CN108469036A - Corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater - Google Patents
Corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater Download PDFInfo
- Publication number
- CN108469036A CN108469036A CN201810345406.1A CN201810345406A CN108469036A CN 108469036 A CN108469036 A CN 108469036A CN 201810345406 A CN201810345406 A CN 201810345406A CN 108469036 A CN108469036 A CN 108469036A
- Authority
- CN
- China
- Prior art keywords
- air preheater
- flue gas
- air
- blocking
- warm
- 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
- 238000004140 cleaning Methods 0.000 title claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 101
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 97
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 238000005192 partition Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 64
- 230000000903 blocking effect Effects 0.000 claims description 17
- 230000014759 maintenance of location Effects 0.000 claims description 11
- 239000003517 fume Substances 0.000 claims description 10
- 235000019504 cigarettes Nutrition 0.000 claims description 7
- 239000000428 dust Substances 0.000 abstract description 8
- 238000013517 stratification Methods 0.000 abstract description 7
- 239000003245 coal Substances 0.000 abstract description 5
- 238000010977 unit operation Methods 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002918 waste heat Substances 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
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2700/00—Ash removal, handling and treatment means; Ash and slag handling in pulverulent fuel furnaces; Ash removal means for incinerators
- F23J2700/001—Ash removal, handling and treatment means
-
- 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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
- Chimneys And Flues (AREA)
Abstract
Present invention offer one kind is simple and reasonable, deashing initiative is strong, corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater with long service life.A kind of corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater, including air preheater babinet and multiple warm-up blocks, multiple warm-up blocks are arranged in juxtaposition in air preheater babinet, air preheater partition board is equipped between adjacent warm-up block, the air preheater babinet is equipped with multiple air baffle devices at air passage inlet, each air baffle device corresponds to a warm-up block, the air preheater babinet is equipped with flue gas recovery device in high temperature flue exit, and flue gas recovery device is connected to by circulating line with high temperature flue entrance.Initial investment of the present invention is less, is used convenient for large-scale promotion, and internal structure makes warm-up block pipeline prevent dust stratification from adhering to, and realizes the corrosion-and blocking-prevention of pipeline, reduces air preheater resistance, reduces coal unit operation expense.
Description
Technical field
The present invention relates to a kind of air preheater, more particularly to a kind of vertical tubular air preheater.
Background technology
Air preheater is the equipment using air needed for flue gas waste heat at the end of boiler heating preparation of fuel and burning.Boiler
Burning condition is improved while improving boiler thermal efficiency using air preheater in system, makes the imperfect combustion of fuel
Heat loss declines, and reinforces the radiant heat transfer in burner hearth, also saves evaporating heating surface.
In general, it is usually arranged on containing water vapour and sulfuric acid vapor positioned at the air preheater of boiler tail
Low-temperature flue gas region, operating condition is more severe, is susceptible to low-temperature corrosion and stifled ash.And positioned at the sky in boiler low-temperature region
Air preheater will result in exhaust gases passes blocking, air inducing resistance increases, or even makes boiler once low-temperature corrosion and stifled ash occurs
Pressure combustion limits the output of boiler, to cause to be forced blowing out.Corrosion can cause the tube leak of air preheater to damage
It is bad, it causes seriously to leak out, combustion conditions is caused to deteriorate, more seriously, must not need and infrequently replace heating surface, both increased
Maintenance load and spillage of material, also affect the normal operation of boiler.Cold air enters fume side, can reduce smoke temperature, add
The stifled ash of speed and the speed of low-temperature corrosion, and then cause the cycle of pernicious sieve, threaten safe operation of the boiler.
As air preheater applications are in out of stock device, NH4HSO4Deposition causes low-temperature zone heat accumulating element to block up the problem of ash frequently
Hair, flue gas collateral resistance constantly rise, and need to be adhered to heat accumulating element surface by passive remove of high pressure water washing technology when serious
Dust stratification.Moreover, with the execution of coal unit minimum discharge standard, NOX Discharge index requires to keep under strict control in 50mg/nm3Hereinafter,
Ash Blocking in Air Preheater problem will be therefore more serious.Technical staff takes a variety of methods, for example, using enamel heat accumulating element,
Reinforce air preheater steam soot blowing to put into operation the measures such as management, the opposite low sulfur content coal quality of burning, limitation out of stock the escaping of ammonia of SCR,
But it still fails to effectively solve the problems, such as Ash Blocking in Air Preheater.The problem in industry generally existing, according to current desulfurization
The design of system, installation, key parameter level monitoring are extremely difficult to using general Ash Blocking in Air Preheater Treatment process
Its performance design value.
Invention content
The purpose of the present invention is to provide it is a kind of it is simple and reasonable, deashing initiative is strong, anti-corrosion with long service life is anti-
Stifled automatically cleaning vertical tubular air preheater, has an automatically cleaning pattern better than the passive deashing of external flushing device, simple installation,
Operation is flexible, solves the problems, such as to propose in background above technology.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater, including air preheater babinet and multiple warm-up blocks, air preheater
The high temperature flue and air duct for carrying out heat exchange are equipped in babinet, multiple warm-up blocks are arranged in juxtaposition in air preheater
In babinet, air preheater partition board is equipped between adjacent warm-up block, each warm-up block includes several parallel along high temperature flue
The high-temperature flue gas pipe of arrangement, the air preheater babinet are equipped with multiple air baffle devices, Mei Gekong at air passage inlet
Air bound latch device corresponds to a warm-up block, and the air preheater babinet fills in high temperature flue exit equipped with off-gas recovery
It sets, flue gas recovery device is connected to by circulating line with high temperature flue entrance.Each air baffle device can be controlled individually
System, when being closed an air baffle device, corresponding warm-up block is due to losing air exchange heat, high-temperature flue gas
The tube wall temperature of pipe rises, and high-temperature flue gas evaporates the NH of tube wall adherency4HSO4And wash away and take away dust stratification, after tube wall cleaning
It is then turned on this air baffle device, other warm-up blocks still work normally during this period, and air baffle device can be as needed
It is opened and closed successively, online automatically cleaning in the operation of vertical tubular air preheater is realized with this；When air baffle device is closed, cigarette
Gas recovering device can recycle the not high-temperature flue gas with air exchange heat, and send it back to high-temperature flue gas by circulating line and lead to
Road entrance carries out heat exchange after the unlatching of air baffle device, reaches energy-efficient purpose again.
Preferably, the air baffle device includes air register, main shaft and control unit, air register and main shaft
It is fixedly connected, main shaft is hinged with air preheater babinet, and control unit is connect with spindle nose.Air register is opposite by axle center of main shaft
Air preheater body pivot, control unit is by the rotational angle of Spindle control air register, and to control air, to enter air logical
The flow in road；When not needing deashing, air register fully opens, and the blocking surface of air register is parallel with air direction of travel,
Air is not stopped；When needing deashing, air register is closed, and the blocking surface of air register is vertical with air direction of travel
Or at an angle, air is stopped as needed.
Preferably, the main shaft is parallel with high-temperature flue gas pipe.The high-temperature flue gas pipe of vertical tubular air preheater is perpendicular
To arrangement, main shaft is vertically arranged, facilitates installation and facilitates the space layout of air register, and prevents space limitation from air being made to keep off
Plate opening angle is insufficient.
Preferably, the area of the air register is less than or equal at air passage inlet between adjacent air preheater partition board
Area.
Preferably, the flue gas recovery device include wind turbine, flue gas collector, multiple flue gas branch pipes and with multiple flue gases
Multiple gas fume valves of branch pipe cooperation, wind turbine one end connect circulating line, and the wind turbine other end connects flue gas collector, and flue gas collector is logical
It crosses multiple flue gas branch pipes to be connected to high temperature flue exit, a flue gas branch pipe is set between adjacent air preheater partition board, often
One gas fume valve, the quantity of flue gas branch pipe, the quantity phase of the quantity of gas fume valve and warm-up block are set on a flue gas branch pipe
Together.
Coordinate with flue gas recovery device preferably, the air preheater babinet is additionally provided in high temperature flue exit
Multiple flue gas retention devices, each flue gas retention device be set between a warm-up block and high temperature flue exit,
Flue gas recovery device is between flue gas retention device and warm-up block.It is run in air baffle device and flue gas recovery device
When, flue gas retention device can close the high temperature flue where its correspondence warm-up block, reinforce the recovering effect of flue gas.
Preferably, the flue gas retention device includes gas baffle, gas baffle axis and gas baffle control unit,
Gas baffle is fixedly connected with gas baffle axis, and gas baffle axis is hinged with air preheater babinet, gas baffle control unit and cigarette
Gas baffle shaft end connects.Gas baffle is the opposite air preheater body pivot in axle center, gas baffle control unit using gas baffle axis
Part controls gas baffle rotation by gas baffle axis, to realize the blocking effect to flue gas.
Preferably, the gas baffle axis is vertical with high-temperature flue gas pipe.The high temperature cigarette of vertical tubular air preheater
Tracheae is vertically arranged, and high-temperature flue gas is advanced along high temperature flue, and gas baffle axis is laterally arranged, and is convenient for gas baffle control unit
The space layout of part and gas baffle facilitates installation.
The beneficial effects of the invention are as follows：
1, corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater of the invention, simple and reasonable, convenient processing and manufacture, initial stage
It invests less, is used convenient for large-scale promotion, internal structure makes warm-up block pipeline prevent dust stratification from adhering to, and realizes the anti-of pipeline
It is rotten anti-blocking, air preheater resistance is reduced, coal unit operation expense is reduced.
2, it need not shut down and be rinsed there are when dust stratification in air preheater pipeline, pass through orderly controllable blocking
The heat exchange of the flue gas and air of different warm-up blocks in air preheater, the ammonium hydrogen sulfate gasification for making pipe wall adhere to are real
Existing automatically cleaning, while other warm-up block normal operations, do not influence behavior in service of the air preheater in boiler, improve whole
The operational reliability and economy of a coal unit.
3, when blocking heat exchange to carry out deashing, after the flue gas recovery device in the present invention can be recycled high-temperature flue gas
So that it is carried out heat exchange again, improve performance driving economy, saves energy consumption.
Description of the drawings
Fig. 1 is the main structure diagram of the present invention；
Fig. 2 is the internal structure schematic diagram of the present invention；
Fig. 3 is the internal structure side view of the present invention.
In figure：1, air preheater babinet, 2, warm-up block, 3, high temperature flue, 4, air duct, 5, air preheater partition board,
6, high-temperature flue gas pipe, 7, air baffle device, 8, flue gas recovery device, 9, circulating line, 10, flue gas retention device, 701, empty
Gas baffle, 702, main shaft, 703, control unit, 801, wind turbine, 802, flue gas collector, 803, flue gas branch pipe, 804, gas fume valve,
1001, gas baffle, 1002, gas baffle axis, 1003, gas baffle control unit.
Specific implementation mode
Below by specific embodiment, and in conjunction with attached drawing, technical scheme of the present invention will be further explained in detail.It answers
Work as understanding, implementation of the invention is not limited to the following examples, the accommodation in any form done to the present invention and/or
Change falls within the scope of the present invention.
Embodiment：
A kind of corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater as shown in Fig. 1 ~ 3, including air preheater babinet 1 and four are pre-
Thermal modules 2, the interior high temperature flue 3 and air duct 4 being equipped with for carrying out heat exchange of air preheater babinet 1, high-temperature flue gas are logical
Road 3 and air duct 4 are mutually perpendicular to, and four warm-up blocks 2 are arranged in juxtaposition in air preheater babinet 1, between adjacent warm-up block 2
Equipped with air preheater partition board 5, each warm-up block 2 includes several high-temperature flue gas pipes 6 being arranged in parallel along high temperature flue 3.
Air preheater babinet 1 is equipped with multiple air baffle devices 7 in 4 entrance of air duct, and each air baffle device 7 is right
Answer a warm-up block 2.Air preheater babinet 1 is equipped with flue gas recovery device 8, off-gas recovery dress in 3 exit of high temperature flue
8 are set to be connected to 3 entrance of high temperature flue by circulating line 9.
Each air baffle device 7 can be controlled individually, when being closed an air baffle device 7, corresponding warm-up block 2
Due to losing air exchange heat, the tube wall temperature of high-temperature flue gas pipe 6 rises, and high-temperature flue gas evaporates tube wall adherency
NH4HSO4And wash away and take away dust stratification, this air baffle device 7 is then turned on after tube wall cleaning, during this period other pre- hot-dies
Block 2 still works normally, and air baffle device 7 can be opened and closed successively as needed, this vertical tubular air preheater is realized with this
Online automatically cleaning in operation.Because realizing self-cleaning function, the high-temperature flue gas pipe of warm-up block can be real using common material
Existing corrosion-and blocking-prevention, reduces manufacture and operation expense.
When air baffle device 7 is closed, flue gas recovery device 8 can recycle the not high temperature cigarette with air exchange heat
Gas, and it is sent back to high temperature flue 3 entrance by circulating line 9, hot friendship is carried out again after the unlatching of air baffle device 7
It changes, reaches energy-efficient purpose.
Air baffle device 7 includes air register 701, main shaft 702 and control unit 703, air register 701 and main shaft
703 are fixedly connected, and main shaft 702 is hinged with air preheater babinet 1, and control unit 703 is connect with 702 end of main shaft.Air register 701
It is that axle center is rotated relative to air preheater babinet 1 with main shaft 702, control unit 702 controls turning for air register 701 by main shaft 702
Dynamic angle, to control the flow that air enters air duct 4.When not needing deashing, air register 701 fully opens, empty
The blocking surface of gas baffle 701 is parallel with air direction of travel, does not stop to air.When needing deashing, air register 701
It is closed, the blocking surface of air register 701 is vertical with air direction of travel or at an angle, hinders as needed air
Gear.
Main shaft 702 is parallel with high-temperature flue gas pipe 6.The high-temperature flue gas pipe of vertical tubular air preheater is vertically arranged, main shaft
702 is vertically arranged, facilitates installation and facilitates the space layout of air register 701, and prevents space limitation from making air register 701
Opening angle is insufficient.Main shaft 702 is fixedly connected along 701 center line of air register with air register 701, main shaft 702 and pre- hot-die
The distance of block towards air duct side is equal to air register center line at a distance from air register side, and such design is convenient
The folding of air register, and the conveniently control to gas barrier effect.The area of air register 701 is equal to 4 import of air duct
Locate the area between adjacent air preheater partition board 5.
Flue gas recovery device 8 include wind turbine 801,802, four flue gas branch pipes 803 of flue gas collector and with four flue gas branch pipes
Four gas fume valves 804 of 803 cooperations.801 one end of wind turbine connects circulating line 9, and 801 other end of wind turbine connects flue gas collector
802, flue gas collector 802 is connected to by multiple flue gas branch pipes 803 with 3 exit of high temperature flue, adjacent air preheater partition board 5 it
Between a flue gas branch pipe 803 is set, a gas fume valve 804 is set on each flue gas branch pipe 803, the quantity of flue gas branch pipe 803,
The quantity of gas fume valve 804 is identical as the quantity of warm-up block 2.
Air preheater babinet 1 is additionally provided with the four flue gases resistance coordinated with flue gas recovery device 8 in 3 exit of high temperature flue
Blocking means 10, each flue gas retention device 10 are set between 3 exit of a warm-up block 2 and high temperature flue, and flue gas returns
Receiving apparatus 8 is between flue gas retention device 10 and warm-up block 2.It is run in air baffle device 7 and flue gas recovery device 8
When, flue gas retention device 10 can close it and correspond to the high temperature flue 3 at 2 place of warm-up block, reinforce the recycling effect of flue gas
Fruit.
Flue gas retention device 10 includes gas baffle 1001, gas baffle axis 1002 and gas baffle control unit 1003,
Gas baffle 1001 is fixedly connected with gas baffle axis 1002, and gas baffle axis 1002 is hinged with air preheater babinet 1, gas baffle
Control unit 1003 is connect with 1002 end of gas baffle axis.Gas baffle 1001 is that axle center is relatively empty with gas baffle axis 1002
Pre- device babinet 1 rotates, and gas baffle control unit 1003 controls gas baffle 1001 by gas baffle axis 1002 and rotates, to
Realize the blocking effect to flue gas.
Gas baffle axis 1002 is vertical with high-temperature flue gas pipe 6.The vertical cloth of high-temperature flue gas pipe of vertical tubular air preheater
It sets, high-temperature flue gas is advanced along high temperature flue 3, and gas baffle control unit is convenient in the laterally setting of gas baffle axis 1002
1003 and gas baffle 1001 space layout, facilitate installation.
In coal-burning boiler burner hearth, the SO in flue gas2There are about 0.5%~1.0% to be oxidized to SO3, after installing SCR system additional,
NOx is being reduced into N by catalyst2While, by about 1.0% SO2It is oxidized to SO3, present in SCR reactor outlet flue gases
Unreacted escape ammonia（NH3）、SO3And the hydrogen sulfate ammonia that vapor reaction generates has stickiness, fusing point is under normal conditions
147 DEG C, flying dust is scattered in flue gas and sticked in liquid form, can block the high-temperature flue gas of corrosion vertical tubular air preheater
Pipe；By the controllable heat exchange for blocking flue gas and air in vertical tubular air preheater, the high temperature without heat exchange
Flue gas can promote the tube wall temperature of warm-up block low-temperature zone in air preheater, so that temperature is reached 190 DEG C, to evaporate pipe
The ammonium hydrogen sulfate of wall adherency, and wash away and take away dust stratification.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, on the premise of not exceeding the technical scheme recorded in the claims also other variations and modifications.
Claims (8)
1. a kind of corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater, including air preheater babinet and multiple warm-up blocks, empty pre-
The high temperature flue and air duct for carrying out heat exchange are equipped in device babinet, multiple warm-up blocks are arranged in juxtaposition in empty pre-
In device babinet, air preheater partition board is equipped between adjacent warm-up block, each warm-up block includes several flat along high temperature flue
The high-temperature flue gas pipe of row arrangement, it is characterised in that：The air preheater babinet at air passage inlet be equipped with multiple air every
Latch device, each air baffle device correspond to a warm-up block, and the air preheater babinet is in high temperature flue exit
Equipped with flue gas recovery device, flue gas recovery device is connected to by circulating line with high temperature flue entrance.
2. corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater according to claim 1, it is characterised in that：The sky
Air bound latch device includes air register, main shaft and control unit, and air register is fixedly connected with main shaft, main shaft and air preheater babinet
Hinged, control unit is connect with spindle nose.
3. corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater according to claim 2, it is characterised in that：The master
Axis is parallel with high-temperature flue gas pipe.
4. corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater according to claim 2 or 3, it is characterised in that：It is described
The area of air register be less than or equal to the area at air passage inlet between adjacent air preheater partition board.
5. corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater according to claim 1, it is characterised in that：The cigarette
Gas recovering device includes wind turbine, flue gas collector, multiple flue gas branch pipes and the multiple gas fume valves coordinated with multiple flue gas branch pipes, wind
Machine one end connects circulating line, and the wind turbine other end connects flue gas collector, and flue gas collector passes through multiple flue gas branch pipes and high-temperature flue gas
Channel exit is connected to, and a flue gas branch pipe is arranged between adjacent air preheater partition board, a flue gas is arranged on each flue gas branch pipe
Valve, the quantity of flue gas branch pipe, the quantity of gas fume valve are identical as the quantity of warm-up block.
6. corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater according to claim 1, it is characterised in that：The sky
Pre- device babinet is additionally provided with the multiple flue gas retention devices coordinated with flue gas recovery device, Mei Geyan in high temperature flue exit
Vapour lock blocking means are set between a warm-up block and high temperature flue exit, and flue gas recovery device is located at flue gas blocking dress
It sets between warm-up block.
7. corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater according to claim 6, it is characterised in that：The cigarette
Vapour lock blocking means include gas baffle, gas baffle axis and gas baffle control unit, and gas baffle is fixed with gas baffle axis
Connection, gas baffle axis is hinged with air preheater babinet, and gas baffle control unit is connect with gas baffle shaft end.
8. corrosion-and blocking-prevention automatically cleaning vertical tubular air preheater according to claim 7, it is characterised in that：The cigarette
Gas damper shaft is vertical with high-temperature flue gas pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345406.1A CN108469036B (en) | 2018-04-17 | 2018-04-17 | Anti-corrosion anti-blocking self-cleaning vertical pipe type air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345406.1A CN108469036B (en) | 2018-04-17 | 2018-04-17 | Anti-corrosion anti-blocking self-cleaning vertical pipe type air preheater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108469036A true CN108469036A (en) | 2018-08-31 |
| CN108469036B CN108469036B (en) | 2024-04-05 |
Family
ID=63263403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810345406.1A Active CN108469036B (en) | 2018-04-17 | 2018-04-17 | Anti-corrosion anti-blocking self-cleaning vertical pipe type air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108469036B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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