CN107101192B - A kind of the low-level (stack-gas) economizer system and thermal power plant unit of thermal power plant unit - Google Patents
A kind of the low-level (stack-gas) economizer system and thermal power plant unit of thermal power plant unit Download PDFInfo
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- CN107101192B CN107101192B CN201710302066.XA CN201710302066A CN107101192B CN 107101192 B CN107101192 B CN 107101192B CN 201710302066 A CN201710302066 A CN 201710302066A CN 107101192 B CN107101192 B CN 107101192B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000006392 deoxygenation reaction Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 15
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 47
- 239000000779 smoke Substances 0.000 description 12
- 238000000605 extraction Methods 0.000 description 8
- 230000008676 import Effects 0.000 description 8
- 239000002918 waste heat Substances 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000009998 heat setting Methods 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 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
- F22D1/40—Combinations of exhaust-steam and smoke-gas preheaters
-
- 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
- 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
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses the low-level (stack-gas) economizer systems and thermal power plant unit of a kind of thermal power plant unit, wherein, the low-level (stack-gas) economizer system of thermal power plant unit includes one group of low-pressure heater that low-level (stack-gas) economizer, oxygen-eliminating device and the low-pressure heater being connected in series by least two are constituted, condensed water is transmitted to low-level (stack-gas) economizer after mixing into one group of low-pressure heater heating again and is heated, and is finally transmitted to oxygen-eliminating device and carries out deoxygenation processing；It is characterized in that, the low-level (stack-gas) economizer system of the thermal power plant unit further includes heat exchangers for district heating, both heat supply network return water and condensed water into heat exchangers for district heating enter low-level (stack-gas) economizer using parallel way and are heated.
Description
Technical field
The invention belongs to thermal power plant unit field more particularly to the low-level (stack-gas) economizer systems and heat supply machine of a kind of thermal power plant unit
Group.
Background technique
The low-level (stack-gas) economizer system (see Fig. 1) of generation current unit is from the import of #7 low-pressure heater, #8 low-pressure heater
Import exports after low-level (stack-gas) economizer heats to #5 low-pressure heater after drawing mixing respectively, can use fume afterheat in this way and mentions
The thermal efficiency of high unit, but the low-pressure coal saver design be outlet lead to #5 it is low plus outlet, when low province's exit water temperature be lower than #5
Oxygen-eliminating device steam extraction certainly will be increased when low plus exit water temperature to make up underheat.
In addition, fired power generating unit is in future period peak regulation, part of generating units may underload long-play, to prevent SCR
Import smoke temperature is too low, the reduction of SCR internal oxidition agent oxidation effectiveness is caused, or even oxidant " poisoning " phenomenon occur, to cause machine
Group nitrogen oxide emission is exceeded, and to solve emission excessive problem when underload, unit is generallyd use from boiler horizontal gas pass
Before taking part high-temperature flue gas to SCR away, SCR import smoke temperature is improved, to guarantee that SCR oxidant works normally, at this moment unit is arranged
The more usual temperature drift of smoke temperature degree, and low-level (stack-gas) economizer existing system design feature is low province only single heat-setting water system,
The waste heat that exhaust gas temperature cannot be utilized in this way, can increase loss caused by high level steam extraction.
Summary of the invention
In order to solve the above-mentioned technical problem, the first object of the present invention is to provide a kind of low-level (stack-gas) economizer system of thermal power plant unit
System, makes full use of fume afterheat, in turn avoids loss caused by increasing high level steam extraction, moreover it is possible to realize to unit heat supply temperature
Temperature flexibly controls, and the economy of low-level (stack-gas) economizer is made to reach the optimization system that optimal thermal power plant unit uses low-level (stack-gas) economizer.
A kind of low-level (stack-gas) economizer system of thermal power plant unit of the invention, including low-level (stack-gas) economizer, oxygen-eliminating device and by least two
One group of low-pressure heater that the low-pressure heater of a series connection is constituted, after condensed water enters one group of low-pressure heater heating mixing
It is transmitted to low-level (stack-gas) economizer again to be heated, is finally transmitted to oxygen-eliminating device and carries out deoxygenation processing；
The low-level (stack-gas) economizer system of the thermal power plant unit further includes heat exchangers for district heating, into the heat supply network return water of heat exchangers for district heating
Enter low-level (stack-gas) economizer with both condensed water use parallel ways to be heated.
Further, the heat exchangers for district heating heats heat supply network return water by boiler steam turbine steam.The present invention fills
Divide and heat supply network return water is heated in heat exchangers for district heating using boiler steam turbine steam, takes full advantage of boiler steam turbine steam heat
Can, avoid the waste of thermal energy.
Further, heat supply network return water enters heat exchangers for district heating by heat-net-pipeline, is provided with heat supply network on the heat-net-pipeline
Control valve.The present invention can adjust the working condition of heat exchangers for district heating by regulating of heating net valve, i.e., whether heat heat supply network and return
Water.
Further, it is connected between the low-pressure heater by condensed water water inlet line.Condensed water of the invention passes through
Condensed water water inlet line, which is delivered in low-pressure heater, to be heated, and improves the temperature of condensed water step by step.Wherein, one group of low pressure
Number in heater specifically can set quantity according to the actual situation.
Further, condensed water, which enters after one group of low-pressure heater heating mixing, saves coal through condensate circulating water pipe road and low temperature
Device is connected.
Further, condensed water control valve is provided on the condensate circulating water pipe road.The present invention is by adjusting condensation
Water regulating valve door can control the condensing water flow in condensate circulating water pipe road.
Further, the regulating of heating net valve is solenoid valve, and the regulating of heating net valve is connected with controller.
Further, the condensed water control valve is solenoid valve, and the condensed water control valve is connected with controller.
The present invention is able to pass through the controller to control the big small guide vane of regulating of heating net valve and condensed water control valve respectively,
So that in any operating condition, any season, any regulative mode, realization smoke temperature waste heat can be made full use of and
Avoid loss caused by increasing high level steam extraction.
Further, boiler steam turbine steam is transmitted to heat exchangers for district heating by jet chimney, also sets on the jet chimney
It is equipped with steam control valve door.The present invention also adjusts the boiler steam turbine steam into heat exchangers for district heating by steam control valve door
Amount, achievees the purpose that make full use of boiler steam turbine steam resource.
The second object of the present invention is to provide a kind of thermal power plant unit.Thermal power plant unit of the invention, including described above
The low-level (stack-gas) economizer system of thermal power plant unit.
Compared with prior art, the beneficial effects of the present invention are:
The present invention, can be in any operating condition, any season, any adjusting side in such a way that hot net water and condensed water are in parallel
In the case of formula, realization smoke temperature waste heat can be made full use of and increase high level steam extraction caused by loss, simultaneously
It realizes the flexible control to heat supply network exit water temperature, the economy of low-level (stack-gas) economizer is made to reach best.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the existing structure schematic diagram of low-level (stack-gas) economizer system；
Fig. 2 is low-level (stack-gas) economizer system structure diagram of the invention.
Wherein, 1. low-level (stack-gas) economizer, 2. oxygen-eliminating devices, 3. flue gases, 4.#8 low-pressure heater, 5.#7 low-pressure heater, 6.#6
Low-pressure heater, 7.#5 low-pressure heater, 8. heat exchangers for district heatings, 9. boiler steam turbine steam；A, B, C, D are regulating of heating net valve
Door；A1, B1, C1, D1, E, F, G, H, I, J, K are condensed water control valve.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Currently, since fired power generating unit is in future period peak regulation, the possible underload long-play of part of generating units, to prevent
SCR import smoke temperature is too low, the reduction of SCR internal oxidition agent oxidation effectiveness is caused, or even oxidant " poisoning " phenomenon occur, to cause
Unit nitrogen oxide emission is exceeded, and to solve emission excessive problem when underload, unit is generallyd use from the horizontal cigarette of boiler
Before part high-temperature flue gas to SCR is taken in road away, SCR import smoke temperature is improved, thus guarantee that SCR oxidant works normally, at this moment unit
The more usual temperature drift of exhaust gas temperature, and low-level (stack-gas) economizer existing system design feature is low province only single heat-setting water system
System.
To realize the waste heat for making full use of exhaust gas temperature, as far as possible reduction exhaust gas temperature.In Fig. 2, the present invention will condense
Water enters low-level (stack-gas) economizer using parallel way with heat supply network return water and is heated, low-level (stack-gas) economizer system group of the invention, including
The condensing water conduit of heat exchangers for district heating, one group of concatenated low-pressure heater and its connection, low-level (stack-gas) economizer and connected pipeline and
Its accessory.
Specifically, the low-level (stack-gas) economizer system of a kind of thermal power plant unit of the invention, as shown in Fig. 2, including low-level (stack-gas) economizer
1, one group of low-pressure heater that oxygen-eliminating device 2 and the low-pressure heater being connected in series by least two are constituted, condensed water enter one group
It is transmitted to low-level (stack-gas) economizer again after low-pressure heater heating mixing to be heated, is finally transmitted to oxygen-eliminating device 2 and carries out deoxygenation processing；
The low-level (stack-gas) economizer system of the thermal power plant unit further includes heat exchangers for district heating 8, and the heat supply network into heat exchangers for district heating 8 returns
Both water and condensed water enter low-level (stack-gas) economizer 1 using parallel way and are heated.
Wherein, low-level (stack-gas) economizer system group of the invention includes one group of concatenated #8 low-pressure heater 4, #7 low-pressure heater
5, #6 low-pressure heater 6 and #5 low-pressure heater add 7, and condensed water passes through first order low-pressure heater, that is, 4 He of #8 low-pressure heater
It is in parallel with heat supply network water inlet after the low outlet mixing for adding i.e. #7 low-pressure heater 5 in the second level to be heated into low-pressure coal saver 3, it is low
The outlet of pressure economizer 2 is then connect with the import of most final stage low-pressure heater, that is, #5 low-pressure heater 7.
Heat exchangers for district heating 8 heats heat supply network return water by boiler steam turbine steam 9.The present invention makes full use of boiler vapour
Machine steam heats heat supply network return water in heat exchangers for district heating, takes full advantage of boiler steam turbine steam thermal energy, avoids heat
The waste of energy.
Wherein, heat supply network return water enters heat exchangers for district heating 8 by heat-net-pipeline, is provided with regulating of heating net on the heat-net-pipeline
Valve.The present invention can adjust the working condition of heat exchangers for district heating by regulating of heating net valve, i.e., whether heat heat supply network return water.
In a particular embodiment, it is connected between low-pressure heater by condensed water water inlet line.Condensed water of the invention is logical
It crosses condensed water water inlet line and is delivered in low-pressure heater and heated, improve the temperature of condensed water step by step.Wherein, one group it is low
Number in pressure heater specifically can set quantity according to the actual situation.
In a particular embodiment, condensed water enter after the heating mixing of one group of low-pressure heater through condensate circulating water pipe road with it is low
Warm economizer is connected.
Wherein, condensed water control valve is provided on the condensate circulating water pipe road.The present invention is by adjusting condensed water tune
Section valve can control the condensing water flow in condensate circulating water pipe road.
In a particular embodiment, the regulating of heating net valve is solenoid valve, and the regulating of heating net valve is connected with controller.
In a particular embodiment, condensed water control valve is solenoid valve, and the condensed water control valve is connected with controller.
The present invention is able to pass through the controller to control the big small guide vane of regulating of heating net valve and condensed water control valve respectively,
So that in any operating condition, any season, any regulative mode, realization smoke temperature waste heat can be made full use of and
Avoid loss caused by increasing high level steam extraction.
In a particular embodiment, boiler steam turbine steam is transmitted to heat exchangers for district heating, the jet chimney by jet chimney
On be additionally provided with steam control valve door.The present invention also adjusts the boiler steam turbine into heat exchangers for district heating by steam control valve door
Quantity of steam achievees the purpose that make full use of boiler steam turbine steam resource.
The low-level (stack-gas) economizer System Working Principle of thermal power plant unit of the invention are as follows:
When summer unit not heat supply, unit heat-setting water closes A, B, C, D, I valve, opens E, F, H, J, K valve
Door, #7 low-pressure heater, #8 low-pressure heater number outlet condensate are selected matching by entering low-level (stack-gas) economizer after mixing
Low-pressure heater outlet mixing returns to the outlet of #5 low-pressure heater, utilizes smoke discharging residual heat heat-setting water, winter heat supply network after heating
A, B, C, D, E, F, G, I, J, K valve are opened in heat supply, and when underload, to guarantee that unit SCR is worked normally, unit is generallyd use
Before taking part high-temperature flue gas to SCR away from boiler horizontal gas pass, SCR import smoke temperature is improved, winter mainly heats hot net water, leads to
C, D, E, F, J, K valve are overregulated, the more flexible control heat supply network leaving water temperature of flow of inlet water is adjusted, by adjusting E, F valve regulated
Inflow temperature, heating part condensed water, at this moment low-level (stack-gas) economizer heats the heat relative reduction heated after hot net water to condensate, institute
To guide to #5 low-pressure heater entrance after heating, matching low-pressure heater is selected to export mixing.
The present invention is also conceivable to adjust the installation site of low-level (stack-gas) economizer, and general low-level (stack-gas) economizer is mounted in electricity and removes
Between the sulfur removal technology of dirt, it may be considered that low-level (stack-gas) economizer is added between air preheater and electric precipitation, such temperature more Gao Jiare
Water supply is more abundant, but the too low desulfurization effect to back of exhaust gas temperature has an impact, this can be by adjusting heat-setting water
Amount control exhaust gas temperature will not be too low so that influence desulfurization effect, generated effect of the invention: first is that more by two-way
It is flexible to adjust exhaust gas temperature；Second is that abundant heat-setting water, improves unit economy.And improvement cost is relatively low.
The present invention, can be in any operating condition, any season, any adjusting side in such a way that hot net water and condensed water are in parallel
In the case of formula, realization smoke temperature waste heat can be made full use of and increase high level steam extraction caused by loss, simultaneously
It realizes the flexible control to heat supply network exit water temperature, the economy of low-level (stack-gas) economizer is made to reach best.
The present invention also provides a kind of thermal power plant units.
Thermal power plant unit of the invention, the low-level (stack-gas) economizer system including above-mentioned thermal power plant unit as shown in Figure 2, in addition to low temperature
Except economizer system, the other structures of thermal power plant unit are existing structure, will be not repeated herein.
Thermal power plant unit of the invention utilizes low-level (stack-gas) economizer system, crosses the mode of hot net water and condensed water parallel connection, Ke Yi
In the case of any operating condition, any season, any regulative mode, realization smoke temperature waste heat can be made full use of and
Increase and lost caused by high level steam extraction, while realizing the flexible control to heat supply network exit water temperature, makes the economy of low-level (stack-gas) economizer
Property reaches best.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of low-level (stack-gas) economizer system of thermal power plant unit, including low-level (stack-gas) economizer, oxygen-eliminating device and it is connected in series by least two
One group of low-pressure heater constituting of low-pressure heater, condensed water enter after the heating mixing of one group of low-pressure heater be transmitted to again it is low
Warm economizer is heated, and is finally transmitted to oxygen-eliminating device and is carried out deoxygenation processing；It is characterized in that, the low temperature of the thermal power plant unit saves
Coal device system further includes heat exchangers for district heating, is entered into both the heat supply network return water of heat exchangers for district heating and condensed water using parallel way
Low-level (stack-gas) economizer is heated.
2. a kind of low-level (stack-gas) economizer system of thermal power plant unit as described in claim 1, which is characterized in that the heat exchangers for district heating
Heat supply network return water is heated by boiler steam turbine steam.
3. a kind of low-level (stack-gas) economizer system of thermal power plant unit as described in claim 1, which is characterized in that heat supply network return water passes through heat
Network management road enters heat exchangers for district heating, and regulating of heating net valve is provided on the heat-net-pipeline.
4. a kind of low-level (stack-gas) economizer system of thermal power plant unit as described in claim 1, which is characterized in that the low-pressure heater
Between by condensed water water inlet line be connected.
5. a kind of low-level (stack-gas) economizer system of thermal power plant unit as described in claim 1, which is characterized in that condensed water enters one group
It is connected through condensate circulating water pipe road with low-level (stack-gas) economizer after low-pressure heater heating mixing.
6. a kind of low-level (stack-gas) economizer system of thermal power plant unit as claimed in claim 5, which is characterized in that the condensed water circulation
Condensed water control valve is provided on pipeline.
7. a kind of low-level (stack-gas) economizer system of thermal power plant unit as claimed in claim 3, which is characterized in that the regulating of heating net valve
Door is solenoid valve, and the regulating of heating net valve is connected with controller.
8. a kind of low-level (stack-gas) economizer system of thermal power plant unit as claimed in claim 6, which is characterized in that the condensed water is adjusted
Valve is solenoid valve, and the condensed water control valve is connected with controller.
9. a kind of low-level (stack-gas) economizer system of thermal power plant unit as claimed in claim 2, which is characterized in that boiler steam turbine steam is logical
It crosses jet chimney and is transmitted to heat exchangers for district heating, steam control valve door is additionally provided on the jet chimney.
10. a kind of thermal power plant unit, which is characterized in that the low temperature including thermal power plant unit as claimed in any one of claims 1-9 wherein
Economizer system.
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| CN113669716B (en) * | 2021-06-29 | 2024-03-19 | 华能国际电力股份有限公司大连电厂 | Low-temperature economizer and drainage recovery coupling water supply system and method |
| CN114001348B (en) * | 2021-11-24 | 2023-08-25 | 三河发电有限责任公司 | Thermodynamic system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886804A (en) * | 2010-05-26 | 2010-11-17 | 中国电力工程顾问集团华北电力设计院工程有限公司 | All-backheating drainage system of heat supply network heater for supercritical concurrent boiler thermal power plant |
| CN103032867A (en) * | 2011-05-19 | 2013-04-10 | 中国电力工程顾问集团华东电力设计院 | Multilevel efficient replaceable type smoke waste heat using system |
| CN204922936U (en) * | 2015-08-13 | 2015-12-30 | 山东电力研究院 | Low pressure economizer connected system |
| AU2011218668B2 (en) * | 2010-09-01 | 2016-07-28 | The Babcock & Wilcox Company | Steam cycle efficiency improvement with pre-economizer |
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2017
- 2017-05-02 CN CN201710302066.XA patent/CN107101192B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886804A (en) * | 2010-05-26 | 2010-11-17 | 中国电力工程顾问集团华北电力设计院工程有限公司 | All-backheating drainage system of heat supply network heater for supercritical concurrent boiler thermal power plant |
| AU2011218668B2 (en) * | 2010-09-01 | 2016-07-28 | The Babcock & Wilcox Company | Steam cycle efficiency improvement with pre-economizer |
| CN103032867A (en) * | 2011-05-19 | 2013-04-10 | 中国电力工程顾问集团华东电力设计院 | Multilevel efficient replaceable type smoke waste heat using system |
| CN204922936U (en) * | 2015-08-13 | 2015-12-30 | 山东电力研究院 | Low pressure economizer connected system |
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