CN207922266U - Wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system - Google Patents
Wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system Download PDFInfo
- Publication number
- CN207922266U CN207922266U CN201721560656.4U CN201721560656U CN207922266U CN 207922266 U CN207922266 U CN 207922266U CN 201721560656 U CN201721560656 U CN 201721560656U CN 207922266 U CN207922266 U CN 207922266U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- spray
- spray column
- level
- heat
- 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.)
- Expired - Fee Related
Links
- 239000003546 flue gas Substances 0.000 title claims abstract description 298
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 297
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 83
- 230000023556 desulfurization Effects 0.000 title claims abstract description 83
- 238000003303 reheating Methods 0.000 title claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 297
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 119
- 238000000034 method Methods 0.000 claims abstract description 65
- 239000007789 gas Substances 0.000 claims abstract description 61
- 230000008569 process Effects 0.000 claims abstract description 50
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 39
- 239000000779 smoke Substances 0.000 claims abstract description 29
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 76
- 239000002699 waste material Substances 0.000 claims description 51
- 238000001816 cooling Methods 0.000 claims description 29
- 238000004062 sedimentation Methods 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 17
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 22
- 239000002918 waste heat Substances 0.000 abstract description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000011593 sulfur Substances 0.000 abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 abstract description 4
- 238000005406 washing Methods 0.000 abstract description 4
- 239000000356 contaminant Substances 0.000 abstract description 2
- 239000003517 fume Substances 0.000 description 38
- 238000005507 spraying Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 14
- 238000004140 cleaning Methods 0.000 description 12
- 230000018044 dehydration Effects 0.000 description 11
- 238000006297 dehydration reaction Methods 0.000 description 11
- 235000019504 cigarettes Nutrition 0.000 description 10
- 239000003344 environmental pollutant Substances 0.000 description 10
- 231100000719 pollutant Toxicity 0.000 description 10
- 239000000428 dust Substances 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000005864 Sulphur Substances 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 241000208125 Nicotiana Species 0.000 description 2
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 210000000481 breast Anatomy 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 210000003298 dental enamel Anatomy 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010819 recyclable waste Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- -1 that is Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 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)
Abstract
The utility model discloses a kind of wet desulfurization flue gas to be dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system, wherein gas cooler and flue gas heater are equipped with water circulating pipe system between the two, and gas cooler provides heat to flue gas heater, to heat flue gas to be discharged；Desulfurizing tower, its underpart are connect by pipeline with gas cooler, to which the flue gas of gas cooler discharge is delivered to desulfurizing tower lower inside；Flue gas heater is connect with the smoke discharging pipe of spray column, and air is emitted into after demisting heating in flue gas heater through the flue gas to be discharged of spray process.The system can effectively solve the problem that wet desulfurization flue gas band water and contaminant problems, using the method for spray to the flue gas washing demisting dedusting after wet desulphurization；The recycling and utilization of waste heat in flue gas are not only realized, also so that aqueous dustiness reduces in the flue gas of discharge, eliminates plume, realizes that flue gas is de- white, saves a large amount of sulfur removal technology water.
Description
Technical field
The utility model is related to a kind of coal-burning wet desulfurization fume afterheat utilizing system and method, more particularly to a kind of fire coal
Wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system and method.
Background technology
Industrial expansion and the Modern Live of the mankind all be unable to do without the demand to the energy, especially to the demand of electric power.
As environmental pollution and energy shortage problem are increasingly serious, the mankind more pay attention to passing while accelerating to develop regenerative resource
The energy-saving work of system industry.Thermal power plant be both electricity power enterprise simultaneously and energy consumption enterprise, how to improve thermal power plant
Performance driving economy, reduction energy loss and pollutant emission have become the hot subject studied both at home and abroad.
And the primary energy in China is mainly derived from coal, the burning of coal necessarily will produce a large amount of pollutant emission,
Including the chemical substances such as flue dust and sulfur dioxide, nitrogen oxides.The electric power in China is due to mainly by coal-fired thermal motor
Group provides, therefore becomes first of various pollutants discharge industry.
In order to reduce the discharge of sulfur dioxide, country implements flue gas desulfurization in coal-burning power plant since 11th Five-Year, pacifies in succession
Desulphurization plant has been filled, and wet desulphurization is the sulfur removal technology mainly implemented.
A large amount of generations of haze in recent years so that a large amount of humid flue gas of wet desulphurization discharge become pair that people scold
As.Flue-gas temperature after wet desulphurization is about 50 DEG C or so, and water content (mass content) then reaches 10-15%, with a 300MW
For unit, it is more than 150 tons to the water of airborne release per hour.
And the water pH value condensed in flue gas is 1-2, contains a large amount of acidic materials, dissolved salt and insoluble composition granule so that
A large amount of dust and organic matter are generated in air, seriously endanger environment.
Although desulfurization fume largely discharges the approval agreed not yet to the influence that haze is formed with water, wet method is de-
It is undisputable fact that sulphur largely can aggravate haze with shredded tobacco for water pipes gas under extreme weather conditions, geographical conditions and seasonal conditions.
For the control measures with shredded tobacco for water pipes gas after wet desulphurization, at present it is generally acknowledged that 50 DEG C of flue gases that wet desulphurization is discharged
It is warmed to 80 DEG C of discharges, so that it may can't see the flue gas emission with water, it is believed that solve visual pollution；Also it is believed that, heats
Desulfurization fume afterwards can be lifted 100m, and diffusion reaches 100km, and pollutant can dilute.
It is to be noted, however, that the energy resource structure in China is different from most of developed countries, and can not possibly be in short-term
Interior change；Secondly, the geographical environment in China is different from foreign countries, such as Japan, and Japan is marine climate island country, and pollutant is very
It is easy diffusion；And China is continent shape and territory is wide, due to climate change in recent years, in unfavorable meteorology and geographical conditions
Lower pollutant is difficult diffusion；It has been discharged into the air, finally in addition, the water and pollutant contained therein of flue gas institute band are still
Or it to fall, especially swim in low latitude formation haze and pollute the environment.
Is exactly there are one the critical issue that cannot ignore, China it is populous, the rate of economic development is very fast, Zhong Duoqi
Industry will be huge to the superposition discharge capacity of humid flue gas after desulfurization in region so that be generated during high speed development huge
Big unfavorable factor.
Meanwhile will be discharged after flue gas, its waste heat can not be utilized, energy loss is also created, be unfavorable for thermal power plant
Performance driving economy and energy utilization.
The present inventor is transformed existing technology due to the above reasons, and it is de- to have devised coal-burning wet desulfurization fume
Water reheating UTILIZATION OF VESIDUAL HEAT IN exhaust system and method.
Utility model content
In order to overcome the above problem, present inventor has performed sharp studies, and it is de- to design a kind of coal-burning wet desulfurization fume
Water reheating UTILIZATION OF VESIDUAL HEAT IN exhaust system and method recycle cycle and Latent heat recycling cycle, fully by the way that obvious heat of smoke is arranged
Realize the recycling and utilization of waste heat in flue gas；Flue gas is carried out dehydrating, pollutant in flue gas is not only further cleaned, returns
A large amount of water has been received, water resource has been saved, has reduced the pollution of environment.
Specifically, the purpose of this utility model is to provide following aspect：
In a first aspect, a kind of coal-burning wet desulfurization fume is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN exhaust system, which includes：
Gas cooler 1 and flue gas heater 5 are equipped with water circulating pipe system, 1 high temperature cigarette of gas cooler between the two
Sensible heat in gas is supplied by waterpipe to flue gas heater 5, to heat flue gas to be discharged, the cooling water circulation of formation to cigarette
Gas Cooler 1 is simultaneously heated by high-temperature flue gas therein；
Desulfurizing tower 2, its underpart are connect by pipeline with gas cooler 1, and the flue gas to which gas cooler 1 to be discharged is defeated
It send to 2 lower inside of desulfurizing tower；With
Flue gas heater 5 is connect with the smoke discharging pipe of spray column, and the flue gas to be discharged through spray process is in flue gas
In device 5 air is emitted into after demisting heating；
Wherein, it is provided with the pipeline being connect with spray column above desulfurizing tower 2, flue gas is delivered to by spray by the pipeline
Cooling processing is carried out in tower.
The spray column is multistage setting, is preferably arranged to two level, including level-one spray column 3 and two level spray column 4；
Wherein, the smoke discharging pipe of 3 lower section of level-one spray column is connect with the smoke-intake pipe road of two level spray column 4；Two level spray column 4
The drainage pipeline of lower section is connect with the spray head of level-one spray column 3.
The spray head of the two level spray column 4 is connect by pipeline with spray feed cistern 9；The row of the two level spray column 4
Smoke pipeline is connect with the flue with flue gas heater 5.
The spray column may be arranged as level-one spray column 3, and the spray head of the level-one spray column 3 passes through pipeline and spray
Feed cistern 9 is drenched to connect；The smoke discharging pipe of the level-one spray column 3 is connect with the flue with flue gas heater 5.
The smoke discharging pipe of 2 top of the desulfurizing tower is connect with the smoke-intake pipe road on 3 top of level-one spray column.
The drainage pipeline of 3 lower section of the level-one spray column is connect with sedimentation basin 6；
Sedimentation basin 6 is connect with water treatment component 7 is removed；
Water treatment component 7 is gone to be connected with heat pump unit 8；
Heat pump unit 8 is connect with spray feed cistern 9.
Second aspect, the utility model additionally provide a kind of coal-burning wet desulfurization fume dehydration reheating using above system
UTILIZATION OF VESIDUAL HEAT IN discharge method, this method include：
The sensible heat that the flue gas being discharged in coal-burning boiler is recycled using gas cooler 1, makes the temperature of flue gas reduce, and will return
The heat circulation of receipts supplies flue gas heater 5；
Flue gas after cooling enters desulfurizing tower 2 to carrying out desulfurization process；Spraying cooling is carried out to the flue gas after desulfurization process
Processing, the latent heat of recovered flue gas release；
Treated that flue gas is emitted into air after the heat treatment of flue gas heater 5 for spraying cooling.
Flue gas after desulfurization process is handled by spraying cooling so that the temperature of flue gas is at 35 DEG C or less.
Spray-water cycle in spray-water pond 9 is used for flue gas spraying cooling.
Flue gas is emitted into air after flue gas heater 5 is heated to 45~60 DEG C through chimney 10.
Advantageous effect possessed by the utility model includes：
(1) cleaning dust is dehydrated by spray and solves the problems, such as to have smoke evacuation water amount after wet desulphurization big, pass through spray
Drenching direct heat transfer reduces flue-gas temperature, can the water in flue gas be removed 60% or more；
(2) it installs washing dehydration integration apparatus additional after desulfurizing tower, has reached ＜ 5mg/m in smoke evacuation3Dust discharge standard；
(3) residual gypsum carried in desulfurization fume is deposited in sedimentation basin by spray washing, to solve stone
Cream rain phenomenon；
(4) a large amount of vapor being discharged with flue gas have aggravated the pollution of air, also waste water resource, pass through fume-dehydrating
Water is stayed in and is used on the ground, water resource has been saved；
(5) use in conjunction of spray dehydration cleaning dust and flue gas heater can solve after fume-dehydrating cools down to flue gas
The influence of lifting, meanwhile, solve the problems, such as that flue gas is too low and freeze in winter have the effect of eliminating plume, reached flue gas
It is de- white；
(6) a large amount of latent heat are released during flue gas cool-down, spray can be given to provide lower temperature by heat pump techniques
Condensed water reduces Sprayer Circulation water；Meanwhile the heat of recycling can be also used for other heat supplies；
(7) water is consistent with flue gas flow direction when spray dehydration, increases the superposition power of flue gas, therefore, system operation more saves
Can, reduce energy consumption.
Reference numeral
1- gas coolers
2- desulfurizing towers
3- level-one spray columns
4- two level spray columns
5- flue gas heaters
6- sedimentation basins
7- removes water treatment component
8- heat pump units
9- sprays feed cistern
10- chimneys
Description of the drawings
Fig. 1 shows to be illustrated according to the coal-burning wet desulfurization fume system for utilizing dewatering waste heat of the utility model embodiment one
Figure；
Fig. 2 shows illustrated according to the coal-burning wet desulfurization fume system for utilizing dewatering waste heat of the utility model embodiment two
Figure.
Specific implementation mode
The utility model is further described below by drawings and examples.By these explanations, this practicality is new
The characteristics of type and advantage will become more apparent from clear.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.Although each of embodiment is shown in the accompanying drawings
In terms of kind, but unless otherwise indicated, it is not necessary to attached drawing drawn to scale.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other not
Constituting conflict can be combined with each other.
It is found in fume treatment research, the flue-gas temperature being discharged in coal burning boiler of power station is usually relatively high, generally 120
DEG C or more, such as 150 DEG C, therefore, if recycling and utilizing the thermal energy in this high-temperature flue gas, can effectively it reduce in flue gas
Energy loss；
In addition, the high-temperature flue gas being discharged in coal-burning boiler typically contains a large amount of sulphur-containing substance and grit, desulfurization is being carried out
In processing, the sulphur-containing substance and grit in high-temperature flue gas are cleaned, and the temperature of flue gas further decreases, and gradually releases latent
Heat.
Therefore, it for the high-temperature flue gas being discharged in coal-burning boiler, recycles its waste heat (sensible heat and latent heat) and is used, no
Only be conducive to energy saving, additionally it is possible to improve the economic benefit of enterprise.
On the basis of fully studying fume treatment, the utility model provides a kind of coal-burning wet desulfurization fume dehydration
Reheating UTILIZATION OF VESIDUAL HEAT IN exhaust system and method.
The wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN discharge method：
The sensible heat for recycling the flue gas being discharged in coal-burning boiler, makes the temperature of flue gas reduce, and the heat circulation of recycling is supplied
To flue gas heater 5；
Flue gas after cooling enters desulfurizing tower 2 to carrying out desulfurization process；
Spraying cooling processing, the latent heat of recovered flue gas release are carried out to the flue gas after desulfurization process；
Spraying cooling treated flue gas is emitted into air after the heat treatment of flue gas heater 5 through chimney 10.
In a preferred embodiment, the flue gas being discharged in coal-burning boiler can be recycled by gas cooler 1
With the thermal energy in utilization flue gas.
The gas cooler 1 can use gas cooler equipment commonly used in the prior art, it is preferable to use enamel
Heat pipe low-level (stack-gas) economizer.The low-level (stack-gas) economizer is corrosion-resistant, it is low temperature resistant, can dust-proof dust stratification, safety in operation is high, such as patent
Enamel heat pipe low-level (stack-gas) economizer described in ZL2014100055362.
Since the flue-gas temperature being discharged in coal-burning boiler is relatively high, for the sensible heat in abundant recovered flue gas, it is preferred that make
Recycling and the profit of smoke heat energy are carried out with concatenated two-stage gas cooler 1 (level-one gas cooler and secondary smoke cooler)
With the thermal energy in abundant recovered flue gas farthest reduces the temperature of flue gas to 80~90 DEG C, preferably drops the temperature of flue gas
To 85~90 DEG C.
After the cooling of gas cooler 1 processing, flue gas enters immediately carries out desulfurization process in desulfurizing tower 2.
In desulfurization treatment process, the flue-gas temperature into desulfurizing tower 2 is generally not more than 90 DEG C.This is because, working as flue gas
Temperature it is higher when, such as at 120 DEG C, the speed that flue gas is raised above is fast, and the desulfurization process liquid in desulfurizing tower 2 connects with flue gas
Touch time shortening so that the requirement of prior art standard is not achieved in the effect of flue gas desulfurization processing；
In addition, contain a large amount of sulfuric acid substance in the waste liquid collected due to 2 lower inside of desulfurizing tower, it can be to desulfurizing tower
2 generate corrosiveness；When flue-gas temperature is higher, after desulfurization process liquid and flue gas heat exchange so that the waste liquid temperature of generation
It increases, accelerates corrosiveness of the acid waste liquid to desulfurizing tower 2.
In the prior art, also there is the whitewashing liquid for installing spraying temperature lowering apparatus additional before desulfurizing tower 2 or increasing in desulfurizing tower 2
Amount, to be lowered into the temperature of flue gas in desulfurizing tower 2, this can increase the water consume and energy consumption during desulfurization process, increase flue gas
The financial burden of processing.
Therefore, pass through the processing of concatenated two-stage gas cooler so that the temperature of high-temperature flue gas significantly reduces, in flue gas
Sensible heat (for example, 130 DEG C to 90 DEG C thermal energy) be used directly for heat supply.For example, reducing the steaming extracted needed for power plant's heat supply
Vapour；Alternatively, sending thermal energy back to low adding system to reduce low plus pumping when summer is for thermal energy affluence；Or thermal energy is supplied in it
The instrument of thermal energy needed for him；
Flue gas is handled by concatenated two-stage gas cooler, makes flue gas cool-down, additionally it is possible to during reducing desulfurization process
Quantity of circulating water and energy consumption.
In a preferred embodiment, the heat circulation of recycling is supplied flue gas heater by the gas cooler 1
5, for example, as shown in Figure 1, gas cooler 1 is connect with flue gas heater 5 by circulating water pipeline and forms cycle, flue gas is cold
But the thermal energy of recycling is supplied by recirculated water to flue gas heater 5 and is used by device 1, by flue gas to exhaust temperature, is conducive to row
Cigarette optimizes.
The gas cooler 1 is that the mode of 5 circulation heating of flue gas heater can be a variety of, as long as can realize that heat is followed
Ring.Preferably, heat supply is carried out using recirculated water, that is, gas cooler 1 is heated water using the thermal energy recycled in flue gas
Afterwards, hot water flows to flue gas heater 5 by cycle cooling plating drum, and flue gas heater 5 utilizes the energy heats flue gas in hot water
Afterwards, the temperature of hot water reduces, and is back to gas cooler 1 again and is heated.
It is furthermore preferred that gas cooler 1 by circulating water heating to after 85-95 DEG C, flue gas heater is flow to by circulating pump
5, flue gas heater 5 after the energy heats flue gas in recirculated water using gas cooler 1 is back to, at this point, the temperature of recirculated water
It is 55-65 DEG C.
In a preferred embodiment, due to containing a large amount of grits in flue gas, in the gas cooler of two-stage series connection
Between deduster is set, it is possible to reduce the grit in flue gas, improve gas cleaning effect.
The flue gas being discharged from gas cooler 1 is introduced into desulfurizing tower 2 by flue, it can also be by air-introduced machine by cigarette
Pneumatic transmission enters desulfurizing tower 2 and carries out desulfurization process.
Wherein, the desulfurizing tower 2 does not further limit, and any flue gas desulfurization in the prior art can be selected to set
It is standby, it disclosure satisfy that the demand of power plant desulfurization processing can be, it is preferable to use the wet desulphurization mode of spray carries out at desulfurization flue gas
Reason.
The study found that after wet desulphurization processing, the temperature of flue gas is down to 50~55 DEG C, and with mass content be 10~
15% water；In the flue gas of desulfurization process, moisture is in gaseous state or in superfine small water mist state, the grit and sulfur-bearing of interior remaining
Substance can be with flue gas emission to aerial, increase environmental pollution and visual pollution.
Therefore, in order to avoid water and pollutant emission entrained in wet desulphurization treated desulfurization fume to air
In, it is necessary to cleaning cooling is carried out to flue gas, to reduce the moisture and pollutant in flue gas.
It is preferable to use condensation process in the utility model reduces the temperature of desulfurization fume, makes the gaseous state water condensation in flue gas
For the water of liquid, so that superfine small water mist condensation is become larger, to make the hydrogenesis in flue gas be precipitated, reduce the water in flue gas
Divide content.
The method by desulfurization fume cooling can use spray column, heat exchanger etc., in the present invention, preferably
Cooled down to desulfurization fume using spray column.
In a preferred embodiment, by wet desulphurization, treated that desulfurization fume is cooled to 35 DEG C or less.
Preferably, setting multi-stage spray tower cools down to desulfurization fume, for example, by way of two-stage cooling, will take off
The temperature of sulphur flue gas is gradually reduced to 35 DEG C or less.
When being set as two-stage spray column, it is preferred that desulfurization fume is passed through in level-one spray column 3 and carries out level-one cooling,
It is exchanged heat by spraying, the temperature of desulfurization fume is down to 40~45 DEG C, for example, 43 DEG C；The flue gas flowed out in from level-one spray column 3
Two level cooling is carried out into two level spray column 4, is exchanged heat by spraying, the temperature of flue gas is further reduced to 35 DEG C or less.
It is furthermore preferred that desulfurization fume is passed through from the top of level-one spray column 3 in level-one spray column 3, at this point, flue gas and spray
The flow direction of leaching is consistent, and spray can increase power to flue gas, will not additionally increase the resistance of flue gas system；
For flue gas after spray process by the pipeline of 3 lower section of level-one spray column, the effect through air-introduced machine enters two with pipeline
In grade spray column 4.Flue gas can enter from the top of two level spray column 4 in two level spray column 4, useless in 4 bottom end of two level spray column
Smoke discharging pipe is arranged in the ullage of liquid, and flue gas is emitted into the flue gas for being provided with flue gas heater 5 by the effect of air-introduced machine
In pipeline.At this point, flue gas is consistent with the flow direction of spray, spray can increase power to flue gas, equally will not additionally increase flue gas system
The resistance of system；Flue gas passes through secondary cleaning and cooling, and the effect of dehydration and depositing dust has been better achieved.
Two level spray column can be in this way, the position that flue gas is introduced to two level spray column 4 from level-one spray column 3 be low
Spray head in two level spray column 4, so that flue gas can be handled all by cleaning showers, then flue gas is from two level spray column 4
The smoke discharging pipe on top is emitted into the flue for being provided with flue gas heater 5.Such setting can make the spray of flue gas
Time lengthening, cooling and cleaning performance are more preferable.
The multistage setting of three-level, level Four of spray column etc. can also be carried out on the basis of spray column two-stage arrangement.
In spray column, heat exchange has occurred during spray liquid and smoke contacts, while also being cleaned to flue gas；Spray
Drench liquid impact force it is larger when, into spray column flue gas under the action of spray liquid downward impact force, by spray liquid impact disperse
Be tiny bubble hence into spray waste liquid in, tiny flue gas in waste liquid have very big specific surface area, increase flue gas
With the contact area of waste liquid so that waste liquid is obviously improved the cooling and cleaning action of flue gas.
In another preferred embodiment, a spray column is set in the system, that is, level-one spray column；It is logical
Cross increasing spray liquid measure so that flue gas, which is handled in level-one spray column by spraying cooling, can be down to 35 DEG C or less.
In system of the setting there are one spray column, such as shown in Figure 2, the lower part of the level-one spray column 3 passes through
Interconnecting piece is connected to the flue for being provided with flue gas heater 5.The interconnecting piece has certain altitude, in level-one spray column 3
Waste liquid after spray process collects in lower end in tower, and the bottom end of flue is flow to along interconnecting piece, 3 bottom end of level-one spray column, connection
Portion and flue bottom end form a pond for collecting spray waste liquid.
The lower part of the level-one spray column 3 can with dilatation formed one collect spray waste liquid pond, the pond with
It is provided with the flue connection of flue gas heater 5.
Being equipped in the lower part of level-one spray column 3 or the flue being connected to 3 bottom end of level-one spray column will converge in level-one spray column 3
Collection sprays discharging of waste liquid to the drainage pipeline of sedimentation basin 6, to reduce the waste liquid storage in spray column.
Preferably, the liquid level of the waste liquid is less than the height of interconnecting piece, in this way, when flue gas and spray liquid fair current to tower
When interior lower section, flue gas can be flowed into the gap on interconnecting piece top in the flue being connected to flue gas heater 5 by waste liquid.Or
Smoke discharging pipe is set in the lower end of level-one spray column 3, flue gas is led into flue gas heater 5.
In a kind of preferred embodiment, in the level-one spray column 3, the liquid level of the waste liquid is not less than company
The height of socket part.In this way, can only be given up in flue bottom end by the tiny flue gas bubble that spray liquid impact is dispersed into spray waste liquid
The liquid level of liquid escapes, and increases the time of contact of flue gas and waste liquid, improves the effect of flue gas cool-down and cleaning.
In system provided by the utility model, spray direction is consistent with flow of flue gas direction in spray column, increases flue gas
Power, reduce the resistance of system blower.
The study found that flue gas, after spray process, 60% or more vaporous water and tiny water mist are changed into liquid in flue gas
State water, wherein the acidic materials carried, dissolved salt and insoluble composition granule enter in spray waste liquid so that the waste liquid after spray is in acid
Property, it sprays and the flushing depositing dust of flue gas is acted on significantly.
Spray process also makes residual gypsum particle entrained in desulfurization fume be deposited in sedimentation basin, to solve
The phenomenon that gypsum rain, this is that electric precipitator cannot achieve.
Spray process makes desulfurization fume have the function that dehydration, cooling and depositing dust, reduces moisture and dirt in flue gas
The discharge quantity for contaminating object, reduces dustiness in the flue gas of discharge, is conducive to the generation for slowing down haze.
In the present invention, the spray column is connect with spray feed cistern 9, and the spray feed cistern 9 carries for spray column
For spray-water.
In a kind of embodiment of the utility model, be provided with level-one spray column in system, the spray feed cistern 9 with
The spray head of level-one spray column connects；
In the another embodiment of the utility model, when being provided with multi-stage spray tower in system, spray-water exists
Recycling in different spray columns.
For example, when being provided with two-stage spray column, preferably two level spray column 4 is connect with spray feed cistern 9, sprays feed cistern
Spray-water in 9 flows into two level spray column 4 first by spray pump, to after the flue gas spray process of level-one spray column 3,
Collect in the lower end of two level spray column 4；Then the spray waste liquid 4 interior lower end of two level spray column collected flows into level-one with pipeline
Spray column 3 is re-used for spraying cooling by spray pump and handles the desulfurization fume from desulfurizing tower 2, and spray waste liquid collects in one
The lower end of grade spray column 3.
Spray column plural serial stage is arranged the deposits such as acidic materials, dissolved salt and the insoluble composition granule made in flue gas and finally converges
Collection is in the spray waste liquid of level-one spray column 3, it is not necessary to which spray column carries out waste collection and spray column cleaning one by one, is received convenient for unified
Collection and removing, reduce the workload of fume treatment.
The concatenated setting of multi-stage spray tower is simple and easy, moreover it is possible to improve the utilization rate of spray-water, reduce at spraying cooling
Water consumption is used in reason.
During spray process, vaporous water and pole mist droplet in desulfurization fume become liquid by direct spraying cooling
A large amount of latent heat can be released when state water, spray-water, by heat exchange, fully absorbs the latent heat of flue gas release, by this with flue gas
Heat recovery has prodigious economic benefit for undertaking heating enterprise.
The temperature of spray-water in spray feed cistern 9 is not higher than 35 DEG C, preferably 28~32 DEG C, spray-water and flue gas
After thermal energy exchange occurs, the temperature of flue gas reduces, and sprays the temperature rise of waste liquid to 40~45 DEG C, dives to realize in flue gas
The recycling of heat.
Spray waste liquid after heating can be thus achieved to the heat energy utilization of recovery waste heat by heat pump unit 8.
Waste liquid is sprayed in acidity, and contains a large amount of insoluble waste.The waste liquid of the acidity can be generated into corrosion to equipment
Effect, after carrying out wastewater treatment to waste liquid, the thermal energy in the recyclable waste liquid of.
In the present invention, it is preferred that the pipeline that 3 lower section of level-one spray column is arranged is connected with sedimentation basin 6, removes Shui Chu
The spray waste liquid that reason component can collect 3 lower section of level-one spray column introduces sedimentation basin 6.Spray the insoluble waste deposit in waste liquid
Waste collection is carried out in sedimentation basin 6, or by existing other technologies (such as filtering) so that spray waste liquid realizes solid-liquid point
From achieving the purpose that preliminary purification.
Sedimentation basin 6 is connected to water treatment component 7 is removed, and the waste liquid of preliminary purification is through going to the place of water treatment component 7 in sedimentation basin 6
Reason, is in neutrality, can be used again as spray-water in system provided by the utility model substantially, will not be in system
Equipment generates corrosiveness.
Preferably, water treatment component 7 is gone to connect heat pump unit 8, by what is obtained after the processing for going the interior outflow of water treatment component 7
Spray-water introduces heat pump unit 8 and carries out heat exchange；Heat pump unit 8 recycles thermal energy therein, and by the thermal energy of recycling for heat
It can supply, such as the heat supply network return water for heating power plant, which not only improves the utilizations of energy, reduce the loss of energy, also
Improve the economic benefit of heating enterprise.
After heat pump unit 8 recycles the thermal energy of the spray-water of recycling, water temperature reduces, and preferably water temperature is 35 DEG C hereinafter, more
It is preferred that at 32 DEG C or less.
Heat pump unit 8 is connected with spray feed cistern 9, and the spray-water of recycling is introduced into spray feed cistern 9, is re-used for
The spraying cooling of spray column operates, and reduces in spray process and uses water consumption.
With the increase of processing time, the moisture in flue gas is recovered, and the spray-water sprayed in feed cistern 9 gradually increases
Add, at this point, rich spray-water can be also used for other process waters, such as rich spray-water is sent into desulfurizing tower 2
Interior recycling can effectively reduce desulfurization rate of water make-up, save water resource.
Flue-gas temperature after spray process is relatively low, the smoke discharging effect of flue gas can be reduced when flue-gas temperature is too low so that cigarette
The lifting and diffusion of gas are relatively difficult；In addition, when winter environment temperature is relatively low, remaining moisture can be in chimney breast in flue gas
It freezes.
In the present invention, it is preferred that flue gas enters with flue in flue gas heater 5, and flue gas heater 5 is utilized and come from
After flue gas demisting after spray process is heated to 45~60 DEG C by the smoke heat energy that gas cooler 1 recycles, discharged through chimney 10
To air.
It will be discharged after flue gas demisting heating after spray process, be conducive to the lifting and diffusion of flue gas, flue gas is agitated in reduction
The resistance of mobile wind turbine makes flue gas eliminate plume, realizes that flue gas is de- white, eliminates visual pollution；Moisture in flue gas after heating
It further decreases, the icing phenomenon that chimney 10 exports when hot flue gas can also eliminate winter smoke evacuation.
The utility model additionally provides a kind of coal-burning wet desulfurization fume dehydration reheating UTILIZATION OF VESIDUAL HEAT IN using the above method
Exhaust system, in the system,
Gas cooler 1 is connect with flue gas heater 5 by water circulating pipe system, the flue gas being discharged in coal-burning boiler into
Enter gas cooler 1, which is simultaneously supplied to cigarette by the sensible heat in 1 recovered flue gas of gas cooler by water circulating pipe system
Hot-air heater 5；
Wherein, the temperature of flue gas into the gas cooler 1 is not less than 120 DEG C, and flue gas flows out the gas cooler 1
Temperature be 80~90 DEG C, preferably 85~90 DEG C.
The flue of 2 lower section of gas cooler 1 and desulfurizing tower connect, and flue gas is from the discharge of gas cooler 1, through flue from desulfurization
The lower section of tower 2 flows into and carries out desulfurization process in desulfurizing tower 2, and flue gas becomes desulfurization fume after desulfurization process, collects in desulfurizing tower 2
Top；
The temperature of the desulfurization fume is 50~55 DEG C, wherein the water for being 10~15% with mass content.
On 2 top of desulfurizing tower, the pipeline of setting and the top of spray column connect, and desulfurization fume is flowed out through 2 top of desulfurizing tower,
And enter spray column from the top of spray column and carry out spray process so that the temperature of flue gas is down to 35 DEG C or less.
In a preferred embodiment, the flue gas is handled by multi-stage spray, for example, at by two-stage spray
Reason.
When being provided with two-stage spray column in system, the top of the pipeline and level-one spray column 3 of setting on 2 top of desulfurizing tower
Connection, desulfurization fume is flowed out through 2 top of desulfurizing tower, and is entered level-one spray column 3 from the top of level-one spray column 3 and carried out from spray
Reason, after level-one spray process, the temperature of flue gas is preferably dropped to 40~45 DEG C；
It is preferred that in the two-stage spray column, the smoke-intake pipe of the smoke discharging pipe and two level spray column of 3 lower section of level-one spray column
Road connects, and smoke discharging pipe of the flue gas in level-one spray column 3 after spray process through 3 lower section of level-one spray column is moved to two level
In spray column 4.
In 4 top of two level spray column setting smoke-intake pipe road, flue gas enters in two level spray column 4, in 4 bottom end of two level spray column
Smoke discharging pipe is arranged in the ullage of waste liquid；At this point, flue gas is consistent with the flow direction of spray, spray can increase power to flue gas, together
Sample will not additionally increase the resistance of flue gas system；Flue gas passes through secondary cleaning and cooling, and dehydration and depositing dust has been better achieved
Effect.
Alternatively, height of the smoke-intake pipe road height of two level spray column 4 less than spray head in two level spray column 4, and in two level
Smoke discharging pipe is arranged in 4 top of spray column；Such setting can be such that the spray time of flue gas extends, and cooling and cleaning performance are more
It is good.
For flue gas after 4 spray process of two level spray column, the temperature of flue gas is down to 35 DEG C or less.
In another preferred embodiment, a spray column is set in the system, that is, level-one spray column；It is logical
Cross increasing spray liquid measure so that flue gas is down to 35 DEG C or less in level-one spray column 3 by spraying cooling.
Preferably, the spray column is connect with the flue for being provided with flue gas heater 5, the cigarette being discharged out of spray column
Gas, which enters in flue gas heater 5, to be heated.
In a preferred embodiment, it is provided with multi-stage spray tower in system, such as shown in Fig. 1, is provided with two-stage
Spray column.By spray process, flue gas collects in the top of two level spray column 4, and the top of two level spray column 4 is equipped with to be added with flue gas
The pipeline that hot device 5 is connected to, flue gas enter flue gas heater 5 by the pipeline of 4 top of two level spray column；Flue gas heater 5 utilizes
Flue gas from two level spray column 4 to exhaust temperature is reached defogging effect by the thermal energy that gas cooler 1 supplies.
In multi-stage spray tower, such as in two level spray column, flue gas can also enter from the top of two level spray column 4, from
4 bottom end waste liquid ullage of two level spray column sets the pipeline being connected to flue gas heater 5 through air-introduced machine discharge.
In another preferred embodiment, a spray column is set in the system, such as shown in Fig. 2, setting
There are level-one spray column 3, its underpart to be connected to the flue for being provided with flue gas heater 5 by interconnecting piece.
Preferably, the liquid level of 3 waste liquid of level-one spray column is less than the height of interconnecting piece, after spray process,
Flue gas is flowed into the gap on interconnecting piece top in the flue being connected to flue gas heater 5 by waste liquid.
In a kind of preferred embodiment, in the level-one spray column 3, the liquid level of the waste liquid is not less than company
The height of socket part is escaped by the tiny flue gas bubble that spray liquid impact is dispersed into spray waste liquid in the liquid level of flue bottom end waste liquid
Go out, is directly entered in the flue being connected to flue gas heater 5.
It is preferred that flue gas demisting is heated to 45~60 DEG C by the flue gas heater 5, moisture remaining in flue gas is made to become gas
State is realized and eliminates plume, it is white to achieve the effect that flue gas takes off；Flue gas demisting heats the lifting height that can also be lifted flue gas, is conducive to cigarette
Gas is spread.
Flue gas after heating is emitted into air by chimney 10, chimney breast will not be caused to freeze in cold snap.
In the utility model, the spray-water in spray column, preferably will spray feed cistern 9 and spray from spray feed cistern 9
Drench tower connection.
In one embodiment, it is provided with multi-stage spray tower in system, as shown in Figure 1, being provided with two-stage spray column, sprays
Leaching feed cistern 9 is connect by spray pump with the spray head in two level spray column 4, by spray pump, sprays the water warp in feed cistern 9
Spray head in two level spray column 4 sprays, and carries out spray process to flue gas, spray waste liquid collects in the lower end of two level spray column 4；
4 lower end of two level spray column is equipped with drainage pipeline, and is connect with the spray head in level-one spray column 3；Use spray pump
The spray waste liquid of 4 lower end of two level spray column is extracted, and the spray waste liquid is sprayed by the spray head of level-one spray column 3, to coming
Spray process is carried out from the desulfurization fume of desulfurizing tower 2, the spray waste liquid after spray concentrates on the lower section of level-one spray column 3.
In another embodiment, level-one spray column is provided in system, as shown in Fig. 2, the spray feed cistern 9 with
The spray head of level-one spray column 3 connects, and spray process, the spray waste liquid after spray are carried out to the desulfurization fume from desulfurizing tower 2
Concentrate on the lower section of level-one spray column 3.
The lower section of level-one spray column 3 is provided with the pipeline of connection sedimentation basin 6, spray waste liquid enters sedimentation basin 6 through pipeline
Carry out solid-liquid separation treatment.
Sedimentation basin 6 is connect with water treatment component 7 is removed, in sedimentation basin 6 waste liquid of preliminary purification in removing water treatment component 7 into
Row processing, with the water in Recycling of waste liquid, can use as spray-water again.
It goes water treatment component 7 and heat pump unit 8 to connect, the spray-water stream obtained after processing in water treatment component 7 will be removed
Enter heat pump unit 8, heat pump unit 8 recycles thermal energy therein and the thermal energy of recycling is used for heat supply.
The temperature of the spray-water of recycling is down to 35 DEG C hereinafter, more preferably at 32 DEG C or less.
Heat pump unit 8 is connected to spray-water pond 9, and spray-water after cooling flows into spray after the outflow of heat pump unit 8
Feed cistern 9, the spray process being re-used in spray column.
Coal-burning wet desulfurization fume dehydration reheating UTILIZATION OF VESIDUAL HEAT IN exhaust system provided by the utility model and method can have
Effect solves wet desulfurization flue gas band water and contaminant problems, is removed to the flue gas washing demisting after wet desulphurization using the method for spray
Dirt, dustiness ＜ 5mg/m in smoke evacuation3；The recycling and utilization of waste heat in flue gas are not only realized, also so that containing in the flue gas of discharge
Water dustiness is low, eliminates plume, realizes that flue gas is de- white, saves a large amount of sulfur removal technology water.
Embodiment
Embodiment 1
Unit installed capacity：330MW units；
Amount of flue gas emission：110×104Nm3/h(396kg/s)；
Exhaust gas temperature before desulfurization：153℃；
As shown in Figure 1,145 DEG C of flue gas is passed through the sensible heat in 1 recovered flue gas of gas cooler, the temperature of flue gas is down to
85℃；57 DEG C of water in water circulating pipe system are heated to 88 DEG C.
Flue gas enters desulfurizing tower 2 and carries out desulfurization process, and after the completion of desulfurization process, the temperature of flue gas is 55 DEG C；In desulfurization cigarette
In gas, the volume content of moisture is 15.97% (mass fraction 10%)；
Flue gas enters level-one spray column 3 with pipeline by 3 top of level-one spray column, by first time spray process, flue gas
Temperature is down to 43 DEG C；
Enter two level spray column 4 with pipeline after flue gas, by second of spray process, the temperature of flue gas is down to 34 DEG C；
Water content is 4% in flue gas；
When flue gas flows through flue gas heater 5, flue gas is warming up to 45 DEG C and is discharged by chimney 10.
Wherein, for the spray-water in two level spray column 4 from spray feed cistern 9, water temperature is 28 DEG C；Spray-water passes through two
After secondary spray process, water temperature becomes 40 DEG C；
The spray waste liquid of 3 lower section of level-one spray column is through sedimentation basin 6 and after going the processing of water treatment component 7, into heat pump machine
Group 8, heat pump unit 8 recycle thermal energy therein and are used for heat supply；And the spray-water temperature recycled is down to 28 DEG C.
Embodiment 2
Unit installed capacity：330MW units；
Amount of flue gas emission：110×104Nm3/h(396kg/s)；
Exhaust gas temperature before desulfurization：150℃；
As shown in Figure 1,150 DEG C of flue gas is passed through the sensible heat in 1 recovered flue gas of gas cooler, the temperature of flue gas is down to
90℃；60 DEG C of water in water circulating pipe system are heated to 90 DEG C.
Flue gas enters desulfurizing tower 2 and carries out desulfurization process, and after the completion of desulfurization process, the temperature of flue gas is 55 DEG C；In desulfurization cigarette
In gas, the volume content of moisture is 15.97% (mass fraction 10%)；
Flue gas enters level-one spray column 3 with pipeline by 3 top of level-one spray column, by first time spray process, flue gas
Temperature is down to 43 DEG C；
Enter two level spray column 4 with pipeline after flue gas, by second of spray process, the temperature of flue gas is down to 35 DEG C；
Water content is 4% in flue gas；
When flue gas flows through flue gas heater 5, flue gas is warming up to 60 DEG C and is discharged by chimney 10.
Wherein, for the condensed water in two level spray column 4 from spray feed cistern, water temperature is 30 DEG C；Condensed water by spraying twice
After leaching processing, water temperature becomes 42 DEG C；
Neutralisation treatment of the condensate liquid through past water treatment component 6 after 3 lower section spray of level-one spray column, into heat pump unit
8, heat pump unit 8 recycles thermal energy therein and is used for heat supply；And the temperature of condensate liquid is down to 30 DEG C.
Wherein, if desulfurization fume is directly discharged in air, water content is in desulfurization fume per hour：
396kg/s × 10% × 3600=142560kg/h=142.56t/h
It is found that water amount is 142.56 tons in the flue gas that a 330MW unit is discharged into air per hour.
Flue gas is after spray is dehydrated, and water content is in flue gas per hour：
396kg/s × 4% × 3600=57.024t/h
It compares and is not dehydrated flue gas, it is few in the flue gas that a 330MW unit is discharged to air per hour after dehydration
85.536t water, the yield of water has reached 60% in flue gas.
The thermal energy recycled in flue gas is divided into sensible heat and latent heat, wherein
The thermal energy of sensible heat is：
Flue gas is down to 90 DEG C by 150 DEG C, and the thermal energy of recycling is 24264.9kW.
The thermal energy of latent heat is：
Saturation state enthalpy is 346.7kJ/kg when 55 DEG C of desulfurization fume, and the thermic load of gas inlet is：396kg/s×
346.7kJ/kg=137293kW；
Flue gas saturation state enthalpy at 35 DEG C is 165.8kJ/kg after spray, and the thermic load of gas inlet is：396kg/s
× 165.8kJ/kg=65656.8kW；
The thermal energy of recycling is：137293-65656.8=71636.2kW
Therefore, the waste heat that can extract 95905.1kW in flue gas altogether is used.
After testing, dustiness is 4.9mg/m in smoke evacuation3。
In the description of the present invention, it should be noted that the fingers such as term "upper", "lower", "inner", "outside" " preceding " " rear "
The orientation or positional relationship shown is to be merely for convenience of describing based on the orientation or positional relationship under utility model works state
The utility model and simplified description, do not indicate or imply the indicated device or element must have a particular orientation, with spy
Fixed azimuth configuration and operation, therefore should not be understood as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation "
" connected " " connection " should broadly understood, for example, it may be being fixedly connected, may be a detachable connection, or integrated connection
Commonly；It can be mechanical connection, can also be electrical connection；Can be directly connected to, can also be indirectly connected with by intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
The utility model is illustrated above in association with preferred embodiment, but these embodiments are only models
Example property, only play the role of illustrative.On this basis, a variety of replacements and improvement can be carried out to the utility model, these
It each falls in the scope of protection of the utility model.
Claims (9)
1. a kind of wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system, which is characterized in that the system includes：
Gas cooler (1) and flue gas heater (5) are equipped with water circulating pipe system, gas cooler (1) high temperature between the two
Sensible heat in flue gas is supplied by waterpipe to flue gas heater (5), to heat flue gas to be discharged, the cooling water circulation of formation
It is heated to gas cooler (1) and by high-temperature flue gas therein；
Desulfurizing tower (2), its underpart are connect by pipeline with gas cooler (1), to the flue gas that gas cooler (1) is discharged
It is delivered to desulfurizing tower (2) lower inside；With
Flue gas heater (5), connect with the smoke discharging pipe of spray column, and the flue gas to be discharged through spray process is in flue gas heater
(5) in air is emitted into after demisting heating；
Wherein, it is provided with the pipeline being connect with spray column above desulfurizing tower (2), flue gas is delivered to by spray column by the pipeline
Inside carry out cooling processing；
Spray waste liquid enters sedimentation basin (6) through pipeline and carries out solid-liquid separation treatment, and sedimentation basin (6) connects with water treatment component (7) is removed
It connects；
Water treatment component (7) is gone to be connected with heat pump unit (8)；
Heat pump unit (8) is connect with spray feed cistern (9).
2. wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system according to claim 1, which is characterized in that institute
It includes level-one spray column (3) and two level spray column (4) to state spray column.
3. wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system according to claim 2, which is characterized in that one
Smoke discharging pipe below grade spray column (3) is connect with the smoke-intake pipe road of two level spray column (4)；
Drainage pipeline below two level spray column (4) is connect with the spray head of level-one spray column (3).
4. being dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system according to wet desulfurization flue gas described in Claims 2 or 3, feature exists
In the spray head of the two level spray column (4) is connect by pipeline with spray feed cistern (9).
5. wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system according to claim 4, which is characterized in that institute
The smoke discharging pipe for stating two level spray column (4) is connect with the flue with flue gas heater (5).
6. wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system according to claim 1, which is characterized in that institute
It states spray column and is set as level-one spray column (3), the spray head of the level-one spray column (3) passes through pipeline and spray feed cistern (9)
Connection.
7. wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system according to claim 6, which is characterized in that institute
The smoke discharging pipe for stating level-one spray column (3) is connect with the flue with flue gas heater (5).
8. being dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system according to the wet desulfurization flue gas of claim 2 or 6, feature exists
In the smoke discharging pipe above the desulfurizing tower (2) is connect with the smoke-intake pipe road on level-one spray column (3) top.
9. wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system according to claim 8, which is characterized in that
Drainage pipeline below the level-one spray column (3) is connect with sedimentation basin (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721560656.4U CN207922266U (en) | 2017-11-20 | 2017-11-20 | Wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721560656.4U CN207922266U (en) | 2017-11-20 | 2017-11-20 | Wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207922266U true CN207922266U (en) | 2018-09-28 |
Family
ID=63612208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721560656.4U Expired - Fee Related CN207922266U (en) | 2017-11-20 | 2017-11-20 | Wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207922266U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595580A (en) * | 2018-12-06 | 2019-04-09 | 北京热科能源技术研究有限公司 | A kind of flue gas heat recovery system |
| CN109731431A (en) * | 2019-02-28 | 2019-05-10 | 西安热工研究院有限公司 | A kind of coal steam-electric plant smoke takes off white system and method |
| CN111389178A (en) * | 2020-02-28 | 2020-07-10 | 福州新福兴浮法玻璃有限公司 | Float glass tin bath waste gas adsorption purification treatment recovery unit |
| CN111457410A (en) * | 2020-03-30 | 2020-07-28 | 国电龙源电力技术工程有限责任公司 | System for eliminating smoke plume and flue gas waste heat utilization |
| CN115090072A (en) * | 2022-06-10 | 2022-09-23 | 光大环境科技（中国）有限公司 | Energy-saving and water-saving flue gas treatment device and method |
-
2017
- 2017-11-20 CN CN201721560656.4U patent/CN207922266U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595580A (en) * | 2018-12-06 | 2019-04-09 | 北京热科能源技术研究有限公司 | A kind of flue gas heat recovery system |
| CN109595580B (en) * | 2018-12-06 | 2020-04-17 | 北京热科能源技术研究有限公司 | Flue gas heat recovery system |
| CN109731431A (en) * | 2019-02-28 | 2019-05-10 | 西安热工研究院有限公司 | A kind of coal steam-electric plant smoke takes off white system and method |
| CN111389178A (en) * | 2020-02-28 | 2020-07-10 | 福州新福兴浮法玻璃有限公司 | Float glass tin bath waste gas adsorption purification treatment recovery unit |
| CN111457410A (en) * | 2020-03-30 | 2020-07-28 | 国电龙源电力技术工程有限责任公司 | System for eliminating smoke plume and flue gas waste heat utilization |
| CN115090072A (en) * | 2022-06-10 | 2022-09-23 | 光大环境科技（中国）有限公司 | Energy-saving and water-saving flue gas treatment device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207922266U (en) | Wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system | |
| CN109045953B (en) | Flue gas cooling, condensing, dehumidifying, decontaminating, reheating and whitening system and method | |
| CN107781832A (en) | Wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system and method | |
| CN107860153B (en) | Energy-saving water-saving coal-fired boiler wet flue gas deep comprehensive treatment system and method | |
| CN208553608U (en) | A kind of deep temperature reduction condensation eliminating white smoke device | |
| CN110559804B (en) | Flue gas desulfurization and regeneration integrated tower and flue gas desulfurization method | |
| CN107261699A (en) | A kind of apparatus and method of the ultra-clean dedusting eliminating white smoke of desulfurization fume | |
| CN106369623A (en) | System for removing smoke plumes through condensation, emission reduction, water collecting, heating and drying | |
| CN207379110U (en) | A kind of energy-saving and water-saving type coal-burning boiler wet flue gas depth total system | |
| CN109237505A (en) | The device and its working method that water disappears white are received in a kind of classification waste heat recycling condensation of flue gas | |
| CN209034070U (en) | A kind of cooling dehumidification by condensation decontamination reheating of flue gas disappears white system | |
| CN105536484B (en) | A kind of pollutant pre-corrosion tower based on flue gas condensing | |
| CN109974062A (en) | A kind of fume afterheat depth recovery system using absorption heat pump and two-stage heat exchanger | |
| CN108554157A (en) | A kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle | |
| CN103353120A (en) | System for recycling afterheat and condensed water of desulfurized tail flue gas | |
| CN203384997U (en) | Recycling system for waste heat and condensates of desulfurization tail flue gas | |
| CN205170902U (en) | Converter coal gas dry cleaning recovery system | |
| CN208742284U (en) | A kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle | |
| CN205948591U (en) | System is got rid of to coal -fired flue gas deep purification plume | |
| CN109772106A (en) | A kind of flue gas takes off white water saving fixtures | |
| CN206980436U (en) | A kind of eddy flow phase transformation sieving flue gas desulfurization complementary energy reclaims integrated reactor | |
| CN209828704U (en) | Boiler flue gas can condense particulate matter and get rid of heat recovery system in coordination | |
| CN209524531U (en) | A kind of system of coal-fired flue-gas minimum discharge collaboration UTILIZATION OF VESIDUAL HEAT IN | |
| CN208916852U (en) | The Zero emission device that concentration is evaporated waste water is evaporated using boiler smoke waste heat | |
| CN105964405A (en) | Device and method for promoting wet-type electrostatic precipitator to remove PM2.5 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180928 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |