CN206755210U - Fire coal boiler fume purifies and waste heat recovery processing system - Google Patents
Fire coal boiler fume purifies and waste heat recovery processing system Download PDFInfo
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- CN206755210U CN206755210U CN201720380615.0U CN201720380615U CN206755210U CN 206755210 U CN206755210 U CN 206755210U CN 201720380615 U CN201720380615 U CN 201720380615U CN 206755210 U CN206755210 U CN 206755210U
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- flue gas
- residual
- ultrapurification
- heat
- flue
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- 239000003517 fume Substances 0.000 title claims abstract description 41
- 239000002918 waste heat Substances 0.000 title claims abstract description 33
- 239000003245 coal Substances 0.000 title claims abstract description 28
- 238000012545 processing Methods 0.000 title claims abstract description 27
- 238000011084 recovery Methods 0.000 title claims abstract description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 113
- 239000003546 flue gas Substances 0.000 claims abstract description 113
- 239000006096 absorbing agent Substances 0.000 claims abstract description 31
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 24
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 16
- 230000023556 desulfurization Effects 0.000 claims abstract description 15
- 238000000746 purification Methods 0.000 claims abstract description 13
- 230000001473 noxious effect Effects 0.000 claims abstract description 6
- 239000000470 constituent Substances 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 14
- 239000000428 dust Substances 0.000 claims description 13
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 235000019504 cigarettes Nutrition 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 2
- 239000005864 Sulphur Substances 0.000 claims 2
- 239000000779 smoke Substances 0.000 abstract description 8
- 238000001556 precipitation Methods 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000003303 reheating Methods 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 description 13
- 230000007797 corrosion Effects 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 229910052602 gypsum Inorganic materials 0.000 description 6
- 239000010440 gypsum Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000000505 pernicious effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012717 electrostatic precipitator Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 229920002313 fluoropolymer Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 231100001010 corrosive Toxicity 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The utility model discloses a kind of purification of fire coal boiler fume and waste heat recovery processing system, including residual-heat exchanger, flue gas ultrapurification device, cleaning spray system and flue gas ultrapurification cooler, wherein, residual-heat exchanger includes residual heat absorber and residual evaporator, residual heat absorber is arranged in desulfurizing tower smoke inlet pipelines, flue gas ultrapurification device is arranged on desulfurizing tower exhanst gas outlet flue, flue gas after desulfurization process, which enters in the flue gas ultrapurification device, to be condensed, and cleaning spray system is used to carry out cleaning showers to the noxious fume of precipitation；Residual evaporator is arranged on the flue between flue gas ultrapurification and chimney and is connected with residual heat absorber, and waste-heat is carried out for flue gas, its temperature is discharged after raising by chimney.The utility model can effectively extract the waste heat in high-temperature flue gas, the system for carrying out reheating discharge to flue gas using the waste heat of high temperature recovery, reach the purpose of not only synthesis energy saving but also environment protection emission.
Description
Technical field
The utility model is related to fire coal boiler fume process field, and in particular to a kind of purification of fire coal boiler fume and
Waste heat recovery processing system and method.
Background technology
China is coal-fired big country, and consumption of coal accounts for primary energy total amount more than 70%.Discharged while coal burning a large amount of
Air pollutants, according to statistics, coal-fired SO2, NOx, discharge quantity of particulate matter account for the 90% of national total release, 67% and respectively
70%.SO2, NOx are in acidity in these pollutants, are combined with particulate matter and settle to form acid rain, China's acid rain area in 2010
1400000 square kilometres, area 14% is accounted for, serious regional combined pollution occur in some areas.After 11th Five-Year coal-fired
SO2Since the binding indicator as socio-economic development, 12 SO2, NOx will cut down target as the binding indicator
It is defined as 8% and 10%.
In the measure of control Coal-smoke Air Pollution, electrostatic precipitator dedusting, Desulfurization of Wet Limestone-gypsum are commonly used.
Conventional fire coal boiler fume cleaning system includes air preheater, electrostatic precipitator, flue gas heat-exchange unit (GGH) and SO and absorbed
Tower.Flue gas enters air preheater after leaving boiler, and partial fume waste heat is recycled for heating air, gone out from air preheater
The flue-gas temperature come probably in 130-150C, ensures rear end electrostatic precipitator not acid corrosion, flue gas is changed by gas gas after dedusting
Hot device (generally swinging GGH) enters absorption tower desulfurization, and GGH can reclaim former fume afterheat, by neat stress be heated to 80C with
On.
Such as patent document CN 204786486U disclose a kind of fire coal boiler fume processing system, it is connected to fire coal
Between boiler and chimney, the fire coal boiler fume processing system includes air preheater, desulfurizing tower and the heat exchange of gas cleaning waste heat
Device, air preheater connect the flue of boiler tail, and air preheater connects desulfurizing tower, gas cleaning waste heat by discharge flue
Heat exchanger is arranged between desulfurizing tower and chimney.Gas cleaning afterheat heat exchanger is used for fume afterheat and absorbs and condense in flue gas
Moisture, energy high-efficient cleaning remove the dust in flue gas and play desulfidation.Fire coal boiler fume processing system is by residual heat from boiler fume
It is effective to recycle, and moisture in flue gas can be condensed after desulfurizing tower, and condensate can almost take away flue dust whole in flue gas,
Reaching the effect of flue gas ultrapurification and dehumidifying, condensate after treatment can be used for cooling tower spray or desulfurization water,
Serve the effect of energy-conserving and environment-protective.
But in the program, the flue gas of coal-burning boiler is directly entered air preheater and carries out heat exchange, subsequently into desulfurization
Tower is handled, and without processing routines such as denitration, dedustings, desulfuration efficiency can be reduced, and effect is deteriorated, and is on the other hand more attached most importance to
Want, the flue gas after desulfurization process is directly just discharged by chimney, because the close phase of temperature of desulfuration efficiency and flue gas
Close, often can all have to the flue gas for entering desulfurizing tower and be strict with, to cause desulfuration efficiency and energy utilization rate highest, this
The flue gas of desulfurizing and purifying its temperature after kind of mode is handled is often relatively low, still there is volume of smoke, and contains large quantity of moisture, directly
Considerable influence can be produced in air to environment by running in.
Utility model content
For the disadvantages described above or Improvement requirement of prior art, the utility model provides a kind of the net of fire coal boiler fume
Change and waste heat recovery processing system, it is improved by the design and structure of optimization, so as to not only can effectively extract high temperature cigarette
Waste heat in gas, the consumption of desulfurizing tower shower water is reduced, while again to flue gas ultrapurification dewater treatment, more than high temperature recovery
The system that heat carries out reheating discharge to flue gas, reach the purpose of not only synthesis energy saving but also environment protection emission.
To achieve the above object, according to the utility model, there is provided at the purification and waste heat recovery of a kind of fire coal boiler fume
Reason system, it is arranged on the forward and backward flue of coal-burning boiler desulfuration absorbing tower, for realizing the processing to fire coal boiler fume,
Characterized in that,
The purification and waste heat recovery processing system include residual-heat exchanger, flue gas ultrapurification device, cleaning spray system and cigarette
Gas ultrapurification cooler, wherein, the residual-heat exchanger includes residual heat absorber and residual evaporator, and the residual heat absorber is set
In desulfurizing tower smoke inlet pipelines, for carrying out absorbing and cooling temperature to the pending flue gas, the flue gas after cooling be used for into
Enter desulfurizing tower and carry out desulfurization process, the flue gas ultrapurification device is arranged on desulfurizing tower exhanst gas outlet flue, and the flue gas surpasses
Clarifier, which is provided with, cleans spray system and flue gas ultrapurification cooler, and the flue gas after desulfurization process enters the flue gas ultrapurification device
In, condensed by the flue gas ultrapurification cooler, to separate out noxious fume and gas, the cleaning spray system is used for pair
The noxious fume of precipitation carries out cleaning showers；The residual evaporator is arranged on the flue between flue gas ultrapurification and chimney
Above and with the residual heat absorber it is connected, heat transfer to the residual evaporator, waste heat of residual heat absorber heat absorption evaporates
Device is used to carry out waste-heat to the flue gas after the processing of flue gas ultrapurification device using the waste heat transmitted, its temperature is led to after raising
Cross chimney discharge.
The program of the present utility model is arranged on the forward and backward flue of coal-burning boiler desulfuration absorbing tower, is absorbed with leading portion
Heat directly heats the flue gas of back segment without loss, before flue gas is discharged in heating, by super-purifying treatment, reduces in flue gas
" gypsum rain " so that ultrapurifying fumes high temperature enters chimney, reaches flue gas eminence diffusion discharge, dedusting drop haze, while returns again
Receive moisture, prevent the purpose of chimney dewing corrosion.
As further improvement of the utility model, residual heat absorber and residual evaporator one in the residual-heat exchanger
Body is separately formed, and it is formed by multiple heat exchange constituent elements, and runs independently of each other.
As further improvement of the utility model, circulating cooling water pipe is provided with the flue gas ultrapurification cooler
Road, for the condensation process for providing heat exchange medium to realize to flue gas in ultrapurification cooler.
As further improvement of the utility model, the system also includes denitrification apparatus and dust arrester, its cloth successively
Put on the flue between the exhanst gas outlet and residual-heat exchanger of coal-burning boiler, for first entering respectively to pending flue gas
Row denitration and dust removal process.
In general, by the contemplated above technical scheme of the utility model compared with prior art, have with following
Beneficial effect：
A kind of fume afterheat that can be used under recovery adverse circumstances and the system for making full use of the waste heat, fire for absorbing
The waste heat of former flue gas before coal-fired plant's desulfurization, heat the neat stress after desulfurization and reach a high temperature the purpose of ultra-clean discharge.
After residual heat absorber absorbs heat, transmitted by interior media to residual evaporator one end of heat exchange constituent element.
It is further described, the neat stress for the low-temperature saturated steam that former flue gas is formed after desulfuration absorbing tower, enter
Corrosion resistant flue gas ultrapurification cooler, is cooled again, is separated out condensate on flue gas ultrapurification cooler tube surface, is condensed
Water adsorbs pernicious gas and dust remaining in neat stress simultaneously, plays a part of reclaiming moisture and ultrapurification to neat stress.
Cooling pipe surface is using fixed time cleaning spray in flue gas ultrapurification cooler described further, containing " gypsum rain " and
The sewage of dust drains into trench and is uniformly processed with desulfurizing tower shower water.
Flue gas ultrapurification cooler described further is circulated using cooling tower cooling water as cooling medium.
Flue gas described further after ultrapurification enters residual evaporator, and the heat that residual heat absorber absorbs is being evaporated
Heating ultrapurifying fumes, make flue gas reach assigned temperature and are discharged in device.
It is same with the surface of smoke contacts using corrosion-resistant, resistant to elevated temperatures non-metal material surface spraying in residual evaporator
Processing.
In general, by the contemplated above technical scheme of the utility model compared with prior art, have with following
Beneficial effect：
(1) in the utility model, by setting flue gas ultrapurification device on desulfurizer exhanst gas outlet pipeline, flue gas is passed through
Condensation process can further absorb flue dust and pernicious gas in flue gas so that its precipitation attachment of moisture that can condense is cooling down
On device fluoroplastics tube wall, and then absorb " gypsum rain " in neat stress, dust and other pernicious gases so that flue gas can obtain
To super-purifying treatment；
(2) in the utility model, by using exhaust-heat absorption and heater, the heat for making full use of flue gas formerly to absorb
Carry out follow-up flue gas, on the one hand do not need to be further added by additional thermal energy, can save the reduction energy, what is more important can be with
Enable the flue gas of discharge to reach certain temperature, further reduce pollution of the discharge to air and destroy；
(3) residual evaporator of the residual heat absorber of the flue gas in the utility model and neat stress, the two is integrated knot
Structure, system architecture is compact, and space-consuming is few, does not need additionaling power to transmit, and pole is applied to be arranged in the coal-burning boiler of narrow space
Position between fume treatment and chimney；
(4) desulfuration absorbing tower is entered after absorbing the heat of former fume high-temperature, former flue-gas temperature reduces, volume-diminished, just suitable
Together in the chemical reaction environment in desulfurizing tower so that the water spray for cooling in tower is greatly lowered, same desulfurizing tower
Treatment quantity increases, and the multiple effect that desulfuration efficiency improves, had both saved and make use of discarded heat energy, reduces harmful substance
Discharge, reduce the consumption of a large amount of cooling shower waters again；
(5) each heat exchange constituent element independent operating between absorber and evaporator, single constituent element will not to other constituent elements
Generation interacts.Because constituent element quantity is more in system, even if having one group or several groups of failures, the fortune of other constituent elements is nor affected on
OK, it is small to exchange thermal efficiency influence, can be neglected；And each heat exchange constituent element uses composite structure, inside is using gold
Category plays good heat transfer and support frame effect, and appearance is attached using high temperature resistant, corrosion resistant nonmetallic materials bag, plays resistance to strong rotten
Corrosion gas or the effect of liquid corrosion, reach the purpose of lifetime of system length.
(6) fire coal boiler fume UTILIZATION OF VESIDUAL HEAT IN and super-purifying treatment system and method for the present utility model, it is former using high temperature
Low-temperature flue gas of the waste-heat of flue gas through super-purifying treatment, the heat and water vapour being discharged into air were both reduced, had caused not
Necessary waste, desulphurization system efficiency is improved again, protects chimney to alleviate the burn into of acid dew to reduce chimney maintenance cost；
Reduce the content of fume emission noxious pollutant again simultaneously, be really achieved the effect of ultrapurification discharge.
Brief description of the drawings
Fig. 1 is to show according to the fire coal boiler fume purification of the utility model embodiment and the structure of waste heat recovery processing system
It is intended to.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
As long as in addition, technical characteristic involved in each embodiment of the utility model disclosed below each other it
Between do not form conflict can be mutually combined.
Fig. 1 is to show according to the fire coal boiler fume purification of the utility model embodiment and the structure of waste heat recovery processing system
It is intended to.
As shown in figure 1, the fire coal boiler fume purification of the utility model embodiment and UTILIZATION OF VESIDUAL HEAT IN processing system, are arranged at
On the forward and backward flue of coal-burning boiler desulfuration absorbing tower, for realizing the processing to fire coal boiler fume.
As shown in figure 1, fire coal boiler fume purification and UTILIZATION OF VESIDUAL HEAT IN processing system are ultra-clean including residual-heat exchanger, flue gas
Change device, cleaning spray system and flue gas ultrapurification cooler.Residual-heat exchanger includes residual heat absorber and residual evaporator, and this is remaining
Heat absorber is installed additional and is arranged in desulfurizing tower smoke inlet pipelines, for carrying out absorbing and cooling temperature, drop to the pending flue gas
Flue gas after temperature is used to enter desulfurizing tower progress desulfurization process.Residual evaporator is arranged on the cigarette between flue gas ultrapurification and chimney
In feed channel.As shown, it is preferred that residual-heat exchanger is waste heat heat exchange constituent element, it includes colling end and evaporation ends, certainly remaining
Heat exchanger can also be other structures form, such as residual heat absorber therein and residual evaporator independently can separately be set
Put, can also be integrally formed all day.Fire coal boiler fume installs residual heat absorber, flue gas additional before entering desulfuration absorbing tower after electric precipitation
Residual heat absorber is first passed around, carries out cooling processing to former flue gas, the evaporation of the heat transfer of absorption to flue gas heat exchange constituent element
Device one end, for heating the neat stress after ultrapurification.
Preferably, system also includes denitrification apparatus and dust arrester, its be sequentially arranged in the exhanst gas outlet of coal-burning boiler with
On flue between residual-heat exchanger, for first carrying out denitration and dust removal process respectively to pending flue gas.Coal-fired pot
Kiln gas enters the absorber end of heat exchanger after denitration, electric precipitation, and the temperature of flue gas is down into desulfurizing tower reaction temperature by high temperature
Degree, the fume afterheat of absorption are transmitted to evaporator end by the low temperature medium to exchange heat in constituent element, and flue gas enters desulfurizing tower.
Flue gas ultrapurification device is arranged on desulfurizing tower exhanst gas outlet flue, and the flue gas ultrapurification device is provided with cleaning spray
Leaching system and flue gas ultrapurification cooler, the flue gas after desulfurization process enters in the flue gas ultrapurification device, ultra-clean by the flue gas
Change cooler to be condensed.By condensed flue gas, condensation separates out attachment of moisture in cooler tube wall (such as fluorine plastic tube
Wall) on, " gypsum rain ", dust and other pernicious gases in absorption neat stress.
Preferably, ultrapurification cooler is with cleaning spray system, gypsum, the ash being attached to for fixed time cleaning on tube wall
Dirt and the Harmful Residue, the shower water after cleaning, precipitation process is uniformly carried out with the reacted shower water of desulfurizing tower.Spray time
And interval, automatically adjusted according to environmental protection tests data.
Residual evaporator is arranged on the flue between flue gas ultrapurification and chimney and is connected with residual heat absorber, should
For the heat transfer of residual heat absorber heat absorption to the residual evaporator, the low-temperature flue gas after ultrapurification enters residual evaporator, should
Residual evaporator is used to carry out waste-heat to the flue gas after the processing of flue gas ultrapurification device using the waste heat transmitted, makes its temperature
Rise enters smoke stack emission after reaching assigned temperature.
As shown in figure 1, the flue gas of boiler back end ductwork discharge enters after out of stock device, dust arrester by flue
Residual heat absorber, flue gas cool in residual heat absorber, then cool again into desulfuration absorbing tower desulfurization, then enter back into ultra-clean
Change cooler further to cool condensation, separate out condensate, the tow taste heat of releasing is taken away into power plant's cooling by cooling water
Tower unifies circulating cooling, and flue gas heats flue gas to required temperature after condensate cleans, into residual evaporator, passes through
" chimney " is emitted into air.For fire coal boiler fume after dedusting, these contain a large amount of SO2、SO3With the corrosion of part dust
Property high-temperature flue gas, initially enters the residual heat absorber of system, flue-gas temperature is down to and is suitable for desulfurizing tower optimal reaction temperature, this
When flue gas temperature be less than acid dew point, flue gas absorbs the SO in flue gas in absorber heat exchanging constituent element surface sweating2、SO3、NOX
The product harmful to air with HF etc., the severe corrosives such as sulfuric acid, sulfurous acid, nitric acid and hydrofluoric acid acid dew is formed, is attached to heat exchange
Constituent element surface.Because constituent element surface bag adheres to one layer of not only high temperature resistant but also corrosion resistant fluoroplastics material so that this layer of acid dew will not
The metal tube of corrosion heat exchange constituent element.Because whole residual heat absorber is worked under this sour environment throughout the year, absorber with
The surface of smoke contacts is also to use corrosion-resistant, resistant to elevated temperatures nonmetallic surface spray treatment so that is formed after flue gas cool-down
Acid dew heat exchanging system casing will not also produce corrosion.
Because flue gas have passed through further dehydration condensation, dedusting and improve temperature discharge, flue gas is not only reduced to cigarette
The corrosion of chimney, has saved substantial amounts of water, more effectively protects the living environment on power plant periphery.Conscientiously realize and not only saved but also ring
The double benefit of guarantor.
Certainly, described above is only preferred embodiment of the present utility model, and the utility model is not limited to enumerate above-mentioned
Embodiment, it should be noted that for any those skilled in the art under the guidance of this specification, that is made is all etc.
With replacement, obvious variant, all fall within the essential scope of this specification, ought to be by protection of the present utility model.
Claims (4)
1. purification and the waste heat recovery processing system of a kind of fire coal boiler fume, its be arranged at coal-burning boiler desulfuration absorbing tower before,
On flue afterwards, for realizing the processing to fire coal boiler fume, it is characterised in that
The purification and waste heat recovery processing system include residual-heat exchanger, flue gas ultrapurification device, cleaning spray system and flue gas and surpassed
Cooler is purified, wherein, the residual-heat exchanger includes residual heat absorber and residual evaporator, and the residual heat absorber is arranged on de-
On sulphur tower flue gas inlet duct, for carrying out absorbing and cooling temperature to the pending flue gas, the flue gas after cooling, which is used to enter, to be taken off
Sulphur tower carries out desulfurization process, and the flue gas ultrapurification device is arranged on desulfurizing tower exhanst gas outlet flue, the flue gas ultrapurification
Device, which is provided with, cleans spray system and flue gas ultrapurification cooler, and the flue gas after desulfurization process enters in the flue gas ultrapurification device,
Condensed by the flue gas ultrapurification cooler, to separate out noxious fume and gas, the cleaning spray system is used for analysis
The noxious fume gone out carries out cleaning showers；The residual evaporator is arranged on the flue between flue gas ultrapurification and chimney
And it is connected with the residual heat absorber, the heat transfer that the residual heat absorber absorbs heat to the residual evaporator, the residual evaporator
For carrying out waste-heat to the flue gas after the processing of flue gas ultrapurification device using the waste heat transmitted, its temperature is set to pass through after raising
Chimney is discharged.
2. purification and the waste heat recovery processing system of a kind of fire coal boiler fume according to claim 1, wherein, it is described remaining
Residual heat absorber and residual evaporator in heat exchanger is integral or separately formed, and it is formed by multiple heat exchange constituent elements,
And run independently of each other.
3. purification and the waste heat recovery processing system of a kind of fire coal boiler fume according to claim 1, wherein, the cigarette
Recirculated cooling water pipeline is provided with gas ultrapurification cooler, it is cold in ultrapurification to flue gas to realize for providing heat exchange medium
But the condensation process in device.
4. purification and the waste heat recovery processing system of a kind of fire coal boiler fume according to any one of claim 1 to 3,
Wherein, the system also includes denitrification apparatus and dust arrester, and it is sequentially arranged in the exhanst gas outlet of coal-burning boiler and handed over waste heat
On flue between parallel operation, for first carrying out denitration and dust removal process respectively to pending flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720380615.0U CN206755210U (en) | 2017-04-12 | 2017-04-12 | Fire coal boiler fume purifies and waste heat recovery processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720380615.0U CN206755210U (en) | 2017-04-12 | 2017-04-12 | Fire coal boiler fume purifies and waste heat recovery processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206755210U true CN206755210U (en) | 2017-12-15 |
Family
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940025A (en) * | 2017-04-12 | 2017-07-11 | 烟台盛海源节能科技有限公司 | Fire coal boiler fume is purified and waste heat recovery processing system and method |
| CN110108033A (en) * | 2019-03-12 | 2019-08-09 | 北京北燃供热有限公司 | It is a kind of for heating medium-sized gas fired-boiler flue gas waste heat recovery apparatus |
| CN112371339A (en) * | 2020-11-09 | 2021-02-19 | 山东岱荣节能环保科技有限公司 | Treatment system for recycling flue gas waste heat |
-
2017
- 2017-04-12 CN CN201720380615.0U patent/CN206755210U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940025A (en) * | 2017-04-12 | 2017-07-11 | 烟台盛海源节能科技有限公司 | Fire coal boiler fume is purified and waste heat recovery processing system and method |
| CN110108033A (en) * | 2019-03-12 | 2019-08-09 | 北京北燃供热有限公司 | It is a kind of for heating medium-sized gas fired-boiler flue gas waste heat recovery apparatus |
| CN112371339A (en) * | 2020-11-09 | 2021-02-19 | 山东岱荣节能环保科技有限公司 | Treatment system for recycling flue gas waste heat |
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