CN104456611A - Composite utilization system for waste heat of exhaust fume of boiler - Google Patents
Composite utilization system for waste heat of exhaust fume of boiler Download PDFInfo
- Publication number
- CN104456611A CN104456611A CN201410730414.XA CN201410730414A CN104456611A CN 104456611 A CN104456611 A CN 104456611A CN 201410730414 A CN201410730414 A CN 201410730414A CN 104456611 A CN104456611 A CN 104456611A
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- CN
- China
- Prior art keywords
- water
- heat exchanger
- air
- flue gas
- water 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.)
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- 239000002918 waste heat Substances 0.000 title claims abstract description 13
- 239000003517 fume Substances 0.000 title abstract description 7
- 239000002131 composite material Substances 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 3
- 230000023556 desulfurization Effects 0.000 claims abstract 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 26
- 239000003546 flue gas Substances 0.000 claims description 26
- 239000012736 aqueous medium Substances 0.000 claims description 12
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 6
- 230000008021 deposition Effects 0.000 abstract description 6
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical group [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000005494 condensation Effects 0.000 abstract 2
- 238000009833 condensation Methods 0.000 abstract 2
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000010148 water-pollination 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Air Supply (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention provides a composite utilization system for the waste heat of the exhaust fume of a boiler. The system comprises at least one air preheater, at least one fume-water heat exchange coal economizer, at least one air-water heat exchange air heater, and a connecting pipe for connecting the air preheater and the heat exchanger, wherein the fume-water heat exchange coal economizer is arranged behind the air preheater, fume is exhausted after the heat of the fume from an outlet of the air preheater is absorbed through the fume-water heat exchanger, and the waste heat of the fume is utilized to raise the temperature of the cold air and the temperature of the condensation water; the air-water heat exchange air heater is used for heating the cold air through water media. The system has the characteristics that the temperature of the cold air is raised, the deposition of ammonium bisulfate is relieved, the flue exhaust temperature is reduced, the efficiency of the boiler is improved, the condensation water is heated, and the water usage for a desulfurization system is saved.
Description
Technical field
What this programme research related to is a kind of boiler tail flue gas waste heat complicated utilization system, belongs to thermal power plant design field.
Background technology
Current thermal power plant, in order to improve disposal of pollutants present situation, all can install the devices such as denitration additional.After boiler De-NO_x, due to the existence of the escaping of ammonia phenomenon, ammonium hydrogen sulfate deposition just inevitably occurs on air preheater, and longtime running certainly will cause air preheater resistance to increase, blower fan power consumption rate increases, and therefore needing increases air preheater entrance cold wind temperature to reduce the deposition of hydrogen sulfate ammonia.Meanwhile, the requirement that unit is saved energy and reduce the cost improves day by day, improving unit efficiency, utilizing system to have higher requirement to existing boiler tail flue gas for reducing energy consumption further.
Summary of the invention
The object of the invention is to alleviate ammonium hydrogen sulfate deposition, improve unit efficiency, and it is simple to provide a kind of structure to form, run convenient, reliable, both improve air preheater entrance cold wind temperature, and alleviated ammonium hydrogen sulfate deposition, can also exhaust gas temperature be reduced simultaneously, heat-setting water, improves the heat power plant boiler tail flue gas waste heat complicated utilization system of unit efficiency.
The object of the invention is to have come by following technical solution, it comprises: at least one air preheater, at least one flue gas-water heat transfer economizer, at least one air-water heat exchange steam air heater, and by tube connector that described air preheater and heat exchanger link together.
After described gas-water heat exchange province matchmaker device is arranged in air preheater, after the flue gas that air preheater exports economizes the heat absorption of matchmaker's device by gas-water heat exchange, flue gas is discharged.This heat exchanger adopts countercurrent flow pattern, and internal placement has vertical tube heat exchange runner or horizontal tube heat exchange runner.
Described Air-Water heat exchange steam air heater is arranged between air preheater and blower fan, and cold wind (cold wind or secondary cold wind or both combinations, lower with) is heated by Air-Water heat exchange steam air heater.Gas-water heat exchange simultaneously economizes between matchmaker's device and Air-Water heat exchange steam air heater with aqueous medium cycle heat exchange.
In described heat exchanger, aqueous medium comes from steam turbine condensate system, namely pass into gas-water heat exchange to the condensate water of steam turbine grade heater outlet to economize matchmaker's device and flue gas and carry out heat exchange, gas-water heat exchanger exit arranges diffluence pass, major part aqueous medium enters Air-Water heat exchange steam air heater, heat cold wind, another part aqueous medium enters condensate system.
The present invention has following technique effect:
One is improve cold wind temperature, improves boiler efficiency, alleviates ammonium hydrogen sulfate deposition simultaneously.
Two is that the partial heat of flue gas heat-exchange unit is used for heating steam turbine low-pressure heating system, improves the heat-economy of unit, reduces net coal consumption rate.
Three is because flue-gas temperature reduces, and the exhaust gas volumn entering desulfuration absorbing tower reduces, and has saved a large amount of desulphurization system water.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of fume afterheat complicated utilization system of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and each scheme computational analysis contrast, the present invention will be described in detail:
Fume afterheat complicated utilization system side mainly comprises: air preheater (1), flue gas-water heat transfer economizer (2) and air-water heat exchange steam air heater (3) three capital equipment.
After described gas-water heat exchanger (2) is arranged in air preheater (1), after the heat exchange of the flue gas that air preheater (1) exports by gas-water heat exchanger (2), flue gas is discharged.This heat exchanger adopts countercurrent flow pattern, and internal placement has vertical tube heat exchange runner or horizontal tube heat exchange runner.
Described air-water heat exchanger (3) is arranged between air preheater and blower fan, and cold wind is heated by air-water heat exchanger (3).Simultaneously between gas-water heat exchanger (2) and air-water heat exchanger (3) with aqueous medium cycle heat exchange.
In described heat exchanger, aqueous medium comes from the low adding system of steam turbine, namely pass into gas-water heat exchanger (2) to the condensate water of steam turbine grade low-pressure heater outlet to cool flue gas, gas-water heat exchanger (2) water side outlet arranges diffluence pass, major part aqueous medium enters air-water heat exchanger (3), and another part aqueous medium enters condensate system.
Embodiment:
Shown in Fig. 1, present system mainly comprises air preheater (1), flue gas-water heat transfer economizer (2) and air-water heat exchange steam air heater (3) three capital equipment, and mutually between connection.
For certain 1,000,000 power plant, by flue gas-water-to-water heat exchanger (2), absorb the flue gas heat that air preheater (1) exports, exhaust gas temperature is reduced to 90 DEG C from 157 DEG C, and aqueous medium temperature is heated to 120 DEG C from 70 DEG C.120 DEG C of hot water that flue gas-water-to-water heat exchanger (2) exports remove the Secondary Air before heating air preheater (1) entrance again, and Secondary Air is heated to 100 DEG C from 25 DEG C, and after-heat is for heating the condensate water in Steam Turbine Regenerative System.:
For certain 1,000,000 power plant, by primary Calculation, coal consumption of power supply reduces about 2.4g/kw.h than conventional power unit.Run 5500 hours by unit year, the annual coal consumption of every platform unit with saving about 13200 tons, about 1,000 ten thousand yuan.
The present invention is that the program meets the policy requirements of national energy-saving consumption reduction and up-to-date environmental emission standard based on reducing the thinking of coal consumption of power supply and safe operation and the technical scheme that proposes.
The present invention, by air preheater exiting flue gas, by hydrophily heat exchanger, reduces exhaust gas temperature, utilizes the heat of flue gas to improve cold wind temperature, improves boiler efficiency, and heat heat regenerative system condensate water.
Consider the impact of cold end corrosion, flue gas heat-exchange unit housing of the present invention adopts ND steel (09CrCuSb), and side and bottom and flushing water contact portion increase nickel-base alloy liner plate.Heat exchanger tube all adopts ND steel.
Flue gas heat-exchange unit of the present invention is by housing and extended surface tube and form; Condensate water in extended surface tube connects from the low adding system of steam turbine.
Consider the impact of cold end corrosion, described gas-water heat exchange equipment, air-water heat exchanger equipment key part and need corrosion protection design.
Claims (7)
1. a boiler tail flue gas waste heat complicated utilization system, it comprises: at least one air preheater, at least one flue gas-water heat transfer economizer, at least one air-water heat exchange steam air heater, and by tube connector that described air preheater and heat exchanger link together.
2. boiler tail flue gas waste heat complicated utilization system according to claim 1, it is characterized in that described air preheater (1) outlet arranges gas-water heat exchanger (2), condensate water absorbs flue gas heat by heat exchanger, discharges after reducing flue-gas temperature.
3. boiler tail flue gas waste heat complicated utilization system according to claim 1, is characterized in that part aqueous medium that described air-water heat exchanger (3) exported by gas-water heat exchanger (2) heats cold wind (cold wind or secondary cold wind or both combinations).
4. boiler tail flue gas waste heat complicated utilization system according to claim 1, it is characterized in that described gas-water heat exchanger (2) and air-water heat exchanger (3) adopt countercurrent flow pattern, internal placement has vertical tube heat exchange runner or horizontal tube heat exchange runner.
5. boiler tail flue gas waste heat complicated utilization system according to claim 1, is characterized in that the aqueous medium passed through in described gas-water heat exchanger (2) comes from steam turbine condensate system.
6. boiler tail flue gas waste heat complicated utilization system according to claim 1, is characterized in that the part aqueous medium heating heat regenerative system condensate water that described air-water heat exchanger (3) is exported by gas-water heat exchanger (2).
7. boiler tail flue gas waste heat complicated utilization system according to claim 1, is characterized in that saving a large amount of desulfurization water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730414.XA CN104456611A (en) | 2014-12-05 | 2014-12-05 | Composite utilization system for waste heat of exhaust fume of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730414.XA CN104456611A (en) | 2014-12-05 | 2014-12-05 | Composite utilization system for waste heat of exhaust fume of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104456611A true CN104456611A (en) | 2015-03-25 |
Family
ID=52903095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410730414.XA Pending CN104456611A (en) | 2014-12-05 | 2014-12-05 | Composite utilization system for waste heat of exhaust fume of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104456611A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807035A (en) * | 2015-04-22 | 2015-07-29 | 郝江平 | Air preheating and flue gas waste heat utilizing system and method |
| CN104949148A (en) * | 2015-06-24 | 2015-09-30 | 江苏海德节能科技有限公司 | Energy saving device of thermal power plant |
| CN104990396A (en) * | 2015-08-05 | 2015-10-21 | 华北理工大学 | System for carrying out lignite drying and water recovery by using waste heat of power plant |
| CN105240825A (en) * | 2015-11-10 | 2016-01-13 | 上海羲蓝节能环保科技有限公司 | Ultralow-emission MGGH energy conservation and environmental protection equipment and method for thermal power plant |
| CN106051805A (en) * | 2016-06-24 | 2016-10-26 | 福建龙净环保股份有限公司 | Waste heat recovery system and method with discharged smoke waste heat as heat source of air heater |
| CN106765268A (en) * | 2017-01-19 | 2017-05-31 | 清华大学 | A kind of residual heat from boiler fume depth retracting device |
| CN106931465A (en) * | 2017-03-29 | 2017-07-07 | 山东泓奥电力科技有限公司 | The united condensing water temperature control system of High Back Pressure Steam Turbine Units machine stove |
| CN107940438A (en) * | 2017-12-26 | 2018-04-20 | 福建龙净环保股份有限公司 | A kind of smoke heat energy utilizes system and its control method |
| CN109869705A (en) * | 2017-12-01 | 2019-06-11 | 河北正能锅炉设备有限公司 | A kind of New efficient energy-saving boiler |
| CN110440234A (en) * | 2019-08-27 | 2019-11-12 | 东方电气集团东方锅炉股份有限公司 | A kind of machine furnace tow taste heat comprehensive utilization adjustment system and its control method |
| CN111735059A (en) * | 2020-05-15 | 2020-10-02 | 安徽建筑大学 | A waste incineration chain furnace with a pre-dehumidification system to increase the supply air temperature |
-
2014
- 2014-12-05 CN CN201410730414.XA patent/CN104456611A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807035A (en) * | 2015-04-22 | 2015-07-29 | 郝江平 | Air preheating and flue gas waste heat utilizing system and method |
| CN104807035B (en) * | 2015-04-22 | 2017-10-03 | 郝江平 | A kind of air preheat and smoke waste heat utilization system and method |
| CN104949148A (en) * | 2015-06-24 | 2015-09-30 | 江苏海德节能科技有限公司 | Energy saving device of thermal power plant |
| CN104990396B (en) * | 2015-08-05 | 2017-05-31 | 华北理工大学 | The system that brown coal drying and Water Sproading are carried out using residual heat of electric power plant |
| CN104990396A (en) * | 2015-08-05 | 2015-10-21 | 华北理工大学 | System for carrying out lignite drying and water recovery by using waste heat of power plant |
| CN105240825A (en) * | 2015-11-10 | 2016-01-13 | 上海羲蓝节能环保科技有限公司 | Ultralow-emission MGGH energy conservation and environmental protection equipment and method for thermal power plant |
| CN106051805A (en) * | 2016-06-24 | 2016-10-26 | 福建龙净环保股份有限公司 | Waste heat recovery system and method with discharged smoke waste heat as heat source of air heater |
| CN106051805B (en) * | 2016-06-24 | 2018-12-14 | 福建龙净环保股份有限公司 | A kind of residual neat recovering system and method using smoke discharging residual heat as steam air heater heat source |
| CN106765268A (en) * | 2017-01-19 | 2017-05-31 | 清华大学 | A kind of residual heat from boiler fume depth retracting device |
| CN106765268B (en) * | 2017-01-19 | 2022-07-26 | 清华大学 | Boiler flue gas waste heat degree of depth recovery unit |
| CN106931465A (en) * | 2017-03-29 | 2017-07-07 | 山东泓奥电力科技有限公司 | The united condensing water temperature control system of High Back Pressure Steam Turbine Units machine stove |
| CN109869705A (en) * | 2017-12-01 | 2019-06-11 | 河北正能锅炉设备有限公司 | A kind of New efficient energy-saving boiler |
| CN107940438A (en) * | 2017-12-26 | 2018-04-20 | 福建龙净环保股份有限公司 | A kind of smoke heat energy utilizes system and its control method |
| CN107940438B (en) * | 2017-12-26 | 2024-05-28 | 福建龙净环保股份有限公司 | Flue gas heat energy utilization system and control method thereof |
| CN110440234A (en) * | 2019-08-27 | 2019-11-12 | 东方电气集团东方锅炉股份有限公司 | A kind of machine furnace tow taste heat comprehensive utilization adjustment system and its control method |
| CN110440234B (en) * | 2019-08-27 | 2023-09-29 | 东方电气集团东方锅炉股份有限公司 | Comprehensive utilization adjustment system for low-grade heat of machine furnace and control method thereof |
| CN111735059A (en) * | 2020-05-15 | 2020-10-02 | 安徽建筑大学 | A waste incineration chain furnace with a pre-dehumidification system to increase the supply air temperature |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |
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| RJ01 | Rejection of invention patent application after publication |