CN202303337U - Multilevel condensation water heating system - Google Patents
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- CN202303337U CN202303337U CN2011203865804U CN201120386580U CN202303337U CN 202303337 U CN202303337 U CN 202303337U CN 2011203865804 U CN2011203865804 U CN 2011203865804U CN 201120386580 U CN201120386580 U CN 201120386580U CN 202303337 U CN202303337 U CN 202303337U
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Abstract
The utility model discloses a multilevel condensation water heating system, which comprises a boiler, a tail flue gas treatment system and a flue gas waste heat recovery system. The steam output end of the boiler is respectively connected with an air preheater and a steam turbine. The condensation water input end of the boiler is connected with a high-pressure heater. A first-level steam-water heat exchanger is disposed in a flue of a booster fan connected with an absorption tower. A second-level steam-water heat exchanger is disposed in a flue of the air preheater connected with a dust catcher. The input end of the first-level steam-water heat exchanger is connected with the condensation water input end of a low-pressure heater through a pipeline. The output end of the first-level steam-water heat exchanger is connected with the input end of the second-level steam-water heat exchanger through a pipeline. The output end of the second-level steam-water heat exchanger is connected with the condensation water output end of the low-pressure heater through a pipeline. The multilevel condensation water heating system adopts multilevel heat exchange, is capable of fully utilizing waste heat of flue gas, and is also capable of effectively overcoming the defects that a traditional low-temperature heater is easy in clogging, prone to corrosion and abrasion and high in production cost.
Description
Technical field
The utility model relates to a kind of condensate heating system, particularly a kind of multistage condensate heating system.
Background technology
SO2 is one of main atmosphere pollution of face of mankind; SO2 in the atmosphere can cause serious harm to human body, biology and natural environment; The sulfur dioxide of low concentration can influence the respiratory system of animal and human's class, and concentration Gao Shihui causes bronchitis, asthma, to respiratory disease and cardiopathic people are arranged; To cause the state of an illness to increase the weight of, severe patient is in peril of one's life.Sulfur dioxide still is the topmost acidic materials that acid rain forms, and acid rain meeting corrosion material, destruction ecological environment make the forest withered death, make crop production reduction, make water acidification and endanger aquatic animals and plants.
The SO2 of coal-burning power plant's discharging is the main reason of China's sulfur dioxide pollution.The coal-fired plant flue gas desulfurization is the most important thing of China control SO2 discharging.Along with the sustained and rapid development of China's economy, power construction is with unprecedented developing at a high speed, and the coal-burning power plant is the main provider of China Power with continuing in the quite long from now on period of history, and the SO2 of coal-burning power plant administers and shoulders heavy responsibilities.
Follow continuing to increase of national energy-saving and emission-reduction dynamics, especially the reduction of discharging of high pollution industry is required the enforcement of strict day by day and the preferential electrovalence policy of desulfurization, the installation that substantial contribution carries out flue gas desulfur device is dropped in the thermal power plant in recent years.Flue gas desulfur device has been installed by present domestic most thermal power plants, and power station tail flue gas SO2 emission level has obtained reducing greatly.
In general, should be under the boiler tail flue gas normal condition at 120～140 ℃, for some power plant, because the relation of ature of coal and operation level has caused exhaust gas temperature to reach 160～170 ℃.In order to reduce the loss of smoke exhaust heat, in flue, install low-level (stack-gas) economizer usually additional, install low-level (stack-gas) economizer additional after, the flue-gas temperature that gets into the absorption tower is about 80 ℃.Shown in Figure 5 is to concern between certain the 2 * 300MW of power plant generator set desulfurization device portal former flue gas cigarette temperature and the average fresh water (FW) consumption of desulphurization system separate unit.This shows, through to desulphurization system inlet flue gas temperature afterheat utilization, not only can fuel savings, can further reduce the water consumption of desulphurization system simultaneously, reach energy-saving and cost-reducing final purpose.
The method for arranging of tradition coal-burning power plant low-level (stack-gas) economizer has two kinds:
Arrangement one: low-level (stack-gas) economizer is arranged in the preceding flue of deduster inlet, the cigarette temperature drop is low to moderate more than the acid dew-point temperature.This arrangement needs to consider to cause dust deposit in flue because of setting up set of heat exchange tubes.Because the place working environment is comparatively abominable, flue dust is bigger to the pipe fitting wearing and tearing, so the pipe fitting material also need adopt high-abrasive material.In addition, because heat is bigger, the operating temperature of upstream device (like deduster, air-introduced machine, back-end ductwork, booster fan etc.) is bordering on the flue gas acid dew point temperature, and therefore the corrosion to upstream device also is easier to take place.
Arrangement two: low-level (stack-gas) economizer is arranged in desulfurization duct, the cigarette temperature drop is low to moderate more than the acid dew-point temperature.This arrangement need to consider the low corrosion of fume gas condensation heat exchanging pipe fitting afterwards of cigarette temperature drop, so the heat exchange pipe fitting is usually by expensive corrosion-resistant stainless steel or alloy manufacturing.In addition, because the flue gas that desulfurization operation possibly cause returns suction, cause desulfurization slurry to pour in down a chimney the gas approach to the absorption tower, slurries deposit and stop up the flue gas circulation passage between the pipe fitting, also can cause corrosion to pipe fitting.Therefore not only need adopt the resistant material pipe manufacturing, also need strengthen spacing between pipes, need take long desulfurization duct space, make the absorption tower gas approach long, the difficulty that has caused flue to arrange.
The utility model content
The purpose of the utility model is, a kind of multistage condensate heating system is provided, and it adopts multi-stage heat exchanger, can make full use of the waste heat of flue gas, and can effectively solve traditional low-temperature heater and be prone to shortcoming stifled grey, perishable, easy to wear and that cost is high.
The technical scheme of the utility model: a kind of multistage condensate heating system; Comprise boiler, tail flue gas treatment system and flue gas waste heat recovery system; The tail flue gas treatment system comprises air preheater, deduster, booster fan and absorption tower, and flue gas waste heat recovery system comprises steam turbine, low-pressure heater, high-pressure heater; The steam output end of boiler is connected with steam turbine with air preheater respectively; The condensate input of boiler is connected with high-pressure heater; Be provided with the one-level air-water heat exchanger in booster fan and the flue that the absorption tower is connected; Be provided with the secondary air-water heat exchanger in air preheater and the flue that deduster is connected; The input of one-level air-water heat exchanger is connected with the condensate input of low-pressure heater through pipeline, and the output of one-level air-water heat exchanger is connected with the input of secondary air-water heat exchanger through pipeline, and the output of secondary air-water heat exchanger is connected with the condensate output of low-pressure heater through pipeline.
Aforesaid being applied in the multistage condensate heating system that residual heat from boiler fume reclaims; Said tail flue gas treatment system also comprises air-introduced machine, air-introduced machine outlet damper, clean flue, clean gas baffle and chimney; One end of air-introduced machine is connected with deduster, and the other end of air-introduced machine is provided with the air-introduced machine outlet damper, and the air-introduced machine outlet damper is connected with the absorption tower through former flue; The absorption tower is connected through the end of clean flue with clean gas baffle, and the other end of clean damper is connected with chimney.
Aforesaid being applied in the multistage condensate heating system that residual heat from boiler fume reclaims; Flue gas waste heat recovery system also comprises superheater, air cooling system, condensate pump, the polishing unit that condenses, oxygen-eliminating device, feed pump and generator; Superheater is located on the pipeline between steam turbine and the boiler, and steam turbine, direct air cooling system, condensate pump, the polishing unit that condenses, low-pressure heater, oxygen-eliminating device, feed pump, high-pressure heater are connected in series through pipeline successively; The generator steam turbine connects.
Aforesaid being applied in the multistage condensate heating system that residual heat from boiler fume reclaims, said air cooling system adopts direct air cooling system or indirect air cooling system.
Aforesaid being applied in the multistage condensate heating system that residual heat from boiler fume reclaims; Said low-pressure heater comprises one-level low-pressure heater, secondary low-pressure heater, three grades of low-pressure heaters; The input of one-level air-water heat exchanger is connected through the condensate input of pipeline with any one-level low-pressure heater, and the output of secondary air-water heat exchanger is connected with the condensate output of this grade low-pressure heater through pipeline.
Aforesaid being applied in the multistage condensate heating system that residual heat from boiler fume reclaims, the connecting line of one-level air-water heat exchanger and low-pressure heater condensate input is provided with force (forcing) pump.
Aforesaid being applied in the multistage condensate heating system that residual heat from boiler fume reclaims, said one-level air-water heat exchanger and secondary air-water heat exchanger are low-level (stack-gas) economizer.
Aforesaid being applied in the multistage condensate heating system that residual heat from boiler fume reclaims, the heat-exchanging tube bundle of said one-level air-water heat exchanger adopts corrosion-resistant stainless steel or nickel-base alloy steel to form.Corrosion-resistant stainless steel adopts the above grade of 316L usually.
Aforesaid being applied in the multistage condensate heating system that residual heat from boiler fume reclaims, the finned tube that the heat-exchanging tube bundle of said secondary air-water heat exchanger adopts high-abrasive material to process is made.Such as adopting the chromising carbon steel.
Compared with prior art; The utility model is owing to adopt the segmentation heat exchange mode; Flue sets up one-level air-water heat exchanger and secondary air-water heat exchanger separately before desulfurization duct and deduster inlet, owing to be provided with one-level air-water heat exchanger and secondary air-water heat exchanger, the preceding set of heat exchange tubes of deduster can suitably be reduced; Cause the heat exchanger dust stratification excessive with regard to effectively to have avoided set of heat exchange tubes too intensive like this, and then increase the problem of flue gas resistance;
And adopt this arrangement, still more than acid dew point, can effectively avoid before the deduster cigarette temperature drop low excessive and cause smoke condensation and then corrosion deduster and air-introduced machine thereafter, flue and booster fan through the flue gas after the heat exchange;
Because first-class heat exchanger only need play corrosion-resistant effect, secondary heat exchanger only need play wear-resisting effect, has reduced cryogenic heat exchanger before the simple employing absorption tower and the corrosion-resistant stainless steel that consumes or the consumption of alloy material, so has saved construction cost greatly.
Employing segmentation heat exchange mode can be managed group setting according to the needs of various heat exchange temperature, has avoided certain duct to arrange the difficult arrangement that too much causes, and the possibility that has reduced the obstruction, dust stratification and the resistance increase that cause owing to pipeline is intensive.
Description of drawings
Fig. 1 is the structural representation that the utility model is provided with direct air cooling system;
Fig. 2 is the structural representation that the utility model is provided with indirect air cooling system;
Fig. 3 is the structural representation that one-level air-water heat exchanger and secondary air-water heat exchanger are connected one-level low-pressure heater two ends;
Fig. 4 is the structural representation that one-level air-water heat exchanger and secondary air-water heat exchanger are connected secondary low-pressure heater two ends;
Fig. 5 is the structural representation that one-level air-water heat exchanger and secondary air-water heat exchanger are connected three grades of low-pressure heater two ends;
Fig. 6 is the curve map of the 2 * 300MW of power plant generator set desulfurization device portal former flue gas cigarette temperature and the average fresh water (FW) consumption of desulphurization system separate unit.
Being labeled as in the accompanying drawing: 1-boiler, 2-tail flue gas treatment system, 3-flue gas waste heat recovery system, 4-air preheater, 5-deduster; The 6-booster fan, 7-absorption tower, 8-steam turbine, 9-low-pressure heater, 10-high-pressure heater; 11-one-level air-water heat exchanger, 12-secondary air-water heat exchanger, 13-air-introduced machine, 14-air-introduced machine outlet damper, the clean flue of 15-; The clean gas baffle of 16-, 17-chimney, 18-superheater, 19-direct air cooling system, 20-condensate pump; The 21-polishing unit that condenses, 22-oxygen-eliminating device, 23-feed pump, 24-generator, 25-one-level low-pressure heater; 26-secondary low-pressure heater, three grades of low-pressure heaters of 27-, 28-force (forcing) pump, 29-indirect air cooling system.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described, but not as the foundation to the utility model restriction.
The embodiment 1 of the utility model: as shown in Figure 1; A kind of multistage condensate heating system; Comprise boiler 1, tail flue gas treatment system 2 and flue gas waste heat recovery system 3; Tail flue gas treatment system 2 comprises air preheater 4, deduster 5, booster fan 6, absorption tower 7, air-introduced machine 13, air-introduced machine outlet damper 14, clean flue 15, clean gas baffle 16 and chimney 17; One end of air-introduced machine 13 is connected with deduster 5, and the other end of air-introduced machine 13 is provided with air-introduced machine outlet damper 14, and air-introduced machine outlet damper 14 is connected with absorption tower 7 through former flue; Absorption tower 7 is connected through the end of clean flue 15 with clean gas baffle 16, and the other end of clean damper 16 is connected with chimney 17; Flue gas waste heat recovery system 3 comprises steam turbine 8, low-pressure heater 9, high-pressure heater 10, superheater 18, direct air cooling system 19, condensate pump 20, the polishing unit 21 that condenses, oxygen-eliminating device 22, feed pump 23 and generator 24; Superheater 18 is located on the pipeline between steam turbine 8 and the boiler 1, and steam turbine 8, direct air cooling system 19, condensate pump 20, the polishing unit 21 that condenses, low-pressure heater 9, oxygen-eliminating device 22, feed pump 23, high-pressure heater 10 are connected in series through pipeline successively; Generator 24 is connected with steam turbine 8; Low-pressure heater 9 comprises one-level low-pressure heater 25, secondary low-pressure heater 26, three grades of low-pressure heaters 27.The steam output end of boiler 1 is connected with steam turbine 8 with air preheater 4 respectively; The condensate input of boiler 1 is connected with high-pressure heater 10; Be provided with one-level air-water heat exchanger 11 in booster fan 6 and the flue that absorption tower 7 is connected, be provided with secondary air-water heat exchanger 12 in air preheater 4 and the flue that deduster 5 is connected.
As shown in Figure 2; The input of one-level air-water heat exchanger 11 is connected with the condensate input of one-level low-pressure heater 25 through pipeline; The output of one-level air-water heat exchanger 11 is connected with the input of secondary air-water heat exchanger 12 through pipeline, and the output of secondary air-water heat exchanger 12 is connected with the condensate output of one-level low-pressure heater 25 through pipeline.
One-level air-water heat exchanger 11 is provided with force (forcing) pump 28 with the connecting line of one-level low-pressure heater 25 condensate inputs.Said one-level air-water heat exchanger 11 is low-level (stack-gas) economizer with secondary air-water heat exchanger 12.The heat-exchanging tube bundle of said one-level air-water heat exchanger 11 adopts corrosion-resistant stainless steel to be made.The finned tube that the heat-exchanging tube bundle of said secondary air-water heat exchanger 12 adopts high-abrasive material to process.
The embodiment 2 of the utility model: as shown in Figure 1; A kind of multistage condensate heating system; Comprise boiler 1, tail flue gas treatment system 2 and flue gas waste heat recovery system 3; Tail flue gas treatment system 2 comprises air preheater 4, deduster 5, booster fan 6, absorption tower 7, air-introduced machine 13, air-introduced machine outlet damper 14, clean flue 15, clean gas baffle 16 and chimney 17; One end of air-introduced machine 13 is connected with deduster 5, and the other end of air-introduced machine 13 is provided with air-introduced machine outlet damper 14, and air-introduced machine outlet damper 14 is connected with absorption tower 7 through former flue; Absorption tower 7 is connected through the end of clean flue 15 with clean gas baffle 16, and the other end of clean damper 16 is connected with chimney 17; Flue gas waste heat recovery system 3 comprises steam turbine 8, low-pressure heater 9, high-pressure heater 10, superheater 18, indirect air cooling system 29, condensate pump 20, the polishing unit 21 that condenses, oxygen-eliminating device 22, feed pump 23 and generator 24; Superheater 18 is located on the pipeline between steam turbine 8 and the boiler 1, and steam turbine 8, indirect air cooling system 29, condensate pump 20, the polishing unit 21 that condenses, low-pressure heater 9, oxygen-eliminating device 22, feed pump 23, high-pressure heater 10 are connected in series through pipeline successively; Generator 24 is connected with steam turbine 8; Low-pressure heater 9 comprises one-level low-pressure heater 25, secondary low-pressure heater 26, three grades of low-pressure heaters 27.The steam output end of boiler 1 is connected with steam turbine 8 with air preheater 4 respectively; The condensate input of boiler 1 is connected with high-pressure heater 10; Be provided with one-level air-water heat exchanger 11 in booster fan 6 and the flue that absorption tower 7 is connected, be provided with secondary air-water heat exchanger 12 in air preheater 4 and the flue that deduster 5 is connected.
As shown in Figure 3; The input of one-level air-water heat exchanger 11 is connected with the condensate input of secondary low-pressure heater 26 through pipeline; The output of one-level air-water heat exchanger 11 is connected with the input of secondary air-water heat exchanger 12 through pipeline, and the output of secondary air-water heat exchanger 12 is connected with the condensate output of secondary low-pressure heater 26 through pipeline.
One-level air-water heat exchanger 11 is provided with force (forcing) pump 28 with the connecting line of secondary low-pressure heater 26 condensate inputs.Said one-level air-water heat exchanger 11 is low-level (stack-gas) economizer with secondary air-water heat exchanger 12.The heat-exchanging tube bundle of said one-level air-water heat exchanger 11 adopts the nickel-base alloy steel to form.The finned tube that the heat-exchanging tube bundle of said secondary air-water heat exchanger 12 adopts high-abrasive material to process.
The embodiment 3 of the utility model: as shown in Figure 1; A kind of multistage condensate heating system; Comprise boiler 1, tail flue gas treatment system 2 and flue gas waste heat recovery system 3; Tail flue gas treatment system 2 comprises air preheater 4, deduster 5, booster fan 6, absorption tower 7, air-introduced machine 13, air-introduced machine outlet damper 14, clean flue 15, clean gas baffle 16 and chimney 17; One end of air-introduced machine 13 is connected with deduster 5, and the other end of air-introduced machine 13 is provided with air-introduced machine outlet damper 14, and air-introduced machine outlet damper 14 is connected with absorption tower 7 through former flue; Absorption tower 7 is connected through the end of clean flue 15 with clean gas baffle 16, and the other end of clean damper 16 is connected with chimney 17; Flue gas waste heat recovery system 3 comprises steam turbine 8, low-pressure heater 9, high-pressure heater 10, superheater 18, direct air cooling system 19, condensate pump 20, the polishing unit 21 that condenses, oxygen-eliminating device 22, feed pump 23 and generator 24; Superheater 18 is located on the pipeline between steam turbine 8 and the boiler 1, and steam turbine 8, direct air cooling system 19, condensate pump 20, the polishing unit 21 that condenses, low-pressure heater 9, oxygen-eliminating device 22, feed pump 23, high-pressure heater 10 are connected in series through pipeline successively; Generator 24 is connected with steam turbine 8; Low-pressure heater 9 comprises one-level low-pressure heater 25, secondary low-pressure heater 26, three grades of low-pressure heaters 27.The steam output end of boiler 1 is connected with steam turbine 8 with air preheater 4 respectively; The condensate input of boiler 1 is connected with high-pressure heater 10; Be provided with one-level air-water heat exchanger 11 in booster fan 6 and the flue that absorption tower 7 is connected, be provided with secondary air-water heat exchanger 12 in air preheater 4 and the flue that deduster 5 is connected.
As shown in Figure 4; The input of one-level air-water heat exchanger 11 is connected with the condensate input of three grades of low-pressure heaters 27 through pipeline; The output of one-level air-water heat exchanger 11 is connected with the input of secondary air-water heat exchanger 12 through pipeline, and the output of secondary air-water heat exchanger 12 is connected with the condensate output of three grades of low-pressure heaters 27 through pipeline.
The connecting line of one-level air-water heat exchanger 11 and three grades of low-pressure heater 27 condensate inputs is provided with force (forcing) pump 28.Said one-level air-water heat exchanger 11 is low-level (stack-gas) economizer with secondary air-water heat exchanger 12.The heat-exchanging tube bundle of said one-level air-water heat exchanger 11 adopts the corrosion-resistant stainless steel of the above grade of 316L to be made.The finned tube that the heat-exchanging tube bundle of said secondary air-water heat exchanger 12 adopts the chromising carbon steel to process.
The scope of application for the utility model; Comprise that not only the system in this paper accompanying drawing constitutes, the system that turbine discharge cools off all is suitable for for the flue gas system, employing direct cooling system or the indirect cooling system that have tail flue gas bypath system, air-introduced machine and booster fan merging setting.
In sum, the just several kinds of preferable specific embodiments of the utility model described in this specification, above embodiment are only unrestricted in order to the technical scheme of explanation the utility model.All technical staff in the art according to the design of the utility model on the basis of existing technology through the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be within the claim protection domain of the utility model.
The operation principle of the utility model: the exhaust steam that steam turbine 8 is discharged forms condensate through behind the condensation heat transfer, delivers to the polishing unit 21 that condenses by condensate pump 20.Condensate after treatment, a part are delivered to low-pressure heater system 9 and are carried out heat again, and a part is delivered to one-level air-water heat exchanger 11 by force (forcing) pump 28 by the road, and the waste heat that absorbs booster fan 6 outlet flue gases carries out the one-level heat exchange.Condensate after the heat exchange is delivered to secondary air-water heat exchanger 12 by the road and is carried out the secondary heat exchange, further absorbs the waste heat of air preheater 4 outlet flue gases.By the condensate after 12 heating of secondary air-water heat exchanger; Deliver to low-pressure heater 9 outlets from pipeline, send into oxygen-eliminating device 22 deoxygenations after converging with the main condensate pipeline, boost by feed pump 23 again after high-pressure heater 10 further pressurizes; Be delivered to boiler 1, as the feedwater of boiler.
Claims (9)
1. multistage condensate heating system; Comprise boiler (1), tail flue gas treatment system (2) and flue gas waste heat recovery system (3); Tail flue gas treatment system (2) comprises air preheater (4), deduster (5), booster fan (6) and absorption tower (7), and flue gas waste heat recovery system (3) comprises steam turbine (8), low-pressure heater (9), high-pressure heater (10); The steam output end of boiler (1) is connected with steam turbine (8) with air preheater (4) respectively; The condensate input of boiler (1) is connected with high-pressure heater (10); It is characterized in that: be provided with one-level air-water heat exchanger (11) in booster fan (6) and the flue that absorption tower (7) are connected; Be provided with secondary air-water heat exchanger (12) in air preheater (4) and the flue that deduster (5) is connected; The input of one-level air-water heat exchanger (11) is connected with the condensate input of low-pressure heater (9) through pipeline; The output of one-level air-water heat exchanger (11) is connected with the input of secondary air-water heat exchanger (12) through pipeline, and the output of secondary air-water heat exchanger (12) is connected with the condensate output of low-pressure heater (9) through pipeline.
2. a kind of multistage condensate heating system according to claim 1; It is characterized in that: said tail flue gas treatment system (2) also comprises air-introduced machine (13), air-introduced machine outlet damper (14), clean flue (15), clean gas baffle (16) and chimney (17); One end of air-introduced machine (13) is connected with deduster (5); The other end of air-introduced machine (13) is provided with air-introduced machine outlet damper (14); Air-introduced machine outlet damper (14) is connected with absorption tower (7) through former flue, and absorption tower (7) are connected through the end of clean flue (15) with clean gas baffle (16), and the other end of clean damper (16) is connected with chimney (17).
3. a kind of multistage condensate heating system according to claim 1; It is characterized in that: flue gas waste heat recovery system (3) also comprises superheater (18), air cooling system, condensate pump (20), the polishing unit that condenses (21), oxygen-eliminating device (22), feed pump (23) and generator (24); Superheater (18) is located on the pipeline between steam turbine (8) and the boiler (1), and steam turbine (8), air cooling system, condensate pump (20), the polishing unit that condenses (21), low-pressure heater (9), oxygen-eliminating device (22), feed pump (23), high-pressure heater (10) are connected in series through pipeline successively; Generator (24) is connected with steam turbine (8).
4. a kind of multistage condensate heating system according to claim 3 is characterized in that: said air cooling system adopts direct air cooling system (19) or indirect air cooling system (29).
5. a kind of multistage condensate heating system according to claim 1; It is characterized in that: said low-pressure heater (9) comprises one-level low-pressure heater (25), secondary low-pressure heater (26), three grades of low-pressure heaters (27); The input of one-level air-water heat exchanger (11) is connected through the condensate input of pipeline with any one-level low-pressure heater, and the output of secondary air-water heat exchanger (12) is connected with the condensate output of this grade low-pressure heater through pipeline.
6. a kind of multistage condensate heating system according to claim 5 is characterized in that: one-level air-water heat exchanger (11) is provided with force (forcing) pump (28) with the connecting line of low-pressure heater (9) condensate input.
7. a kind of multistage condensate heating system according to claim 6 is characterized in that: said one-level air-water heat exchanger (11) and secondary air-water heat exchanger (12) are low-level (stack-gas) economizer.
8. a kind of multistage condensate heating system according to claim 7 is characterized in that: the heat-exchanging tube bundle of said one-level air-water heat exchanger (11) adopts corrosion-resistant stainless steel or nickel-base alloy steel to form.
9. a kind of multistage condensate heating system according to claim 7 is characterized in that: the finned tube that the heat-exchanging tube bundle of said secondary air-water heat exchanger (12) adopts high-abrasive material to process.
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| CN2011203865804U CN202303337U (en) | 2011-10-12 | 2011-10-12 | Multilevel condensation water heating system |
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| CN2011203865804U CN202303337U (en) | 2011-10-12 | 2011-10-12 | Multilevel condensation water heating system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102759096A (en) * | 2012-07-24 | 2012-10-31 | 西安交通大学 | Smoke waste heat utilization system |
| CN103047642A (en) * | 2011-10-12 | 2013-04-17 | 沈兴财 | Multilevel condensation water heating system |
| CN104075745A (en) * | 2013-03-27 | 2014-10-01 | 上海赫特能源科技有限公司 | Boiler combustion test furnace |
| CN104235826A (en) * | 2013-06-13 | 2014-12-24 | 烟台龙源电力技术股份有限公司 | Boiler flue gas waste heat recycling system |
| CN106123001A (en) * | 2016-06-24 | 2016-11-16 | 福建龙净环保股份有限公司 | A kind of smoke waste heat utilization system and method |
| CN110966618A (en) * | 2019-12-26 | 2020-04-07 | 杭州新世纪能源环保工程股份有限公司 | Steam and flue gas heat exchange device adopting three-stage heat exchange |
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2011
- 2011-10-12 CN CN2011203865804U patent/CN202303337U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047642A (en) * | 2011-10-12 | 2013-04-17 | 沈兴财 | Multilevel condensation water heating system |
| CN102759096A (en) * | 2012-07-24 | 2012-10-31 | 西安交通大学 | Smoke waste heat utilization system |
| CN102759096B (en) * | 2012-07-24 | 2015-01-07 | 西安交通大学 | Smoke waste heat utilization system |
| CN104075745A (en) * | 2013-03-27 | 2014-10-01 | 上海赫特能源科技有限公司 | Boiler combustion test furnace |
| CN104235826A (en) * | 2013-06-13 | 2014-12-24 | 烟台龙源电力技术股份有限公司 | Boiler flue gas waste heat recycling system |
| CN106123001A (en) * | 2016-06-24 | 2016-11-16 | 福建龙净环保股份有限公司 | A kind of smoke waste heat utilization system and method |
| CN110966618A (en) * | 2019-12-26 | 2020-04-07 | 杭州新世纪能源环保工程股份有限公司 | Steam and flue gas heat exchange device adopting three-stage heat exchange |
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