CN110118362A - A kind of tube-type air preheater for preventing hydrogen sulfate ammonia from blocking - Google Patents
A kind of tube-type air preheater for preventing hydrogen sulfate ammonia from blocking Download PDFInfo
- Publication number
- CN110118362A CN110118362A CN201910498171.4A CN201910498171A CN110118362A CN 110118362 A CN110118362 A CN 110118362A CN 201910498171 A CN201910498171 A CN 201910498171A CN 110118362 A CN110118362 A CN 110118362A
- Authority
- CN
- China
- Prior art keywords
- air
- heat exchange
- tube
- subregion
- preheater
- 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
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 230000000903 blocking effect Effects 0.000 title claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 20
- 238000005192 partition Methods 0.000 claims abstract description 18
- 206010022000 influenza Diseases 0.000 claims abstract description 11
- 230000003447 ipsilateral effect Effects 0.000 claims abstract description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 235000019504 cigarettes Nutrition 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 230000002411 adverse Effects 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000000126 substance Substances 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
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
The invention discloses the tube-type air preheaters that one kind can prevent hydrogen sulfate ammonia from blocking, the tube-type air preheater includes air preheater shell, the intracorporal centre of air preheater shell is divided into First air heat exchange area and Secondary Air heat exchange area with primary and secondary air channel partition, First air heat exchange area and Secondary Air heat exchange area ipsilateral respectively First air air inlet duct and Secondary Air air inlet duct, the opposite other side is respectively First air outlet and Secondary Air outlet；Several flues are evenly arranged in the air preheater shell, one end of several flues is gas inlet, and the other end is exhanst gas outlet.The present invention decomposes hydrogen sulfate ammonia by improving temperature to heat exchange area subregion in tube-type air preheater, each load Duan Junke Hand scarf blocking can be achieved, and a hot blast temperature, secondary hot-air temperature, exhaust gas temperature and design value are not much different, and will not cause adverse effect to boiler combustion and the subsequent deduster of air preheater.
Description
Technical field
The invention belongs to boiler tube-type air preheater fields, and in particular to the tubular type that one kind can prevent hydrogen sulfate ammonia from blocking is empty pre-
Device.
Background technique
More stringent with National Pollutant Discharge control, the NOx emission standard of boiler emission is lower and lower, in order to reach
To national legislation requirement, boiler, which is all designed or is transformed, has installed flue gas SCR denitration device additional, under the effect of the catalyst, by nitrogen oxygen
Compound is decomposed into nitrogen and water, but inevitably a small amount of sulfur dioxide can be oxidized generation sulfur trioxide, with not joining for escape
Hydrogen sulfate ammonia is generated at a suitable temperature with the ammonia of denitration reaction.
Hydrogen sulfate ammonia is a kind of high viscosity substance, is easy to be attached on the heat-transfer surface of air preheater, and capture in flue gas
Dust particles, to block air preheater.
Tube-type air preheater is a kind of station boiler commonly air preheater equipment, since inner tube smoke flow region is narrow, pipe
If inner wall is stained with hydrogen sulfate ammonia, the flue is easily blocked, as more and more flues are blocked, tubular type is empty pre-
Device inlet outlet pressure differential is excessive, and due to lacking effective tube-type air preheater soot blower, boiler will be forced blowing out cleaning.
It is blocked at present for the hydrogen sulfate ammonia of tube-type air preheater, there is no preferable treating method, it is clear generally by blowing out
Reason.
Summary of the invention
It is an object of the invention in view of the above shortcomings of the prior art, provide one kind to prevent hydrogen sulfate ammonia from blocking
Tube-type air preheater.
The present invention adopts the following technical scheme that realize:
A kind of tube-type air preheater for preventing hydrogen sulfate ammonia from blocking, which includes air preheater shell, air preheater
The intracorporal centre of shell is divided into First air heat exchange area and Secondary Air heat exchange area, First air heat exchange with primary and secondary air channel partition
Region and Secondary Air heat exchange area ipsilateral respectively First air air inlet duct and Secondary Air air inlet duct, the opposite other side is respectively one
Secondary wind outlet and Secondary Air outlet；Several flues, one end of several flues have been evenly arranged in the air preheater shell
For gas inlet, the other end is exhanst gas outlet.
A further improvement of the present invention lies in that the vertical First air direction in First air heat exchange area is drawn in the tube-type air preheater
It is divided into several First air heat exchange subregions, each region is separated with First air region partition.
A further improvement of the present invention lies in that the vertical Secondary Air direction in Secondary Air heat exchange area is drawn in the tube-type air preheater
It is divided into several Secondary Air heat exchange subregions, each region is separated with Secondary Air region partition.
A further improvement of the present invention lies in that the vertical First air direction of First air air inlet duct be divided into several First airs into
Wind subregion, each region are separated with First air region partition.
A further improvement of the present invention lies in that divided each First air enters the wind subregion in First air air inlet duct, all
First air is set and enters the wind subregion damper.
A further improvement of the present invention lies in that the vertical Secondary Air direction of Secondary Air air inlet duct be divided into several Secondary Airs into
Wind subregion, each region are separated with Secondary Air region partition.
A further improvement of the present invention lies in that divided each Secondary Air enters the wind subregion in Secondary Air air inlet duct, all
Secondary Air is set and enters the wind subregion damper.
A further improvement of the present invention lies in that flue gas flows into tubular type sky from gas inlet when the tube-type air preheater works
Pre- device, flows in flue, flows out from exhanst gas outlet, First air and Secondary Air all flow in air preheater shell；It closes
One First air air inlet subregion damper and a Secondary Air enter the wind subregion damper, and nothing is primary in the two regions
Air-cooled wind or second wind cooling wind flow through, but the flue in corresponding First air heat exchange subregion and Secondary Air heat exchange subregion
Still there is high-temperature flue gas to flow through, thus corresponding First air heat exchange subregion and Secondary Air heat exchange subregion temperature will gradually rise to
260-270 DEG C, at such a temperature, the sulphur sticked in flue in First air heat exchange subregion and Secondary Air heat exchange subregion
Sour hydrogen ammonia will be decomposed into gas, so that the flue of the areas of blockage is dredged.
A further improvement of the present invention lies in that be repeated in above-mentioned steps, guarantee all First air heat exchange subregion and
The hydrogen sulfate ammonia sticked in Secondary Air heat exchange subregion all decomposes, it is ensured that all flues of entire tube-type air preheater all will not
Blocking.
The present invention has following beneficial technical effect:
The tube-type air preheater that one kind provided by the invention can prevent hydrogen sulfate ammonia from blocking, by exchanging heat in tube-type air preheater
Regional compartmentalization improves temperature and decomposes hydrogen sulfate ammonia, it can be achieved that each load Duan Junke Hand scarf blocks, and hot blast temperature, two
Secondary hot blast temperature, exhaust gas temperature and design value are not much different, and will not cause to boiler combustion and the subsequent deduster of air preheater bad
It influences.
Detailed description of the invention
Fig. 1 is the front view for the tube-type air preheater that one kind of the present invention can prevent hydrogen sulfate ammonia from blocking；
Fig. 2 is the top view for the tube-type air preheater that one kind of the present invention can prevent hydrogen sulfate ammonia from blocking；
Fig. 3 is the side view for the tube-type air preheater that one kind of the present invention can prevent hydrogen sulfate ammonia from blocking.
Description of symbols:
1 is air preheater shell；2 be primary and secondary air channel partition；3 be First air region partition；4 for Secondary Air region every
Plate；5 be flue；6 be First air heat exchange subregion；7 be Secondary Air heat exchange subregion；8 be First air air inlet duct；9 be two
Secondary wind air inlet duct；10 enter the wind subregion damper for First air；11 enter the wind subregion damper for Secondary Air；12 be primary
Wind outlet；13 export for Secondary Air；14 be gas inlet；15 be exhanst gas outlet.
Specific embodiment
The present invention is made further instructions below in conjunction with attached drawing.
As shown in Figure 1 to Figure 3, the tube-type air preheater that one kind provided by the invention can prevent hydrogen sulfate ammonia from blocking, the tubular type
Air preheater includes air preheater shell 1, and the centre in air preheater shell 1 is divided with primary and secondary air channel partition 2 for First air heat transfer zone
Domain 6 and Secondary Air heat exchange area 7, the ipsilateral respectively First air air inlet duct 8 in First air heat exchange area 6 and Secondary Air heat exchange area 7
With Secondary Air air inlet duct 9, the opposite other side is respectively First air outlet 12 and Secondary Air outlet 13；In the air preheater shell 1
Several flues 5 are evenly arranged, one end of several flues 5 is gas inlet 14, and the other end is exhanst gas outlet 15.Pipe
The vertical First air direction in First air heat exchange area 6 is divided into several First airs heat exchange subregions in formula air preheater, each region with
First air region partition 3 separates.The vertical Secondary Air direction in Secondary Air heat exchange area 7 is divided into several secondary in tube-type air preheater
Wind heat exchange subregion, each region is separated with Secondary Air region partition 4.
Wherein, the vertical First air direction of First air air inlet duct 8 is divided into several First airs air inlet subregions, each region with
First air region partition 3 separates.And divided each First air enters the wind subregion in First air air inlet duct 8, all settings are primary
Wind enters the wind subregion damper 10.The vertical Secondary Air direction of Secondary Air air inlet duct 9 is divided into several Secondary Air air inlet sub-districts
Domain, each region are separated with Secondary Air region partition 4.And divided each Secondary Air enters the wind subregion in Secondary Air air inlet duct 9,
All setting Secondary Airs enter the wind subregion damper 11.
When the tube-type air preheater works, flue gas flows into the tube-type air preheater from gas inlet 14, flows in flue 5
It is dynamic, it is flowed out from exhanst gas outlet 15, First air and Secondary Air all flow in air preheater shell 1.Close First air air inlet
Zone damper baffle and Secondary Air enter the wind subregion damper, without first cooling by wind wind or second wind cooling in the two regions
Wind flows through, but the flue 5 in corresponding First air heat exchange subregion 6 and Secondary Air heat exchange subregion 7 still has high-temperature flue gas
It flows through, therefore corresponding First air heat exchange subregion 6 and Secondary Air heat exchange 7 temperature of subregion will gradually rise to 260-270 DEG C,
At such a temperature, the hydrogen sulfate ammonia sticked in flue 5 in First air heat exchange subregion 6 and Secondary Air heat exchange subregion 7
It will be decomposed into gas, so that the flue 5 of the areas of blockage is dredged.Aforesaid operations are repeated, guarantee all First airs
The hydrogen sulfate ammonia sticked in heat exchange subregion 6 and Secondary Air heat exchange subregion 7 all decomposes, it is ensured that entire tube-type air preheater owns
Flue 5 will not all block.
Claims (9)
1. the tube-type air preheater that one kind can prevent hydrogen sulfate ammonia from blocking, which is characterized in that the tube-type air preheater includes air preheater shell
Body (1), centre in air preheater shell (1) with primary and secondary air channel partition (2) be divided into First air heat exchange area (6) with it is secondary
Wind heat exchange area (7), First air heat exchange area (6) and Secondary Air heat exchange area (7) it is ipsilateral be respectively First air air inlet duct (8) and
Secondary Air air inlet duct (9), the opposite other side are respectively First air outlet (12) and Secondary Air outlet (13)；The air preheater shell
(1) it has been evenly arranged several flues (5) in, one end of several flues (5) is gas inlet (14), and the other end is cigarette
Gas exports (15).
2. the tube-type air preheater that one kind according to claim 1 can prevent hydrogen sulfate ammonia from blocking, which is characterized in that the tubular type
First air heat exchange area (6) vertical First air direction is divided into several First airs heat exchange subregions in air preheater, each region with
First air region partition (3) separates.
3. the tube-type air preheater that one kind according to claim 1 can prevent hydrogen sulfate ammonia from blocking, which is characterized in that the tubular type
Secondary Air heat exchange area (7) vertical Secondary Air direction is divided into several Secondary Airs heat exchange subregions in air preheater, each region with
Secondary Air region partition (4) separates.
4. the tube-type air preheater that one kind according to claim 1 can prevent hydrogen sulfate ammonia from blocking, which is characterized in that First air
The vertical First air direction of air inlet duct (8) is divided into several First air air inlet subregions, and each region is with First air region partition (3)
It separates.
5. the tube-type air preheater that one kind according to claim 4 can prevent hydrogen sulfate ammonia from blocking, which is characterized in that First air
Divided each First air enters the wind subregion in air inlet duct (8), and all setting First airs enter the wind subregion damper (10).
6. the tube-type air preheater that one kind according to claim 5 can prevent hydrogen sulfate ammonia from blocking, which is characterized in that Secondary Air
The vertical Secondary Air direction of air inlet duct (9) is divided into several Secondary Air air inlet subregions, and each region is with Secondary Air region partition (4)
It separates.
7. the tube-type air preheater that one kind according to claim 6 can prevent hydrogen sulfate ammonia from blocking, which is characterized in that Secondary Air
Divided each Secondary Air enters the wind subregion in air inlet duct (9), and all setting Secondary Airs enter the wind subregion damper (11).
8. the tube-type air preheater that one kind according to claim 7 can prevent hydrogen sulfate ammonia from blocking, which is characterized in that the tubular type
When air preheater works, flue gas flows into the tube-type air preheater from gas inlet (14), and flowing, goes out from flue gas in flue (5)
The flowing all in air preheater shell (1) of mouth (15) outflow, First air and Secondary Air；Close a First air air inlet subregion air door
Baffle (10) and a Secondary Air enter the wind subregion damper (11), without first cooling by wind wind or second wind cooling in the two regions
Wind flows through, but the flue (5) in corresponding First air heat exchange subregion (6) and Secondary Air heat exchange subregion (7) still has height
Warm flue gas flows through, thus corresponding First air heat exchange subregion (6) and Secondary Air exchange heat subregion (7) temperature will gradually rise to
260-270 DEG C, at such a temperature, flue (5) in First air heat exchange subregion (6) and Secondary Air heat exchange subregion (7)
In the hydrogen sulfate ammonia that sticks will be decomposed into gas so that the flue (5) of the areas of blockage is dredged.
9. the tube-type air preheater that one kind according to claim 8 can prevent hydrogen sulfate ammonia from blocking, which is characterized in that successively weigh
Step in multiple claim 8 guarantees that all First air heat exchange subregion (6) and Secondary Air exchange heat and sticks in subregion (7)
Hydrogen sulfate ammonia all decomposes, it is ensured that all flues (5) of entire tube-type air preheater will not all block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910498171.4A CN110118362B (en) | 2019-06-10 | 2019-06-10 | Tubular air preheater capable of preventing ammonium bisulfate from being blocked |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910498171.4A CN110118362B (en) | 2019-06-10 | 2019-06-10 | Tubular air preheater capable of preventing ammonium bisulfate from being blocked |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110118362A true CN110118362A (en) | 2019-08-13 |
| CN110118362B CN110118362B (en) | 2024-02-23 |
Family
ID=67524036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910498171.4A Active CN110118362B (en) | 2019-06-10 | 2019-06-10 | Tubular air preheater capable of preventing ammonium bisulfate from being blocked |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110118362B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500601A (en) * | 2019-08-22 | 2019-11-26 | 华能国际电力股份有限公司 | Method for treating excessive SCR denitration ammonia escape and blockage of air preheater |
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| KR20130094272A (en) * | 2013-07-30 | 2013-08-23 | 알스톰 테크놀러지 리미티드 | Regenerative air preheater design to reduce cold end fouling |
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Cited By (1)
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| CN110500601A (en) * | 2019-08-22 | 2019-11-26 | 华能国际电力股份有限公司 | Method for treating excessive SCR denitration ammonia escape and blockage of air preheater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110118362B (en) | 2024-02-23 |
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