CN109340813A - A kind of vertical tubular Antiblocked device for air preheater - Google Patents
A kind of vertical tubular Antiblocked device for air preheater Download PDFInfo
- Publication number
- CN109340813A CN109340813A CN201811121797.5A CN201811121797A CN109340813A CN 109340813 A CN109340813 A CN 109340813A CN 201811121797 A CN201811121797 A CN 201811121797A CN 109340813 A CN109340813 A CN 109340813A
- Authority
- CN
- China
- Prior art keywords
- blocking
- air
- vertical tubular
- air preheater
- baffle
- 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.)
- Pending
Links
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 8
- 239000003546 flue gas Substances 0.000 description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 15
- 230000000903 blocking effect Effects 0.000 description 10
- 239000000428 dust Substances 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000013517 stratification Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010067482 No adverse event Diseases 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 210000004262 dental pulp cavity Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- FPNCFEPWJLGURZ-UHFFFAOYSA-L iron(2+);sulfite Chemical compound [Fe+2].[O-]S([O-])=O FPNCFEPWJLGURZ-UHFFFAOYSA-L 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 230000000476 thermogenic effect Effects 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
-
- 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
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/15043—Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices
-
- 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
Abstract
The present invention relates to a kind of vertical tubular Antiblocked device for air preheater, including the anti-blocking cabinet for being installed on vertical tubular air preheater air side inlet, the anti-blocking cabinet includes the first air intake and second air intake, first air intake and second air intake are respectively equipped with the first anti-blocking baffle and the second anti-blocking baffle, the first anti-blocking baffle and the second anti-blocking baffle are connected separately with the first anti-blocking driving motor and the second anti-blocking driving motor, the first anti-blocking baffle is used under the driving of the described first anti-blocking driving motor, turn off or on first air intake, the second anti-blocking baffle is used under the driving of the described second anti-blocking driving motor, turn off or on the second air intake.The present invention can be realized anti-blocking, the anti-corrosion of vertical tubular air preheater, and install strong applicability.
Description
Technical field
The invention belongs to the anti-blocking field of air preheater more particularly to a kind of vertical tubular Antiblocked device for air preheater.
Background technique
In existing station boiler, the most common air preheater is tubular air preheater and rotary air preheat
Device.Tubular air preheater simple structure, manufacture, installation and it is easy to maintain, cheap and operational reliability is high.
Tubular air preheater is divided into vertical tubular air preheater and horizontal pipe air according to structure and arrangement
Preheater, vertical tubular air preheater are a cube bobbin carriages, and when flue gas passes through tubular air preheater, flue gas is in pipe
Interior flowing from top to bottom enters deduster, and air is entered the downside of preheater by pressure fan, the transversal flow outside internal pipeline,
Flue gas heat is absorbed from bottom to top.As shown in Figure 1, mitigating low-temperature corrosion, before air preheater to improve air themperature
It is generally equipped with steam air heater 11 in air duct, draws steam from outer steam line and preheats cold air in advance, enter back into air preheater,
To properly increase the air themperature with flue gas heat exchange.
Vertical tubular air preheater is since longitudinal flow, flue-gas temperature constantly drop flue gas along tube length direction in pipe
It is low, therefore be a range along tube length tube wall temperature, it is difficult that the sub- tube wall temperature of every root canal is made all to be higher than acid dew point, especially
At low-temperature zone cool air inlet, easily portion forms dust attachment and vapor dew under the tube, makes pipe by ash blocking, corruption
Erosion.When pipe once being blocked, not only maintenance load is big, and is difficult to remove blocking, has many boilers will blocking in maintenance
After removing, due to pipe corroded penetrate cause to leak out it is also more much bigger than before overhaul.
From the point of view of entire furnace body flue gas flow, air preheater exhaust gases passes section is smaller, and resistance is larger, therefore stifled ash knot
A possibility that slag, is larger.When adhesion time is too long in pipe for laxity dust stratification, some dust stratifications may adsorb the SO in flue gas2、
SO3And vapor, so that dust stratification is generated sulfate and sulphite, and then laxity dust stratification is made to be changed into compactness dust stratification.These
Dust stratification and the effect of air preheater inner tubal wall generate ferric sulfate and iron sulfite, can aggravate the fastness of fouling and slagging, to tube wall
It causes to corrode.When coal-fired ash content increases, corrosion can be more serious.
In the operation of power station large-sized boiler, the blocking and corrosion of vertical tubular air preheater often cause blower electric
The main reason for consumption increases, and combustion chamber draft deficiency and boiler output decline, when in preheater blocking and corrosion reach certain journey
When spending, boiler can be forced blowing out because of power output wretched insufficiency.
With deepening continuously for national energy-saving emission reduction work, new edition " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-
2011) it requires, NOx emission limit value is 50~100mg/Nm3.Present coal burning boiler of power station has installed denitrating system, wherein absolutely
It is most of to use SCR denitration mode, SCR denitration mode run in part the escaping of ammonia necessarily occurs.The ammonia of escape is in air preheat
In device with SO3Hydrogen sulfate ammonia is generated, since hydrogen sulfate ammonia physical property is relatively viscous, dust in flue gas is easily adsorbed, causes air preheat
Device blocking is more serious and is difficult to administer, and seriously affects the safety and stability and economical operation of denitration unit.
Summary of the invention
The object of the present invention is to provide a kind of vertical tubular Antiblocked device for air preheater, are improved by former flue gas heat vertical
Formula tubular air preheater pipeline temperature of lower is allowed to be higher than vapor dew point and acid gas dew point in flue gas, solves vertical tubular
The blocking of air preheater, etching problem, while dissolving the (NH as caused by denitrating system the escaping of ammonia4)HSO4Block substance.
The present invention provides a kind of vertical tubular Antiblocked device for air preheater, including for being installed on vertical tubular air
The anti-blocking cabinet of preheater air side inlet, anti-blocking cabinet include the first air intake and second air intake, the first air
Entrance and second air intake are respectively equipped with the first anti-blocking baffle and the second anti-blocking baffle, and the first anti-blocking baffle and second prevent stopping up
Plate is connected separately with the first anti-blocking driving motor and the second anti-blocking driving motor, and the first anti-blocking baffle is used in the first anti-blocking driving
Under the driving of motor, first air intake is turned off or on, the second anti-blocking baffle is used in the second anti-blocking driving motor
Under driving, second air intake is turned off or on.
Further, the first anti-blocking baffle and the first anti-blocking driving motor, the second anti-blocking baffle and the second anti-blocking driving electricity
Gear drive is used between machine.
Further, the first anti-blocking baffle and the second anti-blocking baffle are set to the top of anti-blocking cabinet.
Further, which further includes the tube wall temperature monitoring system for connecting with vertical tubular air preheater pipeline
System.
According to the above aspect of the present invention, it is pre- to can be realized vertical tubular air by vertical tubular Antiblocked device for air preheater
Anti-blocking, the anti-corrosion of hot device, and strong applicability is installed.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is vertical tubular air preheater layout drawing；
Fig. 2 is a kind of structural schematic diagram of vertical tubular Antiblocked device for air preheater of the present invention；
Fig. 3 is that a kind of anti-blocking driving motor of vertical tubular Antiblocked device for air preheater of the present invention shows with the transmission of anti-blocking baffle
It is intended to.
Figure label:
11- steam air heater；12- vertical tubular air preheater；
The anti-blocking cabinet of 21-；The first air intake of 22-；23- second air intake；The anti-blocking baffle of 24- first；25- second is anti-
Stop up plate；The anti-blocking driving motor of 26- first；The anti-blocking driving motor of 27- second.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Join shown in Fig. 1 to Fig. 3, present embodiments provides a kind of vertical tubular Antiblocked device for air preheater, including be used for
It is installed on the anti-blocking cabinet 21 of 12 air side inlet of vertical tubular air preheater, anti-blocking cabinet 21 includes the first air intake
23 and second air intake 24, the first air intake 23 and second air intake 24 be respectively equipped with the first anti-blocking baffle 24 and second
It is anti-that anti-blocking baffle 25, the first anti-blocking baffle 24 and the second anti-blocking baffle 25 are connected separately with the first anti-blocking driving motor 24 and second
Stifled driving motor 27, the first anti-blocking baffle 24 are used under the driving of the first anti-blocking driving motor 26, turn off or on described the
One air intake 22, the second anti-blocking baffle 25 are used under the driving of the second anti-blocking driving motor 27, turn off or on the second sky
Gas entrance 23.
In the present embodiment, the first anti-blocking baffle 24 and the first anti-blocking driving motor 26, the second anti-blocking baffle 25 and second
Gear drive is used between anti-blocking driving motor 27.
In the present embodiment, the first anti-blocking baffle 24 and the second anti-blocking baffle 25 are set to the top of anti-blocking cabinet 21.
In the present embodiment, which further includes the tube wall temperature prison for connecting with vertical tubular air preheater pipeline
Viewing system, can for the device put into operation the time and stroke provides accurate data reference.
Invention is further described in detail below.
The device is improved rapidly vertical using the method for isolation vertical tubular air preheater unilateral side flue gas and air heat-exchange
Tube-type air preheater pipeline temperature of lower.12 flue gas of vertical tubular air preheater from top to bottom flows inside pipeline, changes therewith
The air of heat enters laterally bobbin carriage by bottom, and by carrying out heat exchange between pipeline and hot fume, which is mounted on vertical tubular
Air intake is divided into arranged on left and right sides by air preheater air side inlet, and unilateral air is reduced when system puts into operation and enters pipe
Case flow carries out the thermogenic action of air preheater pipeline low portion using the original heat of flue gas, and arrangement in detail is shown in Fig. 2.
In boiler controller system actual moving process, the mode of periodically unilateral investment is taken to carry out vertical tubular air preheater
Anti-blocking, anti-corrosion operation, the device whole process is by electronic long-range control, and equipment dependability is by force to boiler operatiopn safety and economy
The tube wall temperature monitoring system for having no adverse effects, while being arranged be the device put into operation the time and stroke provide it is accurate that data are joined
The problem of examining, not only having can effectively solve the blocking of vertical tubular air preheater and corrosion, but also can guarantee air preheater pipe safety, not because
Overtemperature and the problem of cause equipment damage, while temperature-rise period can also be controlled, guarantee flue gas system fiber bag precipitator
The input for safety of equipment.Operation instruction mode is generally unilateral making time 2h, then replaces the other side, it is complete that device puts into single
At time 4h, put into operation once can effectively solve the blocking of vertical tubular air preheater, etching problem daily.
Anti-blocking baffle, anti-blocking driving motor are simple and reliable in the device, and between the two using gear connection transmission, and
Lubricating action is provided using lubricating oil, reduces and is worn between equipment.Connection type is shown in Fig. 3.
Vertical tubular Antiblocked device for air preheater provided in this embodiment has the following technical effect that
1) present apparatus can improve vertical tubular air preheater pipeline temperature of lower by former flue gas heat, be allowed to be higher than cigarette
Vapor dew point and acid gas dew point in gas, solve blocking, the etching problem of vertical tubular air preheater, while dissolving by denitration
(NH caused by system the escaping of ammonia4)HSO4Block substance.
2) present apparatus equipment is simple and operational reliability is high, is influenced vertical tubular air preheat by boiler plant arrangement factor
Device air side-entrance arranged direction is different, and present apparatus mounting means can be installed and be changed with physical device, anti-blocking
Baffle stroke directions can be also modified according to live real space situation, such as stroke or left and right stroke mode up and down.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of vertical tubular Antiblocked device for air preheater, which is characterized in that including pre- for being installed on vertical tubular air
The anti-blocking cabinet of hot device air side inlet, the anti-blocking cabinet include the first air intake and second air intake, and described the
One air intake and second air intake are respectively equipped with the first anti-blocking baffle and the second anti-blocking baffle, the first anti-blocking baffle and
Second anti-blocking baffle is connected separately with the first anti-blocking driving motor and the second anti-blocking driving motor, and the first anti-blocking baffle is used for
Under the driving of the described first anti-blocking driving motor, first air intake is turned off or on, the second anti-blocking baffle is used
Under the driving in the described second anti-blocking driving motor, the second air intake is turned off or on.
2. a kind of vertical tubular Antiblocked device for air preheater according to claim 1, which is characterized in that described first is anti-
Stop up between plate and the first anti-blocking driving motor, the second anti-blocking baffle and the second anti-blocking driving motor using gear drive.
3. a kind of vertical tubular Antiblocked device for air preheater according to claim 2, which is characterized in that described first is anti-
Plate and the second anti-blocking baffle is stopped up to be set to the top of the anti-blocking cabinet.
4. a kind of vertical tubular Antiblocked device for air preheater according to claim 3, which is characterized in that further include being used for
The tube wall temperature monitoring system being connect with vertical tubular air preheater pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811121797.5A CN109340813A (en) | 2018-09-26 | 2018-09-26 | A kind of vertical tubular Antiblocked device for air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811121797.5A CN109340813A (en) | 2018-09-26 | 2018-09-26 | A kind of vertical tubular Antiblocked device for air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109340813A true CN109340813A (en) | 2019-02-15 |
Family
ID=65306430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811121797.5A Pending CN109340813A (en) | 2018-09-26 | 2018-09-26 | A kind of vertical tubular Antiblocked device for air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109340813A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201028790Y (en) * | 2007-04-11 | 2008-02-27 | 南京华电节能环保设备有限公司 | High-performance anti-corrosion air preheater |
| RU2011102300A (en) * | 2011-01-13 | 2012-07-27 | Владимир Евгеньевич Воскресенский (RU) | HAND FILTER FOR THREE-STAGE CLEANING OF AIR FROM MECHANICAL IMPURITIES |
| CN106765288A (en) * | 2017-03-03 | 2017-05-31 | 山西大学 | A kind of classification heat-exchange system of station boiler rotary regenerative air preheater |
| CN108469036A (en) * | 2018-04-17 | 2018-08-31 | 杭州新际能源科技有限公司 | Corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater |
| CN108571772A (en) * | 2018-05-17 | 2018-09-25 | 奥克斯空调股份有限公司 | A kind of empty integral structure and air conditioner only |
-
2018
- 2018-09-26 CN CN201811121797.5A patent/CN109340813A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201028790Y (en) * | 2007-04-11 | 2008-02-27 | 南京华电节能环保设备有限公司 | High-performance anti-corrosion air preheater |
| RU2011102300A (en) * | 2011-01-13 | 2012-07-27 | Владимир Евгеньевич Воскресенский (RU) | HAND FILTER FOR THREE-STAGE CLEANING OF AIR FROM MECHANICAL IMPURITIES |
| CN106765288A (en) * | 2017-03-03 | 2017-05-31 | 山西大学 | A kind of classification heat-exchange system of station boiler rotary regenerative air preheater |
| CN108469036A (en) * | 2018-04-17 | 2018-08-31 | 杭州新际能源科技有限公司 | Corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater |
| CN108571772A (en) * | 2018-05-17 | 2018-09-25 | 奥克斯空调股份有限公司 | A kind of empty integral structure and air conditioner only |
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