CN107642793A - Prevent ammonium hydrogen sulfate from blocking the system and method for air preheater after SCR denitration transformation - Google Patents
Prevent ammonium hydrogen sulfate from blocking the system and method for air preheater after SCR denitration transformation Download PDFInfo
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- CN107642793A CN107642793A CN201710644456.5A CN201710644456A CN107642793A CN 107642793 A CN107642793 A CN 107642793A CN 201710644456 A CN201710644456 A CN 201710644456A CN 107642793 A CN107642793 A CN 107642793A
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- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 230000009466 transformation Effects 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000000903 blocking effect Effects 0.000 title abstract description 16
- 230000001172 regenerating effect Effects 0.000 claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 20
- 239000003245 coal Substances 0.000 claims abstract description 19
- 239000000779 smoke Substances 0.000 claims abstract description 7
- 239000003546 flue gas Substances 0.000 claims description 45
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 41
- 230000008676 import Effects 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 208000011580 syndromic disease Diseases 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 235000019504 cigarettes Nutrition 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 210000003298 dental enamel Anatomy 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000001131 transforming effect Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 15
- 238000010348 incorporation Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 18
- 239000000428 dust Substances 0.000 description 11
- 229910021529 ammonia Inorganic materials 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000013517 stratification Methods 0.000 description 6
- 239000002956 ash Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 235000019593 adhesiveness Nutrition 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-M hydrogensulfate Chemical compound OS([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
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- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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Classifications
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- 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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- Air Supply (AREA)
- Chimneys And Flues (AREA)
Abstract
Prevent ammonium hydrogen sulfate from blocking the system and method for air preheater after being transformed the present invention relates to a kind of SCR denitration.Present system, by cancelling cold section of heating surface area of traditional rotary regenerative air preheater, to improve air preheater entirety heating surface mean temperature, prevent the stifled ash of air preheater ammonium hydrogen sulfate, the low-pressure low-temperature economizer connected simultaneously by being arranged in deduster to air-introduced machine in flue absorbs smoke discharging residual heat and controls exhaust gas temperature, improve unit economy, and installed in cold one, steam air heater on secondary air duct is realized exports heat one to air preheater, the control of secondary air temperature, ensure on the premise of hot secondary air temperature slightly reduces, reduce heat primary air incorporation cold blast rate, reduce exhaust gas temperature, improve boiler efficiency.Ammonium hydrogen sulfate blocks rotary regenerative air preheater after the present invention can not only solve the problems, such as the transformation of coal-burning boiler SCR denitration, can also save net coal consumption rate 1.1g/kwh.
Description
Technical field
The system for preventing ammonium hydrogen sulfate from blocking air preheater after being transformed the present invention relates to a kind of SCR denitration.
Background technology
With increasingly harsh, selective catalytic reduction (SCR) conduct of coal-burning power plant's pollutant emission standard
Most effective removing gas pollutant NO industrial at presentXMethod, be now widely used among coal-fired power station boiler.SCR denitration
Technology is in catalyst vanadic anhydride (V2O5) in the presence of, with NH3For reducing agent, by the NO in flue gasXIt is reduced into N2With
H2O.SCR denitration device is in flue before air preheater after boiler economizer.Only allow in SCR denitration Technology design
3ppm ammonia escape amount, but due to not reliable ammonia escape amount control method in actual moving process, so mesh
The problem of ammonia escape amount is exceeded all be present in preceding most of SCR denitration device.
The ammonia of escape can be with SO a small amount of in flue gas3Reaction generation ammonium hydrogen sulfate (ABS), ABS adhesivenesses are very strong and have
It is corrosive, dew point is generally 200 DEG C.Gaseous ABS will not have an impact with flow of flue gas to air preheater, but liquid
ABS there is extremely strong flying dust capturing ability, can be bonding with the fly ash granule in flue gas, be attached to Air Preheater Heating Surface
Upper formation dust stratification, so as to cause the corrosion of air preheater and block up the problems such as grey.It can not only increase after Ash Blocking in Air Preheater and draw
The power consumption of blower fan, the economy of boiler motion is influenceed, violent boiler negative pressure fluctuation, primary air fan and air-supply will be also caused when serious
Machine stall, tack, supply oxygen the problems such as insufficient, jeopardizing unit safety operation.In addition, the catalyst V in SCR denitration device2O5May be used also
With by the SO in flue gas2It is converted into SO3, it has been further exacerbated by air preheater corrosion and has blocked up the possibility of ash.Pass through SCR at present
All there is similar situation substantially in improved power plant, therefore, after the transformation of coal-burning boiler SCR denitration, how to prevent hydrogen sulfate
Ammonium blocks air preheater turns into urgent problem to be solved.
After the transformation of boiler SCR denitration device, when air preheater corrodes and stifled grey problem occurs, usually not very well
Solution method.From boiler operatiopn angle, air preheater clogging-preventing measures mainly include：1. control as-fired coal sulphur content not exceeded,
Reduce SO in flue gas3Growing amount, reduce flue gas acid dew point；2. optimizing and revising spray ammonia system, ensure flue gas flow field and spray the equal of ammonia
Even property, reduce the escaping of ammonia rate；3. control SCR imports NOXContent, so as to avoid excessive spray ammonia.Although each power plant is in boiler operatiopn
In all taken into full account and take above-mentioned measure, but be still difficult to avoid that Ash Blocking in Air Preheater is asked in boiler actual motion
The appearance of topic.Slave unit angle, air preheater was pre- to solve air by installing online soot blowing and water flushing device in recent years
Hot device blocks up grey problem.Operative practice shows：Soot blowing and water, which rinse, can not all reach good ash-removal effect.It is to find out its cause, online
It is that interval puts into operation that soot blowing and water, which rinse, but when ABS bonds flying dust and is attached in Air Preheater Heating Surface, if cannot
Cleaning in time, dust stratification are difficult to be eliminated by lump is formed.Counter-measure is additionally included in air preheater gas approach installation recently
Alkaline dry powder spray gun, SO in flue gas is removed by neutralization reaction3, so as to prevent the stifled ashes of air preheater ABS.It this method increase
The investment of unit and operating cost, to sacrifice unit economy as cost.
In view of above-mentioned, the design people is actively subject to research and innovation, and hydrogen sulfate is prevented to found after a kind of SCR denitration is transformed
The system that ammonium blocks air preheater, make it with more the value in industry.
The content of the invention
In order to solve the above technical problems, prevent ABS from blocking up after being applied to SCR denitration transformation it is an object of the invention to provide one kind
The system of rotary regenerative air preheater is filled in, after solving to transform because of SCR denitration in the prior art, causes ABS to corrode and block empty
The defects of air preheater
The system that ammonium hydrogen sulfate blocks air preheater is prevented after SCR denitration transformation of the present invention, including：Along the flue gas side of flowing through
To coal-burning boiler, SCR denitration device, air preheater, deduster, low-pressure low-temperature economizer, air-introduced machine, the cigarette set gradually
Chimney, wherein the air preheater includes air preheater high temperature section, the air preheater middle-temperature section being sequentially communicated, the SCR
The outlet flue of denitrification apparatus connects air preheater high temperature section import, the air preheater by air preheater import flue
High temperature section air outlet is also communicated with heat primary air road and hot secondary air duct, and the outlet flue of the air preheater middle-temperature section passes through sky
Air preheater exhaust pass connects deduster smoke inlet, and the air preheater middle-temperature section air inlet is also communicated with a cold air channel
With cold secondary air duct, First air steam air heater, Secondary Air steam air heater are separately installed with a cold air channel and cold secondary air duct；Air
The flue-gas temperature of the exhaust pass of preheater middle-temperature section is not less than 200 DEG C.
Further, described low-pressure low-temperature economizer and deduster reversing of position flue gas first pass through low-pressure low-temperature and save coal
Device, then exported by deduster, the outlet flue of the air preheater middle-temperature section is low by the connection of air preheater exhaust pass
Press low-level (stack-gas) economizer smoke inlet.
Further, the low-pressure low-temperature economizer includes ABS condensation sections and acid-proof dew section, the outlet of the acid-proof dew section
Flue-gas temperature is controlled at 80-90 DEG C.
Further, the ABS condensations section of the low-pressure low-temperature economizer uses steel-tube construction, and the material that ABS condenses section is adopted
Examined with High-Strength Low-Alloy and step on steel, surface plates enamel or provided with silicon making coatings, the acid-proof dew section of the low-pressure low-temperature economizer
Using fin tube structure.
Further, the water side connection steamer pusher side heat regenerative system low-pressure heater of the low-pressure low-temperature economizer, low pressure
Low-level (stack-gas) economizer inlet water temperature is controlled 5 DEG C -10 DEG C on flue gas acid dew point temperature, the water inlet pipe of the low-pressure low-temperature economizer
Road is provided with water pump.
To reach above-mentioned purpose, the method that ammonium hydrogen sulfate blocks air preheater is prevented after SCR denitration transformation of the present invention, is fitted
System for preventing ammonium hydrogen sulfate from blocking air preheater after the SCR denitration transformation described in claim 1 or 2, methods described
Including：Coal-burning boiler output flue gas successively by SCR denitration device, air preheater, deduster, low-pressure low-temperature economizer,
Air-introduced machine, chimney；Or the flue gas of coal-burning boiler output saves coal by SCR denitration device, air preheater, low-pressure low-temperature successively
Device, deduster, air-introduced machine, chimney；
When a cold air channel steam air heater does not put into operation, heat primary air says one's intention as revealed in what one says temperature and reaches 230 DEG C -240 DEG C, is fired in boiler
When the moisture of burning coal is less than predetermined threshold, a cold air channel steam air heater does not put into operation, and heat primary air does not have to mix cold wind；In boiler
When the moisture of burning coal is greater than or equal to predetermined threshold, the steam air heater installed on a cold air channel is opened, raising is cold once
Air channel import wind-warm syndrome, one's intention as revealed in what one says temperature is said so as to improve heat primary air；
When cold secondary air duct warm-air drier does not put into operation, hot secondary air duct outlet wind-warm syndrome reaches 240 DEG C；Open and be arranged on cold two
Steam air heater on secondary air channel, by improving cold secondary air duct import wind-warm syndrome, improve hot secondary air duct outlet wind-warm syndrome；
In running, control low-pressure low-temperature economizer inlet water temperature is low 5 DEG C -10 DEG C on flue gas acid dew point temperature
Warm economizer exit flue-gas temperature control is forced down at 80-90 DEG C.
Compared with prior art, prevent ammonium hydrogen sulfate from blocking the system tool of air preheater after SCR denitration transformation of the present invention
Have the advantage that：
ABS is liquid in 146 DEG C of -207 DEG C of temperature ranges, a height of gaseous state of temperature.Therefore the present invention is pre- using air is improved
The method of hot device heating surface temperature, to avoid condensations of the ABS in air preheater surfaces, so as to prevent ABS bonds flying dust from blocking
Air preheater.
(1) by cancelling the area of cold section of heating surface of air preheater, to prevent ABS in Air Preheater Heating Surface
Condense, because air preheater exhaust gas temperature is up to 200 DEG C -210 DEG C after cancelling cold section, so that air preheater integral wall
Face temperature can all be higher than ABS dew-point temperatures, so ABS will not condense on the heating surface of air preheater, can thoroughly solve
Because of the SO in the ammonia and flue gas of escape after SCR denitration transformation3React production ABS air preheater condense and caused by
The problems such as corrosion and blocking.
(2) by connecting the low-pressure low-temperature economizer in flue between deduster and air-introduced machine, to absorb smoke evacuation
Waste heat, after low-pressure low-temperature economizer, exhaust gas temperature can be reduced to 80 DEG C -90 DEG C, can save net coal consumption rate 0.7g/kwh.
After being arranged in deduster due to low-pressure low-temperature economizer, and corrosion protection design and material are employed, can keep from heat face appearance
Corrosion and clogging phenomenon caused by ABS condenses.
(3) low-pressure low-temperature economizer water side inlet and outlet can steamer pusher side heat regenerative system low-pressure heater and its pipeline it
Between select suitable point, so that condensate can not only be made to obtain the waste heat energy of GOOD TASTE, low-pressure low-temperature economizer tube can also be made
Wall temperature is higher than flue gas acid dew point temperature, and due to being that flue gas exchanges heat with water in low-pressure low-temperature economizer, the coefficient of heat transfer is than empty
Air and flue gas heat exchange in air preheater is big, so low-pressure low-temperature economizer can be saved when reclaiming same flue gas heat
Heating surface area.
(4) on the premise of ensureing that hot secondary air temperature slightly reduces, heat primary air incorporation cold blast rate is reduced, makes cold one, two
Secondary wind reduces 5-10 DEG C of exhaust gas temperature more by boiler is entered after air preheater, so as to reach, and improves boiler effect
Rate, net coal consumption rate 0.4g/kwh can be saved, simultaneously, moreover it is possible in the case of boiler combustion colm, pass through the cold First air that puts into operation
Steam air heater on pipeline, so as to improve the requirement that heat primary air temperature meets pulverized coal preparation system drying capacity.
To sum up, ABS blocks rotary regenerative air preheater after the present invention can not only solve the transformation of coal-burning boiler SCR denitration
Problem, net coal consumption rate 1.1g/kwh can also be saved.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description of the drawings
Fig. 1 is to prevent ammonium hydrogen sulfate from blocking the embodiment 1 of the system of air preheater and illustrating after SCR denitration of the present invention is transformed
Figure；
Fig. 2 is to prevent ammonium hydrogen sulfate from blocking the embodiment 2 of the system of air preheater and illustrating after SCR denitration of the present invention is transformed
Figure；
Wherein, 1, coal-burning boiler, 2, SCR denitration device, 3, rotary regenerative air preheater high temperature section, 4, swinging air it is pre-
Hot device middle-temperature section, 5, heat primary air road, 6, hot secondary air duct, 7, air preheater import flue, 8, a cold air channel, 9, cold two
Secondary air channel, 10, air preheater exhaust pass, 11, deduster, 12, low-pressure low-temperature economizer, 13, air-introduced machine, 14, chimney,
15th, First air steam air heater, 16, Secondary Air steam air heater, 17, Steam Turbine Regenerative System low-pressure heater, 18, water pump.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
The present invention improves exhaust gas temperature by reducing the area of Air Preheater Heating Surface first, pre- so as to solve air
Hot device ABS blocks up grey problem.Secondly, by connecting the low-pressure low-temperature economizer in flue installed in deduster to air-introduced machine, absorb
The waste heat of smoke evacuation reaches the purpose of control exhaust gas temperature, and after being arranged in deduster due to low-pressure low-temperature economizer, so base
Originally the appearance of heating surface clogging phenomenon is avoided.Finally, by arranging the steam air heater on cold first and second air channel, to realize to sky
The control of hot first and second wind-warm syndrome in air preheater outlet, so as to meet what is burnt in boiler milling system drying capacity and Boiler Furnace
It is required that.
The present invention can effectively prevent the air preheater ABS brought because SCR denitration device is transformed from blocking up the problem of grey；
By installing low-pressure low-temperature economizer after deduster, the stifled ash in the face that can not only keep from heat, boiler exhaust gas temperature can also be reduced
Degree, improve the economy of unit；It is cold can to reduce pulverized coal preparation system on the premise of the hot secondary air temperature of basic guarantee air preheater
Wind incorporation, improve boiler efficiency.
Embodiment 1
As shown in figure 1, the system that ammonium hydrogen sulfate blocks air preheater is prevented after the transformation of the present embodiment SCR denitration, including：
It is low by coal-burning boiler 1, SCR denitration device 2, rotary regenerative air preheater, deduster 11, low pressure successively that direction is flowed through along flue gas
Warm economizer 12, air-introduced machine 13 and chimney 14.Rotary regenerative air preheater is by rotary regenerative air preheater high temperature section 3 and revolution
4 two sections of compositions of regenerative air heater middle-temperature section, rotary regenerative air preheater middle-temperature section 4 are provided with air preheater exhaust pass 10
And a cold air channel 8 and cold secondary air duct 9, rotary regenerative air preheater high temperature section 3 are provided with air preheater import flue 7
And heat primary air road 5 and hot secondary air duct 6.First air steam air heater is installed respectively on a cold air channel 8 and cold secondary air duct 9
15th, Secondary Air steam air heater 16.Air preheater import flue 7 is connected with SCR denitration device 2, air preheater exhaust pass
10 are connected with deduster 11.It is connected in deduster 11 with air-introduced machine 13 on flue and low-pressure low-temperature economizer 12 is set, it is cooled down
Medium is from Steam Turbine Regenerative System low-pressure heater 17.During operation, the flue-gas temperature of fume side air preheater import flue 7
For 340 DEG C -350 DEG C, the flue-gas temperature of exhaust pass 10 is 200 DEG C -210 DEG C；The input gas temperature of low-pressure low-temperature economizer 12 is
190 DEG C -200 DEG C, exit gas temperature is 80 DEG C -90 DEG C.Air side works as boiler combustion colm, a cold air channel 8 and cold two
First air steam air heater 15, Secondary Air steam air heater 16 on secondary air channel 9 put into operation, into the cold of rotary regenerative air preheater middle-temperature section 4
First and second air temperature is 40-50 DEG C, and air preheater outlet heat primary air road 5, the wind-warm syndrome of hot secondary air duct 6 are 270-280 DEG C.
The simple system is easy to implement, suitable newly constructed boiler, the transformation for active service boiler, and construction is also simple, but suitable for deduster and
The boiler that air-introduced machine has surplus is transformed.
In the present embodiment, after being arranged in deduster due to low-pressure low-temperature economizer, most flying dusts is divided in flue gas
From so substantially avoided heating surface there is the clogging caused by dust stratification.
Embodiment 2
The method for preventing ammonium hydrogen sulfate from blocking air preheater after the transformation of the present embodiment SCR denitration, suitable for embodiment 1
The system that ammonium hydrogen sulfate blocks air preheater is prevented after described SCR denitration transformation, methods described includes：Coal-burning boiler exports
Flue gas successively by SCR denitration device, air preheater, deduster, low-pressure low-temperature economizer, air-introduced machine, chimney；
Described air preheater installs steam air heater on a cold air channel.After Air Preheater Heating Surface is reduced, cold one
When secondary air channel steam air heater does not put into operation, heat primary air says one's intention as revealed in what one says temperature and can reach 230 DEG C -240 DEG C or so, therefore, in boiler combustion
During the relatively low coal of moisture, heat primary air can not have to mix cold wind, it is possible to meet pulverized coal preparation system drying capacity.But work as boiler
When burning low grade coal moisture is higher, air preheater cold one can be improved by opening the steam air heater installed on a cold air channel
Secondary air channel import wind-warm syndrome, one's intention as revealed in what one says temperature is said so as to improve heat primary air, reaches the requirement for meeting pulverized coal preparation system drying capacity.
Steam air heater is installed on the cold secondary air duct of described air preheater.After Air Preheater Heating Surface is reduced, cold two
When secondary air channel warm-air drier does not put into operation, hot secondary air duct outlet wind-warm syndrome can reach 240 DEG C or so.Hot secondary air temperature, which reduces, can influence pot
Combustion process in stove stove, therefore, the steam air heater on cold secondary air duct need to be opened, by improving cold secondary air duct import
Wind-warm syndrome, hot secondary air duct outlet wind-warm syndrome is improved, so as to reduce the influence to being burnt in Boiler Furnace.
Described low-pressure low-temperature economizer is arranged in deduster into the connection flue of air-introduced machine, and Bottomhole pressure is less than
The water of saturation temperature, come from the low-pressure heater of Steam Turbine Regenerative System.Low-pressure low-temperature economizer is divided to two sections, respectively high temperature
Section and low-temperature zone.High temperature section uses steel-tube construction, and wall surface temperature is less than ABS dew-point temperatures, condenses section for ABS.It is heated to improve
The anti-corrosion capability in face, material are examined using High-Strength Low-Alloy and step on steel, and surface plates enamel or uses silicon making coatings.Low-temperature zone is adopted
With fin tube structure, wall surface temperature is higher than flue gas acid dew point temperature, reveals section for acid-proof, material uses ordinary carbon steel.Running
In, by controlling low-pressure low-temperature economizer inlet water temperature 5 DEG C -10 DEG C on flue gas acid dew point temperature, to prevent that low-temperature zone is low
The generation of warm corrosion phenomenon.After being arranged in deduster due to low-pressure low-temperature economizer, most flying dusts is separated in flue gas,
So substantially avoided heating surface there is the clogging caused by dust stratification.Low-pressure low-temperature economizer exit flue-gas temperature controls
At 80-90 DEG C or so.
Embodiment 3
As shown in Fig. 2 the system that ammonium hydrogen sulfate blocks air preheater is prevented after the transformation of the present embodiment SCR denitration, including：
Direction is flowed through successively by coal-burning boiler 1, SCR denitration device 2, rotary regenerative air preheater, low-pressure low-temperature economizer along flue gas
12nd, deduster 11, air-introduced machine 13 and chimney 14.Rotary regenerative air preheater is by rotary regenerative air preheater high temperature section 3 and returns
4 two sections of compositions of rotary air preheater middle-temperature section, rotary regenerative air preheater middle-temperature section 4 are provided with air preheater exhaust pass
10 and a cold air channel 8 and cold secondary air duct 9, rotary regenerative air preheater high temperature section 3 be provided with air preheater import cigarette
Road 7 and heat primary air road 5 and hot secondary air duct 6.First air warm wind is installed respectively on a cold air channel 8 and cold secondary air duct 9
Device 15, Secondary Air steam air heater 16.Air preheater import flue 7 is connected with SCR denitration device 2, air preheater outlet cigarette
Road 10 is connected with low-pressure low-temperature economizer 12.Rotary regenerative air preheater 3,4 be connected on flue with deduster 11 set it is low
Low-level (stack-gas) economizer 12 is pressed, its cooling medium is from Steam Turbine Regenerative System low-pressure heater 17.During operation, fume side air is pre-
The hot flue-gas temperature of device inlet flue duct 7 is 340 DEG C -350 DEG C, and the flue-gas temperature of exhaust pass 10 is 200 DEG C -210 DEG C；Low-pressure low-temperature saves
The input gas temperature of coal device 12 is 200 DEG C or so, and exit gas temperature is 80 DEG C -90 DEG C.Air side works as boiler combustion colm,
A cold air channel 8 and First air steam air heater 15, Secondary Air steam air heater 16 on cold secondary air duct 9 put into operation, air inlet preheater
Cold first and second air temperature of rotary regenerative air preheater middle-temperature section 4 is 40-50 DEG C, air preheater outlet heat primary air road 5,
The hot wind-warm syndrome of secondary air duct 6 is 270-280 DEG C.The system low-voltage low-level (stack-gas) economizer 12 is arranged in rotary regenerative air preheater 3,4 and
Between deduster 11, the input gas temperature of deduster 11 can be reduced, the operational efficiency of deduster 11 is improved, is advantageous to guarantee and removes
Dirt device 11 it is safe for operation, the power consumption of air-introduced machine 13 can also be reduced.But contain in the flue gas due to entering low-pressure low-temperature economizer 12
There is larger amount of flying dust, so need to prevent the high temperature section of low-pressure low-temperature economizer 12 from the clogging caused by dust stratification occur.Should
System high temperature section is mainly double by optimization design heated face structure (flue gas flow rate between optimum option tube pitch and pipe), and configuration
Medium high-energy jet soot blower solves the problems, such as dust stratification.The system is suitable to the transformation of active service boiler, and boiler change is smaller, only needs
Increase the easy construction of low-pressure low-temperature economizer 12.
Embodiment 4
The method for preventing ammonium hydrogen sulfate from blocking air preheater after the transformation of the present embodiment SCR denitration, suitable for embodiment 3
The system that ammonium hydrogen sulfate blocks air preheater is prevented after described SCR denitration transformation, methods described includes：Coal-burning boiler exports
Flue gas successively by SCR denitration device, air preheater, low-pressure low-temperature economizer, deduster, air-introduced machine, chimney.Other works
Make that method is same as Example 2, the difference is that only the position that have changed deduster and low-temp low-pressure economizer.
Traditional air preheater is mostly 3 sections, and respectively high, medium and low temperature section, ABS is typically in air preheater
The temperature range viscosity of low-temperature zone junction and low-temperature zone is very strong, easily bonds flying dust and blocks air preheater.In this patent
Air preheater cancels cold section of conventional air preheater, heat exchange element is changed into 2 sections, so that air preheater fume side
Outlet temperature is promoted to 205 DEG C or so.
Described above is only the preferred embodiment of the present invention, is not intended to limit 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 some improvement and
Modification, these improvement and modification also should be regarded as protection scope of the present invention.
Claims (6)
1. the system that ammonium hydrogen sulfate blocks air preheater is prevented after a kind of SCR denitration transformation, it is characterised in that including：Along cigarette
Coal-burning boiler that air-flow is set gradually through direction, SCR denitration device, air preheater, deduster, low-pressure low-temperature economizer, draw
Blower fan, chimney, wherein the air preheater includes air preheater high temperature section, the air preheater middle-temperature section being sequentially communicated,
The outlet flue of the SCR denitration device connects air preheater high temperature section import, the sky by air preheater import flue
Air preheater high temperature section air outlet is also communicated with heat primary air road and hot secondary air duct, the smoke of the air preheater middle-temperature section
Mouth connects deduster smoke inlet by air preheater exhaust pass, and the air preheater middle-temperature section air inlet is also communicated with cold
Air channel and cold secondary air duct, First air steam air heater are separately installed with a cold air channel and cold secondary air duct, Secondary Air warms up
Wind device；The flue-gas temperature of the exhaust pass of air preheater middle-temperature section is not less than 200 DEG C.
2. the system that ammonium hydrogen sulfate blocks air preheater, its feature are prevented after SCR denitration transformation according to claim 1
It is, described low-pressure low-temperature economizer and deduster reversing of position flue gas first pass through low-pressure low-temperature economizer, then by dedusting
Device exports, and the outlet flue of the air preheater middle-temperature section connects low-pressure low-temperature economizer by air preheater exhaust pass and entered
Mouth.
3. preventing the system that ammonium hydrogen sulfate blocks air preheater after the SCR denitration transformation according to power requires 1 or 2, it is special
Sign is that the low-pressure low-temperature economizer includes ABS and condenses section and acid-proof dew section, the exit gas temperature control of the acid-proof dew section
System is at 80-90 DEG C.
4. the system that ammonium hydrogen sulfate blocks air preheater, its feature are prevented after SCR denitration transformation according to claim 3
It is, the ABS of the low-pressure low-temperature economizer condenses section and uses steel-tube construction, and the material that ABS condenses section uses the low conjunction of high intensity
Jin Kaodeng steel, surface plate enamel or use fin provided with silicon making coatings, the acid-proof dew section of the low-pressure low-temperature economizer
Tubular construction.
5. the system that ammonium hydrogen sulfate blocks air preheater is prevented after SCR denitration transformation according to claim 1 or 2, its
It is characterised by, the water side connection steamer pusher side heat regenerative system low-pressure heater of the low-pressure low-temperature economizer, low-pressure low-temperature saves coal
Device inlet water temperature is controlled 5 DEG C -10 DEG C on flue gas acid dew point temperature, and the inlet channel of the low-pressure low-temperature economizer is provided with
Water pump.
6. the method that ammonium hydrogen sulfate blocks air preheater is prevented after a kind of SCR denitration transformation, it is characterised in that suitable for right
It is required that the SCR denitration described in 1 or 2 prevents the system that ammonium hydrogen sulfate blocks air preheater after transforming, methods described includes：It is coal-fired
The flue gas of boiler output is successively by SCR denitration device, air preheater, deduster, low-pressure low-temperature economizer, air-introduced machine, cigarette
Chimney；Or coal-burning boiler output flue gas successively by SCR denitration device, air preheater, low-pressure low-temperature economizer, deduster,
Air-introduced machine, chimney；
When a cold air channel steam air heater does not put into operation, heat primary air says one's intention as revealed in what one says temperature and reaches 230 DEG C -240 DEG C, in boiler combustion coal
Moisture when being less than predetermined threshold, a cold air channel steam air heater does not put into operation, and heat primary air does not have to mix cold wind；In boiler combustion
When the moisture of coal is greater than or equal to predetermined threshold, the steam air heater installed on a cold air channel is opened, improves a cold air channel
Import wind-warm syndrome, one's intention as revealed in what one says temperature is said so as to improve heat primary air；
When cold secondary air duct warm-air drier does not put into operation, hot secondary air duct outlet wind-warm syndrome reaches 240 DEG C；Unlatching is arranged on cold Secondary Air
Steam air heater on road, by improving cold secondary air duct import wind-warm syndrome, improve hot secondary air duct outlet wind-warm syndrome；
In running, for control low-pressure low-temperature economizer inlet water temperature 5 DEG C -10 DEG C on flue gas acid dew point temperature, low pressure is low
Warm economizer exit flue-gas temperature control is at 80-90 DEG C.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305413A (en) * | 2011-07-28 | 2012-01-04 | 中国电力工程顾问集团西南电力设计院 | Exhaust gas waste heat recovery and emission reduction comprehensive application system for coal-fired boiler in thermal power plant |
| CN104033921A (en) * | 2014-06-20 | 2014-09-10 | 国家电网公司 | Device and method for preventing ammonium bisulfate from blocking air preheaters of coal-fired boiler |
| CN204739615U (en) * | 2015-06-29 | 2015-11-04 | 南京博沃科技发展有限公司 | Regenerative air preheater prevents stifled ash sealing system in coordination |
| CN106678771A (en) * | 2016-08-05 | 2017-05-17 | 杭州华电能源工程有限公司 | Air heater and low-low temperature economizer coupled energy-saving and environmental-friendly integrated system and method based on fluoroplastic heat exchanger |
| CN106765015A (en) * | 2016-12-22 | 2017-05-31 | 江联重工集团股份有限公司 | One kind prevents the biomass fluid bed boiler of low-temperature corrosion of air preheater and system |
| CN206207454U (en) * | 2016-11-22 | 2017-05-31 | 上海交通大学 | A kind of mechanism for wind-warm syndrome of raising boiler milling system |
| CN207268458U (en) * | 2017-08-01 | 2018-04-24 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | The system for preventing ammonium hydrogen sulfate from blocking air preheater after SCR denitration transformation |
-
2017
- 2017-08-01 CN CN201710644456.5A patent/CN107642793A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305413A (en) * | 2011-07-28 | 2012-01-04 | 中国电力工程顾问集团西南电力设计院 | Exhaust gas waste heat recovery and emission reduction comprehensive application system for coal-fired boiler in thermal power plant |
| CN104033921A (en) * | 2014-06-20 | 2014-09-10 | 国家电网公司 | Device and method for preventing ammonium bisulfate from blocking air preheaters of coal-fired boiler |
| CN204739615U (en) * | 2015-06-29 | 2015-11-04 | 南京博沃科技发展有限公司 | Regenerative air preheater prevents stifled ash sealing system in coordination |
| CN106678771A (en) * | 2016-08-05 | 2017-05-17 | 杭州华电能源工程有限公司 | Air heater and low-low temperature economizer coupled energy-saving and environmental-friendly integrated system and method based on fluoroplastic heat exchanger |
| CN206207454U (en) * | 2016-11-22 | 2017-05-31 | 上海交通大学 | A kind of mechanism for wind-warm syndrome of raising boiler milling system |
| CN106765015A (en) * | 2016-12-22 | 2017-05-31 | 江联重工集团股份有限公司 | One kind prevents the biomass fluid bed boiler of low-temperature corrosion of air preheater and system |
| CN207268458U (en) * | 2017-08-01 | 2018-04-24 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | The system for preventing ammonium hydrogen sulfate from blocking air preheater after SCR denitration transformation |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108525489B (en) * | 2018-04-10 | 2020-03-17 | 西安交通大学 | Coal-fired power plant flue ammonium bisulfate cleaning device based on eddy heating and gas suction method |
| CN108525489A (en) * | 2018-04-10 | 2018-09-14 | 西安交通大学 | Coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant based on eddy heating for heating Yu aspiration method |
| CN108413439A (en) * | 2018-04-23 | 2018-08-17 | 华北电力科学研究院有限责任公司 | Adjust the device and method of four points of storehouse air preheater exit gas temperatures |
| CN108413439B (en) * | 2018-04-23 | 2023-06-20 | 华北电力科学研究院有限责任公司 | Device and method for adjusting temperature of flue gas at outlet of air preheater with four bins |
| CN108679595A (en) * | 2018-06-13 | 2018-10-19 | 华润电力（温州）有限公司 | A kind of power plant boiler and its air preheater anti-block system |
| CN108679595B (en) * | 2018-06-13 | 2024-02-27 | 华润电力（温州）有限公司 | Boiler of thermal power plant and air heater anti-blocking system thereof |
| CN109163351A (en) * | 2018-10-17 | 2019-01-08 | 中国电力工程顾问集团华北电力设计院有限公司 | Solve the air preheater composite structure of blocking etching problem |
| CN109821409A (en) * | 2019-03-13 | 2019-05-31 | 西安交通大学 | After cooperation-removal SCR in flue gas sulfur trioxide ammonia and flying dust system and method |
| CN112097287A (en) * | 2019-06-17 | 2020-12-18 | 王键 | Boiler energy-saving and flue gas whitening system, process and application |
| CN112097287B (en) * | 2019-06-17 | 2022-09-30 | 重庆鑫顺盛达科技有限公司 | Boiler energy-saving and flue gas whitening system, process and application |
| 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 |
| CN110848729A (en) * | 2019-10-18 | 2020-02-28 | 华电电力科学研究院有限公司 | Rotary air preheater blockage prevention and control system and working method thereof |
| CN110793057A (en) * | 2019-10-18 | 2020-02-14 | 华电电力科学研究院有限公司 | System and method for preventing air preheater of coal-fired power plant from being blocked |
| CN110793057B (en) * | 2019-10-18 | 2024-01-30 | 华电电力科学研究院有限公司 | System and method for preventing blockage of air preheater of coal-fired power plant |
| WO2021109448A1 (en) * | 2019-12-02 | 2021-06-10 | 南京凯盛国际工程有限公司 | Self-resolving scr denitration system |
| CN111981501A (en) * | 2020-07-30 | 2020-11-24 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Anti-blocking heat exchange device of air preheater of pulverized coal boiler |
| CN113877731A (en) * | 2021-09-22 | 2022-01-04 | 安徽金轩科技有限公司 | Method for preventing low-temperature section from blocking and scaling of air preheater of circulating fluidized bed boiler |
| CN114857961A (en) * | 2022-04-25 | 2022-08-05 | 内蒙古大板发电有限责任公司 | Power plant boiler system capable of preventing air preheater from being blocked |
| CN114857961B (en) * | 2022-04-25 | 2024-03-01 | 内蒙古大板发电有限责任公司 | Power plant boiler system for preventing air preheater from being blocked |
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Effective date of registration: 20180402 Address after: 100000, No. 1, courtyard 6, Shijingshan District, Beijing, Shijingshan District, 1201. 1201 Applicant after: China Datang Research Institute of science and Technology Co., Ltd. Thermal Power Generation Technology Research Institute Address before: 100043, No. 1, courtyard 6, Shijingshan District, Beijing, Shijingshan District, 1515. 1515 Applicant before: China Datang Group Science and Technology Research Institute Limited company North China branch |