CN109248552A - White integral system and method are taken off for desulfurizing industrial fume - Google Patents
White integral system and method are taken off for desulfurizing industrial fume Download PDFInfo
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- CN109248552A CN109248552A CN201810997335.3A CN201810997335A CN109248552A CN 109248552 A CN109248552 A CN 109248552A CN 201810997335 A CN201810997335 A CN 201810997335A CN 109248552 A CN109248552 A CN 109248552A
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- Prior art keywords
- flue gas
- heat
- white
- smoke
- industrial
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- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 64
- 239000003517 fume Substances 0.000 title claims abstract description 41
- 239000000779 smoke Substances 0.000 claims abstract description 167
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 150
- 239000003546 flue gas Substances 0.000 claims abstract description 150
- 239000007788 liquid Substances 0.000 claims abstract description 112
- 239000007789 gas Substances 0.000 claims abstract description 59
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 230000001172 regenerating effect Effects 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 87
- 239000003795 chemical substances by application Substances 0.000 claims description 44
- 238000006477 desulfuration reaction Methods 0.000 claims description 44
- 230000023556 desulfurization Effects 0.000 claims description 44
- 239000006096 absorbing agent Substances 0.000 claims description 36
- 239000012530 fluid Substances 0.000 claims description 27
- 235000019504 cigarettes Nutrition 0.000 claims description 26
- 239000007921 spray Substances 0.000 claims description 20
- 239000002826 coolant Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000012546 transfer Methods 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 8
- 239000001110 calcium chloride Substances 0.000 claims description 7
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 7
- 238000010790 dilution Methods 0.000 claims description 7
- 239000012895 dilution Substances 0.000 claims description 7
- 230000008929 regeneration Effects 0.000 claims description 7
- 238000011069 regeneration method Methods 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 238000001802 infusion Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 235000014171 carbonated beverage Nutrition 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 6
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 21
- 230000000694 effects Effects 0.000 description 21
- 239000000428 dust Substances 0.000 description 20
- 238000010586 diagram Methods 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 2
- 238000005213 imbibition Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000008234 soft water Substances 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- MXWHMTNPTTVWDM-NXOFHUPFSA-N mitoguazone Chemical compound NC(N)=N\N=C(/C)\C=N\N=C(N)N MXWHMTNPTTVWDM-NXOFHUPFSA-N 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/343—Heat recovery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention, which discloses, a kind of takes off white integral system and method for desulfurizing industrial fume.The integral system includes desulfurizing tower, takes off white unit and flue gas heat converter；Desulfurizing tower is equipped with the first smoke inlet and the first exhanst gas outlet, takes off white unit equipped with the second smoke inlet and the second exhanst gas outlet；Flue gas heat converter again send industrial smoke to the first smoke inlet after being used to for the heat dividing wall type of the industrial smoke in industrial smoke conveyance conduit being transferred to the dry flue gas of the second exhanst gas outlet discharge；First exhanst gas outlet is connected to the second smoke inlet；White unit is taken off equipped with first circulation circuit and second circulation circuit；First circulation circuit is equipped with regenerating unit；Second circulation circuit is equipped with self circulation heat exchange device；The pattern of self circulation heat exchange device is dividing wall type heat exchanger, and its cooling for being used to flow through absorbing liquid therein.The integral system and method, thermal energy consumption is small, can reduce the dew point of exiting flue gas.
Description
Technical field
White integral system and method are taken off for desulfurizing industrial fume the present invention relates to a kind of.
Background technique
Currently, industrial smoke mainly has direct emission and discharges two kinds of forms again after wet desulphurization.The work of direct emission
Industry flue gas, temperature is high, humidity is low, is able to maintain the drying of chimney, thus chimney is not caused significantly to corrode, however it is this
Nitrogen, sulfur oxide content are high in flue gas, and environmental pollution is larger.
However, the wet desulphurization of industrial smoke can also to introduce in flue gas a large amount of although sulfide can be removed
Vapor.Since the pollutant in industrial smoke can not remove completely, therefore form the Low Temperature Wet white cigarette containing pollutant.This low temperature
Wet white cigarette easily condenses in inner wall of stack, forms the acid solution of strong corrosive, causes serious corrosion to inner wall of stack.Together
When, since temperature is low, nitrogen, the sulfur oxide contained in flue gas is difficult to spread, cumulative, the dirt caused by surrounding enviroment
Dye.Flue gas is because temperature reduces during throat is discharged into atmosphere, and part vapourous water and pollutant can coagulate in flue gas,
Misty steam is formed in throat, because of the reasons such as sky background color and skylight photograph, viewing angle color can occur for misty steam
Slight change, formed " coloured plume ", usually the colors such as white, canescence or blue.
MGGH system disclosed in Chinese patent application CN201610587174.1 is currently widely used for desulfurization cigarette
The white system that disappears of gas adds gas cooler in desulfurization front end, and smoke re-heater is added after desulfurization.In the system, flue gas is in cigarette
It can occur to condense indirect heat exchange in Gas Cooler, (direct contact heat transfer) opposite with sink temperature end difference is larger, in flue gas reheat
Relatively high dry-bulb temperature need be heated in device again, therefore heat source consumption is big；Condensation of the flue gas in gas cooler is usual
Pipe indirect condensing is moulded using fluorine, investment cost is high, and the flue gas section resistance from desulfurizing tower to chimney breast is big, and flue gas condensed water index is super
Mark, is not achieved recycling standard.
The white system that disappears disclosed in Chinese patent application CN201720168606.5 is currently widely used for desulfurization cigarette
The white system that disappears of gas adds flue gas cool-down heat exchanger in desulfurization front end, and flue gas temperature rise heat exchanger is added after desulfurization.The system is only
The dry-bulb temperature for improving exiting flue gas, dew point do not reduce substantially, still have a large amount of vapor in flue gas, ambient temperature compared with
It cannot achieve de- white effect for 10 DEG C or less when low.
It can be seen that the method that above two process system uses is to utilize steam or cigarette using flue gas heater
Gas reaches certain temperature to the flue gas after desulfurization, it is made to be difficult to condense, but this method energy consumption is very big, very without
Ji, will cause the significant wastage of energy.
Summary of the invention
The technical problem to be solved by the present invention is in order to overcome in the prior art industrial smoke passed through again after wet desulphurization
Tradition takes off white dehumidifying, and energy consumption is high, can not reduce the defect of exiting flue gas dew point, and provides a kind of novel for industrial smoke
Desulfurization takes off white integral system and method.The integral system and method, using the direct Absorption Desulfurization of the absorbing liquid of water imbibition
Moisture in flue gas afterwards can play the role of removing a large amount of condensates in industrial smoke, and dehydration efficiency is high, can be significantly reduced de-
The dew point of white machine set outlet flue gas.The integral system and method, make full use of industrial smoke latent heat of the steam, and additional thermal energy disappears
It consumes small, invests small, and the flue gas heat rate of recovery is higher.The integral system and method, can directly recycle to obtain being capable of direct benefit
Soft water.
The present invention solves above-mentioned technical problem by the following technical programs:
The present invention provide it is a kind of white integral system is taken off for desulfurizing industrial fume, the integral system includes desulfurization
Tower takes off white unit and flue gas heat converter；The desulfurizing tower be equipped with the first smoke inlet and the first exhanst gas outlet, it is described take off it is white
Unit is equipped with the second smoke inlet and the second exhanst gas outlet；The flue gas heat converter is used for will be in industrial smoke conveyance conduit
Industrial smoke heat dividing wall type be transferred to the dry flue gas of second exhanst gas outlet discharge after the industrial smoke is given again
To first smoke inlet；First exhanst gas outlet is connected to second smoke inlet；
It is described to take off white unit equipped with first circulation circuit and second circulation circuit；The first circulation circuit is equipped with regeneration
Device, the regenerating unit are used to flow through the regeneration of the absorbing liquid after water suction therein；The second circulation circuit is equipped with certainly
Circulation heat exchanger；The pattern of the self circulation heat exchange device is dividing wall type heat exchanger, and it is used to flow through the cold of absorbing liquid therein
But.
In above-mentioned integral system, the desulfurizing tower can be desulfurizing tower in the prior art, be used for the industrial smoke
Contact with desulfurizing agent, and the sulphur-containing substance in the industrial smoke is removed.
In above-mentioned integral system, first smoke inlet can be routinely set to the bottom of the desulfurizing tower by this field.
In above-mentioned integral system, first exhanst gas outlet can be routinely set to the top of the desulfurizing tower by this field.
It is described to take off the absorption tower that white unit be routine in the prior art in above-mentioned integral system, after being used for desulfurization
Contact of the flue gas with absorbing liquid, the absorbing liquid after obtaining dry flue gas and water suction.For example, described take off in white unit by this field routine
Equipped with spray tube, filler device, demister and deflector, the filler device is set to the middle part for taking off white unit, described
Spray tube is set to the top of the filler device, and the demister is set to above the spray tube, the second circulation circuit
Entrance be connected to the spray tube.
In above-mentioned integral system, second smoke inlet can routinely be set to the bottom for taking off white unit by this field
Portion.
In above-mentioned integral system, second exhanst gas outlet can routinely be set to the top for taking off white unit by this field
Portion.
In above-mentioned integral system, preferably, the flue gas heat converter is reheater, the pattern of the reheater is
Dividing wall type heat exchanger, the industrial smoke conveyance conduit successively with the fluid channel of the reheater and first smoke inlet
Connection.More preferably, the industrial smoke conveyance conduit is also connected to first smoke inlet, and the industrial smoke delivery pipe
Road is equipped with the cigarette valve for adjusting the industrial smoke flow into the zone of heat liberation of the reheater.It is using the integration
System can preferably control the flow into the industrial smoke of the reheater, so that preferably control drains into the flue gas of atmosphere
Temperature.
In above-mentioned integral system, preferably, the flue gas heat converter is made of gas cooler and reheater, institute
The pattern for stating gas cooler and the reheater is dividing wall type heat exchanger, the cold fluid pass of the gas cooler and institute
The zone of heat liberation for stating reheater is connected to form cooling medium circuit, and the cooling medium circuit is equipped with delivery pump, the work
Industry smoke conveying duct is successively connected to the zone of heat liberation of the gas cooler and first smoke inlet.Using this one
Body system can save space occupied, and reduce the hidden danger of leaking out of industrial smoke.
Wherein, preferably, the cooling medium circuit is chilled(cooling) water return (CWR).More preferably, it is set on the cooling medium circuit
There is water tank.
In above-mentioned integral system, preferably, the flue gas heat converter is made of condenser and reheater, it is described again
The pattern of hot device is dividing wall type heat exchanger, and the condenser is equipped with third smoke inlet, third exhanst gas outlet, overflow port and condensation
Liquid outlet, the condenser is interior to be equipped with spray tube；The condensate outlet successively with the zone of heat liberation of the reheater and institute
State spray tube connection；The industrial smoke conveyance conduit is connected to the third smoke inlet, the third exhanst gas outlet and institute
State the connection of the first smoke inlet；The pipeline that the condensate outlet is connected to the zone of heat liberation of the reheater is equipped with infusion
Pump.
Wherein, the condenser is contacted for industrial smoke with the intermediate medium sprayed into from the spray tube, and then is obtained
Condensate liquid and flue gas after cooling.
Wherein, the intermediate medium is water, ethylene glycol or conventional use of with hygroscopic inorganic salts in the prior art
Solution.
In above-mentioned integral system, it will be apparent to a skilled person that the first circulation circuit is used for institute
It will be inhaled again after stating the moisture removal in the flue gas after the absorbing liquid after taking off the water suction in white unit draws the desulfurization that will wherein absorb
It receives liquid and is sent into described take off in white unit.
In above-mentioned integral system, preferably, the integral system is equipped with the external circulation heat exchanging device of dividing wall type, it is described de-
White unit be equipped with it is that the lower part for taking off white unit from described is drawn, successively with the cold fluid pass of the external circulation heat exchanging device, described
Regenerating unit is connected to the zone of heat liberation of the external circulation heat exchanging device, returns again to described and takes off described the first of white unit lower part
Circulation loop.More preferably, the regenerating unit is made of evaporator and steam-water separator, and the evaporator enters equipped with dilution
Mouth, steam outlet and concentrated solution outlet；The cold fluid pass of the external circulation heat exchanging device is connected to the dilution entrance, institute
It states concentrated solution outlet to be connected to the zone of heat liberation of the external circulation heat exchanging device, the steam outlet and the steam-water separator
Connection.
Wherein, the driving heat source of the evaporator, can be gas driven, can be a high-temperature steam driving, can also
To be electrothermal drive.
Wherein, the steam-water separator is routinely equipped with secondary steam outlet and condensate outlet by this field.
Wherein, preferably, the integral system is additionally provided with vapor-water heat exchanger, cold source enters pipe and cold source outlet, institute
The pattern for stating vapor-water heat exchanger is dividing wall type heat exchanger；The hot fluid pipeline of the secondary steam outlet and the vapor-water heat exchanger
Connection, the cold source inlet tube successively cold fluid with the cold fluid pass of the self circulation heat exchange device, the vapor-water heat exchanger
Channel is connected to the cold source outlet.
Wherein, preferably, the integral system is additionally provided with flue gas auxiliary heater, the flue gas auxiliary heater is used for
Dividing wall type heats the dry flue gas drawn from the flue gas heat converter, and the secondary steam outlet is heated with flue gas auxiliary
The zone of heat liberation of device is connected to.Using the integral system, the dry-bulb temperature for draining into the dry flue gas of atmosphere can be further increased,
To preferably control de- white effect.
In above-mentioned integral system, it will be apparent to a skilled person that the second circulation circuit is used for institute
It states the absorbing liquid extraction taken off in white unit and absorbing liquid is sent into described take off in white unit again after wall-type heat exchange is cooling.
In above-mentioned integral system, preferably, the integral system is additionally provided with air cooling tower, the air cooling tower is equipped with cooling supply
The cooling duct of air disengaging, the cold fluid pass of the self circulation heat exchange device are connected to shape with the zone of heat liberation of the air cooling tower
At heat transfer loop, the heat transfer loop is used for the heat transfer of absorbing liquid in the second circulation circuit to the cooling duct
In cold air.When the external world is without available cold source medium, cooled down using air cooling tower to absorbing liquid, and the temperature of absorbing liquid
Degree is lower, and moisture pick-up properties is stronger, to improve the hygroscopicity effect of the integral system.
White method is taken off for desulfurizing industrial fume the present invention also provides a kind of, the method uses and is previously described for industry
Flue gas desulfurization takes off white integral system, and described method includes following steps:
(1) industrial smoke in the industrial smoke conveyance conduit passes heat dividing wall type through the flue gas heat heat exchanger
It is handed to after the dry flue gas that second exhanst gas outlet is drawn, then enters in the desulfurizing tower through first smoke inlet, institute
Industrial smoke and desulfurization agent are stated, the flue gas after obtaining sulfur-bearing absorbing liquid and desulfurization；
(2) flue gas after the desulfurization is discharged through first exhanst gas outlet and through described in second smoke inlet entrance
It takes off in white unit, the flue gas after the desulfurization is contacted with the absorbing liquid being sent into from the second circulation circuit, obtains dry flue gas and suction
Absorbing liquid after water, the dry flue gas are discharged from second exhanst gas outlet and heat through the flue gas heat heat exchanger dividing wall type
After be discharged, the absorbing liquid after the water suction through the regenerating unit regeneration after be back to described take off in white unit；In the absorption
During liquid absorbs water, the heat for flowing through the absorbing liquid in the second circulation circuit is removed and is made by the self circulation heat exchange device
The temperature that the absorbing liquid for taking off white unit must be sent into is 27-40 DEG C；
Wherein, in step (2), the quality for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through the second circulation circuit
Than for 1:20-1:50, the desulfurizing agent is Ca (OH)2, the water absorbing agent is CaCl2Or LiBr.
In step (1), the temperature of the industrial smoke is generally 90 DEG C -150 DEG C.
In step (1), preferably, the temperature of the industrial smoke entered through first smoke inlet is 60 DEG C -90 DEG C.
In step (1), the desulfurizing agent can be to be in the prior art for removing the desulfurization of sulphur-containing substance in industrial smoke
Agent may be, for example, the Ca (OH) that mass fraction is 45%2Solution.
In step (2), particular kind of absorbing liquid has strong absorptive, and moderate boiling point, viscosity is small, and corrosivity is low, is easy
Regenerated characteristic.
In step (2), preferably, being sent into the temperature of the absorbing liquid for taking off white unit for example through the second circulation circuit
It can be 36 DEG C.
In step (2), the mass ratio for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through the second circulation circuit
It such as can be 1:30 or 1:40.
In step (2), preferably, the matter of desulfurizing agent and water absorbing agent in the absorbing liquid being sent into through the second circulation circuit
Amount score is 30%-40%.
In step (2), preferably, being inhaled in the flow of absorbing liquid and the second circulation circuit in the first circulation circuit
The ratio for receiving the flow of liquid is 0.3-0.4.
In step (2), preferably, the dew point of the dry flue gas is 30 DEG C -45 DEG C；It is heated through the flue gas heat heat exchanger
The dry-bulb temperature of dry flue gas afterwards is 60-80 DEG C.
In the above method, preferably, the flow of the industrial smoke and the absorbing liquid being sent into through the second circulation circuit
Flow ratio be 330-420, wherein the unit of the flow of the industrial smoke be Nm3/ h, through the second circulation circuit
The unit of the flow of the absorbing liquid of feeding is m3/h。
In a better embodiment of the invention, the flow of the industrial smoke is 250000Nm3/ h, the first circulation
The flow in circuit is 200m3/ h, the flow in the second circulation circuit are 600m3/ h, the suction being sent into through the second circulation circuit
The mass fraction for receiving desulfurizing agent and water absorbing agent in liquid is 35%, is sent into the suction for taking off white unit through the second circulation circuit
The temperature for receiving liquid is 40 DEG C.
In a better embodiment of the invention, the flow of the industrial smoke is 100000Nm3/ h, the first circulation
The flow in circuit is 100m3/ h, the flow in the second circulation circuit are 300m3/ h, the suction being sent into through the second circulation circuit
The mass fraction for receiving desulfurizing agent and water absorbing agent in liquid is 35%, is sent into the suction for taking off white unit through the second circulation circuit
The temperature for receiving liquid is 27 DEG C.
In a better embodiment of the invention, the flow of the industrial smoke is 150000Nm3/ h, the first circulation
The flow in circuit is 130m3/ h, the flow in the second circulation circuit are 400m3/ h, the suction being sent into through the second circulation circuit
The mass fraction for receiving desulfurizing agent and water absorbing agent in liquid is 30%, is sent into the suction for taking off white unit through the second circulation circuit
The temperature for receiving liquid is 36 DEG C.
In a better embodiment of the invention, the flow of the industrial smoke is 250000Nm3/ h, the first circulation
The flow in circuit is 180m3/ h, the flow in the second circulation circuit are 500m3/ h, the suction being sent into through the second circulation circuit
The mass fraction for receiving desulfurizing agent and water absorbing agent in liquid is 40%, is sent into the suction for taking off white unit through the second circulation circuit
The temperature for receiving liquid is 40 DEG C.
In a better embodiment of the invention, the flow of the industrial smoke is 250000Nm3/ h, the first circulation
The flow in circuit is 100m3/ h, the flow in the second circulation circuit are 300m3/ h, the suction being sent into through the second circulation circuit
The mass fraction for receiving desulfurizing agent and water absorbing agent in liquid is 40%, is sent into the suction for taking off white unit through the second circulation circuit
The temperature for receiving liquid is 27 DEG C.
In a better embodiment of the invention, the flow of the industrial smoke is 250000Nm3/ h, the first circulation
The flow in circuit is 200m3/ h, the flow in the second circulation circuit are 600m3/ h, the suction being sent into through the second circulation circuit
The mass fraction for receiving desulfurizing agent and water absorbing agent in liquid is 35%, is sent into the suction for taking off white unit through the second circulation circuit
The temperature for receiving liquid is 40 DEG C.
In a better embodiment of the invention, the flow of the industrial smoke is 250000Nm3/ h, the first circulation
The flow in circuit is 110m3/ h, the flow in the second circulation circuit are 350m3/ h, the suction being sent into through the second circulation circuit
The mass fraction for receiving desulfurizing agent and water absorbing agent in liquid is 40%, is sent into the suction for taking off white unit through the second circulation circuit
The temperature for receiving liquid is 36 DEG C.
Without prejudice to the field on the basis of common sense, above-mentioned each optimum condition, can any combination to get the present invention it is each preferably
Example.
The reagents and materials used in the present invention are commercially available.
The positive effect of the present invention is that:
Integral system and method for the invention, solves that wet desulphurization exhaust gas temperature is lower, and moisture content is excessive, to cigarette
The technical issues of chimney seriously corroded generates a large amount of white cigarettes, causes the atmosphere pollutions such as " gypsum rain " and coloured misty rain.
Integral system and method for the invention is equipped with regenerator, first circulation circuit and second circulation circuit, can basis
The variations of the working characteristics and temperature condition of industrial smoke to be processed adjusts usage mode.
Integral system and method for the invention, equipment is simple, technologically advanced, stable, energy-saving and water-saving, can be simultaneously
Realize desulfurization, take off white, dedusting and waste heat recycling, desulfurization take off white effect it is good, low energy consumption, can high-efficiency low energy consumption to each in flue gas
Pollutant is purified.
Integral system and method for the invention, using the water in flue gas after the direct Absorption Desulfurization of the absorbing liquid of water imbibition
Point, it can play the role of removing a large amount of condensates in industrial smoke, dehydration efficiency is high, can be significantly reduced and takes off white machine set outlet cigarette
The dew point of gas.The integral system and method make full use of industrial smoke latent heat of the steam, and additional thermal energy consumption is small, and investment is small,
And the flue gas heat rate of recovery is higher.The integral system and method can directly recycle to obtain the soft water that can directly utilize.
Detailed description of the invention
Fig. 1 is the schematic diagram that white integral system is taken off for desulfurizing industrial fume of embodiment 1；
Fig. 2 is the schematic diagram that white integral system is taken off for desulfurizing industrial fume of embodiment 2；
Fig. 3 is the schematic diagram that white integral system is taken off for desulfurizing industrial fume of embodiment 3；
Fig. 4 is the schematic diagram that white integral system is taken off for desulfurizing industrial fume of embodiment 4；
Fig. 5 is the schematic diagram that white integral system is taken off for desulfurizing industrial fume of embodiment 5；
Fig. 6 is the schematic diagram that white integral system is taken off for desulfurizing industrial fume of embodiment 6；
Fig. 7 is the schematic diagram that white integral system is taken off for desulfurizing industrial fume of embodiment 7.
Description of symbols:
Industrial smoke conveyance conduit 10
Cigarette valve 11
Desulfurizing tower 20
First smoke inlet 21
First exhanst gas outlet 22
Take off white unit 30
Second smoke inlet 31
Second exhanst gas outlet 32
Reheater 40
Self circulation heat exchange device 50
External circulation heat exchanging device 60
Evaporator 70
Dilution entrance 71
Steam outlet 72
Concentrated solution outlet 73
Steam-water separator 80
Secondary steam outlet 81
Condensate outlet 82
Gas cooler 90
Water tank 100
Condenser 110
Vapor-water heat exchanger 120
Cold source enters pipe 130
Cold source outlet 140
Flue gas auxiliary heater 150
Air cooling tower 160
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.In the following examples, the experimental methods for specific conditions are not specified, according to conventional methods and conditions, or according to quotient
The selection of product specification.
Embodiment 1
(1) white integral system is taken off for desulfurizing industrial fume
As shown in Figure 1 takes off white integral system for desulfurizing industrial fume, and integral system has desulfurizing tower 20, takes off
White unit 30 and flue gas heat converter；Desulfurizing tower 20 is equipped with the first smoke inlet 21 and the first exhanst gas outlet 22, takes off white unit
30 are equipped with the second smoke inlet 31 and the second exhanst gas outlet 32；Flue gas heat converter is used for will be in industrial smoke conveyance conduit 10
Industrial smoke heat dividing wall type be transferred to the second exhanst gas outlet 32 discharge dry flue gas after industrial smoke is sent to first again
Smoke inlet 21；First exhanst gas outlet 22 is connected to the second smoke inlet 31；White unit 30 is taken off equipped with first circulation circuit and the
Two circulation loops；First circulation circuit is equipped with regenerating unit, and regenerating unit is for flowing through the absorbing liquid after water suction therein
Regeneration；Second circulation circuit is equipped with self circulation heat exchange device 50；The pattern of self circulation heat exchange device 50 is dividing wall type heat exchanger, and its
For flowing through the cooling of absorbing liquid therein.
Wherein, the first smoke inlet 21 is set to the bottom of desulfurizing tower 20；First exhanst gas outlet 22 is set to the top of desulfurizing tower 20
Portion.
Wherein, it takes off and is equipped with spray tube, filler device, demister and deflector in white unit 30, filler device is set to de-
The middle part of white unit 30, spray tube are set to the top of filler device, and demister is set to above spray tube, second circulation circuit
Entrance is connected to spray tube.
Wherein, the second smoke inlet 31 is set to the bottom for taking off white unit 30；Second exhanst gas outlet 32, which is set to, takes off white unit 30
Top.
Wherein, flue gas heat converter is reheater 40, and the pattern of reheater 40 is dividing wall type heat exchanger, and industrial smoke is defeated
Pipeline 10 is sent successively to be connected to the fluid channel of reheater 40 and the first smoke inlet 21.
Wherein, integral system is equipped with the external circulation heat exchanging device 60 of dividing wall type, takes off white unit 30 and is equipped with from taking off white unit 30
Lower part draw, the successively hot-fluid with the cold fluid pass of external circulation heat exchanging device 60, regenerating unit and external circulation heat exchanging device 60
The connection of body channel is returned again to the first circulation circuit for taking off white 30 lower part of unit；Regenerating unit is by evaporator 70 and steam-water separation
Device 80 forms, and evaporator 70 is equipped with dilution entrance 71, steam outlet 72 and concentrated solution outlet 73；External circulation heat exchanging device 60
Cold fluid pass is connected to dilution entrance 71, and concentrated solution outlet 73 is connected to the zone of heat liberation of external circulation heat exchanging device 60, water
Steam (vapor) outlet 72 is connected to steam-water separator 80.
Wherein, steam-water separator 80 is equipped with secondary steam outlet 81 and condensate outlet 82.
Wherein, integral system is additionally provided with vapor-water heat exchanger 120, cold source enters pipe 130 and cold source outlet 140, carbonated drink
The pattern of heat exchanger 120 is dividing wall type heat exchanger；Secondary steam outlet 81 is connected to the hot fluid pipeline of vapor-water heat exchanger 120,
Cold source inlet tube successively goes out with the cold fluid pass of self circulation heat exchange device 50, the cold fluid pass of vapor-water heat exchanger 120 and cold source
Mouth pipe 140 is connected to.
(2) using the method for above-mentioned integral system
This method comprises the following steps:
(1) industrial smoke in industrial smoke conveyance conduit 10 through flue gas heat heat exchanger by heat dividing wall type be transferred to from
Second exhanst gas outlet 32 draw dry flue gas after, then through the first smoke inlet 21 enter desulfurizing tower 20 in, industrial smoke and desulfurization
Agent (the Ca (OH) that mass fraction is 45%2Solution) contact, the flue gas after obtaining sulfur-bearing absorbing liquid and desulfurization；
(2) flue gas after desulfurization, which is discharged through the first exhanst gas outlet 22 and enters through the second smoke inlet 31, takes off white unit 30
In, the flue gas after desulfurization is contacted with the absorbing liquid being sent into from second circulation circuit, the absorbing liquid after obtaining dry flue gas and water suction, dry cigarette
Gas is discharged from the second exhanst gas outlet 32 and is discharged after the heating of flue gas heat heat exchanger dividing wall type, and the absorbing liquid after water suction is through regenerating
It is back to and is taken off in white unit 30 after device regeneration；During absorbing liquid water suction, the absorbing liquid in second circulation circuit is flowed through
Heat constantly removed by self circulation heat exchange device 50.
Wherein, in step (1), the flow of the industrial smoke in industrial smoke conveyance conduit 10 is 250000Nm3/ h, temperature
It is 140 DEG C；The temperature of the industrial smoke entered through the first smoke inlet 21 is 90 DEG C；The saturation cigarette that flue gas after desulfurization is 50 DEG C
Gas.
Wherein, in step (2), the flow of absorbing liquid is 200m in first circulation circuit3/h；Second circulation absorbs in circuit
The flow of liquid is 600m3/h；The mass ratio for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through second circulation circuit is 1:20,
Desulfurizing agent is Ca (OH)2, water absorbing agent CaCl2, the quality of desulfurizing agent and water absorbing agent in the absorbing liquid be sent into through second circulation circuit
Score is 35%；The temperature for the absorbing liquid being sent into through second circulation circuit is 40 DEG C；
Wherein, in step (2), the dew point of dry flue gas is 45 DEG C；Dry flue gas after the heating of flue gas heat heat exchanger it is dry
Ball temperature is 70 DEG C.
Effect data: the sulfide content of industrial smoke is 200mg/Nm in industrial smoke conveyance conduit 103, dust content
For 35mg/Nm3, sulfide content is 30mg/Nm in dry flue gas3, dust content 5mg/Nm3；Outside air temperature be -5 DEG C and with
When upper, integral system outlet is not in coloured plume.It can be seen that method of the invention, which can reach desulfurization, takes off white dedusting
Resultant effect.
Embodiment 2
(1) white integral system is taken off for desulfurizing industrial fume
As shown in Figure 2 takes off white integral system for desulfurizing industrial fume, and flue gas heat converter is cooled down by flue gas
Device 90 and reheater 40 form, and the pattern of gas cooler 90 and reheater 40 is dividing wall type heat exchanger, gas cooler 90
Cold fluid pass be connected to form cooling medium circuit with the zone of heat liberation of reheater 40, cooling medium circuit be equipped with conveying
Pump, industrial smoke conveyance conduit 10 are successively connected to the zone of heat liberation of gas cooler 90 and the first smoke inlet 21；Wherein,
Cooling medium circuit is chilled(cooling) water return (CWR), and cooling medium circuit is equipped with water tank 100；Except flue gas converting heat device and self-loopa are changed
The connection relationship of hot device 50 is different from the integral system of embodiment 1 outer, remaining is the same as the integral system of embodiment 1.
(2) using the method for above-mentioned integral system
This method is in addition to parameters described below, remaining method with embodiment 1.
Wherein, in step (1), the flow of the industrial smoke in industrial smoke conveyance conduit 10 is 100000Nm3/ h, temperature
It is 90 DEG C；The temperature of the industrial smoke entered through the first smoke inlet 21 is 60 DEG C；The saturation cigarette that flue gas after desulfurization is 50 DEG C
Gas.
Wherein, in step (2), the flow of absorbing liquid is 100m in first circulation circuit3/h；Second circulation absorbs in circuit
The flow of liquid is 300m3/h；The mass ratio for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through second circulation circuit is 1:50,
Desulfurizing agent is Ca (OH)2, water absorbing agent CaCl2, the quality of desulfurizing agent and water absorbing agent in the absorbing liquid be sent into through second circulation circuit
Score is 35%；The temperature for the absorbing liquid being sent into through second circulation circuit is 27 DEG C；
Wherein, in step (2), the dew point of dry flue gas is 30 DEG C；Dry flue gas after the heating of flue gas heat heat exchanger it is dry
Ball temperature is 60 DEG C.
Effect data: the sulfide content of industrial smoke is 200mg/Nm in industrial smoke conveyance conduit 103, dust content
For 35mg/Nm3, sulfide content is 30mg/Nm in dry flue gas3, dust content 5mg/Nm3；Outside air temperature be -5 DEG C and with
When upper, integral system outlet is not in coloured plume.It can be seen that method of the invention, which can reach desulfurization, takes off white dedusting
Resultant effect.
Embodiment 3
(1) white integral system is taken off for desulfurizing industrial fume
As shown in Figure 3 takes off white integral system for desulfurizing industrial fume, and flue gas heat converter is by condenser 110
It is formed with reheater 40, the pattern of reheater 40 is dividing wall type heat exchanger, and condenser 110 is equipped with third smoke inlet, third cigarette
Gas outlet, overflow port and condensate outlet, condenser 110 is interior to be equipped with spray tube；The condensate outlet successively heat with reheater 40
Fluid channel is connected to spray tube；Industrial smoke conveyance conduit 10 is connected to third smoke inlet, third exhanst gas outlet and first
Smoke inlet 21 is connected to；The pipeline that condensate outlet is connected to the zone of heat liberation of reheater 40 is equipped with infusion pump；Wherein, cold
Condenser 110 is contacted for industrial smoke with the intermediate medium sprayed into from spray tube, and then obtains condensate liquid and flue gas after cooling；
Wherein, intermediate medium is ethylene glycol；Except the connection relationship of flue gas converting heat device and self circulation heat exchange device 50 and the one of embodiment 1
Body system is different outer, remaining is the same as the integral system of embodiment 1.
(2) using the method for above-mentioned integral system
This method is in addition to parameters described below, remaining method with embodiment 1.
Wherein, in step (1), the flow of the industrial smoke in industrial smoke conveyance conduit 10 is 150000Nm3/ h, temperature
It is 150 DEG C；The temperature of the industrial smoke entered through the first smoke inlet 21 is 90 DEG C；The saturation cigarette that flue gas after desulfurization is 50 DEG C
Gas.
Wherein, in step (2), the flow of absorbing liquid is 130m in first circulation circuit3/h；Second circulation absorbs in circuit
The flow of liquid is 400m3/h；The mass ratio for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through second circulation circuit is 1:30,
Desulfurizing agent is Ca (OH)2, water absorbing agent CaCl2, the quality of desulfurizing agent and water absorbing agent in the absorbing liquid be sent into through second circulation circuit
Score is 30%；The temperature for the absorbing liquid being sent into through second circulation circuit is 36 DEG C；
Wherein, in step (2), the dew point of dry flue gas is 40 DEG C；Dry flue gas after the heating of flue gas heat heat exchanger it is dry
Ball temperature is 80 DEG C.
Effect data: the sulfide content of industrial smoke is 200mg/Nm in industrial smoke conveyance conduit 103, dust content
For 35mg/Nm3, sulfide content is 35mg/Nm in dry flue gas3, dust content 5mg/Nm3；Outside air temperature be -5 DEG C and with
When upper, integral system outlet is not in coloured plume.It can be seen that method of the invention, which can reach desulfurization, takes off white dedusting
Resultant effect.
Embodiment 4
(1) white integral system is taken off for desulfurizing industrial fume
As shown in Figure 4 to take off white integral system for desulfurizing industrial fume, industrial smoke conveyance conduit 10 is also with the
The connection of one smoke inlet 21, and industrial smoke conveyance conduit 10 is equipped with for adjusting into the zone of heat liberation of reheater 40
The cigarette valve 11 of industrial smoke flow；Except above-mentioned connection relationship and the connection relationship of self circulation heat exchange device 50 and the one of embodiment 1
Body system is different outer, remaining is the same as the integral system of embodiment 1.
(2) using the method for above-mentioned integral system
This method is in addition to parameters described below, remaining method with embodiment 1.
Wherein, in step (1), the flow of the industrial smoke in industrial smoke conveyance conduit 10 is 200000Nm3/ h, temperature
It is 120 DEG C；The temperature of the industrial smoke entered through the first smoke inlet 21 is 75 DEG C；The saturation cigarette that flue gas after desulfurization is 50 DEG C
Gas.
Wherein, in step (2), the flow of absorbing liquid is 180m in first circulation circuit3/h；Second circulation absorbs in circuit
The flow of liquid is 500m3/h；The mass ratio for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through second circulation circuit is 1:40,
Desulfurizing agent is Ca (OH)2, water absorbing agent LiBr, the quality of desulfurizing agent and water absorbing agent in the absorbing liquid being sent into through second circulation circuit
Score is 40%；The temperature for the absorbing liquid being sent into through second circulation circuit is 40 DEG C；
Wherein, in step (2), the dew point of dry flue gas is 45 DEG C；Dry flue gas after the heating of flue gas heat heat exchanger it is dry
Ball temperature is 70 DEG C.
Effect data: the sulfide content of industrial smoke is 200mg/Nm in industrial smoke conveyance conduit 103, dust content
For 35mg/Nm3, sulfide content is 35mg/Nm in dry flue gas3, dust content 10mg/Nm3；Outside air temperature be -5 DEG C and
When above, integral system outlet is not in coloured plume.It can be seen that method of the invention, which can reach desulfurization, takes off white remove
The resultant effect of dirt.
Embodiment 5
(1) white integral system is taken off for desulfurizing industrial fume
As shown in Figure 5 takes off white integral system for desulfurizing industrial fume, and integral system is additionally provided with flue gas auxiliary
Heater 150, flue gas auxiliary heater 150 heat the dry flue gas drawn from flue gas heat converter, secondary steaming for dividing wall type
Vapor outlet 81 is connected to the zone of heat liberation of flue gas auxiliary heater 150；Except above-mentioned connection relationship and self circulation heat exchange device 50
Connection relationship it is different from the integral system of embodiment 1 outer, remaining is the same as the integral system of embodiment 1.
(2) using the method for above-mentioned integral system
This method is in addition to parameters described below, remaining method with embodiment 1.
Wherein, in step (1), the flow of the industrial smoke in industrial smoke conveyance conduit 10 is 100000Nm3/ h, temperature
It is 90 DEG C；The temperature of the industrial smoke entered through the first smoke inlet 21 is 60 DEG C；The saturation cigarette that flue gas after desulfurization is 46 DEG C
Gas.
Wherein, in step (2), the flow of absorbing liquid is 100m in first circulation circuit3/h；Second circulation absorbs in circuit
The flow of liquid is 300m3/h；The mass ratio for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through second circulation circuit is 1:50,
Desulfurizing agent is Ca (OH)2, water absorbing agent LiBr, the quality of desulfurizing agent and water absorbing agent in the absorbing liquid being sent into through second circulation circuit
Score is 40%；The temperature for the absorbing liquid being sent into through second circulation circuit is 27 DEG C；
Wherein, in step (2), the dew point of dry flue gas is 30 DEG C；Dry flue gas after the heating of flue gas heat heat exchanger it is dry
Ball temperature is 60 DEG C.
Effect data: the sulfide content of industrial smoke is 200mg/Nm in industrial smoke conveyance conduit 103, dust content
For 35mg/Nm3, sulfide content is 30mg/Nm in dry flue gas3, dust content 5mg/Nm3；Outside air temperature be -5 DEG C and with
When upper, integral system outlet is not in coloured plume.It can be seen that method of the invention, which can reach desulfurization, takes off white dedusting
Resultant effect.
Embodiment 6
(1) white integral system is taken off for desulfurizing industrial fume
As shown in FIG. 6 to take off white integral system for desulfurizing industrial fume, integral system is additionally provided with flue gas auxiliary
Heater 150, flue gas auxiliary heater 150 heat the dry flue gas drawn from flue gas heat converter, secondary steaming for dividing wall type
Vapor outlet 81 is connected to the zone of heat liberation of flue gas auxiliary heater 150；In addition to above-mentioned connection relationship, remaining is the same as embodiment 2
Integral system.
(2) using the method for above-mentioned integral system
This method is in addition to parameters described below, remaining method with embodiment 1.
Wherein, in step (1), the flow of the industrial smoke in industrial smoke conveyance conduit 10 is 250000Nm3/ h, temperature
It is 140 DEG C；The temperature of the industrial smoke entered through the first smoke inlet 21 is 90 DEG C；The saturation cigarette that flue gas after desulfurization is 50 DEG C
Gas.
Wherein, in step (2), the flow of absorbing liquid is 200m in first circulation circuit3/h；Second circulation absorbs in circuit
The flow of liquid is 600m3/h；The mass ratio for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through second circulation circuit is 1:20,
Desulfurizing agent is Ca (OH)2, water absorbing agent CaCl2, the quality of desulfurizing agent and water absorbing agent in the absorbing liquid be sent into through second circulation circuit
Score is 35%；The temperature for the absorbing liquid being sent into through second circulation circuit is 40 DEG C；
Wherein, in step (2), the dew point of dry flue gas is 45 DEG C；Dry flue gas after the heating of flue gas heat heat exchanger it is dry
Ball temperature is 70 DEG C.
Effect data: the sulfide content of industrial smoke is 200mg/Nm in industrial smoke conveyance conduit 103, dust content
For 35mg/Nm3, sulfide content is 30mg/Nm in dry flue gas3, dust content 5mg/Nm3；Outside air temperature be -5 DEG C and with
When upper, integral system outlet is not in coloured plume.It can be seen that method of the invention, which can reach desulfurization, takes off white dedusting
Resultant effect.
Embodiment 7
(1) white integral system is taken off for desulfurizing industrial fume
As shown in Figure 7 takes off white integral system for desulfurizing industrial fume, and integral system is additionally provided with air cooling tower
160, air cooling tower 160 is equipped with the cooling duct passed in and out for cold air, the cold fluid pass and air cooling tower 160 of self circulation heat exchange device 50
Zone of heat liberation be connected to form heat transfer loop, heat transfer loop is used for the heat transfer of absorbing liquid in second circulation circuit to cold
But the cold air in channel；In addition to above-mentioned connection relationship, remaining is the same as the integral system of embodiment 2.
(2) using the method for above-mentioned integral system
This method is in addition to parameters described below, remaining method with embodiment 1.
Wherein, in step (1), the flow of the industrial smoke in industrial smoke conveyance conduit 10 is 125000Nm3/ h, temperature
It is 150 DEG C；The temperature of the industrial smoke entered through the first smoke inlet 21 is 90 DEG C；The saturation cigarette that flue gas after desulfurization is 42 DEG C
Gas.
Wherein, in step (2), the flow of absorbing liquid is 110m in first circulation circuit3/h；Second circulation absorbs in circuit
The flow of liquid is 350m3/h；The mass ratio for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through second circulation circuit is 1:30,
Desulfurizing agent is Ca (OH)2, water absorbing agent CaCl2, the quality of desulfurizing agent and water absorbing agent in the absorbing liquid be sent into through second circulation circuit
Score is 40%；The temperature for the absorbing liquid being sent into through second circulation circuit is 36 DEG C；
Wherein, in step (2), the dew point of dry flue gas is 40 DEG C；Dry flue gas after the heating of flue gas heat heat exchanger it is dry
Ball temperature is 80 DEG C.
Effect data: the sulfide content of industrial smoke is 200mg/Nm in industrial smoke conveyance conduit 103, dust content
For 35mg/Nm3, sulfide content is 30mg/Nm in dry flue gas3, dust content 5mg/Nm3；Outside air temperature be -5 DEG C and with
When upper, integral system outlet is not in coloured plume.It can be seen that method of the invention, which can reach desulfurization, takes off white dedusting
Resultant effect.
Comparative example 1
(1) white integral system is taken off for desulfurizing industrial fume
With the integral system of embodiment 1.
(2) using the method for above-mentioned integral system
This method is in addition to parameters described below, remaining method with embodiment 1.
Wherein, in step (2), the mass ratio for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through second circulation circuit is
1:10；
Wherein, in step (2), the dew point of dry flue gas is 46 DEG C；Dry flue gas after the heating of flue gas heat heat exchanger it is dry
Ball temperature is 70 DEG C.
Effect data: the sulfide content of industrial smoke is 200mg/Nm in industrial smoke conveyance conduit 103, dust content
For 35mg/Nm3, sulfide content is 30mg/Nm in dry flue gas3, dust content 6mg/Nm3；One under 0 DEG C of outside air temperature
Body system outlet has white cigarette, and integrated system outlet is without white cigarette under 2 DEG C or more of outside air temperature.
Comparative example 2
(1) white integral system is taken off for desulfurizing industrial fume
With the integral system of embodiment 1.
(2) using the method for above-mentioned integral system
This method is in addition to parameters described below, remaining method with embodiment 1.
Wherein, in step (2), the mass ratio for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through second circulation circuit is
1:80。
Effect data: the sulfide content of industrial smoke is 200mg/Nm in industrial smoke conveyance conduit 103, dust content
For 35mg/Nm3, sulfide content is 35mg/Nm in dry flue gas3, dust content 6mg/Nm3；When outside air temperature is 0 DEG C, one
Body system outlet is not in coloured plume；When outside air temperature is 0 DEG C or less, integral system outlet will appear coloured cigarette
Plumage.
Comparative example 3
(1) white integral system is taken off for desulfurizing industrial fume
With the integral system of embodiment 1.
(2) using the method for above-mentioned integral system
This method is in addition to parameters described below, remaining method with embodiment 1.
Wherein, in step (2), the desulfurizing agent in absorbing liquid be sent into through second circulation circuit is CaO and NaOH, and the two
Substance amount ratio be 1:1, the dehydrating agent in absorbing liquid being sent into through second circulation circuit be NaCl.
Effect data: the sulfide content of industrial smoke is 200mg/Nm in industrial smoke conveyance conduit 103, dust content
For 35mg/Nm3, sulfide content is 35mg/Nm in dry flue gas3, dust content 5mg/Nm3；When outside air temperature is 0 DEG C, one
Body system outlet is not in coloured plume；When outside air temperature is 0 DEG C or less, integral system outlet will appear coloured cigarette
Plumage.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (10)
1. a kind of take off white integral system for desulfurizing industrial fume, which is characterized in that the integral system includes desulfurization
Tower takes off white unit and flue gas heat converter；The desulfurizing tower be equipped with the first smoke inlet and the first exhanst gas outlet, it is described take off it is white
Unit is equipped with the second smoke inlet and the second exhanst gas outlet；The flue gas heat converter is used for will be in industrial smoke conveyance conduit
Industrial smoke heat dividing wall type be transferred to the dry flue gas of second exhanst gas outlet discharge after the industrial smoke is given again
To first smoke inlet；First exhanst gas outlet is connected to second smoke inlet；It is described to take off white unit and be equipped with the
One circulation loop and second circulation circuit；The first circulation circuit is equipped with regenerating unit, and the regenerating unit is for flowing through
The regeneration of absorbing liquid after water suction therein；The second circulation circuit is equipped with self circulation heat exchange device；The self circulation heat exchange
The pattern of device is dividing wall type heat exchanger, and its cooling for being used to flow through absorbing liquid therein.
2. taking off white integral system for desulfurizing industrial fume as described in claim 1, which is characterized in that described to take off white machine
Spray tube, filler device, demister and deflector are equipped in group, the filler device is set to the middle part for taking off white unit,
The spray tube is set to the top of the filler device, and the demister is set to above the spray tube, the second circulation
The entrance in circuit is connected to the spray tube.
3. taking off white integral system for desulfurizing industrial fume as described in claim 1, which is characterized in that the flue gas heat
Energy converter is reheater, and the pattern of the reheater is dividing wall type heat exchanger, the industrial smoke conveyance conduit successively with institute
The fluid channel for stating reheater is connected to first smoke inlet；Preferably, the industrial smoke conveyance conduit also with it is described
The connection of first smoke inlet, and the industrial smoke conveyance conduit is equipped with the hot fluid for being used to adjust into the reheater and leads to
The cigarette valve of the industrial smoke flow in road.
4. taking off white integral system for desulfurizing industrial fume as described in claim 1, which is characterized in that the flue gas heat
Energy converter is made of gas cooler and reheater, and the pattern of the gas cooler and the reheater is that dividing wall type changes
Hot device, the cold fluid pass of the gas cooler are connected to form cooling medium circuit with the zone of heat liberation of the reheater,
The cooling medium circuit is equipped with delivery pump, the industrial smoke conveyance conduit successively hot fluid with the gas cooler
Channel is connected to first smoke inlet；Wherein, preferably, the cooling medium circuit is chilled(cooling) water return (CWR)；More preferably, institute
Cooling medium circuit is stated equipped with water tank.
5. taking off white integral system for desulfurizing industrial fume as described in claim 1, which is characterized in that the flue gas heat
Energy converter is made of condenser and reheater, and the pattern of the reheater is dividing wall type heat exchanger, and the condenser is equipped with the
Three smoke inlets, third exhanst gas outlet, overflow port and condensate outlet, the condenser is interior to be equipped with spray tube；The condensate liquid
Outlet is successively connected to the zone of heat liberation of the reheater and the spray tube；The industrial smoke conveyance conduit and described the
The connection of three smoke inlets, the third exhanst gas outlet are connected to first smoke inlet；The condensate outlet and it is described again
The pipeline of the zone of heat liberation connection of hot device is equipped with infusion pump.
6. taking off white integral system for desulfurizing industrial fume as described in claim 1, which is characterized in that the integration
System is equipped with the external circulation heat exchanging device of dividing wall type, it is described take off white unit be equipped with it is that the lower part for taking off white unit from described is drawn, successively
Connect with the zone of heat liberation of the cold fluid pass of the external circulation heat exchanging device, the regenerating unit and the external circulation heat exchanging device
Lead to, return again to the first circulation circuit for taking off white unit lower part；
Preferably, the regenerating unit is made of evaporator and steam-water separator, the evaporator is equipped with dilution entrance, water steams
Vapor outlet and concentrated solution outlet；The cold fluid pass of the external circulation heat exchanging device is connected to the dilution entrance, the concentration
Liquid outlet is connected to the zone of heat liberation of the external circulation heat exchanging device, and the steam outlet is connected to the steam-water separator；
More preferably, the steam-water separator is equipped with secondary steam outlet and condensate outlet；The integral system is additionally provided with carbonated drink
Heat exchanger, cold source enter pipe and cold source outlet, and the pattern of the vapor-water heat exchanger is dividing wall type heat exchanger；The secondary steam
Outlet is connected to the hot fluid pipeline of the vapor-water heat exchanger, and the cold source inlet tube is successively cold with the self circulation heat exchange device
Fluid channel, the vapor-water heat exchanger cold fluid pass be connected to the cold source outlet；
More preferably, the steam-water separator is equipped with secondary steam outlet and condensate outlet；The integral system is additionally provided with flue gas
Auxiliary heater, the flue gas auxiliary heater heat the dry flue gas drawn from the flue gas heat converter for dividing wall type,
The secondary steam outlet is connected to the zone of heat liberation of the flue gas auxiliary heater.
7. taking off white integral system for desulfurizing industrial fume as described in claim 1, which is characterized in that the integration
System is additionally provided with air cooling tower, and the air cooling tower is equipped with the cooling duct passed in and out for cold air, the cold flow of the self circulation heat exchange device
Body channel is connected to form heat transfer loop with the zone of heat liberation of the air cooling tower, and the heat transfer loop is used for the second circulation
Cold air of the heat transfer of absorbing liquid into the cooling duct in circuit.
8. a kind of take off white method for desulfurizing industrial fume, which is characterized in that the method is used as claim 1-7 is any
White integral system is taken off for desulfurizing industrial fume described in, described method includes following steps:
(1) heat dividing wall type is transferred to by the industrial smoke in the industrial smoke conveyance conduit through the flue gas heat heat exchanger
Enter in the desulfurizing tower after the dry flue gas that second exhanst gas outlet is drawn, then through first smoke inlet, the work
Industry flue gas and desulfurization agent, the flue gas after obtaining sulfur-bearing absorbing liquid and desulfurization；
(2) flue gas after the desulfurization be discharged through first exhanst gas outlet and through second smoke inlet enter it is described take off it is white
In unit, the flue gas after the desulfurization is contacted with the absorbing liquid being sent into from the second circulation circuit, after obtaining dry flue gas and water suction
Absorbing liquid, the dry flue gas be discharged from second exhanst gas outlet and through the flue gas heat heat exchanger dividing wall type heat heel row
Out, the absorbing liquid after the water suction is back to described take off in white unit after regenerating unit regeneration；It is inhaled in the absorbing liquid
During water, the heat for flowing through the absorbing liquid in the second circulation circuit is removed by the self circulation heat exchange device and to send
The temperature for entering the absorbing liquid for taking off white unit is 27-40 DEG C；
Wherein, in step (2), the mass ratio for the desulfurizing agent and water absorbing agent in absorbing liquid being sent into through the second circulation circuit is
1:20-1:50, the desulfurizing agent are Ca (OH)2, the water absorbing agent is CaCl2Or LiBr.
9. taking off white method for desulfurizing industrial fume as claimed in claim 8, which is characterized in that in step (1), the work
The temperature of industry flue gas is 90 DEG C -150 DEG C；
And/or in step (1), the temperature of the industrial smoke entered through first smoke inlet is 60 DEG C -90 DEG C；
And/or in step (1), the desulfurizing agent is the Ca (OH) that mass fraction is 45%2Solution.
10. taking off white method for desulfurizing industrial fume as claimed in claim 8, which is characterized in that described in step (2)
The ratio of the flow of absorbing liquid and the flow of absorbing liquid in the second circulation circuit is 0.3-0.4 in first circulation circuit；
And/or in step (2), the dew point of the dry flue gas is 30 DEG C -45 DEG C；After flue gas heat heat exchanger heating
The dry-bulb temperature of dry flue gas is 60-80 DEG C；
And/or the flow of the industrial smoke and the ratio of the flow for the absorbing liquid being sent into through the second circulation circuit are
330-420, wherein the unit of the flow of the industrial smoke is Nm3/ h, the absorbing liquid being sent into through the second circulation circuit
The unit of flow is m3/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810997335.3A CN109248552A (en) | 2018-08-29 | 2018-08-29 | White integral system and method are taken off for desulfurizing industrial fume |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810997335.3A CN109248552A (en) | 2018-08-29 | 2018-08-29 | White integral system and method are taken off for desulfurizing industrial fume |
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| CN109248552A true CN109248552A (en) | 2019-01-22 |
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Application publication date: 20190122 |