CN212361988U - Flue gas waste heat utilization system - Google Patents
Flue gas waste heat utilization system Download PDFInfo
- Publication number
- CN212361988U CN212361988U CN202021650975.6U CN202021650975U CN212361988U CN 212361988 U CN212361988 U CN 212361988U CN 202021650975 U CN202021650975 U CN 202021650975U CN 212361988 U CN212361988 U CN 212361988U
- Authority
- CN
- China
- Prior art keywords
- condensed water
- flue gas
- communicated
- water inlet
- waste heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000003546 flue gas Substances 0.000 title claims abstract description 120
- 239000002918 waste heat Substances 0.000 title claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 180
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 238000004064 recycling Methods 0.000 claims description 4
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 description 10
- 238000011084 recovery Methods 0.000 description 7
- 239000003245 coal Substances 0.000 description 5
- 230000003009 desulfurizing effect Effects 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 239000012717 electrostatic precipitator Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model discloses a flue gas waste heat utilization system, which belongs to the field of energy conservation and emission reduction of thermal power generating units, and a flue gas cooler of the flue gas waste heat utilization system is provided with a condensed water inlet a1 and a condensed water outlet a2 which are communicated; the water inlet end of the condensed water inlet pipeline is communicated with the low-pressure heater pipeline, the water outlet end of the condensed water inlet pipeline is communicated with a condensed water inlet a1, the water inlet end of the condensed water return pipeline is communicated with a condensed water outlet a2, and the water outlet end of the condensed water return pipeline is communicated with the low-pressure heater pipeline; the air heater is provided with a condensed water inlet b1 and a condensed water outlet b2 which are communicated, and a cold air inlet and a hot air outlet which are communicated, wherein the condensed water inlet b1 is communicated with the condensed water outlet a2, and the condensed water outlet b2 is communicated with a condensed water return pipeline; the cold air inlet is communicated with the air feeder, and the hot air outlet is communicated with the air preheater. The flue gas waste heat utilization system realizes the cascade utilization of the flue gas waste heat of the boiler, and the heat efficiency of the boiler is improved; meanwhile, the over-temperature of hot air at the hot air outlet of the air heater can be prevented.
Description
Technical Field
The utility model relates to a thermal power generating unit energy saving and emission reduction technical field especially relates to a flue gas waste heat utilization system.
Background
In the thermal power plant in China, 70-80% of the total heat loss of the boiler is the heat loss of the exhaust smoke. When the exhaust gas temperature rises by 10-15 ℃, the boiler efficiency is reduced by 1%, and the annual average standard coal consumption rises by 3-4 g/(kW.h). Along with the stricter policy of energy conservation and emission reduction and the continuous rising of energy price, the importance of reasonably utilizing the waste heat of the boiler flue gas is increasing.
The most common mode in the traditional flue gas waste heat utilization modes is that a low-temperature economizer is arranged in a tail flue behind an air preheater, and the flue gas waste heat is utilized to heat condensed water in a regenerative system so as to reduce the steam extraction amount of the regenerative system; the saved extracted steam enters a subsequent steam turbine to continue to expand to work, and the total work output of the steam turbine is increased, so that the economy of the whole unit is improved.
The above flue gas waste heat utilization scheme mainly has the following disadvantages:
(1) the flue gas waste heat absorbed by the primary waste heat utilization system is directly used for heating flue gas at the inlet of a chimney, so that energy waste is caused.
(2) In summer, the exhaust gas temperature of the boiler is high, the recovery heat of the secondary flue gas waste heat recovery system is increased, and the hot air in the outlet of the air heater is easily over-heated.
(3) The flue gas waste heat recovered by the low-temperature economizer only heats condensed water, the flue gas waste heat is not utilized in a gradient manner, and the waste heat utilization rate is low.
Therefore, it is necessary to provide a flue gas waste heat utilization system to solve the above technical problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flue gas waste heat utilization system can realize the step utilization of flue gas waste heat, and energy utilization is rateed highly, and can avoid the hot-blast overtemperature of fan heater export.
In order to achieve the above object, the utility model adopts the following technical scheme:
a flue gas waste heat utilization system comprises a blower, an air preheater, a low-pressure heater group, a condensed water inlet pipeline, a condensed water return pipeline, a flue gas cooler, a fan heater and a flue gas treatment device;
the low-pressure heater group comprises a plurality of low-pressure heaters which are sequentially communicated through low-pressure heater pipelines; the water inlet end of the low-pressure heater pipeline is communicated with a condensed water source, and the water outlet end of the low-pressure heater pipeline is communicated with a deaerator;
the flue gas cooler is provided with a condensed water inlet a1 and a condensed water outlet a2 which are communicated with each other, and a flue gas inlet and a flue gas outlet which are communicated with each other; the water inlet end of the condensed water inlet pipeline is communicated with the low-pressure heater pipeline, the water outlet end of the condensed water inlet pipeline is communicated with the condensed water inlet a1, the water inlet end of the condensed water return pipeline is communicated with the condensed water outlet a2, and the water outlet end of the condensed water return pipeline is communicated with the low-pressure heater pipeline; the flue gas inlet is communicated with the air preheater, and the flue gas outlet is communicated with the flue gas treatment device;
the air heater is provided with a condensed water inlet b1 and a condensed water outlet b2 which are communicated with each other, and a cold air inlet and a hot air outlet which are communicated with each other, wherein the condensed water inlet b1 is communicated with the condensed water outlet a2, and the condensed water outlet b2 is communicated with the condensed water return pipeline; the cold air inlet is communicated with the air feeder, and the hot air outlet is communicated with the air preheater.
As an optimal technical scheme of the above flue gas waste heat utilization system, the flue gas waste heat utilization system further includes:
and the condensed water inlet regulating valve is arranged in the condensed water inlet pipeline.
As an optimal technical scheme of the above flue gas waste heat utilization system, the flue gas waste heat utilization system further includes:
and the water inlet end of the hot water recycling loop is communicated with the condensed water return pipeline, and the water outlet end of the hot water recycling loop is communicated with the condensed water inlet pipeline.
As an optimal technical scheme of the above flue gas waste heat utilization system, the flue gas waste heat utilization system further includes:
a recirculation regulating valve disposed in the hot water recirculation loop.
As an optimal technical scheme of the above flue gas waste heat utilization system, the flue gas waste heat utilization system further includes:
and the condensate return water regulating valve is arranged in the condensate return water pipeline.
As an optimal technical scheme of the above flue gas waste heat utilization system, the flue gas waste heat utilization system further includes:
and the variable-frequency booster water pump is arranged in the condensed water inlet pipeline.
As the preferable technical scheme of the flue gas waste heat utilization system, the flue gas cooler is a fin tube type heat exchanger which is arranged in a countercurrent mode.
As the preferable technical scheme of the flue gas waste heat utilization system, the air heater is a spiral fin tube type heat exchanger which is arranged in a countercurrent mode.
As the preferable technical scheme of the flue gas waste heat utilization system, the flue gas temperature of the flue gas outlet of the flue gas cooler is 90-100 ℃, and the flue gas resistance is 100-800 Pa.
As the preferable technical scheme of the flue gas waste heat utilization system, the air temperature of the hot air outlet of the air heater is 50-90 ℃, and the air resistance is 100-800 Pa.
Compared with the prior art, the beneficial effects of the utility model are that:
the flue gas waste heat utilization system provided by the utility model can realize the effective utilization of the boiler flue gas waste heat step by coordinating the waste heat, the heat recovery and the air heater system, compared with the conventional power station boiler system, the flue gas waste heat utilization system has the advantages that the boiler heat efficiency is improved, and the energy is efficiently utilized; meanwhile, the flue gas waste heat utilization system heats the condensed water through the flue gas cooler, the condensed water after temperature rise enters the primary air or the secondary air introduced by the heating air supply fan in the air heater, the hot air at the hot air outlet of the air heater can be effectively prevented from being over-heated, and the defect that the occupied area of the air preheater is too large and difficult to arrange when the conventional recovery smoke exhaust system heats the hot air can be avoided.
Drawings
Fig. 1 is a schematic view of a flue gas waste heat utilization system provided by the specific embodiment of the present invention.
In the figure:
1. a blower; 2. an air preheater; 3. a flue gas cooler; 4. a warm air blower; 5. a condensed water inlet regulating valve; 6. a recirculation regulating valve; 7. a condensate return water regulating valve; 8. a variable-frequency booster water pump; 9. a first low pressure heater; 10. a second low pressure heater; 11. a third low pressure heater; 12. a fourth low pressure heater; 13. an electrostatic precipitator; 14. an induced draft fan; 15. a desulfurizing tower; 16. a coal economizer;
100. a condensed water inlet pipeline; 101. a first water inlet branch; 102. a second water inlet branch; 200. a condensed water return pipeline; 300. a low pressure heater line; 400. a hot water recirculation loop.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, the embodiment discloses a flue gas waste heat utilization system for coordinating waste heat, heat regeneration and a fan heater system, which can effectively reduce coal consumption of a coal-fired power generating set, improve boiler efficiency and realize efficient utilization of energy. Meanwhile, the flue gas waste heat utilization system can effectively prevent the hot air at the hot air outlet of the air heater 4 from being over-heated, and can also avoid the defect that the occupied area of the air preheater 2 is too large and difficult to arrange when the conventional recovery smoke exhaust system heats hot air. The flue gas waste heat utilization system mainly comprises a blower 1, an air preheater 2, a low-pressure heater group, a condensed water inlet pipeline 100, a condensed water return pipeline 200, a flue gas cooler 3, a fan heater 4 and a flue gas treatment device.
Specifically, the low pressure heater group includes a plurality of low pressure heaters, which are sequentially communicated through a low pressure heater pipe 300; the inlet end of the lp heater circuit 300 (shown as a in fig. 1) is connected to an external source of condensed water (not shown), and the outlet end of the lp heater circuit 300 (shown as B in fig. 1) is connected to an external deaerator (not shown). Optionally, in the direction from the water inlet end to the water outlet end of the low pressure heater pipeline 300, the low pressure heater group includes four low pressure heaters, namely a first low pressure heater 9, a second low pressure heater 10, a third low pressure heater 11 and a fourth low pressure heater 12, an inlet of the first low pressure heater 9 is communicated with the condensed water source, and an outlet of the fourth low pressure heater 12 is communicated with the deaerator. It is understood that the number of the low pressure heaters included in the low pressure heater group can be designed according to actual working conditions.
The flue gas cooler 3 is provided with a condensed water inlet a1 and a condensed water outlet a2 which are communicated with each other, wherein the water inlet end of the condensed water inlet pipeline 100 is communicated with the low-pressure heater pipeline 300, the water outlet end of the condensed water inlet pipeline 100 is communicated with the condensed water inlet a1, the water inlet end of the condensed water return pipeline 200 is communicated with the condensed water outlet a2, and the water outlet end of the condensed water return pipeline 200 is communicated with the low-pressure heater pipeline 300. Optionally, the branch road of intaking is equipped with two branches of intaking in the department of the end of intaking of condensate water inlet pipe 100, and be first branch road 101 and the branch road 102 of intaking respectively, wherein, first branch road 101 of intaking communicates in first low pressure feed water heater 9's entrance, and the branch road 102 of intaking of second communicates in second low pressure feed water heater 10's exit, under this structure for the condensate water of two different temperatures gets into condensate water inlet pipe 100 after mixing, guarantees that the temperature of mixing the condensate water satisfies the entry temperature requirement of gas cooler 3. It will be appreciated that the number of water inlet branches and the location of the communication on the lp heater tube 300 may be designed according to the actual operating conditions. The water outlet end of the condensed water return pipeline 200 is communicated with the inlet of the fourth low-pressure heater 12.
Further, the flue gas cooler 3 is also provided with a flue gas inlet and a flue gas outlet which are communicated with each other. The flue gas inlet is communicated with the air preheater 2, and the flue gas outlet is communicated with the flue gas treatment device. Under the structure, the condensed water introduced by the condensed water inlet pipeline 100 and the high-temperature flue gas discharged from the smoke outlet of the air preheater 2 exchange heat in the flue gas cooler 3, the temperature of the condensed water rises after absorbing the waste heat of the high-temperature flue gas, the temperature of the high-temperature flue gas is reduced, and a part of the condensed water after temperature rise returns to the inlet of the fourth low-pressure heater 12 through the condensed water return pipeline 200, so that the steam extraction amount of the low-pressure heater group is reduced, and the working capacity of the steam turbine is improved.
The air heater 4 is provided with a condensed water inlet b1 and a condensed water outlet b2 which are communicated with each other, and a cold air inlet and a hot air outlet which are communicated with each other. The condensed water inlet b1 is communicated with the condensed water outlet a2 through a pipeline, and the condensed water outlet b2 is communicated with the condensed water return pipeline 200 through a pipeline; the cold air inlet is communicated with the blower 1, and the hot air outlet is communicated with the air preheater 2. Under this structure, another part of condensate water after the intensification carries out heat exchange in air heater 4 with the cold wind that introduces from forced draught blower 1, and cold wind gets into air heater 2 through hot air outlet after the heat absorption, has improved the cold wind temperature that gets into air heater 2, has reduced the high-quality steam extraction volume of the original air heater system of power plant to reduce the electricity generation coal consumption of unit. It should be noted that the blower 1 may introduce primary air or secondary air.
In the present embodiment, the flue gas cooler 3 is a finned tube heat exchanger arranged in counterflow. The flue gas temperature at the flue gas outlet of the flue gas cooler 3 is designed to be 90-100 ℃, and the flue gas resistance is designed to be 100-800 Pa.
The air heater 4 is a spiral fin tube heat exchanger arranged in a countercurrent mode. The air temperature at the hot air outlet of the air heater 4 is designed to be 50-90 ℃, and the air resistance is designed to be 100-800 Pa.
Further, the flue gas waste heat utilization system further comprises a variable-frequency booster water pump 8 arranged in the condensed water inlet pipeline 100. The frequency conversion booster water pump 8 provides power for the whole condensate system, and meanwhile, when the unit load changes greatly, the frequency conversion booster water pump 8 is used for regulating and controlling the condensate quantity in a frequency conversion mode, so that the outlet smoke temperature at the smoke outlet of the smoke cooler 3 is ensured to be in the design range, and the water temperature at the condensate outlet a2 of the smoke cooler 3 is ensured to meet the requirements of the air heater 4 and the heat recovery system.
In order to prevent the low-temperature corrosion of the flue gas cooler 3, the inlet water temperature at the condensed water inlet a1 of the flue gas cooler 3 is required to be not lower than the minimum required wall temperature, the flue gas waste heat utilization system further comprises a condensed water inlet regulating valve 5, and the condensed water inlet regulating valve 5 is arranged in the condensed water inlet pipeline 100. The automatic control of the inlet water temperature of the flue gas cooler 3 is realized by regulating and controlling the opening of the condensed water inlet regulating valve 5. Optionally, the inlet water temperature at the condensed water inlet a1 of the flue gas cooler 3 is designed to be 60-80 ℃, which is beneficial for preventing the flue gas cooler 3 from low-temperature corrosion. Preferably, a condensate inlet regulating valve 5 is provided in the first inlet branch 101.
Further, in order to prevent the outlet water temperature of the second low-pressure heater 10 from being too low when the unit is in low-load operation and the water temperature requirement at the inlet of the flue gas cooler 3 cannot be met only by adjusting the opening degree of the condensed water inlet adjusting valve 5, the flue gas waste heat utilization system further comprises a hot water recirculation loop 400, the water inlet end of the hot water recirculation loop 400 is communicated with the condensed water return pipeline 200, and the water outlet end of the hot water recirculation loop 400 is communicated with the condensed water inlet pipeline 100, preferably the upstream of the variable-frequency booster water pump 8. The hot water recirculation loop 400 is provided with the recirculation regulating valve 6, and a part of high-temperature condensed water return water can be introduced into the condensed water inlet pipeline 100 by regulating the opening degree of the recirculation regulating valve 6, and is mixed with the low-temperature condensed water to enter the flue gas cooler 3, so that the inlet water temperature of the flue gas cooler 3 is increased, and the low-temperature corrosion phenomenon is further avoided.
In order to prevent overhigh exhaust gas temperature of the boiler under working conditions in summer, which causes overhigh water temperature at the outlet of the flue gas cooler 3 and indirectly causes overtemperature early warning of the air temperature at the outlet of the air heater 4, the flue gas waste heat utilization system in the embodiment is additionally provided with a condensate return water regulating valve 7 in a condensate return water pipeline 200. The water amount of the high-temperature condensed water entering the air heater 4 is adjusted by adjusting the opening degree of the condensed water return adjusting valve 7, so that the temperature of hot air at a hot air outlet of the air heater 4 is not over-heated; meanwhile, the hot air temperature of the air heater 4 can be prevented from being too low to meet the operation requirement when the unit operates at low load.
The flue gas treatment device in this embodiment is a desulfurizing tower 15, an electrostatic precipitator 13 and an induced draft fan 14 are further disposed between the flue gas outlet of the flue gas cooler 3 and the desulfurizing tower 15, and optionally, the flue gas cooler 3 may be disposed in a flue upstream of the electrostatic precipitator 13, or may be disposed in a flue between the induced draft fan 14 and the desulfurizing tower 15. Further, an economizer 16 is arranged at the downstream of the smoke outlet of the air preheater 2. It should be noted that the structures of the air preheater 2, the economizer 16, the electrostatic precipitator 13, the desulfurizing tower 15, and the like in the present embodiment are conventional structures in the prior art, and the present embodiment does not specifically describe the specific structures and the working principles thereof.
The flue gas waste heat utilization system provided by the embodiment respectively heats condensed water and primary air/secondary air by recovering the waste heat of high-temperature flue gas discharged by the air preheater 2, so that the steam extraction amount of the low-pressure heater group and the steam extraction amount of the heater 4 are reduced, and the coal consumption of a unit is further reduced; the flue gas waste heat utilization system is good in regulation performance, strong in adaptability, simple in structure and high in reliability, can meet requirements when the working condition and the ambient temperature change are large, can avoid the defect that the occupied area of the air preheater 2 is too large to be arranged when the conventional recovery smoke exhaust system heats hot air, and meanwhile realizes deep gradient utilization of the flue gas waste heat of the boiler and improves the boiler efficiency.
The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A flue gas waste heat utilization system is characterized by comprising a blower (1), an air preheater (2), a low-pressure heater group, a condensed water inlet pipeline (100), a condensed water return pipeline (200), a flue gas cooler (3), a fan heater (4) and a flue gas treatment device;
the low-pressure heater group comprises a plurality of low-pressure heaters which are sequentially communicated through low-pressure heater pipelines (300); the water inlet end of the low-pressure heater pipeline (300) is communicated with a condensed water source, and the water outlet end of the low-pressure heater pipeline (300) is communicated with a deaerator;
the flue gas cooler (3) is provided with a condensed water inlet a1 and a condensed water outlet a2 which are communicated with each other, and a flue gas inlet and a flue gas outlet which are communicated with each other; the water inlet end of the condensed water inlet pipeline (100) is communicated with the low-pressure heater pipeline (300), the water outlet end of the condensed water inlet pipeline (100) is communicated with the condensed water inlet a1, the water inlet end of the condensed water return pipeline (200) is communicated with the condensed water outlet a2, and the water outlet end of the condensed water return pipeline (200) is communicated with the low-pressure heater pipeline (300); the flue gas inlet is communicated with the air preheater (2), and the flue gas outlet is communicated with the flue gas treatment device;
the air heater (4) is provided with a condensed water inlet b1 and a condensed water outlet b2 which are communicated with each other, and a cold air inlet and a hot air outlet which are communicated with each other, wherein the condensed water inlet b1 is communicated with the condensed water outlet a2, and the condensed water outlet b2 is communicated with the condensed water return pipeline (200); the cold air inlet is communicated with the air feeder (1), and the hot air outlet is communicated with the air preheater (2).
2. The flue gas waste heat utilization system according to claim 1, further comprising:
the condensed water inlet adjusting valve (5), the condensed water inlet adjusting valve (5) is arranged in the condensed water inlet pipeline (100).
3. The flue gas waste heat utilization system according to claim 1, further comprising:
the water inlet end of the hot water recycling loop (400) is communicated with the condensed water return pipeline (200), and the water outlet end of the hot water recycling loop (400) is communicated with the condensed water inlet pipeline (100).
4. The flue gas waste heat utilization system according to claim 3, further comprising:
a recirculation regulating valve (6) disposed in the hot water recirculation loop (400).
5. The flue gas waste heat utilization system according to claim 1, further comprising:
and the condensed water return regulating valve (7) is arranged in the condensed water return pipeline (200).
6. The flue gas waste heat utilization system according to claim 1, further comprising:
and the variable-frequency booster water pump (8) is arranged in the condensed water inlet pipeline (100).
7. The flue gas waste heat utilization system according to claim 1,
the flue gas cooler (3) is a fin tube type heat exchanger arranged in a countercurrent mode.
8. The flue gas waste heat utilization system according to claim 1,
the air heater (4) is a spiral fin tube type heat exchanger which is arranged in a countercurrent mode.
9. The flue gas waste heat utilization system according to claim 1,
the flue gas temperature of the flue gas outlet of the flue gas cooler (3) is 90-100 ℃, and the flue gas resistance is 100-800 Pa.
10. The flue gas waste heat utilization system according to claim 1,
the air temperature of the hot air outlet of the air heater (4) is 50-90 ℃, and the air resistance is 100-800 Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021650975.6U CN212361988U (en) | 2020-08-10 | 2020-08-10 | Flue gas waste heat utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021650975.6U CN212361988U (en) | 2020-08-10 | 2020-08-10 | Flue gas waste heat utilization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212361988U true CN212361988U (en) | 2021-01-15 |
Family
ID=74132375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021650975.6U Active CN212361988U (en) | 2020-08-10 | 2020-08-10 | Flue gas waste heat utilization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212361988U (en) |
-
2020
- 2020-08-10 CN CN202021650975.6U patent/CN212361988U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202432505U (en) | Flue gas waste heat recovery utilization system of coal burning boiler | |
| CN201764527U (en) | Thermal power plant boiler flue gas waste heat recovery and utilization system | |
| CN111981465A (en) | Flue gas waste heat utilization system | |
| CN104456611A (en) | Composite utilization system for waste heat of exhaust fume of boiler | |
| CN102401393B (en) | Exhaust waste heat recycling system of power plant boiler | |
| CN107149873B (en) | Energy-saving full-load denitration system | |
| CN105180146A (en) | Multi-stage smoke waste heat recovery and comprehensive utilization system for combined heat and power plant | |
| CN107366897B (en) | A kind of Pollutant in Coal Burning Boiler emission reduction optimization collaboration fume afterheat deep exploitation system | |
| CN201779684U (en) | High-grade recycling system for exhaust heat of power station boiler | |
| CN102494329B (en) | Device for utilizing flue gas waste heat of boiler comprehensively | |
| CN100520268C (en) | Fume-fume hot pipe heater exchanger for fume desulphurization in heat-engine plant | |
| CN105020737A (en) | System for improving safety of air pre-heater by utilizing spiral-fin type heat exchanger | |
| CN210568552U (en) | Boiler energy-saving and flue gas whitening system | |
| CN204574092U (en) | Boiler tail flue gas waste heat complicated utilization system | |
| CN204756887U (en) | High -efficient hot media water system of circulating fluidized bed boiler | |
| CN202203970U (en) | Secondary energy saving and utilizing device for furnace exhaust gas waste heat | |
| CN201866755U (en) | Flue gas waste heat recovery system for boiler in thermal power plant | |
| CN204665244U (en) | A kind of association system of phase-change heat-exchanger band heat exchangers for district heating | |
| CN212361988U (en) | Flue gas waste heat utilization system | |
| CN104235825A (en) | Boiler flue gas waste heat recycling system | |
| CN214745984U (en) | Heating system with secondary low-temperature economizer | |
| CN204962712U (en) | System is used multipurposely in multistage recovery of cogeneration of heat and power power plant flue gas waste heat | |
| CN104832908A (en) | Combination system and combination method for phase-change heat exchanger with heating network heater | |
| CN209196907U (en) | Air preheater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization | |
| CN210014388U (en) | Deep recycling cascade utilization system for low-temperature flue gas waste heat of coal-fired unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |