CN110145754A - It can prevent the boiler flue gas treatment system and method for back-end surfaces low-temperature corrosion - Google Patents
It can prevent the boiler flue gas treatment system and method for back-end surfaces low-temperature corrosion Download PDFInfo
- Publication number
- CN110145754A CN110145754A CN201910514485.9A CN201910514485A CN110145754A CN 110145754 A CN110145754 A CN 110145754A CN 201910514485 A CN201910514485 A CN 201910514485A CN 110145754 A CN110145754 A CN 110145754A
- Authority
- CN
- China
- Prior art keywords
- temperature
- organic media
- organic
- boiler
- economizer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003546 flue gas Substances 0.000 title claims abstract description 34
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 230000007797 corrosion Effects 0.000 title claims abstract description 30
- 238000005260 corrosion Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 21
- 238000010531 catalytic reduction reaction Methods 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 6
- 238000010248 power generation Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000002309 gasification Methods 0.000 claims description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims 3
- 239000003054 catalyst Substances 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 239000003517 fume Substances 0.000 abstract description 3
- 239000002028 Biomass Substances 0.000 description 6
- 239000002956 ash Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000013517 stratification Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 240000005373 Panax quinquefolius Species 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 244000082204 Phyllostachys viridis Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/02—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass involving the use of working media other than water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/36—Water and air preheating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
-
- 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
-
- 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
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
-
- 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
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2219/00—Treatment devices
- F23J2219/10—Catalytic reduction devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Water Supply & Treatment (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses boiler flue gas treatment systems and method that one kind can prevent back-end surfaces low-temperature corrosion, it mainly solves boiler air preheater in the prior art and is easy to happen the technical issues of fume side low-temperature corrosion, stifled ash and denitrating catalyst fail, it is equipped with high-temperature economizer, low-level (stack-gas) economizer, high-temperature air preheater, organic media evaporator inside processing system flue of the present invention, high-temperature metal sack cleaner, selective catalytic reduction denitration device are set outside flue；High-temperature economizer is sequentially connected high-temperature metal sack cleaner, selective catalytic reduction denitration device, low-level (stack-gas) economizer, high-temperature air preheater, organic media evaporator, high-temperature air preheater is connect with organic media condenser, organic media evaporator is connect with organic Rankine generating set working medium input terminal, and organic Rankine generating set is connected with organic media condenser；Organic media condenser is connected with changeable flow working medium pump, and changeable flow working medium pump is connect with organic media evaporator.
Description
Technical field
It is generated electricity the present invention relates to waste heat in a kind of effective use boiler of power plant flue gas and can be avoided the sky of boiler
The system and method for low-temperature corrosion occurs for air preheater, in particular to a kind of boiler smoke that can prevent back-end surfaces low-temperature corrosion
Gas processing system and method, applied to using in the boiler of biomass power generation.Wherein biomass is agricultural crop straw and shell skin, woods
Industry three remains object, secondary small fuel wood, bamboo class residue, sludge, house refuse.
Background technique
Currently, power plant is in the big fuel of biomass burning, rubbish and burning mixed mud these moisture contents, generated flue gas
Water content is also larger, and when boiler tail encounters the lower heated medium of temperature, the steam in flue gas is easier in low temperature tube wall
On condense into dew, prolonged condensation to generate dust stratification and corrosion on the heating surface tube wall of flue tail.Flue gas in order to prevent
Flue-gas temperature must be promoted to prevent by generating condensation dust stratification blocking exhaust gases passes or corrosion air flue equipment heating surface piping, the prior art
Flue gas forms condensation in flue tail and corrodes flue tail equipment heating surface, then this mode will make flue tail exhaust gas temperature mistake
Height, it is very unfavorable to run to economy of power plant.Generally existing heated surface at the end of boiler repair and maintenance in biomass power generation industry at present
The case where costly or exhaust gas temperature high influence generating efficiency.
Therefore the characteristics of research heated surface at the end of boiler low-temperature corrosion, new type heat exchanger is developed, boiler safety, economy are met
Service requirement, economy of power plant, safe operation have great significance to economic development and environmental protection.
Summary of the invention
Air preheater is arranged in flue in the prior art, is exchanged heat using flue gas and cold air, air preheater
The heating surface of fume side is easy to happen low-temperature corrosion or dust stratification blockage problem, if air preheater occurs low-temperature corrosion and blocks up
Ash can then cause heat transfer deterioration, reduce boiler efficiency, increase repair and maintenance expense, change even with water supply as intermediary
Heat, effect are still undesirable.When using SCR denitration technology, it is easy to happen catalyst blockage, failure phenomenon.
In order to overcome in the prior art boiler air preheater heating surface be easy to happen fume side low-temperature corrosion, stifled ash, de-
Denox catalyst failure, thus waste heat in a kind of effective use boiler of power plant flue gas is provided and is generated electricity and can be avoided boiler
The system and method for low-temperature corrosion occurs for air preheater, improves air preheater service life, reduces boiler maintenance maintenance expense
With, extend denitrating catalyst service life, improve boiler efficiency of heating- utilization.
The purpose of the present invention can be achieved through the following technical solutions: a kind of pot preventing back-end surfaces low-temperature corrosion
Kiln gas processing system, including flue, flue is interior to be equipped with high-temperature economizer and low-level (stack-gas) economizer, characterized in that in the flue
High-temperature air preheater, organic media evaporator are inside also set up, high-temperature metal sack cleaner, choosing are set outside the flue
Selecting property catalytic reduction denitration device；High-temperature economizer is sequentially connected high-temperature metal sack cleaner, selective catalysis by pipeline
Denitrification apparatus, low-level (stack-gas) economizer, high-temperature air preheater, organic media evaporator are restored, high-temperature air preheater passes through pipeline
Connect with the organic media condenser being arranged in air distribution air duct, organic media evaporator by organic media pipeline with it is organic bright
Agree the connection of generating set working medium input terminal, organic Rankine generating set working medium output end passes through organic media pipeline and organic media
Condenser is connected；Organic media condenser working medium output end is connected by organic media pipeline with changeable flow working medium pump,
Changeable flow working medium pump is connect by organic media pipeline with organic media evaporator, and the organic media pipeline has equipped with valve
Door.
It is the tube bank that extended surface tube or light pipe form inside high-temperature air preheater.
It is the tube bank that extended surface tube or light pipe form inside organic media condenser (low-temperature air preheater).
It is the tube bank that extended surface tube or light pipe form inside organic media evaporator.
Buffler is being equipped in flue between high-temperature economizer and low-level (stack-gas) economizer.
A kind of boiler smoke processing method preventing back-end surfaces low-temperature corrosion, comprising the following steps: save high temperature
350~400 DEG C of flue gases are guided to high-temperature metal sack cleaner outside furnace from boiler back end ductwork and are dusted after coal device, dust concentration
The flue gas of 3~10mg/L enters selective catalytic reduction denitration device, and the flue gas of 10~30mg/L of nitrous oxides concentration returns to pot
Furnace back-end ductwork, by low-level (stack-gas) economizer, high-temperature air preheater, organic media evaporator, flue-gas temperature is reduced to 90~130
DEG C discharge boiler；Air distribution air duct is added, the cold air of room temperature first passes through organic media condenser and is heated in air duct, enters back into height
Warm air preheater, temperature leave high-temperature air preheater and participate in boiler combustion after being increased to 180~230 DEG C；Under a kind of normal pressure
The liquid organic medium that 0~100 DEG C of gasification temperature is pumped to organic media evaporator by changeable flow working medium pump, in organic Jie
By flue gas at organic Rankine generating set is entered after gaseous state in matter evaporator, power generation of doing work in organic Rankine generating set
After be discharged into organic media condenser, in organic media condenser by room temperature cold air it is cooling after condensed into liquid enter it is next
Circulation.
Beneficial effects of the present invention: since flue gas has already passed through dust collecting process before entering high-temperature air preheater, because
There is no stifled grey problems for this high-temperature air preheater.Organic media condenser is arranged in air duct, and air preheat uses organic work
Matter is as heat medium, and there is no low-temperature corrosions and stifled grey problem.Flue gas into organic media evaporator has already passed through dedusting,
Smoke temperature drop is controlled by controlling the working medium amount into organic media evaporator, therefore there is no stifled ashes for organic media evaporator
With low-temperature corrosion problem.In order to improve boiler efficiency, boiler must reduce heat loss due to exhaust gas, as far as possible reduction exhaust gas temperature, because
It needs to arrange most enough heating surfaces in this flue.It is pre- in addition to being disposed with superheater, economizer, air in boiler flue of the present invention
Hot device is with to there also is provided organic media evaporator；This kind of evaporator absorbs heat by heat-absorbing medium phase transformation, it is possible to reduce passes
Heat area improves heat exchange efficiency；And evaporation can be controlled by controlling the internal circulating load into organic media in the evaporator
Device tube wall temperature prevents evaporator outside wall surface temperature lower than flue gas dew point, prevents low-temperature corrosion.The present invention has following two
A feature: 1, can prevent Air Preheater Heating Surface from low-temperature corrosion and stifled ash occurs, and avoid occurring due to air preheater low
Temperature corrosion and stifled ash cause boiler load or efficiency to reduce.2, can reduce air preheater operation and repair and maintenance amount and at
This, can be improved boiler efficiency, the effect for saving station service.
Detailed description of the invention
Fig. 1 is present system structure flow chart.
In Fig. 1: 1- high-temperature economizer, 2- high-temperature metal sack cleaner, 3- selective catalytic reduction denitration device, 4- are low
Warm economizer, 5- high-temperature air preheater, 6- organic media condenser, 7- changeable flow working medium pump, 8- organic Rankine generator
Group, 9- organic media evaporator, 10- buffler, 11- flue, the air duct 12-.
Specific embodiment
Referring to Fig.1, a kind of boiler flue gas treatment system preventing back-end surfaces low-temperature corrosion, including flue 11, flue
The Jinan high-temperature economizer 1(Jie Sheng boiler plant Co., Ltd is equipped in 11) and low-level (stack-gas) economizer 4(Jinan victory Sheng boiler plant have
Limit company), the Jinan high-temperature air preheater 5(Jie Sheng boiler plant Co., Ltd is also set up in the flue 11), You Jijie
Matter evaporator 9(Yangtze River in China power Group Co., Ltd), high-temperature metal sack cleaner 2 is set outside the flue 11
(Fujian Yuan Zhi environmental protection equipment Co., Ltd), the Fujian selective catalytic reduction denitration device 3(Yuan Zhi environmental protection equipment Co., Ltd)；
High-temperature economizer 1 is sequentially connected high-temperature metal sack cleaner 2, selective catalytic reduction denitration device 3, low temperature by pipeline and saves
Coal device 4, high-temperature air preheater 5, organic media evaporator 9, high-temperature air preheater 5 is by pipeline and is arranged in air distribution air duct
Organic media condenser 6(Yangtze River in China power Group Co., Ltd in 12) it connects, organic media evaporator 9 passes through organic Jie
Matter pipeline is connect with 8 working medium input terminal of organic Rankine generating set, and 8 working medium output end of organic Rankine generating set passes through organic Jie
Matter pipeline is connected with organic media condenser 6；6 working medium output end of organic media condenser is by organic media pipeline and can be changed
Flow working medium pump 7 is connected, and changeable flow working medium pump 7 is connect by organic media pipeline with organic media evaporator 9, described to have
Machine medium pipeline has equipped with valve.A kind of boiler smoke processing method preventing back-end surfaces low-temperature corrosion, by high temperature
Economizer (1) afterwards guide to high-temperature metal sack cleaner 2 outside furnace from boiler back end ductwork 11 and be dusted by 350~400 DEG C of flue gases,
The flue gas of 3~10mg/L of dust concentration enters selective catalytic reduction denitration device 3, the cigarette of 10~30mg/L of nitrous oxides concentration
Gas returns to boiler back end ductwork 11, by low-level (stack-gas) economizer 4, high-temperature air preheater 5, organic media evaporator 9, flue-gas temperature
It is reduced to 90~130 DEG C of discharge boilers；The cold air of room temperature first passes through organic media condenser in air duct 12 and Cryogenic air is pre-
Hot device 6 is heated, and enters back into high-temperature air preheater 5, and temperature leaves the ginseng of high-temperature air preheater 5 after being increased to 180 DEG C or more
With boiler combustion；0~100 DEG C of gasification temperature of liquid organic medium (such as pentafluoropropane) passes through changeable flow under a kind of normal pressure
Working medium pump 7 is pumped to organic media evaporator 9, in organic media evaporator 9 by flue gas at gaseous state after enter it is organic bright
Agree generating set 8, be discharged into organic media condenser 6 after acting power generation in organic Rankine generating set 8, is condensed in organic media
Liquid is condensed into next circulation after the cooling of room temperature cold air in device 6.
The present invention, which can be used for the heated surface at the end of boiler equipment such as power plant's biomass, rubbish, burning mixed mud, prevents low-temperature corrosion protection,
Wherein biomass is that agricultural crop straw and shell skin, forestry three remain object, secondary small fuel wood, bamboo class residue, sludge, house refuse.
The above case study on implementation is the boiler smoke that claimed one kind can prevent back-end surfaces low-temperature corrosion
The preferred embodiment of processing system and method.Those skilled in the art further can be improved and be changed on this basis
Become, but under the premise of not departing from essence of the invention, both falls within protection scope of the present invention.
Claims (10)
1. one kind can prevent the boiler flue gas treatment system of back-end surfaces low-temperature corrosion, including flue, high temperature is equipped in flue
Economizer and low-level (stack-gas) economizer, characterized in that high-temperature air preheater, organic media evaporator are also set up in the flue,
High-temperature metal sack cleaner, selective catalytic reduction denitration device are set outside the flue；High-temperature economizer passes through pipe
Road is sequentially connected high-temperature metal sack cleaner, selective catalytic reduction denitration device, low-level (stack-gas) economizer, high temperature air preheating
Device, organic media evaporator, high-temperature air preheater are connected by pipeline with the organic media condenser being arranged in air distribution air duct
It connects, organic media evaporator is connect by organic media pipeline with organic Rankine generating set working medium input terminal, organic Rankine hair
Motor group working medium output end is connected by organic media pipeline with organic media condenser；The output of organic media condenser working medium
End be connected by organic media pipeline with changeable flow working medium pump, changeable flow working medium pump pass through organic media pipeline with it is organic
The connection of medium evaporator, the organic media pipeline have equipped with valve.
2. the boiler flue gas treatment system according to claim 1 for preventing back-end surfaces low-temperature corrosion, it is characterized in that:
Its internal tube bank formed for extended surface tube or light pipe of the high-temperature air preheater.
3. the boiler flue gas treatment system according to claim 1 for preventing back-end surfaces low-temperature corrosion, it is characterized in that:
Its internal tube bank formed for extended surface tube or light pipe of the organic media condenser.
4. the boiler flue gas treatment system according to claim 1 for preventing back-end surfaces low-temperature corrosion, it is characterized in that:
Its internal tube bank formed for extended surface tube or light pipe of the organic media evaporator.
5. the boiler flue gas treatment system according to claim 1 for preventing back-end surfaces low-temperature corrosion, it is characterized in that:
Buffler is equipped in the flue between high-temperature economizer and low-level (stack-gas) economizer.
6. the processing method of the boiler flue gas treatment system of back-end surfaces low-temperature corrosion can be prevented described in a kind of claim 1,
It is characterized in that: the following steps are included:
(1) by 350~400 DEG C of flue gases after high-temperature economizer from boiler back end ductwork guide to outside furnace high-temperature metal sack cleaner into
Row dedusting, flue gas enters selective catalytic reduction denitration device after dedusting, and the flue gas after chosen property is catalytic-reduction denitrified returns to
Boiler back end ductwork, by low-level (stack-gas) economizer, high-temperature air preheater, organic media evaporator, boiler is discharged in flue gas；
(2) air distribution air duct is added, the cold air of room temperature first passes through organic media condenser and is heated in air duct, enters back into high temperature sky
Air preheater leaves high-temperature air preheater and participates in boiler combustion after heating；Liquid organic medium passes through changeable flow working medium pump
Be pumped to organic media evaporator, in organic media evaporator by flue gas at gaseous state after enter organic Rankine generator
Group is discharged into organic media condenser after acting power generation in organic Rankine generating set, by room temperature in organic media condenser
Liquid is condensed into after cold air is cooling into next circulation.
7. processing method according to claim 6, it is characterized in that: 3~10mg/Nm of exhaust gas dust concentration after control dedusting3。
8. processing method according to claim 6, it is characterized in that: nitrogen oxides is dense after control selections are catalytic-reduction denitrified
Spend 10~30mg/ Nm3。
9. processing method according to claim 6, it is characterized in that: control discharge boiler smoke temperature is at 90~130 DEG C.
10. processing method according to claim 6, it is characterized in that: high-temperature air preheater cold air is heated to 180~
230 DEG C export, 0~100 DEG C of gasification temperature under liquid organic medium normal pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910514485.9A CN110145754A (en) | 2019-06-14 | 2019-06-14 | It can prevent the boiler flue gas treatment system and method for back-end surfaces low-temperature corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910514485.9A CN110145754A (en) | 2019-06-14 | 2019-06-14 | It can prevent the boiler flue gas treatment system and method for back-end surfaces low-temperature corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110145754A true CN110145754A (en) | 2019-08-20 |
Family
ID=67591303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910514485.9A Pending CN110145754A (en) | 2019-06-14 | 2019-06-14 | It can prevent the boiler flue gas treatment system and method for back-end surfaces low-temperature corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110145754A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715449A (en) * | 2019-10-24 | 2020-01-21 | 中国特种设备检测研究院 | Cross arrangement method for flue gas latent heat recovery devices of gas-fired boiler |
| CN111795379A (en) * | 2020-08-07 | 2020-10-20 | 无锡华光环保能源集团股份有限公司 | Circulating fluidized bed boiler for burning biomass |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038137A (en) * | 2007-04-19 | 2007-09-19 | 上海发电设备成套设计研究院 | Automatic control system for wall temperature of boiler discharged smoke heat recovery heat exchanger |
| CN101709879A (en) * | 2009-09-27 | 2010-05-19 | 西安交通大学 | System for deep cooling and waste heat recovery of smoke gas in boiler |
| CN203756253U (en) * | 2013-08-08 | 2014-08-06 | 南京微阳电力科技有限公司 | Low-temperature type organic Rankine cycle waste heat power generation system for steel plant |
| CN104534491A (en) * | 2015-01-04 | 2015-04-22 | 山东大学 | Ultralow-dust rear smoke channel system of boiler |
| CN105526577A (en) * | 2015-12-22 | 2016-04-27 | 东方菱日锅炉有限公司 | Control-stable low-low-temperature coal economizer system |
| CN205965516U (en) * | 2016-07-22 | 2017-02-22 | 浙江千尧环境工程有限公司 | SCR urea pyrolysis system |
| CN107477564A (en) * | 2017-09-26 | 2017-12-15 | 山东琦泉能源科技有限公司 | A kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system and method |
| CN210153844U (en) * | 2019-06-14 | 2020-03-17 | 上海昊熙能源科技有限公司 | Boiler flue gas treatment system capable of preventing low-temperature corrosion of tail heating surface |
-
2019
- 2019-06-14 CN CN201910514485.9A patent/CN110145754A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038137A (en) * | 2007-04-19 | 2007-09-19 | 上海发电设备成套设计研究院 | Automatic control system for wall temperature of boiler discharged smoke heat recovery heat exchanger |
| CN101709879A (en) * | 2009-09-27 | 2010-05-19 | 西安交通大学 | System for deep cooling and waste heat recovery of smoke gas in boiler |
| CN203756253U (en) * | 2013-08-08 | 2014-08-06 | 南京微阳电力科技有限公司 | Low-temperature type organic Rankine cycle waste heat power generation system for steel plant |
| CN104534491A (en) * | 2015-01-04 | 2015-04-22 | 山东大学 | Ultralow-dust rear smoke channel system of boiler |
| CN105526577A (en) * | 2015-12-22 | 2016-04-27 | 东方菱日锅炉有限公司 | Control-stable low-low-temperature coal economizer system |
| CN205965516U (en) * | 2016-07-22 | 2017-02-22 | 浙江千尧环境工程有限公司 | SCR urea pyrolysis system |
| CN107477564A (en) * | 2017-09-26 | 2017-12-15 | 山东琦泉能源科技有限公司 | A kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system and method |
| CN210153844U (en) * | 2019-06-14 | 2020-03-17 | 上海昊熙能源科技有限公司 | Boiler flue gas treatment system capable of preventing low-temperature corrosion of tail heating surface |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715449A (en) * | 2019-10-24 | 2020-01-21 | 中国特种设备检测研究院 | Cross arrangement method for flue gas latent heat recovery devices of gas-fired boiler |
| CN110715449B (en) * | 2019-10-24 | 2021-04-27 | 中国特种设备检测研究院 | Cross arrangement method for flue gas latent heat recovery devices of gas-fired boiler |
| CN111795379A (en) * | 2020-08-07 | 2020-10-20 | 无锡华光环保能源集团股份有限公司 | Circulating fluidized bed boiler for burning biomass |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104266171A (en) | Flue gas waste heat utilization system of thermal power plant | |
| CN100358800C (en) | Electric furnace method yellow phosphorus tail gas residual heat comprehensive balance utilizing system | |
| CN203177151U (en) | Boiler flue gas waste heat recycling system with improved structure | |
| CN204100225U (en) | Coal steam-electric plant smoke bootstrap system | |
| CN109668165A (en) | Hot Secondary Air and smoke waste heat utilization system and thermal power generation unit | |
| CN102384680A (en) | Device for recovering and utilizing waste heat generated by smoke discharging in split type heating medium circulating way | |
| CN203375426U (en) | Boiler tail structure capable of preventing boiler low-temperature air preheater from low-temperature corrosion | |
| CN107366897A (en) | A kind of Pollutant in Coal Burning Boiler emission reduction optimization collaboration fume afterheat deep exploitation system | |
| CN110145754A (en) | It can prevent the boiler flue gas treatment system and method for back-end surfaces low-temperature corrosion | |
| CN204830000U (en) | System for use spiral finned heat exchanger to promote air preheater safety | |
| CN202762308U (en) | Deep energy-saving system based on flue gas desulfurization and denitrification process optimization | |
| CN202484963U (en) | Quality improvement and gradual utilization system of waste heat of boiler smoke of heat-engine plant | |
| CN105020737A (en) | System for improving safety of air pre-heater by utilizing spiral-fin type heat exchanger | |
| CN205592967U (en) | A waste heat power generation system for dangerous waste disposal trade of industry | |
| CN210568552U (en) | Boiler energy-saving and flue gas whitening system | |
| CN203286582U (en) | Boiler air preheating device | |
| CN215112694U (en) | Full-load denitration system of circulating fluidized bed boiler based on biomass fuel | |
| CN203375434U (en) | Device for preventing heating surface on flue gas side at tail of boiler from being corroded at low temperature | |
| CN203375432U (en) | Protective device of low-temperature heating surface at tail of boiler | |
| CN202791953U (en) | Water pipe type condensation superheating steam generator | |
| CN210153844U (en) | Boiler flue gas treatment system capable of preventing low-temperature corrosion of tail heating surface | |
| CN112097287B (en) | Boiler energy-saving and flue gas whitening system, process and application | |
| CN202630747U (en) | Waste heat recovery system capable of improving efficiency of electric dust collector | |
| CN206449678U (en) | A kind of power plant's heat primary air cooling system for possessing emission reduction energy-saving effect | |
| CN106016242B (en) | Face the feedwater of stove progressive solution and flue gas realizes startup stage denitration bringing normally into operation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |