CN106440895A - Method for increasing SCR inlet smoke temperature based on heat pipe - Google Patents
Method for increasing SCR inlet smoke temperature based on heat pipe Download PDFInfo
- Publication number
- CN106440895A CN106440895A CN201610880699.4A CN201610880699A CN106440895A CN 106440895 A CN106440895 A CN 106440895A CN 201610880699 A CN201610880699 A CN 201610880699A CN 106440895 A CN106440895 A CN 106440895A
- Authority
- CN
- China
- Prior art keywords
- heat pipe
- heat
- scr inlet
- economizer
- coal economizer
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000779 smoke Substances 0.000 title abstract 7
- 239000003245 coal Substances 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 6
- 235000019504 cigarettes Nutrition 0.000 claims description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- 230000005520 electrodynamics Effects 0.000 claims description 11
- 239000011241 protective layer Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 7
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-M hydrogensulfate Chemical compound OS([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a method for increasing a SCR inlet smoke temperature based on a heat pipe. The method comprises coal economizer furnace walls, heat pipe heat exchangers, a heat exchanger bracket, a heat pipe shell protection layer, a coal economizer, a low-temperature overheater, and an electric valve mounted on the protection layer and connected with a heat pipe shell. The method is characterized in that two rows of heat pipe heat exchangers are additionally mounted on the furnace walls on the left and right two sides of the coal economizer of a vertical shaft at the tail of a boiler; and a heat end of the heat pipe is positioned between the coal economizer and the low-temperature overheater, and a cold end is positioned behind the coal economizer. When the SCR inlet smoke temperature is too low, the electric valve is operated to extend the heat exchangers into the vertical shaft at the tail, and heat is continuously transferred from the front side of the coal economizer to smoke behind the coal economizer, so that the SCR inlet smoke temperature can be guaranteed in a reactor catalyst allowed range. The method adopts the heat pipe with efficient heat transfer and closed and compact structure to exchange heat of smoke in front of and behind the coal economizer, is simple in structure and easy to transform, and can effectively increase the SCR inlet smoke temperature.
Description
Technical field：
The present invention relates to a kind of method of the raising SCR inlet cigarette temperature based on heat pipe, belongs to boiler of power plant denitrification apparatus
Renovation technique field.
Background technology：
In nationwide at present, power plant is all carrying out denitration transformation, as the main method of denitration, though SCR denitration technology is
Maturation, but inlet flue gas temperature control is still the main bugbear in this field.Denitration reactor inlet flue-gas temperature is low will to be caused to urge
Agent activity reduces, if spraying into excess of ammonia gas to control nitrogen oxides, the ammonia density in back-end ductwork will be raised, ammonia
Escape and increase, while sulfur trioxide concentration is raised.The hydrogen sulfate that ammonia and sulfur trioxide are generated in flue-gas temperature 200-300 DEG C
Ammonium, can be bonded on denitrating catalyst and air preheater, and adsorb dust, cause denitrating catalyst and air preheater blocking, and denitration is anti-
Device and air preheater pressure reduction is answered slowly to raise, the reduction so that air-introduced machine is exerted oneself, affect unit output.Based on this, it is necessary to propose
A kind of method of SCR inlet cigarette temperature under raising underload.
Content of the invention：
For the problems referred to above, the present invention proposes a kind of method of the raising SCR inlet cigarette temperature based on heat pipe.
The present invention adopts the following technical scheme that realization：
A kind of method of the raising SCR inlet cigarette temperature based on heat pipe, system includes furnace wall at economizer, heat exchange of heat pipe,
Heat exchanger support, heat pipe package protective layer, economizer, low temperature superheater, and be installed at protective layer and be connected with heat pipe package
Electrodynamic valve together.It is characterized in that：The heat exchange of heat pipe is installed at the economizer on the furnace wall of the left and right sides, simultaneously
Install one group additional, and its hot junction is placed between the economizer and low temperature superheater, after cold end is placed in economizer；The heat exchanger is propped up
Frame is arranged at economizer or so outside furnace wall, all has installation, and bearing is housed below the cold and hot two ends of the heat exchange of heat pipe；
The electrodynamic valve is connected with the heat exchange of heat pipe and heat pipe package protective layer, and can adjust institute by adjusting the electrodynamic valve
State the depth that heat exchange of heat pipe cool and heat ends stretch into furnace wall.
When SCR inlet cigarette temperature is in allowed band, outside the fully extended furnace wall of the heat exchange of heat pipe, system is in cutting out
State.When boiler at low load runs, when SCR inlet cigarette temperature is too low, before operations staff regards SCR, the regulation of cigarette tender feeling condition is described electronic
Valve, controls the cold and hot two ends of the heat exchange of heat pipe to stretch into the depth of tail vertical well furnace wall, controls then the flue gas from before economizer to pass
The heat of flue gas to after economizer, it is ensured that SCR inlet cigarette temperature is in reactor catalyst allowed band.
The current technical method for improving SCR inlet cigarette temperature has a lot, such as split economizer, gas bypass, economizer bypass,
Hot water circuit etc..Compared with prior art, the present invention carries out heat exchange using heat pipe to flue gas before and after economizer, hot tube high-efficiency rate
The closing of heat transfer property and structure is compact so that this method transformation is more convenient, operates more flexible, and performance driving economy is good.
Description of the drawings：
Accompanying drawing is a kind of method structural representation of the raising SCR inlet cigarette temperature based on heat pipe.
In figure：1st, heat exchange of heat pipe；2nd, furnace wall；3rd, heat pipe package protective layer；4th, electrodynamic valve；5th, heat exchanger support；6th, change
Hot device hot junction；7th, heat exchanger cold end；8th, economizer；9th, low temperature superheater.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is particularly stated：
A kind of method of the raising SCR inlet cigarette temperature based on heat pipe, system includes furnace wall at economizer (2), heat pipe heat exchanging
Device (1), heat exchanger support (5), heat pipe package protective layer (3), economizer (8), low temperature superheater (9), and it is installed at protection
Layer the electrodynamic valve (4) for linking together with heat pipe package.It is characterized in that：Heat exchange of heat pipe (1) is installed at the province
On the furnace wall of coal device (8) the place left and right sides, one group is simultaneously installed additional, and its hot junction (6) are placed in the economizer (8) and low temperature superheater
(9) between, after cold end (7) is placed in the economizer (8)；Heat exchanger support (5) are arranged in outside furnace wall, and the heat pipe is changed
All there is installation below hot device (1) cold and hot two ends, and bearing is housed；Electrodynamic valve (4) and the heat exchange of heat pipe (1) and heat pipe
Shell protective layer (3) connects, and can adjust heat exchange of heat pipe cool and heat ends (6) (7) by adjusting electrodynamic valve (4)
Stretch into the depth of furnace wall.
When SCR inlet cigarette temperature is in allowed band, heat exchange of heat pipe cool and heat ends (6) (7) go deep into furnace wall inside dimension
It is zero, system is in and cuts out state.When boiler goes to underrun, SCR inlet cigarette temperature drop is low, described electronic by adjusting
Valve (4), controls heat exchange of heat pipe hot and cold two ends (6) (7) to stretch into the depth of tail vertical well furnace wall (2), the cold and hot two ends of heat pipe
Go deep into the furnace wall (2) deeper, heat pipe is bigger with flue gas heat exchange area in vertical shaft, economizer is transmitted to so as to the flue gas from before economizer
The heat of flue gas is also more afterwards.During the operation of scene, operations staff can be described by adjusting according to SCR inlet cigarette temperature measuring point reading
Electrodynamic valve (4) ensures SCR inlet cigarette temperature in reactor catalyst allowed band controlling flue gas heat exchange amount before and after economizer then
Interior.
Claims (5)
1. a kind of method of the raising SCR inlet cigarette temperature based on heat pipe, system includes furnace wall at economizer (2), heat exchange of heat pipe
(1), heat exchanger support (5), heat pipe package protective layer (3), economizer (8), low temperature superheater (9), and it is installed at protective layer
And the electrodynamic valve (4) for linking together with heat pipe package.
2. as claimed in claim 1 a kind of based on heat pipe raising SCR inlet cigarette temperature method, it is characterised in that：The heat
Heat exchange of heat pipe (1) is installed additional on the furnace wall of the economizer (8) left and right sides, simultaneously installs one group additional, and its hot junction (6) are placed in the province
Between coal device (8) and low temperature superheater (9), after cold end (7) is placed in the economizer (8).
3. as claimed in claim 1 a kind of based on heat pipe raising SCR inlet cigarette temperature method, it is characterised in that：Described change
Hot device support (5) are arranged in outside furnace wall, all have installation, and bearing is housed below the cold and hot two ends of the heat exchange of heat pipe (1).
4. as claimed in claim 1 a kind of based on heat pipe raising SCR inlet cigarette temperature method, it is characterised in that：The electricity
Dynamic valve (4) are connected with the heat exchange of heat pipe (1) and heat pipe package protective layer (3), and permissible by adjusting electrodynamic valve (4)
Adjust the depth that heat exchange of heat pipe cool and heat ends (6) (7) stretch into furnace wall.
5. as claimed in claim 1 a kind of based on heat pipe raising SCR inlet cigarette temperature method, it is characterised in that：Work as boiler
When underrun SCR inlet cigarette temperature is too low, electrodynamic valve (4) being adjusted depending on cigarette tender feeling condition before SCR, controls the heat pipe heat exchanging
Device cool and heat ends (6) (7) stretch into the depth of tail vertical well furnace wall, control then the flue gas from before economizer to be transmitted to flue gas after economizer
Heat, it is ensured that SCR inlet cigarette temperature is in reactor catalyst allowed band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610880699.4A CN106440895B (en) | 2016-10-10 | 2016-10-10 | A method of the raising SCR inlet smoke temperature based on heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610880699.4A CN106440895B (en) | 2016-10-10 | 2016-10-10 | A method of the raising SCR inlet smoke temperature based on heat pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106440895A true CN106440895A (en) | 2017-02-22 |
| CN106440895B CN106440895B (en) | 2018-10-23 |
Family
ID=58173108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610880699.4A Expired - Fee Related CN106440895B (en) | 2016-10-10 | 2016-10-10 | A method of the raising SCR inlet smoke temperature based on heat pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106440895B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028137A (en) * | 2018-08-06 | 2018-12-18 | 东方电气集团东方锅炉股份有限公司 | A kind of tubular preheater and its control method preventing ammonium hydrogen sulfate deposition |
| CN109611819A (en) * | 2018-12-19 | 2019-04-12 | 上海电力学院 | A kind of economizer improving SCR system underrun denitration ability |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001090905A (en) * | 1999-09-20 | 2001-04-03 | Ishikawajima Harima Heavy Ind Co Ltd | Boiler |
| CN2821503Y (en) * | 2005-07-06 | 2006-09-27 | 余德祖 | Heat tube energy saver |
| CN103277788A (en) * | 2013-05-30 | 2013-09-04 | 万平 | SCR temperature regulating system of boiler and method for regulating smoke temperature of SCR inlet of boiler |
| CN103900072A (en) * | 2014-03-05 | 2014-07-02 | 东南大学 | Economizer for improving temperature of smoke in inlet of SCR system |
| CN203944290U (en) * | 2014-02-26 | 2014-11-19 | 福建龙净环保股份有限公司 | A kind of SCR flue gas denitrification system |
| CN104819451A (en) * | 2015-04-03 | 2015-08-05 | 广东电网有限责任公司电力科学研究院 | Boiler economizer capable of controlling SCR inlet smoke temperature |
-
2016
- 2016-10-10 CN CN201610880699.4A patent/CN106440895B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001090905A (en) * | 1999-09-20 | 2001-04-03 | Ishikawajima Harima Heavy Ind Co Ltd | Boiler |
| CN2821503Y (en) * | 2005-07-06 | 2006-09-27 | 余德祖 | Heat tube energy saver |
| CN103277788A (en) * | 2013-05-30 | 2013-09-04 | 万平 | SCR temperature regulating system of boiler and method for regulating smoke temperature of SCR inlet of boiler |
| CN203944290U (en) * | 2014-02-26 | 2014-11-19 | 福建龙净环保股份有限公司 | A kind of SCR flue gas denitrification system |
| CN103900072A (en) * | 2014-03-05 | 2014-07-02 | 东南大学 | Economizer for improving temperature of smoke in inlet of SCR system |
| CN104819451A (en) * | 2015-04-03 | 2015-08-05 | 广东电网有限责任公司电力科学研究院 | Boiler economizer capable of controlling SCR inlet smoke temperature |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028137A (en) * | 2018-08-06 | 2018-12-18 | 东方电气集团东方锅炉股份有限公司 | A kind of tubular preheater and its control method preventing ammonium hydrogen sulfate deposition |
| CN109611819A (en) * | 2018-12-19 | 2019-04-12 | 上海电力学院 | A kind of economizer improving SCR system underrun denitration ability |
| CN109611819B (en) * | 2018-12-19 | 2021-02-26 | 上海电力学院 | Improve economizer of SCR system low-load operation denitration ability |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106440895B (en) | 2018-10-23 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181023 |