CN102767820B - Smoke waste heat utilizing system at tail of power station boiler applicable to operation in variable working condition - Google Patents
Smoke waste heat utilizing system at tail of power station boiler applicable to operation in variable working condition Download PDFInfo
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- CN102767820B CN102767820B CN201210216829.6A CN201210216829A CN102767820B CN 102767820 B CN102767820 B CN 102767820B CN 201210216829 A CN201210216829 A CN 201210216829A CN 102767820 B CN102767820 B CN 102767820B
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- heat exchanger
- valves
- tube sheet
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- exchanger group
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- 239000002918 waste heat Substances 0.000 title abstract description 11
- 239000000779 smoke Substances 0.000 title abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 27
- 239000003546 flue gas Substances 0.000 claims description 27
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000005494 condensation Effects 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- 239000003245 coal Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000003517 fume Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention belongs to the technical field of energy saving of waste heat utilization, and particularly relates to a smoke waste heat utilizing system at the tail of a power station boiler applicable to operation in a variable working condition. The smoke waste heat utilizing system mainly consists of a back-heating side subsystem and a step type heat exchange subsystem distributed on a tail flue. A certain amount of condensation water is extracted from an inlet of a certain level heater in the back-heating side subsystem according to a boiler operation working condition, and flows into an inlet of the step type heat exchange subsystem by passing through an L1 pipeline through an outlet of the back-heating side subsystem; after carrying out heat exchange with boiler smoke through each level of heat exchanger pipe group arranged in the step type heat exchange subsystem, an outlet of the step type heat exchange subsystem is connected with an outlet of the certain level heater in the back-heating side subsystem through an L2 pipeline, so that system temperature and flow can be sensitively adjusted, and the system is enabled to be at an optimal operation working condition. Meanwhile, the heat exchange subsystem uses a step type improved film design; pipes of each level of a heat exchanger can be arranged in a double-staggered manner; and a flow guide plate is additionally arranged, so that the airflow resistance is reduced, and the heat conduction efficiency is improved.
Description
Technical field
The invention belongs to the energy conservation technical field of UTILIZATION OF VESIDUAL HEAT IN, particularly a kind of boiler tail flue gas bootstrap system adapting to power plant's variable parameter operation.
For the change of boiler tail exhaust gas temperature during power station unit variable parameter operation, by the selecting type design of the grading control of Tube Sheet of Heat Exchanger group and condensed water I/O mode, realize tail flue gas waste heat replacement part and to draw gas the flexible utilization of heating condensate water.Meanwhile, for the actual conditions of boiler tail flue gas and circulation flue thereof, improve the form design of heat exchanger, thus the economy of heat exchange equipment and safe operation under ensureing this operating mode.
Background technology
The energy-saving and emission-reduction of Large-scale fire-electricity unit are the important energy source strategies of China.In China, coal-burning power plant consumes the coal production of the nearly half in the whole nation, and the exhaust gas temperature of general coal unit, at about 120-140 DEG C, causes a large amount of low-grade energy directly discharged to environment, brings huge residual heat resources waste.Along with rising steadily of Coal Energy Source price in recent years, cost of electricity-generating based on coal improves day by day, each thermal power plant is faced with huge economizer pressure, constantly seeks to reduce coal consumption, application technology that economize energy aspect is new, and strengthens relevant fund input.
Effective utilization of fume afterheat is the energy-conservation main path of coal-fired power station boiler, utilize boiler tail flue gas waste-heat condensate water, effectively can not only reduce the exhaust gas temperature of boiler, improve boiler efficiency, and the regenerative steam of part steam turbine can be squeezed by the heat of afterheat heat exchanger input hot systems, when steam turbine admission quantity of steam is constant, exclusion is drawn gas and is returned steam turbine continuation expansion work.Therefore, when fuel input is constant, steam turbine power output can be made to increase, improve the thermal efficiency and the economy of unit.
Reduce the exhaust gas temperature of boiler by heat recovery, though boiler efficiency and power station economy can be improved, due in low-temperature flue gas in boiler tail usually containing, for example SO
2, SO
3, NO
xdeng corrosive gas, when wall surface temperature drops to below acid dew point, easily there is strong low-temperature flue gas corrosion in low temperature tube wall, form the cement-like material based on calcium sulfate with the flying dust in flue gas simultaneously, fume side flowing resistance is increased, blower fan power consumption increases, and exacerbates the corrosion of tube wall, has a strong impact on the safe and economical operation of boiler.Being suitable for boiler tail low-temperature flue gas waste heat at present utilizes special heat exchange equipment still fewer, and is main mainly with monoblock type light pipe heat exchanger, and heat exchanger apparatus is large and ash deposits corrosion problem is serious.
Summary of the invention
The afterbody smoke evacuation change operating mode that the object of the invention is to cause for the variable parameter operation of fired power generating unit causes residual heat resources waste and propose a kind of boiler tail flue gas bootstrap system adapting to power plant's variable parameter operation, it is characterized in that, the described Rear of Utility Boiler smoke waste heat utilization system being applicable to variable parameter operation, forms primarily of backheat side sub-system 1 and the stagewise heat exchange subsystem 2 being distributed in back-end ductwork.
Described backheat side sub-system 1 is in series by 5# low-pressure heater 3,6# low-pressure heater 4,7# low-pressure heater 5 and 8# low-pressure heater 6; The 7th valve is connected in the porch of 5# low-pressure heater 3, the 8th valve is connected in the porch of 6# low-pressure heater 4, connect the 9th valve in the porch of 7# low-pressure heater 5 and be connected the 10th valve respectively with the porch at 8# low-pressure heater 6, described 7th valve, the 8th valve, the 9th valve and the 10th valve converge backheat side sub-system 1 together and export, and are connected to the entrance of the first order Tube Sheet of Heat Exchanger group 25 of the stagewise heat exchange subsystem 2 of back-end ductwork by L1 pipeline; 18 valves, 19 valves, 20 valves and 21 valves are connected respectively at the main condensate pipeline exit of described 5# low-pressure heater 3,6# low-pressure heater 4,7# low-pressure heater 5 and 8# low-pressure heater 6; Described 18 valves, 19 valves, 20 valves and 21 valves converge and form backheat side sub-system 1 entrance afterwards together, and be connected to by L2 pipeline the stagewise heat exchange subsystem 2 of back-end ductwork outlet.
Arrange first order Tube Sheet of Heat Exchanger group 25, second level Tube Sheet of Heat Exchanger group 26, third level Tube Sheet of Heat Exchanger group 27 and fourth stage Tube Sheet of Heat Exchanger group 28 in the stagewise heat exchange subsystem 2 of described back-end ductwork, first order Tube Sheet of Heat Exchanger group 25, second level Tube Sheet of Heat Exchanger group 26, third level Tube Sheet of Heat Exchanger group 27 and fourth stage Tube Sheet of Heat Exchanger group 28 are successively by the series connection of 11 valves, 12 valves and 13 valves; First order Tube Sheet of Heat Exchanger group 25 export connect 14 valves again, second level Tube Sheet of Heat Exchanger group 26 export connect 15 valves again, third level Tube Sheet of Heat Exchanger group 27 exports and connects 16 valves again and export with fourth stage Tube Sheet of Heat Exchanger group 28 and be connected 17 valves again; First order Tube Sheet of Heat Exchanger group 25, second level Tube Sheet of Heat Exchanger group 26, third level Tube Sheet of Heat Exchanger group 27 and fourth stage Tube Sheet of Heat Exchanger group 28, described 14 valves, 15 valves, 16 valves and 17 valves converge the stagewise heat exchange subsystem 2 forming back-end ductwork together afterwards and export.
In the boiler tail flue gas bootstrap system of described adaptation power plant variable parameter operation, TT temperature-measuring element and FT flow transmitter are installed.
The structure of described Tube Sheet of Heat Exchanger group is that adjacent base tube 22 band steel fin 23 is welded formation membrane wall heat exchanger; The pad place of base tube 22 and band steel fin 23 adopts heap melting welding transition Rouno Cormer Pregrinding Wheel 24, and carries out flat smooth process to heap melting welding surface.The placement parallel with flue gas incoming flow of Tube Sheet of Heat Exchanger group, adopts the form along row or stagger arrangement between Guan Zuyu pipe group, to strengthen biography heat transfer effect, arrange wedge shape cowling panel 25 between pipe group simultaneously, to reduce wearing and tearing and conveniently to blow ash.
Adopt between described Guan Zuyu pipe group the form of stagger arrangement be in pipe group between each pipe row along between each pipe row of the longitudinal intercept of flue gas direction stagger arrangement 1/2, adjacent tubes group along flue gas vertical direction stagger arrangement 1/2 transverse cutting distance.
The invention has the beneficial effects as follows the boiler tail exhaust gas temperature dynamic change that this optimization integrated system Integrated Fire group of motors variable parameter operation causes, and the heat demand of condensed water in bleeder heater, by valve switch, the flow-control of the classification off-the-line of design Tube Sheet of Heat Exchanger group and pipeline, realize the flexible utilization of the waste heat of flue gas being carried out to energy match, guarantee that bootstrap system is in best heat recovery and safe operation operating mode.The design of heat exchanger hierarchical arrangement, it is convenient to change, and can change for failure level pipe group.Carry out Local treatment for seriously corroded region, utilize heap melting welding to be welded out knuckle, decrease the rotation dead band at rib Ji Chu, and contribute to the detour flow promoting membrane wall further, thus reduce the spot corrosion infringement that corrosion dirt piles up heat exchanging organ pipe.
Accompanying drawing explanation
Fig. 1 is concrete pipeline and the Valve controlling schematic diagram that fume afterheat utilizes optimization integrated system.
Fig. 2 is the schematic diagram adopting the fume afterheat of classification pipe group structure to utilize membrane heat exchanger.
Detailed description of the invention
The invention provides a kind of Rear of Utility Boiler smoke waste heat utilization system adapting to variable parameter operation.Be explained below in conjunction with drawings and embodiments.
Concrete pipeline and the Valve controlling schematic diagram that fume afterheat utilizes optimization integrated system as shown in Figure 1.This system forms primarily of backheat side sub-system 1 and the stagewise heat exchange subsystem 2 being distributed in back-end ductwork.Wherein, backheat side sub-system 1 is in series by 5# low-pressure heater 3,6# low-pressure heater 4,7# low-pressure heater 5 and 8# low-pressure heater 6; The 7th valve is connected in the porch of 5# low-pressure heater 3, the 8th valve is connected in the porch of 6# low-pressure heater 4, connect the 9th valve in the porch of 7# low-pressure heater 5 and be connected the 10th valve respectively with the porch at 8# low-pressure heater 6, described 7th valve, the 8th valve, the 9th valve and the 10th valve converge together formation backheat side sub-system 1 afterwards and export, and are connected to the entrance of the first order Tube Sheet of Heat Exchanger group 25 of the stagewise heat exchange subsystem 2 of back-end ductwork by L1 pipeline; 18 valves, 19 valves, 20 valves and 21 valves are connected respectively at the main condensate pipeline exit of described 5# low-pressure heater 3,6# low-pressure heater 4,7# low-pressure heater 5 and 8# low-pressure heater 6; Described 18 valves, 19 valves, 20 valves and 21 valves converge and form backheat side sub-system 1 entrance afterwards together, and be connected to by L2 pipeline the stagewise heat exchange subsystem 2 of back-end ductwork outlet.
In the stagewise heat exchange subsystem 2 of back-end ductwork, arrange first order Tube Sheet of Heat Exchanger group 25, second level Tube Sheet of Heat Exchanger group 26, third level Tube Sheet of Heat Exchanger group 27 and fourth stage Tube Sheet of Heat Exchanger group 28, first order Tube Sheet of Heat Exchanger group 25, second level Tube Sheet of Heat Exchanger group 26, third level Tube Sheet of Heat Exchanger group 27 and fourth stage Tube Sheet of Heat Exchanger group 28 are successively by the series connection of 11 valves, 12 valves and 13 valves; First order Tube Sheet of Heat Exchanger group 25 export connect 14 valves again, second level Tube Sheet of Heat Exchanger group 26 export connect 15 valves again, third level Tube Sheet of Heat Exchanger group 27 exports and connects 16 valves again and export with fourth stage Tube Sheet of Heat Exchanger group 28 and be connected 17 valves again; First order Tube Sheet of Heat Exchanger group 25, second level Tube Sheet of Heat Exchanger group 26, third level Tube Sheet of Heat Exchanger group 27 and fourth stage Tube Sheet of Heat Exchanger group 28, described 14 valves, 15 valves, 16 valves and 17 valves converge the stagewise heat exchange subsystem 2 forming back-end ductwork together afterwards and export.
Figure 2 shows that heat exchanger structure schematic diagram concrete in the stagewise heat exchange subsystem of back-end ductwork.In figure, the adjacent base tube 22 of composition heat exchanger is welded with band steel fin 23 and forms membrane wall heat exchanger.The pad place of base tube 22 and band steel fin 23 adopts heap melting welding transition Rouno Cormer Pregrinding Wheel 24, and carries out flat smooth process to heap melting welding surface.The placement parallel with flue gas incoming flow of Tube Sheet of Heat Exchanger group, adopts the form along row or stagger arrangement between Guan Zuyu pipe group, recommend to adopt two being staggered in arrangement between pipe group, strengthen heat transfer heat exchange, arrange cowling panel 25 simultaneously between pipe group, to reduce wearing and tearing and conveniently to blow ash.Adopt between described Guan Zuyu pipe group the form of stagger arrangement be in pipe group between each pipe row along between each pipe row of the longitudinal intercept of flue gas direction stagger arrangement 1/2, adjacent tubes group along flue gas vertical direction stagger arrangement 1/2 transverse cutting distance.
In power plant's actual motion, can according to the operating condition of boiler, a certain amount of main condensate is extracted from the 5#-8# low-pressure heater porch of backheat side sub-system 1, the entrance that rear formation backheat side sub-system 1 exports the first order Tube Sheet of Heat Exchanger group 25 flowing into the stagewise heat exchange subsystem 2 of back-end ductwork through L1 pipeline is collected respectively by 7-the 10th valve, in the stagewise heat exchange subsystem 2 of back-end ductwork, first order Tube Sheet of Heat Exchanger group 25 is set, second level Tube Sheet of Heat Exchanger group 26, after third level Tube Sheet of Heat Exchanger group 27 and fourth stage Tube Sheet of Heat Exchanger group 28 and boiler smoke heat exchange, the entrance being connected to backheat side sub-system 1 by L2 pipeline is exported from the stagewise heat exchange subsystem 2 of back-end ductwork, realize the extraction flow control that needs at different levels substitute, can according to boiler tail exhaust gas temperature, the valve switch imported and exported by controlling classification pipe group controls loading and the off-the-line of heat exchanger, the off-the-line order of classification pipe group is: along the direction of flue gas incoming flow, from high-temperature pipe group to cryotronl group successively off-the-line, thus the hot-fluid of preferred temperature level can be obtained.
Claims (4)
1. one kind adapts to the boiler tail flue gas bootstrap system of power plant's variable parameter operation, it is characterized in that, the boiler tail flue gas bootstrap system of described adaptation power plant variable parameter operation, primarily of backheat side sub-system (1) and stagewise heat exchange subsystem (2) composition being distributed in back-end ductwork;
Described backheat side sub-system (1) is in series by 5# low-pressure heater (3), 6# low-pressure heater (4), 7# low-pressure heater (5) and 8# low-pressure heater (6); The 7th valve is connected in the porch of 5# low-pressure heater (3), the 8th valve is connected in the porch of 6# low-pressure heater (4), connect the 9th valve in the porch of 7# low-pressure heater (5) and be connected the 10th valve respectively with the porch at 8# low-pressure heater (6), described 7th valve, the 8th valve, the 9th valve and the 10th valve converge and form backheat side sub-system (1) outlet afterwards together, and are connected to the entrance of the first order Tube Sheet of Heat Exchanger group (25) of the stagewise heat exchange subsystem (2) of back-end ductwork by L1 pipeline; 18 valves, 19 valves, 20 valves and 21 valves are connected respectively at the main condensate pipeline exit of described 5# low-pressure heater (3), 6# low-pressure heater (4), 7# low-pressure heater (5) and 8# low-pressure heater (6); Described 18 valves, 19 valves, 20 valves and 21 valves converge and form backheat side sub-system (1) entrance afterwards together, and are connected to the outlet of the stagewise heat exchange subsystem (2) of back-end ductwork by L2 pipeline;
Arrange first order Tube Sheet of Heat Exchanger group (25), second level Tube Sheet of Heat Exchanger group (26), third level Tube Sheet of Heat Exchanger group (27) and fourth stage Tube Sheet of Heat Exchanger group (28) in the stagewise heat exchange subsystem (2) of described back-end ductwork, first order Tube Sheet of Heat Exchanger group (25), second level Tube Sheet of Heat Exchanger group (26), third level Tube Sheet of Heat Exchanger group (27) and fourth stage Tube Sheet of Heat Exchanger group (28) are successively by the series connection of 11 valves, 12 valves and 13 valves; First order Tube Sheet of Heat Exchanger group (25) outlet connects 14 valves again, second level Tube Sheet of Heat Exchanger group (26) outlet connects 15 valves again, third level Tube Sheet of Heat Exchanger group (27) outlet connects 16 valves again and is connected 17 valves again with fourth stage Tube Sheet of Heat Exchanger group (28) outlet; Described 14 valves, 15 valves, 16 valves and 17 valves converge stagewise heat exchange subsystem (2) outlet forming back-end ductwork together afterwards.
2. adapt to the boiler tail flue gas bootstrap system of power plant's variable parameter operation according to claim 1, it is characterized in that, in the boiler tail flue gas bootstrap system of described adaptation power plant variable parameter operation, TT temperature-measuring element and FT flow transmitter are installed.
3. adapt to the boiler tail flue gas bootstrap system of power plant's variable parameter operation according to claim 1, it is characterized in that, the structure of described Tube Sheet of Heat Exchanger group is that adjacent base tube (22) band steel fin (23) is welded formation membrane wall heat exchanger; The pad place of base tube (22) and band steel fin (23) adopts heap melting welding transition Rouno Cormer Pregrinding Wheel (24), and carries out flat smooth process to heap melting welding surface; The placement parallel with flue gas incoming flow of Tube Sheet of Heat Exchanger group, adopts the form along row or stagger arrangement between Guan Zuyu pipe group, to strengthen biography heat transfer effect, arrange wedge shape cowling panel (25) between pipe group simultaneously, to reduce wearing and tearing and conveniently to blow ash.
4. adapt to the boiler tail flue gas bootstrap system of power plant's variable parameter operation according to claim 1, it is characterized in that, adopt between described Guan Zuyu pipe group the form of stagger arrangement be in pipe group between each pipe row along between each pipe row of the longitudinal intercept of flue gas direction stagger arrangement 1/2, adjacent tubes group along flue gas vertical direction stagger arrangement 1/2 transverse cutting distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210216829.6A CN102767820B (en) | 2012-06-27 | 2012-06-27 | Smoke waste heat utilizing system at tail of power station boiler applicable to operation in variable working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210216829.6A CN102767820B (en) | 2012-06-27 | 2012-06-27 | Smoke waste heat utilizing system at tail of power station boiler applicable to operation in variable working condition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102767820A CN102767820A (en) | 2012-11-07 |
| CN102767820B true CN102767820B (en) | 2015-07-15 |
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| CN201210216829.6A Expired - Fee Related CN102767820B (en) | 2012-06-27 | 2012-06-27 | Smoke waste heat utilizing system at tail of power station boiler applicable to operation in variable working condition |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062754B (en) * | 2012-12-28 | 2014-08-20 | 华北电力大学 | Power station machine furnace integrated cold end comprehensive optimization system |
| CN106765259B (en) * | 2016-11-23 | 2018-09-18 | 广东东燃热能科技有限公司 | A kind of energy-efficient method of boiler afterheat recycling |
| CN110500572A (en) * | 2019-09-02 | 2019-11-26 | 南通万达锅炉有限公司 | A kind of modular condensate heater |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB841040A (en) * | 1957-08-06 | 1960-07-13 | Babcock & Wilcox Ltd | Improvements in or relating to steam generators provided with air heater means |
| CN86105222A (en) * | 1986-08-14 | 1987-06-24 | 西安交通大学 | Utilize the low-pressure energy-saving hybrid system of smoke discharging residual heat |
| US5293841A (en) * | 1992-03-06 | 1994-03-15 | Gea Luftkuhler Gmbh | Arrangement for utilizing the heat contained in the exhaust gas of a coal-fired boiler |
| CN202074880U (en) * | 2011-03-15 | 2011-12-14 | 福建成信绿集成有限公司 | Automatic control system used in acid resistant dew point corrosion of a boiler smoke evacuation heat recovery heat exchanger |
| CN202915335U (en) * | 2012-06-27 | 2013-05-01 | 华北电力大学 | Power station boiler rear smoke waste-heat utilization device applicable to variable working condition operation |
-
2012
- 2012-06-27 CN CN201210216829.6A patent/CN102767820B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB841040A (en) * | 1957-08-06 | 1960-07-13 | Babcock & Wilcox Ltd | Improvements in or relating to steam generators provided with air heater means |
| CN86105222A (en) * | 1986-08-14 | 1987-06-24 | 西安交通大学 | Utilize the low-pressure energy-saving hybrid system of smoke discharging residual heat |
| US5293841A (en) * | 1992-03-06 | 1994-03-15 | Gea Luftkuhler Gmbh | Arrangement for utilizing the heat contained in the exhaust gas of a coal-fired boiler |
| CN202074880U (en) * | 2011-03-15 | 2011-12-14 | 福建成信绿集成有限公司 | Automatic control system used in acid resistant dew point corrosion of a boiler smoke evacuation heat recovery heat exchanger |
| CN202915335U (en) * | 2012-06-27 | 2013-05-01 | 华北电力大学 | Power station boiler rear smoke waste-heat utilization device applicable to variable working condition operation |
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| Publication number | Publication date |
|---|---|
| CN102767820A (en) | 2012-11-07 |
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Granted publication date: 20150715 |