure cylinder, pressure
Adaptation, steam air heater, air preheater and low-level (stack-gas) economizer；
The pressure matcher input terminal passes through low pressure (LP) cylinder pump-line and the steam discharge extraction line of connection low pressure (LP) cylinder discharge duct
It connect, is used under the driving for the steam turbine low-pressure pumping that the low pressure (LP) cylinder pump-line exports with the turbine low pressure cylinder,
Steam turbine low-pressure exhaust is extracted by the steam discharge extraction line, generates steaming of the pressure between low-pressure pumping steam and low pressure steam discharge
Vapour；
The input terminal of the steam air heater is connect by jet chimney with the pressure matcher output end, the output of the steam air heater
End is connect with the air preheater；The steam that the steam air heater is used to export by the jet chimney is to entering the warm wind
A cold wind, the secondary cold wind of device are preheated, and a cold wind, the secondary cold wind after preheating are exported to the air preheat
Device absorbs flue gas heat；
The air preheater is connect with the low-level (stack-gas) economizer, and the low-level (stack-gas) economizer is connected with circulating water inlet road and follows
Ring water outlet conduit.
2. a kind of machine stove waste heat coupling with pressure matcher according to claim 1 utilizes system, which is characterized in that institute
It includes the first low pressure (LP) cylinder pump-line and the second low pressure (LP) cylinder pump-line to state low pressure (LP) cylinder pump-line.
3. a kind of machine stove waste heat coupling with pressure matcher according to claim 2 utilizes system, which is characterized in that institute
It states the first low pressure (LP) cylinder pump-line and the second low pressure (LP) cylinder pump-line is respectively equipped with the first valve and the second valve of adjustable aperture
Door.
4. a kind of machine stove waste heat coupling with pressure matcher according to claim 3 utilizes system, which is characterized in that institute
State the third valve that steam discharge extraction line is equipped with adjustable aperture.
5. a kind of machine stove waste heat coupling with pressure matcher according to claim 4 utilizes system, which is characterized in that institute
State the 4th valve that circulating water inlet road is equipped with adjustable aperture.
6. a kind of machine stove waste heat coupling with pressure matcher according to claim 5 utilizes system, which is characterized in that also
Include the energy saving figureofmerit computing module for calculating machine stove waste heat coupling using system unit amount of energy saving index, described the
One valve, the second valve, third valve and the 4th valve aperture based on the energy saving figureofmerit of unit and unit for calculating gained
Whole economic efficiency maximization principle is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247821.3A CN108534126A (en) | 2018-03-23 | 2018-03-23 | It is a kind of with pressure matcher machine stove waste heat coupling utilize system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247821.3A CN108534126A (en) | 2018-03-23 | 2018-03-23 | It is a kind of with pressure matcher machine stove waste heat coupling utilize system |
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| Publication Number | Publication Date |
|---|---|
| CN108534126A true CN108534126A (en) | 2018-09-14 |
Family
ID=63485018
Family Applications (1)
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| CN201810247821.3A Pending CN108534126A (en) | 2018-03-23 | 2018-03-23 | It is a kind of with pressure matcher machine stove waste heat coupling utilize system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595046A (en) * | 2018-11-23 | 2019-04-09 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Large-sized Coal-fired Power group boiler afterheat couples full recycling electricity generation system with turbine exhaust heat |
| CN109611166A (en) * | 2018-11-20 | 2019-04-12 | 华电电力科学研究院有限公司 | A kind of solidifying pumping back heating system and operation method for more low pressure (LP) cylinder Variable Conditions of Steam Turbine |
| CN112228172A (en) * | 2020-10-27 | 2021-01-15 | 国电环境保护研究院有限公司 | Regenerative heat source system of coal-fired power plant carbon-based catalytic flue gas desulfurization and denitrification device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611166A (en) * | 2018-11-20 | 2019-04-12 | 华电电力科学研究院有限公司 | A kind of solidifying pumping back heating system and operation method for more low pressure (LP) cylinder Variable Conditions of Steam Turbine |
| CN109611166B (en) * | 2018-11-20 | 2023-09-05 | 华电电力科学研究院有限公司 | Condensing back-pumping heat supply system for variable working conditions of multi-low pressure cylinder steam turbine and operation method |
| CN109595046A (en) * | 2018-11-23 | 2019-04-09 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Large-sized Coal-fired Power group boiler afterheat couples full recycling electricity generation system with turbine exhaust heat |
| CN109595046B (en) * | 2018-11-23 | 2024-03-19 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Large-scale coal-fired unit boiler waste heat and steam turbine waste heat coupling full recovery power generation system |
| CN112228172A (en) * | 2020-10-27 | 2021-01-15 | 国电环境保护研究院有限公司 | Regenerative heat source system of coal-fired power plant carbon-based catalytic flue gas desulfurization and denitrification device |
| CN112228172B (en) * | 2020-10-27 | 2024-05-31 | 国电环境保护研究院有限公司 | Regeneration heat source system of flue gas desulfurization and denitrification device by coal-based catalysis method of coal-fired power plant |
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