CN106996577A - A kind of block-resistant type air preheater step-by-step arrangement system - Google Patents
A kind of block-resistant type air preheater step-by-step arrangement system Download PDFInfo
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- CN106996577A CN106996577A CN201710322985.3A CN201710322985A CN106996577A CN 106996577 A CN106996577 A CN 106996577A CN 201710322985 A CN201710322985 A CN 201710322985A CN 106996577 A CN106996577 A CN 106996577A
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/10—Intercepting solids by filters
- F23J2217/102—Intercepting solids by filters electrostatic
-
- 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
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- General Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
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Abstract
A kind of block-resistant type air preheater step-by-step arrangement system, including it is arranged in the high-temperature air preheater after boiler back end ductwork SCR denitration device；The flue gas of high-temperature air preheater outlet enters hot electrostatic precipitator through flue, and the flue gas of hot electrostatic precipitator outlet enters through flue again to be exchanged heat in low-temperature air preheater；Cold First air enters low-temperature air preheater through a cold air channel, air-supply enters low-temperature air preheater through air supply duct, cold First air and air-supply are absorbed after flue gas heat in low-temperature air preheater, enter the First air side and air-supply side entrance of high-temperature air preheater through middle temperature First air pipeline and middle temperature air supply duct respectively.Air preheater step-by-step arrangement system can fundamentally solve the stifled grey problem of air preheater in the present invention, so that exhaust gas temperature is effectively reduced, and wind-warm syndrome, a secondary air temperature can increase, and boiler thermal output gets a promotion.
Description
Technical field
The invention belongs to field of boilers, and in particular to a kind of block-resistant type air preheater step-by-step arrangement system.
Background technology
Air preheater (hereinafter referred to as " air preheater ") is as the visual plant of station boiler, and it is to utilize pot that it, which is acted on,
Air needed for the burning of stove tail flue gas heat.For rotary regenerative air preheater, if air preheater exchange capability of heat
Decline, on the one hand cause exhaust gas temperature to raise, heat loss due to exhaust gas increase, boiler thermal output reduction；Another aspect air is pre-
Hot device outlet heat primary air temperature reduction, if maintaining the pulverizer outlet temperature under given coal-supplying amount, then can cause First air
Amount increases, the increase of primary air fan consumption rate.Hot secondary air temperature reduction, then can influence the reduction of furnace flame temperature.
According to statistics, domestic most power plant face Ash Blocking in Air Preheater problem, air preheat during some power plant's high load capacities
Device fume side differential pressure is 2kPa~3kPa, causes blower fan consumption rate bigger than normal, has a strong impact on unit on-load ability, be forced dock
Reason.The decline of air preheater exchange capability of heat is mainly relevant with the stifled grey factor of air preheater heat accumulating element corrosion, causes air pre-
The reason for ash is blocked up in hot device heat accumulating element corrosion has two kinds.One kind is the stifled grey type of ammonium hydrogen sulfate corrosion；Another is low-temperature corrosion.Closely
The progressively implementation transformed over year with minimum discharge, domestic majority coal unit is provided with 3 layers of denitrating catalyst, realizes denitration
The raising of efficiency, denitrating system outlet NOx disclosure satisfy that no more than 50mg/m3It is required that, yet with the increasing of caltalyst accumulated amount
Plus, SO in flue gas2To SO3Conversion ratio rise, SO in flue gas3Concentration increase, in the case of a certain amount of the escaping of ammonia, causes denitration
System outlet ammonium hydrogen sulfate growing amount increases, (the conventional air preheater middle-temperature section when cigarette temperature is in 146 DEG C~230 DEG C of scopes
At low-temperature zone heat accumulating element) ammonium hydrogen sulfate be liquid, now the ammonium hydrogen sulfate of liquid cohere the fly ash granule in flue gas, cause
The stifled ash of air preheater corrosion.Additionally, due to SO in flue gas3Concentration increase, improves flue gas acid dew point, adds air preheat
The risk of device low-temperature zone heat accumulating element low-temperature corrosion.
The content of the invention
It is an object of the invention to provide a kind of block-resistant type air preheater step-by-step arrangement system, the system and conventional boiler
Air preheater system is compared, and can effectively control the stifled grey problem of air preheater heat accumulating element burn into.Air preheater is segmented
Arrangement system is by most of fly ash granule in flue gas and its SO of absorption2、SO3Removed, fly ash granule is dense in one side flue gas
Degree substantially reduction, controls liquid sulfuric acid hydrogen ammonium in air preheater heat accumulating element and coheres fly ash granule in flue gas and cause serious stifled
The trend of ash；SO in another aspect flue gas2、SO3Concentration is reduced, the reduction of flue gas acid dew point temperature, air preheater heat accumulating element hair
The risk of raw low-temperature corrosion declines, and ensures that the stifled grey problem of burn into does not occur for air preheater heat accumulating element under the two collective effect.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of block-resistant type air preheater step-by-step arrangement system, including be arranged in after boiler back end ductwork SCR denitration device
High-temperature air preheater, hot electrostatic precipitator and low-temperature air preheater；The flue gas of high-temperature air preheater outlet is through cigarette
Road enters hot electrostatic precipitator, and the flue gas of hot electrostatic precipitator outlet enters through flue again to be changed in low-temperature air preheater
Heat；Cold First air enters low-temperature air preheater through a cold air channel, and air-supply enters low-temperature air preheater through air supply duct, cold
First air and air-supply are absorbed after flue gas heat in low-temperature air preheater, respectively through middle temperature First air pipeline and middle temperature ajutage
Road enters the First air side and air-supply side entrance of high-temperature air preheater.
Further improve of the invention is that high-temperature air preheater is tubular air preheater or swinging air preheat
Device, low-temperature air preheater is rotary regenerative air preheater.
Further improve of the invention is, steam or sonic soot blowing are provided with the smoke inlet of high-temperature air preheater
Device, cigarette temperature alarm device and spraying system of fire fighting.
Further improve of the invention is, double medium soot blowers are provided with the smoke inlet of low-temperature air preheater.
Further improve of the invention is that low-temperature air preheater exiting flue gas is sequentially passed through after low temperature electric precipitation
Air-introduced machine after desulfurizer with discharging.
Of the invention further improve be, the entrance and exit of hot electrostatic precipitator is horn-like flue, and loudspeaker
Deflector is provided with shape flue.
Further improve of the invention is that the heat accumulating element of high-temperature air preheater is highly 800mm~1100mm.
Further improve of the invention is that the heat accumulating element of low-temperature air preheater is highly 1000mm.
Of the invention further improve be, flue, First air pipeline, middle temperature air supply duct, air supply duct and once
Some type metal expansion joints are arranged with air channel.
Further improve of the invention is that the elbow of flue is disposed with flue deflector.
Compared with prior art, the beneficial effects of the present invention are：
The present invention is empty by being provided with two air preheater systems connected, respectively high temperature in boiler smoke flow
Air preheater and low-temperature air preheater, are disposed with high temperature between high-temperature air preheater and low-temperature air preheater on flue
Hot electrostatic precipitator inlet flue gas temperature can be reduced to 250 DEG C by electric cleaner, the setting of high-temperature air preheater, on the one hand this temperature
Degree is higher compared with 230 DEG C of the temperature spot that gaseous sulfuric acid hydrogen ammonium is changed into liquid sulfuric acid hydrogen ammonium, flue-gas temperature is down to 230 DEG C of cigarettes before
Most of fly ash granule can be removed in gas, while sour gas (such as SO of the absorption on fly ash granule2、SO3) taken off in the lump
Remove, the fly ash granule content after hot electrostatic precipitator in flue gas is substantially reduced, even if NH in flue gas3With SO2, steam reaction
Generate ammonium hydrogen sulfate, but due in flue gas fly ash granule significantly reduce, liquid sulfuric acid hydrogen ammonium coheres fly ash granule and is attached to low temperature
The problem of heat accumulating element of air preheater, is controlled, and due to SO2Concentration is reduced, the reduction of flue gas acid dew point temperature, hence it is evident that
Improve low-temperature air preheater running environment.The accumulation of heat member of high-temperature air preheater and low-temperature air preheater in the present invention
Part heat exchange area is identical with conventional air preheater, but air preheater step-by-step arrangement system can fundamentally solve air
The stifled grey problem of preheater, so that exhaust gas temperature is effectively reduced, and wind-warm syndrome, a secondary air temperature can increase, boiler thermal effect
Rate gets a promotion.
Further, for conventional air preheater, high-temperature air preheater and low-temperature air preheater accumulation of heat
Element heights are 800mm~1100mm, and height is only conventional air preheater heat accumulating element mid-height or so, even if high temperature is empty
Air preheater, low-temperature air preheater still suffer from slight stifled grey problem, because low-temperature air preheater heat accumulating element highly has
Limit, low-temperature air preheater soot blower can effectively penetrate whole heat accumulating element, reach preferable soot blowing effect.
Further, because the exit gas temperature of high-temperature air preheater 1 is higher than 230 DEG C, the ammonium hydrogen sulfate under this cigarette temperature
For gaseous state, cause to block up the situation of ash in the absence of fly ash granule is cohered.The heat primary air temperature of the outlet of high-temperature air preheater 1, air-supply
Temperature disclosure satisfy that boiler milling system and combustion requirements.
Brief description of the drawings
Fig. 1 is block-resistant type air preheater step-by-step arrangement system schematic of the present invention；
Wherein, 1 is high-temperature air preheater, and 2 be low-temperature air preheater, and 3 be hot electrostatic precipitator, and 4 be flue, and 5 are
Ash bucket, 6 be steam or acoustic wave ash ejector, and 7 be type metal expansion joint, and 8 be middle temperature First air pipeline for double medium soot blowers, 9, and 10 are
Middle temperature air supply duct, 11 be air supply duct, and 12 be cold First air pipeline, and 13 be deflector；14 be insulator chamber, and 15 lead for flue
Flow plate.
Embodiment
The present invention is described in further details below in conjunction with the accompanying drawings.
Referring to Fig. 1, the present invention is based on arrangements different from conventional air preheater, proposes a kind of block-resistant type air preheat
Device step-by-step arrangement system, it is therefore an objective on the basis of boiler thermal output is not influenceed, thoroughly improves the work of air preheater heat accumulating element
Environment, to tackle the stifled grey problem of air preheater generally existing after SCR denitration device puts into operation.
The system includes high-temperature air preheater 1, hot electrostatic precipitator 3 and low-temperature air preheater 2.Cryogenic air is pre-
Hot device 2 is arranged in before low temperature electric cleaner, and the fume side between high-temperature air preheater and low-temperature air preheater is disposed with high temperature
Electric cleaner, the wind side between high-temperature air preheater and low-temperature air preheater is disposed with middle temperature First air pipeline 9 and middle temperature is sent
Wind pipeline 10.
High-temperature air preheater and low-temperature air preheater are arranged in boiler tail flue gas flow.High-temperature air preheater
1 is arranged in after conventional boiler back-end ductwork SCR denitration device, and the cigarette temperature into high-temperature air preheater 1 is about 350 DEG C or so,
After being exchanged heat through high-temperature air preheater 1, flue-gas temperature is reduced to about 250 DEG C.Due to the exit gas temperature of high-temperature air preheater 1
Higher than 230 DEG C, ammonium hydrogen sulfate is gaseous state under this cigarette temperature, causes to block up the situation of ash in the absence of fly ash granule is cohered.High temperature air
The exiting flue gas of preheater 1 enters hot electrostatic precipitator 3 through flue 4, and hot electrostatic precipitator 3 exports cleaner flue gas and passes through cigarette again
Road 4 enters to be exchanged heat in low-temperature air preheater 2.The exiting flue gas of low-temperature air preheater 2 again after low temperature electric precipitation according to
Secondary process air-introduced machine, desulfurizer, from chimney discharge.Most of fly ash granule is removed in flue gas in hot electrostatic precipitator 3,
Sour gas (such as SO on fly ash granule is adsorbed simultaneously2、SO3) be removed in the lump, after hot electrostatic precipitator 3 in flue gas
Fly ash granule content is substantially reduced, even if NH in flue gas3With SO2, steam reaction generation ammonium hydrogen sulfate, but due in flue gas fly
Ash particle is significantly reduced, and liquid sulfuric acid hydrogen ammonium coheres the problem of fly ash granule is attached to the heat accumulating element of low-temperature air preheater 2
Controlled.
The cold First air (i.e. pressure-air) of primary air fan outlet enters low-temperature air preheater 2 through a cold air channel 12,
Air-supply enters low-temperature air preheater 2 through pressure fan, air supply duct 11, and cold First air and air-supply are in low-temperature air preheater 2
Absorb after flue gas heat, enter high-temperature air preheater 1 once through middle temperature First air pipeline 9 and middle temperature air supply duct 10 respectively
Wind side and air-supply side entrance, the heat primary air temperature of the outlet of high-temperature air preheater 1, wind pushing temperature disclosure satisfy that boiler milling system
And combustion requirements.
High-temperature air preheater 1 can be rotary regenerative air preheater or tubular air preheater, low-temperature air preheater 2
For rotary regenerative air preheater, rotary regenerative air preheater includes two sets of transmission devices of major-minor, guide bearing and thrust bearing, fan
Shape plate, stppage alarm device etc..The sealing device of rotary regenerative air preheater can select fixed sealing or flexible sealing etc..
According to boiler combustion needs, rotary regenerative air preheater can be two Fen Cang, three points of storehouses or four points of storehouses.
When high-temperature air preheater 1 is rotary regenerative air preheater, its heat accumulating element is highly 800mm~1100mm or suitable
When height, heat accumulating element template is using the wide template (such as DU) of business application.The exiting flue gas temperature of high-temperature air preheater 1
About 250 DEG C or so of degree, to ensure that the cigarette temperature into hot electrostatic precipitator 3 is higher than 230 DEG C, it is to avoid due to cigarette temperature drop as little as 230
When below DEG C, gaseous sulfuric acid hydrogen ammonium is converted into liquid, coheres stifled ash under the higher flue gas environment of fly ash granule content and asks
Topic.Steam or acoustic wave ash ejector 6, cigarette temperature alarm device and fire-fighting spraying are provided with the smoke inlet of high-temperature air preheater 1
System.
The heat accumulating element of low-temperature air preheater 2 is highly 1000mm or so or appropriate height, and heat accumulating element plating enamel stores
Thermal element template can be using the wide fat pipe of business application, big wave mode template.At the smoke inlet of low-temperature air preheater 2
It is provided with double medium soot blowers 8.
The present invention in boiler tail SCR denitration device exhaust pass by arranging high-temperature air preheater, and flue gas is through high temperature
As little as 250 DEG C or so of cigarette temperature drop after air preheater, the flue gas of high-temperature air preheater outlet passes through hot electrostatic precipitator, high temperature
Electric cleaner removes most of fly ash granule in flue gas under about 250 DEG C of cigarette temperature, and in the process due to fly ash granule
Suction-operated, acid gas in flue gas SO2、SO3Removed in the lump Deng with fly ash granule.Hot electrostatic precipitator exiting flue gas
Pass through low-temperature air preheater again, now into fly ash granule content, SO in the flue gas of low-temperature air preheater2And SO3Concentration
It has been reduced that, even if NH in flue gas3With SO2, steam reaction generation ammonium hydrogen sulfate, but due in flue gas fly ash granule significantly reduce,
Liquid sulfuric acid hydrogen ammonium coheres the problem of fly ash granule is attached to air preheater heat accumulating element and controlled, and due to SO2Concentration
Reduction, flue gas acid dew point temperature reduction, the risk of low-temperature air preheater heat accumulating element low-temperature corrosion is controlled.Cold First air
Pipe, air supply duct correspondence are connected to the First air of low-temperature air preheater, air-supply side, primary air fan, the cold wind of pressure fan outlet
High-temperature air preheater is introduced after being heated by low-temperature air preheater, then by middle temperature primary air piping, middle temperature ajutage correspondence
First air, air-supply side, high-temperature air preheater outlet heat primary air temperature, wind pushing temperature disclosure satisfy that boiler milling system and
Combustion requirements.
To ensure flue, air channel swell increment, the flue 4 of arrangement, cold air channel 12, an air supply duct in the process of running
11st, middle temperature First air pipeline 9, some type metal expansion joints 7 are arranged with middle temperature air supply duct 10, with extraction duct because heat expansion is cold
The change of size produced by the reasons such as contracting.
At the import of hot electrostatic precipitator 3 and exit is to be disposed with deflector 13 in horn-like flue, horn-like flue,
So that the flue gas into hot electrostatic precipitator 3 is uniform.The operating temperature of hot electrostatic precipitator 3 is at 250 DEG C or so, and high-temperature electric
1~2 electric field, including insulator chamber 14, positive plate, cathode line, rapping apparatus and ash bucket 5 etc. are set in deduster 3.Low temperature
Electric cleaner is arranged in the flue after low-temperature air preheater.
The inlet flue duct elbow of high temperature electric precipitation 3 and exhaust pass elbow are that the elbow of flue 4 is arranged with flue
Deflector 15.
The present invention has advantages below：
(1) air preheater system of two series connection is provided with boiler smoke flow, respectively high temperature air is preheated
Device and low-temperature air preheater.Hot electrostatic precipitator inlet flue gas temperature can be reduced to 250 DEG C by the setting of high-temperature air preheater,
So that the cigarette temperature into hot electrostatic precipitator is higher than 230 DEG C, on the one hand this temperature is changed into liquid sulfuric acid compared with gaseous sulfuric acid hydrogen ammonium
230 DEG C of the temperature spot of hydrogen ammonium is higher, flue-gas temperature is down to before 230 DEG C most of fly ash granule in flue gas and removes, keeps away
When exempting from due to as little as less than 230 DEG C of cigarette temperature drop, gaseous sulfuric acid hydrogen ammonium is converted into liquid, in the higher flue gas ring of fly ash granule content
Stifled grey problem is cohered under border, hence it is evident that improve low-temperature air preheater running environment.
(2) for conventional air preheater, high-temperature air preheater and low-temperature air preheater heat accumulating element are high
Degree is only conventional air preheater heat accumulating element mid-height or so, even if high-temperature air preheater, low-temperature air preheater are still
In the presence of slight stifled grey problem, due to low-temperature air preheater heat accumulating element limited height, low-temperature air preheater soot blower energy
It is enough effectively to penetrate whole heat accumulating element, reach preferable soot blowing effect.
(3) air preheater heat accumulating element heat exchange area is consistent compared with conventional air preheater, but air preheater point
Section arrangement system can fundamentally solve the stifled grey problem of air preheater, so that exhaust gas temperature is effectively reduced, and once
Wind-warm syndrome, secondary air temperature can increase, and boiler thermal output gets a promotion.Because air preheater of the present invention can effectively solve air
The stifled grey problem of preheater, flue gas collateral resistance in reduction operation, blower fan consumption rate is substantially reduced.
Claims (10)
1. a kind of block-resistant type air preheater step-by-step arrangement system, it is characterised in that taken off including being arranged in boiler back end ductwork SCR
High-temperature air preheater (1), hot electrostatic precipitator (3) and low-temperature air preheater (2) after nitre device；High temperature air is preheated
The flue gas of device (1) outlet enters hot electrostatic precipitator (3) through flue (4), and the flue gas of hot electrostatic precipitator (3) outlet is again through flue
(4) exchanged heat into low-temperature air preheater (2) is middle；Cold First air enters low-temperature air preheater through a cold air channel (12)
(2), air-supply enters low-temperature air preheater (2) through air supply duct (11), and cold First air and air-supply are in low-temperature air preheater (2)
After middle absorption flue gas heat, enter high-temperature air preheater through middle temperature First air pipeline (9) and middle temperature air supply duct (10) respectively
(1) First air side and air-supply side entrance.
2. a kind of block-resistant type air preheater step-by-step arrangement system according to claim 1, it is characterised in that high temperature air
Preheater (1) is tubular air preheater or rotary regenerative air preheater, and low-temperature air preheater (2) is swinging air preheat
Device.
3. a kind of block-resistant type air preheater step-by-step arrangement system according to claim 1, it is characterised in that high temperature air
Steam or acoustic wave ash ejector (6), cigarette temperature alarm device and spraying system of fire fighting are provided with the smoke inlet of preheater (1).
4. a kind of block-resistant type air preheater step-by-step arrangement system according to claim 1, it is characterised in that Cryogenic air
Double medium soot blowers (8) are provided with the smoke inlet of preheater (2).
5. a kind of block-resistant type air preheater step-by-step arrangement system according to claim 1, it is characterised in that Cryogenic air
Preheater (2) exiting flue gas sequentially passes through air-introduced machine with being discharged after desulfurizer after low temperature electric precipitation.
6. a kind of block-resistant type air preheater step-by-step arrangement system according to claim 1, it is characterised in that high-temperature electric is removed
The entrance and exit of dirt device (3) is to be provided with deflector (13) in horn-like flue, and horn-like flue.
7. a kind of block-resistant type air preheater step-by-step arrangement system according to claim 1, it is characterised in that high temperature air
The heat accumulating element of preheater (1) is highly 800mm~1100mm.
8. a kind of block-resistant type air preheater step-by-step arrangement system according to claim 1, it is characterised in that Cryogenic air
The heat accumulating element of preheater (2) is highly 1000mm.
9. a kind of block-resistant type air preheater step-by-step arrangement system according to claim 1, it is characterised in that flue (4),
Some metals are arranged with First air pipeline (9), middle temperature air supply duct (10), air supply duct (11) and an air channel (12)
Expansion joint (7).
10. a kind of block-resistant type air preheater step-by-step arrangement system according to claim 1, it is characterised in that flue (4)
Elbow be disposed with flue deflector (15).
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| CN107388278A (en) * | 2017-08-07 | 2017-11-24 | 张玉伟 | A kind of stifled rotary regenerative air preheater rotor of anti-product |
| CN107606629A (en) * | 2017-10-26 | 2018-01-19 | 北京启创天工电力技术应用有限公司 | A kind of anti-blocking grey ammonium hydrogen sulfate vaporization heater of SCR denitration unit air preheater |
| CN107965787A (en) * | 2017-11-22 | 2018-04-27 | 西安交通大学 | System and method for the classification rotary regenerative air preheater for mitigating ammonium hydrogen sulfate deposition |
| CN107965787B (en) * | 2017-11-22 | 2019-06-11 | 西安交通大学 | For mitigating the system and method for the classification rotary regenerative air preheater of ammonium hydrogen sulfate deposition |
| CN110440282A (en) * | 2019-07-17 | 2019-11-12 | 华电电力科学研究院有限公司 | The energy-saving anti-blocking type air preheater system and its working method of tubular type and the combination of two warehouse separated type rotary regenerative air preheaters |
| CN113566209A (en) * | 2021-06-23 | 2021-10-29 | 联盛纸业（龙海）有限公司 | Method and system for inhibiting low-temperature corrosion of boiler air preheater |
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